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




                       UNITED STATES CELLULAR CORPORATION

                          Liquid Yield Option-TM- Notes
                                    due 2015
                           (Zero Coupon-Subordinated)



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


                                    INDENTURE

                         Dated as of _________ __, 1995






                         HARRIS TRUST AND SAVINGS BANK,

                                     TRUSTEE



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

                   -TM-Trademark of Merrill Lynch & Co., Inc.




||                   CROSS REFERENCE TABLE(1)

  TIA                                                 Indenture
Section                                                Section
- -------                                               ---------
310(a)(1)  ...........................................     7.10
   (a)(2)  ...........................................     7.10
   (a)(3)  ...........................................     N.A.
   (a)(4)  ...........................................     N.A.
   (b)     ........................................  7.08; 7.10
   (c)     ...........................................     N.A.
311(a)     ...........................................     7.11
   (b)     ...........................................     7.11
   (c)     ...........................................     N.A.
312(a)     ...........................................     2.05
   (b)     ...........................................    12.03
   (c)     ...........................................    12.03
313(a)     ...........................................     7.06
   (b)(1)  ...........................................     N.A.
   (b)(2)  ...........................................     7.06
   (c)     ...........................................    12.02
   (d)     ...........................................     7.06
314(a)     .................................  4.02; 4.03; 12.02
   (b)     ...........................................     N.A.
   (c)(1)  ...........................................    12.04
   (c)(2)  ...........................................    12.04
   (c)(3)  ...........................................     N.A.
   (d)     ...........................................     N.A.
   (e)     ...........................................    12.05
   (f)     ...........................................     N.A.
315(a)     ...........................................     7.01
   (b)     .......................................  7.05; 12.02
   (c)     ...........................................     7.01
   (d)     ...........................................     7.01
   (e)     ...........................................     6.11
316(a) (last sentence)  ..............................     2.08
   (a)(1)(A)  ........................................     6.05
   (a)(1)(B)  ........................................     6.04
   (a)(2)  ...........................................     N.A.
   (b)     ........................................  6.06; 6.07
317(a)(1)  ...........................................     6.08
   (a)(2)  ...........................................     6.09
   (b)     ...........................................     2.04
 318(a)     ...........................................   12.01

                           N.A. means Not Applicable.

- ------------------------
(1) Note:     This Cross Reference Table shall not, for any purpose, be deemed
              to be part of the Indenture.



                                TABLE OF CONTENTS(1)

                                                                            Page
                                                                            ----
                                    ARTICLE 1

                   DEFINITIONS AND INCORPORATION BY REFERENCE

     SECTION 1.01.  Definitions. . . . . . . . . . . . . . . . . . . . . . . . 1
     SECTION 1.02.  Other Definitions. . . . . . . . . . . . . . . . . . . . . 6
     SECTION 1.03.  Incorporation by Reference of Trust
                     Indenture Act . . . . . . . . . . . . . . . . . . . . . . 7
     SECTION 1.04.  Rules of Construction. . . . . . . . . . . . . . . . . . . 7

                                    ARTICLE 2

                                 THE SECURITIES

     SECTION 2.01.  Form and Dating. . . . . . . . . . . . . . . . . . . . . . 7
     SECTION 2.02.  Execution and Authentication . . . . . . . . . . . . . . . 8
     SECTION 2.03.  Registrar, Paying Agent and Conversion
                     Agent . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     SECTION 2.04.  Paying Agent to Hold Money and
                     Securities in Trust . . . . . . . . . . . . . . . . . . . 9
     SECTION 2.05.  Securityholder Lists . . . . . . . . . . . . . . . . . . .10
     SECTION 2.06.  Transfer and Exchange. . . . . . . . . . . . . . . . . . .10
     SECTION 2.07.  Replacement Securities . . . . . . . . . . . . . . . . . .11
     SECTION 2.08.  Outstanding Securities; Determinations
                     of Holders' Action. . . . . . . . . . . . . . . . . . . .11
     SECTION 2.09.  Temporary Securities . . . . . . . . . . . . . . . . . . .12
     SECTION 2.10.  Cancellation . . . . . . . . . . . . . . . . . . . . . . .13
     SECTION 2.11.  Persons Deemed Owners. . . . . . . . . . . . . . . . . . .13

                                    ARTICLE 3

                            REDEMPTION AND PURCHASES

     SECTION 3.01.  Right to Redeem; Notices to Trustee. . . . . . . . . . . .14
     SECTION 3.02.  Selection of Securities to Be Redeemed . . . . . . . . . .14
     SECTION 3.03.  Notice of Redemption . . . . . . . . . . . . . . . . . . .15
     SECTION 3.04.  Effect of Notice of Redemption . . . . . . . . . . . . . .15
     SECTION 3.05.  Deposit of Redemption Price. . . . . . . . . . . . . . . .16
     SECTION 3.06.  Securities Redeemed in Part. . . . . . . . . . . . . . . .16
     SECTION 3.07.  Conversion Arrangement on Call for
                     Redemption. . . . . . . . . . . . . . . . . . . . . . . .16
     SECTION 3.08.  Purchase of Securities at Option of the
                     Holder. . . . . . . . . . . . . . . . . . . . . . . . . .17


- ---------------------
(1)Note:    This Table of Contents shall not, for any purposes, be deemed to be
            part of the Indenture.


                                      -ii-


     SECTION 3.09.  Purchase of Securities at Option of the
                     Holder upon Change in Control . . . . . . . . . . . . . .27
     SECTION 3.10.  Effect of Purchase Notice or Change in
                     Control Purchase Notice . . . . . . . . . . . . . . . . .32
     SECTION 3.11.  Deposit of Purchase Price or Change in
                     Control Purchase Price. . . . . . . . . . . . . . . . . .33
     SECTION 3.12.  Securities Purchased in Part . . . . . . . . . . . . . . .34
     SECTION 3.13.  Covenant to Comply With Securities Laws
                     Upon Purchase of Securities . . . . . . . . . . . . . . .34
     SECTION 3.14.  Repayment to the Company . . . . . . . . . . . . . . . . .34

                                    ARTICLE 4

                                    COVENANTS

     SECTION 4.01.  Payment of Securities. . . . . . . . . . . . . . . . . . .35
     SECTION 4.02.  SEC and Other Reports. . . . . . . . . . . . . . . . . . .35
     SECTION 4.03.  Compliance Certificate . . . . . . . . . . . . . . . . . .36
     SECTION 4.04.  Further Instruments and Acts . . . . . . . . . . . . . . .36
     SECTION 4.05.  Maintenance of Office or Agency. . . . . . . . . . . . . .36

                                    ARTICLE 5

                              SUCCESSOR CORPORATION

     SECTION 5.01.  When Company May Merge or Transfer
                     Assets. . . . . . . . . . . . . . . . . . . . . . . . . .37

                                    ARTICLE 6

                              DEFAULTS AND REMEDIES

     SECTION 6.01.  Events of Default. . . . . . . . . . . . . . . . . . . . .38
     SECTION 6.02.  Acceleration . . . . . . . . . . . . . . . . . . . . . . .40
     SECTION 6.03.  Other Remedies . . . . . . . . . . . . . . . . . . . . . .41
     SECTION 6.04.  Waiver of Past Defaults. . . . . . . . . . . . . . . . . .41
     SECTION 6.05.  Control by Majority. . . . . . . . . . . . . . . . . . . .41
     SECTION 6.06.  Limitation on Suits. . . . . . . . . . . . . . . . . . . .42
     SECTION 6.07.  Rights of Holders to Receive Payment . . . . . . . . . . .42
     SECTION 6.08.  Collection Suit by Trustee . . . . . . . . . . . . . . . .42
     SECTION 6.09.  Trustee May File Proofs of Claim . . . . . . . . . . . . .43
     SECTION 6.10.  Priorities . . . . . . . . . . . . . . . . . . . . . . . .44
     SECTION 6.11.  Undertaking for Costs. . . . . . . . . . . . . . . . . . .44
     SECTION 6.12.  Waiver of Stay, Extension or Usury Laws. . . . . . . . . .45

                                    ARTICLE 7

                                     TRUSTEE

     SECTION 7.01.  Duties of Trustee. . . . . . . . . . . . . . . . . . . . .45
     SECTION 7.02.  Rights of Trustee. . . . . . . . . . . . . . . . . . . . .46
     SECTION 7.03.  Individual Rights of Trustee . . . . . . . . . . . . . . .48


                                      -iii-


     SECTION 7.04.  Trustee's Disclaimer . . . . . . . . . . . . . . . . . . .48
     SECTION 7.05.  Notice of Defaults . . . . . . . . . . . . . . . . . . . .49
     SECTION 7.06.  Reports by Trustee to Holders. . . . . . . . . . . . . . .49
     SECTION 7.07.  Compensation and Indemnity . . . . . . . . . . . . . . . .49
     SECTION 7.08.  Replacement of Trustee . . . . . . . . . . . . . . . . . .50
     SECTION 7.09.  Successor Trustee by Merger. . . . . . . . . . . . . . . .51
     SECTION 7.10.  Eligibility; Disqualification. . . . . . . . . . . . . . .51
     SECTION 7.11.  Preferential Collection of Claims
                     Against Company . . . . . . . . . . . . . . . . . . . . .51

                                    ARTICLE 8

                             DISCHARGE OF INDENTURE

     SECTION 8.01.  Discharge of Liability on Securities . . . . . . . . . . .52
     SECTION 8.02.  Repayment to the Company . . . . . . . . . . . . . . . . .52

                                    ARTICLE 9

                                   AMENDMENTS

     SECTION 9.01.  Without Consent of Holders . . . . . . . . . . . . . . . .52
     SECTION 9.02.  With Consent of Holders. . . . . . . . . . . . . . . . . .53
     SECTION 9.03.  Compliance with Trust Indenture Act. . . . . . . . . . . .54
     SECTION 9.04.  Revocation and Effect of Consents,
                     Waivers and Actions . . . . . . . . . . . . . . . . . . .54
     SECTION 9.05.  Notation on or Exchange of Securities. . . . . . . . . . .55
     SECTION 9.06.  Trustee to Sign Supplemental Indentures. . . . . . . . . .55
     SECTION 9.07.  Effect of Supplemental Indentures. . . . . . . . . . . . .55

                                   ARTICLE 10

                                  SUBORDINATION

     SECTION 10.01.  Securities Subordinate to Senior
                      Indebtedness . . . . . . . . . . . . . . . . . . . . . .55
     SECTION 10.02.  Payment Over of Proceeds upon
                      Dissolution, Etc . . . . . . . . . . . . . . . . . . . .56
     SECTION 10.03.  Acceleration of Securities. . . . . . . . . . . . . . . .58
     SECTION 10.04.  Default on Senior Indebtedness. . . . . . . . . . . . . .59
     SECTION 10.05.  Payment Permitted If No Default . . . . . . . . . . . . .60
     SECTION 10.06.  Subrogation to Rights of Holders of
                      Senior Indebtedness. . . . . . . . . . . . . . . . . . .61
     SECTION 10.07.  Provisions Solely to Define Relative
                      Rights . . . . . . . . . . . . . . . . . . . . . . . . .61
     SECTION 10.08.  Trustee to Effectuate Subordination . . . . . . . . . . .62
     SECTION 10.09.  No Waiver of Subordination Provisions . . . . . . . . . .62
     SECTION 10.10.  Notice to Trustee . . . . . . . . . . . . . . . . . . . .63
     SECTION 10.11.  Reliance on Judicial Order or
                      Certificate of Liquidating Agent . . . . . . . . . . . .64
     SECTION 10.12.  Trustee Not Fiduciary for Holders of
                      Senior Indebtedness. . . . . . . . . . . . . . . . . . .64


                                      -iv-


     SECTION 10.13.  Rights of Trustee as Holder of Senior
                      Indebtedness; Preservation of Trustee's
                      Rights . . . . . . . . . . . . . . . . . . . . . . . . .64
     SECTION 10.14.  Article 10 Applicable to Paying Agents
                      and Conversion Agents. . . . . . . . . . . . . . . . . .64

                                   ARTICLE 11

                                   CONVERSION

     SECTION 11.01.  Conversion Privilege. . . . . . . . . . . . . . . . . . .65
     SECTION 11.02.  Conversion Procedure. . . . . . . . . . . . . . . . . . .67
     SECTION 11.03.  Fractional Shares . . . . . . . . . . . . . . . . . . . .69
     SECTION 11.04.  Taxes on Conversion . . . . . . . . . . . . . . . . . . .69
     SECTION 11.05.  Company to Provide Common Shares. . . . . . . . . . . . .70
     SECTION 11.06.  Adjustment for Change in Capital Stock. . . . . . . . . .70
     SECTION 11.07.  Adjustment for Rights Issue . . . . . . . . . . . . . . .71
     SECTION 11.08.  Adjustment for Other Distributions. . . . . . . . . . . .72
     SECTION 11.09.  When Adjustment May Be Deferred . . . . . . . . . . . . .75
     SECTION 11.10.  When No Adjustment Required . . . . . . . . . . . . . . .75
     SECTION 11.11.  Notice of Adjustment. . . . . . . . . . . . . . . . . . .76
     SECTION 11.12.  Voluntary Increase. . . . . . . . . . . . . . . . . . . .76
     SECTION 11.13.  Notice of Certain Transactions. . . . . . . . . . . . . .76
     SECTION 11.14.  Reorganization of Company; Special
                      Distributions. . . . . . . . . . . . . . . . . . . . . .76
     SECTION 11.15.  Company Determination Final . . . . . . . . . . . . . . .77
     SECTION 11.16.  Trustee's Adjustment Disclaimer . . . . . . . . . . . . .78
     SECTION 11.17.  Simultaneous Adjustments. . . . . . . . . . . . . . . . .78
     SECTION 11.18.  Successive Adjustments. . . . . . . . . . . . . . . . . .78
     SECTION 11.19.  Common Share Delivery Arrangement . . . . . . . . . . . .78

                                   ARTICLE 12

                                  MISCELLANEOUS

     SECTION 12.01.  Trust Indenture Act Controls. . . . . . . . . . . . . . .81
     SECTION 12.02.  Notices . . . . . . . . . . . . . . . . . . . . . . . . .81
     SECTION 12.03.  Communication by Holders with Other
                      Holders. . . . . . . . . . . . . . . . . . . . . . . . .82
     SECTION 12.04.  Certificate and Opinion as to
                      Conditions Precedent . . . . . . . . . . . . . . . . . .82
     SECTION 12.05.  Statements Required in Certificate or
                      Opinion. . . . . . . . . . . . . . . . . . . . . . . . .83
     SECTION 12.06.  Separability Clause . . . . . . . . . . . . . . . . . . .83
     SECTION 12.07.  Rules by Trustee, Paying Agent,
                      Conversion Agent and Registrar . . . . . . . . . . . . .83
     SECTION 12.08.  GOVERNING LAW . . . . . . . . . . . . . . . . . . . . . .83
     SECTION 12.09.  No Recourse Against Others. . . . . . . . . . . . . . . .83
     SECTION 12.10.  Successors. . . . . . . . . . . . . . . . . . . . . . . .83
     SECTION 12.11.  Multiple Originals. . . . . . . . . . . . . . . . . . . .84


                                       -v-


          INDENTURE dated as of _________ __, 1995 between UNITED STATES
CELLULAR CORPORATION, a Delaware corporation ("COMPANY"), and HARRIS TRUST AND
SAVINGS BANK ("TRUSTEE").

          Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the Holders of the Company's Liquid Yield
Option-TM- Notes due 2015 (Zero Coupon - Subordinated):


                                    ARTICLE 1

                   DEFINITIONS AND INCORPORATION BY REFERENCE

          SECTION 1.01.  DEFINITIONS.

          "AFFILIATE" of any specified person means any other person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified person; "CONTROL" when used with respect to any
specified person means the power to direct or cause the direction of the
management and policies of such person, directly or indirectly, whether through
the ownership of voting securities, by contract or otherwise; and the terms
"CONTROLLING" and "CONTROLLED" have meanings correlative to the foregoing.

          "BOARD OF DIRECTORS" means, with respect to any matter, either the
board of directors of the Company or any committee of such board duly
authorized, with respect to such matter, to exercise the powers of such board.

          "BUSINESS DAY" means each day of the year on which banking
institutions are not required or authorized to close in the City of New York,
New York or the City of Chicago, Illinois.

          "CAPITAL STOCK" for any corporation means any and all shares,
interests, rights to purchase, warrants, options, participations or other
equivalents of or interests in (however designated) stock issued by that
corporation.

          "CASH" or "cash" means such coin or currency of the United States of
America as at any time of payment is legal tender for the payment of public and
private debts.

          "COMMON SHARES" means the Common Shares, par value $1.00 per share, of
the Company as they exist on the date of this


- -----------------------
- -TM- Trademark of Merrill Lynch & Co., Inc.



Indenture or any other shares of Capital Stock of the Company into which the
Common Shares shall be reclassified or changed.

          "COMPANY" means the party named as the "Company" in the first
paragraph of this Indenture until a successor replaces it pursuant to the
applicable provisions of this Indenture and, thereafter, shall mean such
successor.  The foregoing sentence shall likewise apply to any subsequent such
successor or successors.

          "COMPANY REQUEST" or "COMPANY ORDER" means a written request or order
signed in the name of the Company by its Chairman of the Board, its President, a
Senior Vice President or a Vice President, and by its Treasurer, an Assistant
Treasurer, its Secretary or an Assistant Secretary, and delivered to the
Trustee.

          "DEBT" means with respect to any person at any date, without
duplication, (i) all obligations of such person for borrowed money, (ii) all
obligations of such person evidenced by bonds, debentures, notes or other
similar instruments, other than any account payable or other accrued current
liability or obligation incurred in the ordinary course of business in
connection with the obtaining of materials or services, (iii) all Debt of others
secured by a lien on any asset of such person, whether or not such Debt is
assumed by such person, (iv) all obligations of such person with respect to
letters of credit (or local guaranties, as applicable) or bankers' acceptances
issued for the account of such person or with respect to interest rate
protection agreements or currency exchange or purchase agreements, (v) all
obligations of such person in respect to leases of such person as lessee which,
in conformity with generally accepted accounting principles, are required to be
accounted for as capitalized lease obligations on the balance sheet of such
person, (vi) all obligations of such person issued or assumed as the deferred
purchase price of property, all conditional sale obligations of such person and
all obligations of such person under any title retention agreement, and (vii)
all Debt of others for the payment of which such person is responsible or liable
as obligor or guarantor, including, without limitation, obligations (contingent
or otherwise) to purchase or otherwise acquire, or otherwise to assure a
creditor against loss in respect of, indebtedness or obligations of others of
the type described in clauses (i) through (vi).

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

- --------------------
- -TM- Trademark of Merrill Lynch & Co., Inc.


                                       -2-


          "HOLDER" or "SECURITYHOLDER" means a person in whose name a Security
is registered on the Registrar's books.

          "INDENTURE" means this Indenture, as amended or supplemented from time
to time in accordance with the terms hereof, including the provisions of the TIA
that are deemed to be a part hereof.

          "ISSUE DATE" of any Security means the date on which the Security was
originally issued or deemed issued as set forth on the face of the Security.

          "ISSUE PRICE" of any Security means, in connection with the original
issuance of such Security, the initial issue price at which the Security is sold
as set forth on the face of the Security.

          "OFFICER" means the Chairman of the Board, the President, any Senior
Vice President, any Vice President, the Treasurer, the Secretary, the
Controller, any Assistant Treasurer, any Assistant Secretary or any Assistant
Controller of the Company.

          "OFFICERS' CERTIFICATE" means a written certificate containing the
information specified in Sections 12.04 and 12.05, signed in the name of the
Company by its Chairman of the Board, its President, a Senior Vice President or
a Vice President, and by its Treasurer, an Assistant Treasurer, its Secretary,
an Assistant Secretary, its Controller or an Assistant Controller, and delivered
to the Trustee.  An Officers' Certificate given pursuant to Section 4.03 shall
be signed by the principal executive, financial or accounting officer of the
Company but need not contain the information specified in Sections 12.04 and
12.05.

          "OPINION OF COUNSEL" means a written opinion containing the
information specified in Sections 12.04 and 12.05, from legal counsel who is
reasonably acceptable to the Trustee.  The counsel may be an employee of, or
counsel to, the Company or the Trustee.

          "ORIGINAL ISSUE DISCOUNT" of any Security means the difference between
the Issue Price and the Principal Amount at Maturity of the Security as set
forth on the face of the Security.

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


                                       -3-


          "PRINCIPAL AMOUNT AT MATURITY" of a Security means the Principal
Amount at Maturity as set forth on the face of the Security.

          "REDEMPTION DATE" or "REDEMPTION DATE" shall mean the date specified
for redemption of the Securities in accordance with the terms of the Securities
and this Indenture.

          "REDEMPTION PRICE" or "REDEMPTION PRICE" shall have the meaning set
forth in paragraph 5 of the Securities.

          "RESPONSIBLE OFFICER", when used with respect to the Trustee, means
any officer within the Corporate Trust Department (or any successor group)
including without limitation any vice president, any assistant vice president,
any trust officer, any assistant secretary or any other officer of the Trustee
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 officer to whom such matter is referred because of his
knowledge of and familiarity with the particular subject.

          "SEC" means the Securities and Exchange Commission, as from time to
time constituted, created under the Exchange Act 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 bodies
performing such duties at such time.

          "SECURITIES" means any of the Company's Liquid Yield Option Notes due
2015 (Zero Coupon-Subordinated), as amended or supplemented from time to time,
issued under this Indenture.

          "SECURITYHOLDER" or "HOLDER" means a person in whose name a Security
is registered on the Registrar's books.

          "SERIES A COMMON SHARES" means the Series A Common Shares, par value
$1.00 per share, of the Company as they exist on the date of this Indenture or
any other shares of Capital Stock of the Company into which the Series A Common
Shares shall be reclassified or changed.

          "STATED MATURITY", when used with respect to any Security, means the
date specified in such Security as the fixed date on which an amount equal to
the Principal Amount at Maturity of such Security is due and payable.

          "SUBSIDIARY" means (i) a corporation, a majority of whose Capital
Stock with voting power, under ordinary circumstances, to elect directors is, at
the date of determination, directly or indirectly owned by the Company, by one
or more Subsidiaries of the Company or by the Company and one


                                       -4-


or more Subsidiaries of the Company, (ii) a partnership in which the Company or
a Subsidiary of the Company holds a majority interest in the equity capital or
profits of such partnership, or (iii) any other person (other than a
corporation) in which the Company, a Subsidiary of the Company or the Company
and one or more Subsidiaries of the Company, directly or indirectly, at the date
of determination, has (x) at least a majority ownership interest or (y) the
power to elect or direct the election of a majority of the directors or other
governing body of such person.

          "TDS" means Telephone and Data Systems, Inc., an Iowa corporation, and
any successors.

          "TDS COMMON EQUITY SECURITIES" means common equity securities of TDS
which are publicly traded at the applicable time such common equity securities
are being referred to herein.

          "TIA" means the Trust Indenture Act of 1939 as in effect on the date
of this Indenture, provided, however, that in the event the TIA is amended after
such date, TIA means, to the extent required by any such amendment, the TIA as
so amended.

          "TRADING DAY" means a day during which trading in securities generally
occurs on the American Stock Exchange or, if the Common Shares or the specified
TDS Common Equity Securities, as applicable, are not listed on the American
Stock Exchange, on the principal other national or regional securities exchange
on which the Common Shares or the specified TDS Common Equity Securities, as
applicable, are then listed or, if the Common Shares or the specified TDS Common
Equity Securities, as applicable, are not listed on a national or regional
securities exchange, on The Nasdaq Stock Market or, if the Common Shares or the
specified TDS Common Equity Securities, as applicable, are not quoted on The
Nasdaq Stock Market, on the principal other market on which the Common Shares or
the specified TDS Common Equity Securities, as applicable, are then traded.

          "TRUSTEE" means the party named as the "Trustee" in the first
paragraph of this Indenture until a successor replaces it pursuant to the
applicable provisions of this Indenture and, thereafter, shall mean such
successor.  The foregoing sentence shall likewise apply to any subsequent such
successor or successors.


                                       -5-


                        SECTION 1.02.  OTHER DEFINITIONS.

                                                            Defined in
          Term                                               Section
          ----                                              ----------
"ASSOCIATE" ............................................      3.09(a)
"AVERAGE QUOTED PRICE" .................................     11.01
"BANKRUPTCY LAW" .......................................      6.01
"BENEFICIAL OWNER" .....................................      3.09(a)
"CARLSON FAMILY"  ......................................      3.09
"CHANGE IN CONTROL" ....................................      3.09(a)
"CHANGE IN CONTROL PURCHASE DATE" ......................      3.09(a)
"CHANGE IN CONTROL PURCHASE NOTICE" ....................      3.09(c)
"CHANGE IN CONTROL PURCHASE PRICE" .....................      3.09(a)
"COMMON SHARE DELIVERY ARRANGEMENT" ....................     11.19
"COMPANY NOTICE" .......................................      3.08(e)
"COMPANY NOTICE DATE"...................................      3.08(c)
"CONVERSION AGENT" .....................................      2.03
"CONVERSION DATE" ......................................     11.02
"CONVERSION RATE" ......................................     11.01
"CUSTODIAN" ............................................      6.01
"DESIGNATED TRANSACTION"  ..............................      3.09
"EVENT OF DEFAULT" .....................................      6.01
"EXCHANGE ACT" .........................................      3.08(d)
"EX-DIVIDEND TIME" .....................................     11.01
"EXTRAORDINARY CASH DIVIDEND" ..........................     11.08
"MARKET PRICE" .........................................      3.08(d)
"MOODY'S"  .............................................      3.09
"NOTICE OF DEFAULT" ....................................      6.01
"OPTIONAL PURCHASE DATE" ...............................      3.08(a)
"OVER-ALLOTMENT OPTION" ................................      2.02
"PAYING AGENT" .........................................      2.03
"PURCHASE DATE" ........................................      3.08(a)
"PURCHASE NOTICE" ......................................      3.08(a)
"PURCHASE PRICE" .......................................      3.08(a)
"QUOTED PRICE" .........................................     11.01
"RATING AGENCY"  .......................................      3.09
"RATING CATEGORY"  .....................................      3.09
"RATING DATE"  .........................................      3.09
"RATING DECLINE"  ......................................      3.09
"RATING PERIOD"  .......................................      3.09
"REFERENCE DATE"  ......................................      3.09
"REGISTRAR" ............................................      2.03
"S&P"  .................................................      3.09
"SALE PRICE" ...........................................      3.08(d)
"SECURITIES ACT" .......................................      3.08(d)
"SENIOR INDEBTEDNESS"...................................     10.01
"SPECIFIED TDS COMMON EQUITY SECURITIES"................      3.08(b)
"STANDBY SHARE DELIVERER"...............................     11.19
"TIME OF DETERMINATION" ................................     11.01


                                       -6-


          SECTION 1.03.  INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT.
Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.  The following
TIA terms used in this Indenture have the following meanings:

          "COMMISSION" means the SEC.

          "INDENTURE SECURITIES" means the Securities.

          "INDENTURE SECURITY HOLDER" means a Securityholder.

          "INDENTURE TO BE QUALIFIED" means this Indenture.

          "INDENTURE TRUSTEE" or "INSTITUTIONAL TRUSTEE" means the Trustee.

          "OBLIGOR" on the indenture securities means the Company.

          All other TIA terms used in this Indenture that are defined by the
TIA, defined by TIA reference to another statute or defined by SEC rule have the
meanings assigned to them by such definitions.

          SECTION 1.04.  RULES OF CONSTRUCTION.  Unless the context otherwise
requires:

          (1) a term has the meaning assigned to it;

          (2) an accounting term not otherwise defined has the meaning assigned
      to it in accordance with generally accepted accounting principles as in
      effect from time to time;

          (3) "or" is not exclusive;

          (4) "including" means including, without limitation; and

          (5) words in the singular include the plural, and words in the plural
      include the singular.


                                    ARTICLE 2

                                 THE SECURITIES

          SECTION 2.01.  FORM AND DATING.  The Securities and the Trustee's
certificate of authentication shall be substantially in the form of Exhibit A,
which is a part of this Indenture.  The Securities may have notations, legends
or endorsements required by law, stock exchange rule or usage (provided that any
such


                                       -7-


notation, legend or endorsement required by usage is in a form acceptable to the
Company).  The Company shall provide any such notations, legends or endorsements
to the Trustee in writing.  Each Security shall be dated the date of its
authentication.

          SECTION 2.02.  EXECUTION AND AUTHENTICATION.  The Securities shall be
executed on behalf of the Company by its Chairman of the Board, its President,
one of its Senior Vice Presidents or one of its Vice Presidents, under its
corporate seal reproduced thereon and attested by its Secretary or one of its
Assistant Secretaries.  The signature of any of these officers on the Securities
may be manual or facsimile.

          Securities bearing the manual or facsimile signatures of individuals
who were at the time of the execution of the Securities 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 Securities or did not hold such offices at the date of
authentication of such Securities.

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

          The Trustee shall authenticate and deliver Securities for original
issue in an aggregate Principal Amount at Maturity of up to $755,000,000 upon a
Company Order without any further action by the Company; PROVIDED, HOWEVER, that
in the event that the Company sells any Securities pursuant to the underwriter's
over-allotment option (the "OVER-ALLOTMENT OPTION") granted pursuant to Section
2 of the Purchase Agreement between the Company and Merrill Lynch, Pierce,
Fenner & Smith Incorporated dated _________ __, 1995 then the Trustee shall
authenticate and deliver Securities for original issue in an aggregate Principal
Amount at Maturity of up to $755,000,000 plus up to $110,000,000 aggregate
Principal Amount at Maturity of Securities sold pursuant to the Over-Allotment
Option upon a Company Order without any further action by the Company.  The
aggregate Principal Amount at Maturity of Securities outstanding at any time may
not exceed the amount set forth in the foregoing sentence, subject to the
proviso set forth therein, except as provided in Section 2.07.

          The Securities shall be issued only in registered form without coupons
and only in denominations of $1,000 of Principal Amount at Maturity and any
integral multiple thereof.


                                       -8-


          SECTION 2.03.  REGISTRAR, PAYING AGENT AND CONVERSION AGENT.  The
Company shall maintain an office or agency where Securities may be presented for
registration of transfer or for exchange ("REGISTRAR"), an office or agency
where Securities may be presented for purchase or payment ("PAYING AGENT") and
an office or agency where Securities may be presented for conversion
("CONVERSION AGENT").  The Registrar shall keep a register of the Securities and
of their transfer and exchange.  The Company may have one or more co-registrars,
one or more additional paying agents and one or more additional conversion
agents.  The term Registrar includes any co-registrar, including any named
pursuant to Section 4.05.  The term Paying Agent includes any additional paying
agent, including any named pursuant to Section 4.05.  The term Conversion Agent
includes any additional conversion agent, including any named pursuant to
Section 4.05.

          The Company shall enter into an appropriate agency agreement with any
Registrar, Paying Agent, Conversion Agent or co-registrar (other than the
Trustee).  The agreement shall implement the provisions of this Indenture that
relate to such agent.  The Company shall notify the Trustee of the name and
address of any such agent.  If the Company fails to maintain a Registrar, Paying
Agent or Conversion Agent, the Trustee shall act as such and shall be entitled
to appropriate compensation therefor pursuant to Section 7.07.  The Company or
any Subsidiary or an Affiliate of either of them may act as Paying Agent,
Registrar, Conversion Agent or co-registrar.

          The Company initially appoints the Trustee as Registrar, Conversion
Agent and Paying Agent in connection with the Securities.

          SECTION 2.04.  PAYING AGENT TO HOLD MONEY AND SECURITIES IN TRUST.
Except as otherwise provided herein, on or prior to each due date of payments in
respect of any Security, the Company shall deposit with the Paying Agent a sum
of money (in immediately available funds if deposited on the due date) or, if
permitted by the terms hereof, securities sufficient to make such payments when
so becoming due.  The Company shall require each Paying Agent (other than the
Trustee) to agree in writing that the Paying Agent shall hold in trust for the
benefit of Securityholders or the Trustee all money and securities held by the
Paying Agent for the making of payments in respect of the Securities and shall
notify the Trustee of any default by the Company in making any such payment.  At
any time during the continuance of any such default, the Paying Agent shall,
upon the written request of the Trustee, forthwith pay to the Trustee all money
and securities so held in trust.  If the Company, a Subsidiary or an Affiliate
of either of them acts as Paying Agent, it shall segregate the money and
securities held by it as Paying Agent and hold it as a separate trust fund.  The
Company at any time may require a Paying Agent to pay all money and


                                       -9-


securities held by it to the Trustee and to account for any money and securities
disbursed by it.  Upon doing so, the Paying Agent shall have no further
liability for the money or securities.

          SECTION 2.05.  SECURITYHOLDER LISTS.  The Trustee shall preserve in as
current a form as is reasonably practicable the most recent list available to it
of the names and addresses of Securityholders.  If the Trustee is not the
Registrar, the Company shall cause to be furnished to the Trustee at least
semiannually on ____________ __ and ____________ __ a listing of Securityholders
dated within 15 days of the date on which the list is furnished and at such
other times as the Trustee may request in writing a list in such form and as of
such date as the Trustee may reasonably require of the names and addresses of
Securityholders.

          SECTION 2.06.  TRANSFER AND EXCHANGE.  Upon surrender for registration
of transfer of any Security, together with a written instrument of transfer
satisfactory to the Company and Registrar duly executed by the Securityholder or
such Securityholder's attorney duly authorized in writing, at the office or
agency of the Company designated as Registrar pursuant to Section 2.03, the
Company shall execute, and the Trustee shall authenticate and deliver, in the
name of the designated transferee or transferees, one or more new Securities of
any authorized denomination or denominations, of a like aggregate Principal
Amount at Maturity.  The Company shall not charge a service charge for any
registration of transfer or exchange, but the Company may require payment of a
sum sufficient to pay all taxes, assessments or other governmental charges that
may be imposed in connection with the transfer or exchange of the Securities
from the Securityholder requesting such transfer or exchange.

          At the option of the Holder, Securities may be exchanged for other
Securities of any authorized denomination or denominations, of a like aggregate
Principal Amount at Maturity, upon surrender of the Securities to be exchanged,
together with a written instrument of transfer satisfactory to the Registrar
duly executed by the Securityholder or such Securityholder's attorney duly
authorized in writing, at such office or agency.  Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

          The Company shall not be required to make, and the Registrar need not
register, transfers or exchanges of (a) Securities selected for redemption
(except, in the case of Securities to be redeemed in part, the portion thereof
not to be redeemed), (b) any Securities in respect of which a Purchase Notice or
Change in Control Purchase Notice has been given and


                                      -10-


not withdrawn by the Holder thereof in accordance with the terms of this
Indenture (except, in the case of Securities to be purchased in part, the
portion thereof not to be purchased) or (c) any Securities for a period of 15
days before a selection of Securities to be redeemed.

          SECTION 2.07.  REPLACEMENT SECURITIES.  If (a) any mutilated Security
is surrendered to the Trustee, or (b) the Company and the Trustee receive
evidence to their satisfaction of the destruction, loss or theft of any
Security, 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 Security has been
acquired by a bona fide purchaser, the Company shall execute and upon a Company
Order the Trustee shall authenticate and deliver, in exchange for any such
mutilated Security or in lieu of any such destroyed, lost or stolen Security, a
new Security of like tenor and Principal Amount at Maturity, bearing a number
not contemporaneously outstanding.

          In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, or is about to be purchased by the
Company pursuant to Article 3 hereof, the Company in its discretion may, instead
of issuing a new Security, pay or purchase such Security, as the case may be.

          Upon the issuance of any new Securities 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 new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Security 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 Securities 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 Securities.

          SECTION 2.08.  OUTSTANDING SECURITIES; DETERMINATIONS OF HOLDERS'
ACTION.  Securities outstanding at any time are all the Securities authenticated
by the Trustee except for those cancelled by it, those delivered to it for
cancellation and those described in this Section 2.08 as not outstanding.  A
Security does not cease to be outstanding because the Company or an


                                      -11-


Affiliate thereof holds the Security; PROVIDED, HOWEVER, that in determining
whether the Holders of the requisite Principal Amount at Maturity of Securities
have given or concurred in any request, demand, authorization, direction,
notice, consent or waiver hereunder, Securities owned by the Company or any
other obligor upon the Securities 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 relying upon any such
request, demand, authorization, direction, notice, consent or waiver, only
Securities which the Trustee knows to be so owned shall be so disregarded.
Subject to the foregoing, only Securities outstanding at the time of such
determination shall be considered in any such determination (including, without
limitation, determinations pursuant to Articles 6 and 9).

          If a Security is replaced pursuant to Section 2.07, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.

          If the Paying Agent holds, in accordance with this Indenture, on a
Redemption Date, or on the Business Day following the Purchase Date, the
Optional Purchase Date, if applicable, or a Change in Control Purchase Date, or
on Stated Maturity, money or, if permitted hereunder, securities sufficient to
pay Securities payable on that date, then immediately after such Redemption
Date, Purchase Date, Optional Purchase Date, Change in Control Purchase Date or
Stated Maturity, as the case may be, such Securities shall cease to be
outstanding and Original Issue Discount and interest, if any, on such Securities
shall cease to accrue and all other rights of the Holder shall terminate (other
than the right to receive the applicable Redemption Price, Purchase Price,
Change in Control Purchase Price or Principal Amount at Maturity, as the case
may be, upon delivery of the Security in accordance with the terms of this
Indenture); PROVIDED, that if such Securities are to be redeemed, notice of such
redemption has been duly given pursuant to this Indenture or provision therefor
satisfactory to the Trustee has been made.

          If a Security is converted in accordance with Article 11 (other than
pursuant to a Common Share Delivery Arrangement), then from and after the time
of such conversion on the Conversion Date, such Security shall cease to be
outstanding and Original Issue Discount and interest, if any, shall cease to
accrue on such Security and all other rights of the Holder shall terminate
(other than the right to receive cash, securities or other property upon
conversion in accordance with Article 11).

          SECTION 2.09.  TEMPORARY SECURITIES.  Pending the preparation of
definitive Securities, the Company may execute, and upon Company Order the
Trustee shall authenticate and


                                      -12-


deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Securities in lieu of which they
are issued and with such appropriate insertions, omissions, substitutions and
other variations as the officers executing such Securities may determine, as
conclusively evidenced by their execution of such Securities.

          If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay.  After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at the office
or agency of the Company designated for such purpose pursuant to Section 2.03,
without charge to the Holder.  Upon surrender for cancellation of any one or
more temporary Securities the Company shall execute and the Trustee shall
authenticate and deliver in exchange therefor a like Principal Amount at
Maturity of definitive Securities of authorized denominations.  Until so
exchanged the temporary Securities shall in all respects be entitled to the same
benefits under this Indenture as definitive Securities.

          SECTION 2.10.  CANCELLATION.  All Securities surrendered for payment,
purchase by the Company pursuant to Article 3, conversion (other than pursuant
to a Common Share Delivery Arrangement), redemption or 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 Securities previously
authenticated and delivered hereunder which the Company may have acquired in any
manner whatsoever, and all Securities so delivered shall be promptly cancelled
by the Trustee.  The Company may not issue new Securities to replace Securities
it has paid or delivered to the Trustee for cancellation or that any Holder has
converted pursuant to Article 11 (other than pursuant to a Common Share Delivery
Arrangement).  No Securities shall be authenticated in lieu of or in exchange
for any Securities cancelled as provided in this Section, except as expressly
permitted by this Indenture.  All cancelled Securities held by the Trustee shall
be destroyed by the Trustee and the Trustee shall deliver a certificate of
destruction to the Company quarterly.

          SECTION 2.11.  PERSONS DEEMED OWNERS.  Prior to due presentment of a
Security 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 Security is
registered as the owner of such Security for the purpose of receiving payment of
principal of the Security or the payment of any Redemption Price, Purchase Price
or Change in Control Purchase Price in


                                      -13-


respect thereof, and interest thereon, for the purpose of conversion and for all
other purposes whatsoever, whether or not such Security be overdue, and neither
the Company, the Trustee nor any agent of the Company or the Trustee shall be
affected by notice to the contrary.


                                    ARTICLE 3

                            REDEMPTION AND PURCHASES

          SECTION 3.01.  RIGHT TO REDEEM; NOTICES TO TRUSTEE.  The Company, at
its option, may redeem the Securities in accordance with the provisions of
paragraphs 5 and 7 of the Securities.  If the Company elects to redeem
Securities pursuant to paragraph 5 of the Securities, it shall notify the
Trustee in writing of the Redemption Date, the Principal Amount at Maturity of
Securities to be redeemed and the Redemption Price.

          The Company shall give the notice to the Trustee provided for in this
Section 3.01 by a Company Order at least 45 days before the Redemption Date
(unless a shorter notice shall be satisfactory to the Trustee).

          SECTION 3.02.  SELECTION OF SECURITIES TO BE REDEEMED.  If less than
all the Securities are to be redeemed, the Trustee shall select the Securities
to be redeemed pro rata or by lot or by any other method the Trustee considers
fair and appropriate (so long as such method is not prohibited by the rules of
any stock exchange on which the Securities are then listed).  The Trustee shall
make the selection at least 30 days but not more than 60 days before the
Redemption Date from outstanding Securities not previously called for
redemption.  The Trustee may select for redemption portions of the Principal
Amount at Maturity of Securities that have denominations larger than $1,000.
Securities and portions of them the Trustee selects shall be in Principal
Amounts at Maturity of $1,000 or an integral multiple of $1,000.  Provisions of
this Indenture that apply to Securities called for redemption also apply to
portions of Securities called for redemption.  The Trustee shall notify the
Company promptly of the Securities or portions of Securities to be redeemed.

          If any Security selected for partial redemption is converted in part
before termination of the conversion right with respect to the portion of the
Security so selected, the converted portion of such Security so selected for
redemption shall be deemed (so far as may be) to be the portion selected for
redemption.  Securities which have been converted during a selection of
Securities to be redeemed may be treated by the Trustee as outstanding for the
purpose of such selection.


                                      -14-


          SECTION 3.03.  NOTICE OF REDEMPTION.  At least 30 days but not more
than 60 days before a Redemption Date, the Company shall mail a notice of
redemption by first-class mail, postage prepaid, to each Holder of Securities to
be redeemed.

          The notice shall identify the Securities to be redeemed and shall
state:

          (1)  the Redemption Date;

          (2)  the Redemption Price;

          (3)  the Conversion Rate;

          (4)  the name and address of the Paying Agent and Conversion Agent;

          (5)  that Securities called for redemption may be converted at any
     time before the close of business on the Redemption Date;

          (6)  that Holders who want to convert Securities must satisfy the
     requirements set forth in paragraph 9 of the Securities;

          (7)  that Securities called for redemption must be surrendered to the
     Paying Agent to collect the Redemption Price;

          (8)  if fewer than all the outstanding Securities are to be redeemed,
     the certificate number and Principal Amounts at Maturity of the particular
     Securities to be redeemed;

          (9)  that, unless the Company defaults in making payment of such
     Redemption Price, Original Issue Discount on Securities called for
     redemption, and interest, if any, will cease to accrue immediately after
     the Redemption Date; and

          (10)  the CUSIP number of the Securities.

          At the Company's request, the Trustee shall give the notice of
redemption in the Company's name and at the Company's expense, provided that the
Company makes such request at least three Business Days prior to such notice of
redemption.

          SECTION 3.04.  EFFECT OF NOTICE OF REDEMPTION.  Once notice of
redemption is given, Securities called for redemption become due and payable on
the Redemption Date and at the Redemption Price stated in the notice except for
Securities that are converted in accordance with the terms of this Indenture.
Upon the later of the Redemption Date and the date such Securities are
surrendered to the Paying Agent, such Securities


                                      -15-


called for Redemption shall be paid at the Redemption Price stated in the
notice.

          SECTION 3.05.  DEPOSIT OF REDEMPTION PRICE.  Prior to or on the
Redemption Date, the Company shall deposit with the Paying Agent (or if the
Company or a Subsidiary or an Affiliate of either of them is the Paying Agent,
shall segregate and hold in trust) money sufficient to pay the Redemption Price
of all Securities to be redeemed on that date other than Securities or portions
of Securities called for redemption which on or prior thereto have been
delivered by the Company to the Trustee for cancellation or that the Conversion
Agent has informed the Trustee have been converted.  The Paying Agent shall as
promptly as practicable return to the Company any money, with interest, if any,
thereon (subject to the provisions of Section 7.01(f)), not required for that
purpose because of conversion of Securities pursuant to Article 11.  If such
money is then held by the Company or a Subsidiary or an Affiliate of either in
trust and is not required for such purpose it shall be discharged from such
trust.

          SECTION 3.06.  SECURITIES REDEEMED IN PART.  Upon surrender of a
Security that is redeemed in part, the Company shall execute and the Trustee
shall authenticate and deliver to the Holder a new Security in an authorized
denomination equal in Principal Amount at Maturity to the unredeemed portion of
the Security surrendered.

          SECTION 3.07.  CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION.  In
connection with any redemption of Securities, the Company may arrange for the
purchase and conversion of any Securities called for redemption by an agreement
with one or more investment bankers or other purchasers to purchase such
Securities by paying to the Paying Agent in trust for the Securityholders, on or
before the close of business on the Redemption Date, an amount that, together
with any amounts deposited with the Paying Agent by the Company for the
redemption of such Securities, is not less than the Redemption Price, together
with interest, if any, accrued to the Redemption Date, of such Securities.
Notwithstanding anything to the contrary contained in this Article 3, the
obligation of the Company to pay the Redemption Price of such Securities,
including all accrued interest, if any, shall be deemed to be satisfied and
discharged to the extent such amount is so paid by such purchasers.  If such an
agreement is entered into, any Securities not duly surrendered for conversion by
the Holders thereof may, at the option of the Company, be deemed, to the fullest
extent permitted by law, acquired by such purchasers from such Holders and
(notwithstanding anything to the contrary contained in Article 11) surrendered
by such purchasers for conversion, all as of immediately prior to the close of
business on the Redemption Date, subject to payment of the above amount as
aforesaid.  The


                                      -16-


Paying Agent shall hold and pay to the Holders whose Securities are selected for
redemption any such amount paid to it for purchase and conversion in the same
manner as it would moneys deposited with it by the Company for the redemption of
Securities.  Without the Paying Agent's prior written consent, no arrangement
between the Company and such purchasers for the purchase and conversion of any
Securities shall increase or otherwise affect any of the powers, duties,
responsibilities or obligations of the Paying Agent as set forth in this
Indenture, and the Company agrees to indemnify the Paying Agent from, and hold
it harmless against, any loss, liability or expense arising out of or in
connection with any such arrangement for the purchase and conversion of any
Securities between the Company and such purchasers, including the costs and
expenses incurred by the Paying Agent in the defense of any claim or liability
arising out of or in connection with the exercise or performance of any of its
powers, duties, responsibilities or obligations under this Indenture.

          SECTION 3.08.  PURCHASE OF SECURITIES AT OPTION OF THE HOLDER.

          (a)  GENERAL.  Securities shall be purchased by the Company pursuant
to paragraph 6 of the Securities (x) as of __________ __, 2000 (the "PURCHASE
DATE") and (y) at the election of the Company exercised in accordance with the
terms of Section 3.08(e), as of _________ __, 2005 (the "OPTIONAL PURCHASE
DATE"), at the purchase price specified therein (each, a "PURCHASE PRICE"), at
the option of the Holder thereof, upon:

         (1) delivery to the Paying Agent, by the Holder, of a written notice of
     purchase (a "PURCHASE NOTICE") at any time from the opening of business on
     the date that is 20 Business Days prior to such Purchase Date or Optional
     Purchase Date, if applicable, until the close of business on such Purchase
     Date or Optional Purchase Date stating:

               (A)  the certificate number of the Security which the Holder will
          deliver to be purchased,

               (B)  the portion of the Principal Amount at Maturity of the
          Security which the Holder will deliver to be purchased, which portion
          must be $1,000 or an integral multiple thereof,

               (C)  that such Security shall be purchased as of the Purchase
          Date or Optional Purchase Date, as applicable, pursuant to the terms
          and conditions specified in paragraph 6 of the Securities and in this
          Indenture, and


                                      -17-


               (D)  in the event the Company elects, pursuant to Section
          3.08(b), to pay the Purchase Price to be paid as of the Purchase Date
          or Optional Purchase Date, as applicable, in whole or in part, in
          Common Shares and/or the specified TDS Common Equity Securities but
          such Purchase Price (or portion(s) thereof) shall ultimately be
          payable to such Holder entirely in cash because any of the conditions
          to payment of the Purchase Price (or such portion(s) thereof) in
          Common Shares and/or such specified TDS Common Equity Securities is
          not satisfied prior to the close of business on such Purchase Date or
          Optional Purchase Date, as set forth in Section 3.08(d), whether such
          Holder elects (i) to withdraw such Purchase Notice as to some or all
          of the Securities to which such Purchase Notice relates (stating the
          Principal Amount at Maturity and certificate numbers of the Securities
          as to which such withdrawal shall relate), or (ii) to receive cash in
          respect of the entire Purchase Price (or such portions(s) thereof) for
          all Securities (or portions thereof) to which such Purchase Notice
          relates; and

         (2) delivery of such Security to the Paying Agent prior to, on or after
     the Purchase Date or Optional Purchase Date, as applicable (together with
     all necessary endorsements), at the offices of the Paying Agent, such
     delivery being a condition to receipt by the Holder of the Purchase Price
     therefor; PROVIDED, HOWEVER, that such Purchase Price shall be so paid
     pursuant to this Section 3.08 only if the Security so delivered to the
     Paying Agent shall conform in all respects to the description thereof in
     the related Purchase Notice.

          Unless a Holder, in such Holder's Purchase Notice or in any written
notice of withdrawal delivered by such Holder pursuant to the terms of Section
3.10, indicates such Holder's choice with respect to the election set forth in
clause (D) of Section 3.08(a)(1) as it relates to the applicable portion(s) of
such Purchase Price, such Holder shall be deemed to have elected to receive cash
in respect of the Purchase Price (or such applicable portion(s) thereof) for all
Securities subject to such Purchase Notice in the circumstances set forth in
such clause (D).

          The Company shall purchase from the Holder thereof, pursuant to this
Section 3.08, a portion of a Security if the Principal Amount at Maturity of
such portion is $1,000 or an integral multiple of $1,000.  Provisions of this
Indenture that apply to the purchase of all of a Security also apply to the
purchase of such portion of such Security.


                                      -18-


          Any purchase by the Company contemplated pursuant to the provisions of
this Section 3.08 shall be consummated by the delivery of the consideration to
be received by the Holder promptly following the later of the Purchase Date or
Optional Purchase Date, as applicable, and the time of delivery of the Security.

          Notwithstanding anything herein to the contrary, any Holder delivering
to the Paying Agent the Purchase Notice contemplated by this Section 3.08(a)
shall have the right to withdraw such Purchase Notice at any time prior to the
close of business on the Purchase Date or Optional Purchase Date, as applicable,
by delivery of a written notice of withdrawal to the Paying Agent in accordance
with Section 3.10.

          The Paying Agent shall promptly notify the Company of the receipt by
it of any Purchase Notice or written notice of withdrawal thereof.

          (b)  COMPANY'S RIGHT TO ELECT MANNER OF PAYMENT OF PURCHASE PRICE.
The Securities to be purchased pursuant to Section 3.08(a) may be paid for, at
the election of the Company, in cash, Common Shares or specified TDS Common
Equity Securities, or in any combination of cash, Common Shares and specified
TDS Common Equity Securities, subject to the conditions set forth in Sections
3.08(c) and (d).  The Company shall designate, in the Company Notice delivered
pursuant to Section 3.08(e), whether the Company will purchase the Securities
for cash, Common Shares or any TDS Common Equity Securities (specifying which
TDS Common Equity Securities (the TDS Common Equity Securities so specified are
referred to herein as "specified TDS Common Equity Securities")), or, if a
combination thereof, the percentages of the Purchase Price of Securities in
respect of which it will pay in cash, Common Shares or the specified TDS Common
Equity Securities; PROVIDED that the Company will pay cash for fractional Common
Shares or TDS Common Equity Securities.  For purposes of determining the
existence of potential fractional interests, all Securities subject to purchase
by the Company held by a Holder shall be considered together (no matter how many
separate certificates are to be presented).  Each Holder whose Securities are
purchased pursuant to this Section 3.08 shall receive the same percentage of
cash, Common Shares or the specified TDS Common Equity Securities in payment of
the Purchase Price for such Securities, except (i) as provided in Section
3.08(d) with regard to the payment of cash in lieu of fractional Common Shares
and TDS Common Equity Securities and (ii) in the event that the Company is
unable to purchase the Securities of a Holder or Holders for Common Shares or
the specified TDS Common Equity Securities because any necessary qualifications
or registrations of the Common Shares or the specified TDS Common Equity
Securities under applicable state securities laws cannot be obtained, the
Company may purchase the Securities of such


                                      -19-


Holder or Holders for cash.  The Company may not change its election with
respect to the consideration (or components or percentages of components
thereof) to be paid once the Company has given its Company Notice to
Securityholders except pursuant to this Section 3.08(b) or pursuant to Section
3.08(d) in the event of a failure to satisfy, prior to the close of business on
the Purchase Date or Optional Purchase Date, as applicable, any condition to the
payment of the Purchase Price, in whole or in part, in Common Shares or the
specified TDS Common Equity Securities.

          At least three Business Days before the Company Notice Date, the
Company shall deliver an Officers' Certificate to the Trustee specifying:

          (i)  the manner of payment selected by the Company,

         (ii)  the information required by Section 3.08(e),

        (iii)  if the Company elects to pay the Purchase Price, or a specified
     percentage thereof, in Common Shares and/or specified TDS Common Equity
     Securities, that the conditions to such manner of payment set forth in
     Section 3.08(d) have been or will be complied with, and

         (iv)  whether the Company desires the Trustee to give the Company
     Notice required by Section 3.08(e).

          (c)  PURCHASE WITH CASH.  As of the Purchase Date or the Optional
Purchase Date, as applicable, at the option of the Company, the Purchase Price
of Securities in respect of which a Purchase Notice pursuant to Section 3.08(a)
has been given, or a specified percentage thereof, may be paid by the Company
with cash equal to the aggregate Purchase Price, or such specified percentage
thereof, as the case may be, of such Securities.  If the Company elects to
purchase Securities with cash, the Company Notice, as provided in Section
3.08(e), shall be sent to Holders (and to beneficial owners as required by
applicable law) not less than 20 Business Days prior to such Purchase Date or
Optional Purchase Date, as applicable (the "COMPANY NOTICE DATE").

          (d)  PAYMENT WITH COMMON SHARES AND/OR TDS COMMON EQUITY SECURITIES.
As of the Purchase Date or the Optional Purchase Date, as applicable, at the
option of the Company, the Purchase Price of Securities in respect of which a
Purchase Notice pursuant to Section 3.08(a) has been given, or a specified
percentage thereof, may be paid by the Company with a number of Common Shares
and/or shares of the specified TDS Common Equity Securities equal to the
quotient obtained by dividing (i) the amount of cash to which the
Securityholders would have been entitled had the Company elected to pay all or
such specified percentage, as the case may be, of the Purchase Price of such


                                      -20-


Securities in cash by (ii) the Market Price of a Common Share (in the case of
payment with Common Shares) or a share of such specified TDS Common Equity
Securities (in the case of payment with such specified TDS Common Equity
Securities), subject to the next succeeding paragraph.

          The Company will not issue fractional Common Shares or fractional
shares of TDS Common Equity Securities in payment of the Purchase Price or the
Optional Purchase Price, if applicable.  Instead the Company will pay cash for
the current market value of the fractional share.  The current market value of a
fractional Common Share or a fractional share of the specified TDS Common Equity
Security shall be determined by multiplying the applicable Market Price by such
fraction and rounding the product to the nearest whole cent.  It is understood
that if a Holder elects to have more than one Security purchased, the number of
Common Shares or specified TDS Common Equity Securities shall be based on the
aggregate amount of Securities to be purchased.

          If the Company elects to purchase the Securities with Common Shares
and/or specified TDS Common Equity Securities, the Company Notice, as provided
in Section 3.08(e), shall be sent to the Holders (and to beneficial owners as
required by applicable law) not later than the Company Notice Date.

          The Company's right to exercise its election to purchase the
Securities pursuant to Section 3.08 with Common Shares and/or specified TDS
Common Equity Securities shall be conditioned upon:

            (i)  the Company not having given its Company Notice of an election
     to pay entirely in cash and its giving of timely Company Notice of election
     to purchase all or a specified percentage of the Securities with Common
     Shares and/or the specified TDS Common Equity Securities as provided
     herein;

           (ii)  the registration of the Common Shares and/or the specified TDS
     Common Equity Securities to be used in respect of the payment of the
     specified percentage of the Purchase Price under the Securities Act of
     1933, as amended (the "SECURITIES ACT"), and the Securities Exchange Act of
     1934, as amended (the "EXCHANGE ACT"), in each case, if required for the
     initial issuance thereof;

          (iii)  any necessary qualification or registration under applicable
     state securities laws or the availability of an exemption from such
     qualification and registration; and

          (iv)  in the event the Company intends to elect to pay the Purchase
     Price (or a specified percentage thereof) with


                                      -21-


     specified TDS Common Equity Securities, prior to sending its Company Notice
     indicating such election, the Company and TDS shall have entered into a
     duly authorized, validly executed, valid and binding agreement relating to
     the acquisition of such specified TDS Common Equity Securities on terms
     permitting the Company to deliver such specified TDS Common Equity
     Securities in payment of such Purchase Price (or such specified percentage
     thereof) (A) in accordance with the terms of this Section 3.08, including
     provisions for (x) any required registration of such specified TDS Common
     Equity Securities under the Securities Act or the Exchange Act, (y) any
     required registration or qualification of such specified TDS Common Equity
     Securities under applicable state securities laws or for the perfection of
     the availability of an exemption therefrom and (z) the listing or admission
     to quotation of such specified TDS Common Equity Securities as required by
     the terms of this Section 3.08), and (B) such that such specified TDS
     Common Equity Securities are duly authorized, validly issued, fully paid,
     nonassessable, free of any lien, other encumbrance or adverse claim and not
     subject to or in violation of any preemptive or similar rights.

           (v)  the receipt by the Trustee of an Officers' Certificate and an
     Opinion of Counsel each stating that (A) the terms of the issuance of the
     Common Shares and/or the specified TDS Common Equity Securities, as
     applicable, are in conformity with this Indenture and (B) the Common Shares
     and/or the specified TDS Common Equity Securities to be used by the Company
     in payment of the specified percentage of the Purchase Price in respect of
     Securities have been duly authorized and, when issued and delivered
     pursuant to the terms of this Indenture in payment of such specified
     percentage of the Purchase Price in respect of the Securities, will be
     validly issued, fully paid and non-assessable and, to the best of such
     counsel's knowledge, free from preemptive rights, and, in the case of such
     Officer's Certificate, stating that conditions (i), (ii), (iii) and (iv)
     above and the condition set forth in the succeeding sentence have been
     satisfied and, in the case of such Opinion of Counsel, stating that
     conditions (ii), (iii) and (iv) above have been satisfied.

The Company may pay the Purchase Price (or any portion thereof) in Common Shares
and/or specified TDS Common Equity Securities only if the information necessary
to calculate the Market Price of a Common Share (in the case of payment with
Common Shares) or a share of the specified TDS Common Equity Securities (in the
case of payment with such TDS Common Equity Securities) is published in a daily
newspaper of national circulation and only if the Common Shares and/or the
specified TDS Common Equity Securities, as applicable, are listed or admitted to
trading on a


                                      -22-


United States national or regional securities exchange or reported by The Nasdaq
Stock Market.  If the foregoing conditions are not satisfied with respect to a
Holder or Holders prior to the close of business on the Purchase Date or
Optional Purchase Date, as applicable, and the Company has elected to purchase
the Securities pursuant to this Section 3.08 with Common Shares and/or specified
TDS Common Equity Securities, the Company shall pay that portion of the Purchase
Price of the Securities of such Holder or Holders that would have been paid in
Common Shares and/or specified TDS Common Equity Securities (whichever in
respect of which such condition has not been met) in cash.  On the Business Day
following the Purchase Date or Optional Purchase Date, as applicable, the
Company shall deliver to the Trustee an Officers' Certificate setting forth the
number of Common Shares and/or the specified TDS Common Equity Securities, to be
paid for each $1,000 Principal Amount at Maturity of Securities and the Sale
Price of a Common Share and/or a share of the specified TDS Common Equity
Securities, as applicable, on each trading day during the period commencing on
the first trading day of the period during which the Market Price is calculated
and ending on the Purchase Date or Optional Purchase Date, as applicable.

          The "MARKET PRICE" means the average of the Sale Prices of the Common
Shares or the specified TDS Common Equity Securities, as applicable, for the
five trading day period ending on (if the third Business Day prior to the
applicable Purchase Date or Optional Purchase Date, as applicable, is a trading
day, or if not, then on the last trading day prior to) the third Business Day
prior to the Purchase Date or Optional Purchase Date, as applicable,
appropriately adjusted to take into account the occurrence, during the period
commencing on the first of such trading days during such five trading day period
and ending on such Purchase Date or Optional Purchase Date, of (i) in the case
of Common Shares, any event described in Section 11.06, 11.07 or 11.08; subject,
however, to the conditions set forth in Sections 11.09 and 11.10 or (ii) in the
case of the specified TDS Common Equity Securities, any event described in the
preceding clause (i), subject to the conditions described in the preceding
clause (i), as if such Sections 11.06, 11.07, 11.08, 11.09 and 11.10 had been
made applicable to the specified TDS Common Equity Securities, MUTATIS MUTANDIS.

          The "SALE PRICE" of the Common Shares or the specified TDS Common
Equity Securities, as applicable, on any date means the closing per share sale
price (or, if no closing sale price is reported, the average of the bid and ask
prices or, if more than one in either case, the average of the average bid and
average ask prices) on such date as reported in the composite transactions for
the principal United States securities exchange on which the Common Shares or
the specified TDS Common Equity Securities, as applicable, are traded or, if the
Common Shares or the specified TDS Common Equity Securities, as applicable, are


                                      -23-


not listed on a United States national or regional securities exchange, as
reported on The Nasdaq Stock Market.

          (e)  NOTICE OF ELECTION.  The Company's notice of election to purchase
with cash, Common Shares or specified TDS Common Equity Securities or any
combination thereof shall be sent to the Holders (and to beneficial owners as
required by applicable law) in the manner provided in Section 12.02 at the time
specified in Section 3.08(c) or (d), as applicable (the "COMPANY NOTICE").  Such
Company Notice shall state the manner of payment elected, as set forth in
Section 3.08(b), and shall contain the following information:

          In the event the Company has elected to pay the Purchase Price (or a
specified percentage thereof) with Common Shares and/or specified TDS Common
Equity Securities, the Company Notice shall:

          (1)  state that each Holder will receive Common Shares and/or the
     specified TDS Common Equity Securities, as applicable, with a Market Price
     determined as of a specified date prior to the Purchase Date or Optional
     Purchase Date, as applicable, equal to such specified percentage of the
     Purchase Price of the Securities held by such Holder (except any cash
     amount to be paid in lieu of fractional Common Shares and/or TDS Common
     Equity Securities);

          (2)  set forth the method of calculating the Market Price of the
     Common Shares and/or the specified TDS Common Equity Securities; and

          (3)  state that because the Market Price of the Common Shares and/or
     the specified TDS Common Equity Securities will be determined prior to the
     Purchase Date or Optional Purchase Date, as applicable, Holders will bear
     the market risk with respect to the value of the Common Shares and/or the
     specified TDS Common Equity Securities to be received from the date such
     Market Price is determined to the Purchase Date or Optional Purchase Date,
     as applicable.

          In any case, each Company Notice shall include a form of Purchase
Notice to be completed by a Securityholder and shall state:

          (i)  the Purchase Price and the Conversion Rate;

         (ii)  the name and address of the Paying Agent and the Conversion
     Agent;

        (iii)  that Securities as to which a Purchase Notice has been given may
     be converted pursuant to Article 11 hereof


                                      -24-


     only if the applicable Purchase Notice has been withdrawn in accordance
     with the terms of this Indenture;

         (iv)  that Securities must be surrendered to the Paying Agent to
     collect payment;

          (v)  that the Purchase Price for any Security as to which a Purchase
     Notice has been given and not withdrawn will be paid promptly following the
     later of the Purchase Date or Optional Purchase Date, as applicable, and
     the time of surrender of such Security as described in (iv);

         (vi)  the procedures the Holder must follow to exercise rights under
     Section 3.08 and a brief description of those rights;

        (vii)  briefly, the conversion rights of the Securities; and

       (viii)  the procedures for withdrawing a Purchase Notice (including,
     without limitation, for a conditional withdrawal pursuant to the terms of
     Section 3.08(a)(1)(D) or Section 3.10).

          The Company Notice in respect of the Purchase Date shall state whether
or not the Company is electing to become obligated to purchase Securities, at
the option of the Holder thereof, on the Optional Purchase Date.

          At the Company's request set forth in the Officers' Certificate
delivered to the Trustee pursuant to Section 3.08(b)(iv), the Trustee shall give
such Company Notice in the Company's name and at the Company's expense;
PROVIDED, HOWEVER, that, in all cases, the text of such Company Notice shall be
prepared by the Company.

          Notwithstanding anything to the contrary contained in this Section
3.08, the Company shall not be obligated to send notice of its election to pay
the Purchase Price with cash, Common Shares and/or specified TDS Common Equity
Securities or a combination thereof if (i) prior to the Company Notice Date in
respect of the Purchase Date, the Company has mailed a notice of redemption in
respect of all outstanding Securities in accordance with Section 3.03 and the
Redemption Date specified in such notice of redemption is the Purchase Date or
(ii) prior to the Company Notice Date in respect of the Optional Purchase Date,
if applicable, the Company has mailed a notice of redemption in respect of all
outstanding Securities in accordance with Section 3.03 and the Redemption Date
specified in such notice of redemption is on or prior to such Optional Purchase
Date.  Any such notice of redemption shall further state that as a result of the
giving of such notice the Company will not be obligated to


                                      -25-


give the notice of its election in respect of the Purchase Date or the Optional
Purchase Date, as applicable.

          Upon determination of the actual number of Common Shares and/or of
shares of the specified TDS Common Equity Securities to be issued for each
$1,000 Principal Amount at Maturity of Securities, the Company will publish such
determination in a daily newspaper of national circulation.

          (f)  COVENANTS OF THE COMPANY.  All Common Shares delivered upon
purchase of Securities shall be newly issued shares or treasury shares, shall be
fully paid and nonassessable and shall be free from preemptive rights and free
of any lien or adverse claim.

          The Company shall use its best efforts to list or cause to have quoted
any Common Shares to be issued to purchase Securities on each national
securities exchange or over-the-counter or other domestic market on which the
Common Shares are then listed or quoted.

          All TDS Common Equity Securities delivered by the Company upon
purchase of Securities shall be, to the best of the Company's knowledge, duly
authorized, validly issued, fully paid and nonassessable, free of any lien,
other encumbrance or adverse claim and not subject to nor in violation of any
preemptive or similar rights.

          The Company shall use its best efforts to cause TDS to list or cause
to have quoted any TDS Common Equity Securities to be used by the Company to
purchase Securities on each national securities exchange or over-the-counter or
other domestic market on which such TDS Common Equity Securities are then listed
or quoted.

          (g)  PROCEDURE UPON PURCHASE.  The Company shall deposit cash (in
respect of a cash purchase under Section 3.08(c) or for fractional interests, as
applicable), Common Shares or the specified TDS Common Equity Securities, or a
combination thereof, as applicable, at the time and in the manner as provided in
Section 3.11, sufficient to pay the aggregate Purchase Price of all Securities
to be purchased pursuant to this Section 3.08.  As soon as practicable after the
Purchase Date or Optional Purchase Date, as applicable, the Company shall
deliver to each Holder entitled to receive Common Shares and/or specified TDS
Common Equity Securities through the Paying Agent, a certificate (or
certificates in the case of payment of both Common Shares and specified TDS
Common Equity Securities) for the number of Common Shares and/or specified TDS
Common Equity Securities payable in payment of the Purchase Price and cash in
lieu of any fractional Common Shares or TDS Common Equity Securities.  The
person in whose name the certificate or certificates for Common Shares


                                      -26-


and/or specified TDS Common Equity Securities is registered shall be treated as
a holder of record of such Common Shares and/or specified TDS Common Equity
Securities on the Business Day following the Purchase Date or Optional Purchase
Date, as applicable.  Subject to Section 3.08(d), no payment or adjustment will
be made for dividends or other distributions on the Common Shares and/or the
specified TDS Common Equity Securities the record date for which occurred on or
prior to the Purchase Date or Optional Purchase Date, as applicable.

          (h)  TAXES.  If a Holder of a Security is paid in Common Shares and/or
TDS Common Equity Securities, the Company shall pay any documentary, stamp or
similar issue or transfer tax due on such payment of Common Shares and/or TDS
Common Equity Securities.  However, the Holder shall pay any such tax which is
due because the Holder requests the Common Shares and/or TDS Common Equity
Securities to be issued in a name other than the Holder's name.  The Paying
Agent may refuse to deliver the certificates representing the Common Shares
and/or TDS Common Equity Securities being issued in a name other than the
Holder's name until the Paying Agent receives a sum sufficient to pay any tax
which will be due because the Common Shares and/or TDS Common Equity Securities
are to be issued in a name other than the Holder's name.  Nothing herein shall
preclude any income tax withholding required by law or regulations.

          SECTION 3.09.  PURCHASE OF SECURITIES AT OPTION OF THE HOLDER UPON
CHANGE IN CONTROL.  (a)  If on or prior to              , 2000 there shall have
occurred a Change in Control, Securities shall be purchased by the Company, at
the option of the Holder thereof, at the purchase price specified in paragraph 6
of the Securities (the "CHANGE IN CONTROL PURCHASE PRICE"), as of the date that
is 35 Business Days after the occurrence of the Change in Control (the "CHANGE
IN CONTROL PURCHASE DATE"), subject to satisfaction by or on behalf of the
Holder of the requirements set forth in Section 3.09(c).

     A "CHANGE IN CONTROL" shall be deemed to have occurred at such time as any
of the following events shall occur:

         (i)  There is a report filed on Schedule 13D or 14D-1 (or any successor
     schedule, form or report) pursuant to the Exchange Act, disclosing that any
     person (for the purposes of this Section 3.09 only, as the term "PERSON" is
     used in Section 13(d)(3) or Section 14(d)(2) of the Exchange Act) has
     become the beneficial owner (for purposes of this Section 3.09, as the term
     "BENEFICIAL OWNER" is defined under Rule 13d-3 or any successor rule or
     regulation promulgated under the Exchange Act) of 50% or more of the
     combined voting power of all of the Company's then outstanding equity
     securities (of all classes or series) or such other Capital Stock of the
     Company into which such


                                      -27-


     equity securities are reclassified or changed; PROVIDED, HOWEVER, that a
     person shall not be deemed beneficial owner of, or to own beneficially, (A)
     any securities tendered pursuant to a tender or exchange offer made by or
     on behalf of such person or any of such person's Affiliates or Associates
     until such tendered securities are accepted for purchase or exchange
     thereunder, or (B) any securities if such beneficial ownership (1) arises
     solely as a result of a revocable proxy delivered in response to a proxy or
     consent solicitation made pursuant to the applicable rules and regulations
     under the Exchange Act, and (2) is not also then reportable on Schedule 13D
     (or any successor schedule) under the Exchange Act;

          (ii) the number of outstanding Common Shares (or such other class or
     series of Capital Stock of the Company into which the Common Shares are
     reclassified or changed) the beneficial owners of which are not Affiliates
     of the Company is at any time reduced to less than ten million (such number
     to be appropriately adjusted to reflect the impact of any transaction of
     the type described in Section 11.06(1), (2) or (3), including in connection
     with any such reclassification or change) as a result of acquisitions of
     Common Shares (or such other Capital Stock) by, or in concert with, (A) the
     Company, (B) TDS, (C) any of their Subsidiaries, Affiliates, employee stock
     ownership plans or employee benefit plans or (D) LeRoy T. Carlson, his
     family members (meaning his spouse, siblings and lineal descendants),
     estate and heirs and any trust or other investment vehicle for the primary
     benefit of any of such persons or their respective family members or heirs
     (collectively, the "CARLSON FAMILY").

          (iii)  There shall be consummated any consolidation or merger of the
     Company (A) in which the Company is not the continuing or surviving
     corporation or (B) pursuant to which the Common Shares would be converted
     into cash, securities or other property, in each case other than a
     consolidation or merger of the Company in which the holders of the Common
     Shares and Series A Common Shares immediately prior to the consolidation or
     merger have, directly or indirectly, 50% or more of the combined voting
     power of the common equity securities of the continuing or surviving
     corporation immediately after such consolidation or merger; or

          (iv) TDS and its Subsidiaries cease to collectively be beneficial
     owners of at least 50% of (A) the total of the Common Shares and Series A
     Common Shares (or such other classes or series of Capital Stock of the
     Company into which such Common Shares or Series A Common Shares are
     reclassified or changed) then outstanding or (B) the combined voting power
     of all of the Company's then


                                      -28-


     outstanding equity securities (of all classes or series) or such other
     Capital Stock of the Company into which such equity securities are
     reclassified or changed (treating any Common Shares held by the custodian
     pursuant to the Custodian Agreement (the "CUSTODIAN AGREEMENT"), dated
     ______ __, 1995, between TDS and Harris Trust and Savings Bank, as
     custodian, and any Common Shares lent pursuant to the Securities Loan
     Agreement (the "SECURITIES LOAN AGREEMENT"), dated _______ __, 1995,
     between Merrill Lynch, Pierce, Fenner & Smith Incorporated and TDS, or any
     successor agreement or agreements entered into by TDS with substantially
     similar terms, as being beneficially owned by TDS for purposes of (A) or
     (B) above) (the event or transaction giving rise to such circumstances
     described in (A) or (B) above being referred to as the "Designated
     Transaction") and, in either case (A) or (B), there shall occur a Rating
     Decline within the time period described below in the definition of "Rating
     Decline" and with a Reference Date occurring on or prior to              ,
     2000.

Notwithstanding the foregoing provisions of this Section 3.09, except as
described in clauses (ii), (iii) or (iv) of the above definition of Change in
Control, a Change in Control shall not be deemed to have occurred by virtue of
(A) TDS, (B) the Company, (C) their subsidiaries, (D) their employee stock
ownership plans or any of their other employee benefit plans, (E) the Carlson
Family or (F) any person holding any of the Company's outstanding equity
securities (of all classes or series) or other Capital Stock of the Company into
which such equity securities are reclassified or changed for or pursuant to the
terms of any such employee benefit plan, in any such case, filing or becoming
obligated to file a report under or in response to Schedule 13D or Schedule
14D-1 (or any successor schedule, form or report) under the Exchange Act
disclosing beneficial ownership by it of any of the Company's outstanding equity
securities (of any or all classes or series) or such other Capital Stock of the
Company into which such equity securities are reclassified or changed, whether
in excess of 50% or otherwise.

          "ASSOCIATE" shall have the meaning ascribed to such term in Rule 12b-2
of the General Rules and Regulations under the Exchange Act, as in effect on the
date hereof.

     A "Rating Decline" will be deemed to have occurred if, on any date within
the period (the "Rating Period") beginning on the date (the "Reference Date") of
the earlier to occur of (a) the first public announcement by TDS, the Company or
any other person of an intention to effect the Designated Transaction and (b)
the occurrence of such Designated Transaction and ending on the date that is 60
days after the later to occur of (A) the occurrence of such Designated
Transaction and (B) the first public announcement by TDS, the Company or any
other person of the occurrence of such


                                      -29-


Designated Transaction, either of the following events has occurred: (i) the
Securities shall be rated by any Rating Agency at any time during the Rating
Period at a rating which is lower than the rating of the Securities by such
Rating Agency on the Rating Date by more than one gradation (including
gradations within Rating Categories as well as between Rating Categories) or
(ii) any Rating Agency shall have withdrawn its rating of the Securities during
the Rating Period.

     "Rating Agency" means Standard & Poor's Corporation and its successors
("S&P"), and Moody's Investors Service, Inc. and its successors ("Moody's"), or,
if S&P or Moody's, or both, shall not make a rating of the Securities publicly
available, a nationally recognized United States statistical rating agency or
agencies, substituted by the Company, with written notice to the Trustee, for
S&P or Moody's, or both, as the case may be.

     "Rating Category" means each major rating category symbolized by (x) in the
case of S&P, AAA, AA, A, BBB, BB, B, CCC, CC and C and each such Rating Category
shall include pluses or minuses ("gradations") modifying such capital letters;
(y) in the case of Moody's, Aaa, Aa, A, Baa, Ba, B, Caa, Ca and C and each such
Rating Category shall include added numerals such as 1, 2 or 3 ("gradations")
modifying such letters; and (z) with respect to any other Rating Agency,
comparable or equivalent symbols.  "Rating Date" is defined as the date that is
60 days prior to the Reference Date.

          (b)  Within 15 Business Days after the occurrence of a Change in
Control, the Company shall mail a written notice of Change in Control by
first-class mail to the Trustee and to each Holder (and to beneficial owners as
required by applicable law) and shall cause a copy of such notice to be
published in a daily newspaper of national circulation.  The notice shall
include a form of Change in Control Purchase Notice to be completed by the
Securityholder and shall state:

          (1)  briefly, the events causing a Change in Control and the date of
     such Change in Control;

          (2)  the date by which the Change in Control Purchase Notice pursuant
     to this Section 3.09 must be given;

          (3)  the Change in Control Purchase Date;

          (4)  the Change in Control Purchase Price;

          (5)  the name and address of the Paying Agent and the Conversion
     Agent;

          (6)  the Conversion Rate and any adjustments thereto;


                                      -30-


          (7)  that Securities as to which a Change in Control Purchase Notice
     has been given may be converted pursuant to Article 11 hereof only if the
     Change in Control Purchase Notice has been withdrawn in accordance with the
     terms of this Indenture;

          (8)  that Securities must be surrendered to the Paying Agent to
     collect payment;

          (9)  that the Change in Control Purchase Price for any Security as to
     which a Change in Control Purchase Notice has been duly given and not
     withdrawn will be paid promptly following the later of the Change in
     Control Purchase Date and the time of surrender of such security as
     described in (8);

          (10)  briefly, the procedures the Holder must follow to exercise
     rights under this Section 3.09;

          (11)  briefly, the conversion rights of the Securities; and

          (12)  the procedures for withdrawing a Change in Control Purchase
     Notice.

          (c)  A Holder may exercise its rights specified in Section 3.09(a)
upon delivery of a written notice of purchase (a "CHANGE IN CONTROL PURCHASE
NOTICE") to the Paying Agent at any time prior to the close of business on the
Change in Control Purchase Date, stating:

          (1)  the certificate number of the Security which the Holder will
     deliver to be purchased;

          (2)  the portion of the Principal Amount at Maturity of the Security
     which the Holder will deliver to be purchased, which portion must be $1,000
     or an integral multiple thereof; and

          (3)  that such Security shall be purchased pursuant to the terms and
     conditions specified in paragraph 6 of the Securities.

          The delivery of such Security to the Paying Agent prior to, on or
after the Change in Control Purchase Date (together with all necessary
endorsements) at the offices of the Paying Agent shall be a condition to the
receipt by the Holder of the Change in Control Purchase Price therefor;
PROVIDED, HOWEVER, that such Change in Control Purchase Price shall be so paid
pursuant to this Section 3.09 only if the Security so delivered to the Paying
Agent shall conform in all respects to the


                                      -31-


description thereof set forth in the related Change in Control Purchase Notice.

          The Company shall purchase from the Holder thereof, pursuant to this
Section 3.09, a portion of a Security if the Principal Amount at Maturity of
such portion is $1,000 or an integral multiple of $1,000.  Provisions of this
Indenture that apply to the purchase of all of a Security also apply to the
purchase of such portion of such Security.

          Any purchase by the Company contemplated pursuant to the provisions of
this Section 3.09 shall be consummated by the delivery of the consideration to
be received by the Holder promptly following the later of the Change in Control
Purchase Date and the time of delivery of the Security to the Paying Agent in
accordance with this Section 3.09.

          Notwithstanding anything herein to the contrary, any Holder delivering
to the Paying Agent the Change in Control Purchase Notice contemplated by this
Section 3.09(c) shall have the right to withdraw such Change in Control Purchase
Notice at any time prior to the close of business on the Change in Control
Purchase Date by delivery of a written notice of withdrawal to the Paying Agent
in accordance with Section 3.10.

          The Paying Agent shall promptly notify the Company of the receipt by
it of any Change in Control Purchase Notice or written withdrawal thereof.

          SECTION 3.10.  EFFECT OF PURCHASE NOTICE OR CHANGE IN CONTROL PURCHASE
NOTICE.  Upon receipt by the Paying Agent of the Purchase Notice or Change in
Control Purchase Notice specified in Section 3.08(a) or Section 3.09(c), as
applicable, the Holder of the Security in respect of which such Purchase Notice
or Change in Control Purchase Notice, as the case may be, was given shall
(unless such Purchase Notice or Change in Control Purchase Notice is withdrawn
as specified in the following two paragraphs) thereafter be entitled to receive
solely the Purchase Price or Change in Control Purchase Price, as the case may
be, with respect to such Security.  Securities in respect of which a Purchase
Notice or Change in Control Purchase Notice, as the case may be, has been given
by the Holder thereof may not be converted pursuant to Article 11 hereof on or
after the date of the delivery of such Purchase Notice or Change in Control
Purchase Notice, as the case may be, unless such Purchase Notice or Change in
Control Purchase Notice, as the case may be, has first been validly withdrawn as
specified in the following two paragraphs.

          A Purchase Notice or Change in Control Purchase Notice, as the case
may be, may be withdrawn by means of a written notice of withdrawal delivered to
the office of the Paying Agent in accordance with the Purchase Notice or Change
in Control Purchase


                                      -32-


Notice, as the case may be, at any time prior to the close of business on the
Purchase Date, Optional Purchase Date, if applicable, or the Change in Control
Purchase Date, as the case may be, specifying:

          (1)  the certificate number of the Security in respect of which such
     notice of withdrawal is being submitted,

          (2)  the Principal Amount at Maturity of the Security with respect to
     which such notice of withdrawal is being submitted, and

          (3)  the Principal Amount at Maturity, if any, of such Security which
     remains subject to the original Purchase Notice or Change in Control
     Purchase Notice, as the case may be, and which has been or will be
     delivered for purchase by the Company.

          A written notice of withdrawal of a Purchase Notice may be in the form
set forth in the preceding paragraph or may be in the form of (i) a conditional
withdrawal contained in a Purchase Notice pursuant to the terms of Section
3.08(a)(1)(D) or (ii) a conditional withdrawal containing the information set
forth in Section 3.08(a)(1)(D) and the preceding paragraph and contained in a
written notice of withdrawal delivered to the Paying Agent as set forth in the
preceding paragraph.

          There shall be no purchase of any Securities pursuant to Section 3.08
(other than through the issuance of Common Shares and/or specified TDS Common
Equity Securities in payment of the Purchase Price, including cash in lieu of
fractional shares) thereof or 3.09 if there has occurred (prior to, on or after,
as the case may be, the giving, by the Holders of such Securities, of the
required Purchase Notice or Change in Control Purchase Notice, as the case may
be) and is continuing an Event of Default (other than a default in the payment
of the Purchase Price or Change in Control Purchase Price, as the case may be,
with respect to such Securities).  The Paying Agent will promptly return to the
respective Holders thereof any Securities (x) with respect to which a Purchase
Notice or Change in Control Purchase Notice, as the case may be, has been
withdrawn in compliance with this Indenture, or (y) held by it during the
continuance of an Event of Default (other than a default in the payment of the
Purchase Price or Change in Control Purchase Price, as the case may be, with
respect to such Securities) in which case, upon such return, the Purchase Notice
or Change in Control Purchase Notice with respect thereto shall be deemed to
have been withdrawn.

          SECTION 3.11.  DEPOSIT OF PURCHASE PRICE OR CHANGE IN CONTROL PURCHASE
PRICE.  Prior to 1:00 p.m. (local time in the City of New York) on the Business
Day following the Purchase Date, the Optional Purchase Date, as applicable, or
the Change in


                                      -33-


Control Purchase Date, as the case may be, the Company shall deposit with the
Trustee or with the Paying Agent (or, if the Company or a Subsidiary or an
Affiliate of either of them is acting as the Paying Agent, shall segregate and
hold in trust as provided in Section 2.04) an amount of cash (in immediately
available funds if deposited on such Business Day) or securities, if permitted
hereunder, sufficient to pay the aggregate Purchase Price or Change in Control
Purchase Price, as the case may be, of all the Securities or portions thereof
which are to be purchased as of the Purchase Date, Optional Purchase Date or
Change in Control Purchase Date, as the case may be.

          SECTION 3.12.  SECURITIES PURCHASED IN PART.  Any Security which is to
be purchased only in part shall be surrendered at the office of the Paying Agent
(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 Holder's attorney duly
authorized in writing) and the Company shall execute and the Trustee shall
authenticate and deliver to the Holder of such Security, without service charge,
a new Security or Securities, of any authorized denomination as requested by
such Holder in aggregate Principal Amount at Maturity equal to, and in exchange
for, the portion of the Principal Amount at Maturity of the Security so
surrendered which is not purchased.

          SECTION 3.13.  COVENANT TO COMPLY WITH SECURITIES LAWS UPON PURCHASE
OF SECURITIES.  In connection with any offer to purchase or purchase of
Securities under Section 3.08 or 3.09 hereof (provided that such offer or
purchase constitutes an "issuer tender offer" for purposes of Rule 13e-4 (which
term, as used herein, includes any successor provision thereto) under the
Exchange Act at the time of such offer or purchase), the Company shall (i)
comply with Rule 13e-4 and Rule 14e-1 under the Exchange Act, (ii) file the
related Schedule 13E-4 (or any successor schedule, form or report) under the
Exchange Act, and (iii) otherwise comply, and use its best efforts to cause TDS
to comply with respect to any TDS Common Equity Securities, with all Federal and
state securities laws so as to permit the rights and obligations under Sections
3.08 and 3.09 to be exercised in the time and in the manner specified in
Sections 3.08 and 3.09.

          SECTION 3.14.  REPAYMENT TO THE COMPANY.  The Trustee and the Paying
Agent shall return to the Company any cash, Common Shares or TDS Common Equity
Securities that remain unclaimed as provided in paragraph 13 of the Securities,
together with interest or dividends, if any, thereon (subject to the provisions
of Section 7.01(f)), held by them for the payment of the Purchase Price or
Change in Control Purchase Price, as the case may be; PROVIDED, HOWEVER, that to
the extent that the aggregate amount of cash, Common Shares or TDS Common Equity
Securities deposited


                                      -34-


by the Company pursuant to Section 3.11 exceeds the aggregate Purchase Price or
Change in Control Purchase Price, as the case may be, of the Securities or
portions thereof which the Company is obligated to purchase as of the Purchase
Date or Optional Purchase Date, as applicable, or Change in Control Purchase
Date, as the case may be, then promptly after the Business Day following the
Purchase Date or Optional Purchase Date, as applicable, or Change in Control
Purchase Date, as the case may be, the Trustee and the Paying Agent shall return
any such excess to the Company together with interest or dividends, if any,
thereon (subject to the provisions of Section 7.01(f)).


                                    ARTICLE 4

                                    COVENANTS

          SECTION 4.01.  PAYMENT OF SECURITIES.  The Company shall promptly make
all payments in respect of the Securities on the dates and in the manner
provided in the Securities or pursuant to this Indenture.  Principal Amount at
Maturity, Issue Price plus accrued Original Issue Discount, cash in respect of
conversion in accordance with Article 11, Redemption Price, Purchase Price,
Change in Control Purchase Price and interest, if any, shall be considered paid
on the applicable date due if on such date (or, in the case of a Purchase Price
or Change in Control Purchase Price, on the Business Day following the Purchase
Date or Optional Purchase Date, as applicable, or Change in Control Purchase
Date, as the case may be) the Trustee or the Paying Agent holds, in accordance
with this Indenture, money or, if permitted hereunder, securities sufficient to
pay all such amounts then due.

          The Company shall, to the extent permitted by law, pay interest on
overdue amounts at the rate per annum set forth in paragraph 1 of the
Securities, compounded semiannually, which interest shall accrue from the date
such overdue amount was originally due to the date payment of such amount,
including interest thereon, has been made or duly provided for.  All such
interest shall be payable on demand.  The accrual of such interest on overdue
amounts shall be in lieu of, and not in addition to, the continued accrual of
Original Issue Discount.

          SECTION 4.02.  SEC AND OTHER REPORTS.  The Company shall file with the
Trustee, within 15 days after it files such  with the SEC, copies of its annual
report and of the information, documents and other reports (or copies of such
portions of any of the foregoing as the SEC may by rules and regulations
prescribe) which the Company is required to file with the SEC pursuant to
Section 13 or 15(d) of the Exchange Act.  In the event the Company is at any
time no longer subject to the reporting requirements of Section 13 or 15(d) of
the Exchange Act, it shall


                                      -35-


continue to provide the Trustee with reports containing substantially the same
information as would have been required to be filed with the SEC had the Company
continued to have been subject to such reporting requirements.  In such event,
such reports shall be provided at the times the Company would have been required
to provide reports had it continued to have been subject to such reporting
requirements.  The Company also shall comply with the other provisions of TIA
Section 314(a).

          SECTION 4.03.  COMPLIANCE CERTIFICATE.  The Company shall deliver to
the Trustee within 120 days after the end of each fiscal year of the Company
(beginning with the fiscal year ending on December 31, 1995) an Officers'
Certificate stating whether or not to the knowledge of the signers thereof the
Company is in default in the performance and observance of any of the terms,
provisions, covenants or conditions of this Indenture (without regard to any
period of grace or requirement of notice provided hereunder) and if the Company
shall be in default, specifying all such defaults and the nature and status
thereof of which they may have knowledge.

          SECTION 4.04.  FURTHER INSTRUMENTS AND ACTS.  Upon request of the
Trustee, the Company will execute and deliver such further instruments and do
such further acts as may be reasonably necessary or proper to carry out more
effectively the purposes of this Indenture.

          SECTION 4.05.  MAINTENANCE OF OFFICE OR AGENCY.  The Company will
maintain in the Borough of Manhattan, the City of New York, an office or agency
of the Trustee, Registrar, Paying Agent and Conversion Agent where Securities
may be presented or surrendered for payment, where Securities may be surrendered
for registration of transfer, exchange, purchase, redemption or conversion and
where notices and demands to or upon the Company in respect of the Securities
and this Indenture may be served.  The office of the agent of the Trustee, at 77
Water Street, 4th Floor, New York, New York  10005, shall initially be such
office or agency for all of the aforesaid purposes.  The Company shall give
prompt written notice to the Trustee of the location, and of any change in the
location, of any such office or agency (other than a change in the location of
the office of the Trustee).  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 address of the Trustee set forth in Section 12.02.

          The Company may also from time to time designate one or more other
offices or agencies where the Securities may be presented or surrendered for any
or all such purposes and may from time to time rescind such designations;
PROVIDED, HOWEVER, that no such designation or rescission shall in any manner


                                      -36-


relieve the Company of its obligation to maintain an office or agency in the
Borough of Manhattan, the City of New York, for such purposes.

          The Company shall furnish to the Trustee on or before December 15 of
each year during which the Securities are outstanding, such information as may
be requested by the Trustee in order that the Trustee may prepare the
information which is required to be reported for such year on Internal Revenue
Service Forms 1096 and 1099 pursuant to section 6049 of the Internal Revenue
Code of 1986, as amended.  Such information shall include and the Company shall
provide the amount of Original Issue Discount includable in income for each
$1,000 of Principal Amount at Maturity of the Securities for the year in which
such information is required to be furnished to the Trustee.


                                    ARTICLE 5

                              SUCCESSOR CORPORATION

          SECTION 5.01.  WHEN COMPANY MAY MERGE OR TRANSFER ASSETS.  The Company
shall not consolidate with or merge with or into any other person or convey,
transfer or lease all or substantially all of its properties and assets to any
person, unless:

          (a)  either (1) the Company shall be the continuing corporation or (2)
     the person (if other than the Company) formed by such consolidation or into
     which the Company is merged or the person which acquires by conveyance,
     transfer or lease all or substantially all of the properties and assets of
     the Company (i) shall be a corporation, partnership or trust organized and
     validly existing under the laws of the United States or any State thereof
     or the District of Columbia and (ii) shall expressly assume, by an
     indenture supplemental hereto, executed and delivered to the Trustee, in
     form satisfactory to the Trustee, all of the obligations of the Company
     under the Securities and this Indenture;

          (b)  immediately after giving effect to such transaction, no Default
     shall have occurred and be continuing; and

          (c)  the Company 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 5 and that


                                      -37-


     all conditions precedent herein provided for relating to such transaction
     have been satisfied.

          For purposes of the foregoing, the transfer (by lease, assignment,
sale or otherwise) of all or substantially all of the properties and assets of
one or more Subsidiaries (other than to the Company or another Subsidiary),
which, if such properties and assets were owned by the Company, would constitute
a transfer of all or substantially all of the properties and assets of the
Company, shall be deemed to be the transfer of all or substantially all of the
properties and assets of the Company.

          The successor person formed by such consolidation or into which the
Company is merged or the successor person 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 had been named as the Company herein; and thereafter, except in
the case of (i) a lease of its properties and assets substantially as an
entirety and (ii) obligations the Company may have under a supplemental
indenture pursuant to Section 11.14, the Company shall be discharged from all
obligations and covenants under this Indenture and the Securities.  Subject to
Section 9.06, the Company, the Trustee and the successor person shall enter into
a supplemental indenture to evidence the succession and substitution of such
successor person and such discharge and release of the Company.


                                    ARTICLE 6

                              DEFAULTS AND REMEDIES

          SECTION 6.01.  EVENTS OF DEFAULT.  An "EVENT OF DEFAULT" occurs if:

          (1)  the Company defaults in the payment of the Principal Amount at
     Maturity, Issue Price plus accrued Original Issue Discount, Redemption
     Price, Purchase Price or Change in Control Purchase Price on any Security
     when the same becomes due and payable at its Stated Maturity, upon
     redemption, upon declaration, when due for purchase by the Company or
     otherwise, or defaults in the payment of cash in accordance with Article 11
     upon conversion of any Security, in all cases whether or not such payment
     shall be prohibited by Article 10;

          (2)  the Company fails to comply with any of its agreements in the
     Securities or this Indenture (other than those referred to in clause (1)
     above or clause (6) below) and such failure continues for 60 days after
     receipt by the Company of a Notice of Default;


                                      -38-


          (3)  a default shall occur under any bond, debenture, note or other
     evidence of indebtedness for money borrowed by the Company having an
     aggregate outstanding principal amount of in excess of $25,000,000, which
     default shall have resulted in such indebtedness becoming or being declared
     due and payable prior to the date on which it would otherwise have been due
     and payable, without such indebtedness having been discharged, such
     acceleration having been rescinded or annulled or there having been
     deposited in trust a sum of money sufficient to discharge in full such
     indebtedness, in each case within a period of 20 days after receipt by the
     Company of a Notice of Default;

          (4)  the Company pursuant to or under or within the meaning of any
     Bankruptcy Law:

               (A)  commences a voluntary case or proceeding;

               (B)  consents to the entry of an order for relief against it in
          an involuntary case or proceeding or the commencement of any case
          against it;

               (C)  consents to the appointment of a Custodian of it or for any
          substantial part of its property;

               (D)  makes a general assignment for the benefit of its creditors;

               (E)  files a petition in bankruptcy or answer or consent seeking
          reorganization or relief; or

               (F)  consents to the filing of such petition or the appointment
          of or taking possession by a Custodian;

          (5)  a court of competent jurisdiction enters an order or decree under
     any Bankruptcy Law that:

               (A)  is for relief against the Company in an involuntary case or
          proceeding, or adjudicates the Company insolvent or bankrupt;

               (B)  appoints a Custodian of the Company or for any substantial
          part of its property; or

               (C)  orders the winding up or liquidation of the Company;

     and the order or decree remains unstayed and in effect for 60 days; or

          (6)  The Company fails to deliver Common Shares (or cash in lieu of
     fractional Common Shares) when such Common


                                      -39-


     Shares (or cash in lieu of fractional Common Shares) are required to be
     delivered by the Company in accordance with Article 11 upon conversion of
     any Security (including a failure by the Company to deliver Common Shares
     in accordance with Article 11 following a failure by the Standby Share
     Deliverer to make a required delivery of Common Shares pursuant to a Common
     Share Delivery Arrangement) and such failure continues for 10 days.

          "BANKRUPTCY LAW" means Title 11, United States Code, or any similar
Federal or state law for the relief of debtors.

          "CUSTODIAN" means any receiver, trustee, assignee, liquidator,
custodian or similar official under any Bankruptcy Law.

          A Default under clause (2) or clause (3) above is not an Event of
Default until the Trustee notifies the Company, or the Holders of at least 25%
in aggregate Principal Amount at Maturity of the Securities at the time
outstanding notify the Company and the Trustee, of the Default and the Company
does not cure such Default (and such Default is not waived) within the time
specified in clause (2) or clause (3) above after actual receipt of such notice.
Any such notice must specify the Default, demand that it be remedied and state
that such notice is a "NOTICE OF DEFAULT".

          The Company shall deliver to the Trustee, within 30 days after it
becomes aware of the occurrence thereof, written notice of any event which with
the giving of notice or the lapse of time, or both, would become an Event of
Default under clause (2) or clause (3) above, its status and what action the
Company is taking or proposes to take with respect thereto.

          SECTION 6.02.  ACCELERATION.  If an Event of Default (other than an
Event of Default specified in Section 6.01(4) or (5)) occurs and is continuing,
the Trustee by notice to the Company, or the Holders of at least 25% in
aggregate Principal Amount at Maturity of the Securities at the time outstanding
by notice to the Company and the Trustee, may declare the Issue Price plus
accrued Original Issue Discount through the date of declaration on all the
Securities to be immediately due and payable.  Upon such a declaration, such
Issue Price plus accrued Original Issue Discount shall be due and payable
immediately.  If an Event of Default specified in Section 6.01(4) or (5) occurs
and is continuing, the Issue Price plus accrued Original Issue Discount on all
the Securities shall become and be immediately due and payable without any
declaration or other act on the part of the Trustee or any Securityholders.  The
Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding, by notice to the Trustee (and without notice
to any other Securityholder) may rescind an acceleration


                                      -40-


and its consequences if the rescission would not conflict with any judgment or
decree and if all existing Events of Default have been cured or waived except
nonpayment of the Issue Price plus accrued Original Issue Discount that have
become due solely as a result of acceleration and if all amounts due to the
Trustee under Section 7.07 have been paid.  No such rescission shall affect any
subsequent Default or impair any right consequent thereto.

          SECTION 6.03.  OTHER REMEDIES.  If an Event of Default occurs and is
continuing, the Trustee may pursue any available remedy to collect the payment
of the Issue Price plus accrued Original Issue Discount on the Securities or to
enforce the performance of any provision of the Securities or this Indenture.

          The Trustee may maintain a proceeding even if the Trustee does not
possess any of the Securities or does not produce any of the Securities in the
proceeding.  A delay or omission by the Trustee or any Securityholder in
exercising any right or remedy accruing upon an Event of Default shall not
impair the right or remedy or constitute a waiver of, or acquiescence in, the
Event of Default.  No remedy is exclusive of any other remedy.  All available
remedies are cumulative.

          SECTION 6.04.  WAIVER OF PAST DEFAULTS.  The Holders of a majority in
aggregate Principal Amount at Maturity of the Securities at the time
outstanding, by notice to the Trustee (and without notice to any other
Securityholder), may waive an existing Default and its consequences except
(a) an Event of Default described in Section 6.01(1) or (6) or (b) a Default in
respect of a provision that under Section 9.02 cannot be amended without the
consent of each Securityholder affected.  When a Default is waived, it is deemed
cured, but no such waiver shall extend to any subsequent or other Default or
impair any consequent right.  This Section 6.04 shall be in lieu of Section
316(a)1(B) of the TIA and such Section 316(a)1(B) is hereby expressly excluded
from this Indenture, as permitted by the TIA.

          SECTION 6.05.  CONTROL BY MAJORITY.  The Holders of a majority in
aggregate Principal Amount at Maturity of the Securities at the time outstanding
may direct the time, method and place of conducting any proceeding for any
remedy available to the Trustee or of exercising any trust or power conferred on
the Trustee.  However, the Trustee may refuse to follow any direction that
conflicts with law or this Indenture or that the Trustee determines in good
faith is unduly prejudicial to the rights of other Securityholders (it being
understood that the Trustee shall have no duty to ascertain whether or not such
actions or forbearances are unduly prejudicial to such holders) or would involve
the Trustee in personal liability.  The Trustee shall be entitled to
indemnification satisfactory to it against losses or expenses caused by the
taking of such action. This


                                      -41-


Section 6.05 shall be in lieu of Section 316(a)1(A) of the TIA and such
Section 316(a)1(A) is hereby expressly excluded from this Indenture, as
permitted by the TIA.

          SECTION 6.06.  LIMITATION ON SUITS.  A Securityholder may not pursue
any remedy with respect to this Indenture or the Securities unless:

          (1)  the Holder gives to the Trustee written notice stating that an
     Event of Default is continuing;

          (2)  the Holders of at least 25% in aggregate Principal Amount at
     Maturity of the Securities at the time outstanding make a written request
     to the Trustee to pursue the remedy;

          (3)  such Holder or Holders offer to the Trustee reasonable security
     or indemnity satisfactory to the Trustee against any loss, liability or
     expense;

          (4)  the Trustee does not comply with the request within 60 days after
     receipt of such notice, request and offer of security or indemnity; and

          (5)  the Holders of a majority in aggregate Principal Amount at
     Maturity of the Securities at the time outstanding do not give the Trustee
     a direction inconsistent with the request during such 60-day period.

          A Securityholder may not use this Indenture to prejudice the rights of
any other Securityholder or to obtain a preference or priority over any other
Securityholder.

          SECTION 6.07.  RIGHTS OF HOLDERS TO RECEIVE PAYMENT.  Notwithstanding
any other provision of this Indenture, but subject to Article 10, the right of
any Holder to receive payment of the Principal Amount at Maturity, Issue Price
plus accrued Original Issue Discount, cash in respect of a conversion in
accordance with Article 11, Redemption Price, Purchase Price, Change in Control
Purchase Price or interest, if any, in respect of the Securities held by such
Holder, on or after the respective due dates expressed in the Securities or any
Redemption Date, and to convert the Securities in accordance with Article 11, or
to bring suit for the enforcement of any such payment on or after such
respective dates or the right to convert, shall not be impaired or affected
adversely without the consent of such Holder.

          SECTION 6.08.  COLLECTION SUIT BY TRUSTEE.  If an Event of Default
described in Section 6.01(1) occurs and is continuing, the Trustee may recover
judgment in its own name and as trustee of an express trust against the Company
for the whole amount


                                      -42-


owing with respect to the Securities and the amounts provided for in Section
7.07.

          SECTION 6.09.  TRUSTEE MAY FILE PROOFS OF CLAIM.  In case of the
pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other judicial
proceeding relative to the Company or any other obligor upon the Securities or
the property of the Company or of such other obligor or their creditors, the
Trustee (irrespective of whether the Principal Amount at Maturity, Issue Price
plus accrued Original Issue Discount, cash in respect of a conversion in
accordance with Article 11, Redemption Price, Purchase Price, Change in Control
Purchase Price or interest, if any, in respect of the Securities 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 any such amount) shall be entitled and empowered, by
intervention in such proceeding or otherwise,

          (a)  to file and prove a claim for the whole amount of the Principal
     Amount at Maturity, Issue Price plus accrued Original Issue Discount, cash
     in respect of a conversion in accordance with Article 11, Redemption Price,
     Purchase Price, Change in Control Purchase Price, or interest, if any, 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
     advances, reasonable compensation, expenses and disbursements of the
     Trustee, its agents and counsel or any other amounts due the Trustee under
     Section 7.07) and of the Holders allowed in such judicial proceeding, and

          (b)  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 7.07.

          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 Securities
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;


                                      -43-


provided, however, that the Trustee may, on behalf of the Holders, vote for the
election of a trustee in bankruptcy or similar official and may be a member of
the creditors' committee.

          SECTION 6.10.  PRIORITIES.  If the Trustee collects any money pursuant
to this Article 6, it shall pay out the money in the following order:

          FIRST:  to the payment of costs and expenses of collection, including
     all sums paid or advanced by the Trustee hereunder and the reasonable
     compensation, expenses and disbursements of the Trustee, its agents and
     counsel, and all other amounts due the Trustee under Section 7.07;

          SECOND:  to holders of Senior Indebtedness to the extent required by
     Article 10;

          THIRD:  to Securityholders for amounts due and unpaid on the
     Securities for the Principal Amount at Maturity, Issue Price plus accrued
     Original Issue Discount, cash in respect of conversions in accordance with
     Article 11, Redemption Price, Purchase Price, Change in Control Purchase
     Price or interest, if any, as the case may be, ratably, without preference
     or priority of any kind, according to such amounts due and payable on the
     Securities; and

          FOURTH:  the balance, if any, to the Company.

          The Trustee may fix a record date and payment date for any payment to
Securityholders pursuant to this Section 6.10.  At least 15 days before such
record date, the Trustee shall mail to each Securityholder and the Company a
notice that states the record date, the payment date and the amount to be paid.

          SECTION 6.11.  UNDERTAKING FOR COSTS.  In any suit for the enforcement
of any right or remedy under this Indenture or in any suit against the Trustee
for any action taken or omitted by it as Trustee, a court in its discretion may
require the filing by any party litigant (other than the Trustee) in the suit of
an undertaking to pay the costs of the suit, and the court in its discretion may
assess reasonable costs, including reasonable attorneys' fees, against any party
litigant in the suit, having due regard to the merits and good faith of the
claims or defenses made by the party litigant.  This Section 6.11 does not apply
to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 or a suit
by Holders of more than 10% in aggregate Principal Amount at Maturity of the
Securities at the time outstanding.  This Section 6.11 shall be in lieu of
Section 315(e) of the TIA and such Section 315(e) is hereby expressly excluded
from this Indenture, as permitted by the TIA.


                                      -44-


          SECTION 6.12.  WAIVER OF STAY, EXTENSION OR USURY 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 or any usury or other law
wherever enacted, now or at any time hereafter in force, which would prohibit or
forgive the Company from paying all or any portion of the Principal Amount at
Maturity, Issue Price plus accrued Original Issue Discount, cash in respect of a
conversion in accordance with Article 11, Redemption Price, Purchase Price or
Change in Control Purchase Price in respect of Securities, or any interest on
such amounts, as contemplated herein, or which 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.


                                    ARTICLE 7

                                     TRUSTEE

          SECTION 7.01.  DUTIES OF TRUSTEE.  (a)  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 its
exercise as a prudent man would exercise or use under the circumstances in the
conduct of his own affairs.

          (b)  Except during the continuance of an Event of Default:

               (1)  the Trustee need perform only those duties that are
     specifically set forth in this Indenture and the Trustee shall not be
     liable except for the performance of such duties and obligations as are
     specifically set forth in this Indenture, and no implied covenants or
     obligations shall be read into this Indenture against the Trustee; and

               (2)  in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon any statements, certificates or
     opinions furnished to the Trustee and conforming to the requirements of
     this Indenture.  However, the Trustee shall examine the certificates and
     opinions to determine whether or not they conform to the requirements of
     this Indenture.


                                      -45-


This Section 7.01(b) shall be in lieu of Section 315(a) of the TIA and such
Section 315(a) is hereby expressly excluded from this Indenture, as permitted by
the TIA.

          (c) The Trustee may not be relieved from liability for its own
negligent action, its own negligent failure to act or its own willful
misconduct, except that:

               (1)  this paragraph (c) does not limit the effect of paragraph
     (b) of this Section 7.01;

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

               (3)  the Trustee shall not be liable with respect to any action
     it takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.05.

Subparagraphs (c)(1), (2) and (3) shall be in lieu of Sections 315(d)(1),
315(d)(2) and 315(d)(3) of the TIA and such Sections 315(d)(1), 315(d)(2) and
315(d)(3) are hereby expressly excluded from this Indenture, as permitted by the
TIA.

          (d)  Every provision of this Indenture that in any way relates to the
Trustee is subject to paragraphs (a), (b), (c) and (e) of this Section 7.01.

          (e)  No provision of this Indenture shall require the Trustee to
perform any duty or exercise any right or power or extend or risk its own funds
or otherwise incur any financial liability in the performance of its duties
hereunder, or in the exercise of any of its rights or powers, if it shall have
reasonable grounds for believing that the repayment of such funds or adequate
security and indemnity against such risk or liability are not reasonably assured
to it.

          (f)  Money held by the Trustee in trust hereunder need not be
segregated from other funds except to the extent required by law.  Neither the
Trustee (acting in any capacity hereunder) nor the Paying Agent shall be under
any liability for interest on any money received by it hereunder unless
otherwise agreed in writing with the Company.

          SECTION 7.02.  RIGHTS OF TRUSTEE.  Subject to its duties and
responsibilities under the TIA,

          (a)  The Trustee may rely and shall be protected in acting or
refraining from acting upon any document believed by it to be genuine and to
have been signed or presented by the proper


                                      -46-


person.  The Trustee need not investigate any fact or matter stated in the
document.

          (b)  Before the Trustee acts or refrains from acting, it may require
an Officers' Certificate or an Opinion of Counsel.  The Trustee shall not be
liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel.

          (c)  The Trustee may act through agents and shall not be responsible
for the misconduct or negligence of any agent appointed with due care.

          (d)  The Trustee shall not be liable for any action it takes or omits
to take in good faith which it believes to be authorized or within its rights or
powers.

          (e)  The Trustee may consult with counsel selected by it and any
advice or Opinion of Counsel shall be full and complete authorization and
protection in respect of any action taken or suffered or omitted by it hereunder
in good faith and in accordance with such advice or Opinion of Counsel.

          (f)  The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request, order or
direction of any of the Holders, pursuant to the provisions of this Indenture,
unless such Holders shall have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities which may be incurred
therein or thereby.

          (g)   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.

          (h)  Prior to the occurrence of an Event of Default hereunder and
after the curing or waiving of all Events of Default, the Trustee shall not be
bound to make any investigation into the facts or matters stated in any
resolution, officer's certificate, or other certificate, statement, instrument,
opinion, report, notice, request, consent, order, approval, appraisal, bond,
debenture, note, coupon, security, or other paper or document unless requested
in writing so to do by the Holders of not less than a majority in aggregate
principal amount of the Securities then outstanding; PROVIDED, that, if the
payment within a reasonable time to the Trustee of the costs, expenses or
liability likely to be incurred by it in the making of such investigation is, in
the opinion of the Trustee, not reasonably assured to the Trustee by the
security afforded to it


                                      -47-


by the terms of this Indenture, the Trustee may require reasonable indemnity
against such expenses or liabilities as a condition to proceeding; the
reasonable expenses of every such examination shall be paid by the Company or,
if advanced by the Trustee, shall be repaid by the Company upon demand.

          (i)  The Trustee shall not be responsible for the computation of any
adjustment to the Conversion Price or for any determination as to whether an
adjustment is required.

          (j)  The Trustee shall not be required to give any bond or surety in
respect of the performance of its powers and duties hereunder.

          (k)  The Trustee shall not be bound to ascertain or inquire as to the
performance or observance of any covenants, conditions or agreements on the part
of the Company, except as otherwise set forth herein, but the Trustee may
require of the Company full information and advice as to the performance of the
covenants, conditions and agreements contained herein and shall be entitled in
connection herewith to examine the books, records and premises of the Company.

          (l)  The permissive rights of the Trustee to do things enumerated in
this Indenture shall not be construed as a duty and the Trustee shall not be
answerable for other than its negligence or willful default.

          (m)  Except for (i) a default under Section 601(1)(6) hereof, and (ii)
any other event of which the Trustee has "actual knowledge" and which event,
with the giving of notice or the passage of time or both, would constitute an
Event of Default under this Indenture, the Trustee shall not be deemed to have
notice of any default or event unless specifically notified in writing of such
event by the Company or the Holders of not less than 25% in aggregate principal
amount of the Securities Outstanding; as used herein, the term "actual
knowledge" means the actual fact or statement of knowing, without any duty to
make any investigation with regard thereto.

          SECTION 7.03.  INDIVIDUAL RIGHTS OF TRUSTEE.  The Trustee in its
individual or any other capacity may become the owner or pledgee of Securities
and may otherwise deal with the Company or its Affiliates with the same rights
it would have if it were not Trustee.  Any Paying Agent, Registrar, Conversion
Agent or co-registrar may do the same with like rights.  However, the Trustee
must comply with Sections 7.10 and 7.11.

          SECTION 7.04.  TRUSTEE'S DISCLAIMER.  The Trustee makes no
representation as to the validity or adequacy of this Indenture or the
Securities, it shall not be accountable for the Company's use or application of
the proceeds from the Securities,


                                      -48-


it shall not be responsible for any statement in the registration statement or
prospectus for the Securities under the Securities Act or in the Indenture or
the Securities (other than its certificate of authentication), or the
determination as to which beneficial owners are entitled to receive any notices
hereunder.

          SECTION 7.05.  NOTICE OF DEFAULTS.  If a Default occurs and if it is
known to the Trustee, the Trustee shall give to each Securityholder notice of
the Default within 90 days after it occurs unless such Default shall have been
cured or waived before the giving of such notice.  Except in the case of a
Default described either in Section 6.01(1) or Section 6.01(6), the Trustee may
withhold the notice if and so long as a committee of its Responsible Officers in
good faith determines that withholding the notice is in the interests of
Securityholders.  The second sentence of this Section 7.05 shall be in lieu of
the proviso to Section 315(b) of the TIA and such proviso is hereby expressly
excluded from this Indenture, as permitted by the TIA.

          SECTION 7.06.  REPORTS BY TRUSTEE TO HOLDERS.  To the extent required
by the TIA, within 60 days after each May 15 and commencing with the first May
15 following the date of this Indenture, the Trustee shall mail to each
Securityholder a brief report dated as of such May 15 that complies with TIA
Section 313(a), if required by such Section 313(a).  The Trustee also shall
comply with TIA Section 313(b).

          A copy of each report at the time of its mailing to Securityholders
shall be filed with the SEC and each securities exchange on which the Securities
are listed.  The Company agrees to notify the Trustee whenever the Securities
become listed on any securities exchange and of any delisting thereof.

          SECTION 7.07.  COMPENSATION AND INDEMNITY.  The Company agrees:

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

          (b)  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, advances and disbursements of its agents and
     counsel), except any such expense, disbursement or advance as may be
     attributable to its negligence or willful misconduct; and


                                      -49-


          (c)  to indemnify the Trustee for, and to hold it harmless against,
     any loss, damage, claim, liability, cost or expense (including attorney's
     fees) incurred without negligence or willful misconduct on its part,
     arising out of or in connection with the acceptance or administration of
     this trust, including, without limitation, any liability whatsoever related
     to the violations of federal or state securities laws and the costs and
     expenses of defending itself against or investigating any claim or
     liability in connection with the exercise or performance of any of its
     powers or duties hereunder.

          To secure the Company's payment obligations in this Section 7.07, the
Trustee shall have a lien prior to the Securities on all money or property held
or collected by the Trustee, except that held in trust to pay the Principal
Amount at Maturity, Issue Price plus accrued Original Issue Discount, Redemption
Price, Purchase Price, Change in Control Purchase Price or interest, if any, as
the case may be, on, or cash in respect of a conversion of, particular
Securities.

          The Company's payment obligations pursuant to this Section 7.07 shall
survive the discharge of this Indenture.  When the Trustee incurs expenses after
the occurrence of a Default specified in Section 6.01(4) or (5), the expenses
are intended to constitute expenses of administration under any Bankruptcy Law.

          SECTION 7.08.  REPLACEMENT OF TRUSTEE.  The Trustee may resign by so
notifying the Company; PROVIDED, HOWEVER, no such resignation shall be effective
until a successor Trustee has accepted its appointment pursuant to this Section
7.08.  The Holders of a majority in aggregate Principal Amount at Maturity of
the Securities at the time outstanding may remove the Trustee by so notifying
the Trustee and the Company.  The Company may remove the Trustee at any time
without the consent of any Holder of Securities, provided that no Event of
Default, or event which following notice or the passage of time or both would
constitute an Event of Default, shall then exist with respect to the Securities
and such removal does not adversely affect the interests of any Holder of
Securities.  The Company shall remove the Trustee if:

          (1)  the Trustee fails to comply with Section 7.10;

          (2)  the Trustee is adjudged bankrupt or insolvent;

          (3)  a receiver or public officer takes charge of the Trustee or its
     property; or

          (4)  the Trustee otherwise becomes incapable of acting.


                                      -50-


          If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint, by
resolution of its Board of Directors, a successor Trustee.

          A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company satisfactory in form and
substance to the retiring Trustee and the Company.  Thereupon the resignation or
removal of the retiring Trustee shall become effective, and the successor
Trustee shall have all the rights, powers and duties of the Trustee under this
Indenture.  The successor Trustee shall mail a notice of its succession to
Securityholders.  The retiring Trustee shall promptly transfer all property held
by it as Trustee to the successor Trustee, subject to the lien provided for in
Section 7.07.

          If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding may petition any court of competent
jurisdiction for the appointment of a successor Trustee.

          If the Trustee fails to comply with Section 7.10, any Securityholder
may petition any court of competent jurisdiction for the removal of the Trustee
and the appointment of a successor Trustee.

          SECTION 7.09.  SUCCESSOR TRUSTEE BY MERGER.  If the Trustee
consolidates with, merges or converts into, or transfers all or substantially
all its corporate trust business or assets to, another corporation, the
resulting, surviving or transferee corporation without any further act shall be
the successor Trustee.

          SECTION 7.10.  ELIGIBILITY; DISQUALIFICATION.  The Trustee shall at
all times satisfy the requirements of TIA Sections 310(a)(1) and 310(b).  The
Trustee shall have a combined capital and surplus of at least $50,000,000 as set
forth in its most recent published annual report of condition.  Nothing herein
contained shall prevent the Trustee from filing with the Commission the
application referred to in the penultimate paragraph of TIA Section 310(b).

          SECTION 7.11.  PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.  The
Trustee shall comply with TIA Section 311(a), excluding any creditor
relationship listed in TIA Section 311(b).  A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated therein.


                                      -51-



                                    ARTICLE 8

                             DISCHARGE OF INDENTURE

          SECTION 8.01.  DISCHARGE OF LIABILITY ON SECURITIES.  When (i) the
Company delivers to the Trustee all outstanding Securities (other than
Securities replaced pursuant to Section 2.07) for cancellation or (ii) all
outstanding Securities have become due and payable and the Company deposits with
the Trustee cash or, if expressly permitted by the terms of the Securities,
securities sufficient to pay all amounts due and owing on all outstanding
Securities (other than Securities replaced pursuant to Section 2.07), and if in
either case the Company pays all other sums payable hereunder by the Company,
then this Indenture shall, subject to Section 7.07, cease to be of further
effect.  The Trustee shall join in the execution of a document prepared by the
Company acknowledging satisfaction and discharge of this Indenture on demand of
the Company accompanied by an Officers' Certificate and Opinion of Counsel and
at the cost and expense of the Company.

               SECTION 8.02.  REPAYMENT TO THE COMPANY.  The Trustee and the
Paying Agent shall return to the Company upon written request any money or
securities held by them for the payment of any amount with respect to the
Securities that remains unclaimed for two years, PROVIDED, HOWEVER, that the
Trustee or such Paying Agent, before being required to make any such return, may
at the expense of the Company cause to be published once in a newspaper of
general circulation in the City of New York or mail to each Holder entitled to
the money or securities notice that such money or securities remains unclaimed
and that, after a date specified therein, which shall not be less than 30 days
from the date of such publication or mailing, any unclaimed money or securities
then remaining will be returned to the Company.  After return to the Company,
Holders entitled to the money or securities must look solely to the Company for
payment as general creditors unless an applicable abandoned property law
designates another person and the Trustee and the Paying Agent shall have no
further liability to the Securityholders with respect to such money or
securities for that period commencing after the return thereof.


                                    ARTICLE 9

                                   AMENDMENTS

          SECTION 9.01.  WITHOUT CONSENT OF HOLDERS.  The Company and the
Trustee may amend this Indenture or the Securities without the consent of any
Securityholder:

          (1)  to cure any ambiguity, omission, defect or inconsistency;


                                      -52-


          (2)  to comply with Article 5 or Section 11.14;

          (3)  to provide for uncertificated Securities in addition to
     certificated Securities so long as such uncertificated Securities are in
     registered form for purposes of the Internal Revenue Code of 1986, as
     amended;

          (4)  to eliminate the Company's option to pay cash in lieu of
     delivering Common Shares upon conversion of Securities (other than cash in
     lieu of fractional shares and except with respect to such elections already
     made by the Company to so pay cash) or to eliminate the Company's option to
     enter into Common Share Delivery Arrangements in respect of conversions of
     Securities pursuant to Section 11.19 (except for those Common Share
     Delivery Arrangements already entered into);

          (5)  to make any change that does not adversely affect the rights of
     any Securityholder; or

          (6)  to make any change to comply with the TIA, or any amendment
     thereto, or to comply with any requirement of the SEC in connection with
     the qualification of the Indenture under the TIA.

          SECTION 9.02.  WITH CONSENT OF HOLDERS.  With the written consent of
the Holders of at least a majority in aggregate Principal Amount at Maturity of
the Securities at the time outstanding, the Company and the Trustee may amend
this Indenture or the Securities in any manner.  However, without the consent of
each Securityholder affected, an amendment to this Indenture or the Securities
may not:

          (1)  make any change to the Principal Amount at Maturity of Securities
     whose Holders must consent to an amendment;

          (2)  make any change in the manner or rate of accrual in connection
     with Original Issue Discount, reduce the rate of interest referred to in
     paragraph 1 of the Securities or extend the time for payment of Original
     Issue Discount or interest, if any, on any Security;

          (3)  reduce the Principal Amount at Maturity or the Issue Price of or
     extend the Stated Maturity of any Security;

          (4)  reduce the amount of cash the Company must pay in respect of a
     conversion of any Security in accordance with Article 11 or the Redemption
     Price, Purchase Price or Change in Control Purchase Price of any Security;


                                      -53-


          (5)  make any Security payable in money or securities other than that
     stated in the Security;

          (6)  make any change in Article 10 that adversely affects the rights
     of any Securityholder;

          (7)  make any change in Section 6.04, Section 6.07 or this Section
     9.02, except to increase any percentage set forth therein;

          (8)  make any change that materially adversely affects the right to
     convert any Security (including the right to receive cash in lieu of Common
     Shares upon conversion in accordance with the terms of Article 11, other
     than the elimination of the Company's option to pay cash in lieu of
     delivering Common Shares or to enter into Common Share Delivery
     Arrangements upon conversion of Securities, as set forth in
     Section 9.01(4)); or

          (9)  make any change that materially adversely affects the right to
     require the Company to purchase the Securities in accordance with the terms
     thereof and this Indenture (including, without limitation, the right to
     receive cash in lieu of or in combination with Common Shares and/or
     specified TDS Common Equity Securities upon purchase by the Company at the
     option of the Holders of Securities in accordance with Section 3.08).

          It shall not be necessary for the consent of the Holders under this
Section 9.02 to approve the particular form of any proposed amendment, but it
shall be sufficient if such consent approves the substance thereof.

          An amendment under this Section 9.02 or Section 9.01 may not make any
change that adversely affects the rights under Article 10 of any holder of
Senior Indebtedness then outstanding unless the requisite holders of such Senior
Indebtedness consent to such change pursuant to the terms of such Senior
Indebtedness.

          After an amendment under this Section 9.02 becomes effective, the
Company shall mail to each Holder a notice briefly describing the amendment.

          SECTION 9.03.  COMPLIANCE WITH TRUST INDENTURE ACT.  Every
supplemental indenture executed pursuant to this Article shall comply with the
TIA.

          SECTION 9.04.  REVOCATION AND EFFECT OF CONSENTS, WAIVERS AND ACTIONS.
Until an amendment, waiver or other action by Holders becomes effective, a
consent thereto by a Holder of a Security hereunder is a continuing consent by
the Holder and every subsequent Holder of that Security or portion of the


                                      -54-


Security that evidences the same obligation as the consenting Holder's Security,
even if notation of the consent, waiver or action is not made on the Security.
However, any such Holder or subsequent Holder may revoke the consent, waiver or
action as to such Holder's Security or portion of the Security if the Trustee
receives the notice of revocation before the date the amendment, waiver or
action becomes effective.  After an amendment, waiver or action becomes
effective, it shall bind every Securityholder.

          SECTION 9.05.  NOTATION ON OR EXCHANGE OF SECURITIES.  Securities
authenticated and delivered after the execution of any supplemental indenture
pursuant to this Article may 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, new Securities so modified as to conform, in the opinion of the
Trustee and the Board of Directors, to any such supplemental indenture may be
prepared and executed by the Company and authenticated and delivered by the
Trustee in exchange for outstanding Securities.

          SECTION 9.06.  TRUSTEE TO SIGN SUPPLEMENTAL INDENTURES.  The Trustee
shall sign any supplemental indenture authorized pursuant to this Article 9 if
the amendment contained therein does not adversely affect the rights, duties,
liabilities or immunities of the Trustee.  If it does, the Trustee may, but need
not, sign such supplemental indenture.  In signing such supplemental indenture
the Trustee shall be entitled to receive, and (subject to the provisions of
Section 7.01) shall be fully protected in relying upon, an Officers' Certificate
and an Opinion of Counsel stating that such amendment is authorized or permitted
by this Indenture.

          SECTION 9.07.  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 Securities
theretofore or thereafter authenticated and delivered hereunder shall be bound
thereby.


                                   ARTICLE 10

                                  SUBORDINATION

          SECTION 10.01.  SECURITIES SUBORDINATE TO SENIOR INDEBTEDNESS.  The
Company covenants and agrees, and each Holder of a Security by such Holder's
acceptance thereof likewise covenants and agrees, that, to the extent and in the
manner hereinafter set forth in this Article 10, the indebtedness represented by
the Securities and the payment of the Principal Amount at Maturity, Issue Price
plus accrued Original Issue


                                      -55-


Discount, cash in respect of a conversion (other than cash in lieu of fractional
shares upon conversion), Redemption Price, Purchase Price, Change in Control
Purchase Price and interest, if any, in respect of each and all of the
Securities are hereby expressly made subordinate and subject in right of payment
to the prior payment in full of all Senior Indebtedness.

          "SENIOR INDEBTEDNESS" means the principal of (and premium, if any) and
interest on (including interest accruing after the filing of a petition
initiating any proceeding pursuant to any Bankruptcy Law (including, with
respect to the Amended and Restated Term Loan Agreement, dated as of December
22, 1994, between the Company and NTFC Capital Corporation (and any other Debt
if the instrument creating or evidencing the same expressly provides therefor),
such interest whether or not allowed as a claim in such proceeding, but, with
respect to all other Debt, only to the extent allowed or permitted to the holder
of such Debt against the bankruptcy or other insolvency estate of the Company in
such proceeding)) and fees, expenses, reimbursement obligations, indemnity
obligations and other amounts due on or in connection with any Debt incurred,
assumed or guaranteed by the Company, whether outstanding on the date of the
Indenture or thereafter incurred, assumed or guaranteed and all deferrals,
renewals, extensions and refundings of, or amendments, modifications or
supplements to, any such Debt; PROVIDED, HOWEVER, that the following will not
constitute Senior Indebtedness:  (a) any Debt if the instrument creating the
same or evidencing the same or pursuant to which the same is outstanding
expressly provides (i) that such Debt shall not be senior in right of payment to
the Securities, or (ii) that such Debt shall be subordinated to any other Debt
of the Company, unless such instrument expressly provides that such Debt shall
be senior in right of payment to the Securities; and (b) any Debt of the Company
in respect of the Securities.

          SECTION 10.02.  PAYMENT OVER OF PROCEEDS UPON DISSOLUTION, ETC.  Upon
any distribution of assets of the  Company in the event of

          (a)  any insolvency or bankruptcy case or proceeding, or any
     receivership, liquidation, reorganization or other similar case or
     proceeding in connection therewith, relative to the Company or to its
     creditors, as such, or to its assets, or

          (b)  any liquidation, dissolution or other winding up of the Company,
     whether voluntary or involuntary and whether or not involving insolvency or
     bankruptcy, or

          (c)  any assignment for the benefit of creditors or any other
     marshalling of assets and liabilities of the Company,


                                      -56-


then and in any such event

          (1)  the holders of Senior Indebtedness shall be entitled to receive
     payment in full of all amounts due or to become due on or in respect of all
     Senior Indebtedness before the Holders of the Securities are entitled to
     receive any payment on account of the Principal Amount at Maturity, Issue
     Price plus accrued Original Issue Discount, cash in respect of a conversion
     (other than cash in lieu of fractional shares upon conversion) Redemption
     Price, Purchase Price, Change in Control Purchase Price or interest, if
     any, in respect of the Securities; and

          (2)  any payment or distribution of assets of the Company of any kind
     or character, whether in cash, property or securities, by set-off or
     otherwise, to which the Holders or the Trustee would be entitled but for
     the provisions of this Article 10, including any such payment or
     distribution which may be payable or deliverable by reason of the payment
     of any other Debt of the Company being subordinated to the payment of the
     Securities, shall be paid by the liquidating trustee or agent or other
     person making such payment or distribution, whether a trustee in
     bankruptcy, a receiver or liquidating trustee or otherwise, directly to the
     holders of Senior Indebtedness or their representative or representatives
     or to the trustee or trustees under any indenture under which any
     instruments evidencing any of such Senior Indebtedness may have been
     issued, ratably according to the aggregate amounts remaining unpaid on
     account of the principal of, and premium, if any, and interest on the
     Senior Indebtedness held or represented by each, to the extent necessary to
     make payment in full of all Senior Indebtedness remaining unpaid, after
     giving effect to any concurrent payment or distribution to the holders of
     such Senior Indebtedness.

          In the event that, notwithstanding the foregoing provisions of this
Section 10.02, the Company shall have made payment to the Trustee or directly to
the Holder of any Security of any payment or distribution of assets of the
Company of any kind or character, whether such payment shall be in cash,
property or securities, including any such payment or distribution which may be
payable or deliverable by reason of the payment of any other Debt of the Company
being subordinated to the payment of the Securities, before all Senior
Indebtedness is paid in full or payment thereof provided for, and if such fact
shall then have been made known to the Trustee as provided in Section 10.10 or
such Holder, as the case may be, pursuant to the terms of this Indenture, then
and in such event such payment or distribution shall be paid over or delivered
forthwith to the trustee in bankruptcy, receiver, liquidating trustee,
Custodian, assignee, agent or other person making payment or distribution of


                                      -57-


assets of the Company for application to the payment of all Senior Indebtedness
remaining unpaid, to the extent necessary to pay all Senior Indebtedness in
full, after giving effect to any concurrent payment or distribution to or for
the holders of Senior Indebtedness.

          For purposes of this Article 10 only, the words "CASH, PROPERTY OR
SECURITIES" shall not be deemed to include shares of Capital Stock of the
Company as reorganized or readjusted, or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment the payment
of which is subordinated, at least to the extent provided in this Article 10
with respect to the Securities, to the payment of all Senior Indebtedness which
may at the time be outstanding; provided, however, that (i) Senior Indebtedness
is assumed by the new corporation, if any, resulting from any such
reorganization or readjustment, and (ii) the rights of the holders of the Senior
Indebtedness are not, without the consent of such holders, altered by such
reorganization or readjustment.

          The consolidation of the Company with, or the merger of the Company
into, another person or the liquidation or dissolution of the Company following
the conveyance or transfer of its properties and assets substantially as an
entirety to another person upon the terms and conditions set forth in Article 5
shall not be deemed a dissolution, winding up, liquidation, reorganization,
assignment for the benefit of creditors or marshalling of assets and liabilities
of the Company for the purposes of this Section 10.02 if the person formed by
such consolidation or into which the Company is merged or the person which
acquires by conveyance or transfer the properties and assets of the Company
substantially as an entirety, as the case may be, shall, as a part of such
consolidation, merger, conveyance or transfer, comply with the conditions set
forth in Article 5.

          SECTION 10.03.  ACCELERATION OF SECURITIES.  In the event that any
Securities are declared due and payable before their Stated Maturity pursuant to
Section 6.02, then and in such event the Company shall promptly, and in any
event within ten Business Days of the occurrence thereof, notify holders of
Senior Indebtedness of such acceleration.  The Company may not make any payment
on the Securities until 120 days have passed after such notice of acceleration
is given to holders of Senior Indebtedness and may thereafter pay the Securities
if this Article 10 permits the payment at that time.

          In the event that, notwithstanding the foregoing, the Company shall
make any payment to the Trustee or directly to the Holder of any Securities
prohibited by the foregoing provisions of this Section 10.03, and if such facts
shall, at or prior to the time of such payment, have been made known to the
Trustee as


                                      -58-


provided in Section 10.10 or such Holder, as the case may be, pursuant to the
terms of this Indenture, then and in such event such payment shall be paid over
and delivered forthwith to the Company by or on behalf of the person holding
such payment for the benefit of the holders of Senior Indebtedness.

          The provisions of this Section 10.03 shall not apply to any payment
with respect to which Section 10.02 would be applicable.

          SECTION 10.04.  DEFAULT ON SENIOR INDEBTEDNESS.  The Company may not
make any payment of the Principal Amount at Maturity, Issue Price plus accrued
Original Issue Discount, cash in respect of conversion (other than cash in lieu
of fractional shares upon conversion), Redemption Price, Change in Control
Purchase Price or interest, if any, in respect of the Securities and may not pay
cash in respect of the Purchase Price (or portion thereof) of any Security
(other than for fractional shares) or otherwise acquire any Securities for cash
or property (except as otherwise provided by Article 11 with respect to the
conversion of Securities for Common Shares (and for cash in lieu of fractional
shares upon conversion) and otherwise for Capital Stock of the Company) if:

          (1)  a default on Senior Indebtedness occurs and is continuing that
     permits holders of such Senior Indebtedness to accelerate its maturity; and

          (2)  the default is the subject of judicial proceedings or the Company
     receives a notice of default thereof from any person who may give such
     notice pursuant to the instrument evidencing or document governing such
     Senior Indebtedness.  If the Company receives any such notice, then a
     similar notice received within nine months thereafter relating to the same
     default (as distinguished from a subsequent default, including a subsequent
     default of the same provision) on the same issue of Senior Indebtedness
     shall not be effective for purposes of this Section 10.04.

          The Company may resume payments on the Securities and may acquire
Securities if and when:

          (A)  the default is cured or waived in accordance with the terms of
     such Senior Indebtedness; or

          (B)  in the case of defaults on Senior Indebtedness other than payment
     defaults, 120 or more days pass after the receipt by the Company of the
     notice described in clause (2) above and the default is not then the
     subject of judicial proceedings; and


                                      -59-


this Article 10 otherwise permits the payment or acquisition at that time.

          In the event that, notwithstanding the foregoing, the Company shall
make any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section 10.04, and if such facts shall, at or prior
to the time of such payment, have been made known to the Trustee as provided in
Section 10.10 or such Holder, as the case may be, pursuant to the terms of this
Indenture, then and in such event such payment shall be paid over and delivered
forthwith to the Company by or on behalf of the person holding such payment for
the benefit of the holders of the Senior Indebtedness.

          Nothing contained in this Article 10 or elsewhere in this Indenture or
in any of the Securities shall prevent the conversion by a Holder of any
Securities in accordance with the provisions for conversion of such Securities
set forth in this Indenture, including the payment of cash in lieu of fractional
Common Shares in accordance with Article 11, or in any of such Securities in the
event of an occurrence of the events described in clauses (1) and (2) of this
Section 10.04; provided that upon such conversion the Company (or, in the case
of a Common Share Delivery Arrangement, the Standby Share Deliverer or, in the
case of a failure by the Standby Share Deliverer to so deliver, the Company in
accordance with Article 11) delivers Common Shares and not cash (other than cash
in lieu of fractional shares upon such conversion).

          The provisions of this Section 10.04 shall not apply to any payment
with respect to which Section 10.02 would be applicable.

          SECTION 10.05.  PAYMENT PERMITTED IF NO DEFAULT.  Nothing contained in
this Article 10 or elsewhere in this Indenture or in any of the Securities shall
prevent (a) the Company, at any time except during the pendency of any case,
proceeding, dissolution, liquidation or other winding up, assignment for the
benefit of creditors or other marshalling of assets and liabilities of the
Company referred to in Section 10.02 or under the conditions described in
Section 10.03 or 10.04, from making payments at any time of the Principal Amount
at Maturity, Issue Price plus accrued Original Issue Discount, cash in respect
of conversion in accordance with Article 11, Redemption Price, Purchase Price,
Change in Control Purchase Price or interest, if any, as the case may be, in
respect of the Securities, or (b) the application by the Trustee or the
retention by any Holder of any money deposited with it hereunder to the payment
of or on account of the Principal Amount at Maturity, Issue Price plus accrued
Original Issue Discount, cash in respect of conversion in accordance with
Article 11, Redemption Price, Purchase Price, Change in Control Purchase


                                      -60-


Price or interest, if any, as the case may be, in respect of the Securities if
the Trustee did not have, at the time provided in the proviso to the first
paragraph of Section 10.10, notice that such payment would have been prohibited
by the provisions of this Article 10.

          SECTION 10.06.  SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR
INDEBTEDNESS.  Subject to the payment in full of all Senior Indebtedness, the
Holders of the Securities shall be subrogated to the extent of the payments or
distributions made to the holders of such Senior Indebtedness pursuant to the
provisions of this Article 10 (equally and ratably with the holders of all
indebtedness of the Company which by its express terms is subordinated to
indebtedness of the Company to substantially the same extent as the Securities
are subordinated and is entitled to like rights of subrogation) to the rights of
the holders of such Senior Indebtedness to receive payments or distributions of
cash, property or securities applicable to the Senior Indebtedness until the
Principal Amount at Maturity, Issue Price plus accrued Original Issue Discount,
cash in respect of conversion in accordance with Article 11, Redemption Price,
Purchase Price or Change in Control Purchase Price or interest, if any, as the
case may be, in respect of the Securities shall be paid in full.  For purposes
of such subrogation, no payments or distributions to the holders of the Senior
Indebtedness of any cash, property or securities to which the Holders of the
Securities or the Trustee would be entitled except for the provisions of this
Article 10, and no payments pursuant to the provisions of this Article 10 to the
Company or to the holders of Senior Indebtedness by Holders of the Securities or
the Trustee, shall, as between the Company, its creditors other than holders of
Senior Indebtedness and the Holders of the Securities, be deemed to be a payment
or distribution by the Company to or on account of the Senior Indebtedness.

          SECTION 10.07.  PROVISIONS SOLELY TO DEFINE RELATIVE RIGHTS.  The
provisions of this Article 10 are and are intended solely for the purpose of
defining the relative rights of the Holders of the Securities, on one hand, and
the holders of Senior Indebtedness, on the other hand.  Nothing contained in
this Article 10 or elsewhere in this Indenture or in the Securities is intended
to or shall

          (a)  impair, as among the Company, its creditors other than holders of
     Senior Indebtedness and the Holders of the Securities, the obligation of
     the Company, which is absolute and unconditional, to pay to the Holders of
     the Securities the Principal Amount at Maturity, Issue Price plus accrued
     Original Issue Discount, cash in respect of conversion in accordance with
     Article 11, Redemption Price, Purchase Price, Change in Control Purchase
     Price, and interest, if any, as the case may be, in respect of the
     Securities as and


                                      -61-


     when the same shall become due and payable in accordance with the terms of
     the Securities and this Indenture and which, subject to the rights under
     this Article 10 of the holders of Senior Indebtedness, is intended to rank
     equally with all other general obligations of the Company; or

          (b)  affect the relative rights against the Company of the Holders of
     the Securities and creditors of the Company other than holders of Senior
     Indebtedness; or

          (c)  prevent the Trustee or the Holder of any Security from exercising
     all remedies otherwise permitted by applicable law upon default under this
     Indenture, subject to the rights, if any, under this Article 10 of the
     holders of Senior Indebtedness to receive cash, property or securities
     otherwise payable or deliverable to the Trustee or such Holder.

          SECTION 10.08.  TRUSTEE TO EFFECTUATE SUBORDINATION.  Each Holder of a
Security by such Holder's acceptance thereof authorizes and directs the Trustee
on such Holder's behalf to take such action as may be necessary or appropriate
to effectuate the subordination provided in this Article 10 and appoints the
Trustee such Holder's attorney-in-fact for any and all such purposes.

          SECTION 10.09.  NO WAIVER OF SUBORDINATION PROVISIONS.  No right of
any present or future holder of any Senior Indebtedness to enforce subordination
as herein provided shall at any time in any way be prejudiced or impaired by any
act or failure to act on the part of the Company or by any act or failure to
act, in good faith, by any such holder, or by any noncompliance by the Company
with the terms, provisions and covenants of this Indenture, regardless of any
knowledge thereof any such holder may have or be otherwise charged with.

          Without in any way limiting the generality of the foregoing paragraph,
the holders of Senior Indebtedness may, at any time and from time to time,
without the consent of, or notice to, the Trustee or the Holders of the
Securities, without incurring responsibility to the Holders of the Securities
and without impairing or releasing the subordination provided in this Article 10
or the obligations hereunder of the Holders of the Securities to the holders of
Senior Indebtedness, do any one or more of the following:  (i) change the
manner, place or terms of payment or extend the time of payment of, or renew or
alter, Senior Indebtedness, or otherwise amend or supplement in any manner
Senior Indebtedness or any instrument evidencing the same or any agreement under
which Senior Indebtedness is outstanding; (ii) sell, exchange, release or
otherwise dispose of any property pledged, mortgaged or otherwise securing
Senior Indebtedness; (iii) release any person liable in any manner for the
collection


                                      -62-


of Senior Indebtedness; and (iv) exercise or refrain from exercising any rights
against the Company or any other person.

          SECTION 10.10.  NOTICE TO TRUSTEE.  The Company shall give prompt
written notice to the Trustee of any fact known to the Company which would
prohibit the making of any payment to or by the Trustee in respect of the
Securities or that would permit the resumption of any such payment.
Notwithstanding the provisions of this Article 10 or any other provision of this
Indenture, the Trustee shall not be charged with knowledge of the existence of
any facts which would prohibit the making of any payment to or by the Trustee in
respect of the Securities or that would permit the resumption of any such
payment, unless and until the Trustee shall have received written notice thereof
from the Company or a holder of Senior Indebtedness or from any trustee or agent
therefor; and, prior to the receipt of any such written notice, the Trustee,
subject to the provisions of Section 7.01, shall be entitled in all respects to
assume that no such facts exist; PROVIDED, HOWEVER, that if a Responsible
Officer of the Trustee shall not have received, at least two Business Days prior
to the date upon which by the terms hereof any such money may become payable for
any purpose (including, without limitation, the payment of the Principal Amount
at Maturity, Issue Price plus accrued Original Issue Discount, cash in respect
of conversion in accordance with Article 11, Redemption Price, Purchase Price,
Change in Control Purchase Price or interest, if any, as the case may be, in
respect of any Security), the notice with respect to such money provided for in
this Section 10.10, then, anything herein contained to the contrary
notwithstanding, the Trustee shall have full power and authority to receive such
money and to apply the same to the purpose for which such money was received and
shall not be affected by any notice to the contrary which may be received by it
within two Business Days prior to such date.

          Subject to the provisions of Section 7.01, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a person
representing himself to be a holder of Senior Indebtedness (or a trustee or
agent on behalf of such holder) to establish that such notice has been given by
a holder of Senior Indebtedness (or a trustee or agent on behalf of any such
holder).  In the event that the Trustee determines in good faith that further
evidence is required with respect to the right of any person as a holder of
Senior Indebtedness to participate in any payment or distribution pursuant to
this Article 10, the Trustee may request such person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness
held by such person, the extent to which such person is entitled to participate
in such payment or distribution and any other facts pertinent to the rights of
such person under this Article 10, and if such evidence is not furnished, the
Trustee may defer any payment which it may be required to make for the benefit
of such person pursuant to the terms of this Indenture


                                      -63-


pending judicial determination as to the right of such person to receive such
payment.

          SECTION 10.11.  RELIANCE ON JUDICIAL ORDER OR CERTIFICATE OF
LIQUIDATING AGENT.  Upon any payment or distribution of assets of the Company
referred to in this Article 10, the Trustee, subject to the provisions of
Section 7.01, and the Holders of the Securities shall be entitled to rely upon
any order or decree entered by any court of competent jurisdiction in which such
insolvency, bankruptcy, receivership, liquidation, reorganization, dissolution,
winding up or similar case or proceeding is pending, or a certificate of the
trustee in bankruptcy, liquidating trustee, Custodian, receiver, assignee for
the benefit of creditors, agent or other person making such payment or
distribution, delivered to the Trustee or to the Holders of Securities, for the
purpose of ascertaining the persons entitled to participate in such payment or
distribution, the holders of Senior Indebtedness and other indebtedness of the
Company, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Article 10.

          SECTION 10.12.  TRUSTEE NOT FIDUCIARY FOR HOLDERS OF SENIOR
INDEBTEDNESS.  The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Indebtedness.  The Trustee shall not be charged with knowledge
of the existence of Senior Indebtedness or of any facts that would prohibit any
payment hereunder or that would permit the resumption of any such payment unless
a Responsible Officer of the Trustee shall have received notice to that effect
at the address of the Trustee set forth in Section 12.02.  With respect to the
holders of Senior Indebtedness, the Trustee undertakes to perform or to observe
only such of its covenants or obligations as are specifically set forth in this
Article 10 and no implied covenants or obligations with respect to holders of
Senior Indebtedness shall be read into this Indenture against the Trustee.

          SECTION 10.13.  RIGHTS OF TRUSTEE AS HOLDER OF SENIOR INDEBTEDNESS;
PRESERVATION OF TRUSTEE'S RIGHTS.  The Trustee in its individual capacity shall
be entitled to all the rights set forth in this Article 10 with respect to any
Senior Indebtedness which may at any time be held by it, to the same extent as
any other holder of Senior Indebtedness, and nothing in this Indenture shall
deprive the Trustee of any of its rights as such holder.

          Nothing in this Article 10 shall apply to claims of, or payments to,
the Trustee under or pursuant to Section 7.07.

          SECTION 10.14.  ARTICLE 10 APPLICABLE TO PAYING AGENTS AND CONVERSION
AGENTS.  In case at any time any Paying Agent or Conversion Agent other than the
Trustee shall have been appointed


                                      -64-


by the Company and be then acting hereunder, the term "Trustee" as used in this
Article 10 shall in such case (unless the context otherwise requires) be
construed as extending to and including such Paying Agent or Conversion Agent,
as the case may be, within its meaning as fully for all intents and purposes as
if such Paying Agent or Conversion Agent, as the case may be, were named in this
Article 10 in addition to or in place of the Trustee; PROVIDED, HOWEVER, that
Sections 10.10 and 10.12 shall not apply to the Company or any Affiliate of the
Company if it or such Affiliate acts as Paying Agent or Conversion Agent, as the
case may be.


                                   ARTICLE 11

                                   CONVERSION

          SECTION 11.01.  CONVERSION PRIVILEGE.  A Holder of a Security may
convert such Security into Common Shares at any time during the period stated in
paragraph 9 of the Securities.  The number of Common Shares issuable upon
conversion of a Security per $ 1,000 of Principal Amount at Maturity thereof
(the "CONVERSION RATE") shall be that set forth in paragraph 9 in the
Securities, subject to adjustment as herein set forth.  Such right of Holders to
convert Securities into Common Shares is subject to the Company's right to elect
to pay a Holder surrendering a Security pursuant to this Article 11 the amount
of cash set forth in the next succeeding sentence, in lieu of delivering such
Common Shares; provided that if such payment of cash is not allowed pursuant to
the provisions of the Indenture or otherwise, the Company (or the Standby Share
Deliverer in accordance with terms of Section 11.19) shall deliver Common Shares
(and the Company shall deliver cash in lieu of fractional Common Shares) in
accordance with this Article 11, whether or not the Company has delivered its
notice of whether such Security shall be converted into Common Shares or cash
pursuant to Section 11.02.  The amount of cash to be paid in lieu of Common
Shares pursuant to such election by the Company per $1,000 Principal Amount at
Maturity of a Security upon conversion of such Security shall be equal to the
Sale Price of a Common Share on the trading day immediately prior to the
Conversion Date multiplied by the Conversion Rate in effect on such trading day,
as adjusted in accordance with this Article 11 and as further adjusted to
reflect adjustments thereto calculated pursuant to the terms of this Article 11
with respect to events (i) that give rise to an adjustment to the Conversion
Rate pursuant to the terms of this Article 11 which has not become effective on
or prior to such trading day and (ii) with respect to which the Time of
Determination has occurred.

          The Company shall not pay cash in lieu of delivering Common Shares
upon the conversion of any Security pursuant to the


                                      -65-


terms of this Article 11 (other than cash in lieu of fractional shares pursuant
to Section 11.03) (i) if there has occurred (prior to, on or after, as the case
may be, the Conversion Date or the date on which the Company delivers its notice
of whether such Security shall be converted into Common Shares or cash pursuant
to Section 11.02) and is continuing an Event of Default (other than a default in
such payment on such Securities) and (ii) unless the Common Shares are listed or
admitted to trading on a United States national or regional securities exchange
or reported on The Nasdaq Stock Market.

          A Holder may convert a portion of the Principal Amount at Maturity of
a Security if the portion is $1,000 or an integral multiple of $1,000.
Provisions of this Indenture that apply to conversion of all of a Security also
apply to conversion of a portion of a Security.

          "QUOTED PRICE" means, for any given day, the last reported per share
sale price (or, if no sale price is reported, the average of the bid and ask
prices or, if more than one in either case, the average of the average bid and
average ask prices) on such day of the Common Shares as reported in the
composite transactions for the principal United States securities exchange upon
which the Common Shares are listed, or, if the Common Shares are not listed on a
United States national or regional securities exchange, as quoted on The Nasdaq
Stock Market or by the National Quotation Bureau Incorporated.  In the absence
of such quotations, the Company shall be entitled to determine the Quoted Price
on the basis of such quotations as it considers appropriate.

          "AVERAGE QUOTED PRICE" means the average of the Quoted Prices of the
Common Shares for the shortest of

          (i)  30 consecutive trading days ending on the last full trading day
     prior to the Time of Determination with respect to the rights, warrants or
     options or distribution in respect of which the Average Quoted Price is
     being calculated, or

          (ii)  the period (x) commencing on the date next succeeding the first
     public announcement of (a) the issuance of rights, warrants or options or
     (b) the distribution, in each case, in respect of which the Average Quoted
     Price is being calculated and (y) proceeding through the last full trading
     day prior to the Time of Determination with respect to the rights, warrants
     or options or distribution in respect of which the Average Quoted Price is
     being calculated (excluding days within such period, if any, which are not
     trading days), or


                                      -66-


          (iii)  the period, if any, (x) commencing on the date next succeeding
     the Ex-Dividend Time with respect to the next preceding (a) issuance of
     rights, warrants or options or (b) distribution, in each case, for which an
     adjustment is required by the provisions of Section 11.06(4), 11.07 or
     11.08 and (y) proceeding through the last full trading day prior to the
     Time of Determination with respect to the rights, warrants or options or
     distribution in respect of which the Average Quoted Price is being
     calculated (excluding days within such period, if any, which are not
     trading days).

          In the event that the Ex-Dividend Time (or in the case of a
subdivision, combination or reclassification, the effective date with respect
thereto) with respect to a dividend, subdivision, combination or
reclassification to which Section 11.06(1), (2), (3) or (5) applies occurs
during the period applicable for calculating "Average Quoted Price" pursuant to
the definition in the preceding sentence, "Average Quoted Price" shall be
calculated for such period in a manner determined by the Board of Directors to
reflect the impact of such dividend, subdivision, combination or
reclassification on the Quoted Price of the Common Shares during such period.

          "TIME OF DETERMINATION" means the time and date of the earlier of (i)
the determination of shareholders entitled to receive rights, warrants or
options or a dividend or distribution, in each case, to which Section 11.06,
11.07 or 11.08 applies and (ii) the time ("EX-DIVIDEND TIME") immediately prior
to the commencement of "ex-dividend" trading for such rights, warrants or
options or dividend or distribution on the American Stock Exchange or such other
national or regional exchange or market on which the Common Shares are then
listed or quoted.

          SECTION 11.02.  CONVERSION PROCEDURE.  To convert a Security a Holder
must satisfy the requirements in paragraph 9 of the Securities.  The date on
which the Holder satisfies all those requirements is the conversion date (the
"CONVERSION DATE").  Within two Business Days after the Conversion Date, the
Company shall deliver to the Holder, through the Conversion Agent, written
notice of whether Common Shares (and cash in lieu of fractional shares) or cash
shall be delivered to such Holder in connection with such conversion.  If Common
Shares are to be delivered to the Holder pursuant to a Common Share Delivery
Arrangement, such notice shall inform the Holder that the delivery of Common
Shares in connection with such conversion may constitute a taxable event to such
Holder because the Common Shares are being delivered by the Standby Share
Deliverer.  If the Company shall have notified the Holder that Common Shares
(and cash in lieu of fractional shares) shall be delivered, the Company (except
as set forth in Section 11.19 in connection with


                                      -67-


a conversion to be executed pursuant to a Common Share Delivery Arrangement)
shall deliver to the Holder no later than the fifth Business Day following such
Conversion Date, through the Conversion Agent, a certificate for the number of
full Common Shares to be delivered upon conversion and cash in lieu of any
fractional share determined pursuant to Section 11.03.  If the Company shall
have notified the Holder that such Security shall be converted into cash, the
Company shall deliver to the Holder surrendering such Securities, through the
Conversion Agent, the amount of cash payable upon such conversion no later than
the fifth Business Day following such Conversion Date.  If (i) the Company shall
have notified the Holder that such Security shall be converted into cash, (ii)
such payment of cash is not allowed pursuant to the provisions of the Indenture
or otherwise and (iii) the Company has arranged for such conversion to be
executed pursuant to a Common Share Delivery Arrangement, the Company shall
promptly (but no later than five Business Days after the Conversion Date)
deliver to the Holder, through the Conversion Agent, written notice that Common
Shares (and cash in lieu of fractional shares) shall be delivered to such Holder
in connection with such Conversion and that the delivery of Common Shares in
connection with such Conversion may constitute a taxable event to such Holder
because the Common Shares are being delivered by the Standby Share Deliverer.
The person in whose name the certificate described in the third preceding
sentence is registered shall be treated as a shareholder of record on and after
the Conversion Date; PROVIDED, HOWEVER, that no surrender of a Security on any
date when the share transfer books of the Company shall be closed shall be
effective to constitute the person or persons entitled to receive the Common
Shares upon such conversion as the record holder or holders of such Common
Shares on such date, but such surrender shall be effective to constitute the
person or persons entitled to receive such Common Shares as the record holder or
holders thereof for all purposes at the close of business on the next succeeding
day on which such share transfer books are open; such conversion shall be at the
Conversion Rate in effect on the date that such Security shall have been
surrendered for conversion, as if the share transfer books of the Company had
not been closed.  Upon conversion of a Security, such person shall no longer be
a Holder of such Security.

          No payment or adjustment will be made for dividends on, or other
distributions with respect to, any Common Shares except as provided in this
Article 11.  On conversion of a Security (other than a conversion executed
pursuant to delivery of Common Shares (and cash in lieu of fractional shares) by
the Standby Share Deliverer pursuant to a Common Share Delivery Arrangement),
that portion of accrued Original Issue Discount attributable to the period from
the Issue Date of the Security through the Conversion Date with respect to the
converted Security shall not be cancelled, extinguished or forfeited, but rather
shall be


                                      -68-


deemed to be paid in full to the Holder thereof through delivery of the Common
Shares (together with the cash payment, if any, in lieu of any fractional Common
Shares) or of cash, as the case may be, in exchange for the Security being
converted pursuant to the provisions hereof; and, if the Company delivers Common
Shares (and cash in lieu of fractional shares) upon conversion of Securities,
the fair market value of such Common Shares (together with any such cash payment
in lieu of any fractional Common Shares) shall be treated as issued, to the
extent thereof, first in exchange for Original Issue Discount accrued through
the Conversion Date, and the balance, if any, of such fair market value of such
Common Shares (and any such cash payment) shall be treated as issued in exchange
for the Issue Price of the Security being converted pursuant to the provisions
hereof.

          If the Holder converts more than one Security at the same time, the
number of Common Shares deliverable or the amount of cash to be paid, as the
case may be, upon the conversion shall be based on the total Principal Amount at
Maturity of the Securities converted.

          Upon surrender of a Security that is converted in part, the Company
shall execute, and the Trustee shall authenticate and deliver to the Holder, a
new Security in an authorized denomination equal in Principal Amount at Maturity
to the unconverted portion of the Security surrendered.

          If the last day on which a Security may be converted is not a Business
Day, the Security may be surrendered on the next succeeding day that is a
Business Day.

          SECTION 11.03.  FRACTIONAL SHARES.  Fractional Common Shares will not
be delivered upon conversion of a Security.  Instead, the Company (or the
Standby Share Deliverer, through the Conversion Agent, in the case of a Common
Share Delivery Arrangement) will deliver cash for the current market value of
such fractional share.  The current market value of a fractional Common Share
shall be determined, to the nearest 1/1,000th of a Common Share, by multiplying
the Quoted Price, on the last trading day prior to the Conversion Date, of a
full Common Share by the fractional amount and rounding the product to the
nearest whole cent.

          SECTION 11.04.  TAXES ON CONVERSION.  If a Holder converts a Security,
the Company shall pay any documentary, stamp or similar issue or transfer tax
due on the issue of Common Shares upon the conversion.  However, the Holder
shall pay any such tax which is due because the Holder requests the Common
Shares to be issued in a name other than the Holder's name.  The Conversion
Agent may refuse to deliver the certificates representing the Common Shares
being issued in a name other than the Holder's name until the Conversion Agent
receives a sum


                                      -69-


sufficient to pay any tax which will be due because the Common Shares are to be
issued in a name other than the Holder's name.  Nothing herein shall preclude
any tax withholding required by law or regulations.

          SECTION 11.05.  COMPANY TO PROVIDE COMMON SHARES.  The Company shall,
prior to issuance of any Securities under this Article 11, and from time to time
as may be necessary, reserve out of its authorized but unissued Common Shares a
sufficient number of Common Shares to permit the conversion of all of the
outstanding Securities for Common Shares (assuming no conversions are to be
executed pursuant to a Common Share Delivery Arrangement).

          Except in the case of Common Shares delivered by the Standby Share
Deliverer pursuant to a Common Share Delivery Arrangement, all Common Shares
delivered upon conversion of the Securities shall be newly issued Common Shares
or treasury Common Shares.  All Common Shares delivered upon conversion of the
Securities shall be duly and validly issued and fully paid and nonassessable,
shall not be subject to nor violate any preemptive rights and shall be free of
any lien or adverse claim.

          The Company will endeavor promptly to comply with all Federal and
state securities laws regulating the offer and delivery of Common Shares upon
conversion of Securities, if any, and will list or cause to have quoted such
Common Shares on each national securities exchange or in the over-the-counter
market or such other market on which the Common Shares are then listed or
quoted.

          SECTION 11.06.  ADJUSTMENT FOR CHANGE IN CAPITAL STOCK.  If, after the
Issue Date of the Securities, the Company:

          (1)  pays a dividend or makes a distribution on its Common Shares in
     Common Shares;

          (2)  subdivides its outstanding Common Shares into a greater number of
     Common Shares;

          (3)  combines its outstanding Common Shares into a smaller number of
     Common Shares;

          (4)  pays a dividend or makes a distribution on its Common Shares in
     shares of its Capital Stock (other than Common Shares or rights, warrants
     or options for its Capital Stock); or

          (5)  issues by reclassification of its Common Shares any shares of its
     Capital Stock (other than rights, warrants or options for its Capital
     Stock),


                                      -70-


then the conversion privilege and the Conversion Rate in effect immediately
prior to such action shall be adjusted so that the Holder of a Security
thereafter converted may receive the number of shares of Capital Stock of the
Company which such Holder would have owned immediately following such action if
such Holder had converted the Security immediately prior to such action.

          The adjustment shall become effective immediately after the record
date in the case of a dividend or distribution and immediately after the
effective date in the case of a subdivision, combination or reclassification.

          If after an adjustment a Holder of a Security upon conversion of such
Security may receive shares of two or more classes of Capital Stock of the
Company, the Conversion Rate shall thereafter be subject to adjustment upon the
occurrence of an action taken with respect to any such class of Capital Stock as
is contemplated by this Article 11 with respect to the Common Shares, on terms
comparable to those applicable to Common Shares in this Article 11.

          SECTION 11.07.  ADJUSTMENT FOR RIGHTS ISSUE.  If after the Issue Date
of the Securities, the Company distributes any rights, warrants or options to
all holders of its Common Shares entitling them, for a period expiring within 60
days after the record date for such distribution, to purchase Common Shares at a
price per Common Share less than the Quoted Price as of the Time of
Determination, the Conversion Rate shall be adjusted in accordance with the
formula:

          R'  =  R x      (O + N)
                      ---------------
                      (O + (N x P)/M)

     where:

     R' =the adjusted Conversion Rate.

     R  =the current Conversion Rate.

     O  = the number of Common Shares outstanding on the record date for the
          distribution to which this Section 11.07 is being applied.

     N  = the number of additional Common Shares offered pursuant to the
          distribution.

     P  = the exercise price per share of the additional Common Shares.

     M  = the Average Quoted Price, MINUS, in the case of (i) a distribution to
          which Section 11.06(4) applies or (ii) a distribution to which Section
          11.08 applies, for


                                      -71-


          which, in each case, (x) the record date shall occur on or before the
          record date for the distribution to which this Section 11.07 applies
          and (y) the Ex-Dividend Time shall occur on or after the date of the
          Time of Determination for the distribution to which this Section 11.07
          applies, the fair market value (on the record date for the
          distribution to which this Section 11.07 applies) of the

          (1) Capital Stock of the Company distributed in respect of each Common
          Share in such Section 11.06(4) distribution and

          (2) assets of the Company or debt securities or any rights, warrants
          or options to purchase securities of the Company distributed in
          respect of each Common Share in such Section 11.08 distribution.

     The Board of Directors shall determine fair market values for the purposes
     of this Section 11.07.

          The adjustment shall become effective immediately after the record
date for the determination of shareholders entitled to receive the rights,
warrants or options to which this Section 11.07 applies.  If all of the Common
Shares subject to such rights, warrants or options have not been issued when
such rights, warrants or options expire, then the Conversion Rate shall promptly
be readjusted to the Conversion Rate which would then be in effect had the
adjustment upon the issuance of such rights, warrants or options been made on
the basis of the actual number of Common Shares issued upon the exercise of such
rights, warrants or options.

          No adjustment shall be made under this Section 11.07 if the
application of the formula stated above in this Section 11.07 would result in a
value of R' that is equal to or less than the value of R.

          SECTION 11.08.  ADJUSTMENT FOR OTHER DISTRIBUTIONS.  If, after the
Issue Date of the Securities, the Company distributes to all holders of its
Common Shares any of its assets, or debt securities or any rights, warrants or
options to purchase securities of the Company (including securities or cash, but
excluding (x) distributions of Capital Stock referred to in Section 11.06 and
distributions of rights, warrants or options referred to in Section 11.07 and
(y) cash dividends or other cash distributions that are paid out of consolidated
current net earnings or earnings retained in the business as shown on the books
of the Company unless such cash dividends or other cash distributions are
Extraordinary Cash Dividends) the Conversion Rate shall be adjusted, subject to
the provisions of the last paragraph of this Section 11.08, in accordance with
the formula:


                                      -72-


                          R'  =  R x  M
                                      -
                                     M-F

where:

     R' =the adjusted Conversion Rate.

     R  =the current Conversion Rate.

     M  = the Average Quoted Price, MINUS, in the case of a distribution to
          which Section 11.06(4) applies, for which (i) the record date shall
          occur on or before the record date for the distribution to which this
          Section 11.08 applies and (ii) the Ex-Dividend Time shall occur on or
          after the date of the Time of Determination for the distribution to
          which this Section 11.08 applies, the fair market value (on the record
          date for the distribution to which this Section 11.08 applies) of any
          Capital Stock of the Company distributed in respect of each Common
          Share in such Section 11.06(4) distribution.

     F  = the fair market value (on the record date for the distribution to
          which this Section 11.08 applies) of the assets, securities, rights,
          warrants or options to be distributed in respect of each Common Share
          in the distribution to which this Section 11.08 is being applied
          (including, in the case of cash dividends or other cash distributions
          giving rise to an adjustment, all such cash distributed concurrently).

     The Board of Directors shall determine fair market values for the purposes
     of this Section 11.08.

          The adjustment shall become effective immediately after the record
date for the determination of shareholders entitled to receive the distribution
to which this Section 11.08 applies.

          For purposes of this Section 11.08, the term "EXTRAORDINARY CASH
DIVIDEND" shall mean any cash dividend with respect to the Common Shares the
amount of which, together with the aggregate amount of cash dividends on the
Common Shares to be aggregated with such cash dividend in accordance with the
provisions of this paragraph, equals or exceeds the threshold percentages set
forth in item (i) or (ii) below:

          (i)  If, upon the date prior to the Ex-Dividend Time with respect to a
     cash dividend on the Common Shares, the aggregate amount of such cash
     dividend together with the amounts of all cash dividends on the Common
     Shares with Ex-Dividend Times occurring in the 85 consecutive day period
     ending on the date prior to the Ex-Dividend Time with respect to the cash
     dividend to which this provision is being applied equals or exceeds on a
     per share basis 12.5% of the average of the Quoted Prices during the period
     beginning on the date after the first such Ex-Dividend Time in such period
     and ending on the date prior to the Ex-Dividend Time with


                                      -73-


     respect to the cash dividend to which this provision is being applied
     (except that if no other cash dividend has had an Ex-Dividend Time
     occurring in such period, the period for calculating the average of the
     Quoted Prices shall be the period commencing 85 days prior to the date
     prior to the Ex-Dividend Time with respect to the cash dividend to which
     this provision is being applied), such cash dividend together with each
     other cash dividend with an Ex-Dividend Time occurring in such 85 day
     period shall be deemed to be an Extraordinary Cash Dividend and for
     purposes of applying the formula set forth above in this Section 11.08, the
     value of "F" shall be equal to (w) the aggregate amount of such cash
     dividend together with the amounts of the other cash dividends with
     Ex-Dividend Times occurring in such period MINUS (x) the aggregate amount
     of such other cash dividends with Ex-Dividend Times occurring in such
     period for which a prior adjustment in the Conversion Rate was previously
     made under this Section 11.08.

          (ii)  If, upon the date prior to the Ex-Dividend Time with respect to
     a cash dividend on the Common Shares, the aggregate amount of such cash
     dividend together with the amounts of all cash dividends on the Common
     Shares with Ex-Dividend Times occurring in the 365 consecutive day period
     ending on the date prior to the Ex-Dividend Time with respect to the cash
     dividend to which this provision is being applied equals or exceeds on a
     per share basis 25% of the average of the Quoted Prices during the period
     beginning on the date after the first such Ex-Dividend Time in such period
     and ending on the date prior to the Ex-Dividend Time with respect to the
     cash dividend to which this provision is being applied (except that if no
     other cash dividend has had an Ex-Dividend Time occurring in such period,
     the period for calculating the average of the Quoted Prices shall be the
     period commencing 365 days prior to the date prior to the Ex-Dividend Time
     with respect to the cash dividend to which this provision is being
     applied), such cash dividend together with each other cash dividend with an
     Ex-Dividend Time occurring in such 365 day period shall be deemed to be an
     Extraordinary Cash Dividend and for purposes of applying the formula set
     forth above in this Section 11.08, the value of "F" shall be equal to (y)
     the aggregate amount of such cash dividend together with the amounts of the
     other cash dividends with Ex-Dividend Times occurring in such period MINUS
     (z) the aggregate amount of such other cash dividends with Ex-Dividend
     Times occurring in such period for which a


                                      -74-


     prior adjustment in the Conversion Rate was previously made under this
     Section 11.08.

          In making the determinations required by items (i) and (ii) above, the
     amount of cash dividends paid on a per share basis and the average of the
     Quoted Prices, in each case during the period specified in item (i) or (ii)
     above, as applicable, shall be appropriately adjusted to reflect the
     occurrence during such period of any event described in Section 11.06.

          In the event that, with respect to any distribution to which this
Section 11.08 would otherwise apply, the difference "M-F" as defined in the
above formula is less than $1.00 or "F" is equal to or greater than "M", then
the adjustment provided by this Section 11.08 shall not be made and in lieu
thereof the provisions of Section 11.14 shall apply to such distribution.

          SECTION 11.09.  WHEN ADJUSTMENT MAY BE DEFERRED.  No adjustment in the
Conversion Rate need be made unless the adjustment would require an increase or
decrease of at least 1% in the Conversion Rate.  Any adjustments that are not
made shall be carried forward and taken into account in any subsequent
adjustment.

          All calculations under this Article 11 shall be made to the nearest
cent or to the nearest 1/1,000th of a share, as the case may be.

          SECTION 11.10.  WHEN NO ADJUSTMENT REQUIRED.  No adjustment need be
made for a transaction referred to in Section 11.06, 11.07, 11.08 or 11.14 if
Securityholders are to participate in the transaction on a basis and with notice
that the Board of Directors determines to be fair and appropriate in light of
the basis and notice on which holders of Common Shares participate in the
transaction.  Such participation by Securityholders may include participation
upon conversion provided that an adjustment shall be made at such time as the
Securityholders are no longer entitled to participate.

          No adjustment need be made for rights to purchase Common Shares
pursuant to a Company plan for reinvestment of dividends or interest.

          No adjustment need be made for a change in the par value or no par
value of the Common Shares.

          To the extent the Securities become convertible pursuant to the terms
of Section 11.06, 11.07, 11.08 or 11.14, no adjustment need be made thereafter
as to the cash.  Interest will not accrue on the cash.


                                      -75-


          SECTION 11.11.  NOTICE OF ADJUSTMENT.  Whenever the Conversion Rate is
adjusted, the Company shall promptly mail to Securityholders a notice of the
adjustment.  The Company shall file with the Trustee and the Conversion Agent
such notice and a certificate from the Company's independent public accountants
briefly stating the facts requiring the adjustment and the manner of computing
it.  The certificate shall be conclusive evidence that the adjustment is
correct.  Neither the Trustee nor any Conversion Agent shall be under any duty
or responsibility with respect to any such certificate except to exhibit the
same to any Holder desiring inspection thereof.

          SECTION 11.12.  VOLUNTARY INCREASE.  The Company from time to time may
increase the Conversion Rate by any amount for any period of time.  Whenever the
Conversion Rate is increased, the Company shall mail to Securityholders and file
with the Trustee and the Conversion Agent a notice of the increase.  The Company
shall mail the notice at least 15 days before the date the increased Conversion
Rate takes effect.  The notice shall state the increased Conversion Rate and the
period it will be in effect.

          A voluntary increase of the Conversion Rate does not change or adjust
the Conversion Rate otherwise in effect for purposes of Section 11.06, 11.07 or
11.08.

          SECTION 11.13.  NOTICE OF CERTAIN TRANSACTIONS.  If:

          (1)  the Company takes any action that would require an adjustment in
     the Conversion Rate pursuant to Section 11.06, 11.07 or 11.08 (unless no
     adjustment is to occur pursuant to Section 11.10); or

          (2)  the Company takes any action that would require a supplemental
     indenture pursuant to Section 11.14; or

          (3)  there is a liquidation or dissolution of the Company;

then the Company shall mail to Securityholders and file with the Trustee and the
Conversion Agent a notice stating the proposed record date for a dividend or
distribution or the proposed effective date of a subdivision, combination,
reclassification, consolidation, merger, binding share exchange, transfer,
liquidation or dissolution.  The Company shall file and mail the notice at least
15 days before such date.  Failure to file or mail the notice or any defect in
it shall not affect the validity of the transaction.

          SECTION 11.14.  REORGANIZATION OF COMPANY; SPECIAL DISTRIBUTIONS.  If
the Company is a party to a transaction subject to Section 5.01 (other than a
sale of all or


                                      -76-


substantially all of the assets of the Company in a transaction in which the
holders of Common Shares immediately prior to such transaction do not receive
securities, cash or other assets of the Company or any other person) or a merger
or binding share exchange which reclassifies or changes its outstanding Common
Shares, the person obligated to deliver securities, cash or other assets upon
conversion of Securities shall enter into a supplemental indenture.  If the
issuer of securities deliverable upon conversion of Securities is an Affiliate
of the successor Company, that issuer shall join in the supplemental indenture.

          The supplemental indenture shall provide that the Holder of a Security
may convert it into the kind and amount of securities, cash or other assets
which such Holder would have received immediately after the consolidation,
merger, binding share exchange or transfer if such Holder had converted the
Security into Common Shares immediately before the effective date of the
transaction, assuming (to the extent applicable) that such Holder (i) was not a
constituent person or an Affiliate of a constituent person to such transaction;
(ii) made no election with respect to the type or types of consideration such
Holder would have received immediately after such transaction; and (iii) was
treated alike with the plurality of non-electing Holders.  The supplemental
indenture shall provide for adjustments which shall be as nearly equivalent as
may be practical to the adjustments provided for in this Article 11. The
successor Company shall mail to Securityholders a notice briefly describing the
supplemental indenture.

          If this Section applies, neither Section 11.06 nor 11.07 applies.

If the Company makes a distribution to all holders of its Common Shares of any
of its assets, or debt securities or any rights, warrants or options to purchase
securities of the Company that, but for the provisions of the last paragraph of
Section 11.08, would otherwise result in an adjustment in the Conversion Rate
pursuant to the provisions of Section 11.08, then, from and after the record
date for determining the holders of Common Shares entitled to receive the
distribution, a Holder of a Security that converts such Security into Common
Shares in accordance with the provisions of this Indenture shall upon such
conversion be entitled to receive, in addition to the Common Shares into which
the Security is convertible, the kind and amount of securities, cash or other
assets comprising the distribution that such Holder would have received if such
Holder had converted the Security into Common Shares immediately prior to the
record date for determining the holders of Common Shares entitled to receive the
distribution.

          SECTION 11.15.  COMPANY DETERMINATION FINAL.  Any determination that
the Company or the Board of Directors must


                                      -77-


make pursuant to Section 11.03, 11.06, 11.07, 11.08, 11.09, 11.10, 11.14 or
11.17 is conclusive.

          SECTION 11.16.  TRUSTEE'S ADJUSTMENT DISCLAIMER.  The Trustee has no
duty to determine when an adjustment under this Article 11 should be made, how
it should be made or what it should be.  The Trustee has no duty to determine
whether a supplemental indenture under Section 11.14 need be entered into or
whether any provisions of any supplemental indenture are correct.  The Trustee
shall not be accountable for and makes no representation as to the validity or
value of any securities or assets issued upon conversion of Securities.  The
Trustee shall not be responsible for the Company's failure to comply with this
Article 11.  Each Conversion Agent shall have the same protection under this
Section 11.16 as the Trustee.

          SECTION 11.17.  SIMULTANEOUS ADJUSTMENTS.  In the event that this
Article 11 requires adjustments to the Conversion Rate under more than one of
Sections 11.06(4), 11.07 or 11.08, and the record dates for the distributions
giving rise to such adjustments shall occur on the same date, then such
adjustments shall be made by applying, first, the provisions of Section 11.06,
second, the provisions of Section 11.08 and, third, the provisions of
Section 11.07.

          SECTION 11.18.  SUCCESSIVE ADJUSTMENTS.  After an adjustment to the
Conversion Rate under this Article 11, any subsequent event requiring an
adjustment under this Article 11 shall cause an adjustment to the Conversion
Rate as so adjusted.

          SECTION 11.19.  COMMON SHARE DELIVERY ARRANGEMENT.  Notwithstanding
any other provision contained in this Article 11 or paragraph 9 of the
Securities, in connection with the conversion of any Security, if a Holder
satisfies the conversion requirements in paragraph 9 of the Securities and the
Company notifies the Holder in accordance with Section 11.02 that Common Shares
shall be delivered to the Holder converting such Security in accordance with
Section 11.02 or if the Company has notified the Holder in accordance with
Section 11.02 that cash will be delivered to such Holder in connection with such
conversion and such payment of cash is not allowed pursuant to the provisions of
the Indenture or otherwise, rather than the Company delivering Common Shares to
such Holder, through the Conversion Agent, as contemplated by Section 11.02, the
Company may arrange by an agreement with the Standby Share Deliverer for the
Standby Share Deliverer to deliver Common Shares (and cash in lieu of fractional
shares) to such Holder, through the Conversion Agent, in accordance with the
procedures set forth in Section 11.02 and in the amounts calculated pursuant to
Section 11.01 and 11.03 (any such arrangement actually agreed to by the Company
and the Standby Share Deliverer with respect to a conversion of Securities is
referred to herein as a "COMMON SHARE DELIVERY


                                      -78-


ARRANGEMENT").  If the Standby Share Deliverer agrees to so act, (i) the Standby
Share Deliverer shall deliver to the Conversion Agent no later than the fifth
Business Day following the Conversion Date, for delivery to the Holder so
converting such Holder's Securities, the number of full Common Shares to be
delivered upon conversion (calculated pursuant to Section 11.01) and cash in
lieu of fractional shares (determined pursuant to Section 11.03) and (ii) the
Conversion Agent shall deliver to such Holder in accordance with Section 11.02,
no later than the close of business on the fifth Business Day following the
Conversion Date, a certificate for the number of full Common Shares to be
delivered upon conversion (calculated pursuant to Section 11.01) and cash in
lieu of fractional shares (determined pursuant to Section 11.03) and shall,
unless not required by the Securities Act, deliver to such Holder (on behalf of
the Company and the Standby Share Deliverer) a current prospectus covering such
Common Shares (copies of such prospectus to be prepared by the Company and
provided to the Conversion Agent by the Company for such delivery) at the same
time as the Conversion Agent delivers the Common Shares certificate referred to
in this clause (ii).  Upon such delivery of Common Shares (and cash in lieu of
fractional shares) by the Standby Share Deliverer to the Conversion Agent, the
Company shall execute and the Trustee shall authenticate and deliver to the
Standby Share Deliverer a new Security in an authorized denomination equal in
Principal Amount at Maturity to the Security (or portion thereof) being
converted by the Holder thereof in respect of which conversion the Standby Share
Deliverer has agreed to so act, and, upon delivery of such Common Shares to the
Conversion Agent, the Standby Share Deliverer shall be treated as the Holder of
such Security on and after the Conversion Date.  Such Security (or portion
thereof) so converted pursuant to a Common Share Delivery Arrangement shall not
cease to be outstanding, but shall remain outstanding (and retain all of its
conversion rights, including those set forth in this Article 11) with such
Standby Share Deliverer as the Holder thereof.  Notwithstanding anything to the
contrary contained in this Article 11, the obligation of the Company to deliver
Common Shares (and cash in lieu of fractional shares) or cash upon conversion in
accordance with this Article 11 shall be deemed to be satisfied and discharged
to the extent the Standby Share Deliverer delivers Common Shares (and cash in
lieu of fractional shares) in accordance with this Section 11.19 pursuant to a
Common Share Delivery Arrangement; provided, however, that any Security acquired
by the Standby Share Deliverer pursuant to a Common Share Delivery Arrangement
shall continue to have all of the conversion rights set forth herein applicable
to Securities.  If the Standby Share Deliverer defaults in its obligation to
deliver any Common Shares (or any cash in lieu of fractional shares) required to
be delivered to the Conversion Agent pursuant to a Common Share Delivery
Arrangement, the Conversion Agent shall promptly notify the Company of the
Standby Share Deliver's failure to deliver such Common Shares (or such cash in
lieu of


                                      -79-


fractional shares), and the Company shall, within one Business Day of receipt of
such notice from the Conversion Agent, deliver to such Holder, through the
Conversion Agent, cash (if allowed pursuant to the Indenture and otherwise) in
the amount calculated pursuant to Section 11.01 or the full number of Common
Shares (and the full amount of cash in lieu of fractional shares) that were
required to be delivered to such Holder by the Standby Share Deliverer pursuant
to a Common Share Delivery Arrangement regardless of the number of such Common
Shares that were not so delivered, and the Company shall, in the case of payment
with Common Shares, at the time of delivery of such Common Shares (and such cash
in lieu of fractional shares), deliver to such Holder, through the Conversion
Agent, written notice that there may be no taxable event to such Holder with
respect to those Common Shares delivered by the Company to such Holder;
provided, that, in the circumstances described in this sentence, (A) any
Security so converted will not remain outstanding and will be treated in all
respects as if it had been converted otherwise than pursuant to a Common Share
Delivery Arrangement and the Standby Share Deliverer will not become the Holder
of the Security so converted, and (B) the Conversion Agent shall promptly
deliver back to the Standby Share Deliverer any Common Shares (and cash in lieu
of fractional shares) previously delivered by the Standby Share Deliverer in
connection with such conversion by such Holder and; provided, further, that if
such failure by the Standby Share Deliverer to deliver the full number of Common
Shares (or the full amount of cash in lieu of fractional shares) deliverable
upon conversion relates to conversions by more than one Holder of Securities
with the same Conversion Date, any Common Shares (and any cash in lieu of
fractional shares) delivered by the Standby Share Deliverer shall be delivered
to such Holders so as to maximize the number of Securities that may be so
converted in accordance with the terms of a Common Share Delivery Arrangement.
Except as expressly set forth herein, the provisions of this Article 11 shall
apply to a conversion executed pursuant to the delivery of Common Shares by the
Standby Share Deliverer pursuant to the terms of a Common Share Delivery
Arrangement as if such Security had been converted into Common Shares in
accordance with this Article 11.

     "STANDBY SHARE DELIVERER" means the person that enters into an agreement
with the Company and the Conversion Agent pursuant to which the Company may
request such person to deliver Common Shares in connection with the conversion
of Securities in accordance with this Section 11.19.  The initial Standby Share
Deliverer shall be Merrill Lynch & Co. or any Affiliate of Merrill Lynch & Co.
so agreeing to act or any successors to Merrill Lynch & Co. or any such
Affiliate.


                                      -80-


                                   ARTICLE 12

                                  MISCELLANEOUS

          SECTION 12.01.  TRUST INDENTURE ACT CONTROLS.  If any provision of
this Indenture limits, qualifies, or conflicts with another provision which is
required to be included in this Indenture by the TIA, the required provision
shall control.

          SECTION 12.02.  NOTICES.  Any request, demand, authorization, notice,
waiver, consent or communication shall be in writing and delivered in person or
mailed by first-class mail, postage prepaid, addressed as follows or transmitted
by facsimile transmission (confirmed by guaranteed overnight courier) to the
following facsimile numbers:

     if to the Company:

          United States Cellular Corporation
          8410 West Bryn Mawr, Suite 700
          Chicago, IL  60631-3486

          Telephone No. (312) 399-8900
          Facsimile No. (312) 399-8936

          Attention:  President

     with copies to:

          Telephone and Data Systems, Inc.
          30 North LaSalle Street, Suite 4000
          Chicago, IL  60602

          Telephone No. (312) 630-1900
          Facsimile No. (312) 630-1908

          Attention:  LeRoy T. Carlson, Jr.

          and

          Sidley & Austin
          1 First National Plaza
          Chicago, IL  60603

          Telephone No. (312) 853-7000
          Facsimile No. (312) 853-7036

          Attention:  Michael G. Hron


                                      -81-


     if to the Trustee:

          Harris Trust and Savings Bank
          311 West Monroe Street
          12th Floor
          Chicago, Illinois  60606

          Telephone No.:  (312) 461-2533
          Facsimile No. :  (312) 461-3525

          Attention: Indenture Trust Division

          The Company or the Trustee by notice given to the other in the manner
provided above may designate additional or different addresses for subsequent
notices or communications.

          Any notice or communication given to a Securityholder shall be mailed
to the Securityholder, by first-class mail, postage prepaid, at the
Securityholder's address as it appears on the registration books of the
Registrar and shall be sufficiently given if so mailed within the time
prescribed.

          Failure to mail a notice or communication to a Securityholder or any
defect in it shall not affect its sufficiency with respect to other
Securityholders.  If a notice or communication is mailed in the manner provided
above, it is duly given, whether or not received by the addressee.

          If the Company mails a notice or communication to the Securityholders,
it shall mail a copy to the Trustee and each Registrar, Paying Agent, Conversion
Agent or co-registrar.

          SECTION 12.03.  COMMUNICATION BY HOLDERS WITH OTHER HOLDERS.
Securityholders may communicate pursuant to TIA Section 312(b) with other
Securityholders with respect to their rights under this Indenture or the
Securities.  The Company, the Trustee, the Registrar, the Paying Agent, the
Conversion Agent and anyone else shall have the protection of TIA Section
312(c).

          SECTION 12.04.  CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.
Upon any request or application by the Company to the Trustee to take any action
under this Indenture, the Company shall furnish to the Trustee:

          (1)  an Officers' Certificate stating that, in the opinion of the
     signers, all conditions precedent, if any, provided for in this Indenture
     relating to the proposed action have been complied with; and

          (2)  an Opinion of Counsel stating that, in the opinion of such
     counsel, all such conditions precedent have been complied with.


                                      -82-


          SECTION 12.05.  STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.  Each
Officers' Certificate or Opinion of Counsel with respect to compliance with a
covenant or condition provided for in this Indenture shall include:

          (1)  a statement that each person making such Officers' Certificate or
     Opinion of Counsel has read such covenant or condition;

          (2)  a brief statement as to the nature and scope of the examination
     or investigation upon which the statements or opinions contained in such
     Officers' Certificate or Opinion of Counsel are based;

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

          (4)  a statement that, in the opinion of such person, such covenant or
     condition has been complied with.

          SECTION 12.06.  SEPARABILITY CLAUSE.  In case any provision in this
Indenture or in the Securities 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 12.07.  RULES BY TRUSTEE, PAYING AGENT, CONVERSION AGENT AND
REGISTRAR.  The Trustee may make reasonable rules for action by or a meeting of
Securityholders.  The Registrar, Conversion Agent and the Paying Agent may make
reasonable rules for their functions.

          SECTION 12.08.  GOVERNING LAW.  THE LAWS OF THE STATE OF NEW YORK
SHALL GOVERN THIS INDENTURE AND THE SECURITIES.

          SECTION 12.09.  NO RECOURSE AGAINST OTHERS.  A director, officer,
employee or stockholder, as such, of the Company shall not have any liability
for any obligations of the Company under the Securities or this Indenture or for
any claim based on, in respect of or by reason of such obligations or their
creation.  By accepting a Security, each Securityholder shall waive and release
all such liability.  The waiver and release shall be part of the consideration
for the issue of the Securities.

          SECTION 12.10.  SUCCESSORS.  All agreements of the Company in this
Indenture and the Securities shall bind its successor.  All agreements of the
Trustee in this Indenture shall bind its successor.


                                      -83-


          SECTION 12.11.  MULTIPLE 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. One signed copy is enough to prove
this Indenture.


                                      -84-



     IN WITNESS WHEREOF, the undersigned, being duly authorized, have executed
this Indenture on behalf of the respective parties hereto as of the date first
above written.

                          UNITED STATES CELLULAR CORPORATION


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

Attest:



- ----------------------------
Title:


[SEAL]




                          HARRIS TRUST AND SAVINGS BANK



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

Attest:



- -------------------------
Title:

[SEAL]






                    [Signature page for the LYONs Indenture]


                                      -85-


                                    EXHIBIT A

                             [FORM OF FACE OF LYON]


                       UNITED STATES CELLULAR CORPORATION

                      Liquid Yield Option-TM- Note due 2015
                           (Zero Coupon-Subordinated)


Number
Issue Date:  __________ __, 1995     Original Issue Discount: $
Issue Price:  $                      (for each $1,000 Principal
(for each $1,000 Principal           Amount at Maturity)
Amount at Maturity)

    UNITED STATES CELLULAR CORPORATION, a Delaware corporation, promises to pay
to _________ or registered assigns, the Principal Amount at Maturity of
__________ Dollars on ___________, 2015.

    This Security shall not bear interest except as specified on the other side
of this Security.  Original Issue Discount will accrue as specified on the other
side of this Security.  This Security is convertible as specified on the other
side of this Security.

    Additional provisions of this Security are set forth on the other side of
this Security.


                          UNITED STATES CELLULAR CORPORATION



[SEAL]                    By
                             --------------------------------
                             Title:


Attest:



- ----------------------
Title:


                                       A-1


TRUSTEE'S CERTIFICATE OF
  AUTHENTICATION

HARRIS TRUST AND SAVINGS BANK

as Trustee, certifies that this
is one of the Securities referred
to in the within-mentioned Indenture.



By
   -------------------------
   Authorized Signatory

Dated: _________________________











- ------------------------
- -TM- Trademark of Merrill Lynch & Co., Inc.


                                       A-2


                         [FORM OF REVERSE SIDE OF LYON]

                      Liquid Yield Option-TM- Note Due 2015
                           (Zero Coupon-Subordinated)


1.  INTEREST.

    This Security shall not bear interest, except that if the Principal Amount
at Maturity hereof or any portion of such Principal Amount at Maturity is not
paid when due (whether upon acceleration pursuant to Section 6.02 of the
Indenture, upon the date set for payment of the Redemption Price pursuant to
paragraph 5 hereof, upon the date set for payment of the Purchase Price or
Change in Control Purchase Price pursuant to paragraph 6 hereof or upon the
Stated Maturity of this Security) or if cash or Common Shares in respect of a
conversion of this Security in accordance with the terms of Article 11 of the
Indenture is not paid or delivered, as the case may be, when due, then in each
such case the overdue amount shall, to the extent permitted by law, bear
interest at the rate of ____% per annum, compounded semi-annually, which
interest shall accrue from the date such overdue amount was originally due
through the date payment of such amount, including interest thereon, has been
made or duly provided for.  All such interest shall be payable on demand.  The
accrual of such interest on overdue amounts shall be in lieu of, and not in
addition to, the continued accrual of Original Issue Discount.

    Original Issue Discount (the difference between the Issue Price and the
Principal Amount at Maturity of the Security), in the period during which a
Security remains outstanding, shall accrue at ____% per annum, on a semiannual
bond equivalent basis using a 360-day year composed of twelve 30-day months,
from the Issue Date of this Security.

2.  METHOD OF PAYMENT.

    Subject to the terms and conditions of the Indenture, the Company will make
payments in respect of Redemption Prices, Purchase Prices, Change in Control
Purchase Prices and at Stated Maturity to Holders who surrender Securities to a
Paying Agent appointed to collect such payments in respect of the Securities.
The Company will pay cash amounts in money of the United States that at the time
of payment is legal tender for payment of public and private debts.  However,
the Company may make such cash payments by check payable in such money.




- ------------------------
- -TM- Trademark of Merrill Lynch & Co., Inc.


                                       A-3


3.  PAYING AGENT, CONVERSION AGENT AND REGISTRAR.

         Initially, Harris Trust and Savings Bank (the "TRUSTEE"), will act as
Paying Agent, Conversion Agent and Registrar. The Company may appoint and change
any Paying Agent, Conversion Agent, Registrar or co-registrar without notice,
other than notice to the Trustee except that the Company will maintain at least
one office or agency of the Paying Agent, Conversion Agent and Registrar in the
State of New York, City of New York, Borough of Manhattan.  The Company or any
of its Subsidiaries or any of their Affiliates may act as Paying Agent,
Conversion Agent, Registrar or co-registrar.

4.  INDENTURE.

    The Company issued the Securities under an Indenture dated as of
_____________, 1995 (the "INDENTURE"), between the Company and the Trustee.  The
terms of the Securities include those stated in the Indenture and those made
part of the Indenture by reference to the Trust Indenture Act of 1939 (the
"TIA").  Capitalized terms used herein and not defined herein have the meanings
ascribed thereto in the Indenture.  The Securities are subject to all such
terms, and Securityholders are referred to the Indenture and the TIA for a
statement of those terms.

    The Securities are general unsecured obligations of the Company limited to
$_____________ aggregate Principal Amount at Maturity (subject to Sections 2.02
and 2.07 of the Indenture).  The Indenture does not limit other Debt of the
Company, secured or unsecured, including Senior Indebtedness.

5.  REDEMPTION AT THE OPTION OF THE COMPANY.

    No sinking fund is provided for the Securities.  The Securities are
redeemable as a whole, or from time to time in part, at any time at the option
of the Company at the Redemption Prices set forth below, provided that the
Securities are not redeemable prior to ___________ __, 2000.

    The table below shows Redemption Prices of a Security per $1,000 Principal
Amount at Maturity on the dates shown below and at Stated Maturity, which prices
reflect accrued Original Issue Discount calculated through each such date.  The
Redemption Price of a Security redeemed between such dates shall include an
additional amount reflecting the additional Original Issue Discount accrued from
the next preceding date in the table through the actual Redemption Date.


                                       A-4


                                (1)         (2)         (3)
                                          Accrued
                                          Original
                                           Issue     Redemption
                               LYON       Discount      Price
Redemption Date             Issue Price    at ___%   (1) + (2)
- ---------------             -----------   --------   ----------
_______ __, 2000             $            $            $
_______ __, 2001
_______ __, 2002
_______ __, 2003
_______ __, 2004
_______ __, 2005
_______ __, 2006
_______ __, 2007
_______ __, 2008
_______ __, 2009
_______ __, 2010
_______ __, 2011
_______ __, 2012
_______ __, 2013
_______ __, 2014
At Stated Maturity .....                              1,000.00

6.  PURCHASE BY THE COMPANY AT THE OPTION OF THE HOLDER OR UPON A CHANGE IN
    CONTROL.

         Subject to the terms and conditions of the Indenture, on the following
Purchase Date the Company shall become obligated, and the Company may also elect
to become obligated on the following Optional Purchase Date, to purchase, at the
option of the Holder, the Securities held by such Holder on such Purchase Date
or, if applicable, such Optional Purchase Date, at the following Purchase Prices
per $1,000 Principal Amount at Maturity, upon delivery by the Holder of a
Purchase Notice containing the information set forth in the Indenture, at any
time from the opening of business on the date that is 20 Business Days prior to
such Purchase Date or Optional Purchase Date, as applicable, until the close of
business on such Purchase Date or Optional Purchase Date and upon delivery of
the Securities to the Paying Agent by the Holder as set forth in the Indenture.


    Purchase Date                      Purchase Price
    -------------                      --------------
    _______ __, 2000                      $

    Optional Purchase Date             Purchase Price
    ----------------------             --------------
    _______ __, 2005                      $


                                       A-5


         Each such Purchase Price (equal to the Issue Price plus accrued
Original Issue Discount through the Purchase Date or Optional Purchase Date, as
applicable) may be paid, at the option of the Company, in cash, by the issuance
and delivery of Common Shares of the Company or by the delivery of publicly
traded common equity securities of Telephone and Data Systems, Inc. ("TDS") to
be specified by the Company, or in any combination thereof.

         At the option of the Holder and subject to the terms and conditions of
the Indenture, the Company shall become obligated to purchase the Securities
held by such Holder 35 Business Days after the occurrence of a Change in Control
of the Company occurring on or prior to            , 2000 for a Change in
Control Purchase Price equal to the Issue Price plus accrued Original Issue
Discount through the Change in Control Purchase Date, which Change in Control
Purchase Price shall be paid in cash.

         Holders have the right to withdraw any Purchase Notice or Change in
Control Purchase Notice, as the case may be, by delivering to the Paying Agent a
written notice of withdrawal in accordance with the provisions of the Indenture
prior to the close of business on the Purchase Date or Change in Control
Purchase Date, as the case may be.

         If cash (and/or securities if permitted under the Indenture) sufficient
to pay the Purchase Price or Change in Control Purchase Price, as the case may
be, of all Securities or portions thereof to be purchased as of the Purchase
Date or the Optional Purchase Date, as applicable, or the Change in Control
Purchase Date, as the case may be, is deposited with the Paying Agent on the
Business Day following the Purchase Date or the Optional Purchase Date, as
applicable, or the Change in Control Purchase Date, as the case may be, Original
Issue Discount ceases to accrue on such Securities (or portions thereof)
immediately after such Purchase Date, Optional Purchase Date or Change in
Control Purchase Date, as the case may be, and the Holder thereof shall have no
other rights as such (other than the right to receive the Purchase Price or
Change in Control Purchase Price, as the case may be, upon surrender of such
Security).

7.NOTICE OF REDEMPTION.

         Notice of redemption will be mailed at least 30 days but not more than
60 days before the Redemption Date to each Holder of Securities to be redeemed
at the Holder's registered address.  If money sufficient to pay the Redemption
Price of all Securities (or portions thereof) to be redeemed on the Redemption
Date is deposited with the Paying Agent prior to or on the Redemption Date,
immediately after such Redemption Date


                                       A-6


Original Issue Discount ceases to accrue on such Securities or portions thereof.
Securities in denominations larger than $1,000 of Principal Amount at Maturity
may be redeemed in part but only in integral multiples of $1,000 of Principal
Amount at Maturity.

8.SUBORDINATION.

         The Securities are subordinated to all existing and future Senior
Indebtedness.  To the extent provided in the Indenture, Senior Indebtedness must
be paid before the Securities may be paid.  The Indenture does not limit the
present or future amount of Senior Indebtedness the Company may have.  The
Company agrees, and each Securityholder by accepting a Security agrees, to the
subordination and authorizes the Trustee to give it effect and appoints the
Trustee as attorney-in-fact for such purpose.

9.CONVERSION.

         Subject to the first, second and fourth succeeding sentences, a Holder
of a Security may convert it into Common Shares of the Company at any time
before the close of business on             , 2015.  If the Security is called
for redemption, the Holder may convert it at any time before the close of
business on the Redemption Date.  A Security in respect of which a Holder has
delivered a Purchase Notice or Change in Control Purchase Notice exercising the
option of such Holder to require the Company to purchase such Security may be
converted only if such notice of exercise is withdrawn in accordance with the
terms of the Indenture.  The number of Common Shares to be delivered upon
conversion of a Security into Common Shares per $1,000 of Principal Amount at
Maturity shall be equal to the Conversion Rate in effect on the Conversion Date.
Subject to the terms of the Indenture, the Holder's right to convert Securities
into Common Shares is subject to the Company's right to elect to pay a Holder
surrendering a Security pursuant to Article 11 of the Indenture an amount of
cash as set forth in the next succeeding sentence, in lieu of delivering such
Common Shares; provided that if such payment is not permitted pursuant to the
terms of the Indenture or otherwise, the Company shall deliver Common Shares
(and cash in lieu of fractional shares) upon conversion of Securities.  The
amount of cash to be paid in lieu of Common Shares pursuant to such election by
the Company per $1,000 of Principal Amount at Maturity of a Security upon
conversion of such Security shall be equal to the Sale Price of Common Shares on
the trading day immediately preceding the Conversion Date multiplied by the
Conversion Rate in effect on such trading day subject to adjustment upon the
occurrence of certain events.

         The initial Conversion Rate is        Common Shares per $1,000
Principal Amount at Maturity, subject to adjustment in


                                       A-7


certain events described in the Indenture.  The Company will deliver cash or a
check in lieu of any fractional Common Shares.

         To convert a Security, a Holder must (1) complete and manually sign the
conversion notice below (or complete and manually sign a facsimile of such
notice) and deliver such notice to the Conversion Agent, (2) surrender the
Security to the Conversion Agent, (3) furnish appropriate endorsements and
transfer documents if required by the Conversion Agent, the Company or the
Trustee and (4) pay any transfer or similar tax, if required.

         If the Holder converts more than one Security at the same time, the
number of Common Shares issuable upon the conversion shall be based on the total
Principal Amount at Maturity of the Securities converted.

         A Holder may convert a portion of a Security if the Principal Amount at
Maturity of such portion is $1,000 or an integral multiple of $1,000.  No
payment or adjustment will be made for dividends or other distributions on the
Common Shares except as provided in the Indenture.  On conversion of a Security
(other than a conversion executed pursuant to the delivery of Common Shares by
the Standby Share Deliverer pursuant to a Common Share Delivery Arrangement
contemplated by Section 11.19 of the Indenture), that portion of accrued
Original Issue Discount attributable to the period from the Issue Date through
the Conversion Date with respect to the converted Security shall not be
cancelled, extinguished or forfeited, but rather shall be deemed to be paid in
full to the Holder thereof through the delivery of the Common Shares (together
with the cash payment, if any, in lieu of fractional Common Shares) or of the
cash, as the case may be, in exchange for the Security being converted pursuant
to the terms hereof; and, if the Company delivers Common Shares (and cash in
lieu of fractional shares) upon conversion of Securities, the fair market value
of such Common Shares (together with any such cash payment in lieu of fractional
Common Shares) shall be treated as issued, to the extent thereof, first in
exchange for Original Issue Discount accrued through the Conversion Date, and
the balance, if any, of such fair market value of such Common Shares (and any
such cash payment) shall be treated as issued in exchange for the Issue Price of
the Security being converted pursuant to the provisions hereof.

         The Conversion Rate will be adjusted for dividends or distributions on
Common Shares payable in Common Shares or other Capital Stock; subdivisions,
combinations or certain reclassifications of Common Shares; distributions to all
holders of Common Shares of certain rights to purchase Common Shares for a
period expiring within 60 days at less than the Quoted Price at the Time of
Determination; and distributions to such holders of assets or debt securities of
the Company or certain rights to


                                       A-8


purchase securities of the Company (excluding certain cash dividends or
distributions).  However, no adjustment need be made if Securityholders may
participate in the transaction or in certain other cases.  The Company from time
to time may voluntarily increase the Conversion Rate.

         If the Company is a party to a consolidation, merger or binding share
exchange or a transfer of all or substantially all of its assets, or upon
certain distributions described in the Indenture, the right to convert a
Security into Common Shares may be changed into a right to convert it into
securities, cash or other assets of the Company or another person.

10.  CONVERSION ARRANGEMENT ON CALL FOR REDEMPTION.

         Any Securities called for redemption, unless surrendered for conversion
before the close of business on the Redemption Date, may be deemed to be
purchased from the Holders of such Securities at an amount not less than the
Redemption Price, together with accrued interest, if any, to the Redemption
Date, by one or more investment bankers or other purchasers who may agree with
the Company to purchase such Securities from the Holders, to convert them into
Common Shares of the Company and to make payment for such Securities to the
Paying Agent in trust for such Holders.

11.  DENOMINATIONS; TRANSFER; EXCHANGE.

         The Securities are in fully registered form, without coupons, in
denominations of $1,000 of Principal Amount at Maturity and integral multiples
of $1,000.  A Holder may transfer or exchange Securities in accordance with the
Indenture.  The Registrar may require a Holder, among other things, to furnish
appropriate endorsements and transfer documents and to pay any taxes and fees
required by law or permitted by the Indenture.  The Registrar need not transfer
or exchange any Securities selected for redemption (except, in the case of a
Security to be redeemed in part, the portion of the Security not to be redeemed)
or any Securities in respect of which a Purchase Notice or Change in Control
Purchase Notice has been given and not withdrawn (except, in the case of a
Security to be purchased in part, the portion of the Security not to be
purchased) or any Securities for a period of 15 days before a selection of
Securities to be redeemed.

12.  PERSONS DEEMED OWNERS.

         The registered Holder of this Security may be treated as the owner of
this Security for all purposes.


                                       A-9


13.  UNCLAIMED MONEY OR SECURITIES.

         The Trustee and the Paying Agent shall return to the Company upon
written request any money or securities held by them for the payment of any
amount with respect to the Securities that remains unclaimed for two years,
PROVIDED, HOWEVER, that the Trustee or such Paying Agent, before being required
to make any such return, may at the expense of the Company cause to be published
once in a newspaper of general circulation in The City of New York or mail to
each Holder entitled to the money or securities notice that such money or
securities remains unclaimed and that, after a date specified therein, which
shall not be less than 30 days from the date of such publication or mailing, any
unclaimed money or securities then remaining will be returned to the Company.
After return to the Company, Holders entitled to the money or securities must
look to the Company for payment as general creditors unless an applicable
abandoned property law designates another person.

14.  AMENDMENT; WAIVER.

         Subject to certain exceptions set forth in the Indenture, (i) the
Indenture or the Securities may be amended with the written consent of the
Holders of at least a majority in aggregate Principal Amount at Maturity of the
Securities at the time outstanding and (ii) certain Defaults may be waived with
the written consent of the Holders of a majority in aggregate Principal Amount
at Maturity of the Securities at the time outstanding.  Subject to certain
exceptions set forth in the Indenture, without the consent of any
Securityholder, the Company and the Trustee may amend the Indenture or the
Securities to cure any ambiguity, omission, defect or inconsistency, to comply
with Article 5 or Section 11.14 of the Indenture, to provide for uncertificated
Securities in addition to or in place of certificated Securities, to eliminate
the Company's option to pay cash in lieu of delivering Common Shares upon
conversion of Securities (other than cash in lieu of fractional shares and
except with respect to such elections already made) or to enter into Common
Share Delivery Arrangements in connection with conversions of Securities (other
than such arrangements already entered into), to make any change that does not
adversely affect the rights of any Securityholder, or to comply with any
requirement of the SEC in connection with the qualification of the Indenture
under the TIA.

15.  DEFAULTS AND REMEDIES.

         Under the Indenture, Events of Default include (i) default in payment
of the Principal Amount at Maturity, Issue Price plus accrued Original Issue
Discount, Redemption Price, Purchase Price or Change in Control Purchase Price,
as the case may be, in respect of the Securities when the same becomes due


                                      A-10


and payable or default in the payment of cash in accordance with the terms of
the Indenture upon conversion of any security; (ii) failure by the Company to
comply with other agreements in the Indenture or the Securities, subject to
notice and lapse of time; (iii) default under any bond, debenture, note or other
evidence of indebtedness for money borrowed by the Company having an aggregate
outstanding principal amount of in excess of $25,000,000, which default shall
have resulted in such indebtedness becoming or being declared due and payable
prior to the date on which it would otherwise have become due and payable
without such indebtedness being discharged or such acceleration having been
rescinded or annulled, or there having been deposited in trust a sum of money
sufficient to discharge such indebtedness, in each case within a period of
20 days after the receipt by the Company of a Notice of Default; (iv) certain
events of bankruptcy or insolvency; and (v) failure by the Company to deliver
Common Shares (or cash in lieu of fractional Common Shares) when such Common
Shares (or cash in lieu of fractional Common Shares) are required to be
delivered by the Company in accordance with Article 11 of the Indenture upon
conversion of any Security and the continuance of such default for 10 days.  If
an Event of Default occurs and is continuing, the Trustee, or the Holders of at
least 25% in aggregate Principal Amount at Maturity of the Securities at the
time outstanding, may declare all the Securities to be due and payable
immediately.  Certain events of bankruptcy or insolvency are Events of Default
which will result in the Securities becoming due and payable immediately upon
the occurrence of such Events of Default.

         Securityholders may not enforce the Indenture or the Securities except
as provided in the Indenture.  The Trustee may refuse to enforce the Indenture
or the Securities unless it receives reasonable indemnity or security.  Subject
to certain limitations, Holders of a majority in aggregate Principal Amount at
Maturity of the Securities at the time outstanding may direct the Trustee in its
exercise of any trust or power.  The Trustee may withhold from Securityholders
notice of any continuing Default (except a Default in payment of amounts
specified in clause (i) above) if it determines that withholding notice is in
their interests.

16.  TRUSTEE DEALINGS WITH THE COMPANY.

         Subject to certain limitations imposed by the TIA, the Trustee under
the Indenture, in its individual or any other capacity, may become the owner or
pledgee of Securities and may otherwise deal with and collect obligations owed
to it by the Company or its Affiliates and may otherwise deal with the Company
or its Affiliates with the same rights it would have if it were not Trustee.


                                      A-11


17.  NO RECOURSE AGAINST OTHERS.

         A director, officer, employee or stockholder, as such, of the Company
shall not have any liability for any obligations of the Company under the
Securities or the Indenture or for any claim based on, in respect of or by
reason of such obligations or their creation.  By accepting a Security, each
Securityholder waives and releases all such liability.  The waiver and release
are part of the consideration for the issue of the Securities.

18.  AUTHENTICATION.

         This Security shall not be valid until an authorized signatory of the
Trustee manually signs the Trustee's Certificate of Authentication on the other
side of this Security.

19.  ABBREVIATIONS.

         Customary abbreviations may be used in the name of a Securityholder 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 Gift to Minors
Act).

20.  GOVERNING LAW.

         THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THE INDENTURE AND THIS
SECURITY.

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

         The Company will furnish to any Securityholder upon written request and
without charge a copy of the Indenture which has in it the text of this Security
in larger type.  Requests may be made to:

         United States Cellular Corporation
         8410 West Bryn Mawr, Suite 700
         Chicago, IL  60631-3486
         Attention:  Corporate Secretary


                                      A-12


       ASSIGNMENT FORM               CONVERSION NOTICE

To assign this Security, fill     To convert this Security into
in the form below:                Common Shares of the
                                  Company, check the box:

I or we assign and transfer             ----
this Security to                        :  :
                                        :  :
   -----------------------              ----
   :                     :
   -----------------------        To convert only part of this
                                  Security, state the Principal
                                  Amount at Maturity to be converted
   (Insert assignee's soc.        (which must be $1,000 or an
     sec. or tax ID no.)          integral multiple of $1,000):
                                     -----------------------
- ------------------------------       :$                    :
                                     -----------------------
- ------------------------------
                                  If you want the share
- ------------------------------    certificate made out in
                                  another person's name, fill
- ------------------------------    in the form below:
(Print or type assignee's
name, address and zip code)           -----------------------
                                      :                     :
and irrevocably appoint               -----------------------
- ---------------------agent            (Insert other person's
to transfer this Security on          soc. sec. or tax ID no.)
the books of the Company.
The agent may substitute          --------------------------------
another to act for him.
                                  --------------------------------

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

                                  --------------------------------
                                  (Print or type other person's
                                  name, address and zip code)

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


Date:                   Your Signature:
     -----------------                 ------------------------

- ----------------------------------------------------------------
(Sign exactly as your name appears on the other side of this Security)


                                      A-13