* IMPORTANT NOTE:  CERTAIN  MATERIAL,  INDICATED BY AN ASTERISK ("*"),  HAS BEEN
OMITTED FROM THIS DOCUMENT PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT.



[GRAPHIC OMITTED][GRAPHIC OMITTED]


As of September 7, 2000


Pathnet Operating, Inc.
11720 Sunrise Valley Drive
Reston, Virginia 20191
Attn:  Mr. James Craig

Ladies and Gentlemen:

                  Cisco Systems Capital Corporation, a corporation organized and
existing under the laws of the State of Nevada,  is pleased to make available to
Pathnet Operating,  Inc., a corporation organized and existing under the laws of
the State of Delaware,  a credit facility in the aggregate  principal  amount of
$50,000,000, on the following terms and conditions:

     SECTION 1. DEFINITIONS.

     1.1  DEFINITIONS.  As  used  in  this  agreement  (this  "Agreement"),  the
following terms shall have the following meanings:

     "AFFILIATE"  means,  as to any Person  (the  "SUBJECT  PERSON"),  any other
Person  (a) that  directly  or  indirectly  through  one or more  intermediaries
controls or is  controlled  by, or is under  direct or indirect  common  control
with, the subject Person,  (b) that directly or indirectly  beneficially owns or
holds 10% or more of any class of voting capital stock of the subject Person, or
(c) 10% or more of the voting  capital  stock of which is directly or indirectly
beneficially  owned or held by the  subject  Person.  For the  purposes  of this
definition,  "control"  when used with  respect to any Person means the power to
direct 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.  Neither Lender nor any Loan Party shall be deemed to be an Affiliate
of Borrower for purposes of the Loan Documents.

     "ADDITIONAL  BORROWER"  means any  Additional  Borrower  designated  in the
Schedule or any Subsidiary of Borrower acceding hereto as an Additional Borrower
as contemplated by the Schedule.

     "APPROVED  SERVICES  AGREEMENT" means the Intercompany  Services  Agreement
dated August 9, 2000 between PNI and Borrower.

     "APPROVED TAX ALLOCATION  AGREEMENT" means the Tax Sharing  Agreement dated
August 9, 2000 between Holdings and Borrower.

     "ASSET CONTRIBUTION AGREEMENT" means the Asset Contribution Agreement dated
as of August 9, 2000 between Holdings, Borrower, PFE and PRE.

     "AVAILABILITY PERIOD" has the meaning set forth in the Schedule.

     "BANKING DAY" has the meaning set forth in the Note(s).

     "BANKRUPTCY  CODE"  means  Title  11 of the  United  States  Code  entitled
"Bankruptcy".

     "BORROWER" means Pathnet Operating, Inc. (subject to Section 7.15).

     "BORROWER SECURITY AGREEMENT" means the Pledge and Security Agreement dated
as of August 9, 2000 between  Borrower and Collateral  Agent,  as such agreement
may be amended, modified,  supplemented,  renewed, extended or restated with the
prior written consent of Lender

     "BORROWING DATE" means any date on which a Loan is made to Borrower.

     "BUSINESS PLAN" means the business plan of the Borrower in effect from time
to time, as approved by Lender.  The initial  business plan of Borrower is dated
as of August 4, 2000 and was delivered to Lender prior to the date hereof.

     "CHANGE OF CONTROL"  means (i) the  acquisition  of  beneficial  ownership,
directly  or  indirectly,  by any  Person or group  (within  the  meaning of the
Securities  Exchange  Act of 1934 and the rules of the  Securities  and Exchange
Commission  thereunder  as in effect on the date hereof) of shares  representing
more than 35% of the aggregate  ordinary voting power  represented by the issued
and  outstanding  capital stock of Holdings  other than such an  acquisition  by
Permitted Holders or a group controlled by Permitted Holders; (ii) occupation of
a majority of the seats  (other than vacant  seats) on the Board of Directors of
Holdings by Persons who were neither (A)  nominated by the Board of Directors of
Holdings nor (B) appointed by directors so nominated; (iii) Holdings shall cease
to own and control directly,  of record and beneficially,  100% of each class of
outstanding  capital  stock of Borrower  free and clear of all Liens (other than
any Liens  under the  Collateral  Documents);  or (iv) the  consummation  of any
transaction  the result of which is that any Person or group  beneficially  owns
more of the  Voting  Stock  of  Holdings  than  is  beneficially  owned,  in the
aggregate, by the Permitted Holders.

     "CISCO  SYSTEMS" means Cisco  Systems,  Inc. or any Subsidiary or affiliate
thereof.

     "CISCO  PRODUCTS"  means  networking and  telecommunications  equipment and
other goods, spare parts, accessories, software and services which Cisco Systems
manufactures, assembles, sells, licenses or provides.

     "CISCO PURCHASE AGREEMENT" has the meaning set forth in the Schedule.

     "CLOSING DATE" means the date  occurring on or before the Closing  Deadline
on which all  conditions  precedent  set forth in Section 3.1 are  satisfied (or
waived by Lender).

     "CLOSING DEADLINE" has the meaning set forth in the Schedule.

     "COLLATERAL" means the property described in the Collateral Documents,  and
all other  property now existing or hereafter  acquired which may at any time be
or become subject to a Lien in favor of Lender or, if the Collateral  Agency and
Intercreditor  Agreement  is in place,  the  Collateral  Agent  pursuant  to the
Collateral  Documents or otherwise,  securing the payment and performance of the
Obligations.

     "COLLATERAL  AGENT"  means  State  Street  Bank and  Trust  Company  in its
capacity  as  collateral  agent  under the terms of the  Collateral  Agency  and
Intercreditor Agreement and any successor thereof.

     "COLLATERAL AGENCY AND INTERCREDITOR  AGREEMENT" means that certain Amended
and Restated Collateral Agency and Intercreditor Agreement dated as of September
7,  2000  among  the  Collateral  Agent,  and  the  "Represented   Holders"  and
"Unrepresented Holders" referred to therein.

     "COLLATERAL  DOCUMENTS"  means each Collateral  Document  identified in the
Schedule,  any security agreement provided by a Subsidiary of Borrower hereunder
and any other  agreement  pursuant  to which any Loan Party or any other  Person
provides a Lien on its assets in favor of Lender  or, if the  Collateral  Agency
and  Intercreditor  Agreement is in place,  the Collateral  Agent, to secure the
Obligations and all filings, documents and agreements made or delivered pursuant
thereto.

     "COMMITMENT" means the Dollar amount set forth in the Schedule or where the
context so requires, the obligation of Lender to make Loans up to such aggregate
principal amount on the terms and conditions set forth in this Agreement.

     "COMPLIANCE  CERTIFICATE" means a certificate of Borrower, in substantially
the form of Exhibit B, with such changes thereto as Lender may from time to time
reasonably request.

     "CONDUIT"  means any conduit  capable of containing  one or more strands of
Fiber.

     "CONTRACT  RIGHTS-OF-WAY"  means  any and  all  rights-of-way  (whether  an
easement,  lease, contract or agreement in any form) or similar authorization to
use any real  property  or any  interest  therein  contractually  granted by any
Person to or in favor of any Loan Party or Holdings in connection with, and used
in connection  with, the Network,  including leases and licenses entered into in
connection with the Master Rights-of-Way Agreements.

     "CONTRIBUTED  RIGHTS-OF-WAY  CAPITALIZATION  VALUE" means,  for purposes of
Section 5.1(o) only,  $10,000 for each mile of  right-of-way  contributed to the
Borrower by Holdings  pursuant  to the terms of the  Rights-of-Way  Contribution
Agreement or any additional or future  agreement  between  Holdings and Borrower
for the contribution of rights-of-way to Borrower from Holdings as capital.

     "CREDITOR" has the meaning set forth in the Schedule.

     "CUSTOMER  AGREEMENTS"  means  an  agreement  with a  Person  who is not an
Affiliate of Borrower providing for the sale, lease, transfer, swap, exchange or
other disposition of, or the grant of any other right to use, or the grant of an
option to  purchase,  acquire,  lease or  otherwise  use, all or any part of the
Network,  whether relating to transmission  capacity,  Conduit or any individual
strand or strands of Fiber.

     "DEFAULT"  means an Event of  Default or an event or  condition  which with
notice or lapse of time or both would constitute an Event of Default.

     "DOLLARS" and the sign "$" each means lawful money of the United States.

     "ELIGIBLE  ENTITY"  means (a) a Person  that is  primarily  engaged  in the
business of banking or commercial finance with a combined capital and surplus of
at least  $500,000,000,  (b) a Person  purchasing  the  division(s)  or business
unit(s) of Cisco Systems  responsible for producing a substantial portion of the
Financed  Products,  (c) a Person  acquiring  or  merging  with  Lender or Cisco
Systems, or (d) any Affiliate of Lender or Cisco Systems.

     "ELIGIBLE  SECURED DEBT" means (a)  Indebtedness  of Borrower in respect of
the Loans, (b) any other Indebtedness for borrowed money of Borrower incurred to
finance the  acquisition,  construction,  installation or improvement of capital
assets  (including  Fiber and Conduit) that constitute part of the Collateral or
the Real Estate Assets and (c) any  Indebtedness  for borrowed money of Borrower
incurred to  refinance  Indebtedness  referred to in clause (b) above;  PROVIDED
that (i) in the case of any  Indebtedness  described  in clause (b) above,  such
Indebtedness is incurred  within 270 days of such  acquisition or the completion
of such  construction,  installation  or  improvement  and the principal  amount
thereof  does  not  exceed  100% of the  aggregate  cost  of  such  acquisition,
construction,  installation or improvement, (ii) in the case of any Indebtedness
described in clause (b) or (c) above, the holder or holders of such Indebtedness
(or a duly  authorized  representative  thereof on behalf of such holders) shall
have become a party to the  Collateral  Agency and  Intercreditor  Agreement  as
provided therein,  (iii) in the case of any Indebtedness described in clause (b)
or (c) above, at the time any such Indebtedness is incurred  (including pursuant
to any increase in the principal  amount thereof) no Default shall have occurred
and be continuing  (both before and after giving effect to such  incurrence) and
Borrower shall be in compliance  with each of the covenants set forth in Section
5.1(o)  determined  on a pro forma basis as of the last day of the most recently
ended fiscal quarter of Borrower for which financial statements are available as
though  such  Indebtedness  had been  incurred  on the  last day of such  fiscal
quarter for testing compliance with each such covenant,  and Borrower shall have
delivered  to  Lender  a  reasonably  detailed  calculation  demonstrating  such
compliance,  and (iv) in the case of any Indebtedness  referred to in clause (b)
or (c) above,  such  Indebtedness  is not  guaranteed  by any Person (other than
pursuant to a Guaranty) or secured by any Lien (other than Liens  granted  under
the Collateral Documents).

     "ELIGIBLE  SECURED DEBT  DOCUMENTS"  means the  agreements,  documents  and
instruments evidencing or governing any Eligible Secured Debt.

     "EVENT OF DEFAULT" has the meaning set forth in Section 6.1.

     "FCC'  means  the  Federal  Communications  Commission,  or  any  successor
thereto, administering the Communications Act of 1934.

     "FIBER" means fiber optic cable that is, or is intended to be, installed in
the Network or any strand or strands of fiber included in any such cable, as the
context may provide.

     "FIBER OR CONDUIT  PURCHASE" means,  with respect to Borrower or any of its
Subsidiaries, any acquisition (by purchase, lease, exchange or otherwise) of any
Fiber or Conduit or right to use Fiber or Conduit for use in the Network.

     "FIBER OR CONDUIT  SALE" means,  with respect to the Borrower or any of its
Subsidiaries, any sale, lease, transfer or other disposition of, or any grant of
any other right to use, or any grant of an option to purchase, acquire, lease or
otherwise  use, all or part of the  Network,  whether  relating to  transmission
capacity  or any  individual  Conduit or Conduits  or any  individual  strand or
strands of Fiber.

     "FINANCED PRODUCTS" means the Cisco Products and other goods,  services and
other property the acquisition of which is financed by Lender or with respect to
which Lender is  otherwise  providing  financing  or extending  credit to enable
Borrower to acquire.

     "FINANCING DOCUMENTS" has the meaning set forth in the Schedule.

     "FUNDING  PROCEDURES AND POLICIES" means Lender's  "Funding  Procedures and
Policies" as in effect from time to time, as  communicated  to Borrower.  "GAAP"
means generally accepted accounting principles as in effect from time to time.

     "GOVERNMENTAL  AUTHORITY"  means any  national  government,  or any  state,
province or other political  subdivision thereof or therein, or any governmental
ministry,  department,  body,  commission,  board, bureau, agency, central bank,
court,  tribunal or other  instrumentality  or authority  exercising  executive,
legislative,  judicial,  regulatory or administrative functions of or pertaining
to government.

     "GUARANTOR" means PFE, PRE, any Subsidiary of Borrower or Holdings becoming
a guarantor as provided under Section 5.1(n) and any other guarantor  identified
in the Schedule.

     "GUARANTOR   DOCUMENTS"   means  any  Guaranty  and  all  other  documents,
agreements  and  instruments  delivered  to the  Collateral  Agent  under  or in
connection with any Guaranty.

     "GUARANTY" means the guaranty of any Guarantor, as provided
under  Section  5.1(n),  and any  guaranty of any  Guarantor  identified  in the
Schedule.

     "HOLDINGS" means Pathnet Telecommunications,  Inc., a corporation organized
and existing under the laws of the State of Delaware.

     "HOLDINGS PLEDGE  AGREEMENT" means the Pledge and Security  Agreement dated
as of  August  9,  2000  between  Holdings  and the  Collateral  Agent,  as such
agreement may be amended, modified, supplemented,  renewed, extended or restated
with the prior written consent of Lender.

     "INDEBTEDNESS"  means,  for any  Person,  (i)  all  indebtedness  or  other
obligations  of such Person for borrowed  money,  or for the  deferred  purchase
price of property or services  (acquired or obtained  other than on normal trade
credit terms);  (ii) all obligations  evidenced by notes,  bonds,  debentures or
similar instruments,  including  obligations so evidenced incurred in connection
with the acquisition of property, assets or businesses; (iii) all non-contingent
reimbursement  and other  obligations  of such  Person in  respect of letters of
credit and bankers  acceptances  and all net  obligations in respect of interest
rate swaps, caps, floors and collars, currency swaps, or other similar financial
products;  (iv) all obligations under leases which shall have been or should be,
in accordance with GAAP, recorded as capital leases; and (v) all indebtedness of
another Person of the types  referred to in clauses (i) through (iv)  guaranteed
directly  or  indirectly  in any manner by the Person for whom  Indebtedness  is
being determined.

     "INSOLVENCY PROCEEDING" means (i) any case, action or proceeding before any
court or other Governmental  Authority  relating to bankruptcy,  reorganization,
insolvency,  liquidation,  receivership,  dissolution,  winding-up  or relief of
debtors,   or  (ii)  any  general  assignment  for  the  benefit  of  creditors,
composition,  marshalling of assets for creditors, or other, similar arrangement
in  respect  of its  creditors  generally  or  any  substantial  portion  of its
creditors,  in each case undertaken  under U.S.  federal,  state or foreign law,
including the Bankruptcy Code.

     "INDEMNITY AND CONTRIBUTION AGREEMENT" means the Indemnity, Subrogation and
Contribution  Agreement  dated as of  August 9, 2000  among  the  Borrower,  the
Subsidiaries  from time to time party thereto,  and the Collateral Agent, as any
such  agreement may be amended,  modified,  supplemented,  renewed,  extended or
restated with the prior written consent of Lender.

     "INTEREST RATE  PROTECTION  AGREEMENT"  means an interest rate swap, cap or
collar agreement or similar arrangement providing for the transfer or mitigation
of interest rate risks either generally or under specified contingencies.

     "LENDER" means Cisco Systems Capital Corporation.

     "LIEN" means any mortgage, pledge, security interest,  assignment,  deposit
arrangement,   charge  or  encumbrance,  lien  or  other  type  of  preferential
arrangement (other than a financing statement filed by a lessor in respect of an
operating lease not intended as security).

     "LOAN DOCUMENTS" means this Agreement, the Notes, any Collateral Documents,
any Guaranty,  any Guarantor  Documents and all other  certificates,  documents,
agreements and instruments  delivered to Lender under or in connection with this
Agreement.

     "LOAN PARTY" means Borrower, each Additional Borrower and each Guarantor.

     "LOANS" has the meaning set forth in Section 2.1.

     "MAGTEN  LITIGATION" means the litigation  evidenced by the Complaint filed
with the Supreme Court of the State of New York,  County of New York,  Index No.
602083/00  styled as Magten  Partners,  L.P.  and others as  plaintiffs  against
Pathnet, Inc., Pathnet Telecommunications, Inc., Richard Jalkut, The Bank of New
York,  Colonial Pipeline Company,  The Burlington  Northern and Sante Fe Railway
Company and CSX Transportation, Inc., as defendants.

     "MASTER RIGHTS-OF-WAY AGREEMENTS" means that certain (a) Fiber Optic Access
Agreement  dated as of March  30,  2000,  between  Holdings  and The  Burlington
Northern  and Santa Fe Railway  Company,  (b) Fiber  Optic  Access  and  License
Agreement  dated as of March 30, 2000,  between CSX  Transportation,  Inc.,  for
itself and as operator for New York Central  Lines LLC,  and  Holdings,  and (c)
Fiber Optic Access and Purchase  Agreement  dated as of March 30, 2000,  between
Holdings and Colonial Pipeline  Company,  in each case as any such agreement may
be amended or modified from time to time in accordance with Section 5.1(r).

     "MATERIAL  ADVERSE  CHANGE"  means  (i) a  material  adverse  change in the
business,  operations  or financial  condition of Borrower and its  Subsidiaries
taken as a whole, or (ii) any event, matter, condition or circumstance which (A)
would  materially  impair the  ability of any Loan Party or any other  Person to
perform or observe its obligations under or in respect of the Loan Documents, or
(B) materially affects the legality,  validity, binding effect or enforceability
of any of the Loan Documents.

     "MATERIAL CONTRACTS" means, as to any Loan Party, any Customer Agreement or
supply,  purchase,  service,  employment,  tax, indemnity,  shareholder or other
agreement  or  contract  for which  the  aggregate  amount or value of  services
performed or to be performed for or by, or funds or other  property  transferred
or to be transferred to or by, any Loan Party to such agreement or contract,  or
by which any Loan Party or any of its properties is otherwise bound,  during any
fiscal year of such Loan Party exceeds (i) $1,000,000 (or the equivalent  amount
in any  currency)  with  respect  to  other  than  Customer  Agreements  or (ii)
$5,000,000  (or the  equivalent  amount in any  currency)  with  respect  to any
Customer  Agreement,  and any and all  amendments,  modifications,  supplements,
renewals or restatements thereof. Each Material Contract existing as of the date
of this Agreement is set forth in the Schedule.

     "NETWORK" means Borrower's  telecommunications network (including populated
or  unpopulated  Conduit),  consisting  primarily  of fiber optic cable but also
including copper lines, wireless assets and other  telecommunication  media, for
the provision of communications or related services developed,  installed and/or
operated,  or to be  developed,  installed  and/or  operated,  in each case,  as
described in or contemplated by the Business Plan.

     "NOTE" means each Promissory Note referred to in the Schedule.

     "OBLIGATIONS" means the indebtedness,  liabilities and other obligations of
any  Loan  Party  to  Lender  under or in  connection  with the Loan  Documents,
including  all Loans,  all  interest  accrued  thereon,  all fees due under this
Agreement and all other amounts  payable by any Loan Party to Lender  thereunder
or in connection therewith.

     "PFE" means  Pathnet  Fiber  Equipment  LLC, a Delaware  limited  liability
company.

     "PRE" means Pathnet Real Estate LLC, a Delaware limited liability company.

     "PERMITTED HOLDERS" means the Persons identified on Schedule 1.1(a) who are
shareholders  of Holdings as of the Closing Date together with their  respective
Affiliates and (b) any spouse,  parent,  sibling,  child or grandchild of any of
the aforesaid  individuals (in each case whether such  relationship  arises from
birth or adoption or through  marriage) or any trust established for the benefit
of any such individuals or any spouse,  parent,  sibling, child or grandchild or
any such individuals (in each case whether such  relationship  arises from birth
or adoption or through marriage).

     "PERMITTED  LIENS"  means:  (i) Liens in favor of Lender or Cisco  Systems,
(ii)  Liens  in  favor  of the  Collateral  Agent  pursuant  to  the  Collateral
Documents,  (iii) the existing Liens  disclosed in writing to Lender on Schedule
1.1; (iv) Liens for Taxes,  assessments or other  governmental  charges that are
not  delinquent  or which  are  being  contested  in good  faith by  appropriate
proceedings,  which  proceedings have the effect of preventing the forfeiture or
sale of the property  subject to such Liens or the  forfeiture  or sale of which
property  has been  prevented  by the  posting  of bonds or the  taking of other
appropriate   actions,  and  for  which  adequate  reserves  (as  determined  in
accordance  with  GAAP)  have  been  established;   (v)  Liens  of  materialmen,
mechanics,  warehousemen,  carriers or employees or other similar Liens provided
for  by  mandatory  provisions  of  law  and  securing  obligations  either  not
delinquent or being contested in good faith by appropriate proceedings and which
do not in the  aggregate  materially  impair the use or value of the property or
risk  the  loss  or  forfeiture  thereof  or for  which  adequate  reserves  (as
determined in accordance with GAAP) have been established; (vi) Liens consisting
of deposits or pledges or resulting from performance or surety bonds required to
secure the performance of bids,  trade  contracts,  leases,  public or statutory
obligations,  or other  obligations  of a like nature  incurred in the  ordinary
course of  business  (other than for  Indebtedness);  (vii) Liens upon or in any
property  acquired or held by Borrower or any of its  Subsidiaries to secure the
purchase price of such property or Indebtedness  incurred solely for the purpose
of financing the  acquisition of such property;  PROVIDED that (A) any such Lien
attaches  to such  property  concurrently  with or  within  90  days  after  the
acquisition  thereof,  (B) such Lien attaches solely to the property so acquired
in such transaction,  (C) the Indebtedness  secured by any such Lien so created,
assumed or existing shall not exceed the lesser of the cost or fair market value
at the time of acquisition  of the property  covered  thereby  (inclusive of the
cost of engineering,  furnishing and installation  services directly relating to
such  Property)  and shall not be less  than 75% of the  amortized  value of the
property  acquired  with the proceeds of such  indebtedness,  (D) the  aggregate
amount of all Indebtedness  secured by all such Liens,  when aggregated with the
Indebtedness  secured by all  purchase-money  Liens and all Liens in  connection
with any conditional  sale or other title  retention  agreement or capital lease
obligation (other than Qualifying Fiber or Conduit Purchases) existing as of the
Closing  Date or at any other  time,  shall not exceed  $30,000,000  at any time
outstanding  in the  aggregate,  and (E) no Default  would occur  hereunder as a
result of the incurrence of such Indebtedness; (viii) Liens on specific tangible
assets of Persons which become  Subsidiaries  of Borrower after the date of this
Agreement;  provided,  however,  that (A)  such  Liens  existed  at the time the
respective  Persons  became  Subsidiaries  and were not created in  anticipation
thereof, (B) any such Lien does not by its terms cover any assets after the time
such  Person  becomes a  Subsidiary  which were not  covered  immediately  prior
thereto,  (C) any such Lien does not by its terms secure any Indebtedness  other
than Indebtedness  existing  immediately prior to the time such Person becomes a
Subsidiary,  (D) the acquisition of such Person is permitted hereby,  and (E) no
Default  would  occur   hereunder  as  a  result  of  the   incurrence  of  such
Indebtedness;  (ix) Liens consisting of judgment or judicial  attachment  Liens,
PROVIDED that the enforcement of such Liens is effectively stayed, discharged or
bonded over within  sixty (60) days and all such Liens in the  aggregate  at any
time outstanding for Holdings and its Subsidiaries do not exceed $1,000,000; (x)
restrictions and other minor encumbrances on real property (including easements,
rights-of-way,  zoning  or other  restrictions)  which  do not in the  aggregate
materially  impair  the use or  value  of such  property  or  risk  the  loss or
forfeiture thereof; (xi) Liens created under the Eligible Secured Debt Documents
securing  the  Eligible  Secured  Debt  permitted  to  be  incurred  under  this
Agreement,  which  Liens must be PARI PASSU and of equal  priority  to the Liens
securing the  Obligations and must be subject to the terms and provisions of the
Collateral  Agency and  Intercreditor  Agreement;  (xii) deposits with insurance
companies to secure obligations in respect of insurance premiums other than life
insurance  premiums,  which  deposits  do not exceed the lesser of the amount of
premiums  payable in respect of such insurance within one year after the date of
deposit or $500,000 in aggregate amount at any time payable; (xiii) any interest
or title of a lessor under any lease not prohibited by this Agreement in respect
of the leased asset,  including rights of lessors under ground leases in respect
of real  property;  (xiv) rights in respect of the Network  arising  pursuant to
Customer  Agreements  relating  thereto,  PROVIDED  that none of such rights may
result in  Borrower's  failure to comply with the terms and  provisions  of this
Agreement;  (xv) Liens  attaching  to Fiber or Conduit  acquired  as a result of
Fiber or Conduit Purchases, which Liens existed at the time of such acquisition,
were not created in  contemplation  of such  acquisition and were not granted by
any Loan  Party  and which  Liens do not have a  material  adverse  effect on or
interfere with Borrower's and its Subsidiaries' ability to operate such Fiber or
Conduit; (xvi) leases,  subleases or rights-of-way granted to others by Borrower
or its  Subsidiaries  that  are  not  prohibited  by this  Agreement  and do not
materially  interfere  with the ordinary  conduct of business of the Borrower or
any of its Subsidiaries; and (xvii) any extension, renewal or replacement of any
of the  foregoing  Permitted  Liens,  PROVIDED that Liens  permitted  under this
clause  (xvii)  shall  not  be  extended  or  spread  to  cover  any  additional
Indebtedness  or property;  PROVIDED,  HOWEVER,  that (A) none of the  Permitted
Liens (except those in favor of Lender  securing  payment of the Obligations or,
if the Collateral Agency  Intercreditor  Agreement is in effect, in favor of the
Collateral  Agent securing payment of the Obligations and Eligible Secured Debt)
may attach or relate to the capital stock of or any other ownership  interest in
Borrower or any of its Subsidiaries,  (B) none of the Permitted Liens referenced
in clauses (iii),  (ix) and (xii) may attach to any Real Estate Assets,  and (C)
except  for the Liens  disclosed  in  connection  with  clause  (iii)  which are
expressly identified as constituting purchase money Liens, none of the Permitted
Liens referred to in such clause may have a priority equal or prior to the Liens
in favor of Lender or Collateral Agent as security for the Obligations.

     "PERMITTED  TELECOMMUNICATIONS  JOINT VENTURE" means a Person that is not a
Subsidiary of Borrower engaged in one or more  Telecommunications  Businesses in
which Borrower owns, directly or indirectly, an equity interest.

     "PERMITTED  TRANSACTION."  means (a) any  transaction  or series of related
transactions (the  "Transaction")  for the purpose of or resulting,  directly or
indirectly,  in (i) the acquisition of all or substantially all of the assets of
a Person,  or of any business or division of a Person,  (ii) the  acquisition of
all or any of the capital stock, partnership interests,  membership interests or
equity of any Person,  or otherwise  causing such Person to become a Subsidiary,
or (iii) a merger or consolidation or any other combination with another Person,
that in each case  conforms to the following  requirements:  (i) Borrower or the
applicable  Subsidiary is the surviving  Person or if such Loan Party is not the
surviving Person, the surviving Person takes all actions reasonably  required to
assume and  succeed to the rights and  obligations  of such Loan Party under the
Loan  Documents and to grant  Collateral  Agent or Lender (as the case may be) a
perfected  security interest in such surviving  Person's property (subject to no
Liens other than Permitted Liens); (ii) after giving effect to such Transaction,
Borrower and each of its Subsidiaries remains in compliance with Section 5.1(g),
(iii) Lender  shall have  received  promptly,  and in any event no less than ten
Banking  Days  prior to the  consummation  of such  Transaction,  (A)  financial
information regarding the assets, Person or business which is the subject of the
Transaction,  including pro forma  projected  financial  statements  showing the
effect of the Transaction on Borrower and its Subsidiaries,  and (B) a completed
worksheet in substantially the form of Schedule 1 to the Compliance  Certificate
demonstrating  PRO  FORMA  compliance  with the  financial  covenants  set forth
herein,  measured as of the last day of the fiscal  quarter  then most  recently
ended,  after giving effect to such  Transaction,  (iv) the Transaction shall be
consummated in accordance with applicable  Requirements of Law, (v) after giving
effect to such  Transaction:  (A) no  Default  or Event of  Default  shall  have
occurred and be  continuing or would result  therefrom,  (B) 100% of the capital
stock  of  any  acquired  or  newly  formed  corporation,  partnership,  limited
liability  company  or other  business  entity is owned  directly  by  Borrower,
Holdings or a Subsidiary of Borrower or Holdings,  and (C) all actions  required
to be taken with  respect to such  acquired  or newly  formed  Subsidiary  under
Section  5.1(n) or as otherwise  required  under Section  5.1(n) shall have been
taken, and (vi) such Transaction complies with either of the following:  (A) the
consideration  for such acquisition  consists of Borrower's equity securities or
(B) in the case of any such Transaction  including cash, cash equivalents and/or
the assumption of  Indebtedness,  the aggregate  amount thereof shall not exceed
$5,000,000 (or its equivalent in another currency) in the aggregate for all such
Transactions from the Closing Date to the date of repayment of the Loans; or (b)
cash  investments in one or more Permitted  Telecommunications  Joint  Ventures;
PROVIDED  that the  remainder of (i) the  aggregate  amount of such  investments
MINUS (ii) the aggregate  amount of income received on the amount invested shall
not exceed $5,000,000.

     "PERSON"  means an  individual,  corporation,  partnership,  joint venture,
trust, unincorporated organization or any other entity of whatever nature or any
Governmental Authority.

     "PNI" means Pathnet, Inc., a Delaware corporation.

     "PNI  SENIOR  NOTES"  means the  "Notes" as such term is defined in the PNI
Senior Notes Indenture.

     "PNI SENIOR NOTES INDENTURE" means that certain Indenture dated as of April
8, 1998,  between  PNI and The Bank of New York,  as  trustee,  as  amended  and
supplemented by that certain  Supplemental  Indenture dated as of March 30, 2000
between PNI and The Bank of New York, as trustee.

     "QUALIFYING  FIBER OR CONDUIT  PURCHASES" means Fiber or Conduit  Purchases
which  constitute  capital  lease  obligations  and for which all  consideration
payable therefor was paid in full by Borrower or its Subsidiaries at the time of
acquisition.

     "REAL ESTATE ASSETS" means (a) the  Rights-of-Way  Contribution  Agreement,
the  Contract  Rights-of-Way  and all  other  interests  in real  estate,  or in
contracts  relating to real  estate,  comprising  the  right-of-way  (whether an
easement, lease, contract or agreement in any form) for the Network, (b) all the
Fiber or Conduit installed in the Network,  (c) any other assets comprising part
of the Network that constitute real property or fixtures and (d) all fiber optic
cable or strands of fiber or conduit  obtained  pursuant to any swap or exchange
agreement,  but excludes any real property or interests  therein not referred to
in clauses (a), (b) or (c) preceding.

     "REQUIREMENT  OF LAW" means,  as to any Person,  any law,  treaty,  rule or
regulation or determination of an arbitrator or of a Governmental  Authority, in
each case  applicable to or binding upon the Person or any of its property or to
which the Person or any of its property is subject.

     "RESPONSIBLE  OFFICER" means, as to any Person, the chief financial officer
or treasurer of such Person (or any other senior officer of such Person involved
principally in the financial  administration or controllership  function of such
Person).

     "RESTRICTED PAYMENT" means (a) any dividend or other distribution,  payment
or penalty (whether in cash, property or obligations),  direct or indirect, paid
or payable by Borrower or any of its Subsidiaries on account of, with respect to
or in  connection  with (or the  setting  apart of money for a sinking  or other
analogous  fund for) any shares of any class of capital stock of Borrower or any
of its  Subsidiaries  now or hereafter  outstanding,  except a dividend  payable
solely in shares of that class of stock to the  holders of that  class;  (b) any
redemption,  conversion,  exchange, retirement, sinking fund or similar payment,
purchase or other  acquisition for value,  direct or indirect,  of any shares of
any  class  of  capital  stock of  Borrower  or any of its  Subsidiaries  now or
hereafter  outstanding;  (c) any payment or prepayment of principal of, premium,
if any, or  interest  on, or any  redemption,  conversion,  exchange,  purchase,
retirement or defeasance of, or payment with respect to, any  subordinated  debt
(including Subordinated Debt and any Indebtedness which is subordinated pursuant
to the  Subordination  Agreement);  and (d) any  payment  made to retire,  or to
obtain the surrender of, any  outstanding  warrants,  options or other rights to
acquire  shares  of  any  class  of  capital  stock  of  Borrower  or any of its
Subsidiaries now or hereafter outstanding.

     "RIGHTS-OF-WAY  CONTRIBUTION AGREEMENT" means the Right of Way Contribution
Agreement dated as of August 9, 2000 between Holdings as assignor,  and Borrower
and PRE as  assignees  pursuant to which all  rights,  titles and  interests  of
Holdings  in and to the Master  Rights-of-Way  Agreements,  as they relate to at
least 4,000 miles of Contract Rights-of-Way to be selected by Borrower from time
to time, is assigned to Borrower and PRE.

     "SCHEDULE" means the Schedule of Information attached hereto.

     "SECURITY  AGREEMENTS"  means the Holdings Pledge  Agreement,  the Borrower
Security  Agreement,  the  Subsidiary  Security  Agreements,  any other security
agreements,   pledge   agreements,   securities   pledge  agreements  and  other
agreements,  documents or instruments  evidencing or creating a Lien as security
for the Obligations or any portion thereof,  in form and substance  satisfactory
to Lender,  executed  by any Loan  Party,  in favor of Lender or in favor of the
Collateral  Agent, and any such agreement,  document or instrument  subsequently
executed in  accordance  or  connection  with this  Agreement  or any other Loan
Document.

     "SUBSIDIARY  SECURITY AGREEMENTS" means,  collectively,  (i) the Pledge and
Security  Agreement  dated as of August 9, 2000  between PFE and the  Collateral
Agent and (ii) the  Pledge  and  Security  Agreement  dated as of August 9, 2000
between PRE and the Collateral Agent, in each case, as any such agreement may be
amended,  modified,  supplemented,  renewed, extended or restated with the prior
written consent of Lender.

     "SUBORDINATED  DEBT" means unsecured  Indebtedness  (i) subordinated to the
payment of the  Obligations on terms  satisfactory  to Lender and (ii) the other
terms and conditions of which are  satisfactory to Lender  (including  terms and
conditions  relating to the  interest  rate and  payments,  fees,  amortization,
maturity, covenants, events of default and remedies).

     "SUBORDINATED  DEBT DOCUMENTS" means any and all agreements,  documents and
instruments now or hereafter evidencing or governing any Subordinated Debt.

     "SUBORDINATION  AGREEMENT"  means the  Subordination  Agreement dated as of
August 9, 2000 among the Loan  Parties  and the  Collateral  Agent,  as any such
agreement may be amended, modified, supplemented,  renewed, extended or restated
with the prior written consent of Lender.

     "SUBSIDIARY" means any corporation, association, partnership, joint venture
or other  business  entity of which more than 50% of the  voting  stock or other
equity  interest is owned directly or indirectly by any Person or one or more of
the other Subsidiaries of such Person or a combination thereof.

     "TAXES" means any and all present or future taxes, levies, imposts, duties,
deductions, charges or withholdings imposed by any Governmental Authority.

     "UNITED STATES" and "U.S." each means the United States of America.

     "VENDOR"  means Cisco  Systems,  or any  distributor  or other  reseller or
provider of Cisco Products.

     "VOTING  STOCK" of any Person means the capital  stock of such Person which
ordinarily  has voting power for the election of directors,  managers or general
partners (or persons performing  similar  functions) of such Person,  whether at
all times or only for so long as no senior class of  securities  has such voting
power by reason of any contingency.

     1.2  INTERPRETATION.  (a) In the Loan  Documents,  except to the extent the
context  otherwise  requires:  (i) any  reference  to an Article,  a Section,  a
Schedule or an Exhibit is a  reference  to an article or section  thereof,  or a
schedule or an exhibit  thereto,  respectively,  and to a subsection or a clause
is,  unless  otherwise  stated,  a reference to a subsection  or a clause of the
Section or subsection in which the reference  appears;  (ii) the words "hereof,"
"herein," "hereto," "hereunder" and the like mean and refer to this Agreement or
any other  Loan  Document  as a whole and not  merely to the  specific  Article,
Section,  subsection,  paragraph or clause in which the respective word appears;
(iii) the  meaning of defined  terms  shall be  equally  applicable  to both the
singular  and plural  forms of the terms  defined;  (iv) the words  "including,"
"includes"  and "include"  shall be deemed to be followed by the words  "without
limitation;"  (v)  references to agreements  and other  contractual  instruments
shall be deemed to include all  subsequent  amendments  and other  modifications
thereto;  (vi)  references  to statutes or  regulations  are to be  construed as
including all statutory and  regulatory  provisions  consolidating,  amending or
replacing  the statute or  regulation  referred to; (vii) any table of contents,
captions and headings are for convenience of reference only and shall not affect
the construction of this Agreement or any other Loan Document; and (viii) in the
computation of periods of time from a specified date to a later  specified date,
the word "from" means "from and including"; the words "to" and "until" each mean
"to but excluding";  and the word "through" means "to and including." (b) Unless
Lender has consented in writing to an amendment, waiver or other modification of
the Financing  Documents,  or an amendment,  waiver or other modification of the
Financing  Documents  is  otherwise  permitted  under this  Agreement,  the term
"Financing  Documents"  as used herein  shall not be deemed to refer to any such
Financing  Document  as  modified  by  any  such  amendment,   waiver  or  other
modification  to such  Financing  Document  and shall  instead  mean and be such
Financing  Document  without  giving effect to such  amendment,  waiver or other
modification.  If any provision of any Financing Document is incorporated herein
by reference and such Financing Document shall terminate, the provisions thereof
referred to herein shall continue to be incorporated by reference herein, as and
to the extent applicable,  MUTATIS MUTANDIS, in each case in the form thereof on
the date of such termination.

     SECTION 2. THE LOAN FACILITY.

     2.1 THE LOANS.  Subject to  compliance  with the  conditions  precedent set
forth in  Sections  3.1 and 3.2,  Lender  agrees,  on the terms  and  conditions
hereinafter  set forth,  to make loans  (each a "Loan"  and,  collectively,  the
"Loans") to Borrower during the Availability  Period, in an aggregate  principal
amount up to but not  exceeding the  Commitment.  Any amount of the Loans repaid
may not be reborrowed.

     2.2 USE OF PROCEEDS.  Borrower agrees to use the proceeds of any Loans made
hereunder solely for the purposes described in the Schedule.

     2.3 BORROWING PROCEDURE. Each  Loan to be made  hereunder shall  be in such
minimum  principal  amount  and  subject  to such  advance  written  notice,  or
telephonic notice (confirmed  immediately in writing),  as shall be specified in
the Schedule.  Each such written notice of borrowing  shall be in  substantially
the form of EXHIBIT A (with  appropriate  completions).  Upon fulfillment of the
applicable  conditions  set forth in  Section  3.1 and 3.2,  and  subject to the
Funding  Procedures  and  Policies,  Lender  shall make the proceeds of the Loan
available in accordance with Borrower's payment  instructions.  Without limiting
the generality of the foregoing,  in the case of any Loan made hereunder for the
purpose of paying the purchase  price of Cisco  Products,  (i) Lender shall make
the Loan  available  directly  to the  Vendor,  and (ii) if the  Vendor is Cisco
Systems,  each such Loan shall be deemed to be  outstanding  hereunder and under
the Note evidencing such Loan effective as of the date 30 days after the invoice
date of the Cisco  Products  which are being  financed  by such Loan (or on such
date  thereafter as Cisco Systems  shall agree to in its sole  discretion),  and
Lender is hereby authorized to make such Loans without being required to receive
a notice of borrowing with respect thereto,  PROVIDED that if Borrower  provides
written  notice to Lender  within 25 days after the invoice date that payment or
performance  due Cisco Systems is not then due because one or more conditions of
payment or performance  has or have not been  satisfied by Cisco  Systems,  then
clause (ii) of this section shall not apply and no such Loan shall be made until
Borrower  provides a notice of borrowing with respect to such invoice.  Borrower
hereby  authorizes  and directs  Lender to make direct payment to any Vendor and
any other intended recipient, if any, of Loan proceeds. Notwithstanding anything
in the Funding  Procedures  and Policies to the contrary,  Lender will make Loan
proceeds available to any Vendor or other recipient thereof on or not later than
five Banking Days following the requested Borrowing Date.


     2.4 EVIDENCE OF INDEBTEDNESS. As additional evidence of the Indebtedness of
Borrower  to Lender  resulting  from the Loans  made by Lender,  Borrower  shall
execute and deliver the Note (or Notes) required pursuant to the Schedule.

     2.5 INTEREST AND FEES.

     (a) INTEREST. Borrower shall pay interest on the unpaid principal amount of
each Loan at the interest rate and on the dates set forth in the Note evidencing
such Loan.

     (b) FEES. Borrower agrees to pay to Lender such fees as may be specified in
the Schedule,  payable on the dates set forth in the Schedule.  All fees payable
under this Section 2.5 shall be nonrefundable.

     (c) DETERMINATIONS.  Each determination by Lender of any applicable rate of
interest,  and of any change therein,  in the absence of manifest error shall be
conclusive and binding on the parties hereto.

     2.6 COMPUTATIONS.  All computations of fees and interest hereunder shall be
made on the basis of a year of 360 days for the actual number of days  occurring
in the period for which any such interest or fee is payable.

     2.7 HIGHEST LAWFUL RATE.  Anything herein to the contrary  notwithstanding,
if during any period for which  interest is computed  hereunder,  the applicable
interest  rate,  together with all fees,  charges and other  payments  which are
treated as interest under applicable law, as provided for herein or in any other
Loan  Document,  would exceed the maximum rate of interest which may be charged,
contracted  for,  reserved,  received or collected by Lender in connection  with
this Agreement under applicable law (the "Maximum Rate"),  Borrower shall not be
obligated to pay, and Lender shall not be entitled to charge, collect,  receive,
reserve or take,  interest  in excess of the Maximum  Rate,  and during any such
period the interest payable hereunder shall be limited to the Maximum Rate.

     2.8  REPAYMENT OF THE LOANS.  Borrower  shall repay to Lender the principal
amount of each Loan in  accordance  with the  terms and  conditions  of the Note
evidencing such Loan.

     2.9 PREPAYMENTS. Borrower may prepay the outstanding amount of the Loans in
whole or in part,  in a principal  amount of at least  $100,000 or any amount in
excess  thereof.  If any mandatory  prepayments are required under the Schedule,
Borrower  shall  prepay the  outstanding  Loans in the  amounts and at the times
specified in the Schedule. Any such prepayments shall not be subject to any fee,
premium,  penalty or other charges except as provided in Section 2.12 and except
to the extent a prepayment  fee is required  under the Schedule.  Borrower shall
give prior notice to Lender of any such  prepayment  identifying  the Loan to be
prepaid  and  specifying  the  date  and  amount  of  the  prepayment.   Partial
prepayments  of any  amortizing  Loan shall be applied  to the  installments  of
principal thereof in the inverse order of maturity. Accrued interest on any such
Loan prepaid shall be due on the prepayment  date as to the principal  amount of
such Loan prepaid.

     2.10 REDUCTION OR TERMINATION OF THE  COMMITMENT.  Borrower may, upon prior
notice to Lender, terminate in whole or reduce in part, as of the date specified
by Borrower in such notice, any then unused portion of the Commitment.  From the
effective  date of any  reduction or  termination,  any  commitment  fee payable
pursuant to the Schedule  shall be computed on the basis of the Commitment as so
reduced or  terminated.  Once reduced or  terminated,  the Commitment may not be
increased or otherwise reinstated.

     2.11 INCREASED  COSTS. If, due to either (i) the adoption of, or any change
in, any applicable law, rule or regulation,  or any change in the interpretation
or  administration  thereof  by any  Governmental  Authority  charged  with  the
interpretation  or  administration  thereof  (a  "Regulatory  Change"),  or (ii)
compliance  by Lender with any request,  guideline or directive  (whether or not
having the force of law) of any such Governmental Authority,  there shall be any
increase  in the cost to Lender of  agreeing  to make or  making,  or funding or
maintaining,  any Loan, or any reduction of any amount received or receivable by
Lender under this Agreement or the Note with respect thereto,  then from time to
time,  within 15 days after demand by Lender,  Borrower shall pay to Lender such
additional  amounts  as  shall  compensate  Lender  for such  increased  cost or
reduction.  Any such request for  compensation by Lender under this Section 2.11
shall set forth the basis of  calculation  thereof and shall,  in the absence of
manifest error,  be conclusive and binding for all purposes.  In determining the
amount  of  such  compensation,  Lender  may use any  reasonable  averaging  and
attribution methods.

     2.12 FUNDING LOSSES. In addition to such amounts as are required to be paid
by Borrower pursuant to the Schedule, Borrower shall compensate Lender, promptly
upon receipt of Lender's  written  request,  for all losses,  costs and expenses
(including  any  reasonable  loss or expense  incurred  by Lender in  obtaining,
liquidating  or  re-employing  deposits or other  funds to fund or maintain  the
Loans),  if any,  which Lender  sustains if: (i) Borrower  repays or prepays any
Loan on a date  other  than the last day of an  Interest  Period  for such  Loan
(whether  as a result of an  optional  prepayment,  a  mandatory  prepayment,  a
payment  as a result of  acceleration  or  otherwise)  (except  in the case of a
scheduled  payment of an  installment  of principal on a principal  payment date
which does not fall on the last day of an Interest Period);  (ii) Borrower fails
to borrow a Loan after  giving its notice of  borrowing  under  Section  2.3; or
(iii) Borrower fails to prepay a Loan after giving its notice thereof.  Any such
request  for  compensation  shall  set  forth  the  basis  for  requesting  such
compensation  and shall,  in the absence of manifest  error,  be conclusive  and
binding for all purposes. As used herein,  "Interest Period" has the meaning set
forth in the Note(s).

     2.13 RIGHTS OF CSCC/ASSIGNEE   Notwithstanding  anything to the contrary in
Sections 2.11 and 2.12, such Sections shall not apply to any Loans held by Cisco
Systems Capital Corporation (or an Affiliate  thereof),  as Lender, but shall be
in full force and effect with  respect to any Loans held by a Lender  other than
Cisco Systems Capital  Corporation (or an Affiliate  thereof) and shall inure to
the benefit of any assignee  receiving the  assignment of a Loan (or any portion
thereof) under the terms of this Agreement.

     2.14  PAYMENTS.  Borrower  shall make each payment under the Loan Documents
unconditionally  in full and free and clear of, and without  reduction for or on
account of, any present and future Taxes or  withholdings,  and all  liabilities
with  respect  thereto.  Each  such  payment  shall  be  made  without  set-off,
counterclaim  or, to the extent  permitted by  applicable  law,  other  defense,
including  without any deduction or setoff arising out of or in connection  with
the  purchase of the  Financed  Products,  all of which  rights of Borrower  are
hereby  expressly  waived  by  Borrower;  provided,  however,  that  no  payment
hereunder shall be deemed to be a waiver of any right or claim that Borrower may
have against Cisco  Systems or other Vendor with respect to the Cisco  Products.
Each such payment  shall be made on the day when due to Lender in Dollars and in
immediately available funds, to Lender's account specified in the Schedule or to
such other bank and/or account of Lender as it from time to time shall designate
in a written notice to Borrower.  Whenever any payment hereunder shall be stated
to be due, or whenever any other date specified hereunder would otherwise occur,
on a day other than a Banking Day, then, except to the extent otherwise provided
hereunder,  such payment shall be made, and such other date shall occur,  on the
next succeeding  Banking Day. Each payment by or on behalf of Borrower hereunder
shall,  unless a specific  determination is made by Lender with respect thereto,
be applied (i) first, to any fees, costs, expenses and other amounts (other than
principal and interest) due Lender;  (ii) second, to accrued and unpaid interest
due Lender; and (iii) third, to principal due Lender.

     SECTION 3. CONDITIONS PRECEDENT.

     3.1  CONDITIONS  PRECEDENT TO THE INITIAL LOAN. The obligation of Lender to
make its Loan on the initial Borrowing Date shall be subject to the satisfaction
of each of the following  conditions  precedent before or concurrently  with the
making of such initial Loan:

     (a)  DOCUMENTS.  Lender  shall have  received  the  following,  in form and
substance  satisfactory  to it:  (i) the  Note (or  Notes)  required  under  the
Schedule,  executed by Borrower;  (ii) any required  Guaranty and any additional
Loan  Documents  specified in the Schedule,  executed by each of the  respective
parties thereto, and (iii) any other documents and information  specified in the
Schedule.

     (b) ADDITIONAL CLOSING DOCUMENTS. Lender shall have received the following,
in form and  substance  satisfactory  to it: (i) evidence  that all approvals or
consents  of any  other  Person,  required  in  connection  with the  execution,
delivery and  performance  of the Loan Documents  shall have been obtained;  and
(ii) a certificate  of the Secretary or other  appropriate  officer of each Loan
Party,  dated the Closing  Date, or a date not more than five Banking Days prior
to the Closing Date,  certifying  (A) copies of the  certificate  or articles of
incorporation and bylaws of such Loan Party and the resolutions  adopted by such
Loan Party and other actions taken or adopted by such Loan Party authorizing the
execution,  delivery  and  performance  of  the  Loan  Documents,  and  (B)  the
incumbency,  authority  and  signatures  of  each  officer  of such  Loan  Party
authorized  to execute  and  deliver  the Loan  Documents  and act with  respect
thereto.

     (c) LEGAL  OPINION.  Lender  shall have  received a legal  opinion of legal
counsel to the Loan  Parties,  dated the Closing  Date,  or a date not more than
five Banking Days prior to the Closing Date, in form and substance  satisfactory
to Lender.

     (d)  COLLATERAL.  If  any  Collateral  Documents  are  referred  to in  the
Schedule,  Lender  shall have  received  the  following,  in form and  substance
satisfactory  to it:  (i)  executed  copies  of all UCC-1  financing  statements
necessary or  appropriate  in the  reasonable  opinion of Lender and  Collateral
Agent to perfect the security interests created under the Collateral  Documents;
(ii) written  advice  relating to such Lien and judgment  searches as Lender and
Collateral Agent shall have requested,  and such termination statements or other
documents,  as may be necessary to confirm that the Collateral  described in the
Collateral Documents is subject to no other Liens in favor of any Persons (other
than  Permitted  Liens);  (iii)  evidence  that all other  actions  necessary or
appropriate in the reasonable  opinion of Lender and Collateral Agent to perfect
and protect the security interest created by the Collateral  Documents have been
taken;  and (iv)  evidence of insurance  coverage,  together  with evidence that
Collateral  Agent has been named as loss payee  under all  policies  of property
insurance and as additional  insured under all policies of liability  insurance,
in each case as required by the Collateral Documents.

     (e) FEES,  COSTS AND EXPENSES.  Borrower  shall have paid (i) all fees then
due in accordance  with the Schedule,  and (ii) all invoiced  costs and expenses
then due in accordance with Section 7.4.

     (f)  COMPLIANCE  CERTIFICATE.   Lender  shall  have  received  a  completed
Compliance  Certificate of a Responsible  Officer of Borrower,  as of the end of
the fiscal quarter  immediately  preceding the Closing Date, with respect to any
of the financial covenants set forth in Section 5.1 in effect as of such date.

     (g)  MATERIAL  CONTRACTS.  If  requested  by  Lender,  Borrower  shall have
delivered  to Lender a complete and current  copy of each  Material  Contract in
existence  as of the  Closing  Date,  except  that  Borrower  shall not have any
obligation to deliver such  Material  Contract if such delivery is prohibited by
the terms of such Material  Contract and if such  prohibition  was required by a
party other than Borrower or any of its Subsidiaries.

     3.2  CONDITIONS  PRECEDENT TO ALL LOANS.  The  obligation of Lender to make
each  Loan  shall  be  subject  to the  satisfaction  of each  of the  following
conditions precedent:

     (a) USE OF PROCEEDS. Lender shall have received details with respect to the
use of proceeds  of the Loan at least five  Banking  Days prior to the  proposed
funding  date  (in the  form of a  schedule  or other  listing  of the  Financed
Products  or  otherwise  in a form as shall be  specified  by  Lender  or in the
Funding Procedures and Policies),  and the foregoing (including the proposed use
of proceeds) shall be satisfactory to Lender.

     (b)  REPRESENTATIONS  AND WARRANTIES;  NO DEFAULT. On and as of the date of
such Loan, both before and after giving effect thereto and to the application of
proceeds therefrom:  (i) the representations and warranties contained in Section
4.1 and in the other Loan  Documents  shall be true,  correct  and  complete  as
though made on and as of such date  (unless they  expressly  refer to an earlier
date, in which case they shall be true,  complete and correct as of such earlier
date); and (ii) no Default shall have occurred and be continuing or shall result
from the making of such Loan. For purposes of this Section 3.2, clause (i) shall
take into account any amendments to any disclosures  made in writing by any Loan
Party to Lender after the Closing Date and approved by Lender. The giving of any
notice of borrowing and the  acceptance by Borrower of the proceeds of each Loan
made following the Closing Date shall each be deemed a  certification  to Lender
that on and as of the date of such Loan such statements are true.

     (c)  MATERIAL  ADVERSE  CHANGE.  On and as of the date of such Loan,  there
shall have occurred no Material  Adverse  Change since the date of the financial
statements furnished to Lender prior to the Closing Date.

     (d) CLOSING DATE. The Closing Date has occurred.

     (e) ADDITIONAL  DOCUMENTS AND  CONDITIONS.  Lender shall have received,  in
form and substance  satisfactory  to it, such  additional  approvals,  opinions,
documents and other information as Lender may reasonably request,  including any
specified in the Schedule;  and any additional conditions precedent set forth in
the Schedule shall have been satisfied.

     SECTION 4. REPRESENTATIONS AND WARRANTIES.

     4.1  REPRESENTATIONS  AND  WARRANTIES  OF HOLDINGS AND  BORROWER.  Borrower
represents and warrants to Lender that:

     (a) ORGANIZATION AND POWERS.  Borrower (i) is a corporation duly organized,
validly  existing and in good standing under the laws of the jurisdiction of its
incorporation,  (ii) has all requisite power and authority to own its assets and
carry on its business and to execute,  deliver and perform its obligations under
the Loan Documents to which it is a party, (iii) is qualified to do business and
is in good standing in each  jurisdiction  in which the failure so to qualify or
be in good standing would result in a Material  Adverse  Change,  and (iv) is in
compliance  with  all  Requirements  of Law,  except  to the  extent  that  such
noncompliance  could not reasonably be expected to result in a Material  Adverse
Change.

     (b) AUTHORIZATION;  NO CONFLICT. The execution, delivery and performance by
Borrower of the Loan Documents to which it is a party have been duly  authorized
by all  necessary  corporate  action  of  Borrower  and do not and  will not (i)
contravene the terms of the articles or certificate of incorporation, or bylaws,
of Borrower or result in a breach of or  constitute a default under any Material
Contract or any material lease, instrument, contract or other agreement to which
Borrower is a party or by which it or its  properties  may be bound or affected;
or (ii) violate any provision of any law,  rule,  regulation,  order,  judgment,
decree or the like binding on or affecting Borrower.

     (c) BINDING  OBLIGATIONS.  The Loan  Documents to which Borrower is a party
constitute, or when delivered under this Agreement will constitute, legal, valid
and binding obligations of Borrower,  enforceable against Borrower in accordance
with  their  respective  terms,  except as limited  by  bankruptcy,  insolvency,
reorganization,  moratorium  and other  similar  laws  relating to or  affecting
creditors' rights generally and by general equity principles.

     (d) CONSENTS. No authorization,  consent, approval,  license, exemption of,
or filing or  registration  with,  any  Governmental  Authority,  or approval or
consent of any other  Person,  is required  for the due  execution,  delivery or
performance  by any Loan Party of any of the Loan  Documents  or the purchase of
the Financed Products, except as may be set forth in the Schedule and except for
any filings necessary to perfect any Liens on any Collateral.

     (e)  LITIGATION.  Except for the Magten  Litigation,  there are no actions,
suits or proceedings pending or, to the best of Borrower's knowledge, threatened
against or affecting Borrower or any of its Subsidiaries before any Governmental
Authority or arbitrator  which if  determined  adversely to Borrower or any such
Subsidiary would result in a Material Adverse Change.

     (f)  FINANCIAL  STATEMENTS.  All  financial  statements of Borrower and its
Subsidiaries delivered to Lender are complete and correct and fairly present the
financial condition of Borrower and its Subsidiaries as at the times and for the
periods  covered  by such  statements,  in each case in  accordance  with  GAAP,
consistently   applied,   subject,  in  the  case  of  any  unaudited  financial
statements,  to normal year-end  adjustments and any absence of notes. Since the
date of the most recent  financial  statements  furnished to Lender prior to the
Closing Date, there has not been any Material Adverse Change.

     (g) PURCHASE TRANSACTION. Each purchase transaction to be financed with any
Loan represents a bona fide and undisputed  transaction between Borrower and the
Vendor  (or  other  applicable  vendor of  Financed  Products)  entered  into in
compliance with all applicable laws and regulations.

     (h) SUBSIDIARIES.  Except as set forth in the Schedule, on the date of this
Agreement Borrower has no Subsidiaries.

     (i) LICENSES,  PATENTS,  TRADEMARKS AND OTHER RIGHTS.  Each of Borrower and
its  Subsidiaries  possesses all material  approvals,  authorizations,  permits,
franchises,   licenses,  patents,   trademarks,   trade  names,  service  marks,
copyrights,  leases and all rights with respect  thereto,  free from  burdensome
restrictions,  that are reasonably necessary for the ownership,  maintenance and
operation of its business,  and neither  Borrower nor any such  Subsidiary is in
material  violation  of any  rights of others  with  respect  to the  foregoing.
Without  limiting the generality of the  foregoing,  the Schedule sets forth all
material authorizations,  permits,  licenses and approvals of or from the FCC or
any other Governmental  Authority  ("Permits and Licenses") held by Borrower and
each Subsidiary  existing on the date of this Agreement  (other than Permits and
Licenses  pertaining to  construction or rights of way); each Permit and License
is in full force and effect and has not been revoked,  suspended,  canceled,  or
modified in any  materially  adverse way and,  except as may be set forth in the
Schedule,  is not subject to any materially  adverse conditions or requirements;
and  Borrower has no knowledge of the  occurrence  of any event  (including  any
investigation, proceeding, notice, violation, or other order or complaint issued
by or before and  Governmental  Authority) which (i) results in, or after notice
or  lapse of time or both  would  result  in,  revocation,  suspension,  adverse
modifications,  non-renewal, impairment, restriction, loss or termination of, or
order of  forfeiture  with respect to, any Permit or License in any respect that
could  reasonably be expected to result in a Material  Adverse  Change,  or (ii)
affects  or could  reasonably  be  expected  in the  future to affect any of the
rights of Borrower or any of its Subsidiaries under any Permit or License in any
respect  that could  reasonably  be  expected  to result in a  Material  Adverse
Change.

     (j) INSURANCE. The properties of Borrower and its Subsidiaries are insured,
with financially sound and reputable insurance companies,  in such amounts, with
such deductibles and covering such risks as is customarily  carried by companies
engaged in similar  businesses and owning  similar  properties in the localities
where Borrower or such Subsidiary operates.

     (k) TAXES.  Borrower and its Subsidiaries  have filed all federal and other
material  tax  returns  and  reports  required  to be filed,  have  made  timely
remittance of all material amounts as required by any Governmental Authority and
have paid all  federal and other  material  Taxes,  assessments,  fees and other
governmental charges levied or imposed upon them or their properties,  income or
assets  otherwise  due and  payable,  except  those  which  are being or will be
contested  in good  faith by  appropriate  proceedings  and for  which  adequate
reserves have been provided in accordance  with GAAP.  Borrower has not received
any notice of any proposed tax assessment  against Holdings,  Borrower or any of
Borrower's  Subsidiaries  that  would,  if made,  result in a  Material  Adverse
Change.

     (l) LIENS.  There are no Liens upon or with respect to any of properties or
assets of Borrower and its Subsidiaries, including any of the Collateral, except
for Permitted Liens.

     (m) REGULATED ENTITIES. None of Holdings,  Borrower, any Person controlling
Holdings,  or any Subsidiary of Borrower or Holdings, is an "Investment Company"
within  the  meaning of the  Investment  Company  Act of 1940.  No Loan Party is
subject to regulation  under the Public Utility Holding Company Act of 1935, the
Federal  Power Act, the  Interstate  Commerce Act, or any other Federal or state
statute or regulation limiting its ability to incur Indebtedness.

     (n) MATERIAL CONTRACTS. All of the Material Contracts are in full force and
effect and, to the best  knowledge of Borrower,  (i) no Loan Party is in default
in any material respect under the terms of a Material Contract and (ii) no other
Person who is a party to a  Material  Contract  is in  default  in any  material
respect under the terms of such Material  Contract except such defaults as would
not reasonably be expected to result in a Material Adverse Change.

     (o) DISCLOSURE.  (i) Borrower has disclosed to Lender the existence,  as of
the date of this Agreement, of each credit agreement, loan agreement, indenture,
purchase agreement,  guarantee,  letter of credit or other arrangement providing
for or otherwise  relating to any  Indebtedness  or any  extension of credit (or
commitment for any extension of credit) to, or guarantee by,  Borrower or any of
its  Subsidiaries  the  aggregate  principal  or face amount of which  equals or
exceeds (or may equal or exceed)  $100,000 and any Liens with  respect  thereto.
(ii) None of the  representations  or  warranties  made by any Loan Party in the
Loan Documents as of the date of such  representations and warranties,  and none
of the statements  contained in any other  information  with respect to Borrower
and its  Subsidiaries,  including  each  exhibit or report,  furnished  by or on
behalf of Borrower to Lender in connection with the Loan Documents, contains any
untrue  statement of a material  fact or omits any material  fact required to be
stated therein or necessary to make the statements made therein, in the light of
the circumstances under which they are made, not misleading.

     4.2  REPRESENTATIONS  AND  WARRANTIES  OF  LENDER.  Lender  represents  and
warrants to Borrower that Lender: (i) will acquire each Note for its own account
for  investment  and (subject to the  disposition  of its property  being at all
times within its control) not with a view to any resale or other distribution of
such Note in a transaction constituting a public offering or otherwise requiring
registration  under the  Securities Act of 1933 (the  "Securities  Act") or in a
transaction that would result in noncompliance  with applicable state securities
laws;  (ii) has such knowledge and experience in financial and business  matters
as to be capable of evaluating  the merits and the risks of its  acquisition  of
any Note and credit extensions to Borrower,  (iii) is an accredited  investor as
such term is defined in Rule 501 of Regulation D under the  Securities  Act, and
(iv) understands that such Note has not been, and will not be,  registered under
the Securities Act or any state securities laws.

     SECTION 5. COVENANTS.

     5.1  COVENANTS.  So long as any of the  Obligations  shall remain unpaid or
Lender shall have any Commitment, Borrower agrees that:

     (a) FINANCIAL  STATEMENTS AND OTHER INFORMATION.  Borrower shall furnish to
Lender:  (i) as soon as available  and in any event within 45 days after the end
of the  first  three  fiscal  quarters  of each  fiscal  year of  Borrower,  its
quarterly consolidated  financial statements,  prepared in accordance with GAAP,
and, if requested by Lender, its quarterly  consolidating  financial statements,
accompanied by a certificate of a Responsible  Officer of Borrower  stating that
such financial statements fairly present the financial condition of Borrower and
its  Subsidiaries  as at such date and the results of operations of Borrower and
its  Subsidiaries  for the period  ended on such date and have been  prepared in
accordance  with GAAP  consistently  applied,  subject to changes  from  normal,
year-end  adjustments  and  except  for the  absence  of notes,  (ii) as soon as
available  and in any event within 105 days after the end of each fiscal year of
Borrower,  its consolidated annual financial statements,  prepared in accordance
with  GAAP  and,  if  requested  by  Lender,   consolidating   annual  financial
statements, and in the case of consolidated financial statements, accompanied by
an unqualified  report thereon of independent  certified  public  accountants of
recognized  standing;  (iii) as soon as available and in any event not more than
105 days after the  commencement  of each fiscal  year,  the  business  plan and
financial  projections of Borrower and its  Subsidiaries,  for such fiscal year;
(iv) promptly after  Borrower has knowledge or becomes aware thereof,  notice of
(A) the  occurrence  of any Default  hereunder,  and (B) any default or event of
default  under  any  Financing  Documents;  (v)  prompt  written  notice  of any
condition or event which has resulted,  or that could  reasonably be expected to
result,  in  a  Material  Adverse  Change;  (vi)  together  with  the  financial
statements  required pursuant to clauses (i) and (ii), a Compliance  Certificate
of a Responsible Officer of Borrower as of the end of the applicable  accounting
period; and (vii) such other information respecting the operations,  properties,
business or financial condition of Borrower and their Subsidiaries as Lender may
from time to time reasonably request or as may be specified in the Schedule.

     (b) PRESERVATION OF EXISTENCE, ETC. Borrower shall, and shall cause each of
its Subsidiaries to, maintain and preserve (i) its corporate existence, and (ii)
all material copyrights,  patents, trademarks, trade names and service marks and
other   intellectual   property   rights,   and  all  other   material   rights,
qualifications,  permits,  licenses,  franchises  and  privileges,  necessary or
desirable in the normal course of its business and  operations and the ownership
of its properties, except for the dissolution of any shell or dormant Subsidiary
and except in  connection  with any  transactions  expressly  permitted  by this
Section 5.1.

     (c) LICENSES.  Borrower shall, and shall cause each of its Subsidiaries to,
obtain and maintain all licenses, authorizations, consents, filings, exemptions,
registrations  and other  governmental  approvals  of any  Government  Authority
necessary  or  desirable  (i) in  connection  with the  execution,  delivery and
performance of the Loan Documents,  the purchase of the Financed Products or the
consummation of the  transactions  therein  contemplated,  or (ii) in the normal
course of its  business and  operations  and the  ownership  of its  properties,
except, in the case of this clause (ii), to the extent that the failure to do so
could not reasonably be expected to result in a Material Adverse Change.

     (d) COMPLIANCE  WITH LAWS.  Borrower shall comply,  and shall cause each of
its  Subsidiaries to comply,  in all material  respects with all Requirements of
Law of any Governmental  Authority having  jurisdiction over it or its business,
except such as may be contested in good faith or as to which a bona fide dispute
may exist or where noncompliance could not reasonably be expected to result in a
Material Adverse Change.

     (e) PAYMENT OF  OBLIGATIONS.  Borrower  shall,  and shall cause each of its
Subsidiaries  to, pay and  discharge (i) all federal and other  material  Taxes,
fees, assessments and governmental charges or levies imposed upon it or upon its
properties or assets prior to the date on which penalties  attach  thereto,  and
all lawful claims for labor,  materials  and supplies  which,  if unpaid,  might
become  a  Lien  upon  any  properties  or  assets  of  Borrower  or  any of its
Subsidiaries, except to the extent such Taxes, fees, assessments or governmental
charges  or  levies,  or such  claims,  are  being  contested  in good  faith by
appropriate  proceedings and are adequately  reserved against in accordance with
GAAP; (ii) all lawful claims which,  if unpaid,  would by law become a Lien upon
its property not constituting a Permitted Lien; and (iii) all  Indebtedness,  as
and when due and payable, but subject to any subordination  provisions contained
in any  instrument  or agreement  evidencing  such  Indebtedness  (except  where
failure to do so would not  otherwise  constitute  a Default or Event of Default
hereunder).

     (f) INSURANCE. Borrower shall, and shall cause each of its Subsidiaries to,
carry  and  maintain  in full  force and  effect,  at its own  expense  and with
financially sound and reputable insurance companies,  insurance in such amounts,
with such  deductibles  and  covering  such risks as is  customarily  carried by
companies  engaged  in  the  same  or  similar  businesses  and  owning  similar
properties in the localities where Borrower or such Subsidiary operates. Without
limiting the generality of the foregoing,  Borrower shall,  and shall cause each
of its Subsidiaries to, comply with all requirements of the Collateral Documents
pertaining to maintenance of insurance.

     (g) CHANGE IN NATURE OF BUSINESS.  Borrower shall not, and shall not permit
any of its  Subsidiaries  to, engage in any material line of business other than
that of being a telecommunications services provider through the Network.

     (h) RESTRICTIONS ON FUNDAMENTAL CHANGES.  Borrower shall not, and shall not
permit any of its  Subsidiaries  to, merge with or consolidate  into, or acquire
all or substantially all of the assets of, any Person, or sell, transfer,  lease
or  otherwise  dispose  of  (whether  in  one  transaction  or  in a  series  of
transactions)  all or  substantially  all of its assets,  except that (i) any of
Borrower's  wholly  owned  Subsidiaries  may  merge  with,  consolidate  into or
transfer all or substantially  all of its assets to another of Borrower's wholly
owned  Subsidiaries  or to Borrower and in connection  therewith such Subsidiary
may be liquidated or dissolved  (provided that if any such transaction  shall be
between  an  Additional  Borrower  and  another  Subsidiary  not  an  Additional
Borrower,  or a Subsidiary  which is a Guarantor and a Subsidiary which is not a
Guarantor,  and such  Additional  Borrower or  Subsidiary  Guarantor  is not the
continuing or surviving  Person,  then the continuing or surviving  Person shall
have assumed all of the  obligations of such  Additional  Borrower or Subsidiary
Guarantor, as the case may be, under the Loan Documents to which it is a party);
(ii) Borrower or any of its Subsidiaries may enter into a Permitted Transaction;
(iii)  Borrower  or any of its  Subsidiaries  may sell or  dispose  of assets in
accordance with the provisions of subsection (i) below;  and (iv) subject to any
restrictions set forth in subsection (i) below regarding Fiber or Conduit Sales,
the  Borrower or PRE may purchase or acquire  Fiber or Conduit that  constitutes
all or a material or substantial  part of the business or properties of a Person
pursuant to a purchase, swap or exchange agreement.

     (i) SALES OF ASSETS.  Borrower  shall not,  and shall not permit any of its
respective  Subsidiaries  to, sell,  lease,  transfer,  or otherwise  dispose of
(whether in one transaction or a series of transactions)  any assets  (including
any shares of stock in any  Subsidiary  or other  Person)  outside the  ordinary
course of business (each a "Transfer"), or enter into or consummate any Transfer
(i) to be  made  by  Borrower  or any  Subsidiary  to  Holdings  (other  than as
permitted by Section 5.1((m)),  (ii) involving  Financed Products (other than in
the ordinary course of business to a wholly owned Subsidiary that is a Guarantor
hereunder  and that has granted to Lender a perfected,  first  priority  Lien on
such  Financed  Products  under  a  security  agreement  in form  and  substance
satisfactory to Lender (except as permitted by Clause (b) to this Section 5.1(i)
below)), (iii) that could reasonably be expected to result in a Material Adverse
Change or (iv) that would violate the terms of any other Loan Document; provided
that as a condition  to  consummating  any  Transfer to any such  Subsidiary  of
Financed Products other than PFE, Borrower shall provide ten Banking Days' prior
written  notice to Lender of the  proposed  Transfer and obtain  Lender's  prior
written consent thereto.  For purposes of this Section 5.1(i), the term ordinary
course of  business  shall  include,  without  limitation,  (a)  sales,  leases,
transfers,  assignments,  or other  dispositions  of  property,  other  than the
Network (or any portion thereof),  Fiber, Conduit,  accounts or receivables,  by
the Borrower or its  Subsidiaries if each of the following  conditions have been
satisfied:  (i)(A) the net proceeds from any such single sale, lease,  transfer,
assignment or other disposition or series of related sales,  leases,  transfers,
assignments or other  dispositions  shall not exceed $5,000,000 in the aggregate
at any time and (B) the Borrower or any Subsidiary (as applicable) receives fair
consideration  for such assets;  and (ii) no Default exists at the time thereof;
(b) sales,  leases,  transfers,  assignments or other  dispositions of property,
accounts and  receivables,  by any Loan Party to any other Loan Party; (c) Fiber
or Conduit Sales pursuant to Customer Agreements for full and fair consideration
in the  ordinary  course of  Borrower's  business and in  accordance  with or as
contemplated  by the Business  Plan,  PROVIDED that Borrower will ensure that it
and its  Subsidiaries  retain,  at all times, the ownership of or right to use a
minimum of six strands of Fiber with  respect to each  long-haul  segment of the
Network,  PROVIDED,  HOWEVER,  that,  in  connection  with any Fiber or  Conduit
Purchases, Borrower and its Subsidiaries may acquire and retain a minimum of two
strands of Fiber  installed  or intended to be  installed  in the  Network;  (d)
dispositions  of an entire  operating  segment of the  Network  if (i)  Borrower
receives fair consideration for such segment of the Network disposed of and (ii)
no Default exists at the time of or will result from such disposition, PROVIDED,
HOWEVER,  that,  as of any  date of  determination,  not  more  than  20% of the
aggregate  amount of  completed  Network  route  miles at any time owned or then
previously owned by Borrower and its  Subsidiaries  (excluding any Network route
miles exchanged for other Network route miles) may be, or have been, disposed of
after giving effect to all previous dispositions and all dispositions being made
or proposed to be made as of such date of determination; and (e) sales or leases
of customer  premises  equipment or sublicenses of software,  or other equipment
purchased by Borrower and  intended for resale,  made in the ordinary  course of
business;  PROVIDED  that any such  equipment  or software  shall not consist of
Cisco Products.

     (j) NEGATIVE  PLEDGE.  Borrower  shall not, and shall not permit any of its
respective  Subsidiaries to, create,  incur,  assume or suffer to exist any Lien
upon or with respect to any of its properties,  revenues or assets,  whether now
owned or hereafter acquired, other than Permitted Liens.

     (k)  INDEBTEDNESS.  Borrower  shall  not,  and shall not  permit any of its
Subsidiaries to, create,  incur, assume or otherwise become liable for or suffer
to exist any  Indebtedness,  other than: (i) Indebtedness of Borrower to Lender;
(ii)  Indebtedness of Borrower and its Subsidiaries  existing on the date hereof
and disclosed to Lender, or incurred pursuant to subsection  5.1(k)(xiv)  below,
or extensions, renewals and refinancings of such Indebtedness, provided that the
principal amount of such Indebtedness being extended, renewed or refinanced does
not increase;  (iii)  Indebtedness  of Borrower and its  Subsidiaries  under the
Financing  Documents (if any) or any  refinancings,  extensions  and renewals of
such Indebtedness, provided that the principal amount of such Indebtedness being
extended,   renewed  or  refinanced   does  not  increase;   (iv)   Indebtedness
constituting  Eligible Secured Debt; (v) accounts payable to trade creditors for
goods and  services  and current  operating  liabilities  (not the result of the
borrowing of money)  incurred in the ordinary course of Borrower's or any of its
Subsidiary's  business in accordance  with  customary  terms and paid within the
specified time,  unless  contested in good faith by appropriate  proceedings and
reserved for in accordance with GAAP; (vi)  Indebtedness of Borrower incurred to
finance  the  acquisition,  construction,  installation  or  improvement  of any
capital assets;  PROVIDED that (A) such Indebtedness is incurred within 270 days
of such  acquisition or the  completion of such  construction,  installation  or
improvement,   (B)  any  such  Indebtedness  incurred  in  connection  with  any
particular  acquisition,  construction,  installation  or improvement  shall not
exceed  100% of the  cost of such  acquisition,  construction,  installation  or
improvement,  and  (C)  the  aggregate  principal  amount  of  all  Indebtedness
permitted by this  subsection  5.1(k)(vi)  or a  refinancing  thereof  shall not
exceed  $1,000,000 at any time  outstanding,  (vii)  Indebtedness  consisting of
guarantees  resulting from endorsement of negotiable  instruments for collection
by Borrower or any such  Subsidiary in the ordinary  course of business;  (viii)
purchase money Indebtedness of Borrower and its Subsidiaries  (including capital
leases)  secured by  purchase  money  Liens,  which  Indebtedness  and Liens are
permitted  under  and  meet  all of the  requirements  of  clause  (vii)  of the
definition  of Permitted  Liens in Section 1.1; (ix)  Indebtedness  constituting
Subordinated Debt of Borrower or a refinancing  thereof (as permitted under this
Agreement);  (x)  Indebtedness  between or among  Borrower or any of  Borrower's
wholly  owned   Subsidiaries   to  Borrower  or  another  of  its  wholly  owned
Subsidiaries   (subordinated   to  the  payment  of  the  Obligations  on  terms
satisfactory  to Lender);  (xi)  Indebtedness  of Borrower and its  Subsidiaries
consisting of Qualifying Fiber or Conduit Purchases entered into in the ordinary
course of business;  (xii) unsecured Indebtedness under Interest Rate Protection
Agreements  permitted  under  the  Financing   Documents;   (xiii)  Indebtedness
constituting  of guaranties  by Borrower of  Indebtedness  of its  Subsidiaries,
other than PRE,  permitted  pursuant to this  Agreement and Guaranties by any of
Borrower's  Subsidiaries,  other than PRE, of Indebtedness of Borrower permitted
pursuant to this Agreement;  and (xiv) additional Indebtedness of Borrower in an
aggregate  principal  amount not to exceed  $1,000,000 at any time  outstanding.
Notwithstanding  the  foregoing  or anything to the  contrary  contained in this
Agreement,  Borrower  shall not, and shall not permit any Subsidiary of Borrower
to, incur,  create,  assume or permit to exist any Indebtedness which is secured
by any Lien created,  evidenced or governed by any of the  Collateral  Documents
other than the Obligations and other Eligible Secured Debt.

     (l) LOANS AND INVESTMENTS. Except as otherwise permitted in Sections 5.1(h)
or 5.1(i),  Borrower shall not, and shall not permit any of its Subsidiaries to,
purchase or otherwise acquire the capital stock, assets (constituting a business
unit),  obligations  or other  securities  of or any interest in any Person,  or
otherwise extend any credit to or make any additional investments in any Person,
other  than in  connection  with:  (i)  extensions  of credit  in the  nature of
accounts  receivable  or notes  receivable  arising  from the  sales of goods or
services in the ordinary  course of business;  (ii) (A)  extensions of credit by
Holdings to, and other  investments by Holdings in, Borrower,  provided that any
such  Indebtedness  is  subordinated  to the payment of the Obligations on terms
satisfactory  to Lender,  (B)  extensions  of credit by  Borrower  to, and other
investments  by  Borrower  in,  any  of its  wholly  owned  Subsidiaries  or (C)
extensions of credit by any of Borrower's  wholly owned  Subsidiaries to another
of  its  wholly  owned  Subsidiaries  or  Borrower;  (iii)  employee  loans  and
guarantees in the ordinary  course of business in accordance  with Borrower's or
any of its Subsidiary's usual and customary  practices with respect thereto that
do not exceed $1,000,000 in aggregate amount at any one time  outstanding;  (iv)
short term,  investment grade  instruments,  in accordance with Borrower's usual
and  customary  treasury  management  policies;  (v)  Interest  Rate  Protection
Agreements  permitted  by  the  Financing  Documents;  and  (vi)  any  Permitted
Transaction.

     (m) DISTRIBUTIONS. Borrower shall not, and shall not permit any of its
Subsidiaries  to, make or pay, or obligate itself to make or pay, any Restricted
Payments,  except: (i) subject to the subordination provisions relating thereto,
Borrower may make (and may obligate itself to make) regularly scheduled payments
of interest accrued on any  Subordinated  Debt if and to the extent (but only if
and to the extent)  permitted  by the  express  terms of the  Subordinated  Debt
Documents  governing  such  Subordinated  Debt,  which  terms  shall  have  been
expressly approved in writing by Lender;  (ii) Subsidiaries of Borrower may make
Restricted  Payments to Borrower;  (iii)  commencing  on or after March 15, 2001
(but not prior  thereto),  if and to the extent  permitted  by  applicable  law,
Borrower  may  declare  and pay (and may  obligate  itself to  declare  and pay)
dividends  to  Holdings  during any fiscal  year in an  aggregate  amount not to
exceed the positive  remainder,  if any, of (A) the accrued  interest on the PNI
Senior Notes required to be paid in cash in accordance with the PNI Senior Notes
Indenture and,  subject to the proviso below,  actually paid in cash by Holdings
or PNI,  MINUS (B) the aggregate  amount of cash that is otherwise  available to
PNI or  Holdings at such time for the payment of such  accrued  interest,  which
amount  referred  to in this clause (B) shall be  determined  in good faith from
time to time by PNI and Holdings  and shall be certified by the chief  financial
officer  of each of such  entities  to Lender  and  Borrower  as being  true and
correct  at  least 30 days  prior to the date  upon  which  such  dividends  are
proposed to be paid by  Borrower,  provided,  HOWEVER,  that the entirety of the
proceeds of such dividends  must be used,  substantially  concurrently  with the
payment of such dividends by Borrower, by Holdings or PNI to pay the same amount
of accrued  interest on the PNI Senior Notes  required to be paid in  accordance
with the PNI Senior Notes  Indenture,  and actually  paid, by Holdings or PNI in
cash (and no such  dividends  may be paid by Borrower  to Holdings  more than 30
days prior to the applicable  date upon which such accrued  interest is required
to be paid and is actually  paid by Holdings or PNI or in amounts  exceeding the
amounts  of such  accrued  interest  required  to be paid and  actually  paid by
Holdings in cash);  and (iv)  Borrower  and its  Subsidiaries  may make loans or
advances to  employees,  officers and directors of the Loan Parties as set forth
in Section 5.1(l);  PROVIDED that no Restricted Payments may be made pursuant to
clause (i),  clause (ii) or clause (iii)  preceding  if a Default  exists at the
time of such Restricted Payment or would result therefrom.

     (n)  ADDITIONAL  SUBSIDIARIES.  (i) If Borrower  proposes  to  incorporate,
create or acquire  any  additional  Subsidiary,  Borrower  shall  notify  Lender
thereof.   After  the  incorporation,   creation  or  acquisition  of  any  such
Subsidiary,  within  five  Banking  Days  following  receipt  by  Borrower  from
Collateral  Agent of a security  agreement and stock pledge  agreement,  each in
form and substance  satisfactory to Lender and Collateral  Agent, and a guaranty
of the  Obligations in form and substance  satisfactory to Lender and Collateral
Agent,  Borrower  shall (A) cause such  Subsidiary  to execute and deliver  such
guaranty and security  agreement to Collateral Agent and (B) pledge (or cause to
be pledged) the capital stock or other ownership interests of such Subsidiary to
Collateral  Agent pursuant to such stock pledge  agreement.  Lender may elect in
its sole  discretion to waive any such  requirement for any Subsidiary that will
remain a dormant  or shell  Subsidiary.  (ii)  Within  five  Banking  Days after
receipt from Collateral  Agent of any request to do so, Borrower shall, or shall
cause such Subsidiary to, have executed and filed any UCC-1 financing statements
furnished  by  Collateral  Agent in each  jurisdiction  in which such  filing is
necessary to perfect the security interest of Collateral Agent in the Collateral
of such  Subsidiary and in which  Collateral  Agent requests that such filing be
made. (iii) Additionally, Borrower and such Subsidiary shall execute and deliver
to Collateral Agent such other items as reasonably requested by Collateral Agent
in  connection  with  the  foregoing,  including  resolutions,   incumbency  and
officers'   certificates,   opinions  of  counsel,   search  reports  and  other
certificates and documents.

     (o) FINANCIAL  COVENANTS(i) . (i) LEVERAGE RATIO. On a consolidated  basis,
Borrower  and its  Subsidiaries  shall  not,  as of the last  day of any  fiscal
quarter, permit its ratio of Consolidated Funded Debt to Annualized EBITDA to be
greater than the ratios indicated below:



                     QUARTERLY PERIOD ENDING                                 REQUIRED RATIO
                                                                             
                     June 30, 2002                                              28.5 to 1
                     September 30, 2002                                          8.1 to 1
                     December 31, 2002                                           4.7 to 1
                     March 31, 2003                                              3.3 to 1
                     June 30, 2003                                               2.7 to 1
                     September 30, 2003                                          2.1 to 1
                     December 31, 2003                                           1.7 to 1
                     March 31, 2004                                              1.4 to 1
                     June 30, 2004                                               1.1 to 1
                     September 30, 2004                                           .9 to 1
                     December 31, 2004                                            .8 to 1
                     March 31, 2005                                               .7 to 1
                     June 30, 2005                                                .6 to 1
                     September 30, 2005                                           .4 to 1
                     Last day of each calendar quarter                            .4 to 1
                     thereafter

     (ii) MINIMUM TOTAL  REVENUES.  On a  consolidated  basis,  Borrower and its
Subsidiaries  shall not fail to maintain  total  revenues  of  Borrower  and its
Subsidiaries  for each  quarterly  period  set forth  below of not less than the
correlative amount indicated:



                     QUARTERLY PERIOD ENDING                                REQUIRED AMOUNT
                                                                              
                     June 30, 2000                                                 $2,000
                     September 30, 2000                                            $3,000
                     December 31, 2000                                             $6,000
                     March 31, 2001                                                $9,000
                     June 30, 2001                                                $14,000
                     September 30, 2001                                           $20,000
                     December 31, 2001                                            $31,000
                     March 31, 2002                                               $47,000
                     June 30, 2002                                                $70,000
                     September 30, 2002                                          $102,000
                     December 31, 2002                                           $146,000
                     March 31, 2003                                              $196,000
                     June 30, 2003                                               $248,000
                     September 30, 2003                                          $300,000
                     December 31, 2003                                           $349,000
                     March 31, 2004                                              $385,000
                     June 30, 2004                                               $428,000
                     September 30, 2004                                          $477,000
                     December 31, 2004                                           $533,000
                     March 31, 2005                                              $586,000
                     June 30, 2005                                               $645,000
                     September 30, 2005                                          $712,000
                     December 31, 2005                                           $785,000
                     March 31, 2006                                              $853,000
                     June 30, 2006                                               $927,000
                     September 30, 2006                                        $1,004,000
                     December 31, 2006                                         $1,086,000
                     March 31, 2007                                            $1,159,000
                     June 30, 2007                                             $1,226,000
                     September 30, 2007                                        $1,289,000
                     December 31, 2007                                         $1,349,000
                     March 31, 2008                                            $1,414,000
                     June 30, 2008                                             $1,478,000
                     September 30, 2008                                        $1,541,000

     (iii) INTEREST  COVERAGE RATIO. On a consolidated  basis,  Borrower and its
Subsidiaries shall not permit the ratio of Annualized EBITDA to Interest Expense
(Interest  Expense to be measured on a rolling  four  quarter  basis) to be less
than the ratio set forth below (determined as of the end of the quarterly period
set forth below):



                     QUARTERLY PERIOD ENDING                                    REQUIRED RATIO
                                                                             
                     September 30, 2002                                           .5 to 1
                     December 31, 2002                                           1.2 to 1
                     March 31, 2003                                              1.9 to 1
                     June 30, 2003                                               2.5 to 1
                     September 30, 2003                                          3.2 to 1
                     December 31, 2003                                           3.9 to 1
                     March 31, 2004                                              4.5 to 1
                     June 30, 2004                                               5.2 to 1
                     September 30, 2004                                          6.1 to 1
                     December 31, 2004                                           7.2 to 1
                     March 31, 2005                                              8.5 to 1
                     June 30, 2005                                              10.0 to 1
                     September 30, 2005                                         11.9 to 1
                     December 31, 2005                                          14.2 to 1
                     March 31, 2006                                             16.9 to 1
                     June 30, 2006                                              20.0 to 1
                     Last day of each calendar quarter                          20.0 to 1
                     thereafter

     (iv) DEBT SERVICE COVERAGE RATIO. On a consolidated basis, Borrower and its
Subsidiaries  shall not permit the ratio of  Annualized  EBITDA to Debt  Service
(Debt  Service to be measured on a rolling four  quarter  basis) to be less than
the ratio set forth below  (determined as of the end of the quarterly period set
forth below):



                     QUARTERLY PERIOD ENDING                   REQUIRED RATIO
                                                                              
                     September 30, 2002                                           .5 to 1
                     December 31, 2002                                           1.2 to 1
                     March 31, 2003                                              1.9 to 1
                     June 30, 2003                                               2.5 to 1
                     September 30, 2003                                          2.2 to 1
                     December 31, 2003                                           2.1 to 1
                     March 31, 2004                                              1.9 to 1
                     June 30, 2004                                               1.8 to 1
                     September 30, 2004                                          2.0 to 1
                     December 31, 2004                                           2.3 to 1
                     March 31, 2005                                              2.6 to 1
                     June 30, 2005                                               2.9 to 1
                     September 30, 2005                                          3.2 to 1
                     December 31, 2005                                           3.6 to 1
                     March 31, 2006                                              4.0 to 1
                     June 30, 2006                                               4.5 to 1
                     September 30, 2006                                          5.0 to 1
                     Last day of each calendar quarter                           5.0 to 1
                     thereafter


     (v)  MAXIMUM  FUNDED  DEBT  TO  CAPITALIZATION.  On a  consolidated  basis,
Borrower and its Subsidiaries shall not permit the ratio of Consolidated  Funded
Debt  to  Capitalization  to  exceed  the  percentage  amount  set  forth  below
(determined as of the end of the quarterly period set forth below):



                    QUARTERLY PERIOD ENDING                                     PERCENTAGE
                                                                                  
                    June 30, 2000                                                    65%
                    Last day of each calendar quarter                                65%
                    thereafter


     As used in  this  subsection  (o),  the  following  terms  shall  have  the
following  meanings:  "Annualized EBITDA" means EBITDA for the two most recently
completed  fiscal  quarters  multiplied by two;  "Capitalization"  means, on any
date, the sum of (i) Consolidated Funded Debt, and (ii) the sum of capital stock
plus paid in capital of Borrower  (including  the  Rights-of-Way  Capitalization
Value of any  rights-of-way  contributed to Borrower by Holdings as capital) and
its  Subsidiaries  on such date,  on a  consolidated  basis and as determined in
accordance  with  GAAP;  "Consolidated  Funded  Debt"  means,  as of any date of
determination,  all  Indebtedness of Borrower and its Subsidiaries on such date,
on a  consolidated  basis and as  determined  in  accordance  with  GAAP;  "Debt
Service"  means,  for any period with respect to Borrower and its  Subsidiaries,
(i) the amount of interest expense, both expensed and capitalized (including the
portion of any payments in respect of any capital  leases  allocable to interest
expense but excluding Qualifying Fiber or Conduit Purchases),  on a consolidated
basis and as  determined in accordance  with GAAP,  paid or payable  during such
period in respect of any  Indebtedness  of Borrower and its  Subsidiaries,  PLUS
(ii) all  scheduled  payments of principal on  Indebtedness  of Borrower and its
Subsidiaries  (including  the  principal  component  of any  capital  leases but
excluding any Qualifying Fiber or Conduit  Purchases),  on a consolidated  basis
and as determined  in accordance  with GAAP,  for the period  involved,  whether
expensed or capitalized; "EBITDA" means, for any period with respect to Borrower
and its Subsidiaries,  net income (excluding  extraordinary items), PLUS (except
to the extent  attributable to extraordinary  items) the amount of any interest,
Taxes,  depreciation,  and amortization deducted in determining such net income,
all of the foregoing as determined on a consolidated  basis for Borrower and its
Subsidiaries  in conformity  with GAAP; and "Interest  Expense"  means,  for any
period with  respect to Borrower  and its  Subsidiaries,  the amount of interest
expense, both expensed and capitalized (including the portion of any payments in
respect of any  capital  leases  allocable  to interest  expense  but  excluding
Qualifying  Fiber  or  Conduit  Purchases),  on  a  consolidated  basis  and  as
determined  in  accordance  with GAAP,  paid or payable  during  such  period in
respect of any Indebtedness of Borrower and its Subsidiaries.

     (p)  AMENDMENTS OF FINANCING  DOCUMENTS.  Borrower shall not, and shall not
permit  any  of  its   Subsidiaries  to,  agree  to  or  permit  any  amendment,
modification  or waiver of any  provision  of the  Financing  Documents  if such
amendment,  modification or waiver would materially  adversely affect the rights
of Lender hereunder.

     (q) SUBORDINATED DEBT.  Borrower shall not, and shall not permit any of its
Subsidiaries  to, agree to or permit any  material  amendment,  modification  or
waiver of any  provision of any document or  instrument  governing or evidencing
Subordinated Debt.

     (r)  MATERIAL  CONTRACTS.  Borrower  shall not, and shall not permit any of
their Subsidiaries to, agree to or permit any amendment,  modification or waiver
of any material provision of any Material Contract,  if the effect thereof could
reasonably be expected to result in a Material  Adverse  Change.  If Borrower or
any of their  Subsidiaries  enters  into a Material  Contract  after the Closing
Date,  if requested by Lender,  Borrower  shall deliver to Lender a complete and
current copy of such Material  Contract in a reasonably prompt fashion after the
creation thereof,  except that Borrower shall not have any obligation to deliver
such  Material  Contract  if such  delivery is  prohibited  by the terms of such
Material  Contract  and if such  prohibition  was required by a party other than
Borrower or any of its  Subsidiaries.  Borrower  shall not  terminate  the Cisco
Purchase  Agreement (as defined in the Schedule) during the Availability  Period
(as defined in the Schedule).

     (s) ACCOUNTING CHANGES.  Borrower shall not, and shall not suffer or permit
any of its Subsidiaries to, make any significant change in accounting  treatment
or reporting practices, except as required by GAAP, or change the fiscal year of
Borrower  or of any of its  Subsidiaries,  except to change the fiscal year of a
Subsidiary to conform its fiscal year to Borrower's.

     (t) BOOKS AND RECORDS; INSPECTIONS.  Holdings and Borrower shall, and shall
cause each of its  Subsidiaries  to, keep adequate records and books of account,
in which  complete  entries will be made in accordance  with GAAP.  Holdings and
Borrower  shall provide  Lender and its agents access to their  premises and the
premises of their  Subsidiaries at any time and from time to time, during normal
business hours and upon reasonable  notice under the  circumstances,  and at any
time on and  after the  occurrence  of a Default  or Event of  Default,  for the
purposes of (i) inspecting  and verifying the  Collateral,  (ii)  inspecting and
copying (at  Borrower's  expense) any and all records  pertaining  thereto,  and
(iii)  discussing  the  affairs,  finances  and  business  of  Holdings  and its
Subsidiaries with any officer,  employee or director of Holdings and Borrower or
with their  accountants.  Borrower  shall  reimburse  Lender for the  reasonable
travel and related  expenses of Lender's  employees or, at Lender's  option,  of
such outside  accountants or examiners as may be retained by Lender to verify or
inspect  Collateral,  records or documents of Holdings and Borrower on a regular
basis or for a special  inspection  if Lender  deems  the same  appropriate.  If
outside  examiners or accountants are used,  Borrower shall also pay Lender such
sum as Lender may be obligated to pay as fees  therefor;  PROVIDED that prior to
the  occurrence  of a Default  or an Event of  Default,  Borrower  shall only be
liable to Lender for one such inspection during any twelve month period.

     (u)  TRANSACTIONS  WITH  AFFILIATES.  (i) Borrower shall not, and shall not
permit  any of its  Subsidiaries  to,  enter  into any  transaction,  including,
without limitation,  the purchase, sale or exchange of property or the rendering
of any service, with any Affiliate of Borrower or other Loan Party except (A) in
the ordinary course of and pursuant to the reasonable requirements of Borrower's
or such Subsidiary's (as applicable) business and upon fair and reasonable terms
no less favorable to Borrower or such Subsidiary (as  applicable)  than would be
obtained in a comparable arms-length  transaction with a Person not an Affiliate
of Borrower or such  Subsidiary  (as  applicable),  (B) pursuant to the Approved
Services  Agreement and the Approved Tax  Allocation  Agreement or (C) as may be
approved  in writing by Lender;  PROVIDED,  that  transactions  between or among
Borrower and its  Affiliates  may be on terms more  favorable  to Borrower  than
would be obtained in a comparable  arms-length  transaction with a Person not an
Affiliate of Borrower and the Approved Tax Allocation Agreement and the Approved
Services  Agreement  are not  prohibited  by this Section  5.1(u);  (ii) None of
Borrower  and its  Subsidiaries  will make any loan,  advance  or payment to any
officer,  director,  shareholder  or  member  of any Loan  Party  (other  than a
shareholder or member consisting of a Loan Party),  except for loans or advances
permitted  under  Section  5.1(n)(iii),   or  reasonable  compensation  paid  to
officers, directors or employees in the ordinary course of business and payments
made for goods sold or  services  rendered  which  comply with clause (i) above;
(iii)  Neither  Borrower nor any of its  Subsidiaries  shall make any payment to
Holdings or PNI or any of their  Affiliates with respect to any federal or state
income tax liability of Borrower or any of its Subsidiaries,  PROVIDED, HOWEVER,
that  Borrower may make such  payments to Holdings  from time to time in amounts
which are based upon the federal and state  income tax  liabilities  of Borrower
and  its  Subsidiaries  in  order  for  Holdings  to pay  Taxes  as a part  of a
consolidated,  combined or unitary Tax filing group, PROVIDED, FURTHER, that (A)
the amounts of such  payments  shall not exceed the amounts of  liabilities  for
Taxes that would be payable by Borrower  and its  Subsidiaries  if they were not
part of a  consolidated,  combined or unitary Tax filing  group with  respect to
such Taxes,  (B) all such  payments  shall be required to be paid in  accordance
with the terms and provisions of the Approved Tax Allocation Agreement and shall
not be paid  substantially  prior to the  dates  upon  which  the  corresponding
amounts  would  be  required  to be  paid  by  Holdings  to the  applicable  tax
authorities,  and (C) at  least  10 days  prior  to the  making  of any  payment
referred  to in this  Section  5.1(u)(iii),  Borrower  shall have  given  Lender
written  notice of its intention to make such payment and the amount thereof and
shall have delivered to Lender  calculations and other appropriate  information,
in reasonable  detail,  evidencing and certifying that such payment is permitted
in accordance with this Section  5.1(u)(iii);  (iv) Neither  Borrower nor any of
its  Subsidiaries  shall make any  payment or  reimbursement  to  Holdings  with
respect  to  any  management,   administrative,   overhead,  legal,  accounting,
operating,  reporting, compliance or other costs or expenses, PROVIDED, HOWEVER,
that Borrower may pay to Holdings,  or reimburse  Holdings for Holdings' payment
of,  management  fees in  accordance  with  Section  5.1(v) and  administrative,
overhead, legal, accounting, operating, reporting, compliance and other costs or
expenses in an aggregate  amount not to exceed $500,000 during any calendar year
if (but only if) all such  payments  or  reimbursements  shall be required to be
paid by Borrower to Holdings in accordance  with the terms and provisions of the
Approved  Services  Agreement;  (v) Neither Borrower nor any of its Subsidiaries
shall make any payment (whether cash or other property,  but excluding  property
in the  form  of  capital  stock  of  Holdings)  to or for  the  benefit  of the
employees,  officers or  directors of Holdings,  Borrower or any  Subsidiary  of
Borrower  with respect to any stock option or other benefit plan relating to any
capital stock, PROVIDED,  HOWEVER, that Borrower may make such payments pursuant
to and in accordance  with stock option or other  benefit  plans for  employees,
officers or directors of Holdings,  Borrower or any Subsidiary of Borrower in an
aggregate amount not to exceed $500,000 during any calendar year.

     (v)  MANAGEMENT  FEES.  Borrower  shall  not,  and  shall  not  permit  any
Subsidiary of Borrower to, pay any management  fees to any Affiliate of Borrower
other than management fees (if any) as may be required to be paid by Borrower to
PNI pursuant to the Approved Services Agreement.

     (w) CERTAIN AGREEMENTS. Borrower shall not, and shall not permit any of its
Subsidiaries  to, agree to or permit any  material  amendment,  modification  or
waiver  of any  provision  of the  Approved  Services  Agreement,  the  Approved
Allocation  Agreement,  the Asset  Contribution  Agreement,  the  Indemnity  and
Contribution  Agreement  or  the  Subordination  Agreement  if  such  amendment,
modification or waiver taken as a whole as to each such amendment,  modification
or waiver would adversely  affect the rights of Lender  hereunder (as determined
by Lender in its sole discretion).

     (x)  FURTHER  ASSURANCES  AND  ADDITIONAL  ACTS.  Borrower  shall  execute,
acknowledge,  deliver,  file,  notarize and register at its own expense all such
further  agreements,  instruments,  certificates,  documents and  assurances and
perform such acts as Lender shall deem  necessary or  appropriate  to effectuate
the purposes of the Loan Documents, and promptly provide Lender with evidence of
the foregoing satisfactory in form and substance to Lender.

     SECTION 6. EVENTS OF DEFAULT.

     6.1 EVENTS OF DEFAULT.  Any of the following events which shall occur shall
constitute an "Event of Default":

     (a)  PAYMENTS.  (i)  Borrower  shall  fail to pay  when due any  amount  of
principal of any Loan or Note; or (ii)  Borrower  shall fail to pay when due any
amount of interest on any Loan or Note, or any fee or other amount payable under
any of the Loan Documents, or Holdings or any other Loan Party shall fail to pay
when due any amount payable under any of the Loan Documents,  and in the case of
this clause (ii) any such default shall remain unremedied for five days.

     (b) REPRESENTATIONS  AND WARRANTIES.  Any representation or warranty by any
Loan Party under or in connection  with the Loan  Documents  shall prove to have
been incorrect in any material respect when made or deemed made.

     (c) FAILURE BY BORROWER TO PERFORM CERTAIN  COVENANTS.  Borrower shall fail
to perform or observe any term,  covenant or agreement  contained in subsections
(b)(i) or (g) through (w) of Section 5.1.

     (d) FAILURE BY BORROWER TO PERFORM OTHER COVENANTS.  Borrower shall fail to
perform or observe any other term,  covenant or agreement  contained in any Loan
Document on its part to be  performed  or observed  and any such  failure  shall
remain  unremedied for a period of 30 days from the occurrence  thereof  (unless
Lender reasonably determines that such failure is not capable of remedy).

     (e)  INSOLVENCY.  (i)  Holdings,   Borrower  or  any  of  their  respective
Subsidiaries  shall be  dissolved,  liquidated,  wound up or cease its corporate
existence,  except to the extent  expressly  permitted  by Section  5.1; or (ii)
Holdings,  Borrower or any such  Subsidiary (A) shall make a general  assignment
for the  benefit  of  creditors,  or shall  generally  fail to pay,  or admit in
writing  its  inability  to pay,  its  debts  as they  become  due,  subject  to
applicable grace periods,  if any, whether at stated maturity or otherwise;  (B)
shall voluntarily  cease to conduct its business in the ordinary course,  except
to the  extent  expressly  permitted  by Section  5.1;  (C) shall  commence  any
Insolvency  Proceeding  with respect to itself;  or (D) shall take any action to
effectuate or authorize any of the foregoing.

     (f) INVOLUNTARY  PROCEEDINGS.  (i) Any involuntary Insolvency Proceeding is
commenced  or  filed  against  Holdings,  Borrower  or any or  their  respective
Subsidiaries, or any writ, judgment, warrant of attachment, execution or similar
process, is issued or levied against a substantial part of Holdings', Borrower's
or any such Subsidiary's  properties,  and any such proceeding or petition shall
not be dismissed,  or such writ, judgment,  warrant of attachment,  execution or
similar  process  shall not be released,  vacated or fully bonded within 60 days
after  commencement,  filing  or  levy;  (ii)  Holdings,  Borrower  or any  such
Subsidiary  admits the  material  allegations  of a  petition  against it in any
Insolvency  Proceeding,  or an order for relief (or similar order under non-U.S.
law) is ordered in any Insolvency Proceeding; or (iii) Holdings, Borrower or any
such Subsidiary acquiesces in the appointment of a receiver, trustee, custodian,
conservator,  liquidator,  mortgagee in possession (or agent therefor), or other
similar Person for itself or a substantial portion of its property or business.

     (g) DEFAULTS UNDER OTHER INDEBTEDNESS.  Holdings,  Borrower or any of their
respective  Subsidiaries  shall fail (i) to make any payment of any Indebtedness
evidenced by or arising under any Financing Document, or any amount of any other
Indebtedness  in an aggregate  principal  amount of at least  $1,000,000 (or its
equivalent  in  another  currency)  when due  (whether  by  scheduled  maturity,
required prepayment,  acceleration, demand or otherwise), and such failure shall
continue after the applicable grace or notice period,  if any,  specified in the
agreement or  instrument  relating to such  Indebtedness  as of the date of such
failure,  or (ii) to perform or observe any term,  covenant or  condition on its
part to be  performed or observed  under any  Financing  Document,  or any other
agreement,  note or instrument relating to any such Indebtedness,  when required
to be performed or observed,  or any other event shall occur or condition  shall
exist thereunder,  and such failure, event or condition shall continue after the
applicable grace or notice period, if any, specified in such agreement,  note or
instrument,  if the effect of such failure, event or condition is to accelerate,
or to permit the acceleration of, the maturity of such Indebtedness; or any such
Indebtedness shall be declared to be due and payable,  or required to be prepaid
(other than by a regularly scheduled required  prepayment),  prior to the stated
maturity  thereof;  or (without  limiting the  generality of the  foregoing) any
defined  "Event of Default" (as defined in any  Financing  Document)  shall have
occurred and be continuing.

     (h) CISCO DEFAULTS.  Any Loan  Party (i) shall fail to pay any Indebtedness
or other obligations owing under any other agreement with Cisco Systems,  Lender
or any of their respective Subsidiaries or under any note or instrument in favor
of Cisco  Systems,  Lender  or any of their  respective  Subsidiaries,  when due
(whether at scheduled maturity or by required prepayment,  acceleration,  demand
or otherwise),  or (ii) shall  otherwise be in breach of or material  default in
any of its obligations  under any such agreement,  note or instrument,  and such
failure,  breach or default shall continue after the applicable grace period, if
any, specified in such agreement, note or instrument. .

     (i) MATERIAL  ADVERSE CHANGE.  Any Material Adverse Change shall occur that
gives Lender  grounds to conclude that any Loan Party may not, or will be unable
to,  perform  or observe in the  normal  course its  obligations  under the Loan
Documents.

     (j) FAILURE BY GUARANTOR TO PERFORM COVENANTS;  INVALIDITY OF GUARANTY. Any
Guarantor  shall  fail to perform or observe  any term,  covenant  or  agreement
contained  in any  Guaranty  on its part to be  performed  or  observed,  or any
default  shall occur under any  Guaranty,  and any such failure or default shall
continue after the applicable grace period, if any, specified in any Guaranty as
of the date of such failure,  or any defined  "Event of Default" or "Default" as
defined in any Guaranty shall have occurred and is  continuing;  or any Guaranty
or any other Guarantor  Document shall for any reason be revoked or invalidated,
or otherwise cease to be in full force and effect, or any Guarantor or any other
Person  shall  contest in any manner the validity or  enforceability  thereof or
deny that it has any further liability or obligation thereunder.

     (k) DEFAULT  UNDER OTHER  DOCUMENTS.  Any  defined  "Event of Default"  (as
defined in any other Loan Document)  shall have occurred;  or Borrower or any of
its  Subsidiaries  shall  be in  breach  of or  default  in any of its  material
obligations  under any Material  Contract,  and such failure,  breach or default
shall  continue  after the applicable  grace period,  if any,  specified in such
Material  Contract  and could  reasonably  be  expected  to result in a Material
Adverse Change.

     (l)  CONSENTS,  ETC.  Any law,  decree,  license,  consent,  authorization,
registration or approval now or hereafter  necessary to enable any Loan Party to
comply  in all  material  respects  with its  obligations  incurred  in the Loan
Documents  or in  connection  with the  purchase of Financed  Products  shall be
modified in a  materially  adverse  manner,  or shall be revoked,  withdrawn  or
withheld or shall cease to remain in full force and effect.

     (m) JUDGMENTS. A final judgment or order for the payment of money in excess
of $1,000,000 (or its equivalent in another currency) which is not fully covered
by third-party insurance shall be rendered against Holdings,  Borrower or any of
their respective Subsidiaries and the same shall not be discharged,  bonded or a
stay of execution  thereof not be procured  within sixty (60) days from the date
of  the  entry  thereof  and  Holdings,  Borrower  or any  of  their  respective
Subsidiaries  (as the case may be) shall not,  within said sixty day period,  or
such longer  period  during which  execution of the same shall have been stayed,
appeal  therefrom  and cause the  execution  thereof  to be stayed  during  such
appeal;  or (ii) any  non-monetary  judgment or order shall be rendered  against
Holdings,  Borrower  or any  such  Subsidiary  which  has  resulted  in or would
reasonably be expected to result in a Material Adverse Change;  and in each case
there  shall be any period of 30  consecutive  days during  which such  judgment
continues  unsatisfied or during which a stay of enforcement of such judgment or
order, by reason of a pending appeal or otherwise, shall not be in effect.

     (n) CHANGE OF CONTROL.  Any Change of Control  shall occur and Lender shall
have notified Borrower that such Change of Control is an Event of Default within
30 days of  Lender  having  received  notice  from  Borrower  of such  Change of
Control;  PROVIDED that any Change of Control shall automatically  constitute an
Event of Default if  Borrower  fails to notify  Lender of such Change of Control
within ten days of the occurrence of such Change of Control.

     (o) COLLATERAL  DOCUMENTS.  Any of the Collateral  Documents after delivery
thereof shall for any reason be revoked or invalidated, or otherwise cease to be
in full force and effect, or any Loan Party or any other Person shall contest in
any manner the  validity  or  enforceability  thereof,  or any Loan Party or any
other  Person  shall  deny  that  it has any  further  liability  or  obligation
thereunder;  or any of the  Collateral  Documents for any reason,  except to the
extent  permitted  by the  terms  thereof,  shall  cease to  create a valid  and
perfected  Lien  subject  only  to  Permitted  Liens  in any  of the  Collateral
purported to be covered  thereby;  or any of the Financed  Products shall at any
time be located outside of the United States.

     6.2 EFFECT OF EVENT OF DEFAULT.  If any Event of Default shall occur and is
continuing,  Lender may by notice to Borrower,  (i) declare its Commitment to be
terminated,  whereupon the same shall forthwith terminate,  and (ii) declare the
entire  unpaid  principal  amount  of the Loans and the  Note(s),  all  interest
accrued and unpaid  thereon and all other  Obligations  to be forthwith  due and
payable,  whereupon the Loans and the Note(s), all such accrued interest and all
such other  Obligations  shall become and be forthwith due and payable,  without
presentment,  demand,  protest or further  notice of any kind,  all of which are
hereby  expressly  waived by Borrower,  provided  that if an event  described in
Section  6.1(e) or 6.1(f) shall occur,  the result which would  otherwise  occur
only upon giving of notice by Lender to Borrower as  specified  in this  Section
6.2  shall  occur  automatically,   without  the  giving  of  any  such  notice.
Additionally,  Lender may exercise  any or all of its rights and remedies  under
the Collateral  Documents,  and proceed to enforce all other rights and remedies
available to it under the Loan Documents and applicable law.

     SECTION 7. MISCELLANEOUS.

     7.1  AMENDMENTS.  No amendment to any provision of this Agreement  shall be
effective  unless it is in writing and has been  signed by Lender and  Borrower,
and no waiver of any provision of this Agreement, or consent to any departure by
Borrower  therefrom,  shall be  effective  unless it is in writing  and has been
signed by Lender. Any such amendment,  waiver or consent shall be effective only
in the specific instance and for the specific purpose for which given.

     7.2 NOTICES.  All notices and other  communications  provided for hereunder
and under the other Loan Documents shall,  unless otherwise stated herein, be in
writing (including by facsimile  transmission) and mailed,  sent or delivered to
the respective  parties hereto at or to their respective  addresses or facsimile
numbers set forth in the  Schedule,  or at or to such other address or facsimile
number as shall be  designated  by any  party in a  written  notice to the other
party  hereto.  All such notices and  communications  shall be effective  (i) if
delivered  by  hand,  when  delivered;  (ii) if sent by  courier  service,  when
delivered;  (iii) if sent by mail,  upon the  earlier  of the date of receipt or
five  Banking  Days after  deposit in the mail,  first class (or air mail,  with
respect  to  communications  to be sent to or from the United  States),  postage
prepaid;  and  (iv) if sent by  facsimile  transmission,  when  sent;  provided,
however,  that notices and  communications to Lender pursuant to Section 2 shall
not be effective until received.

     7.3 NO  WAIVER;  CUMULATIVE  REMEDIES.  No failure on the part of Lender to
exercise,  and no delay in  exercising,  any right,  remedy,  power or privilege
under any Loan Document shall operate as a waiver thereof,  nor shall any single
or partial exercise of any such right,  remedy,  power or privilege preclude any
other or further  exercise  thereof or the exercise of any other right,  remedy,
power or  privilege.  The  rights  and  remedies  under the Loan  Documents  are
cumulative and not exclusive of any rights, remedies, powers and privileges that
may otherwise be available to Lender.

     7.4 COSTS AND EXPENSES;  INDEMNIFICATION.  Borrower agrees to pay on demand
(i) the  reasonable  out-of-pocket  costs and  expenses of Lender and any of its
affiliates,  and the  reasonable  fees and  disbursements  of  counsel to Lender
(excluding  allocated  costs and  expenses  for  internal  legal  services),  in
connection with the negotiation, preparation, execution and delivery of the Loan
Documents;  and (ii) all costs and  expenses of Lender and its  affiliates,  and
fees and  disbursements of counsel  (excluding  allocated costs and expenses for
internal legal  services),  in connection with any amendments,  modifications or
waivers of the terms of any Loan  Documents,  any Default,  the  enforcement  or
attempted enforcement of, and preservation of any rights or interests under, the
Loan  Documents,   and  any  out-of-court   workout  or  other   refinancing  or
restructuring  or any bankruptcy or insolvency case or proceeding.  In addition,
whether  or not the  transactions  contemplated  hereby  shall  be  consummated,
Borrower  hereby agrees to indemnify  Lender,  any  affiliate  thereof and their
respective directors,  officers,  employees,  agents, counsel and other advisors
(each an "Indemnified Person") against, and hold each of them harmless from, any
and all liabilities,  obligations,  losses, claims, damages, penalties, actions,
judgments,  suits,  costs,  expenses  or  disbursements  of any  kind or  nature
whatsoever,  including the reasonable  fees and  disbursements  of counsel to an
Indemnified  Person  (excluding  allocated costs and expenses for internal legal
services),  which may be  imposed  on,  incurred  by, or  asserted  against  any
Indemnified  Person,  in any way  relating  to or arising out of any of the Loan
Documents,  the  use or  intended  use  of the  proceeds  of  the  Loans  or the
transactions  contemplated  hereby or  thereby,  including  with  respect to any
investigation,  litigation or other proceeding relating to any of the foregoing,
irrespective  of whether the  Indemnified  Person  shall be  designated  a party
thereto (the  "Indemnified  Liabilities");  provided that Borrower  shall not be
liable to any Indemnified Person for any portion of such Indemnified Liabilities
to the  extent  they are  found  by a final  decision  of a court  of  competent
jurisdiction to have resulted from such Indemnified Person's gross negligence or
willful misconduct.  If and to the extent that the foregoing  indemnification is
for  any  reason  held  unenforceable,  Borrower  agrees  to  make  the  maximum
contribution  to the  payment  and  satisfaction  of  each  of  the  Indemnified
Liabilities which is permissible under applicable law.

     7.5 SURVIVAL.  All covenants,  agreements,  representations  and warranties
made in any Loan  Documents  shall,  except  to the  extent  otherwise  provided
therein, survive the execution and delivery of this Agreement, the making of the
Loans and the  execution  and delivery of any Note,  and shall  continue in full
force  and  effect  so long as  Lender  has any  Commitment,  any  Loans  remain
outstanding or any other Obligations  remain unpaid or any obligation to perform
any other act  hereunder or under any other Loan Document  remains  unsatisfied.
Without  limiting the generality of the foregoing,  the  obligations of Borrower
under Section 7.4, and all similar  obligations  under the other Loan  Documents
(including  all  obligations  to  pay  costs  and  expenses  and  all  indemnity
obligations),  shall survive the repayment of the Loans and the  termination  of
the Commitment.

     7.6 BENEFITS OF AGREEMENT. The Loan Documents are entered into for the sole
protection  and benefit of the parties  hereto and their  successors and assigns
and the  Indemnified  Persons  referred to in Section  7.4,  and no other Person
(other  than Cisco  Systems)  shall be a direct or indirect  beneficiary  of, or
shall have any direct or indirect  cause of action or claim in connection  with,
any Loan Document.

     7.7 BINDING  EFFECT;  SUCCESSORS AND ASSIGNS.  This Agreement  shall become
effective when it shall have been executed by Borrower and Lender and thereafter
shall be binding  upon and shall inure to the benefit of Lender and Borrower and
their respective successors and permitted assigns,  except as otherwise provided
herein. Borrower may not assign,  transfer,  hypothecate or otherwise convey its
rights,  benefits,  obligations  or duties  hereunder  or under  any other  Loan
Document without the prior express written consent of Lender. Any such purported
assignment,  transfer, hypothecation or other conveyance by Borrower without the
prior express written consent of Lender shall be void. Borrower acknowledges and
agrees that Lender may assign, or grant  participations  in, all or a portion of
its  rights  and  obligations  hereunder  and under the  other  Loan  Documents,
including the benefit of Section 7.4;  PROVIDED,  that Lender may not assign any
of its  rights  or  obligations  hereunder  to an  assignee  with a  substantial
presence  as a  telecommunications  service  provider or with a line of business
that competes in any  significant or material way with the business of Borrower.
Upon any  assignment  of  Lender's  rights  hereunder  and under the other  Loan
Documents,  such  assignee  shall have,  to the extent of such  assignment,  all
rights of Lender  hereunder and  thereunder  and may in turn assign such rights.
Upon any assignment and delegation of Lender's  obligations  hereunder and under
the other  Loan  Documents,  such  assignee  shall  have,  to the extent of such
assignment,  all obligations of Lender  hereunder and thereunder and may in turn
assign such obligations. If any such assignee (i) has expressly assumed Lender's
obligations  hereunder and  thereunder  and (ii) is an Eligible  Entity,  Lender
shall be relieved of its  obligations  hereunder and thereunder to the extent of
such assignment and assumption.  Borrower agrees that, upon any such assignment,
such assignee may enforce  directly,  without  joinder of Lender,  the rights of
Lender set forth in this  Agreement  and in the other Loan  Documents.  Any such
assignee  shall be entitled to enforce  Lender's  rights and remedies under this
Agreement and under any other Loan Document to the same extent as if it were the
"Lender"  party  hereto  or  thereto.  In the event of any  partial  assignment,
Lender,  Borrower and such  assignee  shall enter into such  amendments  to this
Agreement  and the other Loan  Documents  as shall be  necessary  to effect such
assignment. Additionally, Borrower shall execute and deliver substitute Notes to
the  assignee,  or to  Lender  and  the  assignee  (in  the  case  of a  partial
assignment),  dated the effective date of such assignment,  and containing other
appropriate insertions as to the payee, principal amount and place for payments.

     7.8  CONFIDENTIALITY.  (a)  Lender  agrees to take  normal  and  reasonable
precautions  and  exercise  due  care to  maintain  the  confidentiality  of all
information  respecting  Borrower  and its  business  ("Customer  Information").
Borrower  agrees  that  Lender  may  disclose  from  time to time  all  Customer
Information  in its  possession  to  Lender's  legal  counsel,  agents and other
professional advisors, and to its Subsidiaries and affiliates,  to any potential
assignees or participants of the rights and/or  obligations of Lender hereunder,
to any  underwriters  or  placement  agents for any  securities  to be issued by
Lender or any of its  Subsidiaries  or affiliates (or any transferee of any such
Subsidiaries  or affiliates) and to any rating agency rating such securities and
to their  respective  legal  counsel,  agents and other  professional  advisors;
PROVIDED that such  recipients  agree not to disclose such Customer  Information
for any purposes other than as  contemplated  herein.  Borrower also consents to
the disclosure of Customer  Information by Lender, or any of its Subsidiaries or
affiliates, (i) at the request of any Governmental Authority having jurisdiction
over Lender or such Subsidiary or affiliate,  (ii) pursuant to subpoena or other
court process,  (iii) to the extent  reasonably  required in connection with any
litigation to which Lender or any of its  Subsidiaries or affiliates is a party,
(iv) to the extent  reasonably  required in connection  with the exercise of any
remedy hereunder or under any other Loan Document,  (iv) when otherwise required
to do so in  accordance  with  applicable  law,  and (v)(A) to the  extent  such
information is made available by Borrower or was or becomes generally  available
to the public  other  than as a result of  disclosure  by Lender,  or (B) was or
becomes available on a non-confidential basis from a source other than Borrower,
provided  that  such  source is not bound by a  confidentiality  agreement  with
Borrower known to Lender.

     (b) Borrower agrees to take normal and reasonable  precautions and exercise
due care to maintain the  confidentiality  of this  Agreement  and the terms and
provisions  hereof.  Lender  agrees that Borrower may disclose from time to time
the  existence  of this  Agreement  and  the  terms  and  provisions  hereof  to
Borrower's  legal  counsel,  agents and other  professional  advisors,  to their
Subsidiaries  and  affiliates,   as  reasonably   required  in  connection  with
negotiations  with a prospective  acquirer of Borrower or  substantially  all of
Borrower's  assets or a prospective  merger partner,  to any prospective  equity
investor in Borrower, to any co-development partner permitted hereunder,  to any
bank or other financial  institution  providing  financing to Borrower or any of
its Subsidiaries or affiliates,  to any underwriters or placement agents for any
securities to be issued by Borrower or any of its Subsidiaries or affiliates and
to any rating  agency  rating  such  securities  and to their  respective  legal
counsel,  agents and other  professional  advisors.  Lender also consents to the
disclosure of this Agreement and the terms and provisions hereof by Borrower, or
any of their Subsidiaries or affiliates,  (i) at the request of any Governmental
Authority  having  jurisdiction  over  Borrower  or any of its  Subsidiaries  or
affiliates,  (ii)  pursuant to subpoena  or other  court  process,  (iii) to the
extent  reasonably  required in connection with any litigation to which Borrower
or any of its  Subsidiaries  or affiliates is a party,  and (iv) when  otherwise
required to do so in accordance  with  applicable  law. THE FOREGOING  PERMITTED
DISCLOSURE  DOES NOT INCLUDE  DISCLOSURE  TO ANY OTHER VENDOR  PROVIDING  VENDOR
FINANCING  TO  BORROWER  OR ANY  OF  THEIR  SUBSIDIARIES  (WHETHER  DIRECTLY  OR
INDIRECTLY);  PROVIDED  THAT  BORROWER  MAY PROVIDE A COPY OF THIS  AGREEMENT TO
NORTEL NETWORKS,  INC.  ("NORTEL") IN CONNECTION WITH THE FINANCING DOCUMENTS OR
TO LUCENT TECHNOLOGIES, INC. (OR ITS AFFILIATES) ("LUCENT") IN CONNECTION WITH A
PROSPECTIVE  FINANCING CONSISTENT WITH THE TERMS HEREOF IF SUCH COPY PROVIDED TO
NORTEL IN  CONNECTION  WITH THE  FINANCING  DOCUMENTS OR TO LUCENT IN CONNECTION
WITH A PROSPECTIVE  FINANCING HAS BEEN REDACTED TO EXCLUDE ALL REFERENCES TO THE
FEES,  INTEREST RATE AND OTHER PRICING  INFORMATION  SET FORTH HEREIN.  BORROWER
SHALL PROVIDE  PRIOR NOTICE TO LENDER OF ANY PROPOSED  PUBLIC  ANNOUNCEMENTS  OR
OTHER  PUBLIC  DISCLOSURE  OR FILINGS OF OR RELATING TO THIS  AGREEMENT  AND THE
TERMS AND  PROVISIONS  HEREOF  AS  PERMITTED  BY THIS  SUBSECTION  (B)  ("PUBLIC
DISCLOSURE"),  AND NO  PUBLIC  DISCLOSURE  MAY BE MADE IN  RESPECT  OF THE FEES,
INTEREST RATE AND OTHER PRICING INFORMATION WITH RESPECT HERETO WITHOUT LENDER'S
PRIOR CONSENT (SUCH CONSENT NOT TO BE  UNREASONABLY  WITHHELD).  PRIOR TO MAKING
ANY REQUIRED  FILING WITH THE U.S.  SECURITIES  AND EXCHANGE  COMMISSION  OR ANY
OTHER FEDERAL,  STATE,  PROVINCIAL OR FOREIGN GOVERNMENTAL  AUTHORITY AS PART OF
ANY PUBLIC  DISCLOSURE,  BORROWER  SHALL REQUEST  CONFIDENTIAL  TREATMENT OF THE
FEES,  INTEREST RATE AND OTHER PRICING  INFORMATION  WITH RESPECT  HERETO TO THE
EXTENT PERMITTED BY APPLICABLE LAW.

     7.9 GOVERNING  LAW. THIS  AGREEMENT  SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

     7.10  SUBMISSION TO  JURISDICTION.  (a) Borrower  hereby (i) submits to the
non-exclusive  jurisdiction  of the  courts  of the  State  of New  York and the
Federal  courts  of the  United  States  sitting  in the  Borough  of  Manhattan
(collectively,  the  "New  York  Courts"),  for the  purpose  of any  action  or
proceeding  arising out of or relating to the Loan Documents,  (ii)  irrevocably
waives (to the extent permitted by applicable law) any objection which it now or
hereafter  may have to the  laying  of venue of any such  action  or  proceeding
brought in any of the New York Courts,  and any objection on the ground that any
such  action  or  proceeding  in any New  York  Court  has  been  brought  in an
inconvenient forum, and (iii) agrees that (to the extent permitted by applicable
law) a final  judgment  in any such action or  proceeding  brought in a New York
Court shall be conclusive and may be enforced in other  jurisdictions by suit on
the judgment or in any other manner permitted by law.

     (b) If a process agent (the "Process  Agent") is specified in the Schedule,
Borrower hereby  irrevocably  appoints the Process Agent as its authorized agent
with all powers  necessary  to  receive  on its behalf  service of copies of the
summons and complaint and any other process which may be served in any action or
proceeding  arising out of or relating to the Loan  Documents  in any of the New
York Courts.  Such  service may be made by mailing or  delivering a copy of such
process to Borrower in care of the Process  Agent at the Process  Agent's  above
address and Borrower hereby irrevocably authorizes and directs the Process Agent
to accept such  service on its behalf and agrees that the failure of the Process
Agent to give any  notice of any such  service to  Borrower  shall not impair or
affect the validity of such service or of any judgment rendered in any action or
proceeding  based thereon.  As an alternative  method of service,  Borrower also
irrevocably consents to the service of any and all process in any such action or
proceeding  by the mailing of copies of such  process to Borrower at its address
specified in the Schedule.  If for any reason the Process Agent specified in the
Schedule shall cease to act as such,  Borrower shall appoint  forthwith,  in the
manner  provided for herein,  a successor  Process Agent  qualified to act as an
agent for service of process with respect to all New York Courts and  acceptable
to Lender.

     (c) NO  LIMITATION.  Nothing in this Section 7.10 shall affect the right of
Lender to serve legal process in any other manner  permitted by law or limit the
right of Lender  to bring  any  action or  proceeding  against  Borrower  or its
property in the courts of other jurisdictions.

     7.11 WAIVER OF JURY TRIAL.  EACH OF LENDER AND BORROWER  HEREBY  KNOWINGLY,
VOLUNTARILY AND  INTENTIONALLY  WAIVES ANY RIGHTS IT MAY HAVE TO A TRIAL BY JURY
IN RESPECT OF ANY LITIGATION IN CONNECTION WITH ANY LOAN DOCUMENT.

     7.12 ENTIRE  AGREEMENT.  The Loan  Documents  reflect the entire  agreement
among  Borrower  and Lender with  respect to the  matters set forth  therein and
supersede any prior agreements, commitments, drafts, communication,  discussions
and understandings, oral or written, with respect thereto.

     7.13 SEVERABILITY.  Whenever possible, each provision of the Loan Documents
shall be  interpreted  in such  manner as to be  effective  and valid  under all
applicable laws and regulations.  If, however,  any provision of any of the Loan
Documents  shall be prohibited by or invalid under any such law or regulation in
any  jurisdiction,  it shall,  as to such  jurisdiction,  be deemed  modified to
conform to the minimum  requirements  of such law or regulation,  or, if for any
reason it is not deemed so modified, it shall be ineffective and invalid only to
the extent of such  prohibition  or invalidity  without  affecting the remaining
provisions  of such Loan  Document,  or the  validity or  effectiveness  of such
provision in any other jurisdiction.

     7.14  COUNTERPARTS.  This  Agreement  may  be  executed  in any  number  of
counterparts and by different parties hereto in separate  counterparts,  each of
which when so executed  shall be deemed to be an original and all of which taken
together shall constitute but one and the same agreement.

     7.15  JOINT  AND  SEVERAL  LIABILITY.   If  any  Additional  Borrowers  are
designated  in the  Schedule,  the  liability  of Borrower  and such  Additional
Borrowers  shall be joint and  several,  and,  except as the  context  otherwise
requires,  each reference  herein to "Borrower" shall mean and be a reference to
each Borrower and such  Additional  Borrowers.  Borrower and any such Additional
Borrowers  agree  that any and all of the  Obligations  shall be the  joint  and
several  responsibility of each of them notwithstanding any absence herein or in
any other Loan  Document of a reference  such as "jointly  and  severally"  with
respect to such Obligation. The compromise of any claim with, or the release of,
Borrower shall not constitute a compromise with, or a release of, any Additional
Borrower,  and  the  compromise  of any  claim  with,  or the  release  of,  any
Additional  Borrower  shall not  constitute a compromise  with, or a release of,
Borrower or any other Additional Borrower.

     7.16  NON-DISTURBANCE  AND ATTORNMENT.  *

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]






     Please  indicate  Borrower's  and any Additional  Borrower's  agreement and
acceptance  below  and  return  a copy of this  Agreement  to  Lender.  Upon the
signature of Borrower and any Additional  Borrower  below,  this Agreement shall
become a binding agreement of Lender and Borrower (and any Additional  Borrower)
as of the date first written above.



                                Very truly yours,

                                Cisco Systems Capital Corporation


                                By:/s/ Brian P. Fukuhara
                                   -------------------------
                                   Title: Chief Credit Officer



ACKNOWLEDGED AND AGREED:
- -----------------------

Pathnet Operating, Inc.

By: /s/  James M. Craig
    -------------------------------------
    Title:  Vice President and Treasurer







[GRAPHIC OMITTED][GRAPHIC OMITTED]



As of September 7, 2000

                             SCHEDULE OF INFORMATION

     This Schedule of Information  (this  "Schedule") is an integral part of the
Agreement  dated as of  September  7, 2000 (as  amended,  modified,  renewed  or
extended   from  time  to  time,   the   "Credit   Agreement")   among   Pathnet
Telecommunications,  Inc.,  Pathnet  Operating,  Inc. and Cisco Systems  Capital
Corporation.  Capitalized  terms used herein shall have the respective  meanings
assigned to them in the Credit Agreement.

     1. INFORMATION RELATING TO THE LOANS, HOLDINGS AND BORROWER:

     (A)  AVAILABILITY   PERIOD:  From  the  Closing  Date  through  the  second
anniversary  of the  Closing  Date  (the  last day of such  availability  period
hereinafter referred to as the "Commitment Expiry Date").

     (B) NOTICE OF BORROWING,  MINIMUM AMOUNTS AND OTHER  LIMITATIONS:  Borrower
shall  provide  five Banking  Days'  advance  notice of any proposed  borrowing.
Except to the extent otherwise  permitted by Lender in its sole  discretion,  no
more than two Loan drawdowns under any Tranche will be permitted in any month.

     (C) COMMITMENT: $50,000,000.

     (D) FEES:

     (i) CLOSING FEE: * of the  Commitment  as of the Closing  Date,  payable on
such date.

     (ii) COMMITMENT FEE: * per annum on the average daily unused portion of the
Commitment,  computed on a quarterly basis in arrears on the last Banking Day of
each quarter  based on the daily  utilization  for that quarter as calculated by
Lender. Such Commitment Fee shall accrue from the Closing Date to the Commitment
Expiry  Date and  shall be due and  payable  quarterly  in  arrears  on the last
Banking Day of each calendar  quarter,  with the final payment to be made on the
Commitment  Expiry Date;  PROVIDED  that,  in  connection  with any reduction or
termination  of the  Commitment,  the accrued  Commitment Fee calculated for the
period ending on such  reduction or  termination  date shall also be paid on the
date thereof.  The  Commitment Fee provided for herein shall accrue at all times
after the abovementioned  commencement date,  including at any time during which
one or more conditions precedent in Section 3.2 are not satisfied.

     (iii)  FACILITY  FEE:  * per  quarter  in which any  amount  of  principal,
interest or fees is payable.  Such  Facility  Fee shall  accrue from the Closing
Date until the date upon which all  Obligations  due under the Credit  Agreement
shall have been paid in full and shall be due and payable  quarterly  in arrears
on the last Banking Day of each  calendar  quarter,  with a final  payment to be
made on the date upon which  such final  payment  of  Obligations  is made.  Any
payment of Facility Fee for a partial  quarter shall be calculated on a prorated
basis.

     (iv) PREPAYMENT FEE: None.

     (E) CLOSING DEADLINE: September 11, 2000.

     (F) ADDITIONAL CLOSING DOCUMENTS AND INFORMATION:  Completion of additional
due diligence  satisfactory to Lender including satisfactory analysis validating
underlying  industry and market  assumptions with regard to Borrower's  business
plan and pro forma financials.

     (G) OTHER CONDITIONS:

     (i)  CONDITIONS  PRECEDENT  TO CLOSING  DATE:  The  following  condition(s)
precedent  shall be satisfied on or prior to the Closing Date:  (A) Creditor and
Lender shall have entered into an intercreditor  agreement in form and substance
satisfactory to Lender;  (B) Financing  Documents shall be in form and substance
satisfactory to Lender;  (C) Borrower shall have executed an equipment  purchase
agreement  with Cisco  Systems  (the "Cisco  Purchase  Agreement"),  in form and
substance  satisfactory to Lender, and (D) Borrower shall have provided evidence
reasonably  satisfactory  to Lender that Borrower has received  total  aggregate
capital contributions in cash from Holdings of not less than $35,000,000.

     (ii)  CONDITIONS  PRECEDENT  TO  EACH  BORROWING  DATE:  Additionally,  the
following  condition(s)  precedent  shall  be  satisfied  on or  prior  to  each
Borrowing  Date:  After giving effect to any  borrowing of Tranche B Loans,  the
aggregate  principal amount of outstanding Tranche B Loans shall not exceed * of
the aggregate principal amount of Tranche A Loans then outstanding.

     (H) MULTIPLE BORROWER PROVISIONS: No Additional Borrowers.

     (I) SUBSIDIARIES:  Pathnet Fiber Equipment LLC, a limited liability company
organized and existing  under the laws of the State of Delaware and Pathnet Real
Estate LLC, a limited liability company organized and existing under the laws of
the State of Delaware.

     2. ADDITIONAL TERMS AND CONDITIONS:

     (A) USE OF PROCEEDS:  Up to  $40,000,000  for the  financing of  Borrower's
purchase  of Cisco  Systems  networking  and  telecommunications  equipment  and
services  from the Vendor  thereof  ("Tranche  A");  PROVIDED that proceeds from
Loans  made  under  Tranche  A may be used for the  financing  of Cisco  Systems
networking and  telecommunications  equipment and services purchased by Borrower
on or after April 24, 2000; and up to $10,000,000 for the financing of any costs
incurred by the Borrower  for  hardware or other goods and  services  associated
with  the  integration  and   installation  of  Cisco  Systems   networking  and
telecommunications  equipment,  but excluding any such costs for hardware, goods
or services payable to direct competitors of Cisco Systems ("Tranche B").

     (B)  NOTE(S):  Promissory  Note in  substantially  the  form of  EXHIBIT  C
evidencing  the Loans under  Tranche A (the "Tranche A Loans");  and  Promissory
Note in the form of  EXHIBIT  D,  evidencing  the  Loans  under  Tranche  B (the
"Tranche B Loans").

     (C)  MANDATORY  PREPAYMENT:(i)  (i)  Promptly  after the end of each fiscal
year,  Borrower shall calculate  Excess Cash Flow for the fiscal year then ended
and shall,  not later than 90 days after the end of such fiscal year,  prepay to
the  holders  of  Eligible  Secured  Debt on a PRO RATA  basis  the  outstanding
principal  amount of the Loans in an amount equal to 50% of the Excess Cash Flow
for such fiscal year; provided,  however,  that any such prepayment shall not be
required if the amount of Excess Cash Flow for such year is less than $500,000.

     (ii) The  Loans  shall  be  subject  to  mandatory  prepayment  on any date
Borrower makes any voluntary prepayments on any term loans or other Indebtedness
for  borrowed  money  (other than  revolving  working  capital  loans,  unless a
permanent  commitment   reduction  occurs   simultaneously  with  the  principal
payment),  on a PRO RATA basis with the principal  payment made to the holder(s)
of such Indebtedness.

     Notwithstanding the foregoing, Borrower shall not be required to prepay any
such  Indebtedness in connection  with any of the following:  (a) prepayments of
Eligible  Secured  Debt  permitted  by and in  accordance  with  the  terms  and
provisions  of the  Collateral  Agency and  Intercreditor  Agreement,  provided,
however,  that,  if and to the  extent  required  by the  Collateral  Agency and
Intercreditor  Agreement,  such  prepayments  shall be shared with the Lender in
accordance  with  the  terms  and  provisions  of  the  Collateral   Agency  and
Intercreditor   Agreement;  (b)  prepayments  made  with  the  proceeds  of  new
Indebtedness  incurred for the purpose of  refinancing  the  Indebtedness  being
prepaid,  provided  that (i) no portion of such new  Indebtedness  matures or is
required  to be  prepaid,  purchased  or  otherwise  retired  earlier  than  the
corresponding  portion of the Indebtedness  being prepaid (including as a result
of any prepayment or redemption  upon the occurrence of a condition),  (ii) such
new  Indebtedness  (A) is  subordinated  to the Obligations to at least the same
extent as the Indebtedness being refinanced if such Indebtedness is Subordinated
Debt or (B) is permitted in accordance with this Agreement, and (iii) no Default
or Event of  Default  then  exists  or would  result  from  such  prepayment  or
refinancing;  (c)  prepayments  of purchase money  Indebtedness  permitted to be
incurred in accordance  with the Credit  Agreement;  or (d) prepayments of trade
payables incurred in the ordinary course of business.

     (iii) Borrower shall, within two Banking Days after it receives (A) any net
proceeds from the sale,  transfer or other  disposition  of Borrower's or any of
its Subsidiary's assets,  other than (i) sales,  transfers or other dispositions
constituting Fiber or Conduit Sales expressly permitted to be consummated by the
Credit  Agreement,  (ii) sales of inventory in the ordinary  course of business,
and (iii) the grant of a Lien as security expressly permitted under the terms of
the Credit  Agreement,  or (B) proceeds from insurance  relating to any Casualty
Event  aggregating  in excess of $500,000,  during any period of 12  consecutive
months  or less  (the  aggregate  amount of all such net  proceeds  or  proceeds
exceeding $500,000 received during any such period are herein called the "Excess
Proceeds Amount"), pay to Lender, as a prepayment of the Loans (which prepayment
shall be without  premium or penalty),  an aggregate  amount equal to the Excess
Proceeds Amount; provided, however, that (1) no such prepayment will be required
if and to the extent that the Excess Proceeds  Amount is under binding  contract
to be re-invested in productive assets used in the ordinary course of Borrower's
or its Subsidiary's  (as applicable)  business within 180 days of the receipt of
such Excess Proceeds  Amount and is, in fact, so re-invested  within 360 days of
the receipt of such Excess Proceeds Amount, (2) the Excess Proceeds Amount shall
be  deposited  into a cash  collateral  account  held by Lender  pursuant  to an
agreement in form and substance  satisfactory  to Lender until such time as such
amount (exclusive of any interest accrued thereon) is either  re-invested within
such 360 day period or applied to the Loans or other  Obligations as provided in
this  subsection  2(c)(iii),  and  (3) if,  at the  time  of any  such  required
prepayment,  any Eligible Secured Debt is outstanding,  then the Excess Proceeds
Amount may be paid to the  Collateral  Agent (as  opposed to the  Administrative
Agent)  and  distributed  pro rata to Lender  and the  holders  of the  Eligible
Secured Debt (or their  representatives)  for  application to the Loans or other
Obligations and to such Eligible  Secured Debt in accordance with the Collateral
Agency and Intercreditor Agreement.

     Except to the extent that any such  prepayment is required to be applied to
a particular tranche, any such amounts received as a mandatory prepayment of the
Loans shall be applied  first to the Tranche B Loans and second to the Tranche A
Loans.

     As used herein, "Casualty Event" means, with respect to any property of any
Person,  any loss of or damage to, or any  condemnation or other taking of, such
property  for which such Person or any of its  Subsidiaries  receives  insurance
proceeds,  or proceeds of a condemnation  award or other  compensation;  "Excess
Cash Flow" means,  with respect to the  Borrower and its  Subsidiaries,  for any
fiscal year,  and without  duplication,  the positive  remainder (if any) of (a)
EBITDA for such fiscal  year MINUS (b) the sum of (i) Taxes  payable in cash for
such  fiscal  year,  PLUS  (ii) all  principal  and cash  interest  payments  on
Indebtedness (including the principal component of any capital lease obligations
but excluding  Qualifying  Fiber or Conduit  Purchases)  made during such fiscal
year,  whether  optional,  mandatory or scheduled  payments,  PLUS (iii) Capital
Expenditures  (but only to the extent paid in cash and not financed) made during
such fiscal year; and "Capital Expenditures" means, with respect to Borrower and
its  Subsidiaries,  amounts  paid or  Indebtedness  incurred by such  Persons in
connection  with the purchase or lease by such Persons of property that would be
required to be  capitalized  and shown on the balance  sheet of such  Persons in
accordance with GAAP.

     (D)  COLLATERAL  DOCUMENTS:.  The Security  Agreements,  The  Subordination
Agreement,  the Indemnity and Contribution  Agreement and the Collateral  Agency
and  Intercreditor  Agreement,  as any such agreement may be amended,  modified,
supplemented,  renewed,  extended or  restated  from time to time with the prior
written  consent of Lender,  and any and all other  agreements,  deeds of trust,
mortgages,   chattel  mortgages,   security  agreements,   pledges,  guaranties,
assignments of proceeds,  assignments of income, assignments of contract rights,
assignments  of  partnership   interests,   assignments  of  royalty  interests,
assignments  of  performance  or  other  collateral  assignments,  subordination
agreements,  undertakings  and  other  agreements,  documents,  instruments  and
financing statements now or hereafter executed and/or delivered by any Person as
security or assurance for the payment or performance  of the  Obligations or any
part thereof.

     (E)  GUARANTY:  Guaranty  dated as of  August  9,  2000  made by PRE,  as a
guarantor,  in favor of Collateral  Agent;  Guaranty  dated as of August 9, 2000
made by PFE, as a guarantor, in favor of Collateral Agent.

          (F) ADDITIONAL LOAN DOCUMENTS: None.

          (G) FINANCING DOCUMENTS:  Credit Agreement dated as of August 9, 2000,
     between Borrower and Nortel Networks,  Inc. as the administrative Agent and
     Lenders named therein.  The parties to the Financing Documents are referred
     to herein collectively as the "Creditor".

          (H) GOVERNMENTAL LICENSES AND PERMITS: None.

          (I) REQUIRED CONSENTS: None.

          (J) ADDITIONAL PERMITTED LIENS: None.

          (K) ADDITIONAL REPORTING REQUIREMENTS: None.

          (L) MATERIAL CONTRACTS: See Schedule 2(l).

          3. ADDRESSES FOR NOTICES:

          (A) BORROWER:

          Pathnet  Operating,  Inc. 11720 Sunrise Valley Drive Reston,  Virginia
     20191 Attn: Mr. James Craig Fax No.: (703) 860-5682

                  (B)    LENDER:

                         Cisco Systems Capital Corporation
                         Mailstop SJ-Linc 1/2
                         170 West Tasman Drive
                         San Jose, California 95134-1706
                         Attn: Loan Administration, Worldwide Financial Services
                         Fax No.: (408) 527-3993

4.       LENDER'S ACCOUNT FOR PAYMENTS:

                  Account no.: 1233124070
                  Ref. "Pathnet Operating, Inc."
                  ABA no.: 121000358

                  Account maintained with:

                  Bank of America, N.A.
                  Concord, California

5.       PROCESS AGENT:

                  CT Corporation System
                  111 Eighth Avenue
                  New York, NY 10011




                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]






ACKNOWLEDGED AND AGREED:
- -----------------------

Cisco Systems Capital Corporation


By: /s/    Brian P. Fukuhara
    -------------------------------------------------
    Title: Chief Credit Officer


Pathnet Operating, Inc.


By: /s/   James M. Craig
    -------------------------------------------------
    Title: Vice President and Treasurer













                                    EXHIBIT A

                               NOTICE OF BORROWING







                                    EXHIBIT B

                             COMPLIANCE CERTIFICATE








                                    EXHIBIT C

                        FORM OF TRANCHE A PROMISSORY NOTE

         THIS NOTE HAS NOT BEEN REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
         AMENDED, OR ANY OTHER APPLICABLE SECURITIES LAWS. IT MAY NOT BE SOLD OR
         OTHERWISE  TRANSFERRED  UNDER  CIRCUMSTANCES  THAT  WOULD  RESULT  IN A
         VIOLATION OF THE  REGISTRATION  REQUIREMENTS  OF THE  SECURITIES ACT OF
         1933 OR SUCH OTHER LAWS.

U.S.$40,000,000

                  FOR VALUE RECEIVED, the undersigned,  Pathnet Operating,  Inc.
("Borrower"),  a limited liability company organized and existing under the laws
of the State of Delaware, HEREBY UNCONDITIONALLY PROMISES TO PAY to the order of
Cisco  Systems  Capital  Corporation  ("Lender"),  a  corporation  organized and
existing  under  the laws of the State of  Nevada,  the  principal  sum of FORTY
MILLION  United  States  Dollars  (U.S.$40,000,000),  or such  greater or lesser
amount as represents the aggregate  principal amount of the Tranche A loans (the
"Loans") made by Lender to Borrower pursuant to the Credit Agreement referred to
below,  quarterly in arrears,  payable on the dates and in the amounts indicated
in the  amortization  schedules set forth in the Annex attached hereto (the last
such date being hereinafter referred to as the "Maturity Date").

                  Borrower  further  promises to pay  interest on the  principal
amount of each Loan  outstanding  hereunder  on each  Interest  Payment Date (as
defined  below) until the Maturity  Date, at a rate per annum equal at all times
during each Interest Period for such Loan to LIBOR for such Interest Period plus
* per annum.

                  The period  between the date of a Loan and the  Maturity  Date
shall be divided into  successive  periods,  each such period being an "Interest
Period" for purposes of this Promissory  Note. The initial Interest Period for a
Loan  shall  begin on the date such  Loan is made and end on the next  Quarterly
Date.  Each  subsequent  Interest  Period  shall  begin  on the  last day of the
immediately  preceding  Interest  Period  and shall  end on the next  succeeding
Quarterly Date (with the last Interest  Period to end on the Maturity  Date). As
used  herein,  "LIBOR"  means for any  Interest  Period the rate of interest per
annum determined by Lender to be the rate of interest per annum (rounded upward,
if  necessary,  to the  nearest  1/100 of 1%) for  deposits in Dollars for three
months  appearing  on the  display  page  designated  as "3750" in the Dow Jones
Market Service (formerly known as the Telerate Service), or any replacement page
thereof in the Dow Jones Market  Service  displaying  London  interbank  offered
rates of major banks for Dollar  deposits,  at or about 11:00 a.m. (London time)
on the second  Banking Day  preceding the first day of the  applicable  calendar
quarter in which such Interest Period occurs,  provided that if no, or only one,
such offered  quotation  appears on such display page (or such other replacement
page),  "LIBOR" shall be determined by reference to the Reuters Screen LIBO Page
of the Reuters Monitor Money Rates Service (or any  replacement  page thereof or
other applicable  Reuters display page) or other  comparable  source of interest
quotations for such interbank  rates  selected by Lender;  and "Quarterly  Date"
means the last day of each calendar quarter.

                  Interest on each Loan shall be payable in arrears to Lender on
the last day of each calendar  quarter and on the Maturity Date (each such date,
an "Interest Payment Date");  provided that if any prepayment hereof is effected
other than on an Interest Payment Date,  accrued interest hereon shall be due on
such prepayment date as to the principal amount prepaid.

                  In the event that any amount of  principal  hereof or interest
thereon,  or any other amount payable  hereunder or under the Credit  Agreement,
shall not be paid in full when due (whether at stated maturity,  by acceleration
or  otherwise),  Borrower  shall pay interest  (after as well as before entry of
judgment  thereon  to the  extent  permitted  by law) on such  unpaid  amount to
Lender, from the date such amount becomes due until the date such amount is paid
in full,  payable on demand of Lender,  at a fluctuating rate per annum equal at
all times to the Prime Rate (as defined below)  plus * per annum  (the  "Default
Rate").  Additionally,   and  without  limiting  the  foregoing,  following  the
occurrence and during the continuance of any Event of Default,  at the option of
Lender,  the  interest  rate on all  Loans  outstanding  hereunder  shall be the
Default Rate.

                  As used  herein,  "Prime  Rate"  means for any day the rate of
interest in effect for such day as publicly  announced from time to time by Bank
of America,  N.A.,  as its prime rate.  Each change in the interest  rate hereon
based on a change  in the  prime  rate  shall be  effective  at the  opening  of
business on the day specified in the public announcement of such change.

                  All  computations  of interest  hereunder shall be made on the
basis of a year of 360 days  for the  actual  number  of days  occurring  in the
period for which any such interest or fee is payable.

                  Whenever any payment  hereunder  shall be stated to be due, or
whenever any Interest  Payment Date or any other date specified  hereunder would
otherwise  occur, on a day other than a Banking Day, then,  except to the extent
otherwise  provided  hereunder,  such payment  shall be made,  and such Interest
Payment Date or other date shall occur, on the next succeeding  Banking Day, and
such  extension  of time shall in such case be  included in the  computation  of
payment of interest hereunder;  PROVIDED,  HOWEVER, that if such extension would
cause such payment to be made,  or such  Interest  Payment Date or other date to
occur, in the next following calendar month, such payment shall be made and such
Interest  Payment Date or other date shall occur on the next  preceding  Banking
Day. As used herein,  "Banking  Day" means a day other than a Saturday or Sunday
on which  commercial banks are not required or authorized by law to close in San
Jose,  California,  except  that if the  applicable  Banking  Day relates to any
determination  of LIBOR,  "Banking  Day" means such a day on which  dealings are
carried out in the applicable offshore U.S. Dollar interbank market.

                  Each  such  payment  shall be made on the date  when  due,  in
immediately  available  funds,  to Lender's  account at Bank of  America,  N.A.,
Concord,  California,  ABA no.  12100358,  to account  number  1233124070,  ref.
"Pathnet Operating, Inc.," or to such other account of Lender as it from time to
time shall designate in a written notice to Borrower.

                  All payments of principal,  interest and other amounts made on
or in respect to this Promissory Note shall be made in United States Dollars for
value received on the date of payment,  without setoff,  counterclaim or, to the
extent permitted by applicable law,  defense,  and free and clear of and without
deduction for any present and future Taxes or charges whatsoever.

                  Lender  shall  record the date and amount of each Loan made to
Borrower, the amount of principal and interest due and payable from time to time
hereunder,  each payment thereof,  and the resulting  unpaid  principal  balance
hereof, in Lender's  internal records,  and any such records shall be conclusive
evidence absent manifest error of the amount of the Loans made by Lender and the
interest and payments thereon;  PROVIDED,  however,  that Lender's failure so to
record shall not limit or otherwise affect the obligations of Borrower hereunder
and under the Credit  Agreement  to repay the  principal  of and interest on the
Loans.

                  This  Promissory Note is a Note referred to in, and is subject
to and entitled to the benefits of, the Agreement  dated as of September 7, 2000
(as  amended,  modified,  renewed or  extended  from time to time,  the  "Credit
Agreement") among Pathnet  Telecommunications,  Inc. ("Holdings"),  Borrower and
Lender.  Capitalized  terms  used  herein  shall  have the  respective  meanings
assigned to them in the Credit Agreement.

                  The  Credit  Agreement  provides,   among  other  things,  for
acceleration  (which in certain cases shall be automatic) of the maturity hereof
upon the occurrence of certain stated events, in each case without  presentment,
demand, protest or further notice of any kind, all of which are hereby expressly
waived.

                  This  Promissory  Note is subject to prepayment in whole or in
part as provided in the Credit Agreement.

                  Borrower  hereby  waives  diligence,  presentment,  protest or
notice  of  total  or  partial  nonpayment  or  dishonor  with  respect  to this
Promissory Note.

                  Failure by the  holder  hereof to  exercise  any of its rights
hereunder in any instance  shall not  constitute a waiver thereof in that or any
other instance.

                  Borrower  agrees to pay on demand  all costs and  expenses  of
Lender and its  affiliates,  and fees and  disbursements  of counsel  (excluding
allocated  costs and expenses for internal legal  services),  in connection with
the enforcement or attempted  enforcement of, and  preservation of any rights or
interests under, (i) this Promissory Note, and (ii) any out-of-court  workout or
other  refinancing  or  restructuring  or any  bankruptcy or insolvency  case or
proceeding,  including any losses,  costs and expenses  sustained by Lender as a
result of any  failure  by  Borrower  to  perform  or  observe  its  obligations
contained herein.

                  THIS  PROMISSORY  NOTE SHALL BE GOVERNED BY, AND  CONSTRUED IN
ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                  Borrower hereby (a) submits to the non-exclusive  jurisdiction
of the  courts of the  State of New York and the  Federal  courts of the  United
States  sitting  in the  Borough  of  Manhattan  (collectively,  the  "New  York
Courts"), for the purpose of any action or proceeding arising out of or relating
to this  Promissory  Note, (b)  irrevocably  waives (to the extent  permitted by
applicable  law) any objection  which it now or hereafter may have to the laying
of venue of any such action or proceeding brought in any of the New York Courts,
and any  objection on the ground that any such action or  proceeding  in any New
York Court has been brought in an  inconvenient  forum,  and (c) agrees that (to
the extent  permitted by applicable  law) a final judgment in any such action or
proceeding  brought in a New York Court shall be conclusive  and may be enforced
in other  jurisdictions by suit on the judgment or in any other manner permitted
by law.

                  IN WITNESS  WHEREOF,  Borrower  by its duly  authorized  legal
representatives  has executed this  Promissory  Note on the date and in the year
first above mentioned.


                                BORROWER

                                Pathnet Operating, Inc.



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











                       ANNEX TO TRANCHE A PROMISSORY NOTE


         AMORTIZATION


         Payments  shall  commence  on the last day of the  quarter in which the
Commitment Expiry Date occurs and shall amortize quarterly in arrears. The first
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the aggregate  draw downs made by Borrower  under Tranche A. The next
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the aggregate  draw downs made by Borrower  under Tranche A. The next
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the  aggregate  draw  downs  made by  Borrower  under  Tranche A. The
remaining four payments shall be in substantially  equal amounts and shall total
* of the  aggregate  draw  downs  made by  Borrower  with  respect to Tranche A;
PROVIDED that the final installment shall be in the amount necessary to repay in
full the unpaid principal balance of this Tranche A Note.






                                      EXHIBIT D

                        FORM OF TRANCHE B PROMISSORY NOTE

         THIS NOTE HAS NOT BEEN REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS
         AMENDED, OR ANY OTHER APPLICABLE SECURITIES LAWS. IT MAY NOT BE SOLD OR
         OTHERWISE  TRANSFERRED  UNDER  CIRCUMSTANCES  THAT  WOULD  RESULT  IN A
         VIOLATION OF THE  REGISTRATION  REQUIREMENTS  OF THE  SECURITIES ACT OF
         1933 OR SUCH OTHER LAWS.

U.S.$10,000,000

                  FOR VALUE RECEIVED, the undersigned,  Pathnet Operating,  Inc.
("Borrower"),  a limited liability company organized and existing under the laws
of the State of Delaware, HEREBY UNCONDITIONALLY PROMISES TO PAY to the order of
Cisco  Systems  Capital  Corporation  ("Lender"),  a  corporation  organized and
existing under the laws of the State of Nevada, the principal sum of TEN MILLION
United  States  Dollars  (U.S.$10,000,000),  or such greater or lesser amount as
represents the aggregate  principal  amount of the Tranche B loans (the "Loans")
made by Lender to Borrower  pursuant to the Credit Agreement  referred to below,
quarterly in arrears,  payable on the dates and in the amounts  indicated in the
amortization  schedules  set forth in the Annex  attached  hereto (the last such
date being hereinafter referred to as the "Maturity Date").

                  Borrower  further  promises to pay  interest on the  principal
amount of each Loan  outstanding  hereunder  on each  Interest  Payment Date (as
defined  below) until the Maturity  Date, at a rate per annum equal at all times
during each Interest Period for such Loan to LIBOR for such Interest Period plus
* per annum.

                  The period  between the date of a Loan and the  Maturity  Date
shall be divided into  successive  periods,  each such period being an "Interest
Period" for purposes of this Promissory  Note. The initial Interest Period for a
Loan  shall  begin on the date such  Loan is made and end on the next  Quarterly
Date.  Each  subsequent  Interest  Period  shall  begin  on the  last day of the
immediately  preceding  Interest  Period  and shall  end on the next  succeeding
Quarterly Date (with the last Interest  Period to end on the Maturity  Date). As
used  herein,  "LIBOR"  means for any  Interest  Period the rate of interest per
annum determined by Lender to be the rate of interest per annum (rounded upward,
if  necessary,  to the  nearest  1/100 of 1%) for  deposits in Dollars for three
months  appearing  on the  display  page  designated  as "3750" in the Dow Jones
Market Service (formerly known as the Telerate Service), or any replacement page
thereof in the Dow Jones Market  Service  displaying  London  interbank  offered
rates of major banks for Dollar  deposits,  at or about 11:00 a.m. (London time)
on the second  Banking Day  preceding the first day of the  applicable  calendar
quarter in which such Interest Period occurs,  provided that if no, or only one,
such offered  quotation  appears on such display page (or such other replacement
page),  "LIBOR" shall be determined by reference to the Reuters Screen LIBO Page
of the Reuters Monitor Money Rates Service (or any  replacement  page thereof or
other applicable  Reuters display page) or other  comparable  source of interest
quotations for such interbank  rates  selected by Lender;  and "Quarterly  Date"
means the last day of each calendar quarter.

                  Interest on each Loan shall be payable in arrears to Lender on
the last day of each calendar  quarter and on the Maturity Date (each such date,
an "Interest Payment Date");  provided that if any prepayment hereof is effected
other than on an Interest Payment Date,  accrued interest hereon shall be due on
such prepayment date as to the principal amount prepaid.

                  In the event that any amount of  principal  hereof or interest
thereon,  or any other amount payable  hereunder or under the Credit  Agreement,
shall not be paid in full when due (whether at stated maturity,  by acceleration
or  otherwise),  Borrower  shall pay interest  (after as well as before entry of
judgment  thereon  to the  extent  permitted  by law) on such  unpaid  amount to
Lender, from the date such amount becomes due until the date such amount is paid
in full,  payable on demand of Lender,  at a fluctuating rate per annum equal at
all times to the Prime Rate (as  defined  below) plus * per annum  (the "Default
Rate").  Additionally,   and  without  limiting  the  foregoing,  following  the
occurrence and during the continuance of any Event of Default,  at the option of
Lender,  the  interest  rate on all  Loans  outstanding  hereunder  shall be the
Default Rate.

                  As used  herein,  "Prime  Rate"  means for any day the rate of
interest in effect for such day as publicly  announced from time to time by Bank
of America,  N.A.,  as its prime rate.  Each change in the interest  rate hereon
based on a change  in the  prime  rate  shall be  effective  at the  opening  of
business on the day specified in the public announcement of such change.

                  All  computations  of interest  hereunder shall be made on the
basis of a year of 360 days  for the  actual  number  of days  occurring  in the
period for which any such interest or fee is payable.

                  Whenever any payment  hereunder  shall be stated to be due, or
whenever any Interest  Payment Date or any other date specified  hereunder would
otherwise  occur, on a day other than a Banking Day, then,  except to the extent
otherwise  provided  hereunder,  such payment  shall be made,  and such Interest
Payment Date or other date shall occur, on the next succeeding  Banking Day, and
such  extension  of time shall in such case be  included in the  computation  of
payment of interest hereunder;  PROVIDED,  HOWEVER, that if such extension would
cause such payment to be made,  or such  Interest  Payment Date or other date to
occur, in the next following calendar month, such payment shall be made and such
Interest  Payment Date or other date shall occur on the next  preceding  Banking
Day. As used herein,  "Banking  Day" means a day other than a Saturday or Sunday
on which  commercial banks are not required or authorized by law to close in San
Jose,  California,  except  that if the  applicable  Banking  Day relates to any
determination  of LIBOR,  "Banking  Day" means such a day on which  dealings are
carried out in the applicable offshore U.S. Dollar interbank market.

                  Each  such  payment  shall be made on the date  when  due,  in
immediately  available  funds,  to Lender's  account at Bank of  America,  N.A.,
Concord,  California,  ABA no.  12100358,  to account  number  1233124070,  ref.
"Pathnet Operating, Inc.," or to such other account of Lender as it from time to
time shall designate in a written notice to Borrower.

                  All payments of principal,  interest and other amounts made on
or in respect to this Promissory Note shall be made in United States Dollars for
value received on the date of payment,  without setoff,  counterclaim or, to the
extent permitted by applicable law,  defense,  and free and clear of and without
deduction for any present and future Taxes or charges whatsoever.

                  Lender  shall  record the date and amount of each Loan made to
Borrower, the amount of principal and interest due and payable from time to time
hereunder,  each payment thereof,  and the resulting  unpaid  principal  balance
hereof, in Lender's  internal records,  and any such records shall be conclusive
evidence absent manifest error of the amount of the Loans made by Lender and the
interest and payments thereon;  PROVIDED,  however,  that Lender's failure so to
record shall not limit or otherwise affect the obligations of Borrower hereunder
and under the Credit  Agreement  to repay the  principal  of and interest on the
Loans.

                  This  Promissory Note is a Note referred to in, and is subject
to and entitled to the benefits of, the Agreement  dated as of September 7, 2000
(as  amended,  modified,  renewed or  extended  from time to time,  the  "Credit
Agreement") among Pathnet  Telecommunications,  Inc. ("Holdings"),  Borrower and
Lender.  Capitalized  terms  used  herein  shall  have the  respective  meanings
assigned to them in the Credit Agreement.

                  The  Credit  Agreement  provides,   among  other  things,  for
acceleration  (which in certain cases shall be automatic) of the maturity hereof
upon the occurrence of certain stated events, in each case without  presentment,
demand, protest or further notice of any kind, all of which are hereby expressly
waived.

                  This  Promissory  Note is subject to prepayment in whole or in
part as provided in the Credit Agreement.

                  Borrower  hereby  waives  diligence,  presentment,  protest or
notice  of  total  or  partial  nonpayment  or  dishonor  with  respect  to this
Promissory Note.

                  Failure by the  holder  hereof to  exercise  any of its rights
hereunder in any instance  shall not  constitute a waiver thereof in that or any
other instance.

                  Borrower  agrees to pay on demand  all costs and  expenses  of
Lender and its  affiliates,  and fees and  disbursements  of counsel  (excluding
allocated  costs and expenses for internal legal  services),  in connection with
the enforcement or attempted  enforcement of, and  preservation of any rights or
interests under, (i) this Promissory Note, and (ii) any out-of-court  workout or
other  refinancing  or  restructuring  or any  bankruptcy or insolvency  case or
proceeding,  including any losses,  costs and expenses  sustained by Lender as a
result of any  failure  by  Borrower  to  perform  or  observe  its  obligations
contained herein.

                  THIS  PROMISSORY  NOTE SHALL BE GOVERNED BY, AND  CONSTRUED IN
ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                  Borrower hereby (a) submits to the non-exclusive  jurisdiction
of the  courts of the  State of New York and the  Federal  courts of the  United
States  sitting  in the  Borough  of  Manhattan  (collectively,  the  "New  York
Courts"), for the purpose of any action or proceeding arising out of or relating
to this  Promissory  Note, (b)  irrevocably  waives (to the extent  permitted by
applicable  law) any objection  which it now or hereafter may have to the laying
of venue of any such action or proceeding brought in any of the New York Courts,
and any  objection on the ground that any such action or  proceeding  in any New
York Court has been brought in an  inconvenient  forum,  and (c) agrees that (to
the extent  permitted by applicable  law) a final judgment in any such action or
proceeding  brought in a New York Court shall be conclusive  and may be enforced
in other  jurisdictions by suit on the judgment or in any other manner permitted
by law.

                  IN WITNESS  WHEREOF,  Borrower  by its duly  authorized  legal
representatives  has executed this  Promissory  Note on the date and in the year
first above mentioned.




                                BORROWER

                                Pathnet Operating, Inc.



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









                       ANNEX TO TRANCHE B PROMISSORY NOTE


         AMORTIZATION


         Payments  shall  commence  on the last day of the  quarter in which the
Commitment Expiry Date occurs and shall amortize quarterly in arrears. The first
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the aggregate  draw downs made by Borrower  under Tranche B. The next
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the aggregate  draw downs made by Borrower  under Tranche B. The next
four  payments of principal  shall be in  substantially  equal amounts and shall
total * of the  aggregate  draw  downs  made by  Borrower  under  Tranche B. The
remaining four payments shall be in substantially  equal amounts and shall total
* of the  aggregate  draw  downs  made by  Borrower  with  respect to Tranche B;
PROVIDED that the final installment shall be in the amount necessary to repay in
full the unpaid principal balance of this Tranche B Note.






                                  SCHEDULE 1.1

                                 EXISTING LIENS

None.







                                  SCHEDULE 2(L)

                               MATERIAL CONTRACTS

1.       Master Service Agreement between I-Link Communications,  Inc., Pathnet,
         Inc. and Pathnet Operating, Inc. dated May 19, 2000

2.       Master Service  Agreement  between DSL Internet  Corporation,  Pathnet,
         Inc. and Pathnet Operating, Inc. dated May 24, 2000

3.       Service  Agreement  between Henkels and McCoy,  Inc. and Pathnet,  Inc.
         dated  March 6,  2000  concerning  certain  construction  services,  as
         assigned to Borrower (consent to assignment required)


4.       Fiber Optic Cable Engineering and Construction  Agreement dated January
         31, 2000 between Pathnet,  Inc., and Alcoa Fujikura,  Ltd., as assigned
         to Borrower

5.       Statement  of  Work  designated   Pathnet_Staging_TSOW_2000.v6  between
         Pathnet Operating, Inc. and Cisco Systems, Inc., executed by Pathnet on
         May 26, 2000 (pending execution - consent to assignment required)

6.       Construction Agreement dated March 31, 1999 between Pacific Fiber Link,
         LLC and Pathnet, Inc., as amended and assigned to Borrower

7.       Fiber Optic Cable Construction and Use Agreement between Public Service
         Company of New Mexico and Pathnet,  Inc., dated 6/9/99,  as assigned to
         Borrower (consent to assignment required)

8.       Fiber Optic Cable License  Agreement  between Pathnet,  Inc. and Public
         Service Company of New Mexico, dated 12/23/99,  as assigned to Borrower
         (consent to assignment required)

9.       Agreement between Pathnet,  Inc and CapRock  Telecommunications,  dated
         11/18/99 as assigned to Borrower

10.      Dark Fiber  Network  Agreement  dated  August  1999  between  Tri-State
         Generation  and  Transmission   Association,   Inc.,   Empire  Electric
         Association,  Inc., La Plata Electric Association, Inc., Delta-Montrose
         Electric  Association,  Inc.  San Miguel  Power  Association,  Inc. and
         Pathnet, Inc., as assigned to Borrower

11.      Fiber  Optic Lease  between  Burlington  Northern  and Santa Fe Railway
         Company and Pathnet Telecommunications,  Inc., dated March 31, 2000, as
         assigned to Borrower and PRE pursuant to the Right of Way  Contribution
         Agreement (consent to assignment required)

12.      Goldman Sachs engagement letter dated May 2, 2000

13.      Master  Software  License and Services  Agreement  dated  December 1999
         between  MetaSolv  Software,  Inc. and Pathnet,  Inc.,  and executed by
         Pathnet, Inc. on December 29, 2000, as assigned to Borrower (consent to
         assignment required)

14.      Intercompany  Services  Agreement  dated  on or about  the date  hereof
         between Pathnet Operating, Inc. and Pathnet, Inc.


15.      Tax Sharing Agreement dated on or about the date hereof between Pathnet
         Operating,  Inc.  and  Pathnet  Telecommunications,  Inc.  (consent  to
         assignment required)