Document:

<PAGE>

                                                                  Execution Copy

                                                                     Exhibit 4.1
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                         LEVEL 3 COMMUNICATIONS, INC.,

                                    Issuer

                                      to

                             THE BANK OF NEW YORK,

                                  as Trustee

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                           Euro Securities Indenture

                         Dated as of February 29, 2000

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                                (Euro)500,000,000

                      10 3/4% Senior Euro Notes Due 2008

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<PAGE>

                               TABLE OF CONTENTS

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

      ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.  Definitions..................................................    2
              Accreted Value...............................................    3
              Acquired Debt................................................    3
              Act..........................................................    3
              Affiliate....................................................    3
              Affiliate Transaction........................................    4
              Agent Member.................................................    4
              Asset Disposition............................................    4
              Attributable Value...........................................    5
              Board of Directors...........................................    5
              Board Resolution.............................................    5
              Business Day.................................................    6
              Capital Lease Obligation.....................................    6
              Capital Stock................................................    6
              Cash Equivalents.............................................    6
              Change of Control............................................    7
              Change of Control Triggering Event...........................    7
              Clearstream..................................................    7

              Code.........................................................    7
              Commission...................................................    7
              Common Depositary............................................    7
              Common Stock.................................................    7
              Company......................................................    7
              Company Order................................................    7
              Consolidated Capital Ratio...................................    9
              Consolidated Cash Flow Available for
                Fixed Charges..............................................    9
              Consolidated Income Tax Expense..............................   10
              Consolidated Interest Expense................................   10
              Consolidated Net Income......................................   11
</TABLE>
<PAGE>

<TABLE>
              <S>                                                             <C>
              Consolidated Net Worth.......................................   12
              Consolidated Tangible Assets.................................   12
              Corporate Trust Office.......................................   12
              Credit Agreement.............................................   12
              Credit Facilities............................................   12
              Debt.........................................................   12
              Default......................................................   14
              Defaulted Interest...........................................   14
              Depository...................................................   14
              Designation..................................................   14
              Designation Amount...........................................   14
              Disqualified Stock...........................................   14
              Disqualified Stock Dividends.................................   14
              Dollar Notes.................................................   15
              Eligible Receivables.........................................   15
              euro.........................................................   15
              Euroclear....................................................   15
              Euro Notes...................................................   15
              European Government Obligation...............................   15
              European Union...............................................   15
              Event of Default.............................................   16
              Exchange Act.................................................   16
              Exchange Securities..........................................   16
              Excess Proceeds..............................................   16
              Existing Notes...............................................   16
              Expiration Date..............................................   16
              Fair Market Value............................................   16
              Federal Bankruptcy Code......................................   16
              Global Security..............................................   16
              Government Securities........................................   16
              Guarantee....................................................   17
              Guarantor....................................................   17
              Holder.......................................................   17
              Incur........................................................   17
              Indenture....................................................   18
              Initial Foreign Purchaser....................................   18

              Initial Purchasers...........................................   18
              Initial Securities...........................................   18
              Institutional Accredited Investor............................   18
              Institutional Accredited Investor Global Security............   18
              Interest Payment Date........................................   18
              Interest Rate or Currency Protection Agreement...............   19
              Invested Capital.............................................   19
              Investment...................................................   19
              Issue Date...................................................   20
              Issue Date Purchase Money Debt...............................   20
              Issue Date Rating............................................   20
</TABLE>

                                     (ii)
<PAGE>

<TABLE>
              <S>                                                             <C>
              Joint Venture................................................   20
              Lien.........................................................   20
              Maturity.....................................................   21
              Measurement Date.............................................   21
              Moody's......................................................   21
              Net Available Proceeds.......................................   21
              New Convertible Notes........................................   22
              9 1/8% Senior Notes..........................................   22
              Non-Global Purchasers........................................   22
              Offer........................................................   22
              Offer to Purchase............................................   23
              Officers' Certificate........................................   25
              Opinion of Counsel...........................................   26
              OECD.........................................................   26
              Outstanding..................................................   26
              Paying Agent.................................................   27
              Permitted Holders............................................   27
              Permitted Interest Rate or Currency
                Protection Agreement.......................................   27
              Permitted Investments........................................   28
              Permitted Liens..............................................   28
              Permitted Telecommunications Capital
                Asset Disposition..........................................   29
              Person.......................................................   29
              Physical Security............................................   29
              Predecessor Security.........................................   30
              Preferred Stock..............................................   30
              Preferred Stock Dividends....................................   30
              Private Exchange Offer.......................................   30
              Private Exchange Securities..................................   30
              Private Placement Legend.....................................   30
              Property.....................................................   30
              Proportionate Interest.......................................   31
              Purchase Amount..............................................   31
              Purchase Date................................................   31
              Purchase Money Debt..........................................   31
              Purchase Price...............................................   31
              Qualified Institutional Buyer or QIB.........................   31
              Qualified Receivable Facility................................   31
              Rating Agencies..............................................   32
              Rating Date..................................................   32
              Rating Decline...............................................   32
              Receivables..................................................   32
              refinancing..................................................   32
              Registered Exchange Offer....................................   32
              Registration Agreement.......................................   32
              Registration Default.........................................   33
              Regular Record Date..........................................   33
              Regulation S.................................................   33
              Regulation S Global Security.................................   33
</TABLE>

                                     (iii)
<PAGE>

<TABLE>
<S>                                                                           <C>
              Required Filing Dates........................................   33
              Responsible Officer..........................................   33
              Restricted Payment...........................................   33
              Restricted Subsidiary........................................   33
              Restricted Subsidiary Guarantee..............................   33
              Revocation...................................................   34
              Rule 144A....................................................   34
              Rule 144A Global Security....................................   34
              S&P..........................................................   34
              Sale and Leaseback Transaction...............................   34
              Securities...................................................   34
              Securities Act...............................................   34
              Security Register............................................   35
              Shelf Registration Statement.................................   35
              Significant Subsidiary.......................................   35
              6% Convertible Notes.........................................   35
              Special Assets...............................................   35
              Special Interest.............................................   35
              Special Record Date..........................................   35
              Stated Maturity..............................................   35
              Subordinated Debt............................................   36
              Subsidiary...................................................   36
              Telecommunications/IS Assets.................................   36
              Telecommunications/IS Business...............................   38
              10 1/2% Senior Discount Notes................................   38
              Trust Indenture Act or TIA...................................   38
              Trustee......................................................   38

              Unrestricted Subsidiary......................................   38
              Vice President...............................................   39
              Voting Stock.................................................   39
              Wholly Owned Subsidiary......................................   39
SECTION 102.  Compliance Certificates and Opinions.........................   39
SECTION 103.  Form of Documents Delivered to Trustee.......................   40
SECTION 104.  Acts of Holders..............................................   41
SECTION 105.  Notices, etc., to Trustee and Company........................   43
SECTION 106.  Notice to Holders; Waiver....................................   44
SECTION 107.  Effect of Headings and Table of
                Contents...................................................   44
SECTION 108.  Successors and Assigns.......................................   44
SECTION 109.  Separability Clause..........................................   45
SECTION 110.  Benefits of Indenture........................................   45
SECTION 111.  Governing Law................................................   45
SECTION 112.  Conflict with Trust Indenture Act............................   45
SECTION 113.  Legal Holidays...............................................   46
SECTION 114.  No Personal Liability of Directors,
                Officers, Employees and Stockholders.......................   46
SECTION 115.  Independence of Covenants....................................   46
SECTION 116.  Exhibits.....................................................   46
SECTION 117.  Counterparts.................................................   47
</TABLE>

                                     (iv)
<PAGE>

<TABLE>
<S>                                                                           <C>
SECTION 118.  Duplicate Originals..........................................   47

                           ARTICLE TWO SECURITY FORMS

SECTION 201. Forms Generally...............................................   47

                          ARTICLE THREE THE SECURITIES

SECTION 301.  Title and Terms..............................................   48
SECTION 302.  Denominations................................................   49
SECTION 303.  Execution, Authentication, Delivery and Dating...............   49
SECTION 304.  Temporary Securities.........................................   52
SECTION 305.  Registration, Registration of Transfer
                and Exchange...............................................   53
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.............   54
SECTION 307.  Payment of Interest; Interest Rights Preserved...............   55
SECTION 308.  Persons Deemed Owners........................................   57
SECTION 309.  Cancellation.................................................   58
SECTION 310.  Computation of Interest......................................   58
SECTION 311.  CUSIP Number.................................................   58
SECTION 312.  Book-Entry Provisions for Global
                Securities.................................................   59
SECTION 313.  Special Transfer Provisions..................................   62

                    ARTICLE FOUR SATISFACTION AND DISCHARGE

SECTION 401.   Satisfaction and Discharge of Indenture.....................   69
SECTION 402.   Application of Trust Money..................................   70

                             ARTICLE FIVE REMEDIES

SECTION 501.  Events of Default............................................   71
SECTION 502.  Acceleration of Maturity; Rescission and Annulment...........   73
SECTION 503.  Collection of Indebtedness and Suits
                for Enforcement by Trustee.................................   74
SECTION 504.  Trustee May File Proofs of Claim.............................   75
SECTION 505.  Trustee May Enforce Claims Without Possession of
                Securities.................................................   76
SECTION 506.  Application of Money Collected...............................   77
SECTION 507.  Limitation on Suits..........................................   77
SECTION 508.  Unconditional Right of Holders to Receive
                Principal, Premium and Interest............................   78
</TABLE>

                                      (V)
<PAGE>

<TABLE>
<S>                                                                           <C>
SECTION 509.  Restoration of Rights and Remedies...........................   78
SECTION 510.  Rights and Remedies Cumulative...............................   79
SECTION 511.  Delay or Omission Not Waiver.................................   79
SECTION 512.  Control by Holders...........................................   79
SECTION 513.  Waiver of Past Defaults......................................   80
SECTION 514.  Waiver of Stay or Extension Laws.............................   80

                                 ARTICLE SIX THE TRUSTEE

SECTION 601.  Certain Duties and Responsibilities..........................   81
SECTION 602.  Notice of Default............................................   82
SECTION 603.  Certain Rights of Trustee....................................   83
SECTION 604.  Trustee Not Responsible for Recitals or Issuance
                of Securities..............................................   85
SECTION 605.  May Hold Securities..........................................   85
SECTION 606.  Money Held in Trust..........................................   85
SECTION 607.  Compensation and Reimbursement...............................   85
SECTION 608.  Corporate Trustee Required; Eligibility;
                Conflicting Interests......................................   87
SECTION 609.  Resignation and Removal; Appointment of Successor............   87
SECTION 610.  Acceptance of Appointment by
                Successor..................................................   89
SECTION 611.  Merger, Conversion, Consolidation or Succession to
                Business...................................................   89

        ARTICLE SEVEN HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.  Disclosure of Names and Addresses of
                Holders....................................................   91
SECTION 702.  Reports by Trustee...........................................   91
SECTION 703.  Reports by Company...........................................   91

      ARTICLE EIGHT CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.  Company May Consolidate, etc., Only on Certain
                Terms......................................................   92
SECTION 802.  Successor Company Substituted................................   93
SECTION 803.  Guarantor May Consolidate, etc., Only on Certain
                Terms......................................................   94
SECTION 804.  Successor Guarantor Substituted..............................   96

                     ARTICLE NINE SUPPLEMENTAL INDENTURES

SECTION 901.  Supplemental Indentures Without Consent
</TABLE>

                                     (vi)

<PAGE>

<TABLE>
<S>                                                                           <C>
                of Holders.................................................   97

SECTION 902.    Supplemental Indentures With Consent of Holders............   98
SECTION 903.    Execution of Supplemental Indentures.......................   99
SECTION 904.    Effect of Supplemental Indentures..........................  100
SECTION 905.    Conformity with Trust Indenture Act........................  100
SECTION 906.    Reference in Securities to Supplemental Indentures.........  100
SECTION 907.    Notice of Supplemental Indentures..........................  100

                              ARTICLE TEN COVENANTS

SECTION 1001.  Payment of Principal, Premium, if any, and
                 Interest..................................................  101
SECTION 1002.  Maintenance of Office or Agency.............................  101
SECTION 1003.  Money for Security Payments to Be Held in Trust.............  102
SECTION 1004.  Corporate Existence.........................................  104
SECTION 1005.  Maintenance of Properties...................................  104
SECTION 1006.  Insurance...................................................  105
SECTION 1007.  Reports.....................................................  105
SECTION 1008.  Statement by Officers as to Default.........................  105
SECTION 1009.  Change of Control Triggering Event..........................  106
SECTION 1010.  Limitation on Consolidated Debt.............................  110
SECTION 1011.  Limitation on Debt of Restricted............................  115
                 Subsidiaries
SECTION 1012.  Limitation on Restricted Payments...........................  117
SECTION 1013.  Limitation on Dividend and Other
                 Payment Restrictions Affecting
                 Restricted Subsidiaries...................................  121
SECTION 1014.  Limitation on Liens.........................................  123
SECTION 1015.  Limitation on Sale and Leaseback
                 Transactions..............................................  125
SECTION 1016.  Limitation on Asset Dispositions............................  125
SECTION 1017.  Limitation on Issuance and Sales of
                 Capital Stock of Restricted
                 Subsidiaries .............................................  128
SECTION 1018.  Transactions with Affiliates................................  130
SECTION 1019.  Limitation on Designations of Unrestricted
                 Subsidiaries..............................................  132
</TABLE>

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES
                            [INTENTIONALLY OMITTED]

                                     (vii)
<PAGE>

<TABLE>
<S>                                                                          <C>
                ARTICLE TWELVE DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1201.  Company's Option to Effect Defeasance or Covenant
                 Defeasance................................................  135
SECTION 1202.  Defeasance and Discharge....................................  135
SECTION 1203.  Covenant Defeasance.........................................  137
SECTION 1204.  Conditions to Defeasance or Covenant Defeasance.............  137
SECTION 1205.  Deposited Money and Government Securities to Be
                 Held in Trust; Other Miscellaneous Provisions.............  140
SECTION 1206.  Reinstatement...............................................  140
</TABLE>

EXHIBIT A - Form of Security
EXHIBIT B - Form of Supplemental Indenture

                                    (viii)

<PAGE>

     EURO SECURITIES INDENTURE, dated as of February 29, 2000 between Level
3 Communications, Inc., a corporation duly organized and existing under the laws
of the State of Delaware (herein called the "Company"), having its principal
office at 1025 Eldorado Boulevard, Broomfield, Colorado 80021, and The Bank of
New York, a New York banking corporation, as Trustee (herein called the
"Trustee").

                            RECITALS OF THE COMPANY

     The Company has duly authorized the creation of an issue of 10 3/4%
Senior Euro Notes Due 2008 (the "Initial Securities") and, if and when issued
pursuant to a Registered Exchange Offer or Private Exchange Offer pursuant to
the Registration Agreement for the Initial Securities, 10 3/4% Senior Euro Notes
Due 2008 (the "Exchange Securities" and, together with the Initial Securities,
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.

     All things necessary have been done 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 each of the Company and the Trustee, in
accordance with their and its terms.

     NOW, THEREFORE, THIS INDENTURE WITNESSETH:
<PAGE>

                                                                               2

     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, including the recitals set forth
above, except as otherwise expressly provided or unless the context otherwise
requires:

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

          (b)  all other terms used herein which are defined in the Trust
     Indenture Act, either directly or by reference therein, have the meanings
     assigned to them therein;

          (c)  all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with generally accepted accounting
     principles, and, except as otherwise herein expressly provided, the term
     "generally accepted accounting principles" with respect to any computation
     required or permitted hereunder shall mean United States generally accepted
     accounting principles as in effect on the date of this Indenture;

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

          (e)  unless otherwise indicated, references to Articles, Sections,
     paragraphs or other subdivisions are references to such Articles, Sections,
     paragraphs or other subdivisions of this Indenture; and
<PAGE>

                                                                               3

          (f)  "or" is not exclusive and "including" means including without
     limitation.

     "Accreted Value" of any Debt issued at a price less than the principal
amount at stated maturity, means, as of any date of determination, an amount
equal to the sum of (a) the issue price of such Debt as determined in accordance
with Section 1273 of the Code or any successor provisions plus (b) the aggregate
of the portions of the original issue discount (the excess of the amounts
considered as part of the "stated redemption price at maturity" of such Debt
within the meaning of Section 1273(a)(2) of the Code or any successor
provisions, whether denominated as principal or interest, over the issue price
of such Debt) that shall theretofore have accrued pursuant to Section 1272 of
the Code (without regard to Section 1272(a)(7) of the Code) from the date of
issue of such Debt to the date of determination, minus all amounts theretofore
paid in respect of such Debt, which amounts are considered as part of the
"stated redemption price at maturity" of such Debt within the meaning of Section
1273(a)(2) of the Code or any successor provisions (whether such amounts paid
were denominated principal or interest).

     "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 Subsidiary of such specified Person and (ii) Debt
secured by a Lien encumbering any Property 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.

     "Affiliate" of any Person means any other Person directly or indirectly
controlling or controlled by or under direct or indirect common control with
such Person. For the purposes of this definition, "control" when used with
respect to any Person means the power to direct the management and policies of
such Person, directly or indirectly, whether through the ownership of voting
securities, by contract or otherwise; and the terms
<PAGE>

                                                                               4

"controlling" and "controlled" have meanings correlative to the foregoing. For
purposes of Sections 1016 and 1018 and the definition of "Telecommunications/IS
Assets" only, "Affiliate" shall also mean any beneficial owner of shares
representing 10% or more of the total voting power of the Voting Stock (on a
fully diluted basis) of the Company or of rights or warrants to purchase such
Voting Stock (whether or not currently exercisable) and any Person who would be
an Affiliate of any such beneficial owner pursuant to the first sentence hereof.

     "Affiliate Transaction" has the meaning specified in Section 1018

     "Agent Member" has the meaning specified in Section 312.

     "Asset Disposition" means any transfer, conveyance, sale, lease,
issuance or other disposition by the Company or any Restricted Subsidiary in one
or more related transactions (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 to the Company or a Restricted Subsidiary or by the Company to a
Restricted Subsidiary) of (i) shares of Capital Stock or other ownership
interests of a Restricted Subsidiary (other than as permitted by clause (v),
(vi), (vii) or (ix) of Section 1017), (ii) substantially all of the assets of
the Company or any Restricted Subsidiary representing a division or line of
business or (iii) other Property of the Company or any Restricted Subsidiary
outside of the ordinary course of business (excluding any transfer, conveyance,
sale, lease or other disposition of equipment that is obsolete or no longer used
by or useful to the Company, provided that the Company has delivered to the
                             --------
Trustee an Officers' Certificate stating that such criteria are satisfied);
provided in each case that the aggregate consideration for such transfer,
--------
conveyance, sale, lease or other disposition is equal to $5,000,000 or more in
any 12-month period. The following shall not be Asset Dispositions: (i)
Permitted Telecommunications Capital Asset Dispositions that comply with clause
(i) of the first paragraph of Section 1016, (ii) when used with respect to the
Company, any Asset
<PAGE>

                                                                               5

Disposition permitted pursuant to Article Eight which constitutes a disposition
of all or substantially all of the assets of the Company and the Restricted
Subsidiaries taken as a whole, (iii) Receivables sales constituting Debt under
Qualified Receivable Facilities permitted to be Incurred pursuant to Section
1010 and (iv) any disposition that constitutes a Permitted Investment or a
Restricted Payment permitted by Section 1012.

     "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 remaining
term thereof (including any period for which such lease has been extended) as
determined in accordance with generally accepted accounting principles,
discounted from the last date of such remaining 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 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.

     "Board of Directors" means the board of directors of the Company.

     "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.
<PAGE>

                                                                               6

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

     "Capital Lease Obligation" of any Person means the obligation to pay
rent or other payment amount under a lease of (or other Debt arrangements
conveying the right to use) 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 and any rights (other than debt securities
convertible or exchangeable into an equity interest), warrants or options to
acquire an equity interest in such Person.

        "Cash Equivalents" means (i) Government Securities maturing, or subject
to tender at the option of the holder thereof, within two years after the date
of acquisition thereof, (ii) time deposits and certificates of deposit of any
commercial bank organized in the United States having capital and surplus in
excess of $500,000,000 or a commercial bank organized under the law of any
other country that is a member of the OECD having total assets in excess of
$500,000,000 (or its foreign currency equivalent at the time) with a maturity
date not more than one year from the date of acquisition, (iii) repurchase
obligations with a term of not more than 30 days for underlying securities of
the types described in clause (i) above entered into with (x) any bank meeting
the qualifications specified in
<PAGE>

                                                                               7

clause (ii) above or (y) any primary government securities dealer reporting to
the Market Reports Division of the Federal Reserve Bank of New York, (iv) 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 maturing, or
subject to tender at the option of the holder thereof, within 90 days after the
date of acquisition thereof, provided that, at the time of acquisition, the
                             --------
long-term debt of such state, political subdivision or public instrumentality
has a rating of A (or higher) from S&P or A-2 (or higher) from Moody's (or, if
at any time neither S&P nor Moody's shall be rating such obligations, then an
equivalent rating from such other nationally recognized rating service
acceptable to the Trustee), (v) commercial paper issued by the parent
corporation of any commercial bank organized in the United States having capital
and surplus in excess of $500,000,000 or a commercial bank organized under the
laws of any other country that is a member of the OECD having total assets in
excess of $500,000,000 (or its foreign currency equivalent at the time), and
commercial paper issued by others having one of the two highest ratings
obtainable from either S&P or Moody's (or, if at any time neither S&P nor
Moody's shall be rating such obligations, then from such other nationally
recognized rating service acceptable to the Trustee) and in each case maturing
within one year after the date of acquisition, (vi) overnight bank deposits and
bankers' acceptances at any commercial bank organized in the United States
having capital and surplus in excess of $500,000,000 or a commercial bank
organized under the laws of any other country that is a member of the OECD
having total assets in excess of $500,000,000 (or its for eign currency
equivalent at the time), (vii) deposits available for withdrawal on demand with
a commercial bank organized in the United States having capital and surplus in
excess of $500,000,000 or a commercial bank organized under the laws of any
other country that is a member of the OECD having total assets in excess of
$500,000,000 (or its foreign currency equivalent at the time) and (viii)
investments in money market funds substantially all of whose assets comprise
securities of the types described in clauses (i) through (vii).

     "Change of Control" has the meaning specified in Section 1009.
<PAGE>

                                                                               8

     "Change of Control Triggering Event" has the meaning specified in
Section 1009.

     "Clearstream" means Clearstream International, a clearing and
settlement organization.

     "Code" means the Internal Revenue Code of 1986, as amended.

     "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 Indenture such Commission is not existing and performing
the duties now assigned to it under the Trust Indenture Act, then the body
performing such duties at such time.

     "Common Depositary" means The Bank of New York Depositary (Nominees) Ltd.
and its nominees and successors, as common depositary for Euroclear and
Clearstream.

   "Common Stock" of any Person means Capital Stock of such Person that
does not rank 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.

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

     "Company Order" or "Company Request" means a written request or order
signed in the name of the Company by the Chairman of the Board of Directors, a
Vice Chairman of the Board of Directors, the President or a Vice President, and
by the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, an
Assistant Treasurer, the Controller, the Secretary or an Assistant Secretary of
the Company and delivered to the Trustee.
<PAGE>

                                                                               9

         "Consolidated Capital Ratio" means as of the date of determination the
ratio of (i) the aggregate amount of Debt of the Company and its Restricted
Subsidiaries on a consolidated basis as at the date of determination to (ii) the
sum of (a) $2,024,000,000, (b) the aggregate net proceeds to the Company from
the issuance or sale of any Capital Stock (including Preferred Stock) of the
Company other than Disqualified Stock subsequent to the Measurement Date, (c)
the aggregate net proceeds from the issuance or sale of Debt of the Company or
any Restricted Subsidiary subsequent to the Measurement Date convertible or
exchangeable into Capital Stock of the Company other than Disqualified Stock, in
each case upon conversion or exchange thereof into Capital Stock of the Company
subsequent to the Measurement Date and (d) the after-tax gain on the sale,
subsequent to the Measurement Date, of Special Assets to the extent such Special
Assets have been sold for cash, Cash Equivalents, Telecommunications/IS Assets
or the assumption of Debt of the Company or any Restricted Subsidiary (other
than Debt that is subordinated to the Securities or any applicable Restricted
Subsidiary Guarantee) and release of the Company and all Restricted Subsidiaries
from all liability on the Debt assumed; provided, however, that, for purposes of
                                        --------  -------
calculation of the Consolidated Capital Ratio, the net proceeds from the
issuance or sale of Capital Stock or Debt described in clause (b) or (c) above
shall not be included to the extent (x) such proceeds have been utilized to make
a Permitted Investment under clause (i) of the definition thereof or a
Restricted Payment or (y) such Capital Stock or Debt shall have been issued or
sold to the Company, a Subsidiary of the Company or an employee stock ownership
plan or trust established by the Company or any such Subsidiary for the benefit
of their employees.

         "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, to the extent reducing Consolidated Net
Income for such period, (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) consolidated depreciation and amortization expense and any other non-cash
items (other than any such non-cash item to the extent that it represents an
accrual of
<PAGE>

                                                                              10

or reserve for cash expenditures in any future period); provided, however, that
                                                        --------  -------
there shall be excluded therefrom the Consolidated Cash Flow Available for Fixed
Charges (if positive) of any Restricted Subsidiary (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 to the
extent of such restrictions.

     "Consolidated Income Tax Expense" for any period means the aggregate
amounts of the provisions 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" for any period means the interest
expense included in a consolidated income statement (excluding interest income)
of the Company and its Restricted Subsidiaries for such period 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 and issuance costs, including commitment fees;
(ii) any payments or fees with respect to letters of credit, bankers'
acceptances or similar facilities; (iii) net costs with respect to interest rate
swap or similar agreements or foreign currency hedge, exchange or similar
agreements (including fees); (iv) Preferred Stock Dividends (other than
dividends paid in shares of Preferred Stock that is not Disqualified Stock)
declared and paid or payable; (v) accrued Disqualified Stock Dividends, whether
or not declared or paid; (vi) interest on Debt guaranteed by the Company and its
Restricted Subsidiaries; (vii) the portion of any Capital Lease Obligation or
Sale and Leaseback Transaction paid during such period that is allocable to
interest expense; (viii) interest Incurred in connection with investments in
discontinued operations; and (ix) the cash contributions to any employee stock
ownership plan or similar trust to the extent such contributions are used by
such plan or trust to pay interest or fees to any Person (other than the Company
or a Restricted Subsidiary) in connection with Debt Incurred by such plan or
trust.
<PAGE>

                                                                              11

     "Consolidated Net Income" for any period means the net income (or loss)
of the Company and its Restricted Subsi diaries for such period determined on a
consolidated basis in accordance with generally accepted accounting principles;
provided that there shall be excluded therefrom (a) for purposes of Section 1012
--------
only, the net income (or loss) of any Person acquired by the Company or a
Restricted Subsidiary 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 that is not a Restricted Subsidiary except to the extent of the amount of
dividends or other distributions actually paid to the Company or a Restricted
Subsidiary by such Person during such period (except, for purposes of Section
1012 only, to the extent such dividends or distributions have been subtracted
from the calculation of the amount of Investments to support the actual making
of Investments), (c) gains or losses realized upon the sale or other disposition
of any Property of the Company or its Restricted Subsidiaries that is not sold
or disposed of in the ordinary course of business (it being understood that
Permitted Telecommunications Capital Asset Dispositions shall be considered to
be in the ordinary course of business), (d) gains or losses realized upon the
sale or other disposition of any Special Assets, (e) all extraordinary gains
and extraordinary losses, determined in accordance with generally accepted
accounting principles, (f) the cumulative effect of changes in accounting
principles, (g) non-cash gains or losses resulting from fluctuations in currency
exchange rates, (h) any non-cash expense related to the issuance to employees or
directors of the Company or any Restricted Subsidiary of (1) options to purchase
Capital Stock of the Company or such Restricted Subsidiary or (2) other
compensatory rights; provided, in either case, that such options or rights, by
                     --------
their terms can be redeemed at the option of the holder of such option or right
only for Capital Stock, and (i) with respect to a Restricted Subsidiary that is
not a Wholly Owned Subsidiary any aggregate net income (or loss) in excess of
the Company's or any Restricted Subsidiary's pro rata share of the net income
(or loss) of such Restricted Subsidiary that is not a Wholly Owned Subsidiary;
provided further that there shall further be excluded therefrom the net income
----------------
(but not net loss) of any Restricted Subsidiary that is subject to a restriction
which prevents the payment of dividends or the making of
<PAGE>

                                                                              12

distributions to the Company or another Restricted Subsidiary to the extent of
such restriction.

     "Consolidated Net Worth" of any Person means the 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.

     "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 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.

     "Corporate Trust Office" means the principal corporate trust office of
the Trustee, at which at any particular time its corporate trust business shall
be administered, which office at the date of execution of this Indenture is
located at 101 Barclay Street, Floor 21W, New York, New York 10286.

     "Credit Agreement" means the Credit Agreement dated as of September 30,
1999, among the Company, certain subsi diaries of the Company, the lenders
parties thereto and The Chase Manhattan Bank, as Administrative Agent and
Collateral Agent.

     "Credit Facilities" means one or more credit agree ments, loan
agreements or similar facilities, secured or unsecured, providing for revolving
credit loans, term loans and/or letters of credit, including the Credit
Agreement and any Qualified Receivable Facility, entered into from time to time
by the Company and its Restricted Subsidiaries, and including any related notes,
Guarantees, collateral documents, instruments and agreements executed in
connection therewith, as the same may be amended, supplemented, modified,
restated or replaced from time to time.

     "Debt" means (without duplication), with respect to any Person, whether
recourse is to all or a portion of the
<PAGE>

                                                                              13

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 obligations
incurred in connection with the acquisition of Property, (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), (v) every Capital Lease Obligation of such
Person and all Attributable Value in respect of Sale and Leaseback Transactions
entered into by such Person, (vi) all obligations to redeem or repurchase
Disqualified Stock issued by such Person, (vii) the liquidation preference of
any Preferred Stock (other than Disqualified Stock, which is covered by the
preceding clause (vi)) issued by any Restricted Subsidiary of 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, except as otherwise set forth herein, the Accreted Value of
such Debt at such time or (b) in the case of any Receivables sale constituting
Debt, the amount of the unrecovered purchase price (that is, the amount paid for
Receivables that has not been actually recovered from the collection of such
Receivables) paid by the purchaser (other than the Company or a Wholly Owned
Restricted Subsidiary of the Company) thereof. The amount of Debt represented by
an obligation under an Interest Rate or Currency Protection Agreement shall be
equal to (x) zero if such obligation has been Incurred pursuant to clause (x) of
paragraph (b) of Section 1010 or (y) the notional amount of such obligation if
not Incurred pursuant to such clause.
<PAGE>

                                                                              14

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

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

     "Depository" means The Depository Trust Company, its nominees and
successors.

     "Designation" and "Designation Amount" have the respective meanings
specified in Section 1019.

     "Disqualified Stock" of any Person means any Capital Stock of such
Person 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;
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 a change of control occurring prior to the final Stated Maturity
of the Securities shall not constitute Disqualified Stock if the 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 1009 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 1009.

     "Disqualified Stock Dividends" means all dividends with respect to
Disqualified Stock of the Company held by Persons other than a Wholly Owned
Restricted Subsidiary. The amount of any such dividend shall be equal to the
quotient of such dividend divided by the difference between one and the maximum
statutory federal income tax rate (expressed as a decimal number between 1 and
0) applicable to the Company for the period during which such dividends were
paid.
<PAGE>

                                                                              15

     "Dollar Notes" means, collectively, the Company's 11% Senior Notes due
2008 in an aggregate principal amount not to exceed $800,000,000, the Company's
11 1/4% Senior Notes due 2010 in an aggregate amount not to exceed $250,000,000
and the Company's 12 7/8% Senior Discount Notes due 2010 in an aggregate
principal amount at maturity not to exceed $675,000,000.

     "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.

     "euro" means the single currency at the start of the third stage of
economic and monetary union on January 1, 1999, pursuant to the Treaty
establishing the European Economic Community as amended by the Treaty on
European Union, signed at Maastricht on February 7, 1992, and the Treaty signed
at Amsterdam on October 2, 1997.

     "Euroclear" means the Euroclear System, a clearing and settlement
organization.

     "Euro Notes" means the Company's 11 1/4% Senior Euro Notes due 2010 in
an aggregate principal amount not to exceed (Euro)300,000,000.

     "European Government Obligation" means direct non-callable obligations
of, or non-callable obligations permitted by, any state member of the European
Union, the payment or guarantee of which is secured by the pledge of the full
faith and credit of the respective nation, provided that such nation has a
                                           --------
credit rating at least equal to that of the highest rated member nation of the
member nations of the European Union.

     "European Union" means the state members to the third stage of economic
and monetary union pursuant to the Treaty of Rome establishing the European
Community, as amended by the Treaty on European Union, signed at Maastricht on
<PAGE>

                                                                              16

February 7, 1992, and the Treaty signed at Amsterdam on October 2, 1997.

     "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 (or respective
successors thereto).

     "Exchange Securities" has the meaning stated in the first recital of
this Indenture.

     "Excess Proceeds" has the meaning specified in Section 1016.

     "Existing Notes" means the 9 1/8% Senior Notes, the 10 1/2% Senior
Discount Notes and the 6% Convertible Notes.

     "Expiration Date" has the meaning specified in "Offer to Purchase"
below.

     "Fair Market Value" means, with respect to any Property, the price that
could be negotiated in an arm's length free market transaction, for cash,
between a willing seller and a willing buyer, neither of whom is under pressure
or compulsion to complete the transaction. Unless otherwise specified herein,
Fair Market Value shall be determined by the Board of Directors acting in good
faith and shall be evidenced by a Board Resolution delivered to the Trustee.

     "Federal Bankruptcy Code" means the Bankruptcy Act of Title 11 of the
United States Code, as amended from time to time.

     "Global Security" means a Rule 144A Global Security, an Institutional
Accredited Investor Global Security or a Regulation S Global Security, as the
case may be.

     "Government Securities" means direct obligations of, or obligations
fully and unconditionally guaranteed or insured by, the United States of America
or any agency or instrumentality thereof for the payment of which obligations
or guarantee the full faith and credit of the United States is
<PAGE>

                                                                              17

pledged and which are not callable or redeemable at the issuer's option (unless,
for purposes of the definition of "Cash Equivalents" only, the obligations are
redeemable or callable at a price not less than the purchase price paid by the
Company or the applicable Restricted Subsidiary, together with all accrued and
unpaid interest (if any) on such Government Securities).

     "Guarantee" by any Person means any obligation, direct or indirect,
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 any obligation, direct or
indirect, contingent or otherwise, 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, including any such obligations arising by virtue of partnership
arrangements or by agreements to keep-well, (ii) to purchase Property or
services or to take-or-pay for the purpose of assuring the holder of such Debt
of the payment of such Debt, (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 or (iv) entered into for the
purpose of assuring in any other manner the obligee against loss in respect
thereof, in whole or in part (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.

     "Guarantor" means a Restricted Subsidiary of the Company that has
executed a Restricted Subsidiary Guarantee, until a successor Person shall have
become such pursuant to the applicable provisions of this Indenture, and
thereafter "Guarantor" shall mean such successor Person.

     "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
<PAGE>

                                                                              18

otherwise become liable in respect of such Debt or other obligation including
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. Debt otherwise
incurred by a Person before it becomes a Subsidiary of the Company shall be
deemed to have been Incurred at the time at which it becomes a Subsidiary.

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

     "Initial Foreign Purchaser" means each non U.S. person (within the
meaning of Regulation S) that purchased Initial Securities from the Initial
Purchasers in offshore transactions meeting the requirements of Regulation S.

     "Initial Purchasers" means Salomon Smith Barney International Limited,
Goldman Sachs International, Morgan Stanley & Co. International Limited, Chase
Securities Inc., J.P. Morgan Securities Ltd., Credit Suisse First Boston
(Europe) Limited, Barclays Capital Inc., Credit Lyonnais SA, Kleinwort Benson
Limited and Societe Generale.

     "Initial Securities" has the meaning stated in the first recital of
this Indenture.

     "Institutional Accredited Investor" means an institution that is an
"accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act.

     "Institutional Accredited Investor Global Security" has the meaning
specified in Section 303.

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

                                                                              19

     "Interest Rate or Currency Protection Agreement" of any Person means
any forward contract, futures contract, swap, option or other financial
agreement or arrangement (including caps, floors, collars and similar
agreements) relating to, or the value of which is dependent upon, interest rates
or currency exchange rates or indices.

     "Invested Capital" means the sum of (a) $500,000,000, (b) the aggregate
net proceeds received by the Company from the issuance or sale of any Capital
Stock, including Preferred Stock, of the Company but excluding Disqualified
Stock, subsequent to the Measurement Date, and (c) the aggregate net proceeds
from the issuance or sale of Debt of the Company or any Restricted Subsidiary
subsequent to the Measurement Date convertible or exchangeable into Capital
Stock of the Company other than Disqualified Stock, in each case upon conversion
or exchange thereof into Capital Stock of the Company subsequent to the
Measurement Date; provided, however, that the net proceeds from the issuance or
                  --------  -------
sale of Capital Stock or Debt described in clause (b) or (c) shall be excluded
from any computation of Invested Capital to the extent (i) utilized to make a
Restricted Payment or (ii) such Capital Stock or Debt shall have been issued or
sold to the Company, a Subsidiary of the Company or an employee stock ownership
plan or trust established by the Company or any such Subsidiary for the benefit
of their employees.

     "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, purchase, redemption, retirement or
acquisition of Capital Stock, bonds, notes, debentures or other securities or
evidence of Debt issued by, or Incurrence of, or payment on, a Guarantee of any
obligation of, any other Person; provided that Investments shall exclude
                                 --------
commercially reasonable extensions of trade credit. The amount, as of any date
of determina tion, of any Investment shall be the original cost of such
Investment, plus the cost of all additions, as of such date, thereto and minus
the amount, as of such date, of any portion of such Investment repaid to such
Person in cash as a repayment of principal or a return of capital, as the case
may be (except to the extent such repaid amount has been
<PAGE>

                                                                              20

included in Consolidated Net Income to support the actual making of Restricted
Payments), but without any other adjustments for increases or decreases in
value, or write-ups, write-downs or write-offs with respect to such Investment.
In determining the amount of any Investment involving a transfer of any Property
other than cash, such Property shall be valued at its Fair Market Value at the
time of such transfer.

     "Issue Date" means the date on which the Initial Securities are
initially issued.

     "Issue Date Purchase Money Debt" means Purchase Money Debt outstanding
on the Issue Date; provided, that the amount of such Purchase Money Debt when
                   --------
Incurred did not exceed 100% of the cost of the construction, installation,
acquisition, lease, development or improvement of the applicable
Telecommunications/IS Assets.

     "Issue Date Rating" means B3 in the case of Moody's and B in the case
of S&P, which are the respective ratings assigned to the Securities by the
Rating Agencies on the Issue Date.

     "Joint Venture" means a Person in which the Company or a Restricted
Subsidiary holds not more than 50% of the shares of Voting Stock.

     "Lien" means, with respect to any Property, any mortgage or deed of
trust, pledge, hypothecation, assignment, deposit arrangement, security
interest, lien, charge, easement (other than any easement not materially
impairing usefulness), encumbrance, preference, priority or other security
agreement or preferential arrangement of any kind or nature whatsoever on or
with respect to such Property (including any Capital Lease Obligation,
conditional sale or other title retention agreement having substantially the
same economic effect as any of the foregoing and any Sale and Leaseback
Transaction). For purposes of this definition the sale, lease, conveyance or
other transfer by the Company or any of its Subsidiaries of, including the grant
of indefeasible rights of use or equivalent arrangements with respect to, dark
or lit communications fiber capacity or communications conduit shall not
constitute a Lien.
<PAGE>

                                                                              21

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

     "Measurement Date" means April 28, 1998, the date the 91/8% Senior
Notes were originally issued.

     "Moody's" means Moody's Investors Service, Inc. or, if Moody's Investors
Service, Inc. shall cease rating debt securities having a maturity at original
issuance of at least one year and such ratings business shall have been
transferred to a successor Person, such successor Person; provided, however,
                                                          --------  -------
that if Moody's Investors Service, Inc. ceases rating debt securities having a
maturity at original issuance of at least one year and its ratings business with
respect thereto shall not have been transferred to any successor Person, then
"Moody's" shall mean any other national recognized rating agency (other than
S&P) that rates debt securities having a maturity at original issuance of at
least one year and that shall have been designated by the Trustee by a written
notice given to the Company.

     "Net Available Proceeds" from any Asset Disposition by any Person means
cash or cash equivalents received (including amounts received by way of sale or
discounting of any 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 Property) therefrom by
such Person, net of (i) all legal, title and recording taxes, expenses and
commissions and other fees and expenses (including appraisals, brokerage
commissions and investment banking fees) Incurred and all federal, state,
provincial, foreign and local taxes required to be accrued as a liability as a
consequence of such Asset Disposition, (ii) all payments made by such Person or
its Subsidiaries on any Debt which is secured by such Property in accordance
with the terms of any Lien upon or with respect to such Property 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 required to be
made to minority interest holders in Subsidiaries or Joint
<PAGE>

                                                                              22

Ventures of such Person as a result of such Asset Disposition and (iv)
appropriate amounts to be provided by such Person or any Subsidiary thereof, as
the case may be, as a reserve in accordance with generally accepted accounting
principles against any liabilities associated with such Property and retained by
such Person or any Subsidiary thereof, as the case may be, after such Asset
Disposition, including 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 of such
Person, 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, for all purposes of this Indenture and the Securities, treated as a new
Asset Disposition at the time of such reduction with Net Available Proceeds
equal to the amount of such reduction; provided further, however, that, in the
                                       ----------------  -------
event that any consideration for a transaction (which would otherwise constitute
Net Available Proceeds) is required to be held in escrow pending determination
of whether a purchase price adjustment will be made, at such time as such
portion of the consideration is released to such Person or its Restricted
Subsidiary from escrow, such portion shall be treated for all purposes of this
Indenture and the Securities as a new Asset Disposition at the time of such
release from escrow with Net Available Proceeds equal to the amount of such
portion of consideration released from escrow.

     "New Convertible Notes" means the Company's 6% Convertible Subordinated
Notes due 2010 in an aggregate principal amount not to exceed $862,500,000.

     "9 1/8% Senior Notes" means the Company's 91/8% Senior Notes due 2008 in
an aggregate principal amount not to exceed $2,000,000,000, originally issued on
April 28, 1998.

     "Non-Global Purchasers" has the meaning specified in Section 303.

     "Offer" has the meaning specified in "Offer to Purchase" below.
<PAGE>

                                                                              23

     "Offer to Purchase" means a written offer (the "Offer") sent by the Company
by first-class mail, postage prepaid, to each Holder of Securities at its
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
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:
<PAGE>

                                                                              24

          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% of the Outstanding Securities, the manner by
     which such has been determined pursuant to the Section hereof requiring the
     Offer to Purchase) (the "Purchase Amount");

          d.   the purchase price to be paid by the Company for (Euro)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 (Euro)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 any Securities not tendered or tendered but not purchased
     by the Company will continue to accrue interest;

          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, if any, 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 Date (such Security being, if the Company or the Trustee so
     requires, duly endorsed by, or accompanied by a written instrument of
     transfer in
<PAGE>

                                                                              25

     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 the Paying Agent) receives, not
     later than the close of business on the Expiration Date, a 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 (i) 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 (ii) 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 (Pounds)1,000 principal amount or integral multiples
     thereof shall be purchased); and

          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.

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

     "Officers' Certificate" means a certificate signed by the Chairman of
the Board of Directors, a Vice Chairman of the Board of Directors, the President
or a Vice President, and by the Chief Financial Officer, the Chief Accounting
Officer, the Treasurer, an Assistant Treasurer, the
<PAGE>

                                                                              26

Controller, the Secretary or an Assistant Secretary of the Company and delivered
to the Trustee, which shall comply with this Indenture.

     "Opinion of Counsel" means an opinion of counsel acceptable to the
Trustee (who may be counsel to the Company, including an employee of the
Company).

     "OECD" shall mean the Organization for Economic Cooperation and
Development.

     "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)      on and after any maturity date, Securities, or portions
     thereof, for whose payment 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 the Trustee or the Paying Agent, as applicable,
                 --------
     is not prohibited from paying such money to the Holders;

          (iii)     Securities, except to the extent provided in Sections 1202
     and 1203, with respect to which the Company has effected defeasance or
     covenant defeasance as provided in Article Twelve; and

          (iv)      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 the Securities are valid obligations of the
     Company;
<PAGE>

                                                                              27

provided, however, that in determining whether the Holders of the requisite
--------  -------
principal amount of Outstanding Securities have given any request, demand,
authorization, direction, consent, notice or waiver hereunder, and for the
purpose of making the calculations required by TIA Section 313, Securities
owned by the Company or any other obligor upon the Securities or any
Affiliate of the Company or such other obligor shall be disregarded and
deemed not to be Outstanding, except that, in determining whether the
Trustee shall be protected in making such calculation or in relying upon
any such request, demand, authorization, direction, notice, consent or
waiver, only Securities which any Responsible Officer of the Trustee knows
to be so owned or as to which the Trustee has received written notice 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 such other
obligor.

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

     "Permitted Holders" means the members of the Company's Board of
Directors on the Measurement Date and their respective estates, spouses,
ancestors, and lineal descendants, the legal representatives of any of the
foregoing and the trustees of any bona fide trusts of which the foregoing are
the sole beneficiaries or the grantors, or any Person of which the foregoing
"beneficially owns" (as defined in Rule 13d-3 under the Exchange Act) at least
662/3% of the total voting power of the Voting Stock of such Person.

     "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 not for purposes of
speculation and which,
<PAGE>

                                                                              28

in the case of an interest rate agreement, shall have a notional amount no
greater than the principal amount at maturity due with respect to the Debt being
hedged thereby.

     "Permitted Investments" means (a) Cash Equivalents; (b) investments in
prepaid expenses; (c) negotiable instruments held for collection and lease,
utility and workers' compensation, performance and other similar deposits; (d)
loans, advances or extensions of credit to employees and directors made in the
ordinary course of business and consistent with past practice; (e) obligations
under Permitted Interest Rate or Currency Protection Agreements; (f) bonds,
notes, debentures and other securities received as a result of Asset
Dispositions pursuant to and in compliance with Section 1016; (g) Investments in
any Person as a result of which such Person becomes a Restricted Subsidiary; (h)
Investments made prior to the Measurement Date; (i) Investments made after the
Measurement Date in Persons engaged in the Telecommunications/IS Business in an
aggregate amount not to exceed Invested Capital; (j) solely in connection with
the defeasance of euro-denominated Debt permitted under this Indenture, European
Government Obligations; and (k) additional Investments in an aggregate amount
not to exceed $200,000,000.

     "Permitted Liens" means (a) Liens for taxes, assessments, governmental
charges, levies 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'
businesses or the ownership of its Property 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 when taken as a whole, or materially impair
the use thereof in the operation of its business; (c) Liens, pledges and
deposits made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of statutory obligations;
(d) Liens, pledges or deposits made to secure the performance of tenders, bids,
leases, public or statutory obligations, sureties, stays, appeals, indemnities,
performance or other
<PAGE>

                                                                              29

similar bonds and other obligations of like nature incurred in the ordinary
course of business (exclusive of obligations for the payment of borrowed money,
the obtaining of advances or credit or the payment of the deferred purchase
price of Property and which do not in the aggregate materially impair the use of
Property in the operation of the business of the Company and the Restricted
Subsidiaries taken as a whole); (e) 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 materially interfere
with the ordinary conduct of the business of the Company or its Restricted
Subsidiaries; and (f) any interest or title of a lessor in the Property subject
to any lease other than a Capital Lease.

     "Permitted Telecommunications Capital Asset Disposition" means the
transfer, conveyance, sale, lease or other disposition of optical fiber and/or
conduit and any related equipment used in a Segment (as defined) of the
Company's communications network that (i) constitute capital assets in
accordance with generally accepted accounting principles and (ii) after giving
effect to such disposition, would result in the Company retaining at least
either (A) 24 optical fibers per route mile on such Segment as deployed at the
time of such disposition or (B) 12 optical fibers and one empty conduit per
route mile on such Segment as deployed as such time. "Segment" means (x) with
respect to the Company's intercity network, the through-portion of such network
between two local networks (i.e., Omaha to Denver) and (y) with respect to a
local network of the Company (i.e., Dallas), the entire through-portion of such
network, excluding the spurs which branch off the through-portion.

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

     "Physical Security" has the meaning specified in Section 303.
<PAGE>

                                                                              30

     "Predecessor Security" of any particular Security means every previous
Security 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 a mutilated
security or in lieu of a lost, destroyed or stolen Security shall be deemed to
evidence the same debt as the mutilated, lost, destroyed or stolen Security.

     "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.

     "Preferred Stock Dividends" means all dividends with respect to Preferred
Stock of Restricted Subsidiaries held by Persons other than the Company or a
Wholly Owned Restricted Subsidiary. The amount of any such dividend shall be
equal to the quotient of such dividend divided by the difference between one and
the maximum statutory federal income rate (expressed as a decimal number between
1 and 0) applicable to the issuer of such Preferred Stock for the period during
which such dividends were paid.

     "Private Exchange Offer" means the offer by the Company, pursuant to
Section 2(f) of the Registration Agreement, to issue and deliver to certain
purchasers, in exchange for the Initial Securities held by such purchasers as
part of their initial distribution, a like aggregate principal amount of Private
Exchange Securities.

     "Private Exchange Securities" means the Exchange Securities to be
issued pursuant to this Indenture in connection with a Private Exchange Offer
pursuant to the Registration Agreement.

     "Private Placement Legend" means the third paragraph of the legend set
forth in the Securities in the form set forth in Exhibit A.

     "Property" means, with respect to any Person, any interest of such
Person in any kind of property or asset, whether real, personal or mixed, or
tangible or intangible,
<PAGE>

                                                                              31

including Capital Stock in, and other securities of, any other Person. For
purposes of any calculation required pursuant to this Indenture, the value of
any Property shall be its Fair Market Value.

     "Proportionate Interest" in any issuance of Capital Stock of a
Restricted Subsidiary means a ratio (i) the numerator of which is the aggregate
amount of all Capital Stock of such Restricted Subsidiary beneficially owned by
the Company and the Restricted Subsidiaries and (ii) the denominator of which is
the aggregate amount of Capital Stock of such Restricted Subsidiary beneficially
owned by all Persons (excluding, in the case of this clause (ii), any Investment
made in connection with such issuance).

     "Purchase Amount" has the meaning specified in "Offer to Purchase" above.

     "Purchase Date" has the meaning specified in "Offer to Purchase" above.

     "Purchase Money Debt" means Debt (including Acquired Debt and Capital Lease
Obligations, mortgage financings and purchase money obligations) incurred for
the purpose of financing all or any part of the cost of construction,
installation, acquisition, lease, development or improvement by the Company or
any Restricted Subsidiary of any Telecommunications/IS Assets of the Company or
any Restricted Subsidiary 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.

     "Purchase Price" has the meaning specified in "Offer to Purchase" above.

     "Qualified Institutional Buyer" or "QIB" has the meaning specified in
Rule 144A.

     "Qualified Receivable Facility" means Debt of the Company or any
Subsidiary Incurred from time to time pursuant to either (x) credit facilities
secured by Receivables or (y) Receivables purchase facilities, and including any
related notes, Guarantees, collateral
<PAGE>

                                                                              32

documents, instruments and agreements executed in connection therewith, as the
same may be amended, supplemented, modified or restated from time to time.

     "Rating Agencies" means Moody's and S&P.

     "Rating Date" means the earlier of the date of public notice of the
occurrence of a Change of Control or of the intention of the Company to effect a
Change of Control.

     "Rating Decline" shall be deemed to have occurred if, no later than 90
days after the Rating Date (which period shall be extended so long as the rating
of the Securities is under publicly announced consideration for possible
downgrade by any of the Rating Agencies), either of the Rating Agencies assigns
or reaffirms a rating to the Securities that is lower than the applicable Issue
Date Rating (or the equivalent thereof). If, prior to the Rating Date, either of
the ratings assigned to the Securities by the Rating Agencies is lower than the
applicable Issue Date Rating, then a Rating Decline will be deemed to have
occurred if such rating is not changed by the 90th day following the Rating
Date. A downgrade within rating categories, as well as between rating
categories, will be considered a Rating Decline.

     "Receivables" means receivables, chattel paper, instruments, documents
or intangibles evidencing or relating to the right to payment of money and
proceeds and products thereof in each case generated in the ordinary course of
business.

     "refinancing" has the meaning specified in Section 1010(b)(viii).

     "Registered Exchange Offer" means the offer by the Company, pursuant to
the Registration Agreement, to certain Holders of Initial Securities, to issue
and deliver to such Holders, in exchange for the Initial Securities, a like
aggregate principal amount of Exchange Securities registered under the
Securities Act.

     "Registration Agreement" means the Euro Registration Agreement dated
February 24, 2000, between the Company and the Initial Purchasers relating to
the Initial Securities.
<PAGE>

                                                                              33

     "Registration Default" has the meaning specified in Exhibit A.

     "Regular Record Date" for the interest payable on any Interest Payment
Date means the March 1 or September 1 (whether or not a Business Day), as the
case may be, next preceding such Interest Payment Date.

     "Regulation S" means Regulation S under the Securities Act.

     "Regulation S Global Security" has the meaning specified in Section 303.

     "Required Filing Dates" has the meaning specified in Section 1007.

     "Responsible Officer", when used with respect to the Trustee, means any
officer within the Trustee's Corporate Trust Office, including any vice
president, any assistant secretary, any assistant treasurer, 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 Payment" has the meaning specified in Section 1012.

     "Restricted Subsidiary" means (a) a Subsidiary of the Company or of a
Restricted Subsidiary that has not been designated or classified as an
Unrestricted Subsidiary pursuant to and in compliance with Section 1019 and (b)
an Unrestricted Subsidiary that is redesignated as a Restricted Subsidiary
pursuant to such Section.

     "Restricted Subsidiary Guarantee" means a supplemental indenture to this
Indenture in substantially the form set forth in Exhibit B hereto, providing for
an unconditional Guarantee of payment in full of the principal of, premium, if
any, and interest on the Securities. Any such Restricted Subsidiary Guarantee
shall not be subordinate to any Debt of
<PAGE>

                                                                              34

the Restricted Subsidiary providing the Restricted Subsidiary Guarantee.

     "Revocation" has the meaning specified in Section 1019.

     "Rule 144A" means Rule 144A under the Securities Act.

     "Rule 144A Global Security" has the meaning specified in Section 303.

     "S&P" means Standard & Poor's Ratings Service or, if Standard & Poor's
Ratings Service shall cease rating debt securities having a maturity at original
issuance of at least one year and such ratings business shall have been
transferred to a successor Person, such successor Person; provided, however,
                                                          --------  -------
that if Standard & Poor's Rating Service ceases rating debt securities having a
maturity at original issuance of at least one year and its ratings business with
respect thereto shall not have been transferred to any successor Person, then
"S&P" shall mean any other national recognized rating agency (other than
Moody's) that rates debt securities having a maturity at original issuance of at
least one year and that shall have been designated by the Trustee by a written
notice given to the Company.

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

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

     "Securities Act" means the Securities Act of 1933, as amended (or any
successor act), and the rules and regulations thereunder (or respective
successors thereto).
<PAGE>

                                                                              35

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

     "Shelf Registration Statement" means a registration statement issued by
the Company in connection with the offer and sale of Initial Securities pursuant
to the Registration Agreement.

     "Significant Subsidiary" means any Subsidiary that would be a
"Significant Subsidiary" of the Company within the meaning of Rule 1-02 under
Regulation S-X promulgated by the Commission.

     "6% Convertible Notes" means the Company's 6% Convertible Subordinated
Notes due 2009 in an aggregate principal amount not to exceed $823,000,000,
originally issued on September 14, 1999.

     "Special Assets" means (a) the Capital Stock or assets of Cable
Michigan, Inc., RCN Corporation, Commonwealth Telephone Enterprises, Inc., KCP,
Inc. and California Private Transportation Company, L.P. (and any intermediate
holding companies or other entities formed solely for the purpose of owning such
Capital Stock or assets) owned, directly or indirectly, by the Company or any
Restricted Subsidiary on the Measurement Date, and (b) any Property, other than
cash, Cash Equivalents and Telecommunications/IS Assets, received as
consideration for the disposition after the Measurement Date of Special Assets
(as contemplated by the first proviso in Section 1016).

     "Special Interest" has the meaning specified in Exhibit A.

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

     "Stated Maturity" when used with respect to a 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 is due and payable, including pursuant to any mandatory repurchase
provision (but excluding any provision providing for the repurchase of such
Security at the option of the
<PAGE>

                                                                              36

Holder thereof upon the happening of any contingency beyond the control of the
Company unless such contingency has occurred).

     "Subordinated Debt" means Debt of the Company (a) that is not secured by
any Lien on or with respect to any Property now owned or acquired after the
Measurement Date and (b) 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 in cash 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 (including by acceleration or for additional
amounts) in respect of, or repurchases, redemptions or other retirements of,
such Debt (collectively, "payments of such Debt") may be permitted for so long
as any default (after giving effect to any applicable grace periods) in the
payment of principal (or premium, if any) or interest on the Securities exists,
including as a result of acceleration; (ii) in the event that any other Default
exists with respect to the Securities, upon notice by Holders of 25% or more in
aggregate 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 such Debt may be made for a period of 179 days from the date of such notice,
provided that not more than one such payment blockage notice may be given in any
--------
consecutive 360-day period, irrespective of the number of defaults with respect
to the Securities during such period; (iii) if payment of such Debt is
accelerated when any Securities are Outstanding, no payments of such Debt may be
made until three Business Days after the Trustee receives notice of such
acceleration and, thereafter, such payments may only be made to the extent the
terms of such Debt permit payment at that time; and (iv) 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
<PAGE>

                                                                              37

thereunder), in each case prior to the final Stated Maturity of the Securities
or (y) permit redemption or other retire ment (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, in
the case of clause (x) or (y), any such payment, redemption or other retirement
(including pursuant to an offer to purchase made by the Company) which is
conditioned upon (A) a change of control of the Company pursuant to provisions
substantially similar to those described in Section 1009 (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 described in Section 1009) or (B) a sale or
other disposition of assets pursuant to provisions substantially similar
to those described in 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
provision described in 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 Subsi-
diaries thereof, directly or indirectly, has at least a majority ownership and
power to direct the policies, management and affairs thereof.

     "Telecommunications/IS Assets" means (a) any Property (other than cash,
cash equivalents and securities) to be owned by the Company or any Restricted
Subsidiary and used in the Telecommunications/IS Business; (b) for purposes of
Sections 1010 and 1014 only, Capital Stock of any Person; or (c) for all other
purposes of this Indenture, Capital Stock of a Person that becomes a Restricted
Subsidiary as a result of the acquisition of such Capital Stock by the Company
or another Restricted Subsidiary from any Person other than an Affiliate of the
Company; provided, however, that, in the
         --------  -------
<PAGE>

                                                                              38

case of clause (b) or (c), such Person is primarily engaged in the
Telecommunications/IS Business.

     "Telecommunications/IS 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)
constructing, creating, developing or marketing communications networks, related
network transmission equipment, software and other devices for use in a
communications business, (iii) computer outsourcing, data center management,
computer systems integration, reengineering of computer software for any purpose
(including, without limitation, for the purposes of porting computer software
from one operating environment or computer platform to another or to address
issues commonly referred to as "Year 2000 issues") or (iv) evaluating,
participating or pursuing any other activity or opportunity that is primarily
related to those identified in (i), (ii) or (iii) above; provided that the
                                                         --------
determination of what constitutes a Telecommunications/IS Business shall be made
in good faith by the Board of Directors.

     "10 1/2% Senior Discount Notes" means the Company's 10 1/2% Senior
Discount Notes due 2008 in an aggregate principal amount at maturity not to
exceed $833,815,000, originally issued on November 24, 1998.

     "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939 as
in force at the date as of which this Indenture was executed, except as provided
in Section 905.

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

     "Unrestricted Subsidiary" means (a) 91 Holding Corp.; (b) any
Subsidiary of an Unrestricted Subsidiary; and (c) any Subsidiary of the Company
designated as such pursuant to and in compliance with Section 1019 and not
thereafter redesignated as a Restricted Subsidiary as permitted pursuant
thereto.
<PAGE>

                                                                              39

     "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 for so long as
no senior class of securities has such voting power by reason of any
contingency.

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

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

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

     Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture 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;
<PAGE>

                                                                              40

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

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

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

     SECTION 103.  Form of Documents Delivered to Trustee.
                   ---------------------------------------

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

     Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or Opinion of Counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.
<PAGE>

                                                                              41

     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 (with
proper identification of each matter covered therein) and form one instrument.

     SECTION 104.  Acts of Holders.
                   ----------------

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

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

     (c)  The principal amount and serial numbers of Securities held by any
Person, and the date of holding the same, shall be proved by the Security
Register.
<PAGE>

                                                                              42

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

     (e)  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. However, any such Holder or future Holder may revoke the request,
demand, authorization, direction, notice, consent, waiver or other Act of the
Holder as to such Holder's Security or portion of the Security if the Trustee
receives the notice of revocation before the date such Act becomes effective.
<PAGE>

                                                                              43

     SECTION 105.  Notices, etc., to Trustee and Company.
                   --------------------------------------

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

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

          (2) the Company or any Guarantor 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 or such Guarantor addressed to it (in the case of a
     Guarantor, in care of the Company) at the address of the Company's
     principal office specified in the first paragraph of this Indenture, or at
     any other address previously furnished in writing to the Trustee by the
     Company.
<PAGE>

                                                                              44

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

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

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

     SECTION 107.  Effect of Headings 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 108.  Successors and Assigns.
                   -----------------------

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

                                                                              45

     SECTION 109.  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 110.  Benefits of Indenture.
                   ----------------------

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

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

     THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF
THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

     SECTION 112.  Conflict with 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 any provision of the Trust Indenture Act or another provision
which is required or deemed to be included in this Indenture by any of the
provisions of the Trust Indenture Act, such provision or requirement of the
Trust Indenture Act 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 excluded,
as the case may be.
<PAGE>

                                                                              46

     SECTION 113.  Legal Holidays.
                   ---------------

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

     SECTION 114.  No Personal Liability of Directors, Officers, Employees and
                   -----------------------------------------------------------
Stockholders.
-------------

     No director, officer, employee, incorporator or stockholder of the Company
or any Guarantor, as such, shall have any liability for any obligations of the
Company or any Guarantor under the Securities or this Indenture or for any claim
based on, in respect of, or by reason of, such obligations or their creation,
solely by reason of its status as a director, officer, employee, incorporator or
stockholder of the Company or a Guarantor. By accepting a Security, each Holder
waives and releases all such liability (but only such liability). The waiver and
release are part of the consideration for issuance of the Securities.

     SECTION 115.  Independence of Covenants.
                   --------------------------

     All covenants and agreements in this Indenture shall be given independent
effect so that if a particular action or condition is not permitted by any of
such covenants, the fact that it would be permitted by an exception to, or be
otherwise within the limitations of, another covenant shall not avoid the
occurrence of a Default if such action is taken or condition exists.

     SECTION 116.  Exhibits.
                   ---------

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

                                                                              47

     SECTION 117.  Counterparts.
                   -------------

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

     SECTION 118.  Duplicate Originals.
                   --------------------

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

                                  ARTICLE TWO

                                SECURITY FORMS

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

     The Securities and the Trustee's certificate of authentication with respect
thereto shall be in substantially the form set forth in Exhibit A hereto, with
such appropriate insertions, omissions, substitutions and other variations as
are required or permitted by this Indenture, and may have such letters, numbers
or other marks of identification and such legends or endorsements placed thereon
as may be required to comply with the rules of any securities exchange or system
on which the Securities may be listed or eligible for trading or as may,
consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities. Any portion of the text of
any Security may be set forth on the reverse thereof, with an appropriate
reference thereto on the face of the Security.

     The definitive Securities shall be printed, lithographed or engraved on
steel-engraved borders or may be produced in any other manner permitted by the
rules of any securities exchange or system on which the Securities may be listed
or eligible for trading, all as determined by the officers of the Company
executing such Securities, as evidenced by their execution of such Securities.
<PAGE>

                                                                              48

                                 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 (Euro)500,000,000, 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, 1009 or 1016.

     The Securities shall be known and designated as the "10 3/4% Senior Euro
Notes Due 2008" of the Company. Their Stated Maturity shall be March 15, 2008,
and they shall bear interest at the rate of 10 3/4% per annum from February 29,
2000, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable on September 15, 2000 and semiannually
thereafter on March 15 and September 15 in each year and at said Stated
Maturity, until the principal thereof is paid or duly provided for.

     Principal of, premium, if any, and interest on the Securities will be
payable, and the Securities may be exchanged or transferred, at the office or
agency of the Company in The City of New York, which, unless otherwise provided
by the Company, will be the offices of the Trustee. At the option of the
Company, interest may be paid by check mailed to addresses of the Persons
entitled thereto as such addresses shall appear on the Security Register.

     The interest rate on the Securities is subject to increase by the addition
of Special Interest and otherwise, all as set forth or referred to in the text
of the Securities appearing in Exhibit A hereto.

     The Securities are not redeemable prior to maturity.

     At the election of the Company, the entire Debt on the Securities or
certain of the Company's obligations and covenants and certain Events of Default
thereunder may be defeased as provided in Article Twelve.
<PAGE>

                                                                              49

     SECTION 302.  Denominations.
                   --------------

     The Securities will be issued without coupons and in fully registered form
only, in minimum denominations of (Euro)1,000 principal amount and integral
multiples thereof.

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

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

     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 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.

     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
duly executed by the Trustee by manual signature of an authorized signatory, and
such certificate upon any Security shall be conclusive evidence, and the only
evidence, that such
<PAGE>

                                                                              50

Security has been duly authenticated and delivered hereunder and is entitled to
the benefits of this Indenture.

     The Trustee shall authenticate and deliver (1) initially one or more Global
Securities for original issue in an aggregate principal amount not to exceed
(Euro)500,000,000 and (2) Exchange Securities for issue only in a Registered
Exchange Offer or a Private Exchange Offer pursuant to the Registration
Agreement, for a like principal amount of Initial Securities, upon receipt of a
Company Order, which shall specify the amount of Securities to be authenticated,
whether the Securities are to be Initial Securities or Exchange Securities, the
date on which such Securities are to be authenticated and direct the Trustee to
authenticate such Securities.

     Except as described below, the Securities will be deposited with, or on
behalf of, the Depository, and registered in the name of Cede & Co. as the
Depository's nominee in the form of a global note certificate substantially in
the form of Exhibit A (the "Rule 144A Global Security"), for credit to the
respective accounts of the beneficial owners of the Securities represented
thereby.

     Securities transferred to persons outside the United States pursuant to
sales in accordance with Regulation S under the Securities Act shall be
deposited with, or on behalf of, the Common Depositary, and registered in the
name of Cede & Co. as the Common Depositary's nominee in the form of one or more
global note certificates substantially in the form of Exhibit A (each a
"Regulation S Global Security"), for credit to the respective accounts of the
beneficial owners of the Securities represented thereby, provided that upon such
                                                         --------
deposit all such Securities shall be credited to or through accounts maintained
at the Depository by or on behalf of the Euroclear System or Clearstream,
societe anonyme.

     Securities transferred to Institutional Accredited Investors will be
deposited with, or on behalf of, the Depository, and registered in the name of
Cede & Co. as the Depository's nominee in the form of one or more global note
certificates substantially in the form of Exhibit A (each a "Institutional
Accredited Investor Global Security"), for
<PAGE>

                                                                              51

credit to the respective accounts of the beneficial owners of the Securities
represented thereby.

     Securities transferred to any persons who are not Qualified Institutional
Buyers or Institutional Accredited Investors (other than persons outside the
United States pursuant to sales or transfers in accordance with Regulation S
under the Securities Act) (collectively, "Non- Global Purchasers") will be
issued in registered definitive form without coupons substantially in the form
of Exhibit A (the "Physical Securities"). Upon the transfer to a Qualified
Institutional Buyer, an Institutional Accredited Investor or to a person outside
the United States pursuant to a sale or transfer in accordance with Regulation S
under the Securities Act of Physical Securities initially issued to a Non-Global
Purchaser, such Physical Security will be exchanged for an interest in a Global
Security representing the principal amount of Securities being transferred.

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

                                                                              52

them, shall provide for the exchange of all Securities at the time Outstanding
for Securities authenticated and delivered in such new name.

     SECTION 304.  Temporary Securities.
                   ---------------------

     Pending the preparation of definitive Securities, the Company may execute,
and upon 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 conclusively evidenced by
their execution of such Securities.

     If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay. After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at the office
or agency of the Company designated for such purpose pursuant to Section 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 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.
<PAGE>

                                                                              53

     SECTION 305.  Registration, Registration of Transfer and Exchange.
                   ----------------------------------------------------
     The Company shall cause to be kept at the Corporate Trust Office of the
Trustee a register (the register maintained in such office and in any other
office or agency designated pursuant to Section 1002 being herein sometimes
referred to as the "Security Register") in which, subject to such reasonable
regulations as the Company may prescribe, the Company shall provide for the
registration of Securities and of transfers of Securities. The Security Register
shall be in written form or any other form capable of being converted into
written form within a reasonable time. At all reasonable times, the Security
Register shall be open to inspection by the Trustee. The Trustee is hereby
initially appointed as security registrar (the "Security Registrar") for the
purpose of registering Securities and transfers of Securities as herein
provided.

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

     At the option of the Holder, Securities may be exchanged for other
Securities of any authorized denomination and of a like aggregate principal
amount, 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 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 Security Registrar) be duly
<PAGE>

                                                                              54

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 for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any transfer tax or other similar governmental charge that may be
imposed in connection with any registration of transfer or exchange of
Securities, other than exchanges pursuant to Section 304, 906, 1009 or 1016 not
involving any transfer.

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

     If (i) any mutilated Security is surrendered to the Trustee or (ii) the
Company and the Trustee receive evidence to their satisfaction of the
destruction, loss or theft of any Security, and there is delivered to the
Company and the Trustee such security or indemnity sufficient to save each of
them harmless, then, in the absence of actual notice to the Company or the
Trustee that such Security has been acquired by a bona fide purchaser, the
Company shall execute and upon Company Order the Trustee shall authenticate and
deliver, in exchange for any such mutilated Security or in lieu of any such
destroyed, lost or stolen Security, a new Security of like tenor and principal
amount, 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 its discretion may,
instead of issuing a new Security, pay such Security.

     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 similar
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

     Every new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security
<PAGE>

                                                                              55

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

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

     SECTION 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 such Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest at the office or
agency of the Company maintained for such purpose pursuant to Section 1002;
provided, however, that each installment of interest may at the Company's option
--------  -------
be paid by mailing a check for such interest, payable to or upon the written
order of the Person entitled thereto pursuant to Section 308, to the address of
such Person as it appears in the Security Register.

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

                                                                              56

          (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 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 given in the manner provided for in
     Section 106, not less than 10 days prior to such Special Record Date.
     Notice of the proposed payment of such Defaulted Interest and the Special
     Record Date therefor having been so given, such Defaulted Interest shall be
     paid to the Persons in whose names the 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 paragraph (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 or system on which the Securities may be listed or
     eligible for trading, and upon such notice as may be required by such
     exchange or system, if, after notice given by the Company to the Trustee of
     the proposed
<PAGE>

                                                                              57

     payment pursuant to this clause, such manner of payment shall be deemed
     practicable by the trustee in its sole discretion.

     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 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 the 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 Sections 305 and 307) interest on such Security and for all
other purposes whatsoever, whether or not such Security is 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.
<PAGE>

                                                                              58

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

     All Securities surrendered for payment, registration of transfer or
exchange shall, if surrendered to any Person other than the Trustee, be
delivered to the Trustee and shall be promptly cancelled by it. The Company may
at any time deliver to the Trustee for cancellation any Securities previously
authenticated and delivered hereunder which the Company may have acquired in any
manner whatsoever, and may deliver to the Trustee (or to any other Person for
delivery to the Trustee) for cancellation any Securities previously
authenticated hereunder which the Company has not issued and sold, and all
Securities so delivered shall be promptly cancelled by the Trustee. If the
Company shall so acquire any of the Securities, however, such acquisition shall
not operate as a redemption or satisfaction of the indebtedness represented by
such Securities unless and until the same are surrendered to the Trustee for
cancellation. 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 by the Trustee in accordance with its customary procedures unless
by Company Order the Company shall direct that cancelled Securities be returned
to it.

     SECTION 310.  Computation of Interest.
                   ------------------------

     Interest on the Securities shall be computed on the basis of a 360-day
year comprised of twelve 30-day months.

     SECTION 311.  CUSIP Number.
                   -------------

     The Company in issuing the Securities may use a "CUSIP" number (if then
generally in use), and if so, the Trustee may use the CUSIP numbers in notices
of exchange as a convenience to Holders; provided, however, that any such notice
                                         --------  -------
may state that no representation is made as to the correctness or accuracy of
the CUSIP number printed in the notice or on the Securities, and that reliance
may be placed only on the other identification numbers printed on the
Securities. The Company shall promptly notify the Trustee in writing of any
change in the CUSIP number of the Securities.
<PAGE>

                                                                              59

     SECTION 312.  Book-Entry Provisions for Global Securities.
                   -------------------------------------------

     (a) The Rule 144A Global Securities and Institutional Accredited Investor
Global Securities initially shall (i) be registered in the name of The
Depository Trust Company or its nominee, (ii) be deposited with the Trustee as
custodian for the Depository and (iii) bear legends as set forth in Exhibit A.
The Regulation S Global Securities initially shall (i) be registered in the name
of The Bank of New York Depositary (Nominees) Ltd., as Common Depositary for
Euroclear and Clearstream, or its nominee, (ii) be deposited with the Common
Depositary and (iii) bear legends as set forth in the Exhibit A.

     Members of, or participants in, the Depository, Euroclear or Clearstream
("Agent Members") shall have no rights under this Indenture with respect to any
Global Security held on their behalf by the Depository or the Common Depositary,
or the Trustee as its custodian, or under the Global Security, and the
Depository and the Common Depositary may be treated by the Company, the Trustee
and any agent of the Company or the Trustee as the absolute owner of the Global
Securities for all purposes whatsoever. Notwithstanding the foregoing, nothing
herein shall (i) prevent the Company, the Trustee or any agent of the Company or
the Trustee from giving effect to any written certification, proxy or other
authorization furnished by the Depository or (ii) impair, as between a
Depository and its Agent Members, the operation of customary practices governing
the exercise of the rights of a Holder of any Security.

     (b) Transfers of Global Securities shall be limited to transfers in whole,
but not in part, to the Depository or the Common Depositary, as the case may be,
their respective successors or their respective nominees. Interests of
beneficial owners in a Rule 144A Global Security may be transferred or exchanged
for interests in an Institutional Accredited Investor Global Security or a
Regulation S Global Security, interests of beneficial owners in an Institutional
Accredited Investor Global Security may be transferred or exchanged for
interests in a Rule 144A Global Security or a Regulation S Global Security and
interests of beneficial owners in a Regulation S Global Security may be
transferred
<PAGE>

                                                                              60

or exchanged for interests in a Rule 144A Global Security or an Institutional
Accredited Investor Global Security, in each case in accordance with the rules
and procedures of the Depository, the Common Depositary, Euroclear, Clearstream
and the provisions of Section 313. Interests of beneficial owners in the Global
Securities may be transferred or exchanged for Physical Securities in accordance
with the rules and procedures of the Depository and the provisions of Section
313. In addition, Physical Securities shall be transferred to all beneficial
owners in exchange for their beneficial interests in a Global Security if (i)
the Depository or the Common Depositary, as the case may be, notifies the
Company that it is unwilling or unable to continue as a depository for such
Global Security or if at any time the Depository ceases to be a clearing agency
registered under the Exchange Act, and a successor depository is not appointed
by the Company within 90 days, (ii) the Company executes and delivers to the
Trustee a notice that such Global Security shall be so transferable, registrable
and exchangeable, and such transfer shall be registrable, or (iii) there shall
have occurred and be continuing a Default or Event of Default with respect to
the Securities represented by such Global Security.

     (c) In connection with any transfer or exchange of a portion of the
beneficial interest in any Global Security to beneficial owners pursuant to
paragraph (b), the Security Registrar shall (if one or more Physical Securities
are to be issued) reflect on its books and records the date and a decrease in
the principal amount of the Global Security in an amount equal to the principal
amount of the beneficial interest in the Global Security to be transferred, and
the Company shall execute, and the Trustee shall authenticate and deliver, one
or more Physical Securities of like tenor and principal amount of authorized
denominations.

     (d) In connection with the transfer of Global Securities as an entirety to
beneficial owners pursuant to paragraph (b), the Global Securities shall be
deemed to be surrendered to the Trustee for cancellation, and the Company shall
execute, and the Trustee shall authenticate and deliver, to each beneficial
owner identified by the Depository in exchange for its beneficial interest in
the Global Securities, an equal aggregate principal amount of
<PAGE>

                                                                              61

Physical Securities of like tenor of authorized denominations.

     (e) Any Physical Security delivered in exchange for an interest in a Global
Security pursuant to paragraph (b) or (c) of this Section 312 shall, except as
otherwise provided by paragraph (d) of Section 313, bear the legend regarding
transfer restrictions applicable to the Physical Securities set forth in Exhibit
A.

     (f) The Holder of any Global Security may grant proxies and otherwise
authorize any person, including Agent Members and persons that may hold
interests through Agent 'Members, to take any action which a Holder is entitled
to take under this Indenture or the Securities.

     (g) In the event that a Global Security is exchanged for Physical
Securities pursuant to this Section 312 prior to the consummation of a
Registered Exchange Offer or the effectiveness of a Shelf Registration Statement
with respect to such Securities, such Securities may be exchanged only in
accordance with such procedures as are substantially consistent with the
provisions of Sections 312 and 313 (including the certification requirements set
forth on the reverse of the Initial Securities intended to ensure that such
transfers comply with Rule 144A, Regulation S or such other applicable exemption
from registration under the Securities Act, as the case may be) and such other
procedures as may from time to time be adopted by the Company.

     (h) Payment of principal of, premium, if any, and interest on Regulation S
Global Securities will be made in euros or in such coin or currency of the
European Union as at the time of payment is legal tender for payment of public
and private debts in immediately available funds to the Common Depositary for
Euroclear and Clearstream or its nominee, as the case may be, as the sole
registered owner and the sole holder of the Regulation S Global Securities for
all purposes under this Indenture. Payment of principal of, premium, if any, and
interest on 144A Global Securities will be made in euros or in such coin or
currency of the European Union as at the time of payment is legal tender for
payment of public and private debts in immediately available funds to the
Trustee, as custodian for DTC. On
<PAGE>

                                                                              62

the record date for any payment with respect to the 144A Global Securities, the
Trustee, as custodian for DTC, shall request that DTC provide a list of DTC
participants holding beneficial interests in the 144A Global Securities. If DTC
provides such list, the Trustee, as custodian for DTC, shall solicit wire
transfer instructions from such participants for use in connection with such
payments of principal of, premium, if any, and interest on, 144A Global
Securities. Pending disbursement by the Trustee, as custodian for DTC, funds
held by the Trustee shall not accrue interest for the benefit of participants
holding beneficial interests in the 144A Global Securities.

     (i) So long as the Securities are held in the form of Global Securities,
deposits of principal of, premium, if any, and interest on the Securities with
the Trustee, as custodian for DTC, or the Common Depositary shall be deemed to
be payment by the Company of such principal, premium, if any, and interest for
all purposes under this Indenture.

     SECTION 313.  Special Transfer Provisions.
                   ----------------------------

     (a) Transfers to Non-QIB Institutional Accredited Investors. The following
         --------------------------------------------------------
provisions shall apply with respect to the registration of any proposed transfer
of a Security to any Institutional Accredited Investor which is not a QIB
(excluding transfers to non-U.S. persons):

          (1) The Security Registrar shall register the transfer of any Security
     if (x) the requested transfer is not prior to that date which is two years
     (or such shorter period as may be prescribed by Rule 144(k) under the
     Securities Act or any successor provision thereunder) after the later of
     the original issue date of such Security (or of any Predecessor Security)
     or three months after the last day on which the Company or any Affiliate of
     the Company was the owner of such Security or any Predecessor Security or
     (y) such transfer is being made by a proposed transferor who has checked
     the box provided for on the form of Security stating, or who has otherwise
     advised the Company and the Security Registrar in writing, that the
     transfer has been made to an institutional "accredited investor" (as
     defined in Rule 501(a)(1), (2), (3) or (7) under the Securities Act) and
     the proposed transferee has delivered to the Security Registrar a
     certificate
<PAGE>

                                                                              63

     containing certain representations and agreements (the form of which
     certificate can be obtained from the Trustee or the Company), provided that
     no Initial Foreign Purchaser or any foreign purchaser who has purchased
     Securities from an Initial Foreign Purchaser or from any person other than
     a QIB or an Institutional Accredited Investor pursuant to paragraph (b)
     below shall be permitted to transfer any Securities so purchased by it to
     an Institutional Accredited Investor pursuant to this paragraph (a) prior
     to the date that is 40 days following the Issue Date.

          (2) Subject to paragraph (1) above, if (i) the proposed transferee is
     an Agent Member, and the Securities to be transferred consist of Physical
     Securities which after transfer are to be evidenced by an interest in the
     Institutional Accredited Investor Global Security, upon receipt by the
     Security Registrar of instructions given in accordance with the
     Depository's, the Common Depositary's (or Euroclear's and Clearstream's, as
     the case may be) and the Security Registrar's procedures, the Security
     Registrar shall reflect on the Security Register the date and an increase
     in the principal amount of the Institutional Accredited Investor Global
     Security in an amount equal to the principal amount of the Physical
     Securities to be transferred, and the Trustee shall cancel the Physical
     Securities so transferred, and (ii) the proposed transferor is an Agent
     Member holding a beneficial interest in a Rule 144A Global Security or a
     Regulation S Global Security, upon receipt by the Security Registrar of
     instructions given in accordance with the Depository's, the Common
     Depositary's (or Euroclear's and Clearstream's, as the case may be) and the
     Security Registrar's procedures, the Security Registrar shall reflect on
     its books and records the date of such transfer and (A) a decrease in the
     principal amount of such Rule 144A Global Security or Regulation S Global
     Security, as the case may be, in an amount equal to the principal amount
     of the beneficial interest in a Global Security to be transferred, and (B)
     an increase in the principal amount of an Institutional Accredited
     Investor Global Security in an amount equal to the principal amount to be
     transferred.
<PAGE>

                                                                              64

         (b)   Transfers to Non-U.S. Persons. The following provisions shall
               ------------------------------
apply with respect to the registration of any proposed transfer of a Security to
any non-U.S. person:

                  (1) The Security Registrar shall register the transfer of any
         Security if (x) the requested transfer is not prior to that date which
         is two years (or such shorter period as may be prescribed by Rule
         144(k) under the Securities Act or any successor provision thereunder)
         after the later of the original issue date of such Security (or of any
         Predecessor Security) or three months after the last day on which the
         Company or any Affiliate of the Company was the owner of such Security
         or any Predecessor Security or (y) such transfer is being made by a
         proposed transferor who has checked the box provided for on the form of
         Security stating, or who has otherwise advised the Company and the
         Security Registrar in writing, that the transfer has been made outside
         the U.S. in an offshore transaction within the meaning of Regulation S
         in compliance with the exemption from registration under the Securities
         Act provided by Rule 904 under the Securities Act, provided that, if
                                                            --------
         such transfer is being effected by an Initial Foreign Purchaser or any
         foreign purchaser who has purchased Securities from an Initial Foreign
         Purchaser or from any person other than a QIB or an Institutional
         Accredited Investor pursuant to this paragraph (b) prior to the date
         that is 40 days following the Issue Date, the transferee shall have
         certified to the Company and the Trustee that such transferee is a non-
         U.S. person (within the meaning of Regulation S) and that such
         transferee is acquiring the Securities in an offshore transaction
         (within the meaning of Regulation S).

                  (2) Subject to paragraph (1) above, if (i) the proposed
         transferee is an Agent Member, and the Securities to be transferred
         consist of Physical Securities which after transfer are to be evidenced
         by an interest in the Regulation S Global Security, upon receipt by the
         Security Registrar of instructions given in accordance with the
         Depository's, the Common Depositary's (or Euroclear's and
         Clearstream's, as the case may be) and the Security Registrar's
         procedures, the Security Registrar shall reflect on the Security
<PAGE>

                                                                              65

         Register the date and an increase in the principal amount of the
         Regulation S Global Security in an amount equal to the principal amount
         of the Physical Securities to be transferred, and the Trustee shall
         cancel the Physical Securities so transferred, and (ii) the proposed
         transferor is an Agent Member holding a beneficial interest in a Rule
         144A Global Security or an Institutional Accredited Investor Global
         Security, upon receipt by the Security Registrar of instructions given
         in accordance with the Depository's, the Common Depositary's (or
         Euroclear's and Clearstream's, as the case may be) and the Security
         Registrar's procedures, the Security Registrar shall reflect on its
         books and records the date of such transfer and (A) a decrease in the
         principal amount of such Rule 144A Global Security or Institutional
         Accredited Investor Global Security, as the case may be, in an amount
         equal to the principal amount to be transferred and (B) an increase in
         the principal amount of a Regulation S Global Security in an amount
         equal to the principal amount to be transferred.

         (c)  Transfers to QIBs. The following provisions shall apply with
              -----------------
respect to the registration of any proposed transfer of a Security to any QIB
(excluding transfers to non-U.S. persons):
<PAGE>

                                                                              66

                  (1) The Security Registrar shall register the transfer of any
         Security if (x) the requested transfer is not prior to that date which
         is two years (or such shorter period as may be prescribed by Rule
         144(k) under the Securities Act or any successor provision thereunder)
         after the later of the original issue date of such Security (or of any
         Predecessor Security) or three months after the last day on which the
         Company or any Affiliate of the Company was the owner of such Security
         or any Predecessor Security or (y) such transfer is being made by a
         proposed transferor who has checked the box provided for on the form of
         Security stating, or who has otherwise advised the Company and the
         Security Registrar in writing, that the transfer has been made in
         compliance with the exemption from registration under the Securities
         Act provided under Rule 144A to a transferee who has signed the
         certification provided for on the form of Security stating, or has
         otherwise advised the Company and the Security Registrar in writing,
         that such transferee represents and warrants that it is purchasing the
         Security for its own account or an account with respect to which it
         exercises sole investment discretion and that each of it and any such
         account is a QIB within the meaning of Rule 144A and is aware that the
         sale to it is being made in reliance on Rule 144A and acknowledges that
         it has received such information regarding the Company as it has
         requested pursuant to Rule 144A or has determined not to request such
         information and that it is aware that the transferor is relying upon
         the foregoing representations in order to claim the exemption from
         registration provided by Rule 144A.

                  (2) Subject to paragraph (1) above, if (i) the proposed
         transferee is an Agent Member, and the Securities to be transferred
         consist of Physical Securities which after transfer are to be evidenced
         by an interest in the Rule 144A Global Security, upon receipt by the
         Security Registrar of instructions given in accordance with the
         Depository's and the Security Registrar's procedures, the Security
         Registrar shall reflect on the Security Register the date and an
         increase in the principal amount of the Rule 144A Global Security in an
         amount equal to the principal
<PAGE>

                                                                              67

         amount of the Physical Securities to be transferred, and the Trustee
         shall cancel the Physical Securities so transferred, and (ii) the
         proposed transferor is an Agent Member holding a beneficial interest in
         an Institutional Accredited Investor Global Security or a Regulation S
         Global Security, upon receipt by the Security Registrar of instructions
         given in accordance with the Depository's and the Security Registrar's
         procedures, the Security Registrar shall reflect on its books and
         records the date of such transfer and (A) a decrease in the principal
         amount of such Institutional Accredited Investor Global Security or
         Regulation S Global Security, as the case may be, in an amount equal to
         the principal amount to be transferred and (B) an increase in the
         principal amount of a Rule 144A Global Security in an amount equal to
         the principal amount to be transferred.

         (d) Private Placement Legend. (1) Upon the registration of transfer,
             ------------------------
exchange or replacement of Securities, the Security Registrar shall deliver only
Securities that bear the Private Placement Legend unless (i) the transfer or
exchange of Initial Securities contemplated by paragraph (d)(2) or (d)(3) below
has occurred or (ii) (x) the circumstances contemplated by clause (a)(1)(x),
(b)(1)(x) or (c)(1)(x) of this Section 313 exist and (y) there is delivered to
the Security Registrar and the Trustee an Opinion of Counsel reasonably satisfac
tory to the Company and the Trustee to the effect that neither such legend nor
the related restrictions on transfer are required in order to maintain
compliance with the provisions of the Securities Act.

                  (2) After a transfer of any Initial Securities during the
         period of the effectiveness of a Shelf Registration Statement with
         respect to such Initial Securities, all requirements pertaining to
         legends on such Initial Security will cease to apply, the requirements
         requiring that any such Initial Security be issued in global form will
         cease to apply, and an Initial Security in certificated or global form
         without legends will be available to the transferee of the Holder of
         such Initial Securities upon exchange of such transferring Holder's
         certificated Initial Security. Upon the occurrence of any of the
         circumstances
<PAGE>

                                                                              68

         described in this paragraph, the Company will deliver an Officers'
         Certificate to the Trustee instructing the Trustee to issue Securities
         without legends.

               (3) Upon the consummation of a Registered Exchange Offer with
         respect to the Initial Securities pursuant to which certain Holders of
         such Initial Securities are offered Exchange Securities (other than
         Private Exchange Securities) in exchange for their Initial Securities,
         all requirements pertaining to such Initial Securities that Initial
         Securities be issued in global form will cease to apply, and
         certificated Initial Securities with the Private Placement Legend will
         be available to Holders of such Initial Securities that do not exchange
         their Initial Securities, and Exchange Securities in certificated or
         global form will be available to Holders that exchange such Initial
         Securities in such Registered Exchange Offer. Upon the occurrence of
         any of the circumstances described in this paragraph, the Company will
         deliver an Officers' Certificate to the Trustee instructing the Trustee
         to issue Securities without legends.

                  (4) Upon the consummation of a Private Exchange Offer with
         respect to the Initial Securities pursuant to which Holders of such
         Initial Securities are offered Private Exchange Securities in exchange
         for their Initial Securities, all requirements pertaining to such
         Initial Securities that Initial Securities issued to certain Holders be
         issued in global form will continue to apply, and Private Exchange
         Securities in global form will be available to Holders that exchange
         such Initial Securities in such Private Exchange Offer.

         (e) Other Transfers. If a Holder proposes to transfer a Security
             ---------------
pursuant to any exemption from the registration requirements of the Securities
Act other than as provided for by Sections 313(a), 313(b) and 313(c) and other
than pursuant to Section 313(d)(4), the Security Registrar shall only register
such transfer or exchange if such transferor delivers to the Security Registrar
and the Trustee an Opinion of Counsel satisfactory to the Company and the
Security Registrar that such transfer is in compliance with the Securities Act
and the terms of this Indenture.
<PAGE>

                                                                              69

         (f) General. By its acceptance of any Security bearing the Private
             -------
Placement Legend, each Holder of such a Security acknowledges the restrictions
on transfer of such Security set forth in this Indenture and in the Private
Placement Legend and agrees that it will transfer such Security only as provided
in this Indenture.

         The Security Registrar shall retain copies of all letters, notices and
other written communications received pursuant to Section 312 or this Section
313 for a period of two years, during which time such letters, notices and other
written communications shall at the written request of the Company be delivered
to the Company. After retaining any such copies of letters, notices and other
written communications for a period of at least two years, all such copies may
be destroyed by the Trustee. The Company shall have the right to inspect and
make copies of all such letters, notices or other written communications at any
reasonable time upon the giving of reasonable prior written notice to the
Security Registrar.

                                 ARTICLE FOUR

                          SATISFACTION AND DISCHARGE

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

         This Indenture shall cease to be of further effect (subject to Section
1206 and except as to surviving rights of registration of transfer, transfer,
exchange and replacement of Securities expressly provided for herein or pursuant
hereto) and the Trustee, at the expense of the Company, shall execute proper
instruments acknowledging satisfaction and discharge of this Indenture when

                  (1) either

                           (a) all Outstanding Securities have been
                  delivered to the Trustee for cancellation; or

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

                                    (i) have become due and payable, or
<PAGE>

                                                                              70

                                    (ii) will become due and payable within
                           one year,

                  and the Company, in the case of (i) or (ii) above, has
                  irrevocably deposited or caused to be deposited with the
                  Trustee funds in an amount sufficient to pay and discharge the
                  entire indebtedness on the Securities not theretofore
                  delivered to the Trustee for cancellation, for principal of
                  (and premium, if any, on), and interest on, the Securities to
                  Maturity;

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

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

         Notwithstanding the satisfaction and discharge of this Indenture, the
obligations under Sections 607 and 609 and, if money shall have been deposited
with the Trustee pursuant to clause (1)(b) of this Section 401, the obligations
of the Trustee under Section 402 and the last paragraph of Section 1003 shall
survive.

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

         Subject to the provisions of the last paragraph of Section 1003, all
money deposited with the Trustee pursuant to Section 401 shall be held in trust
and applied by it, in accordance with the provisions of the 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 thereto, of the principal (and premium, if
any) and interest for whose payment such money has been deposited with the
Trustee; but such money need not be segregated from other funds except to the
extent required by law.
<PAGE>

                                                                              71

                                 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) failure to pay principal of (or premium, if any, on) any
         Security when due; or

                  (2) failure to pay any interest on any Security when due,
         continued for 30 days; or

                  (3) default in the payment of principal of (and premium, if
         any) and interest on Securities required to be purchased pursuant to an
         Offer to Purchase pursuant to Section 1009 when due and payable; or

                  (4) failure to perform or comply with the provisions of
         Section 801, 803 or 1016; or

                  (5) failure to perform any covenant or agreement of the
         Company or any Guarantor in this Indenture or in any Security (other
         than a covenant a default in whose performance is elsewhere in this
         Section specifically dealt with) continued for 60 days after written
         notice to the Company by the Trustee or Holders of at least 25% in
         aggregate principal amount of the Outstanding Securities, which notice
         shall specify the default and state that such notice is a "Notice of
         Default" hereunder; or

                  (6) default under the terms of any instrument evidencing or
         securing Debt of the Company or any Restricted Subsidiary having an
         outstanding principal amount of not less than $25,000,000 or its
         foreign currency equivalent at the time which default results in the
         acceleration of the payment of such indebtedness or constitutes the
         failure to pay such indebtedness
<PAGE>

                                                                              72

         when due (after expiration of any applicable grace period); or

                  (7) the rendering of a judgment or judgments against the
         Company or any Restricted Subsidiary in an aggregate amount in excess
         of $25,000,000 or its foreign currency equivalent at the time and shall
         not be waived, satisfied or discharged for any period of 45 consecutive
         days during which a stay of enforcement shall not be in effect; or

                  (8) any Restricted Subsidiary Guarantee ceases to be in full
         force and effect (other than in accordance with the terms of such
         Restricted Subsidiary Guarantee) or any Guarantor denies or disaffirms
         its obligations under its Restricted Subsidiary Guarantee; or

                  (9) the entry of a decree or order by a court having
         jurisdiction in the premises 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 the
         Federal Bankruptcy Code or any other applicable federal, state or
         foreign law, or appointing a receiver, liquidator, assignee, trustee,
         custodian or 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 unstayed and in effect for a
         period of 60 consecutive days; or

                  (10) the institution by the Company or any Significant
         Subsidiary of proceedings to be adjudicated a bankrupt or insolvent, or
         the consent by it to the institution of bankruptcy or insolvency
         proceedings against it, or the filing by it of a petition or answer or
         consent seeking reorganization or relief under the Federal Bankruptcy
         Code or any other applicable federal, state or foreign law, or the
         consent by it to the filing of any such petition or to the appointment
         of a receiver, liquidator, assignee, trustee, custodian or sequestrator
         (or other similar official) of the Company or any Significant
         Subsidiary or of any
<PAGE>

                                                                              73

         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.

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

         If an Event of Default (other than an Event of Default specified in
Section 501(9) or 501(10) with respect to the Company) shall occur and be
continuing, the Trustee or the Holders of not less than 25% in aggregate
principal amount of the Outstanding Securities may declare the principal 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 principal amount shall become immediately due and payable. If
an Event of Default specified in Section 501(9) or 501(10) occurs with respect
to the Company, the principal amount of all the Securities shall ipso facto
                                                                 ---- -----
become immediately due and payable without any declaration or other act on the
part of the Trustee or any Holder.

         At any time after a declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter provided in this Article Five, 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 Outstanding
                  Securities,

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

                                                                              74

                           (C) to the extent that payment of such interest is
                  lawful, interest on overdue interest at the 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 nonpayment of
         amounts of principal of (or premium, if any, on) 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

                  (a) default is made in the payment of any interest
         on any Security when due, continued for 30 days, or

                  (b) default is made in the payment of the
         principal of (or premium, if any, on) any Security when
         due,

the Company will, upon demand of the Trustee, pay to the Trustee 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 interest on any
overdue principal (and premium, if any) and, to the extent that payment of such
interest shall be legally enforceable, upon any overdue installment of interest,
at the rate borne by the Securities, and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

         If the Company fails to pay such amounts forthwith upon such demand,
the Trustee, in its own name as trustee of an express trust, may institute a
judicial proceeding for the
<PAGE>

                                                                              75

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
effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.

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

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

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

                                                                              76

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

and any custodian, receiver, assignee, trustee, liquidator or 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 the Trustee any amount due it for the reasonable compensation, expenses,
disbursements and advances of the Trustee and its agents and counsel, and any
other amounts due the Trustee under Section 607.

         Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the 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.

         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
and as trustee of an express trust, and any recovery of judgment shall, after
provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee and its agents and counsel, be for the
ratable benefit of the Holders of the Securities in respect of which such
judgment has been recovered.
<PAGE>

                                                                              77

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

         Any money collected by the Trustee pursuant to this Article Five 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:

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

                  SECOND: To the payment of the amounts then due and unpaid for
         principal of (and premium, if any) and interest on the 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; and

                  THIRD:  The balance, if any, to the Person or
         Persons entitled thereto.

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

         No Holder of any Securities shall have any right to institute any
proceeding with respect to this Indenture or for any other remedy hereunder,
unless

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

                  (2) the Holders of not less than 25% in aggregate principal
         amount of the Outstanding Securities shall have made written request
         and offered reasonable indemnity to the Trustee to institute such
         proceeding as trustee; and

                  (3) the Trustee shall not have received from the Holders of a
         majority in aggregate principal amount of the Outstanding Securities a
         direction inconsistent
<PAGE>

                                                                              78

         with such request and shall have failed to institute such proceeding
         within 60 days;

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

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

         Notwithstanding any other provision in this Indenture, including
Section 507, the Holder of any Security shall have the right, which is absolute
and unconditional, to receive payment as provided herein (including, if
applicable, Article Twelve) and in such Security 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 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.
<PAGE>

                                                                              79

         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 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 Five 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,

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

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

                                                                              80

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

         The Holders of not less than a majority in principal amount of the
Outstanding Securities may, on behalf of the Holders of all the Securities,
waive any past Default hereunder and its consequences, except a Default

                  (1) in the payment of the principal of (or
         premium, if any) or interest on any Security, 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.

         The Company shall deliver to the Trustee an Officers' Certificate
stating that the requisite majority have consented to such waiver and attaching
such consents upon which, subject to Section 104, the Trustee may conclusively
rely. Upon any such waiver, such default shall cease to exist, and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other
default or Event of Default or impair any right consequent thereon.

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

         The Company covenants (to the extent that it may lawfully do so) that
it shall 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 shall not hinder, delay or impede the execution of any
power herein granted to the Trustee, but shall suffer and permit the execution
of every such power as though no such law had been enacted.
<PAGE>

                                                                              81

                                  ARTICLE SIX

                                  THE TRUSTEE

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

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

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

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

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

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

          (1)  this paragraph (c) shall not be construed to limit the effect of
     paragraph (a) of this Section 601;

          (2)  the Trustee shall not be liable for any error of judgment
     made in good faith by a Responsible
<PAGE>

                                                                              82

     Officer, unless it shall be proved that the Trustee was negligent in
     ascertaining the pertinent facts;

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

          (4)  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 indemnity reasonably satisfactory
     to it against such risk or liability is not reasonably assured to it.

     (d)  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 601.

     SECTION 602.  Notice of Default.
                   ------------------

     If a Default occurs and is continuing, the Trustee shall transmit, in
the manner and to the extent provided in TIA Section 313(c), notice of such
Default within 60 days after it is known to any Responsible Officer of the
Trustee or written notice of it is received by the Trustee; provided, however,
                                                            --------  -------
that, except in the case of a Default in the payment of the principal of (or
premium, if any) or interest on any Security, the Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee, a trust committee of directors or Responsible Officers of the Trustee
in good faith determines that the withholding of such notice is in the interest
of the Holders.
<PAGE>

                                                                              83

          The Trustee is not required to take notice or deemed to have
notice of any Event of Default with respect to the Securities, except an Event
of Default under Section 501(1), (2), (3) or (4) hereof (provided that in the
case of Section 501(4), such Event of Default constitutes a failure to purchase
Securities pursuant to an Offer to Purchase pursuant to Section 1016), unless
the Trustee shall have received written notice at its Corporate Trust Office
(which notice shall reference the Securities, the Company and the Indenture) of
such Event of Default from the Company or any Holder or unless a Responsible
Officer of the Trustee shall otherwise have knowledge thereof.

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

     Subject to Section 601 and to the provisions of TIA Sections 315(a)
through 315(d):

          (1)  the Trustee may conclusively rely and shall be fully
     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;

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

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

          (4)  the Trustee may consult with counsel and the written
     advice of such counsel or any Opinion of Counsel shall be full and complete
     authorization and protection in respect of any action taken, suffered or
<PAGE>

                                                                              84

     omitted by it hereunder in good faith and in reliance thereon;

          (5)  the Trustee may act through counsel, agents, custodians
     and nominees and shall not be responsible for the misconduct or negligence
     of any such person appointed and supervised with due care and in good
     faith;

          (6)  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 security or indemnity reasonably
     satisfactory to it against the costs, expenses and liabilities which might
     be incurred by it in compliance with such request or direction;

          (7)  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; and

          (8)  the Trustee shall not be liable for any action taken,
     suffered or omitted by it in good faith and believed by it to be authorized
     or within the discretion or rights or powers conferred upon it by this
     Indenture.
<PAGE>

                                                                              85

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

      The recitals contained herein and in the Securities, except for the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture or of the Securities, except that the Trustee represents that it is
duly authorized to execute and deliver this Indenture, authenticate the
Securities and perform its obligations hereunder. 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 or any other
agent of the Company or of the Trustee, in its individual or any other capacity,
may become the owner or pledgee of Securities and, subject to TIA Sections
310(b) and 311, may otherwise deal with the Company with the same rights it
would have if it were not Trustee, Paying Agent, 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 such compensation
     as shall be agreed in writing between the Company and the Trustee 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
<PAGE>

                                                                              86

     reasonable expenses, disbursements and advances incurred or made by the
     Trustee in accordance with any provision of this Indenture (including the
     reasonable compensation and the expenses and disbursements of its agents
     and counsel), except any such expense, disbursement or advance as may be
     attributable to the Trustee's negligence, willful misconduct or bad faith;
     and

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

     The obligations of the Company under this Section 607 to compensate the
Trustee, to pay or reimburse the Trustee for expenses, disbursements and
advances and to indemnify and hold harmless the Trustee shall constitute
additional indebtedness hereunder. As security for the performance of such
obligations of the Company, the Trustee shall have a claim prior to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of (and premium, if any,
on) or interest on particular Securities.

     When the Trustee incurs expenses or renders services in connection with
an Event of Default specified in Section 501(9) or (10), the expenses (including
the reasonable charges and expenses of its counsel) of and the compensation for
such services are intended to constitute expenses of administration under any
applicable federal, state or foreign bankruptcy, insolvency or other
similar law.

     The provisions of this Section 607 shall survive the termination of
this Indenture or the earlier resignation or removal of the Trustee.
<PAGE>

                                                                              87

     SECTION 608.  Corporate Trustee Required; Eligibility; Conflicting
                   ----------------------------------------------------
Interests.
----------
     (a)  There shall be at all times a Trustee hereunder which shall be
subject to and comply with the provisions of Section 310(a)(1) of the Trust
Indenture Act and shall have a combined capital and surplus of at least
$50,000,000. If such Person publishes reports of condition at least annually,
pursuant to law or to the requirements of federal, state, territorial or
District of Columbia supervising or examining authority, then, for the purposes
of this Section 608, 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 a Responsible Officer of the
Trustee shall have actual knowledge that the Trustee ceases to be eligible in
accordance with the provisions of this Section 608, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article Six.

     (b)  The Trustee shall be subject to and comply with Section 310(b) of
the Trust Indenture Act.

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

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

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

     (c)  The Trustee may be removed at any time by Act of the Holders of not
less than a majority in aggregate principal amount of the Outstanding
Securities, delivered to the Trustee and to the Company.
<PAGE>

                                                                              88

     (d)  If at any time:

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

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

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

then, in any such case, (i) the Company, by a Board Resolution, may remove the
Trustee or (ii) subject to TIA Section 315(e), any Holder who has been a bona
fide Holder of a 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 a Board Resolution, shall promptly appoint a successor Trustee. If
the Company does not promptly appoint a successor Trustee 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
aggregate principal amount of the Outstanding Securities delivered to the
Company and the retiring Trustee. In either case, 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
<PAGE>

                                                                              89

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 the Holders of
Securities in the manner provided for in Section 106. Each notice shall include
the name of the successor Trustee and the address of its Corporate Trust Office.

     (g)  The retiring Trustee shall not be liable for any of the acts or
omissions of any successor Trustee appointed hereunder.

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

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

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

                                                                              90

     Any Person into which the Trustee may be merged or converted or with
which it may be consolidated, or any Person resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any Person
succeeding to all or substantially all of the corporate trust business of the
Trustee, shall be the successor of the Trustee hereunder; provided that such
                                                          --------
Person shall be otherwise qualified and eligible under this Article Six, 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, consolidation or transfer of assets 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. In case at that time any of the Securities shall not have been
authenticated, any successor Trustee may authenticate such Securities either in
the name of any predecessor hereunder or in the name of the successor Trustee.
In all such cases such certificates shall have the full force and effect which
this Indenture provides that the certificate of authentication of the Trustee
shall have; provided, however, that the right to adopt the certificate of
            --------  -------
authentication of any predecessor Trustee or to authenticate Securities in the
name of any predecessor Trustee shall apply only to its successor or successors
by merger, conversion, consolidation or transfer of assets.
<PAGE>

                                                                              91

                                 ARTICLE SEVEN

               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

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

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

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

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

     A copy of each such report at the time of its mailing to Holders shall
be filed with the Commission and the principal national securities exchange (if
any) on which the Securities are listed.

     The Company shall notify a Responsible Officer of the Trustee if the
Securities become listed on any national securities exchange or of any delisting
thereof.

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

     The Company shall file with the Trustee and deliver to the Holders of
Securities the reports and other information required to be provided by it
pursuant to Section 1007.
<PAGE>

                                                                              92

                                 ARTICLE EIGHT

             CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

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

     The Company shall not, in a single transaction or a series of related
transactions, (i) consolidate with or merge into any other Person or Persons or
permit any other Person to consolidate with or merge into the Company or (ii)
directly or indirectly, transfer, sell, lease, convey or otherwise dispose of
all or substantially all its assets to any other Person or Persons, unless:

          (1)  in a transaction in which the Company is not the surviving
     Person or in which the Company transfers, sells, leases, conveys or
     otherwise disposes of all or substantially all of its assets to any other
     Person, the resulting, surviving or transferee Person (the "successor
     entity") is 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 before and after giving effect to such transaction
     and treating any Debt which becomes an obligation of the Company (or the
     successor entity) or a Restricted Subsidiary as a result of such
     transaction as having been Incurred by the Company or such Restricted
     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 the successor entity) is equal to
     or greater than that of the Company immediately prior to the transaction;

          (4)  immediately after giving effect to such transaction and
     treating any Debt which becomes an obligation of the Company (or the
     successor entity) or
<PAGE>

                                                                              93

     a Restricted Subsidiary as a result of such transaction as having been
     Incurred by the Company or such Restricted Subsidiary at the time of the
     transaction, the Company (or the successor entity) could Incur at least
     $1.00 of additional Debt pursuant to the provisions of paragraph (a) of
     Section 1010;

          (5)  if, as a result of any such transaction, Property of the
     Company (or the successor entity) or any Restricted Subsidiary would
     become subject to a Lien prohibited by the provisions of Section 1014,
     the Company (or the successor entity) shall have secured the Securities
     as required by said covenant;

          (6)  in the case of a transfer, sale, lease, conveyance or
     other disposition of all or substantially all of the assets of the Company,
     such assets shall have been transferred as an entirety or virtually as an
     entirety to one Person and such Person shall have complied with all the
     provisions of this paragraph; and

          (7)  the Company has delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each in form and substance
     reasonably satisfactory to the Trustee, stating that such consolidation,
     merger, transfer, sale, lease, conveyance or other disposition 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 Officers' Certificate,
     setting forth the manner of determination of the Consolidated Net Worth, in
     accordance with clause (3) of this Section 801, of the Company or, if
     applicable, of the successor entity as required pursuant to the foregoing.

     SECTION 802.  Successor Company Substituted.
                   ------------------------------
<PAGE>

                                                                              94

     Upon any consolidation of the Company with or merger of the Company
with or into any other Person or any transfer, sale, lease, conveyance or other
disposition of all or substantially all the assets of the Company to any Person
or Persons in accordance with Section 801, the successor Person formed by such
consolidation or into which the Company is merged or to which such transfer,
sale, lease, conveyance or other disposition 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 the predecessor Company (which term shall for this
purpose mean the Person named as the "Company" in the first paragraph of this
Indenture or any successor Person which shall have become such in the manner
described in Section 801), except in the case of a lease, shall be released from
all its obligations and covenants under this Indenture and the Securities and
may be dissolved and liquidated.

     SECTION 803.  Guarantor May Consolidate, etc., Only on Certain Terms.
                   -------------------------------------------------------

     The Company shall not permit any Guarantor to, in a single transaction
or a series of related transactions, (i) consolidate with or merge into any
other Person or Persons (other than the Company or another Guarantor) or permit
any other Person (other than the Company or another Guarantor) to consolidate
with or merge into such Guarantor or (ii) directly or indirectly, transfer,
sell, lease, convey or otherwise dispose of all or substantially all its assets
to any other Person or Persons (other than the Company or another Guarantor),
unless:

          (1)  in a transaction in which such Guarantor is not the
     surviving Person or in which such Guarantor transfers, sells, leases,
     conveys or otherwise disposes of all or substantially all of its assets to
     any other Person, the resulting, surviving or transferee Person (the
     "successor guarantor") is 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 such Guarantor's
     obligations under this Indenture;
<PAGE>

                                                                              95

          (2)  immediately before and after giving effect to such
     transaction and treating any Debt which becomes an obligation of the
     Company or a Restricted Subsidiary (including the successor guarantor) as a
     result of such transaction as having been Incurred by the Company or such
     Restricted 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 is equal to or greater than that of
     the Company immediately prior to the transaction;

          (4)  immediately after giving effect to such transaction and
     treating any Debt which becomes an obligation of the Company or a
     Restricted Subsidiary (including the successor guarantor) as a result of
     such transaction as having been Incurred by the Company or such Restricted
     Subsidiary at the time of the transaction, the Company could Incur at least
     $1.00 of additional Debt pursuant to the provisions of paragraph (a) of
     Section 1010;

          (5)  if, as a result of any such transaction, Property of the
     Company or any Restricted Subsidiary (including the successor guarantor)
     would become subject to a Lien prohibited by the provisions of Section
     1014, the Company shall have secured the Securities as required by said
     covenant;

          (6)  in the case of a transfer, sale, lease, conveyance or
     other disposition of all or substantially all of the assets of such
     Guarantor, such assets shall have been transferred as an entirety or
     virtually as an entirety to one Person and such Person shall have complied
     with all the provisions of this paragraph; and

          (7)  the Company has delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each in form and substance
     reasonably satisfactory to the Trustee, stating that such consolidation,
     merger, transfer, sale, lease, conveyance or other disposition and, if a
     supplemental indenture is required in
<PAGE>

                                                                              96

     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 Officers' Certificate, setting forth the manner of determination of
     the Consolidated Net Worth, in accordance with clause (3) of this Section
     803, of such Guarantor or, if applicable, of the successor guarantor as
     required pursuant to the foregoing.

     SECTION 804.  Successor Guarantor Substituted.
                   --------------------------------

     Upon any consolidation of a Guarantor with or merger of a Guarantor
with or into any other Person or any transfer, sale, lease, conveyance or other
disposition of all or substantially all the assets of a Guarantor to any Person
or Persons in accordance with Section 803, the successor Person formed by such
consolidation or into which such Guarantor is merged or to which such transfer,
sale, lease, conveyance or other disposition is made shall succeed to, and be
substituted for, and may exercise every right and power of, such Guarantor under
this Indenture with the same effect as if such successor Person had been named
as a Guarantor herein, and the predecessor Guarantor (which term shall for this
purpose mean the Person named as the "New Guarantor" in the first paragraph of
the applicable supplemental indenture or any successor Person which shall have
become such in the manner described in Section 803), except in the case of a
lease, shall be released from all its obligations and covenants under its
Restricted Subsidiary Guarantee and the Securities and may be dissolved and
liquidated.
<PAGE>

                                                                              97

                                 ARTICLE NINE

                            SUPPLEMENTAL INDENTURES

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

         The Company and the Trustee may, at any time and from time to time,
without notice to or consent of any Holders of Securities, enter into one or
more indentures supplemental hereto:

                  (1) to evidence the succession of another Person to the
         Company or a Guarantor and the assumption by such successor of the
         covenants of the Company or such Guarantor 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 conferred upon the Company hereby; or

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

                  (4) to provide for uncertificated Securities in
         addition to or in place of certificated Securities; or

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

                  (6) to secure the Securities; or

                  (7) to comply with the Trust Indenture Act or the
         Securities Act (including Regulation S promulgated
         thereunder); or

                  (8) to add additional Guarantees with respect to the
         Securities or to release Guarantors from Restricted Subsidiary
         Guarantees as provided by the terms of this Indenture; or

                  (9) to cure any ambiguity herein, to correct or supplement any
         provision herein which may be inconsistent with any other provision
         herein, or to add any other provision with respect to matters or
         questions arising under this Indenture; provided such
                                                 --------
<PAGE>

                                                                              98

         actions shall not adversely affect the interests of the Holders in any
         material respect; or

                  (10) to make any change to Section 312 of this Indenture or
         the Securities relating to book-entry procedures for Global Securities
         to facilitate trading or transferring the Securities in book-entry
         form.

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

         With the consent of the Holders of not less than a majority in
principal amount of the Outstanding Securities, by Act of such Holders delivered
to the Company and the Trustee, the Company and the Trustee may enter into one
or more 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 waiving or otherwise modifying in any manner the rights of the
Holders, provided 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 interest thereon that would be due and payable
         upon the Stated Maturity thereof, 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

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

                  (3) subordinate in right of payment, or otherwise
         subordinate, the Securities to any other Debt; or
<PAGE>

                                                                              99

                  (4) except as otherwise provided herein, release any security
         interest that may have been granted in favor of the Holders of the
         Securities; or

                  (5) reduce the premium payable upon a Change of Control
         Triggering Event or, at any time after a Change of Control Triggering
         Event has occurred, change the time at which the Offer to Purchase
         relating thereto must be made or at which the Securities must be
         repurchased pursuant to such Offer to Purchase; or

                  (6) at any time after the Company is obligated to make an
         Offer to Purchase with the Net Available Proceeds from Asset
         Dispositions, change the time at which such Offer to Purchase must be
         made or at which the Securities must be repurchased pursuant thereto;
         or

                  (7) make any change in any Restricted Subsidiary
         Guarantee that would adversely affect the Holders of
         the Securities; or

                  (8) modify any provision of this Section 902 (except to
         increase any percentage set forth herein).

         It shall not be necessary for any Act of Holders under this Section 902
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 Nine or the modifications
thereby of the trusts created by this Indenture, the Trustee shall be entitled
to receive, and shall be fully protected in relying upon, an Opinion of Counsel
stating that the execution of such supplemental indenture is authorized or
permitted by this Indenture and an Officers' Certificate stating that all
conditions precedent to the execution of such supplemental indenture have been
fulfilled. 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.
<PAGE>

                                                                             100

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

         Upon the execution of any supplemental indenture under this Article
Nine, 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 Nine
shall conform as a matter of contract or law to the requirements of the Trust
Indenture Act as then in effect.

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

         Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article Nine may bear a notation in form
approved by the Trustee and the Company 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.

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

         Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to this Article Nine, the Company shall give
notice thereof to the Holders of each Outstanding Security affected, in the
manner provided for in Section 106, setting forth in general terms the substance
of such supplemental indenture.
<PAGE>

                                                                             101

                                  ARTICLE TEN

                                   COVENANTS

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

         The Company covenants and agrees for the benefit of the Holders that it
shall 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 shall maintain in The City of 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 Corporate Trust Office of the Trustee shall be such
office or agency of the Company, unless the Company shall designate and maintain
some other office or agency for one or more of such purposes. The Company shall
give prompt written notice to the Trustee of any change in the location of any
such office or agency. If at any time the Company shall fail to maintain any
such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the Corporate Trust Office of the Trustee, and the Company hereby
appoints the Trustee as its agent to receive all such presentations, surrenders,
notices and demands.

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

                                                                             102

any such designation or rescission and any change in the location of any such
other office or agency.

         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 shall,
on or before each due date of the principal of (or 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 of (or premium,
if any) or interest so becoming due until such sums shall be paid to such
Persons or otherwise disposed of as herein provided and shall promptly notify
the Trustee of its action or failure so to act.

         Whenever the Company shall have one or more Paying Agents for the
Securities, it shall, on or before each due date of the principal of (or
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 of such action or
any failure so to act.

         The Company shall 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 1003,
that such Paying Agent shall:

                  (1) hold all sums held by it for the payment of the principal
         of, 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, premium, if any, or interest;
<PAGE>

                                                                             103

                  (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

                  (4) indemnify the Trustee and its officers, directors,
         employees and agents against any loss, cost or liability caused by, or
         incurred as a result of, such Paying Agent's acts or omissions.

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

         Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of, premium, if any,
or interest on any Security and remaining unclaimed for two years after such
principal, premium or interest has become due and payable shall be paid to the
Company on Company Request or (if then held by the Company) shall be discharged
from such trust; and the Holder of such 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, 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.
<PAGE>

                                                                             104

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

         Subject to Article Eight, the Company shall do or cause to be done all
things necessary to preserve and keep in full force and effect the corporate
existence, rights (charter and statutory) and franchises of the Company and each
Subsidiary of the Company; provided, however, that the Company shall not be
                           --------  -------
required to preserve, with respect to the Company, any such right or franchise
or, with respect to any such Subsidiary (subject to all the other covenants in
this Indenture), any such corporate existence, right or franchise, if the Board
of Directors shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Company and its Subsidiaries as
a whole and that the loss thereof is not disadvantageous in any material respect
to the Holders.

         SECTION 1005.  Maintenance of Properties.
                        --------------------------

         The Company shall cause all properties owned by the Company or any
Restricted Subsidiary or used or held for use in the conduct of its business or
the business of any Restricted Subsidiary to be maintained and kept in good
condition, repair and working order and supplied with all necessary equipment
and shall 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 1005 shall prevent the Company from discontinuing the
maintenance of any of such properties if such discontinuance is, in the judgment
of the Company, desirable in the conduct of its business or the business of any
Subsidiary and not disadvantageous in any material respect to the Holders.
<PAGE>

                                                                             105

         SECTION 1006.  Insurance.
                        ----------

         The Company shall at all times keep all of its and its Restricted
Subsidiaries' properties which are of an insurable nature insured with insurers,
believed by the Company to be responsible, against loss or damage to the extent
that property of similar character is usually so insured by companies similarly
situated and owning like properties.

         SECTION 1007.  Reports.
                        --------

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

         SECTION 1008.  Statement by Officers as to Default.
                        ------------------------------------
<PAGE>

                                                                             106

         (a) The Company shall deliver to the Trustee, on the date of delivery
of each annual report to be delivered pursuant to Section 1007, a brief
certificate from the principal executive officer, principal financial officer or
principal accounting officer as to his or her knowledge of the Company's
compliance during the period covered by such report with all conditions and
covenants under this Indenture. If the signer has knowledge of any noncompliance
that occurred during such period, the certificate shall describe its status and
what action the Company has taken or is taking or proposes to take with respect
thereto. For purposes of this Section 1008(a), such compliance shall be
determined without regard to any period of grace or requirement of notice under
this Indenture.

         (b) When any Default has occurred and is continuing under this
Indenture, or if the trustee for or the holder of any other evidence of Debt of
the Company or any Restricted Subsidiary gives any notice or takes any other
action with respect to a claimed default (other than with respect to Debt in the
principal amount of less than $25,000,000 or its foreign currency equivalent at
the time), the Company shall, within 30 days of such occurrence, notice or other
action, deliver to the Trustee by registered or certified mail or by telegram,
telex or facsimile transmission an Officers' Certificate specifying such event,
notice or other action, its status and what action the Company is taking or
purposes to take with respect thereto.

         SECTION 1009.  Change of Control Triggering Event.
                        -----------------------------------

         (a) Upon the occurrence of a Change of Control Triggering Event, each
Holder shall have the right to require that the Company repurchase such Holder's
Securities in whole or in part in integral multiples of (EURO) 1,000, in
accordance with the procedures set forth in this Section 1009 and this
Indenture.

         (b) Within 30 days of the occurrence of both a Change of Control and a
Rating Decline with respect to the Securities (a "Change of Control Triggering
Event"), the Company will be required to make an Offer to Purchase all
Outstanding Securities at a price in cash equal to 101% of the principal amount
of the Securities on the purchase date, plus accrued and unpaid interest (if
any) to such purchase
<PAGE>

                                                                             107

date (subject to the right of Holders of record on the relevant record date to
receive interest due on the relevant interest payment date).

         (c) The Company and the Trustee shall perform their respective
obligations for the Offer to Purchase as specified in the Offer. Prior to the
Purchase Date, the Company shall (i) accept for payment Securities or portions
thereof tendered pursuant to the Offer, (ii) irrevocably 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 (provided that such deposit
may be made no later than 10:00 A.M. New York City time on the Purchase Date if
the Company elects) 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. In the event
that the aggregate Purchase Price is less than the amount delivered by the
Company to the Trustee or the Paying Agent, the Trustee or the Paying Agent, as
the case may be, shall deliver the excess to the Company immediately after the
Purchase Date.

         (d)  A "Change of Control" means the occurrence of any of the following
events:
<PAGE>

                                                                             108

                  (i) if any "person" or "group" (as such terms are used in
         Sections 13(d) and 14(d) of the Exchange Act or any successor
         provisions to either of the foregoing), including any group acting for
         the purpose of acquiring, holding, voting or disposing of securities
         within the meaning of Rule 13d-5(b)(1) under the Exchange Act, other
         than any one or more of the Permitted Holders, becomes the "beneficial
         owner" (as defined in Rule 13d-3 under the Exchange Act, except that a
         person will be deemed to have "beneficial ownership" of all shares that
         any such person has the right to acquire, whether such right is
         exercisable immediately or only after the passage of time), directly or
         indirectly, of 35% or more of the total voting power of the Voting
         Stock of the Company; provided, however, that the Permitted Holders are
                               --------  -------
         the "beneficial owners" (as defined in Rule 13d-3 under the Exchange
         Act, except that a person will be deemed to have "beneficial ownership"
         of all shares that any such person has the right to acquire, whether
         such right is exercisable immediately or only after the passage of
         time), directly or indirectly, in the aggregate of a lesser percentage
         of the total voting power of the Voting Stock of the Company than such
         other person or group (for purposes of this clause (i), such person or
         group shall be deemed to beneficially own any Voting Stock of a
         corporation (the "specified corporation") held by any other corporation
         (the "parent corporation") so long as such person or group beneficially
         owns, directly or indirectly, in the aggregate a majority of the total
         voting power of the Voting Stock of such parent corporation); or

                  (ii) the sale, transfer, assignment, lease, conveyance or
         other disposition, directly or indirectly, of all or substantially all
         the assets of the Company and the Restricted Subsidiaries, considered
         as a whole (other than a disposition of such assets as an entirety or
         virtually as an entirety to a Wholly Owned Restricted Subsidiary or one
         or more Permitted Holders) shall have occurred; or

                  (iii) during any period of two consecutive years, individuals
         who at the beginning of such period constituted the Board of Directors
         (together with any
<PAGE>

                                                                             109

         new directors whose election or appointment by such board or whose
         nomination for election by the shareholders of the Company was approved
         by a vote of a majority of the directors then still in office who were
         either directors at the beginning of such period or whose election or
         nomination for election was previously so approved) cease for any
         reason to constitute a majority of the Board of Directors then in
         office; or

                  (iv) the shareholders of the Company shall have approved any
         plan of liquidation or dissolution of the Company.

         (e) The Company shall not be required to make an Offer to Purchase upon
a Change of Control Triggering Event if a third party makes the Offer to
Purchase in the manner, at the times and otherwise in compliance with the
requirements set forth in this Indenture applicable to an Offer to Purchase made
by the Company and purchases all Securities validly tendered and not withdrawn
under such Offer to Purchase.

         (f) In the event that the Company makes an Offer to Purchase the
Securities, the Company shall 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. To the extent that the provisions of any
securities laws or regulations conflict with provisions of this Section, the
Company shall comply with the applicable securities laws and regulations and
shall not be deemed to have breached its obligations under this
Section by virtue thereof.
<PAGE>

                                                                             110

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

         (a) The Company shall not, and shall not permit any Restricted
Subsidiary to, directly or indirectly, Incur any Debt, unless, after giving pro
forma effect to such Incurrence and the receipt and application of the net
proceeds thereof, no Default or Event of Default would occur as a consequence of
such Incurrence or be continuing following such Incurrence and either (i) the
ratio of (A) the aggregate consolidated principal amount (or, in the case of
Debt issued at a discount, the then-Accreted Value) of Debt of the Company and
its Restricted Subsidiaries 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 or repaid since such balance
sheet date and the receipt and application of the net proceeds thereof, to (B)
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, would be less than 5.0 to 1.0, or (ii) the
Company's Consolidated Capital Ratio as of the most recent available quarterly
or annual balance sheet, after giving pro forma effect to (x) the Incurrence of
such Debt and any other Debt Incurred or repaid since such balance sheet date,
(y) the issuance of any Capital Stock (other than Disqualified Stock) of the
Company since such balance sheet date, including the issuance of any Capital
Stock to be issued concurrently with the Incurrence of such Debt, and (z) the
receipt and application of the net proceeds of such Debt or Capital Stock, as
the case may be, is less than 2.25 to 1.0.

         (b) Notwithstanding the foregoing limitation, the Company or any
Restricted Subsidiary may Incur any and all of the following (each of which
shall be given independent effect):

                  (i) Debt under the Securities, this Indenture or
         any Restricted Subsidiary Guarantee;

                  (ii) Debt under Credit Facilities in an aggregate principal
         amount outstanding or available (together with all refinancing Debt
         outstanding or available pursuant to clause (viii) below in respect of
         Debt previously Incurred pursuant to this clause (ii)) at
<PAGE>

                                                                             111

         any one time not to exceed the greater of (x) $750,000,000, which
         amount shall be permanently reduced by the amount of Net Available
         Proceeds used to repay Debt under the Credit Facilities, and not
         reinvested in Telecommunications/IS Assets or used to purchase
         Securities or repay other Debt, pursuant to and as permitted by Section
         1016, and (y) 85% of the Eligible Receivables;

                  (iii) Purchase Money Debt, provided that the amount of such
                                             --------
         Purchase Money Debt does not exceed 100% of the cost of the
         construction, installation, acquisition, lease, development or
         improvement of the applicable Telecommunications/IS Assets;

                  (iv) Subordinated Debt of the Company; provided, however, that
                                                         --------  -------
         the aggregate principal amount (or, in the case of Debt issued at a
         discount, the Accreted Value) of such Debt, together with any other
         outstanding Debt Incurred pursuant to this clause (iv), shall not
         exceed $500,000,000 at any one time (which amount shall be permanently
         reduced by the amount of Net Available Proceeds used to repay
         Subordinated Debt of the Company, and not reinvested in
         Telecommunications/IS Assets or used to purchase Securities or repay
         other Debt, pursuant to and as permitted by Section 1016), except to
         the extent such Debt in excess of $500,000,000 (A) is subordinated to
         all other Debt of the Company other than Debt Incurred pursuant to this
         clause (iv) in excess of such $500,000,000 limitation, (B) does not
         provide for the payment of cash interest on such Debt prior to the
         Stated Maturity of the Securities and (C) (1) does not provide for
         payments of principal of such Debt at stated maturity 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 the acceleration of any payment with respect to such Debt
         upon any event of default thereunder), in each case on or prior to the
         Stated Maturity of the Securities, and (2) does not permit redemption
         or other retirement (including pursuant to an offer to purchase
<PAGE>

                                                                             112

         made by the Company but excluding through conversion into Capital Stock
         of the Company, other than Disqualified Stock, without any payment by
         the Company or its Restricted Subsidiaries to the holders thereof other
         than in respect of fractional shares) of such Debt at the option of the
         holder thereof on or prior to the Stated Maturity of the Securities;

                     (v) Debt outstanding on the Measurement Date;
                    (vi) 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 (x) upon the transfer, conveyance 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 (y) if for any reason such Restricted Subsidiary ceases to
         be a Restricted Subsidiary, the provisions of this clause (vi) shall no
         longer be applicable to such Debt and such Debt shall be deemed to have
         been Incurred by the issuer thereof at the time of such transfer,
         conveyance or other disposition or when such Restricted Subsidiary
         ceases to be a Restricted Subsidiary;

                   (vii) Debt Incurred by a Person prior to the time (A) such
         Person became a Restricted Subsidiary, (B) such Person merges into or
         consolidates with a Restricted Subsidiary or (C) another Restricted
         Subsidiary merges into or consolidates with such Person (in a
         transaction in which such Person becomes a Restricted Subsidiary),
         which Debt was not Incurred in anticipation of such transaction and was
         outstanding prior to such transaction;

                  (viii) Debt Incurred to renew, extend, refinance, defease,
         repay, prepay, repurchase, redeem, retire, exchange or refund (each, a
         "refinancing") Debt Incurred pursuant to clause (i), (ii), (iii), (v),
         (vii) or (xii) of this paragraph (b) or this clause (viii), in an
         aggregate principal amount (or if issued at a discount, the
         then-Accreted Value) not to exceed the aggregate principal amount (or
         if issued at a discount, the then-Accreted Value) of and accrued
<PAGE>

                                                                             113

         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 Board of Directors as necessary to accomplish such
         refinancing by means of a tender offer or privately negotiated
         repurchase, plus the expenses of the Company Incurred in connection
         with such refinancing; provided, however, that (A) the refinancing Debt
                                --------  -------
         shall not be senior in right of payment to the Debt that is being
         refinanced and (B) in the case of any refinancing of Debt Incurred
         pursuant to clause (i), (v), (vii) or (xii) or, if such Debt previously
         refinanced Debt Incurred pursuant to any such clause, this clause
         (viii), 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 stated maturity
         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 the acceleration of any payment with
         respect to 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 (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 time the
         same are required by the terms of the Debt being refinanced, other
         than, in the case of clause (x) or (y), any such payment, 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 pursuant to provisions
         substantially similar to those described under Section 1009;

                  (ix) Debt (A) in respect of performance, surety or appeal
         bonds, Guarantees, letters of credit or reimbursement obligations
         Incurred or provided in the ordinary course of business securing the
         performance of contractual, franchise, lease, self-insurance or
<PAGE>

                                                                             114

         license obligations and not in connection with the Incurrence of Debt
         or (B) in respect of customary agreements providing for
         indemnification, adjustment of purchase price after closing, or similar
         obligations, or from Guarantees or letters of credit, surety bonds or
         performance bonds securing any such obligations of the Company or any
         of its Restricted Subsidiaries pursuant to such agreements, Incurred in
         connection with the disposition of any business, assets or Restricted
         Subsidiary of the Company (other than Guarantees of Indebtedness
         Incurred by any Person acquiring all or any portion of such business,
         assets or Restricted Subsidiary of the Company for the purpose of
         financing such acquisition) and in an aggregate principal amount not to
         exceed the gross proceeds actually received by the Company or any
         Restricted Subsidiary in connection with such disposition;

                  (x)  Debt consisting of Permitted Interest Rate or
         Currency Protection Agreements;

                 (xi)  Debt not otherwise permitted to be Incurred pursuant to
         clauses (i) through (x) above or clause (xii) below, which, together
         with any other outstanding Debt Incurred pursuant to this clause (xi),
         has an aggregate principal amount not in excess of $50,000,000 at any
         time outstanding; and

                (xii)  Issue Date Purchase Money Debt and Debt under the
         Existing Notes, the New Convertible Notes, the Dollar Notes, the Euro
         Notes and the related indentures and any restricted subsidiary
         Guarantees issued in accordance with such related indentures.

         (c) Notwithstanding any other provision of this Section 1010, the
maximum amount of Debt that the Company or a Restricted Subsidiary may Incur
pursuant to this Section 1010 shall not be deemed to be exceeded due solely to
the result of fluctuations in the exchange rates of currencies.

         (d) For purposes of determining any particular amount of Debt under
this Section 1010, (i) Guarantees, Liens or obligations with respect to letters
of credit supporting Debt otherwise included in the determination of such
<PAGE>

                                                                             115

particular amount shall not be included and (ii) any Liens granted for the
benefit of the Securities pursuant to the provisions referred to in the first
paragraph of Section 1014 shall not be treated as Debt. For purposes of
determining any particular amount of Debt under this Section 1010, if any such
Debt denominated in a different currency is subject to a currency agreement that
constitutes a Permitted Interest Rate or Currency Protection Agreement with
respect to U.S. dollars covering all principal of, premium, if any, and interest
payable on such Debt, the amount of such Debt expressed in U.S. dollars will be
as provided in such currency agreement. For purposes of determining compliance
with this Section 1010, in the event that an item of Debt meets the criteria of
more than one of the types of Debt described in the above clauses, the Company,
in its sole discretion, shall classify such item of Debt and only be required to
include the amount and type of such Debt in one of such clauses.

         SECTION 1011.  Limitation on Debt of Restricted Subsidiaries.
                        ----------------------------------------------

         The Company shall not permit any Restricted Subsidiary that is not a
Guarantor to Incur any Debt except any and all of the following (each of which
shall be given independent effect):

                    (i)  Restricted Subsidiary Guarantees;

                   (ii)  Debt outstanding on the Measurement Date;

                  (iii)  Debt of Restricted Subsidiaries under Credit Facilities
         permitted to be Incurred pursuant to clause (ii) of paragraph (b) of
         Section 1010;

                   (iv)  Purchase Money Debt of Restricted Subsidiaries
         permitted to be Incurred pursuant to clause (iii) of paragraph (b) of
         Section 1010;

                    (v)  Debt owed by a Restricted Subsidiary to the Company or
         a Restricted Subsidiary of the Company permitted to be Incurred
         pursuant to clause (vi) of paragraph (b) of Section 1010;
<PAGE>

                                                                             116

                   (vi)  Debt of Restricted Subsidiaries consisting of Permitted
         Interest Rate or Currency Protection Agreements permitted to be
         Incurred pursuant to clause (x) of paragraph (b) of Section 1010;

                  (vii)  Debt of Restricted Subsidiaries permitted to be
         Incurred under clause (vii) of paragraph (b) of Section 1010 or Issue
         Date Purchase Money Debt permitted to be Incurred under clause (xii) of
         paragraph (b) of Section 1010;

                 (viii)  Debt of Restricted Subsidiaries permitted to
         be Incurred under clause (ix) or (xi) of paragraph (b)
         of Section 1010; and

                   (ix)  Debt which is Incurred to refinance any Debt of a
         Restricted Subsidiary permitted to be Incurred pursuant to clauses (i),
         (ii), (iii), (iv) and (vii) of this paragraph or this clause (ix), in
         an aggregate principal amount (or if issued at a discount, the then-
         Accreted Value) not to exceed the aggregate principal amount (or if
         issued at a discount, the then-Accreted Value) of 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
         Board of Directors 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 applicable Restricted Subsidiary
         Incurred in connection therewith; provided, however, that, in the case
                                           --------  -------
         of any refinancing of Debt Incurred pursuant to clause (i), (ii) or
         (vii) or, if such Debt previously refinanced Debt Incurred pursuant to
         any such clause, this clause (ix), the refinancing Debt by its terms,
         or by the terms of any agreement or instrument pursuant to which such
         Debt is Incurred, (x) does not provide for payments of principal at the
         stated maturity of such Debt or by way of a sinking fund applicable to
         such Debt or by way of any mandatory redemption, defeasance, retirement
         or repurchase of such Debt by the Company or any Restricted Subsidiary
         (including any redemption, retirement or repurchase which is contingent
         upon events or circumstances, but excluding any retirement required by
         virtue of
<PAGE>

                                                                             117

         acceleration of such Debt upon an event of default thereunder), in each
         case prior to the time the same are required by the terms of the Debt
         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 such Debt at the option of the holder thereof
         prior to the stated maturity of the Debt being refinanced, other than,
         in the case of clause (x) or (y), any such payment, redemption or other
         retirement (including pursuant to an offer to purchase made by the
         Company or a Restricted Subsidiary) which is conditioned upon the
         change of control of the Company pursuant to provisions substantially
         similar to those contained in Section 1009.

         Notwithstanding any other provision of this Section 1011, the maximum
amount of Debt that a Restricted Subsidiary may Incur pursuant to this Section
1011 shall not be deemed to be exceeded due solely as the result of fluctuations
in the exchange rates of currencies.

         For purposes of determining any particular amount of Debt under this
Section 1011, Guarantees, Liens or obligations with respect to letters of credit
supporting Debt otherwise included in the determination of such particular
amount shall not be included. For purposes of determining compliance with this
Section 1011, in the event that an item of Debt meets the criteria of more than
one of the types of Debt described in the above clauses, the Company, in its
sole discretion, shall classify such item of Debt and only be required to
include the amount and type of such Debt in one of such clauses.

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

<PAGE>

                                                                             118

     (a)  The Company (i) shall not, and shall not permit any Restricted
Subsidiary to, directly or indirectly, declare or pay any dividend, or make any
distribution, in respect of its Capital Stock or to the holders thereof,
excluding any dividends or distributions which are made solely to the Company or
a Restricted Subsidiary (and, if such Restricted Subsidiary is not a Wholly
Owned Subsidiary, to the other stockholders of such Restricted Subsidiary on a
pro rata basis or on a basis that results in the receipt by the Company or a
Restricted Subsidiary of dividends or distributions of greater value than it
would receive on a pro rata basis) or any dividends or distributions payable
solely in shares of Capital Stock of the Company (other than Disqualified Stock)
or in options, warrants or other rights to acquire Capital Stock of the Company
(other than Disqualified Stock); (ii) shall not, and shall not permit any
Restricted Subsidiary to, purchase, redeem, or otherwise retire or acquire for
value (x) any Capital Stock of the Company or any Restricted Subsidiary of the
Company or (y) any options, warrants or rights to purchase or acquire shares of
Capital Stock of the Company or any Restricted Subsidiary or any securities
convertible or exchangeable into shares of Capital Stock of the Company or any
Restricted Subsidiary, except, in any such case, any such purchase, redemption
or retirement or acquisition for value (A) paid to the Company or a Restricted
Subsidiary (or, in the case of any such purchase, redemption or other retirement
or acquisition for value with respect to a Restricted Subsidiary that is not a
Wholly Owned Subsidiary, to the other stockholders of such Restricted Subsidiary
on a pro rata basis or on a basis that results in the receipt by the Company or
a Restricted Subsidiary of payments of greater value than it would receive on a
pro rata basis) or (B) paid solely in shares of Capital Stock (other than
Disqualified Stock) of the Company; (iii) shall not make, or permit any
Restricted Subsidiary to make, any Investment (other than an Investment in the
Company or a Restricted Subsidiary or a Permitted Investment) in any Person,
including the Designation of any Restricted Subsidiary as an Unrestricted
Subsidiary, or the Revocation of any such Designation, according to Section
1019; (iv) shall not, and shall 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
<PAGE>

                                                                             119

in right of payment to the Securities (other than any redemption, defeasance,
repurchase, retirement or other acquisition or retirement for value made in
anticipation of satisfying a scheduled maturity, repayment or sinking fund
obligation due within one year thereof); and (v) shall not, and shall not permit
any Restricted Subsidiary to, issue, transfer, convey, sell or otherwise dispose
of Capital Stock of any Restricted Subsidiary to a Person other than the Company
or another Restricted Subsidiary if the result thereof is that such Restricted
Subsidiary shall cease to be a Restricted Subsidiary, in which event the amount
of such "Restricted Payment" shall be the Fair Market Value of the remaining
interest, if any, in such former Restricted Subsidiary held by the Company and
the other Restricted Subsidiaries (each of clauses (i) through (v) being a
"Restricted Payment") if: (1) an Event of Default, or an event that with the
passing of time or the giving of notice, or both, would constitute an Event of
Default, shall have occurred and be continuing, or (2) upon giving effect to
such Restricted Payment, the Company could not Incur at least $1.00 of
additional Debt pursuant to paragraph (a) of Section 1010, or (3) upon giving
effect to such Restricted Payment, the aggregate of all Restricted Payments made
on or after the Measurement Date, including Restricted Payments made pursuant to
clause (A) or (B) of the proviso at the end of this sentence, and Permitted
Investments made on or after the Measurement Date pursuant to clause (i) or (j)
of the definition thereof (the amount of any such Restricted Payment or
Permitted Investment, if made other than in cash, to be based upon Fair Market
Value) exceeds the sum of: (a) 50% of cumulative Consolidated Net Income (or, in
the case that Consolidated Net Income shall be negative, 100% of such negative
amount) since the end of the last full fiscal quarter prior to the Measurement
Date through the last day of the last full fiscal quarter ending at least 45
days prior to the date of such Restricted Payment and (b) plus, in the case of
any Revocation made after the Measurement Date, an amount equal to the lesser of
the portion (proportionate to the Company's equity interest in the Subsidiary to
which such Revocation relates) of the Fair Market Value of the net assets of
such Subsidiary at the time of Revocation and the amount of Investments
previously made (and treated as a Restricted Payment) by the Company or any
Restricted Subsidiary in such Subsidiary; provided, however, that the Company or
                                          --------  -------
a Restricted Subsidiary of the Company
<PAGE>

                                                                             120

may, without regard to the limitations in clause (3) but subject to clauses (1)
and (2), make (A) Restricted Payments in an aggregate amount not to exceed the
sum of $50,000,000 and the aggregate net cash proceeds received after the
Measurement Date (i) as capital contributions to the Company, from the issuance
(other than to a Subsidiary or an employee stock ownership plan or trust
established by the Company or any such Subsidiary for the benefit of their
employees) of Capital Stock (other than Disqualified Stock) of the Company, and
(ii) from the issuance or sale of Debt of the Company or any Restricted
Subsidiary (other than to a Subsidiary, the Company or an employee stock
ownership plan or trust established by the Company or any such Subsidiary for
the benefit of their employees) that after the Measurement Date has been
converted into or exchanged for Capital Stock (other than Disqualified Stock) of
the Company and (B) Investments in Persons engaged in the Telecommunications/IS
Business in an aggregate amount not to exceed the after-tax gain on the sale,
after the Measurement Date, of Special Assets to the extent sold for cash, Cash
Equivalents, Telecommunications/IS Assets or the assumption of Debt of the
Company or any Restricted Subsidiary (other than Debt that is subordinated to
the Securities or any applicable Restricted Subsidiary Guarantee) and release
of the Company and all Restricted Subsidiaries from all liability on the Debt
assumed. The aggregate net cash proceeds referred to in the immediately
preceding clauses (A)(i) and (A)(ii) shall not be utilized to make Restricted
Payments pursuant to such clauses to the extent such proceeds have been utilized
to make Permitted Investments under clause (i) of the definition of "Permitted
Investments."

     (b)  Notwithstanding the foregoing limitation, (i) the Company may pay
any dividend on Capital Stock of any class of the Company 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; provided, however, that at the time of such payment of such
            --------  -------
dividend, no other Event of Default shall have occurred and be continuing (or
result therefrom); (ii) the Company may repurchase any shares of its Common
Stock or options to acquire its Common Stock from Persons who were formerly
directors, officers or employees of the Company or any of its Subsidiaries or
other Affiliates in an amount not to exceed $3,000,000 in any 12-month period;
<PAGE>

                                                                             121

(iii) the Company and any Restricted Subsidiary may refinance any Debt otherwise
permitted by clause (viii) of paragraph (b) of Section 1010 or clause (ix) of
Section 1011; (iv) the Company and any Restricted Subsidiary may retire or
repurchase any Capital Stock of the Company or of any Restricted Subsidiary or
any Subordinated Debt of the Company in exchange for, or out of the proceeds of
the substantially concurrent sale (other than to a Subsidiary of the Company or
an employee stock ownership plan or trust established by the Company or any such
Subsidiary for the benefit of their employees) of, Capital Stock (other than
Disqualified Stock) of the Company, provided that the proceeds from any such
                                    --------
exchange or sale of Capital Stock shall be excluded from any calculation
pursuant to clause (A)(i) in the proviso at the end of paragraph (a) above or
pursuant to clause (b) of the definition of "Invested Capital"; and (v) the
Company may pay cash dividends in any amount not in excess of $50,000,000 in any
12-month period in respect of Preferred Stock of the Company (other than
Disqualified Stock). The Restricted Payments described in the foregoing clauses
(i), (ii) and (v) shall be included in the calculation of Restricted Payments;
the Restricted Payments described in clauses (iii) and (iv) shall be excluded in
the calculation of Restricted Payments.

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

     (a)  The Company shall not, and shall 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 (other than pursuant
to law or regulation) on the ability of any Restricted Subsidiary (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 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 to the Company or
any other Restricted Subsidiary.

     (b)  Notwithstanding the foregoing limitation, the Company may, and may
permit any Restricted Subsidiary to, create or otherwise cause or suffer to
exist (i) any
<PAGE>

                                                                             122

encumbrance or restriction pursuant to any agreement in effect on the
Measurement Date, (ii) any customary (as conclusively determined in good faith
by the Chief Financial Officer of the Company) encumbrance or restriction
applicable to a Restricted Subsidiary that is contained in an agreement or
instrument governing or relating to Debt contained in any Credit Facilities or
Purchase Money Debt, provided that such encumbrances and restrictions permit the
                     --------
distribution of funds to the Company in an amount sufficient for the Company to
make the timely payment of interest, premium (if any) and principal (whether at
stated maturity, by way of a sinking fund applicable thereto, by way of any
mandatory redemption, defeasance, retirement or repurchase thereof, including
upon the occurrence of designated events or circumstances or by virtue of
acceleration upon an event of default, or by way of redemption or retirement at
the option of the holder of the Debt, including pursuant to offers to purchase)
according to the terms of this Indenture and the Securities and other Debt that
is solely an obligation of the Company, but provided further that such agreement
                                            ----------------
may nevertheless contain customary (as so determined) net worth, leverage,
invested capital and other financial covenants, customary (as so determined)
covenants regarding the merger of or sale of all or any substantial part of the
assets of the Company or any Restricted Subsidiary, customary (as so determined)
restrictions on transactions with affiliates and customary (as so determined)
subordination provisions governing Debt owed to the Company or any Restricted
Subsidiary, (iii) any encumbrance or restriction 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, (iv) any encumbrance or restriction pursuant to an
agreement effecting a refinancing of Debt Incurred pursuant to an agreement
referred to in clause (i), (ii) or (iii) of this paragraph (b), provided,
                                                                --------
however, that the provisions contained in such agreement relating to such
-------
encumbrance or restriction are no more restrictive (as so determined) in any
material respect than the provisions contained in the agreement the subject
thereof, (v) in the case of clause (iii) of paragraph (a) above, any encumbrance
or restriction contained in any security agreement (including a Capital Lease
Obligation) securing Debt of the Company or a Restricted Subsidiary otherwise
permitted under this
<PAGE>

                                                                             123

Indenture, but only to the extent such restrictions restrict the transfer of the
Property subject to such security agreement, (vi) in the case of clause (iii) of
paragraph (a) above, customary provisions (A) that restrict the subletting,
assignment or transfer of any Property that is a lease, license, conveyance or
similar contract, (B) contained in asset sale or other asset disposition
agreements limiting the transfer of the Property being sold or disposed of
pending the closing of such sale or disposition or (C) arising or agreed to in
the ordinary course of business, not relating to any Debt, and that do not,
individually or in the aggregate, detract from the value of Property of the
Company or any Restricted Subsidiary in any manner material to the Company or
any Restricted Subsidiary, (vii) any encumbrance or restriction with respect to
a Restricted Subsidiary 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 Property of such Restricted Subsidiary, provided that the consummation
of such transaction would not result in a Default or an Event of Default, that
such restriction terminates if such transaction is abandoned and that the
consummation or abandonment of such transaction occurs within one year of the
date such agreement was entered into, and (viii) any encumbrance or restriction
pursuant to this Indenture and the Securities.

     SECTION 1014.  Limitation on Liens.
                    --------------------

     The Company shall not, and shall not permit any Restricted Subsidiary to,
directly or indirectly, Incur or suffer to exist any Lien on or with respect to
any Property now owned or acquired after the Measurement Date to secure any Debt
without making, or causing such Restricted Subsidiary to make, effective
provision for securing the Securities (x) equally and ratably with 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 or a Guarantor which is subordinate in right of
payment to the Securities or the applicable Restricted Subsidiary Guarantee,
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 Measurement Date and securing Debt
<PAGE>

                                                                             124

outstanding on the Measurement Date or Incurred by the Company or a Restricted
Subsidiary on or after the Measurement Date pursuant to any Credit Facility to
secure Debt permitted to be Incurred by the Company or such Restricted
Subsidiary pursuant to clause (ii) of paragraph (b) under Section 1010; (ii)
Liens securing Debt in an amount which, together with the aggregate amount of
Debt then outstanding or available under all Credit Facilities (together with
all refinancing Debt then outstanding or available pursuant to clause (viii) of
paragraph (b) of Section 1010 in respect of Debt previously Incurred under
Credit Facilities), 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 the Company's 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 Restricted
Subsidiary; provided, however, that any subsequent issue or transfer of Capital
            --------  -------
Stock or other event that results in any such Restricted Subsidiary ceasing to
be a Restricted Subsidiary or any subsequent transfer of the Debt secured by any
such Lien (except to the Company or a Restricted Subsidiary) shall be deemed, in
each case, to constitute the Incurrence of such Lien by the issuer thereof; (iv)
Liens Incurred by the Company or a Restricted Subsidiary to secure Purchase
Money Debt permitted to be Incurred by the Company or such Restricted Subsidiary
pursuant to clause (iii) of paragraph (b) under Section 1010, provided that any
                                                              --------
such Lien may not extend to any Property other than the Telecommunications/IS
Assets installed, constructed, acquired, leased, developed or improved with the
proceeds of such Purchase Money Debt and any improvements or accessions thereto
(it being understood that all Debt to any single lender or group of related
lenders or outstanding under any single credit facility, and in any case
relating to the same group or collection of Telecommunications/IS Assets
financed thereby, 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 that (a) such Lien attaches to the acquired Property prior to the time
--------
of the acquisition of such Property and (b) such Lien does not extend to or
cover any other Property; (vi) Liens to secure Debt Incurred to
<PAGE>

                                                                             125

refinance, in whole or in part, Debt secured by any Lien referred to in the
foregoing clauses (i), (iv) and (v) or this clause (vi) so long as such Lien
does not extend to any other Property (other than improvements and accessions to
the original Property) and the principal amount of Debt so secured is not
increased except as otherwise permitted under clause (viii) of paragraph (b) of
Section 1010 or clause (ix) of Section 1011; (vii) Liens not otherwise permitted
by the foregoing clauses (i) through (vi) securing Debt in an aggregate amount
not to exceed 5% of the Company's Consolidated Tangible Assets; (viii) Liens
granted after the Issue Date pursuant to this Section 1014 to secure the
Securities; and (ix) Permitted Liens.

     SECTION 1015. Limitation on Sale and Leaseback Transactions.
                   ---------------------------------------------

     The Company shall not, and shall not permit any Restricted Subsidiary to,
directly or indirectly, enter into, assume, Guarantee or otherwise become liable
with respect to any Sale and Leaseback Transaction, unless (i) the Company or
such Restricted Subsidiary would be entitled to Incur (a) Debt in an amount
equal to the Attributable Value of the Sale and Leaseback Transaction pursuant
to Section 1010 and (b) a Lien pursuant to Section 1014, equal in amount to the
Attributable Value of the Sale and Leaseback Transaction, without also securing
the Securities, and (ii) the Sale and Leaseback Transaction is treated as an
Asset Disposition and all of the conditions of Section 1016 (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 as Net Available
Proceeds for purposes of such Section 1015.

     SECTION 1016.  Limitation on Asset Dispositions.
                    ---------------------------------
<PAGE>

                                                                             126

     The Company shall not, and shall not permit any Restricted Subsidiary to,
make any Asset Disposition 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 Property sold or disposed of as determined by
the Board of Directors in good faith and evidenced by a Board Resolution filed
with the Trustee; and (ii) at least 75% of the consideration for such
disposition consists of cash or Cash Equivalents or the assumption of Debt of
the Company or any Restricted Subsidiary (other than Debt that is subordinated
to the Securities or any applicable Restricted Subsidiary Guarantee) and release
of the Company and all Restricted Subsidiaries from all liability on the Debt
assumed (or if less than 75%, the remainder of such consideration consists of
Telecommunications/IS Assets); provided, however, that, to the extent such
                               --------  -------
disposition involves Special Assets, all or any portion of the consideration
may, at the Company's election, consist of Property other than cash, Cash
Equivalents, the assumption of Debt or Telecommunications/IS Assets.

     The Net Available Proceeds (or any portion thereof) from Asset Dispositions
may be applied by the Company or a Restricted Subsidiary, to the extent the
Company or such Restricted Subsidiary elects (or is required by the terms of any
Debt): (1) to the permanent repayment or reduction of Debt then outstanding
under any Credit Facility, to the extent such Credit Facility would require such
application or prohibit payments pursuant to the Offer to Purchase described in
the following paragraph (other than Debt owed to the Company or any Affiliate of
the Company); or (2) to reinvest in Telecommunications/IS Assets (including by
means of an Investment in Telecommunications/IS Assets by a Restricted
Subsidiary with Net Available Proceeds received by the Company or another
Restricted Subsidiary).

     Any Net Available Proceeds from an Asset Disposition not applied in
accordance with the preceding paragraph within 360 days (or, in the case of a
disposition of Special Assets identified in clause (a) of the definition thereof
in which the Net Available Proceeds exceed $500,000,000, 540 days) from the date
of the receipt of such Net Available Proceeds shall constitute "Excess
Proceeds." When the aggregate amount of Excess Proceeds exceeds $10,000,000, the
<PAGE>

                                                                             127

Company will be required to make an Offer to Purchase with such Excess Proceeds
on a pro rata basis according to principal amount (or, in the case of Debt
issued at a discount, the then-Accreted Value) for (x) Outstanding Securities at
a price in cash equal to 100% of the principal amount of the Securities on the
purchase date plus accrued and unpaid interest (if any) thereon (subject to the
right of Holders of record on the relevant record date to receive interest due
on the relevant interest payment date) and (y) any other Debt of the Company or
any Guarantor that is pari passu with the Securities, or any Debt of a
                      ---- -----
Restricted Subsidiary that is not a Guarantor, at a price no greater than 100%
of the principal amount thereof plus accrued and unpaid interest (if any) to the
purchase date (or 100% of the then-Accreted Value plus accrued and unpaid
interest (if any) to the purchase date in the case of original issue discount
Debt), to the extent, in the case of this clause (y), required under the terms
thereof (other than Debt owed to the Company or any Affiliate of the Company).
To the extent there are any remaining Excess Proceeds following the completion
of the Offer to Purchase, the Company shall apply such Excess Proceeds to the
repayment of other Debt of the Company or any Restricted Subsidiary, to the
extent permitted or required under the terms thereof. Any other remaining Excess
Proceeds may be applied to any use as determined by the Company which is not
otherwise prohibited by this Indenture, and the amount of Excess Proceeds shall
be reset to zero.

     The Company and the Trustee shall perform their respective obligations for
the Offer to Purchase as specified in the Offer. Prior to the Purchase Date, the
Company shall (i) accept for payment Securities or portions thereof tendered
pursuant to the Offer, (ii) irrevocably 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 (provided that such deposit may be
made no later than 10:00 A.M. New York City time on the Purchase Date if the
Company elects) 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
<PAGE>

                                                                             128

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. In the event that the aggregate Purchase Price is less than the amount
delivered by the Company to the Trustee or the Paying Agent, the Trustee or the
Paying Agent, as the case may be, shall deliver the excess to the Company
immediately after the Purchase Date.

     Not later than the date upon which written notice of an Offer to Purchase
is delivered to the Trustee, the Company shall deliver to the Trustee an
Officers' Certificate as to (i) the amount of the Offer, (ii) the allocation of
the Net Available Proceeds from the Asset Disposition pursuant to which such
Offer is being made and (iii) the compliance of such allocation with the
provisions of this Section 1016.

     In the event that the Company makes an Offer to Purchase the Securities,
the Company shall 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. To the extent that the provisions of any securities laws or
regulations conflict with provisions of this Section, the Company shall comply
with the applicable securities laws and regulations and shall not be deemed to
have breached its obligations under this Section by virtue thereof.

     SECTION 1017. Limitation on Issuance and Sales of Capital Stock of
                   ----------------------------------------------------
Restricted Subsidiaries.
-----------------------
<PAGE>

                                                                             129

     The Company shall not, and shall not permit any Restricted Subsidiary to,
issue, transfer, convey, sell or otherwise dispose of any shares of Capital
Stock of a Restricted Subsidiary or securities convertible or exchangeable into,
or options, warrants, rights or any other interest with respect to, Capital
Stock of a Restricted Subsidiary to any Person other than the Company or a
Restricted Subsidiary except (i) a sale of all of the Capital Stock of such
Restricted Subsidiary owned by the Company and any Restricted Subsidiary that
complies with the provisions of Section 1016 to the extent such provisions
apply, (ii) in a transaction that results in such Restricted Subsidiary becoming
a Joint Venture, provided (x) such transaction complies with the provisions of
                 --------
Section 1016 to the extent such provisions apply and (y) the remaining interest
of the Company or any other Restricted Subsidiary in such Joint Venture would
have been permitted as a new Restricted Payment or Permitted Investment under
the provisions of Section 1012, (iii) the issuance, transfer, conveyance, sale
or other disposition of shares of such Restricted Subsidiary so long as after
giving effect to such transaction such Restricted Subsidiary remains a
Restricted Subsidiary and such transaction complies with the provisions of
Section 1016 to the extent such provisions apply, (iv) the transfer, conveyance,
sale or other disposition of shares required by applicable law or regulation,
(v) if required, the issuance, transfer, conveyance, sale or other disposition
of directors' qualifying shares, (vi) Disqualified Stock issued in exchange
for, or upon conversion of, or the proceeds of the issuance of which are used to
refinance, 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 or refinanced, (vii) in a
transaction where the Company or a Restricted Subsidiary acquires at the same
time not less than its Proportionate Interest in such issuance of Capital Stock,
(viii) Capital Stock issued and outstanding on the Measurement Date, (ix)
Capital Stock of a Restricted Subsidiary issued and outstanding prior to the
time that such Person becomes a Restricted Subsidiary so long as such Capital
Stock was not issued in contemplation of such Person's becoming a Restricted
Subsidiary or otherwise being
<PAGE>

                                                                             130

acquired by the Company and (x) an issuance of Preferred Stock of a Restricted
Subsidiary (other than Preferred Stock convertible or exchangeable into Common
Stock of any Restricted Subsidiary) otherwise permitted by this Indenture. In
the event of (a) the consummation of a transaction referred to in any of the
foregoing clauses that results in a Guarantor no longer being a Restricted
Subsidiary and (b) the execution and delivery of a supplemental indenture
providing for such release in form satisfactory to the Trustee, any such
Guarantor shall be released from all its obligations under its Restricted
Subsidiary Guarantee.

     SECTION 1018.  Transactions with Affiliates.
                    -----------------------------
<PAGE>

                                                                             131

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, sell, lease, transfer, or otherwise
dispose of any of its Property to, or purchase any Property from, or enter into
any contract, agreement, understanding, loan, advance, Guarantee or transaction
(including the rendering of services) with or for the benefit of, any Affiliate
(each of the foregoing, an "Affiliate Transaction"), unless (a) such Affiliate
Transaction or series of Affiliate Transactions is (i) in the best interest of
the Company or such Restricted Subsidiary and (ii) on terms that are no less
favorable to the Company or such Restricted Subsidiary than those that would
have been obtained in a comparable arm's-length transaction by the Company or
such Restricted Subsidiary with a Person that is not an Affiliate (or, in the
event that there are no comparable transactions involving Persons who are not
Affiliates of the Company or the relevant Restricted Subsidiary to apply for
comparative purposes, is otherwise on terms that, taken as a whole, the Company
has determined to be fair to the Company or the relevant Restricted Subsidiary)
and (b) the Company delivers to the Trustee (i) with respect to any Affiliate
Transaction or series of Affiliate Transactions involving aggregate payments in
excess of $10,000,000 but less than $15,000,000, a certificate of the chief
executive, operating or financial officer of the Company evidencing such
officer's determina tion that such Affiliate Transaction or series of Affiliate
Transactions complies with clause (a) above and (ii) with respect to any
Affiliate Transaction or series of Affiliate Transactions involving aggregate
payments equal to or in excess of $15,000,000, a Board Resolution certifying
that such Affiliate Transaction or series of Affiliate Transactions complies
with clause (a) above and that such Affiliate Transaction or series of Affiliate
Transactions has been approved by the Board of Directors, including a majority
of the disinterested members of the Board of Directors, provided that, in the
                                                        --------
event that there shall not be at least two disinterested members of the Board of
Directors with respect to the Affiliate Transaction, the Company shall, in
addition to such Board Resolution, file with the Trustee a written opinion from
an investment banking firm of national standing in the United States which, in
the good faith judgment of the Board of Directors, is independent with respect
to the Company and its Affiliates and qualified to perform such task, which
opinion
<PAGE>

                                                                             132

shall be to the effect that the consideration to be paid or received in
connection with such Affiliate Transaction is fair, from a financial point of
view, to the Company or such Restricted Subsidiary.

     Notwithstanding the foregoing, the following shall not be deemed Affiliate
Transactions: (i) any employment agreement entered into by the Company or any of
its Restricted Subsidiaries in the ordinary course of business and consistent
with industry practice; (ii) any agreement or arrangement with respect to the
compensation of a director or officer of the Company or any Restricted
Subsidiary approved by a majority of the disinterested members of the Board of
Directors and consistent with industry practice; (iii) transactions between or
among the Company and its Restricted Subsidiaries, provided that no more than 5%
                                                   --------
of the Voting Stock (on a fully diluted basis) of any such Restricted Subsidiary
is owned by an Affiliate of the Company (other than a Restricted Subsidiary);
(iv) Restricted Payments and Permitted Investments permitted by Section 1012
(other than Investments in Affiliates that are not the Company or Restricted
Subsidiaries); (v) transactions pursuant to the terms of any agreement or
arrangement as in effect on the Measurement Date; and (vi) transactions with
respect to wireline or wireless transmission capacity, the lease or sharing or
other use of cable or fiber optic lines, equipment, rights-of-way or other
access rights, between the Company (or any Restricted Subsidiary) and any other
Person, provided that, in the case of this clause (vi), such transaction
        --------
complies with clause (a) in the immediately preceding paragraph.

     SECTION 1019. Limitation on Designations of Unrestricted Subsidiaries.
                   -------------------------------------------------------

     The Company shall not designate any Subsidiary of the Company (other than a
newly created Subsidiary in which no Investment has previously been made) as an
"Unrestricted Subsidiary" under this Indenture (a "Designation") unless:

          (a)  no Default or Event of Default shall have occurred and be
     continuing at the time of or after giving effect to such Designation;
<PAGE>

                                                                             133

          (b)  immediately after giving effect to such Designation, the Company
     would be able to Incur $1.00 of Debt under paragraph (a) of Section 1010;
     and

          (c)  the Company would not be prohibited under any provision of this
     Indenture from making an Investment at the time of Designation (assuming
     the effectiveness of such Designation) in an amount (the "Designation
     Amount") equal to the portion (proportionate to the Company's equity
     interest in such Restricted Subsidiary) of the Fair Market Value of the net
     assets of such Restricted Subsidiary on such date.

     In the event of any such Designation, the Company shall be deemed to have
made an Investment constituting a Restricted Payment pursuant to Section 1012
for all purposes of this Indenture in the Designation Amount; provided, however,
                                                              --------  -------
that, upon a Revocation of any such Designation of a Subsidiary, the Company
shall be deemed to continue to have a permanent "Investment" in an Unrestricted
Subsidiary of an amount (if positive) equal to (i) the Company's "Investment" in
such Subsidiary at the time of such Revocation less (ii) the portion
(proportionate to the Company's equity interest in such Subsidiary) of the Fair
Market Value of the net assets of such Subsidiary at the time of such
Revocation. At the time of any Designation of any Subsidiary as an Unrestricted
Subsidiary, such Subsi diary shall not own any Capital Stock of the Company or
any Restricted Subsidiary. In addition, neither the Company nor any Restricted
Subsidiary shall at any time (x) provide credit support for, or a Guarantee of,
any Debt of any Unrestricted Subsidiary (including any undertaking, agree ment
or instrument evidencing such Debt); provided that the Company or a Restricted
                                     --------
Subsidiary may pledge Capital Stock or Debt of any Unrestricted Subsidiary on a
nonrecourse basis such that the pledgee has no claim whatsoever against the
Company other than to obtain such pledged Capital Stock or Debt, (y) be directly
or indirectly liable for any Debt of any Unrestricted Subsidiary or (z) be
directly or 111 indirectly liable for any Debt which provides that the holder
thereof may (upon notice, lapse of time or both) declare a default thereon or
cause the payment thereof to be accelerated or payable prior to its final
scheduled maturity upon the occurrence of a default with respect to any Debt,
Lien or other obligation of any Unrestricted Subsidiary
<PAGE>

                                                                             134

(including any right to take enforcement action against such Unrestricted
Subsidiary), except in the case of clause (x) or (y) to the extent permitted
under Sections 1012 and 1018.

     Unless Designated as an Unrestricted Subsidiary, any Person that becomes a
Subsidiary of the Company will be classified as a Restricted Subsidiary;
provided, however, that such Subsidiary shall not be designated as a Restricted
--------  -------
Subsidiary and shall be automatically classified as an Unrestricted Subsidiary
if either of the requirements set forth in clauses (a) and (b) of the
immediately following paragraph will not be satisfied immediately following such
classification. Except as provided in the first sentence of this Section 1019,
no Restricted Subsidiary may be redesig nated as an Unrestricted Subsidiary.

     A Designation may be revoked (a "Revocation") by a Board Resolution
delivered to the Trustee, provided that the Company will not make any Revocation
                          --------
unless:

          (a)  no Default or Event of Default shall have occurred and be
     continuing at the time of and after giving effect to such Revocation; and

          (b)  all Liens and Debt of such Unrestricted Subsidiary outstanding
     immediately following such Revocation would, if Incurred at such time, have
     been permitted to be Incurred at such time for all purposes of this
     Indenture.

     All Designations and Revocations must be evidenced by Board Resolutions
delivered to the Trustee (i) certifying compliance with the foregoing provisions
and (ii) giving the effective date of such Designation or Revocation, such
delivery to the Trustee to occur within 45 days after the end of the fiscal
quarter of the Company in which such Designation or Revocation is made (or, in
the case of a Designation or Revocation made during the last fiscal quarter of
the Company's fiscal year, within 90 days after the end of such fiscal year).
Upon Designation of a Restricted Subsidiary as an Unrestricted Subsidiary in
compliance with this Section 1019, such Restricted Subsidiary shall, by delivery
of a supplemental indenture providing for such release in form satisfactory to
the
<PAGE>

                                                                             135

Trustee, be released from any Restricted Subsidiary Guarantee previously made by
such Subsidiary.

                                ARTICLE ELEVEN

                            [INTENTIONALLY OMITTED]

                                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, with
respect to the Securities, elect to have either Section 1202 or Section 1203 be
applied to all Outstanding Securities upon compliance with the conditions set
forth below in this Article Twelve.

     SECTION 1202.  Defeasance and Discharge.
                    -------------------------
<PAGE>

                                                                             136

     Upon the Company's exercise under Section 1201 of the option applicable to
this Section 1202, the Company shall be deemed to have been discharged from its
obligations with respect to all Outstanding Securities on the date the
conditions set forth in Section 1204 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, which shall thereafter be deemed to be "Outstanding" only for the
purposes of Section 1205 and the other Sections of this Indenture referred to in
clauses (A) and (B) below, 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 Company's obligations with
respect to such Securities under Sections 304, 305, 306, 1002 and 1003, (B)
rights of Holders to receive payment of principal of, premium, if any, and
interest on such Securities (but not the Purchase Price referred to under
Section 1009 or 1016) and any rights of the Holders with respect to such
amounts, (C) the rights, obligations and immunities of the Trustee under the
Indenture 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 with respect
to the Securities. If the Company exercises its option under this Section 1202,
each Guarantor, if any, shall be released from all its obligations under its
Restricted Subsidiary Guarantee.
<PAGE>

                                                                             137

     SECTION 1203.  Covenant Defeasance.
                    --------------------

     Upon the Company's exercise under Section 1201 of the option applicable to
this Section 1203, the Company shall be released from its obligations under any
covenant contained in Sections 801(3), (4) and (5), in Sections 803, 1005, 1006
and 1007 and Sections 1009 through 1019 and from the operation of Sections
501(6), (7), (8), (9) and (10) (but, in the case of Sections 501(9) and (10),
with respect only to Significant Subsidiaries), with respect to the Outstanding
Securities on and after the date the conditions set forth below are satisfied
(hereinafter, "covenant defeasance"), and the Securities shall thereafter be
deemed not to be "Outstanding" for the purposes of any direction, waiver,
consent, declaration or other Act of Holders (and the consequences of any
thereof) in connection with such provisions, but shall continue to be deemed
"Outstanding" for all other purposes hereunder. For this purpose, such covenant
defeasance means that, with respect to the Outstanding Securities, 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 provision, whether directly or
indirectly, by reason of any reference elsewhere herein to any such provision or
by reason of any reference in any such provision to any other provision herein
or in any other document and such omission to comply shall not constitute a
Default or an Event of Default under Section 501(3), (4), (5), (6), (7), (8),
(9) or (10) (but, in the case of Section 501(9) or (10), with respect only to
Significant Subsidiaries) but, except as specified above, the remainder of this
Indenture and such Securities shall be unaffected thereby. If the Company
exercises its option under this Section 1203, each Guarantor, if any, shall be
released from all its obligations under its Restricted Subsidiary Guarantee.

     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:
<PAGE>

                                                                             138

          (1)  The Company shall irrevocably have deposited or caused to be
     deposited with the Trustee (or another trustee satisfying the requirements
     of Section 608 who shall agree to comply with the provisions of this
     Article Twelve applicable to it) as trust funds in trust for the purpose of
     making the following payments, specifically pledged as security for, and
     dedicated solely to, the benefit of the Holders of such Securities, at any
     time prior to the Maturity of the Securities: (A) money in an amount, or
     (B) Government Securities or European Government Obligations which through
     the payment of interest and principal will provide, not later than one day
     before the due date of payment in respect of the Securities, money in an
     amount, or (C) a combination thereof, sufficient, in the opinion of a
     nationally recognized firm of independent public accountants expressed in a
     written certification thereof delivered to the Trustee, to pay and
     discharge the principal of (and premium, if any, on) and interest on, the
     Outstanding Securities on the Stated Maturity of such principal (and
     premium, if any) or installment of interest; provided that the Trustee (or
                                                  --------
     such other trustee) shall have been irrevocably instructed in writing to
     apply such money or the proceeds of such Government Securities to said
     payments with respect to the Securities.

          (2)  No Default or Event of Default with respect to the Securities
     shall have occurred and be continuing on the date of such deposit or,
     insofar as paragraphs (9) and (10) of Section 501 are concerned with
     respect to the Company, at any time during the period ending on the 123rd
     day after the date of such deposit (it being understood that this condition
     shall not be deemed satisfied until the expiration of such period).

          (3)  Such defeasance or covenant defeasance shall not result in a
     breach or violation of, or constitute a default under, this Indenture or
     any other agreement or instrument to which the Company is a party or by
     which it is bound.

          (4)  In the case of an election under Section 1202, the Company shall
     have delivered to the Trustee an Opinion of Counsel stating that (x) the
<PAGE>

                                                                             139

     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 defeasance and
     will be subject to federal income tax on the same amounts, in the same
     manner and at the same times as would have been the case if such defeasance
     had not occurred.

          (5)  In the case of an election under Section 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 covenant
     defeasance and will be subject to federal income tax on the same amounts,
     in the same manner and at the same times as would have been the case if
     such covenant defeasance had not occurred.

          (6)  The Company shall have delivered to the Trustee an 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.

          (7)  The Company shall have delivered to the Trustee an Opinion of
     Counsel acceptable to the Trustee to the effect that such defeasance will
     not result in the trust relating thereto or the Trustee being subject to
     regulation under the Investment Company Act of 1940.

          (8)  Money denominated in currency other than euros and Government
     Securities deposited pursuant to this Section 1204 shall be subject in
     their entirety (including principal, interest and premium, if any) to a
     customary currency agreement that is of a duration not less than the
     defeasance period that fixes the exchange rate of such money or Government
     Securities
<PAGE>

                                                                             140

     into euros, and that constitutes a Permitted Interest Rate or Currency
     Protection Agreement for the benefit of the Trustee. The amount of such
     money and Government Securities expressed in euros will be as provided in
     such currency agreement. The counterparty to such currency agreement shall
     be a commercial bank organized in the United States having capital and
     surplus in excess of $500 million or a commercial bank organized under the
     laws of any country that is a member of the OECD having total assets in
     excess of $500 million (or its foreign currency equivalent at the time).
     Such counterparty may obtain from the Company an Opinion of Counsel to the
     effect that such currency agreement has been duly authorized and entered
     into by the Company.

     SECTION 1205. Deposited Money and Government Securities to Be Held in
                   -------------------------------------------------------
Trust; Other Miscellaneous Provisions.
-------------------------------------

     Subject to the provisions of the last paragraph of Section 1003, all money
and Government Securities (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 Outstanding
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, premium, if any,
and interest, but such money need not be segregated from other funds except to
the extent required by law or to the extent the Company acts as its own Paying
Agent.

     The Company shall pay and indemnify the Trustee and (if applicable) its
officers, directors, employees and agents against any tax, fee or other charge
imposed on or assessed against the Government Securities 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.
<PAGE>

                                                                             141

     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 Government Securities held by it as provided in Section
1204 which, in the opinion of a nationally recognized firm of independent public
accountants 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, as
applicable, in accordance with this Article Twelve.

     SECTION 1206.  Reinstatement.
                    --------------

     If the Trustee or any Paying Agent is unable to apply any money in
accordance with Section 401 or 1205 by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, then the Company's and any Guarantor's obligations under this
Indenture and the Securities shall be revived and reinstated as though no
deposit had occurred pursuant to Section 401, 1202 or 1203, as the case may be,
until such time as the Trustee or Paying Agent is permitted to apply all such
money in accordance therewith; provided, however, that if the Company or any
                               --------  -------
Guarantor makes any payment of principal of, premium, if any, or interest on any
Security following the reinstatement of its obligations, the Company or such
Guarantor shall be subrogated to the rights of the Holders of such Securities to
receive such payment from the money held by the Trustee or Paying Agent.
<PAGE>

                                                                             142

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

                                          LEVEL 3 COMMUNICATIONS, INC.

                                               By: /s/ Thomas C. Stortz
                                                  ------------------------
                                                  Name: Thomas C. Stortz
                                                  Title: Group Vice President,
                                                         General Counsel and
                                                         Secretary

Attest: /s/ Neil J. Eckstein
       ----------------------------
       Name: Neil J. Eckstein
       Title: Assistant Secretary

                                          THE BANK OF NEW YORK, as Trustee

                                               By: /s/ Van K. Brown
                                                  ------------------------
                                                  Name: Van K. Brown
                                                  Title: Assistant Vice
                                                         President

Attest: /s/ Remo J. Reale
       -------------------------
       Name: Remo J. Reale
       Title: Vice President
<PAGE>

                              EXHIBIT A

                           Form of Face of Security
                           ------------------------

     [If a Global Security, then insert:]  THIS SECURITY IS A GLOBAL SECURITY
WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN
THE NAME OF A DEPOSITORY OR A NOMINEE OF A DEPOSITORY OR A SUCCESSOR DEPOSITORY.
THIS SECURITY IS NOT EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A
PERSON OTHER THAN THE DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS SECURITY
(OTHER THAN A TRANSFER OF THIS SECURITY AS A WHOLE BY THE DEPOSITORY TO A
NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR
ANOTHER NOMINEE OF THE DEPOSITORY) MAY BE REGISTERED EXCEPT IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

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

                              [Private Placement Legend]

     THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT").  THE HOLDER HEREOF, BY PURCHASING THIS SECURITY,
AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE RESOLD,
PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE SECOND ANNIVERSARY OF THE
ISSUANCE HEREOF (OR A 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 SECURITY IS ELIGIBLE FOR
<PAGE>

                                      A-2

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 THE RESALE, PLEDGE OR
OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (AS INDICATED BY THE BOX
CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS
SECURITY), (3) IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER
THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE
CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY), PROVIDED THAT, IF SUCH
TRANSFER IS BEING EFFECTED BY CERTAIN TRANSFERORS SPECIFIED IN THE INDENTURE (AS
DEFINED BELOW) PRIOR TO THE DATE THAT IS 40 DAYS FOLLOWING THE ISSUE DATE, A
CERTIFICATE THE FORM OF WHICH MAY BE OBTAINED FROM THE COMPANY OR THE TRUSTEE IS
DELIVERED BY THE TRANSFEREE TO THE COMPANY AND THE TRUSTEE, (4) TO AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE
TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY) THAT
IS ACQUIRING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION, AND
A CERTIFICATE THE FORM OF WHICH MAY BE OBTAINED FROM THE COMPANY OR THE TRUSTEE
IS DELIVERED BY THE TRANSFEREE TO THE COMPANY AND THE TRUSTEE (PROVIDED THAT
CERTAIN TRANSFERORS SPECIFIED IN THE INDENTURE MAY NOT TRANSFER THIS SECURITY
PURSUANT TO THIS CLAUSE (4) PRIOR TO THE DATE THAT IS 40 DAYS FOLLOWING THE
ISSUE DATE), (5) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT, OR (6)
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. AN INSTITUTIONAL ACCREDITED INVESTOR HOLDING THIS SECURITY AGREES
IT WILL FURNISH TO THE COMPANY AND THE TRUSTEE SUCH CERTIFICATES AND OTHER
INFORMATION AS THEY MAY REASONABLY REQUIRE TO CONFIRM THAT ANY TRANSFER BY IT OF
THIS SECURITY COMPLIES WITH THE FOREGOING RESTRICTIONS. THE HOLDER HEREOF, BY
PURCHASING THIS SECURITY, REPRESENTS AND AGREES FOR THE BENEFIT OF THE COMPANY
THAT IT IS (1) A QUALIFIED INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A
OR (2) AN INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE
501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT AND THAT IT IS
<PAGE>

                                      A-3

HOLDING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION OR (3) 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 Physical Security, then insert:]  IN CONNECTION WITH ANY TRANSFER, THE
HOLDER WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND
OTHER INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT
THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.
<PAGE>

                                      A-4

                          LEVEL 3 COMMUNICATIONS, INC.

                       10 3/4% Senior Euro Note Due 2008
                                                            CUSIP No.
No.                                                 [up to] $

     Level 3 Communications, Inc., a Delaware corporation (herein called the
"Company", which term includes any successor Person under the Indenture
hereinafter referred to), for value received, hereby promises to pay to
_____________, or registered assigns, the principal sum of [if a Global
Security, then insert:  up to] _________ Dollars [if a Global Security, then
insert:  (the outstanding principal amount of which shall be reflected in the
attached Schedule of Increases or Decreases in Global Security and the records
of the Trustee which, taken together with the outstanding principal amounts of
all other Outstanding Securities, shall not exceed (EURO)500,000,000 in the
aggregate at any time)] on March 15, 2008, at the office or agency of the
Company referred to below, and to pay interest thereon, in cash in arrears
semiannually on March 15 and September 15 in each year, commencing on September
15, 2000, accruing from February 29, 2000 or from the most recent Interest
Payment Date to which interest has been paid or duly provided for, at the rate
of 10 3/4% per annum, until the principal hereof is paid or duly provided for.
The Company shall pay interest on overdue principal at the rate borne by the
Securities, and it shall pay interest on overdue installments of interest at the
same rate to the extent lawful.

[Delete this paragraph if an Exchange Security (other than a Private Exchange
Security).]  The Holder of this Security is entitled to the benefits of a Euro
Registration Agreement, dated as of February 24, 2000, between the Company and
the Purchasers named therein (the "Registration Agreement").  Capitalized terms
used in this paragraph but not defined herein have the meanings assigned to them
in the Registration Agreement.  In the event that (i) neither the Exchange Offer
Registration Statement nor the Shelf Registration Statement has been filed with
the Commission on or prior to the 90th day following the date of the original
issuance of the Securities, (ii) neither the Exchange Offer Registration
Statement nor the Shelf Registration Statement has been declared effective on or
prior to the 150th day
<PAGE>

                                      A-5

following the date of the original issuance of the Securities, (iii) neither the
Registered Exchange Offer has been consummated nor the Shelf Registration
Statement has been declared effective on or prior to the 180th day following the
date of the original issuance of the Securities, or (iv) after the Shelf
Registration Statement has been declared effective, such Registration Statement
thereafter ceases to be effective or usable in connection with resales of the
Securities at any time that the Company is obligated to maintain the
effectiveness thereof pursuant to the Registration Agreement (each such event
referred to in clauses (i) through (iv) above being referred to herein as a
"Registration Default"), interest (the "Special Interest") shall accrue (in
addition to stated interest on the Securities) from and including the date on
which the first such Registration Default shall occur to but excluding the date
on which all Registration Defaults have been cured, at a rate per annum equal to
0.50% of the principal amount of the Securities; provided, however, that such
                                                 --------  -------
rate per annum shall increase by 0.25% per annum from and including the 91st day
after the first such Registration Default (and each successive 91st day
thereafter) unless and until all Registration Defaults have been cured;
provided further, however, that in no event shall the Special Interest accrue at
----------------  -------
a rate in excess of 1.00% per annum.  Accrued Special Interest, if any, shall be
paid in cash in arrears semiannually on March 15 and September 15 in each year;
and the amount of accrued Special Interest shall be determined on the basis of
the number of days actually elapsed.  Any accrued and unpaid interest (including
Special Interest) on this Security upon the issuance of an Exchange Security in
exchange for this Security shall cease to be payable to the Holder hereof but
such accrued and unpaid interest (including Special 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 the March 1 or September 1 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date.  Any such
<PAGE>

                                      A-6

interest not so punctually paid or duly provided for shall forthwith cease to be
payable to the Holder on such Regular Record Date, and such defaulted interest,
and (to the extent lawful) interest on such defaulted interest at the rate borne
by the Securities, may 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 may be paid at any time in
any other lawful manner, all as more fully provided in said Indenture.   Payment
of the principal of (and premium, if any) and interest on this Security will be
made at the office or agency of the Company maintained for that purpose in The
City of New York, or at such other office or agency of the Company as may be
maintained for such purpose, in euros or such coin or currency of the European
Union as at the time of payment is legal tender for payment of public and
private debts; provided, however, that payment of interest may be made at the
               --------  -------
option of the Company by check mailed to the address of the Person entitled
thereto as such address shall appear on the Security Register.

     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.
<PAGE>

                                      A-7

     Unless the certificate of authentication hereon has been duly 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 under its corporate seal.

Dated:_______________            LEVEL 3 COMMUNICATIONS, INC.

                                 By:________________________________
                                    Authorized Signatory

Attest:______________
<PAGE>

                                      A-8

                          Form of Reverse of Security
                          ---------------------------

     This Security is one of a duly authorized issue of securities of the
Company designated as its 10 3/4% Senior Euro Notes Due 2008 (herein called the
"Securities"), limited (except as otherwise provided in the Indenture referred
to below) in aggregate principal amount to (EURO)500,000,000, which may be
issued under an indenture (herein called the "Indenture") dated as of February
29, 2000 between the Company and The Bank of New York, as trustee (herein called
the "Trustee", which term includes any successor trustee under the Indenture),
to which Indenture and all indentures supplemental thereto reference is hereby
made for a statement of the respective rights, limitations of rights, duties,
obligations and immunities thereunder of the Company, the Trustee and the
Holders of the Securities, and of the terms upon which the Securities are, and
are to be, authenticated and delivered.

     The Securities not redeemable prior to maturity.

     Upon the occurrence of a Change of Control Triggering Event, the Holder of
this Security may require the Company, subject to certain limitations provided
in the Indenture, to repurchase this Security at a purchase price in cash in an
amount equal to 101% of the principal amount thereof, plus accrued and unpaid
interest (if any) to the purchase date (subject to the right of Holders of
record on the relevant record date to receive interest due on the relevant
interest payment date).

     To guarantee the due and punctual payment of the principal, premium (if
any) and interest on the Securities and all other amounts payable by the Company
under the Indenture and the Securities when and as the same shall be due and
payable, whether at maturity, by acceleration or otherwise, according to the
terms of the Securities and the Indenture, the Guarantors, if any, will
unconditionally guarantee such obligations on a senior unsecured basis pursuant
to the terms of the Indenture.

     If an Event of Default shall occur and be continuing, the principal of all
the Securities may be declared due and
<PAGE>

                                      A-9

payable in the manner and with the effect provided in the Indenture.

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

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders under the Indenture at any time by the
Company and the Trustee with the consent of the Holders of a majority in
aggregate principal amount 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.  Without the consent of any
Holder of Securities, the Company and the Trustee may amend or modify the
Indenture for certain purposes specified therein, including the release of
Guarantors, if any, from Restricted Subsidiary Guarantees as provided by the
terms of the Indenture.  Any such consent or waiver by or on behalf of 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.

     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 registerable on the Security Register of
the Company,
<PAGE>

                                      A-10

upon surrender of this Security for registration of transfer at the office or
agency of the Company maintained for such purpose in The City of New York, duly
endorsed by, or accompanied by a written instrument of transfer in form
satisfactory to the Company and the 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 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 (EURO)1,000 and any integral multiple thereof. As provided in
the Indenture and subject to certain limitations therein set forth, the
Securities are exchangeable for a like 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 registration of transfer or
exchange of the Securities, but the Company may require payment of a sum
sufficient to cover any transfer tax or other similar governmental charge
payable in connection therewith.

     Prior to the time of 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 neither
the Company, the Trustee nor any agent shall be affected by notice to the
contrary.

     THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW
OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF
CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER
JURISDICTION WOULD BE REQUIRED THEREBY.

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

<PAGE>

                                      A-11

                Form of Trustee's Certificate of Authentication
               ------------------------------------------------

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

                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     Dated:  __________________

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

                              THE BANK OF NEW YORK, as Trustee

                              By:
                                 _________________________________
                                 Authorized Signatory
<PAGE>

                                      A-12

                              Assignment Form
                              ---------------

     If you, the holder, want to assign this Security, fill in the form below
and have your signature guaranteed:

I or we assign and transfer this Security to _________________________________

________________________________________________________________________________
(Insert assignee's social security or tax ID number)
                                             _________________________________

(Print or type assignee's name, address and zip code)
                                             _________________________________

                                             _________________________________

                                             _________________________________

and irrevocably appoint____________________________

of ______________________________

   ______________________________

agent to transfer this Security on the books of the Company.  The agent may
substitute another to act for such agent.
<PAGE>

                                      A-13

     In connection with any transfer of any of the Securities evidenced by this
certificate occurring prior to the date that is two years (or such shorter
period as may be prescribed by Rule 144(k) under the Securities Act or any
successor provision thereunder) after the later of the date of original issuance
of such Securities (or any Predecessor Security) or three months after the last
date, if any, on which such Securities (or any Predecessor Security) were owned
by the Company or any Affiliate of the Company, the undersigned confirms that
such Securities are being transferred in accordance with its terms:

CHECK ONE BOX BELOW

     (1) [_]   to the Company; or

     (2) [_]   pursuant to an effective registration statement under the
               Securities Act of 1933; or

     (3) [_]   inside the United States to a "qualified institutional buyer" (as
               defined in Rule 144A under the Securities Act of 1933) that
               purchases for its own account or for the account of a qualified
               institutional buyer to whom notice is given that such transfer is
               being made in reliance on Rule 144A, in each case pursuant to and
               in compliance with Rule 144A under the Securities Act of 1933; or

     (4) [_]   outside the United States in an offshore transaction within the
               meaning of Regulation S under the Securities Act in compliance
               with Rule 904 under the Securities Act of 1933, provided that, if
               such transfer is being effected by certain transferors specified
               in the Indenture prior to the date that is 40 days following the
               Issue Date, a certificate which may be obtained from the Company
               or the Trustee is delivered by the transferee to the Company and
               the Trustee; or

     (5) [_]   to an institutional "accredited investor" (as defined in Rule
               501(a)(1), (2), (3) or (7)
<PAGE>

                                      A-14

               under the Securities Act of 1933) that has furnished to the
               Trustee a signed letter containing certain representations and
               agreements (the form of which letter can be obtained from the
               Trustee or the Company), provided that certain transferors
               specified in the Indenture may not transfer this Security
               pursuant to this clause (5) prior to the date that is 40 days
               following the Issue Date; or

     (6) [_]   pursuant to another available exemption from registration
               provided by Rule 144 under the Securities Act of 1933.

Unless one of the boxes is checked, the Trustee will refuse to register any of
the Securities evidenced by this certificate in the name of any person other
than the registered holder thereof; provided, however, that if box (4), (5) or
                                    --------  -------
(6) is checked, the Trustee may require, prior to registering any such transfer
of the Securities, such legal opinions, certifications and other information as
the Company has reasonably requested to confirm that such transfer is being made
pursuant to an exemption from, or in a transaction not subject to, the
registration requirements of the Securities Act of 1933.

Dated:  _______________  Your signature:  __________________________________
                                                     (Sign
                         exactly as your name appears on the other side of this
                         Security)

                         By:
                         ____________________________________________________
                         NOTICE:  To be executed by an executive officer

Signature Guarantee:     ____________________________________

     TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED:

     The undersigned represents and warrants that it is purchasing this Security
for its own account or an account
<PAGE>

                                      A-15

with respect to which it exercises sole investment discretion and that it and
any such account is a "qualified institutional buyer" within the meaning of Rule
144A under the Securities Act of 1933 and is aware that the sale to it is being
made in reliance on Rule 144A and acknowledges that it has received such
information regarding the Company as the undersigned has requested pursuant to
Rule 144A (including the information specified in Rule 144A(d)(4)) or has
determined not to request such information and that it is aware that the
transferor is relying upon the undersigned's foregoing representations in order
to claim the exemption from registration provided by Rule 144A.

Dated:_____________________   ____________________________________
                              NOTICE:  To be executed by an
                                      executive officer
<PAGE>

                                      A-16

                      Option of Holder to Elect Purchase
                      ----------------------------------

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

     If you wish to have a portion of this Security purchased by the Company
pursuant to Section 1009 or 1016 of the Indenture, state the amount:
$___________________.

Dated: ________________  Your Signature:  ________________________________
                         (Sign exactly as your name appears on the other side of
                         this Security)
<PAGE>

                                      A-17

                     [TO BE ATTACHED TO GLOBAL SECURITIES]

             SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

          The initial principal amount of this Global Security is EURO[       ].
The following increases or decreases in this Global Security have been made:

Date of   Amount of        Amount of         Principal amount Signature of
Transfer  decrease in      increase in       of this Global   authorized
          Principal Amount Principal Amount  Security         signatory of
          of this Global   of this Global    following such   Trustee or
          Security         Security          decrease or      Security Registrar
                                             increase

<PAGE>

                                   EXHIBIT B

                        FORM OF SUPPLEMENTAL INDENTURE

                    SUPPLEMENTAL INDENTURE (this "Supplemental Indenture") dated
               as of                            , among [GUARANTOR] (the "New
               Guarantor"), a subsidiary of Level 3 Communications, Inc. (or its
               successor), a Delaware corporation (the "Company"), LEVEL 3
               COMMUNICATIONS, INC., on behalf of itself and the Guarantors (the
               "Existing Guarantors"), if any, under the Indenture referred to
               below, and THE BANK OF NEW YORK, a New York banking corporation,
               as trustee under the indenture referred to below (the "Trustee").

                             W I T N E S S E T H :

          WHEREAS the Company has heretofore executed and delivered to the
Trustee an Indenture dated as of February 29, 2000 (the "Indenture"; capitalized
terms used but not defined herein having the meanings assigned thereto in the
Indenture), providing for the issuance of an aggregate principal amount of up to
(Euro) 300,000,000 of 11 3/4% Senior Euro Notes Due 2008 (the "Securities");

          WHEREAS the Indenture permits the New Guarantor to execute and deliver
to the Trustee a supplemental indenture pursuant to which the New Guarantor
shall unconditionally guarantee all the Company's obligations under the
Securities pursuant to a Guarantee on the terms and conditions set forth herein;

          WHEREAS the Guarantee contained in this Supplemental Indenture shall
constitute a "Restricted Subsidiary Guarantee", and the New Guarantor shall
constitute a "Guarantor", for all purposes of the Indenture; and

          WHEREAS pursuant to Section 901 of the Indenture, the Trustee and the
Company are authorized to execute and deliver this Supplemental Indenture;
<PAGE>

                                      B-2

     NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the New
Guarantor, the Company, the Existing Guarantors and the Trustee mutually
covenant and agree for the equal and ratable benefit of the holders of the
Securities as follows:

     1.  Guaranties.  The New Guarantor hereby unconditionally guarantees,
         -----------
jointly and severally, to each Holder and to the Trustee and its successors and
assigns (a) the full and punctual payment of principal of (and premium, if any)
and interest on the Securities when due, whether at Stated Maturity, by
acceleration, by redemption or otherwise, and all other monetary obligations of
the Company under the Indenture and the Securities and (b) the full and punctual
performance within applicable grace periods of all other obligations of the
Company under the Indenture and the Securities (all the foregoing being
hereinafter collectively called the "Obligations"). The New Guarantor further
agrees that the Obligations may be extended or renewed, in whole or in part,
without notice or further assent from the New Guarantor and that the New
Guarantor will remain bound under this Supplemental Indenture notwithstanding
any extension or renewal of any Obligation.

     The New Guarantor waives presentation to, demand of, payment from and
protest to the Company of any of the Obligations and also waives notice of
protest for nonpayment. The New Guarantor waives notice of any default under the
Securities or the Obligations. The obligations of the New Guarantor hereunder
shall not be affected by (a) the failure of any Holder or the Trustee to assert
any claim or demand or to enforce any right or remedy against the Company or any
other Person under the Indenture, the Securities or any other agreement or
otherwise; (b) any extension or renewal of any thereof; (c) any rescission,
waiver, amendment or modification of any of the terms or provisions of the
Indenture, the Securities or any other agreement; (d) the release of any
security held by any Holder or the Trustee for the Obligations or any of them;
(e) the failure of any Holder or the Trustee to exercise any right or remedy
against any other guarantor of the Obligations; or (f) any change in the
ownership of the New Guarantor.

     The New Guarantor further agrees that its Guarantee herein constitutes a
guarantee of payment, performance and compliance when due (and not a guarantee
of collection) and
<PAGE>

                                      B-3

waives any right to require that any resort be had by any Holder or the Trustee
to any security held for payment of the Obligations.

          Except as expressly set forth in Sections 803, 1017, 1019, 1202 and
1203 of the Indenture, the obligations of the New Guarantor hereunder shall not
be subject to any reduction, limitation, impairment or termination for any
reason, including any claim of waiver, release, surrender, alteration or
compromise, and shall not be subject to any defense of setoff, counterclaim,
recoupment or termination whatsoever or by reason of the invalidity, illegality
or unenforceability of the Obligations or otherwise. Without limiting the
generality of the foregoing, the obligations of the New Guarantor herein shall
not be discharged or impaired or otherwise affected by the failure of any Holder
or the Trustee to assert any claim or demand or to enforce any remedy under the
Indenture, the Securities or any other agreement, by any waiver or modification
of any thereof, by any default, failure or delay, willful or otherwise, in the
performance of the obligations, or by any other act or thing or omission or
delay to do any other act or thing which may or might in any manner or to any
extent vary the risk of the New Guarantor or would otherwise operate as a
discharge of the New Guarantor as a matter of law or equity.

          The New Guarantor further agrees that its Guarantee herein shall
continue to be effective or be reinstated, as the case may be, if at any time
payment, or any part thereof, of principal of or (premium, if any) interest on
any Obligation is rescinded or must otherwise be restored by any Holder or the
Trustee upon the bankruptcy or reorganization of the Company or otherwise.

          In furtherance of the foregoing and not in limitation of any other
right which any Holder or the Trustee has at law or in equity against the New
Guarantor by virtue hereof, upon the failure of the Company to pay the principal
of (or premium, if any) or interest on any Obligation when and as the same shall
become due, whether at Stated Maturity, by acceleration, by redemption or
otherwise, or to perform or comply with any other Obligation, the New Guarantor
hereby promises to and will, upon receipt of written demand by the Trustee,
forthwith pay, or cause to be paid, in cash, to the Holders or the Trustee an
amount equal to the sum of (i) the unpaid amount of such Obligations,
<PAGE>

                                      B-4

(ii) accrued and unpaid interest on such Obligations (but only to the extent not
prohibited by law) and (iii) all other monetary Obligations of the Company to
the Holders and the Trustee.

          The New Guarantor agrees that it shall not be entitled to any right of
subrogation in respect of any Obligations guaranteed hereby until payment in
full in cash of all Obligations. The New Guarantor further agrees that, as
between it, on the one hand, and the Holders and the Trustee, on the other hand,
(x) the maturity of the Obligations guaranteed hereby may be accelerated as
provided in Article Five of the Indenture for the purposes of the New
Guarantor's Guarantee herein, notwithstanding any stay, injunction or other
prohibition preventing such acceleration in respect of the Obligations
guaranteed hereby, and (y) in the event of any declaration of acceleration of
such obligations as provided in Article Five of the Indenture, such Obligations
(whether or not due and payable) shall forthwith become due and payable by the
New Guarantor for the purposes of this Section.

          The New Guarantor also agrees to pay any and all costs and expenses
(including reasonable attorneys' fees) incurred by the Trustee or any Holder in
enforcing any rights under this Section 1.

          2.  Contribution.  Each of the Company and the New Guarantor (a
              -------------
"Contributing Party") agrees that, in the event a payment shall be made by any
other Guarantor under any Restricted Subsidiary Guarantee (the "Claiming
Guarantor"), the Contributing Party shall indemnify the Claiming Guarantor in an
amount equal to the amount of such payment multiplied by a fraction, the
numerator of which shall be the net worth of the Contributing Party (which, in
the case of the Company, shall be measured on the Issue Date, and in the case of
the New Guarantor, on the date hereof) and the denominator of which shall be the
aggregate net worth of the Company on the Issue Date and the Guarantors on
respective dates of the Supplemental Indentures executed and delivered by such
Guarantors.

          3.  Successors and Assigns.  This Supplemental Indenture shall be
              -----------------------
binding upon the New Guarantor and its successors and assigns and shall enure to
the benefit of the successors and assigns of the Trustee and the Holders and, in
the event of any transfer or assignment of rights by any Holder or the Trustee,
the rights and privileges conferred upon that party
<PAGE>

                                      B-5

in the Indenture and in the Securities shall automatically extend to and be
vested in such transferee or assignee, all subject to the terms and conditions
of this Indenture.

          4.  No Waiver.  Neither a failure nor a delay on the part of either
              ----------
the Trustee or the Holders in exercising any right, power or privilege under
this Supplemental Indenture, the Indenture or the Securities shall operate as a
waiver thereof, nor shall a single or partial exercise thereof preclude any
other or further exercise of any right, power or privilege. The rights, remedies
and benefits of the Trustee and the Holders herein and therein expressly
specified are cumulative and not exclusive of any other rights, remedies or
benefits which either may have under this Supplemental Indenture, the Indenture
or the Securities at law, in equity, by statute or otherwise.

          5.  Modification.  No modification, amendment or waiver of any
              -------------
provision of this Supplemental Indenture, nor the consent to any departure by
the New Guarantor therefrom, shall in any event be effective unless the same
shall be in writing and signed by the Trustee, and then such waiver or consent
shall be effective only in the specific instance and for the purpose for which
given. No notice to or demand on the New Guarantor in any case shall entitle the
New Guarantor to any other or further notice or demand in the same, similar or
other circumstances.

          6.  Opinion of Counsel.  Concurrently with the execution and delivery
              -------------------
of this Supplemental Indenture, the Company shall deliver to the Trustee an
Opinion of Counsel to the effect that this Supplemental Indenture has been duly
authorized, executed and delivered by each of the New Guarantor and the Company
and that, subject to the application of bankruptcy, insolvency, moratorium,
fraudulent conveyance or transfer and other similar laws relating to creditors'
rights generally and to the principles of equity, whether considered in a
proceeding at law or in equity, the Guarantee of the New Guarantor is a legal,
valid and binding obligation of the New Guarantor, enforceable against the New
Guarantor in accordance with its terms.

          7.  Ratification of Indenture; Supplemental Indentures Part of
              ----------------------------------------------------------
Indenture.  Except as expressly amended hereby, the Indenture is in all respects
----------
ratified and confirmed and all the terms, conditions and provisions thereof
shall remain in full force and effect. This Supplemental Indenture shall form a
part of the Indenture for all purposes, and every holder of Securities
<PAGE>

                                      B-6

heretofore or hereafter authenticated and delivered shall be bound hereby.

          8.  Governing Law.  THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY,
              --------------
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT
THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

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

          10.  Effect of Headings.  The Section headings herein are for
               -------------------
convenience only and shall not effect the construction thereof.
<PAGE>

                                      B-7

          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed as of the date first above written.

                                  [NEW GUARANTOR],

                                    by

                                      __________________________________
                                      Name:
                                      Title:

                                  LEVEL 3 COMMUNICATIONS, INC., on behalf of
                                  itself and the Existing Guarantors, if any,

                                    by

                                      __________________________________
                                      Name:
                                      Title:

                                  THE BANK OF NEW YORK, as Trustee,

                                    by

                                      __________________________________
                                      Name:
                                      Title:<PAGE>

                                                                  EXECUTION COPY

                                                                  EXHIBIT 4.2

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

                         LEVEL 3 COMMUNICATIONS, INC.,

                                    Issuer

                                      to

                             THE BANK OF NEW YORK,

                                  as Trustee

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

                           Euro Securities Indenture

                         Dated as of February 29, 2000

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

                               (Euro)300,000,000

                      11 1/4% Senior Euro Notes Due 2010

================================================================================
<PAGE>

                               TABLE OF CONTENTS

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

      ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.  Definitions..................................................    2
              Accreted Value...............................................    3
              Acquired Debt................................................    3
              Act..........................................................    3
              Affiliate....................................................    3
              Affiliate Transaction........................................    4
              Agent Member.................................................    4
              Asset Disposition............................................    4
              Attributable Value...........................................    5
              Board of Directors...........................................    5
              Board Resolution.............................................    5
              Business Day.................................................    6
              Capital Lease Obligation.....................................    6
              Capital Stock................................................    6
              Cash Equivalents.............................................    6
              Change of Control............................................    7
              Change of Control Triggering Event...........................    7
              Clearstream..................................................    7

              Code.........................................................    7
              Commission...................................................    7
              Common Depositary............................................    7
              Common Stock.................................................    7
              Company......................................................    7
              Company Order................................................    7
              Consolidated Capital Ratio...................................    9
              Consolidated Cash Flow Available for
                Fixed Charges..............................................    9
              Consolidated Income Tax Expense..............................   10
              Consolidated Interest Expense................................   10
              Consolidated Net Income......................................   11
</TABLE>
<PAGE>

<TABLE>
              <S>                                                             <C>
              Consolidated Net Worth.......................................   12
              Consolidated Tangible Assets.................................   12
              Corporate Trust Office.......................................   12
              Credit Agreement.............................................   12
              Credit Facilities............................................   12
              Debt.........................................................   12
              Default......................................................   14
              Defaulted Interest...........................................   14
              Depository...................................................   14
              Designation..................................................   14
              Designation Amount...........................................   14
              Disqualified Stock...........................................   14
              Disqualified Stock Dividends.................................   14
              Dollar Notes.................................................   15
              Eligible Receivables.........................................   15
              euro.........................................................   15
              Euroclear....................................................   15
              Euro Notes...................................................   15
              European Government Obligation...............................   15
              European Union...............................................   15
              Event of Default.............................................   16
              Exchange Act.................................................   16
              Exchange Securities..........................................   16
              Excess Proceeds..............................................   16
              Existing Notes...............................................   16
              Expiration Date..............................................   16
              Fair Market Value............................................   16
              Federal Bankruptcy Code......................................   16
              Global Security..............................................   16
              Government Securities........................................   16
              Guarantee....................................................   17
              Guarantor....................................................   17
              Holder.......................................................   17
              Incur........................................................   17
              Indenture....................................................   18
              Initial Foreign Purchaser....................................   18

              Initial Purchasers...........................................   18
              Initial Securities...........................................   18
              Institutional Accredited Investor............................   18
              Institutional Accredited Investor Global Security............   18
              Interest Payment Date........................................   18
              Interest Rate or Currency Protection Agreement...............   19
              Invested Capital.............................................   19
              Investment...................................................   19
              Issue Date...................................................   20
              Issue Date Purchase Money Debt...............................   20
              Issue Date Rating............................................   20
</TABLE>

                                     (ii)
<PAGE>

<TABLE>
              <S>                                                             <C>
              Joint Venture................................................   20
              Lien.........................................................   20
              Maturity.....................................................   21
              Measurement Date.............................................   21
              Moody's......................................................   21
              Net Available Proceeds.......................................   21
              New Convertible Notes........................................   22
              9 1/8% Senior Notes..........................................   22
              Non-Global Purchasers........................................   22
              Offer........................................................   22
              Offer to Purchase............................................   23
              Officers' Certificate........................................   25
              Opinion of Counsel...........................................   26
              OECD.........................................................   26
              Outstanding..................................................   26
              Paying Agent.................................................   27
              Permitted Holders............................................   27
              Permitted Interest Rate or Currency
                Protection Agreement.......................................   27
              Permitted Investments........................................   28
              Permitted Liens..............................................   28
              Permitted Telecommunications Capital
                Asset Disposition..........................................   29
              Person.......................................................   29
              Physical Security............................................   29
              Predecessor Security.........................................   30
              Preferred Stock..............................................   30
              Preferred Stock Dividends....................................   30
              Private Exchange Offer.......................................   30
              Private Exchange Securities..................................   30
              Private Placement Legend.....................................   30
              Property.....................................................   30
              Proportionate Interest.......................................   31
              Purchase Amount..............................................   31
              Purchase Date................................................   31
              Purchase Money Debt..........................................   31
              Purchase Price...............................................   31
              Qualified Institutional Buyer or QIB.........................   31
              Qualified Receivable Facility................................   31
              Rating Agencies..............................................   32
              Rating Date..................................................   32
              Rating Decline...............................................   32
              Receivables..................................................   32
              refinancing..................................................   32
              Registered Exchange Offer....................................   32
              Registration Agreement.......................................   32
              Registration Default.........................................   33
              Regular Record Date..........................................   33
              Regulation S.................................................   33
              Regulation S Global Security.................................   33
</TABLE>

                                     (iii)
<PAGE>

<TABLE>
<S>                                                                           <C>
              Required Filing Dates........................................   33
              Responsible Officer..........................................   33
              Restricted Payment...........................................   33
              Restricted Subsidiary........................................   33
              Restricted Subsidiary Guarantee..............................   33
              Revocation...................................................   34
              Rule 144A....................................................   34
              Rule 144A Global Security....................................   34
              S&P..........................................................   34
              Sale and Leaseback Transaction...............................   34
              Securities...................................................   34
              Securities Act...............................................   34
              Security Register............................................   35
              Shelf Registration Statement.................................   35
              Significant Subsidiary.......................................   35
              6% Convertible Notes.........................................   35
              Special Assets...............................................   35
              Special Interest.............................................   35
              Special Record Date..........................................   35
              Stated Maturity..............................................   35
              Subordinated Debt............................................   36
              Subsidiary...................................................   36
              Telecommunications/IS Assets.................................   36
              Telecommunications/IS Business...............................   38
              10 1/2% Senior Discount Notes................................   38
              Trust Indenture Act or TIA...................................   38
              Trustee......................................................   38

              Unrestricted Subsidiary......................................   38
              Vice President...............................................   39
              Voting Stock.................................................   39
              Wholly Owned Subsidiary......................................   39
SECTION 102.  Compliance Certificates and Opinions.........................   39
SECTION 103.  Form of Documents Delivered to Trustee.......................   40
SECTION 104.  Acts of Holders..............................................   41
SECTION 105.  Notices, etc., to Trustee and Company........................   43
SECTION 106.  Notice to Holders; Waiver....................................   44
SECTION 107.  Effect of Headings and Table of
                Contents...................................................   44
SECTION 108.  Successors and Assigns.......................................   44
SECTION 109.  Separability Clause..........................................   45
SECTION 110.  Benefits of Indenture........................................   45
SECTION 111.  Governing Law................................................   45
SECTION 112.  Conflict with Trust Indenture Act............................   45
SECTION 113.  Legal Holidays...............................................   46
SECTION 114.  No Personal Liability of Directors,
                Officers, Employees and Stockholders.......................   46
SECTION 115.  Independence of Covenants....................................   46
SECTION 116.  Exhibits.....................................................   46
SECTION 117.  Counterparts.................................................   47
</TABLE>

                                     (iv)
<PAGE>

<TABLE>
<S>                                                                           <C>
SECTION 118.  Duplicate Originals..........................................   47

                           ARTICLE TWO SECURITY FORMS

SECTION 201. Forms Generally...............................................   47

                          ARTICLE THREE THE SECURITIES

SECTION 301.  Title and Terms..............................................   48
SECTION 302.  Denominations................................................   49
SECTION 303.  Execution, Authentication, Delivery and Dating...............   49
SECTION 304.  Temporary Securities.........................................   52
SECTION 305.  Registration, Registration of Transfer
                and Exchange...............................................   53
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.............   54
SECTION 307.  Payment of Interest; Interest Rights Preserved...............   55
SECTION 308.  Persons Deemed Owners........................................   57
SECTION 309.  Cancellation.................................................   58
SECTION 310.  Computation of Interest......................................   58
SECTION 311.  CUSIP Number.................................................   58
SECTION 312.  Book-Entry Provisions for Global
                Securities.................................................   59
SECTION 313.  Special Transfer Provisions..................................   62

                    ARTICLE FOUR SATISFACTION AND DISCHARGE

SECTION 401.   Satisfaction and Discharge of Indenture.....................   69
SECTION 402.   Application of Trust Money..................................   70

                             ARTICLE FIVE REMEDIES

SECTION 501.  Events of Default............................................   71
SECTION 502.  Acceleration of Maturity; Rescission and Annulment...........   73
SECTION 503.  Collection of Indebtedness and Suits
                for Enforcement by Trustee.................................   74
SECTION 504.  Trustee May File Proofs of Claim.............................   75
SECTION 505.  Trustee May Enforce Claims Without Possession of
                Securities.................................................   76
SECTION 506.  Application of Money Collected...............................   77
SECTION 507.  Limitation on Suits..........................................   77
SECTION 508.  Unconditional Right of Holders to Receive
                Principal, Premium and Interest............................   78
</TABLE>

                                      (V)
<PAGE>

<TABLE>
<S>                                                                           <C>
SECTION 509.  Restoration of Rights and Remedies...........................   78
SECTION 510.  Rights and Remedies Cumulative...............................   79
SECTION 511.  Delay or Omission Not Waiver.................................   79
SECTION 512.  Control by Holders...........................................   79
SECTION 513.  Waiver of Past Defaults......................................   80
SECTION 514.  Waiver of Stay or Extension Laws.............................   80

                                 ARTICLE SIX THE TRUSTEE

SECTION 601.  Certain Duties and Responsibilities..........................   81
SECTION 602.  Notice of Default............................................   82
SECTION 603.  Certain Rights of Trustee....................................   83
SECTION 604.  Trustee Not Responsible for Recitals or Issuance
                of Securities..............................................   85
SECTION 605.  May Hold Securities..........................................   85
SECTION 606.  Money Held in Trust..........................................   85
SECTION 607.  Compensation and Reimbursement...............................   85
SECTION 608.  Corporate Trustee Required; Eligibility;
                Conflicting Interests......................................   87
SECTION 609.  Resignation and Removal; Appointment of Successor............   87
SECTION 610.  Acceptance of Appointment by
                Successor..................................................   89
SECTION 611.  Merger, Conversion, Consolidation or Succession to
                Business...................................................   89

        ARTICLE SEVEN HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.  Disclosure of Names and Addresses of
                Holders....................................................   91
SECTION 702.  Reports by Trustee...........................................   91
SECTION 703.  Reports by Company...........................................   91

      ARTICLE EIGHT CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.  Company May Consolidate, etc., Only on Certain
                Terms......................................................   92
SECTION 802.  Successor Company Substituted................................   93
SECTION 803.  Guarantor May Consolidate, etc., Only on Certain
                Terms......................................................   94
SECTION 804.  Successor Guarantor Substituted..............................   96

                     ARTICLE NINE SUPPLEMENTAL INDENTURES

SECTION 901.  Supplemental Indentures Without Consent
</TABLE>

                                     (vi)

<PAGE>

<TABLE>
<S>                                                                           <C>
                of Holders.................................................   97

SECTION 902.    Supplemental Indentures With Consent of Holders............   98
SECTION 903.    Execution of Supplemental Indentures.......................   99
SECTION 904.    Effect of Supplemental Indentures..........................  100
SECTION 905.    Conformity with Trust Indenture Act........................  100
SECTION 906.    Reference in Securities to Supplemental Indentures.........  100
SECTION 907.    Notice of Supplemental Indentures..........................  100

                              ARTICLE TEN COVENANTS

SECTION 1001.  Payment of Principal, Premium, if any, and
                 Interest..................................................  101
SECTION 1002.  Maintenance of Office or Agency.............................  101
SECTION 1003.  Money for Security Payments to Be Held in Trust.............  102
SECTION 1004.  Corporate Existence.........................................  104
SECTION 1005.  Maintenance of Properties...................................  104
SECTION 1006.  Insurance...................................................  105
SECTION 1007.  Reports.....................................................  105
SECTION 1008.  Statement by Officers as to Default.........................  105
SECTION 1009.  Change of Control Triggering Event..........................  106
SECTION 1010.  Limitation on Consolidated Debt.............................  110
SECTION 1011.  Limitation on Debt of Restricted............................  115
                 Subsidiaries
SECTION 1012.  Limitation on Restricted Payments...........................  117
SECTION 1013.  Limitation on Dividend and Other
                 Payment Restrictions Affecting
                 Restricted Subsidiaries...................................  121
SECTION 1014.  Limitation on Liens.........................................  123
SECTION 1015.  Limitation on Sale and Leaseback
                 Transactions..............................................  125
SECTION 1016.  Limitation on Asset Dispositions............................  125
SECTION 1017.  Limitation on Issuance and Sales of
                 Capital Stock of Restricted
                 Subsidiaries .............................................  128
SECTION 1018.  Transactions with Affiliates................................  130
SECTION 1019.  Limitation on Designations of Unrestricted
                 Subsidiaries..............................................  132
</TABLE>

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES
                            [INTENTIONALLY OMITTED]

                                     (vii)
<PAGE>

<TABLE>
<S>                                                                          <C>
                ARTICLE TWELVE DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1201.  Company's Option to Effect Defeasance or Covenant
                 Defeasance................................................  135
SECTION 1202.  Defeasance and Discharge....................................  135
SECTION 1203.  Covenant Defeasance.........................................  137
SECTION 1204.  Conditions to Defeasance or Covenant Defeasance.............  137
SECTION 1205.  Deposited Money and Government Securities to Be
                 Held in Trust; Other Miscellaneous Provisions.............  140
SECTION 1206.  Reinstatement...............................................  140
</TABLE>

EXHIBIT A - Form of Security
EXHIBIT B - Form of Supplemental Indenture

                                    (viii)

<PAGE>

     EURO SECURITIES INDENTURE, dated as of February 29, 2000 between Level
3 Communications, Inc., a corporation duly organized and existing under the laws
of the State of Delaware (herein called the "Company"), having its principal
office at 1025 Eldorado Boulevard, Broomfield, Colorado 80021, and The Bank of
New York, a New York banking corporation, as Trustee (herein called the
"Trustee").

                            RECITALS OF THE COMPANY

     The Company has duly authorized the creation of an issue of 11 1/4%
Senior Euro Notes Due 2010 (the "Initial Securities") and, if and when issued
pursuant to a Registered Exchange Offer or Private Exchange Offer pursuant to
the Registration Agreement for the Initial Securities, 11 1/4% Senior Euro Notes
Due 2010 (the "Exchange Securities" and, together with the Initial Securities,
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.

     All things necessary have been done 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 each of the Company and the Trustee, in
accordance with their and its terms.

     NOW, THEREFORE, THIS INDENTURE WITNESSETH:
<PAGE>

                                                                               2

     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, including the recitals set forth
above, except as otherwise expressly provided or unless the context otherwise
requires:

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

          (b)  all other terms used herein which are defined in the Trust
     Indenture Act, either directly or by reference therein, have the
     meanings assigned to them therein;

          (c)  all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with generally accepted accounting
     principles, and, except as otherwise herein expressly provided, the term
     "generally accepted accounting principles" with respect to any computation
     required or permitted hereunder shall mean United States generally accepted
     accounting principles as in effect on the date of this Indenture;

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

          (e)  unless otherwise indicated, references to Articles,
     Sections, paragraphs or other subdivisions are references to such Articles,
     Sections, paragraphs or other subdivisions of this Indenture; and
<PAGE>

                                                                               3

          (f)  "or" is not exclusive and "including" means including without
     limitation.

     "Accreted Value" of any Debt issued at a price less than the principal
amount at stated maturity, means, as of any date of determination, an amount
equal to the sum of (a) the issue price of such Debt as determined in accordance
with Section 1273 of the Code or any successor provisions plus (b) the aggregate
of the portions of the original issue discount (the excess of the amounts
considered as part of the "stated redemption price at maturity" of such Debt
within the meaning of Section 1273(a)(2) of the Code or any successor
provisions, whether denominated as principal or interest, over the issue price
of such Debt) that shall theretofore have accrued pursuant to Section 1272 of
the Code (without regard to Section 1272(a)(7) of the Code) from the date of
issue of such Debt to the date of determination, minus all amounts theretofore
paid in respect of such Debt, which amounts are considered as part of the
"stated redemption price at maturity" of such Debt within the meaning of Section
1273(a)(2) of the Code or any successor provisions (whether such amounts paid
were denominated principal or interest).

     "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 Subsidiary of such specified Person and (ii) Debt
secured by a Lien encumbering any Property 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.

     "Affiliate" of any Person means any other Person directly or indirectly
controlling or controlled by or under direct or indirect common control with
such Person. For the purposes of this definition, "control" when used with
respect to any Person means the power to direct the management and policies of
such Person, directly or indirectly, whether through the ownership of voting
securities, by contract or otherwise; and the terms
<PAGE>

                                                                               4

"controlling" and "controlled" have meanings correlative to the foregoing. For
purposes of Sections 1016 and 1018 and the definition of "Telecommunications/IS
Assets" only, "Affiliate" shall also mean any beneficial owner of shares
representing 10% or more of the total voting power of the Voting Stock (on a
fully diluted basis) of the Company or of rights or warrants to purchase such
Voting Stock (whether or not currently exercisable) and any Person who would be
an Affiliate of any such beneficial owner pursuant to the first sentence hereof.

     "Affiliate Transaction" has the meaning specified in Section 1018.

     "Agent Member" has the meaning specified in Section 312.

     "Asset Disposition" means any transfer, conveyance, sale, lease,
issuance or other disposition by the Company or any Restricted Subsidiary in one
or more related transactions (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 to the Company or a Restricted Subsidiary or by the Company to a
Restricted Subsidiary) of (i) shares of Capital Stock or other ownership
interests of a Restricted Subsidiary (other than as permitted by clause (v),
(vi), (vii) or (ix) of Section 1017), (ii) substantially all of the assets of
the Company or any Restricted Subsidiary representing a division or line of
business or (iii) other Property of the Company or any Restricted Subsidiary
outside of the ordinary course of business (excluding any transfer, conveyance,
sale, lease or other disposition of equipment that is obsolete or no longer used
by or useful to the Company, provided that the Company has delivered to the
                             --------
Trustee an Officers' Certificate stating that such criteria are satisfied);
provided in each case that the aggregate consideration for such transfer,
--------
conveyance, sale, lease or other disposition is equal to $5,000,000 or more in
any 12-month period. The following shall not be Asset Dispositions: (i)
Permitted Telecommunications Capital Asset Dispositions that comply with clause
(i) of the first paragraph of Section 1016, (ii) when used with respect to the
Company, any Asset
<PAGE>

                                                                               5

Disposition permitted pursuant to Article Eight which constitutes a disposition
of all or substantially all of the assets of the Company and the Restricted
Subsidiaries taken as a whole, (iii) Receivables sales constituting Debt under
Qualified Receivable Facilities permitted to be Incurred pursuant to Section
1010 and (iv) any disposition that constitutes a Permitted Investment or a
Restricted Payment permitted by Section 1012.

     "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 remaining
term thereof (including any period for which such lease has been extended) as
determined in accordance with generally accepted accounting principles,
discounted from the last date of such remaining 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 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 .

     "Board of Directors" means the board of directors of the Company.

     "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.
<PAGE>

                                                                               6

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

     "Capital Lease Obligation" of any Person means the obligation to pay
rent or other payment amount under a lease of (or other Debt arrangements
conveying the right to use) 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 and any rights (other than debt securities
convertible or exchangeable into an equity interest), warrants or options to
acquire an equity interest in such Person.

     "Cash Equivalents" means (i) Government Securities maturing, or subject
to tender at the option of the holder thereof, within two years after the date
of acquisition thereof, (ii) time deposits and certificates of deposit of any
commercial bank organized in the United States having capital and surplus in
excess of $500,000,000 or a commercial bank organized under the law of any
other country that is a member of the OECD having total assets in excess of
$500,000,000 (or its foreign currency equivalent at the time) with a maturity
date not more than one year from the date of acquisition, (iii) repurchase
obligations with a term of not more than 30 days for underlying securities of
the types described in clause (i) above entered into with (x) any bank meeting
the qualifications specified in
<PAGE>

                                                                               7

clause (ii) above or (y) any primary government securities dealer reporting to
the Market Reports Division of the Federal Reserve Bank of New York, (iv) 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 maturing, or
subject to tender at the option of the holder thereof, within 90 days after the
date of acquisition thereof, provided that, at the time of acquisition, the
                             --------
long-term debt of such state, political subdivision or public instrumentality
has a rating of A (or higher) from S&P or A-2 (or higher) from Moody's (or, if
at any time neither S&P nor Moody's shall be rating such obligations, then an
equivalent rating from such other nationally recognized rating service
acceptable to the Trustee), (v) commercial paper issued by the parent
corporation of any commercial bank organized in the United States having capital
and surplus in excess of $500,000,000 or a commercial bank organized under the
laws of any other country that is a member of the OECD having total assets in
excess of $500,000,000 (or its foreign currency equivalent at the time), and
commercial paper issued by others having one of the two highest ratings
obtainable from either S&P or Moody's (or, if at any time neither S&P nor
Moody's shall be rating such obligations, then from such other nationally
recognized rating service acceptable to the Trustee) and in each case maturing
within one year after the date of acquisition, (vi) overnight bank deposits and
bankers' acceptances at any commercial bank organized in the United States
having capital and surplus in excess of $500,000,000 or a commercial bank
organized under the laws of any other country that is a member of the OECD
having total assets in excess of $500,000,000 (or its foreign currency
equivalent at the time), (vii) deposits available for withdrawal on demand with
a commercial bank organized in the United States having capital and surplus in
excess of $500,000,000 or a commercial bank organized under the laws of any
other country that is a member of the OECD having total assets in excess of
$500,000,000 (or its foreign currency equivalent at the time) and (viii) invest-
ments in money market funds substantially all of whose assets comprise
securities of the types described in clauses (i) through (vii).

     "Change of Control" has the meaning specified in Section 1009.
<PAGE>

                                                                               8

     "Change of Control Triggering Event" has the meaning specified in
Section 1009.

     "Clearstream" means Clearstream International, a clearing and
settlement organization.

     "Code" means the Internal Revenue Code of 1986, as amended.

     "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 Indenture such Commission is not existing and performing
the duties now assigned to it under the Trust Indenture Act, then the body
performing such duties at such time.

     "Common Depositary" means The Bank of New York Depositary (Nominees) Ltd.
and its nominees and successors, as common depositary for Euroclear and
Clearstream.

     "Common Stock" of any Person means Capital Stock of such Person that
does not rank 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.

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

     "Company Order" or "Company Request" means a written request or order
signed in the name of the Company by the Chairman of the Board of Directors, a
Vice Chairman of the Board of Directors, the President or a Vice President, and
by the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, an
Assistant Treasurer, the Controller, the Secretary or an Assistant Secretary of
the Company and delivered to the Trustee.
<PAGE>

                                                                               9

     "Consolidated Capital Ratio" means as of the date of determination the
ratio of (i) the aggregate amount of Debt of the Company and its Restricted
Subsidiaries on a consolidated basis as at the date of determination to (ii) the
sum of (a) $2,024,000,000, (b) the aggregate net proceeds to the Company from
the issuance or sale of any Capital Stock (including Preferred Stock) of the
Company other than Disqualified Stock subsequent to the Measurement Date, (c)
the aggregate net proceeds from the issuance or sale of Debt of the Company or
any Restricted Subsidiary subsequent to the Measurement Date convertible or
exchangeable into Capital Stock of the Company other than Disqualified Stock, in
each case upon conversion or exchange thereof into Capital Stock of the Company
subsequent to the Measurement Date and (d) the after-tax gain on the sale,
subsequent to the Measurement Date, of Special Assets to the extent such Special
Assets have been sold for cash, Cash Equivalents, Telecommunications/IS Assets
or the assumption of Debt of the Company or any Restricted Subsidiary (other
than Debt that is subordinated to the Securities or any applicable Restricted
Subsidiary Guarantee) and release of the Company and all Restricted Subsidiaries
from all liability on the Debt assumed; provided, however, that, for purposes of
                                        --------  -------
calculation of the Consolidated Capital Ratio, the net proceeds from the
issuance or sale of Capital Stock or Debt described in clause (b) or (c) above
shall not be included to the extent (x) such proceeds have been utilized to make
a Permitted Investment under clause (i) of the definition thereof or a
Restricted Payment or (y) such Capital Stock or Debt shall have been issued or
sold to the Company, a Subsidiary of the Company or an employee stock ownership
plan or trust established by the Company or any such Subsidiary for the benefit
of their employees.

     "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, to the extent reducing Consolidated Net
Income for such period, (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) consolidated depreciation and amortization expense and any other non-cash
items (other than any such non-cash item to the extent that it represents an
accrual of
<PAGE>

                                                                              10

or reserve for cash expenditures in any future period); provided, however, that
                                                        --------  -------
there shall be excluded therefrom the Consolidated Cash Flow Available for Fixed
Charges (if positive) of any Restricted Subsidiary (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 to the
extent of such restrictions.

     "Consolidated Income Tax Expense" for any period means the aggregate
amounts of the provisions 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" for any period means the interest
expense included in a consolidated income statement (excluding interest income)
of the Company and its Restricted Subsidiaries for such period 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 and issuance costs, including commitment fees;
(ii) any payments or fees with respect to letters of credit, bankers'
acceptances or similar facilities; (iii) net costs with respect to interest rate
swap or similar agreements or foreign currency hedge, exchange or similar
agreements (including fees); (iv) Preferred Stock Dividends (other than
dividends paid in shares of Preferred Stock that is not Disqualified Stock)
declared and paid or payable; (v) accrued Disqualified Stock Dividends, whether
or not declared or paid; (vi) interest on Debt guaranteed by the Company and its
Restricted Subsidiaries; (vii) the portion of any Capital Lease Obligation or
Sale and Leaseback Transaction paid during such period that is allocable to
interest expense; (viii) interest Incurred in connection with investments in
discontinued operations; and (ix) the cash contributions to any employee stock
ownership plan or similar trust to the extent such contributions are used by
such plan or trust to pay interest or fees to any Person (other than the Company
or a Restricted Subsidiary) in connection with Debt Incurred by such plan or
trust.
<PAGE>

                                                                              11

     "Consolidated Net Income" for any period means the 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) for purposes of Section 1012
--------
only, the net income (or loss) of any Person acquired by the Company or a
Restricted Subsidiary 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 that is not a Restricted Subsidiary except to the extent of the amount of
dividends or other distributions actually paid to the Company or a Restricted
Subsidiary by such Person during such period (except, for purposes of Section
1012 only, to the extent such dividends or distributions have been subtracted
from the calculation of the amount of Investments to support the actual making
of Investments), (c) gains or losses realized upon the sale or other disposition
of any Property of the Company or its Restricted Subsidiaries that is not sold
or disposed of in the ordinary course of business (it being understood that
Permitted Telecommunications Capital Asset Dispositions shall be considered to
be in the ordinary course of business), (d) gains or losses realized upon the
sale or other disposition of any Special Assets, (e) all extraordinary gains
and extraordinary losses, determined in accor dance with generally accepted
accounting principles, (f) the cumulative effect of changes in accounting
principles, (g) non-cash gains or losses resulting from fluctuations in currency
exchange rates, (h) any non-cash expense related to the issuance to employees or
directors of the Company or any Restricted Subsidiary of (1) options to purchase
Capital Stock of the Company or such Restricted Subsidiary or (2) other
compensatory rights; provided, in either case, that such options or rights, by
                     --------
their terms can be redeemed at the option of the holder of such option or right
only for Capital Stock, and (i) with respect to a Restricted Subsidiary that is
not a Wholly Owned Subsidiary any aggregate net income (or loss) in excess of
the Company's or any Restricted Subsidiary's pro rata share of the net income
(or loss) of such Restricted Subsidiary that is not a Wholly Owned Subsidiary;
provided further that there shall further be excluded therefrom the net income
----------------
(but not net loss) of any Restricted Subsidiary that is subject to a restriction
which prevents the payment of dividends or the making of
<PAGE>

                                                                              12

distributions to the Company or another Restricted Subsidiary to the extent of
such restriction.

     "Consolidated Net Worth" of any Person means the 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.

     "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 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.

     "Corporate Trust Office" means the principal corporate trust office of
the Trustee, at which at any particular time its corporate trust business shall
be administered, which office at the date of execution of this Indenture is
located at 101 Barclay Street, Floor 21W, New York, New York 10286.

     "Credit Agreement" means the Credit Agreement dated as of September 30,
1999, among the Company, certain subsidiaries of the Company, the lenders
parties thereto and The Chase Manhattan Bank, as Administrative Agent and
Collateral Agent.

     "Credit Facilities" means one or more credit agreements, loan
agreements or similar facilities, secured or unsecured, providing for revolving
credit loans, term loans and/or letters of credit, including the Credit
Agreement and any Qualified Receivable Facility, entered into from time to time
by the Company and its Restricted Subsidiaries, and including any related notes,
Guarantees, collateral documents, instruments and agreements executed in
connection therewith, as the same may be amended, supplemented, modified,
restated or replaced from time to time.

     "Debt" means (without duplication), with respect to any Person, whether
recourse is to all or a portion of the
<PAGE>

                                                                              13

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 obligations
incurred in connection with the acquisition of Property, (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), (v) every Capital Lease Obligation of such
Person and all Attributable Value in respect of Sale and Leaseback Transactions
entered into by such Person, (vi) all obligations to redeem or repurchase
Disqualified Stock issued by such Person, (vii) the liquidation preference of
any Preferred Stock (other than Disqualified Stock, which is covered by the
preceding clause (vi)) issued by any Restricted Subsidiary of 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, except as otherwise set forth herein, the Accreted Value of
such Debt at such time or (b) in the case of any Receivables sale constituting
Debt, the amount of the unrecovered purchase price (that is, the amount paid for
Receivables that has not been actually recovered from the collection of such
Receivables) paid by the purchaser (other than the Company or a Wholly Owned
Restricted Subsidiary of the Company) thereof. The amount of Debt represented by
an obligation under an Interest Rate or Currency Protection Agreement shall be
equal to (x) zero if such obligation has been Incurred pursuant to clause (x) of
paragraph (b) of Section 1010 or (y) the notional amount of such obligation if
not Incurred pursuant to such clause.
<PAGE>

                                                                              14

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

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

     "Depository" means The Depository Trust Company, its nominees and
successors.

     "Designation" and "Designation Amount" have the respective meanings
specified in Section 1019.

     "Disqualified Stock" of any Person means any Capital Stock of such
Person 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;
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 a change of control occurring prior to the final Stated Maturity
of the Securities shall not constitute Disqualified Stock if the 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 1009 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 1009.

     "Disqualified Stock Dividends" means all dividends with respect to
Disqualified Stock of the Company held by Persons other than a Wholly Owned
Restricted Subsidiary. The amount of any such dividend shall be equal to the
quotient of such dividend divided by the difference between one and the maximum
statutory federal income tax rate (expressed as a decimal number between 1 and
0) applicable to the Company for the period during which such dividends were
paid.
<PAGE>

                                                                              15

     "Dollar Notes" means, collectively, the Company's 11% Senior Notes due
2008 in an aggregate principal amount not to exceed $800,000,000, the Company's
11 1/4% Senior Notes due 2010 in an aggregate amount not to exceed $250,000,000
and the Company's 12 7/8% Senior Discount Notes due 2010 in an aggregate
principal amount at maturity not to exceed $675,000,000.

     "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.

     "euro" means the single currency at the start of the third stage of
economic and monetary union on January 1, 1999, pursuant to the Treaty
establishing the European Economic Community as amended by the Treaty on
European Union, signed at Maastricht on February 7, 1992, and the Treaty signed
at Amsterdam on October 2, 1997.

     "Euroclear" means the Euroclear System, a clearing and settlement
organization.

     "Euro Notes" means the Company's 10 3/4% Senior Euro Notes due 2008 in
an aggregate principal amount not to exceed (U)500,000,000.

     "European Government Obligation" means direct non- callable obligations
of, or non-callable obligations permitted by, any state members of the European
Union, the payment or guarantee of which is secured by the pledge of the full
faith and credit of the respective nation, provided that such nation has a
                                           --------
credit rating at least equal to that of the highest rated member nation of the
member nations of the European Union.

     "European Union" means the state members to the third stage of economic
and monetary union pursuant to the Treaty of Rome establishing the European
Community, as amended by the Treaty on European Union, signed at Maastricht on
February 7, 1992, and the Treaty signed at Amsterdam on October 2, 1997.
<PAGE>

                                                                              16

     "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 (or respective
successors thereto).

     "Exchange Securities" has the meaning stated in the first recital of
this Indenture.

     "Excess Proceeds" has the meaning specified in Section 1016.

     "Existing Notes" means the 9 1/8% Senior Notes, the 10 1/2% Senior
Discount Notes and the 6% Convertible Notes.

     "Expiration Date" has the meaning specified in "Offer to Purchase"
below.

     "Fair Market Value" means, with respect to any Property, the price that
could be negotiated in an arm's-length free market transaction, for cash,
between a willing seller and a willing buyer, neither of whom is under pressure
or compulsion to complete the transaction. Unless otherwise specified herein,
Fair Market Value shall be determined by the Board of Directors acting in good
faith and shall be evidenced by a Board Resolution delivered to the Trustee.

     "Federal Bankruptcy Code" means the Bankruptcy Act of Title 11 of the
United States Code, as amended from time to time.

     "Global Security" means a Rule 144A Global Security, an Institutional
Accredited Investor Global Security or a Regulation S Global Security, as the
case may be.

     "Government Securities" means direct obligations of, or obligations fully
and unconditionally guaranteed or insured by, the United States of America or
any agency or instrumentality thereof for the payment of which obligations or
guarantee the full faith and credit of the United States is pledged and which
are not callable or redeemable at the issuer's option (unless, for purposes of
the definition of
<PAGE>

                                                                              17

"Cash Equivalents" only, the obligations are redeemable or callable at a price
not less than the purchase price paid by the Company or the applicable
Restricted Subsidiary, together with all accrued and unpaid interest (if any) on
such Government Securities).

     "Guarantee" by any Person means any obligation, direct or indirect,
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 any obligation, direct or
indirect, contingent or otherwise, 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, including any such obligations arising by virtue of partnership
arrangements or by agreements to keep-well, (ii) to purchase Property or
services or to take-or-pay for the purpose of assuring the holder of such Debt
of the payment of such Debt, (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 or (iv) entered into for the
purpose of assuring in any other manner the obligee against loss in respect
thereof, in whole or in part (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.

     "Guarantor" means a Restricted Subsidiary of the Company that has
executed a Restricted Subsidiary Guarantee, until a successor Person shall have
become such pursuant to the applicable provisions of this Indenture, and
thereafter "Guarantor" shall mean such successor Person.

     "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 the recording, as required pursuant to
<PAGE>

                                                                              18

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. Debt otherwise incurred by a Person before it becomes a
Subsidiary of the Company shall be deemed to have been Incurred at the time at
which it becomes a Subsidiary.

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

     "Initial Foreign Purchaser" means each non U.S. person (within the
meaning of Regulation S) that purchased Initial Securities from the Initial
Purchasers in offshore transactions meeting the requirements of Regulation S.

     "Initial Purchasers" means Salomon Smith Barney International Limited,
Goldman Sachs International, Morgan Stanley & Co. International Limited, Chase
Securities Inc., J.P. Morgan Securities Ltd., Credit Suisse First Boston
(Europe) Limited, Barclays Capital Inc., Credit Lyonnais SA, Kleinwort Benson
Limited and Societe Generale.

     "Initial Securities" has the meaning stated in the first recital of
this Indenture.

     "Institutional Accredited Investor" means an institution that is an
"accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act.

     "Institutional Accredited Investor Global Security" has the meaning
specified in Section 303.

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

                                                                              19

         "Interest Rate or Currency Protection Agreement" of any Person means
any forward contract, futures contract, swap, option or other financial
agreement or arrangement (including caps, floors, collars and similar
agreements) relating to, or the value of which is dependent upon, interest rates
or currency exchange rates or indices.

         "Invested Capital" means the sum of (a) $500,000,000, (b) the aggregate
net proceeds received by the Company from the issuance or sale of any Capital
Stock, including Preferred Stock, of the Company but excluding Disqualified
Stock, subsequent to the Measurement Date, and (c) the aggregate net proceeds
from the issuance or sale of Debt of the Company or any Restricted Subsidiary
subsequent to the Measurement Date convertible or exchangeable into Capital
Stock of the Company other than Disqualified Stock, in each case upon conversion
or exchange thereof into Capital Stock of the Company subsequent to the
Measurement Date; provided, however, that the net proceeds from the issuance or
                  --------  -------
sale of Capital Stock or Debt described in clause (b) or (c) shall be excluded
from any computation of Invested Capital to the extent (i) utilized to make a
Restricted Payment or (ii) such Capital Stock or Debt shall have been issued or
sold to the Company, a Subsidiary of the Company or an employee stock ownership
plan or trust established by the Company or any such Subsidiary for the benefit
of their employees.

         "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, purchase, redemption, retirement or
acquisition of Capital Stock, bonds, notes, debentures or other securities or
evidence of Debt issued by, or Incurrence of, or payment on, a Guarantee of any
obligation of, any other Person; provided that Investments shall exclude
                                 --------
commercially reasonable extensions of trade credit. The amount, as of any date
of determination, of any Investment shall be the original cost of such
Investment, plus the cost of all additions, as of such date, thereto and minus
the amount, as of such date, of any portion of such Investment repaid to such
Person in cash as a repayment of principal or a return of capital, as the case
may be (except to the extent such repaid amount has been
<PAGE>

                                                                              20

included in Consolidated Net Income to support the actual making of Restricted
Payments), but without any other adjustments for increases or decreases in
value, or write-ups, write-downs or write-offs with respect to such Investment.
In determining the amount of any Investment involving a transfer of any Property
other than cash, such Property shall be valued at its Fair Market Value at the
time of such transfer.

         "Issue Date" means the date on which the Initial Securities are
initially issued.

         "Issue Date Purchase Money Debt" means Purchase Money Debt outstanding
on the Issue Date; provided, that the amount of such Purchase Money Debt when
                   --------
Incurred did not exceed 100% of the cost of the construction, installation,
acquisition, lease, development or improvement of the applicable
Telecommunications/IS Assets.

         "Issue Date Rating" means B3 in the case of Moody's and B in the case
of S&P, which are the respective ratings assigned to the Securities by the
Rating Agencies on the Issue Date.

         "Joint Venture" means a Person in which the Company or a Restricted
Subsidiary holds not more than 50% of the shares of Voting Stock.

         "Lien" means, with respect to any Property, any mortgage or deed of
trust, pledge, hypothecation, assignment, deposit arrangement, security
interest, lien, charge, easement (other than any easement not materially
impairing usefulness), encumbrance, preference, priority or other security
agreement or preferential arrangement of any kind or nature whatsoever on or
with respect to such Property (including any Capital Lease Obligation,
conditional sale or other title retention agreement having substantially the
same economic effect as any of the foregoing and any Sale and Leaseback
Transaction). For purposes of this definition the sale, lease, conveyance or
other transfer by the Company or any of its Subsidiaries of, including the grant
of indefeasible rights of use or equivalent arrangements with respect to, dark
or lit communications fiber capacity or communications conduit shall not
constitute a Lien.
<PAGE>

                                                                              21

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

         "Measurement Date" means April 28, 1998, the date the 91/8% Senior
Notes were originally issued.

         "Moody's" means Moody's Investors Service, Inc. or, if Moody's
Investors Service, Inc. shall cease rating debt securities having a maturity at
original issuance of at least one year and such ratings business shall have been
transferred to a successor Person, such successor Person; provided, however,
                                                          --------  -------
that if Moody's Investors Service, Inc. ceases rating debt securities having a
maturity at original issuance of at least one year and its ratings business with
respect thereto shall not have been transferred to any successor Person, then
"Moody's" shall mean any other national recognized rating agency (other than
S&P) that rates debt securities having a maturity at original issuance of at
least one year and that shall have been designated by the Trustee by a written
notice given to the Company.

         "Net Available Proceeds" from any Asset Disposition by any Person means
cash or cash equivalents received (including amounts received by way of sale or
discounting of any 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 Property) therefrom by
such Person, net of (i) all legal, title and recording taxes, expenses and
commissions and other fees and expenses (including appraisals, brokerage
commissions and investment banking fees) Incurred and all federal, state,
provincial, foreign and local taxes required to be accrued as a liability as a
consequence of such Asset Disposition, (ii) all payments made by such Person or
its Subsidiaries on any Debt which is secured by such Property in accordance
with the terms of any Lien upon or with respect to such Property 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 required to be
<PAGE>

                                                                              22

made to minority interest holders in Subsidiaries or Joint Ventures of such
Person as a result of such Asset Disposition and (iv) appropriate amounts to be
provided by such Person or any Subsidiary thereof, as the case may be, as a
reserve in accordance with generally accepted accounting principles against any
liabilities associated with such Property and retained by such Person or any
Subsidiary thereof, as the case may be, after such Asset Disposition, including
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 of such Person, 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, for all purposes of this
Indenture and the Securities, treated as a new Asset Disposition at the time of
such reduction with Net Available Proceeds equal to the amount of such
reduction; provided further, however, that, in the event that any consideration
           ----------------  -------
for a transaction (which would otherwise constitute Net Available Proceeds) is
required to be held in escrow pending determination of whether a purchase price
adjustment will be made, at such time as such portion of the consideration is
released to such Person or its Restricted Subsidiary from escrow, such portion
shall be treated for all purposes of this Indenture and the Securities as a new
Asset Disposition at the time of such release from escrow with Net Available
Proceeds equal to the amount of such portion of consideration released from
escrow.

         "New Convertible Notes" means the Company's 6% Convertible Subordinated
Notes due 2010 in an aggregate principal amount not to exceed $862,500,000.

         "9 1/8% Senior Notes" means the Company's 9 1/8% Senior Notes due 2008
in an aggregate principal amount not to exceed $2,000,000,000, originally issued
on April 28, 1998.

         "Non-Global Purchasers" has the meaning specified in Section 303.

         "Offer" has the meaning specified in "Offer to Purchase" below.
<PAGE>

                                                                              23

         "Offer to Purchase" means a written offer (the "Offer") sent by the
Company by first-class mail, postage prepaid, to each Holder of Securities at
its 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 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:
<PAGE>

                                                                              24

                  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% of the Outstanding
         Securities, the manner by which such has been determined pursuant to
         the Section hereof requiring the Offer to Purchase) (the "Purchase
         Amount");

                  d. the purchase price to be paid by the Company for
         (Euro)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
         (U)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 any Securities not tendered or tendered but not
         purchased by the Company will continue to accrue interest;

                  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, if any, 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 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
<PAGE>

                                                                              25

         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 the Paying Agent)
         receives, not later than the close of business on the Expiration Date,
         a 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 (i) 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 (ii) 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 (Euro)1,000
         principal amount or integral multiples thereof shall be purchased); and

                  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.

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

         "Officers' Certificate" means a certificate signed by the Chairman of
the Board of Directors, a Vice Chairman of the Board of Directors, the President
or a Vice President, and by the Chief Financial Officer, the Chief Accounting
Officer, the Treasurer, an Assistant Treasurer, the Controller, the Secretary or
an Assistant Secretary of the
<PAGE>

                                                                              26

Company and delivered to the Trustee, which shall comply with this Indenture.

         "Opinion of Counsel" means an opinion of counsel acceptable to the
Trustee (who may be counsel to the Company, including an employee of the
Company).

         "OECD" shall mean the Organization for Economic Cooperation and
Development.

         "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) on and after any maturity or redemption date, Securities,
         or portions thereof, for whose payment or redemption money in the
         necessary amount has been theretofore deposited with the Trustee or any
         Paying Agent (other than the Company) in trust or set aside and
         segregated in trust by the Company (if the Company shall act as its own
         Paying Agent) for the Holders of such Securities; provided that (a) the
                                                           --------
         Trustee or the Paying Agent, as applicable, is not prohibited from
         paying such money to the Holders and (b) if such Securities are to be
         redeemed, notice of such redemption has been duly given pursuant to
         this Indenture;

                  (iii) Securities, except to the extent provided in Sections
         1202 and 1203, with respect to which the Company has effected
         defeasance or covenant defeasance as provided in Article Twelve; and

                  (iv) 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
<PAGE>

                                                                              27

         whose hands the Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
--------  -------
principal amount of Outstanding Securities have given any request, demand,
authorization, direction, consent, notice or waiver hereunder, and for the
purpose of making the calculations required by TIA Section 313, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in making such calculation or in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Securities which any
Responsible Officer of the Trustee knows to be so owned or as to which the
Trustee has received written notice 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 such
other obligor.

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

         "Permitted Holders" means the members of the Company's Board of
Directors on the Measurement Date and their respective estates, spouses,
ancestors, and lineal descendants, the legal representatives of any of the
foregoing and the trustees of any bona fide trusts of which the foregoing are
the sole beneficiaries or the grantors, or any Person of which the foregoing
"beneficially owns" (as defined in Rule 13d-3 under the Exchange Act) at least
662/3% of the total voting power of the Voting Stock of such Person.

         "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
<PAGE>

                                                                              28

designed to protect such Person against fluctuations in interest rates or
currency exchange rates with respect to Debt Incurred and not for purposes of
speculation and which, in the case of an interest rate agreement, shall have a
notional amount no greater than the principal amount at maturity due with
respect to the Debt being hedged thereby.

         "Permitted Investments" means (a) Cash Equivalents; (b) investments in
prepaid expenses; (c) negotiable instruments held for collection and lease,
utility and workers' compensation, performance and other similar deposits; (d)
loans, advances or extensions of credit to employees and directors made in the
ordinary course of business and consistent with past practice; (e) obligations
under Permitted Interest Rate or Currency Protection Agreements; (f) bonds,
notes, debentures and other securities received as a result of Asset
Dispositions pursuant to and in compliance with Section 1016; (g) Investments in
any Person as a result of which such Person becomes a Restricted Subsidiary; (h)
Investments made prior to the Measurement Date; (i) Investments made after the
Measurement Date in Persons engaged in the Telecommunications/IS Business in an
aggregate amount not to exceed Invested Capital; (j) solely in connection with
the defeasance of euro-denominated Debt permitted under this Indenture, European
Government Obligations; and (k) additional Investments in an aggregate amount
not to exceed $200,000,000.

         "Permitted Liens" means (a) Liens for taxes, assessments, governmental
charges, levies 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'
businesses or the ownership of its Property 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 when taken as a whole, or materially impair
the use thereof in the operation of its business; (c) Liens, pledges and
deposits made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of statutory obligations;
(d) Liens,
<PAGE>

                                                                              29

pledges or deposits made to secure the performance of tenders, bids, leases,
public or statutory obligations, sureties, stays, appeals, indemnities,
performance or other similar bonds and other obligations of like nature incurred
in the ordinary course of business (exclusive of obligations for the payment of
borrowed money, the obtaining of advances or credit or the payment of the
deferred purchase price of Property and which do not in the aggregate materially
impair the use of Property in the operation of the business of the Company and
the Restricted Subsidiaries taken as a whole); (e) 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 materially interfere with the ordinary conduct of the business of the
Company or its Restricted Subsidiaries; and (f) any interest or title of a
lessor in the Property subject to any lease other than a Capital Lease.

         "Permitted Telecommunications Capital Asset Disposi tion" means the
transfer, conveyance, sale, lease or other disposition of optical fiber and/or
conduit and any related equipment used in a Segment (as defined) of the
Company's communications network that (i) constitute capital assets in
accordance with generally accepted accounting principles and (ii) after giving
effect to such disposition, would result in the Company retaining at least
either (A) 24 optical fibers per route mile on such Segment as deployed at the
time of such disposition or (B) 12 optical fibers and one empty conduit per
route mile on such Segment as deployed as such time. "Segment" means (x) with
respect to the Company's intercity network, the through-portion of such network
between two local networks (i.e., Omaha to Denver) and (y) with respect to a
local network of the Company (i.e., Dallas), the entire through-portion of such
network, excluding the spurs which branch off the through-portion.

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

                                                                              30

         "Physical Security" has the meaning specified in Section 303.

         "Predecessor Security" of any particular Security means every previous
Security 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 a mutilated
security or in lieu of a lost, destroyed or stolen Security shall be deemed to
evidence the same debt as the mutilated, lost, destroyed or stolen Security.

         "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.

         "Preferred Stock Dividends" means all dividends with respect to
Preferred Stock of Restricted Subsidiaries held by Persons other than the
Company or a Wholly Owned Restricted Subsidiary. The amount of any such dividend
shall be equal to the quotient of such dividend divided by the difference
between one and the maximum statutory federal income rate (expressed as a
decimal number between 1 and 0) applicable to the issuer of such Preferred Stock
for the period during which such dividends were paid.

         "Private Exchange Offer" means the offer by the Company, pursuant to
Section 2(f) of the Registration Agreement, to issue and deliver to certain
purchasers, in exchange for the Initial Securities held by such purchasers as
part of their initial distribution, a like aggregate principal amount of Private
Exchange Securities.

         "Private Exchange Securities" means the Exchange Securities to be
issued pursuant to this Indenture in connection with a Private Exchange Offer
pursuant to the Registration Agreement.

         "Private Placement Legend" means the third paragraph of the legend set
forth in the Securities in the form set forth in Exhibit A.
<PAGE>

                                                                              31

         "Property" means, with respect to any Person, any interest of such
Person in any kind of property or asset, whether real, personal or mixed, or
tangible or intangible, including Capital Stock in, and other securities of, any
other Person. For purposes of any calculation required pursuant to this
Indenture, the value of any Property shall be its Fair Market Value.

         "Proportionate Interest" in any issuance of Capital Stock of a
Restricted Subsidiary means a ratio (i) the numerator of which is the aggregate
amount of all Capital Stock of such Restricted Subsidiary beneficially owned by
the Company and the Restricted Subsidiaries and (ii) the denominator of which is
the aggregate amount of Capital Stock of such Restricted Subsidiary beneficially
owned by all Persons (excluding, in the case of this clause (ii), any Investment
made in connection with such issuance).

         "Purchase Amount" has the meaning specified in "Offer to Purchase"
above.

         "Purchase Date" has the meaning specified in "Offer to Purchase" above.

         "Purchase Money Debt" means Debt (including Acquired Debt and Capital
Lease Obligations, mortgage financings and purchase money obligations) incurred
for the purpose of financing all or any part of the cost of construction,
installation, acquisition, lease, development or improvement by the Company or
any Restricted Subsidiary of any Telecommunications/IS Assets of the Company or
any Restricted Subsidiary 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.

         "Purchase Price" has the meaning specified in "Offer to Purchase"
above.

         "Qualified Institutional Buyer" or "QIB" has the meaning specified in
Rule 144A.

         "Qualified Receivable Facility" means Debt of the Company or any
Subsidiary Incurred from time to time
<PAGE>

                                                                              32

pursuant to either (x) credit facilities secured by Receivables or (y)
Receivables purchase facilities, 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.

         "Rating Agencies" means Moody's and S&P.

         "Rating Date" means the earlier of the date of public notice of the
occurrence of a Change of Control or of the intention of the Company to effect a
Change of Control.

         "Rating Decline" shall be deemed to have occurred if, no later than 90
days after the Rating Date (which period shall be extended so long as the rating
of the Securities is under publicly announced consideration for possible
downgrade by any of the Rating Agencies), either of the Rating Agencies assigns
or reaffirms a rating to the Securities that is lower than the applicable Issue
Date Rating (or the equivalent thereof). If, prior to the Rating Date, either of
the ratings assigned to the Securities by the Rating Agencies is lower than the
applicable Issue Date Rating, then a Rating Decline will be deemed to have
occurred if such rating is not changed by the 90th day following the Rating
Date. A downgrade within rating categories, as well as between rating
categories, will be considered a Rating Decline.

         "Receivables" means receivables, chattel paper, instruments, documents
or intangibles evidencing or relating to the right to payment of money and
proceeds and products thereof in each case generated in the ordinary course of
business.

         "Redemption Date", when used with respect to any Security to be
redeemed, in whole or in part, 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.

         "refinancing" has the meaning specified in Section 1010(b)(viii).

<PAGE>

                                                                              33

         "Registered Exchange Offer" means the offer by the Company, pursuant to
the Registration Agreement, to certain Holders of Initial Securities, to issue
and deliver to such Holders, in exchange for the Initial Securities, a like
aggregate principal amount of Exchange Securities registered under the
Securities Act.

         "Registration Agreement" means the Euro Registration Agreement dated
February 24, 2000, between the Company and the Initial Purchasers relating to
the Initial Securities.

         "Registration Default" has the meaning specified in Exhibit A.

         "Regular Record Date" for the interest payable on any Interest Payment
Date means the March 1 or September 1 (whether or not a Business Day), as the
case may be, next preceding such Interest Payment Date.

         "Regulation S" means Regulation S under the Securities Act.

         "Regulation S Global Security" has the meaning specified in Section
303.

         "Required Filing Dates" has the meaning specified in Section 1007.

         "Responsible Officer", when used with respect to the Trustee, means any
officer within the Trustee's Corporate Trust Office, including any vice
president, any assistant secretary, any assistant treasurer, 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 Payment" has the meaning specified in Section 1012.

         "Restricted Subsidiary" means (a) a Subsidiary of the Company or of a
Restricted Subsidiary that has not been
<PAGE>

                                                                              34

designated or classified as an Unrestricted Subsidiary pursuant to and in
compliance with Section 1019 and (b) an Unrestricted Subsidiary that is
redesignated as a Restricted Subsidiary pursuant to such Section.

         "Restricted Subsidiary Guarantee" means a supplemental indenture to
this Indenture in substantially the form set forth in Exhibit B hereto,
providing for an unconditional Guarantee of payment in full of the principal of,
premium, if any, and interest on the Securities. Any such Restricted Subsidiary
Guarantee shall not be subordinate to any Debt of the Restricted Subsidiary
providing the Restricted Subsidiary Guarantee.

         "Revocation" has the meaning specified in Section 1019.

         "Rule 144A" means Rule 144A under the Securities Act.

         "Rule 144A Global Security" has the meaning specified in Section 303.

         "S&P" means Standard & Poor's Ratings Service or, if Standard & Poor's
Ratings Service shall cease rating debt securities having a maturity at original
issuance of at least one year and such ratings business shall have been
transferred to a successor Person, such successor Person; provided, however,
                                                          --------  -------
that if Standard & Poor's Rating Service ceases rating debt securities having a
maturity at original issuance of at least one year and its ratings business with
respect thereto shall not have been transferred to any successor Person, then
"S&P" shall mean any other national recognized rating agency (other than
Moody's) that rates debt securities having a maturity at original issuance of at
least one year and that shall have been designated by the Trustee by a written
notice given to the Company.

         "Sale and Leaseback Transaction" of any Person means any direct or
indirect arrangement pursuant to which any Property is sold or transferred by
such Person or a Restricted Subsidiary of such person and is thereafter leased
back from the purchaser or transferee thereof by such Person or one of its
Restricted Subsidiaries. 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 arrange-
<PAGE>

                                                                              35

ment may be terminated by the lessee without payment of a penalty.

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

         "Securities Act" means the Securities Act of 1933, as amended (or any
successor act), and the rules and regulations thereunder (or respective
successors thereto).

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

         "Shelf Registration Statement" means a registration statement issued by
the Company in connection with the offer and sale of Initial Securities pursuant
to the Registration Agreement.

         "Significant Subsidiary" means any Subsidiary that would be a
"Significant Subsidiary" of the Company within the meaning of Rule 1-02 under
Regulation S-X promulgated by the Commission.

         "6% Convertible Notes" means the Company's 6% Convertible Subordinated
Notes due 2009 in an aggregate principal amount not to exceed $823,000,000,
originally issued on September 14, 1999.

         "Special Assets" means (a) the Capital Stock or assets of Cable
Michigan, Inc., RCN Corporation, Commonwealth Telephone Enterprises, Inc., KCP,
Inc. and California Private Transportation Company, L.P. (and any intermediate
holding companies or other entities formed solely for the purpose of owning such
Capital Stock or assets) owned, directly or indirectly, by the Company or any
Restricted Subsidiary on the Measurement Date, and (b) any Property, other than
cash, Cash Equivalents and Telecommunications/IS Assets, received as
consideration for the disposition after the Measurement Date of Special Assets
(as contemplated by the first proviso in Section 1016).

         "Special Interest" has the meaning specified in Exhibit A.
<PAGE>

                                                                              36

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

         "Stated Maturity" when used with respect to a 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 is due and payable, including pursuant to any mandatory redemption
provision (but excluding any provision providing for the repurchase of such
Security at the option of the Holder thereof upon the happening of any
contingency beyond the control of the Company unless such contingency has
occurred).

         "Subordinated Debt" means Debt of the Company (a) that is not secured
by any Lien on or with respect to any Property now owned or acquired after the
Measurement Date and (b) 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 in cash 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 (including by acceleration or for additional
amounts) in respect of, or repurchases, redemptions or other retirements of,
such Debt (collectively, "payments of such Debt") may be permitted for so long
as any default (after giving effect to any applicable grace periods) in the
payment of principal (or premium, if any) or interest on the Securities exists,
including as a result of acceleration; (ii) in the event that any other Default
exists with respect to the Securities, upon notice by Holders of 25% or more in
aggregate 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 such Debt may be made for a period of 179 days from the date of such notice,
provided that not more than one such payment blockage notice may be given in any
--------
consecutive 360- day period, irrespective of the number of defaults with respect
to the Securities during such period; (iii) if payment of such Debt is
accelerated when any Securities are Outstanding, no payments of such Debt may be
made until three Business Days after the Trustee receives notice of
<PAGE>

                                                                              37

such acceleration and, thereafter, such payments may only be made to the extent
the terms of such Debt permit payment at that time; and (iv) 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 retire ment (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, in the case of clause (x)
or (y), any such payment, redemption or other retirement (including pursuant to
an offer to purchase made by the Company) which is conditioned upon (A) a change
of control of the Company pursuant to provisions substantially similar to those
described in Section 1009 (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
described in Section 1009) or (B) a sale or other disposi tion of assets
pursuant to provisions substantially similar to those described in 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 provision described in 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 Subsi
diaries thereof, directly or indirectly, has at least a majority ownership and
power to direct the policies, management and affairs thereof.
<PAGE>

                                                                              38

         "Telecommunications/IS Assets" means (a) any Property (other than cash,
cash equivalents and securities) to be owned by the Company or any Restricted
Subsidiary and used in the Telecommunications/IS Business; (b) for purposes of
Sections 1010 and 1014 only, Capital Stock of any Person; or (c) for all other
purposes of this Indenture, Capital Stock of a Person that becomes a Restricted
Subsidiary as a result of the acquisition of such Capital Stock by the Company
or another Restricted Subsidiary from any Person other than an Affiliate of the
Company; provided, however, that, in the case of clause (b) or (c), such Person
         --------  -------
is primarily engaged in the Telecommunications/IS Business.

         "Telecommunications/IS 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)
constructing, creating, developing or marketing communications networks, related
network transmission equipment, software and other devices for use in a
communications business, (iii) computer outsourcing, data center management,
computer systems integration, reengineering of computer software for any
purpose (including, without limitation, for the purposes of porting computer
software from one operating environment or computer platform to another or to
address issues commonly referred to as "Year 2000 issues") or (iv) evaluating,
participating or pursuing any other activity or opportunity that is primarily
related to those identified in (i), (ii) or (iii) above; provided that the
                                                         --------
determination of what constitutes a Telecommunications/IS Business shall be made
in good faith by the Board of Directors.

         "10 1/2% Senior Discount Notes" means the Company's 10 1/2% Senior
Discount Notes due 2008 in an aggregate principal amount at maturity not to
exceed $833,815,000, originally issued on November 24, 1998.

         "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939 as
in force at the date as of which this Indenture was executed, except as provided
in Section 905.

         "Trustee" means the Person named as the "Trustee" in the first
paragraph of this Indenture until a successor Trustee shall have become such
pursuant to the applicable
<PAGE>

                                                                              39

provisions of this Indenture, and thereafter "Trustee" shall mean such successor
Trustee.

         "Unrestricted Subsidiary" means (a) 91 Holding Corp.; (b) any
Subsidiary of an Unrestricted Subsidiary; and (c) any Subsidiary of the Company
designated as such pursuant to and in compliance with Section 1019 and not
thereafter redesignated as a Restricted Subsidiary as permitted pursuant
thereto.

         "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 for so long as
no senior class of securities has such voting power by reason of any
contingency.

         "Wholly Owned Subsidiary" of any Person means a Subsidiary of such
Person all of the outstanding Voting Stock or other ownership interests (other
than directors' qualifying shares) of which shall at the time be owned by such
Person or by one or more Wholly Owned Subsidiaries of such Person or by such
Person and one or more Wholly Owned Subsidiaries of such Person.
<PAGE>

                                                                              40

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

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

         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture 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.
                       ---------------------------------------
<PAGE>

                                                                              41

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

     Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or Opinion of Counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are 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 (with
proper identification of each matter covered therein) and form one instrument.
<PAGE>

                                                                              42

     SECTION 104.  Acts of Holders.
                   ----------------

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

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

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

     (d)  If the Company shall solicit from the Holders of Securities any
request, demand, authorization, direction, notice, consent, waiver or other Act,
the Company may, at its option, by or pursuant to a Board Resolution, fix in
advance a record date for the determination of Holders entitled to give such
request, demand, authorization,
<PAGE>

                                                                              43

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

     (e)  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. However, any such Holder or future Holder may revoke the request,
demand, authorization, direction, notice, consent, waiver or other Act of the
Holder as to such Holder's Security or portion of the Security if the Trustee
receives the notice of revocation before the date such Act becomes effective.
<PAGE>

                                                                              44

         SECTION 105.  Notices, etc., to Trustee and Company.
                       --------------------------------------

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

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

          (2)  the Company or any Guarantor 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 or such Guarantor addressed to it (in the case of a
     Guarantor, in care of the Company) at the address of the Company's
     principal office specified in the first paragraph of this Indenture, or at
     any other address previously furnished in writing to the Trustee by the
     Company.

         SECTION 106.  Notice to Holders; Waiver.
                       --------------------------
<PAGE>

                                                                              45

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

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

         SECTION 107.  Effect of Headings 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 108.  Successors and Assigns.
                       -----------------------

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

                                                                              46

         SECTION 109.  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 110.  Benefits of Indenture.
                       ----------------------

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

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

     THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF
THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

         SECTION 112.  Conflict with 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 any provision of the Trust Indenture Act or another provision
which is required or deemed to be included in this Indenture by any of the
provisions of the Trust Indenture Act, such provision or requirement of the
Trust Indenture Act 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 excluded,
as the case may be.
<PAGE>

                                                                              47

         SECTION 113.  Legal Holidays.
                       ---------------

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

         SECTION 114.  No Personal Liability of Directors, Officers, Employees
                       -------------------------------------------------------
and Stockholders.
----------------

     No director, officer, employee, incorporator or stockholder of the Company
or any Guarantor, as such, shall have any liability for any obligations of the
Company or any Guarantor under the Securities or this Indenture or for any claim
based on, in respect of, or by reason of, such obligations or their creation,
solely by reason of its status as a director, officer, employee, incorporator or
stockholder of the Company or a Guarantor. By accepting a Security, each Holder
waives and releases all such liability (but only such liability). The waiver and
release are part of the consideration for issuance of the Securities.

         SECTION 115.  Independence of Covenants.
                       --------------------------

     All covenants and agreements in this Indenture shall be given independent
effect so that if a particular action or condition is not permitted by any of
such covenants, the fact that it would be permitted by an exception to, or be
otherwise within the limitations of, another covenant shall not avoid the
occurrence of a Default if such action is taken or condition exists.

         SECTION 116.  Exhibits.
                       ---------

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

                                                                              48

         SECTION 117.  Counterparts.
                       -------------

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

         SECTION 118.  Duplicate Originals.
                       --------------------

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

                                  ARTICLE TWO

                                SECURITY FORMS

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

     The Securities and the Trustee's certificate of authentication with respect
thereto shall be in substantially the form set forth in Exhibit A hereto, with
such appropriate insertions, omissions, substitutions and other variations as
are required or permitted by this Indenture, and may have such letters, numbers
or other marks of identification and such legends or endorsements placed thereon
as may be required to comply with the rules of any securities exchange or system
on which the Securities may be listed or eligible for trading or as may,
consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities. Any portion of the text of
any Security may be set forth on the reverse thereof, with an appropriate
reference thereto on the face of the Security.

     The definitive Securities shall be printed, lithographed or engraved on
steel-engraved borders or may be produced in any other manner permitted by the
rules of any securities exchange or system on which the Securities may be listed
or eligible for trading, all as determined by the officers of the Company
executing such Securities, as evidenced by their execution of such Securities.
<PAGE>

                                                                              49

                                 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 (Euro)300,000,000, 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, 1009, 1016 or 1108.

     The Securities shall be known and designated as the "11 1/4% Senior Euro
Notes Due 2010" of the Company. Their Stated Maturity shall be March 15, 2010,
and they shall bear interest at the rate of 11 1/4% per annum from February 29,
2000, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable on September 15, 2000 and semiannually
thereafter on March 15 and September 15 in each year and at said Stated
Maturity, until the principal thereof is paid or duly provided for.

     Principal of, premium, if any, and interest on the Securities will be
payable, and the Securities may be exchanged or transferred, at the office or
agency of the Company in The City of New York, which, unless otherwise provided
by the Company, will be the offices of the Trustee. At the option of the
Company, interest may be paid by check mailed to addresses of the Persons
entitled thereto as such addresses shall appear on the Security Register.

     The interest rate on the Securities is subject to increase by the addition
of Special Interest and otherwise, all as set forth or referred to in the text
of the Securities appearing in Exhibit A hereto.

     The Securities shall be redeemable as provided in Article Eleven.

     At the election of the Company, the entire Debt on the Securities or
certain of the Company's obligations and covenants and certain Events of Default
thereunder may be defeased as provided in Article Twelve.
<PAGE>

                                                                              50

         SECTION 302.  Denominations.
                       --------------

     The Securities will be issued without coupons and in fully registered form
only, in minimum denominations of (Euro)1,000 principal amount and integral
multiples thereof.

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

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

     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 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.

     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
duly executed by the Trustee by manual signature of an authorized signatory, and
such certificate upon any Security shall be conclusive evidence, and the only
evidence, that such
<PAGE>

                                                                              51

Security has been duly authenticated and delivered hereunder and is entitled to
the benefits of this Indenture.

     The Trustee shall authenticate and deliver (1) initially one or more Global
Securities for original issue in an aggregate principal amount not to exceed
(Euro)300,000,000 and (2) Exchange Securities for issue only in a Registered
Exchange Offer or a Private Exchange Offer pursuant to the Registration
Agreement, for a like principal amount of Initial Securities, upon receipt of a
Company Order, which shall specify the amount of Securities to be authenticated,
whether the Securities are to be Initial Securities or Exchange Securities, the
date on which such Securities are to be authenticated and direct the Trustee to
authenticate such Securities.

     Except as described below, the Securities will be deposited with, or on
behalf of, the Depository, and registered in the name of Cede & Co. as the
Depository's nominee in the form of a global note certificate substantially in
the form of Exhibit A (the "Rule 144A Global Security"), for credit to the
respective accounts of the beneficial owners of the Securities represented
thereby.

     Securities purchased by persons outside the United States pursuant to sales
in accordance with Regulation S under the Securities Act shall be deposited
with, or on behalf of, the Common Depositary, and registered in the name of Cede
& Co. as the Common Depositary's nominee in the form of one or more global note
certificates substantially in the form of Exhibit A (each a "Regulation S Global
Security"), for credit to the respective accounts of the beneficial owners of
the Securities represented thereby, provided that upon such deposit all such
                                    --------
Securities shall be credited to or through accounts maintained at the Depository
by or on behalf of the Euroclear System or Clearstream, societe anonyme.

     Securities transferred to Institutional Accredited Investors will be
deposited with, or on behalf of, the Depository, and registered in the name of
Cede & Co. as the Depository's nominee in the form of one or more global note
certificates substantially in the form of Exhibit A (each a "Institutional
Accredited Investor Global Security"), for
<PAGE>

                                                                              52

credit to the respective accounts of the beneficial owners of the Securities
represented thereby.

     Securities transferred to any persons who are not Qualified Institutional
Buyers or Institutional Accredited Investors (other than persons outside the
United States pursuant to sales or transfers in accordance with Regulation S
under the Securities Act) (collectively, "Non- Global Purchasers") will be
issued in registered definitive form without coupons substantially in the form
of Exhibit A (the "Physical Securities"). Upon the transfer to a Qualified
Institutional Buyer, an Institutional Accredited Investor or to a person outside
the United States pursuant to a sale or transfer in accordance with Regulation S
under the Securities Act of Physical Securities initially issued to a Non-Global
Purchaser, such Physical Security will be exchanged for an interest in a Global
Security representing the principal amount of Securities being transferred.

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

                                                                              53

them, shall provide for the exchange of all Securities at the time Outstanding
for Securities authenticated and delivered in such new name.

         SECTION 304.  Temporary Securities.
                       ---------------------

     Pending the preparation of definitive Securities, the Company may execute,
and upon 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 conclusively evidenced by
their execution of such Securities.

     If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay. After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at the office
or agency of the Company designated for such purpose pursuant to Section 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 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.
<PAGE>

                                                                              54

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

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

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

     At the option of the Holder, Securities may be exchanged for other
Securities of any authorized denomination and of a like aggregate principal
amount, 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 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 Security Registrar) be duly
<PAGE>

                                                                              55

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 for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any transfer tax or other similar governmental charge that may be
imposed in connection with any registration of transfer or exchange of
Securities, other than exchanges pursuant to Section 304, 906, 1009, 1016 or
1108 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 selection of Securities to be redeemed under Section 1104 and
ending at the close of business on the day of such mailing of the relevant
notice of redemption 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.

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

     If (i) any mutilated Security is surrendered to the Trustee or (ii) the
Company and the Trustee receive evidence to their satisfaction of the
destruction, loss or theft of any Security, and there is delivered to the
Company and the Trustee such security or indemnity sufficient to save each of
them harmless, then, in the absence of actual notice to the Company or the
Trustee that such Security has been acquired by a bona fide purchaser, the
Company shall execute and upon Company Order the Trustee shall authenticate and
deliver, in exchange for any such mutilated Security or in lieu of any such
destroyed, lost or stolen Security, a new Security of like tenor and principal
amount, 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 its discretion may,
instead of issuing a new Security, pay such Security.
<PAGE>

                                                                              56

     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 similar
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

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

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

     SECTION 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 such Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest at the office or
agency of the Company maintained for such purpose pursuant to Section 1002;
provided, however, that each installment of interest may at the Company's option
--------  -------
be paid by mailing a check for such interest, payable to or upon the written
order of the Person entitled thereto pursuant to Section 308, to the address of
such Person as it appears in the Security Register.
<PAGE>

                                                                              57

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

                                                                              58

          (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 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 given in the manner provided
         for in Section 106, not less than 10 days prior to such Special Record
         Date. Notice of the proposed payment of such Defaulted Interest and the
         Special Record Date therefor having been so given, such Defaulted
         Interest shall be paid to the Persons in whose names the 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 paragraph (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 or system on which the Securities may be listed or
         eligible for trading, and upon such notice as may be required by such
         exchange or system, if, after notice given by the Company to the
         Trustee of the proposed
<PAGE>

                                                                              59

          payment pursuant to this clause, such manner of payment shall be
          deemed practicable by the Trustee in its sole discretion.

          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 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 the 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 Sections 305 and 307) interest on such Security and for
all other purposes whatsoever, whether or not such Security is 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.
<PAGE>

                                                                              60

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

         All Securities surrendered for payment, redemption, registration of
transfer or exchange shall, if surrendered to any Person other than the Trustee,
be delivered to the Trustee and shall be promptly cancelled by it. The Company
may at any time deliver to the Trustee for cancellation any Securities
previously authenticated and delivered hereunder which the Company may have
acquired in any manner whatsoever, and may deliver to the Trustee (or to any
other Person for delivery to the Trustee) for cancellation any Securities
previously authenticated hereunder which the Company has not issued and sold,
and all Securities so delivered shall be promptly cancelled by the Trustee. If
the Company shall so acquire any of the Securities, however, such acquisition
shall not operate as a redemption or satisfaction of the indebtedness
represented by such Securities unless and until the same are surrendered to the
Trustee for cancellation. 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 by the Trustee in accordance with its customary
procedures unless by Company Order the Company shall direct that cancelled
Securities be returned to it.

         SECTION 310.  Computation of Interest.
                       ------------------------

         Interest on the Securities shall be computed on the basis of a 360-day
year comprised of twelve 30-day months.

         SECTION 311.  CUSIP Number.
                       -------------

         The Company in issuing the Securities may use a "CUSIP" number (if then
generally in use), and if so, the Trustee may use the CUSIP numbers in notices
of redemption or exchange as a convenience to Holders; provided, however, that
                                                       --------  -------
any such notice may state that no representation is made as to the correctness
or accuracy of the CUSIP number printed in the notice or on the Securities, and
that reliance may be placed only on the other identification numbers printed on
the Securities. The Company shall promptly notify the Trustee in writing of any
change in the CUSIP number of the Securities.
<PAGE>

                                                                              61

         SECTION 312.  Book-Entry Provisions for Global Securities.
                       --------------------------------------------

         (a) The Rule 144A Global Securities and Institutional Accredited
Investor Global Securities initially shall (i) be registered in the name of The
Depository Trust Company or its nominee, (ii) be deposited with the Trustee as
custodian for the Depository and (iii) bear legends as set forth in Exhibit A.
The Regulation S Global Securities initially shall (i) be registered in the name
of The Bank of New York Depositary (Nominees) Ltd., as Common Depositary for
Euroclear and Clearstream, or its nominee, (ii) be deposited with the Common
Depositary and (iii) bear legends as set forth in the Exhibit A.

         Members of, or participants in, the Depository, Euroclear or
Clearstream ("Agent Members") shall have no rights under this Indenture with
respect to any Global Security held on their behalf by the Depository or the
Common Depositary, or the Trustee as its custodian, or under the Global
Security, and the Depository and the Common Depositary may be treated by the
Company, the Trustee and any agent of the Company or the Trustee as the absolute
owner of the Global Securities for all purposes whatsoever. Notwithstanding the
foregoing, nothing herein shall (i) prevent the Company, the Trustee or any
agent of the Company or the Trustee from giving effect to any written
certification, proxy or other authorization furnished by the Depository or (ii)
impair, as between a Depository and its Agent Members, the operation of
customary practices governing the exercise of the rights of a Holder of any
Security.

         (b) Transfers of Global Securities shall be limited to transfers in
whole, but not in part, to the Depository or the Common Depositary, as the case
may be, their respective successors or their respective nominees. Interests of
beneficial owners in a Rule 144A Global Security may be transferred or exchanged
for interests in an Institutional Accredited Investor Global Security or a
Regulation S Global Security, interests of beneficial owners in an Institutional
Accredited Investor Global Security may be transferred
<PAGE>

                                                                              62

or exchanged for interests in a Rule 144A Global Security or a Regulation S
Global Security and interests of beneficial owners in a Regulation S Global
Security may be transferred or exchanged for interests in a Rule 144A Global
Security or an Institutional Accredited Investor Global Security, in each case
in accordance with the rules and procedures of the Depository, the Common
Depositary, Euroclear, Clearstream and the provisions of Section 313. Interests
of beneficial owners in the Global Securities may be transferred or exchanged
for Physical Securities in accordance with the rules and procedures of the
Depository and the provisions of Section 313. In addition, Physical Securities
shall be transferred to all beneficial owners in exchange for their beneficial
interests in a Global Security if (i) the Depository or the Common Depositary,
as the case may be, notifies the Company that it is unwilling or unable to
continue as a depository for such Global Security or if at any time the
Depository ceases to be a clearing agency registered under the Exchange Act, and
a successor depository is not appointed by the Company within 90 days, (ii) the
Company executes and delivers to the Trustee a notice that such Global Security
shall be so transferable, registrable and exchangeable, and such transfer shall
be registrable, or (iii) there shall have occurred and be continuing a Default
or Event of Default with respect to the Securities represented by such Global
Security.

         (c) In connection with any transfer or exchange of a portion of the
beneficial interest in any Global Security to beneficial owners pursuant to
paragraph (b), the Security Registrar shall (if one or more Physical Securities
are to be issued) reflect on its books and records the date and a decrease in
the principal amount of the Global Security in an amount equal to the principal
amount of the beneficial interest in the Global Security to be transferred, and
the Company shall execute, and the Trustee shall authenticate and deliver, one
or more Physical Securities of like tenor and principal amount of authorized
denominations.

         (d) In connection with the transfer of Global Securities as an entirety
to beneficial owners pursuant to paragraph (b), the Global Securities shall be
deemed to be surrendered to the Trustee for cancellation, and the Company shall
execute, and the Trustee shall authenticate and deliver, to each beneficial
owner identified by the Depository in exchange for its beneficial interest in
the Global Securities, an equal aggregate principal amount of
<PAGE>

                                                                              63

Physical Securities of like tenor of authorized denominations.

         (e) Any Physical Security delivered in exchange for an interest in a
Global Security pursuant to paragraph (b) or (c) of this Section 312 shall,
except as otherwise provided by paragraph (d) of Section 313, bear the legend
regarding transfer restrictions applicable to the Physical Securities set forth
in Exhibit A.

         (f) The Holder of any Global Security may grant proxies and otherwise
authorize any person, including Agent Members and persons that may hold
interests through Agent Members, to take any action which a Holder is entitled
to take under this Indenture or the Securities.

         (g) In the event that a Global Security is exchanged for Physical
Securities pursuant to this Section 312 prior to the consummation of a
Registered Exchange Offer or the effectiveness of a Shelf Registration Statement
with respect to such Securities, such Securities may be exchanged only in
accordance with such procedures as are substantially consistent with the
provisions of Sections 312 and 313 (including the certification requirements set
forth on the reverse of the Initial Securities intended to ensure that such
transfers comply with Rule 144A, Regulation S or such other applicable exemption
from registration under the Securities Act, as the case may be) and such other
procedures as may from time to time be adopted by the Company.

         (h) Payment of principal of, premium, if any, and interest on
Regulation S Global Securities will be made in euros or in such coin or currency
of the European Union as at the time of payment is legal tender for payment of
public and private debts in immediately available funds to the Common Depositary
for Euroclear and Clearstream or its nominee, as the case may be, as the sole
registered owner and the sole holder of the Regulation S Global Securities for
all purposes under this Indenture. Payment of principal of, premium, if any, and
interest on 144A Global Securities will be made in euros or in such coin or
currency of the European Union as at the time of payment is legal tender for
payment of public and private debts in immediately available funds to the
Trustee, as custodian for DTC. On
<PAGE>

                                                                              64

the record date for any payment with respect to the 144A Global Securities, the
Trustee, as custodian for DTC, shall request that DTC provide a list of DTC
participants holding beneficial interests in the 144A Global Securities. If DTC
provides such list, the Trustee, as custodian for DTC, shall solicit wire
transfer instructions from such participants for use in connection with such
payments of principal of, premium, if any, and interest on, 144A Global
Securities. Pending disbursement by the Trustee, as custodian for DTC, funds
held by the Trustee shall not accrue interest for the benefit of participants
holding beneficial interests in the 144A Global Securities.

         (i) So long as the Securities are held in the form of Global
Securities, deposits of principal of, premium, if any, and interest on the
Securities with the Trustee, as custodian for DTC, or the Common Depositary
shall be deemed to be payment by the Company of such principal, premium, if any,
and interest for all purposes under this Indenture.

         SECTION 313.  Special Transfer Provisions.
                       ----------------------------

         (a) Transfers to Non-QIB Institutional Accredited Investors. The
             --------------------------------------------------------
following provisions shall apply with respect to the registration of any
proposed transfer of a Security to any Institutional Accredited Investor which
is not a QIB (excluding transfers to non-U.S. persons):

                  (1) The Security Registrar shall register the transfer of any
         Security if (x) the requested transfer is not prior to that date which
         is two years (or such shorter period as may be prescribed by Rule
         144(k) under the Securities Act or any successor provision thereunder)
         after the later of the original issue date of such Security (or of any
         Predecessor Security) or three months after the last day on which the
         Company or any Affiliate of the Company was the owner of such Security
         or any Predecessor Security or (y) such transfer is being made by a
         proposed transferor who has checked the box provided for on the form of
         Security stating, or who has otherwise advised the Company and the
         Security Registrar in writing, that the transfer has been made to an
         institutional "accredited investor" (as defined in Rule 501(a)(1), (2),
         (3) or (7) under the Securities Act) and the proposed transferee has
<PAGE>

                                                                              65

         delivered to the Security Registrar a certificate containing certain
         representations and agreements (the form of which certificate can be
         obtained from the Trustee or the Company), provided that no Initial
                                                    --------
         Foreign Purchaser or any foreign purchaser who has purchased Securities
         from an Initial Foreign Purchaser or from any person other than a QIB
         or an Institutional Accredited Investor pursuant to paragraph (b) below
         shall be permitted to transfer any Securities so purchased by it to an
         Institutional Accredited Investor pursuant to this paragraph (a) prior
         to the date that is 40 days following the Issue Date.

                  (2) Subject to paragraph (1) above, if (i) the proposed
         transferee is an Agent Member, and the Securities to be transferred
         consist of Physical Securities which after transfer are to be evidenced
         by an interest in the Institutional Accredited Investor Global
         Security, upon receipt by the Security Registrar of instructions given
         in accordance with the Depository's, the Common Depositary's (or
         Euroclear's and Clearstream's, as the case may be) and the Security
         Registrar's procedures, the Security Registrar shall reflect on the
         Security Register the date and an increase in the principal amount of
         the Institutional Accredited Investor Global Security in an amount
         equal to the principal amount of the Physical Securities to be
         transferred, and the Trustee shall cancel the Physical Securities so
         transferred, and (ii) the proposed transferor is an Agent Member
         holding a beneficial interest in a Rule 144A Global Security or a
         Regulation S Global Security, upon receipt by the Security Registrar of
         instructions given in accordance with the Depository's, the Common
         Depositary's (or Euroclear's and Clearstream's, as the case may be) and
         the Security Registrar's procedures, the Security Registrar shall
         reflect on its books and records the date of such transfer and (A) a
         decrease in the principal amount of such Rule 144A Global Security or
         Regulation S Global Security, as the case may be, in an amount equal to
         the principal amount of the beneficial interest in a Global Security to
         be transferred, and (B) an increase in the principal amount of an
         Institutional Accredited Investor Global Security in an amount equal to
         the principal amount to be transferred.
<PAGE>

                                                                              66

         (b)  Transfers to Non-U.S. Persons. The following provisions shall
              ------------------------------
apply with respect to the registration of any proposed transfer of a Security to
any non-U.S. person:

                  (1) The Security Registrar shall register the transfer of any
         Security if (x) the requested transfer is not prior to that date which
         is two years (or such shorter period as may be prescribed by Rule
         144(k) under the Securities Act or any successor provision thereunder)
         after the later of the original issue date of such Security (or of any
         Predecessor Security) or three months after the last day on which the
         Company or any Affiliate of the Company was the owner of such Security
         or any Predecessor Security or (y) such transfer is being made by a
         proposed transferor who has checked the box provided for on the form of
         Security stating, or who has otherwise advised the Company and the
         Security Registrar in writing, that the transfer has been made outside
         the U.S. in an offshore transaction within the meaning of Regulation S
         in compliance with the exemption from registration under the Securities
         Act provided by Rule 904 under the Securities Act, provided that, if
                                                            --------
         such transfer is being effected by an Initial Foreign Purchaser or any
         foreign purchaser who has purchased Securities from an Initial Foreign
         Purchaser or from any person other than a QIB or an Institutional
         Accredited Investor pursuant to this paragraph (b) prior to the date
         that is 40 days following the Issue Date, the transferee shall have
         certified to the Company and the Trustee that such transferee is a
         non-U.S. person (within the meaning of Regulation S) and that such
         transferee is acquiring the Securities in an offshore transaction
         (within the meaning of Regulation S).

                  (2) Subject to paragraph (1) above, if (i) the proposed
         transferee is an Agent Member, and the Securities to be transferred
         consist of Physical Securities which after transfer are to be evidenced
         by an interest in the Regulation S Global Security, upon receipt by the
         Security Registrar of instructions given in accordance with the
         Depository's, the Common Depositary's (or Euroclear's and
         Clearstream's, as the case may be) and the Security Registrar's
         procedures,
<PAGE>

                                                                              67

         the Security Registrar shall reflect on the Security Register the date
         and an increase in the principal amount of the Regulation S Global
         Security in an amount equal to the principal amount of the Physical
         Securities to be transferred, and the Trustee shall cancel the Physical
         Securities so transferred, and (ii) the proposed transferor is an Agent
         Member holding a beneficial interest in a Rule 144A Global Security or
         an Institutional Accredited Investor Global Security, upon receipt by
         the Security Registrar of instructions given in accordance with the
         Depository's, the Common Depositary's (or Euroclear's and
         Clearstream's, as the case may be) and the Security Registrar's
         procedures, the Security Registrar shall reflect on its books and
         records the date of such transfer and (A) a decrease in the principal
         amount of such Rule 144A Global Security or Institutional Accredited
         Investor Global Security, as the case may be, in an amount equal to the
         principal amount to be transferred and (B) an increase in the principal
         amount of a Regulation S Global Security in an amount equal to the
         principal amount to be transferred.
<PAGE>

                                                                              68

         (c)  Transfers to QIBs. The following provisions shall apply with
              ------------------
respect to the registration of any proposed transfer of a Security to any QIB
(excluding transfers to non-U.S. persons):

                  (1) The Security Registrar shall register the transfer of any
         Security if (x) the requested transfer is not prior to that date which
         is two years (or such shorter period as may be prescribed by Rule
         144(k) under the Securities Act or any successor provision thereunder)
         after the later of the original issue date of such Security (or of any
         Predecessor Security) or three months after the last day on which the
         Company or any Affiliate of the Company was the owner of such Security
         or any Predecessor Security or (y) such transfer is being made by a
         proposed transferor who has checked the box provided for on the form of
         Security stating, or who has otherwise advised the Company and the
         Security Registrar in writing, that the transfer has been made in
         compliance with the exemption from registration under the Securities
         Act provided under Rule 144A to a transferee who has signed the
         certification provided for on the form of Security stating, or has
         otherwise advised the Company and the Security Registrar in writing,
         that such transferee represents and warrants that it is purchasing the
         Security for its own account or an account with respect to which it
         exercises sole investment discretion and that each of it and any such
         account is a QIB within the meaning of Rule 144A and is aware that the
         sale to it is being made in reliance on Rule 144A and acknowledges that
         it has received such information regarding the Company as it has
         requested pursuant to Rule 144A or has determined not to request such
         information and that it is aware that the transferor is relying upon
         the foregoing representations in order to claim the exemption from
         registration provided by Rule 144A.

                  (2) Subject to paragraph (1) above, if (i) the proposed
         transferee is an Agent Member, and the Securities to be transferred
         consist of Physical Securities which after transfer are to be evidenced
         by an interest in the Rule 144A Global Security, upon receipt by the
         Security Registrar of instructions given
<PAGE>

                                                                              69

         in accordance with the Depository's and the Security Registrar's
         procedures, the Security Registrar shall reflect on the Security
         Register the date and an increase in the principal amount of the Rule
         144A Global Security in an amount equal to the principal amount of the
         Physical Securities to be transferred, and the Trustee shall cancel the
         Physical Securities so transferred, and (ii) the proposed transferor is
         an Agent Member holding a beneficial interest in an Institutional
         Accredited Investor Global Security or a Regulation S Global Security,
         upon receipt by the Security Registrar of instructions given in
         accordance with the Depository's and the Security Registrar's
         procedures, the Security Registrar shall reflect on its books and
         records the date of such transfer and (A) a decrease in the principal
         amount of such Institutional Accredited Investor Global Security or
         Regulation S Global Security, as the case may be, in an amount equal to
         the principal amount to be transferred and (B) an increase in the
         principal amount of a Rule 144A Global Security in an amount equal to
         the principal amount to be transferred.

         (d) Private Placement Legend. (1) Upon the registration of transfer,
             -------------------------
exchange or replacement of Securities, the Security Registrar shall deliver only
Securities that bear the Private Placement Legend unless (i) the transfer or
exchange of Initial Securities contemplated by paragraph (d)(2) or (d)(3) below
has occurred or (ii) (x) the circumstances contemplated by clause (a)(1)(x),
(b)(1)(x) or (c)(1)(x) of this Section 313 exist and (y) there is delivered to
the Security Registrar and the Trustee an Opinion of Counsel reasonably
satisfactory to the Company and the Trustee to the effect that neither such
legend nor the related restrictions on transfer are required in order to
maintain compliance with the provisions of the Securities Act.

                  (2) After a transfer of any Initial Securities during the
         period of the effectiveness of a Shelf Registration Statement with
         respect to such Initial Securities, all requirements pertaining to
         legends on such Initial Security will cease to apply, the requirements
         requiring that any such Initial Security be issued in global form will
         cease to apply, and an
<PAGE>

                                                                              70

         Initial Security in certificated or global form without legends will be
         available to the transferee of the Holder of such Initial Securities
         upon exchange of such transferring Holder's certificated Initial
         Security. Upon the occurrence of any of the circumstances described in
         this paragraph, the Company will deliver an Officers' Certificate to
         the Trustee instructing the Trustee to issue Securities without
         legends.

                  (3) Upon the consummation of a Registered Exchange Offer with
         respect to the Initial Securities pursuant to which certain Holders of
         such Initial Securities are offered Exchange Securities (other than
         Private Exchange Securities) in exchange for their Initial Securities,
         all requirements pertaining to such Initial Securities that Initial
         Securities be issued in global form will cease to apply, and
         certificated Initial Securities with the Private Placement Legend will
         be available to Holders of such Initial Securities that do not exchange
         their Initial Securities, and Exchange Securities in certificated or
         global form will be available to Holders that exchange such Initial
         Securities in such Registered Exchange Offer. Upon the occurrence of
         any of the circumstances described in this paragraph, the Company will
         deliver an Officers' Certificate to the Trustee instructing the Trustee
         to issue Securities without legends.

                  (4) Upon the consummation of a Private Exchange Offer with
         respect to the Initial Securities pursuant to which Holders of such
         Initial Securities are offered Private Exchange Securities in exchange
         for their Initial Securities, all requirements pertaining to such
         Initial Securities that Initial Securities issued to certain Holders be
         issued in global form will continue to apply, and Private Exchange
         Securities in global form will be available to Holders that exchange
         such Initial Securities in such Private Exchange Offer.

         (e) Other Transfers. If a Holder proposes to transfer a Security
             ----------------
pursuant to any exemption from the registration requirements of the Securities
Act other than as provided for by Sections 313(a), 313(b) and 313(c) and other
than pursuant to Section 313(d)(4), the Security Registrar shall only register
such transfer or exchange if such transferor delivers to the Security Registrar
and the Trustee an
<PAGE>

                                                                              71

Opinion of Counsel satisfactory to the Company and the Security Registrar that
such transfer is in compliance with the Securities Act and the terms of this
Indenture.

         (f) General. By its acceptance of any Security bearing the Private
             --------
Placement Legend, each Holder of such a Security acknowledges the restrictions
on transfer of such Security set forth in this Indenture and in the Private
Placement Legend and agrees that it will transfer such Security only as provided
in this Indenture.

         The Security Registrar shall retain copies of all letters, notices and
other written communications received pursuant to Section 312 or this Section
313 for a period of two years, during which time such letters, notices and other
written communications shall at the written request of the Company be delivered
to the Company. After retaining any such copies of letters, notices and other
written communications for a period of at least two years, all such copies may
be destroyed by the Trustee. The Company shall have the right to inspect and
make copies of all such letters, notices or other written communications at any
reasonable time upon the giving of reasonable prior written notice to the
Security Registrar.

                                 ARTICLE FOUR

                          SATISFACTION AND DISCHARGE

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

         This Indenture shall cease to be of further effect (subject to Section
1206 and except as to surviving rights of registration of transfer, transfer,
exchange and replacement of Securities expressly provided for herein or pursuant
hereto) and the Trustee, at the expense of the Company, shall execute proper
instruments acknowledging satisfaction and discharge of this Indenture when

                  (1) either

                           (a) all Outstanding Securities have been delivered to
                  the Trustee for cancellation; or
<PAGE>

                                                                              72

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

                                    (i) have become due and payable, or

                                   (ii) will become due and payable within one
                           year, or

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

                  and the Company, in the case of (i), (ii) or (iii) above, has
                  irrevocably deposited or caused to be deposited with the
                  Trustee funds in an amount sufficient to pay and discharge the
                  entire indebtedness on the Securities not theretofore
                  delivered to the Trustee for cancellation, for principal of
                  (and premium, if any, on), and interest on, the Securities to
                  Maturity or the Redemption Date, as the case may be;

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

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

         Notwithstanding the satisfaction and discharge of this Indenture, the
obligations under Sections 607 and 609 and, if money shall have been deposited
with the Trustee pursuant to clause (1)(b) of this Section 401, the obligations
of the Trustee under Section 402 and the last paragraph of Section 1003 shall
survive.
<PAGE>

                                                                              73

         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 thereto, of the principal (and premium, if
any) and interest for whose payment such money has been deposited with the
Trustee; but such money need not be segregated from other funds except to the
extent required by law.

                                 ARTICLE FIVE

                                   REMEDIES

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

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

                  (1) failure to pay principal of (or premium, if any, on) any
         Security when due; or

                  (2) failure to pay any interest on any Security when due,
         continued for 30 days; or

                  (3) default in the payment of principal of (and premium, if
         any) and interest on Securities required to be purchased pursuant to an
         Offer to Purchase pursuant to Section 1009 when due and payable; or

                  (4) failure to perform or comply with the provisions of
         Section 801, 803 or 1016; or

                  (5) failure to perform any covenant or agreement of the
         Company or any Guarantor in this Indenture or in any Security (other
         than a covenant a default in whose performance is elsewhere in this
         Section specifically
<PAGE>

                                                                              74

         dealt with) continued for 60 days after written notice to the Company
         by the Trustee or Holders of at least 25% in aggregate principal amount
         of the Outstanding Securities, which notice shall specify the default
         and state that such notice is a "Notice of Default" hereunder; or

                  (6) default under the terms of any instrument evidencing or
         securing Debt of the Company or any Restricted Subsidiary having an
         outstanding principal amount of not less than $25,000,000 or its
         foreign currency equivalent at the time which default results in the
         acceleration of the payment of such indebtedness or constitutes the
         failure to pay such indebtedness when due (after expiration of any
         applicable grace period); or

                  (7) the rendering of a judgment or judgments against the
         Company or any Restricted Subsidiary in an aggregate amount in excess
         of $25,000,000 or its foreign currency equivalent at the time and shall
         not be waived, satisfied or discharged for any period of 45 consecutive
         days during which a stay of enforcement shall not be in effect; or

                  (8) any Restricted Subsidiary Guarantee ceases to be in full
         force and effect (other than in accordance with the terms of such
         Restricted Subsidiary Guarantee) or any Guarantor denies or disaffirms
         its obligations under its Restricted Subsidiary Guarantee; or

                  (9) the entry of a decree or order by a court having
         jurisdiction in the premises 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 the
         Federal Bankruptcy Code or any other applicable federal, state or
         foreign law, or appointing a receiver, liquidator, assignee, trustee,
         custodian or 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
<PAGE>

                                                                              75

         continuance of any such decree or oder unstayed and in effect for a
         period of 60 consecutive days; or

                  (10) the institution by the Company or any Significant
         Subsidiary of proceedings to be adjudicated a bankrupt or insolvent, or
         the consent by it to the institution of bankruptcy or insolvency
         proceedings against it, or the filing by it of a petition or answer or
         consent seeking reorganization or relief under the Federal Bankruptcy
         Code or any other applicable federal, state or foreign law, or the
         consent by it to the filing of any such petition or to the appointment
         of a receiver, liquidator, assignee, trustee, custodian or 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.

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

         If an Event of Default (other than an Event of Default specified in
Section 501(9) or 501(10) with respect to the Company) shall occur and be
continuing, the Trustee or the Holders of not less than 25% in aggregate
principal amount of the Outstanding Securities may declare the principal 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 principal amount shall become immediately due and payable. If
an Event of Default specified in Section 501(9) or 501(10) occurs with respect
to the Company, the principal amount of all the Securities shall ipso facto
                                                                 ---- -----
become immediately due and payable without any declaration or other act on the
part of the Trustee or any Holder.
<PAGE>

                                                                              76

         At any time after a declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter provided in this Article Five, 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 Outstanding
                  Securities,

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

                           (C) to the extent that payment of such interest is
                  lawful, interest on overdue interest at the 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 nonpayment of
         amounts of principal of (or premium, if any, on) 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

                  (a) default is made in the payment of any interest on any
         Security when due, continued for 30 days, or
<PAGE>

                                                                              77

                  (b) default is made in the payment of the principal of (or
         premium, if any, on) any Security when due,

the Company will, upon demand of the Trustee, pay to the Trustee 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 interest on any
overdue principal (and premium, if any) and, to the extent that payment of such
interest shall be legally enforceable, upon any overdue installment of interest,
at the rate borne by the Securities, and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

         If the Company fails to pay such amounts forthwith upon such demand,
the Trustee, in its own name as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon the 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
effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.
<PAGE>

                                                                              78

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

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

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

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

and any custodian, receiver, assignee, trustee, liquidator or 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 the Trustee any amount due it for the reasonable compensation, expenses,
disbursements and advances of the Trustee and its agents and counsel, and any
other amounts due the Trustee under Section 607.

         Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof, or to
<PAGE>

                                                                              79

authorize the Trustee to vote in respect of the claim of any Holder in any such
proceeding.

         SECTION 505.  Trustee May Enforce Claims Without Possession of
                       ------------------------------------------------
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
and as trustee of an express trust, and any recovery of judgment shall, after
provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee and 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 Five 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:

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

                 SECOND:  To the payment of the amounts then due and unpaid for
         principal of (and premium, if any) and interest on the 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; and

                 THIRD:   The balance, if any, to the Person or Persons entitled
         thereto.
<PAGE>

                                                                              80

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

         No Holder of any Securities shall have any right to institute any
proceeding with respect to this Indenture or for any other remedy hereunder,
unless

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

                  (2)  the Holders of not less than 25% in aggregate principal
         amount of the Outstanding Securities shall have made written request
         and offered reasonable indemnity to the Trustee to institute such
         proceeding as trustee; and

                  (3)  the Trustee shall not have received from the Holders of a
         majority in aggregate principal amount of the Outstanding Securities a
         direction inconsistent with such request and shall have failed to
         institute such proceeding within 60 days;

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

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

         Notwithstanding any other provision in this Indenture, including
Section 507, the Holder of any Security shall have the right, which is absolute
and unconditional, to receive payment as provided herein (including, if
applicable, Article Twelve) and in such Security 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) and to institute suit for the enforcement of
any such payment, and such rights shall not be impaired without the consent of
such Holder.
<PAGE>

                                                                              81

         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 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 Five 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.
<PAGE>

                                                                              82

         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,

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

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

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

         The Holders of not less than a majority in principal amount of the
Outstanding Securities may, on behalf of the Holders of all the Securities,
waive any past Default hereunder and its consequences, except a Default

                  (1)  in the payment of the principal of (or premium, if any)
         or interest on any Security, 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.

         The Company shall deliver to the Trustee an Officers' Certificate
stating that the requisite majority have consented to such waiver and attaching
such consents upon which, subject to Section 104, the Trustee may conclusively
rely. Upon any such waiver, such default shall cease to exist, and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Indenture; but no such waiver shall extend to any subsequent or other
default or Event of Default or impair any right consequent thereon.
<PAGE>

                                                                              83

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

         The Company covenants (to the extent that it may lawfully do so) that
it shall 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 shall not hinder, delay or impede the execution of any
power herein granted to the Trustee, but shall suffer and permit the execution
of every such power as though no such law had been enacted.

                                  ARTICLE SIX

                                  THE TRUSTEE

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

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

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

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

         (b)  In case an Event of Default has occurred and is continuing, the
Trustee shall exercise such of the rights
<PAGE>

                                                                              84

and powers vested in it by this Indenture, and use the same degree of care and
skill in their exercise, as a prudent person would exercise or use under the
circumstances in the conduct of such person's own affairs.

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

               (1)  this paragraph (c) shall not be construed to limit the
         effect of paragraph (a) of this Section 601;

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

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

               (4)  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 indemnity
         reasonably satisfactory to it against such risk or liability is not
         reasonably assured to it.

         (d)   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 601.
<PAGE>

                                                                              85

         SECTION 602.  Notice of Default.
                       ------------------

         If a Default occurs and is continuing, the Trustee shall transmit, in
the manner and to the extent provided in TIA Section 313(c), notice of such
Default within 60 days after it is known to any Responsible Officer of the
Trustee or written notice of it is received by the Trustee; provided, however,
                                                            --------  -------
that, except in the case of a Default in the payment of the principal of (or
premium, if any) or interest on any Security, the Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee, a trust committee of directors or Responsible Officers of the Trustee
in good faith determines that the withholding of such notice is in the interest
of the Holders.

         The Trustee is not required to take notice or deemed to have notice of
any Event of Default with respect to the Securities, except an Event of Default
under Section 501(1), (2), (3) or (4) hereof (provided that in the case of
Section 501(4), such Event of Default constitutes a failure to purchase
Securities pursuant to an Offer to Purchase pursuant to Section 1016), unless
the Trustee shall have received written notice at its Corporate Trust Office
(which notice shall reference the Securities, the Company and the Indenture) of
such Event of Default from the Company or any Holder or unless a Responsible
Officer of the Trustee shall otherwise have knowledge thereof.

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

         Subject to Section 601 and to the provisions of TIA Sections 315(a)
through 315(d):

                  (1)  the Trustee may conclusively rely and shall be fully
         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;

                  (2)  any request or direction of the Company mentioned herein
         shall be sufficiently evidenced by a
<PAGE>

                                                                              86

Company Request or Company Order and any resolution of the Board of Directors
may be sufficiently evidenced by a Board Resolution;

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

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

                  (5)  the Trustee may act through counsel, agents, custodians
         and nominees and shall not be responsible for the misconduct or
         negligence of any such person appointed and supervised with due care
         and in good faith;

                  (6)  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 security or indemnity
         reasonably satisfactory to it against the costs, expenses and
         liabilities which might be incurred by it in compliance with such
         request or direction;

                  (7)  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; and
<PAGE>

                                                                              87

                  (8)  the Trustee shall not be liable for any action taken,
         suffered or omitted by it in good faith and believed by it to be
         authorized or within the discretion or rights or powers conferred upon
         it by this Indenture.

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

         The recitals contained herein and in the Securities, except for the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture or of the Securities, except that the Trustee represents that it is
duly authorized to execute and deliver this Indenture, authenticate the
Securities and perform its obligations hereunder. 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 or any other
agent of the Company or of the Trustee, in its individual or any other capacity,
may become the owner or pledgee of Securities and, subject to TIA Sections
310(b) and 311, may otherwise deal with the Company with the same rights it
would have if it were not Trustee, Paying Agent, 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.
<PAGE>

                                                                              88

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

         The Company agrees:

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

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

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

         The obligations of the Company under this Section 607 to compensate the
Trustee, to pay or reimburse the Trustee for expenses, disbursements and
advances and to indemnify and hold harmless the Trustee shall constitute
additional indebtedness hereunder. As security for the performance of such
obligations of the Company, the Trustee shall have a claim prior to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of (and premium, if any,
on) or interest on particular Securities.
<PAGE>

                                                                              89

         When the Trustee incurs expenses or renders services in connection with
an Event of Default specified in Section 501(9) or (10), the expenses (including
the reasonable charges and expenses of its counsel) of and the compensation for
such services are intended to constitute expenses of administration under any
applicable federal, state or foreign bankruptcy, insolvency or other similar
law.

         The provisions of this Section 607 shall survive the termination of
this Indenture or the earlier resignation or removal of the Trustee.

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

         (a)  There shall be at all times a Trustee hereunder which shall be
subject to and comply with the provisions of Section 310(a)(1) of the Trust
Indenture Act and shall have a combined capital and surplus of at least
$50,000,000. If such Person publishes reports of condition at least annually,
pursuant to law or to the requirements of federal, state, territorial or
District of Columbia supervising or examining authority, then, for the purposes
of this Section 608, 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 a Responsible Officer of the
Trustee shall have actual knowledge that the Trustee ceases to be eligible in
accordance with the provisions of this Section 608, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article Six.

         (b)  The Trustee shall be subject to and comply with Section 310(b) of
the Trust Indenture Act.

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

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

                                                                              90

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

         (c)  The Trustee may be removed at any time by Act of the Holders of
not less than a majority in aggregate 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 the provisions of
         TIA Section 310(b) after written request therefor by the Company or by
         any Holder who has been a bona fide Holder of a Security for at least
         six months, or

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

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

then, in any such case, (i) the Company, by a Board Resolution, may remove the
Trustee or (ii) subject to TIA Section 315(e), any Holder who has been a bona
fide Holder of a 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 a Board
<PAGE>

                                                                              91

Resolution, shall promptly appoint a successor Trustee. If the Company does not
promptly appoint a successor Trustee 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 aggregate principal amount of
the Outstanding Securities delivered to the Company and the retiring Trustee. In
either case, 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 the Holders of
Securities in the manner provided for in Section 106. Each notice shall include
the name of the successor Trustee and the address of its Corporate Trust Office.

         (g)  The retiring Trustee shall not be liable for any of the acts or
omissions of any successor Trustee appointed hereunder.

         SECTION 610.   Acceptance of Appointment by Successor.
                        ---------------------------------------
<PAGE>

                                                                              92

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

                                                                              93

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

         Any Person into which the Trustee may be merged or converted or with
which it may be consolidated, or any Person resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any Person
succeeding to all or substantially all of the corporate trust business of the
Trustee, shall be the successor of the Trustee hereunder; provided that such
                                                          --------
Person shall be otherwise qualified and eligible under this Article Six, 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, consolidation or transfer of assets 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. In case at that time any of the Securities shall not have been
authenticated, any successor Trustee may authenticate such Securities either in
the name of any predecessor hereunder or in the name of the successor Trustee.
In all such cases such certificates shall have the full force and effect which
this Indenture provides that the certificate of authentication of the Trustee
shall have; provided, however, that the right to adopt the certificate of
            --------  -------
authentication of any predecessor Trustee or to authenticate Securities in the
name of any predecessor Trustee shall apply only to its successor or successors
by merger, conversion, consolidation or transfer of assets.

                                 ARTICLE SEVEN

               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

         SECTION 701.  Disclosure of Names and Addresses of Holders.
                       ---------------------------------------------
<PAGE>

                                                                              94

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

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

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

         A copy of each such report at the time of its mailing to Holders shall
be filed with the Commission and the principal national securities exchange (if
any) on which the Securities are listed.

         The Company shall notify a Responsible Officer of the Trustee if the
Securities become listed on any national securities exchange or of any delisting
thereof.

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

         The Company shall file with the Trustee and deliver to the Holders of
Securities the reports and other information required to be provided by it
pursuant to Section 1007.
<PAGE>

                                                                              95

                                 ARTICLE EIGHT

             CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

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

     The Company shall not, in a single transaction or a series of related
transactions, (i) consolidate with or merge into any other Person or Persons or
permit any other Person to consolidate with or merge into the Company or (ii)
directly or indirectly, transfer, sell, lease, convey or otherwise dispose of
all or substantially all its assets to any other Person or Persons, unless:

          (1)  in a transaction in which the Company is not the surviving
     Person or in which the Company transfers, sells, leases, conveys or
     otherwise disposes of all or substantially all of its assets to any other
     Person, the resulting, surviving or transferee Person (the "successor
     entity") is 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 before and after giving effect to such
     transaction and treating any Debt which becomes an obligation of the
     Company (or the successor entity) or a Restricted Subsidiary as a result of
     such transaction as having been Incurred by the Company or such Restricted
     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 the successor entity) is equal to
     or greater than that of the Company immediately prior to the transaction;

          (4)  immediately after giving effect to such transaction and
     treating any Debt which becomes an obligation of the Company (or the
     successor entity) or
<PAGE>

                                                                              96

     a Restricted Subsidiary as a result of such transaction as having been
     Incurred by the Company or such Restricted Subsidiary at the time of the
     transaction, the Company (or the successor entity) could Incur at least
     $1.00 of additional Debt pursuant to the provisions of paragraph (a) of
     Section 1010;

          (5)  if, as a result of any such transaction, Property of the
     Company (or the successor entity) or any Restricted Subsidiary would become
     subject to a Lien prohibited by the provisions of Section 1014, the Company
     (or the successor entity) shall have secured the Securities as required by
     said covenant;

          (6)  in the case of a transfer, sale, lease, conveyance or
     other disposition of all or substantially all of the assets of the Company,
     such assets shall have been transferred as an entirety or virtually as an
     entirety to one Person and such Person shall have complied with all the
     provisions of this paragraph; and

          (7)  the Company has delivered to the Trustee an Officers'
      Certificate and an Opinion of Counsel, each in form and substance
      reasonably satisfactory to the Trustee, stating that such consolidation,
      merger, transfer, sale, lease, conveyance or other disposition 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 Officers' Certificate,
      setting forth the manner of determination of the Consolidated Net Worth,
      in accordance with clause (3) of this Section 801, of the Company or, if
      applicable, of the successor entity as required pursuant to the foregoing.
<PAGE>

                                                                              97

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

     Upon any consolidation of the Company with or merger of the Company
with or into any other Person or any transfer, sale, lease, conveyance or other
disposition of all or substantially all the assets of the Company to any Person
or Persons in accordance with Section 801, the successor Person formed by such
consolidation or into which the Company is merged or to which such transfer,
sale, lease, conveyance or other disposition 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 the predecessor Company (which term shall for this
purpose mean the Person named as the "Company" in the first paragraph of this
Indenture or any successor Person which shall have become such in the manner
described in Section 801), except in the case of a lease, shall be released from
all its obligations and covenants under this Indenture and the Securities and
may be dissolved and liquidated.

     SECTION 803.  Guarantor May Consolidate, etc., Only on Certain Terms.
                   -------------------------------------------------------

     The Company shall not permit any Guarantor to, in a single transaction
or a series of related transactions, (i) consolidate with or merge into any
other Person or Persons (other than the Company or another Guarantor) or permit
any other Person (other than the Company or another Guarantor) to consolidate
with or merge into such Guarantor or (ii) directly or indirectly, transfer,
sell, lease, convey or otherwise dispose of all or substantially all its assets
to any other Person or Persons (other than the Company or another Guarantor),
unless:

          (1)  in a transaction in which such Guarantor is not the
     surviving Person or in which such Guarantor transfers, sells, leases,
     conveys or otherwise disposes of all or substantially all of its assets to
     any other Person, the resulting, surviving or transferee Person (the
     "successor guarantor") is 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
<PAGE>

                                                                              98

     Trustee in form satisfactory to the Trustee, all of such Guarantor's
     obligations under this Indenture;

          (2)  immediately before and after giving effect to such
     transaction and treating any Debt which becomes an obligation of the
     Company or a Restricted Subsidiary (including the successor guarantor) as a
     result of such transaction as having been Incurred by the Company or such
     Restricted 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 is equal to or greater than that of
     the Company immediately prior to the transaction;

          (4)  immediately after giving effect to such transaction and
     treating any Debt which becomes an obligation of the Company or a
     Restricted Subsidiary (including the successor guarantor) as a result of
     such transaction as having been Incurred by the Company or such Restricted
     Subsidiary at the time of the transaction, the Company could Incur at least
     $1.00 of additional Debt pursuant to the provisions of paragraph (a) of
     Section 1010;

          (5)  if, as a result of any such transaction, Property of the
     Company or any Restricted Subsidiary (including the successor guarantor)
     would become subject to a Lien prohibited by the provisions of Section
     1014, the Company shall have secured the Securities as required by said
     covenant;

          (6)  in the case of a transfer, sale, lease, conveyance or
     other disposition of all or substantially all of the assets of such
     Guarantor, such assets shall have been transferred as an entirety or
     virtually as an entirety to one Person and such Person shall have complied
     with all the provisions of this paragraph; and

          (7)  the Company has delivered to the Trustee an Officers'
     Certificate and an Opinion of Counsel, each in form and substance
     reasonably satisfactory to the Trustee, stating that such consolidation,
     merger,
<PAGE>

                                                                              99

     transfer, sale, lease, conveyance or other disposition 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 Officers' Certificate,
     setting forth the manner of determination of the Consolidated Net Worth, in
     accordance with clause (3) of this Section 803, of such Guarantor or, if
     applicable, of the successor guarantor as required pursuant to the
     foregoing.

     SECTION 804.  Successor Guarantor Substituted.
                   --------------------------------

     Upon any consolidation of a Guarantor with or merger of a Guarantor
with or into any other Person or any transfer, sale, lease, conveyance or other
disposition of all or substantially all the assets of a Guarantor to any Person
or Persons in accordance with Section 803, the successor Person formed by such
consolidation or into which such Guarantor is merged or to which such transfer,
sale, lease, conveyance or other disposition is made shall succeed to, and be
substituted for, and may exercise every right and power of, such Guarantor under
this Indenture with the same effect as if such successor Person had been named
as a Guarantor herein, and the predecessor Guarantor (which term shall for this
purpose mean the Person named as the "New Guarantor" in the first paragraph of
the applicable supplemental indenture or any successor Person which shall have
become such in the manner described in Section 803), except in the case of a
lease, shall be released from all its obligations and covenants under its
Restricted Subsidiary Guarantee and the Securities and may be dissolved and
liquidated.
<PAGE>

                                                                             100

                                 ARTICLE NINE

                            SUPPLEMENTAL INDENTURES

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

     The Company and the Trustee may, at any time and from time to time,
without notice to or consent of any Holders of Securities, enter into one or
more indentures supplemental hereto:

          (1)  to evidence the succession of another Person to the Company or
     a Guarantor and the assumption by such successor of the covenants of the
     Company or such Guarantor 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 conferred upon the Company
     hereby; or

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

          (4)  to provide for uncertificated Securities in addition to or in
     place of certificated Securities; or

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

          (6)  to secure the Securities; or

          (7)  to comply with the Trust Indenture Act or the Securities Act
     (including Regulation S promulgated thereunder); or

          (8)  to add additional Guarantees with respect to the Securities or
     to release Guarantors from Restricted Subsidiary Guarantees as provided by
     the terms of this Indenture; or

          (9) to cure any ambiguity herein, to correct or supplement any
     provision herein which may be inconsistent with any other provision
     herein, or to add any other provision with respect to matters or
<PAGE>

                                                                             101

     questions arising under this Indenture; provided such 84 actions shall not
                                             --------
     adversely affect the interests of the Holders in any material respect; or

          (10) to make any change to Section 312 hereof or the Securities
     relating to book-entry procedures for Global Securities to facilitate
     trading or transferring the Securities in book-entry form.

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

     With the consent of the Holders of not less than a majority in principal
amount of the Outstanding Securities, by Act of such Holders delivered to the
Company and the Trustee, the Company and the Trustee may enter into one or more
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
waiving or otherwise modifying in any manner the rights of the Holders, provided
                                                                        --------
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 interest thereon that would be due and payable upon the
     Stated Maturity thereof, 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

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

          (3)  subordinate in right of payment, or otherwise subordinate, the
     Securities to any other Debt; or
<PAGE>

                                                                             102

          (4)  except as otherwise provided herein, release any security
     interest that may have been granted in favor of the Holders of the
     Securities; or

          (5)  reduce the premium payable upon the redemption of any Security
     nor change the time at which any Security may be redeemed, as described in
     Exhibit A; or

          (6)  reduce the premium payable upon a Change of Control Triggering
     Event or, at any time after a Change of Control Triggering Event has
     occurred, change the time at which the Offer to Purchase relating thereto
     must be made or at which the Securities must be repurchased pursuant to
     such Offer to Purchase; or

          (7)  at any time after the Company is obligated to make an Offer to
     Purchase with the Net Available Proceeds from Asset Dispositions, change
     the time at which such Offer to Purchase must be made or at which the
     Securities must be repurchased pursuant thereto; or

          (8)  make any change in any Restricted Subsidiary Guarantee that
     would adversely affect the Holders of the Securities; or

          (9)  modify any provision of this Section 902 (except to increase any
     percentage set forth herein).

     It shall not be necessary for any Act of Holders under this Section 902
to approve the particular form of any proposed supplemental indenture, but it
shall be sufficient if such Act shall approve the substance thereof.
<PAGE>

                                                                             103

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

     In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article Nine or the modifications
thereby of the trusts created by this Indenture, the Trustee shall be entitled
to receive, and shall be fully protected in relying upon, an Opinion of Counsel
stating that the execution of such supplemental indenture is authorized or
permitted by this Indenture and an Officers' Certificate stating that all
conditions precedent to the execution of such supplemental indenture have been
fulfilled. 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
Nine, 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 Nine
shall conform as a matter of contract or law to the requirements of the Trust
Indenture Act as then in effect.

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

     Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article Nine may bear a notation in form
approved by the Trustee and the Company 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.
<PAGE>

                                                                             104

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

     Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to this Article Nine, the Company shall give
notice thereof to the Holders of each Outstanding Security affected, in the
manner provided for in Section 106, setting forth in general terms the substance
of such supplemental indenture.

                                  ARTICLE TEN

                                   COVENANTS

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

     The Company covenants and agrees for the benefit of the Holders that it
shall 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 shall maintain in The City of 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 Corporate Trust Office of the Trustee shall be such
office or agency of the Company, unless the Company shall designate and maintain
some other office or agency for one or more of such purposes. The Company shall
give prompt written notice to the Trustee of any change in the location of any
such office or agency. If at any time the Company shall fail to maintain any
such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the Corporate Trust Office of the Trustee, and the Company hereby
appoints the Trustee as its agent to receive all such presentations, surrenders,
notices and demands.
<PAGE>

                                                                             105

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

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

     If the Company shall at any time act as its own Paying Agent, it shall,
on or before each due date of the principal of (or 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 of (or premium,
if any) or interest so becoming due until such sums shall be paid to such
Persons or otherwise disposed of as herein provided and shall promptly notify
the Trustee of its action or failure so to act.

     Whenever the Company shall have one or more Paying Agents for the
Securities, it shall, on or before each due date of the principal of (or
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 of such action or
any failure so to act.
<PAGE>

                                                                             106

     The Company shall 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 1003,
that such Paying Agent shall:

          (1)  hold all sums held by it for the payment of the principal
     of, 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, 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

          (4)  indemnify the Trustee and its officers, directors, employees and
     agents against any loss, cost or liability caused by, or incurred as a
     result of, such Paying Agent's acts or omissions.

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

     Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of, premium, if any,
or interest on any Security and remaining unclaimed for two years after such
principal, premium or interest has become due and payable shall be paid to the
Company on Company Request or (if then held by the Company) shall be discharged
from such trust;
<PAGE>

                                                                             107

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, 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.  Corporate Existence.
                    --------------------

     Subject to Article Eight, the Company shall do or cause to be done all
things necessary to preserve and keep in full force and effect the corporate
existence, rights (charter and statutory) and franchises of the Company and each
Subsidiary of the Company; provided, however, that the Company shall not be
                           --------  -------
required to preserve, with respect to the Company, any such right or franchise
or, with respect to any such Subsidiary (subject to all the other covenants in
this Indenture), any such corporate existence, right or franchise, if the Board
of Directors shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Company and its Subsidiaries as
a whole and that the loss thereof is not disadvantageous in any material respect
to the Holders.
<PAGE>

                                                                             108

     SECTION 1005.  Maintenance of Properties.
                    --------------------------

     The Company shall cause all properties owned by the Company or any
Restricted Subsidiary or used or held for use in the conduct of its business or
the business of any Restricted Subsidiary to be maintained and kept in good
condition, repair and working order and supplied with all necessary equipment
and shall 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 1005 shall prevent the Company from discontinuing the
maintenance of any of such properties if such discontinuance is, in the judgment
of the Company, desirable in the conduct of its business or the business of any
Subsidiary and not disadvantageous in any material respect to the Holders.

     SECTION 1006.  Insurance.
                    ----------

     The Company shall at all times keep all of its and its Restricted
Subsidiaries' properties which are of an insurable nature insured with insurers,
believed by the Company to be responsible, against loss or damage to the extent
that property of similar character is usually so insured by companies similarly
situated and owning like properties.

     SECTION 1007.  Reports.
                    --------
<PAGE>

                                                                             109

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

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

     (a)  The Company shall deliver to the Trustee, on the date of delivery
of each annual report to be delivered pursuant to Section 1007, a brief
certificate from the principal executive officer, principal financial officer or
principal accounting officer as to his or her knowledge of the Company's
compliance during the period covered by such report with all conditions and
covenants under this Indenture. If the signer has knowledge of any noncompliance
that occurred during such period, the certificate shall describe its status and
what action the Company has taken or is taking or proposes to take with respect
thereto. For purposes of this Section 1008(a), such compliance shall be
determined without regard to any period of grace or requirement of notice under
this Indenture.

     (b)  When any Default has occurred and is continuing under this
Indenture, or if the trustee for or the holder of any other evidence of Debt of
the Company or any Restricted
<PAGE>

                                                                             110

Subsidiary gives any notice or takes any other action with respect to a claimed
default (other than with respect to Debt in the principal amount of less than
$25,000,000 or its foreign currency equivalent at the time), the Company shall,
within 30 days of such occurrence, notice or other action, deliver to the
Trustee by registered or certified mail or by telegram, telex or facsimile
transmission an Officers' Certificate specifying such event, notice or other
action, its status and what action the Company is taking or purposes to take
with respect thereto.

     SECTION 1009.  Change of Control Triggering Event.
                    -----------------------------------

     (a)  Upon the occurrence of a Change of Control Triggering Event, each
Holder shall have the right to require that the Company repurchase such Holder's
Securities in whole or in part in integral multiples of (Europe)1,000, in
accordance with the procedures set forth in this Section 1009 and this
Indenture.

     (b)  Within 30 days of the occurrence of both a Change of Control and a
Rating Decline with respect to the Securities (a "Change of Control Triggering
Event"), the Company will be required to make an Offer to Purchase all
Outstanding Securities at a price in cash equal to 101% of the principal amount
of the Securities on the purchase date, plus accrued and unpaid interest (if
any) to such purchase date (subject to the right of Holders of record on the
relevant record date to receive interest due on the relevant interest payment
date).

     (c)  The Company and the Trustee shall perform their respective
obligations for the Offer to Purchase as specified in the Offer. Prior to the
Purchase Date, the Company shall (i) accept for payment Securities or portions
thereof tendered pursuant to the Offer, (ii) irrevocably 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 (provided that such deposit
may be made no later than 10:00 A.M. New York City time on the Purchase Date if
the Company elects) and (iii) deliver or cause to be delivered to the Trustee
all Securities so accepted together with an Officers' Certificate stating the
Securities or
<PAGE>

                                                                             111

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. In the event that the
aggregate Purchase Price is less than the amount delivered by the Company to the
Trustee or the Paying Agent, the Trustee or the Paying Agent, as the case may
be, shall deliver the excess to the Company immediately after the Purchase Date.

     (d)  A "Change of Control" means the occurrence of any of the following
events:
<PAGE>

                                                                             112

          (i)  if any "person" or "group" (as such terms are used in Sections
     13(d) and 14(d) of the Exchange Act or any successor provisions to either
     of the foregoing), including any group acting for the purpose of acquiring,
     holding, voting or disposing of securities within the meaning of Rule 13d-
     5(b)(1) under the Exchange Act, other than any one or more of the Permitted
     Holders, becomes the "beneficial owner" (as defined in Rule 13d-3 under the
     Exchange Act, except that a person will be deemed to have "beneficial
     ownership" of all shares that any such person has the right to acquire,
     whether such right is exercisable immediately or only after the passage of
     time), directly or indirectly, of 35% or more of the total voting power of
     the Voting Stock of the Company; provided, however, that the Permitted
                                      --------  -------
     Holders are the "beneficial owners" (as defined in Rule 13d-3 under the
     Exchange Act, except that a person will be deemed to have "beneficial
     ownership" of all shares that any such person has the right to acquire,
     whether such right is exercisable immediately or only after the passage of
     time), directly or indirectly, in the aggregate of a lesser percentage of
     the total voting power of the Voting Stock of the Company than such other
     person or group (for purposes of this clause (i), such person or group
     shall be deemed to beneficially own any Voting Stock of a corporation (the
     "specified corporation") held by any other corporation (the "parent
     corporation") so long as such person or group beneficially owns, directly
     or indirectly, in the aggregate a majority of the total voting power of the
     Voting Stock of such parent corporation); or

          (ii)      the sale, transfer, assignment, lease, conveyance or
     other disposition, directly or indirectly, of all or substantially all the
     assets of the Company and the Restricted Subsidiaries, considered as a
     whole (other than a disposition of such assets as an entirety or virtually
     as an entirety to a Wholly Owned Restricted Subsidiary or one or more
     Permitted Holders) shall have occurred; or

          (iii)     during any period of two consecutive years, individuals
     who at the beginning of such period constituted the Board of Directors
     (together with any new
<PAGE>

                                                                             113

     directors whose election or appointment by such board or whose nomination
     for election by the shareholders of the Company was approved by a vote of a
     majority of the directors then still in office who were either directors at
     the beginning of such period or whose election or nomination for election
     was previously so approved) cease for any reason to constitute a majority
     of the Board of Directors then in office; or

          (iv)      the shareholders of the Company shall have approved any
     plan of liquidation or dissolution of the Company.

     (e)  The Company shall not be required to make an Offer to Purchase upon
a Change of Control Triggering Event if a third party makes the Offer to
Purchase in the manner, at the times and otherwise in compliance with the
requirements set forth in this Indenture applicable to an Offer to Purchase made
by the Company and purchases all Securities validly tendered and not withdrawn
under such Offer to Purchase.

     (f)  In the event that the Company makes an Offer to Purchase the
Securities, the Company shall 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. To the extent that the provisions of any
securities laws or regulations conflict with provisions of this Section, the
Company shall comply with the applicable securities laws and regulations and
shall not be deemed to have breached its obligations under this Section by
virtue thereof.

     SECTION 1010.  Limitation on Consolidated Debt.
                    --------------------------------
<PAGE>

                                                                             114

         (a) The Company shall not, and shall not permit any Restricted
Subsidiary to, directly or indirectly, Incur any Debt, unless, after giving pro
forma effect to such Incurrence and the receipt and application of the net
proceeds thereof, no Default or Event of Default would occur as a consequence of
such Incurrence or be continuing following such Incurrence and either (i) the
ratio of (A) the aggregate consolidated principal amount (or, in the case of
Debt issued at a discount, the then-Accreted Value) of Debt of the Company and
its Restricted Subsidiaries 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 or repaid since such balance
sheet date and the receipt and application of the net proceeds thereof, to (B)
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, would be less than 5.0 to 1.0, or (ii) the
Company's Consolidated Capital Ratio as of the most recent available quarterly
or annual balance sheet, after giving pro forma effect to (x) the Incurrence of
such Debt and any other Debt Incurred or repaid since such balance sheet date,
(y) the issuance of any Capital Stock (other than Disqualified Stock) of the
Company since such balance sheet date, including the issuance of any Capital
Stock to be issued concurrently with the Incurrence of such Debt, and (z) the
receipt and application of the net proceeds of such Debt or Capital Stock, as
the case may be, is less than 2.25 to 1.0.

         (b) Notwithstanding the foregoing limitation, the Company or any
Restricted Subsidiary may Incur any and all of the following (each of which
shall be given independent effect):

                  (i) Debt under the Securities, this Indenture or
         any Restricted Subsidiary Guarantee;

                 (ii) Debt under Credit Facilities in an aggregate principal
         amount outstanding or available (together with all refinancing Debt
         outstanding or available pursuant to clause (viii) below in respect of
         Debt previously Incurred pursuant to this clause (ii)) at any one time
         not to exceed the greater of (x) $750,000,000, which amount shall be
         permanently
<PAGE>

                                                                             115

         reduced by the amount of Net Available Proceeds used to repay Debt
         under the Credit Facilities, and not reinvested in
         Telecommunications/IS Assets or used to purchase Securities or repay
         other Debt, pursuant to and as permitted by Section 1016, and (y) 85%
         of the Eligible Receivables;

                (iii) Purchase Money Debt, provided that the amount of such
                                           --------
         Purchase Money Debt does not exceed 100% of the cost of the
         construction, installation, acquisition, lease, development or
         improvement of the applicable Telecommunications/IS Assets;

                 (iv) Subordinated Debt of the Company; provided, however, that
                                                        --------  -------
         the aggregate principal amount (or, in the case of Debt issued at a
         discount, the Accreted Value) of such Debt, together with any other
         outstanding Debt Incurred pursuant to this clause (iv), shall not
         exceed $500,000,000 at any one time (which amount shall be permanently
         reduced by the amount of Net Available Proceeds used to repay
         Subordinated Debt of the Company, and not reinvested in
         Telecommunications/IS Assets or used to purchase Securities or repay
         other Debt, pursuant to and as permitted by Section 1016), except to
         the extent such Debt in excess of $500,000,000 (A) is subordinated to
         all other Debt of the Company other than Debt Incurred pursuant to this
         clause (iv) in excess of such $500,000,000 limitation, (B) does not
         provide for the payment of cash interest on such Debt prior to the
         Stated Maturity of the Securities and (C) (1) does not provide for
         payments of principal of such Debt at stated maturity 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 the acceleration of any payment with respect to such Debt
         upon any event of default thereunder), in each case on or prior to the
         Stated Maturity of the Securities, and (2) does not permit redemption
         or other retirement (including pursuant to an offer to purchase made by
         the Company but excluding through conversion into Capital Stock of the
         Company, other than
<PAGE>

                                                                             116

         Disqualified Stock, without any payment by the Company or its
         Restricted Subsidiaries to the holders thereof other than in respect of
         fractional shares) of such Debt at the option of the holder thereof on
         or prior to the Stated Maturity of the Securities;

                  (v)  Debt outstanding on the Measurement Date;

                 (vi)  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 (x) upon the transfer, conveyance 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 (y) if for any reason such Restricted Subsidiary ceases to
         be a Restricted Subsidiary, the provisions of this clause (vi) shall no
         longer be applicable to such Debt and such Debt shall be deemed to have
         been Incurred by the issuer thereof at the time of such transfer,
         conveyance or other disposition or when such Restricted Subsidiary
         ceases to be a Restricted Subsidiary;

                (vii)  Debt Incurred by a Person prior to the time (A) such
         Person became a Restricted Subsidiary, (B) such Person merges into or
         consolidates with a Restricted Subsidiary or (C) another Restricted
         Subsidiary merges into or consolidates with such Person (in a
         transaction in which such Person becomes a Restricted Subsidiary),
         which Debt was not Incurred in anticipation of such transaction and was
         outstanding prior to such transaction;

               (viii)  Debt Incurred to renew, extend, refinance, defease,
         repay, prepay, repurchase, redeem, retire, exchange or refund (each, a
         "refinancing") Debt Incurred pursuant to clause (i), (ii), (iii), (v),
         (vii) or (xii) of this paragraph (b) or this clause (viii), in an
         aggregate principal amount (or if issued at a discount, the then-
         Accreted Value) not to exceed the aggregate principal amount (or if
         issued at a discount, the then-Accreted Value) of and accrued interest
         on the Debt so refinanced plus the amount of
<PAGE>

                                                                             117

         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 Board of Directors as necessary to
         accomplish such refinancing by means of a tender offer or privately
         negotiated repurchase, plus the expenses of the Company Incurred in
         connection with such refinancing; provided, however, that (A) the
                                           --------  -------
         refinancing Debt shall not be senior in right of payment to the Debt
         that is being refinanced and (B) in the case of any refinancing of Debt
         Incurred pursuant to clause (i), (v), (vii) or (xii) or, if such Debt
         previously refinanced Debt Incurred pursuant to any such clause, this
         clause (viii), 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 stated
         maturity 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 the acceleration of any payment with
         respect to 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 (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 time the
         same are required by the terms of the Debt being refinanced, other
         than, in the case of clause (x) or (y), any such payment, 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 pursuant to provisions
         substantially similar to those described under Section 1009;

                 (ix)  Debt (A) in respect of performance, surety or appeal
         bonds, Guarantees, letters of credit or reimbursement obligations
         Incurred or provided in the ordinary course of business securing the
         performance of contractual, franchise, lease, self-insurance or license
         obligations and not in connection with the
<PAGE>

                                                                             118

         Incurrence of Debt or (B) in respect of customary agreements providing
         for indemnification, adjustment of purchase price after closing, or
         similar obligations, or from Guarantees or letters of credit, surety
         bonds or performance bonds securing any such obligations of the Company
         or any of its Restricted Subsidiaries pursuant to such agreements,
         Incurred in connection with the disposition of any business, assets or
         Restricted Subsidiary of the Company (other than Guarantees of
         Indebtedness Incurred by any Person acquiring all or any portion of
         such business, assets or Restricted Subsidiary of the Company for the
         purpose of financing such acquisition) and in an aggregate principal
         amount not to exceed the gross proceeds actually received by the
         Company or any Restricted Subsidiary in connection with such
         disposition;

                  (x)  Debt consisting of Permitted Interest Rate or
         Currency Protection Agreements;

                 (xi)  Debt not otherwise permitted to be Incurred pursuant to
         clauses (i) through (x) above or clause (xii) below, which, together
         with any other outstanding Debt Incurred pursuant to this clause (xi),
         has an aggregate principal amount not in excess of $50,000,000 at any
         time outstanding; and

                (xii)  Issue Date Purchase Money Debt and Debt under the
         Existing Notes, the New Convertible Notes, the Dollar Notes, the Euro
         Notes and the related indentures and any restricted subsidiary
         Guarantees issued in accordance with such related indentures.

         (c) Notwithstanding any other provision of this Section 1010, the
maximum amount of Debt that the Company or a Restricted Subsidiary may Incur
pursuant to this Section 1010 shall not be deemed to be exceeded due solely to
the result of fluctuations in the exchange rates of currencies.

         (d) For purposes of determining any particular amount of Debt under
this Section 1010, (i) Guarantees, Liens or obligations with respect to letters
of credit supporting Debt otherwise included in the determination of such
particular amount shall not be included and (ii) any Liens
<PAGE>

                                                                             119

granted for the benefit of the Securities pursuant to the provisions referred to
in the first paragraph of Section 1014 shall not be treated as Debt. For
purposes of determining any particular amount of Debt under this Section 1010,
if any such Debt denominated in a different currency is subject to a currency
agreement that constitutes a Permitted Interest Rate or Currency Protection
Agreement with respect to U.S. dollars covering all principal of, premium, if
any, and interest payable on such Debt, the amount of such Debt expressed in
U.S. dollars will be as provided in such currency agreement. For purposes of
determining compliance with this Section 1010, in the event that an item of Debt
meets the criteria of more than one of the types of Debt described in the above
clauses, the Company, in its sole discretion, shall classify such item of Debt
and only be required to include the amount and type of such Debt in one of such
clauses.

         SECTION 1011.  Limitation on Debt of Restricted Subsidiaries.
                        ----------------------------------------------

         The Company shall not permit any Restricted Subsidiary that is not a
Guarantor to Incur any Debt except any and all of the following (each of which
shall be given independent effect):

                  (i)  Restricted Subsidiary Guarantees;

                 (ii)  Debt outstanding on the Measurement Date;

                (iii)  Debt of Restricted Subsidiaries under Credit Facilities
         permitted to be Incurred pursuant to clause (ii) of paragraph (b) of
         Section 1010;

                 (iv)  Purchase Money Debt of Restricted Subsidiaries permitted
         to be Incurred pursuant to clause (iii) of paragraph (b) of Section
         1010;

                  (v)  Debt owed by a Restricted Subsidiary to the Company or a
         Restricted Subsidiary of the Company permitted to be Incurred pursuant
         to clause (vi) of paragraph (b) of Section 1010;

                 (vi)  Debt of Restricted Subsidiaries consisting of Permitted
         Interest Rate or Currency Protection
<PAGE>

                                                                             120

         Agreements permitted to be Incurred pursuant to clause (x) of paragraph
         (b) of Section 1010;

                (vii)  Debt of Restricted Subsidiaries permitted to be Incurred
         under clause (vii) of paragraph (b) of Section 1010 or Issue Date
         Purchase Money Debt permitted to be Incurred under clause (xii) of
         paragraph (b) of Section 1010;

               (viii)  Debt of Restricted Subsidiaries permitted to be Incurred
         under clause (ix) or (xi) of paragraph (b) of Section 1010; and

                 (ix)  Debt which is Incurred to refinance any Debt of a
         Restricted Subsidiary permitted to be Incurred pursuant to clauses (i),
         (ii), (iii), (iv) and (vii) of this paragraph or this clause (ix), in
         an aggregate principal amount (or if issued at a discount, the then-
         Accreted Value) not to exceed the aggregate principal amount (or if
         issued at a discount, the then-Accreted Value) of 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
         Board of Directors 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 applicable Restricted Subsidiary
         Incurred in connection therewith; provided, however, that, in the case
                                           --------  -------
         of any refinancing of Debt Incurred pursuant to clause (i), (ii) or
         (vii) or, if such Debt previously refinanced Debt Incurred pursuant to
         any such clause, this clause (ix), the refinancing Debt by its terms,
         or by the terms of any agreement or instrument pursuant to which such
         Debt is Incurred, (x) does not provide for payments of principal at the
         stated maturity of such Debt or by way of a sinking fund applicable to
         such Debt or by way of any mandatory redemption, defeasance, retirement
         or repurchase of such Debt by the Company or any Restricted Subsidiary
         (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
<PAGE>

                                                                             121

         are required by the terms of the Debt 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 such
         Debt at the option of the holder thereof prior to the stated maturity
         of the Debt being refinanced, other than, in the case of clause (x) or
         (y), any such payment, redemption or other retirement (including
         pursuant to an offer to purchase made by the Company or a Restricted
         Subsidiary) which is conditioned upon the change of control of the
         Company pursuant to provisions substantially similar to those contained
         in Section 1009.

         Notwithstanding any other provision of this Section 1011, the maximum
amount of Debt that a Restricted Subsidiary may Incur pursuant to this Section
1011 shall not be deemed to be exceeded due solely as the result of fluctuations
in the exchange rates of currencies.

         For purposes of determining any particular amount of Debt under this
Section 1011, Guarantees, Liens or obligations with respect to letters of credit
supporting Debt otherwise included in the determination of such particular
amount shall not be included. For purposes of determining compliance with this
Section 1011, in the event that an item of Debt meets the criteria of more than
one of the types of Debt described in the above clauses, the Company, in its
sole discretion, shall classify such item of Debt and only be required to
include the amount and type of such Debt in one of such clauses.

         SECTION 1012.  Limitation on Restricted Payments.
                        ----------------------------------
<PAGE>

                                                                             122

         (a) The Company (i) shall not, and shall not permit any Restricted
Subsidiary to, directly or indirectly, declare or pay any dividend, or make any
distribution, in respect of its Capital Stock or to the holders thereof,
excluding any dividends or distributions which are made solely to the Company or
a Restricted Subsidiary (and, if such Restricted Subsidiary is not a Wholly
Owned Subsidiary, to the other stockholders of such Restricted Subsidiary on a
pro rata basis or on a basis that results in the receipt by the Company or a
Restricted Subsidiary of dividends or distributions of greater value than it
would receive on a pro rata basis) or any dividends or distributions payable
solely in shares of Capital Stock of the Company (other than Disqualified Stock)
or in options, warrants or other rights to acquire Capital Stock of the Company
(other than Disqualified Stock); (ii) shall not, and shall not permit any
Restricted Subsidiary to, purchase, redeem, or otherwise retire or acquire for
value (x) any Capital Stock of the Company or any Restricted Subsidiary of the
Company or (y) any options, warrants or rights to purchase or acquire shares of
Capital Stock of the Company or any Restricted Subsidiary or any securities
convertible or exchangeable into shares of Capital Stock of the Company or any
Restricted Subsidiary, except, in any such case, any such purchase, redemption
or retirement or acquisition for value (A) paid to the Company or a Restricted
Subsidiary (or, in the case of any such purchase, redemption or other retirement
or acquisition for value with respect to a Restricted Subsidiary that is not a
Wholly Owned Subsidiary, to the other stockholders of such Restricted Subsidiary
on a pro rata basis or on a basis that results in the receipt by the Company or
a Restricted Subsidiary of payments of greater value than it would receive on a
pro rata basis) or (B) paid solely in shares of Capital Stock (other than
Disqualified Stock) of the Company; (iii) shall not make, or permit any
Restricted Subsidiary to make, any Investment (other than an Investment in the
Company or a Restricted Subsidiary or a Permitted Investment) in any Person,
including the Designation of any Restricted Subsidiary as an Unrestricted
Subsidiary, or the Revocation of any such Designation, according to Section
1019; (iv) shall not, and shall 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 subordin-
<PAGE>

                                                                             123

ate in right of payment to the Securities (other than any redemption,
defeasance, repurchase, retirement or other acquisition or retirement for value
made in anticipation of satisfying a scheduled maturity, repayment or sinking
fund obligation due within one year thereof); and (v) shall not, and shall not
permit any Restricted Subsidiary to, issue, transfer, convey, sell or otherwise
dispose of Capital Stock of any Restricted Subsidiary to a Person other than the
Company or another Restricted Subsidiary if the result thereof is that such
Restricted Subsidiary shall cease to be a Restricted Subsidiary, in which event
the amount of such "Restricted Payment" shall be the Fair Market Value of the
remaining interest, if any, in such former Restricted Subsidiary held by the
Company and the other Restricted Subsidiaries (each of clauses (i) through (v)
being a "Restricted Payment") if: (1) an Event of Default, or an event that with
the passing of time or the giving of notice, or both, would constitute an Event
of Default, shall have occurred and be continuing, or (2) upon giving effect to
such Restricted Payment, the Company could not Incur at least $1.00 of
additional Debt pursuant to paragraph (a) of Section 1010, or (3) upon giving
effect to such Restricted Payment, the aggregate of all Restricted Payments made
on or after the Measurement Date, including Restricted Payments made pursuant to
clause (A) or (B) of the proviso at the end of this sentence, and Permitted
Investments made on or after the Measurement Date pursuant to clause (i) or (j)
of the definition thereof (the amount of any such Restricted Payment or
Permitted Investment, if made other than in cash, to be based upon Fair Market
Value) exceeds the sum of: (a) 50% of cumulative Consolidated Net Income (or, in
the case that Consolidated Net Income shall be negative, 100% of such negative
amount) since the end of the last full fiscal quarter prior to the Measurement
Date through the last day of the last full fiscal quarter ending at least 45
days prior to the date of such Restricted Payment and (b) plus, in the case of
any Revocation made after the Measurement Date, an amount equal to the lesser of
the portion (proportionate to the Company's equity interest in the Subsidiary
to which such Revocation relates) of the Fair Market Value of the net assets of
such Subsidiary at the time of Revocation and the amount of Investments
previously made (and treated as a Restricted Payment) by the Company or any
Restricted Subsidiary in such Subsidiary; provided, however, that the Company or
                                          --------  -------
a Restricted Subsidiary of the Company
<PAGE>

                                                                             124

may, without regard to the limitations in clause (3) but subject to clauses (1)
and (2), make (A) Restricted Payments in an aggregate amount not to exceed the
sum of $50,000,000 and the aggregate net cash proceeds received after the
Measurement Date (i) as capital contributions to the Company, from the issuance
(other than to a Subsidiary or an employee stock ownership plan or trust
established by the Company or any such Subsidiary for the benefit of their
employees) of Capital Stock (other than Disqualified Stock) of the Company, and
(ii) from the issuance or sale of Debt of the Company or any Restricted
Subsidiary (other than to a Subsidiary, the Company or an employee stock
ownership plan or trust established by the Company or any such Subsidiary for
the benefit of their employees) that after the Measurement Date has been
converted into or exchanged for Capital Stock (other than Disqualified Stock) of
the Company and (B) Investments in Persons engaged in the Telecommunications/IS
Business in an aggregate amount not to exceed the after-tax gain on the sale,
after the Measurement Date, of Special Assets to the extent sold for cash, Cash
Equivalents, Telecommunications/IS Assets or the assumption of Debt of the
Company or any Restricted Subsidiary (other than Debt that is subordinated to
the Securities or any applicable Restricted Subsidiary Guarantee) and release
of the Company and all Restricted Subsidiaries from all liability on the Debt
assumed. The aggregate net cash proceeds referred to in the immediately
preceding clauses (A)(i) and (A)(ii) shall not be utilized to make Restricted
Payments pursuant to such clauses to the extent such proceeds have been utilized
to make Permitted Investments under clause (i) of the definition of "Permitted
Investments."

         (b) Notwithstanding the foregoing limitation, (i) the Company may pay
any dividend on Capital Stock of any class of the Company 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; provided, however, that at the time of such payment of such
            --------  -------
dividend, no other Event of Default shall have occurred and be continuing (or
result therefrom); (ii) the Company may repurchase any shares of its Common
Stock or options to acquire its Common Stock from Persons who were formerly
directors, officers or employees of the Company or any of its Subsidiaries or
other Affiliates in an amount not to exceed $3,000,000 in any 12-month period;
<PAGE>

                                                                             125

(iii) the Company and any Restricted Subsidiary may refinance any Debt otherwise
permitted by clause (viii) of paragraph (b) of Section 1010 or clause (ix) of
Section 1011; (iv) the Company and any Restricted Subsidiary may retire or
repurchase any Capital Stock of the Company or of any Restricted Subsidiary or
any Subordinated Debt of the Company in exchange for, or out of the proceeds of
the substantially concurrent sale (other than to a Subsidiary of the Company or
an employee stock ownership plan or trust established by the Company or any such
Subsidiary for the benefit of their employees) of, Capital Stock (other than
Disqualified Stock) of the Company, provided that the proceeds from any such
                                    --------
exchange or sale of Capital Stock shall be excluded from any calculation
pursuant to clause (A)(i) in the proviso at the end of paragraph (a) above or
pursuant to clause (b) of the definition of "Invested Capital"; and (v) the
Company may pay cash dividends in any amount not in excess of $50,000,000 in any
12-month period in respect of Preferred Stock of the Company (other than
Disqualified Stock). The Restricted Payments described in the foregoing clauses
(i), (ii) and (v) shall be included in the calculation of Restricted Payments;
the Restricted Payments described in clauses (iii) and (iv) shall be excluded in
the calculation of Restricted Payments.

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

         (a) The Company shall not, and shall 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 (other than
pursuant to law or regulation) on the ability of any Restricted Subsidiary (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 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 to the
Company or any other Restricted Subsidiary.

         (b) Notwithstanding the foregoing limitation, the Company may, and may
permit any Restricted Subsidiary to,
<PAGE>

                                                                             126

create or otherwise cause or suffer to exist (i) any encumbrance or restriction
pursuant to any agreement in effect on the Measurement Date, (ii) any customary
(as conclusively determined in good faith by the Chief Financial Officer of the
Company) encumbrance or restriction applicable to a Restricted Subsidiary that
is contained in an agreement or instrument governing or relating to Debt
contained in any Credit Facilities or Purchase Money Debt, provided that such
                                                           --------
encumbrances and restrictions permit the distribution of funds to the Company in
an amount sufficient for the Company to make the timely payment of interest,
premium (if any) and principal (whether at stated maturity, by way of a sinking
fund applicable thereto, by way of any mandatory redemption, defeasance,
retirement or repurchase thereof, including upon the occurrence of designated
events or circumstances or by virtue of acceleration upon an event of default,
or by way of redemption or retirement at the option of the holder of the Debt,
including pursuant to offers to purchase) according to the terms of this
Indenture and the Securities and other Debt that is solely an obligation of the
Company, but provided further that such agreement may nevertheless contain
             ----------------
customary (as so determined) net worth, leverage, invested capital and other
financial covenants, customary (as so determined) covenants regarding the merger
of or sale of all or any substantial part of the assets of the Company or any
Restricted Subsidiary, customary (as so determined) restrictions on transactions
with affiliates and customary (as so determined) subordination provisions
governing Debt owed to the Company or any Restricted Subsidiary, (iii) any
encumbrance or restriction 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, (iv) any
encumbrance or restriction pursuant to an agreement effecting a refinancing of
Debt Incurred pursuant to an agreement referred to in clause (i), (ii) or (iii)
of this paragraph (b), provided, however, that the provisions contained in such
                       --------  -------
agreement relating to such encumbrance or restriction are no more restrictive
(as so determined) in any material respect than the provisions contained in the
agreement the subject thereof, (v) in the case of clause (iii) of paragraph (a)
above, any encumbrance or restriction contained in any security agreement
(including a Capital Lease Obligation) securing Debt of the Company or a
<PAGE>

                                                                             127

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, (vi) in the case of clause (iii) of paragraph (a) above,
customary provisions (A) that restrict the subletting, assignment or transfer of
any Property that is a lease, license, conveyance or similar contract, (B)
contained in asset sale or other asset disposition agreements limiting the
transfer of the Property being sold or disposed of pending the closing of such
sale or disposition or (C) arising or agreed to in the ordinary course of
business, not relating to any Debt, and that do not, individually or in the
aggregate, detract from the value of Property of the Company or any Restricted
Subsidiary in any manner material to the Company or any Restricted Subsidiary,
(vii) any encumbrance or restriction with respect to a Restricted Subsidiary
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 Property of such
Restricted Subsidiary, provided that the consummation of such transaction would
                       --------
not result in a Default or an Event of Default, that such restriction terminates
if such transaction is abandoned and that the consummation or abandonment of
such transaction occurs within one year of the date such agreement was entered
into, and (viii) any encumbrance or restriction pursuant to this Indenture and
the Securities.

         SECTION 1014.  Limitation on Liens.
                        --------------------

         The Company shall not, and shall not permit any Restricted Subsidiary
to, directly or indirectly, Incur or suffer to exist any Lien on or with respect
to any Property now owned or acquired after the Measurement Date to secure any
Debt without making, or causing such Restricted Subsidiary to make, effective
provision for securing the Securities (x) equally and ratably with 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 or a Guarantor which is subordinate in right of
payment to the Securities or the applicable Restricted Subsidiary Guarantee,
prior to such Debt as to such Property for so long as such Debt will be so
secured.
<PAGE>

                                                                             128

     The foregoing restrictions shall not apply to: (i) Liens existing on the
Measurement Date and securing Debt outstanding on the Measurement Date or
Incurred by the Company or a Restricted Subsidiary on or after the Measurement
Date pursuant to any Credit Facility to secure Debt permitted to be Incurred by
the Company or such Restricted Subsidiary pursuant to clause (ii) of paragraph
(b) under Section 1010; (ii) Liens securing Debt in an amount which, together
with the aggregate amount of Debt then outstanding or available under all Credit
Facilities (together with all refinancing Debt then outstanding or available
pursuant to clause (viii) of paragraph (b) of Section 1010 in respect of Debt
previously Incurred under Credit Facilities), 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 the Company's
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 Restricted Subsidiary; provided, however, that any subsequent issue or
                              --------  -------
transfer of Capital Stock or other event that results in any such Restricted
Subsidiary ceasing to be a Restricted Subsidiary or any subsequent transfer of
the Debt secured by any such Lien (except to the Company or a Restricted
Subsidiary) shall be deemed, in each case, to constitute the Incurrence of such
Lien by the issuer thereof; (iv) Liens Incurred by the Company or a Restricted
Subsidiary to secure Purchase Money Debt permitted to be Incurred by the Company
or such Restricted Subsidiary pursuant to clause (iii) of paragraph (b) under
Section 1010, provided that any such Lien may not extend to any Property other
              --------
than the Telecommunications/IS Assets installed, constructed, acquired, leased,
developed or improved with the proceeds of such Purchase Money Debt and any
improvements or accessions thereto (it being understood that all Debt to any
single lender or group of related lenders or outstanding under any single credit
facility, and in any case relating to the same group or collection of
Telecommunications/IS Assets financed thereby, 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 that (a) such Lien attaches to the acquired
                         --------
Property prior to the time of the acquisition of such
<PAGE>

                                                                             129

Property and (b) such Lien does not extend to or cover any other Property; (vi)
Liens to secure Debt Incurred to refinance, in whole or in part, Debt secured by
any Lien referred to in the foregoing clauses (i), (iv) and (v) or this clause
(vi) so long as such Lien does not extend to any other Property (other than
improvements and accessions to the original Property) and the principal amount
of Debt so secured is not increased except as otherwise permitted under clause
(viii) of paragraph (b) of Section 1010 or clause (ix) of Section 1011; (vii)
Liens not otherwise permitted by the foregoing clauses (i) through (vi) securing
Debt in an aggregate amount not to exceed 5% of the Company's Consolidated
Tangible Assets; (viii) Liens granted after the Issue Date pursuant to this
Section 1014 to secure the Securities; and (ix) Permitted Liens.

     SECTION 1015. Limitation on Sale and Leaseback Transactions.
                   ---------------------------------------------

     The Company shall not, and shall not permit any Restricted Subsidiary to,
directly or indirectly, enter into, assume, Guarantee or otherwise become liable
with respect to any Sale and Leaseback Transaction, unless (i) the Company or
such Restricted Subsidiary would be entitled to Incur (a) Debt in an amount
equal to the Attributable Value of the Sale and Leaseback Transaction pursuant
to Section 1010 and (b) a Lien pursuant to Section 1014, equal in amount to the
Attributable Value of the Sale and Leaseback Transaction, without also securing
the Securities, and (ii) the Sale and Leaseback Transaction is treated as an
Asset Disposition and all of the conditions of Section 1016 (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 as Net Available
Proceeds for purposes of such Section 1015.
<PAGE>

                                                                             130

     SECTION 1016.  Limitation on Asset Dispositions.
                    ---------------------------------

     The Company shall not, and shall not permit any Restricted Subsidiary to,
make any Asset Disposition 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 Property sold or disposed of as determined by
the Board of Directors in good faith and evidenced by a Board Resolution filed
with the Trustee; and (ii) at least 75% of the consideration for such
disposition consists of cash or Cash Equivalents or the assumption of Debt of
the Company or any Restricted Subsidiary (other than Debt that is subordinated
to the Securities or any applicable Restricted Subsidiary Guarantee) and release
of the Company and all Restricted Subsidiaries from all liability on the Debt
assumed (or if less than 75%, the remainder of such consideration consists of
Telecommunications/IS Assets); provided, however, that, to the extent such
                               --------  -------
disposition involves Special Assets, all or any portion of the consideration
may, at the Company's election, consist of Property other than cash, Cash
Equivalents, the assumption of Debt or Telecommunications/IS Assets.

     The Net Available Proceeds (or any portion thereof) from Asset Dispositions
may be applied by the Company or a Restricted Subsidiary, to the extent the
Company or such Restricted Subsidiary elects (or is required by the terms of any
Debt): (1) to the permanent repayment or reduction of Debt then outstanding
under any Credit Facility, to the extent such Credit Facility would require such
application or prohibit payments pursuant to the Offer to Purchase described in
the following paragraph (other than Debt owed to the Company or any Affiliate of
the Company); or (2) to reinvest in Telecommunications/IS Assets (including by
means of an Investment in Telecommunications/IS Assets by a Restricted
Subsidiary with Net Available Proceeds received by the Company or another
Restricted Subsidiary).

     Any Net Available Proceeds from an Asset Disposition not applied in
accordance with the preceding paragraph within 360 days (or, in the case of a
disposition of Special Assets identified in clause (a) of the definition thereof
in which the Net Available
<PAGE>

                                                                             131

Proceeds exceed $500,000,000, 540 days) from the date of the receipt of such Net
Available Proceeds shall constitute "Excess Proceeds." When the aggregate amount
of Excess Proceeds exceeds $10,000,000, the Company will be required to make an
Offer to Purchase with such Excess Proceeds on a pro rata basis according to
principal amount (or, in the case of Debt issued at a discount, the then-
Accreted Value) for (x) Outstanding Securities at a price in cash equal to 100%
of the principal amount of the Securities on the purchase date plus accrued and
unpaid interest (if any) thereon (subject to the right of Holders of record on
the relevant record date to receive interest due on the relevant interest
payment date) and (y) any other Debt of the Company or any Guarantor that is
pari passu with the Securities, or any Debt of a Restricted Subsidiary that is
---- -----
not a Guarantor, at a price no greater than 100% of the principal amount thereof
plus accrued and unpaid interest (if any) to the purchase date (or 100% of the
then-Accreted Value plus accrued and unpaid interest (if any) to the purchase
date in the case of original issue discount Debt), to the extent, in the case of
this clause (y), required under the terms thereof (other than Debt owed to the
Company or any Affiliate of the Company). To the extent there are any remaining
Excess Proceeds following the completion of the Offer to Purchase, the Company
shall apply such Excess Proceeds to the repayment of other Debt of the Company
or any Restricted Subsidiary, to the extent permitted or required under the
terms thereof. Any other remaining Excess Proceeds may be applied to any use as
determined by the Company which is not otherwise prohibited by this Indenture,
and the amount of Excess Proceeds shall be reset to zero.

     The Company and the Trustee shall perform their respective obligations for
the Offer to Purchase as specified in the Offer. Prior to the Purchase Date, the
Company shall (i) accept for payment Securities or portions thereof tendered
pursuant to the Offer, (ii) irrevocably 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 (provided that such deposit may be
made no later than 10:00 A.M. New York City time on the Purchase Date if the
Company elects) and (iii) deliver or cause to be delivered to the Trustee all
Securities so accepted together with an Officers' Certificate stating the
Securities or
<PAGE>

                                                                             132

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. In the event that the
aggregate Purchase Price is less than the amount delivered by the Company to the
Trustee or the Paying Agent, the Trustee or the Paying Agent, as the case may
be, shall deliver the excess to the Company immediately after the Purchase Date.

     Not later than the date upon which written notice of an Offer to Purchase
is delivered to the Trustee, the Company shall deliver to the Trustee an
Officers' Certificate as to (i) the amount of the Offer, (ii) the allocation of
the Net Available Proceeds from the Asset Disposition pursuant to which such
Offer is being made and (iii) the compliance of such allocation with the
provisions of this Section 1016.

     In the event that the Company makes an Offer to Purchase the Securities,
the Company shall 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. To the extent that the provisions of any securities laws or
regulations conflict with provisions of this Section, the Company shall comply
with the applicable securities laws and regulations and shall not be deemed to
have breached its obligations under this Section by virtue thereof.

     SECTION 1017. Limitation on Issuance and Sales of Capital Stock of
                   ----------------------------------------------------
Restricted Subsidiaries.
------------------------
<PAGE>

                                                                             133

     The Company shall not, and shall not permit any Restricted Subsidiary to,
issue, transfer, convey, sell or otherwise dispose of any shares of Capital
Stock of a Restricted Subsidiary or securities convertible or exchangeable into,
or options, warrants, rights or any other interest with respect to, Capital
Stock of a Restricted Subsidiary to any Person other than the Company or a
Restricted Subsidiary except (i) a sale of all of the Capital Stock of such
Restricted Subsidiary owned by the Company and any Restricted Subsidiary that
complies with the provisions of Section 1016 to the extent such provisions
apply, (ii) in a transaction that results in such Restricted Subsidiary becoming
a Joint Venture, provided (x) such transaction complies with the provisions of
                 --------
Section 1016 to the extent such provisions apply and (y) the remaining interest
of the Company or any other Restricted Subsidiary in such Joint Venture would
have been permitted as a new Restricted Payment or Permitted Investment under
the provisions of Section 1012, (iii) the issuance, transfer, conveyance, sale
or other disposition of shares of such Restricted Subsidiary so long as after
giving effect to such transaction such Restricted Subsidiary remains a
Restricted Subsidiary and such transaction complies with the provisions of
Section 1016 to the extent such provisions apply, (iv) the transfer, conveyance,
sale or other disposition of shares required by applicable law or regulation,
(v) if required, the issuance, transfer, conveyance, sale or other disposition
of directors' qualifying shares, (vi) Disqualified Stock issued in exchange
for, or upon conversion of, or the proceeds of the issuance of which are used to
refinance, 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 or refinanced, (vii) in a
transaction where the Company or a Restricted Subsidiary acquires at the same
time not less than its Proportionate Interest in such issuance of Capital Stock,
(viii) Capital Stock issued and outstanding on the Measurement Date, (ix)
Capital Stock of a Restricted Subsidiary issued and outstanding prior to the
time that such Person becomes a Restricted Subsidiary so long as such Capital
Stock was not issued in contemplation of such Person's becoming a Restricted
Subsidiary or otherwise being
<PAGE>

                                                                             134

acquired by the Company and (x) an issuance of Preferred Stock of a Restricted
Subsidiary (other than Preferred Stock convertible or exchangeable into Common
Stock of any Restricted Subsidiary) otherwise permitted by this Indenture. In
the event of (a) the consummation of a transaction referred to in any of the
foregoing clauses that results in a Guarantor no longer being a Restricted
Subsidiary and (b) the execution and delivery of a supplemental indenture
providing for such release in form satisfactory to the Trustee, any such
Guarantor shall be released from all its obligations under its Restricted
Subsidiary Guarantee.

     SECTION 1018.  Transactions with Affiliates.
                    -----------------------------
<PAGE>

                                                                             135

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, sell, lease, transfer, or otherwise
dispose of any of its Property to, or purchase any Property from, or enter into
any contract, agreement, understanding, loan, advance, Guarantee or transaction
(including the rendering of services) with or for the benefit of, any Affiliate
(each of the foregoing, an "Affiliate Transaction"), unless (a) such Affiliate
Transaction or series of Affiliate Transactions is (i) in the best interest of
the Company or such Restricted Subsidiary and (ii) on terms that are no less
favorable to the Company or such Restricted Subsidiary than those that would
have been obtained in a comparable arm's-length transaction by the Company or
such Restricted Subsidiary with a Person that is not an Affiliate (or, in the
event that there are no comparable transactions involving Persons who are not
Affiliates of the Company or the relevant Restricted Subsidiary to apply for
comparative purposes, is otherwise on terms that, taken as a whole, the Company
has determined to be fair to the Company or the relevant Restricted Subsidiary)
and (b) the Company delivers to the Trustee (i) with respect to any Affiliate
Transaction or series of Affiliate Transactions involving aggregate payments in
excess of $10,000,000 but less than $15,000,000, a certificate of the chief
executive, operating or financial officer of the Company evidencing such
officer's determina tion that such Affiliate Transaction or series of Affiliate
Transactions complies with clause (a) above and (ii) with respect to any
Affiliate Transaction or series of Affiliate Transactions involving aggregate
payments equal to or in excess of $15,000,000, a Board Resolution certifying
that such Affiliate Transaction or series of Affiliate Transactions complies
with clause (a) above and that such Affiliate Transaction or series of Affiliate
Transactions has been approved by the Board of Directors, including a majority
of the disinterested members of the Board of Directors, provided that, in the
                                                        --------
event that there shall not be at least two disinterested members of the Board of
Directors with respect to the Affiliate Transaction, the Company shall, in
addition to such Board Resolution, file with the Trustee a written opinion from
an investment banking firm of national standing in the United States which, in
the good faith judgment of the Board of Directors, is independent with respect
to the Company and its Affiliates and qualified to perform such task, which
opinion
<PAGE>

                                                                             136

shall be to the effect that the consideration to be paid or received in
connection with such Affiliate Transaction is fair, from a financial point of
view, to the Company or such Restricted Subsidiary.

     Notwithstanding the foregoing, the following shall not be deemed Affiliate
Transactions: (i) any employment agreement entered into by the Company or any of
its Restricted Subsidiaries in the ordinary course of business and consistent
with industry practice; (ii) any agreement or arrangement with respect to the
compensation of a director or officer of the Company or any Restricted
Subsidiary approved by a majority of the disinterested members of the Board of
Directors and consistent with industry practice; (iii) transactions between or
among the Company and its Restricted Subsidiaries, provided that no more than 5%
                                                   --------
of the Voting Stock (on a fully diluted basis) of any such Restricted Subsidiary
is owned by an Affiliate of the Company (other than a Restricted Subsidiary);
(iv) Restricted Payments and Permitted Investments permitted by Section 1012
(other than Investments in Affiliates that are not the Company or Restricted
Subsidiaries); (v) transactions pursuant to the terms of any agreement or
arrangement as in effect on the Measurement Date; and (vi) transactions with
respect to wireline or wireless transmission capacity, the lease or sharing or
other use of cable or fiber optic lines, equipment, rights-of-way or other
access rights, between the Company (or any Restricted Subsidiary) and any other
Person, provided that, in the case of this clause (vi), such transaction
        --------
complies with clause (a) in the immediately preceding paragraph.

     SECTION 1019. Limitation on Designations of Unrestricted Subsidiaries.
                   -------------------------------------------------------

     The Company shall not designate any Subsidiary of the Company (other than a
newly created Subsidiary in which no Investment has previously been made) as an
"Unrestricted Subsidiary" under this Indenture (a "Designation") unless:

          (a)  no Default or Event of Default shall have occurred and be
     continuing at the time of or after giving effect to such Designation;
<PAGE>

                                                                             137

          (b)  immediately after giving effect to such Designation, the
         Company would be able to Incur $1.00 of Debt under paragraph (a) of
         Section 1010; and

          (c)  the Company would not be prohibited under any provision of this
     Indenture from making an Investment at the time of Designation (assuming
     the effectiveness of such Designation) in an amount (the "Designation
     Amount") equal to the portion (proportionate to the Company's equity
     interest in such Restricted Subsidiary) of the Fair Market Value of the net
     assets of such Restricted Subsidiary on such date.

     In the event of any such Designation, the Company shall be deemed to have
made an Investment constituting a Restricted Payment pursuant to Section 1012
for all purposes of this Indenture in the Designation Amount; provided, however,
                                                              --------  -------
that, upon a Revocation of any such Designation of a Subsidiary, the Company
shall be deemed to continue to have a permanent "Investment" in an Unrestricted
Subsidiary of an amount (if positive) equal to (i) the Company's "Investment" in
such Subsidiary at the time of such Revocation less (ii) the portion
(proportionate to the Company's equity interest in such Subsidiary) of the Fair
Market Value of the net assets of such Subsidiary at the time of such
Revocation. At the time of any Designation of any Subsidiary as an Unrestricted
Subsidiary, such Subsi diary shall not own any Capital Stock of the Company or
any Restricted Subsidiary. In addition, neither the Company nor any Restricted
Subsidiary shall at any time (x) provide credit support for, or a Guarantee of,
any Debt of any Unrestricted Subsidiary (including any undertaking, agreement
or instrument evidencing such Debt); provided that the Company or a Restricted
                                     --------
Subsidiary may pledge Capital Stock or Debt of any Unrestricted Subsidiary on a
nonrecourse basis such that the pledgee has no claim whatsoever against the
Company other than to obtain such pledged Capital Stock or Debt, (y) be directly
or indirectly liable for any Debt of any Unrestricted Subsidiary or (z) be
directly or indirectly liable for any Debt which provides that the holder
thereof may (upon notice, lapse of time or both) declare a default thereon or
cause the payment thereof to be accelerated or payable prior to its final
scheduled maturity upon the occurrence of a default with respect to any Debt,
Lien or other obligation of any Unrestricted Subsidiary
<PAGE>

                                                                             138

(including any right to take enforcement action against such Unrestricted
Subsidiary), except in the case of clause (x) or (y) to the extent permitted
under Sections 1012 and 1018.

     Unless Designated as an Unrestricted Subsidiary, any Person that becomes a
Subsidiary of the Company will be classified as a Restricted Subsidiary;
provided, however, that such Subsidiary shall not be designated as a Restricted
--------  -------
Subsidiary and shall be automatically classified as an Unrestricted Subsidiary
if either of the requirements set forth in clauses (a) and (b) of the
immediately following paragraph will not be satisfied immediately following such
classification. Except as provided in the first sentence of this Section 1019,
no Restricted Subsidiary may be redesig nated as an Unrestricted Subsidiary.

     A Designation may be revoked (a "Revocation") by a Board Resolution
delivered to the Trustee, provided that the Company will not make any Revocation
                          --------
unless:

          (a)  no Default or Event of Default shall have occurred and be
     continuing at the time of and after giving effect to such Revocation; and

          (b)  all Liens and Debt of such Unrestricted Subsidiary outstanding
     immediately following such Revocation would, if Incurred at such time, have
     been permitted to be Incurred at such time for all purposes of this
     Indenture.

     All Designations and Revocations must be evidenced by Board Resolutions
delivered to the Trustee (i) certifying compliance with the foregoing provisions
and (ii) giving the effective date of such Designation or Revocation, such
delivery to the Trustee to occur within 45 days after the end of the fiscal
quarter of the Company in which such Designation or Revocation is made (or, in
the case of a Designation or Revocation made during the last fiscal quarter of
the Company's fiscal year, within 90 days after the end of such fiscal year).
Upon Designation of a Restricted Subsidiary as an Unrestricted Subsidiary in
compliance with this Section 1019, such Restricted Subsidiary shall, by delivery
of a supplemental indenture providing for such release in form satisfactory to
the
<PAGE>

                                                                             139

Trustee, be released from any Restricted Subsidiary Guarantee previously
made by such Subsidiary.

                                ARTICLE ELEVEN

                           REDEMPTION OF SECURITIES

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

     The Securities will be subject to redemption at the option of the Company,
in whole or in part, at any time or from time to time, upon not less than 30 nor
more than 60 days' prior notice, on the terms and at the redemption prices
(expressed as percentages of principal amount) set forth in the second and third
paragraphs on the reverse of the form of Security, plus accrued and unpaid
interest thereon (if any) to the Redemption Date (subject to the right of
Holders of record on the relevant record date to receive interest due on the
relevant interest payment date).

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

     This Article shall govern any redemption of the Securities pursuant to
Section 1101.

     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 a Board Resolution. The Company shall, at least 60
days prior to the Redemption Date fixed by the Company (unless a shorter notice
shall be satisfactory to the Trustee), notify the Trustee of such Redemption
Date and of the principal amount of Securities to be redeemed and shall deliver
to the Trustee such documentation and records as shall enable the Trustee to
select the Securities to be redeemed pursuant to Section 1104. Such notice shall
be accompanied by an Officers' Certificate and an Opinion of Counsel from the
Company to the effect that such redemption will comply with the conditions
herein.
<PAGE>

                                                                             140

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

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

     The Trustee shall promptly notify the Company 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 redemption of Securities shall relate, in the case of
any Security redeemed or to be redeemed only in part, to the portion of the
principal amount of such Security which has been or is to be redeemed.

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

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

     Each notice of redemption shall state:

     (1)  the Redemption Date,

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

                                                                             141

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

     (4)  in case any Security is to be redeemed in part only, that on and after
the Redemption Date, upon surrender of such Security, the Holder will receive,
without charge, a new Security or Securities of authorized denominations for the
principal amount thereof remaining unredeemed,

     (5)  that on the Redemption Date the Redemption Price (and unpaid and
accrued interest, if any, to the Redemption Date payable as provided in Section
1107) will become due and payable upon each such Security, or the portion
thereof, to be redeemed, and that, unless the Company defaults in making such
redemption payment or the Trustee or the Paying Agent is prohibited from making
such payment, interest thereon will cease to accrue on and after said date, and

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

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

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

     On or prior to any Redemption Date (and if on any Redemption Date, before
10:00 A.M. New York City time, on such date), the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 1003) an amount of
money sufficient to pay the Redemption Price of, and unpaid and accrued interest
(subject to the right of Holders of record on the relevant record date to
receive interest due on the relevant interest payment date) on, all the
Securities which are to be redeemed on that date.
<PAGE>

                                                                             142

         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 (together with unpaid and accrued interest,
if any, to the Redemption Date), and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest or the Trustee or the Paying Agent shall be prohibited from making such
payment) 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 unpaid and accrued
interest, if any, to the Redemption Date; provided, however, that installments
                                          --------  -------
of interest whose Stated Maturity is on or prior to the Redemption Date shall be
payable to the Holders of such 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 borne by the
Securities.

         SECTION 1108.  Securities Redeemed in Part.
                        ----------------------------

         Any Security which is to be redeemed only in part shall be surrendered
at the office or agency of the Company main tained for such purpose pursuant to
Section 1002 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company and
the Trustee duly executed by, the Holder thereof or such Holder's attorney duly
authorized in writing), and the Company shall execute, and the Trustee shall
authenticate and deliver to the Holder of such Security without service charge,
a new Security or Securities, of any authorized denomination as requested by
such Holder, in aggregate principal amount equal to and in exchange for the
unredeemed portion of the principal of the Security so surrendered.
<PAGE>

                                                                             143

                                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, with
respect to the Securities, elect to have either Section 1202 or Section 1203 be
applied to all Outstanding Securities upon compliance with the conditions set
forth below in this Article Twelve.
<PAGE>

                                                                             144

         SECTION 1202.  Defeasance and Discharge.
                        -------------------------

         Upon the Company's exercise under Section 1201 of the option applicable
to this Section 1202, the Company shall be deemed to have been discharged from
its obligations with respect to all Outstanding Securities on the date the
conditions set forth in Section 1204 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, which shall thereafter be deemed to be "Outstanding" only for the
purposes of Section 1205 and the other Sections of this Indenture referred to in
clauses (A) and (B) below, 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 Company's obligations with
respect to such Securities under Sections 304, 305, 306, 1002 and 1003 and the
Company's rights under Section 1101, (B) rights of Holders to receive payment of
principal of, premium, if any, and interest on such Securities (but not the
Purchase Price referred to under Section 1009 or 1016) and any rights of the
Holders with respect to such amounts, (C) the rights, obligations and immunities
of the Trustee under the Indenture 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 with respect to the Securities. If the Company exercises its option under
this Section 1202, each Guarantor, if any, shall be released from all its
obligations under its Restricted Subsidiary Guarantee.
<PAGE>

                                                                             145

         SECTION 1203.  Covenant Defeasance.
                        --------------------

         Upon the Company's exercise under Section 1201 of the option applicable
to this Section 1203, the Company shall be released from its obligations under
any covenant contained in Sections 801(3), (4) and (5), in Sections 803, 1005,
1006 and 1007 and Sections 1009 through 1019 and from the operation of Sections
501(6), (7), (8), (9) and (10) (but, in the case of Sections 501(9) and (10),
with respect only to Significant Subsidiaries), with respect to the Outstanding
Securities on and after the date the conditions set forth below are satisfied
(hereinafter, "covenant defeasance"), and the Securities shall thereafter be
deemed not to be "Outstanding" for the purposes of any direction, waiver,
consent, declaration or other Act of Holders (and the consequences of any
thereof) in connection with such provisions, but shall continue to be deemed
"Outstanding" for all other purposes hereunder. For this purpose, such covenant
defeasance means that, with respect to the Outstanding Securities, 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 provision, whether directly or
indirectly, by reason of any reference elsewhere herein to any such provision or
by reason of any reference in any such provision to any other provision herein
or in any other document and such omission to comply shall not constitute a
Default or an Event of Default under Section 501(3), (4), (5), (6), (7), (8),
(9) or (10) (but, in the case of Section 501(9) or (10), with respect only to
Significant Subsidiaries) but, except as specified above, the remainder of this
Indenture and such Securities shall be unaffected thereby. If the Company
exercises its option under this Section 1203, each Guarantor, if any, shall be
released from all its obligations under its Restricted Subsidiary Guarantee.

         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:
<PAGE>

                                                                             146

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

                  (2) No Default or Event of Default with respect to the
         Securities shall have occurred and be continuing on the date of such
         deposit or, insofar as paragraphs (9) and (10) of Section 501 are
         concerned with respect to the Company, at any time during the period
         ending on the 123rd day after the date of such deposit (it being
         understood that this condition shall not be deemed satisfied until the
         expiration of such period).

                  (3) Such defeasance or covenant defeasance shall not result in
         a breach or violation of, or constitute a
<PAGE>

                                                                             147

         default under, this Indenture or any other agreement or instrument to
         which the Company is a party or by which it is bound.

                  (4) In the case of an election under Section 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 defeasance and will be subject to federal income tax on
         the same amounts, in the same manner and at the same times as would
         have been the case if such defeasance had not occurred.

                  (5) In the case of an election under Section 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 covenant defeasance and will be subject to federal income tax on
         the same amounts, in the same manner and at the same times as would
         have been the case if such covenant defeasance had not occurred.

                  (6) The Company shall have delivered to the Trustee an
         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.

                  (7) The Company shall have delivered to the Trustee an Opinion
         of Counsel acceptable to the Trustee to the effect that such defeasance
         will not result in the trust relating thereto or the Trustee being
         subject to regulation under the Investment Company Act of 1940.
<PAGE>

                                                                             148

                  (8) Money denominated in currency other than euros and
         Government Securities deposited pursuant to this Section 1204 shall be
         subject in their entirety (including principal, interest and premium,
         if any) to a customary currency agreement that is of a duration not
         less than the defeasance period that fixes the exchange rate of such
         money or Government Securities into euros, and that constitutes a
         Permitted Interest Rate or Currency Protection Agreement for the
         benefit of the Trustee. The amount of such money and Government
         Securities expressed in euros will be as provided in such currency
         agreement. The counterparty to such currency agreement shall be a
         commercial bank organized in the United States having capital and
         surplus in excess of $500 million or a commercial bank organized under
         the laws of any country that is a member of the OECD having total
         assets in excess of $500 million (or its foreign currency equivalent at
         the time). Such counterparty may obtain from the Company an Opinion of
         Counsel to the effect that such currency agreement has been duly
         authorized and entered into by the Company.

         SECTION 1205.  Deposited Money and Government Securities to Be Held in
                        -------------------------------------------------------
Trust; Other Miscellaneous Provisions.
-------------------------------------

         Subject to the provisions of the last paragraph of Section 1003, all
money and Government Securities (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
Outstanding 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, premium, if any, and interest, but such money need not be segregated
from other funds except to the extent required by law or to the extent the
Company acts as its own Paying Agent.
<PAGE>

                                                                             149

         The Company shall pay and indemnify the Trustee and (if applicable) its
officers, directors, employees and agents against any tax, fee or other charge
imposed on or assessed against the Government Securities 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 Government Securities held by it as provided in Section
1204 which, in the opinion of a nationally recognized firm of independent public
accountants 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, as
applicable, in accordance with this Article Twelve.

         SECTION 1206.  Reinstatement.
                        --------------

         If the Trustee or any Paying Agent is unable to apply any money in
accordance with Section 401 or 1205 by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, then the Company's and any Guarantor's obligations under this
Indenture and the Securities shall be revived and reinstated as though no
deposit had occurred pursuant to Section 401, 1202 or 1203, as the case may be,
until such time as the Trustee or Paying Agent is permitted to apply all such
money in accordance therewith; provided, however, that if the Company or any
                               --------  -------
Guarantor makes any payment of principal of, premium, if any, or interest on any
Security following the reinstatement of its obligations, the Company or such
Guarantor shall be subrogated to the rights of the Holders of such Securities to
receive such payment from the money held by the Trustee or Paying Agent.
<PAGE>

                                                                             150

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

                                            LEVEL 3 COMMUNICATIONS, INC.

                                                 By: /s/ Thomas C. Stortz
                                                    ---------------------------
                                                    Name: Thomas C. Stortz
                                                    Title: Group Vice President,
                                                           General Counsel and
                                                           Secretary

Attest: /s/ Neil J. Eckstein
       --------------------------
       Name: Neil J. Eckstein
       Title: Assitant Secretary

                                            THE BANK OF NEW YORK, as Trustee

                                                 By: /s/ Van K. Brown
                                                    --------------------------
                                                    Name: Van K. Brown
                                                    Title: Assistant Vice
                                                           President

Attest: /s/ Remo J. Reale
       --------------------------
       Name: Remo J. Reale
       Title: Vice President

<PAGE>

                                   EXHIBIT A

                           Form of Face of Security
                           ------------------------

     [If a Global Security, then insert:]  THIS SECURITY IS A GLOBAL SECURITY
WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN
THE NAME OF A DEPOSITORY OR A NOMINEE OF A DEPOSITORY OR A SUCCESSOR DEPOSITORY.
THIS SECURITY IS NOT EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A
PERSON OTHER THAN THE DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS SECURITY
(OTHER THAN A TRANSFER OF THIS SECURITY AS A WHOLE BY THE DEPOSITORY TO A
NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR
ANOTHER NOMINEE OF THE DEPOSITORY) MAY BE REGISTERED EXCEPT IN THE LIMITED
CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

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

                          [Private Placement Legend]

     THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT").  THE HOLDER HEREOF, BY PURCHASING THIS SECURITY,
AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE RESOLD,
PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE SECOND ANNIVERSARY OF THE
ISSUANCE HEREOF (OR A 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 SECURITY IS ELIGIBLE FOR
<PAGE>

                                      A-2

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 THE RESALE, PLEDGE OR
OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (AS INDICATED BY THE BOX
CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS
SECURITY), (3) IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER
THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE
CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY), PROVIDED THAT, IF SUCH
TRANSFER IS BEING EFFECTED BY CERTAIN TRANSFERORS SPECIFIED IN THE INDENTURE (AS
DEFINED BELOW) PRIOR TO THE DATE THAT IS 40 DAYS FOLLOWING THE ISSUE DATE, A
CERTIFICATE THE FORM OF WHICH MAY BE OBTAINED FROM THE COMPANY OR THE TRUSTEE IS
DELIVERED BY THE TRANSFEREE TO THE COMPANY AND THE TRUSTEE, (4) TO AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE
TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY) THAT
IS ACQUIRING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION, AND
A CERTIFICATE THE FORM OF WHICH MAY BE OBTAINED FROM THE COMPANY OR THE TRUSTEE
IS DELIVERED BY THE TRANSFEREE TO THE COMPANY AND THE TRUSTEE (PROVIDED THAT
CERTAIN TRANSFERORS SPECIFIED IN THE INDENTURE MAY NOT TRANSFER THIS SECURITY
PURSUANT TO THIS CLAUSE (4) PRIOR TO THE DATE THAT IS 40 DAYS FOLLOWING THE
ISSUE DATE), (5) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES
ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT, OR (6)
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. AN INSTITUTIONAL ACCREDITED INVESTOR HOLDING THIS SECURITY AGREES
IT WILL FURNISH TO THE COMPANY AND THE TRUSTEE SUCH CERTIFICATES AND OTHER
INFORMATION AS THEY MAY REASONABLY REQUIRE TO CONFIRM THAT ANY TRANSFER BY IT OF
THIS SECURITY COMPLIES WITH THE FOREGOING RESTRICTIONS. THE HOLDER HEREOF, BY
PURCHASING THIS SECURITY, REPRESENTS AND AGREES FOR THE BENEFIT OF THE COMPANY
THAT IT IS (1) A QUALIFIED INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A
OR (2) AN INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE
501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT AND THAT IT IS
<PAGE>

                                      A-3

HOLDING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION OR (3) 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 Physical Security, then insert:]  IN CONNECTION WITH ANY TRANSFER, THE
HOLDER WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND
OTHER INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT
THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.
<PAGE>

                                      A-4

                         LEVEL 3 COMMUNICATIONS, INC.

                       111/4% Senior Euro Note Due 2010
                                                            CUSIP No.
No.                                             [up to] (Euro)

     Level 3 Communications, Inc., a Delaware corporation (herein called the
"Company", which term includes any successor Person under the Indenture
hereinafter referred to), for value received, hereby promises to pay to
_____________, or registered assigns, the principal sum of [if a Global
Security, then insert:  up to] _________ Dollars [if a Global Security, then
insert:  (the outstanding principal amount of which shall be reflected in the
attached Schedule of Increases or Decreases in Global Security and the records
of the Trustee which, taken together with the outstanding principal amounts of
all other Outstanding Securities, shall not exceed (Euro) 300,000,000 in the
aggregate at any time)] on March 15, 2010, at the office or agency of the
Company referred to below, and to pay interest thereon, in cash in arrears
semiannually on March 15 and September 15 in each year, commencing on September
15, 2000, accruing from February 29, 2000 or from the most recent Interest
Payment Date to which interest has been paid or duly provided for, at the rate
of 111/4% per annum, until the principal hereof is paid or duly provided for.
The Company shall pay interest on overdue principal at the rate borne by the
Securities, and it shall pay interest on overdue installments of interest at the
same rate to the extent lawful.

[Delete this paragraph if an Exchange Security (other than a Private Exchange
Security).]  The Holder of this Security is entitled to the benefits of a Euro
Registration Agreement, dated as of February 24, 2000, between the Company and
the Purchasers named therein (the "Registration Agreement").  Capitalized terms
used in this paragraph but not defined herein have the meanings assigned to them
in the Registration Agreement.  In the event that (i) neither the Exchange Offer
Registration Statement nor the Shelf Registration Statement has been filed with
the Commission on or prior to the 90th day following the date of the original
issuance of the Securities, (ii) neither the Exchange Offer Registration
Statement nor the Shelf Registration Statement has been declared effective on or
prior to the 150th day
<PAGE>

                                      A-5

following the date of the original issuance of the Securities, (iii) neither the
Registered Exchange Offer has been consummated nor the Shelf Registration
Statement has been declared effective on or prior to the 180th day following the
date of the original issuance of the Securities, or (iv) after the Shelf
Registration Statement has been declared effective, such Registration Statement
thereafter ceases to be effective or usable in connection with resales of the
Securities at any time that the Company is obligated to maintain the
effectiveness thereof pursuant to the Registration Agreement (each such event
referred to in clauses (i) through (iv) above being referred to herein as a
"Registration Default"), interest (the "Special Interest") shall accrue (in
addition to stated interest on the Securities) from and including the date on
which the first such Registration Default shall occur to but excluding the date
on which all Registration Defaults have been cured, at a rate per annum equal to
0.50% of the principal amount of the Securities; provided, however, that such
                                                 --------  -------
rate per annum shall increase by 0.25% per annum from and including the 91st day
after the first such Registration Default (and each successive 91st day
thereafter) unless and until all Registration Defaults have been cured; provided
                                                                        --------
further, however, that in no event shall the Special Interest accrue at a rate
-------  -------
in excess of 1.00% per annum. Accrued Special Interest, if any, shall be paid in
cash in arrears semiannually on March 15 and September 15 in each year; and the
amount of accrued Special Interest shall be determined on the basis of the
number of days actually elapsed. Any accrued and unpaid interest (including
Special Interest) on this Security upon the issuance of an Exchange Security in
exchange for this Security shall cease to be payable to the Holder hereof but
such accrued and unpaid interest (including Special 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 the March 1 or September 1 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date.  Any such
<PAGE>

                                      A-6

interest not so punctually paid or duly provided for shall forthwith cease to be
payable to the Holder on such Regular Record Date, and such defaulted interest,
and (to the extent lawful) interest on such defaulted interest at the rate borne
by the Securities, may 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 may be paid at any time in
any other lawful manner, all as more fully provided in said Indenture.   Payment
of the principal of (and premium, if any) and interest on this Security will be
made at the office or agency of the Company maintained for that purpose in The
City of New York, or at such other office or agency of the Company as may be
maintained for such purpose, in euros or such coin or currency of the European
Union as at the time of payment is legal tender for payment of public and
private debts; provided, however, that payment of interest may be made at the
               --------  -------
option of the Company by check mailed to the address of the Person entitled
thereto as such address shall appear on the Security Register.

     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.
<PAGE>

                                      A-7

     Unless the certificate of authentication hereon has been duly 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 under its corporate seal.

Dated:_______________                              LEVEL 3 COMMUNICATIONS, INC.

                                                   By:
                                                      __________________________
                                                        Authorized Signatory

Attest: _____________

<PAGE>

                                      A-8

                          Form of Reverse of Security
                          ---------------------------

     This Security is one of a duly authorized issue of securities of the
Company designated as its 11 1/4% Senior Euro Notes Due 2010 (herein called the
"Securities"), limited (except as otherwise provided in the Indenture referred
to below) in aggregate principal amount to (Euro) 300,000,000, which may be
issued under an indenture (herein called the "Indenture") dated as of February
29, 2000 between the Company and The Bank of New York, as trustee (herein called
the "Trustee", which term includes any successor trustee under the Indenture),
to which Indenture and all indentures supplemental thereto reference is hereby
made for a statement of the respective rights, limitations of rights, duties,
obligations and immunities thereunder of the Company, the Trustee and the
Holders of the Securities, and of the terms upon which the Securities are, and
are to be, authenticated and delivered.

     The Securities are subject to redemption at the option of the Company, in
whole or in part, at any time or from time to time on or after March 15, 2005,
upon not less than 30 nor more than 60 days' prior notice, at the redemption
prices (expressed as percentages of principal amount) set forth below, plus
accrued and unpaid interest thereon (if any) to the redemption date (subject to
the right of Holders of record on the relevant record date to receive interest
due on the relevant interest payment date), if redeemed during the twelve months
beginning March 15 of the years indicated below:

     Year                                               Redemption Price
     ----                                               ----------------

     2005.....................................................  105.625%
     2006.....................................................  103.750%
     2007.....................................................  101.875%
     2008 and thereafter......................................  100.000%

     In addition, at any time or from time to time prior to March 15, 2003, the
Company may redeem up to 35% of the original aggregate principal amount of the
Securities at a
<PAGE>

                                      A-9

redemption price equal to 111.25% of the principal amount of the Securities so
redeemed, plus accrued and unpaid interest thereon (if any) to the redemption
date (subject to the right of Holders of record on the relevant record date to
receive interest due on the relevant interest payment date), with the net cash
proceeds of one or more private placements to Persons other than Affiliates of
the Company or underwritten public offerings of Common Stock of the Company
resulting in gross proceeds of at least $100,000,000 in the aggregate; provided
                                                                       --------
that at least 65% of the original aggregate principal amount of the Securities
would remain outstanding immediately after giving effect to such redemption. Any
such redemption shall be made within 90 days of such private placement or public
offering upon not less than 30 nor more than 60 days' prior notice.

     Upon the occurrence of a Change of Control Triggering Event, the Holder of
this Security may require the Company, subject to certain limitations provided
in the Indenture, to repurchase this Security at a purchase price in cash in an
amount equal to 101% of the principal amount thereof, plus accrued and unpaid
interest (if any) to the purchase date (subject to the right of Holders of
record on the relevant record date to receive interest due on the relevant
interest payment date).

     In the case of any redemption of Securities, interest installments whose
Stated Maturity is on or prior to the 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 Date referred to on the face
hereof.  Securities (or portions thereof) for whose redemption and payment
provision is made in accordance with the Indenture shall cease to bear interest
from and after the Redemption Date.

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

     To guarantee the due and punctual payment of the principal, premium (if
any) and interest on the Securities and all other amounts payable by the Company
under the
<PAGE>

                                     A-10

Indenture and the Securities when and as the same shall be due and payable,
whether at maturity, by acceleration or otherwise, according to the terms of the
Securities and the Indenture, the Guarantors, if any, will unconditionally
guarantee such obligations on a senior unsecured basis pursuant to the terms of
the Indenture.

     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 (a) the
entire indebtedness of the Company on this Security and (b) certain restrictive
covenants and Defaults and Events of Default, upon compliance by the Company
with certain conditions set forth therein, which provisions apply to this
Security.

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders under the Indenture at any time by the
Company and the Trustee with the consent of the Holders of a majority in
aggregate principal amount 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.  Without the consent of any
Holder of Securities, the Company and the Trustee may amend or modify the
Indenture for certain purposes specified therein, including the release of
Guarantors, if any, from Restricted Subsidiary Guarantees as provided by the
terms of the Indenture.  Any such consent or waiver by or on behalf of 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.
<PAGE>

                                     A-11

     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 registerable on the Security Register of
the Company, upon surrender of this Security for registration of transfer at the
office or agency of the Company maintained for such purpose in The City of New
York, duly endorsed by, or accompanied by a written instrument of transfer in
form satisfactory to the Company and the 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 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 (Euro) 1,000 and any integral multiple thereof. As provided in
the Indenture and subject to certain limitations therein set forth, the
Securities are exchangeable for a like 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 registration of transfer or
exchange of the Securities, but the Company may require payment of a sum
sufficient to cover any transfer tax or other similar governmental charge
payable in connection therewith.

     Prior to the time of 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 neither
the Company, the Trustee nor any agent shall be affected by notice to the
contrary.

     THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW
OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF
CONFLICTS
<PAGE>

                                     A-12

OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION
WOULD BE REQUIRED THEREBY.

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

                                     A-13

                Form of Trustee's Certificate of Authentication
                -----------------------------------------------

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

                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     Dated:  __________________

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

                                                THE BANK OF NEW YORK, as
                                                Trustee

                                                By:
                                                    ---------------------------
                                                     Authorized Signatory
<PAGE>

                                     A-14

                                Assignment Form
                                ---------------

     If you, the holder, want to assign this Security, fill in the form below
and have your signature guaranteed:

I or we assign and transfer this Security to_______________________

___________________________________________________________________
(Insert assignee's social security or tax ID number)

                                                ___________________

(Print or type assignee's name, address and zip code)

                                                ___________________

                                                ___________________

                                                ___________________

and irrevocably appoint_______________________

of  _______________________________

    ______________________________

agent to transfer this Security on the books of the Company.  The agent may
substitute another to act for such agent.
<PAGE>

                                     A-15

     In connection with any transfer of any of the Securities evidenced by this
certificate occurring prior to the date that is two years (or such shorter
period as may be prescribed by Rule 144(k) under the Securities Act or any
successor provision thereunder) after the later of the date of original issuance
of such Securities (or any Predecessor Security) or three months after the last
date, if any, on which such Securities (or any Predecessor Security) were owned
by the Company or any Affiliate of the Company, the undersigned confirms that
such Securities are being transferred in accordance with its terms:

CHECK ONE BOX BELOW

     (1)  [_]  to the Company; or

     (2)  [_]  pursuant to an effective registration statement under the
               Securities Act of 1933; or

     (3)  [_]  inside the United States to a "qualified institutional buyer" (as
               defined in Rule 144A under the Securities Act of 1933) that
               purchases for its own account or for the account of a qualified
               institutional buyer to whom notice is given that such transfer is
               being made in reliance on Rule 144A, in each case pursuant to and
               in compliance with Rule 144A under the Securities Act of 1933; or

     (4)  [_]  outside the United States in an offshore transaction within the
               meaning of Regulation S under the Securities Act in compliance
               with Rule 904 under the Securities Act of 1933, provided that, if
               such transfer is being effected by certain transferors specified
               in the Indenture prior to the date that is 40 days following the
               Issue Date, a certificate which may be obtained from the Company
               or the Trustee is delivered by the transferee to the Company and
               the Trustee; or
<PAGE>

                                     A-16

     (5)  [_]  to an institutional "accredited investor" (as defined in Rule
               501(a)(1), (2), (3) or (7) under the Securities Act of 1933) that
               has furnished to the Trustee a signed letter containing certain
               representations and agreements (the form of which letter can be
               obtained from the Trustee or the Company), provided that certain
               transferors specified in the Indenture may not transfer this
               Security pursuant to this clause (5) prior to the date that is 40
               days following the Issue Date; or

     (6)  [_]  pursuant to another available exemption from registration
               provided by Rule 144 under the Securities Act of 1933.

Unless one of the boxes is checked, the Trustee will refuse to register any of
the Securities evidenced by this certificate in the name of any person other
than the registered holder thereof; provided, however, that if box (4), (5) or
                                    --------  -------
(6) is checked, the Trustee may require, prior to registering any such transfer
of the Securities, such legal opinions, certifications and other information as
the Company has reasonably requested to confirm that such transfer is being made
pursuant to an exemption from, or in a transaction not subject to, the
registration requirements of the Securities Act of 1933.

Dated:  _______________             Your signature:  ____________________
                                    -                              (Sign
                                    exactly as your name appears on the
                                    other side of this Security)

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

Signature Guarantee:  ________________________________________________

           TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED:
<PAGE>

                                     A-17

     The undersigned represents and warrants that it is purchasing this Security
for its own account or an account with respect to which it exercises sole
investment discretion and that it and any such account is a "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933 and is aware that the sale to it is being made in reliance on Rule 144A and
acknowledges that it has received such information regarding the Company as the
undersigned has requested pursuant to Rule 144A (including the information
specified in Rule 144A(d)(4)) or has determined not to request such information
and that it is aware that the transferor is relying upon the undersigned's
foregoing representations in order to claim the exemption from registration
provided by Rule 144A.

Dated:_____________________      ____________________________
                                 NOTICE:  To be executed by an
                                          executive officer

                      Option of Holder to Elect Purchase
                      ----------------------------------

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

     If you wish to have a portion of this Security purchased by the Company
pursuant to Section 1009 or 1016 of the Indenture, state the amount:
$___________________.

Dated: ________________       Your Signature:  _________________
                              (Sign exactly as your name appears
                              on the other side of this
                              Security)
<PAGE>

                                     A-18

                     [TO BE ATTACHED TO GLOBAL SECURITIES]

             SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

          The initial principal amount of this Global Security is (Euro)[   ].
The following increases or decreases in this Global Security have been made:

<TABLE>
<CAPTION>
Date of          Amount of decrease    Amount of increase       Principal amount of       Signature of
Transfer         in Principal          in Principal Amount      this Global Security      authorized
                 Amount of this        of this Global           following such decrease   signatory of Trustee
                 Global Security       Security                 or increase               or Security Registrar
<S>              <C>                   <C>                      <C>                       <C>
</TABLE>

<PAGE>

                                   EXHIBIT B

                        FORM OF SUPPLEMENTAL INDENTURE

                    SUPPLEMENTAL INDENTURE (this "Supplemental Indenture") dated
               as of, among [GUARANTOR] (the "New Guarantor"), a subsidiary of
               Level 3 Communications, Inc. (or its successor), a Delaware
               corporation (the "Company"), LEVEL 3 COMMUNICATIONS, INC., on
               behalf of itself and the Guarantors (the "Existing Guarantors"),
               if any, under the Indenture referred to below, and THE BANK OF
               NEW YORK, a New York banking corporation, as trustee under the
               indenture referred to below (the "Trustee").

                             W I T N E S S E T H :

          WHEREAS the Company has heretofore executed and delivered to the
Trustee an Indenture dated as of February 29, 2000 (the "Indenture"; capitalized
terms used but not defined herein having the meanings assigned thereto in the
Indenture), providing for the issuance of an aggregate principal amount of up to
(Euro) 300,000,000 of 11 1/4% Senior Euro Notes Due 2010 (the "Securities");

          WHEREAS the Indenture permits the New Guarantor to execute and deliver
to the Trustee a supplemental indenture pursuant to which the New Guarantor
shall unconditionally guarantee all the Company's obligations under the
Securities pursuant to a Guarantee on the terms and conditions set forth herein;

          WHEREAS the Guarantee contained in this Supplemental Indenture shall
constitute a "Restricted Subsidiary Guarantee", and the New Guarantor shall
constitute a "Guarantor", for all purposes of the Indenture; and

          WHEREAS pursuant to Section 901 of the Indenture, the Trustee and the
Company are authorized to execute and deliver this Supplemental Indenture;
<PAGE>

                                      B-2

     NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the New
Guarantor, the Company, the Existing Guarantors and the Trustee mutually
covenant and agree for the equal and ratable benefit of the holders of the
Securities as follows:

     1.  Guaranties.  The New Guarantor hereby unconditionally guarantees,
         ----------
jointly and severally, to each Holder and to the Trustee and its successors and
assigns (a) the full and punctual payment of principal of (and premium, if any)
and interest on the Securities when due, whether at Stated Maturity, by
acceleration, by redemption or otherwise, and all other monetary obligations of
the Company under the Indenture and the Securities and (b) the full and punctual
performance within applicable grace periods of all other obligations of the
Company under the Indenture and the Securities (all the foregoing being
hereinafter collectively called the "Obligations"). The New Guarantor further
agrees that the Obligations may be extended or renewed, in whole or in part,
without notice or further assent from the New Guarantor and that the New
Guarantor will remain bound under this Supplemental Indenture notwithstanding
any extension or renewal of any Obligation.

     The New Guarantor waives presentation to, demand of, payment from and
protest to the Company of any of the Obligations and also waives notice of
protest for nonpayment. The New Guarantor waives notice of any default under the
Securities or the Obligations. The obligations of the New Guarantor hereunder
shall not be affected by (a) the failure of any Holder or the Trustee to assert
any claim or demand or to enforce any right or remedy against the Company or any
other Person under the Indenture, the Securities or any other agreement or
otherwise; (b) any extension or renewal of any thereof; (c) any rescission,
waiver, amendment or modification of any of the terms or provisions of the
Indenture, the Securities or any other agreement; (d) the release of any
security held by any Holder or the Trustee for the Obligations or any of them;
(e) the failure of any Holder or the Trustee to exercise any right or remedy
against any other guarantor of the Obligations; or (f) any change in the
ownership of the New Guarantor.
<PAGE>

                                      B-3

          The New Guarantor further agrees that its Guarantee herein constitutes
a guarantee of payment, performance and compliance when due (and not a guarantee
of collection) and waives any right to require that any resort be had by any
Holder or the Trustee to any security held for payment of the Obligations.

          Except as expressly set forth in Sections 803, 1017, 1019, 1202 and
1203 of the Indenture, the obligations of the New Guarantor hereunder shall not
be subject to any reduction, limitation, impairment or termination for any
reason, including any claim of waiver, release, surrender, alteration or
compromise, and shall not be subject to any defense of setoff, counterclaim,
recoupment or termination whatsoever or by reason of the invalidity, illegality
or unenforceability of the Obligations or otherwise. Without limiting the
generality of the foregoing, the obligations of the New Guarantor herein shall
not be discharged or impaired or otherwise affected by the failure of any Holder
or the Trustee to assert any claim or demand or to enforce any remedy under the
Indenture, the Securities or any other agreement, by any waiver or modification
of any thereof, by any default, failure or delay, willful or otherwise, in the
performance of the obligations, or by any other act or thing or omission or
delay to do any other act or thing which may or might in any manner or to any
extent vary the risk of the New Guarantor or would otherwise operate as a
discharge of the New Guarantor as a matter of law or equity.

          The New Guarantor further agrees that its Guarantee herein shall
continue to be effective or be reinstated, as the case may be, if at any time
payment, or any part thereof, of principal of or (premium, if any) interest on
any Obligation is rescinded or must otherwise be restored by any Holder or the
Trustee upon the bankruptcy or reorganization of the Company or otherwise.

          In furtherance of the foregoing and not in limitation of any other
right which any Holder or the Trustee has at law or in equity against the New
Guarantor by virtue hereof, upon the failure of the Company to pay the principal
of (or premium, if any) or interest on any Obligation when and as the same shall
become due, whether at Stated Maturity, by acceleration, by redemption or
otherwise, or to perform or comply with any other
<PAGE>

                                      B-4

Obligation, the New Guarantor hereby promises to and will, upon receipt of
written demand by the Trustee, forthwith pay, or cause to be paid, in cash, to
the Holders or the Trustee an amount equal to the sum of (i) the unpaid amount
of such Obligations, (ii) accrued and unpaid interest on such Obligations (but
only to the extent not prohibited by law) and (iii) all other monetary
Obligations of the Company to the Holders and the Trustee.

          The New Guarantor agrees that it shall not be entitled to any right of
subrogation in respect of any Obligations guaranteed hereby until payment in
full in cash of all Obligations. The New Guarantor further agrees that, as
between it, on the one hand, and the Holders and the Trustee, on the other hand,
(x) the maturity of the Obligations guaranteed hereby may be accelerated as
provided in Article Five of the Indenture for the purposes of the New
Guarantor's Guarantee herein, notwithstanding any stay, injunction or other
prohibition preventing such acceleration in respect of the Obligations
guaranteed hereby, and (y) in the event of any declaration of acceleration of
such obligations as provided in Article Five of the Indenture, such Obligations
(whether or not due and payable) shall forthwith become due and payable by the
New Guarantor for the purposes of this Section.

          The New Guarantor also agrees to pay any and all costs and expenses
(including reasonable attorneys' fees) incurred by the Trustee or any Holder in
enforcing any rights under this Section 1.

          2.  Contribution.  Each of the Company and the New Guarantor (a
              -------------
"Contributing Party") agrees that, in the event a payment shall be made by any
other Guarantor under any Restricted Subsidiary Guarantee (the "Claiming
Guarantor"), the Contributing Party shall indemnify the Claiming Guarantor in an
amount equal to the amount of such payment multiplied by a fraction, the
numerator of which shall be the net worth of the Contributing Party (which, in
the case of the Company, shall be measured on the Issue Date, and in the case of
the New Guarantor, on the date hereof) and the denominator of which shall be the
aggregate net worth of the Company on the Issue Date and the Guarantors on
respective dates of the Supplemental Indentures executed and delivered by such
Guarantors.
<PAGE>

                                      B-5

          3.  Successors and Assigns.  This Supplemental Indenture shall be
              -----------------------
binding upon the New Guarantor and its successors and assigns and shall enure to
the benefit of the successors and assigns of the Trustee and the Holders and, in
the event of any transfer or assignment of rights by any Holder or the Trustee,
the rights and privileges conferred upon that party in the Indenture and in the
Securities shall automatically extend to and be vested in such transferee or
assignee, all subject to the terms and conditions of this Indenture.

          4.  No Waiver.  Neither a failure nor a delay on the part of either
              ----------
the Trustee or the Holders in exercising any right, power or privilege under
this Supplemental Indenture, the Indenture or the Securities shall operate as a
waiver thereof, nor shall a single or partial exercise thereof preclude any
other or further exercise of any right, power or privilege. The rights, remedies
and benefits of the Trustee and the Holders herein and therein expressly
specified are cumulative and not exclusive of any other rights, remedies or
benefits which either may have under this Supplemental Indenture, the Indenture
or the Securities at law, in equity, by statute or otherwise.

          5.  Modification.  No modification, amendment or waiver of any
              -------------
provision of this Supplemental Indenture, nor the consent to any departure by
the New Guarantor therefrom, shall in any event be effective unless the same
shall be in writing and signed by the Trustee, and then such waiver or consent
shall be effective only in the specific instance and for the purpose for which
given. No notice to or demand on the New Guarantor in any case shall entitle the
New Guarantor to any other or further notice or demand in the same, similar or
other circumstances.

          6.  Opinion of Counsel.  Concurrently with the execution and delivery
              -------------------
of this Supplemental Indenture, the Company shall deliver to the Trustee an
Opinion of Counsel to the effect that this Supplemental Indenture has been duly
authorized, executed and delivered by each of the New Guarantor and the Company
and that, subject to the application of bankruptcy, insolvency, moratorium,
fraudulent conveyance or transfer and other similar laws relating to creditors'
rights generally and to the principles of equity, whether considered in a
proceeding at law or in equity, the Guarantee of the New Guarantor is a legal,
valid and binding obligation of the New Guarantor, enforceable against the New
Guarantor in accordance with its terms.
<PAGE>

                                      B-6

          7.  Ratification of Indenture; Supplemental Indentures Part of
              ----------------------------------------------------------
Indenture.  Except as expressly amended hereby, the Indenture is in all respects
----------
ratified and confirmed and all the terms, conditions and provisions thereof
shall remain in full force and effect. This Supplemental Indenture shall form a
part of the Indenture for all purposes, and every holder of Securities
heretofore or hereafter authenticated and delivered shall be bound hereby.

          8.  Governing Law.  THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY,
              --------------
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT
THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

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

          10. Effect of Headings.  The Section headings herein are for
              -------------------
convenience only and shall not effect the construction thereof.
<PAGE>

                                      B-7

          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed as of the date first above written.

                                  [NEW GUARANTOR],

                                    by

                                      __________________________________
                                      Name:
                                      Title:

                                  LEVEL 3 COMMUNICATIONS, INC., on behalf of
                                  itself and the Existing Guarantors, if any,

                                    by

                                      __________________________________
                                      Name:
                                      Title:

                                  THE BANK OF NEW YORK, as Trustee,

                                    by

                                      __________________________________
                                      Name:
                                      Title:

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