Document:

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                      SUBORDINATION AND INTERCREDITOR AGREEMENT

          THIS SUBORDINATION AND INTERCREDITOR AGREEMENT (this "SUBORDINATION
AGREEMENT"), dated as of October 14, 1999 is made by and among (a) AFS Funding
Corp., a Nevada Corporation ("BORROWER"); (b) AFS Funding Trust, a Delaware
Business Trust ("AFSFT"); (c) the AmeriCredit 1996-C Trust, the AmeriCredit
1996-D Trust, the AmeriCredit 1997-A Trust, the AmeriCredit 1997-B Trust, the
AmeriCredit 1997-C Trust, the AmeriCredit 1997-D Trust, the AmeriCredit 1998-A
Trust, the AmeriCredit 1998-B Trust, the AmeriCredit 1998-C Trust, the
AmeriCredit 1998-D Trust, the AmeriCredit 1999-A Trust, the AmeriCredit 1999-B
Trust, the AmeriCredit 1999-C Trust (collectively, the "ISSUERS"); (d)
AmeriCredit Financial Services, Inc., a Delaware corporation ("ACFS"), (e)
AmeriCredit Management Company, a Delaware corporation ("AMC"), (f) AmeriCredit
Corp., a Texas corporation ("ACC"); (g) Bankers Trust Company, a New York
banking Corporation, not in its individual capacity, but solely in its capacity
as Lender Collateral Agent under the Security Agreement (as defined below) (the
"LENDER COLLATERAL AGENT"), (h) Bankers Trust (Delaware), a Delaware banking
corporation ("BANKERS TRUST (DELAWARE)"), not in its individual capacity, but
solely in its capacity as Owner Trustee; (i) Credit Suisse First Boston, a Swiss
banking corporation acting through its New York branch ("CSFB"), in its capacity
as Administrative Agent under the Credit Agreement (defined below), (j) those
Lenders from time to time party to the Credit Agreement (defined below)(the
"Lenders" and collectively with the Lender Collateral Agent and CSFB, the
"JUNIOR LIEN HOLDERS"); (k) Financial Security Assurance Inc., a New York stock
insurance company ("FSA"), (l) Harris Trust and Savings Bank, an Illinois
banking corporation ("Harris Trust"), LaSalle Bank National Association formerly
known as LaSalle National Bank ("LaSalle"), and Bank One N.A., (each in its
capacity as "Collateral Agent" under that certain Spread Account Agreement dated
as of December 1, 1994, (as amended and restated May 11, 1998, and as amended
and or restated from time to time thereafter) and such other entities as may be
designated as "Collateral Agent" under the Underlying Transaction Documents or
the Spread Account Agreement, together with their respective successors or
assigns, if any (collectively the "SENIOR LIEN HOLDERS"). All capitalized terms
used but not otherwise defined herein shall have the respective meanings set
forth in Appendix A attached hereto.

                               R E C I T A L S

     A.   FSA is the "Controlling Party" as that term is defined in the
Underlying Transaction Documents.

     B.   FSA issued and will issue insurance policies to the Senior Lien
Holders in such Senior Lien Holders' capacity as the trustee or indenture
trustee, as applicable (in such capacity, the "UNDERLYING TRUSTEE"), to
guarantee certain scheduled payments to

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holders of notes or certificates, as applicable (the "NOTEHOLDERS" or
"CERTIFICATEHOLDERS") issued by the Issuers (the "INSURER OBLIGATIONS").

          C.   Pursuant to that certain Credit Agreement ("CREDIT AGREEMENT")
dated as of October 14, 1999 among Borrower, ACC, ACFS, AMC, the Lenders, the
Lender Collateral Agent, and CSFB (in its capacity as Administrative Agent), the
Lenders will extend certain financial accommodations to the Borrower of up to
$225,000,000.

          D.   Pursuant to that certain Security and Collateral Agent Agreement
("SECURITY AGREEMENT") dated as of October 14, 1999 among CSFB (in its capacity
as "Agent"), the Lender Collateral Agent, the Borrower granted a lien on the
Borrower's right, title and interest in and to the Borrower Collateral (as such
term is defined in Section 3 of the Security Agreement) to the Lender Collateral
Agent for the benefit of the Lenders (the "JUNIOR LIEN").  The obligations of
Borrower to the Junior Lien Holders, whether under the Credit Agreement or
otherwise, are referred to herein as the "JUNIOR LOAN."

          E.   It is a condition precedent to the Credit Agreement that FSA
consent to the Junior Lien on the Borrower Collateral and FSA is willing to
consent solely upon and in accordance with the terms and conditions set forth
herein.

          NOW, THEREFORE, in consideration of the premises and in order to
induce FSA and Senior Lien Holders to consent, the Junior Lien Holders, the
Borrower, ACC, ACFS, AMC, AFSFT, the Issuers, the Senior Lien Holders and FSA
hereby agree as follows:

                                   ARTICLE I.

                               THE SUBORDINATION

          1.1  AGREEMENT TO SUBORDINATE.  Each Junior Lien Holder, each Issuer
and Borrower agrees that any and every lien and security interest, whether now
existing or hereinafter granted, in the Borrower Collateral in favor of or held
for the benefit of Senior Lien Holders or FSA has and shall have priority over
any lien or security interest that any Junior Lien Holder now has or may
hereafter acquire in the Borrower Collateral notwithstanding (a) any statement
or provision to the contrary, whether or not contained in any agreement,
instrument or document; (b) irrespective of the time or order of filing or
recording of financing statements, deeds of trust, mortgages or other notices of
security interests, liens or assignments granted pursuant thereto; (c)
irrespective of anything contained in any filing or agreement to which any party
hereto or its respective successors and assigns may now or hereafter be a party;
and (d) irrespective of the ordinary rules for determining priorities under the
UCC or under any other law governing the relative priorities of secured
creditors.  Subject to the provisions of Section 1.2(f) and (f), the Junior Loan
and all advances made under the Credit Agreement and the other

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Transaction Documents (without regard to the application of such advances) are
hereby, and shall continue to be, subject and subordinate in lien and in
payment to: (a) the Senior Lien Holders, FSA and the Certificateholders and
Noteholders; (b) the Underlying Transaction Documents and all sums due
thereunder; and (c) all interest, premiums and all other sums due to the
Senior Lien Holders, FSA or the Certificateholders and Noteholders.  Subject
to the provisions of Section 1.2(f) and (f), all of the terms, covenants and
conditions of the Transaction Documents in connection with or relating to
Borrower or Borrower Collateral are hereby, and shall continue to be,
subordinate to all of the terms, covenants and conditions of the Underlying
Transaction Documents.  For the avoidance of any doubt, nothing contained in
this Subordination Agreement shall afect the rights of the Junior Lien Holders
under the Credit Agreement and the Security Agreement with respect to the
obligations of ACC, AMC, and ACFS, respectively, under the Credit Agreement
and the Security Agreement.

          1.2  SUSPENSION OF REMEDIES OF JUNIOR LIEN HOLDER.  For purposes of
this Subordination Agreement, the "SENIOR SECURED OBLIGATIONS" shall mean all
indebtedness and other obligations of any kind of the Borrower or payable from
the Borrower Collateral owed to each of the Underlying Trustees, the Senior Lien
Holders, FSA and the Noteholders and Certificateholders in connection with the
Underlying Transactions.  Until the Senior Secured Obligations have been fully
and indefeasibly paid in full in cash and the Final Insurance Termination Date
shall have occurred:

               (a)  No Junior Lien Holder shall have any right to receive any
payment, dividend or other distribution from Borrower, any Issuer or any
Underlying Trustee whether from or by way of the Borrower Collateral or
otherwise, or to enforce any security interest in, foreclose, levy or execute
upon, or collect or attach the Borrower Collateral or any other assets of
Borrower, any Issuer or any Underlying Trustee, whether by private or judicial
action or otherwise except to the extent set forth in this Section 1.2 below;

               (b)  Each Junior Lien Holder agrees that any payments, dividends
or other distribution received from Borrower, any Issuer or any Underlying
Trustee, directly or indirectly, in violation of this Subordination Agreement,
in cash or other property, by setoff or in any other manner, whether from or by
way of the Borrower Collateral or otherwise, shall be received in trust for the
benefit of the Senior Lien Holders, FSA and the Noteholders and
Certificateholders as their interests may appear pursuant to the Underlying
Transaction Documents, shall be held in the same form in which it is received
and shall be immediately turned over to the Senior Lien Holders, FSA or the
Noteholders and Certificateholders for the benefit of the Senior Secured
Obligations as their respective interests may appear;

               (c)  Each Junior Lien Holder agrees not to ask, demand, take or
receive from Borrower, any Issuer or any Underlying Trustee, directly or
indirectly, in cash or other property or by setoff or in any other manner,
whether from or by way of the

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Borrower Collateral or otherwise, any payment, dividend or other distribution
except to the extent expressly set forth in this Subordination Agreement; and

               (d)  Each Junior Lien Holder agrees that it will not take any
action, or cause any action to be taken, which would be prejudicial to or
inconsistent with the priority position of the Senior Lien Holders, FSA or the
Certificateholders or Noteholders under this Subordination Agreement or with the
Senior Lien Holders', FSA's or Certificateholders' or Noteholders'  rights under
the Underlying Transaction Documents.

               (e)  Each Junior Lien Holder may receive and retain any and all
amounts released to or for the account of Borrower or AFSFT in accordance with
the terms and conditions of the Underlying Transaction Documents and paid over
to Junior Lien Holder in accordance with the Underlying Transaction Documents,
the RCCA Agreement or the Certificate Pledge Agreement.

               (f)  Each Junior Lien Holder (i) may receive payments from ACC,
AMC and ACFS, respectively in accordance with the provisions of Article II(A)
and/or Section 2.05(e) of the Credit Agreement, and (ii) may enforce its rights
against ACC, AMC, or ACFS respectively in accordance with Section 6.02 of the
Credit Agreement.

          1.3  DEFINITION OF PROCEEDING.  "Proceeding" as used herein means any
voluntary or involuntary bankruptcy, insolvency, arrangement, reorganization,
receivership, relief or similar proceedings or upon an assignment for the
benefit of creditors or any other marshaling of the assets and liabilities of
any Issuer or Borrower or any other distribution of all or any of the assets of
any Issuer or Borrower to creditors of any Issuer or Borrower upon the
dissolution, winding up, liquidation, arrangement, reorganization, adjustment,
protection, relief or composition of any Issuer or Borrower or its debts.  Upon
the occurrence of any Proceeding, any payment or distribution of any kind
(whether in cash, property or securities) which otherwise would be payable or
deliverable upon or with respect to the Borrower Collateral to the Junior Lien
Holders shall be paid or delivered directly to the Senior Lien Holders for
application (in the case of cash) to or as collateral (in the case of noncash
property or securities) for the Senior Secured Obligations until the Senior
Secured Obligations shall have been fully and indefeasibly paid in full in cash.

          1.4  NO COMMENCEMENT OF ANY PROCEEDING.  Each Junior Lien Holder
agrees that, prior to the date which is one year and one day after the later of:
(a) the date on which all Senior Secured Obligations have been fully and
indefeasibly paid in full in cash and (b) the Final Insurance Termination Date,
such Junior Lien Holder will not commence, or join with any creditor in
commencing or maintaining, any Proceeding by or against Borrower, or any Issuer.
This Section 1.4 shall survive the termination of this Subordination Agreement.

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          1.5  NONASSIGNABILITY OF JUNIOR LOAN AND LIENS CONSENTED TO.  This
Subordination Agreement shall be binding upon and shall inure to the benefit of
the parties hereto and their respective successors, participants, transferees
and assigns (collectively, "ASSIGNEES") including any Assignee who may be in
interest as a matter of applicable law such as a receiver or trustee or any
Assignee purporting to obtain an interest in violation of the provisions of this
Subordination Agreement.  Each Junior Lien Holder hereby covenants and agrees
that none of its legal or beneficial right, title or interest in or to the
Borrower Collateral or under the Transaction Documents may be sold, assigned,
participated, syndicated, pledged, encumbered or transferred, in whole or in
part, absolutely or collaterally, other than in accordance with the provisions
of the Credit Agreement as in effect on the date hereof and with the provisions
of this Subordination Agreement.  Any attempt to transfer, directly or
indirectly, all or any portion of the Junior Loan, the Junior Lien or any rights
under any other Transaction Document or to transfer any Junior Lien Holder's
interest in the Borrower Collateral in violation of this Subordination Agreement
shall be null and void, AB INITIO.

          1.6  MARSHALING; PAYMENTS SET ASIDE.  None of Senior Lien Holders,
FSA, the Noteholders or the Certificateholders  shall be under any obligation to
marshal any assets in favor of any Junior Lien Holder, Borrower, any Issuer or
any other Person or against or in payment of any or all of the Senior Secured
Obligations.  Each Junior Lien Holder, Borrower and each Issuer hereby waives
any and all rights each shall have at any time under any law pertaining to
marshaling of assets, the sale of property in the inverse order of alienation,
the administration of estates of decedents, appraisement, valuation, stay,
extension or redemption or any other similar laws or equitable principles as now
or hereafter in force to the fullest extent permitted by applicable law.

          1.7  NO SET-OFFS BY JUNIOR LIEN HOLDER.  Until the Final Insurance
Termination Date, each Junior Lien Holder hereby agrees that it may not exercise
any right of set off, recoupment, banker's lien, statutory lien or any similar
right under any applicable law or in equity against Borrower or any Issuer.  If
any action is taken in violation of this provision or if the preceding sentence
should be inapplicable or unenforceable in any respect, each Junior Lien Holder
agrees that the exercise of any such right shall be for the benefit of the
Senior Lien Holders, FSA and the Certificateholders and Noteholders and agrees
to immediately turn over the proceeds of any such set off, recoupment or lien to
the Senior Lien Holders for application to the Senior Secured Obligations.

          1.8  NO RIGHTS OF SUBROGATION.  Each Junior Lien Holder agrees that no
payment or distribution to the Senior Lien Holders pursuant to the provisions of
this Subordination Agreement shall entitle any Junior Lien Holder to exercise
rights of subrogation, if any, until the Final Insurance Termination Date.
Nothing contained in this Subordination Agreement shall constitute an assignment
by any party to another.  Nothing contained in this Subordination Agreement is
intended to or shall excuse or alter, as between Borrower and each Junior Lien
Holder, any of the obligations of Borrower to

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each Junior Lien Holder, or to affect the relative rights against Borrower of
each Junior Lien Holder and creditors of Borrower other than the rights of the
Senior Lien Holders and FSA and the Noteholders and Certificateholders and
each Junior Lien Holder as between them.  Each Junior Lien Holder, each Issuer
and Borrower agrees to and hereby does expressly waive to the fullest extent
permitted under applicable law any and all rights, whether at law or in
equity, (a) except as expressly required of FSA pursuant to Section 8.14 of
the RCCA Agreement, to request or compel the Senior Lien Holders, FSA or the
Noteholders or Certificateholders to give notice to any Junior Lien Holder of
any action taken (or not taken) by the Senior Lien Holders, FSA or the
Noteholders or Certificateholders with respect to the Borrower Collateral, the
Senior Secured Obligations or otherwise under the Underlying Transaction
Documents the RCCA Agreement or this Subordination Agreement; (b) to request
or compel marshaling with respect to the Borrower Collateral held for the
Senior Secured Obligations; or (c) to challenge the validity, enforceability
or first priority of the Senior Lien Holders' and FSA's claims and liens or
the exercise of any rights or remedies by the Senior Lien Holders, FSA or the
Noteholders or Certificateholders pursuant to the Underlying Transaction
Documents, the RCCA Agreement or this Subordination Agreement.

          1.9  FURTHER ASSURANCES.  Each Junior Lien Holder, each Issuer and
Borrower will, at its expense and at any time and from time to time, promptly
execute and deliver all further instruments and documents, and take all further
action (other than any action to commence or maintain a Proceeding), that may be
necessary, or that any of the Senior Lien Holders, FSA or the Certificateholders
or Noteholders may reasonably request, in order to protect any right or interest
granted or purported to be granted hereby or to enable the Senior Lien Holders,
FSA or the Certificateholders or Noteholders to exercise and enforce its rights
and remedies under this Subordination Agreement or the Underlying Transaction
Documents.

          Each Junior Lien Holder, each Issuer and Borrower agrees that the
Senior Lien Holders, FSA and the Certificateholders and Noteholders shall have
all of the rights, remedies, immunities, indemnities and discretion provided in
connection with the Underlying Transaction Documents, including, without
limitation, the right to extend, renew, modify, increase, waive or amend any of
the terms thereof, to sell, exchange, release or otherwise deal with any of the
Borrower Collateral, release Borrower, any Issuer or any other person liable in
any manner for any obligations owed to the Senior Lien Holders, FSA or the
Certificateholders or Noteholders, or exercise or refrain from exercising any
rights thereunder or at law as though specifically set forth herein.  The
foregoing reservation of rights and remedies under the Underlying Transaction
Documents shall further include, without limitation, the right to charge a
default rate of interest on any amounts owed thereunder, to foreclose upon the
Borrower Collateral as provided therein, and to purchase in lieu of redemption
any Certificates and any Notes (as the terms "Certificates" and "Notes" are
defined in the Underlying Transaction Documents).

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          Any and all such rights, remedies, actions or omissions in the Senior
Lien Holders' or FSA's discretion may be taken or not taken without incurring
any responsibility or liability to any Junior Lien Holder, without impairing or
releasing the obligations of Borrower, any Issuer or any Junior Lien Holder
under this Subordination Agreement, without otherwise affecting the rights of
the Senior Lien Holders or FSA under this Subordination Agreement or any
Underlying Transaction Document and without any notice to or consent of any
Junior Lien Holder.

          The rights of the Senior Lien Holders, FSA and the Noteholders and
Certificateholders under this Subordination Agreement shall not be prejudiced or
impaired by any action or omission of the Senior Lien Holders, Borrower, any
Issuer, any Underlying Trustee, any Junior Lien Holder or any person in custody
of the Borrower Collateral or the assets, property or operations of Borrower or
any Issuer or by the failure of Borrower, any Issuer, or any Junior Lien Holder
to comply with any of the terms of this Subordination Agreement, the Transaction
Documents or the Underlying Transaction Documents.

          Each Junior Lien Holder agrees not to directly or indirectly
challenge, contest, or participate in any effort to challenge, contest, set
aside, alter, amend or modify the rights and priorities set forth in the
Underlying Transaction Documents or this Subordination Agreement.

          1.10 AGREEMENT BY BORROWER, JUNIOR LIEN HOLDERS, AND ISSUERS.  Each of
Borrower, each Junior Lien Holder, and each Issuer agrees that it will not (a)
take any other action, in contravention of the provisions of this Subordination
Agreement, (b) challenge, directly or indirectly, the enforceability or validity
of this Subordination Agreement, any of the Underlying Transaction Documents or
any of the provisions hereof or thereof, or (c) challenge, directly or
indirectly, the true sale nature and absolute assignment of all or any Issuer's,
any Senior Lien Holder's or FSA's interest in the Trust Estate (as defined in
the Underlying Transaction Documents) or the Spread Account.

          1.11 OBLIGATIONS HEREUNDER NOT AFFECTED.  All rights and interests of
the Senior Lien Holders, FSA and the Noteholders and Certificateholders under
this Subordination Agreement, and all agreements and obligations of the Junior
Lien Holders, the Borrower and the Issuers under this Subordination Agreement,
shall remain in full force and effect irrespective of:

               (a)  any lack of validity or enforceability of any Transaction
Document or Underlying Transaction Document or any other agreement or instrument
relating thereto;

               (b)  any change in any term of any Transaction Document or
Underlying Transaction Document, or any other amendment or waiver of or any
consent to departure from any Transaction Document or Underlying Transaction
Document;

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               (c)  any exchange, release or non-perfection of the Borrower
Collateral or other collateral, or any release or amendment or waiver of or
consent to departure from any of the terms of the Senior Secured Obligations; or

               (d)  any other circumstance which might otherwise constitute a
defense available to, or a discharge of, Borrower, any Issuer, or any guarantor
or subordinated creditor.

Notwithstanding anything contained in this Subordination Agreement or any
Transaction Document, this Subordination Agreement shall continue to be
effective or be reinstated, as the case may be, if at any time any payment to
any of the Senior Lien Holders, FSA or any Noteholder or Certificateholder from
Borrower, any Issuer or any other person or by way of enforcement of any
remedies or otherwise from the Borrower Collateral, in each case to the extent
paid, is rescinded, avoided or must otherwise be returned or paid by any Senior
Lien Holder, FSA or any Noteholder or Certificateholder for any reason, whether
following the institution of a Proceeding or otherwise, under any bankruptcy
law, state or federal law, common law or equitable cause, all as though such
payment had not been made and, in that event, the obligations of the parties
hereunder shall be revived with respect to such amounts ("REVIVED CLAIMS"), all
of which shall constitute Senior Secured Obligations.

          1.12 PAYMENTS AND DISTRIBUTIONS HELD IN TRUST.  All payments,
dividends or other distributions from or by way of the Borrower Collateral,
which are received by a Junior Lien Holder contrary to the provisions of this
Subordination Agreement shall be received in trust for the benefit of the Senior
Lien Holders, FSA and the Noteholders and Certificateholders, shall be held in
the same form received, and shall be segregated from other funds and property
held by any Junior Lien Holder and shall immediately be paid over to the Senior
Lien Holders in the same form as received (with any necessary endorsement) to be
applied (in the case of cash) to or held as collateral (in the case of noncash
property or securities) for the Senior Secured Obligations in accordance with
the terms of the Underlying Transaction Documents until the Senior Secured
Obligations are fully and indefeasibly paid in full in cash.

          1.13 FURTHERANCE OF SUBORDINATION.

               (a)  REMEDIES LIMITED.  Notwithstanding anything in this
Subordination Agreement or in any other Transaction Document to the contrary,
all rights and remedies of Lenders, Collateral Agent, Administrative Agent,
Secured Parties, Affected Parties or any of them whether hereunder, under any
Transaction Document or otherwise at law or in equity are subject to the terms
of this Subordination Agreement.

               (b)  OBLIGATIONS LIMITED.  Notwithstanding anything in this
Subordination Agreement or in any other Transaction Document to the contrary,
none of Borrower, any Issuer, or any Underlying Trustee shall have any
obligation or liability to the Administrative Agent, any Secured Party, any
Lender, or any Affected Party or any of

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them, whether hereunder, under any Transaction Document or otherwise at law or
in equity until the Final Insurance Termination Date if the effect of such
obligation or liability would be to cause any of Borrower, Issuer or
Underlying Trust to not be Solvent and no such obligation shall be or become
due or payable until such time.

               (c)  SUBORDINATION AGREEMENT GOVERNS.  Notwithstanding any other
provision of this Subordination Agreement or any other Transaction Document, in
the event of any contradiction or ambiguity between this Subordination Agreement
and any other Transaction Document, the terms of this Subordination Agreement
shall govern.  All disputes with respect to matters addressed in this
Subordination Agreement shall be determined by reference to this Subordination
Agreement exclusively and no provision of this Subordination Agreement or any
other Transaction Document should be interpreted as altering, amending,
explaining or clarifying any provision of this Subordination Agreement.

               (d)  NOTE LEGEND.   Each Junior Lien Holder hereby covenants and
agrees to legend each Note issued pursuant to the Credit Agreement or other
Transaction Document with the Note Legend attached as Exhibit II hereto.

               (e)  SURVIVAL.  The provisions of this Section 1.13 are for the
benefit of FSA and the Senior Lien Holders and, accordingly, shall survive the
termination of this Subordination Agreement.

          1.14 RCCA ACCOUNT COLLATERAL.  For the avoidance of any doubt, and
notwithstanding anything contained in this Subordination Agreement or the
Transaction Documents, the Senior Lien Holders are not entitled to any of the
RCCA Account Collateral other than in accordance with the terms and provisions
of the RCCA Agreement.

                                  ARTICLE II.

                         REPRESENTATIONS AND WARRANTIES

          2.1  REPRESENTATIONS AND WARRANTIES OF JUNIOR LIEN HOLDER. (a) Each
Junior Lien Holder, other than the Lender Collateral Agent, represents and
warrants that it is a Lender under the Credit Agreement and that, as a Lender,
it holds the percentage set forth in Appendix B attached hereto of the legal and
beneficial interests, obligations and liens under the Credit Agreement and other
Transaction Documents.  Each Junior Lien Holder, other than the Lender
Collateral Agent, covenants that it will not sell, transfer, syndicate,
participate, pledge, encumber or otherwise assign, in whole or in part, all or
any portion of its interests, obligations or liens in or under any of the
Transaction Documents except to a Permitted Transferee in accordance with the
provisions of paragraph 1.5 hereof.

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               (b)  Each of the Junior Lien Holders represents and warrants that
the execution and delivery of this Subordination Agreement has been duly
authorized by all necessary corporate action.

               (c)  Each of the Junior Lien Holders represents and warrants that
this Subordination Agreement has been duly executed and delivered by each person
and constitutes the legal, valid and binding obligation of each person,
enforceable against each person in accordance with its terms.

          2.2  REPRESENTATIONS AND WARRANTIES OF LENDER COLLATERAL AGENT

               (a)  Lender Collateral Agent represents and warrants that the
execution and delivery of this Subordination Agreement has been duly authorized
by all necessary corporate action.

               (b)  Lender Collateral Agent represents and warrants that this
Subordination Agreement has been duly executed and delivered by each person and
constitutes the legal, valid and binding obligation of each person, enforceable
against each person in accordance with its terms.

               (c)  Lender Collateral Agent is a separate legal entity from
Bankers Trust (Delaware) and has not authority or ability to direct the actions
of Bankers Trust (Delaware) as Owner Trustee.

          2.3  REPRESENTATIONS AND WARRANTIES OF OTHER PARTIES

               (a)  Each of FSA, ACC, ACFS, AMC and AFSFT represents and
warrants that the execution and delivery of this Subordination Agreement has
been duly authorized by all necessary corporate action.

               (b)  Each of FSA, ACC, ACFS, AMC and AFSFT represents and
warrants that this Subordination Agreement has been duly executed and delivered
by each person and constitutes the legal, valid and binding obligation of each
person, enforceable against each person in accordance with its terms.

                                 ARTICLE III.

                                MISCELLANEOUS

          3.1  AMENDMENTS.  (a) No amendment or waiver of any provision of this
Subordination Agreement nor consent to any departure therefrom by any Junior
Lien Holder, Borrower, any Issuer, any Senior Lien Holder or FSA shall in any
event be effective unless the same shall be in writing and signed by the Senior
Lien Holders and FSA, and then such waiver or consent shall be effective only in
the specific instance and for the specific purpose for which given.  No failure
on the part of the Senior Lien

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Holders or FSA to exercise, and no delay in exercising, any right hereunder
shall operate as a waiver thereof; nor shall any single or partial exercise
of any right hereunder preclude any other or further exercise thereof or the
exercise of any other right.  No notice to or demand on Borrower, any Issuer
or Junior Lien Holder in any case shall entitle Borrower, any Issuer or any
Junior Lien Holder to any other or further notice or demand in similar or
other circumstances.  The remedies herein provided are cumulative and not
exclusive of any remedies provided by law.

               (b)  Each Junior Lien Holder and each of ACC, ACFS, AFSFT, and
AMC hereby acknowledges and agrees that FSA may direct each of the Owner
Trustees or the Underlying Trustees to enter into amendments in accordance
with the terms of the relevant Underlying Transaction Documents, but without
the Junior Lien Holders' consent, to make changes to the Underlying
Transaction Documents that FSA believes in good faith are necessary,
appropriate, or incidental to engaging and retaining a satisfactory successor
servicer in the event of a servicer succession under the terms of the
Underlying Transaction Documents, including, without limitation, any
amendment entered into in accordance with the terms of the relevant
Underlying Transaction Documents that make changes to (a) the duties or
standard of care of the servicer or (b) the compensation paid to the servicer
even if the change in compensation paid to the servicer reduces or eliminates
the amount that would otherwise be released from the Spread Account or the
RCCA to Junior Lien Holders or to any other person.

               (c)  The parties hereto contemplate that FSA will issue
additional Policies in connection with future Transactions and that such
Transactions will be made subject to the Spread Account Agreement and the
RCCA Agreement by amendments thereto.  In connection with each such
Transaction, the parties hereto shall execute an amendment to the
Subordination Agreement substantially in the form of amendment attached as
Exhibit I hereto.

               (d)  Notwithstanding the provisions of this Section 3.1, (i)
LaSalle's execution of any amendment will not be required only if any such
amendment does not materially adversely affect the interest of LaSalle acting
solely in its capacity as Trust Collateral Agent (as defined in the
Underlying Transaction Documents), Collateral Agent, Trustee or Backup
Servicer (as defined in the Underlying Transaction Documents), (ii) Harris
Trust's execution of any amendment will not be required only if any such
amendment does not materially adversely affect the interest of Harris Trust
acting solely in its capacity as Trust Collateral Agent, Collateral Agent,
Trustee or Backup Servicer, (iii) Bank One's execution of any amendment will
not be required only if any such amendment does not materially adversely
affect the interest of Bank One acting solely in its capacity as Trust
Collateral Agent, Collateral Agent, Trustee or Backup Servicer.

          3.2  INDEMNIFICATION OF FSA AND SENIOR LIEN HOLDERS. Each of ACC,
ACFS and ACM hereby acknowledges and agrees that it shall upon demand,
indemnify, protect, save, defend and hold harmless FSA and each Senior Lien
Holder, as the case

                                        11

<PAGE>

may be, from and against any and all obligations, fees, liabilities, losses,
damages, penalties, claims, demands, actions, suits, judgments, costs and
expenses, including reasonable legal expenses and attorneys fees, of every
kind and nature whatsoever (collectively, "INDEMNIFIABLE EXPENSES"), imposed
on, incurred by, or asserted against FSA or any Senior Lien Holder by any
Person in connection with any (i) Revived Claim and (ii) payments made by FSA
in connection with preference payments made to Noteholders and
Certificateholders, pursuant to any Policy (as defined in the RCCA Agreement).

          3.3  ADDITIONAL WAIVERS.  (a) Each Junior Lien Holder, each Issuer
and Borrower each hereby waives promptness, diligence, notice of acceptance
and any other notice with respect to any of the Senior Secured Obligations
and this Subordination Agreement and any requirement that the Senior Lien
Holders protect, secure, perfect or insure any security interest or lien or
any property subject thereto or exhaust any right or take any action against
Borrower, any Issuer or any other person or entity or the Borrower Collateral.

               (b)  Each Junior Lien Holder hereby acknowledges and agrees
that, notwithstanding anything contained in the Credit Agreement or any other
Transaction Document to the contrary, neither the Borrower, nor any Issuer
nor any Underlying Trustee shall have any obligation or liability to such
Junior Lien Holder and no such obligation or liability shall become due or
payable under the Credit Agreement at any time before the Final Insurance
Termination Date if the effect of such obligation or liability would be to
cause the Borrower or any Issuer to not be Solvent.  Subject to the terms
hereof, any amount that is prevented by operation of this restriction from
becoming due and payable may, at the option of the Junior Lien Holders,
become an arrearage that becomes due and payable no earlier than the first to
occur of the date upon which Borrower can satisfy such obligation or
liability in full in cash and remain Solvent and the day following the Final
Insurance Termination Date.

          3.4  SURVIVAL.  All covenants, agreements, representations and
warranties made herein shall survive the execution and delivery of the
Transaction Documents and the making of the Borrowings.

          3.5  NO WAIVER BY SENIOR LIEN HOLDERS OR FSA.  No failure or delay
on the part of the Senior Lien Holders, FSA or the Underlying Trustees in the
exercise of any power, right or privilege under this Subordination Agreement
or any of the other Underlying Transaction Documents shall impair such power,
right or privilege or be construed to be a waiver of any default or
acquiescence therein, nor shall any single or partial exercise of any such
power, right or privilege preclude other or further exercise thereof or of
any other right, power or privilege.

          3.6  SEVERABILITY.  Whenever possible, each provision of this
Subordination Agreement, the Transaction Documents and the Underlying
Transaction Documents shall be interpreted in such manner as to be valid,
legal and enforceable under

                                        12

<PAGE>

the applicable law of any jurisdiction.  Without limiting the generality of
the foregoing sentence, in case any provision of this Subordination
Agreement, the Transaction Documents or the Underlying Transaction Documents
shall be invalid, illegal or unenforceable under the applicable law of any
jurisdiction, the validity, legality and enforceability of the remaining
provisions, or of such provision in any other jurisdiction, shall not in any
way be affected or impaired thereby.

          3.7  IN FURTHERANCE OF SUBORDINATION.  Notwithstanding the
prohibition against the initiation, commencement or maintenance of any
Proceeding with respect to Borrower or any Issuer, if any such Proceeding
with respect to Borrower or any Issuer is nevertheless pending and not
dismissed,

               (a)  The Senior Lien Holders and FSA are hereby irrevocably
authorized and empowered (in their own names or in the name of any Junior
Lien Holder or otherwise), but shall have no obligation, to demand, sue for,
collect and receive every payment or distribution referred to in Sections
1.2(a) through 1.2(d), inclusive, and give acquittance therefor and, in the
event  any Junior Lien Holder has failed to file a claim or proof of claim
prior to the 30th day preceding any bar date or other date fixed as the last
day for the filing of such claims or proofs of claim, to file claims and
proofs of claim and take such other action.  Each Junior Lien Holder hereby
irrevocably appoints the Senior Lien Holders and FSA, as such Junior Lien
Holder's attorney-in-fact, with full power in the place and stead of such
Junior Lien Holder and in the name of such Junior Lien Holder, the Senior
Lien Holders or FSA, or otherwise, from time to time, in the Senior Lien
Holders' or FSA's discretion to take any action, execute any instrument or
other document in connection with any Proceeding or enforce any security
interest or other lien on the Borrower Collateral securing payment to Junior
Lien Holder.  Each Senior Lien Holder or FSA shall give the Administrative
Agent prior written notice of its use of such power of attorney in each
action of enforcement of any security interest or other lien on the Borrower
Collateral securing payment to Junior Lien Holder, PROVIDED that the failure
to deliver any such notice shall not affect the validity of such use of such
power of attorney;

               (b)  Each Junior Lien Holder shall duly and promptly take such
action (other than any action to commence or maintain a Proceeding) as any
Senior Lien Holders or FSA may reasonably request to collect and receive any
and all payments or distributions which may be payable or deliverable in a
proceeding or with respect to the Borrower Collateral; and

               (c)  Notwithstanding any other provision hereof, each Junior
Lien Holder hereby agrees that any credit extended by the Senior Lien Holders
or FSA to Borrower or any Issuer or any refinancing arrangement of the
Original Underlying Transactions consented to by FSA and the Senior Lien
Holders (whether or not in connection with such Proceeding) shall be entitled
to all the priorities, preferences and benefits of this Subordination
Agreement, provided that Subsequent Reinsurance (as

                                        13

<PAGE>

defined in the RCCA Agreement) shall not constitute any such credit or
refinancing agreement.

          3.8  ENTIRE AGREEMENT; CONSTRUCTION; AMENDMENTS AND WAIVERS.

               (a)  This Subordination Agreement, the RCCA Agreement, the
Transaction Documents and the Underlying Transaction Documents constitute and
contain the entire agreement among the parties and supersede any and all
prior agreements, negotiations, correspondence, understandings and
communications between the parties, whether written or oral, respecting the
subject matter hereof.

               (b)  This Subordination Agreement is the result of
negotiations between and has been reviewed by each of the parties and their
respective counsel; accordingly, this Subordination Agreement shall be deemed
to be the product of the parties hereto, and no ambiguity shall be construed
in favor of or against any party.  The parties agree that they intend the
literal words of this Subordination Agreement and that no parol evidence
shall be necessary or appropriate to establish any party's actual intentions.

               (c)  The right of  each Junior Lien Holder to exercise any
remedies under the Credit Agreement or any other Transaction Document is
subject to the terms of this Subordination Agreement.  Notwithstanding
anything in the Credit Agreement or in any other Transaction Document, until
the Final Insurance Termination Date, all rights and remedies of each Junior
Lien Holder under the Credit Agreement, any other Transaction Document or
otherwise, whether at law or in equity, is subject to this Subordination
Agreement.  In the event of any contradiction or ambiguity between any
Transaction Document and this Subordination Agreement, the terms of this
Subordination Agreement shall govern. All disputes with respect to the
matters addressed in this Subordination Agreement shall be determined by
reference to this Subordination Agreement exclusively and no provision of the
Credit Agreement or any other Transaction Document should be interpreted as
altering, amending, explaining or clarifying any provision of this
Subordination Agreement.

          3.9  NOTICES.  Any notice or other communication required or
permitted to be given hereunder shall be in writing addressed to the
respective party as set forth below and may be personally served, telecopied
or sent by overnight courier or U.S. Mail and shall be deemed given:  (a) if
served in person, when served; (b) if telecopied, on the date of transmission
if before 3:00 p.m. (Eastern time) on a business day; PROVIDED that a hard
copy of such notice is also sent pursuant to (c) or (d) below; (c) if by
overnight courier, on the first business day after delivery to the courier;
or (d) if by U.S. Mail, certified or registered mail, return receipt
requested on the fourth (4th) day after deposit in the mail postage prepaid.

Notices to Junior
Lien Holders:                           Credit Suisse First Boston, New York
                                        Branch

                                        14

<PAGE>

                                        Eleven Madison Avenue
                                        New York, NY 10010
                                        Attn: Asset Finance
                                              Frank Byrne
                                        Telephone: (212) 325-3003
                                        Facsimile: (212) 325-6677

                                        Bankers Trust Company
                                        Four Albany Street
                                        New York, NY 10006
                                        Attn: Corporate Trust and Agency
                                        Services - Structure Finance.

                                        Greenwich Funding Corporation
                                        c/o Credit Suisse First Boston, New York
                                        Branch
                                        Eleven Madison Avenue
                                        New York, NY 10010
                                        Attn: Asset Finance

With copies to:                         Sullivan & Worcester LLP
                                        One Post Office Square
                                        Boston, MA 02109
                                        Attn: Duncan T. O'Brien

                                        Notice to Owner Trustee
                                        Bankers Trust (Delaware), a Delaware
                                        banking corporation
                                        E. A. Delle Donne Corporate Center
                                        Montgomery Building
                                        1011 Center Road
                                        Wilmington, Delaware 19805-1266

Notices to Issuers:                     c/o AmeriCredit Corp.
                                        801 Cherry Street, Suite 3900
                                        Fort Worth, Texas 76102

Notices to Borrower:                    AFS Funding Corp.
                                        639 Isbell Road, Suite 392
                                        Reno, Nevada 89509

Notice to AFSFT                         AFS Funding Trust
                                        c/o Owner Trustee

Notices to ACC, as agent for
ACFS and ACM:                           AmeriCredit Corp.
                                        801 Cherry Street, Suite 3900
                                        Fort Worth, Texas 76102

Notices to Senior
Lien Holder:                            Harris Trust and Savings Bank
                                        311 West Monroe Street, 12th Floor

                                        15

<PAGE>

                                        Chicago, Illinois 60606
                                        Attn: Indenture Trust Administration
                                        Telephone No.: (312) 461-6030
                                        Telecopy No.: (312) 461-3525

                                        LaSalle Bank National Association
                                        135 S. LaSalle Street
                                        Suite 1625
                                        Chicago, Illinois 60603
                                        Attn: Asset-Backed
                                              Trust Services Group
                                        Administration

                                        Bank One, N.A.
                                        100 East Broad Street, 8th Floor
                                        Columbus, Ohio 43215
                                        Attn: John Rothrock
                                        Telephone No.: (614) 248-5683
                                        Facsimile No.:  (614) 248-5195

Notices to FSA:                         Financial Security Assurance, Inc.
                                        350 Park Avenue
                                        New York, New York  10022-6022
                                        Attn: Transaction Oversight
                                        Telephone No.:  (212) 826-0100
                                        Facsimile No.:  (212) 339-3518

With a copy to:                         Paul, Hastings, Janofsky & Walker LLP
                                        555 South Flower, 23rd Floor
                                        Los Angeles, California 90071
                                        Attn:  Hydee R. Feldstein
                                        Telephone No.:  (213) 683-6249
                                        Facsimile No.:  (213) 627-0705

          3.10 CONTINUING AGREEMENT; TRANSFER OF NOTES.  This Subordination
Agreement is a continuing agreement and shall (a) remain in full force and
effect until the Senior Secured Obligations shall have fully satisfied or
paid, (b) be binding upon each Junior Lien Holder, each Issuer and Borrower
and each of their respective successors and assigns, and (c) inure to the
benefit of and be enforceable by Senior Lien Holders and FSA and each of
their respective successors, transferees and assigns.  Without limiting the
generality of the foregoing clause (c), to the extent Senior Lien Holders or
FSA assigns or otherwise transfers its rights or obligations under any
Underlying Transaction Document to any other person or entity, such other
person or entity shall thereupon become vested with all the rights in respect
thereof granted to Senior Lien Holders or FSA, as applicable, under this
Subordination Agreement, the RCCA Agreement or any Transaction Document.
This Subordination Agreement shall terminate upon the Final Insurance
Termination Date except with respect to Revived Claims and Sections 1.4,
1.12, 3.2 and 3.11.

                                        16

<PAGE>

          3.11 CONSENT TO JURISDICTION.  EACH OF THE PARTIES HERETO HEREBY
CONSENTS AND AGREES THAT THE STATE OR FEDERAL COURTS LOCATED IN THE BOROUGH
OF MANHATTAN, CITY OF NEW YORK SHALL HAVE EXCLUSIVE JURISDICTION TO HEAR AND
DETERMINE ANY CLAIMS OR DISPUTES BETWEEN SUCH PARTIES PERTAINING TO THIS
SUBORDINATION AGREEMENT OR TO ANY DISPUTE BETWEEN FSA, SENIOR LIEN HOLDERS OR
THE NOTEHOLDERS OR CERTIFICATEHOLDERS, ON THE ONE HAND, AND LENDER COLLATERAL
AGENT, JUNIOR LIEN HOLDERS, OR CSFB, ON THE OTHER, UNDER ANY OF THE
TRANSACTION DOCUMENTS OR TO ANY MATTER ARISING OUT OF OR RELATING TO THIS
SUBORDINATION AGREEMENT PROVIDED, THAT SUCH PARTY ACKNOWLEDGES THAT ANY
APPEALS FROM THOSE COURTS MAY HAVE TO BE HEARD BY A COURT LOCATED OUTSIDE OF
THE BOROUGH OF MANHATTAN, CITY OF NEW YORK AND, PROVIDED, FURTHER NOTHING IN
THIS SUBORDINATION AGREEMENT SHALL BE DEEMED OR OPERATE TO PRECLUDE FSA OR
THE SENIOR LIEN HOLDERS FROM BRINGING SUIT OR TAKING OTHER LEGAL ACTION IN
ANY OTHER JURISDICTION TO REALIZE ON ITS COLLATERAL, OR TO ENFORCE A JUDGMENT
OR OTHER COURT ORDER IN FAVOR OF FSA OR THE SENIOR LIEN HOLDERS.  EACH OF THE
PARTIES HERETO EXPRESSLY SUBMITS AND CONSENTS IN ADVANCE TO SUCH JURISDICTION
IN ANY ACTION OR SUIT COMMENCED IN ANY SUCH COURT, AND SUCH PARTY HEREBY
WAIVES ANY OBJECTION WHICH IT MAY HAVE BASED UPON LACK OF PERSONAL
JURISDICTION, IMPROPER VENUE OR FORUM NON CONVENIENS AND HEREBY CONSENTS TO
THE GRANTING OF SUCH LEGAL OR EQUITABLE RELIEF AS IS DEEMED APPROPRIATE BY
SUCH COURT.  BORROWER, EACH ISSUER AND EACH JUNIOR LIEN HOLDER EACH WAIVES
PERSONAL SERVICE OF ANY AND ALL PROCESS UPON IT, AND CONSENTS THAT ALL
SERVICE OF PROCESS BE MADE IN THE MANNER SET FORTH FOR NOTICE IN SECTION 3.9
OF THIS SUBORDINATION AGREEMENT.  EACH OF THE PARTIES HERETO WAIVES ANY RIGHT
TO A TRIAL BY JURY IN ANY ACTION TO ENFORCE OR DEFEND ANY MATTER ARISING FROM
OR RELATED TO THIS SUBORDINATION AGREEMENT.

          3.12 GOVERNING LAW.  This Subordination Agreement shall be governed
by, and construed in accordance with, the internal laws of the State of New
York applicable to contracts made and performed in that state.

          3.13 PAYMENT OF COUNSEL FEES AND EXPENSES.  ACFS agrees to pay upon
demand, the reasonable fees and expenses of Paul, Hastings, Janofsky &
Walker, LLP, special counsel to FSA, in connection with the negotiation,
preparation, approval, execution and delivery of this Subordination Agreement
and the other related Transaction

                                        17

<PAGE>

Documents. If any party hereto commences any action or proceeding against
another party hereto to interpret or enforce this Subordination Agreement the
prevailing party in such action or proceeding shall be entitled to recover
from the other party the actual attorney's fees, costs and expenses incurred
by such prevailing party in connection therewith and in connection with
enforcing any judgment or order thereby obtained.

          3.14 NO DUTIES IMPOSED ON SENIOR LIEN HOLDERS.  The rights granted
to the Senior Lien Holders, FSA, the Underlying Trustee, the Noteholders and
the Certificateholders hereunder are solely for their protection and nothing
herein contained shall impose on any of them any duties with respect to the
Borrower Collateral or any property of Borrower, any Issuer or any Junior
Lien Holder. None of the Senior Lien Holders and FSA shall have any duty to
preserve rights against third parties with respect to any instrument or
chattel paper received hereunder.

          3.15 SPECIFIC PERFORMANCE.  The Senior Lien Holders and FSA are
hereby authorized to demand specific performance of this Subordination
Agreement, whether or not Borrower, any Issuer or any Junior Lien Holder
shall have complied with any of the provisions hereof applicable to it, at
any time when Borrower, any Issuer or any Junior Lien Holder shall have
failed to comply with any of the provisions of this Subordination Agreement
applicable to it. Borrower, each Issuer and each Junior Lien Holder each
hereby irrevocably waives any defense based on the adequacy of a remedy at
law, which might be asserted as a bar to such remedy of specific performance.

          3.16 AUTHORITY OF TRUSTEES.  AFS Funding and FSA by their execution
of this Subordination Agreement and the Instruction Letters, hereby direct
Bankers Trust (Delaware), not in its individual capacity but solely as Owner
Trustee of the respective owner trusts, and Harris Trust, LaSalle, and the
Collateral Agent, to acknowledge, agree to, execute and deliver this
Subordination Agreement on behalf of each such party.

          3.17 LIMITATION OF LIABILITY.  It is expressly understood and
agreed by the parties hereto that (a) this Subordination Agreement is
executed and delivered by each of Bankers Trust (Delaware), not individually
or personally, but solely as Owner Trustee of the respective Trusts, in the
exercise of the powers and authority conferred and vested in each under each
respective Trust Agreement, (b) each of the representations, undertakings and
agreements herein made on the part of the Borrower and the Issuers is made
and intended not as personal representations, undertakings and agreements by
Bankers Trust (Delaware) but is made and intended for the purpose of binding
only the Borrower and the Issuers, respectively, (c) nothing herein contained
shall be construed as creating any liability on Bankers Trust (Delaware),
individually or personally, to perform any covenant either expressed or
implied contained herein, all such liability, if any, being expressly waived
by the parties hereto and by any Person claiming by, through or under the
parties hereto, (d) under no circumstances shall Bankers Trust (Delaware) be
personally liable for the payment of any indebtedness or expenses of Borrower
or the Issuers or be liable for the breach or failure of any obligation,
representation, warranty or covenant made or undertaken by the Borrower or
Issuers under this Subordination

                                        18

<PAGE>

Agreement or any other related documents, and (e) each of the
representations, undertakings and agreements herein made on the part of the
Borrower or Issuers is made and intended not as representations, undertakings
and agreements by Bankers Trust (Delaware), in their respective capacity as
Owner Trustee or individually, but rather is made and intended for the
purpose for binding only the Borrower or Issuers respectively.

          3.18 COUNTERPARTS.  This Subordination Agreement may be executed in
any number of counterparts, all of which shall together constitute but one
agreement.

          3.19 CONCERNING THE LENDER COLLATERAL AGENT.  The Lender Collateral
Agent shall be afforded all of the rights, protections, immunities and
indemnities afforded to it under Section 8.26 of the Credit Agreement and
Section 12 of the Security Agreement as if the same were specifically set
forth herein.  Each of the undersigned Junior Lien Holders (other than the
Lender Collateral Agent) hereby authorizes and directs the Lender Collateral
Agent to execute and deliver this Subordination Agreement.

          3.20 ADDITIONAL TRANSACTIONS. The parties hereto agree that
additional Underlying Transactions shall become subject to this Subordination
Agreement by the execution of an amendment in accordance with Section 3.1(c)
above and substantially in the form of exhibit I hereto.

          3.21 DISCLAIMER OF FIDUCIARY DUTY.  Collateral Agent expressly
disclaims any, and each Junior Lien Holder and the Lender Collateral Agent
each expressly agrees and acknowledges that Collateral Agent shall have no
fiduciary duty to any Junior Lien Holder or Lender Collateral Agent with
respect to Collateral Agent's duties as Collateral Agent with respect to the
Borrower Collateral.  Each Junior Lien Holder acknowledges and agrees that
(i) Collateral Agent is acting as agent for the Lender Collateral Agent for
the limited purpose of perfection by possession of the Lender Collateral
Agent's security interest in certain of the Borrower Collateral and (ii) the
Collateral Agent's fiduciary duties only run to the Senior Lien Holders and
FSA on behalf of whom Collateral Agent acts.  No Junior Lien Holder shall
have any ability or power to direct Collateral Agent in any manner
whatsoever, except as set forth in Section 8.15 of the RCCA Agreement and
Section 8.12 of the Certificate Pledge Agreement, provided that upon the
termination of the liens of the Collateral Agent for the benefit of FSA, the
Collateral Agent shall act upon the written instruction of the Lender
Collateral Agent and shall deliver the Borrower Collateral in accordance with
the written instructions of the Lender Collateral Agent.  Each Junior Lien
Holder and Lender Collateral Agent irrevocably instructs Collateral Agent to
follow only the directions of FSA without regard to the interests of any
Junior Lien Holder and upon the instruction of FSA, Collateral Agent may
foreclose on its collateral, including without limitation the Borrower
Collateral.  Following the completion of the foreclosure, Collateral Agent
shall be released of all obligations in favor of the Junior Lien Holders,
other than the obligation to turn over possession of the remaining Borrower
Collateral, if any, in accordance with the written instructions of the Lender
Collateral Agent. In the event that Collateral Agent has not foreclosed upon
the Borrower Collateral, then upon the Final Insurance

                                        19

<PAGE>

Termination Date, Collateral Agent's sole obligation shall be to turn over
possession of the Borrower Collateral, if any, in accordance with the written
instructions of the Lender Collateral Agent.

          3.22 COMMERCIAL REASONABLENESS.  Each of the parties hereto (other
than Harris Trust, LaSalle, or, in its capacity as "Collateral Agent" under
the Spread Account Agreement, Bank One, N.A.) expressly agrees that the
rights of the Collateral Agent and FSA as set forth in Article VII of the
RCCA Agreement and in Article 5 of the Certificate Pledge Agreement are
commercially reasonable methods of disposition of the Borrower Collateral
under the UCC, given the nature of the Borrower Collateral and the
circumstances of the transactions contemplated by the Transaction Documents
and the Underlying Transaction Documents.

          3.23 EFFECTIVE DATE  This Subordination Agreement is effective as
to all parties, other than AFSFT, as of October 14, 1999 and with respect to
AFSFT, this Subordination Agreement is effective as of October 19, 1999.

                     [SIGNATURES CONTINUE ON THE FOLLOWING PAGE.]

                                        20
<PAGE>

          IN WITNESS WHEREOF, each Junior Lien Holder, Borrower, ACC, ACFS, ACM,
each Issuer, each Senior Lien Holder and FSA has caused this Subordination
Agreement to be duly executed and delivered by its officer thereunto duly
authorized as of the date first above written.

                              JUNIOR LIEN HOLDERS

                                   CREDIT SUISSE FIRST BOSTON, NEW YORK BRANCH

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

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

                                   BANKERS TRUST COMPANY, not in its individual
                                   capacity, but solely as Lender Collateral
                                   Agent

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

                                   GREENWICH FUNDING CORPORATION
                                   By Credit Suisse First Boston, New York
                                   Branch,
                                        As Attorney in fact

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

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

                                      21
<PAGE>

                                   BORROWER

                                   AFS FUNDING CORP.

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

                                      22
<PAGE>

                                   ISSUERS

                                   AmeriCredit 1996-C
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1996-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-C Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                      23
<PAGE>

                                   AmeriCredit 1997-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-C Trust,
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                      24
<PAGE>

                                   AmeriCredit 1999-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1999-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1999-C Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                      25
<PAGE>

                              ACC

                                   AMERICREDIT CORP.

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

                              ACFS

                                   AMERICREDIT FINANCIAL SERVICES, INC.

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

                              ACM

                                   AMERICREDIT MANAGEMENT COMPANY

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

                                      26
<PAGE>

                              SENIOR LIEN HOLDERS

                                   HARRIS TRUST AND SAVINGS BANK,
                                   as Trustee, Trust Collateral Agent and
                                   Collateral Agent for the AmeriCredit 1997-D
                                   Trust, the AmeriCredit 1998-A Trust

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

                                   LASALLE BANK NATIONAL ASSOCIATION, as
                                   Trustee, Trust Collateral Agent and
                                   Collateral Agent for the AmeriCredit 1996-C
                                   Trust, the AmeriCredit 1996-D Trust, the
                                   AmeriCredit 1997-A Trust, the AmeriCredit
                                   1997-B Trust, the AmeriCredit 1997-C Trust

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

                                   BANK ONE, N.A., as Trustee,
                                   Trust Collateral Agent and Collateral Agent
                                   for the AmeriCredit 1998-B Trust, the
                                   AmeriCredit 1998-C Trust, the AmeriCredit
                                   1998-D Trust, the AmeriCredit 1999-A Trust,
                                   the AmeriCredit 1999-B Trust, the AmeriCredit
                                   1999-C Trust

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

                                      27
<PAGE>

                              FSA

                                   FINANCIAL SECURITY ASSURANCE, INC.

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

                                      28
<PAGE>

                                                                   APPENDIX A

                              SCHEDULE OF DEFINITIONS

     Capitalized terms used in this Subordination Agreement shall have the
following meanings:

     "ACC" has the meaning set forth in the Preamble.

     "ACFS" has the meaning set forth in the Preamble.

     "AFFILIATE" means, with respect to any Person, any Person directly or
indirectly controlling, controlled by or under common control with such former
Person.  As used in this definition of "Affiliate," the term "control" means the
possession, directly or indirectly, of the power to direct or cause the
direction of the management and policies of a Person, whether through ownership
of voting securities, by contract or otherwise.

     "AFSFT" has the meaning set forth in the Preamble.

     "AMC" has the meaning set forth in the Preamble.

     "ASSIGNEE" has the meaning set forth in Section 1.5 of this Subordination
Agreement.

     "BANK ONE" means Bank One, NA, a national banking association and its
successors.

     "BORROWER" has the meaning set forth in the Preamble.

     "BORROWER COLLATERAL" means all of the property and interests described in
Section 3(a), 3(b), 3(d), 3(e), 3(f), and 3(g) of the Security Agreement.

     "BORROWING" A borrowing consisting of simultaneous Advances made by Lenders
pursuant to the same Notice of Borrowing as described in Section 2.02 of the
Credit Agreement, subject to Conversion or Continuation pursuant to Section 2.08
of the Credit Agreement.

     "BORROWINGS" Collectively, each Borrowing including each Designated Series
Borrowing.

     "CERTIFICATE PLEDGE AGREEMENT" shall mean that certain Certificate Pledge
and Collateral Agency Agreement dated as of October 19, 1999 among Borrower,
AFSFT, FSA, and Bank One.

     "CERTIFICATEHOLDERS" has the meaning set forth in the Recitals.

     "COLLATERAL AGENT" has the meaning set forth in the Recitals of the RCCA
Agreement; as used herein "Collateral Agent" shall not include any of the Senior
Lien Holders in their capacities as "Collateral Agents" under the Spread Account
Agreement.

                                      1
<PAGE>

     "CONTROLLING PARTY" has the meaning set forth in the Recitals.

     "CREDIT AGREEMENT" has the meaning set forth in the Recitals.

     "CSFB" has the meaning set forth in the Preamble.

     "FINAL INSURANCE TERMINATION DATE" means the last to occur of the Insurance
Termination Dates.

     "FSA" has the meaning set forth in the Preamble.

     "INSTRUCTION LETTERS" means the letters of instruction from the Borrower
and AFSFT to the Underlying Trustees directing the Underlying Trustees to pay
monies released from the Spread Accounts to the Lender Collateral Agent.

     "INSURANCE TERMINATION DATE" means, in the singular, the termination date
of the 1996-C Insurance and Indemnity Agreement, the 1996-D Insurance and
Indemnity agreement, the 1997-A Insurance and Indemnity Agreement, the 1997-B
Insurance and Indemnity Agreement, the 1997-C Insurance and Indemnity Agreement,
the 1997-D Insurance and Indemnity Agreement, the 1998-A Insurance and Indemnity
Agreement, the 1998-B Insurance and Indemnity Agreement, the 1998-C Insurance
and Indemnity Agreement, 1998-D Insurance and Indemnity Agreement, the 1999-A
Insurance and Indemnity Agreement, the 1999-B Insurance and Indemnity Agreement,
, the 1999-C Insurance and Indemnity Agreement, or any Insurance and Indemnity
Agreement or similar document which may hereafter be executed or in connection
with the issuance of any Policy with respect to a transaction or transactions
made subject to this Subordination Agreement.

     "INSURER OBLIGATIONS" has the meaning set forth in the Recitals.

     "ISSUERS" has the meaning set forth in the Preamble.

     "JUNIOR LIEN" has the meaning set forth in the Recitals.

     "JUNIOR LIEN HOLDERS" has the meaning set forth in the Preamble.

     "JUNIOR LOAN" has the meaning set forth in the Recitals.

     "NOTEHOLDERS" has the meaning set forth in the Recitals.

     "ORIGINAL UNDERLYING TRANSACTIONS" means when used in the singular, any of,
and when used in the plural, all of, the transactions contemplated by the
AmeriCredit 1996-C Trust, the AmeriCredit 1996-D Trust, the AmeriCredit 1997-A
Trust, the AmeriCredit 1997-B Trust, the AmeriCredit 1997-C Trust, the
AmeriCredit 1997-D Trust, the AmeriCredit 1998-A Trust, the AmeriCredit 1998-B
Trust, the AmeriCredit 1998-C Trust, the AmeriCredit 1998-D Trust, the
AmeriCredit 1999-A Trust, the AmeriCredit 1999-B Trust, the AmeriCredit 1999-C
Trust and any other Series that may from time to time become either part of or
subject to this Subordination Agreement by executing an amendment in accordance
with Section 3.1 above and substantially in the form of exhibit I hereto.

                                      2

<PAGE>

     "OWNER TRUSTEE" means Bankers Trust Company, a Delaware banking
Corporation acting not in its individual capacity, but solely in its
fiduciary capacity as trustee under that certain Trust Agreement, dated as of
October 19, 1999, by and among Borrower, AFSFT, and Bankers Trust (Delaware)
(the "Trust Agreement"), and any banking corporation that shall have become
its successor under Section 7.04 of the Trust Agreement.

     "PERMITTED TRANSFEREE" At any time, a bank, insurance company,
reinsurance company or commercial paper conduit having, in the case of an
entity that is subject to risk-based capital adequacy requirements, risk
based capital of at least $100,000,000 or, in the case of an entity that is
not subject to risk-based capital adequacy requirements, combined capital and
surplus of at least $100,000,000.

     "PERSON" means any individual, corporation, partnership, joint venture,
association, limited liability company, joint stock company, trust (including
any beneficiary thereof) or any other entity, unincorporated organization or
government or any agency or political subdivision thereof.

     "POLICY" means any Financial Guaranty Insurance Policy issued by FSA
with respect to a Series of Notes for which the Seller has established an
RCCA under the RCCA Agreement.

     "PROCEEDING" has the meaning set forth in Section 1.3 of this
Subordination Agreement.

     "RCCA" has the meaning set forth in the Recitals of the RCCA Agreement.

     "RCCA ACCOUNT COLLATERAL" has the meaning set forth in Section 1 of the
Security Agreement.

     "RCCA AGREEMENT" means the Replacement Cash Collateral Account
Agreement, dated as of the date hereof, among the Borrower, FSA, the
Administrative Agent and the Collateral Agent, as the same may be amended,
supplemented or otherwise modified from time to time.

     "REVIVED CLAIMS" has the meaning set forth in Section 1.11 of this
Subordination Agreement.

     "SECURITY AGREEMENT" has the meaning set forth in the Recitals.

     "SENIOR SECURED OBLIGATIONS" has the meaning set forth in Section 1.2 of
this Subordination Agreement.

     "SOLVENT" means, as to any Person at any time, that (a) the fair value
of the Property of such Person is greater than the amount of such Person's
liabilities (including disputed, contingent and unliquidated liabilities) as
such value is established and liabilities evaluated for purposes of Section
101(3) of the Bankruptcy Code; (b) the present fair saleable value of the
Property of such Person in an orderly liquidation of such Person is not less
than the amount that will be required to pay the probable liability of such
Person on its debts as they become absolute and matured; (c) such Person is
able to

                                        3

<PAGE>

realize upon its Property and pay its debts and other liabilities (including
disputed, contingent and unliquidated liabilities) as they mature in the
normal course of business; (d) such Person does not intend to, and does not
believe that it will, incur debts or liabilities beyond such Person's ability
to pay as such debts and liabilities mature; and (e) such Person is not
engaged in business or a transaction, and is not about to engage in business
or a transaction, for which such Person's Property would constitute
unreasonably small capital.

     "SPREAD ACCOUNT AGREEMENT" means that certain Spread Account Agreement,
dated as of December 1, 1994, as amended and restated as of May 11, 1998,
among the Borrower, FSA, LaSalle, Harris Trust and Collateral Agent, as
amended, restated, modified or supplemented from time to time.

     "TRANSACTION DOCUMENTS" means the Credit Agreement, the Lender Notes (as
defined in the Credit Agreement), the Letters of Instruction, the Security
Agreement, this Subordination Agreement and all other notes, security
agreements, instruments, documents and other agreements (including UCC
financing statements) heretofore, now or hereafter executed and/or delivered
by or on behalf of the Borrower, any Issuer, guarantor or Co-obligor in
connection with any of the foregoing, in each case, as the same may be
amended, supplemented or otherwise modified.

     "UCC" means the Uniform Commercial Code as in effect in each relevant
jurisdiction.

     "UNDERLYING TRANSACTIONS" when used in the singular, any of, and when
used in the plural, all of, the transactions contemplated by the Original
Underlying Transactions and each of the 1996-C Insurance and Indemnity
Agreement, the 1996-D Insurance and Indemnity agreement, the 1997-A Insurance
and Indemnity Agreement, the 1997-B Insurance and Indemnity Agreement, the
1997-C Insurance and Indemnity Agreement, the 1997-D Insurance and Indemnity
Agreement, the 1998-A Insurance and Indemnity Agreement, the 1998-B Insurance
and Indemnity Agreement, the 1998-C Insurance and Indemnity Agreement, 1998-D
Insurance and Indemnity Agreement, the 1999-A Insurance and Indemnity
Agreement, the 1999-B Insurance and Indemnity Agreement, , the 1999-C
Insurance and Indemnity Agreement, the 1996-C Sale and Servicing Agreement,
the 1996-D Sale and Servicing Agreement, the 1997-A Sale and Servicing
Agreement, the 1997-B Sale and Servicing Agreement, the 1997-C Sale and
Servicing Agreement, the 1997-D Sale and Servicing Agreement, the 1998-A Sale
and Servicing Agreement, the 1998-B Sale and Servicing Agreement, the 1998-C
Sale and Servicing Agreement, the 1998-D Sale and Servicing Agreement, the
1999-A Sale and Servicing Agreement, the 1999-B Sale and Servicing Agreement,
the 1999-C Sale and Servicing Agreement, and each other insurance and
indemnity agreement and each other sale and servicing agreement entered into
in connection with a spread account which is or becomes subject to the Spread
Account Agreement and all other transactions that may from time to time
become subject to this Subordination Agreement by an amendment executed in
accordance with Section 3.1 above and substantially in the form of Exhibit I
hereto.

     "UNDERLYING TRANSACTION DOCUMENTS" mean the agreements, contracts,
documents, amendments, consents, instruments, certificates and other papers
executed in connection with each Underlying Transaction.

                                        4

<PAGE>

     "UNDERLYING TRUST" means, in the singular any of, and in the plural, all
of, the Original Underlying Transactions, and any other trust that may from
time to time become party to this Subordination Agreement by executing an
amendment in accordance with Section 3.1 above and substantially in the form
of Exhibit I hereto.

     "UNDERLYING TRUSTEES" means, in the singular, either of Harris Trust,
LaSalle or Collateral Agent, and in the plural, all of them, and their
respective successors and assigns, if any, in their capacities as trustees,
trust collateral agents or collateral agents, in the Underlying Transactions
and any other trustee designated with respect to any of the Underlying
Transactions.

                                        5

<PAGE>

                                                                     APPENDIX B

                            SCHEDULE OF LENDER'S INTERESTS

                                        1

<PAGE>

                                     EXHIBIT I

                                FORM OF AMENDMENT TO
                     SUBORDINATION AND INTERCREDITOR AGREEMENT

                    This FIRST AMENDMENT TO SUBORDINATION AND INTERCREDITOR
AGREEMENT, dated as of October __, 1999 (" First Amendment"), is hereby
entered into by and among [(a) AFS Funding Corp., a Nevada Corporation
("BORROWER"); (b) AFS Funding Trust, a Delaware Business Trust ("AFSFT"); (c)
the AmeriCredit 1996-C Trust, the AmeriCredit 1996-D Trust, the AmeriCredit
1997-A Trust, the AmeriCredit 1997-B Trust, the AmeriCredit 1997-C Trust, the
AmeriCredit 1997-D Trust, the AmeriCredit 1998-A Trust, the AmeriCredit
1998-B Trust, the AmeriCredit 1998-C Trust, the AmeriCredit 1998-D Trust, the
AmeriCredit 1999-A Trust, the AmeriCredit 1999-B Trust, the AmeriCredit
1999-C Trust (collectively, the "ISSUERS"); (d) AmeriCredit Financial
Services, Inc., a Delaware corporation ("ACFS"), (e) AmeriCredit Management
Company, a Delaware corporation ("AMC"), (f) AmeriCredit Corp., a Texas
corporation ("ACC"); (g) Bankers Trust Company, a New York banking
Corporation, not in its individual capacity, but solely in its capacity as
Lender Collateral Agent under the Security Agreement (as defined below) (the
"LENDER COLLATERAL AGENT"), (h) Bankers Trust (Delaware), a Delaware banking
corporation ("BANKERS TRUST (DELAWARE)"), not in its individual capacity, but
solely in its capacity as Owner Trustee; (i) Credit Suisse First Boston, a
Swiss banking corporation acting through its New York branch ("CSFB"), in its
capacity as Administrative Agent under the Credit Agreement (defined below),
(j) those Lenders from time to time party to the Credit Agreement (defined
below)(the "Lenders" and collectively with the Lender Collateral Agent and
CSFB, the "JUNIOR LIEN HOLDERS"); (k) Financial Security Assurance Inc., a
New York stock insurance company ("FSA"), (l) Harris Trust and Savings Bank,
an Illinois banking corporation ("Harris Trust"), LaSalle Bank National
Association formerly known as LaSalle National Bank ("LaSalle"), and Bank One
N.A., (each in its capacity as "Collateral Agent" under that certain Spread
Account Agreement dated as of December 1, 1994, (as amended and restated May
11, 1998, and as amended and or restated from time to time thereafter) and
such other entities as may be designated as "Collateral Agent" under the
Underlying Transaction Documents or the Spread Account Agreement, together
with their respective successors or assigns, if any (collectively the "SENIOR
LIEN HOLDERS").  All capitalized terms used but not otherwise defined herein
shall have the respective meanings set forth in Appendix A attached hereto.]

          WHEREAS, FSA issued and will issue insurance policies to the Senior
Lien Holders in such Senior Lien Holders' capacity as the trustee or indenture
trustee, as applicable (in such capacity, the "Trustee") of the Underlying
Trusts, to guarantee certain scheduled payments to holders of notes or
certificates, as applicable (the "Noteholders" or "Certificateholders") issued
by the Issuers (the "Insurer Obligations");

                                        1

<PAGE>

          WHEREAS, Pursuant to that certain Credit Agreement ("Credit
Agreement") dated as of October 14, 1999 among Borrower, ACC, ACFS, AMC, the
Lenders, the Lender Collateral Agent, and CSFB (in its capacity as
Administrative Agent), the Lenders extended certain financial accommodations
to the Borrower of up to $225,000,000;

          WHEREAS, as a condition precedent to the Credit Agreement, FSA
consented to the Junior Lien on the Borrower Collateral solely upon and in
accordance with the terms and conditions set forth in the Subordination and
Intercreditor Agreement, dated as of October 19, 1999 (the "Subordination
Agreement") by and among Borrower, AFSFT, Issuers, ACFS, AMC, ACC, the Lender
Collateral Agent, Bankers Trust (Delaware), CSFB, Junior Lien Holders, FSA,
Senior Lien Holders.

          WHEREAS, the [Borrower] has requested that the Subordination
Agreement be amended as set forth herein;

          NOW, THEREFORE, in consideration of the promises and mutual
covenants herein contained, the parties agree as follows:

SECTION 1.     RELATION TO SUBORDINATION AGREEMENT.

     Section 1.1    RELATION TO SUBORDINATION AGREEMENT.  This First
Amendment is an amendment to and is an integral part of the Subordination
Agreement.

     Section 1.2    DEFINED TERMS.  Unless otherwise amended by the terms of
this First Amendment, terms used in this First Amendment shall the meaning
assigned to them in the Credit Agreement.

SECTION 2.     AMENDMENT TO SUBORDINATION AGREEMENT.

     Section 2.1    AMENDMENT TO SUBORDINATION AGREEMENT.  Effective upon the
execution and delivery of this First Amendment, the Subordination Agreement
shall read as follows:

          (a) The definition of "Issuers" set forth in Preamble to the
          Subordination Agreement shall be and is hereby amended to include
          [insert other transaction series].

          (b) Article II shall be amended as follows:

          "2.1  REPRESENTATIONS AND WARRANTIES OF JUNIOR LIEN HOLDER.

                                        2

<PAGE>

               (a)  Each Junior Lien Holder, other than the Lender Collateral
          Agent, represents and warrants that it is a Lender under the Credit
          Agreement and that, as a Lender, it holds the percentage set forth in
          Appendix B attached hereto of the legal and beneficial interests,
          obligations and liens under the Credit Agreement and other Transaction
          Documents.  Each Junior Lien Holder, other than the Lender Collateral
          Agent, covenants that it will not sell, transfer, syndicate,
          participate, pledge, encumber or otherwise assign, in whole or in
          part, all or any portion of its interests, obligations or liens in or
          under any of the Transaction Documents in accordance with the
          provisions of paragraph 1.5 of the Subordination Agreement.

               (b)  Each of the Junior Lien Holders represents and warrants that
          the execution and delivery of this First Amendment has been duly
          authorized by all necessary corporate action.

               (c)  Each of the Junior Lien Holders represents and warrants that
          this First Amendment has been duly executed and delivered by each
          person and constitutes the legal, valid and binding obligation of each
          person, enforceable against each person in accordance with its terms.

          2.2  REPRESENTATIONS AND WARRANTIES OF LENDER COLLATERAL AGENT

               (a)  Lender Collateral Agent represents and warrants that the
          execution and delivery of this First Amendment has been duly
          authorized by all necessary corporate action.

               (b)  Lender Collateral Agent represents and warrants that this
          First Amendment has been duly executed and delivered by each person
          and constitutes the legal, valid and binding obligation of each
          person, enforceable against each person in accordance with its terms.

               (c)  Lender Collateral Agent is a separate legal entity from
          Bankers Trust (Delaware) and has not authority or ability to direct
          the actions of Bankers Trust (Delaware) as Owner Trustee.

          2.3  REPRESENTATIONS AND WARRANTIES OF OTHER PARTIES

               (a)  Each of FSA, ACC, ACFS, AMC, [insert new Trust] and AFSFT
          represents and warrants that the execution and delivery of this First
          Amendment has been duly authorized by all necessary corporate action.

               (b)  Each of FSA, ACC, ACFS, AMC, [insert new Trust] and AFSFT
          represents and warrants that this First Amendment has been duly

                                        3

<PAGE>

          executed and delivered by each person and constitutes the legal, valid
          and binding obligation of each person, enforceable against each person
          in accordance with its terms."

      Section 2.2   AMENDMENT TO SCHEDULE OF DEFINITIONS. Capitalized terms
used in this First Amendment shall have the following meanings:

          (a) The definition of "Insurance Termination Date" set forth in the
          Schedule of Definitions to the Subordination Agreement shall be and is
          hereby amended to [insert termination date of Insurance and Indemnity
          Agreement].

          (b) The definition of "Original Underlying Transactions" set forth in
          Schedule of Definitions to the Subordination Agreement shall be and is
          hereby amended to include [insert other transaction series].

          (c) The definition of "Underlying Transactions" set forth in Schedule
          of Definitions to the Subordination Agreement shall be and is hereby
          amended to include [insert other transaction series].

          (d) The definition of "Underlying Trust" set forth in Schedule of
          Definitions to the Subordination Agreement shall be and is hereby
          amended to include [insert other transaction series].

          (e) The definition of "Underlying Trustee" set forth in Schedule of
          Definitions to the Subordination Agreement shall be and is hereby
          amended to include [insert other transaction series].

          (f) "Subordination Agreement" means that certain Subordination and
          Intercreditor Agreement, dated as of October 19, 1999, by and among
          Borrower, AFSFT, Issuers, ACFS, AMC, ACC, Bankers Trust, Bankers Trust
          (Delaware), CSFB, Junior Lien Holders, FSA, Senior Lien Holders.

     Section 2.3    AMENDMENT TO SCHEDULE OF LENDERS INTERESTS.  Effective
upon the execution and delivery of this First Amendment, the Subordination
Agreement shall include:

SECTION 3.     CONDITIONS TO EFFECTIVENESS.

     Section 3.1    EFFECTIVENESS.  This First Amendment shall take effect
immediately upon its execution by each party hereto.

                                        4

<PAGE>

SECTION 4.     MISCELLANEOUS.

     Section 4.1    This First Amendment shall be binding upon and shall
inure to the benefit of the parties hereto and their respective successors
and assigns.

     Section 4.2    This First Amendment may be executed in any number of
several counterparts, each of which shall be deemed an original but all of
which together shall constitute one and the same instrument.

     Section 4.3    This First Amendment shall be construed in connection
with and as part of the Subordination Agreement, and except as modified and
expressly amended by this First Amendment, all terms, conditions and
covenants contained in the Subordination Agreement are hereby ratified and
shall remain in full force and effect.

     Section 4.4    THIS SUBORDINATION AGREEMENT SHALL BE GOVERNED BY THE
LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO ITS CONFLICTS OF LAW
RULES.

                              [signature pages follow]

                                        5

<PAGE>

          IN WITNESS WHEREOF, each Junior Lien Holder, Borrower, ACC, ACFS,
ACM, each Issuer, each Senior Lien Holder and FSA has caused this
Subordination Agreement to be duly executed and delivered by its officer
thereunto duly authorized as of the date first above written.

                                JUNIOR LIEN HOLDERS

                                   CREDIT SUISSE FIRST BOSTON, NEW YORK BRANCH

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

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

                                   BANKERS TRUST COMPANY, not in its individual
                                   capacity, but solely as Lender Collateral
                                   Agent

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

                                   GREENWICH FUNDING CORPORATION
                                   By Credit Suisse First Boston, New York
                                   Branch,
                                        As Attorney in fact

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

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

                                        6
<PAGE>

                                   BORROWER

                                   AFS FUNDING CORP.

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

                                      7
<PAGE>

                                   ISSUERS

                                   AmeriCredit 1996-C
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1996-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1997-C Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                      8
<PAGE>

                                   AmeriCredit 1997-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-A Trust
                                   AmeriCredit 1998-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-C Trust,
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1998-D Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                      9
<PAGE>

                                   AmeriCredit 1999-A Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1999-B Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   AmeriCredit 1999-C Trust
                                   By: Bankers Trust (Delaware), solely in its
                                   capacity as Owner Trustee

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

                                   [insert new Trust]
                                   By: [insert Owner Trustee]

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

                                      10
<PAGE>

                              ACC

                                   AMERICREDIT CORP.

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

                              ACFS

                                   AMERICREDIT FINANCIAL SERVICES, INC.

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

                              ACM

                                   AMERICREDIT MANAGEMENT COMPANY

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

                                      11
<PAGE>

                              SENIOR LIEN HOLDERS

                                   HARRIS TRUST AND SAVINGS BANK,
                                   as Trustee, Trust Collateral Agent and
                                   Collateral Agent for the AmeriCredit 1997-D
                                   Trust, the AmeriCredit 1998-A Trust

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

                                   LASALLE BANK N.A., as Trustee
                                   Trust Collateral Agent and Collateral Agent
                                   for the AmeriCredit 1996-C Trust, the
                                   AmeriCredit 1996-D Trust, the AmeriCredit
                                   1997-A Trust, the AmeriCredit 1997-B Trust,
                                   the AmeriCredit 1997-C Trust

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

                                   BANK ONE, N.A. as Trustee,
                                   Trust Collateral Agent and Collateral Agent
                                   for the AmeriCredit 1998-B Trust, the
                                   AmeriCredit 1998-C Trust, the AmeriCredit
                                   1998-D Trust, the AmeriCredit 1999-A Trust,
                                   the AmeriCredit 1999-B Trust, the AmeriCredit
                                   1999-C Trust

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

                                      12
<PAGE>

                              FSA

                                   FINANCIAL SECURITY ASSURANCE, INC.

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

                                      13
<PAGE>

                                   EXHIBIT II

                                  NOTE LEGEND

No Note or Other Instrument shall be sold, assigned or otherwise transferred by
any Noteholder or Certificateholder, respectively, unless there is conspicuously
endorsed on the first page of such Note or Other Instrument a legend reading as
follows:

THIS NOTE AND THE RIGHTS AND OBLIGATIONS EVIDENCED HEREBY ARE SUBORDINATE IN THE
MANNER AND TO THE EXTENT SET FORTH IN THAT CERTAIN SUBORDINATION AND
INTERCREDITOR AGREEMENT, DATED AS OF OCTOBER 19, 1999 (AS IT MAY BE AMENDED FROM
TIME TO TIME, THE "SUBORDINATION AGREEMENT), AMONG THE BORROWER, AMERICREDIT
FINANCIAL SERVICES, INC., AMERICREDIT MANAGEMENT COMPANY, INC., AMERICREDIT
CORP., THE LENDERS, THE ADMINISTRATIVE AGENT, HARRIS TRUST AND SAVINGS, BANK,
LASALLE NATIONAL BANK, BANK ONE N.A., FINANCIAL SECURITY ASSURANCE INC. AND THE
LENDER COLLATERAL AGENT.  EACH HOLDER OF THIS NOTE, BY ITS ACCEPTANCE HEREOF,
SHALL BE BOUND BY THE PROVISIONS OF THE SUBORDINATION AGREEMENT.

                                      1<PAGE>

                                                                 Exhibit 4.1(i)

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

                          NEXTLINK COMMUNICATIONS, INC.

                                       TO

                     UNITED STATES TRUST COMPANY OF NEW YORK
                                     TRUSTEE

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

                                    Indenture

                          Dated as of November 17, 1999

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

                                  $400,000,000

                          10 1/2% SENIOR NOTES DUE 2009

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

<PAGE>

                          NEXTLINK COMMUNICATIONS, INC.

                 Certain Sections of this Indenture relating to
                         Sections 310 through 318 of the
                          Trust Indenture Act of 1939:

<TABLE>
<CAPTION>
Trust Indenture                                                                         Indenture
  Act Section                                                                            Section
---------------                                                                         ----------
<S>                                                                                     <C>
Section 310(a)(1)            .....................................................        609
           (a)(2)            .....................................................        609
           (a)(3)            .....................................................        Not
                                                                                          Applicable
           (a)(4)            .....................................................        Not
                                                                                          Applicable
           (b)               .....................................................        608
                                                                                          610
Section 311(a)               .....................................................        613
           (b)               .....................................................        613
Section 312(a)               .....................................................        701
           (b)               .....................................................        702
           (c)               .....................................................        702
Section 313(a)               .....................................................        703
           (b)               .....................................................        703
           (c)               .....................................................        703
           (d)               .....................................................        703
Section 314(a)               .....................................................        704
                                                                                          1018
           (b)               .....................................................        Not
                                                                                          Applicable
           (c)(1)            .....................................................        102
           (c)(2)            .....................................................        102
           (c)(3)            .....................................................        Not
                                                                                          Applicable
           (d)               .....................................................        Not
                                                                                          Applicable
           (e)               .....................................................        102
Section 315(a)               .....................................................        601
           (b)               .....................................................        602
           (c)               .....................................................        601
           (d)               .....................................................        601
           (e)               .....................................................        514
Section 316(a)(1)(A)         .....................................................        502
                                                                                          512
           (a)(1)(B)         .....................................................        513
</TABLE>

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

   Note: This reconciliation and tie shall not, for any
         purpose, be deemed to be a part of the Indenture.

                                       -i-

<PAGE>

<TABLE>
<CAPTION>
Trust Indenture                                                                         Indenture
  Act Section                                                                            Section
---------------                                                                         ----------
<S>                                                                                     <C>
           (a)(2)            .....................................................        Not
                                                                                          Applicable
           (b)               .....................................................        508

           (c)               .....................................................        104
Section 317(a)(1)            .....................................................        503
           (a)(2)            .....................................................        504
           (b)               .....................................................        1003
Section 318(a)               .....................................................        107
</TABLE>

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

   Note: This reconciliation and tie shall not, for any
         purpose, be deemed to be a part of the Indenture.

                                      -ii-

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
RECITALS OF THE COMPANY................................................................................. 1

                                   ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

SECTION 101.      Definitions........................................................................... 1
                  Acquired Debt......................................................................... 2
                  Act................................................................................... 2
                  Additional Interest................................................................... 2
                  Affiliate............................................................................. 2
                  Agent Member.......................................................................... 3
                  Applicable Procedures................................................................. 3
                  Asset Disposition..................................................................... 3
                  Attributable Value.................................................................... 3
                  Bank Credit Agreement................................................................. 4
                  Board of Directors.................................................................... 4
                  Board Resolution...................................................................... 4
                  Business Day.......................................................................... 4
                  Capital Lease Obligation.............................................................. 4
                  Capital Stock......................................................................... 5
                  Cedel................................................................................. 5
                  Change of Control..................................................................... 5
                  Commission............................................................................ 5
                  Common Equity......................................................................... 5
                  Company............................................................................... 5
                  Company Request....................................................................... 5
                  Company Order......................................................................... 5
                  Consolidated Capital Ratio............................................................ 5
                  Consolidated Cash Flow Available for
                         Fixed Charges.................................................................. 6
                  Consolidated Income Tax Expense....................................................... 6
                  Consolidated Interest Expense......................................................... 6
                  Consolidated Net Income............................................................... 7
                  Consolidated Net Worth................................................................ 7
                  Consolidated Tangible Assets.......................................................... 8
                  Corporate Trust Office................................................................ 8
                  corporation........................................................................... 8
                  Debt.................................................................................. 8
                  Default............................................................................... 9
</TABLE>

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

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

                                      -iii-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
                  Defaulted Interest.................................................................... 9
                  Depositary............................................................................ 9
                  Disqualified Stock.................................................................... 9
                  DTC...................................................................................10
                  Eagle River...........................................................................10
                  Eligible Institution..................................................................10
                  Eligible Receivables..................................................................10
                  Euroclear.............................................................................10
                  Event of Default......................................................................10
                  Exchange Act..........................................................................11
                  Exchange Offer........................................................................11
                  Exchange Registration Statement.......................................................11
                  Exchange Security.....................................................................11
                  Expiration Date.......................................................................11
                  Global Security.......................................................................11
                  Government Securities.................................................................11
                  Guarantee.............................................................................11
                  Holder................................................................................12
                  Incur.................................................................................12
                  Indenture.............................................................................12
                  Interest Payment Date.................................................................12
                  Interest Rate or Currency Protection
                         Agreement......................................................................12
                  Investment............................................................................13
                  Issue Date............................................................................13
                  Joint Venture.........................................................................13
                  Lien..................................................................................13
                  Marketable Securities.................................................................13
                  Maturity..............................................................................14
                  Net Available Proceeds................................................................14
                  Offer to Purchase.....................................................................15
                  Officers' Certificate.................................................................18
                  Opinion of Counsel....................................................................18
                  Original Securities...................................................................18
                  Outstanding...........................................................................18
                  Paying Agent..........................................................................19
                  Permitted Interest Rate or Currency
                         Protection Agreement...........................................................19
                  Permitted Investment..................................................................19
                  Permitted Liens.......................................................................20
                  Person................................................................................20
                  Predecessor Security..................................................................21
                  Preferred Dividends...................................................................21
</TABLE>

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

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

                                      -iv-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
                  Preferred Stock.......................................................................21
                  Purchase Agreement....................................................................21
                  Purchase Date.........................................................................21
                  Purchase Money Debt...................................................................21
                  Purchasers............................................................................22
                  readily marketable cash equivalents...................................................22
                  Receivables...........................................................................22
                  Receivables Sale......................................................................22
                  Redemption Date.......................................................................23
                  Redemption Price......................................................................23
                  Registered Securities.................................................................23
                  Regular Record Date...................................................................23
                  Regulation S..........................................................................23
                  Regulation S Certificate..............................................................23
                  Regulation S Global Security..........................................................23
                  Regulation S Legend...................................................................23
                  Regulation S Securities...............................................................23
                  Related Person........................................................................23
                  Resale Registration Statement.........................................................23
                  Responsible Officer...................................................................23
                  Restricted Global Security............................................................24
                  Restricted Period.....................................................................24
                  Restricted Securities.................................................................24
                  Restricted Securities Certificate.....................................................24
                  Restricted Securities Legend..........................................................24
                  Restricted Subsidiary.................................................................24
                  Rule 144A.............................................................................24
                  Rule 144A Securities..................................................................24
                  Sale and Leaseback Transaction........................................................24
                  SEC Reports...........................................................................25
                  Securities............................................................................25
                  Securities Act........................................................................25
                  Securities Act Legend.................................................................25
                  Security Register.....................................................................25
                  Security Registrar....................................................................25
                  Significant Subsidiary................................................................25
                  Special Record Date...................................................................25
                  Stated Maturity.......................................................................25
                  Step-Down Date........................................................................25
                  Step-Up...............................................................................25
                  Subordinated Debt.....................................................................26
                  Subsidiary............................................................................27
                  Successor Security....................................................................27
</TABLE>

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

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

                                       -v-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
                  Telecommunications Assets.............................................................27
                  Telecommunications Business...........................................................27
                  Trustee...............................................................................27
                  Trust Indenture Act...................................................................28
                  Unrestricted Securities Certificate...................................................28
                  Unrestricted Subsidiary...............................................................28
                  Vendor Financing Facility.............................................................29
                  Vice President........................................................................29
                  Voting Stock..........................................................................29
                  Wholly-Owned Restricted Subsidiary....................................................29
SECTION 102.      Compliance Certificates and Opinions..................................................29
SECTION 103.      Form of Documents Delivered to Trustee................................................30
SECTION 104.      Acts of Holders; Record Dates.........................................................31
SECTION 105.      Notices, Etc., to Trustee and Company.................................................34
SECTION 106.      Notice to Holders; Waiver.............................................................34
SECTION 107.      Application of Trust Indenture Act....................................................35
SECTION 108.      Effect of Headings and Table of Contents..............................................35
SECTION 109.      Successors and Assigns................................................................35
SECTION 110.      Separability Clause...................................................................35
SECTION 111.      Benefits of Indenture.................................................................35
SECTION 112.      Governing Law.........................................................................36
SECTION 113.      Legal Holidays........................................................................36

                                   ARTICLE TWO

                                 Security Forms

SECTION 201.      Forms Generally.......................................................................36
SECTION 202.      Form of Face of Security..............................................................37
SECTION 203.      Form of Reverse of Security...........................................................42
SECTION 204.      Additional Provisions Required in Global
                             Security...................................................................47
SECTION 205.      Form of Trustee's Certificate of
                             Authentication.............................................................47

                                  ARTICLE THREE

                                 The Securities

SECTION 301.      Title and Terms.......................................................................48
SECTION 302.      Denominations.........................................................................50
SECTION 303.      Execution, Authentication, Delivery
                             and Dating.................................................................50
</TABLE>

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

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

                                      -vi-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
SECTION 304.      Temporary Securities..................................................................51
SECTION 305.      Registration, Registration of
                             Transfer and Exchange......................................................52
SECTION 306.      Mutilated, Destroyed, Lost and
                             Stolen Securities..........................................................57
SECTION 307.      Payment of Interest; Interest
                             Rights Preserved...........................................................58
SECTION 308.      Persons Deemed Owners.................................................................60
SECTION 309.      Cancellation..........................................................................60
SECTION 310.      Computation of Interest...............................................................61
SECTION 311.      CUSIP Numbers.........................................................................61

                                  ARTICLE FOUR

                           Satisfaction and Discharge

SECTION 401.      Satisfaction and Discharge of Indenture...............................................61
SECTION 402.      Application of Trust Money............................................................63

                                  ARTICLE FIVE

                                    Remedies

SECTION 501.      Events of Default.....................................................................63
SECTION 502.      Acceleration of Maturity; Rescission
                             and Annulment..............................................................66
SECTION 503.      Collection of Indebtedness and Suits
                             for Enforcement by Trustee.................................................67
SECTION 504.      Trustee May File Proofs of Claim......................................................68
SECTION 505.      Trustee May Enforce Claims Without
                             Possession of Securities...................................................69
SECTION 506.      Application of Money Collected........................................................69
SECTION 507.      Limitation on Suits...................................................................70
SECTION 508.      Unconditional Right of Holders to Receive
                             Principal, Premium and Interest............................................71
SECTION 509.      Restoration of Rights and Remedies....................................................71
SECTION 510.      Rights and Remedies Cumulative........................................................71
SECTION 511.      Delay or Omission Not Waiver..........................................................72
SECTION 512.      Control by Holders....................................................................72
SECTION 513.      Waiver of Past Defaults...............................................................72
SECTION 514.      Undertaking for Costs.................................................................73
SECTION 515.      Waiver of Stay or Extension Laws......................................................73
</TABLE>

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

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

                                      -vii-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>

                                   ARTICLE SIX

                                   The Trustee

SECTION 601.      Certain Duties and Responsibilities...................................................74
SECTION 602.      Notice of Defaults....................................................................74
SECTION 603.      Certain Rights of Trustee.............................................................74
SECTION 604.      Not Responsible for Recitals
                             or Issuance of Securities..................................................76
SECTION 605.      May Hold Securities...................................................................76
SECTION 606.      Money Held in Trust...................................................................77
SECTION 607.      Compensation and Reimbursement........................................................77
SECTION 608.      Disqualification; Conflicting Interests...............................................78
SECTION 609.      Corporate Trustee Required; Eligibility...............................................78
SECTION 610.      Resignation and Removal; Appointment
                             of Successor...............................................................79
SECTION 611.      Acceptance of Appointment by Successor................................................80
SECTION 612.      Merger, Conversion, Consolidation
                             or Succession to Business..................................................81
SECTION 613.      Preferential Collection
                             of Claims Against the Company..............................................81
SECTION 614.      Appointment of Authenticating Agent...................................................81

                                  ARTICLE SEVEN

              Holders' Lists and Reports by Trustee and the Company

SECTION 701.      Company to Furnish Trustee
                             Names and Addresses of Holders.............................................83
SECTION 702.      Preservation of Information;
                             Communications to Holders..................................................84
SECTION 703.      Reports by Trustee....................................................................84
SECTION 704.      Reports by Company....................................................................85
SECTION 705.      Officers' Certificate with Respect
                             to Change in Interest Rates................................................85

                                  ARTICLE EIGHT

                           Merger, Consolidation, Etc.

SECTION 801.      Mergers, Consolidations and Certain
                             Sales of Assets............................................................86
SECTION 802.      Successor Substituted.................................................................87
</TABLE>

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

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

                                     -viii-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
                                  ARTICLE NINE

                             Supplemental Indentures

SECTION 901.      Supplemental Indentures
                             Without Consent of Holders.................................................88
SECTION 902.      Supplemental Indentures
                             with Consent of Holders....................................................89
SECTION 903.      Execution of Supplemental Indentures..................................................90
SECTION 904.      Effect of Supplemental Indentures.....................................................90
SECTION 905.      Conformity with Trust Indenture Act...................................................90
SECTION 906.      Reference in Securities
                             to Supplemental Indentures.................................................90

                                   ARTICLE TEN

                                    Covenants

SECTION 1001.     Payment of Principal, Premium and
                            Interest....................................................................91
SECTION 1002.     Maintenance of Office or Agency.......................................................91
SECTION 1003.     Money for Security Payments to be
                            Held in Trust...............................................................92
SECTION 1004.     Existence.............................................................................94
SECTION 1005.     Maintenance of Properties and Insurance...............................................94
SECTION 1006.     Payment of Taxes and Other Claims.....................................................95
SECTION 1007.     Limitation on Consolidated Debt.......................................................95
SECTION 1008.     Limitation on Debt and Preferred Stock
                            of Restricted Subsidiaries.................................................100
SECTION 1009.     Limitation on Restricted Payments....................................................103
SECTION 1010.     Limitation on Dividend and Other
                            Payment Restrictions Affecting
                            Restricted Subsidiaries....................................................106
SECTION 1011.     Limitation on Liens..................................................................108
SECTION 1012.     Limitation on Sale and Leaseback
                            Transactions...............................................................110
SECTION 1013.     Limitation on Asset Dispositions.....................................................110
SECTION 1014.     Limitation on Issuances and Sales of Capital
                            Stock of Restricted Subsidiaries...........................................113
SECTION 1015.     Transactions with Affiliates
                            and Related Persons........................................................114
SECTION 1016.     Change of Control....................................................................115
</TABLE>

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

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

                                      -ix-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
<S>                                                                                                  <C>
SECTION 1017.     Provision of Financial Information...................................................117
SECTION 1018.     Statement by Officers as to Default..................................................117
SECTION 1019.     Waiver of Certain Covenants..........................................................117
SECTION 1020.     Limitation on Use of Proceeds........................................................118

                                 ARTICLE ELEVEN

                            Redemption of Securities

SECTION 1101.     Right of Redemption..................................................................118
SECTION 1102.     Applicability of Article.............................................................119
SECTION 1103.     Election to Redeem; Notice to Trustee................................................119
SECTION 1104.     Securities to Be Redeemed Pro Rata...................................................120
SECTION 1105.     Notice of Redemption.................................................................120
SECTION 1106.     Deposit of Redemption Price..........................................................121
SECTION 1107.     Securities Payable on Redemption Date................................................122
SECTION 1108.     Securities Redeemed in Part..........................................................122

                                 ARTICLE TWELVE

                       Defeasance and Covenant Defeasance

SECTION 1201.     Company's Option to Effect Defeasance or
                            Covenant Defeasance........................................................123
SECTION 1202.     Defeasance and Discharge.............................................................123
SECTION 1203.     Covenant Defeasance..................................................................124
SECTION 1204.     Conditions to Defeasance or
                            Covenant Defeasance........................................................124
SECTION 1205.     Deposited Money and U.S. Government
                            Obligations to Be Held in Trust;
                            Other Miscellaneous Provisions.............................................127
SECTION 1206.     Reinstatement........................................................................128
SECTION 1207.     Repayment to Company.................................................................128
ANNEX A    -      Form of Regulation S Certificate
ANNEX B    -      Form of Restricted Securities Certificate
ANNEX C    -      Form of Unrestricted Securities Certificate
</TABLE>

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

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

                                       -x-

<PAGE>

                  INDENTURE, dated as of November 17, 1999, between NEXTLINK
Communications, Inc., a corporation organized under the laws of the State of
Delaware (the "Company"), having its principal office at 500 108th Avenue N.E.,
Suite 2200, Bellevue, Washington 98004, and United States Trust Company of New
York, duly organized and existing under the laws of the State of New York, as
Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

                  The Company has duly authorized the creation of an issue of
$400,000,000 aggregate principal amount of its 10 1/2% Senior Notes due 2009
(the "Securities") of substantially the tenor and amount hereinafter set forth,
and to provide therefor the Company has duly authorized the execution and
delivery of this Indenture. The Securities may consist of Original Securities
and/or Exchange Securities, each as defined herein. The Original Securities and
the Exchange Securities shall rank pari passu in right of payment with all
existing and future senior obligations of the Company.

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

                  NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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

                                   ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

SECTION 101.  Definitions.

                  For all purposes of this Indenture, except as otherwise
expressly provided or unless the context otherwise requires:

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

                  (2) all other terms used herein which are defined in the Trust
         Indenture Act, either directly or by

<PAGE>

         reference therein, have the meanings assigned to them therein;

                  (3) all accounting terms not otherwise defined herein have the
         meanings assigned to them in accordance with generally accepted
         accounting principles (whether or not such is indicated herein) and,
         except as otherwise herein expressly provided, the term "generally
         accepted accounting principles" with respect to any computation
         required or permitted hereunder shall mean such accounting principles
         as are generally accepted as consistently applied by the Company at the
         date of such computation; and

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

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

                  "Acquired Debt" means, with respect to any specified Person,
(i) Debt of any other Person existing at the time such Person merges with or
into or consolidates with or becomes a Restricted Subsidiary of such specified
Person and (ii) Debt secured by a Lien encumbering any asset acquired by such
specified Person, which Debt was not Incurred in anticipation of, and was
outstanding prior to, such merger, consolidation or acquisition.

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

                  "Additional Interest" has the meaning set forth in the form of
Security contained in Section 202. Unless the context otherwise requires,
references herein to "interest" on the Securities shall include Additional
Interest.

                  "Affiliate" of any specified Person means any other Person
directly or indirectly controlling or controlled by or under direct or indirect
common control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified 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.

                  "Agent Member" means any member of, or participant in,
the Depository.

                                       -2-

<PAGE>

                  "Applicable Procedures" means, with respect to any transfer or
transaction involving a Global Security or beneficial interest therein, the
rules and procedures of the Depositary for such Security, Euroclear and Cedel,
in each case to the extent applicable to such transaction and as in effect from
time to time.

                  "Asset Disposition" by the Company or any Restricted
Subsidiary means any transfer, conveyance, sale, lease or other disposition
(other than a creation of a Lien) by such Person (including a consolidation or
merger or other sale of any such Restricted Subsidiary with, into or to another
Person in a transaction in which such Restricted Subsidiary ceases to be a
Restricted Subsidiary of the Company, but excluding a disposition by a
Restricted Subsidiary of the Company to the Company or a Restricted Subsidiary
of the Company or by the Company to a Restricted Subsidiary of the Company) of
(i) shares of Capital Stock or other ownership interests of a Restricted
Subsidiary of the Company (including the issuance of Capital Stock by a
Restricted Subsidiary), other than as permitted by the provisions of Section
1008 or pursuant to a transaction in compliance with Section 801, (ii)
substantially all of the assets of the Company or any of its Restricted
Subsidiaries representing a division or line of business (other than as part of
a Permitted Investment) or (iii) other assets or rights of the Company or any of
its Restricted Subsidiaries other than (A) in the ordinary course of business or
(B) that constitutes a Restricted Payment which is permitted by the provisions
of Section 1009; PROVIDED that a transaction described in clauses (i), (ii) and
(iii) shall constitute an Asset Disposition only if the aggregate consideration
for such transfer, conveyance, sale, lease or other disposition is equal to $5
million or more in any 12-month period.

                  "Attributable Value" means, as to any particular lease under
which any Person is at the time liable other than a Capital Lease Obligation,
and at any date as of which the amount thereof is to be determined, the total
net amount of rent required to be paid by such Person under such lease during
the initial term thereof as determined in accordance with generally accepted
accounting principles, discounted from the last date of such initial term to the
date of determination at a rate per annum equal to the discount rate which would
be applicable to a Capital Lease Obligation with like term in accordance with
generally accepted accounting principles. The net amount of rent required to be
paid under any such lease for any such period shall be the aggregate amount of
rent payable by the lessee with respect to such period after excluding amounts
required to be paid on account of insurance, taxes, assessments, utility,
operating and labor costs and similar charges. In the case of any lease which is
terminable by the lessee upon the payment of penalty, such net

                                      -3-

<PAGE>

amount shall also include the lesser of the amount of such penalty (in which
case no rent shall be considered as required to be paid under such lease
subsequent to the first date upon which it may be so terminated) or the rent
which would otherwise be required to be paid if such lease is not so terminated.
"Attributable Value" means, as to a Capital Lease Obligation, the principal
amount thereof.

                  "Bank Credit Agreement" means any one or more credit
agreements (which may include or consist of revolving credits) between the
Company or any Restricted Subsidiary of the Company and one or more banks or
other financial institutions providing financing for the business of the Company
and its Restricted Subsidiaries.

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

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

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

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

                  "Capital Stock" of any Person means any and all shares,
interests, participations or other equivalents (however designated) of corporate
stock or other equity participations, including partnership interests, whether
general or limited, of such Person.

                                                  -4-

<PAGE>

                  "Cedel" means Cedel Bank, S.A. (or any successor
securities clearing agency).

                  "Change of Control" has the meaning specified in
Section 1016.

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

                  "Common Equity" of any Person means Capital Stock of such
Person that is not Disqualified Stock, and a "sale of Common Equity" includes
any sale of Common Equity effected by private sale or public offering.

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

                  "Company Request" or "Company Order" means a written request
or order signed in the name of the Company by (i) the Chief Executive Officer,
the President, an Executive Vice President or a Vice President of the Company,
and (ii) the Treasurer, Assistant Treasurer or Secretary of the Company, and
delivered to the Trustee.

                  "Consolidated Capital Ratio" of any Person as of any date
means the ratio of (i) the aggregate consolidated principal amount of Debt (or
in the case of Debt issued at a discount the accreted amount thereof) of such
Person then outstanding (which amount of Debt shall be reduced by any amount of
cash or cash equivalent collateral securing on a perfected basis and dedicated
for disbursement exclusively to the payment of principal of and interest on such
Debt) to (ii) the aggregate consolidated Capital Stock (other than Disqualified
Stock) and paid in capital (other than in respect of Disqualified Stock) of such
Person as of such date.

                  "Consolidated Cash Flow Available for Fixed Charges" for any
period means the Consolidated Net Income of the Company and its Restricted
Subsidiaries for such period increased by the sum of (i) Consolidated Interest
Expense of the Company and its Restricted Subsidiaries for such period, plus
(ii) Consolidated Income Tax Expense of the Company and its Restricted
Subsidiaries for such period, plus (iii) the consolidated depreciation and
amortization expense included in the income statement of the

                                       -5-

<PAGE>

Company and its Restricted Subsidiaries for such period, plus (iv) any noncash
expense for such period (excluding any noncash charge to the extent that it
requires an accrual of or a reserve for cash disbursements in any future
period), plus (v) any charge related to any premium or penalty paid in
connection with redeeming or retiring any Debt prior to its stated maturity;
PROVIDED, HOWEVER, that there shall be excluded therefrom the Consolidated Cash
Flow Available for Fixed Charges (if positive) of any Restricted Subsidiary of
the Company (calculated separately for such Restricted Subsidiary in the same
manner as provided above for the Company) that is subject to a restriction which
prevents the payment of dividends or the making of distributions to the Company
or another Restricted Subsidiary of the Company to the extent of such
restriction.

                  "Consolidated Income Tax Expense" for any period means the
consolidated provision for income taxes of the Company and its Restricted
Subsidiaries for such period calculated on a consolidated basis in accordance
with generally accepted accounting principles.

                  "Consolidated Interest Expense" means for any period the
consolidated interest expense included in a consolidated income statement
(excluding interest income) of the Company and its Restricted Subsidiaries for
such period calculated on a consolidated basis in accordance with generally
accepted accounting principles, including without limitation or duplication (or,
to the extent not so included, with the addition of), (i) the amortization of
Debt discounts; (ii) any payments or fees with respect to letters of credit,
bankers' acceptances or similar facilities; (iii) fees with respect to interest
rate swap or similar agreements or foreign currency hedge, exchange or similar
agreements; (iv) Preferred Dividends of the Company and its Restricted
Subsidiaries (other than dividends paid in shares of Preferred Stock that is not
Disqualified Stock) declared and paid or payable; (v) accrued Disqualified Stock
dividends of the Company and its Restricted Subsidiaries, whether or not
declared or paid; (vi) interest on Debt guaranteed by the Company and its
Restricted Subsidiaries; and (vii) the portion of any Capital Lease Obligation
paid or accrued during such period that is allocable to interest expense.

                  "Consolidated Net Income" for any period means the
consolidated net income (or loss) of the Company and its Restricted Subsidiaries
for such period determined on a consolidated basis in accordance with generally
accepted accounting principles; PROVIDED that there shall be excluded therefrom
(a) the net income (or loss) of any Person acquired by the Company or a
Restricted Subsidiary of the Company in a pooling-of-interests transaction for
any period prior to the date of such transaction, (b) the net income (or loss)
of any Person

                                       -6-

<PAGE>

that is not a Restricted Subsidiary of the Company except to the extent of the
amount of dividends or other distributions actually paid to the Company or a
Restricted Subsidiary of the Company by such Person during such period, (c)
gains or losses on Asset Dispositions by the Company or its Restricted
Subsidiaries, (d) all extraordinary gains and extraordinary losses, (e) the
cumulative effect of changes in accounting principles, (f) non-cash gains or
losses resulting from fluctuations in currency exchange rates, (g) any non-cash
gain or loss realized on the termination of any employee pension benefit plan
and (h) the tax effect of any of the items described in clauses (a) through (g)
above; PROVIDED, FURTHER, that for purposes of any determination pursuant to the
provisions of Section 1009 there shall further be excluded therefrom the net
income (but not net loss) of any Restricted Subsidiary of the Company that is
subject to a restriction which prevents the payment of dividends or the making
of distributions to the Company or another Restricted Subsidiary of the Company
to the extent of such restriction.

                  "Consolidated Net Worth" of any Person means the consolidated
stockholders' equity of such Person, determined on a consolidated basis in
accordance with generally accepted accounting principles, less amounts
attributable to Disqualified Stock of such Person; PROVIDED that, with respect
to the Company, adjustments following the date of this Indenture to the
accounting books and records of the Company in accordance with Accounting
Principles Board Opinions Nos. 16 and 17 (or successor opinions thereto) or
otherwise resulting from the acquisition of control of the Company by another
Person shall not be given effect to.

                  "Consolidated Tangible Assets" of any Person means the total
amount of assets (less applicable reserves and other properly deductible items)
which under generally accepted accounting principles would be included on a
consolidated balance sheet of such Person and its Restricted Subsidiaries after
deducting therefrom all goodwill, trade names, trademarks, patents, unamortized
debt discount and expense and other like intangibles, which in each case under
generally accepted accounting principles would be included on such consolidated
balance sheet; PROVIDED that, with respect to the Company, adjustments following
the date of this Indenture to the accounting books and records of the Company in
accordance with Accounting Principles Board Opinions Nos. 16 and 17 (or
successor opinions thereto) or otherwise resulting from the acquisition of
control of the Company by another Person shall not be given effect to.

                  "Corporate Trust Office" means the principal office of the
Trustee in the Borough of Manhattan, The City of New York, New York, at which at
any particular time its corporate trust

                                      -7-

<PAGE>

business shall be administered, which at the date hereof is located at 114 West
47th Street, New York, New York 10036.

                  "corporation" means a corporation, association, company,
limited liability company, joint-stock company or business trust.

                  "Debt" means (without duplication), with respect to any
Person, whether recourse is to all or a portion of the assets of such Person and
whether or not contingent, (i) every obligation of such Person for money
borrowed, (ii) every obligation of such Person evidenced by bonds, debentures,
notes or other similar instruments, including any such obligations Incurred in
connection with the acquisition of property, assets or businesses, (iii) every
reimbursement obligation of such Person with respect to letters of credit,
bankers' acceptances or similar facilities issued for the account of such
Person, (iv) every obligation of such Person issued or assumed as the deferred
purchase price of property or services (including securities repurchase
agreements but excluding trade accounts payable or accrued liabilities arising
in the ordinary course of business which are not overdue or which are being
contested in good faith), (v) every Capital Lease Obligation of such Person,
(vi) all Receivables Sales of such Person, together with any obligation of such
Person to pay any discount, interest, fees, indemnities, penalties, recourse,
expenses or other amounts in connection therewith, (vii) all obligations to
redeem Disqualified Stock issued by such Person, (viii) every obligation under
Interest Rate or Currency Protection Agreements of such Person and (ix) every
obligation of the type referred to in clauses (i) through (viii) of another
Person and all dividends of another Person the payment of which, in either case,
such Person has Guaranteed. The "amount" or "principal amount" of Debt at any
time of determination as used herein represented by (a) any Debt issued at a
price that is less than the principal amount at maturity thereof, shall be the
amount of the liability in respect thereof determined in accordance with
generally accepted accounting principles, (b) any Receivables Sale, shall be the
amount of the unrecovered capital or principal investment of the purchaser
(other than the Company or a Wholly-Owned Restricted Subsidiary of the Company)
thereof, excluding amounts representative of yield or interest earned on such
investment, (c) any Disqualified Stock, shall be the maximum fixed redemption or
repurchase price in respect thereof, (d) any Capital Lease Obligation, shall be
determined in accordance with the definition thereof, or (e) any Permitted
Interest Rate or Currency Protection Agreement, shall be zero. In no event shall
Debt include any liability for taxes.

                                       -8-

<PAGE>

                  "Default" means an event that with the passing of time or the
giving of notice or both shall constitute an Event of Default.

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

                  "Depositary" means, with respect to the Securities issuable or
issued in whole or in part in the form of one or more Global Securities, DTC for
so long as it shall be a clearing agency registered under the Exchange Act, or
such successor (which shall be a clearing agency registered under the Exchange
Act) as the Company shall designate from time to time in an Officers'
Certificate delivered to the Trustee.

                  "Disqualified Stock" of any Person means any Capital Stock of
such Person (other than Capital Stock outstanding on the Issue Date) which, by
its terms (or by the terms of any security into which it is convertible or for
which it is exchangeable), or upon the happening of any event, matures or is
mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or
is redeemable at the option of the holder thereof, in whole or in part, on or
prior to the final Stated Maturity of the Securities (or, if earlier, the date
as of which the Securities have been paid in full); PROVIDED, HOWEVER, that any
Preferred Stock which would not constitute Disqualified Stock but for provisions
thereof giving holders thereof the right to require the Company to repurchase or
redeem such Preferred Stock upon the occurrence of an asset sale or a Change of
Control occurring prior to the final Stated Maturity of the Securities shall not
constitute Disqualified Stock if the asset sale or change of control provisions
applicable to such Preferred Stock are no more favorable to the holders of such
Preferred Stock than the provisions applicable to the Securities contained in
Section 1013 or Section 1016 and such Preferred Stock specifically provides that
the Company will not repurchase or redeem any such stock pursuant to such
provisions prior to the Company's repurchase of such Securities as are required
to be repurchased pursuant to Section 1013 or Section 1016.

                  "DTC" means The Depository Trust Company.

                  "Eagle River" means Eagle River Investments, L.L.C., a limited
liability company formed under the laws of the State of Washington.

                  "Eligible Institution" means a commercial banking institution
that has combined capital and surplus of not less than $500 million or its
equivalent in foreign currency, whose debt is rated "A-3" or higher, "A" or
higher or "A" or higher according to Moody's Investors Service, Inc., Standard &
Poor's

                                       -9-

<PAGE>

Ratings Group or Duff & Phelps Credit Rating Co. (or such similar equivalent
rating by at least one "nationally recognized statistical rating organization"
(as defined in Rule 436 under the Securities Act)) respectively, at the time as
of which any investment or rollover therein is made.

                  "Eligible Receivables" means, at any time, Receivables of the
Company and its Restricted Subsidiaries, as evidenced on the most recent
quarterly consolidated balance sheet of the Company as at a date at least 45
days prior to such time arising in the ordinary course of business of the
Company or any Restricted Subsidiary of the Company.

                  "Euroclear" means the Euroclear Clearance System (or
any successor securities clearing agency).

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

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended (or any successor act) and the rules and regulations thereunder.

                  "Exchange Offer" has the meaning set forth in the form
of the Securities contained in Section 202.

                  "Exchange Registration Statement" has the meaning set forth in
the form of the Securities contained in Section 202.

                  "Exchange Security" means any Security issued in exchange for
an Original Security or Original Securities pursuant to the Exchange Offer or
otherwise registered under the Securities Act and any Security with respect to
which the next preceding Predecessor Security of such Security was an Exchange
Security.

                  "Expiration Date" has the meaning set forth in the definition
of "Offer to Purchase" in this Section 101.

                  "Global Security" means a Security in the form prescribed in
Section 204 evidencing all or part of the Securities, issued to the Depositary
or its nominee, and registered in the name of such Depositary or its nominee.

                  "Government Securities" means direct obligations of, or
obligations guaranteed by, the United States of America for the payment of which
obligations or guarantee the full faith and credit of the United States is
pledged and which have a remaining weighted average life to maturity of not more
than 18 months from the date of Investment therein.

                                      -10-

<PAGE>

                  "Guarantee" by any Person means any obligation, contingent or
otherwise, of such Person guaranteeing, or having the economic effect of
guaranteeing, any Debt of any other Person (the "primary obligor") in any
manner, whether directly or indirectly, and including, without limitation, any
obligation of such Person, (i) to purchase or pay (or advance or supply funds
for the purchase or payment of) such Debt or to purchase (or to advance or
supply funds for the purchase of) any security for the payment of such Debt,
(ii) to purchase property, securities or services for the purpose of assuring
the holder of such Debt of the payment of such Debt, or (iii) to maintain
working capital, equity capital or other financial statement condition or
liquidity of the primary obligor so as to enable the primary obligor to pay such
Debt (and "Guaranteed", "Guaranteeing" and "Guarantor" shall have meanings
correlative to the foregoing); PROVIDED, HOWEVER, that the Guarantee by any
Person shall not include endorsements by such Person for collection or deposit,
in either case, in the ordinary course of business; and PROVIDED, FURTHER, that
the incurrence by a Restricted Subsidiary of the Company of a lien permitted
under clause (iv) of the second paragraph of Section 1011 shall not be deemed to
constitute a Guarantee by such Restricted Subsidiary of any Purchase Money Debt
of the Company secured thereby.

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

                  "Incur" means, with respect to any Debt or other obligation of
any Person, to create, issue, incur (by conversion, exchange or otherwise),
assume, Guarantee or otherwise become liable in respect of such Debt or other
obligation including by acquisition of Subsidiaries or the recording, as
required pursuant to generally accepted accounting principles or otherwise, of
any such Debt or other obligation on the balance sheet of such Person (and
"Incurrence", "Incurred", "Incurrable" and "Incurring" shall have meanings
correlative to the foregoing); PROVIDED, HOWEVER, that a change in generally
accepted accounting principles that results in an obligation of such Person that
exists at such time becoming Debt shall not be deemed an Incurrence of such Debt
and that neither the accrual of interest nor the accretion of original issue
discount shall be deemed an Incurrence of Debt; PROVIDED, FURTHER, HOWEVER, that
the Company may elect to treat all or any portion of revolving credit debt of
the Company or a Subsidiary as being incurred from and after any date beginning
the date the revolving credit commitment is extended to the Company or a
Subsidiary, by furnishing notice thereof to the Trustee, and any borrowings or
reborrowings by the Company or a Subsidiary under such commitment up to the
amount of such commitment designated by the Company as Incurred shall not be
deemed to be new Incurrences of Debt by the Company or such Subsidiary.

                                      -11-

<PAGE>

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

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

                  "Interest Rate or Currency Protection Agreement" of any Person
means any forward contract, futures contract, swap, option or other financial
agreement or arrangement (including, without limitation, caps, floors, collars
and similar agreements) relating to, or the value of which is dependent upon,
interest rates or currency exchange rates or indices.

                  "Investment" by any Person means any direct or indirect loan,
advance or other extension of credit or capital contribution (by means of
transfers of cash or other property to others or payments for property or
services for the account or use of others, or otherwise) to, or purchase or
acquisition of Capital Stock, bonds, notes, debentures or other securities or
evidence of Debt issued by, any other Person, including any payment on a
Guarantee of any obligation of such other Person, but excluding any loan,
advance or extension of credit to an employee of the Company or any of its
Restricted Subsidiaries in the ordinary course of business, accounts receivable
and other commercially reasonable extensions of trade credit.

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

                  "Joint Venture" means a corporation, partnership or other
entity engaged in one or more Telecommunications Businesses as to which the
Company (directly or through one or more Restricted Subsidiaries) exercises
managerial control and in which the Company owns (i) a 50% or greater interest,
or (ii) a 30% or greater interest, together with options or other contractual
rights, exercisable not more than seven years after the Company's initial
Investment in such Joint Venture, to increase its interest to not less than 50%.

                  "Lien" means, with respect to any property or assets, any
mortgage or deed of trust, pledge, hypothecation, assignment, Receivables Sale,
deposit arrangement, security interest, lien, charge, easement (other than any
easement not materially impairing usefulness or marketability), encumbrance,
preference, priority or other security agreement or preferential arrangement of
any kind or nature whatsoever on or with respect to such property or assets
(including, without limitation, any conditional sale or other title retention
agreement having substantially the same economic effect as any of the
foregoing).

                                      -12-

<PAGE>

                  "Marketable Securities" means: (i) Government Securities; (ii)
any time deposit account, money market deposit and certificate of deposit
maturing not more than 365 days after the date of acquisition issued by, or time
deposit of, an Eligible Institution; (iii) commercial paper maturing not more
than 365 days after the date of acquisition issued by a corporation (other than
an Affiliate of the Company) with a rating, at the time as of which any
investment therein is made, of "P-1" or higher according to Moody's Investors
Service, Inc., "A-1" or higher according to Standard & Poor's Ratings Group or
"A-1" or higher according to Duff & Phelps Credit Rating Co. (or such similar
equivalent rating by at least one "nationally recognized statistical rating
organization" (as defined in Rule 436 under the Securities Act)); (iv) any
banker's acceptances or money market deposit accounts issued or offered by an
Eligible Institution; (v) repurchase obligations with a term of not more than 7
days for Government Securities entered into with an Eligible Institution; (vi)
auction-rate preferred stocks of any corporation maturing within 90 days after
the date of acquisition by the Company thereof, having a rating of at least AA
by Standard & Poor's; and (vii) any fund investing exclusively in investments of
the types described in clauses (i) through (vi) above.

                  "Maturity", when used with respect to any Security, means the
date on which the principal of such Security becomes due and payable as therein
or herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption or otherwise.

                  "Net Available Proceeds" from any Asset Disposition by any
Person means cash or readily marketable cash equivalents received (including by
way of sale or discounting of a note, installment receivable or other
receivable, but excluding any other consideration received in the form of
assumption by the acquiror of Debt or other obligations relating to such
properties or assets) therefrom by such Person, net of (i) all legal, title and
recording tax expenses, commissions and other fees and expenses Incurred and all
federal, state, provincial, foreign and local taxes (including taxes payable
upon payment or other distribution of funds from a foreign subsidiary to the
Company or another subsidiary of the Company) required to be accrued as a
liability as a consequence of such Asset Disposition, (ii) all payments made by
such Person or its Restricted Subsidiaries on any Debt which is secured by such
assets in accordance with the terms of any Lien upon or with respect to such
assets or which must by the terms of such Lien, or in order to obtain a
necessary consent to such Asset Disposition or by applicable law, be repaid out
of the proceeds from such Asset Disposition, (iii) all distributions and other
payments made to minority interest holders in Restricted Subsidiaries of such
Person or joint

                                      -13-

<PAGE>

ventures as a result of such Asset Disposition, (iv) appropriate amounts to be
provided by such Person or any Restricted Subsidiary thereof, as the case may
be, as a reserve in accordance with generally accepted accounting principles
against any liabilities associated with such assets and retained by such Person
or any Restricted Subsidiary thereof, as the case may be, after such Asset
Disposition, including, without limitation, liabilities under any
indemnification obligations and severance and other employee termination costs
associated with such Asset Disposition, in each case as determined by the Board
of Directors, in its reasonable good faith judgment evidenced by a Board
Resolution filed with the Trustee; PROVIDED, HOWEVER, that any reduction in such
reserve within twelve months following the consummation of such Asset
Disposition will be treated for all purposes of this Indenture and the
Securities as a new Asset Disposition at the time of such reduction with Net
Available Proceeds equal to the amount of such reduction, and (v) any
consideration for an Asset Disposition (which would otherwise constitute Net
Available Proceeds) that is required to be held in escrow pending determination
of whether a purchase price adjustment will be made, but amounts under this
clause (v) shall become Net Available Proceeds at such time and to the extent
such amounts are released to such Person.

                  "Offer to Purchase" means a written offer (the "Offer") sent
by the Company by first class mail, postage prepaid, to each Holder at his
address appearing in the Security Register on the date of the Offer offering to
purchase up to the principal amount of Securities specified in such Offer at the
purchase price specified in such Offer (as determined pursuant to this
Indenture). Unless otherwise required by applicable law, the Offer shall specify
an expiration date (the "Expiration Date") of the Offer to Purchase which shall
be, subject to any contrary requirements of applicable law, not less than 30
days or more than 60 days after the date of such Offer and a settlement date
(the "Purchase Date") for purchase of Securities within five Business Days after
the Expiration Date. The Company shall notify the Trustee at least 15 Business
Days (or such shorter period as is acceptable to the Trustee) prior to the
mailing of the Offer of the Company's obligation to make an Offer to Purchase,
and the Offer shall be mailed by the Company or, at the Company's request, by
the Trustee in the name and at the expense of the Company. The Offer shall
contain information concerning the business of the Company and its Subsidiaries
which the Company in good faith believes will enable such Holders to make an
informed decision with respect to the Offer to Purchase (which at a minimum will
include (i) the most recent annual and quarterly financial statements and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" contained in the documents required to be filed with the Trustee
pursuant to this Indenture (which requirements may be satisfied by delivery of

                                      -14-

<PAGE>

such documents together with the Offer), (ii) a description of material
developments in the Company's business subsequent to the date of the latest of
such financial statements referred to in clause (i) (including a description of
the events requiring the Company to make the Offer to Purchase), (iii) if
applicable, appropriate pro forma financial information concerning the Offer to
Purchase and the events requiring the Company to make the Offer to Purchase and
(iv) any other information required by applicable law to be included therein).
The Offer shall contain all instructions and materials necessary to enable such
Holders to tender Securities pursuant to the Offer to Purchase. The Offer shall
also state:

                  (a) the Section of this Indenture pursuant to which the Offer
         to Purchase is being made;

                  (b) the Expiration Date and the Purchase Date;

                  (c) the aggregate principal amount of the Outstanding
         Securities offered to be purchased by the Company pursuant to the Offer
         to Purchase (including, if less than 100%, the manner by which such has
         been determined pursuant to Section 1013 or 1016) (the "Purchase
         Amount");

                  (d) the purchase price to be paid by the Company for each
         $1,000 aggregate principal amount of Securities accepted for payment
         (as specified pursuant to this Indenture) (the "Purchase Price");

                  (e) that the Holder may tender all or any portion of the
         Securities registered in the name of such Holder and that any portion
         of a Security tendered must be tendered in an integral multiple of
         $1,000 principal amount;

                  (f) the place or places where Securities are to be surrendered
         for tender pursuant to the Offer to Purchase;

                  (g) that interest on any Security not tendered or tendered but
         not purchased by the Company pursuant to the Offer to Purchase will
         continue to accrue;

                  (h) that on the Purchase Date the Purchase Price will become
         due and payable upon each Security being accepted for payment pursuant
         to the Offer to Purchase and that interest thereon shall cease to
         accrue on and after the Purchase Date;

                  (i) that each Holder electing to tender a Security pursuant to
         the Offer to Purchase will be required to surrender such Security at
         the place or places specified in the Offer prior to the close of
         business on the Expiration

                                      -15-

<PAGE>

         Date (such Security being, if the Company or the Trustee so requires,
         duly endorsed by, or accompanied by a written instrument of transfer in
         form satisfactory to the Company and the Trustee duly executed by, the
         Holder thereof or his attorney duly authorized in writing);

                  (j) that Holders will be entitled to withdraw all or any
         portion of Securities tendered if the Company (or its Paying Agent)
         receives, not later than the close of business on the Expiration Date,
         a telegram, telex, facsimile transmission or letter setting forth the
         name of the Holder, the principal amount of the Security the Holder
         tendered, the certificate number of the Security the Holder tendered
         and a statement that such Holder is withdrawing all or a portion of his
         tender;

                  (k) that (a) if Securities in an aggregate principal amount
         less than or equal to the Purchase Amount are duly tendered and not
         withdrawn pursuant to the Offer to Purchase, the Company shall purchase
         all such Securities and (b) if Securities in an aggregate principal
         amount in excess of the Purchase Amount are tendered and not withdrawn
         pursuant to the Offer to Purchase, the Company shall purchase
         Securities having an aggregate principal amount equal to the Purchase
         Amount on a pro rata basis (with such adjustments as may be deemed
         appropriate so that only Securities in denominations of $1,000 or
         integral multiples thereof shall be purchased);

                  (l) that in the case of any Holder whose Security is purchased
         only in part, the Company shall execute, and the Trustee shall
         authenticate and deliver to the Holder of such Security without service
         charge, a new Security or Securities, of any authorized denomination as
         requested by such Holder, in an aggregate principal amount equal to and
         in exchange for the unpurchased portion of the Security so tendered;
         and

                  (m) the CUSIP number or numbers of the Securities offered to
         be purchased by the Company pursuant to the Offer to Purchase.

Any Offer to Purchase shall be governed by and effected in accordance with the
Offer for such Offer to Purchase.

                                      -16-

<PAGE>

                  "Officers' Certificate" means a certificate signed by (i) the
Chief Executive Officer, President, an Executive Vice President or a Vice
President, and (ii) the Treasurer, Assistant Treasurer, Secretary or an
Assistant Secretary, of the Company, and delivered to the Trustee and containing
the statements provided for in Section 102. One of the officers signing an
Officers' Certificate given pursuant to Section 1018 shall be the principal
executive, financial or accounting officer of the Company.

                  "Opinion of Counsel" means a written opinion of legal counsel,
who may be counsel for the Company, and who shall be acceptable to the Trustee,
and containing the statements provided for in Section 102.

                  "Original Securities" means all Securities other than
Exchange Securities.

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

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

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

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

PROVIDED, HOWEVER, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed

                                      -17-

<PAGE>

not to be Outstanding, except that, in determining whether the Trustee shall be
protected in relying upon any such request, demand, authorization, direction,
notice, consent or waiver, only Securities which the Trustee knows to be so
owned shall be so disregarded. Securities so owned which have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Trustee the pledgee's right so to act with respect to such
Securities and that the pledgee is not the Company or any other obligor upon the
Securities or any Affiliate of the Company or of such other obligor.

                  "Paying Agent" means any Person authorized by the Company to
pay the principal of (and premium, if any) or interest on any Securities on
behalf of the Company. The Trustee is hereby authorized by the Company to act as
a "Paying Agent" for the purposes of this Indenture, until such time as the
Company notifies the Trustee in writing that such authorization is revoked.

                  "Permitted Interest Rate or Currency Protection Agreement" of
any Person means any Interest Rate or Currency Protection Agreement entered into
with one or more financial institutions in the ordinary course of business that
is designed to protect such Person against fluctuations in interest rates or
currency exchange rates with respect to Debt Incurred and which shall have a
notional amount no greater than the payments due with respect to the Debt being
hedged thereby and not for purposes of speculation.

                  "Permitted Investment" means (i) any Investment in a Joint
Venture (including the purchase or acquisition of any Capital Stock of a Joint
Venture), provided the aggregate amount of all outstanding Investments pursuant
to this clause (i) in Joint Ventures in which the Company owns, directly or
indirectly, a less than 50% interest shall not exceed $25 million, (ii) any
Investment in any Person as a result of which such Person becomes a Restricted
Subsidiary, or, subject to the proviso to clause (i) of this definition, becomes
a Joint Venture of the Company, (iii) any Investment in Marketable Securities,
(iv) Investments in Permitted Interest Rate or Currency Protection Agreements,
(v) Investments made as a result of the receipt of noncash consideration from an
Asset Disposition that was made pursuant to and in compliance with Section 1013
of this Indenture and (vi) other Investments in an aggregate amount not to
exceed the aggregate net proceeds received by the Company or any Restricted
Subsidiary after the date of this Indenture from the sale or liquidation of any
Unrestricted Subsidiary or any interest therein (except to the extent that any
such amount is included in the calculation of Consolidated Net Income).

                                      -18-

<PAGE>

                  "Permitted Liens" means (a) Liens for taxes, assessments,
governmental charges or claims which are not yet delinquent or which are being
contested in good faith by appropriate proceedings, if a reserve or other
appropriate provision, if any, as shall be required in conformity with generally
accepted accounting principles shall have been made therefor; (b) other Liens
incidental to the conduct of the Company's and its Restricted Subsidiaries'
business or the ownership of its property and assets not securing any Debt, and
which do not in the aggregate materially detract from the value of the Company's
and its Restricted Subsidiaries' property or assets when taken as a whole, or
materially impair the use thereof in the operation of its business; (c) Liens
with respect to assets of a Restricted Subsidiary granted by such Restricted
Subsidiary to the Company to secure Debt owing to the Company; (d) pledges and
deposits made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of statutory obligations
(including to secure government contracts); (e) deposits made to secure the
performance of tenders, bids, leases, and other obligations of like nature
incurred in the ordinary course of business (exclusive of obligations for the
payment of borrowed money); (f) zoning restrictions, servitudes, easements,
rights-of-way, restrictions and other similar charges or encumbrances incurred
in the ordinary course of business which, in the aggregate, do not materially
detract from the value of the property subject thereto or interfere with the
ordinary conduct of the business of the Company or its Restricted Subsidiaries;
(g) Liens arising out of judgments or awards against the Company or any
Restricted Subsidiary with respect to which the Company or such Restricted
Subsidiary is prosecuting an appeal or proceeding for review and the Company or
such Restricted Subsidiary is maintaining adequate reserves in accordance with
generally accepted accounting principles; (h) any interest or title of a lessor
in the property subject to any lease other than a Capital Lease; and (i) any
statutory warehousemen's, materialmen's or other similar Liens for sums not then
due and payable (or which, if due and payable, are being contested in good faith
and with respect to which adequate reserves are being maintained to the extent
required by generally accepted accounting principles).

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

                  "Predecessor Security" of any particular Security means every
previous Security issued before, and evidencing all or a portion of the same
debt as that evidenced by, such particular Security; and, for the purposes of
this definition, any Security

                                      -19-

<PAGE>

authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

                  "Preferred Dividends" for any Person means for any period the
quotient determined by dividing the amount of dividends and distributions paid
or accrued (whether or not declared) on Preferred Stock of such Person during
such period calculated in accordance with generally accepted accounting
principles, by 1 minus the maximum statutory income tax rate then applicable to
the Company (expressed as a decimal).

                  "Preferred Stock" of any Person means Capital Stock of such
Person of any class or classes (however designated) that ranks prior, as to the
payment of dividends or as to the distribution of assets upon any voluntary or
involuntary liquidation, dissolution or winding up of such Person, to shares of
Capital Stock of any other class of such Person.

                  "Purchase Agreement" means the Purchase Agreement, dated as of
November 12, 1999, between the Company and the Purchasers, as such agreement may
be amended from time to time.

                  "Purchase Date" has the meaning set forth in the definition of
"Offer to Purchase" in this Section 101.

                  "Purchase Money Debt" means (i) Acquired Debt Incurred in
connection with the acquisition of Telecommunications Assets and (ii) Debt of
the Company or of any Restricted Subsidiary of the Company (including, without
limitation, Debt represented by Bank Credit Agreements, Capital Lease
Obligations, Vendor Financing Facilities, mortgage financings and purchase money
obligations) Incurred for the purpose of financing all or any part of the cost
of construction, acquisition or improvement by the Company or any Restricted
Subsidiary of the Company or any Joint Venture of any Telecommunications Assets
of the Company, any Restricted Subsidiary of the Company or any Joint Venture,
and including any related notes, Guarantees, collateral documents, instruments
and agreements executed in connection therewith, as the same may be amended,
supplemented, modified or restated from time to time.

                  "Purchasers" means Goldman, Sachs & Co., Salomon Smith Barney
Inc., Credit Suisse First Boston Corporation, TD Securities (USA) Inc., Barclays
Capital Inc., Chase Securities Inc., Banc of America Securities LLC, BancBoston
Robertson Stephens Inc., Deutsche Bank Securities Inc., J.P. Morgan Securities
Inc. and PNC Capital Markets, Inc.

                                      -20-

<PAGE>

                  "readily marketable cash equivalents" means (i) marketable
securities issued or directly and unconditionally guaranteed by the United
States Government or issued by any agency thereof and backed by the full faith
and credit of the United States; (ii) marketable direct obligations issued by
any state of the United States of America or any political subdivision of any
such state or any public instrumentality thereof and, at the time of
acquisition, having the highest rating obtainable from either Standard & Poor's
Rating Group or Moody's Investors Service, Inc.; (iii) commercial paper maturing
no more than 180 days from the date of acquisition thereof and, at the time of
acquisition, having a rating of P-1 according to Moody's Investors Service,
Inc., "A-1" or higher according to Standard & Poor's Ratings Group or "A-1" or
higher according to Duff & Phelps Credit Rating Co. (or such similar equivalent
rating by at least one "nationally recognized statistical rating organization"
(as defined in Rule 436 under the Securities Act)); and (iv) certificates of
deposit or bankers' acceptance maturing within one year from the date of
acquisition thereof issued by any commercial bank organized under the laws of
the United States of America or any state thereof or the District of Columbia
having unimpaired capital and surplus of not less than $100,000,000.

                  "Receivables" means receivables, chattel paper, instruments,
documents or intangibles evidencing or relating to the right to payment of money
in respect of the sale of goods or services.

                  "Receivables Sale" of any Person means any sale of Receivables
of such Person (pursuant to a purchase facility or otherwise), other than in
connection with a disposition of the business operations of such Person relating
thereto or a disposition of defaulted Receivables for purpose of collection and
not as a financing arrangement.

                  "Redemption Date", when used with respect to any Security to
be redeemed, means the date fixed for such redemption by or pursuant to this
Indenture.

                  "Redemption Price", when used with respect to any Security to
be redeemed, means the price at which it is to be redeemed pursuant to this
Indenture.

                  "Registered Securities" means the Exchange Securities and all
other Securities sold or otherwise disposed of pursuant to an effective
registration statement under the Securities Act, together with their respective
Successor Securities.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date means the May 15 or November 15 (whether or

                                      -21-

<PAGE>

not a Business Day), as the case may be, next preceding such Interest Payment
Date.

                  "Regulation S" means Regulation S under the Securities Act (or
any successor provision), as it may be amended from time to time.

                  "Regulation S Certificate" means a certificate
substantially in the form set forth in Annex A.

                  "Regulation S Global Security" has the meaning
specified in Section 201.

                  "Regulation S Legend" means a legend substantially in the form
of the legend required in the form of Security set forth in Section 202 to be
placed upon each Regulation S Security.

                  "Regulation S Securities" means all Securities required
pursuant to Section 305(c) to bear a Regulation S Legend.  Such
term includes the Regulation S Global Security.

                  "Related Person" of any Person means any other Person directly
or indirectly owning (a) 10% or more of the Outstanding Common Equity of such
Person (or, in the case of a Person that is not a corporation, 10% or more of
the equity interest in such Person) or (b) 10% or more of the combined voting
power of the Voting Stock of such Person.

                  "Resale Registration Statement" has the meaning set forth in
the Form of the Securities contained in Section 202.

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

                  "Restricted Global Security" has the meaning specified
in Section 201.

                  "Restricted Period" means the period of 41 consecutive days
beginning on and including the later of (i) the day on which

                                      -22-

<PAGE>

Securities are first offered to persons other than distributors (as defined in
Regulation S) in reliance on Regulation S and (ii) the original issuance date of
the Securities.

                  "Restricted Securities" means all Securities required
pursuant to Section 305(c) to bear any Restricted Securities
Legend.  Such term includes the Restricted Global Security.

                  "Restricted Securities Certificate" means a certificate
substantially in the form set forth in Annex B.

                  "Restricted Securities Legend" means, collectively, the
legends substantially in the forms of the legends required in the form of
Security set forth in Section 202 to be placed upon each Restricted Security.

                  "Restricted Subsidiary" of the Company means any Subsidiary,
whether existing on or after the date of this Indenture, unless such Subsidiary
is an Unrestricted Subsidiary.

                  "Rule 144A" means Rule 144A under the Securities Act (or any
successor provision), as it may be amended from time to time.

                  "Rule 144A Securities" means the Securities purchased by the
Purchasers from the Company pursuant to the Purchase Agreement, other than the
Regulation S Securities.

                  "Sale and Leaseback Transaction" of any Person means an
arrangement with any lender or investor or to which such lender or investor is a
party providing for the leasing by such Person of any property or asset of such
Person which has been or is being sold or transferred by such Person more than
365 days after the acquisition thereof or the completion of construction or
commencement of operation thereof to such lender or investor or to any person to
whom funds have been or are to be advanced by such lender or investor on the
security of such property or asset. The stated maturity of such arrangement
shall be the date of the last payment of rent or any other amount due under such
arrangement prior to the first date on which such arrangement may be terminated
by the lessee without payment of a penalty.

                  "SEC Reports" has the meaning specified in Section 704.

                  "Securities" means the Exchange Securities and the
Original Securities.

                  "Securities Act" means the Securities Act of 1933 and any
statute successor thereto, in each case as amended from time to time.

                                      -23-

<PAGE>

                  "Securities Act Legend" means a Restricted Securities
Legend or a Regulation S Legend.

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

                  "Significant Subsidiary" means a Restricted Subsidiary that is
a "significant subsidiary" as defined in Rule 1-02(w) of Regulation S-X under
the Securities Act and the Exchange Act.

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

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

                  "Step-Down Date" has the meaning set forth in the form
of the Security contained in Section 202.

                  "Step-Up" has the meaning set forth in the form of the
Security contained in Section 202.

                  "Subordinated Debt" means Debt of the Company as to which the
payment of principal of (and premium, if any) and interest and other payment
obligations in respect of such Debt shall be subordinate to the prior payment in
full of the Securities to at least the following extent: (i) no payments of
principal of (or premium, if any) or interest on or otherwise due in respect of
such Debt may be permitted for so long as any default in the payment of
principal (or premium, if any) or interest on the Securities exists; (ii) in the
event that any other default that with the passing of time or the giving of
notice, or both, would constitute an Event of Default exists with respect to the
Securities, upon notice by 25% or more in principal amount of the Securities to
the Trustee, the Trustee shall have the right to give notice to the Company and
the holders of such Debt (or trustees or agents therefor) of a payment blockage,
and thereafter no payments of principal of (or premium, if any) or interest on
or otherwise due in respect of such Debt may be made for a period of 179 days
from the date of such notice or for the period until such default has been cured
or waived or ceased to exist and any acceleration of the Securities has been
rescinded or annulled, whichever period is shorter (which Debt may provide that
(A) no new period of payment blockage may be commenced by a payment blockage
notice unless and until 360 days have elapsed since the effectiveness of the
immediately prior notice, (B) no nonpayment default that existed

                                      -24-

<PAGE>

or was continuing on the date of delivery of any payment blockage notice to such
holders (or such agents or trustees) shall be, or be made, the basis for a
subsequent payment blockage notice and (C) failure of the Company to make
payment on such Debt when due or within any applicable grace period, whether or
not on account of such payment blockage provisions, shall constitute an event of
default thereunder); and (iii) such Debt may not (x) provide for payments of
principal of such Debt at the stated maturity thereof or by way of a sinking
fund applicable thereto or by way of any mandatory redemption, defeasance,
retirement or repurchase thereof by the Company (including any redemption,
retirement or repurchase which is contingent upon events or circumstances, but
excluding any retirement required by virtue of acceleration of such Debt upon an
event of default thereunder), in each case prior to the final Stated Maturity of
the Securities or (y) permit redemption or other retirement (including pursuant
to an offer to purchase made by the Company) of such other Debt at the option of
the holder thereof prior to the final Stated Maturity of the Securities, other
than a redemption or other retirement at the option of the holder of such Debt
(including pursuant to an offer to purchase made by the Company) which is
conditioned upon a change of control of the Company pursuant to provisions
substantially similar to those of Section 1016 (and which shall provide that
such Debt will not be repurchased pursuant to such provisions prior to the
Company's repurchase of the Securities required to be repurchased by the Company
pursuant to the provisions of Section 1016.

                  "Subsidiary" of any Person means (i) a corporation more than
50% of the combined voting power of the outstanding Voting Stock of which is
owned, directly or indirectly, by such Person or by one or more other
Subsidiaries of such Person or by such Person and one or more Subsidiaries
thereof or (ii) any other Person (other than a corporation) in which such
Person, or one or more other Subsidiaries of such Person or such Person and one
or more other Subsidiaries thereof, directly or indirectly, has at least a
majority ownership and power to direct the policies, management and affairs
thereof.

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

                  "Telecommunications Assets" means all assets, rights
(contractual or otherwise) and properties, whether tangible or

                                      -25-

<PAGE>

intangible, used or intended for use in connection with a Telecommunications
Business.

                  "Telecommunications Business" means the business of (i)
transmitting, or providing services relating to the transmission of, voice,
video or data through owned or leased transmission facilities, (ii) creating,
developing or marketing communications related network equipment, software and
other devices for use in a Telecommunication Business or (iii) evaluating,
participating or pursuing any other activity or opportunity that is primarily
related to those identified in (i) or (ii) above and shall, in any event,
include all businesses in which the Company or any of its Subsidiaries are
engaged on the Issue Date; PROVIDED that the determination of what constitutes a
Telecommunications Business shall be made in good faith by the Board of
Directors, which determination shall be conclusive.

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

                  "Trust Indenture Act" means the Trust Indenture Act of 1939 as
in force at the date as of which this instrument was executed; PROVIDED,
HOWEVER, that in the event the Trust Indenture Act of 1939 is amended after such
date, "Trust Indenture Act" means, to the extent required by any such amendment,
the Trust Indenture Act of 1939 as so amended.

                  "Unrestricted Securities Certificate" means a certificate
substantially in the form set forth in Annex C.

                  "Unrestricted Subsidiary" means (1) any Subsidiary of the
Company designated as such by the Board of Directors as set forth below where
(a) neither the Company nor any of its other Subsidiaries (other than another
Unrestricted Subsidiary) (i) provides credit support for, or Guarantee of, any
Debt of such Subsidiary or any Subsidiary of such Subsidiary (including any
undertaking, agreement or instrument evidencing such Debt) or (ii) is directly
or indirectly liable for any Debt of such Subsidiary or any Subsidiary of such
Subsidiary, and (b) no default with respect to any Debt of such Subsidiary or
any Subsidiary of such Subsidiary (including any right which the holders thereof
may have to take enforcement action against such Subsidiary) would permit (upon
notice, lapse of time or both) any holder of any other Debt of the Company and
its Restricted Subsidiaries to declare a default on such other Debt or cause the
payment thereof to be accelerated or payable prior to its final scheduled
maturity and (2) any Subsidiary of an Unrestricted Subsidiary. The Board of
Directors may designate any Subsidiary

                                      -26-

<PAGE>

to be an Unrestricted Subsidiary unless such Subsidiary owns any Capital Stock
of, or owns or holds any Lien on any property of, any other Subsidiary of the
Company which is not a Subsidiary of the Subsidiary to be so designated or
otherwise an Unrestricted Subsidiary, PROVIDED that either (x) the Subsidiary to
be so designated has total assets of $1,000 or less or (y) immediately after
giving effect to such designation, the Company could Incur at least $1.00 of
additional Debt pursuant to the first paragraph of Section 1007 and PROVIDED,
FURTHER, that the Company could make a Restricted Payment in an amount equal to
the greater of the fair market value and the book value of such Subsidiary
pursuant to Section 1009 and such amount is thereafter treated as a Restricted
Payment for the purpose of calculating the aggregate amount available for
Restricted Payments thereunder. The Board of Directors may designate any
Unrestricted Subsidiary to be a Restricted Subsidiary, PROVIDED that if such
Unrestricted Subsidiary has Debt outstanding at such time, either (a)
immediately after giving effect to such designation, the Company could Incur at
least $1.00 of additional Debt pursuant to the first paragraph of Section 1007
or (b) the Company or such Restricted Subsidiary could Incur such Debt hereunder
(other than as Acquired Debt).

                  "Vendor Financing Facility" means any agreements between the
Company or a Restricted Subsidiary of the Company and one or more vendors or
lessors of equipment or other capital assets to the Company or any of its
Restricted Subsidiaries (or any affiliate of any such vendor or lessor)
providing financing for the acquisition by the Company or any such Restricted
Subsidiary of equipment or other capital assets from any such vendor or lessor.

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

                  "Voting Stock" of any Person means Capital Stock of such
Person which ordinarily has voting power for the election of directors (or
persons performing similar functions) of such Person, whether at all times or
only so long as no senior class of securities has such voting power by reason of
any contingency.

                  "Wholly-Owned Restricted Subsidiary" of any Person means a
Restricted Subsidiary of such Person 99% or more of the outstanding Capital
Stock or other ownership interests of which (other than directors' qualifying
shares) shall at the time be owned by such Person or by one or more Wholly-Owned
Restricted Subsidiaries of such Person or by such Person and one or more
Wholly-Owned Restricted Subsidiaries of such Person.

                                      -27-

<PAGE>

SECTION 102.  COMPLIANCE CERTIFICATES AND OPINIONS.

                  Upon any application or request by the Company to the Trustee
to take any action under any provision of this Indenture, the Company shall
furnish to the Trustee such certificates and opinions as may be required under
the Trust Indenture Act and under this Indenture. Each such certificate or
opinion shall be given in the form of an Officers' Certificate, if to be given
by an officer of the Company, or an Opinion of Counsel, if to be given by
counsel, and shall comply with the requirements of the Trust Indenture Act and
any other requirement set forth in this Indenture.

                  Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include

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

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

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

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

SECTION 103.  FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

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

                                      -28-

<PAGE>

                  Any certificate of an officer of the Company may be based,
insofar as it relates to legal matters, upon an opinion of counsel submitted
therewith, unless such officer knows, or in the exercise of reasonable care
should know, that the opinion with respect to the matters upon which his
certificate is based is erroneous. Any opinion of counsel may be based, insofar
as it relates to factual matters, upon a certificate of an officer or officers
of the Company submitted therewith stating the information on which counsel is
relying, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate with respect to such matters is erroneous.

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

SECTION 104.  ACTS OF HOLDERS; RECORD DATES.

                  Any request, demand, authorization, direction, notice,
consent, waiver or other action provided by this Indenture to be given or taken
by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required, to the Company. Such
instrument or instruments (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders signing
such instrument or instruments. Proof of execution of any such instrument or of
a writing appointing any such agent shall be sufficient for any purpose of this
Indenture and (subject to Section 601) conclusive in favor of the Trustee and
the Company, if made in the manner provided in this Section.

                  The fact and date of the execution by any Person of any such
instrument or writing pursuant to this Section 104 may be proved by the
affidavit of a witness of such execution or by a certificate of a notary public
or other officer authorized by law to take acknowledgments of deeds, certifying
that the individual signing such instrument or writing acknowledged to him the
execution thereof. Where such execution is by a signer acting in a capacity
other than his individual capacity, such certificate or affidavit shall also
constitute sufficient proof of his authority. The fact and date of the execution
of any such instrument or writing, or the authority of the Person executing the
same, may also be proved in any other manner which the Trustee deems sufficient.

                                      -29-

<PAGE>

                  The ownership of Securities shall be proved by the Security
Register.

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

                  The Company may set any day as a record date for the purpose
of determining the Holders of Outstanding Securities entitled to give, make or
take any request, demand, authorization, direction, notice, consent, waiver or
other action provided or permitted by this Indenture to be given, made or taken
by Holders of Securities, PROVIDED that the Company may not set a record date
for, and the provisions of this paragraph shall not apply with respect to, the
giving or making of any notice, declaration, request or direction referred to in
the next paragraph. If not set by the Company prior to the first solicitation of
a Holder made by any Person in respect of any such matter referred to in the
foregoing sentence, the record date for any such matter shall be the 30th day
(or, if later, the date of the most recent list of Holders required to be
provided pursuant to Section 701) prior to such first solicitation. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities on such record date, and no other Holders, shall be entitled to take
the relevant action, whether or not such Holders remain Holders after such
record date; PROVIDED that no such action shall be effective hereunder unless
taken on or prior to the applicable Expiration Date by Holders of the requisite
principal amount of Outstanding Securities on such record date. Nothing in this
paragraph shall be construed to prevent the Company from setting a new record
date for any action for which a record date has previously been set pursuant to
this paragraph (whereupon the record date previously set shall automatically and
with no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities on the date such
action is taken. Promptly after any record date is set pursuant to this
paragraph, the Company, at its own expense, shall cause notice of such record
date, the proposed action by Holders and the applicable Expiration Date to be
given to the Trustee in writing and to each Holder of Securities in the manner
set forth in Section 106.

                  The Trustee may set any day as a record date for the purpose
of determining the Holders of Outstanding Securities

                                      -30-
<PAGE>

entitled to join in the giving or making of (i) any Notice of Default, (ii) any
declaration of acceleration referred to in Section 502, (iii) any request to
institute proceedings referred to in Section 507(2) or (iv) any direction
referred to in Section 512. If any record date is set pursuant to this
paragraph, the Holders of Outstanding Securities on such record date, and no
other Holders, shall be entitled to join in such notice, declaration, request or
direction, whether or not such Holders remain Holders after such record date;
PROVIDED that no such action shall be effective hereunder unless taken on or
prior to the applicable Expiration Date by Holders of the requisite principal
amount of Outstanding Securities on such record date. Nothing in this paragraph
shall be construed to prevent the Trustee from setting a new record date for any
action for which a record date has previously been set pursuant to this
paragraph (whereupon the record date previously set shall automatically and with
no action by any Person be cancelled and of no effect), and nothing in this
paragraph shall be construed to render ineffective any action taken by Holders
of the requisite principal amount of Outstanding Securities on the date such
action is taken. Promptly after any record date is set pursuant to this
paragraph, the Trustee, at the Company's expense, shall cause notice of such
record date, the proposed action by Holders and the applicable Expiration Date
to be given to the Company in writing and to each Holder of Securities in the
manner set forth in Section 106.

                  With respect to any record date set pursuant to this Section,
the party hereto which sets such record dates may designate any day as the
"Expiration Date" and from time to time may change the Expiration Date to any
earlier or later day; PROVIDED that no such change shall be effective unless
notice of the proposed new Expiration Date is given to the other party hereto in
writing, and to each Holder of Securities in the manner set forth in Section
106, on or prior to the existing Expiration Date. If an Expiration Date is not
designated with respect to any record date set pursuant to this Section, the
party hereto which set such record date shall be deemed to have initially
designated the 180th day after such record date as the Expiration Date with
respect thereto, subject to its right to change the Expiration Date as provided
in this paragraph. Notwithstanding the foregoing, no Expiration Date shall be
later than the 180th day after the applicable record date.

                  Without limiting the foregoing, a Holder entitled hereunder to
take any action hereunder with regard to any particular Security may do so with
regard to all or any part of the principal amount of such Security or by one or
more duly appointed agents each of which may do so pursuant to such appointment
with regard to all or any part of such principal amount.

                                      -31-
<PAGE>

SECTION 105.  NOTICES, ETC., TO TRUSTEE AND COMPANY.

                  Any request, demand, authorization, direction, notice,
consent, waiver or Act of Holders or other document provided or permitted by
this Indenture to be made upon, given or furnished to, or filed with,

                  (1)  the Trustee by any Holder or by the Company shall
         be sufficient for every purpose hereunder if delivered in
         writing to the Trustee at its Corporate Trust Office,
         Attention: Corporate Trust Administration, or

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

SECTION 106.  NOTICE TO HOLDERS; WAIVER.

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

                  In case by reason of the suspension of regular mail service or
by reason of any other cause it shall be impracticable to give such notice by
mail, then such notification as shall be made with the approval of the Trustee
shall constitute a sufficient notification for every purpose hereunder.

                                      -32-
<PAGE>

SECTION 107.  APPLICATION OF TRUST INDENTURE ACT.

                  The Trust Indenture Act shall apply as a matter of contract to
this Indenture for purposes of interpretation, construction and defining the
rights and obligations hereunder. If any provision hereof limits, qualifies or
conflicts with a provision of the Trust Indenture Act that is required under
such Act to be a part of and govern this Indenture, the latter provision shall
control. If any provision of this Indenture modifies or excludes any provision
of the Trust Indenture Act that may be so modified or excluded, the latter
provision shall be deemed to apply to this Indenture as so modified or to be
excluded, as the case may be.

SECTION 108.  EFFECT OF HEADINGS AND TABLE OF CONTENTS.

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

SECTION 109.  SUCCESSORS AND ASSIGNS.

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

SECTION 110.  SEPARABILITY CLAUSE.

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

SECTION 111.  BENEFITS OF INDENTURE.

                  Nothing in this Indenture or in the Securities, express or
implied, shall give to any Person, other than the parties hereto and their
successors hereunder and the Holders of Securities, any benefit or any legal or
equitable right, remedy or claim under this Indenture.

SECTION 112.  GOVERNING LAW.

                  This Indenture and the Securities shall be governed by and
construed in accordance with the laws of the State of New York.

                                      -33-
<PAGE>

SECTION 113.  LEGAL HOLIDAYS.

                  In any case where any Interest Payment Date, Redemption Date,
Purchase Date or Stated Maturity of any Security shall not be a Business Day,
then (notwithstanding any other provision of this Indenture or of the
Securities) payment of interest or principal (and premium, if any) need not be
made on such date, but may be made on the next succeeding Business Day with the
same force and effect as if made on the Interest Payment Date, Redemption Date,
Purchase Date or at the Stated Maturity, PROVIDED that no interest shall accrue
for the period from and after such Interest Payment Date, Redemption Date,
Purchase Date or Stated Maturity, as the case may be.

                                   ARTICLE TWO

                                 Security Forms

SECTION 201.  FORMS GENERALLY.

                  The Securities and the Trustee's certificates of
authentication thereof shall be in substantially the forms set forth in this
Article, with such appropriate legends, insertions, omissions, substitutions and
other variations as are required or permitted by this Indenture, and may have
such letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange or as may, consistently herewith, be determined by the
officers executing such Securities, as evidenced by their execution of the
Securities.

                  Upon their original issuance, Rule 144A Securities shall be
issued in the form of one or more Global Securities registered in the name of
the Depositary or its nominee and deposited with the Trustee, as custodian for
the Depositary, for credit by the Depositary to the respective accounts of
beneficial owners of the Securities represented thereby (or such other accounts
as they may direct). Such Global Securities, together with their Successor
Securities which are Global Securities other than the Regulation S Global
Security, are collectively herein called the "Restricted Global Security". Upon
their original issuance, Regulation S Securities shall be issued in the form of
one or more Global Securities registered in the name of the Depositary, or its
nominee and deposited with the Trustee, as custodian for the Depositary, for
credit to the respective accounts of the beneficial owners of the Securities
represented thereby (or such other accounts as they may direct), PROVIDED that
upon such deposit all such Securities shall be credited to or through accounts
maintained at the Depositary by or on behalf

                                      -34-
<PAGE>

of Euroclear or Cedel. Such Global Securities, together with their Successor
Securities which are Global Securities other than the Restricted Global
Security, are collectively herein called the "Regulation S Global Security".

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

                  In certain cases described elsewhere herein, the legends set
forth in Section 202 may be omitted from Securities issued hereunder.

SECTION 202.  FORM OF FACE OF SECURITY.

                  [If the Security is a Global Security, insert the
legends required by Section 204 of the Indenture]

                  [If Restricted Securities, then insert -- THIS NOTE HAS NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"). THE HOLDER HEREOF, BY PURCHASING THIS NOTE, AGREES FOR THE BENEFIT OF THE
COMPANY THAT THIS NOTE MAY NOT BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED (X)
PRIOR TO THE SECOND ANNIVERSARY OF THE ISSUANCE HEREOF (OR ANY PREDECESSOR
SECURITY HERETO) OR (Y) BY ANY HOLDER THAT WAS AN AFFILIATE OF THE COMPANY AT
ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH TRANSFER, IN EITHER
CASE, OTHER THAN (1) TO THE COMPANY, (2) SO LONG AS THIS NOTE IS ELIGIBLE FOR
RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT ("RULE 144A"), TO A PERSON
WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER WITHIN
THE MEANING OF RULE 144A, PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A
QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT RESALE, PLEDGE OR
OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (3) IN AN OFFSHORE
TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT, (4)
PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY
RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT, OR (5) PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH CASE IN
ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
STATES. THE HOLDER HEREOF, BY PURCHASING THIS NOTE REPRESENTS AND AGREES FOR THE
BENEFIT OF THE COMPANY THAT IT IS (1) A QUALIFIED INSTITUTIONAL BUYER WITHIN THE
MEANING OF RULE 144A OR

                                      -35-
<PAGE>

(2) A NON-U.S. PERSON OUTSIDE THE UNITED STATES WITHIN THE MEANING OF (OR AN
ACCOUNT SATISFYING THE REQUIREMENTS OF PARAGRAPH (O)(2) OF RULE 902 UNDER)
REGULATION S UNDER THE SECURITIES ACT.]

                  [If a Regulation S Security, then insert -- THIS SECURITY HAS
NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933 (THE "SECURITIES ACT")
AND MAY NOT BE OFFERED, SOLD OR DELIVERED IN THE UNITED STATES OR TO, OR FOR THE
ACCOUNT OR BENEFIT OF, ANY U.S. PERSON, UNLESS THIS SECURITY IS REGISTERED UNDER
THE SECURITIES ACT OR AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS THEREOF IS
AVAILABLE.]

                          NEXTLINK Communications, Inc.

                          10 1/2% SENIOR NOTES DUE 2009

[IF RESTRICTED GLOBAL SECURITY - CUSIP NO.   ]
[IF ANY REGULATION S SECURITY - CUSIP NO.    ]
[IF REGULATION S GLOBAL SECURITY - ISIN NO.  ]

No. ______                                                       $____________

                  NEXTLINK Communications, Inc., a corporation organized under
the laws of the State of Delaware (herein called the "Company", which term
includes any successor Person under the Indenture hereinafter referred to), for
value received, hereby promises to pay to_____________, or registered assigns,
the principal sum of _____________ Dollars [if this Security is a Global
Security, then insert: (which principal amount may from time to time be
increased or decreased to such other principal amounts (which, taken together
with the principal amounts of all other Outstanding Securities, shall not exceed
$400,000,000 in the aggregate at any time) by adjustments made on the records of
the Trustee hereinafter referred to in accordance with the Indenture)] on
December 1, 2009, and to pay interest thereon from November 17, 1999 or from the
most recent Interest Payment Date to which interest has been paid or duly
provided for, semi-annually on June 1 and December 1 in each year, commencing
June 1, 2000 at the rate of 10 1/2% per annum, until the principal hereof is
paid or made available for payment. [If Original Securities, then insert:
PROVIDED, HOWEVER, that if (i) the Company has not filed a registration
statement (the "Exchange Registration Statement") under the Securities Act of
1933, as amended (the "Securities Act"), registering a security substantially
identical to this Security (except that such Security will not contain terms
with respect to the Additional Interest payments described below or transfer
restrictions)

                                      -36-
<PAGE>

pursuant to an exchange offer (the "Exchange Offer") (or, in lieu thereof, a
registration statement registering this Security for resale (a "Resale
Registration Statement")) by February 15, 2000, or (ii) the Exchange
Registration Statement relating to the Exchange Offer or, if applicable, the
Resale Registration Statement has not become or been declared effective by March
16, 2000, or (iii) the Exchange Offer has not been completed within 45 days
after the date on which the Exchange Registration Statement has become or been
declared effective initially (if the Exchange Offer is then required to be made
pursuant to the Exchange and Registration Rights Agreement (the "Exchange and
Registration Rights Agreement"), dated as of November 17, 1999, by and between
the Company, the Purchasers (as defined therein) and the Holders from time to
time of the Securities) or (iv) either the Exchange Registration Statement or,
if applicable, the Resale Registration Statement is filed and declared effective
(except as specifically permitted therein) but shall thereafter cease to be
effective without being succeeded promptly by an additional registration
statement filed and declared effective, in each case (i) through (iv) upon the
terms and conditions set forth in the Exchange and Registration Rights Agreement
(each such event referred to in clauses (i) through (iv), a "Registration
Default"), then interest will accrue (in addition to any stated interest on the
Securities) (the "Step-Up") at a rate of 0.5% per annum, determined daily, on
the principal amount of the Securities, for the period from the occurrence of
the Registration Default until such time (the "Step-Down Date") as no
Registration Default is in effect and, PROVIDED, FURTHER, that if either the
Exchange Offer has not been consummated or, if applicable, the Resale
Registration Statement has not become or been declared effective, in each case
by April 30, 2000, then the per annum rate of such Additional Interest shall
increase (the "Subsequent Step-Up") by an additional 0.25% per annum for each
subsequent 90-day period (provided that the Step-Up and all Subsequent Step-Up
interest rates shall not exceed 1.0% per annum in the aggregate) and Additional
Interest will be payable at such increased rate until such time (the "Subsequent
Step Down Date") as the Company consummates the Exchange Offer or, if
applicable, the Resale Registration Statement becomes or has been declared
effective (after which such interest rate will be restored to its initial rate).
Interest accruing as a result of the Step-Up or the Subsequent Step-Up (which
shall be computed on the basis of a 365-day year) is referred to herein as
"Additional Interest." Accrued Additional Interest, if any, shall be paid
semi-annually on June 1 and December 1, in each year; and the amount of accrued
Additional Interest shall be determined on the basis of the number of days
actually elapsed. Any accrued and unpaid interest (including Additional
Interest) on this Security upon the issuance of an Exchange Security (as
defined in the Indenture) in exchange for this Security shall cease to be
payable to the Holder hereof but such accrued and unpaid interest (including

                                      -37-
<PAGE>

Additional Interest) shall be payable on the next Interest Payment Date for such
Exchange Security to the Holder thereof on the related Regular Record Date.] The
interest so payable, and punctually paid or duly provided for, on any Interest
Payment Date will, as provided in such Indenture, be paid to the Person in whose
name this Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest, which shall be
May 15 or November 15 (whether or not a Business Day), as the case may be, next
preceding such Interest Payment Date. Any such interest not so punctually paid
or duly provided for will forthwith cease to be payable to the Holder on such
Regular Record Date and may either be paid to the Person in whose name this
Security (or one or more Predecessor Securities) is registered at the close of
business on a Special Record Date for the payment of such Defaulted Interest to
be fixed by the Trustee, notice whereof shall be given to Holders of Securities
not less than 10 days prior to such Special Record Date, or be paid at any time
in any other lawful manner not inconsistent with the requirements of any
securities exchange on which the Securities may be listed, and upon such notice
as may be required by such exchange, all as more fully provided in said
Indenture.

                  In the case of a default in payment of principal and premium,
if any, upon acceleration or redemption, interest shall be payable pursuant to
the preceding paragraph on such overdue principal (and premium, if any), such
interest shall be payable on demand and, if not so paid on demand, such interest
shall itself bear interest at the rate of 10 1/2% per annum (to the extent that
the payment of such interest shall be legally enforceable), and shall accrue
from the date of such demand for payment to the date payment of such interest
has been made or duly provided for, and such interest on unpaid interest shall
also be payable on demand.

                  If this Security is issued in the form of a Global Security,
payments of the principal of (and premium, if any) and interest on this Security
shall be made in immediately available funds to the Depositary. If this Security
is issued in certificated form, payment of the principal of (and premium, if
any) and interest on this Security will be made at the corporate trust office of
the Trustee and at the office or agency of the Company maintained for that
purpose in the Borough of Manhattan, The City of New York, New York, and at any
other office or agency maintained by the Company for such purpose, in such coin
or currency of the United States of America as at the time of payment is legal
tender for payment of public and private debts; PROVIDED, HOWEVER, that at the
option of the Company payment of interest may be made by check mailed to the
address of the Person entitled thereto as such address shall appear in the
Security Register.

                                      -38-
<PAGE>

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

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

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

Dated: November 17, 1999.

                                            NEXTLINK Communications, Inc.

                                            By______________________________
                                              Name:
                                              Title:

Attest:

------------------------------
Name:
Title:

SECTION 203.  FORM OF REVERSE OF SECURITY.

                  This Security is one of a duly authorized issue of Securities
of the Company designated as its 10 1/2% Senior Notes Due 2009 (the
"Securities") issued under an Indenture, dated as of November 17, 1999 (herein
called the "Indenture"), between the Company and United States Trust Company of
New York, as trustee (herein called the "Trustee", which term includes any
successor trustee under the Indenture). The Securities are limited in aggregate
principal amount to $400,000,000. Reference is hereby made to the Indenture and
all indentures supplemental thereto for a statement of the respective rights,
limitations of rights, duties and immunities thereunder of the Company, the
Trustee and the Holders of the Securities and of the terms upon which the
Securities are, and are to be, authenticated and delivered.

                  The Securities are subject to redemption upon not less than 30
nor more than 60 days' notice by mail to each Holder of

                                      -39-
<PAGE>

Securities to be redeemed at such Holder's address appearing in the Security
Register, in amounts of $1,000 or an integral multiple of $1,000, at any time on
or after December 1, 2004 and prior to maturity, as a whole or in part, at the
election of the Company, at the following Redemption Prices (expressed as
percentages of the principal amount) plus accrued and unpaid interest to but
excluding the Redemption Date (subject to the right of Holders of record on the
relevant Regular Record Date to receive interest due on an Interest Payment that
is on or prior to the Redemption Date), if redeemed during the 12-month period
beginning December 1, of each of the years indicated below:

<TABLE>
<CAPTION>
                                            Redemption
                Year                            Price
                ----                           ------
               <S>                             <C>
               2004                            105.250%
               2005                            103.500%
               2006                            101.750%
</TABLE>

and thereafter at a Redemption Price equal to 100.000% of the principal amount,
together in the case of any such redemption with accrued interest to the
Redemption Date, but interest installments whose Stated Maturity is on or prior
to such Redemption Date will be payable to the Holders of such Securities, or
one or more Predecessor Securities, of record at the close of business on the
relevant Record Dates referred to on the face hereof, all as provided in the
Indenture.

                  The Securities are further subject to redemption on or prior
to December 1, 2002 only in the event that on or before December 1, 2002 the
Company receives net proceeds from a sale of its Common Equity, in which case
the Company may, at its option, use all or a portion of any such net proceeds to
redeem Securities in a principal amount of up to an aggregate amount equal to
33 1/3% of the original principal amount of the Securities, at a Redemption
Price of 110.5% of their principal amount plus accrued and unpaid interest of
the Securities to be redeemed to but excluding the Redemption Date (subject
to the right of Holders of record to receive interest due on an Interest
Payment Date that is on or prior to the Redemption Date); PROVIDED, HOWEVER,
that Securities in an amount equal to at least 66 2/3% of the original
aggregate principal amount of the Securities remain Outstanding after such
redemption and such redemption occurs on a Redemption Date within 90 days of
any such sale of the Company's Common Equity and upon not less than 30 nor
more than 60 days' notice by mail to each Holder of Securities to be redeemed
at such Holder's address appearing in the Security Register. The Company may
only redeem the Securities in amounts of $1,000 or an integral multiple of
$1,000.

                                      -40-
<PAGE>

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

                  The Securities do not have the benefit of any sinking fund
obligations.

                  The Indenture provides that, subject to certain conditions, if
(i) a Change of Control occurs or (ii) certain Net Available Proceeds are
available to the Company as a result of any Asset Disposition, the Company shall
be required to make an Offer to Purchase for all or a specified portion of the
Securities.

                  [If not a Global Security -- In the event of redemption or
purchase pursuant to an Offer to Purchase of this Security in part only, a new
Security or Securities of like tenor for the unredeemed or unpurchased portion
hereof will be issued in the name of the Holder hereof upon the cancellation
hereof.]

                  [If a Global Security insert -- In the event of a deposit or
withdrawal of an interest in this Security (including upon an exchange,
transfer, redemption or repurchase of this Security in part only) effected in
accordance with the Applicable Procedures, the Security Registrar, upon receipt
of notice of such event from the Depositary's custodian for this Security, shall
make an adjustment on its records to reflect an increase or decrease of the
Outstanding principal amount of this Security resulting from such deposit or
withdrawal, as the case may be.]

                  If an Event of Default shall occur and be continuing, the
principal of all the Securities may be declared due and payable in the manner
and with the effect provided in the Indenture.

                  The Indenture contains provisions for defeasance at any time
of (i) the entire indebtedness of this Security, or (ii) certain restrictive
covenants and Events of Default with respect to this Security, in each case upon
compliance with certain conditions set forth therein.

                  Unless the context otherwise requires, the Original Securities
(as defined in the Indenture) and the Exchange Securities (as defined in the
Indenture) shall constitute one series for all purposes under the Indenture,
including without limitation, amendments, waivers, redemptions and Offers to
Purchase.

                  The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of

                                      -41-
<PAGE>

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

                  As provided in and subject to the provisions of the Indenture,
the Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default, the Holders of not
less than 25% in principal amount of the Outstanding Securities shall have made
written request to the Trustee to institute proceedings in respect of such Event
of Default as Trustee and offered the Trustee reasonable indemnity, and the
Trustee shall not have received from the Holders of a majority in principal
amount of Outstanding Securities a direction inconsistent with such request, and
shall have failed to institute any such proceeding, for 60 days after receipt of
such notice, request and offer of indemnity. The foregoing shall not apply to
any suit instituted by the Holder of this Security for the enforcement of any
payment of principal hereof or any premium or interest hereon on or after the
respective due dates expressed herein.

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

                  As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Security is registrable in
the Security Register, upon surrender of this Security for registration of
transfer at the office or agency of the Company in the Borough of Manhattan, The
City of New York, New York, duly endorsed by, or accompanied by a written
instrument of transfer in form satisfactory to the Company and

                                      -42-
<PAGE>

the Security Registrar duly executed by, the Holder hereof or his attorney duly
authorized in writing, and thereupon one or more new Securities, of authorized
denominations and like tenor and for the same aggregate principal amount, will
be issued to the designated transferee or transferees.

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

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

                  Prior to due presentment of this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Security is registered as the owner
hereof for all purposes, whether or not this Security be overdue, and none of
the Company, the Trustee or any such agent shall be affected by notice to the
contrary.

                  Interest [If an Original Security, then insert: (other than
Additional Interest)] on this Security shall be computed on the basis of a
360-day year of twelve 30-day months.

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

                       OPTION OF HOLDER TO ELECT PURCHASE

                  If you want to elect to have this Security purchased in its
entirety by the Company pursuant to Section 1013 or 1016 of the Indenture, check
the box:

                                     / /

                                      -43-
<PAGE>

                  If you want to elect to have only a part of this Security
purchased by the Company pursuant to Section 1013 or 1016 of the Indenture,
state the amount: $___________

Dated:________________                        Your Signature __________________
                                                    (Sign exactly as name
                                                    appears on the other side of
                                                    this Security)

Signature Guarantee:________________________________________
                    Notice: Signature(s) must be guaranteed by
                    an "eligible guarantor institution" meeting
                    the requirements of the Trustee, which
                    requirements will include membership or
                    participation in STAMP or such other
                    "signature guarantee program" as may be
                    determined by the Trustee in addition to, or
                    in substitution for STAMP, all in accordance
                    with the Securities Exchange Act of 1934, as
                    amended.

SECTION 204.  ADDITIONAL PROVISIONS REQUIRED IN GLOBAL SECURITY.

                  Any Global Security issued hereunder shall, in addition to the
provisions contained in Sections 202 and 203, bear a legend in substantially the
following form:

                  [If a Global Security, insert -- THIS SECURITY IS A GLOBAL
SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS
REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY
NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER
OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY
PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE.]

                  [If a Global Security to be held by the Depository Trust
Company, insert -- UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND
ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER
NAME AS IS

                                      -44-
<PAGE>

REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO
CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY A PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE
& CO., HAS AN INTEREST HEREIN.]

SECTION 205.  FORM OF TRUSTEE'S CERTIFICATE OF
              AUTHENTICATION.

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

                    United States Trust Company of New York,
                                                                      as Trustee

                                               By ____________________
                                                  Authorized Signatory

                                  ARTICLE THREE

                                 The Securities

SECTION 301.  TITLE AND TERMS.

                  The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is limited to $400,000,000,
except for Securities authenticated and delivered upon registration of transfer
of, or in exchange for, or in lieu of, other Securities pursuant to Section 304,
305, 306, 906 or 1108 or in connection with an Offer to Purchase pursuant to
Section 1013 or 1016.

                  The Company may issue Exchange Securities from time to time
pursuant to an Exchange Offer or otherwise, in each case pursuant to a Board
Resolution, subject to Section 303, included in an Officers' Certificate
delivered to the Trustee, in authorized denominations in exchange for a like
principal amount of Original Securities. Upon any such exchange the Original
Securities shall be canceled in accordance with Section 309 and shall no longer
be deemed Outstanding for any purpose. In no event shall the aggregate principal
amount of Original Securities and Exchange Securities Outstanding exceed
$400,000,000.

                                      -45-
<PAGE>

                  The Securities shall be known and designated as the "10 1/2%
Senior Notes due 2009" of the Company. The Stated Maturity of the Securities
shall be December 1, 2009. The Securities shall bear interest at the rate of
10 1/2% per annum, from November 17, 1999 or from the most recent Interest
Payment Date thereafter to which interest has been paid or duly provided for,
as the case may be, payable semi-annually on June 1 and December 1,
commencing June 1, 2000, until the principal thereof is paid or made
available for payment; PROVIDED, HOWEVER, with respect to Original
Securities, if there has been a Registration Default, a Step-Up will occur
and the Original Securities will from then bear Additional Interest until the
Step-Down Date and, if either the Exchange Offer has not been consummated or,
if applicable, the Resale Registration Statement has not become or been
declared effective, in each case, by April 30, 2000, a Subsequent Step-Up
will occur and the Original Securities will from then bear Additional
Interest until the Subsequent Step-Down Date. Accrued Additional Interest, if
any, shall be paid in cash in arrears semi-annually on June 1 and December 1
in each year, and the amount of accrued Additional Interest shall be
determined on the basis of the number of days actually elapsed. In connection
with the cash payment of any Additional Interest, the Company shall notify
the Trustee (the "Additional Interest Notice") on or before the later to
occur of (i) the Regular Record Date preceding such payment of any Additional
Interest, and (ii) the date on which any such Additional Interest begins to
accrue, of the amount of Additional Interest to be paid by the Company on the
next Interest Payment Date. In the event of the occurrence of a Step-Down
Date during the period between the date on which the Additional Interest
Notice is given and the next Interest Payment Date, the Company shall so
notify the Trustee and shall provide the Trustee with the revised amount of
Additional Interest to be paid by the Company on such Interest Payment Date.

                  In the case of a default in payment of principal and premium,
if any, upon acceleration or redemption, interest shall be payable pursuant to
the preceding paragraph on such overdue principal (and premium, if any), such
interest shall be payable on demand and, if not so paid on demand, such interest
shall itself bear interest at the rate of 10 1/2% per annum (to the extent that
the payment of such interest shall be legally enforceable), and shall accrue
from the date of such demand for payment to the date payment of such interest
has been made or duly provided for, and such interest on unpaid interest shall
also be payable on demand.

                  If this Security is issued in the form of a Global Security,
payments of the principal of (and premium, if any) and interest on this Security
shall be made in immediately available funds to the Depositary. If the
Securities are issued in

                                      -46-
<PAGE>

certificated form, the principal of and premium, if any, and interest on the
Securities shall be payable at the corporate trust office of the Trustee in the
Borough of Manhattan, The City of New York, New York, maintained for such
purpose and at any other office or agency maintained by the Company for such
purpose; PROVIDED, HOWEVER, that at the option of the Company payment of
interest may be made by check mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

                  The Securities shall be subject to repurchase by the Company
pursuant to an Offer to Purchase as provided in Sections 1013 and 1016.

                  The Securities shall be redeemable as provided in Article
Eleven.

                  The Securities shall not have the benefit of any sinking fund
obligations.

                  The Securities shall be subject to defeasance at the option of
the Company as provided in Article Twelve.

                  Unless the context otherwise requires, the Original Securities
and the Exchange Securities shall constitute one series for all purposes under
the Indenture, including without limitation, amendments, waivers, redemptions
and Offers to Purchase.

SECTION 302.  DENOMINATIONS.

                  The Securities shall be issuable only in registered form
without coupons and only in denominations of $1,000 and any integral multiple
thereof.

SECTION 303.  EXECUTION, AUTHENTICATION, DELIVERY
              AND DATING.

                  The Securities shall be executed on behalf of the Company by
its Chief Executive Officer, its President, its Executive Vice President or one
of its Vice Presidents and attested by its Secretary or Assistant Secretary. The
signature of any of these officers on the Securities may be manual or facsimile.

                  Securities bearing the manual or facsimile signatures of
individuals who were at any time the proper officers of the Company shall bind
the Company, notwithstanding that such individuals or any of them have ceased to
hold such offices prior to

                                      -47-
<PAGE>

the authentication and delivery of such Securities or did not hold such offices
at the date of such Securities.

                  At any time and from time to time after the execution and
delivery of this Indenture, the Company may deliver Securities executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities; and the Trustee in accordance
with such Company Order shall authenticate and deliver such Securities as in
this Indenture provided and not otherwise.

                  At any time and from time to time after the execution and
delivery of this Indenture and after the effectiveness of a Registration
Statement under the Securities Act with respect thereto, the Company may deliver
Exchange Securities executed by the Company to the Trustee for authentication,
together with a Company Order for the authentication and delivery of such
Exchange Securities and a like principal amount of Original Securities for
cancellation in accordance with Section 309 of this Indenture, and the Trustee
in accordance with the Company Order shall authenticate and deliver such
Securities. In authenticating such Exchange Securities, and accepting the
additional responsibilities under this Indenture in relation to such Securities,
the Trustee shall be entitled to receive, and (subject to Section 601) shall be
fully protected in relying upon, an Opinion of Counsel stating,

                  (a) that such Exchange Securities have been duly and validly
         issued in accordance with the terms of the Indenture, and are entitled
         to all the rights and benefits set forth herein; and

                  (b) that the issuance of the Exchange Securities in exchange
         for the Original Securities has been effected in compliance with the
         Securities Act of 1933, as amended.

                  Each Security shall be dated the date of its authentication.

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

                                      -48-
<PAGE>

SECTION 304.  TEMPORARY SECURITIES.

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

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

SECTION 305.  REGISTRATION, REGISTRATION OF
              TRANSFER AND EXCHANGE.

                  (a) The Company shall cause to be kept at the Corporate Trust
Office of the Trustee a register (the register maintained in such office and in
any other office or agency designated pursuant to Section 1002 being herein
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as they may prescribe, the Company shall provide
for the registration of Securities and of transfers and exchanges of Securities.
The Trustee is hereby appointed "Security Registrar" for the purpose of
registering Securities and transfers and exchanges of Securities as herein
provided.

                  Such Security Register shall distinguish between
Original Securities and Exchange Securities.

                  Subject to the other provisions of this Indenture regarding
restrictions on transfer, upon surrender for registration of transfer of any
Security at an office or agency of the Company designated pursuant to Section
1002 for such purpose in accordance with the terms hereof, the Company shall
execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new

                                      -49-
<PAGE>

Securities of any authorized denominations and of a like tenor and aggregate
principal amount and bearing such restrictive legends as may be required by this
Indenture.

                  At the option of the Holder and subject to the other
provisions of this Section 305, Securities may be exchanged for other Securities
of any authorized denominations and of a like tenor and aggregate principal
amount and bearing the applicable legends set forth in Section 202, upon
surrender of the Securities to be exchanged at such office or agency. Whenever
any Securities are so surrendered for exchange, the Company shall execute, and
the Trustee shall authenticate and deliver, the Securities which the Holder
making the exchange is entitled to receive.

                  All Securities issued upon any registration of transfer or
exchange of Securities shall be the valid obligations of the Company, evidencing
the same debt, and (subject to the provisions in the Original Securities
regarding the payment of Additional Interest) entitled to the same benefits
under this Indenture, as the Securities surrendered upon such registration of
transfer or exchange.

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

                  No service charge shall be made to the Holder for any
registration of transfer or exchange of Securities, but the Company may require
payment of a sum sufficient to cover any tax or other governmental charge that
may be imposed in connection with any registration of transfer or exchange of
Securities, other than exchanges pursuant to Section 304, 305, 906 or 1108 or in
accordance with any Offer to Purchase pursuant to Section 1013 or 1016 not
involving any transfer.

                  The Company shall not be required (i) to issue, register the
transfer of or exchange any Security during a period beginning at the opening of
business 15 days before the day of the mailing of a notice of redemption of
Securities selected for redemption under Section 1104 and ending at the close of
business on the day of such mailing, or (ii) to register the transfer of or
exchange any Security so selected for redemption in whole or in part, except the
unredeemed portion of any Security being redeemed in part.

                  (b) CERTAIN TRANSFERS AND EXCHANGES. Notwithstanding any other
provision of this Indenture or the Securities,

                                      -50-
<PAGE>

transfers and exchanges of Securities and beneficial interests in a Global
Security of the kinds specified in this Section 305(b) shall be made only in
accordance with this Section 305(b).

                         (i) RESTRICTED GLOBAL SECURITY TO REGULATION S GLOBAL
         SECURITY. If the owner of a beneficial interest in the Restricted
         Global Security wishes at any time to transfer such interest to a
         Person who wishes to acquire the same in the form of a beneficial
         interest in the Regulation S Global Security, such transfer may be
         effected only in accordance with the provisions of this Clause (b)(i)
         and Clause (b)(iv) below and subject to the Applicable Procedures. Upon
         receipt by the Trustee, as Security Registrar, of (A) an order given by
         the Depositary or its authorized representative directing that a
         beneficial interest in the Regulation S Global Security in a specified
         principal amount be credited to a specified Agent Member's account and
         that a beneficial interest in the Restricted Global Security in an
         equal principal amount be debited from another specified Agent Member's
         account and (B) a Regulation S Certificate, satisfactory to the Trustee
         and duly executed by the owner of such beneficial interest in the
         Restricted Global Security or his attorney duly authorized in writing,
         then the Trustee, as Security Registrar but subject to Clause (b)(vii)
         below, shall reduce the principal amount of the Restricted Global
         Security and increase the principal amount of the Regulation S Global
         Security by such specified principal amount.

                        (ii) REGULATION S GLOBAL SECURITY TO RESTRICTED GLOBAL
         SECURITY. If the owner of a beneficial interest in the Regulation S
         Global Security wishes at any time to transfer such interest to a
         Person who wishes to acquire the same in the form of a beneficial
         interest in the Restricted Global Security, such transfer may be
         effected only in accordance with this Clause (b)(ii) and subject to the
         Applicable Procedures. Upon receipt by the Trustee, as Security
         Registrar, of (A) an order given by the Depositary or its authorized
         representative directing that a beneficial interest in the Restricted
         Global Security in a specified principal amount be credited to a
         specified Agent Member's account and that a beneficial interest in the
         Regulation S Global Security in an equal principal amount be debited
         from another specified Agent Member's account and (B) if such transfer
         is to occur during the Restricted Period, a Restricted Securities
         Certificate, satisfactory to the Trustee and duly executed by the owner
         of such beneficial interest in the Regulation S Global Security or his
         attorney duly authorized in writing, then the Trustee, as Security
         Registrar, shall reduce the principal amount of the Regulation S Global
         Security and increase the principal

                                      -51-
<PAGE>

         amount of the Restricted Global Security by such specified principal
         amount.

                  (iii) NON-GLOBAL SECURITY TO NON-GLOBAL SECURITY. A Security
         that is not a Global Security may be transferred, in whole or in part,
         to a Person who takes delivery in the form of another Security that is
         not a Global Security as provided in Section 305(a), PROVIDED that, if
         the Security to be transferred in whole or in part is a Restricted
         Security, or is a Regulation S Security and the transfer is to occur
         during the Restricted Period, then the Trustee shall have received (A)
         a Restricted Securities Certificate, satisfactory to the Trustee and
         duly executed by the transferor Holder or his attorney duly authorized
         in writing, in which case the transferee Holder shall take delivery in
         the form of a Restricted Security, or (B) a Regulation S Certificate,
         satisfactory to the Trustee and duly executed by the transferor Holder
         or his attorney duly authorized in writing, in which case the
         transferee Holder shall take delivery in the form of a Regulation S
         Security (subject in every case to Section 305(c)).

                        (iv) REGULATION S GLOBAL SECURITY TO BE HELD THROUGH
         EUROCLEAR OR CEDEL DURING RESTRICTED PERIOD. The Company shall use its
         best efforts to cause the Depositary to ensure that, until the
         expiration of the Restricted Period, beneficial interests in the
         Regulation S Global Security may be held only in or through accounts
         maintained at the Depositary by Euroclear or Cedel (or by Agent Members
         acting for the account thereof), and no person shall be entitled to
         effect any transfer or exchange that would result in any such interest
         being held otherwise than in or through such an account; PROVIDED that
         this Clause (b)(iv) shall not prohibit any transfer or exchange of such
         an interest in accordance with Clause (b)(ii) above.

                         (v) EXCHANGES OF BOOK-ENTRY SECURITIES FOR CERTIFICATED
         SECURITIES. A beneficial interest in a Global Security may not be
         exchanged for a Security in certificated form unless (i) DTC (x)
         notifies the Company that it is unwilling or unable to continue as
         Depositary for the Global Security or (y) has ceased to be a clearing
         agency registered under the Exchange Act and in either case the Company
         thereupon fails to appoint a successor Depositary, (ii) the Company, at
         its option, notifies the Trustee in writing that it elects to cause the
         issuance of the Securities in certificated form or (iii) there shall
         have occurred and be continuing an Event of Default or any event which
         after notice or lapse of time or both would be an Event of Default with
         respect to the Securities. In all cases, certificated Securities
         delivered in exchange for any

                                      -52-
<PAGE>

         Global Security or beneficial interests therein will be registered in
         the names, and issued in any approved denominations, requested by or on
         behalf of the Depositary (in accordance with its customary procedures).
         Any certificated Security issued in exchange for an interest in a
         Global Security will bear the legend restricting transfers that is
         borne by such Global Security. Any such exchange will be effected
         through the DWAC System and an appropriate adjustment will be made in
         the records of the Security Registrar to reflect a decrease in the
         principal amount of the relevant Global Security.

                  (c) SECURITIES ACT LEGENDS. Rule 144A Securities and their
Successor Securities shall bear a Restricted Securities Legend, and the
Regulation S Securities and their Successor Securities shall bear a Regulation S
Legend, subject to the following:

                         (i) subject to the following Clauses of this Section
         305(c), a Security or any portion thereof which is exchanged, upon
         transfer or otherwise, for a Global Security or any portion thereof
         shall bear the Securities Act Legend borne by such Global Security
         while represented thereby;

                        (ii) subject to the following Clauses of this Section
         305(c), a new Security which is not a Global Security and is issued in
         exchange for another Security (including a Global Security) or any
         portion thereof, upon transfer or otherwise, shall bear the Securities
         Act Legend borne by such other Security, PROVIDED that, if such new
         Security is required pursuant to Section 305(b)(v) or (vi) to be issued
         in the form of a Restricted Security, it shall bear a Restricted
         Securities Legend and, if such new Security is so required to be issued
         in the form of a Regulation S Security, it shall bear a Regulation S
         Legend;

                       (iii) Registered Securities shall not bear a Securities
         Act Legend;

                        (iv) at any time after the Securities may be freely
         transferred without registration under the Securities Act or without
         being subject to transfer restrictions pursuant to the Securities Act,
         a new Security which does not bear a Securities Act Legend may be
         issued in exchange for or in lieu of a Security (other than a Global
         Security) or any portion thereof which bears such a legend if the
         Trustee has received an Unrestricted Securities Certificate,
         satisfactory to the Trustee and duly executed by the Holder of such
         legended Security or his attorney duly authorized in writing, and after
         such date and receipt of such certificate, the Trustee shall
         authenticate and deliver such

                                      -53-
<PAGE>

         a new Security in exchange for or in lieu of such other Security as
         provided in this Article Three;

                         (v) a new Security which does not bear a Securities Act
         Legend may be issued in exchange for or in lieu of a Security (other
         than a Global Security) or any portion thereof which bears such a
         legend if, in the Company's judgment, placing such a legend upon such
         new Security is not necessary to ensure compliance with the
         registration requirements of the Securities Act, and the Trustee, at
         the direction of the Company, shall authenticate and deliver such a new
         Security as provided in this Article Three; and

                        (vi) notwithstanding the foregoing provisions of this
         Section 305(c), a Successor Security of a Security that does not bear a
         particular form of Securities Act Legend shall not bear such form of
         legend unless the Company has reasonable cause to believe that such
         Successor Security is a "restricted security" within the meaning of
         Rule 144, in which case the Trustee, at the direction of the Company,
         shall authenticate and deliver a new Security bearing a Restricted
         Securities Legend in exchange for such Successor Security as provided
         in this Article Three.

SECTION 306.  MUTILATED, DESTROYED, LOST AND
              STOLEN SECURITIES.

                  If any mutilated Security is surrendered to the Trustee, the
Company shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

                  If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of like tenor and principal amount and bearing a number not contemporaneously
outstanding.

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

                                      -54-
<PAGE>

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

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

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

SECTION 307.  PAYMENT OF INTEREST; INTEREST
              RIGHTS PRESERVED.

                  Interest on any Security which is payable, and is punctually
paid or duly provided for, on any Interest Payment Date shall be paid to the
Person in whose name that Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest.

                  Any interest (including Additional Interest) on any Security
which is payable, but is not punctually paid or duly provided for, on any
Interest Payment Date (herein called "Defaulted Interest") shall (a) bear
interest at the rate per annum stated in the form of Security included herein
(to the extent that the payment of such interest shall be legally enforceable),
and (b) forthwith cease to be payable to the Holder on the relevant Regular
Record Date by virtue of having been such Holder, and such Defaulted Interest
may be paid by the Company, at its election in each case, as provided in Clause
(1) or (2) below:

                   (1) The Company may elect to make payment of any
          Defaulted Interest to the Persons in whose names the
          Securities (or their respective Predecessor Securities) are
          registered at the close of business on a Special Record Date
          for the payment of such Defaulted Interest, which shall be
          fixed in the following manner. The Company shall notify the
          Trustee in writing of the amount of Defaulted Interest
          proposed to be paid on each Security

                                      -55-
<PAGE>

          and the date of the proposed payment, and at the same time the
          Company shall deposit with the Trustee an amount of money
          equal to the aggregate amount proposed to be paid in respect
          of such Defaulted Interest or shall make arrangements
          satisfactory to the Trustee for such deposit prior to the date
          of the proposed payment, such money when deposited to be held
          in trust for the benefit of the Persons entitled to such
          Defaulted Interest as in this Clause provided. Thereupon the
          Trustee shall fix a Special Record Date for the payment of
          such Defaulted Interest which shall be not more than 15 days
          and not less than 10 days prior to the date of the proposed
          payment and not less than 10 days after the receipt by the
          Trustee of the notice of the proposed payment. The Trustee
          shall promptly notify the Company of such Special Record Date
          and, in the name and at the expense of the Company, shall
          cause notice of the proposed payment of such Defaulted
          Interest and the Special Record Date therefor to be mailed,
          first-class postage prepaid, to each Holder at his address as
          it appears in the Security Register, not less than 10 days
          prior to such Special Record Date. Notice of the proposed
          payment of such Defaulted Interest and the Special Record Date
          therefor having been so mailed, such Defaulted Interest shall
          be paid to the Persons in whose names the Securities (or their
          respective Predecessor Securities) are registered at the close
          of business on such Special Record Date and shall no longer be
          payable pursuant to the following Clause (2).

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

                  Subject to the foregoing provisions of this Section, each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of

                                      -56-
<PAGE>

any other Security shall carry the rights to interest accrued and unpaid, and to
accrue, which were carried by such other Security.

SECTION 308.  PERSONS DEEMED OWNERS.

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

SECTION 309.  CANCELLATION.

                  All Securities surrendered for payment, redemption,
registration of transfer, exchange or pursuant to any Offer to Purchase pursuant
to Section 1013 or 1016 shall, if surrendered to any Person other than the
Trustee, be delivered to the Trustee and shall be promptly cancelled by it. The
Company may at any time deliver to the Trustee for cancellation any Securities
previously authenticated and delivered hereunder which the Company may have
acquired in any manner whatsoever, and all Securities so delivered shall be
promptly cancelled by the Trustee. No Securities shall be authenticated in lieu
of or in exchange for any Securities cancelled as provided in this Section,
except as expressly permitted by this Indenture. All cancelled Securities held
by the Trustee shall be disposed of in accordance with its standard procedures
or as directed by a Company Order; PROVIDED, HOWEVER, that the Trustee shall not
be required to destroy such Securities.

SECTION 310.  COMPUTATION OF INTEREST.

                  Interest on the Securities shall be computed on the basis of a
360-day year of twelve 30-day months, except that Additional Interest shall be
computed on the basis of a 365-day year.

                                      -57-

<PAGE>

SECTION 311.  CUSIP NUMBERS.

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

                                  ARTICLE FOUR

                           Satisfaction and Discharge

SECTION 401.  SATISFACTION AND DISCHARGE OF INDENTURE.

                  This Indenture shall cease to be of further effect as to all
outstanding Securities (except as to (i) rights of registration of transfer and
exchange and the Company's right of optional redemption, (ii) substitution of
apparently mutilated, defaced, destroyed, lost or stolen Securities, (iii)
rights of holders of Securities to receive payment of principal of and premium,
if any, and interest on the Securities, (iv) rights, obligations and immunities
of the Trustee under the Indenture and (v) rights of the holders of the
Securities as beneficiaries of the Indenture with respect to any property
deposited with the Trustee payable to all or any of them), and the Trustee, on
demand of and at the expense of the Company, shall execute proper instruments
acknowledging satisfaction and discharge of this Indenture, when

                  (1)  either

                           (A) the Company will have paid or caused to be paid
                  the principal of and premium, if any, and interest on the
                  Securities as and when the same will have become due and
                  payable; or

                           (B) all outstanding Securities (except lost, stolen
                  or destroyed Securities which have been replaced or paid) have
                  been delivered to the Trustee for cancellation;

                                      -58-

<PAGE>

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

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

                  (3) the Company has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent herein provided for relating to the satisfaction and
         discharge of this Indenture have been complied with; and

                  (4) the Trustee shall have received such other documents and
         assurances as the Trustee shall have reasonably requested.

Notwithstanding the satisfaction and discharge of this Indenture, (i) the
obligations of the Company to the Trustee under Section 607, (ii) substitution
of apparently mutilated, defaced, destroyed, lost or stolen Securities, (iii)
rights of holders of Securities to receive payment of principal of and premium,
if any, and interest on the Securities, (iv) rights, obligations and immunities
of the Trustee under this Indenture (including, if money shall have been
deposited with the Trustee pursuant to subclause (B) of Clause (1) of this
Section, the obligations of the Trustee under Section 402 and the last paragraph
of Section 1003), and (v) rights of holders of the Securities as beneficiaries
of this Indenture with respect to any property deposited with the Trustee
payable to all or any of them, shall survive.

SECTION 402.  APPLICATION OF TRUST MONEY.

                  Subject to the provisions of the last paragraph of Section
1003, all money deposited with the Trustee pursuant to Section 401 shall be held
in trust and applied by it, in accordance with the provisions of the Securities
and this Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled

                                      -59-
<PAGE>

thereto, of the principal (and premium, if any) and interest for whose payment
such money has been deposited with the Trustee.

                                  ARTICLE FIVE

                                    Remedies

SECTION 501.  EVENTS OF DEFAULT.

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

                  (1) default in the payment of any interest upon any Security
         when it becomes due and payable, and continuance of such default for a
         period of 30 days; or

                  (2) default in the payment of the principal of (or premium, if
         any, on) any Security when due; or

                  (3) default in the payment of principal and interest upon any
         Security required to be purchased pursuant to an Offer to Purchase
         pursuant to Sections 1013 or 1016 when due and payable; or

                  (4)  default in the performance, or breach, of
         Section 801; or

                  (5) default in the performance, or breach, of any covenant or
         warranty of the Company in this Indenture or in any Security (other
         than a covenant or warranty a default in whose performance or whose
         breach is elsewhere in this Section specifically dealt with), and
         continuance of such default or breach for a period of 60 days after
         there has been given, by registered or certified mail, to the Company
         by the Trustee or to the Company and the Trustee by the Holders of at
         least 25% in aggregate principal amount of the Outstanding Securities a
         written notice specifying such default or breach and requiring it to be
         remedied and stating that such notice is a "Notice of Default"
         hereunder; or

                  (6) a default or defaults under any bond(s), debenture(s),
         note(s) or other evidence(s) of Debt by the Company or any Significant
         Subsidiary of the

                                      -60-
<PAGE>

         Company or under any mortgage(s), indenture(s) or instrument(s) under
         which there may be issued or by which there may be secured or evidenced
         any Debt of such type by the Company or any such Significant Subsidiary
         with a principal amount then outstanding, individually or in the
         aggregate, in excess of $10 million, whether such Debt now exists or
         shall hereafter be created, which default or defaults shall constitute
         a failure to pay such Debt when due at the final maturity thereof, or
         shall have resulted in such Debt becoming or being declared due and
         payable prior to the date on which it would otherwise have become due
         and payable; or

                  (7) a final judgment or final judgments (not subject to
         appeal) for the payment of money are entered against the Company or any
         Significant Subsidiary in an aggregate amount in excess of $10 million
         by a court or courts of competent jurisdiction, which judgments remain
         undischarged or unstayed for a period (during which execution shall not
         be effectively stayed) of 45 days after the right to appeal all such
         judgments has expired; or

                  (8) the entry by a court having jurisdiction in the premises
         of (A) a decree or order for relief in respect of the Company or any
         Significant Subsidiary in an involuntary case or proceeding under any
         applicable Federal or State bankruptcy, insolvency, reorganization or
         other similar law or (B) a decree or order adjudging the Company or any
         Significant Subsidiary a bankrupt or insolvent, or approving as
         properly filed a petition seeking reorganization, arrangement,
         adjustment or composition of or in respect of the Company or any
         Significant Subsidiary under any applicable Federal or State law, or
         appointing a custodian, receiver, liquidator, assignee, trustee,
         sequestrator or other similar official of the Company or any
         Significant Subsidiary or of any substantial part of its property, or
         ordering the winding up or liquidation of its affairs, and the
         continuance of any such decree or order for relief or any such other
         decree or order unstayed and in effect for a period of 60 consecutive
         days; or

                  (9) the commencement by the Company or any Significant
         Subsidiary of a voluntary case or proceeding under any applicable
         Federal or State bankruptcy, insolvency, reorganization or other
         similar law or of any other case or proceeding to be adjudicated a
         bankrupt or insolvent, or the consent by it to the

                                      -61-
<PAGE>

         entry of a decree or order for relief in respect of the Company or any
         Significant Subsidiary in an involuntary case or proceeding under any
         applicable Federal or State bankruptcy, insolvency, reorganization or
         other similar law or to the commencement of any bankruptcy or
         insolvency case or proceeding against it, or the filing by it of a
         petition or answer or consent seeking reorganization or relief under
         any applicable Federal or State law, or the consent by it to the filing
         of such petition or to the appointment of or taking possession by a
         custodian, receiver, liquidator, assignee, trustee, sequestrator or
         other similar official of the Company or any Significant Subsidiary or
         of any substantial part of its property, or the making by it of an
         assignment for the benefit of creditors, or the admission by it in
         writing of its inability to pay its debts generally as they become due,
         or the taking of corporate action by the Company or any Significant
         Subsidiary in furtherance of any such action.

SECTION 502.  ACCELERATION OF MATURITY; RESCISSION
              AND ANNULMENT.

                  If an Event of Default (other than an Event of Default
specified in Section 501(8) or (9) with respect to the Company) occurs and is
continuing, then and in every such case the Trustee or the Holders of not less
than 25% in aggregate principal amount of the Outstanding Securities may declare
the Default Amount of all the Securities to be due and payable immediately, by a
notice in writing to the Company (and to the Trustee if given by Holders), and
upon any such declaration such Default Amount and any accrued interest, together
with all other amounts due under this Indenture, shall become immediately due
and payable. If an Event of Default specified in Section 501(8) or (9) with
respect to the Company occurs, the Default Amount of and any accrued interest on
the Securities then Outstanding, together with all other amounts due under this
Indenture, shall ipso facto become immediately due and payable without any
declaration or other Act on the part of the Trustee or any Holder.

                  The "Default Amount" in respect of any particular Security as
of any particular date of acceleration shall equal the principal amount of the
Security plus accrued and unpaid interest to such date.

                  At any time after such a declaration of acceleration has been
made and before a judgment or decree for

                                      -62-
<PAGE>

payment of the money due based on acceleration has been obtained by the Trustee
as hereinafter in this Article provided, the Holders of a majority in aggregate
principal amount of the Outstanding Securities, by written notice to the Company
and the Trustee, may rescind and annul such declaration and its consequences if:

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

                           (A)  all overdue interest on all Securities,

                           (B) the principal of (and premium, if any, on) any
                  Securities which have become due otherwise than by such
                  declaration of acceleration (including any Securities required
                  to have been purchased on the Purchase Date pursuant to an
                  Offer to Purchase made by the Company) and interest thereon at
                  the rate borne by the Securities,

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

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

         and

                  (2) all Events of Default, other than the non-payment of the
         principal of Securities which have become due solely by such
         declaration of acceleration, have been cured or waived as provided in
         Section 513.

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

SECTION 503.  COLLECTION OF INDEBTEDNESS AND SUITS
              FOR ENFORCEMENT BY TRUSTEE.

                  The Company covenants that if

                  (1) default is made in the payment of any interest on any
         Security when such interest becomes due and payable and such default
         continues for a period of 30 days, or

                                      -63-
<PAGE>

                  (2) default is made in the payment of the principal of (or
         premium, if any, on) any Security at the Maturity thereof or, with
         respect to any Security required to have been purchased pursuant to an
         Offer to Purchase made by the Company, at the Purchase Date thereof,

the Company will, upon demand of the Trustee, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal (and premium, if any) and interest, and, to the extent
that payment of such interest shall be legally enforceable, interest on any
overdue principal (and premium, if any) and on any overdue interest, at the rate
provided by the Securities, and, in addition thereto, such further amount as
shall be sufficient to cover the costs and expenses incurred by the Trustee
under this Indenture, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

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

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

SECTION 504.  TRUSTEE MAY FILE PROOFS OF CLAIM.

                  In case of any judicial proceeding relative to the Company (or
any other obligor upon the Securities), its property or its creditors, the
Trustee shall be entitled and empowered, by intervention in such proceeding or
otherwise, to take any and all actions authorized under the Trust Indenture Act
in order to have claims of the Holders and the Trustee allowed in any such
proceeding. In particular, the Trustee shall be authorized to collect and
receive any

                                      -64-
<PAGE>

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

                  No provision of this Indenture shall be deemed to authorize
the Trustee to authorize or consent to or accept or adopt on behalf of any
Holder any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder thereof or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding;
PROVIDED, HOWEVER, that the Trustee may, on behalf of the Holders, vote for the
election of a trustee in bankruptcy or similar official and be a member of a
creditors or other similar committee.

SECTION 505.  TRUSTEE MAY ENFORCE CLAIMS WITHOUT
              POSSESSION OF SECURITIES.

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

SECTION 506.  APPLICATION OF MONEY COLLECTED.

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

                                      -65-
<PAGE>

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

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

The Trustee, upon prior written notice to the Company, may fix a record date and
payment date for any payment to the Holders pursuant to this Section 506.

SECTION 507.  LIMITATION ON SUITS.

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

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

                  (2) the Holders of at least 25% in aggregate principal amount
         of the Outstanding Securities shall have made written request to the
         Trustee to institute proceedings in respect of such Event of Default in
         its own name as Trustee hereunder;

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

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

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

it being understood and intended that no one or more Holders shall have any
right in any manner whatever by virtue of, or

                                      -66-
<PAGE>

by availing of, any provision of this Indenture to affect, disturb or prejudice
the rights of any other Holders, or to obtain or to seek to obtain priority or
preference over any other Holders or to enforce any right under this Indenture,
except in the manner herein provided and for the equal and ratable benefit of
all the Holders.

SECTION 508.  UNCONDITIONAL RIGHT OF HOLDERS
              TO RECEIVE PRINCIPAL, PREMIUM
              AND INTEREST.

                  Notwithstanding any other provision in this Indenture, the
Holder of any Security shall have the right, which is absolute and
unconditional, to receive payment of the principal of (and premium, if any) and
(subject to Section 307) interest on such Security on the respective Stated
Maturities expressed in such Security (or, in the case of redemption, on the
Redemption Date or, in the case of an Offer to Purchase made by the Company and
required to be accepted as to such Security, on the Purchase Date) and to
institute suit for the enforcement of any such payment, and such rights shall
not be impaired without the consent of such Holder.

SECTION 509.  RESTORATION OF RIGHTS AND REMEDIES.

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

SECTION 510.  RIGHTS AND REMEDIES CUMULATIVE.

                  Except as otherwise provided with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities in the last
paragraph of Section 306, no right or remedy herein conferred upon or reserved
to the Trustee or to the Holders is intended to be exclusive of any other right
or remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or

                                      -67-
<PAGE>

hereafter existing at law or in equity or otherwise. The assertion or employment
of any right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

SECTION 511.  DELAY OR OMISSION NOT WAIVER.

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

SECTION 512.  CONTROL BY HOLDERS.

                  The Holders of a majority in aggregate principal amount of the
Outstanding Securities shall have the right to direct the time, method and place
of conducting any proceeding for any remedy available to the Trustee or
exercising any trust or power conferred on the Trustee, PROVIDED that

                  (1) such direction shall not be in conflict with any rule of
         law or with this Indenture or expose the Trustee to personal liability
         (as determined in the sole discretion of the Trustee), and

                  (2) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction.

The Trustee may refuse, however, to follow any direction that the Trustee, in
its sole discretion, determines may be unduly prejudicial to the rights of
another Holder or that may subject the Trustee to any liability or expense if
the Trustee determines, in its sole discretion, that it lacks indemnification
against such loss or expense.

SECTION 513.  WAIVER OF PAST DEFAULTS.

                  The Holders of not less than a majority in aggregate principal
amount of the Outstanding Securities may on behalf of the Holders of all the
Securities by written notice to the Trustee waive any past default hereunder and
its consequences, except a default

                                      -68-
<PAGE>

                  (1) in the payment of the principal of (or premium, if any) or
         interest on any Security (including any Security which is required to
         have been purchased pursuant to an Offer to Purchase which has been
         made by the Company), or

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

                  (3) arising from failure to purchase any Security tendered
         pursuant to Sections 1013 and 1016.

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

SECTION 514.  UNDERTAKING FOR COSTS.

                  In any suit for the enforcement of any right or remedy under
this Indenture, or in any suit against the Trustee for any action taken or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; PROVIDED that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company.

SECTION 515.  WAIVER OF STAY OR EXTENSION LAWS.

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

                                      -69-
<PAGE>

                                   ARTICLE SIX

                                   The Trustee

SECTION 601.  CERTAIN DUTIES AND RESPONSIBILITIES.

                  The duties and responsibilities of the Trustee shall be as
provided by the Trust Indenture Act. Notwithstanding the foregoing, no provision
of this Indenture shall require the Trustee to expend or risk its own funds or
otherwise incur any financial liability in the performance of any of its duties
hereunder, or in the exercise of any of its rights or powers, if it shall have
reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it.
Whether or not therein expressly so provided, every provision of this Indenture
relating to the conduct or affecting the liability of or affording protection to
the Trustee shall be subject to the provisions of this Section.

SECTION 602.  NOTICE OF DEFAULTS.

                  The Trustee shall give the Holders notice of any Default
hereunder as and to the extent provided by the Trust Indenture Act, unless such
Default has been cured or waived; PROVIDED, HOWEVER, that in the case of any
Default of the character specified in Section 501(5), no such notice to Holders
shall be given until at least 30 days after the occurrence thereof.

SECTION 603.  CERTAIN RIGHTS OF TRUSTEE.

                  Subject to the provisions of Section 601:

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

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

                                      -70-
<PAGE>

                  (c) whenever in the administration of this Indenture the
         Trustee shall deem it desirable that a matter be proved or established
         prior to taking, suffering or omitting any action hereunder, the
         Trustee (unless other evidence be herein specifically prescribed) may,
         in the absence of bad faith on its part, rely upon an Officers'
         Certificate or an Opinion of Counsel;

                  (d) the Trustee may consult with counsel and the written
         advice of such counsel or any Opinion of Counsel shall be full and
         complete authorization and protection in respect of any action taken,
         suffered or omitted by it hereunder in good faith and in reliance
         thereon;

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

                  (f) the Trustee shall not be bound to make any investigation
         into the facts or matters stated in any resolution, certificate,
         statement, instrument, opinion, report, notice, request, direction,
         consent, order, bond, debenture, note, other evidence of indebtedness
         or other paper or document, but the Trustee, in its discretion, may
         make such further inquiry or investigation into such facts or matters
         as it may see fit, and, if the Trustee shall determine to make such
         further inquiry or investigation, it shall be entitled to examine the
         books, records and premises of the Company, personally or by agent or
         attorney;

                  (g) the Trustee may execute any of the trusts or powers
         hereunder or perform any duties hereunder either directly or by or
         through agents or attorneys and the Trustee shall not be responsible
         for any misconduct or negligence on the part of any agent or attorney
         appointed with due care by it hereunder; and

                  (h) the Trustee shall not be liable for any action taken,
         suffered or omitted by it in good faith which the Trustee reasonably
         believed to have been authorized or within its rights or powers.

                                      -71-
<PAGE>

SECTION 604.  NOT RESPONSIBLE FOR RECITALS
              OR ISSUANCE OF SECURITIES.

                  The recitals contained herein and in the Securities, except
the Trustee's certificates of authentication, shall be taken as the statements
of the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture or the Securities. The Trustee shall not be accountable for the use or
application by the Company of Securities or the proceeds thereof.

SECTION 605.  MAY HOLD SECURITIES.

                  The Trustee, any Paying Agent, any Security Registrar (if
other than the Trustee) or any other agent of the Company, in its individual or
any other capacity, may become the owner or pledgee of Securities and, subject
to Sections 608 and 613, may otherwise deal with the Company with the same
rights it would have if it were not Trustee, Paying Agent, Security Registrar or
such other agent.

SECTION 606.  MONEY HELD IN TRUST.

                  Money held by the Trustee in trust hereunder need not be
segregated from other funds except to the extent required by law. The Trustee
shall be under no liability for interest on any money received by it hereunder
except as otherwise agreed with the Company.

SECTION 607.  COMPENSATION AND REIMBURSEMENT.

                  The Company agrees

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

                  (2) except as otherwise expressly provided herein, to
         reimburse the Trustee upon its request for all reasonable expenses,
         disbursements and advances incurred or made by the Trustee in
         accordance with any provision of this Indenture (including the
         reasonable compensation and the expenses and disbursements of its
         agents and counsel), except any such expense,

                                      -72-
<PAGE>

         disbursement or advance as may be attributable to its negligence or bad
         faith; and

                  (3) to indemnify the Trustee for, and to hold it harmless
         against, any loss, liability or expense (including the reasonable
         compensation, expenses and disbursements of its agents, accountants,
         experts and counsel) incurred without negligence or bad faith on its
         part, arising out of or in connection with the acceptance or
         administration of this trust, including the costs and expenses of
         enforcing this Indenture against the Company (including, without
         limitation, this Section 607) and of defending itself against any claim
         (whether asserted by any Holder or the Company) or liability in
         connection with the exercise or performance of any of its powers or
         duties hereunder. The provisions of this Section 607 shall survive any
         termination of this Indenture and the resignation or removal of the
         Trustee.

                  As security for the performance of the obligations of the
Company under this Section 607, the Trustee shall have a lien prior to the
Securities upon all property and funds held or collected by the Trustee, except
funds held in trust for the payment of principal of (and premium, if any) or
interest on particular Securities. The Trustee's right to receive payment of any
amounts due under this Section 607 shall not be subordinate to any other
liability or indebtedness of the Company (even though the Securities may be so
subordinated).

                  When the Trustee incurs expenses or renders services after an
Event of Default specified in Section 501(8) or (9) occurs, the expenses and the
compensation for such services are intended to constitute expenses of
administration under Title 11, U.S. Code, or any similar Federal state or
foreign law for the relief of debtors.

SECTION 608.  DISQUALIFICATION; CONFLICTING INTERESTS.

                  If the Trustee has or shall acquire a conflicting interest
within the meaning of the Trust Indenture Act, the Trustee shall either
eliminate such interest or resign, to the extent and in the manner provided by,
and subject to the provisions of, the Trust Indenture Act and this Indenture.

                                      -73-
<PAGE>

SECTION 609.  CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

                  There shall at all times be a Trustee hereunder which shall be
a Person that is eligible pursuant to the Trust Indenture Act to act as such and
has a combined capital and surplus of at least $50,000,000 and its Corporate
Trust Office in the Borough of Manhattan, The City of New York, New York. If
such Person publishes reports of condition at least annually, pursuant to law or
to the requirements of a Federal, State, Territorial or District of Columbia
supervising or examining authority, then for the purposes of this Section, the
combined capital and surplus of such Person shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time the Trustee shall cease to be eligible in accordance
with the provisions of this Section, it shall resign immediately in the manner
and with the effect hereinafter specified in this Article.

SECTION 610.  RESIGNATION AND REMOVAL; APPOINTMENT
              OF SUCCESSOR.

                  (a) No resignation or removal of the Trustee and no
appointment of a successor Trustee pursuant to this Article shall become
effective until the acceptance of appointment by the successor Trustee under
Section 611, at which time the retiring Trustee shall be fully discharged from
its obligations hereunder.

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

                  (c) The Trustee may be removed at any time by Act of the
Holders of a majority in principal amount of the Outstanding Securities,
delivered to the Trustee and to the Company.

                  (d) If at any time:

                  (1) the Trustee shall fail to comply with Section 608 after
         written request therefor by the Company or by any Holder who has been a
         bona fide Holder of a Security for at least six months, or

                                      -74-
<PAGE>

                  (2) the Trustee shall cease to be eligible under Section 609
         and shall fail to resign after written request therefor by the Company
         or by any such Holder, or

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

then, in any such case, (i) the Company, by Board Resolution, may remove the
Trustee, or (ii) subject to Section 514, any Holder who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee.

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

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

                                      -75-
<PAGE>

SECTION 611.  ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

                  Every successor Trustee appointed hereunder shall execute,
acknowledge and deliver to the Company and to the retiring Trustee an instrument
accepting such appointment, and thereupon the resignation or removal of the
retiring Trustee shall become effective and such successor Trustee, without any
further act, deed or conveyance, shall become vested with all the rights,
powers, trusts and duties of the retiring Trustee; but, on request of the
Company or the successor Trustee under Section 607, execute and deliver an
instrument transferring to such successor Trustee all the rights, powers and
trusts of the retiring Trustee and shall duly assign, transfer and deliver to
such successor Trustee all property and money held by such retiring Trustee
hereunder. Upon request of any such successor Trustee, the Company shall execute
any and all instruments for more fully and certainly vesting in and confirming
to such successor Trustee all such rights, powers and trusts.

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

SECTION 612.  MERGER, CONVERSION, CONSOLIDATION
              OR SUCCESSION TO BUSINESS.

                  Any corporation into which the Trustee may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Trustee shall be a
party, or any corporation succeeding to all or substantially all the corporate
trust business of the Trustee, shall be the successor of the Trustee hereunder,
PROVIDED that such corporation shall be otherwise qualified and eligible under
this Article, without the execution or filing of any paper or any further act on
the part of any of the parties hereto. In case any Securities shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.

SECTION 613.  PREFERENTIAL COLLECTION
              OF CLAIMS AGAINST THE COMPANY.

                  If and when the Trustee shall be or become a creditor of the
Company (or any other obligor upon the

                                      -76-
<PAGE>

Securities), the Trustee shall be subject to the provisions of the Trust
Indenture Act regarding the collection of claims against the Company (or any
such other obligor).

SECTION 614.  APPOINTMENT OF AUTHENTICATING AGENT.

                  The Trustee may appoint an Authenticating Agent or Agents with
respect to the Securities which shall be authorized to act on behalf of the
Trustee to authenticate Securities issued upon original issue and upon exchange,
registration of transfer or partial redemption thereof or pursuant to Section
306, and Securities so authenticated shall be entitled to the benefits of this
Indenture and shall be valid and obligatory for all purposes as if authenticated
by the Trustee hereunder. Wherever reference is made in this Indenture to the
authentication and delivery of Securities by the Trustee or the Trustee's
certificate of authentication, such reference shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each Authenticating Agent shall be acceptable to the
Company and shall at all times be a corporation organized and doing business
under the laws of the United States of America, any State thereof or the
District of Columbia, authorized under such laws to act as Authenticating Agent,
having a combined capital and surplus of not less than $50,000,000 and subject
to supervision or examination by Federal or State authority. If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or to the requirements of said supervising or examining authority, then
for the purposes of this Section, the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. If at any time an
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, such Authenticating Agent shall resign immediately
in the manner and with the effect specified in this Section.

                  Any corporation into which an Authenticating Agent may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which such
Authenticating Agent shall be a party, or any corporation succeeding to the
corporate agency or corporate trust business of an Authenticating Agent, shall
continue to be an Authenticating Agent, provided such corporation shall be
otherwise eligible under this Section, without the execution or filing of any
paper

                                      -77-
<PAGE>

or any further act on the part of the Trustee or the Authenticating Agent.

                  An Authenticating Agent may resign at any time by giving
written notice thereof to the Trustee and to the Company. The Trustee may at any
time terminate the agency of an Authenticating Agent by giving written notice
thereof to such Authenticating Agent and to the Company. Upon receiving such a
notice of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall give notice of such
appointment in the manner provided in Section 106 to all Holders of Securities.
Any successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers and duties of its predecessor
hereunder, with like effect as if originally named as an Authenticating Agent.
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section.

                  The Trustee agrees to pay to each Authenticating Agent from
time to time reasonable compensation for its services under this Section, and
the Trustee shall be entitled to be reimbursed for such payments, subject to the
provisions of Section 607.

                  If an appointment is made pursuant to this Section, the
Securities may have endorsed thereon, in lieu of the Trustee's certificate of
authentication, an alternative certificate of authentication in the following
form:

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

                                      United States Trust Company of New York,
                                                                    AS TRUSTEE

                                     By......................................,
                                                       AS AUTHENTICATING AGENT

                                     By.......................................
                                                          AUTHORIZED SIGNATORY

                                      -78-
<PAGE>

                                  ARTICLE SEVEN

     Holders' Lists and Reports by Trustee and the Company

SECTION 701.  COMPANY TO FURNISH TRUSTEE
              NAMES AND ADDRESSES OF HOLDERS.

                  The Company will furnish or cause to be furnished
to the Trustee

                  (a) semi-annually, not more than 15 days after each Regular
         Record Date, a list, in such form as the Trustee may reasonably
         require, of the names and addresses of the Holders as of such Regular
         Record Date, and

                  (b) at such other times as the Trustee may request in writing,
         within 30 days after the receipt by the Company of any such request, a
         list of similar form and content as of a date not more than 15 days
         prior to the time such list is furnished;

EXCLUDING from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

SECTION 702.  PRESERVATION OF INFORMATION;
              COMMUNICATIONS TO HOLDERS.

                  (a) The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Holders contained in the most
recent list furnished to the Trustee as provided in Section 701 and the names
and addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

                  (b) The rights of Holders to communicate with other Holders
with respect to their rights under this Indenture or under the Securities, and
the corresponding rights and duties of the Trustee, shall be as provided by the
Trust Indenture Act.

                  (c) Every Holder of Securities, by receiving and holding the
same, agrees with the Company and the Trustee that none of the Company, the
Trustee or any agent of any of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.

                                      -79-
<PAGE>

SECTION 703.  REPORTS BY TRUSTEE.

                  (a) The Trustee shall transmit to Holders such reports
concerning the Trustee and its actions under this Indenture as may be required
pursuant to the Trust Indenture Act at the times and in the manner provided
pursuant thereto.

                  (b) A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission and with the Company. The
Company will notify the Trustee when the Securities are listed on any stock
exchange.

SECTION 704.  REPORTS BY COMPANY.

                  The Company shall file with the Trustee and the Commission,
and transmit to Holders, such information, documents and other reports, and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner provided pursuant to such Act and in the manner set
forth in Section 1017; PROVIDED that any such information, documents or reports
required to be filed with the Commission pursuant to Section 13 or 15(d) of the
Exchange Act ("SEC Reports") shall be filed with the Trustee within 15 days
after the same is so required to be filed with the Commission. In the event the
Company shall cease to be required to file SEC Reports pursuant to the Exchange
Act, the Company will nonetheless continue to file such reports with the
Commission (unless the Commission will not accept such a filing) and the Trustee
and to furnish copies of such SEC Reports to the Holders of Securities at the
time the Company is required to file such reports with the Trustee and will make
such information available to investors who request it in writing.

SECTION 705.  OFFICERS' CERTIFICATE WITH RESPECT
              TO CHANGE IN INTEREST RATES.

                  Within five days after any Step-Up, Subsequent Step-Up,
Step-Down Date or Subsequent Step-Down Date, the Company shall deliver an
Officers' Certificate to the Trustee stating the new interest rate and the date
on which it became effective.

                                      -80-
<PAGE>

                                  ARTICLE EIGHT

                           Merger, Consolidation, Etc.

SECTION 801.  MERGERS, CONSOLIDATIONS AND CERTAIN
              SALES OF ASSETS.

                  (a) The Company may not, in a single transaction or a series
of related transactions, (i) consolidate with or merge into any other Person or
permit any other Person to consolidate with or merge into the Company (other
than a consolidation or merger of a Wholly-Owned Restricted Subsidiary organized
under the laws of a State of the United States into the Company), or (ii)
directly or indirectly, transfer, sell, lease or otherwise dispose of all or
substantially all of its assets (determined on a consolidated basis for the
Company and its Restricted Subsidiaries taken as a whole and provided that the
creation of a Lien on or in any of its assets shall not in and of itself
constitute the transfer, sale, lease or disposition of the assets subject to the
Lien), unless: (1) in a transaction in which the Company does not survive or in
which the Company sells, leases or otherwise disposes of all or substantially
all of its assets to any other Person, the successor entity to the Company shall
be a corporation organized under the laws of the United States of America or any
State thereof or the District of Columbia and shall expressly assume, by a
supplemental indenture executed and delivered to the Trustee in form
satisfactory to the Trustee, all of the Company's obligations under this
Indenture; (2) immediately after giving pro forma effect to such transaction as
if such transaction had occurred at the beginning of the last full fiscal
quarter immediately prior to the consummation of such transaction with the
appropriate adjustments with respect to the transaction being included in such
pro forma calculation and treating any Debt which becomes an obligation of the
Company or a Subsidiary as a result of such transaction as having been Incurred
by the Company or such Subsidiary at the time of the transaction, no Default or
Event of Default shall have occurred and be continuing; (3) immediately after
giving effect to such transaction, the Consolidated Net Worth of the Company (or
other successor entity to the Company) is equal to or greater than that of the
Company immediately prior to the transaction; (4) if, as a result of any such
transaction, property or assets of the Company would become subject to a Lien
prohibited by the provisions of Section 1011, the Company or the successor
entity to the Company shall have secured the Securities as required by Section
1011;(5) the Company has delivered to the Trustee an Officer's Certificate and
an Opinion of Counsel, each in form and substance satisfactory to the Trustee
stating that such consolidation,

                                      -81-
<PAGE>

merger, conveyance, transfer, lease or acquisition and, if a supplemental
indenture is required in connection with such transaction, such supplemental
indenture, complies with this Article and that all conditions precedent herein
provided for relating to such transaction have been complied with, and, with
respect to such Officer's Certificate, setting forth the manner of determination
of the Consolidated Net Worth in accordance with Clause (3) of Section 801, of
the Company or, if applicable, of the Successor Company as required pursuant to
the foregoing.

                  (b) In the event of any transaction (other than a lease)
described in and complying with the immediately preceding paragraph in which the
Company is not the surviving Person and the surviving Person assumes all the
obligations of the Company under the Securities and this Indenture pursuant to a
supplemental indenture, such surviving Person shall succeed to, and be
substituted for, and may exercise every right and power of, the Company, and the
Company will be discharged from its obligations under this Indenture and the
Securities; PROVIDED that solely for the purpose of calculating amounts under
Section 1009(3), any such surviving Person shall only be deemed to have
succeeded to and be substituted for the Company with respect to the period
subsequent to the effective time of such transaction, and the Company (before
giving effect to such transaction) shall be deemed to be the "Company" for such
purposes for all prior periods.

SECTION 802.  SUCCESSOR SUBSTITUTED.

                  Upon any consolidation of the Company with, or merger of the
Company with or into, any other Person or any conveyance, transfer or lease of
the properties and assets of the Company substantially as an entirety in
accordance with Section 801, the successor Person formed by such consolidation
or into which the Company is merged or to which such conveyance, transfer or
lease is made shall succeed to, and be substituted for, and may exercise every
right and power of, the Company under this Indenture with the same effect as if
such successor Person had been named as the Company herein, and thereafter,
except in the case of a lease, the predecessor Person shall be relieved of all
obligations and covenants under this Indenture and the Securities.

                                      -82-
<PAGE>

                                  ARTICLE NINE

                             Supplemental Indentures

SECTION 901.  SUPPLEMENTAL INDENTURES
              WITHOUT CONSENT OF HOLDERS.

                  Without the consent of any Holders, the Company, when
authorized by Board Resolution, and the Trustee, at any time and from time to
time, may enter into one or more indentures supplemental hereto, in form
satisfactory to the Trustee, for any of the following purposes:

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

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

                  (3) to secure the Securities pursuant to the requirements of
         Section 1011 or otherwise; or

                  (4) to modify, eliminate or add to the provisions of this
         Indenture to such extent as shall be necessary to comply with any
         requirement of the Commission in order to effect qualification of this
         Indenture under the Trust Indenture Act in connection with the issuance
         of Exchange Securities or thereafter to maintain the qualification of
         this Indenture under the Trust Indenture Act;

                  (5) to cure any ambiguity, to correct or supplement any
         provision herein which may be inconsistent with any other provision
         herein, or to make any other provisions with respect to matters or
         questions arising under this Indenture which shall not be inconsistent
         with the provisions of this Indenture, PROVIDED that such action
         pursuant to this Clause (5) shall not adversely affect the legal rights
         of the Holders; or

                  (6) to provide for uncertificated Securities in addition to or
         in place of certificated Securities.

                                      -83-
<PAGE>

SECTION 902.  SUPPLEMENTAL INDENTURES
              WITH CONSENT OF HOLDERS.

                  With the consent of the Holders of not less than a majority in
aggregate principal amount of the Outstanding Securities, by Act of said Holders
delivered to the Company and the Trustee, and consistent with Section 513, the
Company, when authorized by Board Resolution, and the Trustee may enter into an
indenture or indentures supplemental hereto for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or of modifying in any manner the rights of the Holders under
this Indenture; PROVIDED, HOWEVER, that no such supplemental indenture shall,
without the consent of the Holder of each Outstanding Security affected thereby,

                  (1) change the Stated Maturity of the principal of, or any
         installment of interest on, any Security, or reduce the principal
         amount thereof or the rate of interest thereon or any premium payable
         thereon, or change the place of payment where, or the coin or currency
         in which, any Security or any premium or interest thereon is payable,
         or impair the right to institute suit for the enforcement of any such
         payment on or after the Stated Maturity thereof (or, in the case of
         redemption, on or after the Redemption Date) or, in the case of an
         Offer to Purchase which has been made, on or after the applicable
         Purchase Date, or

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

                  (3) modify any of the provisions of this Section, Section 513
         or Section 1019, except to increase any such percentage or to provide
         that certain other provisions of this Indenture cannot be modified or
         waived without the consent of the Holder of each Outstanding Security
         affected thereby, or

                  (4) following the mailing of an Offer with respect to an Offer
         to Purchase pursuant to Section 1013 or 1016 and until the Expiration
         Date of such Offer to Purchase, modify the provisions of this Indenture
         with respect to such Offer to Purchase in a manner materially adverse
         to such Holder.

                                      -84-

<PAGE>

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

SECTION 903.  EXECUTION OF SUPPLEMENTAL INDENTURES.

                  In executing, or accepting the additional trusts created by,
any supplemental indenture permitted by this Article or the modifications
thereby of the trusts created by this Indenture, the Trustee shall be entitled
to receive, and (subject to Section 601) shall be fully protected in relying
upon, an Opinion of Counsel stating that the execution of such supplemental
indenture is authorized or permitted by this Indenture. The Trustee may, but
shall not be obligated to, enter into any such supplemental indenture which
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise.

SECTION 904.  EFFECT OF SUPPLEMENTAL INDENTURES.

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

SECTION 905.  CONFORMITY WITH TRUST INDENTURE ACT.

                  Every supplemental indenture executed pursuant to this Article
shall conform to the requirements of the Trust Indenture Act.

SECTION 906.  REFERENCE IN SECURITIES
              TO SUPPLEMENTAL INDENTURES.

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

                                      -85-

<PAGE>

                                   ARTICLE TEN

                                    Covenants

SECTION 1001.  PAYMENT OF PRINCIPAL, PREMIUM AND
               INTEREST.

                  The Company will duly and punctually pay the principal of and
premium, if any, and interest on the Securities in accordance with the terms of
the Securities and this Indenture.

SECTION 1002.  MAINTENANCE OF OFFICE OR AGENCY.

                  The Company will maintain in the Borough of Manhattan, The
City of New York, New York, an office or agency where Securities may be
presented or surrendered for payment, where Securities may be surrendered for
registration of transfer or exchange and where notices and demands to or upon
the Company in respect of the Securities and this Indenture may be served. The
Company will give prompt written notice to the Trustee of the location, and any
change in the location, of such office or agency. If at any time the Company
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee, and the Company hereby appoints the Trustee as its agent to receive all
such presentations, surrenders, notices and demands.

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

                                      -86-

<PAGE>

SECTION 1003.  MONEY FOR SECURITY
               PAYMENTS TO BE HELD IN TRUST.

                  If the Company shall at any time act as its own Paying Agent,
it will, on or before each due date of the principal of (and premium, if any) or
interest on any of the Securities, segregate and hold in trust for the benefit
of the Persons entitled thereto a sum sufficient to pay the principal (and
premium, if any) or interest so becoming due until such sums shall be paid to
such Persons or otherwise disposed of as herein provided and will promptly
notify the Trustee in writing of its action or failure so to act. As provided in
Section 504, upon any bankruptcy or reorganization proceeding relative to the
Company, the Trustee shall serve as the Paying Agent for the Securities.

                  Whenever the Company shall have one or more Paying Agents, it
will, prior to each due date of the principal of (and premium, if any) or
interest on any Securities, deposit with a Paying Agent a sum sufficient to pay
the principal (and premium, if any) or interest so becoming due, such sum to be
held in trust for the benefit of the Persons entitled to such principal, premium
or interest, and (unless such Paying Agent is the Trustee) the Company will
promptly notify the Trustee in writing of its action or failure so to act. As
provided in Section 504, upon any bankruptcy or reorganization proceeding
relative to the Company the Trustee shall serve as the Paying Agent for the
Securities.

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

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

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

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

                                      -87-

<PAGE>

                  (4) acknowledge, accept and agree to comply in all respects
         with the provisions of this Indenture relating to the duties, rights
         and obligations of such Paying Agent.

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

                  Any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of (and
premium, if any) or interest on any Security and remaining unclaimed for two
years after such principal (and premium, if any) or interest has become due and
payable shall be paid to the Company on the Company Request, or (if then held by
the Company) shall be discharged from such trust; and the Holder of such
Security shall thereafter, as an unsecured general creditor, look only to the
Company for payment thereof, and all liability of the Trustee or such Paying
Agent with respect to such trust money, and all liability of the Company as
trustee thereof, shall thereupon cease; PROVIDED, HOWEVER, that the Trustee or
such Paying Agent, before being required to make any such repayment, may at the
expense of the Company cause to be published once, in a newspaper published in
the English language, customarily published on each Business Day and of general
circulation in the Borough of Manhattan, The City of New York, New York, notice
that such money remains unclaimed and that, after a date specified therein,
which shall not be less than 30 days from the date of such publication, any
unclaimed balance of such money then remaining will be repaid to the Company.

SECTION 1004.  EXISTENCE.

                  Subject to Article Eight, the Company will do or cause to be
done all things necessary to preserve and keep in full force and effect its
existence, rights (charter and statutory) and franchises; PROVIDED, HOWEVER,
that the Company shall not be required to preserve any such right or franchise
if the Board of Directors shall determine that the preservation thereof is no
longer desirable in the conduct

                                      -88-

<PAGE>

of the business of the Company and that the loss thereof is not disadvantageous
in any material respect to the Holders.

SECTION 1005.  MAINTENANCE OF PROPERTIES AND INSURANCE.

                  The Company will cause all properties used or useful in the
conduct of its business or the business of any Subsidiary, to be maintained and
kept in good condition, repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
the Company may be necessary so that the business carried on in connection
therewith may be properly and advantageously conducted at all times; PROVIDED,
HOWEVER, that nothing in this Section shall prevent the Company from
discontinuing the operation or maintenance of any of such properties if such
discontinuance is, as determined in the good faith judgment of the Board of
Directors evidenced by a Board Resolution, desirable in the conduct of its
business or, in the case of the Company, the business of any Subsidiary, and not
disadvantageous in any material respect to the Holders.

                  The Company shall, and shall cause the Subsidiaries of the
Company to, keep at all times all of their properties which are of an insurable
nature insured against loss or damage with insurers believed by the Company to
be responsible to the extent that property of similar character is usually so
insured by corporations similarly situated and owning like properties in
accordance with good business practice.

SECTION 1006.  PAYMENT OF TAXES AND OTHER CLAIMS.

                  The Company will pay or discharge or cause to be paid or
discharged, before the same shall become delinquent,

         (1) all taxes, assessments and governmental charges levied or imposed
upon the Company or any Subsidiaries of the Company or upon the income, profits
or property of the Company or any Subsidiaries, and

         (2) all lawful claims for labor, materials and supplies which, if
unpaid, might by law become a lien upon the property of the Company or any
Subsidiaries of the Company; PROVIDED, HOWEVER, that the Company shall not be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge or claim whose amount, applicability

                                      -89-

<PAGE>

or validity is being contested in good faith by appropriate proceedings.

SECTION 1007.  LIMITATION ON CONSOLIDATED DEBT.

                  The Company may not, and may not permit any
Restricted Subsidiary of the Company to, Incur any Debt
unless either

         (a) the ratio of:

                  (i) the aggregate consolidated principal amount of Debt of the
Company outstanding as of the most recent available quarterly or annual balance
sheet, after giving pro forma effect to the Incurrence of such Debt and any
other Debt Incurred since such balance sheet date and the receipt and
application of the proceeds thereof

         to

                  (ii) Consolidated Cash Flow Available for Fixed Charges for
the four full fiscal quarters next preceding the Incurrence of such Debt for
which consolidated financial statements are available, determined on a pro forma
basis as if

                           (x) any such Debt had been Incurred and the
proceeds thereof had been applied at the beginning of such
four fiscal quarters;

                           (y) the net income (or loss) for such period
of any Person or related to any assets disposed of by the Company or a
Restricted Subsidiary of the Company prior to the end of such period had been
excluded from Consolidated Net Income; and

                           (z) the net income (or loss) for such period
of any Person or related to any assets acquired by the Company or any Restricted
Subsidiary prior to the end of such period had been included in Consolidated Net
Income,

would be less than 5.5 to 1 for such four-quarter periods ending on or prior to
December 31, 1999 and 5.0 to 1 for such periods ending thereafter;

or

         (b) the Company's Consolidated Capital Ratio as of the most recent
available quarterly or annual balance sheet, after giving pro forma effect to
the Incurrence of such

                                      -90-

<PAGE>

Debt, any issuance of Capital Stock (other than Disqualified Stock) since such
balance sheet date, any increase in paid in-capital (other than in respect of
Disqualified Stock) since such balance sheet date and the Incurrence of any
other Debt since such balance sheet date and the receipt and application of the
proceeds thereof, is less than 2.0 to 1.

                  Notwithstanding the foregoing limitation, the Company and any
Restricted Subsidiary may Incur the following:

                (i) Debt under any one or more Bank Credit Agreements or Vendor
         Financing Facilities in an aggregate principal amount at any one time
         not to
         exceed the greater of:

                  (x) $250 million and

                  (y) 85% of the Eligible Receivables, and any renewal,
extension, refinancing or refunding thereof in an amount which, together with
any principal amount remaining outstanding or available under all Bank Credit
Agreements and Vendor Financing Facilities of the Company and its Restricted
Subsidiaries, plus the amount of any premium required to be paid in connection
with such refinancing pursuant to the terms of any Bank Credit Agreement so
refinanced plus the amount of expenses incurred in connection with such
refinancing, does not exceed the aggregate principal amount outstanding or
available under all such Bank Credit Agreements and Vendor Financing Facilities
of the Company and its Restricted Subsidiaries immediately prior to such
renewal, extension, refinancing or refunding;

               (ii) Purchase Money Debt Incurred to finance the construction,
         acquisition or improvement of Telecommunications Assets, PROVIDED that
         the net proceeds of such Purchase Money Debt do not exceed 100% of the
         cost of construction, acquisition or improvement price of the
         applicable Telecommunications Assets;

              (iii) Debt owed by the Company to any Restricted Subsidiary of the
         Company or Debt owed by a Restricted Subsidiary of the Company to the
         Company or a Restricted Subsidiary of the Company; PROVIDED, HOWEVER,
         that upon either

                  (x) the transfer or other disposition by such Restricted
Subsidiary or the Company of any Debt so permitted to a Person other than the
Company or another Restricted Subsidiary of the Company or

                                      -91-

<PAGE>

                  (y) the issuance (other than directors' qualifying shares),
sale, lease, transfer or other disposition of shares of Capital Stock (including
by consolidation or merger) of such Restricted Subsidiary as a result of which
the obligor of such Debt ceases to be a Restricted Subsidiary, the provisions of
this clause (iii) shall no longer be applicable to such Debt and such Debt shall
be deemed to have been Incurred at the time of such transfer or other
disposition;

               (iv) Debt Incurred to renew, extend, refinance or refund (each, a
         "refinancing") Debt outstanding at the date of this Indenture or
         Incurred pursuant to the preceding paragraph or clause (ii) of this
         paragraph or the Securities in an aggregate principal amount not to
         exceed the aggregate principal amount of and accrued interest on the
         Debt so refinanced plus the amount of any premium required to be paid
         in connection with such refinancing pursuant to the terms of the Debt
         so refinanced or the amount of any premium reasonably determined by the
         Company as necessary to accomplish such refinancing by means of a
         tender offer or privately negotiated repurchase, plus the amount of
         expenses of the Company incurred in connection with such refinancing;
         PROVIDED, HOWEVER, that Debt the proceeds of which are used to
         refinance the Securities or Debt which is PARI PASSU to the Securities
         or debt which is subordinate in right of payment to the Securities
         shall only be permitted if:

                  (A) in the case of any refinancing of the Securities or Debt
which is PARI PASSU to the Securities, the refinancing Debt is made PARI PASSU
to the Securities or subordinated to the Securities, and, in the case of any
refinancing of Debt which is subordinated to the Securities, the refinancing
Debt constitutes Subordinated Debt and

                  (B) in either case, the refinancing Debt by its terms, or by
the terms of any agreement or instrument pursuant to which such Debt is issued,

                           (x) does not provide for payments of
principal of such Debt at the stated maturity thereof or by way of a sinking
fund applicable thereto or by way of any mandatory redemption, defeasance,
retirement or repurchase thereof by the Company (including any redemption,
retirement or repurchase which is contingent upon events or circumstances, but
excluding any retirement required by virtue of acceleration of such Debt upon
any event of default thereunder), in each case prior to the time the same are
required by the terms of the Debt being refinanced and

                                      -92-

<PAGE>

                           (y) does not permit redemption or other
retirement (including pursuant to an offer to purchase made by the Company) of
such Debt at the option of the holder thereof prior to the final stated maturity
of the Debt being refinanced, other than a redemption or other retirement at the
option of the holder of such Debt (including pursuant to an offer to purchase
made by the Company) which is conditioned upon a change substantially similar to
the provisions of Section 1016 or which is pursuant to provisions substantially
similar to the provisions of Section 1013;

                (v)  Debt consisting of Permitted Interest Rate and
         Currency Protection Agreements;

               (vi)  Debt outstanding under the Securities;

              (vii) Subordinated Debt invested by:

                  (a) a group of employees of the Company, which includes the
Chief Executive Officer of the Company, who own, directly or indirectly, through
an employee stock ownership plan or arrangement, shares of the Company's Capital
Stock or

                  (b) any other Person that controls the Company

                           (i) on the Issue Date or

                           (ii) after a Change of Control, PROVIDED that
the Company is not in default with respect to its
obligations under Section 1016;

             (viii) Debt consisting of performance and other similar bonds and
         reimbursement obligations Incurred in the ordinary course of business
         securing the performance of contractual, franchise or license
         obligations of the Company or a Restricted Subsidiary, or in respect of
         a letter of credit obtained to secure such performance; and

               (ix) Debt not otherwise permitted to be Incurred pursuant to
         clauses (i) through (viii) above, which, together with any other
         outstanding Debt Incurred pursuant to this clause (ix), has an
         aggregate principal amount (or, in the case of Debt issued at a
         discount, an accreted amount (determined in accordance with generally
         accepted accounting principles) at the time of Incurrence) not in
         excess of $10 million at any time outstanding.

                                      -93-

<PAGE>

                  For purposes of determining compliance with this Section 1007,
in the event that an item of Debt meets the criteria of more than one of the
types of Debt the Company is permitted to incur pursuant to the foregoing
clauses (i) through (ix) or the first paragraph of this Section 1007, the
Company shall have the right, in its sole discretion, to classify such item of
Debt and shall only be required to include the amount and type of such Debt
under the clause or paragraph permitting the Debt as so classified. The
determination of any particular amount of Debt under such covenant shall be made
without duplication for Guarantees or Liens supporting Debt otherwise included
in the determination of a particular amount.

SECTION 1008.  LIMITATION ON DEBT AND PREFERRED STOCK
               OF RESTRICTED SUBSIDIARIES.

                  The Company may not permit any Restricted Subsidiary of the
Company (other than a Restricted Subsidiary that has fully and unconditionally
Guaranteed the Securities on an unsubordinated basis) to Incur or suffer to
exist any Debt or issue any Preferred Stock except:

                (i) Debt or Preferred Stock outstanding on the date of this
         Indenture after giving effect to the application of the proceeds of the
         Securities;

               (ii) Debt Incurred or Preferred Stock issued to and held by the
         Company or a Restricted Subsidiary of the Company (provided that such
         Debt or Preferred Stock is at all times held by the Company or a
         Restricted Subsidiary of the Company);

              (iii)  Debt Incurred or Preferred Stock issued by a
         Person prior to the time:

                  (A) such Person became a Restricted Subsidiary of
the Company,

                  (B) such Person merges into or consolidates with a Restricted
Subsidiary of the Company or

                  (C) another Restricted Subsidiary of the Company merges into
or consolidates with such Person (in a transaction in which such Person becomes
a Restricted Subsidiary of the Company), which Debt or Preferred Stock was not
Incurred or issued in anticipation of such transaction and was outstanding prior
to such transaction;

                                      -94-

<PAGE>

               (iv)  Debt consisting of Permitted Interest Rate and
         Currency Protection Agreements;

                (v)  Debt or Preferred Stock of a Joint Venture;

               (vi) Debt under any one or more Bank Credit Agreements or Vendor
         Financing Facilities (and renewals, extensions, refinancings or
         refundings thereof) which is permitted to be outstanding under clause
         (i) of Section 1007;

              (vii)  Debt consisting of Guarantees of the
         Securities;

             (viii) Debt or Preferred Stock which is exchanged for, or the
         proceeds of which are used to refinance, refund or redeem, any Debt or
         Preferred Stock permitted to be outstanding pursuant to clauses (i),
         (iii) and (ix) hereof (or any extension or renewal thereof) (for
         purposes hereof, a "refinancing"), in an aggregate principal amount, in
         the case of Debt, or with an aggregate liquidation preference, in the
         case of Preferred Stock, not to exceed the aggregate principal amount
         of the Debt so refinanced or the aggregate liquidation preference of
         the Preferred Stock so refinanced, plus the amount of any premium
         required to be paid in connection with such refinancing pursuant to the
         terms of the Debt or Preferred Stock so refinanced or the amount of any
         premium reasonably determined by the Company as necessary to accomplish
         such refinancing by means of a tender offer or privately negotiated
         repurchase, plus the amount of expenses of the Company and the
         Restricted Subsidiary incurred in connection therewith and provided the
         Debt or Preferred Stock incurred or issued upon such refinancing by its
         terms, or by the terms of any agreement or instrument pursuant to which
         such Debt or Preferred Stock is Incurred or issued,

                  (x) does not provide for payments of principal or liquidation
value at the stated maturity of such Debt or Preferred Stock or by way of a
sinking fund applicable to such Debt or Preferred Stock or by way of any
mandatory redemption, defeasance, retirement or repurchase of such Debt or
Preferred Stock by the Company or any Restricted Subsidiary of the Company
(including any redemption, retirement or repurchase which is contingent upon
events or circumstances, but excluding any retirement required by virtue of
acceleration of such Debt upon an event of default thereunder), in each case
prior to the time the same are

                                      -95-

<PAGE>

required by the terms of the Debt or Preferred Stock being refinanced and

                  (y) does not permit redemption or other retirement (including
pursuant to an offer to purchase made by the Company or a Restricted Subsidiary
of the Company) of such Debt or Preferred Stock at the option of the holder
thereof prior to the stated maturity of the Debt or Preferred Stock being
refinanced, other than a redemption or other retirement at the option of the
holder of such Debt or Preferred Stock (including pursuant to an offer to
purchase made by the Company or a Restricted Subsidiary of the Company) which is
conditioned upon the change of control of the Company pursuant to provisions
substantially similar to the provisions of Section 1016 or which is pursuant to
provisions substantially similar to the provisions of Section 1013, and
PROVIDED, FURTHER, that in the case of any exchange or redemption of Preferred
Stock of a Restricted Subsidiary of the Company, such Preferred Stock may only
be exchanged for or redeemed with Preferred Stock of such Restricted Subsidiary;

               (ix) Purchase Money Debt Incurred to finance the construction,
         acquisition or improvement of Telecommunications Assets, PROVIDED that
         the net proceeds of such Purchase Money Debt do not exceed 100% of the
         cost of construction, acquisition or improvement price of the
         applicable Telecommunications Assets; and

                (x) Debt consisting of performance and other similar bonds and
         reimbursement obligations Incurred in the ordinary course of business
         securing the performance of contractual, franchise or license
         obligations of the Company or a Restricted Subsidiary, or in respect of
         a letter of credit obtained to secure such performance; and

               (xi) Debt not otherwise permitted to be incurred pursuant to
         clauses (i) through (x) above, which, together with any other
         outstanding Debt incurred pursuant to this clause (xi), has an
         aggregate principal amount (or, in the case of Debt issued at a
         discount, an accreted amount (determined in accordance with generally
         accepted accounting principles) at the time of Incurrence) not in
         excess of $10 million at any time outstanding.

         For purposes of determining compliance with this Section 1008, in the
event that an item of Debt meets the criteria of more than one of the types of
Debt a Restricted Subsidiary of the Company is permitted to incur pursuant to

                                      -96-

<PAGE>

the foregoing clauses (i) through (xi), the Company shall have the right, in its
sole discretion, to classify such item of Debt and shall be only required to
include the amount and type of such Debt under the clause permitting the Debt as
so classified. The determination of any particular amount of Debt under such
covenant shall be made without duplication for Guarantees or Liens supporting
Debt otherwise included in the determination of a particular amount.

SECTION 1009.  LIMITATION ON RESTRICTED PAYMENTS.

                  The Company:

         (i) may not, directly or indirectly, declare or pay any dividend, or
make any distribution, in respect of its Capital Stock or to the holders thereof
(in their capacity as such), excluding any dividends or distributions payable
solely in shares of its Capital Stock (other than Disqualified Stock) or in
options, warrants or other rights to acquire its Capital Stock (other than
Disqualified Stock);

         (ii) may not, and may not permit any Restricted Subsidiary to,
purchase, redeem, or otherwise retire or acquire for value:

                  (a) any Capital Stock of the Company or any
Related Person of the Company;

         or

                  (b) any options, warrants or rights to purchase or acquire
shares of Capital Stock of the Company or any Related Person of the Company or
any securities convertible or exchangeable into shares of Capital Stock of the
Company or any Related Person of the Company;

         (iii) may not make, or permit any Restricted Subsidiary to make, any
Investment in, or payment on a Guarantee of any obligation of, any Person, other
than the Company or a Restricted Subsidiary of the Company, except for Permitted
Investments; and

         (iv) may not, and may not permit any Restricted Subsidiary to, redeem,
defease, repurchase, retire or otherwise acquire or retire for value, prior to
any scheduled maturity, repayment or sinking fund payment, Debt of the Company
which is subordinate in right of payment to

                                      -97-

<PAGE>

the Securities (each of clauses (i) through (iv) being a "Restricted Payment")

         if:

                  (1) a Default or an Event of Default shall have
occurred and is continuing; or

                  (2) upon giving effect to such Restricted Payment, the Company
could not Incur at least $1.00 of additional Debt pursuant to the provisions of
the first paragraph of Section 1007; or

                  (3) upon giving effect to such Restricted Payment, the
aggregate of all Restricted Payments from April 25, 1996 exceeds the sum of:

                           (a) 50% of cumulative Consolidated Net Income
(or, in the case Consolidated Net Income shall be negative, less 100% of such
deficit) since the end of the last full fiscal quarter prior to April 25, 1996
through the last day of the last full fiscal quarter ending immediately
preceding the date of such Restricted Payment; plus

                           (b) $5 million; plus

                           (c) 100% of the net reduction in Investments
in any Unrestricted Subsidiary since the end of the last full fiscal quarter
prior to April 25, 1996 resulting from payments of interest on Debt, dividends,
repayments of loans or advances, or other transfers of assets, in each case to
the Company or any Restricted Subsidiary of the Company from such Unrestricted
Subsidiary (except to the extent that any such payment is included in the
calculation of Consolidated Net Income) or from redesignations of Unrestricted
Subsidiaries as Restricted Subsidiaries; PROVIDED that the amount included in
this clause (c) shall not exceed the amount of Investments previously made by
the Company and its Restricted Subsidiaries in such Unrestricted Subsidiary;
PROVIDED, FURTHER, that the Company or a Restricted Subsidiary of the Company
may make any Restricted Payment with the aggregate net proceeds received after
April 25, 1996, including the fair value of property other than cash (determined
in good faith by the Board of Directors, as conclusively evidenced by a Board
Resolution filed with the Trustee), as capital contributions to the Company or
from the issuance (other than to a Restricted Subsidiary) of Capital Stock
(other than Disqualified Stock) of the Company and warrants, rights or options
on Capital Stock (other than Disqualified Stock) of the Company and the
principal amount of Debt of the Company that has been converted into Capital

                                      -98-

<PAGE>

Stock (other than Disqualified Stock and other than by a Restricted Subsidiary)
of the Company after April 25, 1996.

                  Notwithstanding the foregoing, the Company may

         (i) pay any dividend on Capital Stock of any class within 60 days after
the declaration thereof if, on the date when the dividend was declared, the
Company could have paid such dividend in accordance with the foregoing
provisions;

         (ii) repurchase any shares of its Common Equity or options to acquire
its Common Equity from Persons who were formerly officers or employees of the
Company, PROVIDED that the aggregate amount of all such repurchases made
pursuant to this clause (ii) shall not exceed $2 million, plus the aggregate
cash proceeds received by the Company since April 25, 1996 from issuances of its
Common Equity or options to acquire its Common Equity to members, officers,
managers, directors and employees of the Company or any of its Subsidiaries;

         (iii) the Company and its Restricted Subsidiaries may refinance any
Debt otherwise permitted by clause (iv) of the second paragraph of Section 1007;
and

         (iv) the Company and its Restricted Subsidiaries may retire or
repurchase any Capital Stock or Subordinated Debt of the Company in exchange
for, or out of the proceeds of the substantially concurrent sale (other than to
a Restricted Subsidiary of the Company) of, Capital Stock (other than
Disqualified Stock) of the Company. If the Company makes a Restricted Payment
which, at the time of the making of such Restricted Payment, would in the good
faith determination of the Company be permitted under this Indenture, such
Restricted Payment shall be deemed to have been made in compliance with this
Indenture notwithstanding any subsequent adjustments made in good faith to the
Company financial statements affecting Consolidated Net Income for any period.

         In determining the aggregate amount expended or available for
Restricted Payments in accordance with clause (3) of the first paragraph above,

                  (1) no amounts expended under clauses (iii) or (iv) of the
immediately preceding paragraph shall be included,

                  (2) 100% of the amounts expended under clauses (i)
and (ii) of the immediately preceding paragraph shall be
included, and

                                      -99-

<PAGE>

                  (3) no amount shall be credited in respect of issuances of
Capital Stock in transactions under clause (iv) of the immediately preceding
paragraph.

SECTION 1010.  LIMITATION ON DIVIDEND AND OTHER
               PAYMENT RESTRICTIONS AFFECTING
               RESTRICTED SUBSIDIARIES.

                  The Company may not, and may not permit any Restricted
Subsidiary to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any consensual encumbrance or restriction on the
ability of any Restricted Subsidiary of the Company

         (i) to pay dividends (in cash or otherwise) or make any other
distributions in respect of its Capital Stock owned by the Company or any other
Restricted Subsidiary of the Company or pay any Debt or other obligation owed to
the Company or any other Restricted Subsidiary;

         (ii) to make loans or advances to the Company or any
other Restricted Subsidiary; or

         (iii) to transfer any of its property or assets to the
Company or any other Restricted Subsidiary.

Notwithstanding the foregoing, the Company may, and may permit any Restricted
Subsidiary to, suffer to exist any such encumbrance or restriction:

                  (a) pursuant to any agreement in effect on the
Issue Date;

                  (b) pursuant to an agreement relating to any Acquired Debt,
which encumbrance or restriction is not applicable to any Person, or the
properties or assets of any Person, other than the Person so acquired and its
Subsidiaries;

                  (c) pursuant to any one or more Bank Credit Agreements or
Vendor Financing Facilities (and renewals, extensions, refinancings or
refundings thereof) which is permitted to be outstanding under clause (i) or
(ii) of Section 1007 or clause (vi) or (ix) of Section 1008, PROVIDED that such
restriction is consistent with, and not materially more restrictive (as
conclusively determined in good faith by the Chief Financial Officer of the
Company), taken as a whole, than, comparable provisions included in similar
agreements or facilities extended to comparable credits engaged in the
Telecommunications Business and

                                     -100-

<PAGE>

PROVIDED FURTHER that, in the case of any such Bank Credit Agreement or Vendor
Financing Facility entered into by a Restricted Subsidiary under clause (ii) of
Section 1007 or clause (ix) of Section 1008, such encumbrances or restrictions
do not prohibit dividends, distributions, loans or advances by such Restricted
Subsidiary to the Company or another Restricted Subsidiary to the extent that
the failure to make such distribution, loan or advance would result in the
Company defaulting in the payment of principal or interest on its indebtedness;

                  (d) pursuant to an agreement effecting a renewal, refunding or
extension of Debt Incurred pursuant to an agreement referred to in clause (a) or
(b) above or (e) below, PROVIDED, HOWEVER, that the provisions contained in such
renewal, refunding or extension agreement relating to such encumbrance or
restriction are not materially more restrictive (as conclusively determined in
good faith by the Chief Financial Officer of the Company), taken as a whole,
than the provisions contained in the agreement the subject thereof;

                  (e) in the case of clause (iii) above, restrictions contained
in any security agreement (including a Capital Lease Obligation) securing Debt
of the Company or a Restricted Subsidiary otherwise permitted under this
Indenture, but only to the extent such restrictions restrict the transfer of the
property subject to such security agreement;

                  (f) in the case of clause (iii) above, customary nonassignment
provisions entered into in the ordinary course of business in leases and other
agreements;

                  (g) any restriction with respect to a Restricted Subsidiary of
the Company imposed pursuant to an agreement which has been entered into for the
sale or disposition of all or substantially all of the Capital Stock or assets
of such Restricted Subsidiary, provided that consummation of such transaction
would not result in a Default or an Event of Default, that such restriction
terminates if such transaction is not consummated and that such consummation or
abandonment of such transaction occurs within one year of the date such
agreement was entered into;

                  (h) pursuant to applicable law or regulations;

                  (i) pursuant to this Indenture and the Securities;
or

                                     -101-

<PAGE>

                  (j) any restriction on the sale or other disposition of assets
or property securing Debt as a result of a Permitted Lien on such assets or
property.

SECTION 1011.  LIMITATION ON LIENS.

                  The Company may not, and may not permit any Restricted
Subsidiary of the Company to, Incur or suffer to exist any Lien on or with
respect to any property or assets now owned or hereafter acquired to secure any
Debt without making, or causing such Restricted Subsidiary to make, effective
provision for securing the Securities:

         (x) equally and ratably with (or prior to) such Debt as to such
property for so long as such Debt will be so secured or

         (y) in the event such Debt is Debt of the Company which is subordinate
in right of payment to the Securities, prior to such Debt as to such property
for so long as such Debt will be so secured.

The foregoing restrictions shall not apply to:

         (i) Liens existing on the Issue Date and securing Debt outstanding on
the Issue Date or securing the Securities or Liens securing Debt Incurred
pursuant to any Bank Credit Agreement or Vendor Financing Facility (whether or
not such Bank Credit Agreement or Vendor Financing Facility was outstanding on
the Issue Date);

         (ii) Liens securing Debt in an amount which, together with the
aggregate amount of Debt then outstanding or available under the Bank Credit
Agreement and Vendor Financing Facility (or under refinancings or amendments of
such agreements), does not exceed 1.5 times the Company's Consolidated Cash Flow
Available for Fixed Charges for the four full fiscal quarters preceding the
Incurrence of such Lien for which consolidated financial statements are
available, determined on a pro forma basis as if such Debt had been Incurred and
the proceeds thereof had been applied at the beginning of such four fiscal
quarters;

         (iii) Liens in favor of the Company or any Wholly-Owned
Restricted Subsidiary of the Company;

         (iv) Liens on real or personal property of the Company or a Restricted
Subsidiary of the Company acquired, constructed or constituting improvements
made after the Issue Date to secure Purchase Money Debt which is Incurred

                                     -102-

<PAGE>

for the construction, acquisition and improvement of Telecommunications Assets
and is otherwise permitted under this Indenture, PROVIDED, HOWEVER, that

                  (a) the net proceeds of any Debt secured by such a Lien does
not exceed 100% of such purchase price or cost of construction or improvement of
the property subject to such Lien,

                  (b) such Lien attaches to such property prior to, at the time
of or within 180 days after the acquisition, completion of construction or
commencement of operation of such property and

                  (c) such Lien does not extend to or cover any property other
than the property (or identifiable portions thereof) acquired, constructed or
constituting the improvements made with the proceeds of such Purchase Money Debt
(it being understood and agreed that all Debt owed to any single lender or group
of lenders or outstanding under any single credit facility shall be considered a
single Purchase Money Debt, whether drawn at one time or from time to time);

         (v) Liens to secure Acquired Debt, PROVIDED, HOWEVER,
that

                  (a) such Lien attaches to the acquired asset prior
to the time of the acquisition of such asset and

                  (b) such Lien does not extend to or cover any
other asset;

         (vi) Liens to secure Debt Incurred to extend, renew, refinance or
refund (or successive extensions, renewals, refinancings or refundings), in
whole or in part, Debt secured by any Lien referred to in the foregoing clauses
(i), (ii), (iv) and (v) so long as such Lien does not extend to any other
property and the principal amount of Debt so secured is not increased except as
otherwise permitted under clause (iv) of Section 1007;

         (vii) Liens securing Debt not otherwise permitted by the foregoing
clauses (i) through (vi) in an amount not to exceed 5% of the Company's
Consolidated Tangible Assets determined as of the most recent available
quarterly or annual balance sheet; and

         (viii) Permitted Liens.

                                     -103-
<PAGE>

SECTION 1012.  LIMITATION ON SALE AND LEASEBACK
               TRANSACTIONS.

                  The Company may not, and may not permit any Restricted
Subsidiary to, enter into any Sale and Leaseback Transaction unless

         (i) the Company or such Restricted Subsidiary would be entitled to
Incur a Lien to secure Debt by reason of the provisions of Section 1011, equal
in amount to the Attributable Value of the Sale and Leaseback Transaction
without equally and ratably securing the Securities; or

         (ii) the Sale and Leaseback Transaction is treated as an Asset
Disposition and all of the conditions of Section 1013 (including the provisions
concerning the application of Net Available Proceeds) are satisfied with respect
to such Sale and Leaseback Transaction, treating all of the consideration
received in such Sale and Leaseback Transaction in the same manner as
consideration in respect of an Asset Disposition for purposes of such covenant.

SECTION 1013.  LIMITATION ON ASSET DISPOSITIONS.

                  (a) The Company may not, and may not permit any Restricted
Subsidiary to, make any Asset Disposition in one or more related transactions
occurring within any 12-month period unless:

                           (i) the Company or the Restricted Subsidiary,
as the case may be, receives consideration for such disposition at least equal
to the fair market value for the assets sold or disposed of as determined by the
Board of Directors in good faith and evidenced by a Board Resolution filed with
the Trustee, which determination shall be conclusive;

                           (ii) at least 75% of the consideration for
such disposition consists of:

                                    (1) cash or readily marketable cash
equivalents or the assumption of Debt or other obligations of the Company (other
than Debt that is subordinated to the Securities) or of the Restricted
Subsidiary and release from all liability on the Debt or other obligations
assumed;

                                    (2) Telecommunications Assets; or

                                     -104-
<PAGE>

                                    (3) shares of publicly-traded Voting Stock
of any Person engaged in the Telecommunications Business in the United States;
and

                           (iii) all Net Available Proceeds, less any
amounts invested in Telecommunications Assets (within 180 days prior to and 360
days following such disposition), are applied within 360 days of such
disposition

                                    (1) first, to the permanent repayment or
reduction of Debt then outstanding under any Bank Credit Agreement or Vendor
Financing Facility, to the extent such agreements would require such application
or prohibit payments pursuant to clause (2) following,

                                    (2) second, to the extent of remaining Net
Available Proceeds, to make an Offer to Purchase outstanding Securities at 100%
of their principal amount plus accrued interest to the date of purchase and, to
the extent required by the terms thereof, any other Debt of the Company that is
PARI PASSU with the Securities at a price no greater than 100% of the principal
amount thereof plus accrued interest to the date of purchase (or 100% of the
accreted value in the case of original issue discount Debt) and

                                    (3) third, to the extent of any remaining
Net Available Proceeds following the completion of the Offer to Purchase, to the
repayment of other Debt of the Company or Debt of a Restricted Subsidiary of the
Company, to the extent permitted under the terms thereof. To the extent any Net
Available Proceeds remain after such uses, the Company and its Restricted
Subsidiaries may use such amounts for any purposes not prohibited by this
Indenture.

                  (b) The Company will mail the Offer for an Offer to Purchase
required pursuant to Section 1013(a) not more than 360 days after consummation
of the disposition referred to in Section 1013(a). The aggregate principal
amount of the Securities to be offered to be purchased pursuant to the Offer to
Purchase shall equal the Net Available Proceeds available therefor pursuant to
Clause (iii)(2) of Section 1013(a) (rounded down to the next lowest integral
multiple of $1,000). Each Holder shall be entitled to tender all or any portion
of the Securities owned by such Holder pursuant to the Offer to Purchase,
subject to the requirement that any portion of a Security tendered must be
tendered in an integral multiple of $1,000 principal amount.

                  The Company shall not be entitled to any credit against its
obligations under this Section 1013 for the

                                     -105-
<PAGE>

principal amount of any Securities acquired or redeemed by the Company otherwise
than pursuant to the Offer to Purchase pursuant to this Section 1013.

                  (c) Not later than the date of the Offer with respect to an
Offer to Purchase pursuant to this Section 1013, the Company shall deliver to
the Trustee an Officers' Certificate as to

                           (i) the Purchase Amount,

                           (ii) the allocation of the Net Available
Proceeds from the Asset Disposition pursuant to which such Offer is being made,
including, if amounts are invested in Telecommunication Assets, the amount of
the assets acquired and

                           (iii) the compliance of such allocation with
the provisions of Section 1013(a).

                  The Company and the Trustee shall perform their respective
obligations specified in the Offer for the Offer to Purchase. On or prior to the
Purchase Date, the Company shall

         (i) accept for payment (on a pro rata basis, if necessary) Securities
or portions thereof tendered pursuant to the Offer,

         (ii) deposit with the Paying Agent (or, if the Company is acting as its
own Paying Agent, segregate and hold in trust as provided in Section 1003) money
sufficient to pay the purchase price of all Securities or portions thereof so
accepted and

         (iii) deliver or cause to be delivered to the Trustee all Securities so
accepted together with an Officers' Certificate stating the Securities or
portions thereof accepted for payment by the Company. The Paying Agent (or the
Company, if so acting) shall promptly mail or deliver to Holders of Securities
so accepted payment in an amount equal to the purchase price, and the Trustee
shall promptly authenticate and mail or deliver to such Holders a new Security
of like tenor equal in principal amount to any unpurchased portion of the
Security surrendered. Any Security not accepted for payment shall be promptly
mailed or delivered by the Company to the Holder thereof.

                  (d) Notwithstanding the foregoing, this Section 1013 shall not
apply to any Asset Disposition which constitutes a transfer, conveyance, sale,
lease or other

                                     -106-
<PAGE>

disposition of all or substantially all of the Company's properties or assets
within the meaning of Section 801 hereof.

SECTION 1014.  LIMITATION ON ISSUANCES AND SALES OF
               CAPITAL STOCK OF RESTRICTED SUBSIDIARIES.

                  The Company may not, and may not permit any Restricted
Subsidiary of the Company to, issue, transfer, convey, sell or otherwise dispose
of any shares of Capital Stock of a Restricted Subsidiary of the Company or
securities convertible or exchangeable into, or options, warrants, rights or any
other interest with respect to, Capital Stock of a Restricted Subsidiary of the
Company to any person other than the Company or a Wholly-Owned Restricted
Subsidiary of the Company except

         (i) in a transaction that complies with the provisions
of Section 1013;

         (ii) if required, the issuance, transfer, conveyance, sale or other
disposition of directors' qualifying shares;

         (iii) in a transaction in which, or in connection with which, the
Company or a Restricted Subsidiary acquires at the same time sufficient Capital
Stock of such Restricted Subsidiary to at least maintain the same percentage
ownership interest it had prior to such transaction;

         (iv) constituting the issuance of Preferred Stock permitted by the
provisions of Section 1008; and

         (v) Disqualified Stock issued in exchange for, or upon conversion of,
or the proceeds of the issuance of which are used to redeem, refinance, replace
or refund shares of Disqualified Stock of such Restricted Subsidiary, provided
that the amounts of the redemption obligations of such Disqualified Stock shall
not exceed the amounts of the redemption obligations of, and such Disqualified
Stock shall have redemption obligations no earlier than those required by, the
Disqualified Stock being exchanged, converted, redeemed, refinanced, replaced or
refunded.

SECTION 1015.  TRANSACTIONS WITH AFFILIATES
               AND RELATED PERSONS.

                  The Company may not, and may not permit any Restricted
Subsidiary of the Company to, enter into any transaction (or series of related
transactions) with an

                                     -107-
<PAGE>

Affiliate or Related Person of the Company (other than the Company or a
Wholly-Owned Restricted Subsidiary of the Company), including any Investment,
but excluding transactions pursuant to employee compensation arrangements
approved by the Board of Directors, either directly or indirectly, unless such
transaction is on terms no less favorable to the Company or such Restricted
Subsidiary than those that could reasonably be obtained in a comparable
arm's-length transaction with an entity that is not an Affiliate or Related
Person and is in the best interests of such Company or such Restricted
Subsidiary. For any transaction that involves in excess of $1 million but less
than or equal to $15 million, the Chief Executive Officer of the Company shall
determine that the transaction satisfies the above criteria and shall evidence
such a determination by an Officer's Certificate filed with the Trustee. For any
transaction that involves in excess of $15 million, the Company shall also
either

         (x) obtain the approval of the transaction from the Board of Directors
including a majority of the disinterested members of the Board of Directors or

         (y) obtain an opinion from a nationally recognized investment bank or
other expert with experience in appraising the terms and conditions, taken as a
whole, of the type of transaction (or series of related transactions) for which
the opinion is required stating that such transaction (or series of related
transactions) is on terms and conditions, taken as a whole, no less favorable to
the Company or such Restricted Subsidiary than those that could be obtained in a
comparable arm's-length transaction with an entity that is not an Affiliate or
Related Person of the Company, which opinion shall be filed with the Trustee.
This covenant shall not apply to Investments by an Affiliate or a Related Person
of the Company in the Capital Stock (other than Disqualified Stock) of the
Company or any Restricted Subsidiary of the Company.

SECTION 1016.  CHANGE OF CONTROL.

                  (a) Within 30 days of the occurrence of a Change of Control,
the Company will be required to make an Offer to Purchase all Outstanding
Securities at a purchase price equal to 101% of their principal amount plus
accrued and unpaid interest to the date of purchase.

                  (b) The Company and Trustee shall perform their respective
obligations specified in the Offer for the Offer

                                     -108-
<PAGE>

to Purchase. On or prior to the Purchase Date, the Company shall

                           (i) accept for payment Securities or portions
thereof tendered pursuant to the Offer,

                           (ii) deposit with the Paying Agent (or, if
the Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) money sufficient to pay the purchase price of all
Securities or portions thereof so accepted and

                           (iii) deliver or cause to be delivered to the
Trustee all Securities so accepted together with an Officers' Certificate
stating the Securities or portions thereof accepted for payment by the Company.
The Paying Agent shall promptly mail or deliver to Holders of Securities so
accepted payment in an amount equal to the purchase price, and the Trustee shall
promptly authenticate and mail or deliver to such Holders a new Security or
Securities equal in principal amount to any unpurchased portion of the Security
surrendered as requested by the Holder. Any Security not accepted for payment
shall be promptly mailed or delivered by the Company to the Holder thereof.

                  (c) A "Change of Control" will be deemed to have occurred at
such time as either

                           (a) any Person or any Persons acting together
that would constitute a "group" (a "Group") for purposes of Section 13(d) of the
Exchange Act, or any successor provision thereto (other than Eagle River, Mr.
Craig O. McCaw and their respective Affiliates or an underwriter engaged in a
firm commitment underwriting on behalf of the Company), shall beneficially own
(within the meaning of Rule 13d-3 under the Exchange Act, or any successor
provision thereto) more than 50% of the aggregate voting power of all classes of
Voting Stock of the Company; or

                           (b) neither Mr. Craig O. McCaw nor any person
designated by him to the Company as acting on his behalf
shall be a director of the Company; or

                           (c) during any period of two consecutive
years, individuals who at the beginning of such period constituted the Board of
Directors (together with any new directors whose election by the Board of
Directors or whose nomination for election by the shareholders of the Company
was proposed by a vote of a majority of the directors of the Company then still
in office who were either directors at

                                     -109-
<PAGE>

the beginning of such period or whose election or nomination for election was
previously so approved) cease for any reason to constitute a majority of the
Board of Directors then in office.

                  (d) In the event that the Company makes an Offer to Purchase
the Securities, the Company intends to comply with any applicable securities
laws and regulations, including any applicable requirements of Section 14(e) of,
and Rule 14e-1 under, the Exchange Act.

                  (e) Unless the Company defaults in the payment of the Purchase
Price, any Security accepted for payment pursuant to an Offer to Purchase shall
cease to accrue interest after the Purchase Date.

SECTION 1017.  PROVISION OF FINANCIAL INFORMATION.

                  The Company has agreed to file with the Trustee, within 15
days after it files them with the Commission, copies of the SEC Reports. In the
event the Company shall cease to be required to file SEC Reports pursuant to the
Exchange Act, the Company will nevertheless continue to file such reports with
the Commission (unless the Commission will not accept such a filing) and the
Trustee. The Company will furnish copies of the SEC Reports to the Holders of
Securities at the time the Company is required to file the same with the Trustee
and will make such information available to investors who request it in writing.

SECTION 1018.  STATEMENT BY OFFICERS AS TO DEFAULT.

                  (a) The Company will deliver to the Trustee, within 90 days
after the end of each quarter of each fiscal year of the Company ending after
the date hereof, an Officers' Certificate, stating whether or not to the best
knowledge of the signers thereof the Company is in default in the performance
and observance of any of the terms, provisions and conditions of this Indenture
and if the Company shall be in default, specifying all such defaults and the
nature and status thereof of which they may have knowledge.

                  (b) The Company shall deliver to the Trustee, as soon as
possible and in any event within 10 days after the Company becomes aware of the
occurrence of a Default or an Event of Default, an Officers' Certificate setting
forth the details of such Default or Event of Default and the action which the
Company proposes to take with respect thereto.

                                     -110-
<PAGE>

SECTION 1019.  WAIVER OF CERTAIN COVENANTS.

                  The Company may omit in any particular instance to comply with
any covenant or condition set forth in Sections 1004 to 1017, inclusive, if
before or after the time for such compliance the Holders of at least a majority
in aggregate principal amount of the Outstanding Securities shall, by Act of
such Holders, either waive such compliance in such instance or generally waive
compliance with such covenant or condition, but no such waiver shall extend to
or affect such covenant or condition except to the extent so expressly waived,
and, until such waiver shall become effective, the obligations of the Company
and the duties of the Trustee in respect of any such covenant or condition shall
remain in full force and effect.

SECTION 1020.  LIMITATION ON USE OF PROCEEDS.

                  The Company will apply all except $150,000,000 of the net
proceeds received from the issuance and sale of the Securities (the "Securities
Net Proceeds") toward the construction, improvement, and acquisition by the
Company or one or more Restricted Subsidiaries of the Company or Joint Ventures
of Telecommunications Assets of the Company, such Restricted Subsidiaries or
Joint Ventures (or will advance such net proceeds to such Restricted
Subsidiaries of the Company or Joint Ventures for such purpose); provided,
however, pending such application, the Securities Net Proceeds may be invested
in Marketable Securities.

                                 ARTICLE ELEVEN

                            Redemption of Securities

SECTION 1101.  RIGHT OF REDEMPTION.

                  (a) The Securities may be redeemed on or prior to December 1,
2002 only in the event that on or before December 1, 2002 the Company receives
net proceeds from a sale of its Common Equity, in which case the Company may, at
its option, use all or a portion of any such net proceeds to redeem Securities
in a principal amount of up to an aggregate amount equal to 33 1/3% of the
original principal amount of the Securities at a Redemption Price of 110.50% of
their principal amount plus accrued and unpaid interest, if any, to but
excluding the Redemption Date (subject to the

                                     -111-
<PAGE>

right of Holders of record on the relevant Regular Record Date to receive
interest due on an Interest Payment Date that is on or prior to the Redemption
Date); PROVIDED, HOWEVER, that Securities in an amount equal to at least 66 2/3%
of the original aggregate principal amount of the Notes remain outstanding after
such redemption and such redemption occurs on a Redemption Date within 90 days
of any such sale of the Company's Common Equity and upon not less than 30 nor
more than 60 days' notice by mail to each Holder of Securities to be redeemed at
such Holder's address appearing in the Security Register. The Company may only
redeem the Securities in amounts of $1,000 or an integral multiple of $1,000.

                  (b) The Securities further may be redeemed, as a whole or in
part, at the election of the Company, at any time on or after December 1, 2004
and prior to maturity, upon not less than 30 nor more than 60 days' notice by
mail to each Holder of Securities to be redeemed at such Holder's address
appearing in the Security Register, in amounts of $1,000 or an integral multiple
of $1,000, at the Redemption Prices specified in the form of Security
hereinbefore set forth, together with accrued and unpaid interest to, but
excluding, the Redemption Date (subject to the right of Holders of record on the
relevant Regular Record Date to receive interest due on an Interest Payment Date
that is on or prior to the Redemption Date).

SECTION 1102.  APPLICABILITY OF ARTICLE.

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

SECTION 1103.  ELECTION TO REDEEM; NOTICE TO TRUSTEE.

                  The election of the Company to redeem any Securities pursuant
to Section 1101 shall be evidenced by Board Resolution. In case of any
redemption at the election of the Company of less than all the Securities, the
Company shall, at least 60 days prior to the Redemption Date fixed by the
Company (unless a shorter notice shall be satisfactory to the Trustee), notify
the Trustee in writing of such Redemption Date and of the principal amount of
Securities to be redeemed. In the case of any redemption of Securities prior to
the expiration of any restriction on such redemption provided in the terms of
such Securities or elsewhere

                                     -112-
<PAGE>

in this Indenture, the Company shall furnish the Trustee with an Officers'
Certificate evidencing compliance with such restriction.

SECTION 1104.  SECURITIES TO BE REDEEMED PRO RATA.

                  If less than all the Securities are to be redeemed in any
redemption, the Securities to be redeemed shall be selected by the Trustee by
prorating, as nearly as may be practicable, the principal amount of Securities
to be redeemed. In any proration pursuant to this Section, the Trustee shall
make such adjustments, reallocations and eliminations as it shall deem proper
(and in compliance with the requirements of the principal national securities
exchange, if any, on which the Securities are listed) to the end that the
principal amount of Securities so prorated shall be $1,000 or a multiple
thereof, by increasing or decreasing or eliminating the amount which would be
allocable to any Holder on the basis of exact proportion by an amount not
exceeding $1,000. The Trustee in its discretion may determine the particular
Securities (if there are more than one) registered in the name of any Holder
which are to be redeemed, in whole or in part.

                  The Trustee shall promptly notify the Company and each
Security Registrar (other than the Trustee) in writing of the Securities
selected for redemption and, in the case of any Securities selected for partial
redemption, the principal amount thereof to be redeemed.

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

SECTION 1105.  NOTICE OF REDEMPTION.

                  Notice of redemption shall be given by first-class mail,
postage prepaid, mailed not less than 30 nor more than 60 days prior to the
Redemption Date, to each Holder of Securities to be redeemed, at such Holder's
address appearing in the Security Register.

                                     -113-
<PAGE>

                  All notices of redemption shall state:

                  (1)  the Redemption Date,

                  (2)  the Redemption Price,

                  (3) whether the redemption is being made pursuant to Section
         1101(a) or (b) and, if being made pursuant to Section 1101(a), a brief
         statement setting forth the Company's right to effect such redemption
         and the Company's basis therefor,

                  (4) if less than all the Outstanding Securities are to be
         redeemed, the identification (and, in the case of partial redemption of
         any Securities, the principal amounts) of the particular Securities to
         be redeemed,

                  (5) that on the Redemption Date the Redemption Price will
         become due and payable upon each such Security to be redeemed and that
         interest thereon will cease to accrue on and after said date,

                  (6) the place or places where such Securities are to be
         surrendered for payment of the Redemption Price,

                  (7) that in the case that a Security is only redeemed in part,
         the Company shall execute and the Trustee shall authenticate and
         deliver to the Holder of such Security without service charge, a new
         Security or Securities in an aggregate amount equal to the unredeemed
         portion of the Security,

                  (8) the aggregate principal amount of Securities being
         redeemed, and

                  (9) the CUSIP number or numbers of the Securities being
         redeemed.

                  Notice of redemption of Securities to be redeemed at the
election of the Company shall be given by the Company or, if request is made to
the Trustee no less than 35 days prior to the Redemption Date, by the Trustee in
the name and at the expense of the Company.

SECTION 1106.  DEPOSIT OF REDEMPTION PRICE.

                  Prior to any Redemption Date, the Company shall deposit with
the Trustee or with a Paying Agent (or, if the

                                     -114-
<PAGE>

Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) an amount of money sufficient to pay the Redemption
Price of, and (except if the Redemption Date shall be an Interest Payment Date)
accrued and unpaid interest on, all the Securities which are to be redeemed on
that date.

SECTION 1107.  SECURITIES PAYABLE ON REDEMPTION DATE.

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

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

SECTION 1108.  SECURITIES REDEEMED IN PART.

                  Any Security which is to be redeemed only in part shall be
surrendered at an office or agency of the Company designated for that purpose
pursuant to Section 1002 (with, if the Company or the Trustee so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the
Company and the Trustee duly executed by, the Holder thereof or his attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and deliver to the Holder of such Security without service
charge, a new Security or Securities of like tenor, of any authorized
denomination as requested by such Holder, in aggregate principal amount equal to
and in exchange for the unredeemed portion of the principal of the Security so
surrendered. If a Global Security is so surrendered, such new Security shall
also be a Global Security.

                                     -115-
<PAGE>

                                 ARTICLE TWELVE

                       Defeasance and Covenant Defeasance

SECTION 1201.  COMPANY'S OPTION TO EFFECT DEFEASANCE OR
               COVENANT DEFEASANCE.

                  The Company may, at its option by Board Resolution at any time
(subject to 10-day prior written notification to the Trustee), elect to have
either Section 1202 or Section 1203 applied to the Outstanding Securities upon
compliance with the conditions set forth below in this Article Twelve.

SECTION 1202.  DEFEASANCE AND DISCHARGE.

                  Upon the Company's exercise of the option provided in Section
1201 applicable to this Section, the Company shall be deemed to have been
discharged from its obligations with respect to the Outstanding Securities on
the date the conditions set forth below are satisfied (hereinafter,
"defeasance"). For this purpose, such defeasance means that the Company shall be
deemed to have paid and discharged the entire indebtedness represented by the
Outstanding Securities and to have satisfied all its other obligations under
such Securities and this Indenture insofar as such Securities are concerned (and
the Trustee, at the expense of the Company, shall execute proper instruments
acknowledging the same), except for the following which shall survive until
otherwise terminated or discharged hereunder:

         (A) the rights of Holders of Outstanding Securities to receive, solely
from the trust fund described in Section 1204 and as more fully set forth in
such Section, payments in respect of the principal of (and premium, if any) and
interest on such Securities when such payments are due,

         (B) the Company's obligations with respect to such Securities under
Sections 304, 305, 306, 1002 and 1003,

         (C) the rights, powers, trusts, duties and immunities of the Trustee
hereunder and

         (D) this Article Twelve. Subject to compliance with this Article
Twelve, the Company may exercise its option under this Section 1202
notwithstanding the prior exercise of its option under Section 1203.

                                     -116-
<PAGE>

SECTION 1203.  COVENANT DEFEASANCE.

                  Upon the Company's exercise of the option provided
in Section 1201 applicable to this Section

                           (i) the Company shall be released from its
obligations under Sections 1005 through 1017, inclusive, and
Clauses (3) and (4) of Section 801,

                           (ii) the occurrence of an event specified in
Sections 501(3), 501(4) (with respect to Clauses (3) and (4) of Section 801),
and 501 (5) (with respect to Sections 1005 through 1017, inclusive) shall not be
deemed to be an Event of Default, on and after the date the conditions set forth
below are satisfied (hereinafter, "covenant defeasance"). For this purpose, such
covenant defeasance means that the Company may omit to comply with and shall
have no liability in respect of any term, condition or limitation set forth in
any such Section or Article, whether directly or indirectly by reason of any
reference elsewhere herein to any such Section or Article or by reason of any
reference in any such Section or Article to any other provision herein or in any
other document, but the remainder of this Indenture and such Securities shall be
unaffected thereby.

SECTION 1204.  CONDITIONS TO DEFEASANCE OR
               COVENANT DEFEASANCE.

                  The following shall be the conditions to application of either
Section 1202 or Section 1203 to the Outstanding Securities:

                  (1) The Company shall irrevocably have deposited or caused to
         be deposited with the Trustee as trust funds in trust for the purpose
         of making the following payments, specifically pledged as security for,
         and dedicated solely to, the benefit of the Holders of such Securities,

                           (A) money in an amount, or

                           (B) U.S. Government Obligations which through the
scheduled payment of principal and interest in respect thereof in accordance
with their terms will provide, not later than one day before the due date of any
payment, money in an amount, or

                           (C) a combination thereof, sufficient, in the
opinion of a nationally recognized firm of independent

                                     -117-
<PAGE>

certified public accountants expressed in a written certification thereof
delivered to the Trustee, to pay and discharge, and which shall be applied by
the Trustee to pay and discharge, the principal of, premium, if any, and each
installment of interest on the Securities on the Stated Maturity of such
principal or installment of interest on the day on which such payments are due
and payable in accordance with the terms of this Indenture and of such
Securities. For this purpose, "U.S. Government Obligations" means securities
that are

         (x) direct obligations of the United States of America for the payment
of which its full faith and credit is pledged or

         (y) obligations of a Person controlled or supervised by and acting as
an agency or instrumentality of the United States of America the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America, which, in either case, are not callable or redeemable
at the option of the issuer thereof, and shall also include a depositary receipt
issued by a bank (as defined in Section 3(a)(2) of the Securities Act) as
custodian with respect to any such U.S. Government Obligation or a specific
payment of principal of or interest on any such U.S. Government Obligation held
by such custodian for the account of the holder of such depositary receipt,
PROVIDED that (except as required by law) such custodian is not authorized to
make any deduction from the amount payable to the holder of such depositary
receipt from any amount received by the custodian in respect of the U.S.
Government Obligation or the specific payment of principal of or interest on the
U.S. Government Obligation evidenced by such depositary receipt.

                  (2) No Default or Event of Default shall have occurred and be
         continuing on the date of such deposit or, insofar as subsections
         501(8) and (9) are concerned, at any time during the period ending on
         the 91st day after the date of such deposit (it being understood that
         this condition shall not be deemed satisfied until the expiration of
         such period).

                  (3) Such defeasance or covenant defeasance shall not cause the
         Trustee to have a conflicting interest as defined in Section 608 and
         for purposes of the Trust Indenture Act with respect to any securities
         of the Company.

                                     -118-
<PAGE>

                  (4) Such defeasance or covenant defeasance shall not result in
         a breach or violation of, or constitute a default under, this Indenture
         or any other agreement or instrument to which the Company is a party or
         by which it is bound.

                  (5) The Company shall have delivered to the Trustee an
         Officers' Certificate and an Opinion of Counsel, each stating that all
         conditions precedent provided for relating to either the defeasance
         under Section 1202 or the covenant defeasance under Section 1203 (as
         the case may be) have been complied with.

                  (6) In the case of an election under Section 1202, the Company
         shall have delivered to the Trustee an Opinion of Counsel stating that

         (x) the Company has received from, or there has been published by, the
Internal Revenue Service a ruling, or

         (y) since the date of this Indenture there has been a change in the
applicable Federal income tax law, in either case to the effect that, and based
thereon such opinion shall confirm that, the Holders of the Outstanding
Securities will not recognize income, gain or loss for Federal income tax
purposes as a result of such deposit, defeasance and discharge and will be
subject to Federal income tax on the same amounts, in the same manner and at the
same times as would have been the case if such deposit, defeasance and discharge
had not occurred.

                  (7) In the case of an election under Section 1203, the Company
         shall have delivered to the Trustee an Opinion of Counsel to the effect
         that the Holders of the Outstanding Securities will not recognize
         income, gain or loss for Federal income tax purposes as a result of
         such deposit and covenant defeasance and will be subject to Federal
         income tax on the same amounts, in the same manner and at the same
         times as would have been the case if such covenant defeasance had not
         occurred.

                  (8) The Company shall have delivered to the Trustee an Opinion
         of Counsel to the effect that such deposit and defeasance or covenant
         defeasance shall not result in the trust arising from such deposit
         constituting an investment company as defined in the Investment Company
         Act of 1940, as amended, or such trust shall be qualified under such
         act or exempt from regulation thereunder.

                                     -119-
<PAGE>

SECTION 1205.  DEPOSITED MONEY AND U.S. GOVERNMENT
               OBLIGATIONS TO BE HELD IN TRUST;
               OTHER MISCELLANEOUS PROVISIONS.

                  Subject to the provisions of the last paragraph of Section
1003, all money and U.S. Government Obligations (including the proceeds thereof)
deposited with the Trustee (or other qualifying trustee--collectively, for
purposes of this Section 1205, the "Trustee") pursuant to Section 1204 in
respect of the Securities shall be held in trust and applied by the Trustee, in
accordance with the provisions of such Securities and this Indenture, to the
payment, either directly or through any Paying Agent (including the Company
acting as its own Paying Agent) as the Trustee may determine, to the Holders of
such Securities, of all sums due and to become due thereon in respect of
principal (and premium, if any) and interest, but such money need not be
segregated from other funds except to the extent required by law.

                  The Company shall pay and indemnify the Trustee against any
tax, fee or other charge imposed on or assessed against the U.S. Government
Obligations deposited pursuant to Section 1204 or the principal and interest
received in respect thereof other than any such tax, fee or other charge which
by law is for the account of the Holders of the Outstanding Securities.

                  Anything in this Article Twelve to the contrary
notwithstanding, the Trustee shall deliver or pay to the Company from time to
time upon Company Request any money or U.S. Government Obligations held by it as
provided in Section 1204 which, in the opinion of a nationally recognized
accounting firm expressed in a written certification thereof delivered to the
Trustee, are in excess of the amount thereof which would then be required to be
deposited to effect an equivalent defeasance or covenant defeasance.

SECTION 1206.  REINSTATEMENT.

                  If the Trustee or the Paying Agent is unable to apply any
money in accordance with Section 1202 or 1203 by reason of any order or judgment
of any court or governmental authority enjoining, restraining or otherwise
prohibiting such application, then the Company's obligations under this
Indenture and the Securities shall be revived and reinstated as though no
deposit had occurred pursuant to this Article Twelve until such time as the
Trustee or Paying Agent is permitted to apply all such money in accordance with
Section

                                     -120-
<PAGE>

1202 and 1203; PROVIDED, HOWEVER, that if the Company makes any payment of
principal of (and premium, if any) any Security following the reinstatement of
its obligations, the Company shall be subrogated to the rights of the Holders of
such Securities to receive such payment from the money held by the Trustee or
the Paying Agent.

SECTION 1207.  REPAYMENT TO COMPANY.

                  Any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of, premium,
if any, or interest on any Security and remaining unclaimed for two years after
such principal, and premium, if any, or interest has become due and payable
shall be paid to the Company on its written request or (if then held by the
Company) shall be discharged from such trust; and the Holder of such security
shall thereafter, as a creditor, look only to the Company for payment thereof,
and all liability of the Trustee or such Paying Agent with respect to such trust
money, and all liability of the Company as trustee thereof, shall thereupon
cease; PROVIDED, HOWEVER, that the Trustee or such Paying Agent, before being
required to make any such repayment, may at the expense of the Company cause to
be published once, in the New York Times and The Wall Street Journal (national
edition), notice that such money remains unclaimed and that, after a date
specified therein, which shall not be less than 30 days from the date of such
notification or publication, any unclaimed balance of such money then remaining
will be repaid to the Company.

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

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

                                     -121-
<PAGE>

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

                                            NEXTLINK Communications, Inc.

                                            By /s/  R. Bruce Easter, Jr.
                                              ----------------------------------
                                              Name: R. Bruce Easter, Jr.
                                              Title: Vice President, General
                                                         Counsel and Secretary

Attest:

/s/ Richard A. Montfort, Jr.
-------------------------------------
Name: Richard A. Montfort, Jr.
Title: Assistant Secretary

                                            UNITED STATES TRUST COMPANY
                                             OF NEW YORK

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

[SEAL]

Attest:

----------------------------------
Name:
Title:

<PAGE>

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

                                            NEXTLINK Communications, Inc.

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

Attest:

-------------------------------------
Name:
Title:

                                            UNITED STATES TRUST COMPANY
                                             OF NEW YORK

                                            By /s/ Gerard F. Ganey
                                               ---------------------------------
                                              Name: Gerard F. Ganey
                                              Title: Authorized Signatory

[SEAL]

Attest:

/s/ Patricia Gallagher
----------------------------------
Name: Patricia Gallagher
Title: Authorized Signatory

<PAGE>

STATE OF WASHINGTON  )
                         ss.:
COUNTY OF KING       )

                  On this __th day of November, 1999, before me personally
appeared R. Bruce Easter, Jr., to me known, who, being duly sworn, did depose
and say that he/she is the Vice President of NEXTLINK Communications, Inc.,
one of the corporations described in and which executed the foregoing
instrument, and duly acknowledged to me that he/she executed the same by
authority of the Board of Directors of said corporation.

                                                  /s/ Kirsten P. Abboud
                                                  ------------------------------
                                                      Notary Public
-------------------
 KIRSTEN P. ABBOUD
   NOTARY PUBLIC
STATE OF WASHINGTON
COMMISSION EXPIRES
  AUGUST 19, 2002
-------------------

STATE OF NEW YORK  )
                       ss.:
COUNTY OF NEW YORK )

                  On this __th day of November, 1999, before me personally
appeared ____________, to me known, who, being duly sworn, did depose and say
that he/she is the _______________ of United States Trust Company of New
York, one of the corporations described in and which executed the foregoing
instrument, and duly acknowledged to me that he/she executed the same by
authority of the Board of Directors of said corporation.

                                                  ------------------------------
                                                        Notary Public

<PAGE>

STATE OF WASHINGTON  )
                         ss.:
COUNTY OF            )

                  On this __th day of November, 1999, before me personally
appeared _______________, to me known, who, being duly sworn, did depose and
say that he/she is the _____________ of NEXTLINK Communications, Inc., one of
the corporations described in and which executed the foregoing instrument,
and duly acknowledged to me that he/she executed the same by authority of the
Board of Directors of said corporation.

                                                  ------------------------------
                                                      Notary Public

STATE OF NEW YORK  )
                       ss.:
COUNTY OF NEW YORK )

                  On this 17th day of November, 1999, before me personally
appeared GERARD F. GANEY, to me known, who, being duly sworn, did depose and
say that he/she is the AUTHORIZED SIGNATORY of United States Trust Company of
New York, one of the corporations described in and which executed the
foregoing instrument, and duly acknowledged to me that he/she executed the
same by authority of the Board of Directors of said corporation.

                                                  /s/ Christopher Grell
                                                  ------------------------------
                                                        Notary Public

                                                        CHRISTOPHER GRELL
                                                NOTARY PUBLIC, STATE OF NEW YORK
                                                         NO. 01GR5012466
                                                  QUALIFIED IN NEW YORK COUNTY
                                                COMMISSION EXPIRES JUNE 15, 2001

<PAGE>

                                                        ANNEX A -- Form of
                                                        Regulation S Certificate

                            REGULATION S CERTIFICATE

           (For transfers pursuant to Section 305(b)(i), (iii) and (v)
                                of the Indenture)

United States Trust Company of New York,
  as Trustee
114 West 47th Street, 25th Floor
New York, New York  10036
Attention:  Corporate Trust Trustee Administration

         Re:      10 1/2% Senior Notes due 2009
                  of NEXTLINK Communications, Inc.
                  (the "Securities")
                  --------------------------------

                  Reference is made to the Indenture, dated as of November 17,
1999 (the "Indenture"), between NEXTLINK Communications, Inc. (the "Company")
and United States Trust Company of New York, as Trustee. Terms used herein and
defined in the Indenture or in Regulation S or Rule 144 under the U.S.
Securities Act of 1933, as amended (the "Securities Act") are used herein as so
defined.

                  This certificate relates to U.S. $____________ principal
amount of Securities, which are evidenced by the following certificate(s) (the
"Specified Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial owners
of the Specified Securities and is duly authorized by them to do so. Such
beneficial owner or owners are referred to herein collectively as the "Owner".
If the Specified Securities are represented by a Global Security, they are held
through the Depositary or an Agent Member in the name of the Undersigned, as or
on behalf of the Owner. If the Specified Securities are not represented by a
Global Security, they are registered in the name of the Undersigned, as or on
behalf of the Owner.

                                       A-1

<PAGE>

                  The Owner has requested that the Specified Securities be
transferred to a person (the "Transferee") who will take delivery in the form of
a Regulation S Security. In connection with such transfer, the Owner hereby
certifies that, unless such transfer is being effected pursuant to an effective
registration statement under the Securities Act, it is being effected in
accordance with Rule 904 or Rule 144 under the Securities Act and with all
applicable securities laws of the states of the United States and other
jurisdictions. Accordingly, the Owner hereby further certifies as follows:

                  (1) RULE 904 TRANSFERS. If the transfer is being effected in
         accordance with Rule 904:

                           (A) the Owner is not a distributor of the Securities,
                  an affiliate of the Company or any such distributor or a
                  person acting on behalf of any of the foregoing;

                           (B) the offer of the Specified Securities was not
                  made to a person in the United States;

                           (C) either:

                                    (i) at the time the buy order was
                           originated, the Transferee was outside the United
                           States or the Owner and any person acting on its
                           behalf reasonably believed that the Transferee was
                           outside the United States, or

                                    (ii) the transaction is being executed in,
                           on or through the facilities of the Eurobond market,
                           as regulated by the Association of International Bond
                           Dealers, or another designated offshore securities
                           market and neither the Owner nor any person acting on
                           its behalf knows that the transaction has been
                           prearranged with a buyer in the United States;

                           (D) no directed selling efforts have been made in the
                  United States by or on behalf of the Owner or any affiliate
                  thereof;

                           (E) if the Owner is a dealer in securities or has
                  received a selling concession, fee or other remuneration in
                  respect of the Specified Securities, and the transfer is to
                  occur during

                                       A-2

<PAGE>

                  the Restricted Period, then the requirements of
                  Rule 904(c)(1) have been satisfied; and

                           (F) the transaction is not part of a plan or scheme
                  to evade the registration requirements of the Securities Act.

                  (2) RULE 144 TRANSFERS. If the transfer is being effected
         pursuant to Rule 144:

                           (A) the transfer is occurring after a holding period
                  of at least one year (computed in accordance with paragraph
                  (d) of Rule 144) has elapsed since the Specified Securities
                  were last acquired from the Company or from an affiliate of
                  the Company, whichever is later, and is being effected in
                  accordance with the applicable amount, manner of sale and
                  notice requirements of Rule 144; or

                           (B) the transfer is occurring after a holding period
                  of at least two years has elapsed since the Specified
                  Securities were last acquired from the Company or from an
                  affiliate of the Company, whichever is later, and the Owner is
                  not, and during the preceding three months has not been, an
                  affiliate of the Company.

                  This certificate and the statements contained herein are made
for your benefit and the benefit of the Company and the Purchasers.

Dated:
                          -------------------------------------------
                           (Print the name of the Undersigned,
                           as such term is defined in the
                           second paragraph of this certificate.)

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

                           (If the Undersigned is a corporation, partnership or
                           fiduciary, the title of the person signing on behalf
                           of the Undersigned must be stated.)

                                       A-3

<PAGE>

                                                   ANNEX B -- Form of Restricted
                                                   Securities Certificate

                        RESTRICTED SECURITIES CERTIFICATE

       (For transfers pursuant to Section 305(b)(ii), (iii), (iv) and (v)
                                of the Indenture)

United States Trust Company of New York,
  as Trustee
114 West 47th Street, 25th Floor
New York, New York 10036
Attention:  Corporate Trust Trustee Administration

         Re:      10 1/2% Senior Notes due 2009
                  of NEXTLINK Communications, Inc.
                  (the "Securities")
                  --------------------------------

                  Reference is made to the Indenture, dated as of November 17,
1999 (the "Indenture"), between NEXTLINK Communications, Inc. (the "Company")
and United States Trust Company of New York, as Trustee. Terms used herein and
defined in the Indenture or in Regulation S or Rule 144 under the U.S.
Securities Act of 1933, as amended (the "Securities Act") are used herein as so
defined.

                  This certificate relates to U.S. $_____________ principal
amount of Securities, which are evidenced by the following certificate(s) (the
"Specified Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial owners
of the Specified Securities and is duly authorized by them to do so. Such
beneficial owner or owners are referred to herein collectively as the "Owner".
If the Specified Securities are represented by a Global Security, they are held
through the Depositary or an Agent Member in the name of the Undersigned, as or
on behalf of the Owner. If the Specified Securities are not represented by a
Global Security, they are registered in the name of the Undersigned, as or on
behalf of the Owner.

                  The Owner has requested that the Specified Securities be
transferred to a person (the "Transferee") who will take delivery in the form of
a Restricted Security. In

                                       B-1

<PAGE>

connection with such transfer, the Owner hereby certifies that, unless such
transfer is being effected pursuant to an effective registration statement under
the Securities Act, it is being effected in accordance with Rule 144A or Rule
144 under the Securities Act and all applicable securities laws of the states of
the United States and other jurisdictions. Accordingly, the Owner hereby further
certifies as follows:

                  (1) RULE 144A TRANSFERS. If the transfer is being effected in
         accordance with Rule 144A:

                           (A) the Specified Securities are being transferred to
                  a person that the Owner and any person acting on its behalf
                  reasonably believe is a "qualified institutional buyer" within
                  the meaning of Rule 144A, acquiring for its own account or for
                  the account of a qualified institutional buyer; and

                           (B) the Owner and any person acting on its behalf
                  have taken reasonable steps to ensure that the Transferee is
                  aware that the Owner may be relying on Rule 144A in connection
                  with the transfer; and

                  (2) RULE 144 TRANSFERS. If the transfer is being effected
         pursuant to Rule 144:

                           (A) the transfer is occurring after a holding period
                  of at least one year (computed in accordance with paragraph
                  (d) of Rule 144) has elapsed since the Specified Securities
                  were last acquired from the Company or from an affiliate of
                  the Company, whichever is later, and is being effected in
                  accordance with the applicable amount, manner of sale and
                  notice requirements of Rule 144; or

                           (B) the transfer is occurring after a holding period
                  of at least two years has elapsed since the Specified
                  Securities were last acquired from the Company or from an
                  affiliate of the Company, whichever is later, and the Owner is
                  not, and during the preceding three months has not been, an
                  affiliate of the Company.

                                       B-2

<PAGE>

                  This certificate and the statements contained herein are made
for your benefit and the benefit of the Company and the Purchasers.

Dated:
                          -------------------------------------------
                           (Print the name of the Undersigned,
                           as such term is defined in the
                           second paragraph of this certificate.)

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

                           (If the Undersigned is a corporation, partnership or
                           fiduciary, the title of the person signing on behalf
                           of the Undersigned must be stated.)

                                       B-3

<PAGE>

                                                 ANNEX C -- Form of Unrestricted
                                                 Securities Certificate

                       UNRESTRICTED SECURITIES CERTIFICATE

       (For removal of Securities Act Legends pursuant to Section 305(c))

United States Trust Company of New York,
  as Trustee
114 West 47th Street, 25th Floor
New York, New York 10036
Attention:  Corporate Trust Trustee Administration

         Re:      10 1/2% Senior Notes due 2009
                  of NEXTLINK Communications, Inc.
                  (the "Securities")
                  --------------------------------

                  Reference is made to the Indenture, dated as of November 17,
1999 (the "Indenture"), between NEXTLINK Communications, Inc. (the "Company")
and United States Trust Company of New York, as Trustee. Terms used herein and
defined in the Indenture or in Regulation S or Rule 144 under the U.S.
Securities Act of 1933, as amended (the "Securities Act") are used herein as so
defined.

                  This certificate relates to U.S. $_____________ principal
amount of Securities, which are evidenced by the following certificate(s) (the
"Specified Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial owners
of the Specified Securities and is duly authorized by them to do so. Such
beneficial owner or owners are referred to herein collectively as the "Owner".
If the Specified Securities are represented by a Global Security, they are held
through the Depositary or an Agent Member in the name of the Undersigned, as or
on behalf of the Owner. If the Specified Securities are not represented by a
Global Security, they are registered in the name of the Undersigned, as or on
behalf of the Owner.

                  The Owner has requested that the Specified Securities be
exchanged for Securities bearing no Securities Act Legend pursuant to Section
305(c) of the Indenture. In connection with such exchange, the Owner hereby
certifies

                                       C-1

<PAGE>

that the exchange is occurring after a holding period of at least two years
(computed in accordance with paragraph (d) of Rule 144) has elapsed since the
Specified Securities were last acquired from the Company or from an affiliate of
the Company, whichever is later, and the Owner is not, and during the preceding
three months has not been, an affiliate of the Company. The Owner also
acknowledges that any future transfers of the Specified Securities must comply
with all applicable securities laws of the states of the United States and other
jurisdictions.

                  This certificate and the statements contained herein are made
for your benefit and the benefit of the Company and the Purchasers.

Dated:
                          -------------------------------------------
                           (Print the name of the Undersigned,
                           as such term is defined in the
                           second paragraph of this certificate.)

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

                           (If the Undersigned is a corporation, partnership or
                           fiduciary, the title of the person signing on behalf
                           of the Undersigned must be stated.)

                                       C-2

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