METROCALL INC
8-K, 1997-10-23
RADIOTELEPHONE COMMUNICATIONS
Previous: HUNTCO INC, 8-K, 1997-10-23
Next: ESS TECHNOLOGY INC, S-3, 1997-10-23



<PAGE>   1
                     SECURITIES AND EXCHANGE COMMISSION
                           Washington, D.C.  20549



                                   FORM 8-K
                               CURRENT REPORT


   Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported): October 16, 1997



                               Metrocall, Inc.
                               ---------------
           (Exact name of registrant as specified in its charter)



<TABLE>
<S>                                        <C>                                       <C>
         Delaware                              0-21924                                        54-1215634
         --------                              -------                                        ----------
(State or other jurisdiction               (Commission                               (IRS Employer
of incorporation)                          file number)                              Identification No.)
</TABLE>

                 6677 Richmond Highway, Alexandria, Virginia
                 -------------------------------------------
                   (Address of Prinicpal Executive Offices)

Registrant's telephone number, including area code: (703) 660-6677



                             Not Applicable
                         ----------------------
      (Former name or former address, if changed since last report)

                                     Page 1
<PAGE>   2



ITEM 5.  OTHER EVENTS

         On October 16, 1997, Metrocall, Inc. agreed to sell $200 million
aggregate principal amount of Senior Subordinated Notes due 2007 (the "Notes")
in a private placement.  The Notes will be issued pursuant to an indenture
dated October 21, 1997 (the "Indenture") between Metrocall, Inc. and First
Union National Bank, as trustee.  The press release announcing this transaction
is attached as Exhibit 99.1.  The Indenture is attached as Exhibit 4.1.




                                     Page 2
<PAGE>   3

ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

<TABLE>
<CAPTION>
Exhibit                   Description
- -------                   -----------
   <S>                    <C>
    4.1                   Indenture dated as of October 21, 1997 between
                          Metrocall, Inc. and First Union National Bank.

   99.1                   Press Release dated October 17, 1997.

</TABLE>




                                     Page 3
<PAGE>   4
                                   SIGNATURE

        Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Date: October 23, 1997
                             
                             METROCALL, INC.
                             
                             
                             By:    /s/ Vincent D. Kelly                       
                                -----------------------------------------------
                                      Vincent D. Kelly
                                      Chief Financial Officer, Executive Vice
                                      President and Treasurer





                                     Page 4
<PAGE>   5
                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit                   Description
- -------                   -----------
  <S>                     <C>
   4.1                    Indenture dated as of October 21, 1997 between
                          Metrocall, Inc. and First Union National Bank.

  99.1                    Press Release dated October 17, 1997.


</TABLE>





                                     Page 5

<PAGE>   1
                                                                    EXHIBIT 4.1




                              [INSERT INDENTURE]


<PAGE>   2
 
================================================================================
 
                                METROCALL, INC.
                                  $200,000,000
                   9 3/4% SENIOR SUBORDINATED NOTES DUE 2007

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

                                   INDENTURE
                          DATED AS OF OCTOBER 21, 1997
 
                            ------------------------
 
                           FIRST UNION NATIONAL BANK
                                   AS TRUSTEE
 
================================================================================
<PAGE>   3
 
                             CROSS-REFERENCE TABLE
 
<TABLE>
<CAPTION>
                                                                                      INDENTURE
TIA SECTION                                                                            SECTION
- ------------                                                                          ---------
<S>          <C>                                                                      <C>
SECTION 310  (a)(1).................................................................   7.10
             (a)(2).................................................................   7.10
             (a)(3).................................................................   N.A.
             (a)(4).................................................................   N.A.
             (a)(5).................................................................   7.10
             (b)....................................................................   7.8
             .......................................................................   7.10
             .......................................................................   12.2
             (c)....................................................................   N.A.
SECTION 311  (a)....................................................................   7.11
             (b)....................................................................   7.11
             (c)....................................................................   N.A.
SECTION 312  (a)....................................................................   2.6
             (b)....................................................................   12.3
             (c)....................................................................   12.3
SECTION 313  (a)....................................................................   7.6
             (b)(1).................................................................   7.6
             (b)(2).................................................................   7.6
             (c)....................................................................   7.6
             .......................................................................   12.2
             (d)....................................................................   7.6
SECTION 314  (a)....................................................................   4.4
             .......................................................................   4.7
             .......................................................................   12.2
             (b)....................................................................   N.A.
             (c)(1).................................................................   12.4
             (c)(2).................................................................   12.4
             (c)(3).................................................................   N.A.
             (d)....................................................................   N.A.
             (e)....................................................................   12.5
             (f)....................................................................   N.A.
SECTION 315  (a)....................................................................   7.1(2)
             (b)....................................................................   7.5
             .......................................................................   12.2
             (c)....................................................................   7.1(1)
             (d)....................................................................   7.1(3)
             (e)....................................................................   6.11
SECTION 316  (a)(last sentence).....................................................   2.12
             (a)(1)(A)..............................................................   6.5
             .......................................................................   6.6
             (a)(1)(B)..............................................................   6.4
             (a)(2).................................................................   N.A.
             (b)....................................................................   6.7
             (c)....................................................................   9.4
SECTION 317  (a)(1).................................................................   6.2
             .......................................................................   6.3
             (a)(2).................................................................   6.2
             .......................................................................   6.9
             (b)....................................................................   2.5
SECTION 318  (a)....................................................................   12.1
SECTION 318  (c)....................................................................   12.1
</TABLE>
 
- ------------
N.A. means not applicable.
NOTE: This Cross-Reference Table is not part of the Indenture.
<PAGE>   4
 
                              TABLE OF CONTENTS**
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----
<S>              <C>                                                                      <C>
                                            ARTICLE 1
                           DEFINITIONS AND INCORPORATION BY REFERENCE
 
SECTION  1.1.    Definitions...........................................................      1
SECTION  1.2.    Other Definitions.....................................................     10
SECTION  1.3.    Incorporation by Reference of Trust Indenture Act.....................     10
SECTION  1.4.    Rules of Construction.................................................     10
SECTION  1.5.    Acts of Holders.......................................................     10

                                            ARTICLE 2
                                            THE NOTES

SECTION  2.1.    Form and Dating.......................................................     11
SECTION  2.2.    Restrictive Legends...................................................     12
SECTION  2.3.    Execution and Authentication..........................................     13
SECTION  2.4.    Registrar and Paying Agent............................................     14
SECTION  2.5.    Paying Agent to Hold Money in Trust...................................     14
SECTION  2.6.    Noteholder Lists......................................................     14
SECTION  2.7.    Transfer and Exchange.................................................     14
SECTION  2.8.    Book-Entry Provisions for Global Notes................................     15
SECTION  2.9.    Special Transfer Provisions...........................................     16
SECTION  2.10.   Replacement Notes.....................................................     18
SECTION  2.11.   Outstanding Notes.....................................................     18
SECTION  2.12.   Treasury Notes........................................................     19
SECTION  2.13.   Temporary Notes.......................................................     19
SECTION  2.14.   Cancellation..........................................................     19
SECTION  2.15.   Defaulted Interest....................................................     19
SECTION  2.16.   Persons Deemed Owners.................................................     20
SECTION  2.17.   CUSIP, CINS and ISIN Numbers..........................................     20
SECTION  2.18.   Issuance of Additional Notes..........................................     20
 
                                            ARTICLE 3
                                           REDEMPTION

SECTION  3.1.    Notices to Trustee....................................................     20
SECTION  3.2.    Selection of Notes to Be Redeemed.....................................     21
SECTION  3.3.    Notice of Redemption..................................................     21
SECTION  3.4.    Effect of Notice of Redemption........................................     22
SECTION  3.5.    Deposit of Redemption Price...........................................     22
SECTION  3.6.    Notes Redeemed in Part................................................     22
SECTION  3.7.    Optional Redemption...................................................     22
SECTION  3.8.    Redemption Upon Change of Control Offer...............................     22
SECTION  3.9.    Redemption Pursuant to Section 4.15...................................     22
</TABLE>
 
- ---------------
** This Table of Contents shall not, for any purpose, be deemed a part of the
   Indenture.
<PAGE>   5
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----
<S>              <C>                                                                      <C>
                                            ARTICLE 4
                                            COVENANTS

SECTION  4.1.    Payment of Principal and Interest.....................................     23
SECTION  4.2.    Maintenance of Office or Agency for Notices and Demands...............     23
SECTION  4.3.    Insurance Matters.....................................................     23
SECTION  4.4.    Compliance Certificate; Notice of Default.............................     23
SECTION  4.5.    Corporate Existence...................................................     24
SECTION  4.6.    Payment of Taxes and Other Claims.....................................     24
SECTION  4.7.    Reports...............................................................     24
SECTION  4.8.    Waiver of Stay, Extension or Usury Laws...............................     24
SECTION  4.9.    Limitation on Incurrence of Debt......................................     25
SECTION  4.10.   Limitation on Certain Debt............................................     25
SECTION  4.11.   Limitation on Restricted Payments.....................................     25
SECTION  4.12.   Limitation on Dividend and Other Payment Restrictions Affecting 
                   Subsidiaries........................................................     26
SECTION  4.13.   Limitation on Liens...................................................     27
SECTION  4.14.   Limitation on Transactions with Affiliates and Related Persons........     27
SECTION  4.15.   Limitation on Certain Asset Dispositions..............................     27
SECTION  4.16.   Limitation on Issuances and Sales of Capital Stock of Subsidiaries....     28
SECTION  4.17.   Change of Control.....................................................     29
 
                                            ARTICLE 5
                                           SUCCESSORS

SECTION  5.1.    Limitation on Mergers, Consolidations and Certain Sales of Assets.....     30
SECTION  5.2.    Successor Corporation Substituted.....................................     30
 
                                            ARTICLE 6
                                      DEFAULTS AND REMEDIES

SECTION  6.1.    Events of Default.....................................................     30
SECTION  6.2.    Acceleration..........................................................     31
SECTION  6.3.    Other Remedies........................................................     32
SECTION  6.4.    Waiver of Past Defaults...............................................     32
SECTION  6.5.    Control by Majority...................................................     33
SECTION  6.6.    Limitation on Suits...................................................     33
SECTION  6.7.    Rights of Holders to Receive Payment..................................     33
SECTION  6.8.    Collection Suit by Trustee............................................     33
SECTION  6.9.    Trustee May File Proofs of Claim......................................     33
SECTION  6.10.   Priorities............................................................     34
SECTION  6.11.   Undertaking for Costs.................................................     34
 
                                            ARTICLE 7
                                             TRUSTEE

SECTION  7.1.    Duties of Trustee.....................................................     34
SECTION  7.2.    Rights of Trustee.....................................................     35
SECTION  7.3.    Individual Rights of Trustee..........................................     35
SECTION  7.4.    Trustee's Disclaimer..................................................     35
SECTION  7.5.    Notice of Defaults....................................................     36
SECTION  7.6.    Reports by Trustee to Holders.........................................     36
</TABLE>
<PAGE>   6
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----
<S>              <C>                                                                      <C>
SECTION  7.7.    Compensation and Indemnity............................................     36
SECTION  7.8.    Replacement of Trustee................................................     37
SECTION  7.9.    Successor Trustee by Merger, Etc. ....................................     37
SECTION  7.10.   Eligibility; Disqualification.........................................     37
SECTION  7.11.   Preferential Collection of Claims Against Company.....................     38
 
                                            ARTICLE 8
                                     DISCHARGE OF INDENTURE

SECTION  8.1.    Legal Defeasance and Covenant Defeasance of the Notes.................     38
SECTION  8.2.    Termination of Obligations upon Cancellation of the Notes.............     40
SECTION  8.3.    Survival of Certain Obligations.......................................     40
SECTION  8.4.    Acknowledgment of Discharge by Trustee................................     40
SECTION  8.5.    Application of Trust Assets...........................................     40
SECTION  8.6.    Repayment to the Company; Unclaimed Money.............................     40
SECTION  8.7.    Reinstatement.........................................................     41
 
                                            ARTICLE 9
                                           AMENDMENTS

SECTION  9.1.    Without Consent of Holders............................................     41
SECTION  9.2.    With Consent of Holders...............................................     41
SECTION  9.3.    Compliance with Trust Indenture Act...................................     42
SECTION  9.4.    Revocation and Effect of Consents.....................................     42
SECTION  9.5.    Notation on or Exchange of Notes......................................     43
SECTION  9.6.    Trustee to Sign Amendments, Etc. .....................................     43
 
                                           ARTICLE 10
                                     MEETINGS OF NOTEHOLDERS

SECTION  10.1.   Purposes for Which Meetings May Be Called.............................     43
SECTION  10.2.   Manner of Calling Meetings............................................     44
SECTION  10.3.   Call of Meetings by Company or Holders................................     44
SECTION  10.4.   Who May Attend and Vote at Meetings...................................     44
SECTION  10.5.   Regulations May Be Made by Trustee; Conduct of the Meeting; Voting
                   Rights; Adjournment.................................................     44
SECTION  10.6.   Voting at the Meeting and Record to Be Kept...........................     45
SECTION  10.7.   Exercise of Rights of Trustee or Noteholders May Not Be Hindered or
                   Delayed by Call of Meeting..........................................     45
SECTION  10.8.   Procedures Not Exclusive..............................................     45
 
                                           ARTICLE 11
                                          SUBORDINATION

SECTION  11.1.   Notes Subordinated to Senior Debt.....................................     46
SECTION  11.2.   Priority and Payment over of Proceeds in Certain Events...............     46
SECTION  11.3.   Payments May Be Made Prior to Notice..................................     48
SECTION  11.4.   Rights of Holders of Senior Debt Not to Be Impaired...................     48
SECTION  11.5.   Authorization to Trustee to Take Action to Effectuate Subordination...     48
SECTION  11.6.   Subrogation...........................................................     48
</TABLE>
<PAGE>   7
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----
<S>              <C>                                                                      <C>
SECTION  11.7.   Obligations of Company Unconditional..................................     49
SECTION  11.8.   The Trustee Entitled to Assume Payments Not Prohibited in Absence of
                   Notice..............................................................     49
SECTION  11.9.   Right of Trustee to Hold Senior Debt..................................     49
SECTION  11.10.  No Implied Covenants By or Obligations of the Trustee.................     49
 
                                           ARTICLE 12
                                          MISCELLANEOUS

SECTION  12.1.   Trust Indenture Act Controls..........................................     50
SECTION  12.2.   Notices...............................................................     50
SECTION  12.3.   Communication by Holders with Other Holders...........................     51
SECTION  12.4.   Certificate and Opinion as to Conditions Precedent....................     51
SECTION  12.5.   Statements Required in Certificate or Opinion.........................     51
SECTION  12.6.   Rules by Trustee and Agents...........................................     51
SECTION  12.7.   Legal Holidays........................................................     51
SECTION  12.8.   No Recourse Against Others............................................     51
SECTION  12.9.   Governing Law.........................................................     51
SECTION  12.10.  No Adverse Interpretation of Other Agreements.........................     52
SECTION  12.11.  Successors............................................................     52
SECTION  12.12.  Severability..........................................................     52
SECTION  12.13.  Counterpart Originals.................................................     52
SECTION  12.14.  Variable Provisions...................................................     52
SECTION  12.15.  Qualification of Indenture............................................     52
SECTION  12.16.  Table of Contents, Headings, Etc. ....................................     52
SECTION  12.17.  Indenture Controls over Form of Note..................................     52
 
Signatures.............................................................................     53
 
Exhibit A  Form of Note................................................................    A-1
 
Exhibit B  Form of Certificate.........................................................    B-1
 
Exhibit C  Form of Certificate to Be Delivered in Connection with Transfers to Non-QIB
  Accredited Investors.................................................................    C-1
 
Exhibit D  Form of Certificate to Be Delivered in Connection with Transfers Pursuant to
  Regulation S.........................................................................    D-1
</TABLE>
<PAGE>   8
 
     INDENTURE dated as of October 21, 1997 between Metrocall, Inc., a Delaware
corporation (the "Company"), and First Union National Bank, a national banking
association with its principal corporate office in Richmond, Virginia, as
trustee (the "Trustee").
 
     Each party agrees as follows for the benefit of the other party and for the
equal and ratable benefit of the Holders (as defined below) of the Company's
9 3/4% Senior Subordinated Notes due 2007 (the "Notes"):
 
                                   ARTICLE 1
 
                   DEFINITIONS AND INCORPORATION BY REFERENCE
 
     SECTION 1.1.  Definitions.
 
     The term "ACQUIRED DEBT" shall mean, with respect to any Person, (i) Debt
of such Person existing at the time such Person becomes a Subsidiary of the
Company (or such Person is merged into a Subsidiary of the Company) and (ii)
Debt assumed by such Person in connection with the acquisition of assets by such
Person from another Person (other than the Company or any of its Subsidiaries),
PROVIDED that such Debt was not Incurred in connection with or in contemplation
of such Person becoming a Subsidiary of the Company or such acquisition of
assets, as the case may be.
 
     The term "AFFILIATE" of any Person shall mean 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 "controlling" and
"controlled" have meanings correlative to the foregoing.
 
     The term "AGENT" shall mean any registrar or paying agent, Transfer Agent,
custodian for the Notes, or authenticating agent or co-registrar.
 
     The term "AGENT MEMBERS" shall have the meaning provided in Section 2.8(a).
 
     The term "ASSET DISPOSITION" by any Person shall mean any transfer,
conveyance, sale, lease or other disposition by such Person or any of its
Subsidiaries (including a consolidation or merger or other sale of any such
Subsidiary with, into or to another Person in a transaction in which such
Subsidiary ceases to be a Subsidiary, but excluding a disposition by a
Subsidiary of such Person to such Person or a wholly owned Subsidiary of such
Person or by such Person to a wholly owned Subsidiary of such Person, and
excluding the creation of a lien, pledge or security interest) of (i) shares of
Capital Stock (other than directors' qualifying shares) or other ownership
interests of a Subsidiary of such Person, (ii) substantially all of the assets
of such Person or any of its Subsidiaries representing a division or line of
business or (iii) other assets or rights of such Person or any of its
Subsidiaries outside of the ordinary course of business, in any case where the
consideration received by such Person or a Subsidiary of such Person or the fair
market value of the assets subject to such disposition exceeds $1.0 million.
 
     The term "ASSET EXCHANGE TRANSACTION" shall mean any transaction pursuant
to which properties or assets of the Company or a Subsidiary of the Company
constituting a paging system within a geographically identifiable area and
related properties and assets (an "Identifiable Paging System") or all of the
shares of Capital Stock of a Subsidiary of the Company, the properties and
assets of which constitute an Identifiable Paging System, are to be exchanged
for properties or assets constituting an Identifiable Paging System of another
Person or Persons or all of the shares of Capital Stock of another Person or
Persons the properties and assets of which constitute an Identifiable Paging
System.
 
     The term "ATTRIBUTABLE DEBT" in respect of a sale and leaseback transaction
shall mean, at the time of determination, the present value (discounted at the
interest rate implicit in the lease, compounded semiannually) of the obligation
of the lessee of the property subject to such sale and leaseback transaction for
rental payments during the remaining term of the lease included in such
transaction including any period for which such lease has been extended or may,
at the option of the lessor, be extended or until the earliest date on which the
lessee may terminate such lease without penalty or upon payment of penalty (in
which case the
<PAGE>   9
 
rental payments shall include such penalty), after excluding all amounts
required to be paid on account of maintenance and repairs, insurance, taxes,
assessments, water, utilities and similar charges.
 
     The term "BANKRUPTCY LAW" shall mean Title 11 of the United States Code or
any similar Federal or state law for the relief of debtors.
 
     The term "BOARD OF DIRECTORS," when used with reference to the Company,
shall mean the Board of Directors of the Company, or the Executive Committee of
the Board of Directors of the Company.
 
     The term "BUSINESS DAY" shall mean each Monday, Tuesday, Wednesday,
Thursday and Friday which is not a day on which banking institutions in New
York, New York and, if different, the city in which the Corporate Trust Office
is located are authorized or obligated by law or executive order to close.
 
     The term "CAPITAL LEASE OBLIGATION" of any Person shall mean the obligation
to pay rent or other payment amounts under a lease of (or other Debt
arrangements conveying the right to use) real or personal property of such
Person which is required to be classified and accounted for as a capital lease
or a liability on the face of a balance sheet of such Person in accordance with
GAAP. 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 term "CAPITAL STOCK" of any Person shall mean any and all shares,
interests, participations or other equivalents (however designated) of corporate
stock of such Person and all other equity interests in such Person.
 
     The term "CEDEL Bank" shall have the meaning provided in Section 2.1.
 
     The term "CHANGE OF CONTROL" shall mean the occurrence of one or more of
the following events: (i) a person or entity or group (as that term is used in
Section 13(d)(3) of the Exchange Act) of persons or entities shall have become
the beneficial owner of a majority (by voting power or otherwise) of the
securities of the Company ordinarily having the right to vote in the election of
directors; (ii) during any consecutive three-year period commencing on or after
the date hereof, individuals who at the beginning of such period constituted the
Board of Directors of the Company (together with any directors who are members
of such Board of Directors of the Company on the date hereof and any new
directors whose election by such Board of Directors of the Company or whose
nomination for election by the stockholders of the Company was approved by a
vote of 66 2/3% of the directors then still in office which 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 of the Company then in office; (iii) any
sale, lease, exchange or other transfer (in one transaction or a series of
related transactions) of all, or substantially all, the assets of the Company to
any person or entity or group (as so defined) of persons or entities (other than
any wholly owned Subsidiary of the Company); (iv) the merger or consolidation of
the Company with or into an other corporation or the merger of another
corporation into the Company with the effect that immediately after such
transaction any person or entity or group (as so defined) of persons or entities
shall have become the beneficial owner of securities of the surviving
corporation of such merger or consolidation representing a majority of the
combined voting power of the outstanding securities of the surviving corporation
ordinarily having the right to vote in the election of directors; or (v) the
adoption of a plan leading to the liquidation or dissolution of the Company.
 
     The term "CLOSING DATE" shall mean the date on which the Notes are
originally issued under this Indenture.
 
     The term "COMMON STOCK" of any Person shall mean 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.
 
     The term "COMPANY" shall mean Metrocall, Inc. and, subject to the
provisions of Article Five hereof, shall also include its successors and
assigns.
 
                                        2
<PAGE>   10
 
     The term "CONSOLIDATED CASH FLOW" of any Person shall mean for any period
the Consolidated Net Income of such Person for such period plus (i) Consolidated
Interest Expense of such Person for such period, plus (ii) the consolidated
income tax expense of such Person and its consolidated Subsidiaries for such
period, plus (iii) the consolidated depreciation and amortization expense
included in the income statement of such Person and its consolidated
Subsidiaries for such period, plus (iv) other non-cash charges reducing
Consolidated Net Income for such period (excluding any such non-cash charge to
the extent that it represents an accrual of or reserve for cash charges in any
future period), minus (v) non-cash items increasing Consolidated Net Income for
such period. Notwithstanding the foregoing, the provision for taxes on the
income or profits of, and the depreciation and amortization and other non-cash
charges of, a Subsidiary of the referent Person shall be added to Consolidated
Net Income to compute Consolidated Cash Flow only to the extent (and in the same
proportion) that the net income of such Subsidiary was included in calculating
the Consolidated Net Income of such Person and only if and to the extent such
Subsidiary could have paid such amount at the date of determination as a
dividend to the Company by such Subsidiary without prior governmental approval
(that has not been obtained), pursuant to the terms of its charter and all
agreements, instruments, judgments, decrees, orders, statutes, rules and
governmental regulations applicable to that Subsidiary or its stockholders.
 
     The term "CONSOLIDATED FIXED CHARGES" of any Person shall mean for any
period (i) Consolidated Interest Expense of such Person plus (ii) Preferred
Stock dividends declared and payable in cash or in kind in such period (or
accrued in such period, whether or not declared and payable, in the case of
cumulative Preferred Stock) by such Person or any of its consolidated
Subsidiaries, other than any such dividends payable only in shares of Common
Stock or options, warrants or other rights to purchase or acquire Common Stock,
or payable by a Subsidiary of such Person to such Person or one of its wholly
owned Subsidiaries.
 
     The term "CONSOLIDATED INTEREST EXPENSE" of any Person shall mean for any
period the consolidated interest expense included in a consolidated income
statement (without deduction of interest income) of such Person and its
consolidated Subsidiaries for such period determined in accordance with GAAP,
including without limitation or duplication (or, to the extent not so included,
with the addition of), (i) the amortization of Debt discounts; (ii) any payments
of fees with respect to letters of credit, bankers' acceptances or similar
facilities; (iii) fees with respect to interest rate swap or similar agreements
or foreign currency hedge, exchange or similar agreements, other than fees or
charges related to the acquisition or termination thereof which are not
allocable to interest expense in accordance with GAAP; and (iv) the interest
component associated with Capital Lease Obligations.
 
     The term "CONSOLIDATED NET INCOME" of any Person shall mean for any period
the net income (or loss) of such Person and its Subsidiaries for such period,
determined on a consolidated basis in accordance with GAAP; PROVIDED, that there
shall be excluded therefrom (i) the net income (but not the net loss) of any
Subsidiary of such Person which is subject to restrictions which prevent the
payment of dividends and the making of distributions (by loans, advances,
intercompany transfers or otherwise) to such Person except to the extent of the
amount of dividends or other distributions actually paid to such Person by such
Subsidiary without violation of any such restrictions, (ii) the net income (or
loss) of any Person that is not a consolidated Subsidiary of such Person except
to the extent of the amount of dividends or other distributions actually paid to
such Person by such other Person during such period, (iii) any gain or loss on
any Asset Disposition by such Person or any of its Subsidiaries and (iv) any
extraordinary gain or loss.
 
     The term "CORPORATE TRUST OFFICE" shall mean the principal corporate trust
office of the Trustee at which, at any particular time, its corporate trust
business shall be administered, which office at the date of execution of this
Indenture is located at 901 East Cary Street, 2nd Floor, Richmond, Virginia
23219.
 
     The term "CREDIT FACILITY" shall mean the Amended and Restated Loan
Agreement dated as of September 20, 1996, and amended on April 30, 1997, August
11, 1997 and October 16, 1997, among the Company, certain lenders and Toronto
Dominion (Texas), Inc., as administrative agent for the lenders, providing for a
senior secured credit facility, as the same may be amended (including any
amendment and
 
                                        3
<PAGE>   11
 
restatement thereof), modified, supplemented, extended, renewed, restated,
refunded, refinanced, restructured or replaced from time to time.
 
     The term "DEBT" shall mean (without duplication), with respect to any
Person, whether recourse is to all or a portion of the assets of such Person,
and whether or not contingent, (i) every obligation of such Person for money
borrowed, (ii) every obligation of such Person evidenced by bonds, debentures,
notes or other similar instruments, (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
(but excluding trade accounts payable or accrued liabilities arising in the
ordinary course of business), (v) every Capital Lease Obligation of such Person,
(vi) Attributable Debt of such Person, (vii) the maximum fixed redemption or
repurchase price of Redeemable Stock of such Person at the time of
determination, (viii) every obligation of another Person secured by a Lien on
any asset of such Person (whether or not such obligation is assumed by such
Person), PROVIDED, HOWEVER, that, unless such Debt constitutes Debt of the
referent Person pursuant to any other clause of this definition, the amount of
such Debt shall be the lesser of (A) the fair market value of such asset and (B)
the amount of such Debt 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 or for which
such Person is responsible or liable, directly or indirectly, as obligor,
Guarantor or otherwise.
 
     The term "DEFAULT" shall mean any event which is, or after notice or
passage of time (as provided in this Indenture), or both, would be, an Event of
Default.
 
     The term "DEPOSITARY" shall mean The Depository Trust Company, its
nominees, and their respective successors, until a successor Depositary shall
have become such pursuant to the applicable provisions of this Indenture, and
thereafter "Depositary" shall mean or include each Person who is then a
Depositary hereunder.
 
     The term "DESIGNATED SENIOR DEBT" shall mean any Senior Debt (other than
under the Credit Facility) in an original principal amount or committed amount
of not less than $50 million where the instrument governing such Senior Debt
expressly states that such Debt is "Designated Senior Debt" for purposes of this
Indenture and a Resolution of the Board of Directors setting forth such
designation by the Company has been filed with the Trustee.
 
     The term "EUROCLEAR" shall have the meaning provided in Section 2.1.
 
     The term "EVENT OF DEFAULT" shall have the meaning specified in Section
6.1.
 
     The term "EXCHANGE ACT" shall mean the Securities Exchange Act of 1934, as
amended.
 
     The term "EXCHANGE NOTES" shall mean Notes that have been registered under
the Securities Act and that are issued and exchanged for Notes pursuant to the
Registration Rights Agreement and this Indenture.
 
     The term "GAAP" shall mean generally accepted accounting principles set
forth in the opinions and pronouncements of the Accounting Principles Board of
the American Institute of Certified Public Accountants and statements and
pronouncements of the Financial Accounting Standards Board or in such other
statements by such other entity as may be approved by a significant segment of
the accounting profession of the United States, as in effect on the date on
which the Notes are first authenticated and delivered under this Indenture.
 
     The term "GLOBAL NOTES" shall have the meaning provided in Section 2.1.
 
     The term "GUARANTY" by any Person shall mean any obligation, contingent or
otherwise, of such Person guaranteeing or having the economic effect of
guaranteeing any Debt of any other Person (the "primary obligor") in any manner,
whether directly or indirectly, and including, without limitation, any
obligation of such Person (i) to purchase or pay (or advance or supply funds for
the purchase or payment of) such Debt or to purchase (or to advance or supply
funds for the purchase of) any security for the payment of
 
                                        4
<PAGE>   12
 
such Debt, (ii) to purchase property, securities or services for the purpose of
assuring the holder of such Debt of the payment of such Debt, or (iii) to
maintain working capital, equity capital or other financial condition or
liquidity of the primary obligor so as to enable the primary obligor to pay such
Debt (and "Guarantee," "Guaranteeing" and "Guarantor" shall have meanings
correlative to the foregoing); PROVIDED, HOWEVER, that the Guaranty by any
Person shall not include endorsements by such Person for collection or deposit,
in either case, in the ordinary course of business.
 
     The term "HOLDER," "HOLDER OF NOTES" or other similar terms, shall mean the
person in whose name a particular Note shall be registered on the books of the
Company kept for that purpose in accordance with the terms hereof, and the word
"majority," used in connection with the terms "Holder," "Holder of Notes," or
other similar terms, shall signify the "majority in principal amount" whether or
not so expressed.
 
     The term "INCUR" shall mean, 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, or the recording, as required pursuant to GAAP or otherwise, of any
such Debt or other obligation on the balance sheet of such Person (and
"Incurrence," "Incurred," "Incurrable" and "Incurring" have meanings correlative
to the foregoing); PROVIDED, HOWEVER, that a change in GAAP that results in an
obligation of such Person that exists at such time becoming Debt shall not be
deemed an Incurrence of such Debt.
 
     The term "INDENTURE" shall mean this instrument as originally executed or,
if amended or supplemented as herein provided, as so amended or supplemented.
 
     The term "INSTITUTIONAL ACCREDITED INVESTOR" shall mean an institution that
is an "accredited investor" as that term is defined in Rule 501(a)(1), (2), (3)
or (7) under the Securities Act.
 
     The term "INTERNAL REVENUE CODE" shall mean the Internal Revenue Code of
1986, as amended from time to time hereafter, or any successor federal income
tax laws.
 
     The term "LIEN" shall mean, with respect to any property or assets, any
mortgage or deed of trust, pledge, security interest, lien, charge, encumbrance
of any kind in respect of such properties or assets or other security agreement
(including, without limitation, any conditional sale or other title retention
agreement having substantially the same economic effect as any of the
foregoing).
 
     The term "MATURITY" when used with respect to any Note, shall mean the date
on which the principal of such Note or an installment of principal becomes due
and payable as therein or herein provided, whether at Stated Maturity or by
declaration of acceleration, call for redemption or otherwise.
 
     The term "NET AVAILABLE PROCEEDS" from any Asset Disposition by any Person
shall mean cash or readily marketable cash equivalents received (including by
way of sale or discounting of a note, installment receivable or other
receivable, but excluding any other consideration received in the form of
assumption by the acquiree of Debt or other obligations relating to such
properties or assets or received in any other non-cash form) therefrom by such
Person, net of (i) all legal, title and recording tax expenses, commissions and
other fees and expenses incurred and all federal, state, provincial, foreign and
local taxes 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 the assets subject to such Asset Disposition in
accordance with the terms of any Lien upon or with respect to such assets or
which must by the terms of such Lien, or in order to obtain a necessary consent
to such Asset Disposition or by applicable law, be repaid out of the proceeds
from such Asset Disposition, (iii) all distributions and other payments made to
minority interest holders in Subsidiaries of such Person or joint ventures as a
result of such Asset Disposition and (iv) a reasonable reserve for the after-tax
costs of any indemnification payments (fixed or contingent) attributable to the
seller's indemnities to the purchaser undertaken by the Company or any of its
Subsidiaries in connection with such Asset Disposition.
 
     The term "NOTES" shall mean the 9 3/4% Senior Subordinated Notes due 2007
that are issued under this Indenture.
 
     The term "NOTEHOLDER" means a Holder of one or more Notes.
 
                                        5
<PAGE>   13
 
     The term "OFFICER" shall mean any of the Chairman of the Board of
Directors, the Chief Executive Officer, the President, any Executive Vice
President, the Chief Financial Officer, the Treasurer or the Secretary or
Assistant Secretary of the Company.
 
     The term "OFFICERS' CERTIFICATE" shall mean a certificate signed by two
Officers or by an Officer and an Assistant Treasurer of the Company complying
with the applicable provisions of Sections 12.4 and 12.5 hereof.
 
     The term "OFFSHORE GLOBAL NOTE" shall have the meaning provided in Section
2.1.
 
     The term "OFFSHORE PHYSICAL NOTE" shall have the meaning provided in
Section 2.1.
 
     The term "OPINION OF COUNSEL" shall mean, with respect to any Person, an
opinion in writing signed by legal counsel (who may be an employee of or counsel
to such Person) who is reasonably acceptable to the Trustee and, as otherwise
contemplated hereby, the Company, complying with the applicable provisions of
Sections 12.4 and 12.5 hereof.
 
     The term "PERMITTED LIENS" means: (i) Liens incurred and pledges and
deposits made in the ordinary course of business in connection with liability
insurance, workers' compensation, unemployment insurance, old-age pensions, and
other social security benefits other than in respect of employee benefit plans
subject to ERISA; (ii) Liens securing performance, surety, and appeal bonds and
other obligations of like nature incurred in the ordinary course of business;
(iii) Liens on goods and documents securing trade letters of credit; (iv) Liens
imposed by law, such as carriers', warehousemen's, mechanics', materialmen's,
and vendors' liens, incurred in the ordinary course of business and securing
obligations which are not yet due or which are being contested in good faith by
appropriate proceedings; (v) Liens securing the payment of taxes, assessments,
and governmental charges or levies (a) either (1) not delinquent or (2) being
contested in good faith by appropriate legal or administrative proceedings and
(b) as to which adequate reserves shall have been established on the books of
the relevant Person in conformity with GAAP; (vi) zoning restrictions,
easements, rights of way, reciprocal easement agreements, operating agreements,
covenants, conditions, or restrictions on the use of any parcel of property that
are routinely granted in real estate transactions or do not interfere in any
material respect with the ordinary conduct of the business of the Company and
its Subsidiaries or the value of such property for the purpose of such business;
(vii) Liens on property existing at the time such property is acquired and Liens
on the assets of any Subsidiary of the Company at the time such Subsidiary is
acquired, provided such Liens apply only to such acquired property; (viii) Liens
existing as of the date of this Indenture; (ix) Liens securing Debt Incurred for
the purpose of financing all or any part of the cost of acquiring any property,
equipment or other assets (whether by merger, consolidation, purchase of assets
or otherwise), PROVIDED that such Debt is Incurred prior to, at the time of, or
within 60 days after the acquisition of such assets solely for the purpose of
financing the acquisition of such assets in compliance with the provision
described under Section 4.9; (x) any attachment or judgment Lien, unless the
judgment it secures would constitute an Event of Default; (xi) Liens with
respect to assets of a Subsidiary granted by such Subsidiary to the Company to
secure Debt owing to the Company; (xii) rights of banks to set off deposits
against debts owed to said banks; (xiii) any interest or title of a lessor in
property of the Company or a Subsidiary of the Company subject to any
capitalized lease or operating lease, as each are defined under GAAP; (xiv)
other Liens incidental to the conduct of the business of the Company or any of
its Subsidiaries, as the case may be, or the ownership of their assets that do
not materially detract from the value of the property of the Company or a
Subsidiary of the Company subject thereto; (xv) Liens securing Refinancing Debt,
PROVIDED that such Liens only extend to the property or assets securing the Debt
being refinanced, such refinanced Debt was previously secured by similar Liens
on such property or assets and the Debt (or other obligations) secured by such
Liens is not increased; and (xvi) Liens in addition to the foregoing securing
Debt not to exceed $500,000 in the aggregate outstanding at any time.
 
     The term "PERMITTED STOCK REPURCHASE" shall mean, with respect to the
Company, the purchase or redemption for fair market value (as determined by a
majority of the Board of Directors of the Company, including a majority of the
independent, disinterested directors and evidenced by a resolution of the Board
of Directors of the Company) of shares of Capital Stock of the Company
(including stock appreciation rights and similar securities) held by any present
or former officer of the Company or by an employee stock
 
                                        6
<PAGE>   14
 
ownership plan or similar trust for the account of such present or former
officer upon such person's death, disability, retirement or termination of
employment or under the terms of any such plan or any other agreement under
which such shares were originally issued.
 
     The term "PERSON" shall mean an individual, partnership, corporation,
limited liability company, trust or unincorporated organization, and a
government or agency or political subdivision thereof.
 
     The term "PHYSICAL NOTES" shall have the meaning provided in Section 2.1.
 
     The term "PREFERRED STOCK," as applied to the Capital Stock of any Person,
shall mean 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.
 
     The term "PRIVATE PLACEMENT LEGEND" shall mean the legend initially set
forth on the Notes in the form set forth in Section 2.2.
 
     The term "PRO FORMA CONSOLIDATED CASH FLOW" of any Person shall mean for
any period the Consolidated Cash Flow of such Person for such period calculated
on a pro forma basis to give effect to any Asset Disposition or acquisition of
assets not in the ordinary course of business (including acquisitions of other
Persons by merger, consolidation or purchase of Capital Stock) during such
period or any subsequent period as if such Asset Disposition or acquisition had
taken place on the first day of such period.
 
     The term "QIB" shall mean a "qualified institutional buyer" as defined in
Rule 144A.
 
     The term "REDEEMABLE STOCK" shall mean any equity security that by its
terms or otherwise is required to be redeemed prior to the Stated Maturity of
the Notes, or is redeemable at the option of the holder thereof at any time
prior to the Stated Maturity of the Notes.
 
     The term "REDEMPTION DATE", when used with respect to any Note to be
redeemed or repurchased, shall mean the date fixed for such redemption or
repurchase by or pursuant to this Indenture.
 
     The term "REDEMPTION PRICE" shall mean the amount payable for the
redemption or repurchase of any Note on the Redemption Date, and shall always
include interest accrued and unpaid to the Redemption Date, unless otherwise
specifically provided.
 
     The term "REFINANCING DEBT" shall mean (i) any Debt of the Company that
renews, refunds or extends any outstanding Debt of the Company or a Subsidiary
of the Company which Debt was Incurred in compliance with this Indenture (other
than Debt Incurred under the Credit Facility or in connection therewith), and
(ii) any Debt of a Subsidiary of the Company that renews, refunds or extends any
Debt of such Subsidiary which Debt was Incurred in compliance with this
Indenture (other than Guarantees of Debt Incurred under the Credit Facility or
in connection therewith), in any case in an amount not to exceed the outstanding
principal amount 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 refinanced or the amount of any premium reasonably determined by the
Company as necessary to accomplish such refinancing by means of a tender offer
or privately negotiated repurchase, plus the expenses of the Company Incurred in
connection with such refinancing, PROVIDED that, (A) in the case of any
refinancing of the Notes or any pari passu Debt, such Refinancing Debt is made
pari passu or subordinate in right of payment to the Notes, (B) in the case of
any refinancing of Debt that is subordinate in right of payment to the Notes,
such Refinancing Debt is made subordinate in right of payment to the Notes to
the same extent as the Debt refinanced thereby, and (C) such Refinancing Debt
has a final maturity date not earlier than the final maturity date of, and has a
Weighted Average Life to Maturity equal to or greater than the Weighted Average
Life to Maturity of, the Debt being renewed, refunded or extended.
 
     The term "REGISTRATION RIGHTS AGREEMENT" shall mean the Registration Rights
Agreement, dated as of October 21, 1997 among the Company and Morgan Stanley &
Co. Incorporated, TD Securities (USA) Inc., First Union Capital Markets Corp.
and NationsBanc Montgomery Securities, Inc.
 
                                        7
<PAGE>   15
 
     The term "REGISTRATION STATEMENT" shall mean the Registration Statement as
defined and described in the Registration Rights Agreement.
 
     The term "REGULATION S" shall mean Regulation S under the Securities Act.
 
     The term "RELATED PERSON" shall mean any Person owning (i) 5% or more of
the outstanding Common Stock of the Company or a Subsidiary of the Company or
(ii) 5% or more of the Voting Stock of the Company or a Subsidiary of the
Company.
 
     The term "RESPONSIBLE OFFICER" shall mean any officer of the Trustee with
direct responsibility for the administration of this Indenture or who is
otherwise exercising judgment with respect to this Indenture.
 
     The term "RULE 144A" shall mean Rule 144A under the Securities Act.
 
     The term "SECURITIES ACT" shall mean the Securities Act of 1933, as
amended.
 
     The term "SENIOR DEBT" shall mean (i) the principal of, premium, if any,
and interest (including interest accruing on or after the filing of any petition
in bankruptcy or for reorganization relating to the Company whether or not such
claim for post-petition interest is allowed in such proceeding) on, penalties
and any obligation of the Company for reimbursement, indemnities and fees
relating to, Debt outstanding pursuant to the Credit Facility, (ii) all other
debt of the Company referred to in the definition of Debt other than clauses
(vii) and (ix) (with respect to clause (vii) of such definition) thereof, (iii)
payment obligations of the Company under interest rate swap or similar
agreements or foreign currency hedge, exchange or similar agreements required by
the Credit Facility, where the counterparty to such agreement is a lender under
the Credit Facility, and (iv) all renewals, extensions, modifications,
refinancings, refundings and amendments of any Debt or payment obligations
referred to in clause (i), (ii), or (iii) above (including, without limitation,
any interest rate swap or similar agreements or foreign currency hedge, exchange
or similar agreements that are entered into by the Company for the purpose of
modifying, terminating or hedging any agreement that constitutes Senior Debt
under clause (iii) above whether or not such modification, termination or hedge
was required by the Credit Facility and whether or not the counterparty to such
agreement is a lender or former lender under such Credit Facility), unless, in
the case of any particular Debt referred to above, (a) such Debt is owed to a
Subsidiary of the Company, (b) the instrument creating or evidencing the same or
pursuant to which the same is outstanding expressly provides that such Debt is
not superior in right of payment to the Notes, (c) such Debt is Incurred in
violation of the Indenture, or (d) such Debt is by its terms subordinate in
right of payment in respect of any other Debt of the Company.
 
     The term "SENIOR REPRESENTATIVE" shall mean any trustee, agent or
representative, if any, for the holders of any Designated Senior Debt.
 
     The term "STATED MATURITY" when used with respect to any security or Debt,
or any installment of interest thereon, shall mean the date specified in such
security or the instrument relating to such Debt as the fixed date on which the
principal of such security or Debt or such installment of interest is due and
payable.
 
     The term "SUBSIDIARY" of any Person shall mean (i) a corporation more than
50% 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 other Subsidiaries thereof or (ii) any other Person
(other than a corporation) in which such Person, or one or more other
Subsidiaries of such Person or such Person and one or more other Subsidiaries
thereof, directly or indirectly, has at least a majority ownership and power to
direct the policies, management and affairs thereof, PROVIDED, that an
Unrestricted Subsidiary shall not be deemed to be a Subsidiary of the Company
for purposes of this Indenture.
 
                                        8
<PAGE>   16
 
     The term "TIA" or "TRUST INDENTURE ACT" shall mean the Trust Indenture Act
of 1939 as in effect on the date on which this Indenture is qualified under the
TIA, except as provided in Section 9.3 hereof and except to the extent any
amendment to the TIA retroactively applies to this Indenture.
 
     The term "TRANSFER AGENT" shall mean any Person, which may be the Company,
authorized by the Company to exchange or register the transfer of Notes.
 
     The term "TRUSTEE" shall mean the Person identified as the Trustee in the
recitals of this Indenture, or any successor appointed pursuant to this
Indenture.
 
     The term "UNRESTRICTED SUBSIDIARY" shall mean (i) any Subsidiary of the
Company which at the time of determination shall be an Unrestricted Subsidiary
(as designated by the Board of Directors of the Company, as provided below) and
(ii) any Subsidiary of an Unrestricted Subsidiary. The Board of Directors of the
Company may designate any Subsidiary of the Company (other than as provided
below but including any newly acquired or newly formed Subsidiary) to be an
Unrestricted Subsidiary unless such Subsidiary owns any Capital Stock of, or
owns or holds any Lien on any property of, any other Subsidiary of the Company
which is not a Subsidiary of the Subsidiary to be so designated or otherwise an
Unrestricted Subsidiary, PROVIDED, that (a) either (x) the Subsidiary to be so
designated has total assets of $10,000 or less or (y) immediately after giving
effect to such designation, the Company could Incur $1.00 of additional Debt
pursuant to the first paragraph of Section 4.9 and (b) immediately after giving
effect to such designation, the Company could make an additional Restricted
Payment of $1.00 pursuant to the first paragraph of Section 4.11; PROVIDED, that
the holders of Debt thereof do not have direct or indirect recourse against the
Company or any Subsidiary of the Company and neither the Company nor any
Subsidiary of the Company otherwise has liability, for any payment obligations
in respect of such Debt. The Board of Directors of the Company may designate any
Unrestricted Subsidiary to be a Subsidiary, PROVIDED, that immediately after
giving effect to such designation, the Company could Incur $1.00 of additional
Debt pursuant to the first paragraph of Section 4.9.
 
     The term "U.S. GLOBAL NOTES" shall have the meaning provided in Section
2.1.
 
     The term "U.S. GOVERNMENT OBLIGATIONS" shall mean securities which are (i)
direct obligations of the United States of America for the payment of which its
full faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by, and acting as an agency or instrumentality, of the United States
of America the payment of which is unconditionally guaranteed as a full faith
and credit obligation by the United States of America, which, in either case,
are not callable or redeemable at the option of the issuer thereof, and shall
also include a depository receipt issued by a bank or trust company as custodian
with respect to any such U.S. Government Obligations or a specific payment of
interest on or principal of any such U.S. Government Obligations held by such
custodian for the account of the holder of a depository receipt, PROVIDED that
(except as required by law) such custodian is not authorized to make any
deduction from the amount payable to the holder of such depository receipt from
any amount received by the custodian in respect of the U.S. Government
Obligations or the specific payment of interest on or principal of the U.S.
Government Obligations evidenced by such depository receipt.
 
     The term "U.S. PHYSICAL NOTES" shall have the meaning provided in Section
2.1.
 
     The term "VOTING STOCK" of any Person means Capital Stock of such Person
which ordinarily has voting power for the election of directors (or persons
performing similar functions) of such Person, whether at all times or only so
long as no senior class of securities has such voting power by reason of any
contingency.
 
     The term "WEIGHTED AVERAGE LIFE TO MATURITY" shall mean, when applied to
any Debt at any date, the number of years obtained by dividing (i) the sum of
the products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such Debt.
 
                                        9
<PAGE>   17
 
     SECTION 1.2.  Other Definitions.
 
<TABLE>
<CAPTION>
                                    TERM                                        DEFINED IN SECTION
- -----------------------------------------------------------------------------   ------------------
<S>                                                                             <C>
"Acceleration Due to Blockage"...............................................           6.2
"Act"........................................................................           1.5
"Blockage Period"............................................................          11.2
"Change of Control Offer"....................................................           4.17
"Commission".................................................................           4.7
"covenant defeasance"........................................................           8.1
"Events of Default"..........................................................           6.1
"Indemnification Agreements".................................................           4.14
"legal defeasance"...........................................................           8.1
"pari passu Debt"............................................................           4.15
"Paying Agent"...............................................................           2.4
"Registrar"..................................................................           2.4
"Repurchase Date"............................................................           4.17
"Required Filing Dates"......................................................           4.7
"Restricted Payment".........................................................           4.11
"Senior Nonmonetary Default".................................................          11.2
"Senior Payment Default".....................................................          11.2
"Surviving Entity"...........................................................           5.2
</TABLE>
 
     SECTION 1.3.  Incorporation by Reference of Trust Indenture Act.
 
     Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.
 
     The following TIA terms used in this Indenture have the following meanings:
 
          "INDENTURE SECURITIES" means the Notes;
          "INDENTURE SECURITYHOLDER" means a Noteholder;
          "INDENTURE TO BE QUALIFIED" means this Indenture;
          "INDENTURE TRUSTEE" or "INSTITUTIONAL TRUSTEE" means the Trustee; and
          "OBLIGOR" on the Notes means the Company, any other obligor upon the
     Notes or any successor obligor upon the Notes.
 
     All other terms used in this Indenture that are defined by the TIA, defined
by TIA reference to another statute or defined by Commission rule under the TIA
have the meanings so assigned to them.
 
     SECTION 1.4.  Rules of Construction.
 
     Unless the context otherwise requires: (1) a term has the meaning assigned
to it; (2) an accounting term not otherwise defined has the meaning assigned to
it in accordance with GAAP; (3) "or" is not exclusive; (4) words in the singular
include the plural, and words in the plural include the singular; and (5)
provisions apply to successive events and transactions.
 
     SECTION 1.5.  Acts of Holders.
 
     (1) Meetings of Noteholders shall be conducted in accordance with Article
10 hereof. Any other 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 an agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required, to the Company.
Actions taken at meetings pursuant to Article 10 hereof and such instrument or
instruments (and the action embodied therein and evidenced thereby) are herein
sometimes referred to as the "Act" of Holders signing such instrument or
instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be
 
                                       10
<PAGE>   18
 
sufficient for any purpose of this Indenture and (subject to Section 7.1 hereof)
conclusive in favor of the Trustee and the Company, if made in the manner
provided in this Section 1.5.
 
     (2) 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
the 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 or her the execution thereof. Where such
execution is by an officer of a corporation or a member of a partnership, on
behalf of such corporation or partnership, such certificate or affidavit shall
also constitute sufficient proof of his or her authority.
 
     (3) The ownership of Notes shall be proved by the register maintained by
the Registrar.
 
     (4) Subject to the provisions of Section 9.4, any request, demand,
authorization, direction, notice, consent, waiver or other Act of the Holder of
any Note shall bind every future Holder of the same Note and the Holder of every
Note issued upon the registration of transfer thereof or in exchange therefor or
in lieu thereof in respect of anything done, omitted or suffered to be done by
the Trustee or the Company in reliance thereon, whether or not notation of such
action is made upon such Note. However, any such Holder or subsequent Holder may
revoke the request, demand, authorization, direction, notice, consent, waiver or
other Act as to his or her Note or portion thereof if the Trustee receives
written notice of revocation before the date such Act becomes effective.
 
                                   ARTICLE 2
 
                                   THE NOTES
 
     SECTION 2.1.  Form and Dating.
 
     The Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A. The Notes may have notations, legends or
endorsements required by law, stock exchange rule or usage, in addition to those
set forth in Exhibit A. The Company shall approve the form of the Notes and any
notation, legend or endorsement on the Notes. Each Note shall be dated the date
of its authentication. The Notes shall be issuable only in registered form,
without coupons, in denominations of $1,000 in principal amount or any integral
multiple thereof.
 
     The terms and provisions contained in the Notes shall constitute, and are
hereby expressly made, a part of this Indenture and, to the extent applicable,
the Company and the Trustee, by their execution and delivery of this Indenture,
expressly agree to such terms and provisions and to be bound thereby.
 
     Notes offered and sold in reliance on Rule 144A shall be issued initially
in the form of one or more permanent global Notes in definitive, fully
registered form without interest coupons, substantially in the form set forth in
Exhibit A (the "U.S. Global Notes"), deposited with the Trustee, as custodian
for, and registered in the name of a nominee of, the Depositary, duly executed
by the Company and authenticated by the Trustee as hereinafter provided. The
aggregate principal amount of U.S. Global Notes may from time to time be
increased or decreased by adjustments made on the records of the Trustee, as
custodian for the Depositary or its nominee, as hereinafter provided.
 
     Notes offered and sold in offshore transactions in reliance on Regulation S
shall be issued initially in the form of one or more permanent global Notes in
fully registered form without interest coupons, substantially in the form set
forth in Exhibit A (the "Offshore Global Notes"), deposited with the Trustee, as
custodian for, and registered in the name of a nominee of, the Depositary for
the accounts of the Euroclear System ("Euroclear") and Cedel Bank Societe
Anonyme ("Cedel Bank"), duly executed by the Company and authenticated by the
Trustee as hereinafter provided. The aggregate principal amount of the Offshore
Global Notes may from time to time be increased or decreased by adjustments made
on the records of the Trustee, as custodian for the Depositary or its nominee,
as hereinafter provided.
 
     Notes offered and sold in reliance on Regulation D under the Securities Act
shall be issued in the form of permanent certificated Notes in fully registered
form without interest coupons in substantially the form set
 
                                       11
<PAGE>   19
 
forth in Exhibit A (the "U.S. Physical Notes"). Notes issued pursuant to Section
2.8 in exchange for interests in the Offshore Global Notes shall be in the form
of permanent certificated Notes in fully registered form substantially in the
form set forth in Exhibit A (the "Offshore Physical Notes").
 
     The Offshore Physical Notes and U.S. Physical Notes are sometimes
collectively herein referred to as the "Physical Notes." The U.S. Global Note
and the Offshore Global Note are sometimes referred to herein as the "Global
Notes."
 
     The definitive Notes shall be typed, printed, lithographed or engraved or
produced by any combination of these methods or may be produced in any other
manner permitted by the rules of any securities exchange on which the Notes may
be listed, all as determined by the Officers executing such Notes, as evidenced
by their execution of such Notes.
 
     SECTION 2.2.  Restrictive Legends.  Unless and until a Note is exchanged
for an Exchange Note in connection with an effective Registration Statement
pursuant to the Registration Rights Agreement, (i) each U.S. Global Note and
each U.S. Physical Note shall bear the legend set forth below on the face
thereof and (ii) each Offshore Physical Note and each Offshore Global Note shall
bear the legend set forth below on the face thereof until at least the 41st day
after the Closing Date and receipt by the Company and the Trustee of a
certificate substantially in the form of Exhibit B hereto.
 
        THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933,
        AS AMENDED (THE "SECURITIES ACT"), AND ACCORDINGLY, MAY NOT BE OFFERED
        OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT
        OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS
        ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A
        "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE
        SECURITIES ACT) OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS
        DEFINED IN RULE 501(a)(1), (2), (3) OR (7) OF REGULATION D UNDER THE
        SECURITIES ACT) (AN "INSTITUTIONAL ACCREDITED INVESTOR") OR (C) IT IS
        NOT A U.S. PERSON AND IS ACQUIRING THIS NOTE IN AN OFFSHORE TRANSACTION
        IN COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT, (2) AGREES
        THAT IT WILL NOT, WITHIN THE TIME PERIOD REFERRED TO IN RULE 144(k)
        UNDER THE SECURITIES ACT AS IN EFFECT ON THE DATE OF TRANSFER OF SUCH
        NOTE RESELL OR OTHERWISE TRANSFER THIS NOTE EXCEPT (A) TO METROCALL,
        INC. OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER
        IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) INSIDE THE
        UNITED STATES TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO
        SUCH TRANSFER, FURNISHES TO THE TRUSTEE A SIGNED LETTER CONTAINING
        CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON
        TRANSFER OF THIS NOTE (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM THE
        TRUSTEE) AND IF SUCH TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL
        AMOUNT OF NOTES OF LESS THAN $100,000, AN OPINION OF COUNSEL ACCEPTABLE
        TO METROCALL, INC. THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE
        SECURITIES ACT, (D) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION
        IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT, (E) PURSUANT TO
        THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE
        SECURITIES ACT (IF AVAILABLE) OR (F) PURSUANT TO AN EFFECTIVE
        REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT
        WILL DELIVER TO EACH PERSON TO WHOM THIS NOTE IS TRANSFERRED A NOTICE
        SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY
        TRANSFER OF THIS NOTE WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE
        HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF
        RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO
        THE TRUSTEE. IF THE PROPOSED
 
                                       12
<PAGE>   20
 
        TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR, THE HOLDER MUST,
        PRIOR TO SUCH TRANSFER, FURNISH TO THE TRUSTEE AND METROCALL, INC. SUCH
        CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS EITHER OF THEM
        MAY REASONABLY REQUIRE 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. AS USED HEREIN, THE
        TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE
        MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT. THE
        INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO REFUSE TO
        REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE FOREGOING
        RESTRICTIONS.
 
     Each Global Note, whether or not an Exchange Note, shall also bear the
following legend on the face thereof:
 
        UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
        DEPOSITORY TRUST COMPANY TO METROCALL, INC. OR ITS AGENT FOR
        REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
        ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS
        IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
        COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER
        ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY
        TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
        OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER
        HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.
 
        TRANSFERS OF THIS NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT
        IN PART, TO NOMINEES OF CEDE & CO. OR TO A SUCCESSOR THEREOF OR SUCH
        SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS NOTE SHALL BE
        LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH
        IN SECTION 2.9 OF THE INDENTURE.
 
     SECTION 2.3.  Execution and Authentication.
 
     Two Officers (each of whom shall have been duly authorized by all requisite
corporate actions) shall sign the Notes for the Company by manual or facsimile
signature. The Company's seal shall be reproduced on the Notes.
 
     If an Officer whose signature is on a Note no longer holds that office at
the time the Note is authenticated, the Note shall nevertheless be valid.
 
     A Note shall not be valid until authenticated by the manual signature of
the Trustee. The signature shall be conclusive evidence that the Note has been
authenticated under this Indenture.
 
     The Trustee shall authenticate Notes for original issue in the aggregate
principal amount of $200.0 million upon a written order of the Company executed
by two Officers. The written order shall specify the amount and type of Notes to
be authenticated and the date on which the original issue of Notes is to be
authenticated and the legends, if any, to be placed on the Notes. The aggregate
principal amount of Notes outstanding at any time may not exceed $200.0 million
except as provided in Section 2.11 hereof.
 
     The Trustee may appoint an authenticating agent reasonably acceptable to
the Company to authenticate Notes. An authenticating agent may authenticate
Notes whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent.
 
                                       13
<PAGE>   21
 
     SECTION 2.4.  Registrar and Paying Agent.
 
     The Company shall maintain an office or agency in the Borough of Manhattan,
The City of New York and, in the event the Notes are listed on the Luxembourg
Stock Exchange, in Luxembourg where (a) Notes may be presented or surrendered
for registration of transfer or for exchange ("Registrar"), (b) Notes may be
presented or surrendered for payment ("Paying Agent") and (c) notices and
demands in respect of the Notes and this Indenture may be served. The Company
may serve as the Agent referred to in clause (a), (b) or (c) above. The
Registrar shall keep a register of the Notes and of their transfer and exchange.
The Company, upon notice to and approval of the Trustee, may appoint one or more
co-registrars and one or more additional paying agents. The term "Paying Agent"
includes any additional paying agent reasonably acceptable to the Trustee. The
term "Registrar" includes any appointed co-registrar. The Company initially
appoints the Trustee as Registrar and Paying Agent and agent to receive notices
and demands in respect of the Notes until such time as the Trustee has resigned
or a successor has been appointed.
 
     The Company shall enter into an appropriate agency agreement with any Agent
not a party to this Indenture, which agreement shall implement the provisions of
this Indenture that relate to such Agent. The Company shall notify the Trustee,
in advance, of the name and address of any such Agent not a party to this
Indenture. If the Company fails to appoint or maintain another entity as
Registrar or Paying Agent, the Trustee shall act as such.
 
     SECTION 2.5.  Paying Agent to Hold Money in Trust.
 
     The Company shall require each Paying Agent other than the Trustee to agree
in writing that the Paying Agent will hold in trust for the benefit of
Noteholders or the Trustee all money held by the Paying Agent for the payment of
principal of, premium, if any, or interest on, the Notes (whether such money has
been distributed to it by the Company or any other obligor on the Notes), and
will notify the Trustee in writing of any Default by the Company (or any other
obligor upon the Notes) in making any such payment. If the Company or a
Subsidiary acts as Paying Agent, it shall segregate such money and hold it as a
separate trust fund. While any such Default continues, the Trustee may require a
Paying Agent to pay all such money held by it to the Trustee. The Company (or
any other obligor upon the Notes) at any time may require a Paying Agent to pay
all such money held by it to the Trustee. Upon such payment to the Trustee, the
Paying Agent (if other than the Company, a Subsidiary or any other obligor upon
the Notes) shall have no further liability for such money.
 
     SECTION 2.6.  Noteholder Lists.
 
     The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Noteholders and shall otherwise comply with TIA Section 312(a). If the Trustee
is not the Registrar, the Company (or any other obligor upon the Notes) shall
furnish to the Trustee at least seven Business Days before each interest payment
date (and in all events at intervals of not more than six months) and at such
other times as the Trustee may request in writing a list in such form and as of
such date as the Trustee may reasonably require of the names and addresses of
Noteholders, and the Company shall otherwise comply with TIA Section 312(a).
 
     SECTION 2.7.  Transfer and Exchange.
 
     Where Notes are presented to the Registrar or a co-registrar with a request
to register the transfer of such Notes or exchange them for an equal principal
amount of Notes of other authorized denominations, the Registrar or co-registrar
shall register the transfer or make the exchange if its requirements for such
transactions are met, PROVIDED that any Note presented or surrendered for
registration of transfer or exchange shall be duly endorsed or accompanied by a
written instruction of transfer in form satisfactory to the Registrar or
co-registrar and the Trustee, duly executed by the Holder thereof or his or her
attorney duly authorized in writing. To permit registrations of transfer and
exchanges, the Company shall issue and the Trustee shall authenticate the Notes
at the Registrar's or co-registrar's request. Notwithstanding anything else in
this Section 2.7 to the contrary, no exchanges of Notes for Exchange Notes shall
occur until a Registration Statement shall have been declared effective by the
Commission (confirmed in an Officers' Certificate
 
                                       14
<PAGE>   22
 
delivered to the Trustee) and any Notes that are exchanged for Exchange Notes
shall be cancelled by the Trustee.
 
     The Registrar or co-registrar shall not be required to register the
transfer of or exchange any Note (i) during a period beginning at the opening of
business on a Business Day 15 days before the mailing of a notice of redemption
of Notes and ending at the close of business on the day of such mailing and (ii)
selected for redemption in whole or in part pursuant to Article Three hereof,
except the unredeemed portion of any Note being redeemed in part.
 
     No service charge shall be made for any registration of transfer or
exchange; PROVIDED, HOWEVER, that the Company, Registrar or Trustee, as
appropriate, may require payment of a sum sufficient to pay any taxes or similar
governmental charges that may be imposed in connection with the transfer or
exchange of Notes from the Noteholder requesting such transfer or exchange
(other than any such transfer taxes or similar governmental charges arising
under the laws of the United States or of any State thereof payable upon
transfers or exchanges pursuant to Sections 2.10, 2.13, 3.6, 3.8, 4.17 or 9.5
hereof).
 
     SECTION 2.8.  Book-Entry Provisions for Global Notes.  (a) The U.S. Global
Notes and Offshore Global Notes initially shall (i) be registered in the name of
the Depositary for such Global Notes or the nominee of such Depositary, and,
with respect to Offshore Global Notes, for the accounts of Euroclear and Cedel
Bank, (ii) be delivered to the Trustee as custodian for such Depositary and
(iii) bear legends as set forth in Section 2.2.
 
          Members of, or participants in, the Depositary ("Agent Members") shall
     have no rights under this Indenture with respect to any Global Note held on
     their behalf by the Depositary, or the Trustee as its custodian, or under
     the Global Note, and the Depositary may be treated by the Company, the
     Trustee and any agent of the Company or the Trustee as the absolute owner
     of such Global Note for all purposes whatsoever. Notwithstanding the
     foregoing, nothing herein shall prevent the Company, the Trustee or any
     agent of the Company or the Trustee, from giving effect to any written
     certification, proxy or other authorization furnished by the Depositary or
     impair, as between the Depositary and its Agent Members, the operation of
     customary practices governing the exercise of the rights of a holder of any
     Note.
 
          (b) Transfers of a Global Note shall be limited to transfers of such
     Global Note in whole, but not in part, to the Depositary, its successors or
     their respective nominees. Interests of beneficial owners in a Global Note
     may be transferred in accordance with the rules and procedures of the
     Depositary or, if applicable, those of Euroclear and Cedel Bank, and the
     provisions of Section 2.9. In addition, U.S. Physical Notes and Offshore
     Physical Notes shall be transferred to all beneficial owners in exchange
     for their beneficial interests in the U.S. Global Notes or the Offshore
     Global Notes, respectively, if (i) the Depositary notifies the Company that
     it is unwilling or unable to continue as Depositary for the U.S. Global
     Notes or the Offshore Global Notes, as the case may be, and a successor
     depositary is not appointed by the Company within 90 days of such notice or
     (ii) an Event of Default has occurred and is continuing and the Registrar
     has received a request to the foregoing effect from the Depositary.
 
          (c) Any beneficial interest in one of the Global Notes that is
     transferred to a person who takes delivery in the form of an interest in
     the other Global Note will, upon transfer, cease to be an interest in such
     Global Note and become an interest in the other Global Note and,
     accordingly, will thereafter be subject to all transfer restrictions, if
     any, and other procedures applicable to beneficial interests in such other
     Global Note for as long as it remains such an interest.
 
          (d) In connection with any transfer of a portion of the beneficial
     interests in a U.S. Global Note or Offshore Global Note to beneficial
     owners pursuant to paragraph (b) of this Section, the Registrar shall
     reflect on its books and records the date and a decrease in the principal
     amount of the U.S. Global Notes or Offshore Global Notes in an amount equal
     to the principal amount of the beneficial interest in such Global Notes to
     be transferred, and the Company shall execute, and the Trustee shall
     authenticate and deliver, one or more U.S. Physical Notes or Offshore
     Physical Notes, as the case may be, of like tenor and amount.
 
                                       15
<PAGE>   23
 
          (e) In connection with the transfer of the entire U.S. Global Note or
     Offshore Global Note to beneficial owners pursuant to paragraph (b) of this
     Section, the U.S. Global Note or Offshore Global Note, as the case may be,
     shall be deemed to be surrendered to the Trustee for cancellation, and the
     Company shall execute, and the Trustee shall authenticate and deliver, to
     each beneficial owner identified by the Depositary or, if applicable, by
     Euroclear or Cedel Bank, in exchange for its beneficial interest in the
     U.S. Global Note or Offshore Global Note, as the case may be, an equal
     aggregate principal amount of U.S. Physical Notes or Offshore Physical
     Notes, as the case may be, of authorized denominations.
 
          (f) Any U.S. Physical Note delivered in exchange for an interest in
     the U.S. Global Note pursuant to paragraph (b), (d) or (e) of this Section
     shall, except as otherwise provided by paragraph (e) of Section 2.9, bear
     the legend regarding transfer restrictions applicable to the U.S. Physical
     Note set forth in Section 2.2.
 
          (g) Any Offshore Physical Note delivered in exchange for an interest
     in the Offshore Global Note pursuant to paragraph (b), (d) or (e) of this
     Section shall, except as otherwise provided by paragraph (e) of Section
     2.9, bear the legend regarding transfer restrictions applicable to the
     Offshore Physical Note set forth in Section 2.2.
 
          (h) The registered holder of a Global Note may grant proxies and
     otherwise authorize any person, including Agent Members and persons that
     may hold interests through Agent Members, to take any action which a Holder
     is entitled to take under this Indenture or the Notes.
 
          (i) Beneficial owners of interests in a U.S. Global Note may receive
     U.S. Physical Notes (which shall bear the Private Placement Legend if
     required by Section 2.2) in accordance with the procedures of the
     Depositary. In connection with the execution, authentication and delivery
     of such U.S. Physical Notes, the Registrar shall reflect on its books and
     records a decrease in the principal amount of the relevant U.S. Global Note
     equal to the principal amount of such U.S. Physical Notes and the Company
     shall execute and the Trustee shall authenticate and deliver one or more
     U.S. Physical Notes having an equal aggregate principal amount.
 
          (j) With respect to Offshore Global Notes, investors may hold their
     interests in such Notes directly through Cedel Bank or Euroclear, if they
     are participants in Cedel Bank or Euroclear, or indirectly through
     organizations that are participants in Cedel Bank or Euroclear. On or after
     the 40th day after the Closing Date, investors also may hold their
     interests through organizations other than Cedel Bank or Euroclear that are
     Agent Members. Cedel Bank and Euroclear shall hold interests in Offshore
     Global Notes on behalf of their Agent Members through the Depositary.
 
     SECTION 2.9.  Special Transfer Provisions.  Unless and until a Note is
exchanged for an Exchange Note in connection with an effective Registration
Statement pursuant to the Registration Rights Agreement, the following
provisions shall apply:
 
          (a) Transfers to Non-QIB Institutional Accredited Investors.  The
     following provisions shall apply with respect to the registration of any
     proposed transfer of a Note to any Institutional Accredited Investor which
     is not a QIB (excluding Non-U.S. Persons):
 
             (i) The Registrar shall register the transfer of any Note, whether
        or not such Note bears the Private Placement Legend, if (x) the
        requested transfer is after the time period referred to in Rule 144(k)
        under the Securities Act as in effect with respect to such transfer or
        (y) the proposed transferee has delivered to the Registrar (A) a
        certificate substantially in the form of Exhibit C hereto and (B) if the
        aggregate principal amount of the Notes being transferred is less than
        $100,000 at the time of such transfer, an Opinion of Counsel acceptable
        to the Company that such transfer is in compliance with the Securities
        Act.
 
             (ii) If the proposed transferor is an Agent Member holding a
        beneficial interest in the U.S. Global Note, upon receipt by the
        Registrar of (x) the documents, if any, required by paragraph (i) and
        (y) instructions given in accordance with the Depositary's and the
        Registrar's procedures, the Registrar shall reflect on its books and
        records the date and a decrease in the
 
                                       16
<PAGE>   24
 
        principal amount of the U.S. Global Note in an amount equal to the
        principal amount of the beneficial interest in the U.S. Global Note to
        be transferred, and the Company shall execute, and the Trustee shall
        authenticate and deliver, one or more U.S. Physical Notes of like tenor
        and amount.
 
          (b) Transfers to QIBs.  The following provisions shall apply with
     respect to the registration of any proposed transfer of a U.S. Physical
     Note, an interest in a U.S. Global Note or an interest in an Offshore
     Global Note prior to the removal of the Private Placement Legend to a QIB
     (excluding Non-U.S. Persons):
 
             (i) If the Note to be transferred consists of (x) either (A) an
        interest in an Offshore Global Note prior to the removal of the Private
        Placement Legend or (B) U.S. Physical Notes, the Registrar shall
        register the transfer if such transfer is being made by a proposed
        transferor who has checked the box provided for on the form of Note
        stating, or has otherwise advised the Company and the Registrar in
        writing, that the sale has been made in compliance with the provisions
        of Rule 144A to a transferee who has signed the certification provided
        for on the form of Note stating, or has otherwise advised the Company
        and the Registrar in writing, that it is purchasing the Note for its own
        account or an account with respect to which it exercises sole investment
        discretion and that it and any such account is a 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 its foregoing representations in order to
        claim the exemption from registration provided by Rule 144A or (y) an
        interest in the U.S. Global Notes, the transfer of such interest may be
        effected only through the book entry system maintained by the
        Depositary.
 
             (ii) If the proposed transferee is an Agent Member, and the Note to
        be transferred consists of U.S. Physical Notes, upon receipt by the
        Registrar of the documents referred to in clause (i) and instructions
        given in accordance with the Depositary's and the Registrar's
        procedures, the Registrar shall reflect on its books and records the
        date and an increase in the principal amount of the U.S. Global Notes in
        an amount equal to the principal amount of the U.S. Physical Notes to be
        transferred, and the Trustee shall cancel the U.S. Physical Notes so
        transferred.
 
          (c) Transfers of Interests in the Offshore Global Note or Offshore
     Physical Notes.  The following provisions shall apply with respect to any
     transfer of interests in the Offshore Global Notes or Offshore Physical
     Notes:
 
             (i) prior to the removal of the Private Placement Legend from an
        Offshore Global Note or Offshore Physical Note pursuant to Section 2.2,
        the Registrar shall refuse to register such transfer unless such
        transfer complies with Section 2.9(b) or Section 2.9(d), as the case may
        be; and
 
             (ii) after such removal, the Registrar shall register the transfer
        of any such Note without requiring any additional certification.
 
          (d) Transfers to Non-U.S. Persons at Any Time.  The following
     provisions shall apply with respect to any transfer of a Note to a Non-U.S.
     Person:
 
             (i) The Registrar shall register any proposed transfer to any
        Non-U.S. Person if the Note to be transferred is a U.S. Physical Note or
        an interest in the U.S. Global Note only upon receipt of a certificate
        substantially in the form of Exhibit D from the proposed transferor.
 
             (ii) (a) If the proposed Transferor is an Agent Member holding a
        beneficial interest in a U.S. Global Note, upon receipt by the Registrar
        of (x) the documents required by paragraph (i) and (y) instructions in
        accordance with the Depositary's and the Registrar's procedures, the
        Registrar shall reflect on its books and records the date and a decrease
        in the principal amount of such U.S. Global Note in an amount equal to
        the principal amount of the beneficial interest in the U.S. Global Note
        to be transferred, and (b) if the proposed transferee is an Agent
        Member, upon receipt by the Registrar of instructions given in
        accordance with the Depositary's and the Registrar's procedures,
 
                                       17
<PAGE>   25
 
        the Registrar shall reflect on its books and records the date and an
        increase in the principal amount of the Offshore Global Note in an
        amount equal to the principal amount of the U.S. Physical Notes or the
        U.S. Global Note, as the case may be, to be transferred, and the Trustee
        shall cancel the Physical Note, if any, so transferred or decrease the
        amount of the U.S. Global Note.
 
          (e) Private Placement Legend.  Upon the transfer, exchange or
     replacement of Notes not bearing the Private Placement Legend, the
     Registrar shall deliver Notes that do not bear the Private Placement
     Legend. Upon the transfer, exchange or replacement of Notes bearing the
     Private Placement Legend, the Registrar shall deliver only Notes that bear
     the Private Placement Legend unless either (i) the circumstances
     contemplated by paragraphs (a)(i)(x) or (c)(ii) of this Section 2.9 exist
     or (ii) there is delivered to the Registrar an Opinion of Counsel
     reasonably satisfactory to the Company and the Trustee to the effect that
     neither such legend nor the related restrictions on transfer are required
     in order to maintain compliance with the provisions of the Securities Act.
 
          (f) General.  By its acceptance of any Note bearing the Private
     Placement Legend, each Holder of such a Note acknowledges the restrictions
     on transfer of such Note set forth in this Indenture and in the Private
     Placement Legend and agrees that it will transfer such Note only as
     provided in this Indenture. The Registrar shall not register a transfer of
     any Note unless such transfer complies with the restrictions on transfer of
     such Note set forth in this Indenture. In connection with any transfer of
     Notes, each Holder agrees by its acceptance of the Notes to furnish the
     Registrar or the Company such certifications, legal opinions or other
     information as either of them may reasonably require to confirm that such
     transfer is being made pursuant to an exemption from, or a transaction not
     subject to, the registration requirements of the Securities Act, PROVIDED
     that the Registrar shall not be required to determine (but may conclusively
     rely on a determination made by the Company with respect to) the
     sufficiency of any such certifications, legal opinions or other
     information.
 
          The Registrar shall retain copies of all letters, notices and other
     written communications received by the Registrar pursuant to Section 2.8 or
     this Section 2.9. 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 written notice to the
     Registrar.
 
     SECTION 2.10.  Replacement Notes.
 
     If any mutilated Note is surrendered to the Trustee or if the Holder of a
Note claims that the Note has been lost, destroyed or wrongfully taken, and the
Company and the Trustee receive evidence to their satisfaction of the
destruction, loss or theft of any Note, the Company shall issue and the Trustee,
upon the written order of the Company in the form of an Officers' Certificate,
shall authenticate a replacement Note if the Trustee's requirements are met. If
required by the Trustee or the Company, an indemnity bond or other form of
indemnification must be supplied by the Holder that is sufficient in the
judgment of the Trustee and the Company to protect the Company, the Trustee, or
any Agent from any loss which any of them may suffer if a Note is replaced. The
Company may charge the Holder for its reasonable out-of-pocket expenses in
replacing a Note. Every replacement Note is an additional obligation of the
Company.
 
     SECTION 2.11.  Outstanding Notes.
 
     The Notes outstanding at any time are all the Notes authenticated by the
Trustee except for those cancelled or those delivered to it for cancellation and
those described in this Section 2.11 as not outstanding.
 
     If a Note is replaced pursuant to Section 2.10 hereof (other than a
mutilated Note surrendered for replacement), it ceases to be outstanding unless
the Trustee receives proof satisfactory to it that the replaced Note is held by
a bona fide purchaser. A mutilated Note ceases to be outstanding upon surrender
of such Note and replacement thereof pursuant to Section 2.10 hereof.
 
     If an amount of money necessary to pay or redeem any Note shall be
deposited in trust with the Trustee (and in the case of a Note which is to be
redeemed prior to the Stated Maturity thereof, notice of such redemption shall
be duly given or provision satisfactory to the Trustee shall be made for giving
such notice), it ceases to be outstanding and interest on it ceases to accrue on
and after the Redemption Date.
 
                                       18
<PAGE>   26
 
     If a Note is cancelled by the Trustee or delivered to the Trustee for
cancellation, it ceases to be outstanding and interest on it ceases to accrue.
 
     A Note does not cease to be outstanding because the Company or an Affiliate
of the Company holds the Note, except as otherwise provided in Section 2.12
hereof.
 
     SECTION 2.12.  Treasury Notes.
 
     In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Company, any other obligor upon the Notes or an Affiliate of the Company or such
other obligor shall be considered as though not outstanding, except that, for
the purposes of determining whether the Trustee shall be protected in relying on
any such direction, waiver or consent, only Notes which the Trustee knows are so
owned shall be so disregarded.
 
     SECTION 2.13.  Temporary Notes.
 
     Until definitive Notes are ready for delivery, the Company may prepare and
the Trustee shall authenticate temporary Notes upon receipt of a written order
of the Company in the form of an Officers' Certificate. The Officers'
Certificate shall specify the amount of temporary Notes to be authenticated and
the date on which the temporary Notes are to be authenticated. Temporary Notes
shall be substantially in the form of definitive Notes but may have variations
that the Company considers appropriate for temporary Notes. Without unreasonable
delay, the Company shall prepare and the Trustee, upon receipt of the written
order of the Company pursuant to Section 2.3 hereof, shall authenticate
definitive Notes in exchange for temporary Notes. Until such exchange, temporary
Notes shall be entitled to the same rights, benefits and privileges as
definitive Notes.
 
     SECTION 2.14.  Cancellation.
 
     The Company at any time may deliver Notes to the Trustee for cancellation.
The Registrar and Paying Agent shall forward to the Trustee for cancellation any
Notes surrendered to them for registration of transfer, exchange, payment,
repayment or redemption. The Trustee, or at the direction of the Trustee, the
Registrar or the Paying Agent (other than the Company or a Subsidiary of the
Company), and no one else, shall promptly cancel all Notes so delivered to the
Trustee or surrendered for registration of transfer, exchange, payment,
repayment, redemption, replacement or cancellation and shall destroy cancelled
Notes in accordance with the usual destruction procedures of the Trustee, unless
the Company directs them to be returned to it by written order in the form of an
Officers' Certificate. Subject to Section 2.10 hereof, the Company may not issue
and the Trustee shall not authenticate new Notes to replace Notes that it has
paid or that have been delivered to the Trustee for cancellation. All cancelled
Notes held by the Trustee shall be destroyed in accordance with the usual
destruction procedures of the Trustee and a record of their destruction shall be
maintained by the Trustee. If the Company shall acquire any of the Notes, such
acquisition shall not operate as a redemption or satisfaction of the Debt
represented by such Notes unless and until the same are surrendered to the
Trustee for cancellation pursuant to this Section 2.14.
 
     SECTION 2.15.  Defaulted Interest.
 
     If the Company defaults in a payment of interest on the Notes, it shall pay
the defaulted interest plus, to the extent lawful, interest payable on the
defaulted interest to the Persons who are Holders on a subsequent special record
date, which date shall be the fifteenth day next preceding the date fixed by the
Company for the payment of defaulted interest or the next succeeding Business
Day if such date is not a Business Day, in each case at the rate provided in the
Notes. The Company shall, with the consent of and by written notice to the
Trustee, fix each such special record date and payment date. At least 15 days
before the special record date, the Company shall pay the amount due to the
Trustee and the Company (or the Trustee, in the name of and at the expense of
the Company) shall mail to each Holder, with a copy to the Trustee, a notice
that states the subsequent special record date, the payment date and the amount
of defaulted interest, and interest payable on such defaulted interest, if any,
to be paid.
 
                                       19
<PAGE>   27
 
     SECTION 2.16.  Persons Deemed Owners.
 
     Prior to due presentment of a Note for registration of transfer and subject
to Section 2.15 hereof, the Company, the Trustee, any Paying Agent, any
co-registrar and any Registrar may deem and treat the Person in whose name any
Note shall be registered upon the register of Notes kept by the Registrar as the
absolute owner of such Note (whether or not such Note shall be overdue and
notwithstanding any notation of the ownership or other writing thereon made by
anyone other than the Company, any co-registrar or any Registrar) for the
purpose of receiving payments of principal of, premium, if any, or interest on,
such Note and for all other purposes; and none of the Company, the Trustee, any
Paying Agent, any co-registrar or any Registrar shall be affected by any notice
to the contrary.
 
     SECTION 2.17.  CUSIP, CINS and ISIN Numbers.
 
     The Company in issuing the Notes may use "CUSIP", "CINS", "ISIN" or other
identification numbers (if then generally in use), and, if so, the Trustee shall
use CUSIP numbers, CINS numbers, ISIN numbers or other identification numbers,
as the case may be, in notices of redemption or exchange as a convenience to
Holders, PROVIDED that any such notice shall state that no representation is
made as to the correctness of such numbers either as printed on the Notes or as
contained in any notice of redemption or exchange and that reliance may be
placed only to the other identification numbers printed on the Notes, PROVIDED
FURTHER that failure to use "CUSIP", "CINS", "ISIN" or other identification
numbers in any notice of redemption or exchange shall not effect the validity or
sufficiency of such notice
 
     SECTION 2.18.  Issuance of Additional Notes.
 
     The Company may, subject to Article Four of this Indenture, issue
additional Notes under this Indenture. The Notes issued on the Closing Date and
any additional Notes subsequently issued shall be treated as a single class for
all purposes under this Indenture.
 
                                   ARTICLE 3

                                   REDEMPTION
 
     SECTION 3.1.  Notices to Trustee.
 
     If the Company elects to redeem Notes pursuant to the optional redemption
provisions of Section 3.7 hereof, it shall furnish to the Trustee, at least 30
days but not more than 60 days before a Redemption Date, an Officers'
Certificate setting forth the Section of this Indenture pursuant to which the
redemption shall occur, the Redemption Date, the principal amount of Notes to be
redeemed and the Redemption Price. If the Company elects to have the Trustee
furnish notice of redemption (as described above) of the Notes to the Holders,
the Company shall notify the Trustee in writing and provide all the information
and documentation required by this paragraph, at least 45 days but not more than
60 days before a Redemption Date.
 
     If the Company is required to repurchase Notes pursuant to the provisions
of Section 4.17 hereof, it shall notify the Trustee in writing, at least 30 days
but not more than 60 days before a Redemption Date, of the Section of this
Indenture pursuant to which the repurchase shall occur, the Redemption Date, the
principal amount of Notes to be repurchased and the Redemption Price and shall
furnish to the Trustee an Officers' Certificate to the effect that (a) the
Company is required to make or has made a Change of Control Offer and (b) the
conditions set forth in Section 5.1 hereof have been satisfied. If the Company
elects to have the Trustee furnish notice of repurchase (as described above) of
the Notes to the Holders, the Company shall notify the Trustee in writing and
provide all the information and documentation required by this paragraph, at
least 45 days but not more than 60 days before a Redemption Date.
 
     If the Registrar is not the Trustee, the Company shall, concurrently with
each notice of redemption, cause the Registrar to deliver to the Trustee a
certificate (upon which the Trustee may rely) setting forth the principal
amounts of Notes held by each Holder.
 
                                       20
<PAGE>   28
 
     SECTION 3.2.  Selection of Notes to Be Redeemed.
 
     If less than all of the Notes are to be redeemed, the Trustee shall select
the Notes to be redeemed in compliance with the requirements of the principal
national securities exchange, if any, on which the Notes are listed or, if the
Notes are not listed on a national securities exchange or if no such
requirements exist, on a pro rata basis, by lot or by such method as the Trustee
shall deem fair and appropriate; PROVIDED, HOWEVER, that any Notes with a
principal amount of $1,000 or less shall not be redeemed or purchased in part.
In the event of partial redemption by lot, the particular Notes to be redeemed
shall be selected, unless otherwise provided herein, not less than 30 days nor
more than 60 days prior to the Redemption Date by the Trustee from the
outstanding Notes not previously called for redemption.
 
     The Trustee shall promptly notify the Company in writing of the Notes
selected for redemption and, in the case of any Note selected for partial
redemption, the principal amount thereof to be redeemed. Notes and portions of
them selected shall be in amounts of $1,000 or integral multiples of $1,000;
except that if all of the Notes of a Holder are to be redeemed, the entire
outstanding amount of Notes, held by such Holder, even if not a multiple of
$1,000, shall be redeemed. Except as provided in the preceding sentence,
provisions of this Indenture that apply to Notes called for redemption also
apply to portions of Notes called for redemption.
 
     In the event the Company is required to make an offer to redeem Notes
pursuant to Section 4.15 hereof and the amount of the Net Available Proceeds
from the Asset Disposition are not evenly divisible by $1,000, the Trustee shall
hold the remaining portion of such Net Available Proceeds that are not so
divisible until such amount, together with the Net Available Proceeds from any
subsequent Asset Disposition, may be applied to make an offer to redeem Notes
pursuant to Section 4.15.
 
     SECTION 3.3.  Notice of Redemption.
 
     Subject to the provisions of Section 3.8 hereof, at least 30 days but not
more than 60 days before a Redemption Date, the Company shall send by first
class mail a notice of redemption to each Holder, at the last address for such
Holder then shown on the registry books, whose Notes are to be redeemed, with a
copy to the Trustee.
 
     The notice shall identify the Notes to be redeemed and shall state:
 
          (1) the Redemption Date;
 
          (2) the Redemption Price;
 
          (3) if any Note is being redeemed in part, the portion of the
     principal amount of such Note to be redeemed (which portion shall not be
     less than $1,000) and that, after the Redemption Date, upon surrender of
     such Note, a new Note or Notes in principal amount equal to the unredeemed
     portion will be issued;
 
          (4) the name and address of the Paying Agent;
 
          (5) that Notes called for redemption must be surrendered to the Paying
     Agent to collect the Redemption Price;
 
          (6) that, unless the Company defaults in making the redemption
     payment, interest on Notes called for redemption ceases to accrue on and
     after the Redemption Date, and the only remaining right of the Holders of
     such Notes is to receive payment of the Redemption Price upon surrender to
     the Paying Agent of such Notes;
 
          (7) if fewer than all the Notes are to be redeemed, the identification
     of the particular Notes (or portion thereof) to be redeemed, as well as the
     aggregate principal amount of Notes to be redeemed and the aggregate
     principal amount of Notes to be outstanding after such partial redemption;
     and
 
          (8) the paragraph of this Indenture pursuant to which the Notes called
     for redemption are being redeemed.
 
     At the Company's request, the Trustee shall give the notice of redemption
in the Company's name and at its expense, PROVIDED that the Company shall
deliver to the Trustee, at least 45 days prior to the
 
                                       21
<PAGE>   29
 
Redemption Date, an Officers' Certificate requesting that the Trustee give such
notice and setting forth the information to be stated in such notice as provided
in the preceding paragraph.
 
     SECTION 3.4.  Effect of Notice of Redemption.
 
     Once notice of redemption is mailed, Notes called for redemption become due
and payable on the Redemption Date at the Redemption Price. Upon surrender to
any Paying Agent, such Notes shall be paid at the Redemption Price, on condition
that sufficient funds to pay the Redemption Price of such Notes have been
deposited with the Paying Agent; PROVIDED, HOWEVER, that installments of
interest whose Stated Maturity is on or prior to the Redemption Date shall be
payable to the Holders of such Notes, registered as such, at the close of
business on the relevant record date for the payment of such installment of
interest.
 
     SECTION 3.5.  Deposit of Redemption Price.
 
     At least one Business Day prior to the Redemption Date, the Company shall
irrevocably deposit with the Trustee or with the Paying Agent (or if the Company
is its own Paying Agent, shall, on or before the redemption date, segregate and
hold in trust) money sufficient to pay the Redemption Price of all Notes to be
redeemed on that date. The Trustee or the Paying Agent shall return to the
Company any money not required for that purpose.
 
     If the Company complies with the preceding paragraph, unless the Company
defaults in the payment of such Redemption Price, interest on the Notes to be
redeemed will cease to accrue on the applicable Redemption Date, whether or not
such Notes are presented for payment. If any Note called for redemption shall
not be so paid upon surrender for redemption because of the failure of the
Company to comply with the preceding paragraph, interest will be paid on the
unpaid principal, from the Redemption Date until such principal is paid, and on
any interest not paid on such unpaid principal, in each case at the rate
provided in the Notes and in Section 4.1 hereof.
 
     SECTION 3.6.  Notes Redeemed in Part.
 
     Upon surrender of a Note that is redeemed in part, the Company shall issue
and the Trustee shall authenticate for the Holder at the expense of the Company
a new Note equal in principal amount to the unredeemed portion of the Note
surrendered.
 
     SECTION 3.7.  Optional Redemption.
 
     The Company may redeem all or any of the Notes at any time on or after
November 1, 2002 at the Redemption Prices set forth in the Notes. Any redemption
pursuant to this Section 3.7 shall be made pursuant to the provisions of
Sections 3.1 through 3.6 hereof.
 
     SECTION 3.8.  Redemption Upon Change of Control Offer.
 
     The Company shall redeem Notes in accordance with the provisions of Section
4.17 hereof at a price of 101% of the principal amount thereof plus accrued and
unpaid interest, if any, to the Redemption Date. Any redemption pursuant to this
Section 3.8 shall be made pursuant to the provisions of Sections 3.1 through 3.6
hereof.
 
     SECTION 3.9.  Redemption Pursuant to Section 4.15.
 
     The Company shall redeem Notes in accordance with the provisions of Section
4.15 hereof at a price of 100% of the principal amount thereof plus accrued and
unpaid interest, if any, to the Redemption Date. Any redemption pursuant to this
Section 3.9 shall be made pursuant to the provisions of Sections 3.1 through 3.6
hereof.
 
                                       22
<PAGE>   30
 
                                   ARTICLE 4
 
                                   COVENANTS
 
     Subject to the provisions of Section 8.1 hereof, so long as Notes are
outstanding hereunder, the Company covenants for the benefit of the Holders
that:
 
     SECTION 4.1.  Payment of Principal and Interest.
 
     The Company shall pay the principal, premium, if any, and interest on the
Notes in the manner provided in the Notes and this Indenture. One Business Day
prior to any Stated Maturity, the Company shall irrevocably deposit with the
Trustee or with the Paying Agent money in immediately available funds sufficient
to pay such principal, premium, if any, and interest. An installment of
principal or interest (or a payment of premium, if applicable) shall be
considered paid on the date due if the Trustee or the Paying Agent (other than
the Company, a Subsidiary of the Company or an Affiliate of the Company) holds
on that date money designated for and sufficient to pay the installment in full.
The Trustee or the Paying Agent shall return to the Company any money not
required for that purpose. Such interest on the Notes shall be payable without
presentation of such Notes only to, or upon the written order of, the Holders of
such Notes. Payments of interest shall be made either, at the option of the
Company, by check mailed to the address of the Person entitled thereto as such
address shall appear on the register of Notes or at the office or agency of the
Company maintained in accordance with Section 4.2 hereof.
 
     The Company shall pay interest on overdue principal and premium, if any,
and interest on overdue installments of interest, to the extent lawful, at the
rate per annum borne by the Notes.
 
     SECTION 4.2.  Maintenance of Office or Agency for Notices and Demands.
 
     The Company shall maintain in the Borough of Manhattan, The City of New
York and, in the event the Notes are listed on the Luxembourg Stock Exchange, in
Luxembourg, an office or agency where the Notes may be presented for payment, an
office or agency where the Notes may be presented for registration of transfer
and for exchange as provided in this Indenture and an office or agency where
notices and demands to or upon the Company in respect of such Notes or of this
Indenture may be served. Until otherwise designated by the Company in a written
notice to the Trustee, such office or agency in The City of New York shall be
the corporate trust office of the Trustee, which shall be, until further notice
to the Company by the Trustee, at 40 Broad Street, Fifth Floor, Suite 550, New
York, NY 10004, and, in the event the Notes are listed on the Luxembourg Stock
Exchange, in Luxembourg at Banque Internationale a Luxembourg, S.A., 69 route
d'Esch, L-1470 Luxembourg           .
 
     SECTION 4.3.  Insurance Matters.
 
     The Company shall provide or cause to be provided, for itself and each of
its Subsidiaries, insurance (including appropriate self-insurance) against loss
or damage of the kinds that, in the reasonable, good faith opinion of the
Company, are adequate and appropriate for the conduct of the business of the
Company and its Subsidiaries in a prudent manner, with reputable insurers or
with the government of the United States of America or an agency or
instrumentality thereof, in such amounts, with such deductibles, and by such
methods as shall be either (i) consistent with past practices of the Company or
the applicable Subsidiary or (ii) customary, in the reasonable, good faith
opinion of the Company, for corporations similarly situated in the industry,
unless the failure to provide such insurance (together with all other such
failures) would not have a material adverse effect on the financial condition or
results of operations of the Company and its Subsidiaries, taken as a whole.
 
     SECTION 4.4.  Compliance Certificate; Notice of Default.
 
     (a) The Company shall deliver to the Trustee, within 120 days after the end
of the Company's fiscal year, an Officers' Certificate stating that a review of
its activities and the activities of its Subsidiaries during the preceding
fiscal year has been made under the supervision of the signing Officers with a
view to determining whether it has kept, observed, performed and fulfilled its
obligations under this Indenture and further stating, as to each such Officer
signing such certificate, that to the best of his or her knowledge the
 
                                       23
<PAGE>   31
 
Company during such preceding fiscal year has kept, observed, performed and
fulfilled each and every of its covenants contained in this Indenture and no
Default or Event of Default occurred during such year or, if such signers do
know of any Default or Event of Default, the certificate shall describe such
Default or Event of Default and its status with reasonable particularity.
 
     (b) The Company shall deliver to the Trustee, within five (5) Business Days
after becoming aware of any Default or Event of Default in the performance of
any covenant, agreement or condition contained in this Indenture, a notice
identifying in reasonable detail the circumstances relating to such Default or
Event of Default.
 
     SECTION 4.5.  Corporate Existence.
 
     Subject to Article Five hereof, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence, material rights (charter and statutory) and franchises; PROVIDED,
HOWEVER, that the Company shall not be required to preserve any such material
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 that the loss thereof is not disadvantageous in any material
respect to the Holders of the Notes.
 
     SECTION 4.6.  Payment of Taxes and Other Claims.
 
     The Company will pay or discharge or cause to be paid or discharged, before
any material penalty accrues thereon, (1) all material taxes, assessments and
governmental charges levied or imposed upon the Company or any Subsidiary of the
Company or upon the income, profits or property of the Company or any Subsidiary
of the Company, and (2) all material lawful claims for labor, materials and
supplies which, if unpaid, might by law become a Lien upon the property of the
Company or any Subsidiary of the Company; PROVIDED, HOWEVER, that the Company
shall not be required to pay or discharge or cause to be paid or discharged any
such tax, assessment, charge or claim whose amount, applicability or validity is
being contested in good faith by appropriate proceedings.
 
     SECTION 4.7.  Reports.
 
     So long as any of the Notes are outstanding, whether or not the Company is
subject to Section 13(a) or 15(d) of the Exchange Act, the Company shall file
with the Securities and Exchange Commission (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 Sections 13(a) or 15(d) of
the Exchange Act if the Company were so subject, 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 such documents if the
Company were so subject. The Company shall also in any event within 15 days
after each Required Filing Date mail to the Trustee, and shall mail or cause to
be mailed to each Holder, copies of the annual reports, quarterly reports and
other documents which the Company would have been required to file with the
Commission pursuant to Sections 13(a) or 15(d) of the Exchange Act if the
Company were subject to such Sections; PROVIDED, HOWEVER, that the copies of
such reports mailed to Holders may omit exhibits. Upon qualification of this
Indenture under the TIA, the Company shall also comply with the other provisions
of TIA Section 314(a). Notwithstanding anything to the contrary herein, the
Trustee shall have no duty to review such documents for purposes of determining
compliance with any provisions of this Indenture.
 
     SECTION 4.8.  Waiver of Stay, Extension or Usury Laws.
 
     The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay or extension law or any usury law or
other law that would prohibit or forgive the Company from paying all or any
portion of the principal of, premium, if any, or interest on, the Notes as
contemplated herein, wherever enacted, now or at any time hereafter in force, or
which may affect the covenants or the performance of this Indenture; and (to the
extent that it may lawfully do so) the Company hereby expressly waives all
benefit or advantage of any such law, and covenants that it will not hinder,
delay or impede the execution of any power herein granted to
 
                                       24
<PAGE>   32
 
the Trustee, but will suffer and permit the execution of every such power as
though no such law had been enacted.
 
     SECTION 4.9.  Limitation on Incurrence of Debt.
 
     The Company may not Incur, and may not permit any of its Subsidiaries to
Incur, any Debt; PROVIDED, HOWEVER, that (a) the Company may Incur any Debt and
(b) the Company may permit a Subsidiary to Incur Acquired Debt, if, in either
case, immediately thereafter the ratio of (A) the aggregate principal amount of
Debt of the Company and its Subsidiaries outstanding as of the date of such
Incurrence to (B) Pro Forma Consolidated Cash Flow for the most recently ended
full fiscal quarter multiplied by four, determined on a pro forma basis as if
any such Debt had been Incurred and the proceeds thereof had been applied at the
beginning of such fiscal quarter, would be less than 6.0 to 1 but greater than
zero.
 
     Notwithstanding the foregoing limitation, the Company may Incur and, as
applicable, may permit its Subsidiaries to Incur, without duplication, the
following Debt: (i) Debt of the Company or any Subsidiary under the Credit
Facility in an aggregate principal amount not to exceed $150.0 million at any
one time outstanding; (ii) Guarantees by Subsidiaries of Debt under the Credit
Facility Incurred by the Company in accordance with this covenant; (iii) Debt of
the Company evidenced by the Notes; (iv) Debt owed by the Company to any wholly
owned Subsidiary of the Company or owed by any wholly owned Subsidiary of the
Company to the Company or any other wholly owned Subsidiary of the Company (but
only so long as such Debt is held by the Company or such wholly owned
Subsidiary); (v) Debt outstanding on the date the Notes are originally issued
under the Indenture; (vi) Debt arising from the honoring by a bank or other
financial institution of a check, draft or similar instrument drawn against
insufficient funds in the ordinary course of business, PROVIDED that such Debt
is extinguished within two Business Days of its Incurrence; (vii) Refinancing
Debt; and (viii) renewals of Guarantees permitted by clause (ii) above.
 
     For purposes of determining any particular amount of Debt under this
covenant, Guarantees of (or obligations with respect to letters of credit
supporting) Debt otherwise included in the determination of such amount shall
not also be included. For the purpose of determining compliance with this
covenant, (A) 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; and (B) the
amount of Debt issued at a price which is less than the principal amount thereof
shall be equal to the amount of the liability in respect thereof determined in
accordance with GAAP.
 
     SECTION 4.10.  Limitation on Certain Debt.
 
     So long as any of the Notes are outstanding, the Company will not Incur any
Debt that is by its terms subordinate or junior in any respect in right of
payment to any Senior Debt and that is senior in any respect in right of payment
to the Notes.
 
     SECTION 4.11.  Limitation on Restricted Payments.
 
     The Company may not, and may not permit any of its Subsidiaries to, (i)
directly or indirectly, declare or pay any dividend, or make any distribution,
in respect of its Capital Stock or to the holders thereof (including pursuant to
a merger or consolidation of the Company, but excluding any dividends or
distributions payable solely in shares of its Capital Stock (other than
Redeemable Stock) or in options, warrants or other rights to acquire its Capital
Stock (other than Redeemable Stock)), other than dividends or distributions
payable to the Company or any wholly owned Subsidiary of the Company, or by a
Subsidiary of the Company to a holder who is not the Company or a Subsidiary of
the Company, PROVIDED that such dividend or distribution is paid to all of the
holders of the Capital Stock of the payor of such dividend, pro rata in
accordance with their respective interests, (ii) directly or indirectly,
repurchase, redeem or otherwise acquire or retire for value (a) any Capital
Stock of the Company or any Related Person or (b) any options, warrants or
rights to purchase or acquire shares of Capital Stock of the Company or any
Related Person, (iii) purchase or otherwise acquire any Capital Stock of, or
make any loan, advance, capital contribution to or investment in, or any payment
on a Guarantee of any obligation of, any Affiliate or any Related Person (other
than the Company or a wholly owned Subsidiary of the Company), inclusive of any
such purchase, loan, advance,
 
                                       25
<PAGE>   33
 
capital contribution to or investment in, or payment on a Guarantee of any
obligation of, any Affiliate or Related Person pursuant to a transaction whereby
any such Affiliate or Related Person becomes an Affiliate or Related Person, but
exclusive of any such purchase, loan, advance, capital contribution to or
investment in, or payment on a Guarantee of any obligation of, any Person
pursuant to a transaction whereby any such Person becomes a Subsidiary of the
Company, in each case unless otherwise prohibited by the terms of this
Indenture, or (iv) redeem, defease, repurchase, retire or otherwise acquire or
retire for value prior to any scheduled maturity, repayment or sinking fund
payment (other than with the proceeds of Refinancing Debt) Debt of the Company
which is subordinate in right of payment to the Notes (each of clauses (i)
through (iv) being a "Restricted Payment"), if at the time of such Restricted
Payment, or after giving effect thereto: (1) an Event of Default, or an event
that with the lapse of time or the giving of notice, or both, would constitute
an Event of Default, shall have occurred and be continuing, (2) the Company
could not Incur $1.00 of additional Debt pursuant to the first paragraph of
Section 4.9 hereof, or (3) the aggregate of all Restricted Payments from June
30, 1995 exceeds the sum of: (a) the excess of (x) 100% of cumulative
Consolidated Cash Flow after June 30, 1995 through the last day of the last full
fiscal quarter immediately preceding such Restricted Payment for which quarterly
or annual financial statements of the Company are available over (y) the product
of 2.0 times cumulative Consolidated Fixed Charges after June 30, 1995 through
the last day of the last full fiscal quarter immediately preceding such
Restricted Payment for which quarterly or annual financial statements of the
Company are available; and (b) 100% of the aggregate net proceeds received by
the Company from the issuance or sale after June 30, 1995 of (A) Capital Stock
(other than Redeemable Stock) of the Company or options, warrants or other
rights to acquire Capital Stock (other than Redeemable Stock) of the Company or
(B) Debt of the Company that has been converted or exchanged into Capital Stock
(other than Redeemable Stock) of the Company (to the extent such Debt is so
converted or exchanged).
 
     The foregoing provision will not be violated by reason of (i) the payment
of any dividend within 60 days after declaration thereof if at the declaration
date such payment would have complied with the foregoing provision; (ii) any
payment for the purchase, redemption, acquisition or retirement of any shares of
Capital Stock of the Company in exchange for, or out of the net proceeds of the
substantially concurrent sale (other than to a Subsidiary of the Company) of,
other shares of Capital Stock (other than Redeemable Stock) of the Company;
(iii) the purchase, redemption, defeasance or other acquisition or retirement of
Debt of the Company which is subordinate in right of payment to the Notes, in
exchange for, by conversion into, or out of the net proceeds of, a substantially
concurrent (a) issuance or sale (other than to a Subsidiary) of Capital Stock
(other than Redeemable Stock) of the Company, or (b) Incurrence of Refinancing
Debt with respect to such subordinated Debt; (iv) Permitted Stock Repurchases by
the Company not to exceed $2.0 million individually or $6.0 million in the
aggregate during such time as any of the Notes are outstanding; (v) Restricted
Payments consisting of investments in telecommunications businesses in an
aggregate amount not exceeding $20.0 million; or (vi) the making of other
Restricted Payments in an aggregate amount not exceeding $10.0 million;
PROVIDED, that no Default or Event of Default shall have occurred and be
continuing at the time, or shall occur as a result, of any of the actions
contemplated in clauses (ii) through (vi) above. Any payment made pursuant to
clauses (i) through (iv) of this paragraph (other than subclause (iii)(b) of
this paragraph) shall be a Restricted Payment for purposes of calculating
aggregate Restricted Payments under the preceding paragraph.
 
     SECTION 4.12.  Limitation on Dividend and Other Payment Restrictions
                    Affecting Subsidiaries.
 
     The Company may not, and may not permit any Subsidiary of the Company to,
create, assume or otherwise suffer to exist any encumbrance or restriction on
the ability of any Subsidiary of the Company, directly or indirectly, (i) to pay
dividends or make any other distributions in respect of its Capital Stock or pay
any Debt or other obligation owed to the Company or any other Subsidiary of the
Company; (ii) to make loans or advances to the Company or any Subsidiary of the
Company; or (iii) to transfer any of its property or assets to the Company or a
Subsidiary of the Company. Notwithstanding the foregoing, the Company may, and
may permit any of its Subsidiaries to, create, assume or otherwise suffer to
exist any such encumbrance or restriction on the ability of any Subsidiary of
the Company if and to the extent (a) subject to the provisions described under
Section 5.1 hereof, such encumbrance or restriction existed prior to the time
any Person became a Subsidiary of the Company and such restriction or
encumbrance was not incurred in anticipation of
 
                                       26
<PAGE>   34
 
such acquisition of such Person by the Company; PROVIDED, HOWEVER, that such
restriction or encumbrance applies only to such Person, its Subsidiaries and
their respective properties and assets, and is not applicable to any other
Person, properties or assets; (b) such encumbrance or restriction is contained
in an operating lease for real property and is effective only upon the
occurrence and during the continuance of a default in the payment of rent; (c)
such encumbrance or restriction is the result of applicable corporate law or
regulation relating to the payment of dividends or distributions; (d) such
encumbrance or restriction is the result of any applicable statute, regulation
or administrative rule that restricts the transfer of licenses or permits; or
(e) such encumbrance or restriction is contained in (and for the benefit only of
the administrative agent and the lenders under) the Credit Facility on the date
of the Indenture, including any amendment, modification, supplement, restatement
or replacement of such Credit Facility after the date of the Indenture, PROVIDED
that the terms and conditions of such amendment, modification, supplement,
restatement or replacement in respect of such encumbrance or restriction are not
less favorable to the Holders of the Notes than the terms and conditions in
respect of such encumbrance or restriction of the Credit Facility on the date of
the Indenture.
 
     SECTION 4.13.  Limitation on Liens.
 
     The Company will not, and will not permit any Subsidiary of the Company to,
create, incur, assume or suffer to exist any Lien (other than Permitted Liens)
upon or in respect of any of its property or assets to secure any Debt that is
pari passu with or subordinate in right of payment to the Notes, unless the
Notes are secured equally and ratably simultaneously with or prior to the
creation, incurrence or assumption of such Lien; PROVIDED, HOWEVER, that if such
Debt is expressly subordinate to the Notes, the Lien securing such subordinated
Debt shall be subordinate and junior to the Lien securing the Notes with the
same relative priority as such subordinated Debt shall have with respect to the
Notes.
 
     SECTION 4.14. Limitation on Transactions with Affiliates and Related
                   Persons.
 
     The Company may not, and may not permit any Subsidiary of the Company to,
directly or indirectly, enter into any transaction or series of related
transactions after the date of the Indenture with any Affiliate or Related
Person (other than the Company or a wholly owned Subsidiary of the Company),
unless (i) such transaction or series of transactions is on terms no less
favorable to the Company or such Subsidiary than those that could be obtained in
a comparable arm's-length transaction with an entity that is not an Affiliate or
a Related Person; and (ii) if such transaction or series of transactions
involves aggregate consideration in excess of $1 million, (A) such transaction
or series of transactions is approved by a majority of the Board of Directors of
the Company, including the approval of a majority of the independent,
disinterested directors, as fair to the Company from a financial point of view
and is evidenced by a resolution of the Board of Directors of the Company, or
(B) the Company shall have obtained the written opinion of a nationally
recognized independent financial advisor stating that such transaction or series
of transactions is fair to the Company from a financial point of view.
 
     This covenant will not apply to (a) transactions between the Company or any
of its Subsidiaries and any employee of the Company or any of its Subsidiaries
that are entered into in the ordinary course of business, (b) the payment of
reasonable and customary regular fees and expenses to directors of the Company,
(c) the making of indemnification, contribution or similar payments to any
director or officer of the Company or any Subsidiary of the Company under the
Company's or such Subsidiary's charter or bylaws (as each may be amended after
the date of this Indenture) or any indemnification or similar agreement between
the Company or any such Subsidiary and any of its directors or officers
(collectively, "Indemnification Agreements"), or (d) the entering into any
Indemnification Agreements with any current or future directors or officers of
the Company or any Subsidiary of the Company.
 
     SECTION 4.15.  Limitation on Certain Asset Dispositions.
 
     The Company may not, and may not permit any Subsidiary of the Company to,
make any Asset Disposition in one or more transactions unless: (i) the Company
(or such Subsidiary, as the case may be) receives consideration at the time of
such Asset Disposition at least equal to the fair market value of the assets
sold or disposed of as determined by the Board of Directors of the Company; (ii)
at least 80% of the
 
                                       27
<PAGE>   35
 
consideration for such Asset Disposition consists of cash or readily marketable
cash equivalents or the assumption of Senior Debt or Debt of the Company that
ranks pari passu in right of payment with the Notes ("pari passu Debt") to the
extent that the Company is released from all liability on such Senior Debt or
pari passu Debt; and (iii) all Net Available Proceeds of such Asset Disposition,
less any amounts invested within 180 days of such Asset Disposition in assets
related to the business of the Company (or invested within one year of such
Asset Disposition in assets related to the business of the Company, pursuant to
an agreement to make such investment entered into within 180 days of such Asset
Disposition), are applied within such 180-(or 360-) day period, (a) to the
permanent reduction of any Debt then outstanding under the Credit Facility, (b)
to the repayment of any other Senior Debt, or (c) to the extent Net Available
Proceeds are not applied in accordance with the foregoing clause (a) or (b), to
make an offer to purchase, on a pro rata basis according to their respective
principal amounts then outstanding (or accreted value, in the case of Debt
issued with original issue discount), the outstanding Notes and pari passu Debt,
at 100% of their principal amount (or accreted value, as the case may be), plus
accrued interest to the date of the purchase.
 
     Notwithstanding clause (c) of the preceding paragraph, the Company shall
not be required to offer to purchase Notes or other pari passu Debt until the
Net Available Proceeds from any Asset Disposition together with the Net
Available Proceeds from any prior Asset Disposition not otherwise applied in
accordance with clauses (a), (b) or (c) of the preceding paragraph, less any
amounts invested within 180 days (or 360 days, as applicable) after such
disposition or dispositions in assets related to the business of the Company,
exceed $5.0 million. To the extent that the aggregate purchase price of the
Notes tendered pursuant to such an offer to purchase is less than the aggregate
purchase price offered in such offer, the Company may use such shortfall for
general corporate purposes. The Company shall not be entitled to any credit
against such obligation to purchase Notes for the principal amount of any Notes
acquired by the Company other than pursuant to such offer to purchase. Upon
completion of any such offer, the amount of Net Available Proceeds shall be
deemed to be reset at zero. If, within 180 days after an Asset Disposition, the
Company or a Subsidiary enters into a contract providing for the investment of
Net Available Proceeds in assets relating to the business of the Company and
such contract is terminated without fault on the part of the Company or such
Subsidiary prior to the making of such investment, the Company or such
Subsidiary, as the case may be, shall within 90 days after the termination of
such agreement, or within 180 days after such Asset Disposition, whichever is
later, invest or otherwise apply the funds that were to be invested pursuant to
such agreement in accordance with clause (iii) of the preceding paragraph, and
any funds so invested or applied shall for all purposes hereof be deemed to have
been so invested or applied within the 180- (or 360-) day period provided for in
such clause (iii). These provisions will not apply to a transaction which is
permitted under the provisions described under Section 5.1.
 
     The provisions of this covenant shall not apply to any Asset Disposition
which is part of an Asset Exchange Transaction if (i) the Board of Directors of
the Company shall determine that the Asset Exchange Transaction is fair and
reasonable to, and in the best interests of, the Company, which determination
shall be evidenced by a resolution of the Board of Directors of the Company
filed with the Trustee and (ii) in the event that such transfer is made to an
Affiliate or Related Person, the Company shall have complied with the provisions
of Section 4.14.
 
     SECTION 4.16. Limitation on Issuances and Sales of Capital Stock of
                   Subsidiaries.
 
     The Company (i) shall not, and shall not permit any Subsidiary of the
Company to, transfer, convey, sell, lease or otherwise dispose of any Capital
Stock of such or any other Subsidiary to any Person (other than the Company or a
wholly owned Subsidiary of the Company) unless such transfer, conveyance, sale,
lease or other disposition is of all the Capital Stock of such Subsidiary owned
by the Company or such other Subsidiary and the Net Available Proceeds from such
transfer, conveyance, sale, lease or other disposition are applied in accordance
with the provisions described under Section 4.15 hereof and (ii) shall not
permit any Subsidiary to issue shares of its Capital Stock (other than
directors' qualifying shares), or securities convertible into, or warrants,
rights or options to subscribe for or purchase shares of, its Capital Stock to
any Person other than the Company or a wholly owned Subsidiary of the Company.
 
                                       28
<PAGE>   36
 
     SECTION 4.17.  Change of Control.
 
     Upon the occurrence of a Change of Control, each Holder of the Notes shall
have the right to require that the Company repurchase such Holder's Notes, in
whole or in part (equal to $1,000 or integral multiples of $1,000), at a
repurchase price in cash equal to 101% of the principal amount thereof plus
accrued and unpaid interest, if any, to the date of repurchase, pursuant to the
offer described in the immediately following paragraph (the "Change of Control
Offer").
 
     Within 30 days following any Change of Control, the Company shall mail a
notice to each Holder, with a copy to the Trustee, stating: (i) that a Change of
Control has occurred and that such Holder has the right to require the Company
to repurchase such Holder's Notes, in whole or in part (equal to $1,000 or
integral multiples of $1,000), at a repurchase price in cash equal to 101% of
the principal amount thereof plus accrued and unpaid interest, if any, to the
date of repurchase; (ii) the circumstances and relevant facts regarding such
Change of Control (including, to the extent known to the Company, relevant
information with respect to the transaction giving rise to such Change of
Control, and if applicable, information with respect to pro forma historical
income, cash flow and capitalization after giving effect to such Change of
Control); (iii) the repurchase date (which shall be not earlier than 30 days or
later than 60 days from the date such notice is mailed) (the "Repurchase Date");
(iv) that any Note not tendered will continue to accrue interest; (v) that any
Note accepted for payment pursuant to the Change of Control Offer shall cease to
accrue interest after the Repurchase Date unless the Company defaults in payment
of the purchase price; (vi) that Holders electing to have a Note purchased
pursuant to a Change of Control Offer will be required to surrender the Note,
with the form entitled "Option of Holder to Elect Purchase" on the reverse of
the Note completed, to the Paying Agent (which may be the Company) at the
address specified in the notice prior to the close of business on the Repurchase
Date; (vii) that Holders will be entitled to withdraw their election if the
Paying Agent receives, not later than the close of business on the third
Business Day (or such shorter periods as may be required by applicable law)
preceding the Repurchase Date, a telegram, telex, facsimile transmission or
other written communication setting forth the name of the Holder, the principal
amount of Notes the Holder delivered for purchase, and a statement that such
Holder is withdrawing his or her election to have such Notes purchased and
instructing the Trustee to return his or her Notes; and (viii) that Holders
which elect to have their Notes purchased only in part will be issued new Notes
in a principal amount equal to the unpurchased portion of the Notes surrendered.
 
     On the Repurchase Date, the Company shall (i) accept for payment Notes or
portions thereof tendered pursuant to the Change of Control Offer, (ii) deposit
with the Trustee or a Paying Agent (or segregate, if the Company is acting as
its own Paying Agent) money in immediately available funds sufficient to pay the
purchase price of all Notes or portions thereof so tendered and (iii) deliver or
cause to be delivered to the Trustee Notes so accepted, together with an
Officers' Certificate indicating the Notes or portions thereof which have been
tendered to the Company. The Trustee or a Paying Agent shall promptly mail to
the Holders of Notes so accepted payment in an amount equal to the purchase
price therefor and promptly authenticate and mail to such Holders a new Note in
a principal amount equal to any unpurchased portion of the Note surrendered. The
Company will publicly announce the results of the Change of Control Offer on or
as soon as practicable after the Repurchase Date.
 
     In the event a Change of Control occurs and any repurchase pursuant to the
foregoing constitutes a "tender offer" for purposes of Rule 14e-1 under the
Exchange Act, the Company will comply with the requirements of Rule 14e-1 as
then in effect, to the extent applicable, and any other applicable securities
laws or regulations with respect to such repurchase. The Change of Control
provisions described above may deter certain mergers, tender offers and other
takeover attempts involving the Company.
 
                                       29
<PAGE>   37
 
                                   ARTICLE 5

                                   SUCCESSORS
 
     SECTION 5.1.  Limitation on Mergers, Consolidations and Certain Sales of
Assets.
 
     The Company (i) may not consolidate with or merge into any other Person or
permit any other Person to consolidate with or merge into the Company or any
Subsidiary of the Company (in a transaction in which such Subsidiary remains a
Subsidiary of the Company); and (ii) may not, directly or indirectly, transfer,
convey, sell, lease or otherwise dispose of all or substantially all of its
assets, unless, in either such case: (1) immediately before and after giving
effect to such transaction and treating any Debt Incurred by the Company or a
Subsidiary of the Company as a result of such transaction as having been
Incurred by the Company or such Subsidiary at the time of the transaction, no
Event of Default or 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; (2) in a transaction in which the Company does not survive or in
which the Company conveys, sells, leases or otherwise disposes of all or
substantially all of its assets, the successor entity to the Company is
organized under the laws of the United States or any State thereof or the
District of Columbia and expressly assumes, 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; and (3) immediately after giving
effect to such transaction, the Company or the successor entity to the Company
could Incur at least $1.00 of additional Debt pursuant to the first paragraph of
Section 4.9 hereof.
 
     Notwithstanding the foregoing, any wholly owned Subsidiary may consolidate
with, merge into or transfer all or part of its properties and assets to the
Company.
 
     The Company shall deliver to the Trustee prior to the consummation of the
proposed transaction an Officers' Certificate to the foregoing effect and an
Opinion of Counsel stating that the proposed transaction and such supplemental
Indenture comply with this Indenture.
 
     SECTION 5.2.  Successor Corporation Substituted.
 
     Upon any consolidation or merger, or any sale, lease, conveyance or other
disposition of all or substantially all of the assets of the Company, in
accordance with Section 5.1 hereof, the continuing corporation or the entity
formed by or surviving any such consolidation or merger, or to which a sale,
lease, conveyance or other disposal of all or substantially all of the Company's
assets is made (the "Surviving Entity") 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 Surviving Entity has been named as the Company
herein, and, except in the case of a lease, the predecessor corporation shall be
relieved of all obligations and covenants under this Indenture and the Notes.
 
                                   ARTICLE 6
 
                             DEFAULTS AND REMEDIES
 
     SECTION 6.1.  Events of Default.
 
     An "EVENT OF DEFAULT" shall occur if:
 
          (a) the Company fails to pay interest on any Notes when the same
     becomes due and payable and such failure continues for a period of 30 days;
 
          (b) the Company fails to pay the principal of or premium, if any, on
     any Notes when the same becomes due and payable, at maturity, upon
     acceleration, redemption or otherwise, or the Company fails to pay the
     principal of, premium, if any, and interest on any Notes required to be
     purchased pursuant to a Change of Control Offer pursuant to Section 4.17
     hereof or an offer to repurchase Notes pursuant to Section 4.15 hereof, as
     provided in such Section;
 
                                       30
<PAGE>   38
 
          (c) the Company or any Subsidiary of the Company fails to perform any
     other term, covenant, condition, provision or agreement (other than the
     provisions of Article Five) contained in the Notes or this Indenture, and
     such failure continues for a period of 60 days after the notice specified
     below;
 
          (d) the Company or any Subsidiary of the Company fails to perform or
     comply with the provisions of Article Five hereof;
 
          (e) the Company or any of its Subsidiaries (A) admits in writing its
     inability to pay its debts generally as they become due, (B) commences a
     voluntary case or proceeding under any Bankruptcy Law with respect to
     itself, (C) consents to the entry of a judgment, decree or order for relief
     against it in an involuntary case or proceeding under any Bankruptcy Law,
     (D) consents to the appointment of a custodian of it or for substantially
     all of its property, (E) consents to or acquiesces in the institution of a
     bankruptcy or an insolvency proceeding against it, (F) makes a general
     assignment for the benefit of its creditors, or (G) takes any corporate
     action to authorize or effect any of the foregoing;
 
          (f) a court of competent jurisdiction enters a judgment, decree or
     order for relief in respect of the Company or any of its Subsidiaries in an
     involuntary case or proceeding under any Bankruptcy Law, which shall (A)
     approve as properly filed a petition seeking reorganization, arrangement,
     adjustment or composition in respect of the Company or any of its
     Subsidiaries, (B) appoint a custodian of the Company or any of its
     Subsidiaries or for substantially all of its property or (C) order the
     winding-up or liquidation of its affairs; and such judgment, decree or
     order shall remain unstayed and in effect for a period of 60 consecutive
     days;
 
          (g) final judgment or judgments for the payment of money which in the
     aggregate at any one time exceeds $5.0 million shall be rendered against
     the Company or any Subsidiary of the Company by a court of competent
     jurisdiction and shall not have been vacated, discharged, satisfied or
     stayed within 60 days after such judgment becomes final and nonappealable;
     or
 
          (h) a default shall have occurred under any bonds, debentures, notes
     or other evidences of indebtedness of the Company or any Subsidiary of the
     Company or under any mortgages, indentures or instruments under which there
     may be issued or by which there may be secured or evidenced any
     indebtedness by the Company or any Subsidiary of the Company, in any case
     with a principal amount of at least $5.0 million outstanding, and such
     indebtedness already is due and payable in full or such default has
     resulted in the acceleration of the maturity of such indebtedness.
 
     Subject to the provisions of this Indenture relating to the duties of the
Trustee in case an Event of Default shall occur and be continuing, the Trustee
will be under no obligation to exercise any of its rights or powers under this
Indenture at the request or direction of any of the Holders, unless such Holders
shall have offered reasonable indemnity to the Trustee, in accordance with
Sections 6.6 and 7.1(5) hereof. Subject to such provisions for the
indemnification of the Trustee and in accordance with Section 6.5 hereof, the
Holders of a majority in aggregate principal amount of the outstanding Notes
will 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.
 
     A Default under clause (c) above is not an Event of Default until the
Trustee notifies the Company, or the Holders of at least 25% in aggregate
principal amount of the outstanding Notes notify the Company and the Trustee, of
the Default, and the Company or the applicable Subsidiary of the Company does
not cure the Default within 60 days after receipt of such notice. The notice
must specify the Default, demand that it be remedied and state that the notice
is a "Notice of Default" under this Section 6.1. Such notice shall be given by
the Trustee if so requested by the Holders of at least 25% in aggregate
principal amount of the Notes then outstanding. When a Default is cured or
waived, it ceases.
 
     SECTION 6.2.  Acceleration.
 
     (a) If an Event of Default (other than an Event of Default specified in
Section 6.1(e) or 6.1(f) with respect to the Company or any Subsidiary of the
Company) occurs and is continuing, (i) the Trustee may, by notice to the Company
and to the agent bank for the Credit Facility (and, if any Designated Senior
Debt is
 
                                       31
<PAGE>   39
 
outstanding, to the holders thereof or their Senior Representatives), or (ii)
the Holders of at least 25% in aggregate principal amount of the Notes then
outstanding may, by written notice to the Company and the Trustee, and upon any
such request of such Holders the Trustee shall (by notice as provided in clause
(i) above), declare the aggregate principal amount of the Notes outstanding,
together with accrued but unpaid interest thereon to the date of payment, to be
due and payable and, upon any such declaration, the same (A) shall become and be
due and payable; or (B) if there is any Senior Debt under the Credit Facility or
Designated Senior Debt outstanding, shall become due and payable upon the first
to occur of an acceleration under such Senior Debt or five Business Days after
receipt by the Company, the agent bank for the Credit Facility and the Senior
Representative with respect to such Designated Senior Debt of such acceleration
notice, unless all Events of Default specified in such acceleration notice
(other than any Event of Default in respect of non-payment of principal) shall
have been cured; and thereupon the Trustee may, at its discretion, proceed to
protect and enforce the rights of the Holders of Notes by appropriate judicial
proceeding. However, the Trustee shall be under no obligation to follow any
request, order or direction of any of the Holders unless such Holders shall have
offered to the Trustee reasonable security or indemnity against the costs,
expenses and liabilities which may be incurred by it in compliance with such
request, order or direction. If an Event of Default specified in Section 6.1(e)
or 6.1(f) occurs with respect to the Company, all unpaid principal or premium,
if any, of, and accrued interest on, the Notes then outstanding shall ipso facto
become and be immediately due and payable without any declaration or other act
on the part of the Trustee or any Holders.
 
     (b) After a declaration of acceleration has been made, but before a
judgment or decree for payment of the money due has been obtained by the
Trustee, the Holders of at least a majority in aggregate principal amount of
Notes outstanding, by written notice to the Company and the Trustee, may annul
such declaration if (i) the Company has paid or deposited with the Trustee a sum
sufficient to pay (a) all sums paid or advanced by the Trustee, its agents and
counsel under this Indenture and the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 7.7, (b) all overdue interest on all
Notes, (c) to the extent that payment of such interest is lawful, interest upon
overdue interest at the rate borne by the Notes, and (d) principal due otherwise
than by acceleration; and (ii) all Events of Default, other than the non-payment
of principal of the Notes which have become due solely by such declaration of
acceleration, have been cured or waived. Notwithstanding the foregoing, any
acceleration of payment of the Notes from the failure of the Company to make an
interest payment on the Notes during a Blockage Period (an "Acceleration Due to
Blockage") automatically will be rescinded if and when the following conditions
are satisfied within five Business Days following the end of such Blockage
Period: (A) the payment in respect of interest on the Notes, the failure of
which gave rise to such Event of Default, is made; and (B) no other Event of
Default, other than an Event of Default which has occurred solely as a result of
the acceleration of other Debt of the Company or any Subsidiary prior to its
express maturity that was caused solely by an Acceleration Due to Blockage,
shall have occurred and be continuing.
 
     SECTION 6.3.  Other Remedies.
 
     If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy by proceeding at law or in equity to collect the payment of
principal of, premium, if any, or interest on the Notes or to enforce the
performance of any provision of the Notes or this Indenture.
 
     The Trustee may maintain a proceeding even if it does not possess any of
the Notes or does not produce any of them in the proceeding. A delay or omission
by the Trustee or any Holder in exercising any right or remedy accruing upon an
Event of Default shall not impair the right or remedy or constitute a waiver of
or acquiescence in the Event of Default. No remedy is exclusive of any other
remedy. All available remedies are cumulative to the extent permitted by law.
 
     SECTION 6.4.  Waiver of Past Defaults.
 
     Subject to Sections 6.7 and 9.2, the Holders of a majority in aggregate
principal amount of the Notes outstanding may on behalf of the Holders of all
the Notes waive any past defaults under this Indenture and its consequences,
except a default in the payment of the principal of, premium, if any, or
interest on any Note, or
 
                                       32
<PAGE>   40
 
in respect of a covenant or provision which under this Indenture cannot be
modified or amended without the consent of the Holder of each Note outstanding.
 
     SECTION 6.5.  Control by Majority.
 
     The Holders of a majority in aggregate principal amount of the outstanding
Notes may 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 it
including, without limitation, any remedies provided for in Section 6.3. Subject
to Section 7.1, however, the Trustee may refuse to follow any direction that
conflicts with any law or this Indenture, or that the Trustee determines may be
unduly prejudicial to the rights of another Holder, or that may involve the
Trustee in personal liability, PROVIDED that the Trustee may take any other
action deemed proper by the Trustee which is not inconsistent with such
direction.
 
     SECTION 6.6.  Limitation on Suits.
 
     A Noteholder may not pursue any remedy with respect to this Indenture or
the Notes unless:
 
          (a) the Holder gives to the Trustee written notice of a continuing
     Event of Default;
 
          (b) the Holder or Holders of at least 25% in aggregate principal
     amount of the outstanding Notes make a written request to the Trustee to
     pursue the remedy;
 
          (c) such Holders offer to the Trustee reasonable indemnity against any
     loss, liability or expense to be incurred in compliance with such request;
 
          (d) the Trustee does not comply with the request within 60 days after
     receipt of the request and the offer of reasonable indemnity; and
 
          (e) during such 60-day period the Holder or Holders of a majority in
     aggregate principal amount of the outstanding Notes do not give the Trustee
     a direction which, in the opinion of the Trustee, is inconsistent with the
     request.
 
     A Holder may not use this Indenture to prejudice the rights of another
Holder or to obtain a preference or priority over such other Holder.
 
     SECTION 6.7.  Rights of Holders to Receive Payment.
 
     Notwithstanding any other provision of this Indenture, the right of any
Holder to receive payment of principal of, premium, if any, and interest on, a
Note, on or after the respective due dates expressed in such Note, or to bring
suit for the enforcement of any such payment on or after such respective dates,
shall not be impaired or affected without the consent of the Holder.
 
     SECTION 6.8.  Collection Suit by Trustee.
 
     If an Event of Default in payment of principal, premium, if any, or
interest specified in clause (a) or (b) of Section 6.1 occurs and is continuing,
or if any other Event of Default has occurred and the amounts due have been
accelerated, the Trustee may recover judgment in its own name and as trustee of
an express trust against the Company or any other obligor on the Notes for the
whole amount of principal, premium, if any, and accrued interest remaining
unpaid, together with interest on overdue principal and, to the extent that
payment of such interest is lawful, interest on overdue installments of
interest, in each case at the rate per annum borne by the Notes, and 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.
 
     SECTION 6.9.  Trustee May File Proofs of Claim.
 
     The Trustee may file such proofs of claim and other papers or documents as
may be necessary or advisable in order to have the claims of the Trustee
(including any claim for the reasonable compensation, expenses, disbursements
and advances of the Trustee, its agents and counsel) and the Holders allowed in
any judicial proceedings relating to the Company or any other obligor upon the
Notes, any of their respective creditors or any of their respective property and
shall be entitled and empowered to collect and receive any
 
                                       33
<PAGE>   41
 
monies or other property payable or deliverable on any such claims and to
distribute the same, and any custodian in any such judicial proceedings is
hereby authorized by each Holder to make such payments to the Trustee and, in
the event that the Trustee shall consent to the making of such payments directly
to the Holders, to pay to the Trustee any amount due to it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agent and
counsel, and any other amounts due the Trustee under Section 7.7 hereof. Nothing
herein contained shall be deemed to authorize the Trustee to authorize or
consent to or accept or adopt on behalf of any Noteholder any plan of
reorganization, arrangement, adjustment or composition affecting the Notes or
the rights of any Holder thereof, or to authorize the Trustee to vote in respect
of the claim of any Noteholder in any such proceeding.
 
     SECTION 6.10.  Priorities.
 
     If the Trustee collects any money pursuant to this Article Six, it shall
pay out the money in the following order:
 
          First: to the Trustee for amounts due under Section 7.7 hereof and the
     costs and expenses of collection;
 
          Second: to holders of Senior Debt to the extent required by Article
     Eleven hereof;
 
          Third: to Holders for amounts due and unpaid on the Notes for
     principal, premium, if any, and interest, ratably, without preference or
     priority of any kind, according to the amounts due and payable on the Notes
     for principal, premium, if any, and interest, respectively; and
 
          Fourth: to the Company.
 
     The Trustee, upon prior notice to the Company, may fix a record date and
payment date for any payment to Holders pursuant to this Section 6.10.
 
     SECTION 6.11.  Undertaking for Costs.
 
     In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as
Trustee, a court in its discretion may require the filing by any party litigant
in the suit of an undertaking to pay the costs of the suit, and the court in its
discretion may assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant. This Section 6.11
shall not apply to a suit by the Trustee, a suit by a Holder pursuant to Section
6.7 hereof, or a suit by a Holder or Holders of more than 10% in aggregate
principal amount of the outstanding Notes.
 
                                   ARTICLE 7
 
                                    TRUSTEE
 
     SECTION 7.1.  Duties of Trustee.
 
     (1) If an Event of Default has occurred and is continuing, the Trustee,
subject to subparagraph (5) below, shall exercise such of the rights and powers
vested in it by this Indenture, and use the same degree of care and skill in its
exercise, as a prudent person would exercise or use under the circumstances in
the conduct of his or her own affairs.
 
     (2) Except during the continuance of an Event of Default:
 
          (a) The Trustee need perform only those duties that are specifically
     set forth in this Indenture and no others, and no implied covenants or
     obligations shall be read into this Indenture against the Trustee.
 
          (b) 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. However,
     the Trustee shall examine the certificates and opinions to determine
     whether or not they conform to the requirements of this Indenture.
 
                                       34
<PAGE>   42
 
     (3) The Trustee may not be relieved from liabilities for its own negligent
action, its own negligent failure to act, or its own willful misconduct, except
that:
 
          (a) This paragraph does not limit the effect of paragraph (2) of this
     Section 7.1.
 
          (b) The Trustee shall not be liable for any error of judgment made in
     good faith by a Responsible Officer, unless it is proved that the Trustee
     was negligent in ascertaining the pertinent facts.
 
          (c) The Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.5 hereof.
 
     (4) Whether or not therein expressly so provided, every provision of this
Indenture that in any way relates to the Trustee is subject to paragraphs (1),
(2), (3) and (5) of this Section 7.1.
 
     (5) No provision of this Indenture shall require the Trustee to (a) expend
or risk its own funds or otherwise incur any financial liability in the
performance of any of its duties hereunder if it shall have reasonable grounds
for believing that repayment of such funds is not assured to it or it does not
receive reasonable indemnity against such expense, risk or liability or (b) take
or omit to take any action under this Indenture or take any action at the
request or direction of Holders if it does not receive reasonable indemnity
against such risk, liability, loss, fee or expense which might be incurred by it
in compliance with such request or direction.
 
     (6) The Trustee shall not be liable for interest on any money received by
it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law.
 
     SECTION 7.2.  Rights of Trustee.
 
     (1) The Trustee may rely on any document believed by it to be genuine and
to have been signed or presented by the proper Person. The Trustee need not
investigate any fact or matter stated in the document.
 
     (2) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not be
liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. 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.
 
     (3) The Trustee may act through agents or attorneys and shall not be
responsible for the misconduct or negligence of any agent or attorney appointed
with due care.
 
     (4) The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its rights or
powers conferred upon it by this Indenture.
 
     (5) Unless otherwise specifically provided in this Indenture, any demand,
request, direction or notice from the Company shall be sufficient if signed by
an Officer of the Company.
 
     SECTION 7.3.  Individual Rights of Trustee.
 
     The Trustee in its individual or any other capacity may become the owner or
pledgee of Notes and may otherwise deal with the Company or an Affiliate of the
Company with the same rights it would have if it were not Trustee. Any Agent may
do the same with like rights. However, the Trustee is subject to Sections 7.10
and 7.11 hereof.
 
     SECTION 7.4.  Trustee's Disclaimer.
 
     The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Notes, it shall not be accountable for the Company's use of the
proceeds from the Notes or any money paid to the Company or upon the Company's
direction under any provision hereof, it shall not be responsible for the use or
application of any money received by any Paying Agent other than the Trustee and
it shall not be responsible for any statement or recital herein or any statement
in the Notes other than its certificate of authentication.
 
                                       35
<PAGE>   43
 
     SECTION 7.5.  Notice of Defaults.
 
     If a Default or an Event of Default known to the Trustee occurs and is
continuing, the Trustee shall mail to each Noteholder a notice of the Default or
Event of Default within 90 days after it occurs. Except in the case of a Default
in payment on any Note (including the failure to make a mandatory redemption
pursuant hereto), the Trustee may withhold the notice if and so long as a
committee of its Responsible Officers in good faith determines that withholding
the notice is in the interests of Holders. For purposes of Section 6.2, Section
7.1 and this Section 7.5, the Trustee shall not be deemed to have knowledge of a
Default or an Event of Default unless a Responsible Officer has actual knowledge
thereof or unless written notice of such Default or Event of Default is received
by the Trustee and such notice refers to the Notes or this Indenture.
 
     SECTION 7.6.  Reports by Trustee to Holders.
 
     Within 60 days after each May 15 beginning with the May 15 following the
date of this Indenture, the Trustee shall mail to Holders a brief report dated
as of such reporting date that complies with TIA Section 313(a), if such a
report is required pursuant to TIA Section 313(a). The Trustee also shall comply
with TIA Section 313(b). The Trustee shall also transmit by mail all reports as
required by TIA Section 313(c).
 
     Commencing at the time this Indenture is qualified under the TIA, a copy of
each such report at the time of its mailing to Noteholders shall be filed with
the Commission and each stock exchange, if any, on which the Notes are listed.
The Company or any other obligor upon the Notes shall promptly notify the
Trustee if the Notes become listed on any stock exchange or of any delisting
thereof.
 
     SECTION 7.7.  Compensation and Indemnity.
 
     The Company shall pay to the Trustee from time to time reasonable
compensation for its acceptance of this Indenture and services hereunder. The
Trustee's compensation shall not be limited by any law on compensation of a
trustee of an express trust. The Company shall reimburse the Trustee upon
request for all reasonable disbursements, advances and expenses incurred by it
(including the reasonable compensation, disbursements and expenses of the
Trustee's agents and counsel), except as set forth in the fourth paragraph of
this Section 7.7.
 
     The Company shall indemnify the Trustee and its officers, directors,
employees and agents against any loss, liability or expense incurred by the
Trustee or such person arising out of or in connection with the offer and sale
of the Notes or the acceptance or administration of its duties under this
Indenture (including its services of Registrar and Paying Agent), except as set
forth in the fourth paragraph of this Section 7.7. The Trustee shall notify the
Company promptly of any claim asserted against the Trustee for which it may seek
indemnity. The Company shall defend the claim and the Trustee shall cooperate in
the defense. If the Trustee is advised by counsel that its interests conflict
with or are adverse to the Company's, then the Trustee may have separate counsel
and the Company shall pay the reasonable fees and expenses of such counsel. The
Company need not pay for any settlement made without its written consent, which
consent shall not be unreasonably withheld.
 
     The obligations of the Company under this Section 7.7 to compensate and
indemnify the Trustee and its agents and to reimburse the Trustee for its
reasonable expenses shall survive the resignation or removal of the Trustee, the
termination of the Company's obligations hereunder and the satisfaction and
discharge of this Indenture.
 
     The Company need not reimburse any expense or indemnify against any loss or
liability incurred by the Trustee through negligence or willful misconduct,
except to the extent the Trustee has acted in accordance with the standard of
care set forth in clauses (a) and (c) of Section 7.1(3).
 
     To secure the Company's payment obligations in this Section 7.7, the
Trustee shall have a Lien prior to the Notes on all money or property held or
collected by the Trustee, in its capacity as Trustee, except that held in trust
to pay principal, premium, if any, and interest on particular Notes. Such Lien
shall survive the resignation or removal of the Trustee and the satisfaction and
discharge of this Indenture. When the Trustee incurs expenses or renders
services after an Event of Default specified in Section 6.1(e) or (f) occurs,
the
 
                                       36
<PAGE>   44
 
expenses and the compensation for the services shall be preferred over the
status of the Holders in a proceeding under any Bankruptcy Law and are intended
to constitute expenses of administration under any Bankruptcy Law.
 
     SECTION 7.8.  Replacement of Trustee.
 
     A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section.
 
     The Trustee may resign and be discharged from the trust hereby created by
so notifying the Company. The Holders of a majority in principal amount of the
then outstanding Notes may remove the Trustee by so notifying the Trustee and
the Company in writing. The Company may remove the Trustee if:
 
          (1) the Trustee fails to comply with Section 7.10 hereof;
 
          (2) the Trustee is adjudged a bankrupt or an insolvent or an order for
     relief is entered with respect to the Trustee under any Bankruptcy Law;
 
          (3) a custodian or public officer takes charge of the Trustee or its
     property; or
 
          (4) the Trustee becomes incapable of acting.
 
     If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company and any other obligor upon the Notes
shall promptly appoint a successor Trustee. Within one year after the successor
Trustee takes office, the Holders of a majority in principal amount of the then
outstanding Notes may appoint a successor Trustee to replace the successor
Trustee appointed by the Company.
 
     If a successor Trustee does not take office within 30 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least a majority in principal amount of the then outstanding Notes
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.
 
     If the Trustee fails to comply with Section 7.10 hereof, any Holder may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.
 
     A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company. Thereupon the resignation or removal
of the retiring Trustee shall become effective, and the successor Trustee shall
have all the rights, powers and duties of the Trustee under this Indenture. The
successor Trustee shall mail a notice of its succession to each Noteholder. The
retiring Trustee shall promptly transfer all property held by it as Trustee to
the successor Trustee, subject to the Lien provided for in Section 7.7, and all
duties and obligations of the retiring Trustee hereunder shall cease.
 
     SECTION 7.9.  Successor Trustee by Merger, Etc.
 
     If the Trustee consolidates with, merges or converts into, or transfers all
or substantially all of its corporate trust business to, another corporation,
the successor corporation without any further act shall be the successor
Trustee, PROVIDED that such successor is eligible and qualified under this
Article Seven.
 
     SECTION 7.10.  Eligibility; Disqualification.
 
     There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America or of any state thereof authorized under such laws to exercise corporate
trustee powers, shall be subject to supervision or examination by Federal or
state authority and shall have a combined capital and surplus of at least $100.0
million as set forth in its most recent published annual report of condition.
 
     This Indenture shall always have a Trustee which satisfies the requirements
of TIA Sections 310(a)(1). The Trustee is subject to TIA Section 310(a)(5)
concerning inability of a trustee to be a direct or indirect obligor of the
Notes and is subject to TIA Section 310(b) regarding disqualification of a
trustee upon acquiring any conflicting interest. If at any time the Trustee
shall cease to be eligible in accordance with the provisions of this Section,
the Trustee shall resign immediately in the manner and with the effect specified
in
 
                                       37
<PAGE>   45
 
this Article Seven. Nothing contained herein shall prevent the Trustee from
filing the application in TIA Section 310(b) regarding resignation.
 
     SECTION 7.11.  Preferential Collection of Claims Against Company.
 
     The Trustee, in its capacity as Trustee hereunder, is subject to TIA
Section 311(a), subject to the creditor relationship provisions listed in TIA
Section 311(b). A Trustee who has resigned or been removed shall be subject to
TIA Section 311(a) to the extent indicated therein.
 
                                   ARTICLE 8
 
                             DISCHARGE OF INDENTURE
 
     SECTION 8.1.  Legal Defeasance and Covenant Defeasance of the Notes.
 
     (a) The Company may, at its option by resolution of the Board of Directors,
at any time, with respect to the Notes, elect to have either paragraph (b) or
paragraph (c) below be applied to the outstanding Notes upon compliance with the
conditions set forth in paragraph (d).
 
     (b) Upon the Company's exercise under paragraph (a) of the option
applicable to this paragraph (b), the Company shall be deemed to have been
released and discharged from its obligations with respect to the outstanding
Notes on the date the conditions set forth below are satisfied (hereinafter,
"legal defeasance"). For this purpose, such legal defeasance means that the
Company shall be deemed to have paid and discharged the entire indebtedness
represented by the outstanding Notes, which shall thereafter be deemed to be
"outstanding" only for the purposes of the Sections of and matters under this
Indenture referred to in (i) and (ii) below, and to have satisfied all its other
obligations under such Notes and this Indenture insofar as such Notes are
concerned, except for the following which shall survive until otherwise
terminated or discharged hereunder: (i) the rights of Holders of outstanding
Notes to receive solely from the trust fund described in paragraph (d) below and
as more fully set forth in such paragraph, payments in respect of the principal
of, premium, if any, and interest on such Notes when such payments are due and
(ii) obligations listed in Section 8.3.
 
     (c) Upon the Company's exercise under paragraph (a) of the option
applicable to this paragraph (c), the Company shall be released and discharged
from its obligations under any covenant contained in Section 5.1 hereof and in
Sections 4.3 through 4.17 hereof (subject to compliance with the Company's
obligations under the TIA), with respect to the outstanding Notes on and after
the date the conditions set forth below are satisfied (hereinafter, "covenant
defeasance"), and the Notes shall thereafter be deemed to be not "outstanding"
for the purpose of any direction, waiver, consent, declaration or act of Holders
(and the consequences of any thereof) in connection with such covenants, but
shall continue to be deemed "outstanding" for all other purposes hereunder. For
this purpose, such covenant defeasance means that, with respect to the
outstanding Notes, the Company may omit to comply with and shall have no
liability in respect of any term, condition or limitation set forth in any such
covenant, whether directly or indirectly, by reason of any reference elsewhere
herein to any such covenant or by reason of any reference in any such covenant
to any other provision herein or in any other document and such omission to
comply shall not constitute a Default or an Event of Default under Section
6.1(c), nor shall any event referred to in Section 6.1(f) thereafter constitute
a Default or an Event of Default thereunder but, except as specified above, the
remainder of this Indenture and such Notes shall be unaffected thereby.
 
     (d) The following shall be the conditions to application of either
paragraph (b) or paragraph (c) above to the outstanding Notes:
 
          (1) The Company shall have irrevocably deposited in trust with the
     Trustee, pursuant to an irrevocable trust and security agreement in form
     and substance satisfactory to the Trustee, cash or U.S. Government
     Obligations maturing as to principal and interest at such times, or a
     combination thereof, in such amounts as are sufficient, without
     consideration of the reinvestment of such interest and after payment of all
     Federal, state and local taxes or other charges or assessments in respect
     thereof payable by the Trustee, in the opinion of a nationally recognized
     firm of independent public accountants
 
                                       38
<PAGE>   46
 
     expressed in a written certification thereof (in form and substance
     reasonably satisfactory to the Trustee) delivered to the Trustee, to pay
     the principal of, premium, if any, and interest on the outstanding Notes on
     the dates on which any such payments are due and payable in accordance with
     the terms of this Indenture and of the Notes;
 
          (2)(i) No Event of Default or Default shall have occurred and be
     continuing on the date of such deposit, and (ii) no Default or Event of
     Default under Section 6.1(e) or 6.1(f) shall occur on or before the 123rd
     day after the date of such deposit;
 
          (3) Such deposit will not result in a Default under this Indenture or
     a breach or violation of, or constitute a default under, any other
     instrument or agreement to which the Company is a party or by which it or
     its property is bound;
 
          (4) No default on any Senior Debt shall have occurred and be
     continuing;
 
          (5) In the case of a legal defeasance under paragraph (b) above, the
     Company shall have delivered to the Trustee an Opinion of Counsel stating
     that (a) the Company has received from, or there has been published by, the
     Internal Revenue Service a ruling, or (b) 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 Notes will not recognize income, gain or loss for
     Federal income tax purposes as a result of such deposit, defeasance and
     discharge and will be subject to Federal income tax on the same amount, in
     the same manner and at the same times as would have been the case if such
     deposit, defeasance and discharge had not occurred; and, in the case of a
     covenant defeasance under paragraph (c) above, the Company shall have
     delivered to the Trustee an Officers' Certificate and an Opinion of
     Counsel, in form and substance reasonably satisfactory to the Trustee, to
     the effect that Holders of the Notes will not recognize income, gain or
     loss for Federal income tax purposes as a result of such deposit and
     defeasance and will be subject to Federal income tax on the same amount, in
     the same manner and at the same times as would have been the case if such
     deposit and defeasance had not occurred;
 
          (6) The Holders shall have a perfected security interest under
     applicable law in the cash or U.S. Government Obligations deposited
     pursuant to Section 8.1(d)(1) above, or such cash or U.S. Government
     Obligations shall be held in irrevocable trust for the benefit of all
     Holders;
 
          (7) The Company shall have delivered to the Trustee an Opinion of
     Counsel, in form and substance reasonably satisfactory to the Trustee, to
     the effect that (i) after the passage of 123 days following the deposit,
     the trust funds will not be subject to any applicable bankruptcy,
     insolvency, reorganization or similar law affecting creditors' rights
     generally, and (ii) neither the Company, the Trustee nor the trust is an
     investment company under the Investment Company Act of 1940, or has been
     registered as an investment company; and
 
          (8) The Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, each stating that all conditions precedent
     specified herein relating, to the defeasance contemplated by this Section
     8.1 have been complied with; PROVIDED, HOWEVER, that no deposit under
     clause (1) above shall be effective to terminate the obligations of the
     Company under the Notes or this Indenture prior to 123 days following any
     such deposit.
 
     In connection with the issuance of debt securities the proceeds of which
will be used to redeem all the Notes then outstanding, none of Section 4.9,
4.10, 4.11 or 4.12 hereof shall be violated by the issuance of such debt
securities to the extent the Company complies with all of the provisions of this
Section 8.1(d) other than Section 8.1(d)(2)(ii) hereof. The Company and the
Trustee shall use their best efforts to ensure that the deposit referred to in
Section 8.1(d)(1) hereof does not result in the Company, the Trustee or the
trust becoming or being deemed an investment company under the Investment
Company Act of 1940. In the event that such deposit does result in the Company,
the Trustee or the trust becoming, or being deemed an investment company, the
Company shall bear all related expenses of registration and reporting under the
Investment Company Act of 1940 for the duration of the trust.
 
                                       39
<PAGE>   47
 
     SECTION 8.2.  Termination of Obligations Upon Cancellation of the Notes.
 
     In addition to the Company's rights under Section 8.1 hereof, the Company
may terminate all of its obligations under this Indenture (subject to Sections
8.3 and 8.7 hereof) when:
 
          (1) all Notes theretofore authenticated and delivered (other than
     Notes which have been destroyed, lost or stolen and which have been
     replaced or paid as provided in Section 2.10) hereof have been delivered to
     the Trustee for cancellation;
 
          (2) the Company has paid or caused to be paid all other sums payable
     hereunder and under the Notes by the Company; and
 
          (3) the Company has delivered to the Trustee an Officers' Certificate,
     stating that all conditions precedent specified herein relating to the
     satisfaction and discharge of this Indenture have been complied with.
 
     SECTION 8.3.  Survival of Certain Obligations.
 
     Notwithstanding the satisfaction and discharge of this Indenture and of the
Notes referred to in Sections 8.1 or 8.2 hereof, the respective obligations of
the Company, and the Trustee under Sections 2.3, 2.4, 2.5, 2.6, 2.10, 2.17, 4.2,
6.7, 7.7, 7.8, 8.5, 8.6 and 8.7 hereof shall survive until the Notes are no
longer outstanding, and thereafter the obligations of the Company and the
Trustee under Sections 7.7, 8.5, 8.6 and 8.7 hereof shall survive. Nothing
contained in this Article Eight shall abrogate any of the obligations or duties
of the Trustee under this Indenture.
 
     SECTION 8.4.  Acknowledgment of Discharge by Trustee.
 
     Subject to Section 8.7 hereof, after (i) the conditions of Sections 8.1 or
8.2 hereof have been satisfied, (ii) the Company has paid or caused to be paid
all other sums payable hereunder by the Company and (iii) the Company has
delivered to the Trustee an Officers' Certificate and an Opinion of Counsel,
each stating that all conditions precedent referred to in clause (i) above
relating to the satisfaction and discharge of this Indenture have been complied
with, the Trustee upon written request shall acknowledge in writing the
discharge of the Company's obligations under this Indenture except for those
surviving obligations specified in Section 8.3 hereof.
 
     SECTION 8.5.  Application of Trust Assets.
 
     The Trustee shall hold any cash or U.S. Government Obligations deposited
with it in the irrevocable trust established pursuant to Section 8.1 hereof. The
Trustee shall apply the deposited cash or the U.S. Government Obligations,
together with earnings thereon, through the Paying Agent, in accordance with
this Indenture and the terms of the irrevocable trust agreement established
pursuant to Section 8.1 hereof, to the payment of principal of, premium, if any,
and interest on the Notes. The cash or U.S. Government Obligations so held in
trust and deposited with the Trustee in compliance with Section 8.1 hereof,
shall not be part of the trust estate under this Indenture, but shall constitute
a separate trust fund for the benefit of all Holders entitled thereto.
 
     SECTION 8.6.  Repayment to the Company; Unclaimed Money.
 
     Upon termination of the trust established pursuant to Section 8.1, the
Trustee and the Paying Agent shall promptly pay to the Company upon request any
excess cash or U.S. Government Obligations held by them. Additionally, the
Trustee and the Paying Agent shall pay to the Company upon request, and, if
applicable, in accordance with the irrevocable trust established pursuant to
Section 8.1, any cash or U.S. Government Obligations held by them for the
payment of principal of, premium, if any, or interest on the Notes that remain
unclaimed for two years after the date on which such payment shall have become
due unless otherwise required by law. After payment to the Company, all
liability of the Trustee and such Paying Agent with respect to such cash or U.S.
Government Obligations shall cease and Holders entitled to such payment must
look to the Company for such payment as general creditors unless an applicable
abandoned property law expressly provides otherwise.
 
                                       40
<PAGE>   48
 
     SECTION 8.7.  Reinstatement.
 
     If the Trustee or Paying Agent is unable to apply any cash or U.S.
Government Obligations in accordance with Section 8.1 by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application, the
Company's obligations under this Indenture and the Notes shall be revived and
reinstated as though no deposit had occurred pursuant to Section 8.1 until such
time as the Trustee or Paying Agent is permitted to apply all such cash or U.S.
Government Obligations in accordance with Section 8.1, PROVIDED that if the
Company makes any payment of principal of, premium, if any, or interest on any
Notes following the reinstatement of its obligations, the Company shall be
subrogated to the rights of the Holders of such Notes to receive such payment
from the cash or U.S. Government Obligations, and proceeds thereof, held by the
Trustee or the Paying Agent.
 
                                   ARTICLE 9
 
                                   AMENDMENTS
 
     SECTION 9.1.  Without Consent of Holders.
 
     The Company, when authorized by a resolution of the Board of Directors, and
the Trustee, together, may amend or supplement this Indenture or the Notes
without the consent of any Noteholder:
 
          (1) to cure any ambiguity, defect or inconsistency, PROVIDED that such
     amendment or supplement does not adversely affect the rights of any Holder;
 
          (2) to comply with Section 5.1;
 
          (3) to comply with any requirements of the Commission in connection
     with the qualification of this Indenture under the TIA as then in effect;
 
          (4) to make any change that does not adversely affect the legal rights
     hereunder of any Noteholder;
 
          (5) to evidence or to provide for a replacement Trustee under Section
     7.8; or
 
          (6) to add to the covenants and agreements of the Company for the
     benefit of the Holders and to surrender any right or power herein reserved
     to the Company, PROVIDED that, except in the case of clause (5) above, the
     Company has delivered to the Trustee an Opinion of Counsel and an Officers'
     Certificate, each stating that such amendment or supplement complies with
     the provisions of this Section 9.1.
 
     Upon the written request of the Company, accompanied by a resolution of the
Board of Directors authorizing the execution of any supplemental Indenture, and
upon receipt by the Trustee of the documents described in Section 9.6 hereof,
the Trustee shall join with the Company in the execution of any supplemental
Indenture authorized or permitted by the terms of this Indenture and to make any
further appropriate agreements and stipulations which may be therein contained,
but the Trustee shall not be obligated to enter into such supplemental Indenture
which affects its own rights, duties or immunities under this Indenture or
otherwise.
 
     SECTION 9.2. With Consent of Holders.
 
     The Company, when authorized by a resolution of the Board of Directors, and
the Trustee, together, may amend this Indenture or the Notes with the written
consent of the Holders of a majority in aggregate principal amount of the then
outstanding Notes. The Holders of a majority in aggregate principal amount of
the Notes then outstanding may, or the Trustee with the written consent of the
Holders of a majority in aggregate principal amount of the then outstanding
Notes may, waive compliance in a particular instance by the Company with any
provision of this Indenture or the Notes. This paragraph of this Section 9.2 is
subject to Sections 6.4 and 6.7.
 
                                       41
<PAGE>   49
 
     Upon the written request of the Company, accompanied by a resolution of the
Board of Directors authorizing the execution of any such supplemental Indenture,
and upon the filing with the Trustee of evidence of the consent of the Holders
as aforesaid, and upon receipt by the Trustee of the documents described in
Section 9.6 hereof, the Trustee shall join with the Company in the execution of
such supplemental Indenture but the Trustee shall not be obligated to enter into
such supplemental Indenture which affects its own rights, duties or immunities
under this Indenture or otherwise.
 
     It shall not be necessary for the consent of the Holders under this Section
9.2 to approve the particular form of any proposed amendment or waiver, but it
shall be sufficient if such consent approves the substance thereof.
 
     After an amendment or waiver under this Section becomes effective, the
Company shall mail to each Holder of the Notes affected thereby a notice briefly
describing the amendment or waiver. Any failure of the Company to mail such
notice, or any defect therein, shall not, however, in any way impair or affect
the validity of any such supplemental Indenture.
 
     Notwithstanding the first paragraph of this Section 9.2, without the
consent of each Holder affected, an amendment or waiver under this Section may
not:
 
          (1) reduce the percentage of aggregate principal amount of Notes whose
     Holders must consent to an amendment, supplement or waiver;
 
          (2) reduce the percentage of aggregate principal amount of outstanding
     Notes whose Holders must consent to a modification or amendment of this
     Indenture or for waiver of Events of Default or Defaults provided for in
     this Indenture;
 
          (3) reduce the principal amount of (or the premium, if any, of) or
     interest on any Note or change the Stated Maturity of the principal of, or
     any installment of interest on, Notes;
 
          (4) reduce the Redemption Price, including premium, if any, payable
     upon redemption or repurchase of any Note or change the time at which any
     Note may or shall be redeemed or repurchased;
 
          (5) reduce the rate or change the time, place or currency of payment
     of principal of, premium, if any, or interest (including defaulted
     interest) on, any Note;
 
          (6) impair the right to institute suit for the enforcement of any
     payment of principal of, premium, if any, or interest on, any Note;
 
          (7) waive a continuing past Default or Event of Default in the payment
     of principal of, premium, if any, or interest on, the Notes;
 
          (8) modify any of the provisions of this Indenture relating to the
     subordination of the Notes in a manner adverse to Holders of the Notes;
 
          (9) modify any of the provisions of this Indenture relating to the
     modification and amendment of this Indenture or the waiver of past defaults
     or covenants; or
 
          (10) following the mailing of an offer with respect to a Change of
     Control Offer as described under Section 4.17 or an offer to purchase as
     described under Section 4.15, modify this Indenture with respect to such
     Change of Control Offer or offer to purchase in a manner adverse to such
     Holders.
 
     SECTION 9.3. Compliance with Trust Indenture Act.
 
     Every amendment to or supplement of this Indenture or the Notes shall
comply with the TIA as then in effect.
 
     SECTION 9.4.  Revocation and Effect of Consents.
 
     Until an amendment or waiver becomes effective, a consent to it by a Holder
of a Note is a continuing consent by the Holder and every subsequent Holder of a
Note or portion of a Note that evidences the same debt as the consenting
Holder's Note, even if notation of the consent is not made on any Note. However,
any
 
                                       42
<PAGE>   50
 
such Holder or subsequent Holder may revoke the consent as to his or her Note or
portion of a Note if the Trustee receives written notice of revocation before
the date the amendment or waiver becomes effective.
 
     The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to consent to any Act of Holders,
including any amendment, supplement or waiver. If a record date is fixed, those
Persons who were Holders at such record date (or their duly designated proxies),
and only those Persons, shall be entitled to consent to such Act of Holders,
including an amendment, supplement or waiver, or to revoke any consent
previously given, whether or not such Persons continue to be Holders after such
record date. No such consent shall be valid or effective for more than 90 days
after such record date. After an Act of Holders, including an amendment,
supplement or waiver becomes effective, it shall bind every Noteholder, unless
it is an amendment, supplement or waiver that makes a change described in any of
clauses (1) through (10) of Section 9.2, in which case the amendment, supplement
or waiver shall bind only each Holder of a Note who has consented to it and
every subsequent Holder of a Note or portion of a Note that evidences the same
debt as the consenting Holder's Note, PROVIDED, that any such waiver shall not
impair or affect the right of any Holder to receive payment of principal of and
interest on a Note, on or after the respective due dates expressed in such Note,
or to bring suit for the enforcement of any such payment on or after such
respective dates without the consent of such Holder.
 
     SECTION 9.5.  Notation on or Exchange of Notes.
 
     If an amendment, supplement or waiver changes the terms of a Note, the
Trustee may require the Holder of the Note to deliver it to the Trustee. The
Trustee may place an appropriate notation on the Note about the changed terms
and return it to the Holder. Alternatively, if the Company or the Trustee so
determines, the Company in exchange for the Note shall issue and the Trustee
shall authenticate a new Note that reflects the changed terms. Failure to make
the appropriate notation or issue a new Note shall not affect the validity and
effect of such amendment, supplement or waiver.
 
     SECTION 9.6.  Trustee to Sign Amendments, Etc.
 
     The Trustee shall sign any amendment, waiver or supplemental Indenture
authorized pursuant to this Article Nine if the amendment does not adversely
affect the rights, duties, liabilities or immunities of the Trustee. If it does,
the Trustee may, but need not, sign it. In signing or refusing to sign such
amendment, waiver, or supplemental Indenture, the Trustee shall be entitled to
receive and, subject to Section 7.1, shall be fully protected in relying upon,
an Officers' Certificate and an Opinion of Counsel as conclusive evidence that
such amendment, waiver or supplemental Indenture is authorized or permitted by
this Indenture, that it is not inconsistent herewith, and that it will be valid
and binding upon the Company in accordance with its terms.
 
                                   ARTICLE 10
 
                            MEETINGS OF NOTEHOLDERS
 
     SECTION 10.1.  Purposes for Which Meetings May Be Called.
 
     A meeting of Noteholders may be called at any time and from time to time
pursuant to the provisions of this Article Ten for any of the following
purposes:
 
     (a) to give any notice to the Company or to the Trustee, or to give any
directions to the Trustee, or to waive or to consent to the waiving of any
Default or Event of Default hereunder and its consequences, or to take any other
action authorized to be taken by Noteholders pursuant to any of the provisions
of Article Six hereof;
 
     (b) to remove the Trustee or appoint a successor Trustee pursuant to the
provisions of Article Seven hereof;
 
     (c) to consent to an amendment, supplement or waiver pursuant to the
provisions of Section 9.2 hereof; or
 
                                       43
<PAGE>   51
 
     (d) to take any other action authorized to be taken by or on behalf of the
Holders of any specified aggregate principal amount of the Notes under any other
provision of this Indenture, or authorized or permitted by law.
 
     SECTION 10.2.  Manner of Calling Meetings.
 
     The Trustee may at any time call a meeting of Noteholders to take any
action specified in Section 10.1 hereof, to be held at such time and at such
place in The City of New York, New York or elsewhere as the Trustee shall
determine. Notice of every meeting of Noteholders, setting forth the time and
place of such meeting and in general terms the action proposed to be taken at
such meeting, shall be mailed by the Trustee, first-class postage prepaid, to
the Company and to the Holders at their last addresses as they shall appear on
the registration books of the Registrar not less than 10 nor more than 60 days
prior to the date fixed for such meeting.
 
     Any meeting of Noteholders shall be valid without notice if the Holders of
all Notes then outstanding are present in person or by proxy, or if notice is
waived before or after the meeting by the Holders of all Notes outstanding, and
if the Company and the Trustee are either present by duly authorized
representatives or have, before or after the meeting, waived notice.
 
     SECTION 10.3. Call of Meetings by Company or Holders.
 
     In case at any time the Company, pursuant to a resolution of the Board of
Directors, or the Holders of not less than 10% in aggregate principal amount of
the Notes then outstanding shall have requested the Trustee to call a meeting of
Noteholders to take any action specified in Section 10.1 hereof, by written
request setting forth in reasonable detail the action proposed to be taken at
such meeting, and the Trustee shall not have mailed the notice of such meeting
within 20 days after receipt of such request, then the Company or the Holders of
Notes in the amount above specified may determine the time and place in The City
of New York, New York or elsewhere for such meeting and may call such meeting
for the purpose of taking such action, by mailing or causing to be mailed notice
thereof as provided in Section 10.2 hereof, or by causing notice thereof to be
published at least once in each of two successive calendar weeks (on any
Business Day during such week) in a newspaper or newspapers printed in the
English language, customarily published at least five days a week of a general
circulation in The City of New York, State of New York and, in the event the
Notes are listed on the Luxembourg Stock Exchange, in Luxembourg, the first such
publication to be not less than 10 days nor more than 60 days prior to the date
fixed for such meeting.
 
     SECTION 10.4. Who May Attend and Vote at Meetings.
 
     To be entitled to vote at any meeting of Noteholders, a Person shall (a) be
a registered Holder of one or more Notes, or (b) be a Person appointed by an
instrument in writing as proxy for the registered Holder or Holders of Notes.
The only Persons who shall be entitled to be present or to speak at any meeting
of Noteholders shall be the Persons entitled to vote at such meeting and their
counsel, any representatives of the Trustee and its counsel, and any
representatives of the Company and its counsel.
 
     SECTION 10.5. Regulations May Be Made by Trustee; Conduct of the Meeting;
                   Voting Rights; Adjournment.
 
     Notwithstanding any other provision of this Indenture, the Trustee may make
such reasonable regulations as it may deem advisable for any action by or any
meeting of Noteholders, in regard to proof of the holding of Notes and of the
appointment of proxies, and in regard to the appointment and duties of
inspectors of votes, and submission and examination of proxies, certificates and
other evidence of the right to vote, and such other matters concerning the
conduct of such meeting as it shall think appropriate. Such regulations may fix
a record date and time for determining the Holders of record of Notes entitled
to vote at such meeting, in which case those and only those persons who are
Holders of Notes at the record date and time so fixed, or their proxies, shall
be entitled to vote at such meeting whether or not they shall be Holders at the
time of such meeting.
 
                                       44
<PAGE>   52
 
     The Trustee shall, by an instrument in writing, appoint a temporary
chairperson of the meeting, unless the meeting shall have been called by the
Company or by Noteholders as provided in Section 10.3 hereof, in which case the
Company or the Noteholders calling the meeting, as the case may be, shall in
like manner appoint a temporary chairperson. A permanent chairperson and a
permanent secretary of the meeting shall be elected by vote of the Holders of a
majority in aggregate principal amount of the Notes represented at the meeting
and entitled to vote.
 
     At any meeting, each Noteholder or proxy shall, subject to the provisions
of Section 10.4 hereof, be entitled to one vote for each $1,000 in principal
amount of Notes held or represented by him or her; PROVIDED, HOWEVER, that no
vote shall be cast or counted at any meeting in respect of any Notes challenged
as not outstanding and ruled by the chairperson of the meeting to be not
outstanding. The chairperson may adjourn any such meeting if he or she is unable
to determine whether any Holder or proxy shall be entitled to vote at such
meeting. The chairperson of the meeting shall have no right to vote other than
by virtue of Notes held by him or her or instruments in writing as aforesaid
duly designating him or her as the proxy to vote on behalf of other Noteholders.
Any meeting of Noteholders duly called pursuant to the provisions of Section
10.2 or 10.3 hereof may be adjourned from time to time by vote of the Holders of
a majority in aggregate principal amount of the Notes represented at such
meeting and entitled to vote, and such meeting may be held as so adjourned
without further notice.
 
     SECTION 10.6. Voting at the Meeting and Record to Be Kept.
 
     Any vote upon any resolution submitted to any meeting of Noteholders shall
be by written ballots on which shall be subscribed the signatures of the Holders
of Notes or of their representatives by proxy and the principal amount of the
Notes voted by the ballots. The permanent chairperson of the meeting shall
appoint two inspectors of votes, who shall count all votes cast at such meeting
for or against any resolution and shall make and file with the secretary of the
meeting their verified written reports in duplicate of all votes cast at the
meeting. A record in duplicate of the proceedings of each meeting of Noteholders
shall be prepared by the secretary of the meeting and there shall be attached to
such record the original reports of the inspectors of votes on any vote by
ballot taken thereat and affidavits by one or more persons having knowledge of
the facts, setting forth a copy of the notice of the meeting and showing that
such notice was mailed as provided in Section 10.2 hereof. The record shall be
signed and verified by the affidavits of the permanent chairperson and the
secretary of the meeting and one of the duplicates shall be delivered to the
Company and the other to the Trustee to be preserved by the Trustee, the latter
to have attached thereto the ballots voted at the meeting. Any record so signed
and verified shall be conclusive evidence of the matters therein stated and any
such vote shall constitute an Act of the Holders.
 
     SECTION 10.7. Exercise of Rights of Trustee or Noteholders May Not Be
                   Hindered or Delayed by Call of Meeting.
 
     Nothing contained in this Article Ten shall be deemed or construed to
authorize or permit, by reason of any call of a meeting of Noteholders or any
rights expressly or impliedly conferred hereunder to make such call, any
hindrance or delay in the exercise of any right or rights conferred upon or
reserved to the Trustee or to the Noteholders under any of the provisions of
this Indenture or of the Notes.
 
     SECTION 10.8.  Procedures Not Exclusive.
 
     The procedures set forth in this Article Ten are not exclusive and the
rights and obligations of the Company, the Trustee and the Holders under other
Articles of this Indenture (including, without limitation, Section 1.5 and
Articles 6, 7, 8 and 9) shall in no way be limited by the provisions of this
Article Ten.
 
                                       45
<PAGE>   53
 
                                   ARTICLE 11

                                 SUBORDINATION
 
     SECTION 11.1.  Notes Subordinated to Senior Debt.
 
     Notwithstanding the provisions of Sections 6.2 and 6.3, the Company
covenants and agrees, and the Trustee and each Holder of the Notes by his or her
acceptance thereof likewise covenants and agrees, that all payments of the
principal of, premium, if any, and interest on the Notes by the Company shall be
subordinated in accordance with the provisions of this Article Eleven to the
prior payment in full of all amounts payable under existing and future Senior
Debt of the Company.
 
     The Company also covenants and agrees not to Incur any Debt that is both
(a) subordinate or junior in right of payment to any Senior Debt of the Company
and (b) senior in any respect in right of payment to the Notes.
 
     SECTION 11.2.  Priority and Payment Over of Proceeds in Certain Events.
 
     (a) Subordination on Dissolution, Liquidation or Reorganization of the
Company.  In the event of any insolvency or bankruptcy case or proceeding, or
any receivership, liquidation, reorganization or other similar case or
proceeding in connection therewith, relative to the Company or to its assets, or
any liquidation, dissolution or other winding up of the Company, whether
voluntary or involuntary, or any assignment for the benefit of creditors or
other marshalling of assets or liabilities of the Company (except in connection
with the consolidation or merger of the Company or its liquidation or
dissolution following the conveyance, transfer or lease of its properties
substantially as an entirety, upon the terms and conditions described under
Article Five hereof), all Senior Debt due and owing (including, in the case of
Designated Senior Debt and Senior Debt under the Credit Facility, interest
accruing after the commencement of any such case or proceeding at the rate
specified in the instrument evidencing such Senior Debt, whether or not a claim
therefor is allowed in such proceeding, to the date of payment of such Senior
Debt) must be paid in full before any payment or distribution of any assets of
the Company of any kind or character (excluding shares of Capital Stock of the
Company or securities of the Company provided for in a plan of reorganization or
readjustment which are subordinate in right of payment to all Senior Debt to
substantially the same extent as the Notes are so subordinated) is made on
account of principal of, premium, if any, or interest on, the Notes, including
repurchase, purchase, redemption or other acquisition of the Notes. Before any
payment may be made by the Company of the principal of, premium, if any, or
interest on the Notes, and upon any such dissolution or winding up or
liquidation or reorganization, any payment or distribution of assets or
securities of the Company of any kind or character, whether in cash, property or
securities, to which the Holders or the Trustee on their behalf would be
entitled, except for the provisions of this Article Eleven, shall be made by the
Company or by any receiver, trustee in bankruptcy, liquidating trustee, agent or
other person making such payment or distribution, directly to the holders of the
Senior Debt of the Company or any Senior Representatives thereof to the extent
necessary to pay all such Senior Debt in full after giving effect to any
concurrent payment or distribution to the holders of such Senior Debt.
 
     (b) Subordination on Default in Senior Debt.  During the continuance of any
default in the payment when due of principal of, reimbursement obligation under,
premium, if any, or interest on, any Senior Debt, including without limitation
any default in the payment when due of any commitment or facility fees, letter
of credit fees or agency fees under the Credit Facility, or any default in
payment when due of any reimbursement obligation of the Company with respect to
any letter of credit issued under the Credit Facility (a "Senior Payment
Default"), no direct or indirect payment or distribution of any assets of the
Company of any kind or character may be made on account of the principal of,
premium, if any, interest on, or other amounts payable in respect of, the Notes
or on account of the purchase, redemption or other acquisition of or in respect
of the Notes unless and until such Senior Payment Default has been cured, waived
or has ceased to exist or such Senior Debt shall have been discharged or paid in
full or when the right under this Indenture to prevent any such payment is
waived by or on behalf of the holders of such Senior Debt.
 
     During the continuance of any default (other than a Senior Payment Default)
with respect to the Credit Facility or any Designated Senior Debt, the
occurrence of which entitles, or with the giving of notice or lapse
 
                                       46
<PAGE>   54
 
of time (or both) would entitle, one or more Persons to accelerate the maturity
thereof (a "Senior Nonmonetary Default") pursuant to which the Trustee and the
Company have received from the agent bank for the Credit Facility or from any
authorized person on behalf of any Designated Senior Debt a written notice of
such Senior Nonmonetary Default, no direct or indirect payment or distribution
of any assets of the Company of any kind or character may be made on account of
the principal of, premium, if any, or interest on, or other amounts payable in
respect of, the Notes or on account of the purchase, redemption or other
acquisition of, or in respect of, the Notes for the period specified below (the
"Blockage Period").
 
     The Blockage Period shall commence upon the receipt of notice of a Senior
Nonmonetary Default by the Trustee and the Company and shall end (subject to any
blockage of payment that may be in effect in respect of a Senior Payment Default
or insolvency) on the earlier of (i) 179 days after the receipt of such notice,
provided such Senior Debt shall not theretofore have been accelerated and no
Senior Payment Default shall be in effect; and (ii) the date on which such
Senior Nonmonetary Default is cured, waived or ceases to exist or such Senior
Debt is discharged or paid in full. In no event will a Blockage Period extend
beyond 179 days from the date of the receipt by the Trustee and the Company of
the notice initiating such Blockage Period. Any number of notices of a Senior
Nonmonetary Default may be given during a Blockage Period, PROVIDED, that no
such notice shall extend such Blockage Period, only one Blockage Period may be
commenced within any 360-day period and there shall be a period of at least 181
consecutive days in each period of 360 consecutive days when no Blockage Period
is in effect. No Senior Nonmonetary Default with respect to Senior Debt that
existed or was continuing on the date of the commencement of any Blockage Period
and that was known to the holders of or the Senior Representative for such
Senior Debt will be, or can be, made the basis for the commencement of a
subsequent Blockage Period, whether or not within a period of 360 consecutive
days, unless such Senior Nonmonetary Default has been cured or waived for a
period of not less than 90 consecutive days. The Company shall deliver an
Officers' Certificate to the Trustee promptly after the date on which any Senior
Nonmonetary Default is cured or waived or ceases to exist or on which the Senior
Debt related thereto is discharged or paid in full.
 
     (c) Rights and Obligations of Holders of Notes and Trustee.  In the event
that, notwithstanding the foregoing provisions prohibiting such payment or
distribution, the Trustee or any Holder shall have received any payment on
account of the principal of, premium, if any, or interest on the Notes at a time
when such payment is prohibited by this Section 11.2 and before the principal
of, premium, if any, and interest on Senior Debt is paid in full, then and in
such event (subject to the provisions of Section 11.8) such payment or
distribution shall be received and held in trust for the holders of Senior Debt
and shall be paid over or delivered to the holders of the Senior Debt (or to
their Senior Representatives in the case of Designated Senior Debt) remaining
unpaid promptly at the written direction of such holders of Senior Debt or their
designees to the extent necessary to pay in full the principal of, premium, if
any, and interest on such Senior Debt in accordance with its terms after giving
effect to any concurrent payment or distribution to the holders of such Senior
Debt.
 
     Nothing contained in this Article Eleven will limit the right of the
Trustee or the Holders of Notes to take any action to accelerate the maturity of
the Notes pursuant to Section 6.2 hereof or to pursue any rights or remedies
hereunder against the Company, PROVIDED, that, to the extent provided in this
Article Eleven, all Senior Debt of the Company then or thereafter due or
declared to be due shall first be paid in full before the Holders or the Trustee
are entitled to receive any payment from the Company of principal of, premium,
if any, or interest on the Notes.
 
     Upon any payment or distribution of assets or Notes referred to in this
Article Eleven, the Trustee and the Holders shall be entitled to rely upon any
order or decree of a court of competent jurisdiction in which such dissolution,
winding up, liquidation or reorganization proceedings are pending, and upon any
certificate of the receiver, trustee in bankruptcy, liquidating trustee, agent
or other person making any such payment or distribution delivered to the
Trustee, for the purpose of ascertaining the persons entitled to participate in
such distribution, the holders of Senior Debt and other Debt of the Company, the
amount thereof or payable thereon, the amount or amounts paid or distributed
thereon and all other facts pertinent thereto or to this Article Eleven. In the
absence of such order, decree or certificate, the Trustee and the Holders shall
be entitled to request and rely upon an Officers' Certificate from the Company.
The Company shall provide to the
 
                                       47
<PAGE>   55
 
Trustee, in the form of an Officers' Certificate, the names and addresses of the
holders of such Senior Debt, the amount of the Senior Debt outstanding to each
such holder of Senior Debt and any necessary information to calculate the daily
increase in indebtedness to such holders of Senior Debt. The Trustee shall be
entitled to rely conclusively on any such order, decree or certificate
(including any such Officers' Certificate) in making any disbursements to the
holders of Senior Debt, without making any independent verification of the
information contained therein.
 
     SECTION 11.3.  Payments May Be Made Prior to Notice.
 
     Nothing contained in this Article Eleven or elsewhere in this Indenture
shall prevent (i) the Company, except under the conditions described in Section
11.2 hereof, from making payments at any time of principal of, premium, if any,
and interest on, the Notes, or from depositing with the Trustee any monies for
such payments or (ii) the application by the Trustee of any monies deposited
with it for the purpose of making such payments of principal of, premium, if
any, and interest on, the Notes, to the Holders entitled thereto, unless by noon
Eastern time one Business Day prior to the date upon which such payment would
otherwise (except for the prohibitions contained in Section 11.2 hereof) become
due and payable, the Trustee shall have received the written notice provided for
in Section 11.2(b) hereof (or there shall have been an acceleration of the Notes
prior to such application), subject to Section 11.8 hereof.
 
     SECTION 11.4. Rights of Holders of Senior Debt Not to Be Impaired.
 
     No right of any present or future holder of any Senior Debt to enforce
subordination as herein provided shall at any time in any way be prejudiced or
impaired by any act or failure to act in good faith by any such holder, or by
any noncompliance by the Company with the terms and provisions and covenants
herein, regardless of any knowledge thereof any such holder may have or
otherwise be charged with.
 
     The provisions of this Article Eleven are intended to be for the benefit
of, and shall be enforceable directly by, the holders of Senior Debt.
 
     SECTION 11.5. Authorization to Trustee to Take Action to Effectuate
                   Subordination.
 
     Each Holder of Notes by his or her acceptance thereof authorizes and
directs the Trustee on his or her behalf to take such action as may be necessary
or appropriate to effectuate, as between the holders of Senior Debt and the
Holders, the subordination as provided in this Article Eleven and appoints the
Trustee his or her attorney-in-fact for any and all such purposes. Whenever a
distribution is to be made or a notice given to holders of Senior Debt, the
distribution or notice may be made to the Senior Representatives and agents of
such holders of Senior Debt as such agents or representatives are identified by
such holders in writing to the Trustee. If the Trustee does not file a proper
claim or proof of debt in the form required in such proceeding prior to 30 days
before the expiration of the time to file such claim or claims, then the holders
of Senior Debt are hereby authorized to have the right to file and are hereby
authorized to file an appropriate claim for and on behalf of such holders.
 
     SECTION 11.6.  Subrogation.
 
     Subject to the payment in full of all amounts payable under or in respect
of Senior Debt, the Holders shall be subrogated to the rights of the holders of
such Senior Debt to receive payments or distributions of assets of the Company
made on such Senior Debt until the Notes shall be paid in full in cash; and for
the purposes of such subrogation, no payments or distributions to holders of
such Senior Debt of any cash, property or securities to which Holders of the
Notes would be entitled except for the provisions of this Article Eleven, and no
payment pursuant to the provisions of this Article Eleven to holders of such
Senior Debt by the Holders, shall, as between the Company, its creditors other
than holders of such Senior Debt and the Holders, be deemed to be a payment by
the Company to or on account of such Senior Debt, it being understood that the
provisions of this Article Eleven are solely for the purpose of defining the
relative rights of the holders of such Senior Debt, on the one hand, and the
Holders, on the other hand.
 
     If any payment or distribution to which the Holders would otherwise have
been entitled but for the provisions of this Article Eleven shall have been
applied, pursuant to the provisions of this Article Eleven, to the payment of
all amounts payable under the Senior Debt, then and in such case, the Holders
shall be
 
                                       48
<PAGE>   56
 
entitled to receive from the holders of such Senior Debt at the time outstanding
any payments or distributions received by such holders of Senior Debt in excess
of the amount sufficient to pay all amounts payable under or in respect of such
Senior Debt in full.
 
     SECTION 11.7.  Obligations of Company Unconditional.
 
     Nothing contained in this Article Eleven or elsewhere in this Indenture or
in any Note is intended to or shall impair, as between the Company and the
Holders, the obligations of the Company, which are absolute and unconditional to
pay to the Holders the principal of, premium, if any, and interest on the Notes
as and when the same shall become due and payable in accordance with their
terms, or is intended to or shall affect the relative rights of the Holders and
creditors of the Company other than the holders of the Senior Debt, nor shall
anything herein or therein prevent the Trustee or any Holder from exercising all
remedies otherwise permitted by applicable law upon Default under this
Indenture, subject to the rights, if any, under this Article Eleven of the
holders of such Senior Debt in respect of cash, property or Notes of the Company
received upon the exercise of any such remedy.
 
     The failure to make a payment on account of principal of, premium, if any,
or interest on, the Notes by reason of any provision of this Article Eleven
shall not be construed as preventing the occurrence of an Event of Default under
Section 6.1.
 
     SECTION 11.8. The Trustee Entitled to Assume Payments Not Prohibited in
                   Absence of Notice.
 
     The Trustee or Paying Agent shall not at any time be charged with the
knowledge of the existence of any facts which would prohibit the making of any
payment to or by the Trustee or Paying Agent, unless and until the Trustee or
Paying Agent shall have received written notice thereof from the Company or one
or more holders of Senior Debt or from any trustee or agent therefor, including
Senior Representatives; and, prior to the receipt of any such written notice,
the Trustee or Paying Agent shall be entitled to assume conclusively that no
such facts exist. Unless by noon Eastern time one Business Day prior to the date
on which by the terms of this Indenture any monies are to be deposited by the
Company with the Trustee or any Paying Agent (whether or not in trust) for any
purpose (including, without limitation, the payment of the principal of,
premium, if any, or the interest on, any Note), the Trustee or Paying Agent
shall have received with respect to such monies the notice provided for in the
preceding sentence, the Trustee or Paying Agent shall have full power and
authority to receive such monies and to apply the same to the purpose for which
they were received, and shall not be affected by any notice to the contrary
which may be received by it on or after such date, except for an acceleration of
the Notes prior to such application. The foregoing shall not apply to the Paying
Agent if the Company is acting as Paying Agent. Nothing contained in this
Section 11.8 shall limit the right of the holders of Senior Debt to recover
payments as contemplated by Section 11.2 hereof. The Trustee shall be entitled
to rely on the delivery to it of a written notice by a person representing
himself or itself to be a holder of such Senior Debt (or a trustee on behalf of,
or other representative of, such holder, including Senior Representatives) to
establish that such notice has been given by a holder of such Senior Debt or a
trustee on behalf of any such holder. Nothing in this Article Eleven shall apply
to amounts due the Trustee pursuant to Section 7.7 hereof.
 
     SECTION 11.9.  Right of Trustee to Hold Senior Debt.
 
     The Trustee and any agent (including Senior Representatives) for the
holders of Senior Debt shall be entitled to all of the rights set forth in this
Article Eleven in respect of any Senior Debt at any time held by it to the same
extent as any other holder of such Senior Debt, and nothing in this Indenture
shall be construed to deprive the Trustee or any agent for the holders of Senior
Debt of any of its rights as such holder.
 
     SECTION 11.10.  No Implied Covenants by or Obligations of the Trustee.
 
     With respect to the holders of Senior Debt, the Trustee undertakes to
perform or to observe only such of its covenants and obligations as are
specifically set forth in this Article Eleven, and no implied covenants or
obligations with respect to the holders of Senior Debt shall be read into this
Article Eleven against the Trustee. The Trustee shall not be deemed to have any
fiduciary duty to the holders of the Senior Debt except where the Trustee holds
payments or distributions in trust for holders of the Senior Debt as provided
herein.
 
                                       49
<PAGE>   57
 
                                   ARTICLE 12

                                 MISCELLANEOUS
 
     SECTION 12.1.  Trust Indenture Act Controls.
 
     If any provision of this Indenture limits, qualifies or conflicts with
another provision which is required to be included in this Indenture by the TIA,
the provision so required shall control.
 
     SECTION 12.2.  Notices.
 
     Any notice or communication by the Company, the Trustee or any Senior
Representative to the others is duly given if in writing and delivered in person
or mailed by first-class mail (registered or certified, return receipt
requested), telex, telecopier or overnight air courier guaranteeing next day
delivery, to the other's address:
 
<TABLE>
<S>                  <C>
If to the Company:   Metrocall, Inc. 
                     6677 Richmond Highway 
                     Alexandria, VA 22306 
                     Telephone: (703) 660-6677 
                     Facsimile: (703) 768-5407 
                     Attn: Vincent D. Kelly

With a copy to:      Wilmer, Cutler & Pickering 
                     2445 M Street, N.W. 
                     Washington, D.C. 20037
                     Telephone: (202) 663-6000
                     Facsimile: (202) 663-6363
                     Attn: Thomas W. White
 
If to the Trustee:   First Union National Bank 
                     901 East Cary Street -- VA 3279 
                     Richmond, VA 23219 
                     Attn: Corporate Trust Department
</TABLE>
 
     If to any Senior Representative, to such address as such Senior
Representative may by notice to the others designate.
 
     The Company, any other obligor upon the Notes or the Trustee or any Senior
Representative by notice to the others may designate additional or different
addresses for subsequent notices or communications.
 
     All notices and communications (other than those sent to Noteholders) shall
be deemed to have been duly given: at the time delivered by hand, if personally
delivered; five Business Days after being deposited in the mail, postage
prepaid, if mailed; when answered back, if telexed; when receipt acknowledged,
if telecopied; and the next Business Day after timely delivery to the courier,
if sent by overnight air courier guaranteeing next day delivery.
 
     Any notice or communication to a Noteholder shall be mailed by first-class
mail to his or her address shown on the register kept by the Registrar. Failure
to mail a notice or communication to a Noteholder or any defect in it shall not
affect its sufficiency with respect to other Noteholders.
 
     If a notice or communication is mailed in the manner provided above within
the time prescribed, it is duly given, whether or not the addressee receives it.
 
     If the Company (or any other obligor upon the Notes) mails a notice or
communication to Noteholders, it shall mail a copy to the Trustee and each Agent
at the same time.
 
                                       50
<PAGE>   58
 
     SECTION 12.3.  Communication by Holders with Other Holders.
 
     Noteholders may communicate pursuant to TIA Section 312(b) with other
Noteholders with respect to their rights under this Indenture or the Notes. The
Company, the Trustee, the Registrar and other applicable Persons shall have the
protection of TIA Section 312(c).
 
     SECTION 12.4.  Certificate and Opinion as to Conditions Precedent.
 
     Upon any request or application by the Company (or any other obligor upon
the Notes) to the Trustee to take any action under this Indenture, the Company
(or such other obligor) shall furnish to the Trustee:
 
          (1) an Officers' Certificate (which shall include the statements set
     forth in Section 12.5) stating that, in the opinion of the signers, all
     conditions precedent and covenants, if any, provided for in this Indenture
     relating to the proposed action have been complied with; and
 
          (2) an Opinion of Counsel (which shall include the statements set
     forth in Section 12.5) stating that, in the opinion of such counsel, all
     such conditions precedent and covenants have been complied with.
 
     SECTION 12.5.  Statements Required in Certificate or Opinion.
 
     Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:
 
          (1) a statement that the Person making such certificate or opinion has
     read such covenant or condition;
 
          (2) a brief statement as to the nature and scope of the examination or
     investigation upon which the statements contained in such certificate or
     opinion are based;
 
          (3) a statement that, in the opinion of such Person, 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 or not, in the opinion of such Person,
     such condition or covenant has been complied with.
 
     SECTION 12.6.  Rules by Trustee and Agents.
 
     The Trustee may make reasonable rules for action by or at a meeting of
Noteholders. Any Agent may make reasonable rules and set reasonable requirements
for its functions.
 
     SECTION 12.7.  Legal Holidays.
 
     If any specified date for making payment is not a Business Day, subject to
Section 4.1 hereof, the action may be taken on the next succeeding Business Day
without penalty of any kind (including the accrual of interest).
 
     SECTION 12.8.  No Recourse Against Others.
 
     A director, officer, employee or stockholder of the Company, as such, shall
not have any liability for any obligations of the Company under the Notes or
this Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation. Each Noteholder by accepting a Note waives and
releases all such liability.
 
     SECTION 12.9.  Governing Law.
 
     The laws of the State of New York shall govern and be used to construe this
Indenture and the Notes.
 
                                       51
<PAGE>   59
 
     SECTION 12.10.  No Adverse Interpretation of Other Agreements.
 
     This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company or a Subsidiary. Any such indenture, loan or debt
agreement may not be used to interpret this Indenture.
 
     SECTION 12.11.  Successors.
 
     All agreements of the Company in this Indenture and in the Notes shall bind
its successor. All agreements of the Trustee in this Indenture shall bind its
successor.
 
     SECTION 12.12.  Severability.
 
     In case any provision in this Indenture or in the Notes shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.
 
     SECTION 12.13.  Counterpart Originals.
 
     The parties may sign any number of copies of this Indenture. Each signed
copy shall be an original, but all of them together represent the same
agreement. One signed copy is enough to prove this Indenture.
 
     SECTION 12.14.  Variable Provisions.
 
     The Company initially appoints the Trustee as Paying Agent and Registrar.
 
     SECTION 12.15.  Qualification of Indenture.
 
     The Company shall qualify this Indenture under the TIA and shall pay all
reasonable costs and expenses (including attorneys' fees for the Company and the
Trustee) incurred in connection therewith, including, but not limited to, costs
and expenses of qualification of the Indenture and the Notes and printing this
Indenture and the Notes. The Trustee shall be entitled to receive from the
Company any such Officers' Certificates, Opinions of Counsel or other
documentation as it may reasonably request in connection with any such
qualification of this Indenture under the TIA and the registration and exchange
of the Notes.
 
     SECTION 12.16.  Table of Contents, Headings, Etc.
 
     The Table of Contents, Cross-Reference Table and Headings of the Articles
and Sections of this Indenture have been inserted for convenience of reference
only and are not intended to describe, interpret, define, limit or modify any of
the terms or provisions of this Indenture.
 
     SECTION 12.17.  Indenture Controls over Form of Note.
 
     If any provision of a Note conflicts with the terms of this Indenture, the
terms of this Indenture shall control.
 
     IN WITNESS WHEREOF, the Company and the Trustee have caused this Indenture
to be duly executed and delivered as of the date first written above:
 
                                       52
<PAGE>   60
 
                                   SIGNATURES
 
                                          METROCALL, INC.,
 
                                          By: 
                                          --------------------------------------
                                          Name: William L. Collins, III
                                          Title:  President and Chief Executive
                                                  Officer
 
                                          FIRST UNION NATIONAL BANK, Trustee,
 
                                          By: /s/ DANTE M. MONAKIL
                                          --------------------------------------
                                          Name: Dante M. Monakil
                                          Title:  Vice President
 
                                       53
<PAGE>   61
 
                                                                       EXHIBIT A
 
                                  FORM OF NOTE
                                  [FRONT SIDE]
                        9 3/4% SENIOR SUBORDINATED NOTES
                             [CUSIP NO.] [CINS NO.]
                              DUE NOVEMBER 1, 2007
                                  $200,000,000
 
     METROCALL, INC., a Delaware corporation (the "Company," which term includes
any successor corporation under the indenture hereinafter referred to), for
value received promises to pay to                or registered assigns, the
principal sum of $                    on November 1, 2007. Interest Payment
Dates: January 15 and July 15, commencing January 15, 1998. Record Dates:
January 1 and July 1.
 
     Reference is made to the further provisions of this Note contained herein,
which will for all purposes have the same effect as if set forth at this place.
 
     IN WITNESS WHEREOF, the Company has caused this Note to be signed manually
or by facsimile by its duly authorized officers and a facsimile of its corporate
seal to be affixed hereto or imprinted herein.
 
Dated:
 
METROCALL, INC. [Corporate Seal]
 
                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:
 
Attest:
       -------------------------------------------------

                         CERTIFICATE OF AUTHENTICATION
 
     This is one of the 9 3/4% Senior Subordinated Notes due 2007 referred to in
the within-mentioned Indenture.
 
FIRST UNION NATIONAL BANK, as Trustee
 
                                       By:
                                          --------------------------------------
                                                    Authorized Signature
 
                                       A-1
<PAGE>   62
 
                                 [REVERSE SIDE]
 
                        9 3/4% SENIOR SUBORDINATED NOTES
                                    DUE 2007
 
     1. Principal and Interest.  The Company will pay the principal of this Note
on November 1, 2007. The Company promises to pay interest on the principal
amount of this Note at the rate per annum shown above. The Company will pay
interest semi-annually on January 15 and July 15 of each year. Interest on the
Notes will accrue from the most recent date to which interest has been paid or,
if no interest has been paid, from October 21, 1997, PROVIDED that the first
interest payment date shall be January 15, 1998. Interest on the Notes will
continue to accrue at the rate of 9 3/4% per annum in the event of overdue
principal, premium or interest, if any. Interest will be computed on the basis
of a 360-day year of twelve 30-day months.
 
     If an exchange offer registered under the Securities Act of 1933, as
amended (the "Securities Act") is not consummated and a shelf registration
statement under the Securities Act with respect to resales of the Notes is not
declared effective by the Commission, on or before April 21, 1998 in accordance
with the terms of the Registration Rights Agreement dated as of October 21, 1997
among the Company and Morgan Stanley & Co. Incorporated, TD Securities (USA)
Inc., First Union Capital Markets Corp. and NationsBanc Montgomery Securities,
Inc., the annual interest rate borne by the Notes shall be increased by .5% from
the rate shown above accruing from April 21, 1998, payable in cash semiannually,
in arrears, on each January 15, and July 15, commencing July 15, 1998, until the
exchange offer is completed or the shelf registration statement is declared
effective. The Holder of this Note is entitled to the benefits of such
Registration Rights Agreement.
 
     2. Method of Payment.  Upon Stated Maturity, the Company shall irrevocably
deposit with the Trustee or the Paying Agent money in immediately available
funds sufficient to pay such principal, premium, if any, and/or interest. The
Paying Agent will pay from such monies interest on the Notes (except defaulted
interest) to the Persons who are registered Holders of Notes at the close of
business on the record date next preceding the interest payment date, even if
such Notes are cancelled, redeemed or repurchased after such record date and on
or before such interest payment date. Subject to the foregoing, each Note
delivered under the Indenture upon registration of, transfer of or in exchange
for or in lieu of any other Note shall carry the rights to interest accrued and
unpaid, and to accrue, which were carried by such other Note. The Holder must
surrender this Note to a Paying Agent to collect principal payments. The Company
will pay principal, premium, if any, and interest in money of the United States
that at the time of payment is legal tender for payment of public and private
debts. The Company, at its option, may pay principal, premium, if any, and
interest by check payable in such money mailed to a Holder's registered address
or at the office or agency of the Company maintained for such purpose in The
City of New York or, if the Notes are listed on the Luxembourg Exchange, in
Luxembourg.
 
     3. Paying Agent and Registrar.  Initially, First Union National Bank, as
Trustee ("Trustee," which term shall include any successor trustee under the
Indenture hereinafter referred to), will act as Paying Agent and Registrar. The
Company may change any Paying Agent, Registrar or co-registrar without notice to
any Noteholder.
 
     4. Indenture.  The Company issued the Notes under an Indenture dated as of
October 21, 1997 (as it may be amended from time to time in accordance with the
terms thereof, the "Indenture") between the Company and the Trustee. The terms
of the Notes include those stated in the Indenture and those made part of the
Indenture by reference to the Trust Indenture Act of 1939 (Title 15, United
States Code, Sections 77aaa-77bbbb). The Notes are subject to all such terms,
and Noteholders are referred to the Indenture and such Act for a statement of
such terms. The Notes are unsecured general obligations of the Company limited
to $200.0 million in aggregate principal amount. The Company may, subject to
Article Four of the Indenture, issue additional Notes under the Indenture.
 
     5. Optional Redemption.  (a) The Company may redeem all or any of the Notes
at any time on or after November 1, 2002, upon not less than 30 days nor more
than 60 days' prior notice in amounts of $1,000 or an
 
                                       A-2
<PAGE>   63
 
integral multiple thereof at the Redemption Prices (expressed as a percentage of
the principal amount) set forth below, if redeemed during the 12-month period
beginning November 1 of the years indicated below:
 
<TABLE>
<CAPTION>
                                      YEAR                             PERCENTAGE
            --------------------------------------------------------   ----------
            <S>                                                        <C>
            2002....................................................     104.875%
            2003....................................................    102.4375%
            2004 and thereafter.....................................      100.00%
</TABLE>
 
in each case together with accrued and unpaid interest to the Redemption Date.
 
     6. Mandatory Redemption.  There is no sinking fund with respect to the
Notes. If the Company consummates any Asset Disposition (as such term is defined
in the Indenture), the Company may under certain circumstances be required to
utilize a certain portion of the proceeds received from such Asset Disposition
to offer to repurchase Notes at a price equal to 100% of the principal amount
plus accrued and unpaid interest, as provided in the Indenture.
 
     7. Notice of Redemption.  Notice of redemption will be mailed at least 30
days but not more than 60 days before the Redemption Date to each Holder of
Notes to be redeemed at its registered address. Notes in denominations larger
than $1,000 may be redeemed in part but only in whole multiples of $1,000,
unless all of the Notes held by a Holder are to be redeemed. On and after the
Redemption Date, interest ceases to accrue on Notes or portions of them called
for redemption.
 
     8. Redemption of Notes at the Option of the Holder.  Subject to the terms
and conditions of the Indenture, if any Change of Control (as defined in the
Indenture) occurs on or prior to maturity, the Company will be required, subject
to its prior compliance with certain covenants in respect of Senior Debt, to
offer to purchase each Holder's Notes as provided in the Indenture for a
purchase price equal to 101% of the principal amount thereof plus accrued and
unpaid interest to the purchase date.
 
     9. Subordination.  The Notes are subordinated to Senior Debt (as defined in
the Indenture) which includes (with certain exceptions) the principal of, and
premium, if any, and interest (including interest accruing on or after the
filing of any petition in bankruptcy or for reorganization relating to the
Company whether or not such claim for post-petition interest is allowed in such
proceeding) on, any Debt of the Company, whether outstanding on the date of the
Indenture or thereafter created, incurred or assumed, unless, in the case of any
particular Debt, the instrument creating or evidencing, or the agreement
governing, such Debt or pursuant to which such Debt is outstanding expressly
provides that such Debt shall not be senior in right of payment to the Notes. To
the extent provided in the Indenture, Debt must be paid before the Notes may be
paid. The Company agrees, and each Noteholder by accepting a Note agrees, to the
subordination and authorizes the Trustee to give it effect.
 
     10. Denominations, Transfer, Exchange.  The Notes are in registered form
without coupons in denominations of $1,000 and in integral multiples of $1,000.
The transfer of Notes may be registered and Notes may be exchanged as provided
in the Indenture. The Registrar and the Trustee may require a Holder, among
other things, to furnish appropriate endorsements, certificates, opinions and
transfer documents and to pay any taxes and fees required by law or permitted by
the Indenture. The Registrar need not exchange or register the transfer of any
Note or portion of a Note selected for redemption. Also, it need not exchange or
register the transfer of any Notes for a period of 15 days before a selection of
Notes to be redeemed or during the period between a record date and the next
succeeding interest payment date.
 
     11. Persons Deemed Owners.  The registered Holder of a Note may be treated
as its owner for all purposes.
 
     12. Amendments and Waivers.  Subject to certain exceptions, the Indenture
or the Notes may be amended or supplemented, or compliance by the Company with
any provision of the Indenture or the Notes may be waived, with the consent of
the Holders of a majority in aggregate principal amount of the Notes then
outstanding; provided, however, that without the consent of each Holder affected
thereby, the Company may not (1) reduce the percentage of aggregate principal
amount of Notes whose Holders must consent to an
 
                                       A-3
<PAGE>   64
 
amendment, supplement or waiver; (2) reduce the percentage of aggregate
principal amount of outstanding Notes whose Holders must consent to a
modification or amendment of the Indenture or for waiver of Events of Default or
Defaults as defined in the Indenture; (3) reduce the principal amount of (or the
premium of, if any) or interest on any Note or change the maturity date of the
principal of, or any installment of interest on, the Notes; (4) reduce the
Redemption Price, including premium, if any, payable upon redemption or
repurchase of any Note or change the time at which any Note may or shall be
redeemed or repurchased; (5) reduce the rate or change the time, place or
currency of payment of principal of, premium, if any, or interest (including
defaulted interest) on, any Note; (6) impair the right to institute suit for the
enforcement of any payment of principal of, premium, if any, or interest on, any
Note; (7) waive a continuing past Default or Event of Default in the payment of
principal of, premium, if any, or interest on, the Notes; (8) modify any of the
provisions of the Indenture relating to the subordination of the Notes in a
manner adverse to the Holders of the Notes; (9) modify any of the provisions of
the Indenture relating to the modification and amendment of the Indenture or the
waiver of past defaults or covenants; or (10) following the mailing of an offer
with respect to a Change of Control Offer as described under Section 4.17 of the
Indenture or an offer to purchase as described under Section 4.15 of the
Indenture, modify the Indenture with respect to such Change of Control Offer or
offer to purchase in a manner adverse to such Holders.
 
     Notwithstanding the foregoing, without the consent of any Holder of Notes
and subject to certain requirements set forth in Section 9.1 of the Indenture,
the Company and the Trustee may amend or supplement the Indenture or the Notes
to cure an ambiguity, defect or inconsistency, to comply with Section 5.1 of the
Indenture, to make any change that does not adversely affect the legal rights
under the Indenture of any such Holder, to evidence or to provide for a
replacement Trustee, to comply with requirements of the Commission in order to
effect or maintain the qualification of the Indenture under the Trust Indenture
Act, or to add to the covenants and agreements of the Company for the benefit of
the Holders and to surrender any right or power reserved in the Indenture to the
Company.
 
     13. Defaults and Remedies.  An Event of Default shall occur if: (1) the
Company fails to pay interest on any Notes when the same becomes due and payable
and such failure continues for a period of 30 days (including the failure to
make payments pursuant to a Change of Control Offer pursuant to Section 4.17 of
the Indenture or an offer to repurchase pursuant to Section 4.15 of the
Indenture); (2) the Company fails to pay the principal of or premium, if any, on
any Notes when the same becomes due and payable at maturity, upon acceleration,
redemption or otherwise (including the failure to make payments pursuant to a
Change of Control Offer pursuant to Section 4.17 of the Indenture or an offer to
repurchase pursuant to Section 4.15 of the Indenture); (3) the Company or any
Subsidiary of the Company fails to perform any other term, covenant, condition,
provision or agreement (other than the provisions of Article Five of the
Indenture) contained in the Notes or the Indenture and such failure continues
for a period of 60 days after the notice specified in the Indenture; (4) the
Company or any Subsidiary of the Company fails to perform or comply with the
provisions of Article Five of the Indenture; (5) the Company or any of its
Subsidiaries (A) admits in writing its inability to pay its debts generally as
they become due, (B) commences a voluntary case or proceeding under any
Bankruptcy Law with respect to itself, (C) consents to the entry of a judgment,
decree or order for relief against it in an involuntary case or proceeding under
any Bankruptcy Law, (D) consents to the appointment of a custodian of it or for
substantially all of its property, (E) consents to or acquiesces in the
institution of a bankruptcy or an insolvency proceeding against it, (F) makes a
general assignment for the benefit of its creditors, or (G) takes any corporate
action to authorize or effect any of the foregoing; (6) a court of competent
jurisdiction enters a judgment, decree or order for relief in respect of the
Company or any of its Subsidiaries in an involuntary case or proceeding under
any Bankruptcy Law, which shall (A) approve as properly filed a petition seeking
reorganization, arrangement, adjustment or composition in respect of the Company
or any of its Subsidiaries, (B) appoint a custodian of the Company or any of its
Subsidiaries or for substantially all of its property or (C) order the
winding-up or liquidation of its affairs; and such judgment, decree or order
shall remain unstayed and in effect for a period of 60 consecutive days; (7)
final judgment or judgments for the payment of money which in the aggregate at
any one time exceeds $5.0 million shall be rendered against the Company or any
Subsidiary of the Company by a court of competent jurisdiction and shall not
have been vacated, discharged, satisfied or stayed within 60 days after such
judgment becomes final and nonappealable; or (8) a default shall have occurred
under any bonds, debentures, notes or other evidences
 
                                       A-4
<PAGE>   65
 
of indebtedness of the Company or any Subsidiary of the Company or under any
mortgages, indentures or instruments under which there may be issued or by which
there may be secured or evidenced any indebtedness by the Company or any
Subsidiary of the Company, in any case with a principal amount of at least $5.0
million outstanding, and such indebtedness already is due and payable in full or
such default has resulted in the acceleration of the maturity of such
indebtedness. If an Event of Default shall occur and be continuing, the Trustee
or the Holders of at least 25% in aggregate principal amount of the then
outstanding Notes may declare all the Notes to be due and payable as provided in
the Indenture, except that in the case of an Event of Default arising from
certain events of bankruptcy or insolvency, all outstanding Notes become due and
payable immediately without further action or notice. The Trustee may require
reasonable indemnity before it enforces the Indenture or the Notes. Subject to
certain limitations, Holders of a majority in principal amount of the then
outstanding Notes may direct the Trustee in its exercise of any trust or power.
The Company must furnish an annual compliance certificate to the Trustee. The
Company must also furnish a notice of any Default (as provided in the Indenture)
to the Trustee within five business days after such occurrence.
 
     14. Trustee Dealings with Company.  Subject to certain limitations, the
Trustee under the Indenture, in its individual or any other capacity, may make
loans to, accept deposits from, and perform services for the Company or its
Affiliates, and may otherwise deal with the Company or its Affiliates, as if it
were not Trustee.
 
     15. No Recourse Against Others.  A director, officer, employee or
stockholder, as such, of the Company shall not have any liability for any
obligations of the Company under the Notes or the Indenture or for any claim
based on, in respect of or by reason of, such obligations or their creation.
Each Noteholder by accepting a Note waives and releases all such liability. The
waiver and release are part of the consideration for the issuance of the Notes.
 
     16. Authentication.  This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.
 
     17. Abbreviations.  Customary abbreviations may be used in the name of a
Noteholder or an assignee, such as: TEN COM (= tenants in common), TENANT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).
 
     18. Unclaimed Money.  If money for the payment of principal or interest
remains unclaimed for two years, the Trustee or Paying Agent will pay the money
over to the Company, unless otherwise required by law. After that, Holders
entitled to money must look to the Company for payment, unless otherwise
required by law.
 
     19. Discharge Prior to Maturity.  If the Company irrevocably deposits with
the Trustee or Paying Agent in trust cash or U.S. Government Obligations
sufficient to pay the principal of and interest on the Notes to maturity and
satisfies certain conditions specified in the Indenture, the Company will be
discharged from the Indenture except for certain Sections thereof.
 
     20. Successor.  When a successor to the Company assumes all the obligations
of its predecessor under the Notes and the Indenture, such predecessor shall be
released from those obligations.
 
     21. Governing Law.  This Note shall be governed by and construed in
accordance with the laws of the State of New York.
 
     The Company will furnish to any Noteholder upon written request and without
charge a copy of the Indenture. Request may be made to:
 
Metrocall, Inc.  Attention: Vincent D. Kelly
                 6677 Richmond Highway
                 Alexandria, VA 22306
 
                                       A-5
<PAGE>   66
 
                                ASSIGNMENT FORM
 
     To assign this Note, fill in the form below: (I) or (we) assign and
transfer this Note to
 
- --------------------------------------------------------------------------------
                 (Insert assignee's soc. sec. or tax I.D. no.)
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
             (Print or type assignee's name, address and zip code)
 
and irrevocably appoint                agent to transfer this Note on the books
of the Company. The agent may substitute another to act for him or her.
 
                    [THE FOLLOWING PROVISION TO BE INCLUDED
                    ON ALL NOTES OTHER THAN EXCHANGE NOTES,
                      UNLEGENDED OFFSHORE GLOBAL NOTES AND
                      UNLEGENDED OFFSHORE PHYSICAL NOTES]
 
     In connection with any transfer of this Note occurring prior to the date
which is the earlier of (i) the date the shelf registration statement is
declared effective or (ii) the end of the period referred to in Rule 144(k)
under the Securities Act, the undersigned confirms that without utilizing any
general solicitation or general advertising that:
 
                                   [Check One]
 
        [  ] (a) this Note is being transferred in compliance with the exemption
                 from registration under the Securities Act of 1933 provided by
                 Rule 144A thereunder.
 
                                       or
 
        [  ] (b) this Note is being transferred other than in accordance with
                 (a) above and documents are being furnished which comply with
                 the conditions of transfer set forth in this Note and the
                 Indenture.
 
If none of the foregoing boxes is checked, the Trustee or other Registrar shall
not be obligated to register this Note in the name of any Person other than the
Holder hereof unless and until the conditions to any such transfer of
registration set forth herein and in Section 2.9 of the Indenture shall have
been satisfied.
 
<TABLE>
<S>                         <C>
Date:                       Your Signature:
     --------------------                  --------------------------------------------------
                            NOTICE: The signature to this assignment must correspond with the
                            name as written upon the face of the within-mentioned instrument
                            in every particular, without alteration or any change whatsoever.
 
                            Signature Guarantee:
                                                ---------------------------------------------
                            (Participant in recognized signature guarantee medallion program)
</TABLE>
 
                                       A-6
<PAGE>   67
 
TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.
 
     The undersigned represents and warrants that it is purchasing this Note for
its own account or an account with respect to which it exercises sole investment
discretion and that it and any such account is a "qualified institutional buyer"
within the meaning of Rule 144A under the Securities Act of 1933 and is aware
that the sale to it is being made in reliance on Rule 144A and acknowledges that
it has received such information regarding the Company as the undersigned has
requested pursuant to Rule 144A or has determined not to request such
information and that it is aware that the transferor is relying upon the
undersigned's foregoing representations in order to claim the exemption from
registration provided by Rule 144A.
 
<TABLE>
<S>                         <C>
Date:                       Your Signature:
     --------------------                  --------------------------------------------------
                            NOTICE: To be executed by an executive officer
 
                            Signature Guarantee:
                                                ---------------------------------------------
                            (Participant in recognized signature guarantee medallion program)
</TABLE>
 
OPTION OF HOLDER TO ELECT PURCHASE
 
     If you wish to elect to have all or any portion of this Note purchased by
the Company pursuant to Section 4.17 ("Change of Control Offer") of the
Indenture, check the applicable boxes:
 
     [ ] Change of Control Offer: in whole [ ] in part [ ] Amount to be
purchased: $
            ----------------
  
<TABLE>
<S>                         <C>
Date:                       Your Signature:
     --------------------                  --------------------------------------------------
                            (Sign exactly as your name appears on the other side of this
                            Note)
 
                            Signature Guarantee:
                                                ---------------------------------------------
                            (Participant in recognized signature guarantee medallion program)
</TABLE>
 
Social Security Number or Taxpayer Identification Number:
                                                         -----------------------
 
                                       A-7
<PAGE>   68
 
                                                                       EXHIBIT B
 
                              FORM OF CERTIFICATE
 
                                                                         ,
 
First Union National Bank
901 East Cary Street -- VA 3279
Richmond, VA 23219
Attention: Corporate Trust Department
 
                      Re: Metrocall, Inc. (the "Company")
            9 3/4% Senior Subordinated Notes due 2007 (the "Notes")
 
Dear Ladies and Gentlemen:
 
     This letter relates to U.S. $          principal amount of Notes
represented by a Note (the "Legended Note") which bears a legend outlining
restrictions upon transfer of such Legended Note. Pursuant to Section 2.2 of the
Indenture dated as of October 21, 1997 (the "Indenture") relating to the Notes,
we hereby certify that we are (or we will hold such securities on behalf of) a
person outside the United States to whom the Notes could be transferred in
accordance with Rule 904 of Regulation S promulgated under the U.S. Securities
Act of 1933. Accordingly, you are hereby requested to exchange the legended
certificate for an unlegended certificate representing an identical principal
amount of Notes, all in the manner provided for in the Indenture.
 
     You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby. Terms used in this certificate have the
meanings set forth in Regulation S.
 
                                          Very truly yours,
 
                                          [Name of Holder]
 
                                          By:
                                             -----------------------------------
                                             Authorized Signature
 
                                       B-1
<PAGE>   69
 
                                                                       EXHIBIT C
 
               FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION
                 WITH TRANSFERS TO NON-QIB ACCREDITED INVESTORS
 
                                                                         ,
 
First Union National Bank
901 East Cary Street -- VA 3279
Richmond, VA 23219
Attention: Corporate Trust Department
 
                      Re: Metrocall, Inc. (the "Company")
            9 3/4% Senior Subordinated Notes due 2007 (the "Notes")
 
Dear Ladies and Gentlemen:
 
     In connection with our proposed purchase of $          aggregate principal
amount of the Notes, we confirm that:
 
          1. We understand that any subsequent transfer of the Notes is subject
     to certain restrictions and conditions set forth in the Indenture dated as
     of October 21, 1997 (the "Indenture"), relating to the Notes, and the
     undersigned agrees to be bound by, and not to resell, pledge or otherwise
     transfer the Notes except in compliance with, such restrictions and
     conditions and the Securities Act of 1933 (the "Securities Act").
 
          2. We understand that the offer and sale of the Notes have not been
     registered under the Securities Act, and that the Notes may not be offered
     or sold except as permitted in the following sentence. We agree, on our own
     behalf and on behalf of any accounts for which we are acting as hereinafter
     stated, that if we should sell any Notes, we will do so only (A) to the
     Company or any subsidiary thereof, (B) in accordance with Rule 144A under
     the Securities Act to a "qualified institutional buyer" (as defined
     therein), (C) to an institutional "accredited investor" (as defined below)
     that, prior to such transfer, furnishes (or has furnished on its behalf by
     a U.S. broker-dealer) to you and to the Company a signed letter
     substantially in the form of this letter, (D) outside the United States in
     accordance with Rule 904 of Regulation S under the Securities Act, (E)
     pursuant to the exemption from registration provided by Rule 144 under the
     Securities Act, or (F) pursuant to an effective registration statement
     under the Securities Act, and we further agree to provide to any person
     purchasing any of the Notes from us a notice advising such purchaser that
     resales of the Notes are restricted as stated herein.
 
          3. We understand that, on any proposed resale of any Notes, we will be
     required to furnish to you and the Company such certifications, legal
     opinions and other information as you and the Company may reasonably
     require to confirm that the proposed sale complies with the foregoing
     restrictions. We further understand that the Notes purchased by us will
     bear a legend to the foregoing effect.
 
          4. We are an institutional "accredited investor" (as defined in Rule
     501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and
     have such knowledge and experience in financial and business matters as to
     be capable of evaluating the merits and risks of our investment in the
     Notes, and we and any accounts for which we are acting are each able to
     bear the economic risk of our or its investment.
 
          5. We are acquiring the Notes purchased by us for our own account or
     for one or more accounts (each of which is an institutional "accredited
     investor") as to each of which we exercise sole investment discretion.
 
                                       C-1
<PAGE>   70
 
     You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.
 
                                          Very truly yours,
 
                                          [Name of Transferee]
 
                                          By:
                                             -----------------------------------
                                             Authorized Signature
 
                                       C-2
<PAGE>   71
 
                                                                       EXHIBIT D
 
               FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION
                    WITH TRANSFERS PURSUANT TO REGULATION S
 
                                                                         ,
 
First Union National Bank
901 East Cary Street -- VA 3279
Richmond, VA 23219
Attention: Corporate Trust Department
 
                      Re: Metrocall, Inc. (the "Company")
            9 3/4% Senior Subordinated Notes due 2007 (the "Notes")
 
Dear Ladies and Gentlemen:
 
     In connection with our proposed sale of U.S.$          aggregate principal
amount of the Notes, we confirm that such sale has been effected pursuant to and
in accordance with Regulation S under the U.S. Securities Act of 1933 and,
accordingly, we represent that:
 
          (1) the offer of the Notes was not made to a person in the United
     States;
 
          (2) at the time the buy order was originated, the transferee was
     outside the United States or we and any person acting on our behalf
     reasonably believed that the transferee was outside the United States;
 
          (3) no directed selling efforts have been made by us in the United
     States in contravention of the requirements of Rule 903(b) or Rule 904(b)
     of Regulation S, as applicable; and
 
          (4) the transaction is not part of a plan or scheme to evade the
     registration requirements of the U.S. Securities Act of 1933.
 
     You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby. Terms used in this certificate have the
meanings set forth in Regulation S.
 
                                          Very truly yours,
 
                                          [Name of Transferor]
 
                                          By:
                                             -----------------------------------
                                             Authorized Signature
 
                                       D-1

<PAGE>   1
                                                                    EXHIBIT 99.1


                            [METROCALL LETTERHEAD]



OCTOBER 17, 1997

FOR IMMEDIATE RELEASE             Contact:  Paul Liberty, VP, Investor Relations
                                                       (703) 660-6677, ext. 6260
                                                 E-mail:  [email protected]
                                            
                                 
               METROCALL SELLS $200 MILLION IN SUBORDINATED DEBT


         ALEXANDRIA, VIRGINIA, October 17, 1997 - Metrocall, Inc. (NASDAQ: MCLL)
announced today that it has agreed to sell $200 million aggregate principal
amount of Senior Subordinated Notes due 2007 in a private placement.  The Notes
will bear interest, payable semi-annually, at a rate of 9.75% and will mature on
November 1, 2007.  The Notes will be callable beginning November 1, 2002.  The
Notes will be unsecured obligations of Metrocall, subordinated to all present
and future senior indebtedness of Metrocall.  The sale of the Notes is expected
to be completed on October 21, 1997.

         Metrocall will use the net proceeds of the offering to repay
outstanding indebtedness under its senior secured bank credit facility.

         The Notes have not been registered under the Securities Act of 1933, as
amended, or any state securities laws and may not be offered or sold in the
United State or any state thereof absent registration or an applicable exemption
from registration requirements.  The Notes were offered in the United States
only to qualified institutional buyers under Rule 144A and certain institutional
accredited investors and outside the United States to certain persons in
reliance upon Regulation S under the Securities Act.

         Metrocall, Inc. is headquartered in Alexandria, Virginia and will serve
approximately 4 million subscribers upon the completion of the merger with
ProNet Inc., creating the second largest paging carrier in the United States. 
Metrocall provides wireless products and services on a local, regional, and
nationwide basis.  Metrocall's website is at http://www.metrocall.com.


                                     # # #


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission