INDENTURE, dated as of February 20, 1998 by and between TELIGENT, INC.,
a Delaware corporation duly organized and existing under the laws of the State
of (herein called the "Company"), having its principal office at 8065 
Leesburg Pike, Vienna, VA 22182, and FIRST UNION NATIONAL BANK, a national 
banking association (herein called the "Trustee").

                            RECITALS OF THE COMPANY

        The Company has duly authorized the creation of an issue of 11 1/2% 
Senior Discount Notes due 2008 (herein called the "Initial Notes"), and its 
11 1/2% Series B Senior Discount Notes due 2008 (the "Exchange Notes" and, 
together with the Initial Notes, the "Notes") of substantially the tenor and 
amount hereinafter set forth, and to provide therefor, the Company has duly 
authorized the execution and delivery of this Indenture.  The Company has 
outstanding 11 1/2% Senior Notes due 2007 (the "Senior Notes") issued pursuant 
to an indenture dated November 26, 1997 (the "Senior Notes Indenture"), and 
the Notes governed hereby will rank pari passu in right of payment with the 
Senior Notes.  The Trustees is also the trustee under the Senior Notes 
Indenture.

        Upon the issuance of the Exchange Notes, if any, or the 
effectiveness of the Shelf Registration Statement (as defined herein), this 
Indenture will be subject to the provisions of the Trust Indenture Act 
of 1939, as amended, that are required to be part of this Indenture and 
shall, to the extent applicable, be governed by such provisions.

        All things necessary have been done to make the Notes, when 
executed by the Company and authenticated and delivered hereunder and duly 
issued by the Company, the valid obligations of the Company and to make this 
Indenture a valid agreement of the Company, in accordance with their and its 
terms.

        NOW, THEREFORE, THIS INDENTURE WITNESSETH:

        For and in consideration of the premises and the purchase of the 
Notes by the Holders thereof, it is mutually covenanted and agreed, for the 
equal and proportionate benefit of all Holders, as follows:


   
                                    ARTICLE ONE

                          DEFINITIONS AND OTHER PROVISIONS
                               OF GENERAL APPLICATION

        SECTION 101.  Definitions.
                      -----------
        For all purposes of this Indenture, except as otherwise 
expressly provided or unless the context otherwise requires:

        (a)  the terms defined in this Article have the meanings assigned 
        to them in this Article, and include the plural as well as the 
        singular;

        (b)  all other terms used herein that are defined in the Trust 
        Indenture Act, either directly or by reference therein, have the 
        meanings assigned to them therein, and the terms "cash transaction" 
        and "self-liquidating paper", as used in TIA Section 311, shall have 
        the meanings assigned to them in the rules of the Commission adopted 
        under the Trust Indenture Act;

        (c)  all accounting terms not otherwise defined herein have the 
        meanings assigned to them in accordance with GAAP; and

        (d)  the words "herein", "hereof" and "hereunder" and other words 
        of similar import refer to this Indenture as a whole and not to any 
        particular Article, Section or other subdivision.

        Certain terms, used principally in Article Ten, are defined in that 
Article.

        "Accounts Receivable Subsidiary" means any Restricted Subsidiary 
of the Company that is, directly or indirectly, wholly owned by the Company 
(other than directors' qualifying shares) and organized for the purpose of 
and engaged in (i) purchasing, financing, and collecting accounts receivable 
obligations of customers of the Company or its Restricted Subsidiaries, (ii) 
the sale or financing of such accounts receivable or interests therein and 
(iii) other activities incident thereto.

        "Accreted Value" as of any date (the "Specified Date") means, with 
respect to each $1,000 principal amount at Stated Maturity of Notes:

        (i)  if the Specified Date is one of the following dates (each a 
        "Semi-Annual Accrual Date"), the amount set forth opposite such date 
        below:  



                                                               Accreted
        Semi-Annual Accrual Date                                Value
        ---------------------------------------------------------------
                                                            

        Issue Date .................................            $569.78
        September 1, 1998 ..........................             604.61
        March 1, 1999 ..............................             639.37
        September 1, 1999 ..........................             676.14
        March 1, 2000 ..............................             715.02
        September 1, 2000 ..........................             756.13
        March 1, 2001 ..............................             799.61
        September 1, 2001 ..........................             845.59
        March 1, 2002 ..............................             894.21
        September 1, 2002 ..........................             945.63
        March 1, 2003 ..............................           $1000.00;



        (ii)  if the Specified Date occurs between two Semi-Annual Accrual 
        Dates, the sum of (a) the Accreted Value for the Semi-Annual Accrual 
        Date immediately preceding the Specified Date and (b) an amount equal 
        to the product of (x) the Accreted Value for the immediately following 
        Semi-Annual Accrual Date less the Accreted Value for the immediately 
        preceding Semi-Annual Accrual Date and (y) a fraction, the numerator 
        of which is the number of days actually elapsed from the immediately 
        preceding Semi-Annual Accrual Date to the Specified Date and the 
        denominator of which is 180; and

        (iii)  if the Specified Date is after March 1, 2003, $1,000.

        "Acquired Debt" means Debt of a Person (a) existing at the time 
such Person becomes a Subsidiary or (b) assumed in connection with the 
acquisition of assets from such Person; provided that, for the purposes of 
Section 1010, such Debt shall be deemed to be incurred on the date of the 
related acquisition of assets from any Person or the date the acquired 
Person becomes a Restricted Subsidiary.

        "Act", when used with respect to any Holder, has the meaning 
specified in Section 104.


        "Affiliate" means, as to any Person, any other Person that 
directly or indirectly controls, or is under common control with, or is 
controlled by, such Person. As used in this definition, "control" 
(including, with its correlative meanings, "controlled by" and "under common 
control with") shall mean possession, directly or indirectly, of power to 
direct or cause the direction of management or policies of such Person 
(whether through ownership of securities or partnership or other ownership 
interests, by contract or otherwise), provided that, in any event, any 
                                      --------
Person that owns directly or indirectly 10% of more of the securities having 
ordinary voting power for the election of directors or other governing body 
of a corporation or 10% or more of the partnership or other ownership 
interests of any other Person (other than as a limited partner of such other 
Person) shall be deemed to control such corporation or other Person. 
Notwithstanding the foregoing, no individual shall be deemed to be an 
Affiliate of a Person solely by reason of his or her being an officer or 
director (or equivalent) of such Person.

        "Arrangement Commitment Letter" means the commitment letter 
among Northern Telecom, Inc. and the financial institutions acting as 
arrangement agents thereunder setting forth the terms and conditions under 
which the arranging agents will provide the facility contemplated by the 
Financing Commitment Letter and underwrite and arrange the syndication of 
such facility.

        "Asset Sale" means, with respect to any Person, any transfer, 
conveyance, sale, lease or other disposition (including, without limitation, 
by way of sale-and-leaseback and dispositions pursuant to any consolidation 
or merger) by such Person or any of its Restricted Subsidiaries to any 
Person other than to such Person or its Restricted Subsidiaries in any 
single transaction or series of transactions of (i) shares of Capital Stock 
or other ownership interests of another Person (other than directors' 
qualifying shares) or (ii) any other property or assets of such Person or 
any of its Restricted Subsidiaries other than sales of property or assets in 
the ordinary course of business and consistent with past practices. For 
purposes of this definition, any series of related transactions that, if 
effected as a single transaction, would constitute an Asset Sale, shall be 
deemed to be a single Asset Sale when the last such transaction that is a 
part thereof is effected, provided that such last transaction is effected 
                          --------
within 12 months of the first such transaction.  For purposes of Section 
[1016], the term "Asset Sale" (i) when used with respect to the Company, 
shall exclude any asset disposition permitted pursuant to Article Eight that 
constitutes a disposition of all or substantially all of the assets of the 
Company and its Restricted Subsidiaries taken as a whole, (ii) shall exclude 
any Asset Sale of less than or equal to $2.0 million, (iii) shall exclude 
sales of Eligible Cash Equivalents and Permitted Temporary Investments, and 
(iv) shall exclude any sale, conveyance, disposition or other transfer of 
the Capital Stock of an Unrestricted Subsidiary or other Investment 
described in clause (iv) of the definition of Restricted Payment, provided 
                                                                  --------
that such Investment was permitted by the terms of this Indenture. 
Notwithstanding the provisions of Section 1016, the Company and its 
Restricted Subsidiaries may (a) sell or dispose of damaged, worn out or 
other obsolete property in the ordinary course of business so long as such 
property is no longer necessary for the proper conduct of the business of 
the Company or such Restricted Subsidiary, as applicable, (b) create or 
assume Liens (or permit any foreclosure thereon) securing Debt to the extent 
that such Lien does not violate Section 1011, and (c) sell, convey, 
transfer, lease or otherwise dispose of accounts receivable to an Accounts 
Receivable Subsidiary or to Persons that are not Affiliates of the Company 
or any Subsidiary of the Company in the ordinary course of business, 
including in connection with financing transactions.


        "Asset Sale Offer" has the meaning set forth in Section 1016.

        "Attributable Debt" means, with respect to an operating lease 
included in any Sale and Leaseback Transaction at the time of determination, 
the present value (discounted at the interest rate implicit in the lease or, 
if not known, at the Company's incremental borrowing rate) of the 
obligations of the lessee of the property subject to such lease for rental 
payments during the remaining term of the lease included in such 
transaction, including any period for which such lease has been extended or 
may, at the option of the lessor, be extended, or until the earliest date on 
which the lessee may terminate such lease without penalty or upon payment of 
penalty (in which case the rental payments shall include such penalty), 
after excluding from such rental payments all amounts required to be paid on 
account of maintenance and repairs, insurance, taxes, assessments, water, 
utilities and similar charges.

        "Average Life" means, as of any date, with respect to any Debt, 
the quotient obtained by dividing (i) the sum of the products of (x) the 
number of years from such date to the dates of each scheduled principal 
payment (including any sinking fund or mandatory redemption payment 
requirements) of such Debt multiplied in each case by (y) the amount of such 
principal payment by (ii) the sum of all such principal payments.

        "Board of Directors" means either the board of directors of the 
Company or any duly authorized committee of that board.

        "Board Resolution" means a copy of a resolution certified by the 
Secretary or an Assistant Secretary of the Company to have been duly adopted 
by the Board of Directors and to be in full force and effect on the date of 
such certification, and delivered to the Trustee.

        "Business Day" means each Monday, Tuesday, Wednesday, Thursday 
and Friday that is not a day on which banking institutions in the Borough of 
Manhattan, The City of New York are authorized or obligated by law or 
executive order to close.

        "Capital Lease Obligation" of any Person means the obligation to 
pay rent or other payment amounts under a lease of (or other Debt 
arrangement conveying the right to use) real or personal property of such 
Person that is required to be classified and accounted for as a capital 
lease or a liability on the face of a balance sheet of such Person in 
accordance with GAAP and the Stated Maturity thereof shall be the date of 
the last payment of rent or any amount due under such lease prior to the 
first date upon which such lease may be terminated by the lessee without 
payment of a penalty.

        "Capital Stock" in any Person means any and all shares, 
interests, participations or other equivalents in the equity interest 
(however designated) in such Person and any rights (other than Debt 
securities convertible into an equity interest), warrants or options to 
acquire an equity interest in such Person.

        "Change of Control" means the occurrence of any of the following 
events: (i) any "person" or "group" (as such terms are used in Sections 13(d)
and 14(d) of the Exchange Act) other than a Permitted Holder is or becomes the 
"beneficial owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange 
Act, except that a Person shall be deemed to have "beneficial ownership" of 
all securities that such Person has the right to acquire, whether such right 
is exercisable immediately or only after the passage of time, upon the 
happening of an event or otherwise), directly or indirectly, of more than 
50% of the total Voting Capital Stock of the Company; provided that 
                                                      --------
Permitted Holders do not otherwise control the election of a majority of the 
Board of Directors of the Company; (ii) the Company consolidates with, or 
merges with or into, another Person or sells, assigns, conveys, transfers, 
leases or otherwise disposes of all or substantially all of its assets to 
any Person, or any Person consolidates with, or merges with or into, the 
Company, in any such event pursuant to a transaction in which the 
outstanding Voting Capital Stock of the Company is converted into or 
exchanged for cash, securities or other property, and immediately after such 
transaction a "person" or "group" (as such terms are used in Sections 13(d) 
and 14(d) of the Exchange Act) other than a Permitted Holder is the 
"beneficial owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange 
Act, except that a Person shall be deemed to have "beneficial ownership" of 
all securities that such Person has the right to acquire, whether such right 
is exercisable immediately or only after the passage of time, upon the 
happening of an event or otherwise), directly or indirectly, of more than 
50% of the total Voting Capital Stock of the surviving or transferee Person; 
provided that Permitted Holders do not otherwise control the election of a 
- --------
majority of the Board of Directors of the Company; (iii) during any period 
of two consecutive years, individuals who at the beginning of such period 
constituted the Board of Directors (together with any new directors whose 
election by the Board of Directors or whose nomination for election by the 
members of the Company was approved by (a) one or more Permitted Holders or 
(b) a vote of a majority of the directors of the Company then still in 
office who were either directors at the beginning of such period or whose 
election or nomination for election was previously so approved) cease for 
any reason to constitute 66_% of the Board of Directors then in office; and 
(iv) the approval by the holders of Capital Stock of the Company of any plan 
or proposal for the liquidation or dissolution of the Company.

        "Closing Date" means the date on which the Notes originally are 
issued under this Indenture.


        "Commission" means the Securities and Exchange Commission, as 
from time to time constituted, created under the Securities Exchange Act of 
1934, or, if at any time after the execution of this Indenture such 
Commission is not existing and performing the duties now assigned to it 
under the Trust Indenture Act, then the body performing such duties at such 
time.

        "Common Stock" means, with respect to the Company, the Class A 
Common Stock, the Class B Common Stock or any similar common stock of the 
Company.

        "Company" means the Person named as the "Company" in the first 
paragraph of this Indenture, until a successor Person shall have become such 
pursuant to the applicable provisions of this Indenture, and thereafter 
"Company" shall mean such successor Person.

        "Company Request" or "Company Order" means a written request or 
order signed in the name of the Company by an officer of the Company, and 
delivered to the Trustee.

        "Consolidated Interest Expense" means, with respect to any 
Person for any period, without duplication (A) the sum of (i) the aggregate 
amount of cash and non-cash interest expense (including capitalized 
interest) of such Person and its Restricted Subsidiaries for such period as 
determined on a consolidated basis in accordance with GAAP in respect of 
Debt (including, without limitation, (v) any amortization of debt discount, 
(w) net costs associated with Interest Swap Obligations (including any 
amortization of discounts), (x) the interest portion of any deferred payment 
obligation, (y) all accrued interest, and (z) all commissions, discounts and 
other fees and charges owed with respect to letters of credit, bankers' 
acceptances or similar facilities) paid or accrued, or scheduled to be paid 
or accrued, during such period; (ii) dividends on preferred stock or 
preferred equity interests of such Person and of its Restricted Subsidiaries 
(if paid to a Person other than such Person or its Restricted Subsidiaries) 
declared and payable in cash; (iii) the portion of any rental obligation of 
such Person or its Restricted Subsidiaries in respect of any Capital Lease 
Obligation allocable to interest expense in accordance with GAAP; and (iv) 
the portion of any rental obligation of such Person or its Restricted 
Subsidiaries in respect of any Sale and Leaseback Transaction allocable to 
interest expense (determined as if such were treated as a Capital Lease 
Obligation); less (B) to the extent included in (A) above, amortization or 
write-off of deferred financing costs of such Person and its Restricted 
Subsidiaries during such period and any charge related to any premium or 
penalty in connection with redeeming or retiring any Debt of such Person and 
its Restricted Subsidiaries prior to its stated maturity; in the case of 
both (A) and (B) above, after elimination of intercompany accounts among 
such Person and its Restricted Subsidiaries and as determined in accordance 
with GAAP.


        "Consolidated Net Income" of any Person means, for any period, 
the aggregate net income (or net loss) of such Person and its Restricted 
Subsidiaries for such period on a consolidated basis determined in 
accordance with GAAP; provided that there shall be excluded therefrom, 
                      --------
without duplication, (a) all items classified as extraordinary, (b) any net 
income or loss of any Person other than such Person and its Restricted 
Subsidiaries, except with respect to net income to the extent of the amount 
of dividends or other distributions actually paid in cash to such Person or 
its Restricted Subsidiaries by such other Person during such period, (c) the 
net income or loss of any Person acquired by such Person or any of its 
Restricted Subsidiaries in a pooling-of-interests transaction for any period 
prior to the date of such acquisition, (d) gains or losses in respect of any 
sale, transfer or disposition of assets other than in the ordinary course of 
business by such Person or its Restricted Subsidiaries, (e) the net income 
or loss of any Restricted Subsidiary of such Person to the extent that the 
payment of dividends or other distributions to such Person at the time is 
restricted by the terms of its charter or any agreement, instrument, 
contract, judgment, order, decree, statute, rule, governmental regulation or 
otherwise, except for any dividends or distributions actually paid or that 
could have been paid by such Restricted Subsidiary to such Person in 
compliance with such restrictions, (f) any non-cash, nonrecurring charges, 
(g) any non-cash compensation charge arising from any grant of stock options 
and (h) any gain or loss, net of taxes, realized on the termination of an 
employee pension benefit plan.

        "Corporate Trust Office" means the principal corporate trust 
office of the Trustee, at which at any particular time its corporate trust 
business shall be administered, which office at the date of execution of 
this Indenture is located at 901 E. Cary Street, 2nd Floor, Richmond, 
Virginia 23219 except that, with respect to presentation of Notes for 
payment or for registration of transfer or exchange, such term shall mean 
the office or agency of the Trustee at which, at any particular time, its 
corporate agency business shall be conducted.

        "Corporation" includes corporations, associations, companies and 
business trusts.

        "Credit Agreement" means a secured or unsecured credit agreement 
providing for revolving credit loans, term loans and/or letters of credit 
between the Company and one or more lenders, as such agreement may be 
amended, modified, supplemented, refunded, refinanced, restructured, 
renewed, repaid or replaced from time to time (whether in whole or in part, 
whether with the original agent or lenders or other agents or lenders or 
otherwise and whether provided pursuant to the facility contemplated by the 
Financing Commitment Letter or otherwise).

        "Currency Hedge Obligations" means the obligations of any 
Person, whether or not incurred in the ordinary course of business, pursuant 
to any foreign currency exchange agreement, option or futures contract or 
other similar agreement or arrangement.


        "Debt" means at any time (without duplication), with respect to 
any Person, and whether or not contingent, (i) any obligation of such Person 
for money borrowed, (ii) any obligation of such Person evidenced by bonds, 
debentures, notes, Guarantees or other similar instruments, including, 
without limitation, any such obligations incurred in connection with 
acquisition of property, assets or businesses, excluding trade accounts 
payable arising in the ordinary course of business, (iii) any reimbursement 
obligation of such Person with respect to letters of credit, bankers' 
acceptances or similar facilities issued for the account of such Person, 
(iv) any obligation of such Person issued or assumed as the deferred 
purchase price of property or services (but excluding trade accounts payable 
or accrued liabilities arising in the ordinary course of business that in 
either case are not more than 90 days overdue or are being contested in good 
faith), which purchase price is due more than six months after the date of 
placing such property in service or taking delivery and title thereto or the 
completion of such service, (v) any Capital Lease Obligation of such Person, 
(vi) the maximum fixed redemption or repurchase price of Redeemable Capital 
Stock of such Person at the date of determination, (vii) to the extent not 
otherwise included in this definition of "Debt", any Interest Swap 
Obligations or Currency Hedge Obligations of such Person at the date of 
determination, (viii) Attributable Debt of such Person with respect to any 
Sale and Leaseback Transaction to which such Person is a party, (ix) 
preferred stock of a Restricted Subsidiary of such Person, and (x) to the 
extent not otherwise included in this definition of "Debt", any obligation 
of the type referred to in clauses (i) through (ix) of this definition of 
another Person and all dividends and distributions of another Person the 
payment of which, in either case, such Person has Guaranteed, or the payment 
of which is secured by (or for which the holder of such obligation has an 
existing right, contingent or otherwise, to be secured by) any Lien upon or 
with respect to property or assets owned by such Person, provided, however, 
                                                         --------  -------
if the obligations secured by a Lien (other than a Permitted Lien not 
securing any liability that would itself constitute Debt) on any assets or 
property have not been assumed by such Person in full or are not such 
Person's legal liability in full, the amount of such Debt for purposes of 
this definition shall be limited to the lesser of the amount of Debt secured 
by such Lien or the value of the property subject to such Lien.  For 
purposes of the preceding sentence, the maximum fixed repurchase price of 
any Redeemable Capital Stock that does not have a fixed repurchase price 
shall be calculated in accordance with the terms of such Redeemable Capital 
Stock as if such Redeemable Capital Stock were repurchased on any date on 
which Debt shall be required to be determined pursuant to this  Indenture;
provided, however, that if such Redeemable Capital Stock is not then 
- --------  -------
permitted to be repurchased, the repurchase price shall be the book value of 
such Redeemable Capital Stock.  The principal amount outstanding of any Debt 
issued with original issue discount is the accreted value of such Debt and 
Debt shall not include any liability for federal, state, local or other 
taxes.  The amount of Debt of any Person at any date shall be the 
outstanding balance at such date of all unconditional obligations as 
described above and the maximum liability of any Guarantees at such date.


        "Debt Securities" means any debt securities (including any 
Guarantee of such securities) issued by the Company and/or any Restricted 
Subsidiary in connection with a public offering (whether or not 
underwritten) or a private placement (provided such private placement is 
underwritten for resale pursuant to Rule 144A, Regulation S or otherwise 
under the Securities Act or sold on an agency basis by a broker-dealer or 
one of its Affiliates to ten or more beneficial holders); it being 
understood that the term "Debt Securities" shall not include any evidence of 
indebtedness under the Credit Agreement or other commercial bank borrowings 
or similar borrowings (including the facility contemplated by the Financing 
Commitment Letter), recourse transfers of financial assets, capital leases 
or other types of borrowings incurred in a manner not customarily viewed as 
a "securities offering", or any Guarantees in respect of any of the 
foregoing.

        "Debt to Annualized EBITDA Ratio" means, as at any date of 
determination, the ratio of (i) the aggregate amount of Debt of the Company 
and its Restricted Subsidiaries on a consolidated basis as at the date of 
determination to (ii) the aggregate amount of EBITDA of the Company and its 
Restricted Subsidiaries for the two preceding fiscal quarters for which 
financial information is available immediately prior to the date of 
determination multiplied by two; provided that any Debt incurred or retired 
                                 --------
by the Company or any of its Restricted Subsidiaries during the fiscal 
quarter in which the transaction date occurs shall be calculated as if such 
Debt was so incurred or retired on the first day of the fiscal quarter in 
which the date of determination occurs; and provided further that if the 
                                            -------- -------
transaction giving rise to the need to calculate the Debt to Annualized 
EBITDA Ratio would have the effect of increasing or decreasing Debt or 
EBITDA in the future, Debt or EBITDA shall be calculated on a pro forma 
basis as if such transaction had occurred on the first day of such two 
fiscal quarter period preceding the date of determination, and (y) if during 
such two fiscal quarter period, the Company or any of its Restricted 
Subsidiaries shall have engaged in any Asset Sale of any company, entity or 
business, EBITDA for such period shall be reduced by an amount equal to the 
EBITDA (if positive), or increased by an amount equal to the EBITDA (if 
negative), directly attributable to the company, entity or business that is 
the subject of such Asset Sale and any related retirement of Debt as if such 
Asset Sale and related retirement of Debt had occurred on the first day of 
such period or (z) if during such two fiscal quarter period the Company or 
any of its Restricted Subsidiaries shall have acquired any company, entity 
or business, EBITDA shall be calculated on a pro forma basis as if such 
acquisition and related financing had occurred on the first day of such 
period.

        "Default" means any event, act or condition the occurrence of 
which is, or after notice or the passage of time or both would be, an Event 
of Default.

        "Defaulted Interest" has the meaning specified in Section 307.

        "Depositary" shall mean The Depository Trust Company, its 
nominees, and their respective successors.

        "Disinterested Director" means, with respect to any transaction 
or series of related transactions, a member of the Board of Directors of the 
Company who has no material direct or indirect financial interest in or with 
respect to such transaction or series of related transactions. For purposes 
of this definition, no Person would be deemed not to be a Disinterested 
Director solely because such Person or an Affiliate of such Person holds 
Capital Stock of the Company.

        "EBITDA" means, with respect to any Person for any period, the 
sum for such Person for such period of Consolidated Net Income plus, to the 
extent reflected in the income statement of such Person for such period from 
which Consolidated Net Income is determined, without duplication, (i) 
Consolidated Interest Expense, (ii) income tax expense, (iii) depreciation 
expense, (iv) amortization expense including without limitation, 
amortization of goodwill and other intangibles, (v) any charge related to 
any premium or penalty paid in connection with redeeming or retiring any 
Debt prior to its stated maturity and (vi) any non-cash charges excluded in 
calculating Consolidated Net Income less any non-cash charges added to the 
calculation of Consolidated Net Income (excluding in each case any such non-
cash charge that requires an accrual of or reserve for cash charges for any 
future period).


        "Eligible Cash Equivalents" means (i) United States dollars, 
(ii) securities issued or directly and fully guaranteed or insured by the 
United States government or any agency or instrumentality thereof having 
maturities of not more than one year and one day from the date of 
acquisition, (iii) certificates of deposit and Eurodollar time deposits with 
maturities of one year or less from the date of acquisition, bankers' 
acceptances with maturities not exceeding six months and overnight bank 
deposits, in each case with any commercial bank(s) domiciled in the United 
States or in any member of the Organization for Economic Cooperation and 
Development having capital and surplus in excess of $500.0 million and a 
Keefe Bank Watch Rating of "B" or better, (iv) repurchase obligations with a 
term of not more than seven days for underlying securities of the types 
described in clauses (ii) and (iii) entered into with any financial 
institution meeting the qualifications specified in clause (iii) above, (v) 
commercial paper rated no lower than P-2 or the equivalent thereof by 
Moody's Investors Service, Inc. or no lower than A-2 or the equivalent 
thereof by Standard & Poor's Rating Services or corporate notes, bonds or 
medium term notes rated no lower than A-2 or the equivalent thereof by 
Moody's Investors Service, Inc. or no lower than A or the equivalent thereof 
by Standard & Poor's Ratings Services, and in each case maturing within one 
year and one day after the date of acquisition, (vi) direct obligations 
issued by any state of the United States or any political subdivision of any 
such state or political instrumentality thereof maturing, or subject to 
tender at the option of the holder thereof, within 90 days after the date of 
acquisition, having a rating of A from Standard & Poor's Ratings Services or 
A-2 from Moody's Investors Service, Inc., (vii) asset-backed securities with 
an Average Life equal to or less than one year and one day from the time of 
acquisition and rated no lower than Aaa or the equivalent thereof by Moody's 
Investors Service, Inc. or AAA or the equivalent thereof by Standard & 
Poor's Ratings Services, and (viii) investments in money market funds 
substantially all of whose assets comprise securities of the types described 
in clauses (i) through (vii).

        "Event of Default" has the meaning specified in Section 501.

        "Exchange Act" means the Securities Exchange Act of 1934, as 
amended.

        "Exchange Notes" has the meaning stated in the first recital of 
this Indenture and refers to any Exchange Notes containing terms 
substantially identical to the Initial Notes (except that (i) such Exchange 
Notes shall not contain terms with respect to transfer restrictions and 
shall be registered under the Securities Act, and (ii) certain provisions 
relating to Additional Interest (as defined in the Note) shall be 
eliminated) that are issued and exchanged for the Initial Notes in 
accordance with the Exchange Offer, as provided for in the Registration 
Rights Agreement and this Indenture.

        "Exchange Offer" means the offer by the Company to the Holders 
of the Initial Notes to exchange all of the Initial Notes for Exchange 
Notes, as provided for in the Registration Rights Agreement.

        "Exchange Offer Registration Statement" means the Exchange Offer 
Registration Statement as defined in the Registration Rights Agreement.

        "Fair Market Value" means, with respect to any asset or property, the 
sale value that could be obtained in an arm's-length transaction, for cash, 
between a willing seller and a willing buyer, neither of whom is under 
pressure or compulsion to complete the transaction. Unless otherwise 
specified herein, Fair Market Value shall be determined by the Board of 
Directors of the Company acting in good faith and as of the date on which 
such determination is made.

        "Federal Communications Commission" means the Federal 
Communications Commission, or, if at any time after the execution of this 
Indenture such Commission is not existing and performing the duties now 
assigned to it, then the body performing such duties at such time.

        "Financing Commitment Letter" means the commitment letter 
between the Company and Northern Telecom, Inc. setting forth the anticipated 
terms and conditions under which Northern Telecom, Inc. will provide loans 
to the Company in an aggregate amount of up to $780.0 million that will be 
used to provide working capital and finance the purchase of certain 
telecommunications system equipment, software and services subject to the 
Arrangement Commitment Letter.


        "GAAP" means United States generally accepted accounting 
principles, consistently applied, as set forth in the opinions and 
pronouncements of the Accounting Principles Board of the American Institute 
of Certified Public Accountants and statements and pronouncements of the 
Financial Accounting Standards Board, or in such other statements by such 
other entity as may be approved by a significant segment of the accounting 
profession of the United States, that are applicable to the circumstances as 
of the date of determination; provided, however, that, except as otherwise 
                              --------  -------
specifically provided, all calculations made for purposes of determining 
compliance with the terms of the provisions of this Indenture shall utilize 
GAAP in effect at the time of preparation of, and in accordance with the 
GAAP used to prepare, the historical financial statements of the Company on 
the Issue Date.

        "Global Notes" has the meaning set forth in Section 201.

        "Guarantee" means, as applied to any obligation of another 
Person, (i) a guarantee (other than by endorsement of negotiable instruments 
for collection in the ordinary course of business), direct or indirect, in 
any manner, of any part or all of such obligation, (ii) any direct or 
indirect obligation, contingent or otherwise, of a Person guaranteeing or 
having the effect of guaranteeing the obligations of any other Person in any 
manner and (iii) an agreement of a Person, direct or indirect, contingent or 
otherwise, the practical effect of which is to assure in any way the payment 
or performance (or payment of damages in the event of non-performance) of 
all or any part of such obligation of another Person (and "Guaranteed", 
"Guaranteeing" and "Guarantor" shall have meanings correlative to the 
foregoing).

        "Holder" means a Person in whose name a Note is registered in 
the Note Register.

        "incur" means, with respect to any Debt or other obligation of 
any Person, to create, issue, incur (by conversion, exchange or otherwise), 
extend, assume, Guarantee or otherwise become liable in respect of such Debt 
or other obligation or the recording, as required pursuant to GAAP or 
otherwise, of any such Debt or obligation on the balance sheet of such 
Person; provided that neither the accrual of interest nor the accretion of 
        --------
original issue discount shall be considered an incurrence of Debt (and 
"incurrence", "incurred", "incurrable" and "incurring" shall have meanings 
correlative to the foregoing); provided further that a change in GAAP that 
                               -------- -------
results in an obligation of such Person that exists at such time becoming 
Debt shall not be deemed an incurrence of such Debt. Debt otherwise incurred 
by a Person before it becomes a Restricted Subsidiary of the Company shall 
be deemed to have been incurred at the time at which it becomes a Restricted 
Subsidiary.

        "Indenture" means this instrument as originally executed and as 
it may from time to time be supplemented or amended by one or more 
indentures supplemental hereto entered into pursuant to the applicable 
provisions hereof.

        "Initial Notes" has the meaning specified in the recitals to 
this Indenture.

        "Interest Payment Date" means the Stated Maturity of an 
installment of interest on the Notes.

        "Interest Swap Obligations" means, with respect to any Person, 
the obligations of such Person pursuant to any interest rate swap agreement, 
interest rate cap, collar or floor agreement or other similar agreement or 
arrangement.

        "Invested Capital" means the sum of (a) 15% of the aggregate net 
cash proceeds received by the Company (or its predecessor) from the issuance 
of (or capital contributions with respect to) any Qualified Capital Stock, 
(b) the aggregate net cash proceeds received by the Company from the 
issuance of (or capital contributions with respect to) any Qualified Capital 
Stock (including preferred stock but only if any redemption thereof is 
permitted only after the Stated Maturity of the Notes) or Subordinated 
Stockholder Debt subsequent to the Issue Date, other than the issuance of 
Qualified Capital Stock to a Restricted Subsidiary of the Company, and (c) 
all net cash proceeds from the sales of Redeemable Capital Stock of the 
Company or Debt securities of the Company convertible into Qualified Capital 
Stock of the Company, in each case upon such redemption or conversion 
thereof into Qualified Capital Stock; provided, however, that Invested 
                                      --------  -------
Capital shall be excluded from any computation thereof to the extent 
utilized to make a Restricted Payment.

        "Investment" by any Person means any direct or indirect loan, 
advance (or other extension of credit, including any Guarantee) or capital 
contribution to (by means of any transfer of cash or other property to 
others or any other payments for property or services for the account or use 
of others), the purchase or acquisition of any Capital Stock, bonds, notes, 
debentures or other securities of, the acquisition, by purchase or 
otherwise, of all or substantially all of the businesses or assets or stock 
or other evidence of beneficial ownership of, any Person or making of any 
Investment in any Person.  Investments shall exclude accounts receivable and 
other extensions of trade credit on commercially reasonable terms in 
accordance with normal trade practices.

        "Issue Date" means the date on which the Notes are first 
authenticated and delivered under this Indenture.

        "Lien" means, with respect to any property or other asset, any 
mortgage or deed of trust, pledge, hypothecation, assignment, deposit 
arrangement, security interest, lien (statutory or other), charge, easement, 
preference, priority or other encumbrance on or with respect to such 
property or other asset (including, without limitation, any conditional sale 
or other title retention agreement having substantially the same economic 
effect as any of the foregoing).

        "Maturity", when used with respect to a Note, means the date on 
which the principal of such Note becomes due and payable as provided therein 
or herein, whether at the Stated Maturity, on the purchase date established 
pursuant to the terms of this Indenture with regard to a Change of Control 
Offer or an Asset Sale Offer, as applicable, or by declaration of 
acceleration, call for redemption or otherwise.


        "Net Cash Proceeds" means, (a) with respect to Asset Sales of 
any property or other assets by a Person or its Restricted Subsidiaries, 
cash and cash equivalents received net of (i) all reasonable out-of-pocket 
expenses of such Person or such Restricted Subsidiary incurred in connection 
with such sale, including, without limitation, all legal, title and 
recording tax expenses, commissions and other fees and expenses incurred 
(but excluding any finder's fee or broker's fee payable to any Affiliate of 
such Person) and all federal, state, foreign and local taxes arising in 
connection with such an Asset Sale that are paid or required to be accrued 
as a liability under GAAP by such Person or its Restricted Subsidiaries, 
(ii) all payments made by such Person or its Restricted Subsidiaries on any 
Debt that is secured by such properties or other assets in accordance with 
the terms of any Lien upon or with respect to such properties or other 
assets or that must, by the terms of such Debt or in order to obtain a 
necessary consent to such transaction or by applicable law, be repaid in 
connection with such Asset Sale, (iii) all contractually required 
distributions and other payments made to minority interest holders in 
Restricted Subsidiaries of such Person as a result of such transaction, and 
(iv) appropriate amounts to be provided by the Company or any Restricted 
Subsidiary of the Company as a reserve against any liabilities associated 
with such Asset Sale, including, without limitation, pension and other post-
employment benefit liabilities, liabilities related to environmental matters 
and liabilities under any indemnification obligations associated with such 
Asset Sale; provided that, in the event that any consideration for a 
            --------
transaction (that otherwise would constitute Net Cash Proceeds) is required 
to be held in escrow pending determination of whether a purchase price 
adjustment shall be made or is reserved pursuant to clause (iv) above, such 
consideration (or any portion thereof) shall become Net Cash Proceeds only 
at such time as it is released to such Person or its Restricted Subsidiaries 
from escrow or ceases to be reserved, and provided that any non-cash 
                                          --------
consideration received in connection with any transaction that is 
subsequently converted to cash shall be deemed to be Net Cash Proceeds at 
such time, for purposes of an Asset Sale and shall thereafter be applied in 
accordance with Section 1016, and (b) with respect to any issuance or sale 
of Capital Stock, the proceeds of such issuance or sale in the form of cash 
or cash equivalents, including payments in respect of deferred payment 
obligations (to the extent corresponding to the principal, but not interest, 
component thereof) when received in the form of cash or cash equivalents 
(except to the extent such obligations are financed or sold with recourse to 
the Company or any Restricted Subsidiary of the Company) and proceeds from 
the conversion of other property received when converted to cash or cash 
equivalents, net of attorney's fees, underwriters' or placement agents' 
fees, discounts or commissions and brokerage, consultant and other fees 
incurred in connection with such issuance or sale and net of taxes paid or 
payable as a result thereof.  For purposes of the preceding clause (b) the 
value of the aggregate Net Cash Proceeds received by the Company upon the 
issuance of Capital Stock either upon the conversion of convertible Debt or 
Redeemable Capital Stock, shall be the Net Cash Proceeds received upon the 
issuance of such Debt or Redeemable Capital Stock plus the incremental 
amount received by the Company upon the conversion, exchange or exercise 
thereof.

        "Non-U.S. Person" means a person who is not a U.S. person as 
defined in Regulation S.

        "Note Register" and "Note Registrar" have the respective 
meanings specified in Section 305.

        "Notes" has the meaning stated in the first recital of this 
Indenture and more particularly means any Notes authenticated and delivered 
under this Indenture.

        "Officers' Certificate" means a certificate signed by the 
Chairman of the Board of Directors, a Vice Chairman of the Board of 
Directors, the President or a Vice President, and by the Chief Financial 
Officer, the Chief Accounting Officer, the Treasurer, an Assistant 
Treasurer, the Secretary or an Assistant Secretary of the Company and 
delivered to the Trustee, which certificate shall comply with this 
Indenture.

        "Offshore Global Note" has the meaning set forth in Section 201.

        "Offshore Physical Note" has the meaning set forth in Section 201. 

        "Opinion of Counsel" means a written opinion of counsel, who may 
be an employee of or counsel for the Company, including an employee of the 
Company, and who shall be reasonably acceptable to the Trustee.

        "Outstanding", when used with respect to Notes, means, as of the 
date of determination, all Notes theretofore authenticated and delivered 
under this Indenture, except:

        (i)   Notes theretofore cancelled by the Trustee or delivered to 
        the Trustee for cancellation;


        (ii)  Notes, or portions thereof, for whose payment or redemption 
        money in the necessary amount has been theretofore deposited with the 
        Trustee or any Paying Agent (other than the Company) in trust or set 
        aside and segregated in trust by the Company (if the Company shall act 
        as its own Paying Agent) for the Holders of such Notes; provided that,
                                                                --------
        if such Notes are to be redeemed, notice of such redemption has been 
        duly given pursuant to this Indenture or provision therefor reasonably 
        satisfactory to the Trustee has been made; 

        (iii) Notes, except to the extent expressly provided in 
        Sections 1302 and 1303, with respect to which the Company has effected 
        defeasance and/or covenant defeasance as provided in Article Thirteen; 
        and

        (iv) Notes that have been paid pursuant to Section 306 or in 
        exchange for or in lieu of which other Notes have been authenticated 
        and delivered pursuant to this Indenture, other than any such Notes in 
        respect of which there shall have been presented to the Trustee proof 
        satisfactory to it that such Notes are held by a bona fide purchaser 
        in whose hands the Notes are valid obligations of the Company;

provided, however, that in determining whether the Holders of the 
- --------  -------
requisite principal amount at Stated Maturity of Outstanding Notes have
given any request, demand, authorization, direction, consent, notice or
waiver hereunder, and for the purpose of making the calculations 
required by TIA Section 313, Notes owned by the Company or any other
obligor upon the Notes or any Affiliate of the Company or such other 
obligor shall be disregarded and deemed not to be Outstanding, except 
that, in determining whether the Trustee shall be protected in making 
such calculation or in relying upon any such request, demand, 
authorization, direction, notice, consent or waiver, only Notes that 
the Trustee knows to be so owned shall be so disregarded.  Notes so 
owned that have been pledged in good faith may be regarded as 
Outstanding if the pledgee establishes to the satisfaction of the 
Trustee the pledgee's right so to act with respect to such Notes and 
that the pledgee is not the Company or any other obligor upon the Notes 
or any Affiliate of the Company or such other obligor.

        "Paying Agent" means any Person (including the Company acting as 
Paying Agent) authorized by the Company to pay the principal of (and 
premium, if any) or interest on any Notes on behalf of the Company.



        "Permitted Debt" means (a) Vendor Debt in an aggregate principal 
amount not to exceed $780.0 million outstanding at any one time; (b) Debt 
permitted to be borrowed under the Credit Agreement in an aggregate 
principal amount not to exceed $175.0 million outstanding at any time; (c) 
Telecommunications Assets Debt; (d) Debt under Interest Swap Obligations 
designed to protect against or manage the Company's or any of its 
Subsidiaries' exposure to fluctuations in interest rates, provided that such 
                                                          --------
obligations are related to payment obligations on other Permitted Debt, and 
Currency Hedging Obligations entered into in the ordinary course of business 
and designed to protect against or manage the Company's or any of its 
Subsidiaries' exposure to fluctuations in foreign currency exchange rates; 
(e) Debt of the Company to any of its Restricted Subsidiaries or Debt of a 
Restricted Subsidiary of the Company to the Company or to another Restricted 
Subsidiary of the Company (but only so long as such Debt is held by a Person 
who is the Company or such a Restricted Subsidiary); (f) Debt in respect of 
(1) letters of credit, bankers' acceptances or other similar instruments or 
obligations, issued in connection with liabilities incurred in the ordinary 
course of business (including those issued to governmental entities in 
connection with self-insurance under applicable workers' compensation 
statutes) or (2) surety, judgment, appeal, performance and other similar 
bonds, instruments or obligations provided in the ordinary course of 
business; (g) Debt represented by the Notes and the Senior Notes, any 
Guarantees in respect thereof, and any Debt arising by reason of any Lien 
granted to secure any of the foregoing Debt; (h) Debt arising from 
agreements providing for indemnification, adjustment of purchase price or 
similar obligations, or from Guarantees, or letters of credit, surety bonds 
or performance bonds securing any obligations of the Company or any of its 
Restricted Subsidiaries pursuant to such agreements, in any case incurred in 
connection with the disposition of any business, assets or Restricted 
Subsidiary of the Company, in a principal amount not to exceed the gross 
proceeds actually received by the Company or any Restricted Subsidiary in 
connection with such disposition; (i) Capital Lease Obligations in an 
aggregate principal amount outstanding at any time not to exceed $10.0 
million; (j) Debt in existence on the Issue Date; (k) Debt arising from the 
honoring of a check, draft or similar instrument of a Person drawn against 
insufficient funds, provided that such Debt is extinguished within five 
                    --------
Business Days of its incurrence; (l) Debt incurred (and refinancing of such 
Debt) not to exceed, at any one time outstanding, two times the aggregate 
Net Cash Proceeds received by the Company after the Issue Date from the 
issuance and sale of its Capital Stock (other than (1) Redeemable Capital 
Stock and (2) preferred stock that requires the accrual of dividends in cash 
prior to the Stated Maturity of the Notes) or Subordinated Stockholder Debt 
to a Person that is not a Subsidiary of the Company to the extent that such 
Net Cash Proceeds have not been used to make a Permitted Investment pursuant 
to clause (a) of the definition of "Permitted Investments", or to make a 
Restricted Payment pursuant to Section 1012, provided that such Debt does 
                                             --------
not mature prior to the Stated Maturity of the Notes and has an Average Life 
longer than the Notes; (m) any Debt incurred in connection with or given in 
exchange for the renewal, extension, substitution, refunding, defeasance, 
refinancing or replacement of any Debt referred to in clauses (c), (g), (j), 
(n), and (o) and not incurred in violation of this Indenture ("Refinancing 
Debt"), provided, however, that (1) the principal amount of such Refinancing 
        --------  -------
Debt shall not exceed the principal amount of the Debt so renewed, extended, 
substituted, refunded, defeased, refinanced or replaced (plus the premiums 
paid, and the expenses incurred, in connection therewith), (2) with respect 
to Refinancing Debt of any Debt, if the Average Life of the Debt being 
renewed, extended, substituted, refunded, defeased, refinanced or replaced 
is equal to or greater than the Average Life of the Notes, the Refinancing 
Debt shall have an Average Life equal to or greater than the Average Life of 
the Notes and shall not mature prior to the Stated Maturity of the Notes, 
and (3) with respect to Refinancing Debt of any Debt, such Refinancing Debt 
shall rank no more senior (including as a result of structural subordination 
of the Notes), and shall be at least as subordinated, in right of payment to 
the Notes as the Debt being renewed, extended, substituted, refunded, 
defeased, refinanced or replaced; (n) Debt incurred in connection with a 
prepayment or redemption of the Notes or the Senior Notes pursuant to a 
Change of Control), provided that the principal amount of such Debt does not 
                    --------
exceed 101% of the principal amount at Stated Maturity of the Notes or the 
principal amount of the Senior Notes, prepaid (plus the amount of reasonable 
expenses incurred in connection therewith) and that such Debt (i) has an 
Average Life to stated maturity equal to or greater than the remaining 
Average Life to Stated Maturity of the Notes and (ii) does not mature prior 
to the Stated Maturity of the Notes; (o) Debt incurred if after giving pro 
forma effect to the incurrence and application of the proceeds thereof, the 
Debt to Annualized EBITDA Ratio would not equal or exceed 5 to 1 in the case 
of any such incurrence; (p) Debt of the Company or any of its Restricted 
Subsidiaries arising by reason of the recharacterization of the sale of 
accounts receivable to an Accounts Receivable Subsidiary; and (q) 
Subordinated Stockholder Debt.

        For purposes of determining compliance with, and any particular 
amount of Debt under, Section 1010, Guarantees, Liens or obligations with 
respect to letters of credit supporting Debt shall be disregarded (x) if 
otherwise included in the determination of such particular amount, or (y) if 
incurred by the obligor on such Debt, to the extent that any such Guarantee, 
Lien or letter of credit secures the principal amount of such Debt.  For 
purposes of determining compliance with Section 1010, in the event that an 
item of Debt meets the criteria of more than one of the types of Debt 
described in this definition of Permitted Debt, the Company, in its sole 
discretion, shall classify such item of Debt and only be required to include 
the amount and type of such Debt in one of such clauses.

        For purposes of determining compliance with any Dollar-
denominated restriction on the incurrence of Debt denominated in a foreign 
currency, the Dollar-equivalent principal amount of such Debt incurred 
pursuant thereto shall be calculated based on the relevant currency exchange 
rate in effect on the date that such Debt was incurred, in the case of term 
debt, or first committed, in the case of revolving credit debt, provided 
                                                                --------
that (x) the Dollar-equivalent principal amount of any such Debt outstanding 
on the Issue Date shall be calculated based on the relevant currency 
exchange rate in effect on the Issue Date and (y) if such Debt is incurred 
to refinance other Debt denominated in a foreign currency, and such 
refinancing would cause the applicable Dollar-denominated restriction to be 
exceeded if calculated at the relevant currency exchange rate in effect on 
the date of such refinancing, such Dollar-denominated restriction shall be 
deemed not to have been exceeded so long as the principal amount of such 
refinancing Debt does not exceed the principal amount of such Debt being 
refinanced.  The principal amount of any Debt incurred to refinance other 
Debt, if incurred in a different currency from the Debt being refinanced, 
shall be calculated based on the currency exchange rate applicable to the 
currencies in which such respective Debt is denominated that is in effect on 
the date of such refinancing.

        Debt of any Person that is not a Restricted Subsidiary, which 
Debt is outstanding at the time such Person becomes a Restricted Subsidiary 
or is merged with or into or consolidated with the Company or a Restricted 
Subsidiary, shall be deemed to have been incurred at the time such Person 
becomes a Restricted Subsidiary or is merged with or into or consolidated 
with the Company or a Restricted Subsidiary, and Debt that is assumed at the 
time of the acquisition of any asset shall be deemed to have been incurred 
at the time of such acquisition.

        "Permitted Holder" means each of Microwave Services Inc., 
Digital Services Corporation, Nippon Telegraph and Telephone Corporation, 
Alex J. Mandl and their respective Affiliates on the Issue Date.


        "Permitted Investments" means (a) Investments in an aggregate 
amount not to exceed the sum of (i) Invested Capital, (ii) the Fair Market 
Value of Qualified Capital Stock of the Company, Redeemable Capital Stock of 
the Company, or Debt securities of the Company convertible into Qualified 
Capital Stock of the Company, in the latter two cases upon such redemption 
or conversion thereof into Qualified Capital Stock of the Company, issued by 
the Company or any Restricted Subsidiary of the Company as consideration for 
any such Investments made pursuant to this clause (a), and (iii) in the case 
of the disposition or repayment of any Investment made pursuant to this 
clause (a) after the Issue Date (including by redesignation of an 
Unrestricted Subsidiary of the Company to a Restricted Subsidiary of the 
Company), an amount equal to the lesser of the return of capital with 
respect to such Investment and the initial amount of such Investment, in 
either case, less the cost of the disposition of such Investment; (b) 
Permitted Temporary Investments; (c) Investments in assets used in the 
ordinary course of business; (d) Investments in any Person as a result of 
which such Person becomes a Restricted Subsidiary of the Company provided 
                                                                 --------
that such Restricted Subsidiary is engaged in a Telecommunications Business; 
(e) Investments in trade receivables, prepaid expenses, negotiable 
instruments held for collection and lease, utility and workers' 
compensation, performance and other similar deposits; (f) loans and advances 
to employees made in the ordinary course of business; (g) Interest Swap 
Obligations and Currency Hedge Obligations; (h) bonds, notes, debentures or 
other securities received as a result of Asset Sales permitted under Section 
1016; (i) Investments in existence at the Issue Date and any extension, 
modification or renewal of any such Investment that does not increase the 
amount of such Investment; (j) endorsements for collection or deposit in the 
ordinary course of business by such Person of bank drafts and similar 
negotiable instruments of such other Person received as payment for ordinary 
course of business trade receivables; (k) any Investment by a Restricted 
Subsidiary of the Company or any Investment by the Company or a Restricted 
Subsidiary of the Company in a Restricted Subsidiary of the Company; (l) 
Investments deemed to have been made as a result of the acquisition of a 
Person that at the time of such acquisition held instruments constituting 
Investments that were not acquired in contemplation of, or in connection 
with, the acquisition of such Person; and (m) Investments in or acquisitions 
of Capital Stock, Debt, securities or other property of Persons (other than 
Affiliates of the Company) received by the Company or any of its Restricted 
Subsidiaries in the bankruptcy or reorganization of or by such Person or any 
exchange of such Investment with the issuer thereof or taken in settlement 
of or other resolution of claims or disputes, and, in each case, extensions, 
modifications and renewals thereof.

        "Permitted Liens" means (a) Liens securing Vendor Debt and Debt 
incurred under the Credit Agreement, provided that such Debt was incurred in 
                                     --------
compliance with clauses (a) and (b), respectively, of the definition of 
Permitted Debt; (b) Liens securing Telecommunications Assets Debt; (c) Liens 
on property of a Person existing at the time such Person is merged with or 
into, or consolidated with, the Company or becomes a Restricted Subsidiary 
of the Company (and not incurred in anticipation of such transaction); 
provided that such Liens are not extended to the property and assets of the 
- --------
Company and its Restricted Subsidiaries, other than the acquired Restricted 
Subsidiary; (d) Liens existing as of the Issue Date; (e) Liens on property 
or assets acquired by the Company or any of its Restricted Subsidiaries, 
provided that such Liens were not incurred in connection with, or in 
- --------
contemplation of such acquisition and do not extend to any other property or 
assets; (f) Liens in respect of Interest Swap Obligations and Currency Hedge 
Obligations permitted under the Indenture; (g) Liens in favor of the Company 
or any of its Restricted Subsidiaries; (h) Liens securing the Notes and the 
Senior Notes, or any Guarantees thereof; (i) any interest or title of a 
lessor in the property subject to any Capitalized Lease Obligation or 
operating lease; (j) Liens securing reimbursement obligations with respect 
to letters of credit that encumber documents and other property relating to 
such letters of credit and the products and proceeds thereof; (k) Liens 
arising out of conditional sale, title retention, consignment or similar 
arrangements for the sale of goods entered into by the Company or any of its 
Restricted Subsidiaries in the ordinary course of business; (l) Liens on the 
property or assets or Capital Stock of Accounts Receivable Subsidiaries and 
Liens arising out of any sale of accounts receivable in the ordinary course 
(including in connection with a financing transaction) to or by an Accounts 
Receivable Subsidiary or to Persons that are not Affiliates of the Company; 
(m) Liens on the Pledged Securities in favor of the Senior Notes Trustee and 
the holders of the Senior Notes; and (n) any extension, renewal, 
refinancing, refunding or replacement of any Permitted Lien (or any 
arrangement to which such Permitted Lien relates), provided that such new 
                                                   --------
Lien, pledge or deposit is limited to the property or assets that secured 
(or under the arrangement under which the original Permitted Lien arose, 
could secure) the obligations to which such Liens relate.

        "Permitted Temporary Investments" means (a) all Eligible Cash 
Equivalents except that the term "not more than one year and one day after 
the date of acquisition" is changed to "not more than two years after the 
Issue Date" and (b) debt securities with an investment grade rating by 
Standard & Poor's Rating Services and Moody's Investors Service, Inc. issued 
by any Person and maturing within two years after the Issue Date.

        "Person" means any individual, corporation, partnership, joint 
venture, association, joint-stock company, trust, unincorporated 
organization, limited liability corporation or government or any agency or 
political subdivision thereof.

        "Physical Notes" has the meaning set forth in Section 201.

        "Pledged Securities" means the securities purchased by the 
Company with a portion of the net proceeds from the offering of the Senior 
Notes as set forth in the Offering Memorandum.

        "Predecessor Note" of any particular Note means every previous 
Note evidencing all or a portion of the same debt as that evidenced by such 
particular Note; and, for the purposes of this definition, any Note 
authenticated and delivered under Section 306 in exchange for a mutilated 
security or in lieu of a lost, destroyed or stolen Note shall be deemed to 
evidence the same debt as the mutilated, lost, destroyed or stolen Note.

        "Private Placement Legend" has the meaning set forth in Section 
202.

        "Proportionate Interest" in any issuance of Capital Stock of a 
Restricted Subsidiary means a ratio (i) the numerator of which is the 
aggregate amount of all Investments in Capital Stock of such Restricted 
Subsidiary by the Company and (ii) the denominator of which is the aggregate 
amount of all Investments in Capital Stock of such Restricted Subsidiary by 
all Persons.

        "Qualified Capital Stock" of any Person means a class of Capital 
Stock other than Redeemable Capital Stock.

        "QIB" means a "Qualified Institutional Buyer" within the meaning 
of Rule 144A under the Securities Act.

        "Redeemable Capital Stock" of any Person means any equity 
security of such Person that by its terms (or by the terms of any security 
into which it is convertible or for which it is exchangeable), or otherwise 
(including on the happening of an event), is required to be redeemed or is 
redeemable at the option of the holder thereof, in whole or in part 
(including by operation of a sinking fund), or is exchangeable for Debt 
(other than at the option of such Person), in whole or in part, at any time 
prior to the Stated Maturity of the Notes.

        "Redemption Date", when used with respect to any Note to be 
redeemed, in whole or in part, means the date fixed for such redemption by 
or pursuant to this Indenture and the terms of the Notes.


        "Redemption Price", when used with respect to any Note to be 
redeemed, means the price at which it is to be redeemed pursuant to this 
Indenture and the terms of the Notes.

        "Registration Rights Agreement" means the Registration Rights 
Agreement dated as of February 20, 1998 among the Company and the Initial 
Purchasers.

        "Registration Statement" means the Registration Statement as 
defined in the Registration Rights Agreement.

        "Regular Record Date", for the interest payable on any interest 
payment date, means the February 15 or August 15 (whether or not a Business 
Day), as the case may be, next preceding such interest payment date.

        "Regulation S" means Regulation S under the General Regulations 
of the Securities Act.

        "Replacement Assets" means, with respect to any Asset Sale, 
properties or assets that, as determined by the Board of Directors, as 
evidenced by a Board Resolution, are used or shall be used in the 
Telecommunications Business of the Company or a Restricted Subsidiary of the 
Company.

        "Responsible Officer", when used with respect to the Trustee, 
means the chairman or any vice-chairman of the board of directors, the 
chairman or any vice-chairman of the executive committee of the board of 
directors, the chairman of the trust committee, the president, any vice 
president, the secretary, any assistant secretary, the treasurer, any 
assistant treasurer, the cashier, any assistant cashier, any trust officer 
or assistant trust officer, the controller or any assistant controller or 
any other officer of the Trustee duly authorized and customarily performing 
functions similar to those performed by any of the above-designated 
officers, and also means, with respect to a particular corporate trust 
matter, any other duly authorized officer to whom such matter is referred 
because of his knowledge of and familiarity with the particular subject.


        "Restricted Payment" means (i) a dividend or other distribution 
declared and paid on the Capital Stock of the Company or to the Company's 
stockholders (in their capacity as such), or declared and paid to any Person 
other than the Company or a Restricted Subsidiary of the Company on the 
Capital Stock of any Restricted Subsidiary of the Company, in each case, 
other than dividends, distributions or payments made solely in Qualified 
Capital Stock of the Company or such Restricted Subsidiary (and other than 
pro rata dividends or distributions on Qualified Capital Stock of such 
Restricted Subsidiaries), (ii) a payment made by the Company or any of its 
Restricted Subsidiaries (other than a payment to the Company or any 
Restricted Subsidiary of the Company) to purchase, redeem, acquire or retire 
any Capital Stock of the Company or of a Restricted Subsidiary of the 
Company, (iii) a payment made by the Company or any of its Restricted 
Subsidiaries to redeem, repurchase, defease (including an in-substance or 
legal defeasance) or otherwise acquire or retire for value, prior to any 
scheduled maturity, scheduled sinking fund or mandatory redemption payment, 
any Subordinated Debt of the Company, (iv) an Investment in any Person, 
including an Unrestricted Subsidiary, other than (a) a Permitted Investment, 
(b) an Investment by the Company in a Restricted Subsidiary of the Company 
or (c) an Investment by a Restricted Subsidiary of the Company in the 
Company or a Restricted Subsidiary of the Company or (v) a payment of 
principal, interest or other payment on or in respect of Subordinated 
Stockholder Debt.  For calculation purposes upon any Person becoming a 
Restricted Subsidiary of the Company, no investments in that Person shall be 
considered to be Restricted Payments.

        "Restricted Subsidiary" of any Person means (i) any corporation 
other than an Unrestricted Subsidiary more than 50% of the outstanding 
shares of Voting Stock of which is owned or controlled, directly or 
indirectly, by such Person or (ii) any limited partnership other than an 
Unrestricted Subsidiary of which such Person or any Restricted Subsidiary of 
such Person is a general partner or (iii) any other Person (other than a 
corporation or limited partnership) other than an Unrestricted Subsidiary in 
which such Person, or one or more other Restricted Subsidiaries of such 
Person, or such Person and one or more other Restricted Subsidiaries 
thereof, directly or indirectly, have more than 50% of the outstanding 
partnership or similar interests or have the power, by contract or 
otherwise, to direct or cause the direction of the policies, management and 
affairs thereof.

        "Rule 144A" means Rule 144A under the General Regulations of the 
Securities Act.

        "Sale and Leaseback Transaction" means, with respect to any 
Person, any direct or indirect arrangement pursuant to which property is 
sold or transferred by such Person or a Restricted Subsidiary of such Person 
and is thereafter leased back from the purchaser or transferee thereof by 
such Person or one of its Restricted Subsidiaries.

        "Securities Act" means the Securities Act of 1933, as amended.

        "Senior Notes" has the meaning set forth in the recitals herein.

        "Senior Notes Indenture" means the indenture dated November 26, 
1997 by and between the Trustee and the Company governing the Senior Notes.


        "Senior Notes Trustee" means the Person named as the "Trustee" 
in the first paragraph of the Senior Notes Indenture until a successor 
Trustee shall have become such pursuant to the applicable provisions of the 
Senior Notes Indenture, and thereafter "Senior Notes Trustee" shall mean 
such successor Trustee.

        "Shelf Registration Statement" means the Shelf Registration 
Statement, as defined in the Registration Rights Agreement.

        "Significant Restricted Subsidiary" means a Restricted 
Subsidiary that is a "significant subsidiary" as defined in Rule 1-02(w) of 
Regulation S-X under the Securities Act and the Exchange Act, or that owns 
or holds a Federal Communications Commission license for the transmission of 
wireless telecommunications services.

        "Special Record Date" for the payment of any Defaulted Interest 
means a date fixed by the Trustee pursuant to Section 307.

        "Stated Maturity", when used with respect to a Note or any 
installment of interest thereon, means the date specified in such Note as 
the fixed date on which the principal of such Note or such installment of 
interest is due and payable.

        "Subordinated Debt" means Debt of the Company that is 
subordinated in right of payment to the Notes.

        "Subordinated Stockholder Debt" means Debt of the Company to a 
Permitted Holder, provided that, except to the extent expressly permitted by 
                  --------
Section 1012,  such Debt shall not (by its terms or by the terms of any 
security into which it is convertible or for which it is exchangeable) 
(including upon the happening of any event) pay principal, premium, if any, 
or interest (upon acceleration or otherwise) until the earlier of (a) six 
months after the Stated Maturity of the Notes and (b) the payment in full in 
cash of all the Notes and provided further that (i) such Debt shall be 
                          --------
subordinated to the Notes pursuant to the terms of a Subordinated Note in 
the form attached hereto and (ii) the Company shall have delivered one or 
more opinions of counsel in the form attached hereto as to the validity and 
enforceability of such Subordinated Note.

        "Subsidiary" means, with respect to any Person, (i) any 
corporation more than 50% of the outstanding shares of Voting Stock of which 
is owned, directly or indirectly, by such Person, or by one or more other 
Subsidiaries of such Person, or by such Person and one or more other 
Subsidiaries of such Person, (ii) any general partnership, joint venture or 
similar entity, more than 50% of the outstanding partnership or similar 
interests of which are owned, directly or indirectly, by such Person, or by 
one or more other Subsidiaries of such Person, or by such Person and one or 
more other Subsidiaries of such Person and (iii) any limited partnership of 
which such Person or any Subsidiary of such Person is a general partner.


        "Subsidiary Guarantee" means a Guarantee of the Notes or the 
Senior Notes, as the case may be, by a Restricted Subsidiary and required 
pursuant to Section [1014] hereof.

        "Subsidiary Guarantor" means a Restricted Subsidiary that has 
executed a Subsidiary Guarantee.

        "Telecommunications Assets" means all assets, rights 
(contractual or otherwise) and properties, whether tangible or intangible, 
used or useful in connection with a Telecommunications Business.

        "Telecommunications Assets Debt" means any Debt of the Company 
or any of its Restricted Subsidiaries to finance the acquisition, 
construction, expansion or development of Telecommunications Assets; 
provided that, at the time of incurrence, such Debt does not exceed 100% of 
- --------
the lesser of cost or Fair Market Value of the Telecommunications Assets to 
be so acquired, constructed, expanded or developed.

        "Telecommunications Business" means, when used in reference to 
any Person, that such Person is engaged primarily in the business of (i) 
transmitting or providing services relating to the transmission of voice, 
video or data through owned or leased transmission facilities, (ii) 
creating, developing or marketing communications related network equipment, 
software and other devices for use in a Telecommunications Business or (iii) 
evaluating, participating in or pursuing any other activity or opportunity 
that is related to those identified in (i) or (ii) above; provided that the 
                                                          --------
determination of what constitutes a Telecommunications Business shall be 
made in good faith by the Board of Directors of the Company.

        "Transactions" means (i) the acquisition by the Company of all 
of the outstanding stock of FirstMark Communications, Inc. pursuant to a 
stock contribution agreement dated as of March 10, 1997 among Teligent, 
L.L.C., FirstMark Communications, Inc. and the sole stockholder of FirstMark 
Communications, Inc., (ii) the capital contributions in an aggregate amount 
of $60 million to Teligent, L.L.C. by the original members of Teligent, 
L.L.C., (iii) the contribution of Associated Communications of Los Angeles 
to Teligent, L.L.C. by The Associated Group, Inc., (iv) the assignment of 
certain licenses held by certain of the Company's members or affiliates to 
the Company, (v) the grant by the Federal Communications Commission of 
pending applications to provide 24 GHz wireless services in Boston, MA and 
New York, NY, (vi) the investment by Nippon Telegraph and Telephone 
Corporation of $100.0 million in the Company pursuant to a securities 
purchase agreement dated September 30, 1997 between the Company and Nippon 
Telegraph and Telephone Corporation and (vii) the merger of Teligent, L.L.C. 
with and into the Company, with the Company surviving the merger.


        "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 
1939 as in effect from time to time.

        "Trustee" means the Person named as the "Trustee" in the first 
paragraph of this Indenture until a successor Trustee shall have become such 
pursuant to the applicable provisions of this Indenture, and thereafter 
"Trustee" shall mean such successor Trustee.

        "U.S. Global Note" has the meaning set forth in Section 201.

        "U.S. Government Obligations" means (x) securities that are (i) 
direct obligations of the United States of America for the payment of which 
the full faith and credit of the United States of America is pledged or (ii) 
obligations of a Person controlled or supervised by and acting as an agency 
or instrumentality of the United States of America the payment of which is 
unconditionally guaranteed as a full faith and credit obligation by the 
United States of America, which securities, in either case under clause (i) 
or (ii) above, are not callable or redeemable at the option of the issuer 
thereof, and (y) depository receipts issued by a bank (as defined in Section 
3(a)(2) of the Securities Act) as custodian with respect to any U.S. 
Government Obligation that is specified in clause (x) above and held by such 
bank for the account of the holder of such depository receipt, or with 
respect to any specific payment of principal or interest on any U.S. 
Government Obligation that is so specified and held, provided that (except 
                                                     --------
as required by law) such custodian is not authorized to make any deduction 
from the amount payable to the holder of such depository receipt from any 
amount received by the custodian in respect of the U.S. Government 
Obligation or the specific payment of principal or interest of the U.S. 
Government Obligation evidenced by such depository receipt.

        "U.S. Physical Note" has the meaning set forth in Section 201.

        "Unrestricted Subsidiary" means (i) any Subsidiary of the 
Company (a) that at the time of determination shall be an Unrestricted 
Subsidiary (as designated by the Board of Directors of the Company, as 
provided below), (b) that shall be engaged in the same or similar line of 
business as the Company and its Restricted Subsidiaries, and (c) all the 
Debt of which shall be non-recourse to the Company and its Subsidiaries 
other than its Unrestricted Subsidiaries and (ii) any Subsidiary of an 
Unrestricted Subsidiary; provided that notwithstanding clause (i)(c) above, 
                         --------
the Company or a Restricted Subsidiary of the Company may Guarantee, 
endorse, agree to provide funds for the payment or maintenance of, or 
otherwise become directly or indirectly liable with respect to, Debt of an 
Unrestricted Subsidiary but only to the extent that the Company or such 
Restricted Subsidiary could make an Investment in such Unrestricted 
Subsidiary pursuant to Section 1012 and any such Guarantee, endorsement or 
agreement shall be deemed an incurrence of Debt by the Company for purposes 
of Section 1010.  The Board of Directors of the Company may designate any 
newly acquired or newly formed Subsidiary to be an Unrestricted Subsidiary 
unless such Subsidiary owns any capital stock of, or owns or holds any Lien 
on any property of, any other Subsidiary of the Company that is not an 
Unrestricted Subsidiary (other than an Subsidiary of the type referred to in 
clause (ii) above).  Any such designation by the Board of Directors of the 
Company shall be evidenced to the Trustee by filing with the Trustee a 
certified copy of the Board Resolution giving effect to such designation and 
an Officers' Certificate certifying that such designation complied with the 
foregoing conditions.  The Company's Board of Directors may designate any 
Unrestricted Subsidiary to be a Restricted Subsidiary (a "Revocation"); 
provided, however, that immediately after giving effect to such designation, 
- --------  -------
no Default or Event of Default shall have occurred and be continuing, 
including, without limitation, under Sections 1010 and 1011, assuming the 
incurrence by the Company and its Restricted Subsidiaries at the time of 
such designation of all existing Debt and Liens of the Unrestricted 
Subsidiary to be so designated as a Restricted Subsidiary of the Company.

        "Vendor Debt" means any Debt incurred (x) pursuant to the 
facility contemplated by the Financing Commitment Letter and/or the 
Arrangement Commitment Letter or (y) pursuant to any agreement with one or 
more other vendors, suppliers or lessors of equipment (including any 
facility entered into with any vendor, supplier or lessor or any financial 
institution acting on behalf of any vendor, supplier or lessor as such 
agreement may be amended, modified, supplemented, refunded, refinanced, 
restructured, renewed or replaced from time to time (whether in whole or in 
part, whether with the original agent or lenders or other agents or lenders 
and whether provided under the original agreement or otherwise).

        "Vice President", when used with respect to the Company or the 
Trustee, means any vice president, whether or not designated by a number or 
a word or words added before or after the title "vice president".

        "Voting Stock" means, with respect to any Person, securities of 
any class or classes of Capital Stock in such Person entitling the holders 
thereof (whether at all times or at the times that such class of Capital 
Stock has voting power by reason of the happening of any contingency) to 
vote in the election of members of the board of directors or comparable body 
of such Person.

        SECTION 102.  Compliance Certificates and Opinions.
                      ------------------------------------

        Upon any application or request by the Company to the Trustee to 
take any action under any provision of this Indenture, the Company shall 
furnish to the Trustee an Officers' Certificate stating that all conditions 
precedent, if any, provided for in this Indenture (including any covenant 
compliance with which constitutes a condition precedent) relating to the 
proposed action have been complied with and an Opinion of Counsel stating 
that in the opinion of such counsel all such conditions precedent, if any, 
have been complied with, except that in the case of any such application or 
request as to which the furnishing of such documents is specifically 
required by any provision of this Indenture relating to such particular 
application or request, no additional certificate or opinion need be 
furnished.

        Every certificate or opinion with respect to compliance with a 
condition or covenant provided for in this Indenture (other than pursuant to 
Section 1008(a)) shall include:

        (1)  a statement that each individual signing such certificate or 
        opinion has read such covenant or condition and the definitions herein 
        relating thereto;

        (2)  a brief statement as to the nature and scope of the 
        examination or investigation upon which the statements or opinions 
        contained in such certificate or opinion are based;

        (3)  a statement that, in the opinion of each such individual, he 
        has made such examination or investigation as is necessary to enable 
        him to express an informed opinion as to whether or not such covenant 
        or condition has been complied with; and

        (4)  a statement as to whether, in the opinion of each such 
        individual, such condition or covenant has been complied with.

        SECTION 103.  Form of Documents Delivered to Trustee.
                      --------------------------------------
        In any case where several matters are required to be certified 
by, or covered by an opinion of, any specified Person, it is not necessary 
that all such matters be certified by, or covered by the opinion of, only 
one such Person, or that they be so certified or covered by only one 
document, but one such Person may certify or give an opinion with respect to 
some matters and one or more other such Persons as to other matters, and any 
such Person may certify or give an opinion as to such matters in one or 
several documents.

        Any certificate or opinion of an officer of the Company may be 
based, insofar as it relates to legal matters, upon a certificate or opinion 
of, or representations by, counsel, unless such officer knows that the 
certificate or opinion or representations with respect to the matters upon 
which his certificate or opinion is based are erroneous.  Any such 
certificate or Opinion of Counsel may be based, insofar as it relates to 
factual matters, upon (x) a certificate or opinion of, or representations 
by, an officer or officers of the Company stating that the information with 
respect to such factual matters is in the possession of the Company, unless 
such counsel knows that the certificate or opinion or representations with 
respect to such matters are erroneous or (y) one or more certificates of 
public officials.


        Where any Person is required to make, give or execute two or 
more applications, requests, consents, certificates, statements, opinions or 
other instruments under this Indenture, they may, but need not, be 
consolidated and form one instrument.

        SECTION 104.  Acts of Holders.
                      ---------------
        (a)  Any request, demand, authorization, direction, notice, 
consent, waiver or other action provided by this Indenture to be given or 
taken by Holders may be embodied in and evidenced by one or more instruments 
of substantially similar tenor signed by such Holders in person or by agents 
duly appointed in writing; and, except as herein otherwise expressly 
provided, such action shall become effective when such instrument or 
instruments are delivered to the Trustee and, where it is hereby expressly 
required, to the Company.  Such instrument or instruments (and the action 
embodied therein and evidenced thereby) are herein sometimes referred to as 
the "Act" of the Holders signing such instrument or instruments.  Proof of 
execution of any such instrument or of a writing appointing any such agent 
shall be sufficient for any purpose of this Indenture and conclusive in 
favor of the Trustee and the Company, if made in the manner provided in this 
Section.

        (b)  The fact and date of the execution by any Person of any such 
instrument or writing may be proved by the affidavit of a witness of such 
execution or by a certificate of a notary public or other officer authorized 
by law to take acknowledgments of deeds, certifying that the individual 
signing such instrument or writing acknowledged to him the execution 
thereof.  Where such execution is by a signer acting in a capacity other 
than his individual capacity, such certificate or affidavit shall also 
constitute sufficient proof of authority.  The fact and date of the 
execution of any such instrument or writing, or the authority of the Person 
executing the same, may also be proved in any other manner that the Trustee 
deems sufficient.

        (c)  The principal amount and serial numbers of Notes held by any 
Person, and the date of holding the same, shall be proved by the Note 
Register.


        (d)  If the Company shall solicit from the Holders of Notes any 
request, demand, authorization, direction, notice, consent, waiver or other 
Act, the Company may, at its option, by or pursuant to a Board Resolution, 
fix in advance a record date for the determination of Holders entitled to 
give such request, demand, authorization, direction, notice, consent, waiver 
or other Act, but the Company shall have no obligation to do so.  
Notwithstanding TIA Section 316(c), such record date shall be the record 
date specified in or pursuant to such Board Resolution, which shall be a 
date not earlier than the date 30 days prior to the first solicitation of 
Holders generally in connection therewith and not later than the date such 
solicitation is completed.  If such a record date is fixed, such request, 
demand, authorization, direction, notice, consent, waiver or other Act may 
be given before or after such record date, but only the Holders of record at 
the close of business on such record date shall be deemed to be Holders for 
the purposes of determining whether Holders of the requisite proportion of 
Outstanding Notes have authorized or agreed or consented to such request, 
demand, authorization, direction, notice, consent, waiver or other Act, and 
for that purpose the Outstanding Notes shall be computed as of such record 
date; provided that no such authorization, agreement or consent by the 
Holders on such record date shall be deemed effective unless it shall become 
effective pursuant to the provisions of this Indenture not later than eleven 
months after the record date.

        (e)  Any request, demand, authorization, direction, notice, 
consent, waiver or other Act of the Holder of any Note shall bind every 
future Holder of the same Note and the Holder of every Note issued upon the 
registration of transfer thereof or in exchange therefor or in lieu thereof 
in respect of anything done, omitted or suffered to be done by the Trustee, 
any Paying Agent or the Company in reliance thereon, whether or not notation 
of such action is made upon such Note.

        SECTION 105.  Notices, Etc., to Trustee and Company.
                      -------------------------------------
        Any request, demand, authorization, direction, notice, consent, 
waiver or Act of Holders or other document provided or permitted by this 
Indenture to be made upon, given or furnished to, or filed with,

        (1)  the Trustee by any Holder or by the Company shall be 
   sufficient for every purpose hereunder if made, given, furnished or 
   filed in writing to or with the Trustee at its Corporate Trust Office, 
   Attention:  Corporate Trust Department, or

        (2)  the Company by the Trustee or by any Holder shall be 
   sufficient for every purpose hereunder (unless otherwise herein 
   expressly provided) if in writing and mailed, first-class postage 
   prepaid, to the Company addressed to it at the address of its 
   principal office specified in the first paragraph of this Indenture, 
   or at any other address previously furnished in writing to the Trustee 
   by the Company.

        SECTION 106.  Notice to Holders; Waiver.
                      -------------------------

        Where this Indenture provides for notice of any event to Holders 
by the Company or the Trustee, such notice shall be sufficiently given 
(unless otherwise herein expressly provided) if in writing and mailed, 
first-class postage prepaid, to each Holder affected by such event, at his 
address as it appears in the Note Register, not later than the latest date, 
and not earlier than the earliest date, prescribed for the giving of such 
notice.  In any case where notice to Holders is given by mail, neither the 
failure to mail such notice, nor any defect in any notice so mailed, to any 
particular Holder shall affect the sufficiency of such notice with respect 
to other Holders.  Any notice mailed to a Holder in the manner herein 
prescribed shall be conclusively deemed to have been received by such 
Holder, whether or not such Holder actually receives such notice.  Where 
this Indenture provides for notice in any manner, such notice may be waived 
in writing by the Person entitled to receive such notice, either before or 
after the event, and such waiver shall be the equivalent of such notice.  
Waivers of notice by Holders shall be filed with the Trustee, but such 
filing shall not be a condition precedent to the validity of any action 
taken in reliance upon such waiver.

        In case by reason of the suspension of or irregularities in 
regular mail service or by reason of any other cause, it shall be 
impracticable to mail notice of any event to Holders when such notice is 
required to be given pursuant to any provision of this Indenture, then any 
manner of giving such notice as shall be satisfactory to the Trustee shall 
be deemed to be a sufficient giving of such notice for every purpose 
hereunder.

        SECTION 107.  Effect of Headings, Table of Contents and Recitals.
                      --------------------------------------------------

        The Article and Section headings herein, the Table of Contents 
and the Recitals are for convenience only and shall not affect the 
construction hereof.

        SECTION 108.  Successors and Assigns.
                      ----------------------

        All covenants and agreements in this Indenture by the Company 
and the Trustee shall bind their respective successors and assigns, whether 
so expressed or not.

        SECTION 109.  Separability Clause.
                      -------------------

        In case any provision in this Indenture or in the Notes shall be 
invalid, illegal or unenforceable, the validity, legality and enforceability 
of the remaining provisions shall not in any way be affected or impaired 
thereby.

        SECTION 110.  Benefits of Indenture.
                      --------------------- 

        Nothing in this Indenture or in the Notes, express or implied, 
shall give to any Person, (other than the parties hereto, any Paying Agent, 
any Notes Registrar and their successors hereunder, and the Holders) any 
benefit or any legal or equitable right, remedy or claim under this 
Indenture.

        SECTION 111.  Governing Law.
                      -------------

        This Indenture and the Notes shall be governed by and construed 
in accordance with the law of the State of New York (without giving effect 
to the conflict of laws principles thereof).  The Trustee, the Company, and 
(by their acceptance of the Notes) the Holders, agree to submit to the non-
exclusive jurisdiction of any United States federal or state court located 
in the Borough of Manhattan, in the City of New York in any action or 
proceeding arising out of or relating to this Indenture or the Notes.  Upon 
the effectiveness of the Shelf Registration Statement or the consummation of 
the Exchange Offer, this Indenture will be subject to the provisions of the 
Trust Indenture Act that are required to be part of this Indenture and 
shall, to the extent applicable, be governed by such provisions.

        SECTION 112.  Legal Holidays.
                      --------------

        In any case where any Interest Payment Date, date established 
for the payment of defaulted interest, Redemption Date, Change of Control 
Payment Date, Asset Sale Offer Purchase Date or Stated Maturity or Maturity 
of any Note shall not be a Business Day, then (notwithstanding any other 
provision of this Indenture or of the Notes) payment of principal (or 
premium, if any) or interest need not be made on such date, but may be made 
on the next succeeding Business Day with the same force and effect as if 
made on the Interest Payment Date, date established for the payment of 
defaulted interest, Redemption Date, Change of Control Payment Date, Asset 
Sale Offer Purchase Date or at the Stated Maturity or Maturity; provided 
                                                                --------
that no interest shall accrue for the period from and after such Interest 
Payment Date, date established for the payment of defaulted interest, 
Redemption Date, Change of Control Payment Date, Asset Sale Offer Purchase 
Date, Stated Maturity or Maturity, as the case may be.

        SECTION 113.  No Recourse Against Others.
                      --------------------------

        No recourse for the payment of the principal of, or premium, if 
any, or interest on, any of the Notes or for any claim based thereon or 
otherwise in respect thereof, and no recourse under or upon any obligation, 
covenant or agreement of the Company in this Indenture or in any of the 
Notes, or because of the creation of any Debt represented thereby, shall be 
had against any incorporator, stockholder, officer, director, employee, 
controlling person of the Company or of a Subsidiary of the Company or of 
any successor Person of the Company or of a Subsidiary of the Company.  Each 
Holder by accepting a Note waives and releases all such liability, and such 
waiver and release is part of the consideration for the issuance of the 
Notes.

        SECTION 114.  Exhibits and Schedules.
                      ----------------------

        All exhibits and schedules attached hereto are by this reference 
made a part hereof with the same effect as if herein set forth in full.

        SECTION 115.  Counterparts.
                      ------------

        This Indenture may be executed in any number of counterparts, 
each of which shall be an original; but such counterparts shall together 
constitute but one and the same instrument.

        SECTION 116.  Duplicate Originals.
                      -------------------

        The parties may sign any number of copies of this Indenture.  
Each signed copy shall be an original, but all of them together represent 
the same agreement.

        SECTION 117.  Incorporation by Reference of TIA.
                      ---------------------------------

        Whenever this Indenture refers to a provision of the TIA, the 
provision is incorporated by reference in, and made a part of, this 
Indenture.  Any terms incorporated by reference in this Indenture that are 
defined by the TIA, defined by TIA reference to another statute or defined 
by Commission rule under the TIA, have the meanings so assigned to them 
therein.


                                    ARTICLE TWO

                                    NOTES FORMS

        SECTION 201.  Forms Generally.
                      ---------------

        The Initial Notes shall be known as the "11 1/2% Senior Discount 
Notes due 2008" and the Exchange Notes shall be known as the "11 1/2% Series B 
Senior Discount Notes due 2008", in each case, of the Company.  The Notes 
and the Trustee's certificate of authentication shall be in substantially 
the forms set forth in this Article, with such appropriate insertions, 
omissions, substitutions and other variations as are required or permitted 
by this Indenture, and may have such letters, numbers or other marks of 
identification and such legends or endorsements placed thereon as may be 
required to comply with the rules of any securities exchange, law, 
governmental rule or regulation, depository rule or usage, or other 
customary usage or as may, consistently herewith, be determined by the 
officers executing such Notes, as evidenced by their execution of the Notes.  
Any portion of the text of any Note may be set forth on the reverse thereof, 
with an appropriate reference thereto on the face of the Note.  Each Note 
shall be dated the date of its authentication.

        The definitive Notes shall be printed, lithographed or engraved 
on steel-engraved borders or may be produced in any other manner, all as 
determined by the officers of the Company executing such Notes, as evidenced 
by their execution of such Notes.


        Initial Notes offered and sold in reliance on Rule 144A under 
the Securities Act shall be issued initially in the form of one or more 
permanent global Notes in substantially the form set forth herein and 
contain each of the legends set forth in Section 203 (collectively the "U.S. 
Global Notes"), registered in the name of the nominee of the Depositary, 
deposited with the Trustee, as custodian for the Depositary or its nominee, 
duly executed by the Company and authenticated by the Trustee as hereinafter 
provided.  The aggregate principal amount of the U.S. Global Note may from 
time to time be increased or decreased by adjustments made on the records of 
the Trustee, as custodian for the Depositary or its nominee, as hereinafter 
provided.

        Initial Notes offered and sold in offshore transactions in 
reliance on Regulation S under the Securities Act shall be issued initially 
in the form of a single global Note in substantially the form set forth in 
Exhibit A and contain each of the legends set forth in Section 203 (the 
"Offshore Global Note"), registered in the name of the nominee of the 
Depositary, deposited with the Trustee, as custodian for the Depositary or 
its nominee, duly executed by the Company and authenticated by the Trustee 
as hereinafter provided.  The aggregate principal amount of the Offshore 
Global Note may from time to time be increased or decreased by adjustments 
made in the records of the Trustee, as custodian for the Depositary or its 
nominee, as herein provided.  Initial Notes issued pursuant to Section 305 
in exchange for or upon transfer of beneficial interests in the U.S. Global 
Note or the Offshore Global Note shall be in the form of permanent 
certificated Notes substantially in the form set forth herein (the "U.S. 
Physical Notes" and the "Offshore Physical Notes" respectively), as 
hereinafter provided.

        The Offshore Physical Notes and U.S. Physical Notes are 
sometimes collectively herein referred to as the "Physical Notes."  The U.S. 
Global Note and the Offshore Global Note are sometimes collectively referred 
to as the "Global Notes."

        SECTION 202.  Restrictive Legends.

        Unless and until the earlier of (A) the date which is two years 
(or such shorter period of time as permitted by rule 144 under the 
Securities Act and any successor provision thereunder) after the later of 
the original issue date of the Initial Notes or the last day on which the 
company or any affiliate of the company was the owner of an Initial Note or 
(B) the date that (i) an Initial Note is sold pursuant to an effective Shelf 
Registration Statement or (ii) an Initial Note is exchanged for an Exchange 
Note in an Exchange Offer pursuant to an effective Exchange Offer 
Registration Statement, in each case pursuant to the Registration Rights 
Agreement, (x) each U.S. Global Note and U.S. Physical Note shall bear the 
following legend set forth below (the "Private Placement Legend") on the 
face thereof and (y) the Offshore Physical Notes and the Offshore Global 
Note shall bear the Private Placement Legend:



   THE SECURITIES EVIDENCED HEREBY HAVE NOT BEEN REGISTERED UNDER THE 
   SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY 
   STATE OR OTHER SECURITIES LAWS.  NEITHER THIS SECURITY NOR ANY 
   INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, 
   TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE 
   ABSENCE OF SUCH REGISTRATION OR UNLESS THE TRANSACTION IS EXEMPT FROM, 
   OR NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES 
   ACT.  THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF (1) 
   REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS 
   DEFINED IN RULE 144A UNDER THE SECURITIES ACT ("RULE 144A")) OR (B) IT 
   IS NOT A U.S. PERSON AND IS ACQUIRING THIS SECURITY IN AN "OFFSHORE 
   TRANSACTION" PURSUANT TO RULE 903 OR 904 OF REGULATION S, (2) AGREES 
   THAT IT WILL NOT PRIOR TO (X) THE DATE WHICH IS TWO YEARS (OR SUCH 
   SHORTER PERIOD OF TIME AS PERMITTED BY RULE 144 UNDER THE SECURITIES 
   ACT AND ANY SUCCESSOR PROVISION THEREUNDER) AFTER THE LATER OF THE 
   ORIGINAL ISSUE DATE HEREOF (OR OF ANY PREDECESSOR OF THIS SECURITY) OR 
   THE LAST DAY ON WHICH THE COMPANY OR ANY AFFILIATE OF THE COMPANY WAS 
   THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF THIS SECURITY) AND 
   (Y) SUCH LATER DATE, IF ANY, AS MAY BE REQUIRED BY APPLICABLE LAWS 
   (THE "RESALE RESTRICTION TERMINATION DATE"), OFFER, SELL OR OTHERWISE 
   TRANSFER THIS SECURITY EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY 
   THEREOF, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN 
   DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THE 
   SECURITIES ARE ELIGIBLE FOR RESALE PURSUANT TO RULE 144A INSIDE THE 
   UNITED STATES, TO A PERSON IT REASONABLY BELIEVES IS A "QUALIFIED 
   INSTITUTIONAL BUYER" AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS 
   OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO 
   WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON 
   RULE 144A, (D) PURSUANT TO OFFERS AND SALES TO NON-U.S. PERSONS THAT 
   OCCUR OUTSIDE THE UNITED STATES WITHIN THE MEANING OF REGULATION S 
   UNDER THE SECURITIES ACT, PURSUANT TO RULE 904 OF REGULATION S, OR 
   (E) PURSUANT TO ANOTHER AVAILABLE EXEMPTION FROM THE REGISTRATION 
   REQUIREMENTS OF THE SECURITIES ACT AND (3) AGREES THAT IT WILL GIVE TO 
   EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE 
   SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND; PROVIDED THAT THE COMPANY, 
   THE TRUSTEE, THE TRANSFER AGENT AND THE REGISTRAR SHALL HAVE THE RIGHT 
   PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER (I) PURSUANT TO CLAUSE (D) 
   OR (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION 
   AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND (II) IN 
   EACH OF THE FOREGOING CASES, TO REQUIRE THAT A CERTIFICATION OF 
   TRANSFER IN THE FORM APPEARING ON THE OTHER SIDE OF THIS SECURITY IS 
   COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE TRUSTEE.  THIS LEGEND 
   WILL BE REMOVED UPON THE REQUEST OF THE HOLDER AFTER THE RESALE 
   RESTRICTION TERMINATION DATE.  AS USED HEREIN, THE TERMS "OFFSHORE 
   TRANSACTION", "UNITED STATES" AND "U.S. PERSON" HAVE THE RESPECTIVE 
   MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.

        Each Global Note, whether or not an Initial Note, shall also 
bear the following legend on the face thereof:

   UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE 
   OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO 
   THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR 
   PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE 
   & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED 
   REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO 
   SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF 
   DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE 
   BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER 
   HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

   TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN 
   WHOLE, BUT NOT IN PART, TO NOMINEES OF CEDE & CO. OR TO A SUCCESSOR 
   THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS 
   GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH 
   THE RESTRICTIONS SET FORTH IN SECTIONS 311 AND 312 OF THE INDENTURE 
   DATED AS OF FEBRUARY 20, 1998 BETWEEN THE COMPANY AND FIRST UNION 
   NATIONAL BANK AS TRUSTEE.

        SECTION 203.  Form of Face of Note and Exchange Note.
                      --------------------------------------
                                 TELIGENT, INC

               [Series B]* 11 1/2%  Senior Discount Notes due 2008

No. _____                                                  $__________

                                                         CUSIP No.____


        Teligent, Inc., a Delaware corporation (herein called the 
"Company", which term includes any successor Person under the Indenture 
hereinafter referred to), for value received, hereby promises to pay to CEDE 
& CO., or its registered assigns, the principal sum of __________ Dollars on 

- ----------------------------
*    Include only for Exchange Notes

March 1, 2008 at the office or agency of the Company referred to below, and 
to pay interest thereon on March 1, 2003 and semi-annually thereafter, on 
March 1 and September 1 in each year, from March 1, 2003, or from the most 
recent Interest Payment Date to which interest has been paid or duly 
provided for, at the rate of 11 1/2% per annum, until the principal hereof is 
paid or duly provided for, and (to the extent lawful) to pay on demand 
interest on any overdue interest at the rate borne by the Notes from the 
date on which such overdue interest becomes payable to the date on which 
payment of such interest has been made or duly provided for.  The principal 
of this Note shall not accrue interest until March 1, 2003 except in the 
case of a default in payment of the amount due at Stated Maturity, in which 
case the amount due on this Note shall bear interest at the rate borne by 
the Notes (to the extent that the payment of such interest shall be legally 
enforceable), which shall accrue from the date of such default to the date 
the payment of such amount has been made or duly provided for.  The interest 
so payable, and punctually paid or duly provided for, on any Interest 
Payment Date will, as provided in such Indenture, be paid to the Person in 
whose name this Note (or one or more Predecessor Notes) is registered at the 
close of business on the Regular Record Date for such interest, which shall 
be the February 15 or August 15 (whether or not a Business Day), as the case 
may be, next preceding such Interest Payment Date.  Any such interest not so 
punctually paid or duly provided for shall forthwith cease to be payable to 
the Holder on such Regular Record Date, and such defaulted interest, and (to 
the extent lawful) interest on such defaulted interest at the rate borne by 
the Notes, may be paid to the Person in whose name this Note (or one or more 
Predecessor Notes) is registered at the close of business on a Special 
Record Date for the payment of such Defaulted Interest to be fixed by the 
Trustee, notice whereof shall be given to Holders of Notes not less than 10 
days prior to such Special Record Date, or may be paid at any time in any 
other lawful manner not inconsistent with the requirements of any securities 
exchange on which the Notes may be listed, and upon such notice as may be 
required by such exchange, all as more fully provided in said Indenture.  
Payment of the principal of (and premium, if any, on) and interest on this 
Note will be made at the office or agency of the Company maintained for that 
purpose in The City of New York, or at such other office or agency of the 
Company as may be maintained for such purpose, in such coin or currency of 
the United States of America as at the time of payment is legal tender for 
payment of public and private debts; provided, however, that payment of 
                                     --------  -------
interest may be made at the option of the Company (i) by check mailed to the 
address of the Person entitled thereto as such address shall appear on the 
Note Register or (ii) by transfer to an account maintained by the payee 
located in the United States.

        The following information is supplied for purposes of 
Sections 1273 and 1275 of the Internal Revenue Code:

Issue Date:  February 20, 1998        Original issue discount under 
                                      Section 1273
                                      of the Internal Revenue Code 
                                      (for each $1,000 principal 
                                      amount at maturity):  $1005.22

Issue Price (for each $1,000          Yield to Maturity:  11 1/2%
   Principal amount at 
   maturity):  $569.78

        Reference is hereby made to the further provisions of this Note 
set forth on the reverse hereof, which further provisions shall for all 
purposes have the same effect as if set forth at this place.

        Unless the certificate of authentication hereon has been duly 
executed by the Trustee referred to on the reverse hereof by manual 
signature, this Note shall not be entitled to any benefit under the 
Indenture, or be valid or obligatory for any purpose.

        IN WITNESS WHEREOF, the Company has caused this instrument to be 
duly executed.

Dated:              1998                      TELIGENT, INC.
        ------- ---,


                                               By
                                                 ---------------------
Attest:                                    Title:



Authorized Signature


        SECTION 204.  Form of Reverse of Note.
                      -----------------------

        This Note is one of a duly authorized issue of securities of the 
Company designated as its 11 1/2% [Series B]* Senior Discount Notes due 2008 

- ----------------------
 *  Include only for Exchange Notes

(herein called the "Notes"), limited (except as otherwise provided in the 
Indenture referred to below) in aggregate principal amount at maturity to 
$440,000,000, that may be issued under a Senior Discount Notes Indenture 
(herein called the "Indenture") dated as of February 20, 1998 between the 
Company and First Union National Bank, as trustee (herein called the 
"Trustee", which term includes any successor trustee under the Indenture), 
to which Indenture and all indentures supplemental thereto reference is 
hereby made for a statement of the respective rights, limitations of rights, 
duties, obligations and immunities thereunder of the Company, the Trustee 
and the Holders of the Notes, and of the terms upon which the Notes are, and 
are to be, authenticated and delivered.

        The Notes are subject to redemption, upon not less than 30 nor 
more than 60 days' notice, at any time on or after March 1, 2003, as a whole 
or in part, at the election of the Company, at a Redemption Price equal to 
the percentage of the principal amount at Stated Maturity set forth below if 
redeemed during the 12-month period beginning March 1 of the years indicated 
below, together in each case with accrued and unpaid interest, if any, to 
the Redemption Date, all as provided in the Indenture:

     Year..............................      Redemption Price
                                             ---------------
     2003 .............................           105.750%
     2004 .............................           103.833%
     2005 .............................           101.917%
     2006 and thereafter ..............               100%

        Upon the occurrence of a Change of Control, the Holder of this 
Note may require the Company, subject to certain limitations provided in the 
Indenture, to repurchase this Note at a purchase price in cash in an amount 
equal to (i) 101% of the Accreted Value of this Note as of the Change of 
Control Payment Date, if such Change of Control Payment Date occurs prior to 
March 1, 2003, or (ii) 101% of the principal amount at Stated Maturity of 
this Note as of the Change of Control Payment Date, if such Change of 
Control Payment Date occurs on or after March 1, 2003, plus accrued and 
unpaid interest, if any, to such Change of Control Payment Date.


        [The Holder of this Note is entitled to the benefits of the 
Registration Rights Agreement, dated February 20, 1998, among the Company 
and the Initial Purchasers named therein (the "Registration Rights 
Agreement").  In the event that either (a) the Exchange Offer Registration 
Statement (as such term is defined in the Registration Rights Agreement) is 
not filed with the Securities and Exchange Commission on or prior to the 
90th calendar day following the date of original issue of the Notes, (b) the 
Exchange Offer Registration Statement (as such term is defined in the 
Registration Rights Agreement) has not been declared effective on or prior 
to the 150th calendar day following the date of original issue of the Notes 
or (c) the Exchange Offer is not consummated or a Shelf Registration 
Statement (as such terms are defined in the Registration Rights Agreement) 
is not declared effective on or prior to the 180th calendar day following 
the date of original issue of the Notes, cash interest ("Additional 
Interest") will accrue and become payable on this Note (in addition to the 
accrual of original issue discount on this Note) at a rate per annum equal 
to one-quarter of one percent of the Accreted Value of the Note following 
such 90-day period in the case of (a) above, following such 150-day period 
in the case of (b) above or following such 180-day period in the case of 
(c) above, which rate will be increased by an additional 0.25% per annum for 
each 90-day period that any additional interest continues to accrue; 
provided that the aggregate increase in such annual interest rate shall in 
- --------
no event exceed 1%.  Such Additional Interest shall become payable 
semiannually on each March 1 and September 1, as applicable, following the 
periods set forth in clause (i), (ii) or (iii) above.  Upon (x) the filing 
of the Exchange Offer Registration Statement after the 90-day period 
described in clause (a) above, (y) the effectiveness of the Exchange Offer 
Registration Statement after the 150-day period described in clause (b) 
above or (z) the consummation of the Exchange Offer or the effectiveness of 
a Shelf Registration Statement, as the case may be, after the 180-day period 
described in clause (c) above, the Additional Interest borne by this Note 
from the date of such filing, effectiveness or consummation, as the case may 
be, will be reduced to the original interest rate set forth above if the 
Company is otherwise in compliance with this paragraph; provided, however, 
                                                        --------  -------
that, if after any such reduction in interest rate, a different event 
specified in clause (a), (b) or (c) above occurs, the interest rate will 
again be increased pursuant to the foregoing provisions.]*

        In the case of any redemption of Notes, interest installments 
whose Stated Maturity is on or prior to the Redemption Date will be payable 
to the Holders of such Notes, or one or more Predecessor Notes, of record at 
the close of business on the relevant Regular Record Date referred to on the 
face hereof.  Notes (or portions thereof) for whose redemption and payment 
provision is made in accordance with the Indenture shall cease to bear 
interest from and after the Redemption Date.

        In the event of redemption of this Note in part only, a new Note 
or Notes for the unredeemed portion hereof shall be issued in the name of 
the Holder hereof upon the cancellation hereof.

- --------------------------
 *   Include only for Initial Notes.

        If an Event of Default shall occur and be continuing, the 
principal of all the Notes and any accrued and unpaid interest thereon may 
be declared due and payable in the manner and with the effect provided in 
the Indenture and in an amount equal to (i) the Accreted Value of the Notes 
as of the date on which the Notes first become due and payable, if such date 
occurs prior to March 1, 2003, or (ii) 100% of the principal amount at 
Stated Maturity of the Notes as of the date on which the Notes first become 
due and payable plus accrued and unpaid interest, if any, to such date, if 
such date occurs on or after March 1, 2003.

        The Indenture contains provisions for defeasance at any time of 
(a) the entire indebtedness of the Company on this Note and (b) certain 
restrictive covenants and the related Defaults and Events of Default, upon 
compliance by the Company with certain conditions set forth therein, which 
provisions apply to this Note.

        The Indenture permits, with certain exceptions as therein 
provided, the amendment thereof and the modification of the rights and 
obligations of the Company and the rights of the Holders under the Indenture 
at any time by the Company and the Trustee with the consent of the Holders 
of a majority in aggregate principal amount at Stated Maturity of the Notes 
at the time Outstanding.  The Indenture also contains provisions permitting 
the Holders of specified percentages in aggregate principal amount at Stated 
Maturity of the Notes at the time Outstanding, on behalf of the Holders of 
all the Notes, to waive compliance by the Company with certain provisions of 
the Indenture and certain past defaults under the Indenture and their 
consequences.  Any such consent or waiver by or on behalf of the Holder of 
this Note shall be conclusive and binding upon such Holder and upon all 
future Holders of this Note and of any Note issued upon the registration of 
transfer hereof or in exchange therefor or in lieu hereof whether or not 
notation of such consent or waiver is made upon this Note.

        No reference herein to the Indenture and no provision of this 
Note or of the Indenture shall alter or impair the obligation of the 
Company, which is absolute and unconditional, to pay the principal of (and 
premium, if any) and interest on this Note at the times, place, and rate, 
and in the coin or currency, herein prescribed.

        As provided in the Indenture and subject to certain limitations 
therein set forth, the transfer of this Note is registrable on the Note 
Register of the Company, upon surrender of this Note for registration of 
transfer at the office or agency of the Company maintained for such purpose 
in The City of New York, duly endorsed by, or accompanied by a written 
instrument of transfer in form satisfactory to the Company and the Note 
Registrar duly executed by, the Holder hereof or his attorney duly 
authorized in writing, and thereupon one or more new Notes, of authorized 
denominations and for the same aggregate principal amount at Stated 
Maturity, will be issued to the designated transferee or transferees.


        The Notes are issuable only in registered form without coupons 
in denominations of $1,000 and any integral multiple thereof.  As provided 
in the Indenture and subject to certain limitations therein set forth, the 
Notes are exchangeable for a like aggregate principal amount at Stated 
Maturity of Notes of a different authorized denomination, as requested by 
the Holder surrendering the same.

        No service charge shall be made for any registration of transfer 
or exchange of Notes, but the Company may require payment of a sum 
sufficient to cover any tax or other governmental charge payable in 
connection therewith.

        Prior to the time of due presentment of this Note for 
registration of transfer, the Company, the Trustee and any agent of the 
Company or the Trustee may treat the Person in whose name this Note is 
registered as the owner hereof for all purposes, whether or not this Note be 
overdue, and neither the Company, the Trustee nor any agent shall be 
affected by notice to the contrary.

        All terms used in this Note that are defined in the Indenture 
shall have the meanings assigned to them in the Indenture.

        No recourse for the payment of the principal of, or premium, if 
any, or interest on, any of the Notes or for any claim based thereon or 
otherwise in respect thereof, and no recourse under or upon any obligation, 
covenant or agreement of the Company in the Indenture or in any of the 
Notes, or because of the creation of any Debt represented thereby, shall be 
had against any incorporator, stockholder, officer, director, employee, 
controlling person of the Company or of a Subsidiary of the Company or of 
any successor Person of the Company or of a Subsidiary of the Company.  Each 
Holder by accepting a Note waives and releases all such liability, and such 
waiver and release is part of the consideration for the issuance of the 
Notes.

        The Indenture and this Note shall be governed by, and construed 
in accordance with, the internal laws of the State of New York (without 
giving effect to the conflict of laws principles thereof).  The Trustee, the 
Company, and (by their acceptance of the Notes) the Holders agree to submit 
to the non-exclusive jurisdiction of any United States federal or state 
court located in the Borough of Manhattan, in the City of New York, in any 
action or proceeding arising out of or relating to the Indenture of this 
Note.

        Customary abbreviations may be used in the name of a Holder or 
an assignee, such as:  TEN COM (= tenants in common), TEN ENT (= tenants by 
the entireties), JT TEN (= joint tenants with right of survivorship and not 
as tenants in common), CUST (= Custodian) and U/G/M/A (= Uniform Gifts to 
Minors Act).


        The Company will furnish to any Holder upon written request and 
without charge a copy of the Indenture.  Requests may be made to Teligent, 
Inc., 8065 Leesburg Pike, Vienna, VA 22182, Attention:  Chief Financial 
Officer.

        SECTION 205.  Form of Trustee's Certificate of Authentication.
                      -----------------------------------------------

        The Trustee's certificate of authentication shall be in 
substantially the following form:

                  TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

        Dated:  ____________________

        This is one of the Notes referred to in the within-mentioned 
Indenture.

                                            FIRST UNION NATIONAL BANK,

                                                                as Trustee

                                            By
                                              ----------------------------
                                              Authorized Officer


        SECTION 206.  Form of Transfer Notice for the Notes.
                      -------------------------------------

        FOR VALUE RECEIVED the undersigned registered holder hereby 
sell(s), assign(s) and transfer(s) unto

Insert Taxpayer Identification No.
- ---------------------------------

- --------------------------------------------------------------------------
(Please print or typewrite name and address including zip code of assignee)


- --------------------------------------------------------------------------
the within Note and all rights thereunder, hereby irrevocably constituting 
and appointing


- --------------------------------------------------------------------------
attorney to transfer such Note on the books of the Company with full power 
of substitution in the premises.

                   [THE FOLLOWING PROVISION TO BE INCLUDED
                          ON ALL CERTIFICATES
                        REPRESENTING INITIAL NOTES]


        In connection with any transfer of this Note occurring prior to 
the date which is the earlier of the date of an effective Registration 
Statement or February 20, 2000; i.e., the end of the period referred to in 
Rule 144(k) under the Securities Act, the undersigned confirms that without 
utilizing any general solicitation or general advertising that:

                                 Check One
                                 ---------
   [ ]  this Note is being transferred in compliance with the exemption from 
        registration under the Securities Act of 1933, as amended, 
        provided by Rule 144A thereunder.

                                    or
                                    --
   [ ]  this Note is being transferred other than in accordance with (a) 
        above and documents are being furnished which comply with the 
        conditions of transfer set forth in this Note and the Indenture.

If none of the foregoing boxes is checked, the Trustee or other Note 
Registrar shall not be obligated to register this Note in the name of any 
Person other than the Holder hereof unless and until the conditions to any 
such transfer of registration set forth herein and in Sections 311 and 312 
of the Indenture shall have been satisfied.  


Date: 
      ---------------------
                                         -----------------------------
                                         NOTICE:  The signature to this 
                                         assignment must correspond with 
                                         the name as written upon the face 
                                         of the within-mentioned instrument 
                                         in every particular, without 
                                         alteration or any change 
                                         whatsoever.


Signature Guarantee:  
                    ----------------------------------
TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.


        Signatures must be guaranteed by an "eligible guarantor 
institution" meeting the requirements of the Note Registrar, which 
requirements include membership or participation in the Security Transfer 
Agent Medallion Program ("STAMP") or such other "signature guarantee 
program" as may be determined by the Note Registrar in addition to, or in 
substitution for, STAMP, all in accordance with the Securities Exchange Act 
of 1934, as amended.

        The undersigned represents and warrants that it is purchasing 
this Note for its own account or an account with respect to which it 
exercises sole investment discretion and that it and any such account is a 
"qualified institutional buyer" within the meaning of Rule 144A under the 
Securities Act of 1933, as amended, and is aware that the sale to it is 
being made in reliance on Rule 144A and acknowledges that it has received 
such information regarding the Company as the undersigned has requested 
pursuant to Rule 144A or has determined not to request such information and 
that it is aware that the transferor is relying upon the undersigned's 
foregoing representations in order to claim the exemption from registration 
provided by Rule 144A.


Dated: 
      ------------------------          ----------------------------          
                                        NOTICE:  To be executed by an 
                                                 executive officer


       [THE FOLLOWING PROVISIONS SHALL APPLY TO ALL OF THE NOTES]
                      OPTION OF HOLDER TO ELECT PURCHASE


        If you wish to have this Note purchased by the Company pursuant 
to Section 1009 or Section 1016 of the Indenture, check the Box: [ ]

        If you wish to have a portion of this Note purchased by the 
Company pursuant to Section 1009 or Section 1016 of the Indenture, state the 
amount (in original principal amount at Stated Maturity) below:


                         $                   .
                          -------------------

Date:   
      ----------------------

Your Signature:  
                ---------------------
(Sign exactly as your name appears on the other side of this Note)

Signature Guarantee:  
                     ----------------------------

        Signatures must be guaranteed by an "eligible guarantor 
institution" meeting the requirements of the Note Registrar, which 
requirements include membership or participation in the Security Transfer 
Agent Medallion Program ("STAMP") or such other "signature guarantee 
program" as may be determined by the Note Registrar in addition to, or in 
substitution for, STAMP, all in accordance with the Securities Exchange Act 
of 1934, as amended.


                                  ARTICLE THREE

                                    THE NOTES

        SECTION 301.  Title and Terms.
                      ---------------


        The aggregate principal amount at Stated Maturity of Notes that 
may be authenticated and delivered under this Indenture is limited to 
$440,000,000, except for Notes authenticated and delivered upon registration 
of transfer of, or in exchange for, or in lieu of, other Notes pursuant to 
Section 303, 304, 305, 306, 906, 1012 or 1013.

        The Notes shall be known and designated as the "11 1/2% Senior 
Discount Notes due 2008" and the Exchange Notes shall be known and 
designated as the "11 1/2% Series B Senior Discount Notes due 2008," in each 
case, of the Company.  Their Stated Maturity shall be March 1, 2008 and they 
shall bear interest at the rate of 11 1/2% per annum from March 1, 2003 or from 
the most recent Interest Payment Date to which interest has been paid or 
duly provided for, payable in cash on March 1, 2003 and semi-annually 
thereafter on March 1 and September 1 in each year and at said Stated 
Maturity until the principal thereof is paid or duly provided for.  The 
Notes will be issued at a discount to their aggregate principal amount at 
maturity.  The principal of the Notes shall not accrue interest until March 
1, 2003 except in the case of a default in payment of the amount due at 
Stated Maturity, in which case the amount due on the Notes shall bear 
interest at the rate borne by the Notes (to the extent that the payment of 
such interest shall be legally enforceable), which shall accrue from the 
date of such default to the date the payment of such amount has been made or 
duly provided for.  Interest on any overdue principal amount shall be 
payable on demand.

        The principal of (and premium, if any) and interest on the Notes 
shall be payable at the office or agency of the Company maintained for such 
purpose in The City of New York, or at such other office or agency of the 
Company as may be maintained for such purpose; provided, however, that, at 
                                               --------  -------
the option of the Company, interest may be paid (i) by check mailed to 
addresses of the Persons entitled thereto as such addresses shall appear on 
the Note Register or (ii) by transfer to an account maintained by the payee 
located in the United States.

        Holders shall have the right to require the Company to purchase 
their Notes, in whole or in part, in the event of a Change in Control 
pursuant to Section 1009.  The Notes shall be subject to repurchase pursuant 
to an Asset Sale Offer as provided in Section 1016.

        The Notes shall be redeemable as provided in Article Eleven.

        SECTION 302.  Denominations.
                      -------------
        The Notes shall be issuable only in registered form without 
coupons and only in denominations of $1,000 and any integral multiple 
thereof.

        SECTION 303.  Execution, Authentication, Delivery and Dating.
                      ----------------------------------------------

        The Notes shall be executed on behalf of the Company by its 
Chairman, its President or a Vice President and attested by its Secretary or 
an Assistant Secretary.  The signature of any of these officers on the Notes 
may be manual or facsimile signatures of the present or any future such 
authorized officer and may be imprinted or otherwise reproduced on the 
Notes.

        Notes bearing the manual or facsimile signatures of individuals 
who were at any time the proper officers of the Company shall bind the 
Company, notwithstanding that such individuals or any of them have ceased to 
hold such offices prior to the authentication and delivery of such Notes or 
did not hold such offices at the date of such Notes.

        On Company Order, the Trustee shall authenticate for original 
issue Initial Notes in an aggregate principal amount at Stated Maturity not 
to exceed $440,000,000.  On Company Order, the Trustee shall authenticate 
for original issue Exchange Notes in an aggregate principal amount at Stated 
Maturity not to exceed $440,000,000; provided that such Exchange Notes shall
                                     -------- 
be issuable only upon the valid surrender for cancellation of Initial Notes 
of a like aggregate principal amount at Stated Maturity in accordance with 
an Exchange Offer pursuant to the Registration Rights Agreement.  In each 
case, the Trustee shall be entitled to receive an Officers' Certificate and 
an Opinion of Counsel of the Company that it may reasonably request in 
connection with such authentication of Notes.  Such order shall specify the 
amount of Notes to be authenticated and the date on which the original issue 
of Notes is to be authenticated.

        At any time and from time to time after the execution and 
delivery of this Indenture, the Company may deliver Notes executed by the 
Company to the Trustee for authentication, together with a Company Order for 
the authentication and delivery of such Notes, and the Trustee in accordance 
with such Company Order shall authenticate and deliver such Notes.

        Each Note shall be dated the date of its authentication.

        No Note shall be entitled to any benefit under this Indenture or 
be valid or obligatory for any purpose unless there appears on such Note a 
certificate of authentication substantially in the form provided for herein 
duly executed by the Trustee by manual signature of an authorized officer, 
and such certificate upon any Note shall be conclusive evidence, and the 
only evidence, that such Note has been duly authenticated and delivered 
hereunder and is entitled to the benefits of this Indenture.


        In case the Company, pursuant to Article Eight, shall be 
consolidated or merged with or into any other Person or shall convey, 
transfer, lease or otherwise dispose of its properties and assets 
substantially as an entirety to any Person, and the successor Person 
resulting from such consolidation, or surviving such merger, or into which 
the Company shall have been merged, or the Person that shall have received a 
conveyance, transfer, lease or other disposition as aforesaid, shall have 
executed an indenture supplemental hereto with the Trustee pursuant to 
Article Eight, any of the Notes authenticated or delivered prior to such 
consolidation, merger, conveyance, transfer, lease or other disposition may, 
from time to time, at the request of the successor Person, be exchanged for 
other Notes executed in the name of the successor Person with such changes 
in phraseology and form as may be appropriate, but otherwise in substance of 
like tenor as the Notes surrendered for such exchange and of like principal 
amount at Stated Maturity; and the Trustee, upon Company Request of the 
successor Person, shall authenticate and deliver Notes as specified in such 
request for the purpose of such exchange.  If Notes shall at any time be 
authenticated and delivered in any new name of a successor Person pursuant 
to this Section in exchange or substitution for or upon registration of 
transfer of any Notes, such successor Person, at the option of the Holders 
but without expense to them, shall provide for the exchange of all 
Outstanding Notes for Notes authenticated and delivered in such new name.

        SECTION 304.  Temporary Notes.
                      ---------------

        Pending the preparation of definitive Notes, the Company may 
execute, and upon Company Order the Trustee shall authenticate and deliver, 
temporary Notes that are printed, lithographed, typewritten, mimeographed or 
otherwise produced, in any authorized denomination, substantially of the 
tenor of the definitive Notes in lieu of which they are issued and with such 
appropriate insertions, omissions, substitutions and other variations as the 
officers executing such Notes may determine, as conclusively evidenced by 
their execution of such Notes.

        If temporary Notes are issued, the Company will cause definitive 
Notes to be prepared without unreasonable delay.  After the preparation of 
definitive Notes, the temporary Notes shall be exchangeable for definitive 
Notes upon surrender of the temporary Notes at the office or agency of the 
Company designated for such purpose pursuant to Section 1002, without charge 
to the Holder.  Upon surrender for cancellation of any one or more temporary 
Notes, the Company shall execute and the Trustee shall authenticate and 
deliver in exchange therefor a like principal amount at Stated Maturity of 
definitive Notes of authorized denominations.  Until so exchanged, the 
temporary Notes shall in all respects be entitled to the same benefits under 
this Indenture as definitive Notes.

        SECTION 305.  Registration, Registration of Transfer and Exchange.
                      ---------------------------------------------------

        The Company shall cause to be kept at the Corporate Trust Office 
of the Trustee a register (the register maintained in such office and in any 
other office or agency designated pursuant to Section 1002 being herein 
sometimes referred to as the "Note Register") in which, subject to such 
reasonable regulations as it may prescribe, the Company shall provide for 
the registration of Notes and of transfers of Notes.  The Note Register 
shall be in written form or any other form capable of being converted into 
written form within a reasonable time.  At all reasonable times, the Note 
Register shall be open to inspection by the Trustee.  The Trustee is hereby 
initially appointed as security registrar (the "Note Registrar") for the 
purpose of registering Notes and transfers of Notes as herein provided.

        Upon surrender for registration of transfer of any Note at the 
office or agency of the Company designated pursuant to Section 1002, the 
Company shall execute, and the Trustee shall authenticate and deliver, in 
the name of the designated transferee or transferees, one or more new Notes 
of any authorized denomination or denominations of a like aggregate 
principal amount at Stated Maturity.

        At the option of the Holder, Notes may be exchanged for other 
Notes of any authorized denomination and of a like aggregate principal 
amount at Stated Maturity, upon surrender of the Notes to be exchanged 
(including an exchange of Initial Notes for Exchange Notes), at such office 
or agency.  Whenever any Notes are so surrendered for exchange, the Company 
shall execute, and the Trustee shall authenticate and deliver, the Notes 
that the Holder making the exchange is entitled to receive; provided that no
                                                            -------- 
exchange of Initial Notes for Exchange Notes shall occur until an Exchange 
Offer Registration Statement shall have been declared effective by the 
Commission, the Trustee shall have received an Officers' Certificate 
confirming that the Exchange Offer Registration Statement has been declared 
effective by the Commission and the Initial Notes to be exchanged for the 
Exchange Notes have been cancelled by the Trustee.

        All Notes issued upon any registration of transfer or exchange 
of Notes shall be the valid obligations of the Company, evidencing the same 
debt, and entitled to the same benefits under this Indenture, as the Notes 
surrendered upon such registration of transfer or exchange.

        Every Note presented or surrendered for registration of transfer 
or for exchange shall (if so required by the Company or the Note Registrar) 
be duly endorsed, or be accompanied by a written instrument of transfer, in 
the form attached to the Note or otherwise satisfactory to the Company and 
the Note Registrar, duly executed by the Holder thereof or his attorney duly 
authorized in writing.

        No service charge shall be made for any registration of transfer 
or exchange or redemption of Notes, but the Company may require payment of a 
sum sufficient to cover any tax or other governmental charge that may be 
imposed in connection with any registration of transfer or exchange of 
Notes, other than exchanges pursuant to Section 304, 906, 1012, 1013 or 1108 
not involving any transfer.


        The Company shall not be required (i) to issue, register the 
transfer of or exchange any Note during a period beginning at the opening of 
business 15 days before the selection of Notes to be redeemed under Section 
1104 and ending at the close of business on the day of such mailing of the 
relevant notice of redemption, (ii) to register the transfer of or exchange 
any Note so selected for redemption in whole or in part, except the 
unredeemed portion of any Note being redeemed in part or (iii) to issue, 
register, transfer or exchange any Note during a Change of Control Offer or 
an Asset Sale Offer, if such Note is tendered pursuant to such Change of 
Control Offer or Asset Sale Offer and not withdrawn.

        SECTION 306.  Mutilated, Destroyed, Lost and Stolen Notes.
                      -------------------------------------------

        If (i)  any mutilated Note is surrendered to the Trustee, or 
(ii) the Company and the Trustee receive evidence to their satisfaction of 
the destruction, loss or theft of any Note, and there is delivered to the 
Company and the Trustee such security or indemnity as may be required by 
them to save each of them harmless, then, in the absence of notice to the 
Company or the Trustee that such Note has been acquired by a bona fide 
purchaser, the Company shall execute and upon Company Order the Trustee 
shall authenticate and deliver, in exchange for any such mutilated Note or 
in lieu of any such destroyed, lost or stolen Note, a replacement Note of 
like tenor and principal amount at Stated Maturity, bearing a number not 
contemporaneously outstanding.

        In case any such mutilated, destroyed, lost or stolen Note has 
become or is about to become due and payable, the Company in its discretion 
may, instead of issuing a replacement Note, pay such Note.

        Upon the issuance of any replacement Note under this Section, 
the Company may require the payment of a sum sufficient to cover any tax or 
other governmental charge that may be imposed in relation thereto and any 
other expenses (including the fees and expenses of the Trustee) connected 
therewith.

        Every replacement Note issued pursuant to this Section in lieu 
of any mutilated, destroyed, lost or stolen Note shall constitute an 
original additional contractual obligation of the Company, whether or not 
the mutilated, destroyed, lost or stolen Note shall be at any time 
enforceable by anyone, and shall be entitled to all benefits of this 
Indenture equally and proportionately with any and all other Notes duly 
issued hereunder.

        The provisions of this Section are exclusive and shall preclude 
(to the extent lawful) all other rights and remedies with respect to the 
replacement or payment of mutilated, destroyed, lost or stolen Notes.


        SECTION 307.  Payment of Interest; Interest Rights Preserved.
                      ----------------------------------------------

        Interest on any Note that is payable, and is punctually paid or 
duly provided for, on any Interest Payment Date shall be paid to the Person 
in whose name such Note (or one or more Predecessor Notes) is registered at 
the close of business on the Regular Record Date for such interest at the 
office or agency of the Company maintained for such purpose pursuant to 
Section 1002; provided, however, that each installment of interest may at
              --------  ------- 
the Company's option be paid by (i) mailing a check for such interest, 
payable to or upon the written order of the Person entitled thereto pursuant 
to Section 308, to the address of such Person as it appears in the Note 
Register or (ii) transfer to an account located in the United States 
maintained by the payee.

        Any interest on any Note that is payable, but is not punctually 
paid or duly provided for, on any Interest Payment Date shall forthwith 
cease to be payable to the Holder on the Regular Record Date by virtue of 
having been such Holder, and such defaulted interest and (to the extent 
lawful) interest on such defaulted interest at the rate borne by the Notes 
(such defaulted interest and interest thereon herein collectively called 
"Defaulted Interest") may be paid by the Company, at its election in each 
case, as provided in clause (1) or (2) below:


        (1)  The Company may elect to make payment of any Defaulted 
   Interest to the Persons in whose names the Notes (or their respective 
   Predecessor Notes) are registered at the close of business on a 
   Special Record Date for the payment of such Defaulted Interest, which 
   shall be fixed in the following manner.  The Company shall notify the 
   Trustee in writing of the amount of Defaulted Interest proposed to be 
   paid on each Note and the date of the proposed payment, and at the 
   same time the Company shall deposit with the Trustee an amount of 
   money equal to the aggregate amount proposed to be paid in respect of 
   such Defaulted Interest or shall make arrangements reasonably 
   satisfactory to the Trustee for such deposit prior to the date of the 
   proposed payment, such money when deposited to be held in trust for 
   the benefit of the Persons entitled to such Defaulted Interest as in 
   this clause (1) provided.  Thereupon the Trustee shall fix a Special 
   Record Date for the payment of such Defaulted Interest which shall be 
   not more than 15 days and not less than 10 days prior to the date of 
   the proposed payment and not less than 10 days after the receipt by 
   the Trustee of the notice of the proposed payment.  The Trustee shall 
   promptly notify the Company of such Special Record Date, and in the 
   name and at the expense of the Company, shall cause notice of the 
   proposed payment of such Defaulted Interest and the Special Record 
   Date therefor to be given in the manner provided for in Section 106, 
   not less than 10 days prior to such Special Record Date.  Notice of 
   the proposed payment of such Defaulted Interest and the Special Record 
   Date therefor having been so given, such Defaulted Interest shall be 
   paid to the Persons in whose names the Notes (or their respective 
   Predecessor Notes) are registered at the close of business on such 
   Special Record Date and shall no longer be payable pursuant to the 
   following clause (2).

        (2) The Company may make payment of any Defaulted Interest in any 
   other lawful manner not inconsistent with the requirements of any 
   securities exchange on which the Notes may be listed, and upon such 
   notice as may be required by such exchange, if, after notice given by 
   the Company to the Trustee of the proposed payment pursuant to this 
   clause, such manner of payment shall be deemed practicable by the 
   Trustee.

        Subject to the foregoing provisions of this Section, each Note 
delivered under this Indenture upon registration of transfer of or in 
exchange for or in lieu of any other Note shall carry the rights to interest 
accrued and unpaid, and to accrue, that were carried by such other Note.

        SECTION 308.  Persons Deemed Owners.
                      ---------------------

        Prior to and at the time of the due presentment of a Note for 
registration of transfer, the Company, the Trustee and any agent of the 
Company or the Trustee may treat the Person in whose name such Note is 
registered as the owner of such Note for the purpose of receiving payment of 
principal of (and premium, if any) and (subject to Sections 305 and 307) 
interest on such Note and for all other purposes whatsoever, whether or not 
such Note be overdue, and none of the Company, the Trustee or any agent of 
the Company or the Trustee shall be affected by notice to the contrary.

        SECTION 309.  Cancellation.
                      ------------

        All Notes surrendered for payment, redemption, registration of 
transfer or exchange shall, if surrendered to any Person other than the 
Trustee, be delivered to the Trustee and shall be promptly cancelled by it.  
The Company may at any time deliver to the Trustee for cancellation any 
Notes previously authenticated and delivered hereunder that the Company may 
have acquired in any manner whatsoever, and may deliver to the Trustee (or 
to any other Person for delivery to the Trustee) for cancellation any Notes 
previously authenticated hereunder that the Company has not issued and sold, 
and all Notes so delivered shall be promptly cancelled by the Trustee.  No 
Notes shall be authenticated in lieu of or in exchange for any Notes 
cancelled as provided in this Section, except as expressly permitted by this 
Indenture.  All cancelled Notes held by the Trustee shall be disposed of by 
the Trustee in accordance with its customary procedures and certification of 
their disposal delivered to the Company unless by Company Order the Company 
shall direct that cancelled Notes be returned to it.  The Trustee shall 
provide the Company with a list of all Notes that have been cancelled from 
time to time as requested by the Company.

        SECTION 310.  Computation of Interest.
                      -----------------------
 
        Interest on the Notes shall be computed on the basis of a 
360-day year of twelve 30-day months.

        SECTION 311.  Book-Entry Provisions for Global Notes.
                      --------------------------------------

        (a)  Each Global Note initially shall (i) be registered in the 
name of the Depositary for such Global Notes or the nominee of such 
Depositary, (ii) be delivered to the Trustee as custodian for such 
Depositary and (iii) bear legends as set forth in Section 203.

        Members of, or participants in, the Depositary ("Agent Members") 
shall have no rights under this Indenture with respect to any Global Note, 
and the Depositary may be treated by the Company, the Trustee and any agent 
of the Company or the Trustee as the absolute owner of such Global Note for 
all purposes whatsoever.  Notwithstanding the foregoing, nothing herein 
shall prevent the Company, the Trustee or any agent of the Company or the 
Trustee from giving effect to any written certification, proxy or other 
authorization furnished by the Depositary or impair, as between the 
Depositary and its Agent Members, the operation of customary practices 
governing the exercise of the rights of a beneficial owner of any Note.  The 
registered holder of a Global Note may grant proxies and otherwise authorize 
any person, including Agent Members and persons that may hold interests 
through Agent Members, to take any action which a Holder is entitled to take 
under this Indenture or the Notes.


        (b)  Interests of beneficial owners in a Global Note may be 
transferred in accordance with the applicable rules and procedures of the 
Depositary and the provisions of Section 312.  Transfers of a Global Note 
shall be limited to transfers of such Global Note in whole, but not in part, 
to the Depositary, its successors or their respective nominees, except 
(i) as otherwise set forth in Section 312 and (ii) U.S. Physical Notes or 
Offshore Physical Notes shall be transferred to all beneficial owners in 
exchange for their beneficial interests in the U.S. Global Note or the 
Offshore Global Note, respectively, in the event that the Depositary 
notifies the Company that it is unwilling or unable to continue as 
Depositary for the applicable Global Note or the Depositary ceases to be a 
"Clearing Agency" registered under the Exchange Act and a successor 
depositary is not appointed by the Company within 90 days or an Event of 
Default has occurred and is continuing and the Note Registrar has received a 
request from the Depositary.  In connection with a transfer of an entire 
Global Note to beneficial owners pursuant to clause (ii) of this paragraph 
(b), the applicable Global Note shall be deemed to be surrendered to the 
Trustee for cancellation, and the Company shall execute, and the Trustee 
shall authenticate and deliver, to each beneficial owner identified by the 
Depositary in exchange for its beneficial interest in the applicable Global 
Note, an equal aggregate principal amount at Stated Maturity of U.S. 
Physical Notes (in the case of the U.S. Global Note) or Offshore Physical 
Notes (in the case of the Offshore Global Note), as the case may be, of 
authorized denominations.

        (c)  Any beneficial interest in one of the Global Notes that is 
transferred to a person who takes delivery in the form of an interest in the 
other Global Note will, upon transfer, cease to be an interest in such 
Global Note and become an interest in the other Global Note and, 
accordingly, will thereafter be subject to all transfer restrictions, if 
any, and other procedures applicable to beneficial interests in such other 
Global Note for as long as it remains such an interest.

        (d)  Any U.S. Physical Note delivered in exchange for an interest 
in the U.S. Global Note pursuant to paragraph (b) of this Section shall, 
unless such exchange is made on or after the Resale Restriction Termination 
Date and except as otherwise provided in Section 312, bear the Private 
Placement Legend.

        SECTION 312.  Transfer Provisions.
                      -------------------

        Unless and until the earlier of (A) the date which is two years 
(or such shorter period of time as permitted by rule 144 under the 
Securities Act and any successor provision thereunder) after the later of 
the original issue date of the Initial Notes or the last day on which the 
Company or any affiliate of the Company was the owner of an Initial Note or 
(B) the date on which (i) an Initial Note is sold pursuant to an effective 
Registration Statement, or (ii) an Initial Note is exchanged for an Exchange 
Note in the Exchange Offer pursuant to an effective Registration Statement, 
in each case, pursuant to the Registration Rights Agreement, the following 
provisions shall apply:

        (a)  General.  The provisions of this Section 312 shall apply to 
   all transfers involving any Physical Note and any beneficial interest 
   in any Global Note.

        (b)  Certain Definitions.  As used in this Section 312 only, 
   "delivery" of a certificate by a transferee or transferor means the 
   delivery to the Note Registrar by such transferee or transferor of the 
   applicable certificate duly completed; "holding" includes both 
   possession of a Physical Note and ownership of a beneficial interest 
   in a Global Note, as the context requires; "transferring" a Global 
   Note means transferring that portion of the principal amount of the 
   transferor's beneficial interest therein that the transferor has 
   notified the Note Registrar that it has agreed to transfer; and 
   "transferring" a Physical Note means transferring that portion of the 
   principal amount thereof that the transferor has notified the Note 
   Registrar that it has agreed to transfer.


        As used in this Indenture, "Regulation S Certificate" means a 
   Certificate substantially in the form set forth in Section 313; "Rule 
   144A Certificate" means a certificate substantially in the form set 
   forth in Section 314; and "Non-Registration Opinion and Supporting 
   Evidence" means a written opinion of counsel reasonably acceptable to 
   the Company to the effect that, and such other certification or 
   information as the Company may reasonably require to confirm that, the 
   proposed transfer is being made pursuant to an exemption from, or in a 
   transaction not subject to, the registration requirements of the 
   Securities Act.

        (c)  [Intentionally Omitted]

        (d)  Deemed Delivery of a Rule 144A Certificate in Certain 
             -----------------------------------------------------
 Circumstances. 
 --------------
A Rule 144A Certificate, if not actually delivered, will be deemed 
delivered if (A) (i) the transferor advises the Company and the 
Trustee in writing that the relevant offer and sale were made 
in accordance with the provisions of Rule 144A (or, in the case of a 
transfer of a Physical Note, the transferor checks the box provided on 
the Physical Note to that effect) and (ii) the transferee advises the 
Company and the Trustee in writing that (x) it and, if applicable, 
each account for which it is acting in connection with the relevant 
transfer, is a qualified institutional buyer within the meaning of 
Rule 144A, (y) it is aware that the transfer of Notes to it is being 
made in reliance on the exemption from the provisions of Section 5 of 
the Securities Act provided by Rule 144A, and (z) prior to the 
proposed date of transfer it has been given the opportunity to obtain 
from the Company the information referred to in Rule 144A(d)(4), and 
has either declined such opportunity or has received such information 
(or, in the case of a transfer of a Physical Note, the transferee 
signs the certification provided on the Physical Note to that effect); 
or (B) the transferor holds the Global Note and is transferring to a 
transferee that will take delivery in the form of the Global Note.

        (e)  Procedures and Requirements.  If the proposed transferor 
holds:       ---------------------------

             (1)  a U.S. Physical Note which is surrendered to the 
            Note Registrar, and the proposed transferee or transferor, 
            as applicable:


                 (A)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee requests 
             delivery in the form of a U.S. Physical Note, then 
             the Note Registrar shall (x) register such transfer 
             in the name of such transferee and record the date 
             thereof in its books and records, (y) cancel such 
             surrendered U.S. Physical Note and (z) deliver a new 
             U.S. Physical Note to such transferee duly 
             registered in the name of such transferee in 
             principal amount equal to the principal amount being 
             transferred of such surrendered U.S. Physical Note; 

                 (B)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee is or is 
             acting through an Agent Member and requests that the 
             proposed transferee receive a beneficial interest in 
             the U.S. Global Note, then the Note Registrar shall 
             (x) cancel such surrendered U.S. Physical Note, (y) 
             record an increase in the aggregate principal amount 
             of the U.S. Global Note equal to the principal 
             amount being transferred of such surrendered U.S. 
             Physical Note and (z) notify the Depositary in 
             accordance with the procedures of the Depositary 
             that it approves of such transfer; or

                 (C)  delivers a Regulation S Certificate, then 
             the Note Registrar shall cancel such surrendered 
             U.S. Physical Note and at the direction of the 
             transferee, either:

                   (i)  register such transfer in the name of 
                 such transferee, record the date thereof in 
                 its books and records and deliver a new 
                 Offshore Physical Note to such transferee duly 
                 registered in the name of such transferee in 
                 principal amount equal to the principal amount 
                 being transferred of such surrendered U.S. 
                 Physical Note, or

                   (ii) if the proposed transferee is or is 
                 acting through an Agent Member, record an 
                 increase in the aggregate principal amount of 
                 the Offshore Global Note equal to the 
                 principal amount being transferred of such 
                 surrendered U.S. Physical Note and notify the 
                 Depositary in accordance with the procedures 
                 of the Depositary that it approves of such 
                 transfer.

             In any of the cases described in this Section 
             312(e)(1)(A), (B) or (C)(i), the Note Registrar 
             shall deliver to the transferor a new U.S. Physical 
             Note duly registered in the name of such transferor 
             in principal amount equal to the principal amount 
             not being transferred, if any, of such surrendered 
             U.S. Physical Note, as applicable.


             (2)  a beneficial interest in the U.S. Global Note, 
        and the proposed transferee or transferor, as applicable:

                  (A)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee requests 
             delivery in the form of a U.S. Physical Note, then 
             the Note Registrar shall (w) register such transfer 
             in the name of such transferee and record the date 
             thereof in its books and records, (x) record a 
             decrease in the aggregate principal amount of the 
             U.S. Global Note in an amount equal to the 
             beneficial interest therein being transferred, (y) 
             deliver a new U.S. Physical Note to such transferee 
             duly registered in the name of such transferee in 
             principal amount equal to the amount of such 
             decrease and (z) notify the Depositary in accordance 
             with the procedures of the Depositary that it 
             approves of such transfer;

                  (B)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee is or is 
             acting through an Agent Member and requests that the 
             proposed transferee receive a beneficial interest in 
             the U.S. Global Note, then the transfer shall be 
             effected in accordance with the procedures of the 
             Depositary therefor; or

                  (C)  delivers a Regulation S Certificate, then 
             the Note Registrar shall (x) record a decrease in 
             the aggregate principal amount of the U.S. Global 
             Note in an amount equal to the beneficial interest 
             therein being transferred, (y) notify the Depositary 
             in accordance with the procedures of the Depositary 
             that it approves of such transfer and (z) at the 
             direction of the transferee, either:

                       (i)  register such transfer in the name of 
                       such transferee, record the date thereof in 
                       its books and records and deliver a new 
                       Offshore Physical Note to such transferee duly 
                       registered in the name of such transferee in 
                       principal amount equal to the amount of such 
                       decrease, or


                       (ii) if the proposed transferee is or is 
                       acting through an Agent Member, record an 
                       increase in the aggregate principal amount of 
                       the Offshore Global Note equal to the amount 
                       of such decrease.

             (3)  an Offshore Physical Note which is surrendered to 
        the Note Registrar, and the proposed transferee or 
        transferor, as applicable:

                  (A)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee is or is 
             acting through an Agent Member and requests that the 
             proposed transferee receive a beneficial interest in 
             the U.S. Global Note, then the Note Registrar shall 
             (x) cancel such surrendered Offshore Physical Note, 
             (y) record an increase in the aggregate principal 
             amount of the U.S. Global Note equal to the 
             principal amount being transferred of such 
             surrendered Offshore Physical Note and (z) notify 
             the Depositary in accordance with the procedures of 
             the Depositary that it approves of such transfer;

                  (B)  where the proposed transferee is or is 
             acting through an Agent Member, requests that the 
             proposed transferee receive a beneficial interest in 
             the Offshore Global Note, then the Note Registrar 
             shall (x) cancel such surrendered Offshore Physical 
             Note, (y) record an increase in the aggregate 
             principal amount of the Offshore Global Note equal 
             to the principal amount being transferred of such 
             surrendered Offshore Physical Note and (z) notify 
             the Depositary in accordance with the procedures of 
             the Depositary that it approves of such transfer;

                  (C)  delivers (or is deemed to have delivered 
             pursuant to clause (d) above) a Rule 144A 
             Certificate and the proposed transferee requests 
             delivery in the form of a U.S. Physical Note, then 
             the Note Registrar shall (x) register such transfer 
             in the name of such transferee and record the date 
             thereof in its books and records, (y) cancel such 
             surrendered Offshore Physical Note and (z) deliver a 
             new U.S. Physical Note to such transferee duly 
             registered in the name of such transferee in 
             principal amount equal to the principal amount being 
             transferred of such surrendered U.S. Physical Note; or

                  (D)  does not make a request covered by Section 
             312(e)(3)(A), (B) or(C), then the Note Registrar 
             shall (x) register such transfer in the name of such 
             transferee and record the date thereof in its books 
             and records, (y) cancel such surrendered Offshore 
             Physical Note and (z) deliver a new Offshore 
             Physical Note to such transferee duly registered in 
             the name of such transferee in principal amount 
             equal to the principal amount being transferred of 
             such surrendered Offshore Physical Note.

             In any of the cases described in this Section 
             312(e)(3), the Note Registrar shall deliver to the 
             transferor a new Offshore Physical Note duly 
             registered in the name of such transferor in 
             principal amount equal to the principal amount not 
             being transferred of such surrendered Offshore 
             Physical Note, as applicable.

             (4)  a beneficial interest in the Offshore Global 
Note, and the proposed transferee or transferor, as applicable:

                  (A)  delivers (or is deemed to have delivered 
              pursuant to clause (d) above) a Rule 144A 
              Certificate and the proposed transferee is or is 
              acting through an Agent Member and requests that the 
              proposed transferee receive a beneficial interest in 
              the U.S. Global Note, then the Note Registrar shall 
              (x) record a decrease in the aggregate principal 
              amount of the Offshore Global Note in an amount 
              equal to the beneficial interest therein being 
              transferred, (y) record an increase in the aggregate 
              principal amount of the U.S. Global Note equal to 
              the amount of such decrease and (z) notify the 
              Depositary in accordance with the procedures of the 
              Depositary that it approves of such transfer;

                  (B)  where the proposed transferee is or is 
              acting through an Agent Member, requests that the 
              proposed transferee receive a beneficial interest in 
              the Offshore Global Note, then the transfer shall be 
              effected in accordance with the procedures of the 
              Depositary therefor; or


                  (C)  delivers (or is deemed to have delivered 
              pursuant to clause (d) above) a Rule 144A 
              Certificate and the proposed transferee requests 
              delivery in the form of a U.S. Physical Note, then 
              the Note Registrar shall  (w) register such transfer 
              in the name of such transferee and record the date 
              thereof in its books and records, (x) record a 
              decrease in the aggregate principal amount of the 
              Offshore Global Note in an amount equal to the 
              beneficial interest therein being transferred, (y) 
              deliver a new U.S. Physical Note to such transferee 
              duly registered in the name of such transferee in 
              principal amount equal to the amount of such 
              decrease and (z) notify the Depositary in accordance 
              with the procedures of the Depositary that it 
              approves of such transfer;

                  (D)  does not make a request covered by Section 
              312(e)(4)(A), (B) or (C), then the Note Registrar 
              shall (w) register such transfer in the name of such 
              transferee and record the date thereof in its books 
              and records, (x) record a decrease in the aggregate 
              principal amount of the Offshore Global Note in an 
              amount equal to the beneficial interest therein 
              being transferred, (y) deliver a new Offshore 
              Physical Note to such transferee duly registered in 
              the name of such transferee in principal amount 
              equal to the amount of such decrease and (z) notify 
              the Depositary in accordance with the procedures of 
              the Depositary that it approves of such transfer.

          (f)  Execution, Authentication and Delivery of Physical Notes.  In 
               --------------------------------------------------------
   any case in which the Note Registrar is required to deliver a Physical 
   Note to a transferee or transferor, the Company shall execute, and the 
   Trustee shall authenticate and make available for delivery, such 
   Physical Note.

          (g)Certain Additional Terms Applicable to Physical Notes.  Any 
             -----------------------------------------------------
   transferee entitled to receive a Physical Note may request that the 
   principal amount thereof be evidenced by one or more Physical Notes in 
   any authorized denomination or denominations and the Note Registrar 
   shall comply with such request if all other transfer restrictions are 
   satisfied.

          (h)Transfers Not Covered by Section 312(e).  The Note Registrar 
             ---------------------------------------
   shall effect and record, upon receipt of a written request from the 
   Company so to do, a transfer not otherwise permitted by Section 
   312(e), such recording to be done in accordance with the otherwise 
   applicable provisions of Section 312(e), upon the furnishing by the 
   proposed transferor or transferee of a Non-Registration Opinion and 
   Supporting Evidence.


          (i)General.  By its acceptance of any Note bearing the Private 
             -------
   Placement Legend, each Holder of such Note acknowledges the 
   restrictions on transfer of such Note set forth in this Indenture and 
   in the Private Placement Legend and agrees that it will transfer such 
   Note only as provided in the Indenture.  The Note Registrar shall not 
   register a transfer of any Note unless such transfer complies with the 
   restrictions with respect thereto set forth in this Indenture.  The 
   Note Registrar shall not be required to determine (but may rely upon a 
   determination made by the Company) the sufficiency or accuracy of any 
   such certifications, legal opinions, other information or document.

          (j)  Private Placement Legend.  Upon the transfer, exchange or 
               ------------------------
   replacement of Notes not bearing the Private Placement Legend, the 
   Note Registrar shall deliver Notes that do not bear the Private 
   Placement Legend.  Upon the transfer, exchange or replacement of Notes 
   bearing the Private Placement Legend, the Note Registrar shall deliver 
   only Notes that bear the Private Placement Legend unless (i) the 
   requested transfer is at least two years after the original issue date 
   of the Initial Note (ii) there is delivered to the Note Registrar an 
   Opinion of Counsel reasonably satisfactory to the Company and the 
   Trustee to the effect that neither such legend nor the related 
   restrictions on transfer are required in order to maintain compliance 
   with the provisions of the Securities Act or (iii) such Notes are 
   exchanged for Exchange Notes pursuant to an Exchange Offer. 

          SECTION 313.  Form of Regulation S Certificate.
                        --------------------------------
                           Regulation S Certificate
                           ------------------------

To:   First Union National Bank
      901 East Cary Street
      Richmond, VA  23219

      Attention:   Corporate Trust Department
 
      Re:   Teligent, Inc. (the "Company")
            11 1/2% Senior Discount Notes due 2008 (the "Notes")
            ---------------------------------------------------

Ladies and Gentlemen:

            In connection with our proposed sale of $      aggregate 
                                                     ------
principal amount of Notes, we confirm that such sale has been effected 
pursuant to and in accordance with Regulation S ("Regulation S") under the 
Securities Act of 1933, as amended (the "Securities Act"), and accordingly, 
we hereby certify as follows:

            1.  The offer of the Notes was not made to a person in the United 
        States (unless such person or the account held by it for which it is 
        acting is excluded from the definition of "U.S. person" pursuant to 
        Rule 902(o) of Regulation S under the circumstances described in Rule 
        902(i)(3) of Regulation S) or specifically targeted at an identifiable 
        group of U.S. citizens abroad.

            2.  Either (a) at the time the buy order was originated, the buyer 
        was outside the United States or we and any person acting on our 
        behalf reasonably believed that the buyer was outside the United 
        States or (b) the transaction was executed in, on or through the 
        facilities of a designated offshore securities market, and neither we 
        nor any person acting on our behalf knows that the transaction was 
        pre-arranged with a buyer in the United States.

            3.  Neither we, any of our affiliates, nor any person acting on 
        our or their behalf has made any directed selling efforts in the 
        United States in contravention of the requirements of Rule 903(b) or 
        Rule 904(b) of Regulation S, as applicable.

            4.  The proposed transfer of Notes is not part of a plan or scheme 
        to evade the registration requirements of the Securities Act.

            5.  If we are an officer or director of the Company or a 
        distributor, we certify that the proposed transfer is being made in 
        accordance with the provisions of Rules 903 and 904(c) of 
        Regulation S.

            You and the Company are entitled to rely upon this Certificate 
and are irrevocably authorized to produce this Certificate or a copy hereof 
to any interested party in any administrative or legal proceeding or 
official inquiry with respect to the matters covered hereby.  Terms used in 
this certificate have the meanings set forth in Regulation S.

                                                 Very truly yours,

                                                 [NAME OF SELLER]


                                                  By:
                                                     ---------------------
                                                     Name:
                                                     Title:
                                                     Address:


Date of this Certificate:                , 199
                           ---------- --     -----

                   SECTION 314.  Form of Rule 144A Certificate. 
                                 -----------------------------

                                    Rule 144A Certificate
                                    ---------------------
To:     First Union National Bank
        901 East Cary Street
        Richmond, VA  23219
 
        Attention:  Corporate Trust Department

        Re:  Teligent, Inc. (the "Company")
             11 1/2% Senior Discount Notes due 2008 (the "Notes")
             ---------------------------------------------------

Ladies and Gentlemen:

        In connection with our proposed purchase of $     aggregate 
                                             ----
principal amount of Notes, we confirm that such purchase has been effected 
pursuant to and in accordance with Rule 144A ("Rule 144A") under the 
Securities Act of 1933, as amended (the "Securities Act").  We are aware 
that the transfer of Notes to us is being made in reliance on the exemption 
from the provisions of Section 5 of the Securities Act provided by Rule 
144A.  Prior to the date of this Certificate we have been given the 
opportunity to obtain from the Company the information referred to in Rule 
144A(d)(4), and have either declined such opportunity or have received such 
information.

        You and the Company are entitled to rely upon this Certificate 
and are irrevocably authorized to produce this Certificate or a copy hereof 
to any interested party in any administrative or legal proceeding or 
official inquiry with respect to the matters covered hereby.

                                          Very truly yours,

                                          [NAME OF PURCHASER]


                                           By:
                                              --------------------------
                                              Name:
                                              Title:
                                              Address:

Date of this Certificate:               , 199
                           ---------- --     -----

        SECTION 315.  CUSIP Numbers.
                      -------------

        The Company in issuing the Notes may use "CUSIP" numbers (if 
then generally in use) in addition to serial numbers and, if so, the Trustee 
shall use such "CUSIP" numbers in addition to serial numbers in notices of 
redemption, repurchase or other notices to Holders as a convenience to 
Holders; provided that any such notice may state that no representation is 
made as to the correctness of such CUSIP numbers either as printed on the 
Notes or as contained in any notice of a redemption or repurchase and that 
reliance may be placed only on the serial or other identification numbers 
printed on the Notes, and any such redemption or repurchase shall not be 
affected by any defect in or omission of such numbers.  The Company will 
promptly notify the Trustee of any change in the CUSIP numbers.


                               ARTICLE FOUR

                        SATISFACTION AND DISCHARGE

        SECTION 401.  Satisfaction and Discharge of Indenture.
                      ----------------------------------------

        This Indenture shall upon Company Request cease to be of further 
effect (except as to surviving rights of registration of transfer or 
exchange of Notes expressly provided for herein or pursuant hereto) and the 
Trustee, on demand of and at the expense of the Company, shall execute 
proper instruments acknowledging satisfaction and discharge of this 
Indenture when

       (1)  either

            (a)  all Notes theretofore authenticated and delivered 
            (other than (i) Notes that have been destroyed, lost or stolen 
            and that have been replaced or paid as provided in Section 306 
            and (ii) Notes for whose payment money has theretofore been 
            deposited in trust with the Trustee or any Paying Agent or 
            segregated and held in trust by the Company and thereafter 
            repaid to the Company or discharged from such trust, as provided 
            in Section 1003) have been delivered to the Trustee for 
            cancellation; or

            (b)  all such Notes not theretofore delivered to the Trustee 
            for cancellation

                 (i)   have become due and payable, or

                 (ii)  will become due and payable at their Stated 
            Maturity within one year, or

                 (iii) are to be called for redemption within one year 
            under arrangements satisfactory to the Trustee for the 
            giving of notice of redemption by the Trustee in the name, 
            and at the expense, of the Company,

        and the Company, in the case of (i), (ii) or (iii) above, has 
        irrevocably deposited or caused to be deposited with the Trustee 
        as trust funds in trust for such purpose United States dollars 
        in an amount sufficient to pay and discharge the entire 
        indebtedness on such Notes not theretofore delivered to the 
        Trustee for cancellation, for principal (and premium, if any) 
        and interest to the date of such deposit (in the case of Notes 
        that have become due and payable) or to the Stated Maturity or 
        Redemption Date, as the case may be;

        (2)  the Company has paid or caused to be paid all other sums 
   payable hereunder by the Company; and

        (3)  the Company has delivered to the Trustee an Officers' 
   Certificate and an Opinion of Counsel, each stating that all 
   conditions precedent herein provided for relating to the satisfaction 
   and discharge of this Indenture have been complied with.  (Such 
   Opinion of Counsel may, as to all matters of fact, rely on, among 
   other things, such Officers' Certificate).

        Notwithstanding the satisfaction and discharge of this 
Indenture, the obligations of the Company to the Trustee under Section 607 
and, if money shall have been deposited with the Trustee pursuant to 
subclause (b) of clause (1) of this Section, the obligations of the Trustee 
under Section 402 and the last paragraph of Section 1003 shall survive.

        SECTION 402.  Application of Trust Money.
                      ---------------------------

        Subject to the provisions of the last paragraph of Section 1003, 
all money deposited with the Trustee pursuant to Section 401 shall be held 
in trust and applied by it, in accordance with the provisions of the Notes 
and this Indenture, to the payment, either directly or through any Paying 
Agent (including the Company acting as its own Paying Agent) as the Trustee 
may determine, to the Persons entitled thereto, of the principal (and 
premium, if any) and interest for whose payment such money has been 
deposited with the Trustee; but such money need not be segregated from other 
funds except to the extent required by law.



                             ARTICLE FIVE

                               REMEDIES

        SECTION 501.  Events of Default.
                      ------------------

        "Event of Default", wherever used herein, means any one of the 
following events (whatever the reason for such Event of Default and whether 
it shall be voluntary or involuntary or be effected by operation of law or 
pursuant to any judgment, decree or order of any court or any order, rule or 
regulation of any administrative or governmental body):

        (a)  default in the payment of any installment of interest on the 
   Notes when it becomes due and payable and the continuance of such 
   default for a period of 30 days;

        (b)  default in the payment of the principal of (or premium, if 
   any, on) any Note at its Stated Maturity, upon repurchase, 
   acceleration, optional redemption, required repurchase (including 
   pursuant to a Change of Control Offer or an Asset Sale Offer) or 
   otherwise, or the failure to make an offer to purchase as therein 
   required;

        (c)  failure by the Company to perform or comply with the 
   provisions of Article Eight of this Indenture;

        (d)  default in the performance, or breach, of any covenant or 
   warranty of the Company under this Indenture (other than a covenant or 
   warranty a default in whose performance or whose breach is 
   specifically dealt with in (a), (b) or (c) above) and continuance of 
   such default or breach for a period of 60 days after specified written 
   notice thereof has been given to the Company by the Trustee or to the 
   Company and the Trustee by the Holders of at least 25% of the 
   aggregate principal amount at Stated Maturity of the Outstanding 
   Notes;

        (e)  Debt of the Company or any Restricted Subsidiary of the 
   Company is not paid when due within the applicable grace period, if 
   any, or is accelerated by the holders thereof and, in either case, the 
   principal amount of such unpaid or accelerated Debt exceeds $15.0 
   million;

        (f)  the entry by a court of competent jurisdiction of one or more 
   judgments or orders against the Company or any Restricted Subsidiary 
   of the Company in an uninsured or unindemnified aggregate amount in 
   excess of $15.0 million, which remains undischarged, unwaived, 
   unstayed, unbonded or unsatisfied for a period of 60 consecutive days;


        (g)  the entry by a court having jurisdiction in the premises of 
   (i) a decree or order for relief in respect of the Company or any 
   Significant Restricted Subsidiary of the Company in an involuntary 
   case or proceeding under U.S. bankruptcy laws, as now or hereafter 
   constituted, or any other applicable federal, state, or foreign 
   bankruptcy, insolvency, or other similar law or (ii) a decree or order 
   adjudging the Company or any Significant Restricted Subsidiary of the 
   Company a bankrupt or insolvent, or approving as properly filed a 
   petition seeking reorganization, arrangement, adjustment or 
   composition of or in respect of the Company or any Significant 
   Restricted Subsidiary of the Company under U.S. bankruptcy laws, as 
   now or hereafter constituted, or any other applicable federal, state, 
   or foreign bankruptcy, insolvency, or similar law, or appointing a 
   custodian, receiver, liquidator, assignee, trustee, sequestrator or 
   other similar official of the Company or any Significant Restricted 
   Subsidiary of the Company or of any substantial part of the property 
   or assets of the Company or any Significant Restricted Subsidiary of 
   the Company or ordering the winding up or liquidation of the affairs 
   of the Company or any Significant Restricted Subsidiary of the 
   Company, and the continuance of any such decree or order for relief or 
   any such other decree or order unstayed and in effect for a period of 
   60 consecutive days; or


        (h)  (i) the commencement by the Company or any Significant 
   Restricted Subsidiary of the Company of a voluntary case or proceeding 
   Under U.S. bankruptcy laws, as now or hereafter constituted, or any 
   other applicable federal, state, or foreign bankruptcy, insolvency or 
   other similar law or of any other case or proceeding to be adjudicated 
   a bankrupt or insolvent, or (ii) the consent by the Company or any 
   Significant Restricted Subsidiary of the Company to the entry of a 
   decree or order for relief in respect of the Company or any 
   Significant Restricted Subsidiary of the Company in an involuntary 
   case or proceeding under U.S. bankruptcy laws, as now or hereafter 
   constituted, or any other applicable federal, state or foreign 
   bankruptcy, insolvency, or other similar law or to the commencement of 
   any bankruptcy or insolvency case or proceeding against the Company or 
   any Significant Restricted Subsidiary of the Company, or (iii) the 
   filing by the Company or any Significant Restricted Subsidiary of the 
   Company of a petition or answer or consent seeking reorganization or 
   relief under U.S. bankruptcy laws, as now or hereafter constituted, or 
   any other applicable federal, state, or foreign bankruptcy, insolvency 
   or other similar law, or (iv) the consent by the Company or any 
   Significant Restricted Subsidiary of the Company to the filing of such 
   petition or to the appointment of or taking possession by a custodian, 
   receiver, liquidator, assignee, trustee, sequestrator or similar 
   official of the Company or any Significant Restricted Subsidiary of 
   the Company or of any substantial part of the property or assets of 
   the Company or any Significant Restricted Subsidiary of the Company, 
   or the making by the Company or any Significant Restricted Subsidiary 
   of the Company of an assignment for the benefit of creditors, or (v) 
   the admission by the Company or any Significant Restricted Subsidiary 
   of the Company in writing of its inability to pay its debts generally 
   as they become due, or (vi) the taking of corporate action by the 
   Company or any Significant Restricted Subsidiary of the Company in 
   furtherance of any such action.

        SECTION 502.  Acceleration of Maturity; Rescission and Annulment.
                      ---------------------------------------------------

        If an Event of Default (other than an Event of Default specified 
in Section 501(g) or 501(h)) above with respect to the Company) occurs and 
is continuing, then and in every such case the Trustee or the Holders of not 
less than 25% of the outstanding aggregate principal amount at Stated 
Maturity of Notes may declare the Default Amount (as defined below) and any 
accrued and unpaid interest on all such Notes then outstanding to be 
immediately due and payable, by a notice in writing to the Company (and to 
the Trustee if given by Holders), and upon any such declaration, such 
Default Amount and any accrued and unpaid interest will become and be 
immediately due and payable.  If any Event of Default specified in Sections 
501(g) and 501(h) above with respect to the Company occurs, the Default 
Amount and any accrued and unpaid interest on all such Notes then 
outstanding, shall become immediately due and payable without any 
declaration or other act on the part of the Trustee or any Holder.  Prior to 
March 1, 2003, the Default Amount with respect to the Notes shall equal the 
Accreted Value of the Notes as of such date.  On or after March 1, 2003, the 
Default Amount with respect to the Notes shall equal 100% of the principal 
amount at Stated Majority of the Notes.

        At any time after a declaration of acceleration has been made 
and before a judgment or decree for payment of the money due has been 
obtained by the Trustee as hereinafter provided in this Article, the Holders 
of a majority in principal amount of the Notes Outstanding, by written 
notice to the Company and the Trustee, may rescind and annul such 
declaration and its consequences if:

        (1)  the Company has paid or deposited with the Trustee a sum 
   sufficient to pay,

             (A)  all overdue interest on all Outstanding Notes,

             (B)  all unpaid principal of (and premium, if any, on) any 
             Outstanding Notes that has become due otherwise than by such 
             declaration of acceleration, and interest on such unpaid 
             principal at the rate borne by the Notes,

             (C)  to the extent that payment of such interest is lawful, 
             interest on overdue interest at the rate borne by the Notes, and

             (D)  all sums paid or advanced by the Trustee hereunder and 
             the reasonable compensation, expenses, disbursements and 
             advances of the Trustee, its agents and counsel; and

        (2)  all Events of Default, other than the non-payment of amounts 
   of principal of (or premium, if any, on) or interest on Notes that 
   have become due solely by such declaration of acceleration, have been 
   cured or waived as provided in Section 513.

No such rescission shall affect any subsequent default or impair any right 
consequent thereon.

        SECTION 503. Collection of Debt and Suits for Enforcement by Trustee.
                     --------------------------------------------------------


        The Company covenants that if an Event of Default specified in 
Section 501(a) or (b) occurs, the Company will, upon demand of the Trustee, 
pay to the Trustee for the benefit of the Holders of such Notes, the whole 
amount then due and payable on such Notes for principal (and premium, if 
any) and interest, and interest on any overdue principal (and premium, if 
any) and, to the extent that payment of such interest shall be legally 
enforceable, upon any overdue installment of interest, at the rate borne by 
the Notes, and, in addition thereto, such further amount as shall be 
sufficient to cover the costs and expenses of collection, including the 
reasonable compensation, expenses, disbursements and advances of the 
Trustee, its agents and counsel.

        If the Company fails to pay such amounts forthwith upon such 
demand, the Trustee, in its own name as trustee of an express trust, may 
institute a judicial proceeding for the collection of the sums so due and 
unpaid, may prosecute such proceeding to judgment or final decree and may 
enforce the same against the Company or any other obligor upon the Notes and 
collect the moneys adjudged or decreed to be payable in the manner provided 
by law out of the property of the Company or any other obligor upon the 
Notes, wherever situated.

        If an Event of Default occurs and is continuing, the Trustee may 
in its discretion proceed to protect and enforce its rights and the rights 
of the Holders by such appropriate judicial proceedings as the Trustee shall 
deem most effectual to protect and enforce any such rights, whether for the 
specific enforcement of any covenant or agreement in this Indenture or in 
aid of the exercise of any power granted herein, or to enforce any other 
proper remedy.

        SECTION 504.  Trustee May File Proofs of Claim.
                      --------------------------------

        In case of the pendency of any receivership, insolvency, 
liquidation, bankruptcy, reorganization, arrangement, adjustment, 
composition or other similar judicial proceeding relative to the Company or 
any other obligor upon the Notes or the property of the Company or of such 
other obligor or their creditors, the Trustee (irrespective of whether the 
principal of the Notes shall then be due and payable as therein expressed or 
by declaration or otherwise and irrespective of whether the Trustee shall 
have made any demand on the Company for the payment of overdue principal, 
premium, if any, or interest) shall be entitled and empowered, by 
intervention in such proceeding or otherwise,

        (i)  to file and prove a claim for the whole amount of principal 
   (and premium, if any) and interest owing and unpaid in respect of the 
   Notes and to file such other papers or documents as may be necessary 
   or advisable in order to have the claims of the Trustee (including any 
   claim for the reasonable compensation, expenses, disbursements and 
   advances of the Trustee, its agents and counsel) and of the Holders 
   allowed in such judicial proceeding, and

        (ii) to collect and receive any moneys or other property payable 
   or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or 
similar official in any such judicial proceeding is hereby authorized by 
each Holder to make such payments to the Trustee and, in the event that the 
Trustee shall consent to the making of such payments directly to the 
Holders, to pay the Trustee any amount due it for the reasonable 
compensation, expenses, disbursements and advances of the Trustee, its 
agents and counsel, and any other amounts due the Trustee under Section 607.

        Nothing herein contained shall be deemed to authorize the 
Trustee to authorize or consent to or accept or adopt on behalf of any 
Holder any plan of reorganization, arrangement, adjustment or composition 
affecting the Notes or the rights of any Holder thereof, or to authorize the 
Trustee to vote in respect of the claim of any Holder in any such 
proceeding.

        SECTION 505.  Trustee May Enforce Claims Without Possession of Notes.
                      ------------------------------------------------------

        All rights of action and claims under this Indenture or the 
Notes may be prosecuted and enforced by the Trustee without the possession 
of any of the Notes or the production thereof in any proceeding relating 
thereto, and any such proceeding instituted by the Trustee shall be brought 
in its own name and as trustee of an express trust, and any recovery of 
judgment shall, after provision for the payment of the reasonable 
compensation, expenses, disbursements and advances of the Trustee, its 
agents and counsel, be for the ratable benefit of the Holders of the Notes 
in respect of which such judgment has been recovered.


        SECTION 506.  Application of Money Collected.
                      ------------------------------

        Any money collected by the Trustee pursuant to this Article 
shall be applied in the following order, at the date or dates fixed by the 
Trustee and, in case of the distribution of such money on account of 
principal (or premium, if any) or interest, upon presentation of the Notes 
and the notation thereon of the payment if only partially paid and upon 
surrender thereof if fully paid:

        FIRST:  To the payment of all amounts due the Trustee under 
   Section 607;

        SECOND:  To the payment of the amounts then due and unpaid for 
   principal of (and premium, if any) and interest on the Notes in 
   respect of which or for the benefit of which such money has been 
   collected, ratably, without preference or priority of any kind, 
   according to the amounts due and payable on such Notes for principal 
   (and premium, if any) and interest, respectively; and

        THIRD:  The balance, if any, to the Company.

        SECTION 507.  Limitation on Suits.
                      -------------------

        No Holder of any Notes shall have any right to institute any 
proceeding, judicial or otherwise, with respect to this Indenture, or for 
the appointment of a receiver or trustee, or for any other remedy hereunder, 
unless

        (1)  such Holder has previously given written notice to the 
   Trustee of a continuing Event of Default;

        (2)  the Holders of not less than 25% in principal amount at 
   Stated Maturity of the Outstanding Notes shall have made written 
   request to the Trustee to institute proceedings in respect of such 
   Event of Default in its own name as Trustee hereunder;

        (3)  such Holder or Holders have offered to the Trustee reasonable 
   indemnity against the costs, expenses and liabilities to be incurred 
   in compliance with such request;

        (4)  the Trustee for 60 days after its receipt of such notice, 
   request and offer of indemnity has failed to institute any such 
   proceeding; and

        (5)  no direction inconsistent with such written request has been 
   given to the Trustee during such 60-day period by the Holders of a 
   majority or more in principal amount at Stated Maturity of the 
   Outstanding Notes;

it being understood and intended that no one or more Holders shall have any 
right in any manner whatever by virtue of, or by availing of, any provision 
of this Indenture to affect, disturb or prejudice the rights of any other 
Holders, or to obtain or to seek to obtain priority or preference over any 
other Holders or to enforce any right under this Indenture, except in the 
manner herein provided and for the equal and ratable benefit of all the 
Holders.

        SECTION 508.  Unconditional Right of Holders to Receive 
                      -----------------------------------------
                      Principal, Premium and Interest.
                      -------------------------------

        Notwithstanding any other provision in this Indenture, the 
Holder of any Note shall have the right, which is absolute and 
unconditional, to receive payment, as provided herein (including, if 
applicable, Article Thirteen) and in such Note of the principal of (and 
premium, if any) and (subject to Section 307) interest on such Note on the 
respective Stated Maturities expressed in such Note (or, in the case of 
redemption, on the Redemption Date) and to institute suit for the 
enforcement of any such payment, and such rights shall not be impaired 
without the consent of such Holder.

        SECTION 509.  Restoration of Rights and Remedies.
                      ----------------------------------

        If the Trustee or any Holder has instituted any proceeding to 
enforce any right or remedy under this Indenture and such proceeding has 
been discontinued or abandoned for any reason, or has been determined 
adversely to the Trustee or to such Holder, then and in every such case, 
subject to any determination in such proceeding, the Company, the Trustee 
and the Holders shall be restored severally and respectively to their former 
positions hereunder and thereafter all rights and remedies of the Trustee 
and the Holders shall continue as though no such proceeding had been 
instituted.

        SECTION 510.  Rights and Remedies Cumulative.
                      ------------------------------

        Except as otherwise provided with respect to the replacement or 
payment of mutilated, destroyed, lost or stolen Notes in the last paragraph 
of Section 306, no right or remedy herein conferred upon or reserved to the 
Trustee or to the Holders is intended to be exclusive of any other right or 
remedy, and every right and remedy shall, to the extent permitted by law, be 
cumulative and in addition to every other right and remedy given hereunder 
or now or hereafter existing at law or in equity or otherwise.  The 
assertion or employment of any right or remedy hereunder, or otherwise, 
shall not prevent the concurrent assertion or employment of any other 
appropriate right or remedy.


        SECTION 511.  Delay or Omission Not Waiver.
                      ----------------------------

        No delay or omission of the Trustee or of any Holder of any Note 
to exercise any right or remedy accruing upon any Event of Default shall 
impair any such right or remedy or constitute a waiver of any such Event of 
Default or an acquiescence therein.  Every right and remedy given by this 
Article or by law to the Trustee or to the Holders may be exercised from 
time to time, and as often as may be deemed expedient, by the Trustee or by 
the Holders, as the case may be.

        SECTION 512.  Control by Holders.
                      ------------------

        The Holders of not less than a majority in principal amount at 
Stated Maturity of the Outstanding Notes shall have the right to direct the 
time, method and place of conducting any proceeding for any remedy available 
to the Trustee, or exercising any trust or power conferred on the Trustee, 
provided that

        (1)  such direction shall not be in conflict with any rule of law 
   or with this Indenture or any Note, 

        (2)  the Trustee may take any other action deemed proper by the 
   Trustee that is not inconsistent with such direction, and

        (3)  the Trustee need not take any action that might involve it in 
   personal liability or be unjustly prejudicial to the Holders not 
   consenting.

        SECTION 513.  Waiver of Past Defaults.
                      -----------------------

        The Holders of not less than a majority in principal amount at 
Stated Maturity of the Outstanding Notes may on behalf of the Holders of all 
the Notes waive (including by way of consents obtained with a purchase of, 
or a tender or exchange offer for, Notes) any past default hereunder and its 
consequences, except a default

        (1)  in respect of the payment of the principal of (or premium, if 
   any) or interest on any Note, or

        (2)  in respect of a covenant or provision hereof that under 
   Article Nine cannot be modified or amended without the consent of the 
   Holder of each Outstanding Note affected.

        Upon any such waiver, such default shall cease to exist, and any 
Event of Default arising therefrom shall be deemed to have been cured, for 
every purpose of this Indenture; but no such waiver shall extend to any 
subsequent or other default or Event of Default or impair any right 
consequent thereon.

        SECTION 514.  Waiver of Stay or Extension Laws.
                      --------------------------------

        The Company covenants (to the extent that it may lawfully do so) 
that it will not at any time insist upon, or plead, or in any manner 
whatsoever claim or take the benefit or advantage of, any stay or extension 
law wherever enacted, now or at any time hereafter in force, that may affect 
the covenants or the performance of this Indenture; and the Company (to the 
extent that it may lawfully do so) hereby expressly waives all benefit or 
advantage of any such law and covenants that it will not hinder, delay or 
impede the execution of any power herein granted to the Trustee, but will 
suffer and permit the execution of every such power as though no such law 
had been enacted.

        SECTION 515.  Undertaking for Costs.
                      ---------------------

All parties to this Indenture agree, and each Holder of any Note 
by such Holder's acceptance thereof shall be deemed to have agreed, that any 
court may in its discretion require in any suit for the enforcement of any 
right or remedy under this Indenture or the Notes, or in any suit against 
the Trustee for any action taken, suffered or omitted by it as Trustee, the 
filing by any party litigant in such suit of an undertaking to pay the costs 
of such suit, and that such court may in its discretion assess reasonable 
costs, including reasonable attorneys' fees, against any party litigant in 
such suit, having due regard to the merits and good faith of the claims or 
defenses made by such party litigant; but the provisions of this Section 515 
shall not apply to any suit instituted by the Trustee, to any suit 
instituted by any Holder, or group of Holders, holding in the aggregate more 
than 10% in principal amount at Stated Maturity of the Outstanding Notes or 
to any suit instituted by any Holder for the enforcement of the payment of 
the principal of, premium, if any, or interest on any Note on or after the 
respective Stated Maturity expressed in such Note.


                                 ARTICLE SIX

                                 THE TRUSTEE

        SECTION 601.  Certain Duties and Responsibilities.
                      -----------------------------------

        (1)  Except during the continuance of an Event of Default,

             (a)  the  Trustee undertakes to perform such duties and only 
        such duties as are specifically set forth in this Indenture, and 
        no implied covenants or obligations shall be read into this 
        Indenture against the Trustee; and

             (b)  in the absence of bad faith on its part, the Trustee 
        may rely conclusively, as to the truth of the statements and the 
        correctness of the opinions expressed therein, upon certificates 
        or opinions furnished to the Trustee and conforming to the 
        requirements of this Indenture; but in the case of any such 
        certificates or opinions that by any provision hereof 
        specifically are required to be furnished to the Trustee, the 
        Trustee shall be under a duty to examine the same to determine 
        whether or not they conform to the requirements of this 
        Indenture.

        (2)  If an Event of Default has occurred and is continuing, the 
   Trustee shall exercise the rights and powers vested in it by this 
   Indenture, and use the same degree of care and skill in their exercise 
   as a prudent person would exercise or use under the circumstances in 
   the conduct of such person's own affairs.

        (3)  No provision of this Indenture shall be construed to relieve 
   the Trustee from liability for its own negligent action, its own 
   negligent failure to act, or its own willful misconduct, except that

            (a)  this Subsection shall not be construed to limit the 
        effect of Subsection (1) of this Section;

            (b)  the Trustee shall not be liable for any error of 
        judgment made in good faith by a Responsible Officer, unless it 
        shall be proved that the Trustee was negligent in ascertaining 
        the pertinent facts;

            (c)  the Trustee shall not be liable with respect to any 
        action taken or omitted to be taken by it in good faith in 
        accordance with the direction of the Holders of a majority in 
        principal amount at Stated Maturity of the Outstanding Notes 
        relating to the time, method and place of conducting any 
        proceeding for any remedy available to the Trustee, or 
        exercising any trust or power conferred upon the Trustee, under 
        this Indenture; and

           (d)  the Trustee shall not be required to expend or risk its 
        own funds or otherwise incur any financial liability in the 
        performance of any of its duties hereunder, or in the exercise 
        of any of its rights or powers, if it shall have reasonable 
        grounds for believing that repayment of such funds or adequate 
        indemnity against such risk or liability is not reasonably 
        assured to it.

        SECTION 602.  Notice of Defaults.
                      ------------------
        Within 90 days after the occurrence of any Default hereunder, 
the Trustee shall transmit in the manner and to the extent provided in TIA 
Section 313(c), notice of such Default hereunder known to the Trustee, 
unless such Default shall have been cured or waived; provided, however, 
that, except in the case of a Default in the payment of the principal of (or 
premium, if any) or interest on any Note, the Trustee shall be protected in 
withholding such notice if and so long as the board of directors, the 
executive committee or a trust committee of directors and/or Responsible 
Officers of the Trustee in good faith determines that the withholding of 
such notice is in the interest of the Holders; and provided further that in 
the case of any Default of the character specified in Section 501(d), no 
such notice to Holders shall be given until at least 60 days after the 
occurrence thereof. 

        SECTION 603.  Certain Rights of Trustee.
                      -------------------------

        Subject to the provisions of TIA Sections 315(a) through 315(d):

        (1)  the Trustee may rely and shall be protected in acting or 
   refraining from acting upon any resolution, certificate, statement, 
   instrument, opinion, report, notice, request, direction, consent, 
   order, bond, debenture, note, other evidence of indebtedness or other 
   paper or document reasonably believed by it to be genuine and to have 
   been signed or presented by the proper party or parties;

        (2)  any request or direction of the Company mentioned herein 
   shall be sufficiently evidenced by a Company Request or Company Order 
   and any resolution of the Board of Directors may be sufficiently 
   evidenced by a Board Resolution;

        (3)  whenever in the administration of this Indenture the Trustee 
   shall deem it desirable that a matter be proved or established prior 
   to taking, suffering or omitting any action hereunder, the Trustee 
   (unless other evidence be herein specifically prescribed) may, in the 
   absence of bad faith on its part, rely upon an Officers' Certificate;
  
        (4)  the Trustee may consult with counsel and the written advice 
   of such counsel or any Opinion of Counsel shall be full and complete 
   authorization and protection in respect of any action taken, suffered 
   or omitted by it hereunder in good faith and in reliance thereon;


        (5)  the Trustee shall be under no obligation to exercise any of 
   the rights or powers vested in it by this Indenture at the request or 
   direction of any of the Holders pursuant to this Indenture, unless 
   such Holders shall have offered to the Trustee reasonable security or 
   indemnity against the costs, expenses and liabilities that might be 
   incurred by it in compliance with such request or direction;

        (6)  the Trustee shall not be bound to make any investigation into 
   the facts or matters stated in any resolution, certificate, statement, 
   instrument, opinion, report, notice, request, direction, consent, 
   order, bond, debenture, note, other evidence of indebtedness or other 
   paper or document, but the Trustee, in its discretion, may make such 
   further inquiry or investigation into such facts or matters as it may 
   see fit; and

        (7)  the Trustee may execute any of the trusts or powers hereunder 
   or perform any duties hereunder either directly or by or through 
   agents or attorneys and the Trustee shall not be responsible for any 
   misconduct or negligence on the part of any agent or attorney (other 
   than an agent or attorney who is an employee of the Trustee) appointed 
   with due care by it hereunder.

        SECTION 604.  Trustee Not Responsible for Recitals or Issuance 
                      ------------------------------------------------
                      of Notes.
                      --------

        The recitals contained herein and in the Notes, except for the 
Trustee's certificates of authentication, shall be taken as the statements 
of the Company, and the Trustee assumes no responsibility for their 
correctness.  The Trustee makes no representations as to the validity or 
sufficiency of this Indenture or of the Notes, except that the Trustee 
represents that it is duly authorized to execute and deliver this Indenture, 
authenticate the Notes and perform its obligations hereunder and that the 
statements made by it in a Statement of Eligibility and Qualification on 
Form T-1 supplied to the Company are true and accurate, subject to the 
qualifications set forth therein.  The Trustee shall not be accountable for 
the use or application by the Company of Notes or the proceeds thereof.

        SECTION 605.  May Hold Notes.
                      --------------

        The Trustee, any Paying Agent, any Note Registrar or any other 
agent of the Company or of the Trustee, in its individual or any other 
capacity, may become the owner or pledgee of Notes and, subject to TIA 
Sections 310(b) and 311, may otherwise deal with the Company with the same 
rights it would have if it were not Trustee, Paying Agent, Note Registrar or 
such other agent.

        SECTION 606.  Money Held in Trust.
                      -------------------

        Money held by the Trustee in trust hereunder shall, until used 
or applied as herein provided, be held in trust for the purposes for which 
it was received, but need not be segregated from other funds except to the 
extent required by law.  The Trustee shall be under no liability for 
interest on any money received by it hereunder except as otherwise agreed 
with the Company.

        SECTION 607.  Compensation and Reimbursement.
                      ------------------------------

        The Company agrees:

        (1)  to pay to the Trustee from time to time reasonable 
   compensation for all services rendered by it hereunder (which 
   compensation shall not be limited by any provision of law in regard to 
   the compensation of a trustee of an express trust);

        (2)  except as otherwise expressly provided herein, to reimburse 
   the Trustee upon its request for all reasonable expenses, 
   disbursements and advances incurred or made by the Trustee in 
   accordance with any provision of this Indenture (including the 
   reasonable compensation and the expenses and disbursements of its 
   agents and counsel), except any such expense, disbursement or advance 
   as may arise from or be attributable to its negligence or bad faith; 
   and

        (3)  to indemnify the Trustee for, and to hold it harmless 
   against, any loss, liability or expense incurred without negligence or 
   bad faith on its part or on the part of its directors, officers, 
   employees and agents, arising out of or in connection with the 
   acceptance or administration of this trust, including the costs and 
   expenses of defending itself, and of indemnifying its directors, 
   officers, employees and agents, against any claim or liability in 
   connection with the exercise or performance of any of the Trustee's 
   powers or duties hereunder.

        The Trustee shall notify the Company promptly of any claim 
asserted against the Trustee for which it may seek indemnity.  The 
obligations of the Company under this Section to compensate the Trustee, to 
pay or reimburse the Trustee for expenses, disbursements and advances and to 
indemnify and hold harmless the Trustee shall constitute additional 
indebtedness hereunder and shall survive the satisfaction and discharge of 
this Indenture.  As security for the performance of such obligations of the 
Company, the Trustee shall have a claim prior to the Notes upon all property 
and funds held or collected by the Trustee as such, except funds held in 
trust for the payment of principal of (and premium, if any) or interest on 
particular Notes.

        When the Trustee incurs expenses or renders services in 
connection with an Event of Default specified in Section 501(g) or (h), the 
expenses (including the reasonable charges and expenses of its counsel) of 
and the compensation for such services are intended to constitute expenses 
of administration under any applicable Federal or State bankruptcy, 
insolvency or other similar law.

        The provisions of this Section shall survive the termination of 
this Indenture.

        SECTION 608.  Corporate Trustee Required; Eligibility.
                      ---------------------------------------

        There shall be at all times a Trustee hereunder that shall be 
eligible to act as Trustee under TIA Section 310(a)(1) and 310(a)(5) and 
shall have a combined capital and surplus of at least $50,000,000.  If such 
corporation publishes reports of condition at least annually, pursuant to 
law or to the requirements of Federal, State, territorial or District of 
Columbia supervising or examining authority, then for the purposes of this 
Section, the combined capital and surplus of such corporation shall be 
deemed to be its combined capital and surplus as set forth in its most 
recent report of condition so published.  If at any time the Trustee shall 
cease to be eligible in accordance with the provisions of this Section, it 
shall resign immediately in the manner and with the effect hereinafter 
specified in this Article.

        SECTION 609.  Resignation and Removal; Appointment of Successor.
                      -------------------------------------------------

        (a)  No resignation or removal of the Trustee and no appointment 
of a successor Trustee pursuant to this Article shall become effective until 
the acceptance of appointment by the successor Trustee in accordance with 
the applicable requirements of Section 610.

        (b)  The Trustee may resign at any time by giving written notice 
thereof to the Company.  If the instrument of acceptance by a successor 
Trustee required by Section 610 shall not have been delivered to the Trustee 
within 30 days after the giving of such notice of resignation, the resigning 
Trustee may petition any court of competent jurisdiction for the appointment 
of a successor Trustee.

        (c)  The Trustee may be removed at any time by Act of the Holders 
of not less than a majority in principal amount at Stated Maturity of the 
Outstanding Notes, delivered to the Trustee and to the Company.

        (d)  If at any time:

        (1)  the Trustee shall fail to comply with the provisions of TIA 
   Section 310(b) after written request therefor by the Company or by any 
   Holder who has been a bona fide Holder of a Note for at least six 
   months, or

        (2)  the Trustee shall cease to be eligible under Section 608 and 
   shall fail to resign after written request therefor by the Company or 
   by any Holder who has been a bona fide Holder of a Note for at least 
   six months, or

        (3)  the Trustee shall become incapable of acting or shall be 
   adjudged a bankrupt or insolvent or a receiver of the Trustee or of 
   its property shall be appointed or any public officer shall take 
   charge or control of the Trustee or of its property or affairs for the 
   purpose of rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company, by a Board Resolution, may remove 
the Trustee, or (ii) subject to TIA Section 315(e), any Holder who has been 
a bona fide Holder of a Note for at least six months may, on behalf of 
himself and all others similarly situated, petition any court of competent 
jurisdiction for the removal of the Trustee and the appointment of a 
successor Trustee.

        (e)  If the Trustee shall resign, be removed or become incapable 
of acting, or if a vacancy shall occur in the office of Trustee for any 
cause, the Company, by a Board Resolution, shall promptly appoint a 
successor Trustee.  If, within one year after such resignation, removal or 
incapability, or the occurrence of such vacancy, a successor Trustee shall 
be appointed by Act of the Holders of a majority in principal amount at 
Stated Maturity of the Outstanding Notes delivered to the Company and the 
retiring Trustee, the successor Trustee so appointed shall, forthwith upon 
its acceptance of such appointment, become the successor Trustee and 
supersede the successor Trustee appointed by the Company.  If no successor 
Trustee shall have been so appointed by the Company or the Holders and 
accepted appointment in the manner hereinafter provided, any Holder who has 
been a bona fide Holder of a Note for at least six months may, on behalf of 
himself and all others similarly situated, petition any court of competent 
jurisdiction for the appointment of a successor Trustee.

        (f)  The Company shall give notice of each resignation and each 
removal of the Trustee and each appointment of a successor Trustee to the 
Holders of Notes in the manner provided for in Section 106.  Each notice 
shall include the name of the successor Trustee and the address of its 
Corporate Trust Office.

        SECTION 610.  Acceptance of Appointment by Successor.
                      --------------------------------------

        Every successor Trustee appointed hereunder shall execute, 
acknowledge and deliver to the Company and to the retiring Trustee an 
instrument accepting such appointment, and thereupon the resignation or 
removal of the retiring Trustee shall become effective and such successor 
Trustee, without any further act, deed or conveyance, shall become vested 
with all the rights, powers, trusts and duties of the retiring Trustee; but, 
on request of the Company or the successor Trustee, such retiring Trustee 
shall, upon payment of its charges, execute and deliver an instrument 
transferring to such successor Trustee all the rights, powers and trusts of 
the retiring Trustee and shall duly assign, transfer and deliver to such 
successor Trustee all property and money held by such retiring Trustee 
hereunder.  Upon reasonable request of any such successor Trustee, the 
Company shall execute any and all instruments for more fully and certainly 
vesting in and confirming to such successor Trustee all such rights, powers 
and trusts.

        No successor Trustee shall accept its appointment unless at the 
time of such acceptance such successor Trustee shall be qualified and 
eligible under this Article.

        SECTION 611.  Merger, Conversion, Consolidation or Succession to 
                      --------------------------------------------------
                      Business.
                      --------

        Any corporation into which the Trustee may be merged or converted 
or with which it may be consolidated, or any corporation resulting from 
any merger, conversion or consolidation to which the Trustee shall be a 
party, or any corporation succeeding to all or substantially all of the 
corporate trust business of the Trustee, shall be the successor of the 
Trustee hereunder, provided such corporation shall be otherwise qualified 
and eligible under this Article, without the execution or filing of any 
paper or any further act on the part of any of the parties hereto.  In case 
any Notes shall have been authenticated, but not delivered, by the Trustee 
then in office, any successor by merger, conversion or consolidation to such 
authenticating Trustee may adopt such authentication and deliver the Notes 
so authenticated with the same effect as if such successor Trustee had 
itself authenticated such Notes.  In case at that time any of the Notes 
shall not have been authenticated, any successor Trustee may authenticate 
such Notes either in the name of any predecessor hereunder or in the name of 
the successor Trustee.  In all such cases such certificates shall have the 
full force and effect that this Indenture provides for the certificate of 
authentication of the Trustee; provided, however, that the right to adopt 
                               --------  -------
the certificate of authentication of any predecessor Trustee or to 
authenticate Notes in the name of any predecessor Trustee shall apply only 
to its successor or successors by merger, conversion or consolidation.

        SECTION 612.  Conflicting Interests.
                      ---------------------
 
        The Trustee shall be subject to and comply with the provisions 
of Section [310(b)] of the TIA.

        SECTION 613.  Preferential Collection of Claims Against Issuers.
                      -------------------------------------------------

        The Trustee shall comply with Section 311(a) of the TIA, 
excluding any creditor relationship listed in Section 311(b) of the TIA.  If 
the present or any future Trustee shall resign or be removed, it shall be 
subject to Section 311(a) of the TIA to the extent provided therein.



                                     ARTICLE SEVEN
 
                 HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

        SECTION 701.  Disclosure of Names and Addresses of Holders.
                      --------------------------------------------

        Every Holder of Notes, by receiving and holding the same, agrees 
with the Company and the Trustee that none of the Company or the Trustee or 
any agent of either of them shall be held accountable by reason of the 
disclosure of any such information as to the names and addresses of the 
Holders in accordance with TIA Section 312, regardless of the source from 
which such information was derived, and that the Trustee shall not be held 
accountable by reason of mailing any material pursuant to a request made 
under TIA Section 312(b).

        SECTION 702.  Reports by Trustee.
                      ------------------

        Within 60 days after May 15 of each year commencing with the 
first May 15 after the first issuance of Notes, the Trustee shall transmit 
to the Holders, in the manner and to the extent provided in TIA Section 
313(c), a brief report dated as of such May 15 if required by TIA Section 
313(a).

        SECTION 703.  Reports by Company.
                      ------------------

        The Company shall:

        (1)  whether or not the Company is subject to Section 13(a) or 
   15(d) of the Securities Exchange Act of 1934, as amended, or any 
   successor provision thereto, file with the Commission the annual 
   reports, quarterly reports and other documents that the Company would 
   have been required to file with the Commission pursuant to such 
   Section 13(a), 15(d) or any successor provision thereto if the Company 
   were subject thereto and shall file such documents with the Commission 
   on or prior to the respective dates (the "Required Filing Dates") by 
   which the Company would have been required to file them;

        (2)  whether or not the Company is subject to Section 13(a) or 
   15(d) of the Securities Exchange Act of 1934, as amended, or any 
   successor provision thereto, within 15 days of each Required Filing 
   Date, file with the Trustee copies of the annual reports, quarterly 
   reports and other documents (without exhibits) that the Company would 
   have been required to file with the Commission pursuant to Section 
   13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, or 
   any successor provisions thereto if the Company was subject thereto;

        (3)  file with the Trustee and the Commission, in accordance with 
   rules and regulations prescribed from time to time by the Commission, 
   such additional information, documents and reports with respect to 
   compliance by the Company with the conditions and covenants of this 
   Indenture as may be required from time to time by such rules and 
   regulations; and

        (4)  transmit by mail to all Holders, in the manner and to the 
   extent provided in TIA Section 313(c), within 15 days after the filing 
   thereof with the Commission, such summaries of any information, 
   documents and reports required to be filed by the Company pursuant to 
   paragraphs (1), (2) and (3) of this Section as may be required by 
   rules and regulations prescribed from time to time by the Commission.

        If the Company is not permitted under the Exchange Act to file 
with the Commission such reports and other information referred to in 
Section 703(1), the Company shall promptly upon written request supply 
copies of such documents (without exhibits) to prospective purchasers of the 
Notes or their representatives.


                                ARTICLE EIGHT

            CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

        SECTION 801.  Company May Consolidate, Etc., Only on Certain Terms.
                      ----------------------------------------------------

        The Company shall not, in any transaction or series of 
transactions, consolidate with or merge into any other Person (other than a 
merger of a Restricted Subsidiary into the Company in which the Company is 
the continuing corporation), or sell, convey, assign, transfer, lease or 
otherwise dispose of all or substantially all of the property and assets of 
the Company and its Restricted Subsidiaries taken as a whole to any other 
person, and the Company shall not permit any of its Restricted Subsidiaries 
to enter into any such transaction or series of related transactions if such 
transaction or series of related transactions, in the aggregate, would 
result in a sale, assignment, transfer, lease, conveyance or other 
disposition of all or substantially all of the property and assets of the 
Company and its Restricted Subsidiaries, taken as a whole, to another 
Person, unless:


        (a)  either (i) the Company shall be the continuing corporation or 
   (ii) the corporation (if other than the Company) formed by such 
   consolidation or into which the Company is merged, or the Person that 
   acquires, by sale, assignment, conveyance, transfer, lease or 
   disposition, all or substantially all of the property and assets of 
   the Company and its Restricted Subsidiaries taken as a whole (such 
   corporation or Person, the "Surviving Entity"), shall be a corporation 
   organized and validly existing under the laws of the United States of 
   America, any political subdivision thereof or any state thereof or the 
   District of Columbia, and shall expressly assume, by a supplemental 
   indenture, the due and punctual payment of the principal of (and 
   premium, if any) and interest on all the Notes and the performance of 
   the Company's covenants and obligations under this Indenture;

        (b)  immediately before and after giving effect to such 
   transaction or series of transactions on a pro forma basis (including, 
   without limitation, any Debt incurred or anticipated to be incurred in 
   connection with or in respect of such transaction or series of 
   transactions), no Default or Event of Default shall have occurred and 
   be continuing or would result therefrom; 

        (c)  immediately after giving effect to any such transaction or 
   series of transactions on a pro forma basis (including, without 
   limitation, any Debt incurred or anticipated to be incurred in 
   connection with or in respect of such transaction or series of 
   transactions), as if such transaction or series of transactions had 
   occurred on the first day of the determination period, the Company (or 
   the Surviving Entity if the Company is not continuing) would be 
   permitted to incur $1.00 of additional Debt pursuant to clause (o) of 
   the definition of "Permitted Debt"; and

        (d)  the Company or such Person shall have delivered to the 
   Trustee an Officers' Certificate and an Opinion of Counsel, each 
   stating that such consolidation, merger, conveyance, transfer or lease 
   and, if a supplemental indenture is required in connection with such 
   transaction, such supplemental indenture, comply with this Article and 
   that all conditions precedent herein provided for relating to such 
   transaction have been complied with.  

        Notwithstanding the foregoing, the Company may merge with an 
Affiliate incorporated or organized for the sole purpose of reincorporating 
or reorganizing the Company in another jurisdiction to realize tax or other 
benefits provided such merger meets the requirements of clauses (a), (b) and 
(d) of the preceding paragraphs.

        Upon any transaction or series of transactions that are of the 
type described in, and are effected in accordance with, the foregoing 
paragraphs, the Surviving Entity (if other than the Company) shall succeed 
to, and be substituted for, and may exercise every right and power of, the 
Company under this Indenture and the Notes with the same effect as if such 
Surviving Entity had been named as the Company herein; and when a Surviving 
Person duly assumes all of the obligations and covenants of the Company 
pursuant to this Indenture and the Notes, except in the case of a lease, the 
predecessor Person shall be relieved of all such obligations.


        SECTION 802.  Successor Substituted.
                      ---------------------

        Upon any consolidation of the Company with or merger of the 
Company with or into any other corporation or any conveyance, transfer or 
lease of the properties and assets of the Company substantially as an 
entirety to any Person in accordance with Section 801, the successor Person 
formed by such consolidation or into which the Company is merged or to which 
such conveyance, transfer or lease is made shall succeed to, and be 
substituted for, and may exercise every right and power of, the Company 
under this Indenture with the same effect as if such successor Person had 
been named as the Company herein, and in the event of any such conveyance or 
transfer, the Company (which term shall for this purpose mean the Person 
named as the "Company" in the first paragraph of this Indenture or any 
successor Person that shall theretofore become such in the manner described 
in Section 801), except in the case of a lease, shall be discharged of all 
obligations and covenants under this Indenture and the Notes and may be 
dissolved and liquidated.


                                  ARTICLE NINE

                            SUPPLEMENTAL INDENTURES

        SECTION 901.  Supplemental Indentures Without Consent of Holders.
                      --------------------------------------------------

        Without notice to or the consent of any Holders, the Company, 
when authorized by a Board Resolution, and the Trustee, at any time and from 
time to time, may amend, waive or supplement this Indenture and the Notes 
and (if necessary) enter into one or more indentures supplemental hereto, in 
form reasonably satisfactory to the Trustee, for any of the following 
purposes:

        (1)  to evidence the succession of another Person to the Company 
   and the assumption by any such successor of the covenants of the 
   Company contained herein or in the Notes, or

        (2)  to add to the covenants of the Company for the benefit of the 
   Holders or to surrender any right or power herein conferred upon the 
   Company, or

        (3)  to add any additional Events of Default, or

        (4)  to evidence and provide for the acceptance of appointment 
   hereunder by a successor Trustee pursuant to the requirements of 
   Section 610, or

        (5)  to cure any ambiguity, to correct or supplement any provision 
   herein that may be inconsistent with any other provision herein or in 
   the Notes, or to add any other provisions with respect to matters or 
   questions arising under this Indenture or the Notes; provided that 
                                                        --------
   such action shall not adversely affect the interests of the Holders in 
   any material respect, or

        (6)  to secure the Notes pursuant to the requirements of 
   Section 1015 or otherwise, or

        (7)  to provide for uncertificated Notes in addition to or in 
   place of certificated Notes, or

        (8)  to change or eliminate any of the provisions herein or in the 
   Notes;  provided that any such change or elimination shall become 
           --------
   effective only when there is not Outstanding any Note created prior to 
   the execution of such amendment, waiver or supplemental indenture that 
   is entitled to the benefit of such provision, or

        (9)  to comply with the requirements of the Commission in order to 
   effect or maintain the qualification of this Indenture under the Trust 
   Indenture Act.  

        SECTION 902.  Supplemental Indentures with Consent of Holders.
                      -----------------------------------------------

        With the consent (including consents obtained with a purchase 
of, or a tender or exchange offer for, Notes) of the Holders of not less 
than a majority in principal amount at Stated Maturity of the Outstanding 
Notes, by Act of said Holders delivered to the Company and the Trustee, the 
Company, when authorized by a Board Resolution, and the Trustee may amend, 
waive or supplement this Indenture and the Notes and (if necessary) enter 
into an indenture or indentures supplemental hereto for the purpose of 
adding any provisions to or changing in any manner or eliminating any of the 
provisions of this Indenture or of modifying in any manner the rights of the 
Holders under this Indenture; provided, however, that no such supplemental 
                              --------  -------
indenture shall, without the consent (including consents obtained with a 
purchase of, or a tender or exchange offer for, Notes) of the Holder of each 
Outstanding Note affected thereby:

        (1)  change the Stated Maturity of the principal of or any 
   installment of interest on any Note, or reduce the principal amount 
   thereof (or premium, if any) or the rate of interest thereon or reduce 
   the amount that would be due and payable upon a declaration of 
   acceleration of the Maturity thereof pursuant to Section 502 or the 
   amount thereof provable in bankruptcy pursuant to Section 504 or 
   change the coin or currency in which any Note or any premium or the 
   interest thereon is payable, or impair the right to institute suit for 
   the enforcement of any such payment after the Stated Maturity thereof 
   (or, in the case of redemption, on or after the Redemption Date), or

        (2)  reduce the percentage in principal amount at Stated Maturity 
   of the Outstanding Notes, the consent of whose Holders is required for 
   any such supplemental indenture, or the consent of whose Holders is 
   required for any waiver of compliance with certain provisions of this 
   Indenture or certain defaults hereunder and their consequences 
   provided for in this Indenture, or

        (3)  modify the obligations of the Company to make offers to 
   purchase Notes in accordance with Sections 1009 and 1016, or
  
        (4)  subordinate in right of payment, or otherwise subordinate, 
   the Notes to any other Debt, or

        (5)  modify any provisions of this Indenture relating to the 
   calculation of Accreted Value, or

        (6)  modify any of the provisions of this Section or Sections 513 
   and 1018, except to increase any such percentage or to provide that 
   certain other provisions of this Indenture cannot be modified or 
   waived without the consent of the Holder of each Outstanding Note 
   affected hereby.

        It shall not be necessary for any Act of Holders under this 
Section to approve the particular form of any proposed supplemental 
indenture, but it shall be sufficient if such Act shall approve the 
substance thereof.

        SECTION 903.  Execution of Supplemental Indentures.
                      ------------------------------------


        In executing, or accepting the additional trusts created by, any 
supplemental indenture permitted by this Article or the modifications 
thereby of the trusts created by this Indenture, the Trustee shall be 
entitled to receive, and shall be fully protected in relying upon, an 
Opinion of Counsel stating that the execution of such supplemental indenture 
is authorized or permitted by this Indenture.  The Trustee may, but shall 
not be obligated to, enter into any such supplemental indenture that affects 
the Trustee's own rights, duties or immunities under this Indenture or 
otherwise.

        SECTION 904.  Effect of Supplemental Indentures.
                      ---------------------------------

        Upon the execution of any supplemental indenture under this 
Article, this Indenture shall be modified in accordance therewith, and such 
supplemental indenture shall form a part of this Indenture for all purposes; 
and every Holder of Notes theretofore or thereafter authenticated and 
delivered hereunder shall be bound thereby.

        SECTION 905.  Conformity with Trust Indenture Act.
                      -----------------------------------

        Every supplemental indenture executed pursuant to the Article 
shall conform to the requirements of the Trust Indenture Act as then in 
effect if this Indenture shall then be required to be qualified under the 
TIA.

        SECTION 906.  Reference in Notes to Supplemental Indentures.
                      ---------------------------------------------

        Notes authenticated and delivered after the execution of any 
supplemental indenture pursuant to this Article may, and shall if required 
by the Trustee, bear a notation in form approved by the Trustee as to any 
matter provided for in such supplemental indenture.  If the Company shall so 
determine, replacement Notes so modified as to conform, in the opinion of 
the Trustee and the Company, to any such supplemental indenture may be 
prepared and executed by the Company and authenticated and delivered by the 
Trustee in exchange for Outstanding Notes.

        SECTION 907.  Notice of Supplemental Indentures.
                      ---------------------------------

        Reasonably promptly after the execution by the Company and the 
Trustee of any supplemental indenture pursuant to the provisions of Section 
902, the Company shall give notice thereof to the Holders of each 
Outstanding Note affected, in the manner provided for in Section 106, 
setting forth in general terms the substance of such supplemental indenture.  
Any failure of the Company to mail such notice, or any defect therein, shall 
not, however, in any way impair or affect the validity of any supplemental 
indenture or effectiveness of any such amendment, supplement or waiver.

        SECTION 908.  Effect of Consents.
                      ------------------

        Until an amendment, supplement or waiver becomes effective, a 
consent to it by a Holder is a continuing consent by the Holder and every 
subsequent Holder of that Note or portion of that Note that evidences the 
same debt as the consenting Holder's Note, even if notation of the consent 
is not made on any Note.  After an amendment, supplement or waiver becomes 
effective, it shall bind every Holder of Notes. 



                                ARTICLE TEN

                                 COVENANTS

        SECTION 1001.  Payment of Principal, Premium, if Any, and Interest.
                       ---------------------------------------------------

        The Company covenants and agrees for the benefit of the Holders 
that it will duly and punctually pay the principal of (and premium, if any) 
and interest on the Notes in accordance with the terms of the Notes and this 
Indenture.

        SECTION 1002.  Maintenance of Office or Agency.
                       -------------------------------

        The Company will maintain in The City of New York, an office or 
agency where Notes may be presented or surrendered for payment, where Notes 
may be surrendered for registration of transfer or exchange and where 
notices and demands to or upon the Company in respect of the Notes and this 
Indenture may be served.  The Trustee's New York Corporate Trust Office at 
40 Broad Street, 5th Floor, Suite 550, New York, New York 10004 shall be 
such office or agency of the Company, unless the Company shall designate and 
maintain some other office or agency for one or more of such purposes.  The 
Company will give prompt written notice to the Trustee of any change in the 
location of any such office or agency.  If at any time the Company shall 
fail to maintain any such required office or agency or shall fail to furnish 
the Trustee with the address thereof, such presentations, surrenders, 
notices and demands may be made or served at the Corporate Trust Office of 
the Trustee, and the Company hereby appoints the Trustee as its agent to 
receive all such presentations, surrenders, notices and demands.

        The Company may also from time to time designate one or more 
other offices or agencies (in or outside of The City of New York) where the 
Notes may be presented or surrendered for any or all such purposes and may 
from time to time rescind any such designation; provided, however, that no 
                                                --------  -------
such designation or rescission shall in any manner relieve the Company of 
its obligation to maintain an office or agency in The City of New York for 
such purposes.  The Company will give prompt written notice to the Trustee 
of any such designation or rescission and any change in the location of any 
such other office or agency.

        SECTION 1003.  Money for Note Payments to Be Held in Trust.
                       -------------------------------------------

        If the Company shall at any time act as its own Paying Agent, it 
will, on or before each due date of the principal of (or premium, if any) or 
interest on any of the Notes, segregate and hold in trust for the benefit of 
the Persons entitled thereto a sum sufficient to pay the principal of (or 
premium, if any) or interest so becoming due until such sums shall be paid 
to such Persons or otherwise disposed of as herein provided and will 
promptly notify the Trustee of its action or failure so to act.

        Whenever the Company shall have one or more Paying Agents for 
the Notes, it will, on or before each due date of the principal of (or 
premium, if any) or interest on any Notes, deposit with a Paying Agent a sum 
sufficient to pay the principal (and premium, if any) or interest so 
becoming due, such sum to be held in trust for the benefit of the Persons 
entitled to such principal, premium or interest, and (unless such Paying 
Agent is the Trustee) the Company will promptly notify the Trustee of such 
action or any failure so to act.

        The Company will cause each Paying Agent (other than the Company 
or the Trustee) to execute and deliver to the Trustee an instrument in which 
such Paying Agent shall agree with the Trustee, subject to the provisions of 
this Section, that such Paying Agent will:

        (1)  hold all sums held by it for the payment of the principal of 
   (and premium, if any) or interest on Notes in trust for the benefit of 
   the Persons entitled thereto until such sums shall be paid to such 
   Persons or otherwise disposed of as herein provided;

        (2)  give the Trustee notice of any default by the Company (or any 
   other obligor upon the Notes) in the making of any payment of 
   principal (and premium, if any) or interest; and

        (3)  at any time during the continuance of any such default, upon 
   the written request of the Trustee, forthwith pay to the Trustee all 
   sums so held in trust by such Paying Agent.

        The Company may at any time, for the purpose of obtaining the 
satisfaction and discharge of this Indenture or for any other purpose, pay, 
or by Company Order direct any Paying Agent to pay, to the Trustee all sums 
held in trust by the Company or such Paying Agent, such sums to be held by 
the Trustee upon the same trusts as those upon which such sums were held by 
the Company or such Paying Agent; and, upon such payment by any Paying Agent 
to the Trustee, such Paying Agent shall be released from all further 
liability with respect to such sums.


        Any money deposited with the Trustee or any Paying Agent, or 
then held by the Company, in trust for the payment of the principal of (or 
premium, if any) or interest on any Note and remaining unclaimed for two 
years after such principal, premium or interest has become due and payable 
shall be paid to the Company on Company Request, or (if then held by the 
Company) shall be discharged from such trust; and the Holder of such Note 
shall thereafter, as an unsecured general creditor, look only to the Company 
for payment thereof, and all liability of the Trustee or such Paying Agent 
with respect to such trust money, and all liability of the Company as 
trustee thereof, shall thereupon cease.

        SECTION 1004.  Corporate Existence.
                       -------------------

        Subject to Article Eight, the Company will do or cause to be 
done all things necessary to preserve and keep in full force and effect the 
corporate existence, rights (charter and statutory) and franchises of the 
Company and each Restricted Subsidiary of the Company; provided, however, 
                                                       --------  -------
that the Company shall not be required to preserve any such right or 
franchise if the Board of Directors shall determine that the preservation 
thereof is no longer desirable in the conduct of the business of the Company 
and its Restricted Subsidiaries as a whole and that the loss thereof would 
not materially adversely affect the Company's ability to perform its 
obligations under this Indenture and the Notes; provided further, however, 
                                                -------- -------  -------
that the foregoing shall not prohibit a liquidation, dissolution, merger, 
consolidation, sale, transfer, conveyance or other disposition of a 
Restricted Subsidiary of the Company or any of its assets or Capital Stock 
in compliance with the other terms of this Indenture.

        SECTION 1005.  Payment of Taxes and Other Claims.
                       ---------------------------------

        The Company will pay or discharge or cause to be paid or 
discharged, before the same shall become delinquent, (a) all taxes, 
assessments and governmental charges levied or imposed upon the Company or 
any of its Restricted Subsidiaries or upon the income, profits or property 
of the Company or any of its Restricted Subsidiaries and (b) all lawful 
claims for labor, materials and supplies that, if unpaid, might by law 
become a lien upon the property of the Company or any of its Restricted 
Subsidiaries (other than any Permitted Lien or other Lien permitted by this 
Indenture); provided, however, that the Company shall not be required to pay 
            --------  -------
or discharge or cause to be paid or discharged any such tax, assessment, 
charge or claim whose amount, applicability or validity is being contested 
in good faith by appropriate proceedings or where the failure to effect such 
payment or discharge would not materially adversely affect the Company's 
ability to perform its obligations under the Indenture and the Notes.

        SECTION 1006.  Maintenance of Properties.
                       -------------------------

        The Company will cause all material properties owned by the 
Company or any of its Restricted Subsidiaries or used or held for use in the 
conduct of its business or the business of any of its Restricted 
Subsidiaries to be maintained and kept in good condition, repair and working 
order (reasonable wear and tear excepted) and supplied with all reasonably 
necessary equipment and will cause to be made all reasonably necessary 
repairs, renewals, replacements, betterments and improvements thereof, all 
as in the judgment of the Company reasonably may be necessary so that the 
business carried on in connection therewith may be conducted at all times in 
the ordinary course; provided, however, that nothing in this Section shall 
                     --------  -------
prevent the Company from discontinuing the maintenance of any of such 
properties if such discontinuance is, in the judgment of the Company, 
desirable in the conduct of its business or the business of any of its 
Restricted Subsidiaries or if such discontinuance or disposal is not 
materially adverse to the ability of the Company to satisfy its obligations 
hereunder.

        SECTION 1007.  Insurance.
                       ---------

        The Company will at all times keep all of its and its Restricted 
Subsidiaries' properties that are of an insurable nature insured with 
insurers, believed by the Company to be responsible, against loss or damage 
to the extent that property of similar character is usually so insured by 
corporations similarly situated and owning like properties (which may 
include self-insurance, if reasonable and in comparable form to that 
maintained by companies similarly situated).

        SECTION 1008.  Statement by Officers as to Default.
                       -----------------------------------

        (a)  The Company will deliver to the Trustee, within 120 days 
after the end of each fiscal year, a brief certificate from the principal 
executive officer, principal financial officer or principal accounting 
officer as to his or her knowledge of the Company's compliance with all 
conditions and covenants under this Indenture.  For purposes of this Section 
1008(a), such compliance shall be determined without regard to any period of 
grace or requirement of notice under this Indenture.

        (b)  When any Default has occurred and is continuing under this 
Indenture, or if the trustee for or the holder of any other evidence of Debt 
of the Company or any Subsidiary gives any notice or takes any other action 
with respect to a claimed default (other than with respect to Debt in the 
principal amount of less than $15,000,000), the Company shall deliver to the 
Trustee by registered or certified mail or by telegram, telex or facsimile 
transmission an Officers' Certificate specifying such event, notice or other 
action within five Business Days of its occurrence.

        SECTION 1009.  Purchase of Notes upon Change of Control.
                       ----------------------------------------

        (a)  Upon the occurrence of a Change of Control, each Holder will 
have the right to require the Company repurchase such Holder's Outstanding 
Notes (the "Change of Control Offer") in whole or in part in integral 
multiples of $1,000, at a purchase price (the "Purchase Price") in cash in 
an amount equal to 101% of the Accreted Value of such Notes as of any Change 
of Control Payment Date (as defined below), occuring prior to March 1, 2003 
plus any accrued and unpaid cash interest not otherwise included in the 
Accreted Value to such Change of Control Payment Date, or 101% of the 
principal amount on any Change of Control Payment Date occuring on or after 
March 1, 2003, plus accrued and unpaid interest, if any, to such Change of 
Control Payment Date, in accordance with the procedures set forth in 
paragraphs (b) and (c) of this Section  1009; provided, however, that 
                                              --------  -------
notwithstanding the occurrence of a Change of Control, the Company shall not 
be obligated to purchase the Notes pursuant to this Section 1009 in the 
event that it has exercised its right to redeem all the Notes under Article 
Eleven.

        (b)  Unless the Company has exercised its right to redeem all of 
the Notes under Article Eleven, within 30 days following any Change of 
Control, the Company shall give to each Holder of the Notes in the manner 
provided in Section 106 a notice stating:

        (1)  that a Change of Control has occurred and a Change of Control 
   Offer is being made as described in this Section 1009, and that, 
   although Holders are not required to tender their Notes, all Notes 
   that are tendered in accordance with paragraph (c) of this Section 
   1009 shall be accepted for payment;

        (2)  the circumstances and relevant facts regarding such Change of 
   Control (including but not limited to information with respect to pro 
   forma historical income, cash flow and capitalization after giving 
   effect to such Change of Control);

        (3)  the Purchase Price and the date of purchase, which shall be 
   no earlier than 30 days nor later than 60 days from the date such 
   notice is mailed (the "Change of Control Payment Date"); 

        (4)  the instructions and any other information necessary to 
   enable Holders to tender their Notes and have such Notes repurchased 
   in accordance with paragraph (d) of this Section; and

        (5)  that, unless the Company defaults in the payment of the 
   Purchase Price for the Notes payable pursuant to such Change of 
   Control Offer, any Notes accepted for payment pursuant to such Change 
   of Control Offer shall cease to accrete or accrue interest after the 
   Change of Control Payment Date.

        (c)  Holders electing to have Notes purchased will be required to 
   surrender such Notes to the Company at the address specified in the notice 
   at least five Business Days prior to the Change of Control Payment Date.  
   Holders will be entitled to withdraw their election if the Company receives, 
   not later than three Business Days prior to the Change of Control Payment 
   Date, a telegram, telex, facsimile transmission or letter setting forth the 
   name of the Holder, the principal amount at Stated Maturity of the Notes 
   delivered for purchase by the Holder as to which his election is to be 
   withdrawn and a statement that such Holder is withdrawing his election to 
   have such Notes purchased.  Holders whose Notes are purchased only in part 
   will be issued new Notes equal in principal amount at Stated Maturity to the 
   unpurchased portion of the Notes surrendered.

        In the event that a Change of Control occurs and the Company is 
required to purchase Notes as described above, the Company will comply with 
the applicable tender offer rules, including the requirements of Section 
14(e) and Rule 14e-1 under the Exchange Act and any other securities laws 
and regulations to the extent such laws and regulations are applicable, and 
will be deemed not to be in violation of any of its covenants under this 
Indenture to the extent such compliance is in conflict with such covenants.

        On and after a Change of Control Payment Date, the Notes or 
portions thereof accepted for payment shall cease to accrete or accrue 
interest unless the Company defaults in the payment of the purchase price 
therefor.

        (d)  Notwithstanding paragraphs (a) and (b), the Company shall not 
be required to make a Change of Control Offer upon a Change of Control if a 
third party makes the Change of Control Offer in the manner, at the times 
and otherwise in compliance with the requirements set forth in this Section 
1009 applicable to a Change of Control Offer made by the Company and, in 
accordance with paragraph (c) of this Section 1009, purchases all Notes 
validly tendered under the Change of Control Offer and not withdrawn.

        SECTION 1010.  Limitation on Debt.
                       ------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, directly or indirectly, incur any Debt 
(including Acquired Debt) unless (i) after giving effect to such incurrence 
of Debt and the contemporaneous application of the proceeds thereof, no 
Default or Event of Default shall have occurred and be continuing at the 
time or would occur as a consequence of the incurrence of such Debt, and 
(ii) such Debt is Permitted Debt.

        SECTION 1011.  Limitation on Liens.
                       -------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, directly or indirectly, create, incur, assume or 
suffer to exist any Lien of any kind (other than Permitted Liens) on or with 
respect to any of its property or assets, including any shares of stock or 
Debt of any Restricted Subsidiary of the Company, whether owned at the Issue 
Date or thereafter acquired, or any income, profits or proceeds therefrom, 
or assign or otherwise convey any right to receive income thereon, where 
such Lien, assignment or conveyance secures Debt, unless (x) in the case of 
any Lien securing Subordinated Debt, the Notes are secured by a Lien on such 
property, assets or income, profits or proceeds that is senior in priority 
to such Lien and (y) in the case of any other Lien, the Notes are equally 
and ratably secured with the obligation or liability secured by such Lien. 
Any such Lien thereby created in favor of the Notes shall be automatically 
and unconditionally released and discharged upon (i) the release and 
discharge of the Lien or Liens to which it relates, or (ii) any sale, 
exchange or transfer to any Person not an Affiliate of the Company of the 
property or assets secured by such Lien or Liens, or of all of the Capital 
Stock held by the Company or any of its Restricted Subsidiaries in, or all 
or substantially all the assets of, any Restricted Subsidiary creating such 
Lien or Liens.

        SECTION 1012.  Limitation on Restricted Payments.
                       ---------------------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, directly or indirectly, make any Restricted 
Payment unless, at the time of and after giving effect to the proposed 
Restricted Payment, (i) no Default or Event of Default shall have occurred 
and be continuing or shall occur as a consequence thereof; (ii) after giving 
effect, on a pro forma basis, to such Restricted Payment and the incurrence 
of any Debt the net proceeds of which are used to finance such Restricted 
Payment, the Company could incur at least $1.00 of additional Debt pursuant 
to clause (o) of the definition of Permitted Debt; and (iii) after giving 
effect to such Restricted Payment on a pro forma basis, the aggregate amount 
expended or declared for all Restricted Payments on or after the Issue Date 
does not exceed the sum of (A) cumulative EBITDA of the Company and its 
Restricted Subsidiaries (or, if the cumulative EBITDA is negative, minus 
100% of such negative amount) less 1.5 times cumulative Consolidated 
Interest Expense of the Company and its Restricted Subsidiaries, in each 
case for the period (treated as one accounting period) beginning on the 
first day of the Company's fiscal quarter after which the Issue Date occurs, 
and ending on the last day of the Company's fiscal quarter for which 
financial statements are available immediately preceding such proposed 
Restricted Payment, (B) the aggregate Net Cash Proceeds received by the 
Company subsequent to the Issue Date either (x) as capital contributions to 
the Company in the form of or with respect to Common Stock of the Company or 
(y) from the issuance or sale (other than to a Restricted Subsidiary of the 
Company) of Qualified Capital Stock of the Company (including Qualified 
Capital Stock issued upon conversion of convertible Debt or convertible 
Redeemable Capital Stock) or Subordinated Stockholder Debt or any options, 
warrants or rights to purchase such Qualified Capital Stock of the Company, 
less 50% of Debt incurred pursuant to clause (l) of the definition of 
Permitted Debt, and (C) in the case of the disposition or repayment of any 
Investment constituting a Restricted Payment made after the Issue Date 
(including by redesignation of an Unrestricted Subsidiary of the Company to 
a Restricted Subsidiary of the Company), an amount equal to the lesser of 
the return of capital with respect to such Investment and the initial amount 
of such Investment, in either case, less the cost of the disposition of such 
Investment.

        The foregoing limitations do not prevent (i) the payment of a 
dividend or similar distribution on the Capital Stock of the Company or any 
of its Restricted Subsidiaries at any time within 60 days after the 
declaration thereof if, on the declaration date, the Company could have paid 
such dividend in compliance with this Indenture; (ii) the making of 
Permitted Investments by the Company or any of its Restricted Subsidiaries; 
(iii) the redemption, repurchase, retirement or other acquisition of any 
Capital Stock or Subordinated Debt of the Company in exchange for (including 
any such exchange pursuant to the exercise of a conversion right or 
privilege in which cash is paid in lieu of fractional shares or scrip), or 
out of the Net Cash Proceeds of the substantially concurrent sale (other 
than to a Restricted Subsidiary of the Company) of, Qualified Capital Stock 
of the Company; (iv) the purchase, redemption, defeasance or other 
acquisition or retirement for value of Subordinated Debt of the Company in 
exchange for (including any such exchange pursuant to the exercise of a 
conversion right or privilege in which cash is paid in lieu of fractional 
shares or scrip), or out of the Net Cash Proceeds of a substantially 
concurrent incurrence (other than to a Restricted Subsidiary of the Company) 
of, new Subordinated Debt of the Company so long as (A) the principal amount 
of such new Subordinated Debt does not exceed the principal amount (or, if 
such Subordinated Debt being refinanced provides for an amount less than the 
principal amount thereof to be due and payable upon a declaration of 
acceleration thereof, such lesser amount as of the date of determination) of 
the Subordinated Debt being so purchased, redeemed, defeased, acquired or 
retired, plus the lesser of the amount of any premium required to be paid in 
connection with such refinancing pursuant to the terms of the Subordinated 
Debt being refinanced or the amount of any premium reasonably determined by 
the Company as necessary to accomplish such refinancing, plus, in either 
case, the amount of expenses of the Company incurred in connection with such 
refinancing, (B) such new Subordinated Debt is subordinated to the Notes to 
the same extent as such Subordinated Debt so purchased, redeemed, defeased, 
acquired or retired, and (C) such new Subordinated Debt has an Average Life 
longer than the Average Life of the Subordinated Debt being refinanced and a 
final Stated Maturity of principal later than the final Stated Maturity of 
principal of the Subordinated Debt being refinanced; (v) any purchase or 
defeasance of Subordinated Debt to the extent required upon a change of 
control or asset sale (as defined therein) by the indenture or other 
agreement or instrument pursuant to which such Subordinated Debt was issued, 
but only if the Company (x) in the case of a Change of Control, has complied 
with its obligations under Section 1009 or (y) in the case of an Asset Sale, 
has applied the Net Cash Proceeds from such Asset Sale in accordance with 
Section 1016; (vi) the repurchase of Capital Stock of the Company (including 
options, warrants or other rights to acquire such Capital Stock) from 
departing or deceased directors, officers or employees of the Company or its 
Subsidiaries in an aggregate amount not to exceed $1.0 million in any fiscal 
year, provided that the Company may carry forward the unused portion of the 
      --------
$1.0 million in any fiscal year to the next fiscal year, and provided further 
                                                             -------- -------
that the Company may not carry forward more than $2.0 million to any 
subsequent fiscal year; and (vii) the purchase, redemption, acquisition, 
cancellation or other retirement for value of shares of Capital Stock of the 
Company to the extent necessary, in the judgment of the Board of Directors 
of the Company, to prevent the loss or secure the removal or reinstatement 
of any license held by the Company or any Restricted Subsidiary from any 
governmental agency as a result of laws limiting foreign ownership of the 
Company's Capital Stock.

        Restricted Payments made pursuant to clauses (i), (iii), (vi) 
and (vii) of the immediately preceding paragraph shall reduce the amount 
that would otherwise be available for Restricted Payments under clause (iii) 
of the second preceding paragraph and Restricted Payments made pursuant to 
clauses (ii), (iv) and (v) of the immediately preceding paragraph shall not 
reduce the amount that would otherwise be available for Restricted Payments 
under clause (iii) of the second preceding paragraph, provided that any 
                                                      --------
Permitted Investments made pursuant to clause (a) of the definition of 
Permitted Investments shall be deemed to be Restricted Payments for the 
purposes of clause (iii) of the second preceding paragraph.

        For purposes of this Section 1012, if a particular Restricted 
Payment involves a non-cash payment, including a distribution of assets, 
then such Restricted Payment shall be deemed to be an amount equal to the 
cash portion of such Restricted Payment, if any, plus an amount equal to the 
Fair Market Value of the non-cash portion of such Restricted Payment as 
determined by the Board of Directors of the Company, whose good faith 
determination shall be conclusive and evidenced by a Board Resolution.

        SECTION 1013.  Limitation on Dividend and Other Payment 
                       ----------------------------------------
                       Restrictions Affecting Restricted Subsidiaries.
                       ----------------------------------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, directly or indirectly, cause or suffer to exist 
or become effective or enter into any consensual encumbrance or restriction 
on the ability of any Restricted Subsidiary of the Company (i) to pay 
dividends or make any other distributions in respect of its Capital Stock or 
pay any Debt or other obligation owed to the Company or any other Restricted 
Subsidiary of the Company; (ii) to make loans or advances to the Company or 
any Restricted Subsidiary of the Company; or (iii) to transfer any of its 
property or assets to the Company or any other Restricted Subsidiary of the 
Company, except:

        (a)  any encumbrance or restriction pursuant to an agreement in 
   effect at the Issue Date or any amendment, restatement, renewal or 
   replacement of such agreement, so long as the encumbrances and 
   restrictions are not materially more restrictive than those in the 
   agreement in effect on the Issue Date;

        (b)  any encumbrance or restriction pursuant to an agreement 
   relating to an acquisition of property, so long as the encumbrances or 
   restrictions in any such agreement relate solely to the property so 
   acquired (and are not or were not created in anticipation of or in 
   connection with the acquisition thereof);

        (c)  any encumbrance or restriction relating to any Debt of any 
   Restricted Subsidiary of the Company at the date on which such 
   Restricted Subsidiary was acquired by the Company or any Restricted 
   Subsidiary of the Company (other than Debt incurred by such Restricted 
   Subsidiary in connection with or in anticipation of its acquisition);

        (d)  any encumbrance or restriction pursuant to an agreement 
   effecting a permitted refinancing of Debt issued pursuant to an 
   agreement referred to in the foregoing clauses (a) through (c), or 
   permitted replacement or increase of Debt referred to in the foregoing 
   clause (a) so long as the encumbrances and restrictions contained in 
   any such refinancing agreement are not materially more restrictive 
   than the encumbrances and restrictions contained in the agreements 
   governing the Debt being so refinanced;

        (e)  customary provisions restricting subletting or assignment of 
   any lease, license or similar contract of the Company or any 
   Restricted Subsidiary of the Company or provisions in agreements that 
   restrict the assignment of such agreement or any rights thereunder;

        (f)  any encumbrance or restriction arising out of any sale of 
   accounts receivable in the ordinary course (including in connection 
   with a financing transaction) to or by (i) an Accounts Receivable 
   Subsidiary or (ii) to Persons that are not Affiliates of the Company 
   or any Subsidiary of the Company;

        (g)  any encumbrance or restriction on the sale or other 
   disposition of assets or property securing Debt as a result of a 
   Permitted Lien on such assets or property (including, without 
   limitation, customary restrictions relating to assets securing the 
   Credit Agreement, any Vendor Debt or any Telecommunications Assets 
   Debt under the applicable security documents); and

        (h)  any encumbrance or restriction contained in contracts for 
   sales of assets permitted by Section 1016 with respect to the assets 
   to be sold pursuant to such contract.

        Nothing contained in this Section 1013 shall prevent the Company 
or any of its Restricted Subsidiaries from (1) creating, incurring, assuming 
or suffering to exist any Liens otherwise permitted in Section 1011 or (2) 
restrictions on the sale or other disposition of property or assets of the 
Company or any of its Restricted Subsidiaries to the extent that such 
property or assets secure Debt of the Company or any of its Restricted 
Subsidiaries not incurred or secured in violation of this Indenture.


        SECTION 1014.  Limitation on Issuances of Certain Guarantees by, 
                       ------------------------------------------------
                       and Debt Securities of, Restricted Subsidiaries.
                       -----------------------------------------------

        The Company shall not permit any of its Restricted Subsidiaries 

to (i) directly or indirectly Guarantee any Debt Securities of the Company, 
or (ii) issue any Debt Securities, unless, in either such case, such 
Restricted Subsidiary (such Restricted Subsidiary, a "Subsidiary Guarantor") 
simultaneously executes and delivers a Guarantee (a "Subsidiary Guarantee") 
of the Notes.  Any such Subsidiary Guarantee shall not be subordinate in 
right of payment to any Debt of the Restricted Subsidiary providing the 
Subsidiary Guarantee.  A Restricted Subsidiary shall be deemed released from 
all of its obligations under its Subsidiary Guarantee at any such time that 
such Restricted Subsidiary is released from all of its obligations under all 
of its Guarantees in respect of Debt Securities of the Company or its 
obligations under its Debt Securities, as applicable.  The obligations of 
each Restricted Subsidiary under a Subsidiary Guarantee shall be limited to 
the maximum amount, as shall, after giving effect to all other contingent 
and fixed liabilities of such Restricted Subsidiary, result in the 
obligations of such Restricted Subsidiary under the Subsidiary Guarantee not 
constituting a fraudulent conveyance or fraudulent transfer under applicable 
law.  Notwithstanding the foregoing, any Subsidiary Guarantee by a 
Restricted Subsidiary of the Notes shall provide by its terms that it shall 
be automatically and unconditionally released and discharged upon the sale 
or other disposition, by way of merger or otherwise, to any Person not an 
Affiliate of the Company, of all of the Company's and its Restricted 
Subsidiaries' Capital Stock in such Restricted Subsidiary.  In addition, any 
Subsidiary Guarantee shall be automatically and unconditionally released and 
discharged upon the merger or consolidation of the applicable Restricted 
Subsidiary with and into the Company or another Restricted Subsidiary that 
has guaranteed the Notes and that is the surviving Person in such merger or 
consolidation.

        SECTION 1015.  Limitation on Issuances and Sales of Capital 
                       --------------------------------------------
                       Stock in Restricted Subsidiaries.
                       --------------------------------

        The Company (a) shall not permit any of its Restricted 
Subsidiaries to issue any Capital Stock (other than to the Company or a 
Restricted Subsidiary of the Company) unless the Company acquires at the 
same time not less than its Proportionate Interest in such issuance of 
Capital Stock and (b) shall not permit any Person (other than the Company or 
a Restricted Subsidiary of the Company) to own any Capital Stock in any 
Restricted Subsidiary of the Company; provided, however, that this Section 
                                      --------  -------
1015 shall not prohibit (i) the sale or other disposition of all, but not 
less than all, of the issued and outstanding Capital Stock in any Restricted 
Subsidiary owned by the Company or any Restricted Subsidiary of the Company 
in compliance with the other provisions of this Indenture, (ii) the 
ownership of Capital Stock issued as permitted by clause (a) above, (iii) 
the ownership by directors of directors' qualifying shares or the ownership 
by foreign nationals of Capital Stock in any Restricted Subsidiary of the 
Company, to the extent mandated by applicable law, (iv) the ownership of 
Capital Stock of a Restricted Subsidiary issued and outstanding prior to the 
time that such Person becomes a Restricted Subsidiary of the Company so long 
as such Capital Stock was not issued in contemplation of such Person's 
becoming a Restricted Subsidiary of the Company or otherwise being acquired 
by the Company, (v) the issuance or sale of Capital Stock of a Restricted 
Subsidiary of the Company in a transaction that complies with Section 1016, 
provided that such Restricted Subsidiary would remain a Restricted 
- --------
Subsidiary after such transaction, or, if not a Restricted Subsidiary of the 
Company after such transaction, the remaining Capital Stock held by the 
Company must be treated as an Investment made at that time and must comply 
with Section 1012 or constitute a Permitted Investment, and (vi) the 
ownership of Qualified Capital Stock of a Restricted Subsidiary issued in 
exchange for, or the proceeds of which are used to refinance, Capital Stock 
of a Restricted Subsidiary owned by a Person other than the Company or a 
Restricted Subsidiary as permitted by clause (iv), provided that (x) the 
                                                   --------
liquidation value of such Qualified Capital Stock so issued that is 
preferred stock shall not exceed the liquidation value of the Capital Stock 
so exchanged or refinanced and (y) the Qualified Capital Stock so issued 
that is preferred stock (I) shall not have a Stated Maturity earlier than 
the Stated Maturity of the Capital Stock being exchanged or refinanced and 
(II) shall not have an Average Life less than the remaining Average Life of 
the Capital Stock being exchanged or refinanced. Notwithstanding the 
foregoing, each Restricted Subsidiary of the Company that owns or holds a 
Federal Communications Commission license for the transmission of wireless 
telecommunications services shall at all times remain a wholly owned 
Restricted Subsidiary of the Company and shall not, directly or indirectly, 
sell, convey, transfer, lease or otherwise dispose of any assets or property 
used or useful in the operation of the business of the Company or any of its 
Restricted Subsidiaries, other than (i) to the Company or another wholly 
owned Restricted Subsidiary of the Company or (ii) in a transaction that 
complies with Section 1016.

        SECTION 1016.  Limitation on Asset Sales.
                       -------------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, consummate an Asset Sale unless (i) the Company 
or such Restricted Subsidiary, as the case may be, receives consideration 
(including by way of relief from, or by any Person other than the Company or 
any of its Restricted Subsidiaries assuming responsibility for, any 
liabilities, contingent or otherwise) at the time of such Asset Sale at 
least equal to the Fair Market Value (as evidenced by a Board Resolution, 
which determination shall be conclusive (including as to the value of all 
non-cash consideration)) of the property or assets sold or otherwise 
disposed of, (ii) at least 75% of the consideration received by the Company 
or such Restricted Subsidiary for such property or assets consists of cash 
or Eligible Cash Equivalents and (iii) the Company or such Restricted 
Subsidiary of the Company, as the case may be, uses the Net Cash Proceeds in 
the manner set forth in the next paragraph; provided, however, that for 
                                            --------  -------
purposes of this Section 1016, "cash" shall include (i) the amount of any 
liabilities (other than liabilities that are by their terms subordinated to 
the Notes) of the Company or such Restricted Subsidiary (as shown on the 
Company's or such Restricted Subsidiary's most recent balance sheet or in 
the notes thereto) that are assumed by the transferee of any such assets or 
other property in such Asset Sale or are no longer the liability of the 
Company or any Restricted Subsidiary (and excluding any liabilities that are 
incurred in connection with or in anticipation of such Asset Sale), but only 
to the extent that such assumption is effected on a basis under which there 
is no further recourse to the Company or any of its Restricted Subsidiaries 
with respect to such liabilities, and (ii) any securities, notes or other 
obligations received by the Company or any such Restricted Subsidiary in 
connection with such Asset Sale that are converted by the Company or such 
Restricted Subsidiary into cash within 60 days of receipt.

        Within 360 days after any Asset Sale, the Company or such 
Restricted Subsidiary of the Company, as the case may be, may at its option 
(a) reinvest an amount equal to the Net Cash Proceeds (or any portion 
thereof) from such disposition in Replacement Assets, provided that if such 
                                                      --------
Investment is in a project authorized by the Board of Directors of the 
Company that shall take longer than such 360 day period to complete, the 
Company shall be entitled to utilize 90 additional days to apply such Net 
Cash Proceeds, and/or (b) apply an amount equal to such Net Cash Proceeds 
(or remaining Net Cash Proceeds) to the permanent reduction of any Debt of 
the Company ranking pari passu with the Notes (including the Notes) or Debt 
of any Restricted Subsidiary of the Company. Any Net Cash Proceeds from any 
Asset Sale that are not used to reinvest in Replacement Assets and/or repay 
any such pari passu Debt of the Company or Debt of its Restricted 
Subsidiaries constitute Excess Proceeds.

        When the aggregate amount of Excess Proceeds exceeds $10.0 
million Date", the Company shall, as soon as practicable, but in any event 
within 20 Business Days, make an offer to the extent of the Excess Proceeds 
to purchase (an "Asset Sale Offer"), on a pro rata basis, the Notes and the 
other Debt described in the next sentence, at a price in cash for the Notes 
equal to 100% of the Accreted Value thereof on any Asset Sale Purchase Date 
occurring prior to March 1, 2003, plus any accrued and unpaid cash interest 
not otherwise included in Accreted Value to such Asset Sale Purchase Date, 
or 100% of the principal amount thereof at Stated Maturity on any Asset Sale 
Purchase Date occurring on or after March 1, 2003, plus accrued and unpaid 
interest, if any, to such Asset Sale Purchase Date, in accordance with the 
procedures set forth in this Indenture.  Any Asset Sale Offer shall include 
a pro rata offer under similar circumstances to purchase all other unsecured 
Debt of the Company ranking pari passu with the Notes, which Debt contains 
similar provisions requiring the Company to purchase such Debt. To the 
extent that any amount of Excess Proceeds remains after completion of such 
offer to purchase, the Company or such Restricted Subsidiary of the Company 
may use such remaining amount for general corporate purposes and the amount 
of Excess Proceeds shall be reset to zero.


        Notwithstanding the three immediately preceding paragraphs, the 
Company and its Restricted Subsidiaries shall be permitted to consummate an 
Asset Sale without complying with such paragraphs to the extent that (i) at 
least 75% of the consideration for such Asset Sale consists of 
Telecommunications Assets and (ii) such Asset Sale is for Fair Market Value; 
provided that any such acquisition of Telecommunications Assets that is an 
- --------
Investment is made in compliance with Section 1012 or constitutes a 
Permitted Investment, other than pursuant to clause (h) of the definition 
thereof, and any Net Cash Proceeds received by the Company or any of its 
Restricted Subsidiaries in connection with any such Asset Sale shall be 
subject to the provisions of the three immediately preceding paragraphs.

        Notice of an Asset Sale Offer shall be prepared and mailed by 
the Company with a copy to the Trustee not later than the 20th Business Day 
after the related Asset Sale Offer Trigger Date to each Holder at such 
Holder's registered address, stating: 

        (1)  that an Asset Sale Offer Trigger Date has occurred and that the 
        Company is offering to purchase the maximum principal amount of Notes 
        that may be purchased out of the Excess Proceeds to the extent to be 
        applied to an offer to purchase Notes (as provided in the second 
        preceding paragraph), at an offer price in cash in an amount equal to 
        (i) 100% of the Accreted Value thereof on any Asset Sale Offer 
        Purchase Date occurring prior to March 1, 2003 or (ii) 100% of the 
        principal amount thereof at Stated Maturity on any Asset Sale Offer 
        Purchase Date occurring on or after March 1, 2003, plus accrued and 
        unpaid interest, if any, to the date of the purchase (the "Asset Sale 
        Offer Purchase Date"), which shall be a Business Day, specified in 
        such notice, that is not earlier than 30 days or later than 60 days 
        from the date such notice is mailed;

        (2)  the amount of accrued and unpaid interest, if any, as of the Asset 
        Sale Offer Purchase Date;

        (3)  that any Note not tendered will continue to accrue interest in 
        accordance with the terms thereof;

        (4)  that, unless the Company defaults in the payment of the purchase 
        price for the Notes payable pursuant to the Asset Sale Offer, any 
        Notes accepted for payment pursuant to the Asset Sale Offer shall 
        cease to accrete or accrue interest after the Asset Sale Offer 
        Purchase Date;

        (5)  that Holders electing to have Notes purchased pursuant to an Asset 
        Sale Offer will be required to surrender their Notes to the Paying 
        Agent at the address specified in the notice prior to 5:00 p.m., New 
        York City time, on the third Business Day prior to the Asset Sale 
        Offer Purchase Date and must complete any form letter of transmittal 
        proposed by the Company (which letter must be completed correctly by 
        such Holder) and reasonably acceptable to the Trustee and the Paying 
        Agent;

        (6)  that Holders will be entitled to withdraw their election if the 
        Paying Agent receives, not later than 5:00 p.m., New York City time, 
        on the third Business Day prior to the Asset Sale Offer Purchase Date, 
        a telegram, telex, facsimile transmission or letter setting forth the 
        name of the Holder, the principal amount of Notes the Holder delivered 
        for purchase, the Note certificate number (if any) and a statement 
        that such Holder is withdrawing its election to have such Notes 
        purchased;

        (7)  that Holders whose Notes are purchased only in part will be issued 
        Notes equal in principal amount at Stated Maturity to the unpurchased 
        portion of the Notes surrendered; and

        (8)  the instructions that Holders must follow in order to tender their 
        Notes.

        Prior to 10:00 a.m., New York City time, on the Asset Sale Offer 
Purchase Date, the Company will (i) accept for payment the maximum principal 
amount of Notes or portions thereof tendered pursuant to the Asset Sale 
Offer that can be purchased out of Excess Proceeds from such Asset Sale that 
are to be applied to an Asset Sale Offer (to the extent provided in the 
second preceding paragraph), (ii) deposit with the Trustee or a Paying Agent 
(or, if the Company is acting as its own Paying Agent, segregate and hold in 
trust as provided in Section 1003) an amount in cash equal to the aggregate 
purchase price of all Notes or portions thereof accepted for payment and any 
accrued and unpaid interest on such Notes as of the Asset Sale Offer 
Purchase Date, and (iii) deliver or cause to be delivered to the Trustee all 
Notes tendered pursuant to the Asset Sale Offer.  

        If less than all Notes tendered pursuant to the Asset Sale Offer 
are accepted for payment by the Company for any reason consistent with this 
Indenture, selection of the Notes to be purchased by the Company shall be in 
compliance with the requirements of the principal national securities 
exchange, if any, on which the Notes are listed or, if the Notes are not so 
listed, on a pro rata basis or by lot or any other method as the Trustee 
shall deem fair and appropriate and that may provide for the selection for 
purchase of portions of the principal of Notes; provided, however, that 
                                                --------  -------
Notes accepted for payment in part shall be purchased only in integral 
multiples of $1,000 of principal amount at Stated Maturity.  The Paying 
Agent shall as promptly as practicable after the Asset Sale Offer Purchase 
Date mail to each Holder of Notes or portions thereof accepted for payment 
an amount in cash equal to the purchase price for such Notes plus any 
accrued and unpaid interest thereon, and the Trustee shall authenticate 
promptly and mail to such Holder of Notes accepted for payment in part a new 
Note equal in principal amount to any unpurchased portion of the Notes, and 
any Note not accepted for payment in whole or in part shall be returned 
promptly to the Holder of such Note. 

        On and after an Asset Sale Offer Purchase Date, the Notes or 
portions thereof accepted for payment will cease to accrete or accrue 
interest, unless the Company defaults in the payment of the purchase price 
therefor.  The Company will announce the results of the Asset Sale Offer on 
or as soon as practicable after the Asset Sale Offer Purchase Date.

        The Company shall comply with the applicable tender offer rules, 
(including, without limitation, any applicable requirements of Rule 14e-1 
under the Exchange Act), and all other applicable securities laws and 
regulations in connection with any Asset Sale Offer and will be deemed not 
to be in violation of any of its covenants under this Indenture to the 
extent such compliance is in conflict with such covenants.

        SECTION 1017.  Transactions with Affiliates.
                       ----------------------------

        The Company shall not, and shall not permit any of its 
Restricted Subsidiaries to, directly or indirectly, enter into or permit to 
exist any transaction or series of related transactions (including, but not 
limited to, the purchase, sale or exchange of property, the making of any 
Investment, the giving of any Guarantee or the rendering of any service) 
with any Affiliate of the Company or such Restricted Subsidiary, as the case 
may be, unless (i) such transaction or series of related transactions is on 
terms that taken as a whole are no less favorable to the Company or such 
Restricted Subsidiary than those that could be obtained in a comparable 
arm's-length transaction with a Person that is not such an Affiliate and 
(ii) (a) with respect to a transaction or series of related transactions 
that involves aggregate payments equal to, or in excess of, $5.0 million but 
less than $10.0 million, the Company delivers to the Trustee an Officers' 
Certificate stating that such transaction or series of related transactions 
complies with clause (i) above; and (b) with respect to a transaction or 
series of related transactions that involves aggregate payments equal to, or 
in excess of, $10.0 million, the Company delivers to the Trustee an 
Officers' Certificate stating that such transaction or series of related 
transactions complies with clause (i) above, and either (x) such transaction 
or series of related transactions is approved by a majority of the Board of 
Directors (including a majority of the Disinterested Directors, or in the 
event there is only one Disinterested Director, by such Disinterested 
Director), which approval is set forth in a resolution delivered to the 
Trustee or (y) the Company obtains an opinion from a nationally recognized 
investment banking firm, accounting firm or appraisal firm stating that such 
transaction or series of related transactions complies with clause (i) above 
or is fair to the Company or such Restricted Subsidiary from a financial 
point of view and delivers such opinion to the Trustee.


        Notwithstanding the foregoing, this Section 1017 shall not apply 
to (i) any transaction entered into by or among the Company or one of its 
Restricted Subsidiaries with one or more Restricted Subsidiaries of the 
Company, (ii) any Restricted Payment not prohibited by Section 1012, or any 
Permitted Investment, (iii) the payment of reasonable and customary fees to 
directors of the Company and its Restricted Subsidiaries who are not 
employees of the Company or its Subsidiaries, (iv) loans or advances made to 
directors, officers or employees of the Company or any Restricted 
Subsidiary, or Guarantees in respect thereof or otherwise made on their 
behalf (including any payments under such Guarantees), in respect of travel, 
entertainment or moving-related expenses incurred in the ordinary course of 
business, in an aggregate principal amount not to exceed $500,000 in any 
fiscal year, (v) the granting and performance of registration rights for 
shares of Capital Stock of the Company, (vi) transactions pursuant to the 
Administrative Services Agreement between the Company and Associated, as in 
effect on the Issue Date and as such agreement may be amended from time to 
time in a manner no less favorable to the Holders of the Notes (vii) 
transactions pursuant to the Technical Services Agreement between the 
Company and NTT America, Inc., as in effect on the Issue Date and as such 
agreement may be amended from time to time in a manner no less favorable to 
the Holders of the Notes, or (viii) transactions pursuant to the 
Stockholders' Agreement among the Company, Nippon Telegraph and Telephone 
Corporation and certain other stockholders of the Company, as in effect on 
the Issue Date and as such agreement may be amended from time to time in a 
manner no less favorable to the Holders of the Notes.

        SECTION 1018.  Waiver of Certain Covenants.
                       ---------------------------

        The Company may omit in any particular instance to comply with 
any term, provision or condition set forth in Sections 1005 through 1017, 
inclusive, if before or after the time for such compliance the Holders of at 
least a majority in principal amount at Stated Maturity of the Outstanding 
Notes, by Act of such Holders (including by way of consents obtained with a 
purchase of, or a tender or exchange offer for, Notes), waive such 
compliance in such instance with such term, provision or condition, but no 
such waiver shall extend to or affect such term, provision or condition 
except to the extent so expressly waived, and, until such waiver shall 
become effective, the obligations of the Company and the duties of the 
Trustee in respect of any such term, provision or condition shall remain in 
full force and effect.

        SECTION 1019.  Provision of Financial Information.
                       ----------------------------------

        Whether or not the Company is subject to Section 13(a) or 15(d) 
of the Exchange Act, or any successor provision thereto, the Company shall 
file with the Commission the annual reports, quarterly reports and other 
documents that the Company would have been required to file with the 
Commission pursuant to such Section 13(a) or 15(d) or any successor 
provision thereto if the Company were subject thereto and shall file such 
documents with the Commission on or prior to the respective dates (the 
"Required Filing Dates") by which the Company would have been required to 
file them.  The Company shall also in any event (a) within 15 days of each 
Required Filing Date (i) transmit by mail to all Holders, as their names and 
addresses appear in the Security Register, without cost to such Holders, and 
(ii) file with the Trustee copies of the annual reports, quarterly reports 
and other documents (without exhibits) that the Company would have been 
required to file with the Commission pursuant to Section 13(a) and 15(d) of 
the Exchange Act or any successor provisions thereto if the Company was 
subject thereto and (b) if filing such documents by the Company with the 
Commission is not permitted under the Exchange Act, promptly upon written 
request supply copies of such documents (without exhibits) to any 
prospective Holder.


                             ARTICLE ELEVEN

                           REDEMPTION OF NOTES

        SECTION 1101.  Right of Redemption.
                       -------------------

        The Notes may be redeemed, at the election of the Company, as a 
whole or from time to time in part, at any time after March 1, 2003 subject 
to the conditions and at the Redemption Prices specified in the form of 
Note, together with accrued and unpaid interest to the Redemption Date.  

        SECTION 1102.  Applicability of Article.
                       ------------------------

        Redemption of Notes at the election of the Company or otherwise, 
as permitted or required by any provision of this Indenture, shall be made 
in accordance with such provision and this Article. 

        SECTION 1103.  Election to Redeem; Notice to Trustee.
                       -------------------------------------

        The election of the Company to redeem any Notes pursuant to 
Section 1101 shall be evidenced by a Board Resolution.  In case of any 
redemption at the election of the Company, the Company shall, at least 60 
days prior to the Redemption Date fixed by the Company (unless a shorter 
notice shall be satisfactory to the Trustee), notify the Trustee of such 
Redemption Date and of the principal amount at Stated Maturity of Notes to 
be redeemed and shall deliver to the Trustee such documentation and records 
as shall enable the Trustee to select the Notes to be redeemed pursuant to 
Section 1104.

        SECTION 1104.  Selection by Trustee of Notes to Be Redeemed.
                       --------------------------------------------

        If less than all the Notes are to be redeemed, the particular 
Notes to be redeemed shall be selected not more than 60 days prior to the 
Redemption Date by the Trustee from the Outstanding Notes not previously 
called for redemption in compliance with the requirements of the principal 
national securities exchange, if any, on which the Notes are listed or, if 
the Notes are not then listed on a national securities exchange, on a pro 
rata basis or by lot or any other method as the Trustee shall deem fair and 
appropriate and which may provide for the selection for redemption of 
portions of the principal of Notes; provided, however, that no such partial 
                                    --------  -------
redemption shall reduce the portion of the principal amount at Stated 
Maturity of a Note not redeemed to less than $1,000.

        The Trustee shall promptly notify the Company in writing of the 
Notes selected for redemption and, in the case of any Notes selected for 
partial redemption, the principal amount at Stated Maturity thereof to be 
redeemed.

        For all purposes of this Indenture, unless the context otherwise 
requires, all provisions relating to redemption of Notes shall relate, in 
the case of any Note redeemed or to be redeemed only in part, to the portion 
of the principal amount at Stated Maturity of such Note that has been or is 
to be redeemed.

        SECTION 1105.  Notice of Redemption.
                       --------------------

        Notice of redemption shall be given in the manner provided for 
in Section [106] not less than 30 nor more than 60 days prior to the 
Redemption Date, to each Holder of Notes to be redeemed.

        All notices of redemption shall state:

        (1)  the Redemption Date,

        (2)  the Redemption Price and the amount of accrued interest to 
   the Redemption Date payable as provided in Section 1107, if any,

        (3)  if less than all Outstanding Notes are to be redeemed, the 
   identification (and, in the case of a partial redemption, the 
   principal amounts at Stated Maturity) of the particular Notes to be 
   redeemed,

        (4)  in case any Note is to be redeemed in part only, the notice 
   that relates to such Note shall state that on and after the Redemption 
   Date, upon surrender of such Note, the holder will receive, without 
   charge, a new Note or Notes of authorized denominations for the 
   principal amount at Stated Maturity thereof remaining unredeemed,

        (5)  that on the Redemption Date the Redemption Price (and accrued 
   interest, if any, to the Redemption Date payable as provided in 
   Section 1107) will become due and payable upon each such Note, or the 
   portion thereof, to be redeemed, and that interest thereon will cease 
   to accrue on and after said date, and

        (6)  the place or places where such Notes are to be surrendered 
   for payment of the Redemption Price and accrued interest, if any.  

        Notice of redemption of Notes to be redeemed at the election of 
the Company shall be given by the Company or, at the Company's request, by 
the Trustee in the name and at the expense of the Company.

        SECTION 1106.  Deposit of Redemption Price.
                       ---------------------------

        Prior to 10:00 a.m., New York City time, on any Redemption Date, 
the Company shall deposit with the Trustee or with a Paying Agent (or, if 
the Company is acting as its own Paying Agent, segregate and hold in trust 
as provided in Section 1003) an amount of money sufficient to pay the 
Redemption Price of, and accrued interest on, all the Notes that are to be 
redeemed on that date.

        SECTION 1107.  Notes Payable on Redemption Date.
                       --------------------------------

        Notice of redemption having been given as aforesaid, the Notes 
so to be redeemed shall, on the Redemption Date, become due and payable at 
the Redemption Price therein specified (together with accrued interest, if 
any, to the Redemption Date), and from and after such date (unless the 
Company shall default in the payment of the Redemption Price and accrued 
interest) such Notes shall cease to bear interest.  Upon surrender of any 
such Note for redemption in accordance with said notice, such Note shall be 
paid by the Company at the Redemption Price, together with accrued interest, 
if any, to the Redemption Date; provided, however, that installments of 
                                --------  -------
interest whose Stated Maturity is on or prior to the Redemption Date shall 
be payable to the Holders of such Notes, or one or more Predecessor Notes, 
registered as such at the close of business on the relevant Record Dates 
according to their terms and the provisions of Section 307.

        On and after any Redemption Date, if money sufficient to pay the 
Redemption Price of any accrued and unpaid interest on Notes called for 
redemption shall have been made available in accordance with Section 1106, 
the Notes called for redemption will cease to accrue interest and the only 
right of the Holders of such Notes will be to receive payment of the 
Redemption Price of and, subject to the provision in the preceding 
paragraph, any accrued and unpaid interest on such Notes to the Redemption 
Date.

        If any Note called for redemption shall not be so paid upon 
surrender thereof for redemption, the principal (and premium, if any) shall, 
until paid, bear interest from the Redemption Date at the rate borne by the 
Notes.


        SECTION 1108.  Notes Redeemed in Part.
                       ----------------------

        Any Note that is to be redeemed only in part shall be 
surrendered at the office or agency of the Company maintained for such 
purpose pursuant to Section [1002] (with, if the Company or the Trustee so 
requires, due endorsement by, or a written instrument of transfer in form 
satisfactory to the Company and the Trustee duly executed by, the Holder 
thereof or such Holders attorney duly authorized in writing), and the 
Company shall execute, and the Trustee shall authenticate and deliver to the 
Holder of such Note without service charge, a new Note or Notes, of any 
authorized denomination as requested by such Holder, in aggregate principal 
amount at Stated Maturity equal to and in exchange for the unredeemed 
portion of the principal of the Note so surrendered.


                              ARTICLE TWELVE

                         [Intentionally omitted]


                            ARTICLE THIRTEEN

                  DEFEASANCE AND COVENANT DEFEASANCE

        SECTION 1301.  Company's Option to Effect Defeasance or Covenant 
                       -------------------------------------------------
                       Defeasance.
                       ----------

        The Company may, at its option by Board Resolution, at any time, 
with respect to the Notes, elect to have either Section 1302 or Section 1303 
be applied to all Outstanding Notes and Subsidiary Guarantees upon 
compliance with the conditions set forth below in this Article Thirteen.  
Either Section 1302 or Section 1303 may be applied to the Notes to any 
Redemption Date or the Stated Maturity of the Notes.

        SECTION 1302.  Defeasance and Discharge.
                       ------------------------

        Upon the Company's exercise under Section 1301 of the option 
applicable to this Section 1302, the Company shall be deemed to have been 
discharged from its obligations with respect to all Outstanding Notes, and 
the Subsidiary Guarantors, if any, shall be deemed to have been discharged 
from their respective obligations under their respective Subsidiary 
Guarantees, on the date the conditions set forth in Section 1304 are 
satisfied (hereinafter, "defeasance").  For this purpose, such defeasance 
means that the Company shall be deemed to have paid and discharged the 
entire indebtedness represented by the Outstanding Notes, which thereafter 
shall be deemed to be "Outstanding" only for the purposes of Section 1305 
and the other Sections of this Indenture referred to in (A) and (B) below, 
and the Company and the Subsidiary Guarantors, if any, shall be deemed to 
have satisfied all their other respective obligations under such Notes and 
this Indenture insofar as such Notes are concerned (and the Trustee, at the 
expense of the Company, shall execute proper instruments acknowledging the 
same), except for the following, which shall survive until otherwise 
terminated or discharged hereunder:  (A) the rights of Holders of 
Outstanding Notes to receive, solely from the trust fund described in 
Section 1304 and as more fully set forth in such Section, payments in 
respect of the principal of (and premium, if any, on) and interest on such 
Notes when such payments are due, (B) the Company's obligations with respect 
to such Notes under Sections 304, 305, 306, 1002 and 1003, (C) the rights, 
powers, trusts, duties and immunities of the Trustee hereunder and (D) this 
Article Thirteen; provided, however, that the Company's rights pursuant to 
                  --------  -------
Section 1101 shall not be terminated or discharged hereunder.  Subject to 
compliance with this Article Thirteen, the Company may exercise its option 
under this Section 1302 notwithstanding the prior exercise of its option 
under Section 1303 with respect to the Notes.

        SECTION 1303.  Covenant Defeasance.
                       -------------------

        Upon the Company's exercise under Section 1301 of the option 
applicable to this Section 1303, the Company and the Subsidiary Guarantors, 
if any, shall be released from their respective obligations under any 
covenant contained in Section 801(c) and in Sections 1005 through 1017 with 
respect to the Outstanding Notes on and after the date the conditions set 
forth below are satisfied (hereinafter, "covenant defeasance"), and the 
Notes shall thereafter be deemed not to be "Outstanding" for the purposes of 
any direction, waiver, consent or declaration or Act of Holders (and the 
consequences of any thereof) in connection with such covenants, but shall 
continue to be deemed "Outstanding" for all other purposes hereunder.  For 
this purpose, such covenant defeasance means that, with respect to the 
Outstanding Notes, the Company and the Subsidiary Guarantors, if any, may 
omit to comply with and shall have no liability in respect of any term, 
condition or limitation set forth in any such covenant, whether directly or 
indirectly, by reason of any reference elsewhere herein to any such covenant 
or by reason of any reference in any such covenant to any other provision 
herein or in any other document and such omission to comply shall not 
constitute a Default or an Event of Default under Section 501, but, except 
as specified above, the remainder of this Indenture and such Notes shall be 
unaffected thereby.

        SECTION 1304.  Conditions to Defeasance or Covenant Defeasance.
                       -----------------------------------------------

        The following shall be the conditions to application of either 
Section 1302 or Section 1303 to the Outstanding Notes:

        (1)  the Company shall irrevocably have deposited or caused to be 
   deposited with the Trustee (or another trustee satisfying the 
   requirements of Section [608] who shall agree to comply with the 
   provisions of this Article Thirteen applicable to it) as trust funds 
   in trust for the purpose of making the following payments, 
   specifically pledged as security for, and dedicated solely to, the 
   benefit of the Holders of such Notes, (A) money in an amount, or 
   (B) U.S. Government Obligations that through the scheduled payment of 
   principal and interest in respect thereof in accordance with their 
   terms will provide, not later than one day before the due date of any 
   payment, money in an amount, or (C) a combination thereof, sufficient, 
   in the opinion of a nationally recognized firm of independent public 
   accountants or a nationally recognized investment banking firm 
   expressed in a written certification thereof delivered to the Trustee, 
   to pay and discharge, and which shall be applied by the Trustee (or 
   other qualifying trustee) to pay and discharge, the Accreted Value of, 
   premium, if any, on and interest on the Outstanding Notes to the 
   Stated Maturity (or Redemption Date, if applicable) of such principal 
   (and premium, if any) or installment of interest on the day on which 
   such payments are due and payable in accordance with the terms of this 
   Indenture and of such Notes; provided that the Trustee shall have been 
                                --------
   irrevocably instructed to apply such money or the proceeds of such 
   U.S. Government Obligations to said payments with respect to the 
   Notes.  Before such a deposit, the Company may give to the Trustee, in 
   accordance with Section 1103 hereof, a notice of its election to 
   redeem all of the Outstanding Notes at a future date in accordance 
   with Article Eleven hereof, which notice shall be irrevocable.  Such 
   irrevocable redemption notice, if given, shall be given effect in 
   applying the foregoing.

        (2)  No Default or Event of Default with respect to the Notes 
   shall have occurred and be continuing on the date of such deposit 
   (other than a Default or Event of Default resulting from the 
   incurrence of Debt, the proceeds of which are applied to such deposit) 
   or, insofar as paragraphs (g) and (h) of Section 501 hereof are 
   concerned, at any time during the period ending on the 91st day after 
   the date of such deposit (it being understood that this condition 
   shall not be deemed satisfied until the expiration of such period).

        (3)  Such defeasance or covenant defeasance shall not result in a 
   breach or violation of, or constitute a default under, this Indenture 
   (other than a Default or Event of Default resulting from the 
   incurrence of Debt, the proceeds of which are applied to such deposit) 
   or any other material agreement or instrument to which the Company is 
   a party or by which it is bound.


        (4)  In the case of an election under Section 1302 and in the 
   event that such election shall occur more than twelve months prior to 
   the Stated Maturity of the Outstanding Notes, the Company shall have 
   delivered to the Trustee an Opinion of Counsel stating that (x) the 
   Company has received from, or there has been published by, the 
   Internal Revenue Service a ruling, or (y) since February 20, 1998, 
   there has been a change in the applicable federal income tax law, in 
   either case to the effect that, and based thereon such opinion shall 
   state to the effect that, the Holders of the Outstanding Notes will 
   not recognize income, gain or loss for federal income tax purposes as 
   a result of such defeasance and will be subject to federal income tax 
   on the same amounts, in the same manner and at the same times as would 
   have been the case if such defeasance had not occurred.
  
        (5)  In the case of an election under Section 1303 and in the 
   event that such election shall occur more than twelve months prior to 
   the Stated Maturity of the Outstanding Notes, the Company shall have 
   delivered to the Trustee an Opinion of Counsel to the effect that the 
   Holders of the Outstanding Notes will not recognize income, gain or 
   loss for federal income tax purposes as a result of such covenant 
   defeasance and will be subject to federal income tax on the same 
   amounts, in the same manner and at the same times as would have been 
   the case if such covenant defeasance had not occurred.

        (6)  The Company shall have delivered to the Trustee an Opinion of 
   Counsel to the effect that after the 91st day following the Company's 
   deposit, the trust funds shall not be subject to the effect of any 
   applicable bankruptcy, insolvency, reorganization, or similar laws 
   affecting creditors' rights generally. 

        (7)  The Company shall have delivered to the Trustee an Officers' 
   Certificate and an Opinion of Counsel, each stating that all 
   conditions precedent provided for relating to either the defeasance 
   under Section 1302 or the covenant defeasance under Section 1303 (as 
   the case may be) have been complied with.  In rendering such Opinion 
   of Counsel, counsel may rely on such Officers' Certificate as to any 
   matters of fact (including as to compliance with the foregoing clauses 
   (1), (2) and (3)).

        SECTION 1305.  Deposited Money and U.S. Government Obligations 
                       -----------------------------------------------
                       to Be Held in Trust; Other Miscellaneous Provisions.
                       ---------------------------------------------------

        Subject to the provisions of the last paragraph of Section 1003, 
all money and U.S. Government Obligations (including the proceeds thereof) 
deposited with the Trustee (or other qualifying trustee, collectively for 
purposes of this Section 1305, the "Trustee") pursuant to Section 1304 in 
respect of the Outstanding Notes shall be held in trust and applied by the 
Trustee, in accordance with the provisions of such Notes and this Indenture, 
to the payment, either directly or through any Paying Agent (including the 
Company acting as its own Paying Agent) as the Trustee may determine, to the 
Holders of such Notes of all sums due and to become due thereon in respect 
of the lesser of Accreted Value or principal amount at Stated Maturity (and 
premium, if any) and interest, but such money need not be segregated from 
other funds except to the extent required by law.

        The Company shall pay and indemnify the Trustee against any tax, 
fee or other charge imposed on or assessed against the U.S. Governmental 
Obligations deposited pursuant to Section 1304 or the principal and interest 
received in respect thereof other than any such tax, fee or other charge 
that by law is for the account of the Holders of the Outstanding Notes.

        Anything in this Article Thirteen to the contrary notwithstanding, 
the Trustee shall deliver or pay to the Company from time to time upon 
Company Request any money or U.S. Government Obligations held by it as 
provided in Section 1304 that, in the opinion of a nationally recognized 
firm of independent public accountants or a nationally recognized 
investment banking firm expressed in a written certification thereof 
delivered to the Trustee, are in excess of the amount thereof that would 
then be required to be deposited to effect an equivalent defeasance or 
covenant defeasance, as applicable, in accordance with this Article.

        SECTION 1306.  Reinstatement.
                       -------------

        If the Trustee or any Paying Agent is unable to apply any money 
in accordance with Section 1305 by reason of any order or judgment of any 
court or governmental authority enjoining, restraining or otherwise 
prohibiting such application, then the Company's obligations under this 
Indenture and the Notes shall be revived and reinstated as though no deposit 
had occurred pursuant to Section 1302 or 1303, as the case may be, until 
such time as the Trustee or Paying Agent is permitted to apply all such 
money in accordance with Section 1305; provided, however, that if the 
                                       --------  -------
Company makes any payment of the Accreted Value or principal amount at 
Stated Maturity (or premium, if any) or interest on any Note following the 
reinstatement of its obligations, the Company shall be subrogated to the 
rights of the Holders of such Notes to receive such payment from the money 
held by the Trustee or Paying Agent.


        IN WITNESS WHEREOF, the parties hereto have caused this 
Indenture to be duly executed and attested, all as of the day and year first 
above written.


                                               TELIGENT, INC.


                                               By
                                                 -------------------------
                                                 Title:


Attest:  
       --------------------------
       Title:


                                               FIRST UNION NATIONAL BANK


                                               By
                                                 -------------------------
                                                 Title:


Attest:  
       ---------------------------
 Title:



===========================================================================


                                  TELIGENT, INC.

                                        TO

                             FIRST UNION NATIONAL BANK,

                                     Trustee



                             -------------------------



                                    Indenture


                          Dated as of February 20, 1998


                             -------------------------


                                   $440,000,000


                           11 1/2% Senior Discount Notes

                                    due 2008



===========================================================================



                                  TELIGENT, INC.

                  Reconciliation and tie between Trust Indenture Act
                 of 1939 and Indenture, dated as of February 20, 1998




Trust Indenture
  Act Section                            Indenture Section

                                                                       

ss 310(a)(1)    .......................................................... 608
      (a)(2)    .......................................................... 608   
      (a)(4)    .......................................................... 608
      (a)(5)    .......................................................... 608
      (b)       .......................................................... 609
ss 311(a)       .......................................................... 613
      (b)       .......................................................... 613
      (b)(2)    .......................................................... 613
ss 312(c)       .......................................................... 701
ss 313(a)       .......................................................... 702
      (b)       .......................................................... 702
      (c)       .......................................................... 702
      (d)       .......................................................... 702
ss 314(a)       .......................................................... 703
      (a)(4)    .......................................................... 1008(a)
      (c)(1)    .......................................................... 102
      (c)(2)    .......................................................... 102
      (c)(3)    .......................................................... 102
      (e)       .......................................................... 102
ss 315(b)       .......................................................... 602 
      (e)       .......................................................... 515
ss 316(a)(last
      sentence) .......................................................... 101 ("Outstanding")
      (a)(1)(A) .......................................................... 502, 512
      (a)(1)(B) .......................................................... 513
      (b)       .......................................................... 508
      (c)       .......................................................... 104(d)
ss 317(a)(1)    .......................................................... 503
      (a)(2)    .......................................................... 504
      (b)       .......................................................... 1003
ss 318(a)       .......................................................... 111




                               TABLE OF CONTENTS 


                                                                          Page

                                                                       
PARTIES...................................................................   1
RECITALS OF THE COMPANY ..................................................   1



                                    ARTICLE ONE

                          DEFINITIONS AND OTHER PROVISIONS
                              OF GENERAL APPLICATION

                                                                       
SECTION 101.  Definitions ................................................   2
Accounts Receivable Subsidiary ...........................................   2
Accreted Value ...........................................................   2
Acquired Debt ............................................................   3
Act ......................................................................   3
Affiliate ................................................................   3
Arrangement Commitment Letter  ...........................................   4
Asset Sale ...............................................................   4
Asset Sale Offer .........................................................   5
Attributable Debt ........................................................   5
Average Life .............................................................   5
Board of Directors  ......................................................   5
Board Resolution .........................................................   5
Business Day .............................................................   5
Capital Lease Obligation .................................................   5
Capital Stock ............................................................   5
Change of Control ........................................................   6
Closing Date .............................................................   6
Commission ...............................................................   6
Common Stock .............................................................   7
Company ..................................................................   7
Company Request" or "Company Order  ......................................   7
Consolidated Interest Expense  ...........................................   7


Note:   This table of contents shall not, for any purpose, be deemed to be a
        part of this Indenture.

Consolidated Net Income ..................................................   7
Corporate Trust Office ...................................................   8
Corporation ..............................................................   8
Credit Agreement .........................................................   8
Currency Hedge Obligations ...............................................   8
Debt .....................................................................   8
Debt Securities ..........................................................   9
Debt to Annualized EBITDA Ratio ..........................................  10
Default ..................................................................  10
Defaulted Interest .......................................................  10
Depositary ...............................................................  10
Disinterested Director ...................................................  10
EBITDA ...................................................................  11
Eligible Cash Equivalents ................................................  11
Event of Default .........................................................  11
Exchange Act .............................................................  12
Exchange Notes ...........................................................  12
Exchange Offer ...........................................................  12
Exchange Offer Registration Statement ....................................  12
Fair Market Value ........................................................  12
Federal Communications Commission ........................................  12
Financing Commitment Letter ..............................................  12
GAAP .....................................................................  12
Global Notes .............................................................  13
Guarantee ................................................................  13
Holder ...................................................................  13
incur ....................................................................  13
Indenture ................................................................  13
Initial Notes ............................................................  13
Interest Payment Date ....................................................  13
Interest Swap Obligations ................................................  14
Invested Capital .........................................................  14
Investment ...............................................................  14
Issue Date ...............................................................  14
Lien .....................................................................  14
Maturity .................................................................  14
Net Cash Proceeds ........................................................  15
Non-U.S. Person ..........................................................  16
Note Register" and "Note Registrar .......................................  16
Notes ....................................................................  16
Officers' Certificate ....................................................  16
Offshore Global Note .....................................................  16
Offshore Physical Note ...................................................  16
Opinion of Counsel .......................................................  16
Outstanding ..............................................................  16
Paying Agent .............................................................  17
Permitted Debt ...........................................................  17
Permitted Holder .........................................................  20
Permitted Investments ....................................................  20
Permitted Liens ..........................................................  20
Permitted Temporary Investments ..........................................  21
Person ...................................................................  21
Physical Notes ...........................................................  21
Pledged Securities .......................................................  22
Predecessor Note .........................................................  22
Private Placement Legend .................................................  22
Proportionate Interest ...................................................  22
Qualified Capital Stock ..................................................  22
QIB ......................................................................  22
Redeemable Capital Stock .................................................  22
Redemption Date ..........................................................  22
Redemption Price .........................................................  22
Registration Rights Agreement ............................................  22
Registration Statement ...................................................  23
Regular Record Date ......................................................  23
Regulation S .............................................................  23
Replacement Assets .......................................................  23
Responsible Officer ......................................................  23
Restricted Payment .......................................................  23
Restricted Subsidiary ....................................................  24
Rule 144A ................................................................  24
Sale and Leaseback Transaction ...........................................  24
Securities Act ...........................................................  24
Senior Notes .............................................................  24
Senior Notes Indenture ...................................................  24
Senior Notes Trustee .....................................................  24
Shelf Registration Statement .............................................  24
Significant Restricted Subsidiary ........................................  24
Special Record Date ......................................................  25
Stated Maturity ..........................................................  25
Subordinated Debt ........................................................  25
Subordinated Stockholder Debt ............................................  25
Subsidiary ...............................................................  25
Subsidiary Guarantee .....................................................  25
Subsidiary Guarantor .....................................................  25
Telecommunications Assets ................................................  26
Telecommunications Assets Debt ...........................................  26
Telecommunications Business ..............................................  26
Transactions..............................................................  26
Trust Indenture Act" or "TIA .............................................  26
Trustee ..................................................................  26
U.S. Global Note .........................................................  26
U.S. Government Obligations ..............................................  27
U.S. Physical Note .......................................................  27
Unrestricted Subsidiary ..................................................  27
Vendor Debt ..............................................................  28
Vice President ...........................................................  28
Voting Stock .............................................................  28
SECTION 102.  Compliance Certificates and Opinions .......................  28
SECTION 103.  Form of Documents Delivered to Trustee .....................  29
SECTION 104.  Acts of Holders ............................................  29
SECTION 105.  Notices, Etc., to Trustee and Company ......................  31
SECTION 106.  Notice to Holders; Waiver ..................................  31
SECTION 107.  Effect of Headings, 
                Table of Contents and Recitals ...........................  32
SECTION 108.  Successors and Assigns .....................................  32
SECTION 109.  Separability Clause ........................................  32
SECTION 110.  Benefits of Indenture ......................................  32
SECTION 111.  Governing Law ..............................................  32
SECTION 112.  Legal Holidays .............................................  32
SECTION 113.  No Recourse Against Others .................................  33
SECTION 114.  Exhibits and Schedules .....................................  33
SECTION 115.  Counterparts ...............................................  33
SECTION 116.  Duplicate Originals ........................................  33
SECTION 117.  Incorporation by Reference of TIA ..........................  33



                                     ARTICLE TWO

                                     NOTES FORMS
                                                                       
SECTION 201.  Forms Generally ............................................  34
SECTION 202.  Restrictive Legends ........................................  35
SECTION 203.  Form of Face of Note .......................................  37
SECTION 204.  Form of Reverse of Note ....................................  39
SECTION 205.  Form of Trustee's Certificate of Authentication ............  43
SECTION 206.  Form of Transfer Notice for Initial Notes ..................  44


                                    ARTICLE THREE

                                      THE NOTES
                                                                        
SECTION 301.  Title and Terms ............................................  46
SECTION 302.  Denominations ..............................................  47
SECTION 303.  Execution, Authentication, Delivery and Dating .............  47
SECTION 304.  Temporary Notes ............................................  49
SECTION 305.  Registration, Registration of 
                Transfer and Exchange ....................................  49
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Notes ................  51
SECTION 307.  Payment of Interest; Interest Rights Preserved .............  51
SECTION 308.  Persons Deemed Owners ......................................  53
SECTION 309.  Cancellation ...............................................  53
SECTION 310.  Computation of Interest ....................................  53
SECTION 311.  Book-Entry Provisions for Global Notes .....................  53
SECTION 312.  Transfer Provisions ........................................  55
SECTION 313.  Form of Regulation S Certificate ...........................  61
SECTION 314.  Form of Rule 144A Certificate ..............................  63
SECTION 315.  CUSIP Numbers ..............................................  64


                                    ARTICLE FOUR

                             SATISFACTION AND DISCHARGE
                                                                        
SECTION 401.  Satisfaction and Discharge of Indenture ....................  64
SECTION 402.  Application of Trust Money .................................  65


                                   ARTICLE FIVE

                                     REMEDIES
                                                                        
SECTION 501.  Events of Default ..........................................  66
SECTION 502.  Acceleration of Maturity; Rescission 
                and Annulment ............................................  68
SECTION 503.  Collection of Debt and Suits for 
                Enforcement by Trustee ...................................  69
SECTION 504.  Trustee May File Proofs of Claim ...........................  69
SECTION 505.  Trustee May Enforce Claims Without 
                Possession of Notes ......................................  70
SECTION 506.  Application of Money Collected .............................  71
SECTION 507.  Limitation on Suits ........................................  71
SECTION 508.  Unconditional Right of Holders to Receive 
                Principal, Premium and Interest ..........................  72
SECTION 509.  Restoration of Rights and Remedies .........................  72
SECTION 510.  Rights and Remedies Cumulative .............................  72
SECTION 511.  Delay or Omission Not Waiver ...............................  72
SECTION 512.  Control by Holders .........................................  73
SECTION 513.  Waiver of Past Defaults ....................................  73
SECTION 514.  Waiver of Stay or Extension Laws ...........................  74
SECTION 515.  Undertaking for Costs ......................................  74



                                        ARTICLE SIX

                                        THE TRUSTEE
                                                                        
SECTION 601.  Certain Duties and Responsibilities ........................  74
SECTION 602.  Notice of Defaults .........................................  75
SECTION 603.  Certain Rights of Trustee ..................................  76
SECTION 604.  Trustee Not Responsible for Recitals or 
                Issuance of Notes ........................................  77
SECTION 605.  May Hold Notes .............................................  77
SECTION 606.  Money Held in Trust ........................................  77
SECTION 607.  Compensation and Reimbursement .............................  77
SECTION 608.  Corporate Trustee Required; Eligibility ....................  78
SECTION 609.  Resignation and Removal; Appointment of 
                Successor ................................................  79
SECTION 610.  Acceptance of Appointment by Successor .....................  80
SECTION 611.  Merger, Conversion, Consolidation or 
                Succession to Business ...................................  81
SECTION 612.  Conflicting Interests ......................................  81
SECTION 613.  Preferential Collection of Claims Against 
                Issuers ..................................................  81


                                ARTICLE SEVEN

                 HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY
                                                                       
SECTION 701.  Disclosure of Names and Addresses of Holders ...............  81
SECTION 702.  Reports by Trustee .........................................  82
SECTION 703.  Reports by Company .........................................  82


                                ARTICLE EIGHT

                 CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE
                                                                        
SECTION 801.  Company May Consolidate, Etc., Only on 
                Certain Terms ............................................  83
SECTION 802.  Successor Substituted ......................................  84



                                ARTICLE NINE

                         SUPPLEMENTAL INDENTURES
                                                                        
SECTION 901.  Supplemental Indentures Without Consent of 
                Holders ..................................................  85
SECTION 902.  Supplemental Indentures with Consent of Holders ............  86
SECTION 903.  Execution of Supplemental Indentures .......................  87
SECTION 904.  Effect of Supplemental Indentures ..........................  87
SECTION 905.  Conformity with Trust Indenture Act ........................  87
SECTION 906.  Reference in Notes to Supplemental Indentures ..............  87
SECTION 907.  Notice of Supplemental Indentures ..........................  88
SECTION 908.  Effect of Consents .........................................  88



                                ARTICLE TEN

                                 COVENANTS
                                                                       
SECTION 1001.  Payment of Principal, Premium, if Any, 
                 and Interest ............................................  88
SECTION 1002.  Maintenance of Office or Agency ...........................  88
SECTION 1003.  Money for Note Payments to Be Held in Trust ...............  89
SECTION 1004.  Corporate Existence .......................................  90
SECTION 1005.  Payment of Taxes and Other Claims .........................  91
SECTION 1006.  Maintenance of Properties .................................  91
SECTION 1007.  Insurance .................................................  91
SECTION 1008.  Statement by Officers as to Default .......................  92
SECTION 1009.  Purchase of Notes upon Change of Control ..................  92
SECTION 1010.  Limitation on Debt ........................................  94
SECTION 1011.  Limitation on Liens .......................................  94
SECTION 1012.  Limitation on Restricted Payments..........................  94
SECTION 1013.  Limitation on Dividend and Other Payment Restrictions 
                 Affecting Restricted Subsidiaries .......................  97
SECTION 1014.  Limitation on Issuances of Certain Guarantees by, 
                 and Debt Securities of, Restricted Subsidiaries .........  98
SECTION 1015.  Limitation on Issuances and Sales of Capital 
                 Stock in Restricted Subsidiaries ........................  99
SECTION 1016.  Limitation on Asset Sales.................................. 100
SECTION 1017.  Transactions with Affiliates............................... 103
SECTION 1018.  Waiver of Certain Covenants ............................... 104
SECTION 1019.  Provision of Financial Information......................... 105


                                ARTICLE ELEVEN

                              REDEMPTION OF NOTES
                                                                       
SECTION 1101.  Right of Redemption ....................................... 105
SECTION 1102.  Applicability of Article .................................. 105
SECTION 1103.  Election to Redeem; Notice to Trustee...................... 106
SECTION 1104.  Selection by Trustee of Notes to Be Redeemed............... 106
SECTION 1105.  Notice of Redemption ...................................... 106
SECTION 1106.  Deposit of Redemption Price ............................... 107
SECTION 1107.  Notes Payable on Redemption Date .......................... 107
SECTION 1108.  Notes Redeemed in Part..................................... 108


                                ARTICLE TWELVE

                           [Intentionally omitted]


                                ARTICLE THIRTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE
                                                                       
SECTION 1301.  Company's Option to Effect Defeasance or 
                 Covenant Defeasance ..................................... 109
SECTION 1302.  Defeasance and Discharge .................................. 109
SECTION 1303.  Covenant Defeasance ....................................... 110
SECTION 1304.  Conditions to Defeasance or Covenant 
                 Defeasance .............................................. 110
SECTION 1305.  Deposited Money and U.S. Government Obligations 
                 to Be Held in Trust; Other Miscellaneous 
                 Provisions .............................................. 112
SECTION 1306.  Reinstatement ............................................. 113



TESTIMONIUM .............................................................. 115

SIGNATURES AND SEALS ..................................................... 115