DSC COMMUNICATIONS CORP
8-K, 1997-08-26
TELEPHONE & TELEGRAPH APPARATUS
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<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): August 12, 1997



                         DSC COMMUNICATIONS CORPORATION
             (Exact name of registrant as specified in its charter)


                               
        DELAWARE                      0-10018                     54-1025763
(State or other jurisdiction        (Commission                 (IRS Employer
     of incorporation)              File Number)             Identification No.)


        1000 COIT ROAD
         DALLAS, TEXAS                                 75075
(Address of principal executive offices)             (ZIP Code)


       Registrant's telephone number, including area code: (972) 519-3000





<PAGE>   2

ITEM 5.   OTHER EVENTS.

    On August 7, 1997, DSC Communications Corporation (the "Company") issued a
press release (filed as Exhibit 99.1 to this report and incorporated herein by
reference) announcing that it would sell $300.0 million in 7.0% convertible
subordinated notes due August 1, 2004 (the "Notes") in an offering exempt from
the registration requirements of the Securities Act of 1933, as amended (the
"Securities Act").  The transaction closed on August 12, 1997.  In connection
with the sale of the Notes, the Company granted the Initial Purchasers (defined
below) a 30-day option to purchase up to an additional $100.0 million of Notes
solely to cover over-allotments, if any.  On August 22, 1997, the Initial
Purchasers exercised the over-allotment option in full and purchased the
additional $100.0 million of Notes.  The filing of this report and the press
release shall not constitute an offer to sell or a solicitation of an offer to
buy any of the securities described herein.

ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.

    (C)   EXHIBITS.

<TABLE>
<CAPTION>
    Exhibit No.    Description.
    -----------    ----------- 
    <S>            <C>
    1.1            Purchase Agreement, dated August 7, 1997, by and among DSC
                   Communications Corporation, Goldman, Sachs & Co. and
                   NationsBanc Capital Markets, Inc.

    4.1            Indenture, dated August 12, 1997, between DSC Communications
                   Corporation and The Bank of New York, as Trustee.

    4.2            Registration Rights Agreement, dated August 12, 1997, by and
                   among DSC Communications Corporation, Goldman, Sachs & Co.
                   and NationsBanc Capital Markets, Inc.

    99.1           Press Release, dated August 7, 1997, issued by DSC
                   Communications Corporation.
</TABLE>

ITEM 9.            SALES OF EQUITY SECURITIES PURSUANT TO REGULATION S

          On August 7, 1997, the Company issued a press release announcing that
it would sell $300.0 million of Notes in an offering exempt from registration
requirements of the Securities Act.  The transaction closed on August 12, 1997.
In connection with the sale of the Notes, the Company granted the Initial
Purchasers a 30-day option to purchase up to an additional $100.0 million of
Notes solely to cover over-allotments, if any.  On August 22, 1997, the Initial
Purchasers exercised the over-allotment option in full and purchased the
additional $100.0 million of Notes.

          (a)      On August 12, 1997, the Company sold $300.0 million of
                   Notes.  On August 22, 1997, the Company sold $100.0 million
                   of Notes.

          (b)      The initial purchasers of the Notes were Goldman, Sachs &
                   Co. and NationsBanc Capital Markets, Inc.  (the "Initial
                   Purchasers").

          (c)      The total offering price of the Notes was $400.0 million
                   with a discount to the Initial Purchasers of 2.5%.

          (d)      The Company relied upon the exemption set forth in Section
                   4(2) of the Securities Act, for the sale of Notes to the
                   Initial Purchasers.  A principal amount of approximately
                   $366.0 million of Notes was placed by the Initial Purchasers
                   to qualified institutional buyers in reliance on Rule 144A
                   under the Securities Act, and approximately $34.0 million
                   principal amount of Notes was placed





                                      2
<PAGE>   3

                   by Goldman, Sachs & Co. through Goldman Sachs International,
                   as their selling agent, to non-U.S. persons outside the
                   United States in reliance on Regulation S under the
                   Securities Act.

          (e)      The Notes are convertible at the option of the holder into
                   shares of common stock, par value $0.01 per share, of the
                   Company at a conversion rate of 20.1106 shares for each
                   $1,000 principal amount of Notes, or a conversion price of
                   $49.725 per share.  The Notes are redeemable at the option
                   of the Company on or after August 1, 2000, and the
                   redemption price (expressed as a percentage of principal
                   amount) is as follows for the 12-month periods beginning on
                   August 1 of the following years:

<TABLE>
<CAPTION>
                                                                 Redemption
                   Year                                             Price   
                   ----                                         -------------
                   <S>                                              <C>
                   2000 . . . . . . . . . . . . . . . . . . . .     104%
                   2001 . . . . . . . . . . . . . . . . . . . .     103
                   2002 . . . . . . . . . . . . . . . . . . . .     102
                   2003 . . . . . . . . . . . . . . . . . . . .     101

</TABLE>

                   and thereafter is equal to 100% of the principal amount, in
                   each case together with accrued interest to the date of
                   redemption.





                                      3
<PAGE>   4

                                   SIGNATURES

    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.

                                            DSC COMMUNICATIONS CORPORATION


Date:   August 25, 1997                     By:       /S/ GEORGE B.BRUNT 
                                                  -----------------------------
                                                     George B. Brunt
                                                     Vice President, Secretary
                                                     and General Counsel





                                      4
<PAGE>   5

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
    Exhibit No.    Description.
    -----------    ----------- 
    <S>            <C>
    1.1            Purchase Agreement, dated August 7, 1997, by and among DSC Communications Corporation, Goldman, Sachs
                   & Co. and NationsBanc Capital Markets, Inc.

    4.1            Indenture, dated August 12, 1997, between DSC Communications Corporation and The Bank of New York, as
                   Trustee.

    4.2            Registration Rights Agreement, dated August 12, 1997, by and among DSC Communications Corporation,
                   Goldman, Sachs & Co. and NationsBanc Capital Markets, Inc.

    99.1           Press Release, dated August 7, 1997, issued by DSC Communications Corporation.
</TABLE>





                                      5

<PAGE>   1
                                                                  Execution Copy

                                                                     EXHIBIT 1.1

                         DSC COMMUNICATIONS CORPORATION
              7% CONVERTIBLE SUBORDINATED NOTES DUE AUGUST 1, 2004


                               PURCHASE AGREEMENT

                                                                  August 7, 1997


Goldman, Sachs & Co.,
85 Broad Street,
New York, New York 10004.

NationsBanc Capital Markets, Inc.
901 Main Street
66th Floor
Dallas, Texas 75202

Ladies and Gentlemen:

         DSC Communications Corporation, a Delaware corporation (the
"Company"), proposes, subject to the terms and conditions stated herein, to
issue and sell to the Purchasers named in Schedule I hereto (the "Purchasers")
an aggregate of U.S.$300,000,000 principal amount of the 7% Convertible
Subordinated Notes due August 1, 2004, specified above, convertible into shares
of Common Stock, par value U.S.$.01 per share (the "Stock"), of the Company,
together with the related Preferred Stock Purchase Rights of the Company
issuable with such shares of Stock (the "Firm Securities"), and, at the
election of the Purchasers, up to an aggregate of U.S.$100,000,000 additional
aggregate principal amount of such Notes (the "Optional Securities"). The Firm
Securities and the Optional Securities which the Purchasers elect to purchase
pursuant to Section 2 hereof are herein collectively called the "Securities".
As used herein, the term "Securities" shall be deemed, unless the context
otherwise requires, to include the Securities issued and sold in reliance on
Regulation S under the United States Securities Act of 1933, as amended (the
"Act"), and the term "Purchasers" shall be deemed to include Goldman Sachs
International ("GSI"), which is acting as Goldman, Sachs & Co.'s selling agent
in making certain resales of the Securities pursuant to Section 3.

         The Purchasers and other holders (including subsequent transferees) of
Securities in registered form without coupons will be entitled to the benefits
of the registration rights agreement, to be dated as of the First Time of
Delivery (as defined below) (the "Registration Rights Agreement"), among the
Company and the Purchasers, in the form attached hereto as Exhibit A.

         1.  The Company represents and warrants to, and agrees with, each of
             the Purchasers that:

                 (1)      An offering circular dated August 7, 1997 (the
                          "Offering Circular," including the international
                          supplement thereto (the "International Supplement"))
                          in respect of the Securities has been prepared in
                          connection with the offering of the Securities and
                          the shares of Stock issuable upon conversion thereof.
                          Any reference to the Offering Circular shall be
                          deemed to refer to and include the Company's Annual
                          Report on Form 10-K for the fiscal year ended
                          December 31, 1996 (the "Form 10-K"), the Quarterly
                          Reports on Form 10-Q for the quarters ended March 31,
                          1997 and June 30, 1997 (the "Quarterly Reports"),
                          excerpts from the Proxy Statement for the Annual
<PAGE>   2

                          Meeting of Stockholders on April 30, 1997 (the "Proxy
                          Statement"), attached to and made a part of the
                          Offering Circular, and all subsequent documents filed
                          by the Company with the United States Securities and
                          Exchange Commission (the "Commission") pursuant to
                          Section 13(a), 13(c) or 15(d) of the United States
                          Securities Exchange Act of 1934, as amended (the
                          "Exchange Act"), on or prior to the date of the
                          Offering Circular and any reference to the Offering
                          Circular, as amended or supplemented, as of any
                          specified date, shall be deemed to include (i) any
                          documents filed with the Commission by the Company
                          pursuant to Section 13(a), 13(c) or 15(d) of the
                          Exchange Act after the date of the Offering Circular
                          and prior to such specified date and (ii) any
                          Additional Issuer Information (as defined in Section
                          5(g)) furnished by the Company prior to the
                          completion of the distribution of the Securities; and
                          all documents filed under the Exchange Act by the
                          Company and so deemed to be included in the Offering
                          Circular or any amendment or supplement thereto are
                          hereinafter called the "Exchange Act Reports". The
                          Exchange Act Reports, when they were or are filed
                          with the Commission, conformed or will conform in all
                          material respects to the applicable requirements of
                          the Exchange Act and the applicable rules and
                          regulations of the Commission thereunder. The
                          Offering Circular and any amendments or supplements
                          thereto did not and will not, and the Exchange Act
                          Reports did not or will not, as of their respective
                          dates, contain an untrue statement of a material fact
                          or omit to state a material fact necessary in order
                          to make the statements therein, in the light of the
                          circumstances under which they were made, not
                          misleading; provided, however, that this
                          representation and warranty shall not apply to any
                          statements or omissions made in reliance upon and in
                          conformity with information furnished in writing to
                          the Company by a Purchaser through Goldman, Sachs &
                          Co. expressly for use therein;

                 (2)      This Purchase Agreement (this "Agreement") has been,
                          and prior to the First Time of Delivery the
                          Registration Rights Agreement will be, duly and
                          validly authorized, executed and delivered by the
                          Company and this Agreement constitutes, and the
                          Registration Rights Agreement when delivered as
                          contemplated herein will constitute, a valid and
                          binding obligation of the Company;

                 (3)      Each of the Company and the subsidiaries of the
                          Company listed on Schedule II hereto (collectively,
                          the "Subsidiaries"), is a corporation or partnership
                          duly organized, validly existing and in good standing
                          under the laws of its jurisdiction of incorporation
                          or organization, and has the power and authority to
                          conduct its business as it is currently being
                          conducted and to own or lease its properties. Each of
                          the Company and the Subsidiaries is duly qualified
                          and in good standing (other than entities that are
                          organized as limited partnerships for which no
                          representation as to good standing need be expressed)
                          as a foreign corporation or foreign partnership
                          authorized to do business in each jurisdiction in
                          which the nature of its business or its ownership or
                          leasing of property requires such qualification and
                          where the failure to be so qualified would,
                          individually or in the aggregate, have a material
                          adverse effect on the condition (financial or
                          otherwise), business, prospects or results of
                          operations of the Company and the Subsidiaries,
                          considered as a whole. All of the outstanding shares
                          of capital stock and partnership interests of each
                          Subsidiary have been duly authorized and validly
                          issued and are fully paid and nonassessable. All of
                          the outstanding shares of capital stock and
                          partnership interests of each Subsidiary are owned of
                          record by the Company or another Subsidiary, and are
                          owned beneficially, directly or indirectly, by the
                          Company free and clear of all restrictions on
                          transfer, liens, encumbrances, equities and claims;
                          provided, however, that with respect to DSC Japan
                          Incorporated, a Japanese corporation, Netman A/S, a
                          Danish corporation and TMN Udviklling I/S, a joint
                          venture of a subsidiary of the Company, the Company
                          owns, directly or indirectly, of



                                                  -2-

<PAGE>   3
                          record and beneficially 95%, 60% and 99%,
                          respectively, of the outstanding voting securities or
                          partnership interests of each such Subsidiary. Except
                          for the Subsidiaries, the Company has no subsidiaries
                          or affiliated companies and does not control,
                          directly or indirectly, any other business entity.
                          Complete and correct copies of the certificate of
                          incorporation and of the by-laws or other
                          organizational documents of the Company and each
                          Subsidiary and all amendments thereto have been
                          delivered to, or have been made available for
                          inspection by, the Purchasers, and (except as
                          contemplated by the Offering Circular) no changes
                          therein will be made subsequent to the date hereof
                          and prior to the earlier of (i) the expiration of the
                          Purchasers' over allotment option, or (ii) the Second
                          Time of Delivery (as defined below);

                 (4)      The Securities have been duly authorized by the
                          Company and, when issued and delivered pursuant to
                          this Agreement and the Indenture (hereinafter
                          defined), will have been duly executed,
                          authenticated, issued and delivered and will
                          constitute valid and legally binding obligations of
                          the Company, enforceable in accordance with their
                          terms, subject, as to enforcement, to bankruptcy,
                          insolvency, reorganization and other laws of general
                          applicability relating to or affecting creditors'
                          rights and to general equity principles and entitled
                          to the benefits provided by the Indenture to be dated
                          as of August 12, 1997 (the "Indenture") between the
                          Company and The Bank of New York, as trustee (the
                          "Trustee"), under which they are to be issued and the
                          Registration Rights Agreement; the Indenture has been
                          duly authorized and, when executed and delivered by
                          the parties thereto, will constitute a valid and
                          legally binding instrument, enforceable in accordance
                          with its terms, subject, as to enforcement, to
                          bankruptcy, insolvency, reorganization and other laws
                          of general applicability relating to or affecting
                          creditors' rights and to general equity principles;
                          and the Securities and the Indenture will conform to
                          the descriptions thereof in the Offering Circular and
                          will be in substantially the form previously
                          delivered to you;

                 (5)      The Company has an authorized capitalization as set
                          forth in by the Offering Circular and all the
                          outstanding shares of capital stock of the Company
                          have been duly authorized and validly issued and are
                          fully paid, nonassessable and free of preemptive
                          rights; the shares of Stock initially issuable upon
                          conversion of the Securities have been duly
                          authorized and reserved for issuance and, when issued
                          and delivered in accordance with the terms of the
                          Securities and Indenture, will be duly authorized,
                          validly issued, fully paid and nonassessable, will be
                          sold free and clear of any pledge, lien, security
                          interest, encumbrance, claim or equitable interest
                          and, at each Time of Delivery, will conform to the
                          description of the Stock contained in the Offering
                          Circular. No preemptive right, co-sale right,
                          registration right, right of first refusal or other
                          similar right of stockholders (in each case granted
                          or agreed to by the Company or by which the  Company
                          is or may be bound), exists or will exist at any time
                          of issuance with respect to the Securities or any of
                          the shares of Stock initially issuable upon
                          conversion of the Securities, other than the
                          Registration Rights Agreement. The Preferred Stock
                          Purchase Rights related to the shares of Stock
                          issuable upon conversion of the Securities have been
                          duly and validly authorized and, when issued and
                          delivered with the shares of the Stock to be issued
                          and delivered as provided herein will have been
                          validly issued and shall become binding obligations
                          of the Company, entitled to the benefits of the
                          Rights Agreement, dated as of April 25, 1996 (as
                          amended, the "Rights Agreement"), between the Company
                          and KeyCorp Shareholder Services, Inc., as Rights
                          Agent, and enforceable in accordance with their
                          terms;

                 (6)      The Securities, the Stock, the Preferred Stock
                          Purchase Rights and the Company's authorized
                          Preferred Stock, par value $1.00 per share (the
                          "Preferred Stock")





                                      -3-
<PAGE>   4
                          conform to the respective descriptions thereof
                          included in the Offering Circular and the Exchange
                          Act Reports. The description of the Company's stock
                          option and restricted stock, stock bonus, stock
                          purchase and other stock plans or arrangements, and
                          the options or other rights granted and exercised
                          thereunder, set forth in the Form 10-K accurately and
                          fairly presents the information required to be shown
                          with respect to such plans, arrangements, options and
                          rights.  Except as set forth in the Offering
                          Circular, except for options and restricted stock
                          issued in the ordinary course after the date hereof
                          under the Company's existing stock option and
                          restricted stock, stock bonus, stock purchase and
                          other stock plans or arrangements, the Company does
                          not have outstanding, and at each Time of Delivery
                          will not have outstanding, any options to purchase,
                          or any rights or warrants to subscribe for, or any
                          securities or obligations convertible into, or any
                          contracts or commitments to issue or sell, any shares
                          of Stock, any shares of capital stock of any
                          subsidiary or any such warrants, convertible
                          securities or obligations;

                 (7)      Neither the Company nor any Subsidiary is in
                          violation of its respective charter, bylaws or other
                          organizational documents and neither the Company nor
                          any Subsidiary is in default in the performance of
                          any obligation, agreement or condition contained in
                          any bond, debenture, note or any other evidence of
                          indebtedness or in any indenture or other instrument
                          or agreement material to the condition (financial or
                          otherwise), business, prospects or results of
                          operations of the Company and the Subsidiaries,
                          considered as a whole, to which the Company or any
                          Subsidiary is a party or by which the Company or any
                          Subsidiary or any of their respective properties is
                          bound. The execution, delivery and performance of
                          this Agreement and the Registration Rights Agreement,
                          the issue and sale of the Securities in the manner
                          contemplated in this Agreement and the Offering
                          Circular, and the compliance by the Company with all
                          of the provisions of the Securities, the Indenture,
                          the Registration Rights Agreement and this Agreement
                          and the consummation of the transactions contemplated
                          hereby and thereby will not conflict with or
                          constitute a breach of any of the terms or provisions
                          of, or a default under, the charter, bylaws or other
                          organizational documents of the Company or any
                          Subsidiary, or any bond, debenture, note or other
                          evidence of indebtedness, indenture or instrument or
                          agreement to which the Company or any Subsidiary is a
                          party or by which the Company or any Subsidiary, or
                          any of their properties, is bound, or (assuming
                          compliance with applicable state securities and blue
                          sky laws) violate or conflict with any law,
                          administrative regulation or ruling or court order
                          applicable to the Company or any Subsidiary or to any
                          of their respective properties;

                 (8)      Except for the registration of the Securities and the
                          Stock initially issuable upon the conversion thereof
                          under the Act as contemplated by the Registration
                          Rights Agreement, the qualification of the Indenture
                          under the Trust Indenture Act of 1939 as contemplated
                          by the Registration Rights Agreement, the
                          qualification of the Stock issuable upon conversion
                          of the Securities for quotation on the NASDAQ
                          National Market and such consents, approvals,
                          authorizations, registrations or qualifications as
                          may be required under state or foreign securities or
                          blue sky laws in connection with the purchase and
                          distribution of the Securities by the Purchasers or
                          in connection with the Company's performance of its
                          obligations under the Registration Rights Agreement,
                          no consent, approval, authorization, order,
                          registration or qualification of or with any such
                          court or governmental agency or body is required for
                          the issue and sale of the Securities, the shares of
                          Stock issuable upon conversion of the Securities or
                          the consummation by the Company of the transactions
                          contemplated by this Agreement, the Registration
                          Rights Agreement or the Indenture;





                                      -4-
<PAGE>   5
                 (9)      Except as disclosed in the Offering Circular, there
                          is no material litigation or governmental proceeding
                          pending to which the Company or any Subsidiary is a
                          party or of which any of their respective properties
                          is the subject, and no such litigation or proceeding
                          is or has been threatened or, to the best of the
                          Company's knowledge, is contemplated;

                 (10)     The consolidated financial statements and related
                          schedules (including the related notes) of the
                          Company included or incorporated by reference in the
                          Offering Circular present fairly the consolidated
                          financial condition, the consolidated results of
                          operations and consolidated cash flows of the Company
                          and its consolidated results of operations and
                          consolidated cash flows of the Company and its
                          consolidated subsidiaries at the dates and for the
                          periods indicated and have been prepared in
                          accordance with generally accepted accounting
                          principles applied on a consistent basis throughout
                          the periods indicated, except as disclosed therein.
                          All historical financial statements and schedules of
                          the Company required to be included in the Form 10-K
                          under the Exchange Act or the rules and regulations
                          thereunder are included therein. Ernst & Young (the
                          "Accountants"), who have certified certain financial
                          statements of the Company and the Subsidiaries, are
                          independent accountants with respect to the Company
                          as required by the Act and the rules and regulations
                          of the Commission thereunder. No financial statements
                          or schedules of any of the Company's subsidiaries
                          that are required to be included or incorporated by
                          reference in the Form 10-K are not so included or
                          incorporated by reference;

                 (11)     The Company and its Subsidiaries have good and
                          indefeasible title in fee simple to all real property
                          and good and indefeasible title to all personal
                          property owned by them, in each case free and clear
                          of all liens, encumbrances and defects except such as
                          are described in the Offering Circular or such as do
                          not materially affect the value of such property and
                          do not interfere with the use made and proposed to be
                          made of such property by the Company and its
                          Subsidiaries; and any real property and buildings
                          held under lease by the Company and its Subsidiaries
                          are held by them under valid, subsisting and
                          enforceable leases with such exceptions as are not
                          material and do not interfere with the use made and
                          proposed to be made of such property and buildings by
                          the Company and its Subsidiaries;

                 (12)     Each of the Company and the Subsidiaries is in
                          possession of and operating in compliance with all
                          licenses, permits, franchises certificates and
                          approvals necessary to conduct its business and to
                          own or lease its properties, all of which are valid
                          and in full force and effect, except where the
                          failure to so operate would not, individually or in
                          the aggregate, have a material adverse effect on the
                          condition (financial or otherwise), business,
                          prospects or results of operations of the Company and
                          the Subsidiaries, considered as a whole. Each of the
                          Company and the Subsidiaries is operating in
                          compliance with all laws, regulations, administrative
                          orders or rulings or court decrees applicable to it
                          or to any of its property, except where the failure
                          to so operate would not, individually or in the
                          aggregate, have a material adverse effect on the
                          condition (financial or otherwise), business,
                          prospects or results of operations of the Company and
                          the Subsidiaries, considered as whole;

                 (13)     Neither the Company nor any of its subsidiaries has
                          sustained since the date of the latest audited
                          financial statements included in the Offering
                          Circular any material loss or interference with its
                          business from fire, explosion, flood or other
                          calamity, whether or not covered by insurance, or
                          from any labor dispute or court or governmental
                          action, order or decree, other than as set forth or
                          contemplated in the Offering Circular; and subsequent
                          to the respective dates as of which information is
                          given in the Offering Circular, and except as set
                          forth in the Offering Circular, neither the





                                      -5-
<PAGE>   6
                          Company nor any of the Subsidiaries has incurred any
                          material liabilities or obligations, direct or
                          contingent, or entered into any material transactions
                          not in the ordinary course of business, and there has
                          not been any material adverse change, or any
                          development involving a prospective material adverse
                          change, in the condition (financial or otherwise),
                          business, prospects or results of operations of the
                          Company and the Subsidiaries, considered as a whole,
                          or any change in the capital stock or long-term debt
                          of the Company and the Subsidiaries, considered as a
                          whole, other than as a result of the issuance of
                          shares of Stock upon (i) the exercise of employee
                          stock options granted at least 60 days prior to the
                          date hereof and outstanding on the date hereof and
                          (ii) the exercise of rights by employees pursuant to
                          other stock bonus, restricted stock, stock purchase
                          and other stock plans or arrangements and other
                          employee benefit plans of the Company in effect on
                          the date hereof. Neither the Company nor any
                          Subsidiary has any contingent obligations which are
                          required to be disclosed and are not disclosed in the
                          Offering Circular which would be reasonably likely to
                          have a material adverse effect on the condition
                          (financial or otherwise), business, prospects or
                          results of operations of the Company and the
                          Subsidiary, considered as a whole;

                 (14)     The Company keeps books, records and accounts, which,
                          in reasonable detail, accurately and fairly reflect
                          the transactions and dispositions of the Company's
                          assets. The Company maintains a system of internal
                          accounting controls sufficient to provide reasonable
                          assurances that (i) transactions are executed in
                          accordance with management's general or specific
                          authorizations; (ii) transactions are recorded as
                          necessary to permit preparation of financial
                          statements in conformity with generally accepted
                          accounting principles and to maintain accountability
                          for assets; (iii) access to assets is permitted only
                          in accordance with management's general or specific
                          authorization; and (iv) the recorded accountability
                          for assets is compared with existing assets at
                          reasonable intervals and appropriate action is taken
                          with respect to any differences;

                 (15)     Each contract to which the Company or any Subsidiary
                          is a party and which is material to the condition
                          (financial or otherwise), business, prospects or
                          results of operations of the Company and the
                          Subsidiaries, considered as a whole, has been duly
                          authorized, executed and delivered and is in full
                          force and effect in accordance with its terms. None
                          of such contracts has been assigned by the Company or
                          any Subsidiary, and the Company knows of no present
                          condition or fact that would prevent compliance in
                          all material respects by the Company, any Subsidiary
                          or any other party thereto with the terms of any such
                          contract. The Company has no present intention of
                          exercising any right that it or any Subsidiary may
                          have to cancel any of its or any Subsidiary's rights
                          or obligations under any such contract and has not
                          knowledge that any other party to any such contract
                          has any intention not to render full performance in
                          all material respects under such contract. No
                          contract or document or a charter required to be
                          described in the Exchange Act Reports or to be filed
                          as an exhibit thereto is not so described or filed as
                          required;

                 (16)     Except as disclosed in the Offering Circular, no
                          customer or supplier that was significant to the
                          Company during the year ended December 31, 1996, or
                          that has been significant to the Company thereafter,
                          has given notice to the Company that it has
                          terminated, materially reduced or threatened to
                          terminate or materially reduce its purchases from or
                          provision of products or services to the Company, as
                          the case may be, and to the best of the Company's
                          knowledge, no such action is contemplated, except in
                          any such case for terminations, reductions or
                          threatened terminations or reductions that would not,
                          individually or in the aggregate, have a material
                          adverse effect on the condition (financial or
                          otherwise), business, prospects





                                      -6-
<PAGE>   7
                          or results or operations of the Company and the
                          Subsidiaries, considered as a whole;

                 (17)     The Company and the Subsidiaries own or have licenses
                          with respect to all inventions, patents, copyrights,
                          know-how (including trade secrets and other
                          unpatented or unpatentable proprietary or
                          confidential information, systems or procedures),
                          trademarks, service marks and trade names presently
                          used by the Company or any Subsidiary in connection
                          with the business now operated by the Company and the
                          Subsidiaries, with such exceptions as would not,
                          individually or in the aggregate, have a material
                          adverse effect on the condition (financial or
                          otherwise), business, prospects or results of
                          operations of the Company and the Subsidiaries,
                          considered as a whole.  Neither the Company nor any
                          Subsidiary has received any notice of any claim that
                          the Company or any Subsidiary has infringed or is
                          infringing any patent, copyright, trademark, trade
                          secret, or other intellectual property right of
                          another, which, individually or in the aggregate, if
                          the subject of an unfavorable decision, ruling or
                          finding, would have a material adverse effect on the
                          condition (financial or otherwise), business,
                          prospects or results of operations of the Company and
                          the Subsidiaries, considered as a whole. The Company
                          is not aware of any basis for any assertion by
                          another that any of its intellectual property rights
                          are or have been infringed by the Company or any
                          Subsidiary which, individually or in the aggregate,
                          if the subject of an unfavorable decision, ruling or
                          finding, would have a material adverse effect on the
                          condition (financial or otherwise), business,
                          prospects or results of operations of the Company and
                          the Subsidiaries, considered as a whole. The Company
                          has taken reasonable steps to maintain as
                          confidential the design information and software
                          which have been developed by the Company;

                 (18)     Prior to the First Time of Delivery, you will receive
                          executed agreements, in the form of Exhibit B hereto,
                          of each of the persons specified on Schedule III
                          hereto, which agreements shall provide that each such
                          person shall not, directly or indirectly, sell,
                          contract to sell or otherwise dispose of any
                          Securities, shares of Stock, rights to acquire such
                          shares or securities convertible into or exchangeable
                          for Stock during the lock-up period specified therein
                          without obtaining your prior written consent;

                 (19)     The statements set forth in the Offering Circular
                          under the captions "Description of Notes" and
                          "Description of Capital Stock," insofar as they
                          purport to constitute a summary of the terms of the
                          Securities, the capital stock of the Company and the
                          documents and laws therein described, and under the
                          captions "Notice to Investors", "United States
                          Taxation," and "Offer and Resale," insofar as they
                          purport to describe the provisions of the laws and
                          documents referred to therein, fairly present the
                          information with respect to such legal matters and
                          documents and fairly summarize relevant provisions of
                          the Company's Restated Certificate of Incorporation
                          and Amended and Restated Bylaws, each as amended to
                          date, the Indenture, the Registration Rights
                          Agreement, this Agreement, the laws of the State of
                          Delaware and other matters referred to therein;

                 (20)     The Company is subject to Section 13 or 15(d) of the
                          Exchange Act and is a reporting issuer as such term
                          is defined by Regulation S under the Act;

                 (21)     When the Securities are issued and delivered pursuant
                          to this Agreement, such Securities will not be of the
                          same class (within the meaning of Rule 144A under the
                          Act) as securities which are listed on a national
                          securities exchange registered under Section 6 of the
                          Exchange Act, or quoted on a U.S. automated
                          interdealer quotation system;





                                      -7-
<PAGE>   8
                 (22)     The Company is not, and after giving effect to the
                          offering and sale of the Securities or the issuance
                          of Stock upon conversion of the Securities, will not
                          be an "investment company" or an entity "controlled"
                          by an "investment company" as such terms are defined
                          in the United States Investment Company Act of 1940,
                          as amended (the "Investment Company Act");

                 (23)     Neither the Company nor any person acting on its
                          behalf has, with respect to any Securities sold in
                          the United States, offered or sold the Securities by
                          means of any general solicitation or general
                          advertising within the meaning of Rule 502(c) under
                          the Act or, with respect to Securities sold outside
                          the United States to non-U.S. persons (as defined in
                          Rule 902 under the Act), by means of any directed
                          selling efforts within the meaning of Rule 902 under
                          the Act and the Company, any affiliate of the Company
                          and any person acting on its or their behalf, has
                          complied with and will implement the offering
                          restriction requirements of such Rule 902;

                 (24)     Within the six months preceding the date hereof,
                          neither the Company nor any person acting on behalf
                          of the Company has offered or sold to any person any
                          Securities, any Stock or any security substantially
                          similar to the Securities or the Stock (other than,
                          in the case of Stock, sales of the Stock registered
                          on Form S-8) other than the Securities offered and
                          sold to the Purchasers hereunder. The Company will
                          observe reasonable precautions designed to ensure
                          that any offer or sale, direct or indirect, in the
                          United States or to any U.S. person of any
                          Securities, any Stock or any security substantially
                          similar to the Securities or the Stock issued by the
                          Company, within six months subsequent to the date on
                          which the distribution of the Securities has been
                          completed (as notified to the Company by Goldman,
                          Sachs & Co.), is made under restrictions and other
                          circumstances reasonably designed not to affect the
                          status of the offer and sale of the Securities and
                          the Stock issuable upon the conversion thereof in the
                          United States and to U.S. persons contemplated by
                          this Agreement as transactions exempt from the
                          registration requirements of the Act;

                 (25)     None of the holders of outstanding shares of capital
                          stock of the Company and no other person has or will
                          have any preemptive or other rights to purchase,
                          subscribe for or otherwise acquire (i) the shares of
                          Stock issuable upon conversion of the Securities or
                          any rights to such shares or (ii) as a result of or
                          in connection with the transactions contemplated by
                          the Indenture, the Registration Rights Agreement or
                          this Agreement, any other capital stock of the
                          Company or rights thereto; and no holder of
                          securities of the Company has rights, pursuant to any
                          agreement with the Company or otherwise, to register
                          such securities under any registration statement
                          filed with the Commission except as otherwise
                          disclosed in the Offering Circular;

                 (26)     None of the transactions contemplated by this
                          Agreement (including, without limitation, the use of
                          the proceeds from the sale of the Securities) will
                          violate or result in a violation of Section 7 of the
                          Exchange Act, or any regulation promulgated
                          thereunder, including, without limitation,
                          Regulations G, T, U, and X of the Board of Governors
                          of the Federal Reserve System;

                 (27)     The Company has not taken nor will it take, directly
                          or indirectly, any action designed to cause or result
                          in, or that has constituted or that might reasonably
                          be expected to cause or result in, stabilization or
                          manipulation of the price of any security of the
                          Company to facilitate the sale or resale of the
                          Securities or the Stock issued upon conversion of the
                          Securities or the sale by the Purchasers of any




                                      -8-
<PAGE>   9
                          
                          Securities or shares of Stock acquired by the
                          Purchasers in the course of the transactions
                          contemplated hereby;

                 (28)     The Company does no business with the government of
                          Cuba or with any person or affiliate located in Cuba
                          within the meaning of Section 517.075, Florida
                          Statutes; and

                 (29)     Neither the Company nor any Subsidiary is involved in
                          any material labor dispute nor, to the knowledge of
                          the Company, is any such dispute threatened;

         2.  Subject to the terms and conditions herein set forth, (a) the
Company agrees to issue and sell to each of the Purchasers, and each of the
Purchasers agrees, severally and not jointly, to purchase from the Company, at
a purchase price of 97.5% of the principal amount thereof, plus accrued
interest, if any, from August 12, 1997 to the Time of Delivery hereunder, the
principal amount of Securities set forth opposite the name of such Purchaser in
Schedule I hereto, and (b) in the event and to the extent that Goldman, Sachs &
Co. on behalf of the Purchasers shall exercise the election to purchase
Optional Securities as provided below, the Company agrees to issue and sell to
each of the Purchasers, and each of the Purchasers agrees, severally and not
jointly, to purchase from the Company, at the same purchase price set forth in
clause (a) of this Section 2, that portion of the aggregate principal amount of
the Optional Securities as to which such election shall have been exercised (to
be adjusted by you so as to eliminate denominations of less than $5,000)
determined by multiplying such aggregate principal amount of Optional
Securities by a fraction, the numerator of which is the maximum aggregate
principal amount of Optional Securities which such Purchaser is entitled to
purchase as set forth opposite the name of such Purchaser in Schedule I hereto
and the denominator of which is the maximum aggregate principal amount of
Optional Securities which all of the Purchasers are entitled to purchase
hereunder.

         The Company hereby grants to the Purchasers the right to purchase at
their election up to U.S.$100,000,000 aggregate principal amount of Optional
Securities, at the purchase price set forth in clause (a) of the first
paragraph of this Section 2, for the sole purpose of covering over allotments
in the sale of Firm Securities. Any such election to purchase Optional
Securities may be exercised by written notice from you to the Company, given
within a period of 30 calendar days after the date of this Agreement, setting
forth the aggregate principal amount of Optional Securities to be purchased and
the date on which such Optional Securities are to be delivered, as determined
by you but in no event earlier than the First Time of Delivery (as hereinafter
defined) or, unless you and the Company otherwise agree in writing earlier than
two or later than ten business days after the date of such notice.

         3.  Upon the authorization by you of the release of the Securities,
the several Purchasers propose to offer the Securities for sale upon the terms
and conditions set forth in this Agreement and the Offering Circular and each
Purchaser hereby represents and warrants to, and agrees with, the Company that:

                 (a)  It will offer and sell the Securities only: (i) to
         persons who it reasonably believes are "qualified institutional
         buyers" ("QIBs") within the meaning of Rule 144A under the Act in
         transactions meeting the requirements of Rule 144A,  or (ii) upon the
         terms and conditions set forth in Annex I to this Agreement;

                 (b)  It will not offer or sell the Securities by any form of
         general solicitation or general advertising, including but not limited
         to the methods described in Rule 502(c) under the Act; and

                 (c)  Goldman, Sachs & Co., through Goldman Sachs
         International, as its selling agent, only may offer or sell Notes in
         Japan pursuant to an exemption from the registration requirements of
         the securities and exchange laws of Japan and in compliance with any
         other applicable requirements of Japanese law.





                                      -9-
<PAGE>   10
         4.      (a)  The Securities to be purchased will initially be
         represented by one or more definitive global Securities in book-entry
         form which will be deposited by or on behalf of the Company with The
         Depository Trust Company ("DTC") or its designated custodian. The
         Company will deliver the global Securities in book-entry form to the
         Purchasers, against payment by or on behalf of the Purchasers of the
         purchase price therefor by certified or official bank check or checks,
         or by wire transfer, payable to the order of the Company in Federal
         (same day) funds, by causing DTC to credit the Securities to the
         respective accounts of the Purchasers, at DTC.  The portion of the
         Securities to be evidenced by the temporary global Security shall be
         in the aggregate principal amount deposited with such depositary and
         will be delivered by credit to the account of GSI, unless otherwise
         directed by GSI, and the portion of the Securities to be resold in
         registered form shall be delivered at the office of Goldman, Sachs &
         Co., at 85 Broad Street, New York, New York 10004, in such
         denominations and registered in such names as Goldman, Sachs & Co.,
         may request, in each case against payment by the Purchasers or on
         their behalf of the purchase price therefor in United States dollars
         in immediately available funds. The Company will cause the
         certificates representing the Securities in book-entry form to be
         deposited with DTC to be made available to Goldman, Sachs & Co. for
         checking at least twenty-four hours prior to the Time of Delivery at
         the office of DTC or its designated custodian (the "Designated
         Office"). The time and date of such delivery and payment shall be,
         with respect to the Firm Securities, 9:00 a.m., New York City time, on
         August 12, 1997 or such other time and date as Goldman, Sachs & Co.
         and the Company may agree upon in writing and, with respect to the
         Optional Securities, 9:00 a.m., New York City time, on the date
         specified by Goldman, Sachs & Co. in the written notice given by
         Goldman, Sachs & Co. of the Purchasers' election to purchase such
         Optional Securities, or such other time and date as Goldman, Sachs &
         Co. and the Company may agree upon in writing. Such time and date for
         delivery of the Firm Securities is herein called the "First Time of
         Delivery", such time and date for delivery of the Optional Securities,
         if not the First Time of Delivery, is herein called the "Second Time
         of Delivery", and each such time and date for delivery is herein
         called a "Time of Delivery".

                 (b)  The documents to be delivered at each Time of Delivery by
         or on behalf of the parties hereto pursuant to Section 7 hereof,
         including the cross-receipt for the Securities and any additional
         documents requested by the Purchasers pursuant to Section 7(h) hereof,
         will be delivered at the offices of Sullivan & Cromwell, 125 Broad
         Street, New York, New York 10004 (the "Closing Location"), and the
         Securities will be delivered (subject to Section 4(a) hereof) at the
         offices of Goldman, Sachs & Co., all at such Time of Delivery. A
         meeting will be held at the Closing Location at 3:00 p.m., New York
         City time, on the New York Business Day next preceding the Time of
         Delivery, at which meeting the final drafts of the documents to be
         delivered pursuant to the preceding sentence will be available for
         review by the parties hereto. For the purposes of this Section 4, "New
         York Business Day" shall mean each Monday, Tuesday, Wednesday,
         Thursday and Friday which is not a day on which banking institutions
         in New York City are generally authorized or obligated by law or
         executive order to close.

         5.  The Company agrees with each of the Purchasers:

                 (a)  To prepare the Offering Circular in a form approved by
         you; to make no amendment or supplement to the Offering Circular which
         shall be disapproved by you promptly after reasonable notice thereof;
         and to furnish you with copies thereof;

                 (b)  Promptly from time to time to take such action as you may
         reasonably request to qualify such Securities and the shares of Stock
         issuable upon conversion thereof for offering and sale under the
         securities laws of such jurisdictions in the United States as you may
         request and to comply with such laws so as to permit the continuance
         of sales and dealings therein in such jurisdictions for as long as may
         be necessary to complete the distribution of such Securities and the
         shares of Stock issuable upon conversion thereof, provided that in
         connection therewith the Company shall not be required to qualify as a
         foreign corporation or to file a general consent to service of process
         in any jurisdiction;





                                      -10-
<PAGE>   11
                 (c)  To furnish the Purchasers with three copies of the
         Offering Circular and each amendment or supplement thereto signed by
         an authorized officer of the Company with the independent accountants'
         report(s) in the Offering Circular, and any amendment or supplement
         containing amendments to the financial statements covered by such
         report(s), signed by the accountants, and additional copies thereof in
         such quantities as you may from time to time reasonably request, and,
         if, at any time prior to the expiration of nine months after the date
         of the Offering Circular, any event shall have occurred as a result of
         which the Offering Circular as then amended or supplemented would
         include an untrue statement of a material fact or omit to state any
         material fact necessary in order to make the statements therein, in
         the light of the circumstances under which they were made when such
         Offering Circular is delivered, not misleading, or, if for any other
         reason it shall be necessary during such same period to amend or
         supplement the Offering Circular, to notify you, and upon your request
         to prepare and furnish without charge to each Purchaser and to any
         dealer in securities as many copies as you may from time to time
         reasonably request of an amended Offering Circular or a supplement to
         the Offering Circular which will correct such statement or omission or
         effect such compliance;

                 (d)  During the period beginning from the date hereof and
         continuing to and including the 90th day after the date of the
         Offering Circular, not to, directly or indirectly, offer, sell,
         contract to sell or otherwise dispose of any securities of the Company
         (other than a registration statement relating to Common Stock that the
         Company may sell pursuant to clauses (a) and (b) below) that are
         substantially similar to the Securities or the Stock, including but
         not limited to any securities of the Company convertible into or
         exchangeable or exercisable for shares of Stock or substantially
         similar securities, without your prior written consent, other than (a)
         pursuant to stock option and restricted stock, stock bonus, stock
         purchase or other stock plans or arrangements existing as of the date
         hereof or in connection with other employee incentive compensation
         arrangements consistent with past practice, or upon the exercise of
         options heretofore or hereafter granted pursuant to such plans or
         arrangements, or (b) shares of Common Stock issued as consideration
         for acquisitions of businesses, properties or assets, provided that
         each recipient of any such shares of Common Stock so issued in
         connection with any such acquisition shall agree in writing for the
         benefit of the Purchasers, in form and substance satisfactory to
         Goldman, Sachs & Co., that all such shares of Common Stock shall
         remain subject to restrictions identical to those contained in this
         sentence (excluding the restriction on the filing of a registration
         statement, which shall not apply to a registration statement filed
         with respect to such shares of Common Stock if filed after 10 days'
         notice to Goldman, Sachs & Co.);

                 (e)  To use the net proceeds received by it from the sale of
         the Securities pursuant to this Agreement in the manner specified in
         the Offering Circular under the caption "Use of Proceeds";

                 (f)  Not to be or become, at any time prior to the expiration
         of two years after the latest Time of Delivery for the Securities, an
         open-end investment company, unit investment trust, closed-end
         investment company or face-amount certificate company that is or is
         required to be registered under Section 8 of the Investment Company
         Act;

                 (g)  At any time when the Company is not subject to Section 13
         or 15(d) of the Exchange Act, for the benefit of holders from time to
         time of Securities and the Stock issuable upon conversion thereof, to
         furnish at its expense, upon request, to holders of Securities and the
         Stock issuable upon conversion thereof and prospective purchasers of
         Securities and the Stock issuable upon conversion thereof information
         (the "Additional Information") satisfying the requirements of
         subsection (d)(4)(i) of Rule 144A under the Act;

                 (h)  To use its best efforts to cause the Securities sold in
         reliance on Rule 144A and the Stock issuable upon conversion thereof
         to be eligible for the PORTAL trading system of the National
         Association of Securities Dealers, Inc.;





                                      -11-
<PAGE>   12
                 (i)  To file with the Commission not later than 15 days after
         the Time of Delivery, five copies of a notice on Form D under the Act
         (one of which will be manually signed by a person duly authorized by
         the Company); to otherwise comply with the requirements of Rule 503
         under the Act; and to furnish promptly to you evidence of each such
         required timely filing (including a copy thereof);

                 (j)  During the period of two years (or, if shorter, the
         holding period provided by Rule 144(k) under the Act) after the latest
         Time of Delivery, the Company will not, and will not permit any of its
         "affiliates" (as defined by Rule 144 under the Act) to, resell any
         Securities or Stock issued upon conversion thereof (so long as such
         Stock constitutes a "restricted security" as defined in Rule 144 under
         the Act) that have been reacquired by any of them;

                 (k)  To reserve and keep available at all times, free of
         preemptive rights, out of its authorized but unissued shares of stock,
         shares of Stock for the purpose of enabling the Company to satisfy any
         obligations to issue shares of Stock upon conversion of the
         Securities;

                 (l)  Except as otherwise contemplated by the Indenture, to
         include a legend on the Securities offered and sold otherwise than in
         reliance on Regulation S and the Stock issuable upon the conversion
         thereof to the effect set forth under "Notice to Investors" in the
         Offering Circular;

                 (m) To furnish to the holders of the Securities as soon as
         practicable after the end of each fiscal year an annual report
         (including a balance sheet and statements of operations, stockholders'
         equity and cash flows of the Company and its consolidated subsidiaries
         certified by independent public accountants) and, as soon as
         practicable after the end of each of the first three quarters of each
         fiscal year (beginning with the fiscal quarter ending after the date
         of the Offering Circular), the financial information of the Company
         and its subsidiaries for such quarter contained in the Company's Form
         10-Q for such quarter as filed with the Commission or, if no such Form
         10-Q is filed, such financial information in reasonable detail;

                 (n)  During a period of five years from the date of the
         Offering Circular, to furnish to you copies of all reports or other
         communications (financial or other) furnished to stockholders, and
         deliver to you (i) as soon as they are available, copies of any
         reports and financial statements furnished to or filed with the
         Commission or any securities exchange on which the Securities or any
         class of securities of the Company is listed; and (ii) such additional
         information concerning the business and financial condition of the
         Company as you may from time to time reasonably request (such
         financial statements to be on a consolidated basis to the extent the
         accounts of the Company and its Subsidiaries are consolidated in
         reports furnished to its stockholders generally or to the Commission);
         and

                 (o)  To use its best efforts to have approved for quotation,
         subject to notice of issuance, the shares of Stock issuable upon
         conversion of the Securities on the Nasdaq National Market.

         6.  The Company covenants and agrees with the several Purchasers that
the Company will pay or cause to be paid the following: (i) the fees,
disbursements and expenses of the Company's counsel and accountants and all
other expenses of the Company in connection with the issue of the Securities
and the issue and listing of the Stock issuable upon conversion thereof, the
preparation and delivery of the Securities in temporary and definitive forms,
the preparation and printing of [the Preliminary Offering Circular and] the
Offering Circular and any amendments and supplements thereto and the mailing
and delivering of copies thereof to the Purchasers and dealers; (ii) the cost
of printing or producing any Agreement among Purchasers, this Agreement, the
Indenture, the Registration Rights Agreement, any Blue Sky and Legal Investment
Memoranda, closing documents (including any compilations thereof) and any other
documents in connection with the offering, purchase, sale and delivery of the
Securities and the Stock issuable upon conversion thereof; (iii) the fees and
expenses of the Trustee and any agent of the Trustee and the fees and
disbursements of counsel for the Trustee and any such agent in connection with
the Indenture and the Securities; (iv) the fees and expenses of Euroclear,
CEDEL and any other depositary used in connection with the Securities and of





                                      -12-
<PAGE>   13
any transfer or conversion agent or registrar for the Securities or the Stock
issuable upon conversion of the Securities; (v) all expenses in connection with
the qualification of the Securities for trading in the PORTAL System of the
National Association of Securities Dealers, Inc. and the qualification of the
Stock issuable upon conversion of the Securities for inclusion on the NASDAQ
National Market; (vi) fees, if any, charged by securities rating services for
rating the Securities; (vii) all expenses in connection with the qualification
of the Securities and the shares of Stock issuable upon the conversion of the
Securities for offering and sale under state securities or Blue Sky laws as
provided in Section 5(b) hereof, including the fees and disbursements of
counsel for the Purchasers in connection with the Blue Sky surveys; and (viii)
all other costs and expenses incident to the performance of the Company's
obligations hereunder which are not otherwise specifically provided for in this
Section; and to indemnify and hold harmless the Purchasers from any documentary
stamp or similar issue tax and any related interest or penalties on the issue,
sale or delivery of the Securities to the Purchasers which are or may be due in
the United Kingdom or the United States of America. It is understood, however,
that, except as provided in this Section and Sections 8 and 11 hereof, the
Purchasers will pay all of their own costs and expenses, including the fees of
their counsel, transfer taxes on resale of any of the Securities by them, and
any advertising expenses connected with any offers they may make.

         7.  The obligations of the Purchasers hereunder at each Time of
Delivery shall be subject, in their discretion, to the condition that all
representations and warranties and other statements of the Company herein are,
at and as of such Time of Delivery, true and correct, the condition that the
Company shall have performed all of its obligations hereunder theretofore to be
performed, and the following additional conditions:

                 (a)  Sullivan & Cromwell, counsel for the Purchasers, shall
         have furnished to you such opinion or opinions, dated such Time of
         Delivery, with respect to the incorporation of the Company, the
         validity of the Indenture, the Securities, the shares of Stock
         issuable upon conversion of the Securities, the Offering Circular and
         other related matters as you may reasonably request, and such counsel
         shall have received such papers and information as they may reasonably
         request to enable them to pass upon such matters;

                 (b)  Baker & McKenzie, counsel for the Company, shall have
         furnished to you their written opinion or opinions, dated such Time of
         Delivery, in form and substance satisfactory to you, to the effect
         that:

                          (i)     The Company is organized and is validly
                 existing as a corporation in good standing under the laws of
                 the state of Delaware, with corporate power and authority to
                 own and lease its properties and conduct its business as now
                 conducted and as described in the Offering Circular;

                          (ii)    The Company has an authorized and issued
                 capital stock as set forth in the Offering Circular.  The
                 shares of Stock initially issuable upon conversion of the
                 Securities have been duly and validly authorized and reserved
                 for issuance and, when issued and delivered in accordance with
                 the provisions of the Securities and the Indenture, will be
                 duly and validly issued and fully paid and non-assessable, and
                 stockholders of the Company will have no preemptive rights
                 with respect to the issuance thereof. The Preferred Stock
                 Purchase Rights related to the shares of Stock to be initially
                 issuable upon conversion of the Securities have been duly and
                 validly authorized and, when issued and delivered with the
                 shares of Stock to be issued upon conversion of the
                 Securities, will have been validly issued and shall become
                 binding obligations of the Company, entitled to the benefits
                 of the Rights Agreement and enforceable in accordance with
                 their terms, subject, as to enforcement, to bankruptcy,
                 insolvency, reorganization, moratorium and other similar laws
                 relating to or affecting creditors' rights generally, to
                 general equity principles (regardless of whether such
                 enforceability is considered in a proceeding in equity or at
                 law);

                          (iii)   The Company has full legal right, power and
                 authority to enter into this Agreement, the Registration
                 Rights Agreement and the Indenture and to issue and sell the





                                      -13-
<PAGE>   14
                 Securities to be sold to the Purchasers as provided in Section
                 2 hereof. This Agreement and the Registration Rights Agreement
                 have been duly authorized, executed and delivered by the
                 Company. The Indenture has been duly authorized, executed and
                 delivered by the Company and constitutes a valid and legally
                 binding instrument, enforceable in accordance with its terms,
                 subject, as to enforcement, to bankruptcy, insolvency,
                 reorganization and other laws of general applicability
                 relating to or affecting creditors' rights and to general
                 equity principles (regardless of whether such enforceability
                 is considered in a proceeding in equity or at law).  No
                 consent, approval, authorization, order, registration or
                 qualification of or with any such court or governmental agency
                 or body is required for the issue and sale of the Securities
                 or the consummation by the Company of the transactions
                 contemplated by this Agreement, the Registration Rights
                 Agreement or the Indenture, except, such as may be required
                 under the Act in connection with the shares of Stock issuable
                 upon conversion of the Securities and such consents,
                 approvals, authorizations, registrations or qualifications as
                 may be required under state securities or Blue Sky laws in
                 connection with the purchase and distribution of the
                 Securities by the Purchasers;

                          (iv)    The Securities have been duly authorized by
                 the Company; the Securities have been duly executed,
                 authenticated, issued and delivered and constitute valid and
                 legally binding obligations of the Company entitled to the
                 benefits provided by the Indenture; and the Securities and the
                 Indenture conform to the descriptions thereof in the Offering
                 Circular;

                          (v)     The issue and sale of the Securities and the
                 performance by the Company of its obligations with respect to
                 the Securities, the Indenture, the Registration Rights
                 Agreement and this Agreement and the consummation of the
                 transactions herein and therein contemplated will not conflict
                 with or result in a breach or violation of any of the terms or
                 provisions of, or constitute a default by the Company under,
                 the Restated Certificate of Incorporation or Amended and
                 Restated Bylaws of the Company, each as amended to date or, to
                 the knowledge of such counsel, any statute, rule or regulation
                 or any judgement, decree or order of any court or governmental
                 agency or body applicable to the Company or any of its
                 properties;

                          (vi)    The performance of this Agreement, the
                 Registration Rights Agreement and the Indenture by the Company
                 and the consummation by the Company of the transactions herein
                 and therein contemplated will not result in a breach or
                 violation by any of the Significant Subsidiaries (other than
                 DSC Communications A/S, as to which no opinion need be
                 expressed) of any of the terms or provisions of, or constitute
                 a default by any of the Significant Subsidiaries (other than
                 DSC Communications A/S, as to which no opinion need be
                 expressed) under the charter, bylaws or other organizational
                 documents, of any of the Significant Subsidiaries (other than
                 DSC Communications A/S, as to which no opinion need be
                 expressed).  For purposes of this Agreement, the term
                 "Significant Subsidiaries" means DSC Finance Corporation, DSC
                 International Corporation, DSC Telecommunications Corporation,
                 DSC Marketing Services, Inc., each a Delaware corporation; DSC
                 Telecom, Inc., a Nevada corporation; DSC Telecom L.P., a Texas
                 limited partnership; and DSC Communications A/S, a Danish
                 corporation;

                          (vii)   To the best of our knowledge the Company is
                 not in violation of its Restated Certificate of Incorporation
                 and Amended and Restated Bylaws, each as amended to date;

                          (viii)  The statements set forth in the Offering
                 Circular under the captions "Description of Notes" and
                 "Description of Capital Stock", insofar as they purport to
                 constitute a summary of the terms of the Securities and the
                 Stock, under the caption "Taxation", and under the caption
                 "Offer and Resale", insofar as they purport to describe the
                 provisions of the laws and documents referred to therein,
                 fairly present the information with respect to such legal
                 matters and documents and fairly summarize relevant provisions
                 of the Company's





                                      -14-
<PAGE>   15
                 Restated Certificate of Incorporation and Amended and Restated
                 Bylaws, each as amended to date, the Indenture, the
                 Registration Rights Agreement, this Agreement, the laws of the
                 State of Delaware and other matters referred to therein;

                          (ix)    No registration of the Securities under  the
                 Act, and no qualification of the Indenture under the United
                 States Trust Indenture Act of 1939 with respect thereto, is
                 required for the offer, sale and initial resale of the
                 Securities by the Purchasers in the manner contemplated by
                 this Agreement;

                          (x)     The Company is not an "investment company" or
                 an entity "controlled" by an "investment company", as such
                 terms are defined in the Investment Company Act; and

                          (xi)    The Exchange Act Reports (other than the
                 financial statements and related scheduled therein, as to
                 which such counsel need express no opinion), when they were
                 filed with the Commission, complied as to form in all material
                 respects with the requirements of the Exchange Act, and the
                 rules and regulations of the Commission thereunder.

                          In addition, such counsel shall state that it has
                 participated in conferences with officers and other
                 representatives of the Company, independent public accountants
                 for the Company, and the Purchasers in connection with the
                 preparation of the Offering Circular and has considered the
                 matters stated therein and the statements contained therein,
                 although such counsel has not independently verified the
                 accuracy, completeness or fairness of such statements (except
                 to the extent stated in paragraph (viii)); and such counsel
                 shall advise you, on the basis of the foregoing (relying as to
                 materiality to a certain extent upon facts provided to such
                 counsel by officers and other representatives of the Company
                 and, except to the extent indicated above, without independent
                 check or verification) that no facts have come to such
                 counsel's attention that have caused it to believe that the
                 Offering Circular (including the documents and information
                 incorporated by reference therein) or any amendment or
                 supplement thereto (other than the financial statements, notes
                 and schedules and other financial data included therein, as to
                 which such counsel need express no belief or comment), as of
                 its date contained, or as of the Time of Delivery contains,
                 any untrue statement of a material fact or as of its date
                 omitted, or as of the Time of Delivery omits, to state a
                 material fact necessary to make the statements therein, in the
                 light of the circumstances under which they were made, not
                 misleading.

                          In giving such opinion, such counsel may state that
                 insofar as such opinion involves factual matters, it has
                 relied, to the extent it has deemed proper, upon certificates
                 of officers of the Company and certificates of public
                 officials.

                 (c)  George B. Brunt, Vice President, General counsel and
         Secretary of the Company, shall have furnished to you his written
         opinion, dated such Time of Delivery, in form and substance
         satisfactory to you, to the effect that:

                          (i)     The Company is organized and is validly
                 existing as a corporation in good standing under the laws of
                 the state of Delaware, with corporate power and authority to
                 own and lease its properties and conduct its business as now
                 conducted and as described in the Offering Circular;

                          (ii)    No authorization, consent or approval of any
                 governmental authority or agency of or within the United
                 States is required in connection with the transactions
                 contemplated by this Agreement or the Indenture, except such
                 as may be required under the Act in connection with the shares
                 of Stock issuable upon conversion of the Securities and such
                 consents, approvals, authorizations, registrations or
                 qualifications as may be required





                                      -15-
<PAGE>   16
                 under state securities or Blue Sky laws in connection with the
                 purchase and distribution of the Securities by the Purchasers;

                          (iii)   The Company has an authorized and issued
                 capital stock as set forth in the Offering Circular. All of
                 the outstanding shares of Stock  have been duly authorized and
                 validly issued and are fully paid and nonassessable, and such
                 shares were not issued in violation of any preemptive rights
                 provided for by law or by the Company's Restated Certificate
                 of Incorporation or Amended and Restated Bylaws. The Stock,
                 the Preferred Stock Purchase Rights and the Preferred Stock
                 conform to the respective descriptions thereof included in the
                 Offering Circular;

                          (iv)    Each of the Significant Subsidiaries is
                 organized and validly existing and in good standing (other
                 than entities that are organized as limited partnerships for
                 which no opinion as to good standing need be expressed) under
                 the laws of its jurisdiction of organization, with the power
                 and authority to own or lease its properties and to conduct
                 its business as now conducted and as described in the Offering
                 Circular. All of the outstanding shares of capital stock of
                 each Significant Subsidiary have been duly authorized and
                 validly issued and are fully paid and nonassessable. All of
                 the outstanding shares of capital stock of each Significant
                 Subsidiary, or partnership interests, as applicable, are owned
                 of record by the Company, and, to the knowledge of such
                 counsel, are owned beneficially, directly or indirectly, by
                 the Company free and clear of all restrictions on transfer,
                 liens, encumbrances, equities and claims;

                          (v)     Each of the Company and the Significant
                 Subsidiaries is duly qualified and in good standing  as a
                 foreign corporation or partnership, as the case may be,
                 authorized to do business in each jurisdiction in which the
                 nature of its business or its ownership or leasing of property
                 requires such qualification and where failure to be qualified
                 in such manner would, individually or in the aggregate, have a
                 material adverse effect on the condition (financial or
                 otherwise), business, prospects or results of operations of
                 the Company and the Significant Subsidiaries, considered as a
                 whole;

                          (vi)    The issuance and sale of the Securities and
                 the performance by the Company of all of its obligations with
                 respect to the Securities, the Indenture, the Registration
                 Rights Agreement and this Agreement and the consummation of
                 the transactions herein and therein contemplated will not
                 result in a breach or violation of any of the terms or
                 provisions of, or constitute a default by the Company under,
                 any indenture, mortgage, deed of trust, loan agreement or
                 other agreement or instrument known to such counsel to which
                 the Company is a party or to which it or its properties is
                 subject, the Restated Certificate of Incorporation or Amended
                 and Restated Bylaws of the Company, each as amended to date,
                 any statute, rule or regulation or any judgment decree or
                 order of any court or governmental agency or body applicable
                 to the Company or any of its properties;

                          (vii)   The performance of this Agreement, the
                 Indenture and the Registration Rights Agreement and the
                 consummation by the Company of the transactions herein and
                 therein contemplated will not result in a breach or violation
                 by any of the Significant Subsidiaries of any of the terms or
                 provisions of, or constitute a default by any of the
                 Significant Subsidiaries under, any indenture, mortgage, deed
                 of trust, loan agreement or other agreement or instrument
                 known to such counsel to which any of the Significant
                 Subsidiaries is a party or to which any of them or their
                 respective properties is subject, the charter, bylaws or other
                 organizational document, of any of the Significant
                 Subsidiaries, any statute, rule or regulation or any judgment
                 decree or order of any court or governmental agency or body
                 applicable to any of the Significant Subsidiaries or any of
                 their respective properties;





                                      -16-
<PAGE>   17
                          (viii)  To the knowledge of such counsel, neither the
                 Company nor any of the Subsidiaries is in default in the
                 performance or observance of any obligation, covenant or
                 condition contained in any contract, indenture, mortgage, loan
                 agreement, note, lease or other agreement or instrument to
                 which it is a party or by which it or any of its properties
                 may be bound, the effect of which, individually or in the
                 aggregate, would have a material adverse effect on the
                 condition (financial or otherwise), business, prospects or
                 results of operations of the Company and the Subsidiaries,
                 considered as a whole;

                          (ix)    To the knowledge of such counsel, except as
                 described in the Offering Circular, there is not pending or
                 threatened any action, suit, proceeding, inquiry or
                 investigation, to which the Company or any of the Subsidiaries
                 is a party, or to which the property of the Company or any of
                 the Subsidiaries is the subject, before or brought by any
                 court or governmental agency or body, which, individually or
                 in the aggregate is material to the condition (financial or
                 otherwise), business, prospects or results of operations of
                 the Company and the Subsidiaries, considered as a whole. The
                 descriptions in the Offering Circular of statutes, legal and
                 governmental proceeding and contracts and other documents are
                 accurate and fairly present such documents. To the knowledge
                 of such counsel, there are no legal or governmental
                 proceedings required to be described in the Exchange Act
                 Reports that are not described as required, or any contracts
                 or documents of a character required to be described in the
                 Exchange Act Reports or filed as exhibits to and Exchange Act
                 Report that are not described or filed as required; and

                          (x)     The Company and its Significant Subsidiaries
                 have good and marketable title in fee simple to all real
                 property owned by them, in each case free and clear of all
                 liens, encumbrances and defects except such as are described
                 in the Offering Circular or such as do not materially affect
                 the value of such property and do not interfere with the use
                 made and proposed to be made of such property by the Company
                 and its Significant Subsidiaries; and any real property and
                 buildings held under lease by the Company and its Significant
                 Subsidiaries are held by them under valid, subsisting and
                 enforceable leases with such exceptions as are not material
                 and do not interfere with the use made and proposed to be made
                 of such property and buildings by the Company and its
                 Significant Subsidiaries (in giving the opinion in this
                 clause, such counsel may state that no examination of record
                 titles for the purpose of such opinion has been made, and that
                 they are relying upon a general review of the titles of the
                 Company and its Significant Subsidiaries, upon opinions of
                 local counsel and abstracts, reports and policies of title
                 companies rendered or issued at or subsequent to the time of
                 acquisition of such property by the Company or its Significant
                 Subsidiaries, upon opinions of counsel to the lessors of such
                 property and, in respect of matters of fact, upon certificates
                 of officers of the Company or its Significant Subsidiaries,
                 provided that such counsel shall state that they believe that
                 both you and they are justified in relying upon such opinions,
                 abstracts, reports, policies and certificates); and

                          (xi)    The Exchange Act Reports (other than the
                 financial statements and related scheduled therein, as to
                 which such counsel need express no opinion), when they were
                 filed with the Commission, complied as to form in all material
                 respects with the requirements of the Exchange Act, and the
                 rules and regulations of the Commission thereunder.

                          In addition, such counsel shall state that he has
                 participated in conferences with officers and other
                 representatives of the Company, independent public accountants
                 for the Company, and the Purchasers in connection with the
                 preparation of the Offering Circular and has considered the
                 matters required to be stated therein and the statements
                 contained therein, although such counsel has not independently
                 verified the accuracy, completeness or fairness of such
                 statements (except to the extent stated in paragraph (ix)
                 above); and such counsel shall advise you, on the basis of the
                 foregoing (relying as to materiality to a certain extent upon
                 facts provided to such counsel by officers and other
                 representatives of the





                                      -17-
<PAGE>   18
                 Company) that no facts have come to such counsel's attention
                 that have caused such counsel to believe that the Offering
                 Circular (including the documents and information incorporated
                 by reference therein) or any amendment or supplement thereto
                 (other than the financial statements, notes and schedules and
                 other financial data included therein, as to which such
                 counsel need express no belief or comment), as of its date
                 contained, or as of the Time of Delivery contains, any untrue
                 statement of a material fact or as of its date omitted, or as
                 of the Time of Delivery omits, to state a material fact
                 necessary to make the statements therein, in the light of the
                 circumstances under which they were made, not misleading; or
                 the documents and information incorporated by reference in the
                 Offering Circular (other than financial statements, notes and
                 schedules and other financial data included therein, as to
                 which such counsel need express no belief or comment), when
                 they were filed with the Commission contained any untrue
                 statement of a material fact or when they were so filed,
                 omitted to state a material fact required to be stated therein
                 or necessary to make the statements therein, in the light of
                 the circumstances under which they were made, not misleading.

                          In giving such opinion, such counsel may state that
                 insofar as such opinion involves factual matters, he has
                 relied, to the extent he has deemed proper, upon certificates
                 of officers of the Company and certificate of public
                 officials; as to matters involving laws other than the laws of
                 the States of Texas, laws of the United States of American and
                 the General Corporation Law of the state of Delaware, such
                 counsel shall rely upon opinions of counsel, satisfactory to
                 you, licensed to practice in such other jurisdictions. A copy
                 of any opinion upon which such counsel relies shall be
                 attached to the opinion of such counsel and shall be addressed
                 to such counsel or expressly state that such counsel may rely
                 upon it.

                          The opinions of Baker & McKenzie and George B. Brunt
                 described in paragraphs (b) and (c) above shall be rendered to
                 you at the request of the Company and shall so state therein.

                 (d)  Immediately prior to the execution of this Agreement and
         also at such Time of Delivery, the Accountants shall have furnished to
         you a letter or letters, dated the respective date of delivery
         thereof, in form and substance satisfactory to you, to the effect set
         forth in Annex II hereto and as to such other matters as you may
         reasonably request;

                 (e)  (i) Neither the Company nor any of its Subsidiaries shall
         have sustained since the date of the latest audited financial
         statements included in the Offering Circular any loss or interference
         with its business from fire, explosion, flood or other calamity,
         whether or not covered by insurance, or from any labor dispute or
         court or governmental action, order or decree, otherwise than as set
         forth or contemplated in the Offering Circular, and (ii) since the
         respective dates as of which information is given in the Offering
         Circular there shall not have been any change in the capital stock or
         long-term debt of the Company or any of its Subsidiaries or any
         change, or any development involving a prospective change, in or
         affecting the general affairs, management, financial position,
         stockholders' equity or results of operations of the Company and its
         Subsidiaries, otherwise than as set forth or contemplated in the
         Offering Circular, the effect of which, in any such case described in
         Clause (i) or (ii), is in your judgment so material and adverse as to
         make it impracticable or inadvisable to proceed with the public
         offering or the delivery of the Securities on the terms and in manner
         contemplated in this Agreement and in the Offering Circular;

                 (f)  On or after the date hereof (i) no downgrading shall have
         occurred in the rating accorded the Company's debt securities by any
         "nationally recognized statistical rating organization," as that term
         is defined by the Commission for purposes of Rule 436(g)(2) under the
         Act and (ii) no such organization shall have publicly announced that
         it has under surveillance or review, with possible negative
         implications, its rating of any of the Company's debt securities;





                                      -18-
<PAGE>   19
                 (g)  On or after the date hereof there shall not have occurred
         any of the following: (i) a suspension or material limitation in
         trading in securities generally on the New York Stock Exchange or on
         the NASDAQ National Market; (ii) a suspension or material limitation
         in trading in the Company's securities on the NASDAQ National Market;
         (iii) a general moratorium on commercial banking activities in New
         York declared by either Federal or New York State authorities; (iv)
         the outbreak or the escalation of hostilities involving the United
         States or the declaration by the United States, of a national
         emergency or war; or (v) the occurrence of any change in national or
         international financial, political or economic conditions or currency
         exchange rates or controls, if the effect of any event specified in
         clause (iv) or (v) above, in the judgment of Goldman, Sachs & Co.,
         makes it impracticable or inadvisable to proceed with the offering or
         the delivery of the Securities being issued at such Time of Delivery
         on the terms and in the manner contemplated in the Offering Circular;
         and

                 (h)  The Company shall have furnished or caused to be
         furnished to you at such Time of Delivery certificates of officers of
         the Company satisfactory to you as to the accuracy of the
         representations and warranties of the Company herein at and as of such
         Time of Delivery, as to the performance by the Company of all of its
         obligations hereunder to be performed at or prior to such Time of
         Delivery, as to the matters set forth in subsection (e) of this
         Section and as to such other matters as you may reasonably request.

         8.      (a)  The Company will indemnify and hold harmless each
         Purchaser against any losses, claims, damages or liabilities, joint or
         several, to which such Purchaser may become subject, under the Act or
         otherwise, insofar as such losses, claims, damages or liabilities (or
         actions in respect thereof) arise out of or are based upon an untrue
         statement or alleged untrue statement of a material fact contained in
         the Offering Circular, or any amendment or supplement thereto, or
         arise out of or are based upon the omission or alleged omission to
         state therein a material fact necessary to make the statements therein
         not misleading, and will reimburse each Purchaser for any legal or
         other expenses reasonably incurred by such Purchaser in connection
         with investigating or defending any such action or claim as such
         expenses are incurred; provided, however, that the Company shall not
         be liable in any such case to the extent that any such loss, claim,
         damage or liability (or actions in respect thereof) arises out of or
         is based upon an untrue statement or alleged untrue statement or
         omission or alleged omission made in the Offering Circular or any such
         amendment or supplement in reliance upon and in conformity with
         written information furnished to the Company by any Purchaser through
         Goldman, Sachs & Co. expressly for use therein.

                 (b)  Each Purchaser will indemnify and hold harmless the
         Company against any losses, claims, damages or liabilities to which
         the Company may become subject insofar as such losses, claims, damages
         or liabilities (or actions in respect thereof) arise out of or are
         based upon an untrue statement or alleged untrue statement of a
         material fact contained in the Offering Circular, or any amendment or
         supplement thereto, or arise out of or are based upon the omission or
         alleged omission to state therein a material fact necessary to make
         the statements therein not misleading, in each case to the extent, but
         only to the extent, that such untrue statement or alleged untrue
         statement or omission or alleged omission was made in the Offering
         Circular or any such amendment or supplement in reliance upon and in
         conformity with written information furnished to the Company by such
         Purchaser through you expressly for use therein; and will reimburse
         the Company for any legal or other expenses reasonably incurred by the
         Company in connection with investigating or defending any such action
         or claim as such expenses are incurred.

                 (c)  Promptly after receipt by an indemnified party under
         subsection (a) or (b) above of notice of the commencement of any
         action, such indemnified party shall, if a claim in respect thereof is
         to be made against the indemnifying party under such subsection,
         notify the indemnifying party in writing of the commencement thereof;
         but the omission so to notify the indemnifying party shall not relieve
         it from any liability which it may have to any indemnified party
         otherwise than under such subsection. In case any such action shall be
         brought against any indemnified party and it shall notify the





                                      -19-
<PAGE>   20
         indemnifying party of the commencement thereof, the indemnifying party
         shall be entitled to participate therein and, to the extent that it
         shall wish, jointly with any other indemnifying party similarly
         notified, to assume the defense thereof, with counsel satisfactory to
         such indemnified party (who shall not, except with the consent of the
         indemnified party, be counsel to the indemnifying party), and, after
         notice from the indemnifying party to such indemnified party of its
         election so to assume the defense thereof, the indemnifying party
         shall not be liable to such indemnified party under such subsection
         for any legal expenses of other counsel or any other expenses, in each
         case subsequently incurred by such indemnified party, in connection
         with the defense thereof other than reasonable costs of investigation.
         No indemnifying party shall, without the written consent of the
         indemnified party, effect the settlement or compromise of, or consent
         to the entry of any judgment with respect to, any pending or
         threatened action or claim in respect of which indemnification or
         contribution may be sought hereunder (whether or not the indemnified
         party is an actual or potential party to such action or claim) unless
         such settlement, compromise or judgment (i) includes an unconditional
         release of the indemnified party from all liability arising out of
         such action or claim and (ii) does not include a statement as to, or
         an admission of, fault, culpability or a failure to act, by or on
         behalf of any indemnified party.

                 (d)  If the indemnification provided for in this Section 8 is
         unavailable to or insufficient to hold harmless an indemnified party
         under subsection (a) or (b) above in respect of any losses, claims,
         damages or liabilities (or actions in respect thereof) referred to
         therein, then each indemnifying party shall contribute to the amount
         paid or payable by such indemnified party as a result of such losses,
         claims, damages or liabilities (or actions in respect thereof) in such
         proportion as is appropriate to reflect the relative benefits received
         by the Company on the one hand and the Purchasers on the other from
         the offering of the Securities. If, however, the allocation provided
         by the immediately preceding sentence is not permitted by applicable
         law or if the indemnified party failed to give the notice required
         under subsection (c) above, then each indemnifying party shall
         contribute to such amount paid or payable by such indemnified party in
         such proportion as is appropriate to reflect not only such relative
         benefits but also the relative fault of the Company on the one hand
         and the Purchasers on the other in connection with the statements or
         omissions which resulted in such losses, claims, damages or
         liabilities (or actions in respect thereof), as well as any other
         relevant equitable considerations. The relative benefits received by
         the Company on the one hand and the Purchasers on the other shall be
         deemed to be in the same proportion as the total net proceeds from the
         offering (before deducting expenses) received by the Company bear to
         the total underwriting discounts and commissions received by the
         Purchasers, in each case as set forth in the Offering Circular. The
         relative fault shall be determined by reference to, among other
         things, whether the untrue or alleged untrue statement of a material
         fact or the omission or alleged omission to state a material fact
         relates to information supplied by the Company on the one hand or the
         Purchasers on the other and the parties' relative intent, knowledge,
         access to information and opportunity to correct or prevent such
         statement or omission. The Company and the Purchasers agree that it
         would not be just and equitable if contribution pursuant to this
         subsection (d) were determined by pro rata allocation (even if the
         Purchasers were treated as one entity for such purpose) or by any
         other method of allocation which does not take account of the
         equitable considerations referred to above in this subsection (d). The
         amount paid or payable by an indemnified party as a result of the
         losses, claims, damages or liabilities (or actions in respect thereof)
         referred to above in this subsection (d) shall be deemed to include
         any legal or other expenses reasonably incurred by such indemnified
         party in connection with investigating or defending any such action or
         claim. Notwithstanding the provisions of this subsection (d), no
         Purchaser shall be required to contribute any amount in excess of the
         amount by which the total price at which the Securities underwritten
         by it and distributed to investors were offered to investors exceeds
         the amount of any damages which such Purchaser has otherwise been
         required to pay by reason of such untrue or alleged untrue statement
         or omission or alleged omission. The Purchasers' obligations in this
         subsection (d) to contribute are several in proportion to their
         respective underwriting obligations and not joint.





                                      -20-
<PAGE>   21
                 (e)  The obligations of the Company under this Section 8 shall
         be in addition to any liability which the Company may otherwise have
         and shall extend, upon the same terms and conditions, to each person,
         if any, who controls any Purchaser within the meaning of the Act; and
         the obligations of the Purchasers under this Section 8 shall be in
         addition to any liability which the respective Purchasers may
         otherwise have and shall extend, upon the same terms and conditions,
         to each officer and director of the Company and to each person, if
         any, who controls the Company within the meaning of the Act.

         9.      (a)   If any Purchaser shall default in its obligation to
         purchase the Securities which it has agreed to purchase hereunder, you
         may in your discretion arrange for you or another party or other
         parties to purchase such Securities on the terms contained herein. If
         within thirty-six hours after such default by any Purchaser you do not
         arrange for the purchase of such Securities, then the Company shall be
         entitled to a further period of thirty-six hours within which to
         procure another party or other parties satisfactory to you to purchase
         such Securities on such terms. In the event that, within the
         respective prescribed periods, you notify the Company that you have so
         arranged for the purchase of such Securities, or the Company notifies
         you that it has so arranged for the purchase of such Securities, you
         or the Company shall have the right to postpone the Time of Delivery
         for a period of not more than seven days, in order to effect whatever
         changes may thereby be made necessary in the Offering Circular, or in
         any other documents or arrangements, and the Company agrees to prepare
         promptly any amendments to the Offering Circular which in your opinion
         may thereby be made necessary.  The term "Purchaser" as used in this
         Agreement shall include any person substituted under this Section with
         like effect as if such person had originally been a party to this
         Agreement with respect to such Securities.

                 (b)  If, after giving effect to any arrangements for the
         purchase of the Securities of a defaulting Purchaser or Purchasers by
         you and the Company as provided in subsection (a) above, the aggregate
         principal amount of such Securities which remains unpurchased does not
         exceed one-eleventh of the aggregate principal amount of all the
         Securities, then the Company shall have the right to require each
         non-defaulting Purchaser to purchase the principal amount of
         Securities which such Purchaser agreed to purchase hereunder and, in
         addition, to require each non-defaulting Purchaser to purchase its pro
         rata share (based on the principal amount of Securities which such
         Purchaser agreed to purchase hereunder) of the Securities of such
         defaulting Purchaser or Purchasers for which such arrangements have
         not been made; but nothing herein shall relieve a defaulting Purchaser
         from liability for its default.

                 (c)  If, after giving effect to any arrangements for the
         purchase of the Securities of a defaulting Purchaser or Purchasers by
         you and the Company as provided in subsection (a) above, the aggregate
         principal amount of Securities which remains unpurchased exceeds
         one-eleventh of the aggregate principal amount of all the Securities,
         or if the Company shall not exercise the right described in subsection
         (b) above to require non-defaulting Purchasers to purchase the
         Securities of a defaulting Purchaser or Purchasers, then this
         Agreement (or with respect to the Second Time of Delivery, the
         obligation of the Purchasers to purchase and the Company to sell the
         Optional Securities) shall thereupon terminate, without liability on
         the part of any non-defaulting Purchaser or the Company, except for
         the expenses to be borne by the Company and the Purchasers as provided
         in Section 6 hereof and the indemnity and contribution agreements in
         Section 8 hereof; but nothing herein shall relieve a defaulting
         Purchaser from liability for its default.

         10.  The respective indemnities, agreements, representations,
warranties and other statements of the Company and the several Purchasers, as
set forth in this Agreement or made by or on behalf of them, respectively,
pursuant to this Agreement, shall remain in full force and effect, regardless
of any investigation (or any statement as to the results thereof) made by or on
behalf of any Purchaser or any controlling person of any Purchaser, or the
Company, or any officer or director or controlling person of the Company, and
shall survive delivery of and payment for the Securities.





                                      -21-
<PAGE>   22
         11.  If this Agreement shall be terminated pursuant to Section 9
hereof, the Company shall not then be under any liability to any Purchaser,
except as provided in Sections 6 and 8 hereof; but, if for any other reason,
the Securities are not delivered by or on behalf of the Company as provided
herein, the Company will reimburse the Purchasers through you for all
out-of-pocket expenses approved in writing by you, including fees,
disbursements and expenses of counsel, reasonably incurred by the Purchasers in
making preparations for the purchase, sale and delivery of the Securities, but
the Company shall then be under no further liability to any Purchaser except as
provided in Sections 6 and 8 hereof.

         12.  In all dealings hereunder, you shall act on behalf of each of the
Purchasers, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Purchaser made or
given by you jointly or by Goldman, Sachs & Co. on your behalf.

         All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Purchasers shall be delivered or sent by mail, telex or
facsimile transmission to you in care of Goldman, Sachs & Co., 85 Broad Street,
New York, New York 10004, Attention: Registration Department; and if to the
Company shall be delivered or sent by mail, telex or facsimile transmission to
the address of the Company set forth in the Offering Circular, Attention:
Secretary.  Any such statements, requests, notices or agreements shall take
effect upon receipt thereof.

         13.  This Agreement shall be binding upon, and inure solely to the
benefit of, the Purchasers, the Company and, to the extent provided in Sections
8 and 10 hereof, the officers and directors of the Company and each person who
controls the Company or any Purchaser, and their respective heirs, executors,
administrators, successors and assigns, and no other person shall acquire or
have any right under or by virtue of this Agreement. No purchaser of any of the
Securities from any Purchaser shall be deemed a successor or assign by reason
merely of such purchase.

         14.  Time shall be of the essence of this Agreement.

         15.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK.

         16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.





                                      -22-
<PAGE>   23
         If the foregoing is in accordance with your understanding, please sign
and return to us five counterparts hereof, and upon the acceptance hereof by
you, this letter and such acceptance hereof shall constitute a binding
agreement between each of the Purchasers and the Company.  It is understood
that your acceptance of this letter on behalf of each of the Purchasers is
pursuant to the authority set forth in a form of Agreement among Purchasers,
the form of which shall be submitted to the Company for examination upon
request, but without warranty on your part as to the authority of the signers
thereof.

                                       Very truly yours,

                                       DSC Communications Corporation



                                       By: /s/ Gerald F. Montry                
                                           ------------------------------------
                                           Name:    Gerald F. Montry
                                           Title:   Senior Vice President and
                                                    Chief Financial Officer
Accepted as of the date hereof:

Goldman, Sachs & Co.
NationsBanc Capital Markets, Inc.
By:  Goldman, Sachs & Co.



     /s/ Goldman, Sachs & Co. 
- ----------------------------------
     (Goldman, Sachs & Co.)





                                      -23-
<PAGE>   24
                                   SCHEDULE I


<TABLE>
<CAPTION>
                                                                                 Aggregate Principal Amount
                                                         Principal Amount of    of Optional Securities to be
                                                          Firm Securities to    Purchased if Maximum Option
                       Purchaser                             be Purchased                Exercised
                       ---------                             ------------                ---------
 <S>                                                           <C>                      <C>
 Goldman, Sachs & Co.  . . . . . . . . . . . . . . . .         $270,000,000             $ 90,000,000

 NationsBanc Capital Markets, Inc. . . . . . . . . . .           30,000,000               10,000,000
                                                             --------------            -------------


      TOTAL  . . . . . . . . . . . . . . . . . . . . .         $300,000,000             $100,000,000
                                                               ============             ============
</TABLE>





                                      -24-
<PAGE>   25
                                  SCHEDULE II

                                  SUBSIDIARIES


                 Name
                 ----

DSC Finance Corporation (Delaware)
DSC Finance (Pty) Ltd. (Australia)
DSC Communications Ltd. (United Kingdom)
DSC Local Network (Europe) Ltd. (United Kingdom) (Inactive)
DSC Communications Technics Ltd. (U.K.) (Inactive)
DSC Communications Canada, Inc. (Ontario)
DSC of Virginia Island (US Virgin Island) (Inactive)
DSC Communications Ireland Holdings, Ltd. (Barbados)
DSC Communications Ireland (Ireland)
DSC Communications (Nederland) B.V. (formerly Sildor Investments B.V.)
DSC Communications A/S (Denmark)
Netman A/S Denmark
DSC Communications TMN A/S (Denmark)
TMN Udviklling I/S
Fibcom India Ltd. Joint Venture (India)
DSC Communications Polska SP Z.O.O. (Poland)
DSC Communications France S.A.
DSC Communications (India) Private, Ltd.
DSC Marketing Services, Inc. (Delaware)
DSC Japan Inc. (Japan)
DSC Telecom, Inc. (Nevada)
DSC Telecommunications Corporation (Delaware)
DSC Telecom L.P. (Texas)
DSC of Puerto Rico, Inc. (Delaware)
DSC Global Export Ltd. (Barbados)
DSC Communications (Pty) Ltd. (Australia)
DSC International Corporation (Delaware)
DSC Communications (Far East) Ltd. (Hong Kong)
DSC Kommunikationsdienste GmbH (Germany)
DSC Communications (Cayman Islands) Ltd.
DSC Comunicacoes Ltda. (Brazil)
DSC Comunicaciones de S.A. de C.V. (Mexico)
DSC Comunicaciones de Costa Rica S.A.
DSC Communications (Asia-Pacific) Pte Ltd. (Singapore)
DSC Taiwan Inc. (Delaware)
DSC Korea, Inc. (Delaware) (Inactive)
DSC Communications Italia S.r.l.





                                      -25-
<PAGE>   26
                                  SCHEDULE III


James F. Donald
Gerald F. Montry
Raymond J. Dempsey
Sir John Fairclough
James L. Fisher
Robert S. Folsom
William O. Hunt
Morton L. Topfer





                                      -26-
<PAGE>   27
                                                                         ANNEX I



         (1)     The Securities and the Stock issuable upon the conversion
thereof have not been and will not be registered under the Act and may not be
offered or sold within the United States or to, or for the account or benefit
of, U.S. persons except in accordance with Regulation S under the Act or
pursuant to an exemption from the registration requirements of the Act. Each
Purchaser represents that it has offered and sold, and will offer and sell, the
Securities and the Stock issuable upon the conversion thereof (i) as part of
its distribution at any time and (ii) otherwise until 40 days after the later
of the commencement of the offering and the closing date, only in accordance
with Rule 903 of Regulation S, Rule 144A or another exemption from registration
under the Act. Accordingly, each Purchaser agrees that neither it, its
affiliates nor any persons acting on its or their behalf have engaged or will
engage in any directed selling efforts with respect to the Securities or the
Stock issuable upon conversion thereof, and, in the case of sales pursuant to
Rule 903, it and they have complied and will comply with the offering
restrictions requirement of Regulation S. Each Purchaser agrees that, at or
prior to confirmation of sale of Securities being made pursuant to Rule 903, it
will have sent to each distributor, dealer or person receiving a selling
concession, fee or other remuneration that purchases Securities or the Stock
issuable upon conversion thereof from it during the restricted period a
confirmation or notice to substantially the following effect:

                 "The Securities covered hereby and the Stock issuable upon
         conversion thereof have not been registered under the U.S. Act of 1933
         (the "Act") and may not be offered and sold within the United States
         or to, or for the account or benefit of, U.S. persons (i) as part of
         their distribution at any time or (ii) otherwise until 40 days after
         the later of the commencement of the offering and the closing date,
         except in either case in accordance with Regulation S (or Rule 144A if
         available) under the Act. Terms used above have the meaning given to
         them by Regulation S."

Terms used in this paragraph have the meanings given to them by Regulation S.

         Each Purchaser further agrees that it has not entered and will not
enter into any contractual arrangement with respect to the distribution or
delivery of the Securities, except with its affiliates or with the prior
written consent of the Company and Goldman, Sachs & Co.

         (2)  Notwithstanding the foregoing, Securities in registered form may
be offered, sold and delivered by the Purchasers in the United States and to
U.S. persons without delivery of the written statement required by paragraph
(1) above.

         (3)  Each Purchaser further represents and agrees that (i) it has not
offered or sold and prior to the date six months after the date of issue of the
Securities will not offer or sell any Securities to persons in the United
Kingdom except to persons whose ordinary activities involve them in acquiring,
holding, managing or disposing of investments (as principal or agent) for the
purposes of their businesses or otherwise in circumstances which have not
resulted and will not result in an offer to the public in the United Kingdom
within the meaning of the Public Offers of Securities Regulations 1995, (b) it
has complied, and will comply, with all applicable provisions of the Financial
Services Act of 1986 of Great Britain with respect to anything done by it in
relation to the Securities in, from or otherwise involving the United Kingdom,
and (c) it has only issued or passed on and will only issue or pass on in the
United Kingdom any document received by it in connection with the issuance of
the Securities to a person who is of a kind described in Article 11(3) of the
Financial Services Act 1986 (Investment Advertisements) (Exemptions) Order 1996
of Great Britain or is a person to whom the document may otherwise lawfully be
issued or passed on.

         (4)  Each Purchaser agrees that it will not offer, sell or deliver any
of the Securities or the Stock issuable upon the conversion thereof in any
jurisdiction outside of the United States except under circumstances that will
result in compliance with the applicable laws thereof, and that it will take at
its own expense whatever action is required to permit its purchase and resale
of the Securities or the Stock issuable upon the conversion thereof in such
jurisdictions. Each Purchaser understands that no action has been taken to
permit a public offering in any jurisdiction outside of the United States where
action would be required for such purpose. Each Purchaser agrees not to cause
any advertisement of the Securities to be published in any newspaper or
periodical or posted in any public place and not to issue any circular relating
to the Securities, except in any such case with Goldman, Sachs & Co.'s express
written consent and then only at its own risk and expense.





                                      -1-
<PAGE>   28
                                                                        ANNEX II



         Pursuant to Section 7(d) of the Agreement, the Accountants shall
furnish letters to the Purchasers to the effect that:

                 (i)  They are independent certified public accountants with
         respect to the Company and its subsidiaries under Rule 101 of the
         AICPA's Code of Professional Conduct, and its interpretations and
         rulings;

                 (ii)  In their opinion, the consolidated financial statements
         and related financial statement schedules audited by them and included
         in the Offering Circular comply as to form in all material respects
         with the applicable requirements of the Securities Exchange Act of
         1934 (the "Exchange Act") and the related published rules and
         regulations;

                 (iii)  The Unaudited Selected Consolidated Financial
         Information with respect to the consolidated results of operations and
         financial position of the Company for the three most recent fiscal
         years included in the Offering Circular agrees with the corresponding
         amounts (after restatements where applicable) in the audited
         consolidated financial statements for such three fiscal years;

                 (iv)  On the basis of limited procedures not constituting an
         audit in accordance with generally accepted auditing standards,
         consisting of a reading of the unaudited financial statements and
         other information referred to below, a reading of the latest available
         interim financial statements of the Company and its subsidiaries,
         inspection of the minute books of the Company and its subsidiaries
         since the date of the latest audited financial statements included in
         the Offering Circular, inquiries of officials of the Company and its
         subsidiaries responsible for financial and accounting matters and such
         other inquiries and procedures as may be specified in such letter,
         nothing came to their attention that caused them to believe that:

                          (A)  the unaudited condensed consolidated statements
                 of income, consolidated balance sheets and consolidated
                 statements of cash flows included in the Offering Circular are
                 not in conformity with generally accepted accounting
                 principles applied on the basis substantially consistent with
                 the basis for the audited condensed consolidated statements of
                 income, consolidated balance sheets and consolidated
                 statements of cash flows included in the Offering Circular;

                          (B)  any other unaudited income statement data and
                 balance sheet items included in the Offering Circular do not
                 agree with the corresponding items in the unaudited
                 consolidated financial statements from which such data and
                 items were derived, and any such unaudited data and items were
                 not determined on a basis substantially consistent with the
                 basis for the corresponding amounts in the audited
                 consolidated financial statements included in the Offering
                 Circular;

                          (C)  the unaudited financial statements which were
                 not included in the Offering Circular but from which were
                 derived any unaudited condensed financial statements referred
                 to in Clause (A) and any unaudited income statement data and
                 balance sheet items included in the Offering Circular and
                 referred to in Clause (B) were not determined on a basis
                 substantially consistent with the basis for the audited
                 consolidated financial statements included in the Offering
                 Circular;

                          (D)  as of a specified date not more than five days
                 prior to the date of such letter, there have been any changes
                 in the consolidated capital stock (other than exercise of
                 options, issuance of common stock under employee stock
                 purchase plans and vesting of restricted stock, in each case
                 which were outstanding on the date of the latest financial
                 statements included in the Offering Circular) or any increase
                 in the consolidated long-term debt of the Company and its
                 subsidiaries, in each case as compared with amounts shown in
                 the latest balance sheet included in the Offering Circular
                 except in each case for changes





                                      -1-
<PAGE>   29
                 or increases which the Offering Circular discloses have
                 occurred or may occur or which are described in such letter;
                 and

                 (v)  In addition to the examination referred to in their
         report(s) included in the Offering Circular and the limited
         procedures, inspection of minute books, inquiries and other procedures
         referred to in paragraphs (iii) and (iv) above, they have carried out
         certain specified procedures, not constituting an audit in accordance
         with generally accepted auditing standards, with respect to certain
         amounts, percentages and financial information specified by the
         Purchasers, which are derived from the general accounting records of
         the Company and its subsidiaries, which appear in the Offering
         Circular, and have compared certain of such amounts, percentages and
         financial information with the accounting records of the Company and
         its subsidiaries and have found them to be in agreement.





                                      -2-
<PAGE>   30
                                                                       EXHIBIT A



                     FORM OF REGISTRATION RIGHTS AGREEMENT





                                      -1-
<PAGE>   31
                                                                       EXHIBIT B


                           FORM OF LOCK-UP AGREEMENT





                                      -1-

<PAGE>   1
                                                                     EXHIBIT 4.1

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


                         DSC COMMUNICATIONS CORPORATION

                                     ISSUER

                                       TO

                              THE BANK OF NEW YORK

                                    TRUSTEE


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


                                   INDENTURE

                          Dated as of August 12, 1997


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

                                U.S.$400,000,000


                       7% CONVERTIBLE SUBORDINATED NOTES
                               DUE August 1, 2004


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



<PAGE>   2

                               TABLE OF CONTENTS
                                  -----------

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

                                  ARTICLE ONE

         DEFINITIONS AND OTHER PROVISIONS
         OF GENERAL APPLICATION...................................................................................2
            SECTION 1.1.      Definitions.........................................................................2
                  Act      .......................................................................................2
                  Affiliate.......................................................................................2
                  Agent Member....................................................................................2
                  Applicable Procedures...........................................................................2
                  Authenticating Agent............................................................................3
                  Authorized Newspaper............................................................................3
                  Board of Directors..............................................................................3
                  Board Resolution................................................................................3
                  Business Day....................................................................................3
                  CEDEL    .......................................................................................3
                  Change in Control...............................................................................3
                  Closing Price Per Share.........................................................................3
                  Code     .......................................................................................3
                  Commission......................................................................................4
                  Common Stock....................................................................................4
                  Common stock....................................................................................4
                  Company  .......................................................................................4
                  Company Notice..................................................................................4
                  Company Request or Company Order................................................................4
                  Constituent Person..............................................................................4
                  Conversion Agent................................................................................4
                  Conversion Price................................................................................4
                  Conversion Rate.................................................................................5
                  Corporate Trust Office..........................................................................5
                  corporation.....................................................................................5
</TABLE>


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

                                      -i-

<PAGE>   3



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
                  <S>                                                                                             <C>
                  Defaulted Interest..............................................................................5
                  Depositary......................................................................................5
                  Dollar or U.S.$.................................................................................5
                  DTC      .......................................................................................5
                  Euroclear.......................................................................................5
                  Event of Default................................................................................5
                  Exchange Act....................................................................................5
                  Exchange Date...................................................................................5
                  Global Security.................................................................................5
                  Holder   .......................................................................................5
                  Indenture.......................................................................................5
                  Initial Purchasers..............................................................................6
                  Interest Payment Date...........................................................................6
                  Liquidated Damages..............................................................................6
                  Maturity .......................................................................................6
                  Non-electing Share..............................................................................6
                  Notice of Default...............................................................................6
                  Officers' Certificate...........................................................................6
                  Opinion of Counsel..............................................................................6
                  Outstanding.....................................................................................6
                  Paying Agent....................................................................................7
                  Person   .......................................................................................7
                  Place of Conversion.............................................................................7
                  Place of Payment................................................................................7
                  Predecessor Security............................................................................7
                  Purchase Agreement..............................................................................8
                  Record Date.....................................................................................8
                  Record Date Period..............................................................................8
                  Redemption Date.................................................................................8
                  Redemption Price................................................................................8
                  Registered Security.............................................................................8
                  Registrable Securities..........................................................................8
                  Regular Record Date.............................................................................8
                  Regulation S....................................................................................8
                  Regulation S Certificate........................................................................8
                  Regulation S Global Security....................................................................8
</TABLE>


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

                                      -ii-

<PAGE>   4



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
               <S>                                                                                                <C>
                  Regulation S Legend.............................................................................8
                  Regulation S Securities.........................................................................9
                  Repurchase Date.................................................................................9
                  Repurchase Price................................................................................9
                  Responsible Officer.............................................................................9
                  Restricted Global Security......................................................................9
                  Restricted Period...............................................................................9
                  Restricted Securities...........................................................................9
                  Restricted Securities Certificate...............................................................9
                  Restricted Securities Legend....................................................................9
                  Rule 144A.......................................................................................9
                  Rule 144A Information...........................................................................9
                  Rule 144A Securities............................................................................9
                  Securities.....................................................................................10
                  Securities Act.................................................................................10
                  Securities Act Legend..........................................................................10
                  Security Register and Security Registrar.......................................................10
                  Senior Indebtedness............................................................................10
                  Shelf Registration Statement...................................................................11
                  Special Record Date............................................................................11
                  Stated Maturity................................................................................11
                  Subsidiary.....................................................................................11
                  Successor Security.............................................................................11
                  Surrender Certificate..........................................................................11
                  Trading Days...................................................................................11
                  Trust Indenture Act............................................................................11
                  Trustee  ......................................................................................12
                  United States..................................................................................12
                  Unrestricted Securities Certificate............................................................12
                  Vice President.................................................................................12
         SECTION 1.2.      Compliance Certificates and Opinions..................................................12
         SECTION 1.3.      Form of Documents Delivered to the Trustee............................................13
         SECTION 1.4.      Acts of Holders of Securities.........................................................13
         SECTION 1.5.      Notices, Etc., to Trustee and Company.................................................15
         SECTION 1.6.      Notice to Holders of Securities; Waiver...............................................16
         SECTION 1.7.      Effect of Headings and Table of Contents..............................................17
</TABLE>


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

                                     -iii-

<PAGE>   5



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
         <S>               <C>                                                                                   <C>
         SECTION 1.8.      Successors and Assigns................................................................17
         SECTION 1.9.      Separability Clause...................................................................17
         SECTION 1.10.     Benefits of Indenture.................................................................17
         SECTION 1.11.     Governing Law.........................................................................17
         SECTION 1.12.     Legal Holidays........................................................................17
         SECTION 1.13.     Conflict with Trust Indenture Act.....................................................18

                                  ARTICLE TWO

         SECURITY FORMS..........................................................................................19
         SECTION 2.1.      Form Generally........................................................................19
         SECTION 2.2.      Form .................................................................................20
         SECTION 2.3.      Form of Certificate of Authentication.................................................36
         SECTION 2.4.      Form of Conversion Notice.............................................................36

                                 ARTICLE THREE

         THE SECURITIES..........................................................................................38
         SECTION 3.1.      Title and Terms.......................................................................38
         SECTION 3.2.      Denominations.........................................................................39
         SECTION 3.3.      Execution, Authentication, Delivery and Dating........................................39
         SECTION 3.4.      Global Securities.....................................................................39
         SECTION 3.5.      Registration, Registration of Transfer and Exchange;
                                     Restrictions on Transfer....................................................41
         SECTION 3.6.      Mutilated, Destroyed, Lost or Stolen Securities.......................................45
         SECTION 3.7.      Payment of Interest; Interest Rights Preserved........................................46
         SECTION 3.8.      Persons Deemed Owners.................................................................47
         SECTION 3.9.      Cancellation..........................................................................48
         SECTION 3.10.     Computation of Interest...............................................................48
         SECTION 3.11.     [Reserved.............................................................................48
         SECTION 3.12.     CUSIP Numbers.........................................................................48

                                  ARTICLE FOUR

         SATISFACTION AND DISCHARGE..............................................................................49
         SECTION 4.1.      Satisfaction and Discharge of Indenture...............................................49
</TABLE>


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

                                      -iv-

<PAGE>   6



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
         <S>              <C>                                                                                    <C>
         SECTION 4.2.      Application of Trust Money............................................................50

                                  ARTICLE FIVE

         REMEDIES................................................................................................51
         SECTION 5.1.      Events of Default.....................................................................51
         SECTION 5.2.      Acceleration of Maturity; Rescission and Annulment....................................52
         SECTION 5.3.      Collection of Indebtedness and Suits for
                                    Enforcement by Trustee.......................................................53
         SECTION 5.4.      Trustee May File Proofs of Claim......................................................54
         SECTION 5.5.      Trustee May Enforce Claims Without Possession
                                of Securities....................................................................55
         SECTION 5.6.      Application of Money Collected........................................................55
         SECTION 5.7.      Limitation on Suits...................................................................56
         SECTION 5.8.      Unconditional Right of Holders to Receive Principal,
                                    Premium and Interest and to Convert..........................................56
         SECTION 5.9.      Restoration of Rights and Remedies....................................................57
         SECTION 5.10.     Rights and Remedies Cumulative........................................................57
         SECTION 5.11.     Delay or Omission Not Waiver..........................................................57
         SECTION 5.12.     Control by Holders of Securities......................................................57
         SECTION 5.13.     Waiver of Past Defaults...............................................................58
         SECTION 5.14.     Undertaking for Costs.................................................................58
         SECTION 5.15.     Waiver of Stay, Usury or Extension Laws...............................................58

                                  ARTICLE SIX

         THE TRUSTEE.............................................................................................60
         SECTION 6.1.      Certain Duties and Responsibilities...................................................60
         SECTION 6.2.      Notice of Defaults....................................................................61
         SECTION 6.3.      Certain Rights of Trustee.............................................................61
         SECTION 6.4.      Not Responsible for Recitals or Issuance of Securities................................63
         SECTION 6.5.      May Hold Securities, Act as Trustee Under Other Indentures............................63
         SECTION 6.6.      Money Held in Trust...................................................................63
         SECTION 6.7.      Compensation and Reimbursement........................................................63
         SECTION 6.8.      Corporate Trustee Required; Eligibility...............................................64
         SECTION 6.9.      Resignation and Removal; Appointment of Successor.....................................64
</TABLE>


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

                                      -v-

<PAGE>   7



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
         <S>              <C>                                                                                    <C>
         SECTION 6.10.     Acceptance of Appointment by Successor................................................66
         SECTION 6.11.     Merger, Conversion, Consolidation or Succession to Business...........................66
         SECTION 6.12.     Authenticating Agents.................................................................66
         SECTION 6.13.     Disqualification; Conflicting Interests...............................................68
         SECTION 6.14.     Preferential Collection of Claims Against Company.....................................68

                                 ARTICLE SEVEN

         CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE....................................................69
         SECTION 7.1.      Company May Consolidate, Etc., Only on Certain Terms..................................69
         SECTION 7.2.      Successor Substituted.................................................................69

                                 ARTICLE EIGHT

         SUPPLEMENTAL INDENTURES.................................................................................71
         SECTION 8.1.      Supplemental Indentures Without Consent of Holders
                                    of Securities................................................................71
         SECTION 8.2.      Supplemental Indentures with Consent of Holders
                                    of Securities................................................................72
         SECTION 8.3.      Execution of Supplemental Indentures..................................................73
         SECTION 8.4.      Effect of Supplemental Indentures.....................................................73
         SECTION 8.5.      Reference in Securities to Supplemental Indentures....................................74
         SECTION 8.6.      Notice of Supplemental Indentures.....................................................74

                                  ARTICLE NINE

         MEETINGS OF HOLDERS OF SECURITIES.......................................................................75
         SECTION 9.1.      Purposes for Which Meetings May Be Called.............................................75
         SECTION 9.2.      Call, Notice and Place of Meetings....................................................75
         SECTION 9.3.      Persons Entitled to Vote at Meetings..................................................75
         SECTION 9.4.      Quorum; Action........................................................................76
         SECTION 9.5.      Determination of Voting Rights; Conduct and
                                    Adjournment of Meetings......................................................76
         SECTION 9.6.      Counting Votes and Recording Action of Meetings.......................................77
</TABLE>



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


                                      -vi-

<PAGE>   8



<TABLE>
<CAPTION>
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                                                                                                                ----
<S>                                                                                                             <C>
                                  ARTICLE TEN

         COVENANTS...............................................................................................78
         SECTION 10.1.     Payment of Principal, Premium and Interest............................................78
         SECTION 10.2.     Maintenance of Offices or Agencies....................................................78
         SECTION 10.3.     Money for Security Payments To Be Held in Trust.......................................79
         SECTION 10.4.     [Reserved.............................................................................80
         SECTION 10.5.     Existence.............................................................................80
         SECTION 10.6.     Maintenance of Properties.............................................................80
         SECTION 10.7.     Payment of Taxes and Other Claims.....................................................80
         SECTION 10.8.     Registration and Listing..............................................................81
         SECTION 10.9.     Statement by Officers as to Default...................................................81
         SECTION 10.10.    Delivery of Certain Information.......................................................82
         SECTION 10.11.    Resale of Certain Securities; Reporting Issuer........................................82
         SECTION 10.12.    Registration Rights...................................................................82
         SECTION 10.13.    Waiver of Certain Covenants...........................................................84

                                 ARTICLE ELEVEN

         REDEMPTION OF SECURITIES................................................................................85
         SECTION 11.1.     Right of Redemption...................................................................85
         SECTION 11.2.     Applicability of Article..............................................................85
         SECTION 11.3.     Election to Redeem; Notice to Trustee.................................................85
         SECTION 11.4.     Selection by Trustee of Securities To Be Redeemed.....................................85
         SECTION 11.5.     Notice of Redemption..................................................................86
         SECTION 11.6.     Deposit of Redemption Price...........................................................87
         SECTION 11.7.     Securities Payable on Redemption Date.................................................87
         SECTION 11.8.     Securities Redeemed in Part...........................................................88

                                 ARTICLE TWELVE

         CONVERSION OF SECURITIES................................................................................89
         SECTION 12.1.     Conversion Privilege and Conversion Price.............................................89
         SECTION 12.2.     Exercise of Conversion Privilege......................................................89
         SECTION 12.3.     Fractions of Shares...................................................................91
         SECTION 12.4.     Adjustment of Conversion Price........................................................91
</TABLE>


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

                                     -vii-

<PAGE>   9



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
         <S>              <C>                                                                                    <C>
         SECTION 12.5.     Notice of Adjustments of Conversion Price.............................................96
         SECTION 12.6.     Notice of Certain Corporate Action....................................................96
         SECTION 12.7.     Company to Reserve Common Stock.......................................................97
         SECTION 12.8.     Taxes on Conversions..................................................................98
         SECTION 12.9.     Covenant as to Common Stock...........................................................98
         SECTION 12.10.    Cancellation of Converted Securities..................................................98
         SECTION 12.11.    Provision in Case of Consolidation, Merger or Sale of Assets..........................98
         SECTION 12.12.    Responsibility of Trustee for Conversion Provisions...................................99

                                ARTICLE THIRTEEN

         SUBORDINATION OF SECURITIES............................................................................101
         SECTION 13.1.     Securities Subordinate to Senior Indebtedness........................................101
         SECTION 13.2.     Payment Over of Proceeds Upon Dissolution, Etc.......................................101
         SECTION 13.3.     No Payment When Senior Indebtedness in Default.......................................102
         SECTION 13.4.     Payment Permitted If No Default......................................................103
         SECTION 13.5.     Subrogation to Rights of Holders of Senior Indebtedness..............................103
         SECTION 13.6.     Provisions Solely to Define Relative Rights..........................................103
         SECTION 13.7.     Trustee to Effectuate Subordination..................................................104
         SECTION 13.8.     No Waiver of Subordination Provisions................................................104
         SECTION 13.9.     Notice to Trustee....................................................................104
         SECTION 13.10.    Reliance on Judicial Order or Certificate of Liquidating Agent.......................105
         SECTION 13.11.    Trustee Not Fiduciary for Holders of Senior Indebtedness.............................106
         SECTION 13.12.    Reliance by Holders of Senior Indebtedness on
                               Subordination Provisions.........................................................106
         SECTION 13.13.    Rights of Trustee as Holder of Senior Indebtedness;
                               Preservation of Trustee's Rights.................................................106
         SECTION 13.14.    Article Applicable to Paying Agents..................................................106
         SECTION 13.15.    Certain Conversions and Repurchases Deemed Payment...................................107

                                ARTICLE FOURTEEN

         REPURCHASE OF SECURITIES AT THE OPTION OF THE
         HOLDER UPON A CHANGE IN CONTROL........................................................................108
         SECTION 14.1.     Right to Require Repurchase..........................................................108
</TABLE>



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

                                     -viii-

<PAGE>   10



<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
         <S>               <C>                                                                                  <C>
         SECTION 14.2.     Conditions to the Company's Election to Pay the
                                    Repurchase Price in Common Stock............................................109
         SECTION 14.3.     Notices; Method of Exercising Repurchase Right, Etc..................................109
         SECTION 14.4.     Certain Definitions..................................................................113

                                ARTICLE FIFTEEN

         HOLDERS LISTS AND REPORTS BY TRUSTEE AND COMPANY; NON-RECOURSE.........................................115
         SECTION 15.1.     Company to Furnish Trustee Names and Addresses of Holders............................115
         SECTION 15.2.     Preservation of Information..........................................................115
         SECTION 15.3.     No Recourse Against Others...........................................................115
         SECTION 15.4.     Reports by Trustee...................................................................116
         SECTION 15.5.     Reports by Company...................................................................116

TESTIMONIUM.................................................................................................... 149

SIGNATURES AND SEALS........................................................................................... 149

ACKNOWLEDGMENTS................................................................................................ 150


ANNEX A.......................................................................................................  A-1
ANNEX B.......................................................................................................  B-1
ANNEX C.......................................................................................................  C-1
ANNEX D.......................................................................................................  D-1
</TABLE>



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

                                      -ix-

<PAGE>   11


         This INDENTURE is dated as of August 12, 1997, between DSC
Communications Corporation, a corporation duly organized and existing under the
laws of the State of Delaware, having its principal office at 1000 Coit Road,
Plano, Texas 75075 (herein called the "Company"), and The Bank of New York, a
New York banking corporation as Trustee hereunder (herein called the
"Trustee").

                            RECITALS OF THE COMPANY

         The Company has duly authorized the creation of an issue of its 7%
Convertible Subordinated Notes due August 1, 2004 (herein called the
"Securities") of substantially the tenor and amount hereinafter set forth, and
to provide therefor the Company has duly authorized the execution and delivery
of this Indenture.

         All things necessary to make the Securities, when the Securities are
executed by the Company and authenticated and delivered hereunder, the valid
obligations of the Company, and to make this Indenture a valid agreement of the
Company, in accordance with their and its terms, have been done. Further, all
things necessary to duly authorize the issuance of the Common Stock of the
Company issuable upon the conversion of the Securities, and to duly reserve for
issuance the number of shares of Common Stock issuable upon such conversion,
have been done.

         NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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



<PAGE>   12



                                  ARTICLE ONE

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

SECTION 1.1. Definitions.

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

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

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

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

         "Act", when used with respect to any Holder of a Security, has the
meaning specified in Section 1.4.

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

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

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

         "Authenticating Agent" means any Person authorized pursuant to Section
6.12 to act on behalf of the Trustee to authenticate Securities.



                                      -2-

<PAGE>   13



         "Authorized Newspaper" means a newspaper in the English language,
customarily published on each Monday, Tuesday, Wednesday, Thursday and Friday,
whether or not published on Saturdays, Sundays or holidays, and of general
circulation in a Place of Payment.

         "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of that board empowered to act for it
with respect to this Indenture.

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

         "Business Day", when used with respect to any Place of Payment, Place
of Conversion or any other place, as the case may be, means each Monday,
Tuesday, Wednesday, Thursday and Friday which is not a day on which banking
institutions in such Place of Payment, Place of Conversion or other place, as
the case may be, are authorized or obligated by law or executive order to
close; provided, however, that a day on which banking institutions in New York,
New York are authorized or obligated by law or executive order to close shall
not be a Business Day for purposes of Section 13.9; provided, further, that a
day on which banking institutions in New York, New York are authorized or
obligated by law or executive order to close shall not be a Business Day for
purposes of Section 11.6.

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

         "Change in Control" has the meaning specified in Section 14.4(b).

         "Closing Price Per Share" means, with respect to the Common Stock of
the Company, for any day, (i) the closing bid price regular way on the Nasdaq
National Market or, (ii) if the Common Stock is not quoted on the Nasdaq
National Market, the reported last sales price regular way per share or, in
case no such reported sale takes place on such day, the average of the reported
closing bid and asked prices regular way, in either case, on the principal
national securities exchange on which the Common Stock is listed or admitted to
trading, or (iii) if the Common Stock is not quoted on the Nasdaq National
Market or listed or admitted to trading on any national securities exchange,
the average of the closing bid prices in the over-the-counter market as
furnished by any New York Stock Exchange member firm selected from time to time
by the Company for that purpose.

         "Code" has the meaning specified in Section 2.1.

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



                                     -3-

<PAGE>   14



         "Common Stock" means the Common Stock, par value $0.01 per share, of
the Company authorized at the date of this instrument as originally executed,
together with the related Preferred Share Purchase Rights of the Company
issuable with such Shares. Subject to the provisions of Section 12.11, shares
issuable on conversion or repurchase of Securities shall include only shares of
Common Stock or shares of any class or classes of common stock resulting from
any reclassification or reclassifications thereof; provided, however, that if
at any time there shall be more than one such resulting class, the shares so
issuable on conversion of Securities shall include shares of all such classes,
and the shares of each such class then so issuable shall be substantially in
the proportion which the total number of shares of such class resulting from
all such reclassifications bears to the total number of shares of all such
classes resulting from all such reclassifications.

         "Common stock" includes any stock of any class of capital stock which
has no preference in respect of dividends or of amounts payable in the event of
any voluntary or involuntary liquidation, dissolution or winding up of the
issuer thereof and which is not subject to redemption by the issuer thereof.

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

         "Company Notice" has the meaning specified in Section 14.3.

         "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman of the Board, its Vice
Chairman of the Board, its Chief Executive Officer, its President or a Vice
President, and by its principal financial officer, Treasurer, an Assistant
Treasurer, its Secretary or an Assistant Secretary, and delivered to the
Trustee.

         "Constituent Person" has the meaning specified in Section 12.11.

         "Conversion Agent" means any Person authorized by the Company to
convert Securities in accordance with Article Twelve. The Company has initially
appointed the Trustee as its Conversion Agent in the Borough of Manhattan, The
City of New York.

         "Conversion Price" has the meaning specified in Section 14.4(c).

         "Conversion Rate" has the meaning specified in Section 12.1.

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




                                     -4-

<PAGE>   15



         "corporation" means a corporation or company, including without
limitation a limited liability company, an association, joint-stock company or
business trust.

         "Defaulted Interest" has the meaning specified in Section 3.7.

         "Depositary" means, with respect to any Registered Securities, a
clearing agency that is registered as such under the Exchange Act and is
designated by the Company to act as Depositary for such Registered Securities
(or any successor securities clearing agency so registered).

         "Dollar" or "U.S.$" means a dollar or other equivalent unit in such
coin or currency of the United States as at the time shall be legal tender for
the payment of public and private debts.

         "DTC" means The Depository Trust Company, a New York corporation.

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

         "Event of Default" has the meaning specified in Section 5.1.

         "Exchange Act" means the United States Securities Exchange Act of 1934
(or any successor statute), as amended from time to time.

         "Exchange Date" means the date and day on which the Restricted Period
expires.

         "Global Security" means a Registered Security that is registered in
the Security Register in the name of a Depositary or a nominee thereof.

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

         "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
including, for all purposes of this instrument and any such supplemental
indenture, the provisions of the Trust Indenture Act that are deemed to be a
part of and govern this instrument and any such supplemental indenture,
respectively.

         "Initial Purchasers" means Goldman, Sachs & Co., NationsBanc Capital
Markets, Inc. and Goldman Sachs International, collectively.

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

                              -5- 




                                      
<PAGE>   16



         "Liquidated Damages" has the meaning specified in Section 10.12.

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

         "Non-electing Share" has the meaning specified in Section 12.11.

         "Notice of Default" has the meaning specified in Section 5.1.

         "Officers' Certificate" means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, the Chief Executive Officer, the
President or a Vice President and by the principal financial officer, the
Treasurer, an Assistant Treasurer, the Secretary or an Assistant Secretary of
the Company, and delivered to the Trustee.

         "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company and who shall be acceptable to the Trustee.

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

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

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

         (iii) Securities which have been paid pursuant to Section 3.6 or in
     exchange for or in lieu of which other Securities have been authenticated
     and delivered pursuant to this Indenture, other than any such Securities
     in respect of which there shall have been presented to the Trustee proof
     satisfactory to it that such Securities are held by a bona fide purchaser
     in whose hands such Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of Outstanding Securities are present at a meeting of Holders
of Securities for quorum purposes or have given any request, demand,
authorization, direction, notice, consent or waiver hereunder,



                                     -6-

<PAGE>   17



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

         "Paying Agent" means any Person authorized by the Company to pay the
principal of or interest on any Securities on behalf of the Company and, except
as otherwise specifically set forth herein, such term shall include the Company
if it shall act as its own Paying Agent. The Company has initially appointed
the Trustee as its Paying Agent in the Borough of Manhattan, The City of New
York.

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

         "Place of Conversion" has the meaning specified in Section 3.1.

         "Place of Payment" has the meaning specified in Section 3.1.

         "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 3.6 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Purchase Agreement" means the Purchase Agreement, dated as of August
7, 1997, between the Company and the Initial Purchasers, as such agreement may
be amended from time to time.

         "Record Date" means any Regular Record Date or Special Record Date.

         "Record Date Period" means the period from the close of business of
any Regular Record Date next preceding any Interest Payment Date to the opening
of business on such Interest Payment Date.

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




                                     -7-

<PAGE>   18



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

         "Registered Security" means any Security issued in substantially the
form set forth in Section 2.2 and registered in the Security Register. A Global
Security is a Registered Security.

         "Registrable Securities" has the meaning specified in Section 10.12.

         "Registration Default" has the meaning specified in Section 10.12.

         "Registration Rights Agreement" has the meaning specified in Section
2.2.

         "Regular Record Date" for interest payable in respect of any
Registered Security on any Interest Payment Date means the January 15 or July
15 (whether or not a Business Day), as the case may be, next preceding such
Interest Payment Date.

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

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

         "Regulation S Global Security" has the meaning specified in Section
2.1.

         "Regulation S Legend" means a legend substantially in the form of the
legend required in the form of Security set forth in Section 2.2 to be placed
upon a Regulation S Global Security.

         "Regulation S Securities" means all Securities required pursuant to
Section 3.5(c) to bear a Regulation S Legend. Such term includes the Regulation
S Global Security.

         "Repurchase Date" has the meaning specified in Section 14.1.

         "Repurchase Price" has the meaning specified in Section 14.1.

         "Responsible Officer", when used with respect to the Trustee, means
any officer within the Corporate Trust Office of the Trustee including without
limitation any vice president, assistant vice president, assistant treasurer,
assistant secretary, corporate trust officer, assistant corporate trust officer
or other employee of the Trustee customarily performing functions similar to
those performed by any of the above designated officers and also means, with
respect to a particular corporate trust matter, any other officer to whom such
matter is referred because of his knowledge and familiarity with the particular
subject.




                                     -8-

<PAGE>   19



         "Restricted Global Security" has the meaning specified in Section 2.1.

         "Restricted Period" means the period of 41 consecutive days beginning
on and including the later of (i) the day on which Securities are first offered
to persons other than distributors (as defined in Regulation S) in reliance on
Regulation S and (ii) the last original issuance date of the Securities.

         "Restricted Securities" means all Securities required pursuant to
Section 3.5(c) to bear any Restricted Securities Legend. Such term includes the
Restricted Global Security.

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

         "Restricted Securities Legend" means, collectively, the legends
substantially in the forms of the legends required in the form of Security set
forth in Section 2.2 to be placed upon each Restricted Security.

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

         "Rule 144A Information" has the meaning specified in Section 10.10.

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

         "Securities" has the meaning ascribed to it in the first paragraph
under the caption "Recitals of the Company".

         "Securities Act" means the United States Securities Act of 1933 (or
any successor statute), as amended from time to time.

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

         "Security Register" and "Security Registrar" have the respective
meanings specified in Section 3.5.

         "Senior Indebtedness" means the principal of (and premium, if any) and
interest (including all interest accruing subsequent to the filing of a
petition initiating any proceeding under city, state, federal or foreign
bankruptcy laws, whether or not allowable as a claim in any such proceeding)
on, and all fees and other amounts payable in connection with, the following,
whether absolute or contingent, secured or unsecured, due or to become due,
outstanding on the date of



                                     -9-

<PAGE>   20



the Indenture or thereafter created, incurred or assumed: (a) indebtedness of
the Company evidenced by credit or loan agreements, notes, bonds, debentures,
or other written obligations, including, but not limited to as of June 30, 1997
the Company's five-year, unsecured $160.0 million revolving credit facility
with several banks, $168.8 million outstanding principal amount of the
Company's 9.0% unsecured notes which mature from 1997 to 2003, $10.8 million
outstanding principal amount of the Company's 8.75% unsecured notes which
mature from 1997 to 2000 and $83.0 million outstanding principal amount of the
Company's variable rate unsecured notes which mature from 1999 to 2011, (b) all
obligations of the Company for money borrowed, (c) all obligations of the
Company evidenced by a note or similar instrument given in connection with the
acquisition of any businesses, properties or assets of any kind, (d)
obligations of the Company as lessee under leases required to be capitalized on
the balance sheet of the lessee under generally accepted accounting principles,
(e) obligations of the Company under interest rate and currency swaps, caps,
floors, collars, hedge agreements, forward contracts, or similar agreements or
arrangements intended to protect the Company against fluctuations in interest
or currency exchange rates, (f) all obligations of the type referred to in
clauses (a) through (e) above of another Person and all dividends of another
Person, the payment of which, in either case, the Company has assumed or
guaranteed, or for which the Company is responsible or liable, directly or
indirectly, jointly or severally, as obligor, guarantor or otherwise, or which
is secured by a lien on property of the Company, and (g) renewals, extensions,
modifications, replacements, restatements and refundings of, or any
indebtedness or obligation issued in exchange for, any such indebtedness or
obligation described in clauses (a) through (f) of this paragraph; provided,
however, that Senior Indebtedness shall not include the Securities or any such
indebtedness or obligation (a) if the terms of such indebtedness or obligation
(or the terms of the instrument under which, or pursuant to which it is issued)
provide that such indebtedness or obligation is not superior in right of
payment to the Securities, (b) if such indebtedness or obligation is
non-recourse to the Company or (c) if such indebtedness or obligation is a
conditional sale contract or any account payable or any other indebtedness
created or assumed by the Company in the ordinary course of business in
connection with the obtaining of inventories or services.

         "Shelf Registration Statement" has the meaning specified in Section
10.12.

         "Special Record Date" for the payment of any Defaulted Interest means
a date fixed by the Company pursuant to Section 3.7.

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

         "Subsidiary" means a corporation more than 50% of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by
one or more other Subsidiaries, or by the Company and one or more other
Subsidiaries. For the purposes of this definition, "voting stock" means stock
or other similar interests in the corporation which ordinarily has or have
voting power for the election of directors, or persons performing similar
functions, whether



                                    -10-

<PAGE>   21



at all times or only so long as no senior class of stock or other interests has
or have such voting power by reason of any contingency.

         "Successor Security" of any particular Security means every Security
issued after, and evidencing all or a portion of the same debt as that
evidenced by, such particular Security; and, for the purposes of this
definition, any Security authenticated and delivered under Section 3.6 in
exchange for or in lieu of a mutilated, destroyed, lost or stolen Security
shall be deemed to evidence the same debt as the mutilated, destroyed, lost or
stolen Security.

         "Surrender Certificate" means a certificate substantially in the form
set forth in Annex D.

         "Trading Days" means (i) if the Common Stock is quoted on the Nasdaq
National Market or any other system of automated dissemination of quotations of
securities prices, days on which trades may be effected through such system;
(ii) if the Common Stock is listed or admitted for trading on any national
securities exchange, days on which such national securities exchange is open
for business; or (iii) if the Common Stock is not listed or admitted for
trading on any national securities exchange or quoted on the Nasdaq National
Market or any other system of automated dissemination of quotation of
securities prices, days on which the Common Stock is traded regular way in the
over-the-counter market and for which a closing bid and a closing asked price
for the Common Stock are available.

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

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

         "United States" means the United States of America (including the
States and the District of Columbia), its territories, its possessions and
other areas subject to its jurisdiction (its "possessions" including Puerto
Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island and the
Northern Mariana Islands).

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

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




                                    -11-

<PAGE>   22



SECTION 1.2. Compliance Certificates and Opinions.

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

         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (including certificates
provided for in Section 10.9) shall include:

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

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

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

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

SECTION 1.3. Form of Documents Delivered to the Trustee.

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

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



                                    -12-

<PAGE>   23



is in the possession of the Company or such other Person, unless such counsel
knows, or in the exercise of reasonable care should know, that the certificate
or opinion or representations with respect to such matters are erroneous.

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

SECTION 1.4. Acts of Holders of Securities.

         (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided or permitted by this Indenture to be given or
taken by Holders of Securities may be embodied in and evidenced by (1) one or
more instruments of substantially similar tenor signed by such Holders in
person or by an agent or proxy duly appointed in writing by such Holders or (2)
the record of Holders of Securities voting in favor thereof, either in person
or by proxies duly appointed in writing, at any meeting of Holders of
Securities duly called and held in accordance with the provisions of Article
Nine. Such action shall become effective when such instrument or instruments or
record is delivered to the Trustee and, where it is hereby expressly required,
to the Company. The Trustee shall promptly deliver to the Company copies of all
such instruments and records delivered to the Trustee. Such instrument or
instruments and record (and the action embodied therein and evidenced thereby)
are herein sometimes referred to as the "Act" of the Holders of Securities
signing such instrument or instruments and so voting at such meeting. Proof of
execution of any such instrument or of a writing appointing any such agent or
proxy, or of the holding by any Person of a Security, shall be sufficient for
any purpose of this Indenture and (subject to Section 6.1) conclusive in favor
of the Trustee and the Company if made in the manner provided in this Section.
The record of any meeting of Holders of Securities shall be proved in the
manner provided in Section 9.6.

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

         (c) The principal amount and serial number of any Registered Security
held by any Person, and the date of his holding the same, shall be proved by
the Security Register.

         (d) The fact and date of execution of any such instrument or writing
and the authority of the Person executing the same may also be proved in any
other manner which the Trustee deems sufficient; and the Trustee may in any
instance require further proof with respect to any of the matters referred to
in this Section 1.4.




                                    -13-

<PAGE>   24



         (e) The Company may set any day as the record date for the purpose of
determining the Holders entitled to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action, or to vote
on any action, authorized or permitted by this Indenture to be given or taken
by Holders. Promptly and in any case not later than ten days after setting a
record date, the Company shall notify the Trustee and the Holders of such
record date. If not set by the Company prior to the first solicitation of a
Holder made by any Person in respect of any such action, or, in the case of any
such vote, prior to such vote, the record date for any such action or vote
shall be the 30th day (or, if later, the date of the most recent list of
Holders required to be provided pursuant to Section 15.1) prior to such first
solicitation or vote, as the case may be. With regard to any record date, the
Holders on such date (or their duly appointed agents or proxies), and only such
Persons, shall be entitled to give or take, or vote on, the relevant action,
whether or not such Holders remain Holders after such record date.
Notwithstanding the foregoing, the Company shall not set a record date for, and
the provisions of this paragraph shall not apply with respect to, any notice,
declaration or direction referred to in the next paragraph.

         Upon receipt by the Trustee from any Holder of (i) any notice of
default or breach referred to in Section 5.1(4), if such default or breach has
occurred and is continuing and the Trustee shall not have given such a notice
to the Company, (ii) any declaration of acceleration referred to in Section
5.2, if an Event of Default has occurred and is continuing and the Trustee
shall not have given such a declaration to the Company, or (iii) any direction
referred to in Sec tion 5.12, if the Trustee shall not have taken the action
specified in such direction, then, with respect to clauses (ii) and (iii), a
record date shall automatically and without any action by the Company or the
Trustee be set for determining the Holders entitled to join in such declaration
or direction, which record date shall be the close of business on the tenth day
(or, if such day is not a Business Day, the first Business Day thereafter)
following the day on which the Trustee receives such declaration or direction,
and, with respect to clause (i), the Trustee may set any day as a record date
for the purpose of determining the Holders entitled to join in such notice of
default. Promptly after such receipt by the Trustee of any such declaration or
direction referred to in clause (ii) or (iii), and promptly after setting any
record date with respect to clause (i), and as soon as practicable thereafter,
the Trustee shall notify the Company and the Holders of any such record date so
fixed. The Holders on such record date (or their duly appointed agents or
proxies), and only such Persons, shall be entitled to join in such notice,
declaration or direction, whether or not such Holders remain Holders after such
record date; provided that, unless such notice, declaration or direction shall
have become effective by virtue of Holders of the requisite principal amount of
Securities on such record date (or their duly appointed agents or proxies)
having joined therein on or prior to the 90th day after such record date, such
notice, declaration or direction shall automatically and without any action by
any Person be canceled and of no further effect. Nothing in this paragraph
shall be construed to prevent a Holder (or a duly appointed agent or proxy
thereof) from giving, before or after the expiration of such 90-day period, a
notice, declaration or direction contrary to or different from, or, after the
expiration of such period, identical to, the notice, declaration or direction
to which such record date relates, in which event a new record date in respect
thereof shall be set pursuant to this paragraph. In addition, nothing in this
paragraph shall be construed to render ineffective any notice, declaration or
direction of the type referred to



                                    -14-

<PAGE>   25



in this paragraph given at any time to the Trustee and the Company by Holders
(or their duly appointed agents or proxies) of the requisite principal amount
of Securities on the date such notice, declaration or direction is so given.

         (f) Except as provided in Sections 5.12 and 5.13, any request, demand,
authorization, direction, notice, consent, election, waiver or other Act of the
Holder of any Security shall bind every future Holder of the same Security and
the Holder of every Security issued upon the registration of transfer thereof
or in exchange therefor or in lieu thereof in respect of anything done, omitted
or suffered to be done by the Trustee or the Company in reliance thereon,
whether or not notation of such action is made upon such Security.

         (g) The provisions of this Section 1.4 are subject to the provisions
of Section 9.5.

SECTION 1.5. Notices, Etc., to Trustee and Company.

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

         (1) the Trustee by any Holder of Securities or by the Company shall
     be sufficient for every purpose hereunder if made, given, furnished or
     filed in writing to or with the Trustee and received at its Corporate
     Trust Office, ATTENTION: CORPORATE TRUST ADMINISTRATION.

         (2) the Company by the Trustee or by any Holder of Securities shall
     be sufficient for every purpose hereunder (unless otherwise herein
     expressly provided) if in writing, mailed, first-class postage prepaid, or
     telecopied and confirmed by mail, first-class postage prepaid, or
     delivered by hand or overnight courier, addressed to the Company at DSC
     Communications Corporation, 1000 Coit Road, Plano, Texas 75075, Attention:
     Treasurer; facsimile no.: (972) 519-2688, or at any other address
     previously furnished in writing to the Trustee by the Company.

         Any request, demand, authorization, direction, notice, consent,
election or waiver required or permitted under this Indenture shall be in the
English language, except that any published notice may be in an official
language of the country of publication.

SECTION 1.6. Notice to Holders of Securities; Waiver.

         Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of Securities of any event, such notice shall be
sufficiently given to Holders if in writing and mailed, first-class postage
prepaid, to each Holder of a Security affected by such event, at the address of
such Holder as it appears in the Security Register, not earlier than the
earliest date and not later than the latest date prescribed for the giving of
such notice.



                                    -15-

<PAGE>   26



         Neither the failure to mail such notice, nor any defect in any notice
so mailed, to any particular Holder of a Registered Security shall affect the
sufficiency of such notice with respect to other Holders of Registered
Securities. In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by
mail, then such notification to Holders of Registered Securities as shall be
made with the approval of the Trustee, which approval shall not be unreasonably
withheld, shall constitute a sufficient notification to such Holders for every
purpose hereunder.

         Such notice shall be deemed to have been given when such notice is
mailed.

         Where this Indenture provides for notice in any manner, such notice
may be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice. Waivers of notice by Holders of Securities shall be filed with the
Trustee, but such filing shall not be a condition precedent to the validity of
any action taken in reliance upon such waiver.

SECTION 1.7. Effect of Headings and Table of Contents.

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

SECTION 1.8. Successors and Assigns.

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

SECTION 1.9. Separability Clause.

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

SECTION 1.10. Benefits of Indenture.

         Except as provided in the next sentence, nothing in this Indenture or
in the Securities, express or implied, shall give to any Person, other than the
parties hereto and their successors and assigns hereunder and the Holders of
Securities, any benefit or legal or equitable right, remedy or claim under this
Indenture. The provisions of Article Thirteen are intended to be for the
benefit of, and shall be enforceable directly by, the holders of Senior
Indebtedness.




                                    -16-

<PAGE>   27



SECTION 1.11. Governing Law.

         THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, THE UNITED STATES OF
AMERICA.

SECTION 1.12. Legal Holidays.

         In any case where any Interest Payment Date, Redemption Date,
Repurchase Date or Stated Maturity of any Security or the last day on which a
Holder of a Security has a right to convert his Security shall not be a
Business Day at a Place of Payment or Place of Conversion, as the case may be,
then (notwithstanding any other provision of this Indenture or of the
Securities) payment of principal of, premium, if any, or interest on, or the
payment of the Repurchase Price (whether the same is payable in cash or in
shares of Common Stock) with respect to, or delivery for conversion of, such
Security need not be made at such Place of Payment or Place of Conversion, as
the case may be, on or by such day, but may be made on or by the next
succeeding Business Day at such Place of Payment or Place of Conversion, as the
case may be, with the same force and effect as if made on the Interest Payment
Date, Redemption Date or Repurchase Date, or at the Stated Maturity or by such
last day for conversion; provided, however, that in the case that payment is
made on such succeeding Business Day, no interest shall accrue on the amount so
payable for the period from and after such Interest Payment Date, Redemption
Date, Repurchase Date, Stated Maturity or last day for conversion, as the case
may be.

SECTION 1.13. Conflict with Trust Indenture Act.

         If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such Act to be a
part of and govern this Indenture, the latter provision shall control. If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall
be deemed to apply to this Indenture as so modified or to be excluded, as the
case may be. Until such time as this Indenture shall be qualified under the
Trust Indenture Act, this Indenture, the Company and the Trustee shall be
deemed for all purposes hereof to be subject to and governed by the Trust
Indenture Act to the same extent as would be the case if this Indenture were so
qualified on the date hereof.



                                    -17-

<PAGE>   28



                                  ARTICLE TWO

                                 SECURITY FORMS


SECTION 2.1. Form Generally.

         The Securities shall be in substantially the forms set forth in this
Article, with such appropriate insertions, omissions, substitutions and other
variations as are required or permitted by this Indenture, and may have such
letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange, the Internal Revenue Code of 1986, as amended, and
regulations thereunder (the "Code"), or as may, consistently herewith, be
determined by the officers executing such Securities, as evidenced by their
execution thereof. All Securities shall be Registered Securities.

         The Trustee's certificates of authentication shall be in substantially
the form set forth in Section 2.3.

         Conversion notices shall be in substantially the form set forth in
Section 2.5.

         Repurchase notices shall be substantially in the form set forth in
Section 2.2.

         The Securities shall be printed, lithographed, typewritten or engraved
or produced by any combination of these methods on steel engraved borders if so
required by any securities exchange upon which the Securities may be listed, or
may be produced in any other manner permitted by the rules of any such
securities exchange, or, if the Securities are not listed on a securities
exchange, in any other manner approved by the Company all as determined by the
officers executing such Securities, as evidenced by their execution thereof.

         Upon their original issuance, Rule 144A Securities shall be issued in
the form of one or more Global Securities without interest coupons and shall be
registered in the name of DTC, as Depositary, or its nominee and deposited with
the Trustee, as custodian for DTC, for credit by DTC to the respective accounts
of beneficial owners of the Securities represented thereby (or such other
accounts as they may direct). Such Global Security, together with its Successor
Securities which are Global Securities other than the Regulation S Global
Security, are collectively herein called the "Restricted Global Security".

         Upon their original issuance, Regulation S Securities shall be issued
in the form of one or more Global Securities without interest coupons and shall
be registered in the name of DTC, as Depositary, or its nominee and deposited
with the Trustee, as custodian for DTC for credit to the respective accounts at
DTC of the depositaries for Morgan Guaranty Trust Company of New York, Brussels
office, as operator of Euroclear, or CEDEL. Such Global Security,



                                    -18-

<PAGE>   29



together with its Successor Securities which are Global Securities other than
the Restricted Global Security, are collectively herein called the "Regulation
S Global Security".


SECTION 2.2. Form of Security

                                 [FORM OF FACE]

[THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH RESTRICTED SECURITY
OTHER THAN ANY RESTRICTED GLOBAL SECURITY:

         THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), AND THIS SECURITY AND ANY SHARES OF
COMMON STOCK ISSUABLE UPON ITS CONVERSION MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLI CABLE EXEMPTION
THEREFROM. THIS SECURITY MAY ONLY BE SOLD IN ACCORDANCE WITH THE INDENTURE,
COPIES OF WHICH ARE AVAILABLE FOR INSPECTION AT THE CORPORATE TRUST OFFICE OF
THE TRUSTEE. EACH PURCHASER OF THIS SECURITY WHICH IS A QUALIFIED INSTITUTIONAL
BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IS HEREBY NOTIFIED
THAT THE SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE
PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

         THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF DSC
COMMUNICATIONS CORPORATION (THE "COMPANY") THAT (A) THIS SECURITY AND ANY
SHARES OF COMMON STOCK ISSUABLE UPON ITS CONVERSION MAY BE RESOLD, PLEDGED OR
OTHERWISE TRANSFERRED ONLY (I) TO A PERSON WHO THE SELLER REASONABLY BELIEVES
IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE
SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (II) IN
AN OFFSHORE TRANSACTION COMPLYING WITH THE PROVISIONS OF RULE 904 OF REGULATION
S UNDER THE SECURITIES ACT, (III) IN THE CASE OF ANY PURCHASER, OTHER THAN A
PURCHASER WHO HAS OTHERWISE AGREED WITH THE COMPANY IN WRITING, TO AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" WITHIN THE MEANING OF RULE
501(A)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT IN A TRANSACTION EXEMPT
FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (IF AVAILABLE), (IV)
PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY
RULE 144 THEREUNDER (IF AVAILABLE), OR (V) PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND IN EACH OF CASES (I)
THROUGH (V) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF THE STATES AND
OTHER JURISDICTIONS OF THE UNITED STATES, AND THAT (B) THE HOLDER WILL, AND
EACH SUBSEQUENT HOLDER OF THIS SECURITY OR ANY SHARES OF COMMON STOCK ISSUABLE
UPON ITS CONVERSION IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY AND
ANY COMMON STOCK ISSUABLE UPON ITS CONVERSION FROM IT OF THE RESALE
RESTRICTIONS REFERRED TO IN (A) ABOVE.



                                    -19-

<PAGE>   30



         THIS SECURITY, ANY SHARES OF COMMON STOCK ISSUABLE UPON ITS CONVERSION
AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME
TO MODIFY THE RESTRICTIONS ON AND PROCEDURES FOR RESALES AND OTHER TRANSFERS OF
THIS SECURITY AND ANY SUCH SHARES TO REFLECT ANY CHANGE IN APPLICABLE LAW OR
REGULATION (OR THE INTERPRETATION THEREOF) OR IN PRACTICES RELATING TO THE
RESALE OR TRANSFER OF RESTRICTED SECURITIES GENERALLY. THE HOLDER OF THIS
SECURITY AND ANY SUCH SHARES SHALL BE DEEMED BY THE ACCEPTANCE OF THIS SECURITY
AND ANY SUCH SHARES TO HAVE AGREED TO ANY SUCH AMENDMENT OR SUPPLEMENT.]

[THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH RESTRICTED GLOBAL
SECURITY:

         THE SECURITIES EVIDENCED BY THIS GLOBAL SECURITY (OR ITS PREDECESSOR)
WERE ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE
UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND
SUCH SECURITIES AND ANY SHARES OF COMMON STOCK ISSUABLE UPON THEIR CONVERSION
MAY NOT BE SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR
AN APPLICABLE EXEMPTION THEREFROM. SUCH SECURITIES MAY ONLY BE SOLD IN
ACCORDANCE WITH THE INDENTURE, COPIES OF WHICH ARE AVAILABLE FOR INSPECTION AT
THE CORPORATE TRUST OFFICE OF THE TRUSTEE. EACH PURCHASER OF ANY BENEFICIAL
INTEREST IN THE SECURITIES WHICH IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED
IN RULE 144A UNDER THE SECURITIES ACT) IS HEREBY NOTIFIED THAT THE SELLER OF
SUCH BENEFICIAL INTEREST IN THE SECURITIES MAY BE RELYING ON THE EXEMPTION FROM
THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A
THEREUNDER.

         EACH BENEFICIAL OWNER OF AN INTEREST IN ANY OF THE SECURITIES
EVIDENCED BY THIS RESTRICTED GLOBAL SECURITY (INCLUDING ANY PARTICIPANT IN THE
DEPOSITARY HOLDING THE RESTRICTED GLOBAL SECURITY THAT IS SHOWN AS HOLDING SUCH
AN INTEREST ON THE RECORDS OF SUCH DEPOSITARY AND EACH BENEFICIAL OWNER THAT
HOLDS THROUGH ANY SUCH PARTICIPANT) AGREES FOR THE BENEFIT OF DSC
COMMUNICATIONS CORPORATION (THE "COMPANY") THAT (A) ANY BENEFICIAL INTEREST IN
THE SECURITIES AND ANY SHARES OF COMMON STOCK ISSUABLE UPON THEIR CONVERSION
MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED ONLY (I) TO A PERSON WHO THE
SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN
RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS
OF RULE 144A, (II) IN AN OFFSHORE TRANSACTION COMPLYING WITH THE PROVISIONS OF
RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, (III) IN THE CASE OF ANY
PURCHASER, OTHER THAN A PURCHASER WHO HAS OTHERWISE AGREED WITH THE COMPANY IN
WRITING, TO AN INSTITUTION THAT IS AN "ACCREDITED INVESTOR" WITHIN THE MEANING
OF RULE 501(A)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT IN A TRANSACTION
EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (IF AVAILABLE),
(IV) PURSUANT TO AN EXEMPTION FROM



                                    -20-

<PAGE>   31



REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF
AVAILABLE), OR (V) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND IN EACH OF CASES (I) THROUGH (V) IN ACCORDANCE WITH ANY
APPLICABLE SECURITIES LAWS OF THE STATES AND OTHER JURISDICTIONS OF THE UNITED
STATES, AND THAT (B) THE BENEFICIAL OWNER WILL, AND EACH SUBSEQUENT BENEFICIAL
OWNER OF THIS SECURITY OR ANY SHARES OF COMMON STOCK ISSUABLE UPON ITS
CONVERSION IS REQUIRED TO, NOTIFY ANY PURCHASER OF ANY BENEFICIAL INTEREST IN
THE SECURITIES AND ANY COMMON STOCK ISSUABLE UPON ITS CONVERSION FROM IT OF THE
RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

         THIS SECURITY, ANY SHARES OF COMMON STOCK ISSUABLE UPON ITS CONVERSION
AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME
TO MODIFY THE RESTRICTIONS ON AND PROCEDURES FOR RESALES AND OTHER TRANSFERS OF
THIS SECURITY AND ANY SUCH SHARES TO REFLECT ANY CHANGE IN APPLICABLE LAW OR
REGULATION (OR THE INTERPRETATION THEREOF) OR IN PRACTICES RELATING TO THE
RESALE OR TRANSFER OF RESTRICTED SECURITIES GENERALLY. THE HOLDER AND
BENEFICIAL OWNERS OF AN INTEREST IN ANY OF THE SECURITIES EVIDENCED BY THIS
GLOBAL SECURITY AND ANY SUCH SHARES SHALL BE DEEMED BY THE ACCEPTANCE OF THIS
GLOBAL SECURITY AND THE BENEFICIAL INTERESTS THEREIN AND ANY SUCH SHARES TO
HAVE AGREED TO ANY SUCH AMENDMENT OR SUPPLEMENT.]

[THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL SECURITY:

         THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A
NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE COMPANY, THE TRUSTEE AND
ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES.]

[THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL SECURITY FOR
WHICH DTC IS TO BE THE DEPOSITARY:

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO DSC
COMMUNICATIONS CORPORATION OR ITS AGENT FOR REGISTRATION OR 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 DTC
(AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE
HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR REGISTERED
SECURITIES IN DEFINITIVE REGISTERED FORM IN THE LIMITED



                                    -21-

<PAGE>   32



CIRCUMSTANCES REFERRED TO IN THE INDENTURE, THIS GLOBAL SECURITY MAY NOT BE
TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY
OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE
DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY
OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.]

[THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH REGULATION S
GLOBAL SECURITY:

         THE SECURITIES EVIDENCED BY THIS GLOBAL SECURITY (OR ITS PREDECESSOR)
WERE ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE
UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND
MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED IN THE UNITED STATES
OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, ANY U.S. PERSON EXCEPT PURSUANT TO AN
AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT
AND ALL APPLICABLE STATE SECURITIES LAWS. TERMS USED ABOVE HAVE THE MEANINGS
GIVEN THEM IN REGULATION S UNDER THE SECURITIES ACT.]


                         DSC COMMUNICATIONS CORPORATION

                        7% CONVERTIBLE SUBORDINATED NOTE
                               DUE AUGUST 1, 2004

No. _____________                                                  U.S.$_____

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



         DSC COMMUNICATIONS CORPORATION, a corporation duly organized and
existing under the laws of the State of Delaware (herein called the "Company",
which term includes any successor Person under the Indenture referred to on the
reverse hereof), for value received, hereby promises to pay to _______________,
or registered assigns, the principal sum of _____________ United States Dollars
(U.S.$ _____) [IF THIS SECURITY IS A GLOBAL SECURITY, THEN INSERT -- (which
principal amount may from time to time be increased or decreased to such other
principal amounts (which, taken together with the principal amounts of all
other Outstanding Securities, shall not exceed $400,000,000 in the aggregate at
any time) by adjustments made on the records of the Trustee hereinafter
referred to in accordance with the Indenture)] on August 1, 2004 and to pay
interest thereon, from August 12, 1997, or from the most recent Interest
Payment Date (as defined below) to which interest has been paid or duly
provided for, semi-annually in arrears on February 1 and August 1 in each year
(each, an "Interest Payment Date"), commencing



                                    -22-

<PAGE>   33



February 1, 1998, at the rate of 7% per annum, until the principal hereof is
due, and at the rate of 7% per annum on any overdue principal and premium, if
any, and, to the extent permitted by law, on any overdue interest. The interest
so payable, and punctually paid or duly provided for, on any Interest Payment
Date will, as provided in the Indenture, be paid to the Person in whose name
this Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest, which shall be
the January 15 or July 15 (whether or not a Business Day), as the case may be,
next preceding such Interest Payment Date. Except as otherwise provided in the
Indenture, any such interest not so punctually paid or duly provided for will
forthwith cease to be payable to the Holder on such Regular Record Date and may
either be paid to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on a Special
Record Date for the payment of such Defaulted Interest to be fixed by the
Company, notice whereof shall be given to Holders of Registered Securities not
less than 10 days prior to such Special Record Date, or be paid at any time in
any other lawful manner not inconsistent with the requirements of any
securities exchange on which the Securities may be listed, and upon such notice
as may be required by such exchange, all as more fully provided in the
Indenture. Payments of principal shall be made upon the surrender of this
Security at the option of the Holder at the Corporate Trust Office of the
Trustee, or at such other office or agency of the Company as may be designated
by it for such purpose in the Borough of Manhattan, The City of New York, in
such coin or currency of the United States of America as at the time of payment
shall be legal tender for the payment of public and private debts, or at such
other offices or agencies as the Company may designate, by United States Dollar
check drawn on, or transfer to, a United States Dollar account (such a transfer
to be made only to a Holder of an aggregate principal amount of Registered
Securities in excess of U.S.$2,000,000, and only if such Holder shall have
furnished wire instructions in writing to the Trustee no later than 15 days
prior to the relevant payment date) maintained by the payee with a bank in the
Borough of Manhattan, The City of New York. Payment of interest on this
Security may be made by United States Dollar check drawn on a bank in the
Borough of Manhattan, The City of New York mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register, or,
upon written application by the Holder to the Security Registrar setting forth
wire instructions not later than the relevant Record Date, by transfer to a
United States Dollar account (such a transfer to be made only to a Holder of an
aggregate principal amount of Registered Securities in excess of U.S.$2,000,000
and only if such Holder shall have furnished wire instructions in writing to
the Trustee no later than 15 days prior to the relevant payment date)
maintained by the payee with a bank in the Borough of Manhattan, The City of
New York.

         Except as specifically provided herein and in the Indenture, the
Company shall not be required to make any payment with respect to any tax,
assessment or other governmental charge imposed by any government or any
political subdivision or taxing authority thereof or therein.

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




                                    -23-

<PAGE>   34



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




                                    -24-

<PAGE>   35



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


                                           DSC  COMMUNICATIONS  CORPORATION


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


[Certificate of Authentication]



Dated:  [Date of Authentication]








                                    -25-

<PAGE>   36



                               [FORM OF REVERSE]

         This Security is one of a duly authorized issue of securities of the
Company designated as its "7% Convertible Subordinated Notes due August 1,
2004" (herein called the "Securities"), limited in aggregate principal amount
to U.S.$400,000,000, issued and to be issued under an Indenture, dated as of
August 12, 1997 (herein called the "Indenture"), between the Company and The
Bank of New York, as Trustee (herein called the "Trustee", which term includes
any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of
the Company, the Trustee, the holders of Senior Indebtedness and the Holders of
the Securities and of the terms upon which the Securities are, and are to be,
authenticated and delivered. As provided in the Indenture and subject to
certain limitations therein set forth, Registered Securities are exchangeable
for a like aggregate principal amount of Registered Securities of any
authorized denominations as requested by the Holder surrendering the same upon
surrender of the Registered Security or Registered Securities to be exchanged,
at the Corporate Trust Office of the Trustee. The Trustee upon such surrender
by the Holder will issue the new Registered Securities in the requested
denominations.

         No sinking fund is provided for the Securities. The Securities are
subject to redemption at the option of the Company at any time on or after
August 1, 2000, in whole or in part, upon not less than 30 nor more than 60
days' notice to the Holders prior to the Redemption Date at the following
Redemption Prices (expressed as percentages of the principal amount) for the
twelve-month period beginning on August 1 of the following years:



<TABLE>
<CAPTION>
             Year                                Redemption Price
             ----                                ----------------
             <S>                                      <C>   
             2000                                     104.0%
             2001                                     103.0%
             2002                                     102.0%
             2003                                     101.0%
</TABLE>

and thereafter at a Redemption Price equal to 100% of the principal amount,
together, in each case, with accrued interest to the Redemption Date; provided,
however, that interest installments on Registered Securities whose Stated
Maturity is on or prior to such Redemption Date will be payable to the Holders
of such Securities, or one or more Predecessor Securities, of record at the
close of business on the relevant Record Dates referred to on the face hereof,
all as provided in the Indenture.

         In the event of a redemption of the Securities, the Company will not
be required (a) to register the transfer or exchange of Registered Securities
for a period of 15 days immediately



                                    -26-

<PAGE>   37



preceding the date notice is given identifying the serial numbers of the
Securities called for such redemption or (b) to register the transfer or
exchange of any Registered Security, or portion thereof, called for redemption.

         Notice to the Holders will be given not less than 30 nor more than 60
days prior to the Redemption Date as provided in the Indenture.

         In any case where the due date for the payment of the principal of,
premium, if any, interest, or Liquidated Damages on any Security or the last
day on which a Holder of a Security has a right to convert his Security shall
be, at any Place of Payment or Place of Conversion, as the case may be, a day
on which banking institutions at such Place of Payment or Place of Conversion
are authorized or obligated by law or executive order to close, then payment of
principal, premium, if any, interest, or Liquidated Damages, or delivery for
conversion of such Security need not be made on or by such date at such place
but may be made on or by the next succeeding day at such place which is not a
day on which banking institutions are authorized or obligated by law or
executive order to close, with the same force and effect as if made on the date
for such payment or the date fixed for redemption or repurchase, or by such
last day for conversion, and no interest shall accrue on the amount so payable
for the period after such date.

         Subject to and upon compliance with the provisions of the Indenture,
the Holder of this Security is entitled, at his option, at any time on or after
90 days after the last original issue date of the Notes and on or before the
close of business on August 1, 2004, or in case this Security or a portion
hereof is called for redemption or the Holder hereof has exercised his right to
require the Company to repurchase this Security or such portion hereof, then in
respect of this Security until and including, but (unless the Company defaults
in making the payment due upon redemption or repurchase, as the case may be)
not after, the close of business on the fifth Trading Pay prior to Redemption
Date or the second Trading Day prior to Repurchase Date, as the case may be, to
convert this Security (or any portion of the principal amount hereof that is an
integral multiple of U.S.$1,000, provided that the unconverted portion of such
principal amount is U.S.$1,000 or any integral multiple of U.S.$1,000 in excess
thereof) into fully paid and nonassessable shares of Common Stock of the
Company at an initial Conversion Price of U.S. $49.725 for each share of Common
Stock (or at the current adjusted Conversion Price if an adjustment has been
made as provided in the Indenture) by surrender of this Security, duly endorsed
or assigned to the Company or in blank and, in case such surrender shall be
made during the period from the close of business on any Regular Record Date
next preceding any Interest Payment Date to the opening of business on such
Interest Payment Date (except if this Security has been called for redemption
on a Redemption Date or is repurchasable on a Repurchase Date occurring, in
either case, during such period and is surrendered for such conversion during
such period), also accompanied by payment in New York Clearing House or other
funds acceptable to the Company of an amount equal to the interest payable on
such Interest Payment Date on the principal amount of this Security then being
converted, and also the conversion notice hereon duly executed, to the Company
at the Corporate Trust Office of the Trustee, or at such other office or agency
of the Company, subject to any laws or regulations applicable thereto and
subject to the right of the



                                    -27-

<PAGE>   38



Company to terminate the appointment of any Conversion Agent (as defined below)
as may be designated by it for such purpose in the Borough of Manhattan, The
City of New York, or at such other offices or agencies as the Company may
designate (each a "Conversion Agent"), provided, further, that if this Security
or portion hereof has been called for redemption on a Redemption Date or is
repurchasable on a Repurchase Date occurring, in either case, during the period
from the close of business on any Regular Record Date next preceding any
Interest Payment Date to the opening of business on such succeeding Interest
Payment Date and is surrendered for conversion during such period, then the
Holder of this Security who converts this Security or a portion hereof during
such period will be entitled to receive the interest accruing hereon from the
Interest Payment Date next preceding the date of such conversion to such
succeeding Interest Payment Date and shall not be required to pay such interest
upon surrender of this Security for conversion. Subject to the provisions of
the preceding sentence and, in the case of a conversion after the close of
business on the Regular Record Date next preceding any Interest Payment Date
and on or before the close of business on such Interest Payment Date, to the
right of the Holder of this Security (or any Predecessor Security of record as
of such Regular Record Date) to receive the related installment of interest to
the extent and under the circumstances provided in the Indenture, no cash
payment or adjustment is to be made on conversion for interest accrued hereon
from the Interest Payment Date next preceding the day of conversion, or for
dividends on the Common Stock issued on conversion hereof. The Company shall
thereafter deliver to the Holder the fixed number of shares of Common Stock
(together with any cash adjustment, as provided in the Indenture) into which
this Security is convertible and such delivery will be deemed to satisfy the
Company's obligation to pay the principal amount of this Security. No fractions
of shares or scrip representing fractions of shares will be issued on
conversion, but instead of any fractional interest (calculated to the nearest
1/100th of a share) the Company shall pay a cash adjustment as provided in the
Indenture. The Conversion Price is subject to adjustment as provided in the
Indenture. In addition, the Indenture provides that in case of certain
consolidations or mergers to which the Company is a party or the conveyance,
transfer, sale or lease of all or substantially all of the property and assets
of the Company, the Indenture shall be amended, without the consent of any
Holders of Securities, so that this Security, if then Outstanding, will be
convertible thereafter, during the period this Security shall be convertible as
specified above, only into the kind and amount of securities, cash and other
property receivable upon such consolidation, merger, conveyance, transfer, sale
or lease by a holder of the number of shares of Common Stock of the Company
into which this Security could have been converted immediately prior to such
consolidation, merger, conveyance, transfer, sale or lease (assuming such
holder of Common Stock is not a Constituent Person, failed to exercise any
rights of election and received per share the kind and amount received per
share by a plurality of Non-electing Shares and further assuming, if such
consolidation, merger, conveyance, transfer, sale or lease occurs prior to 90
days following the last original issue date of the Securities, that the
Security was convertible at the time of such occurrence at the Conversion Price
specified above as adjusted from the issue date of such Security to such time
as provided in the Indenture). No adjustment in the Conversion Price will be
made until such adjustment would require an increase or decrease of at least
one percent of such price, provided that any adjustment that would otherwise be
made will be carried forward and taken into account in the computation of any
subsequent adjustment.



                                    -28-

<PAGE>   39



         Subject to certain limitations in the Indenture, at any time when the
Company is not subject to Section 13 or 15(d) of the United States Securities
Exchange Act of 1934, as amended, upon the request of a Holder of a Restricted
Security or the holder of shares of Common Stock issued upon conversion
thereof, the Company will promptly furnish or cause to be furnished Rule 144A
Information (as defined below) to such Holder of Restricted Securities or such
holder of shares of Common Stock issued upon conversion of Restricted
Securities, or to a prospective purchaser of any such security designated by
any such Holder or holder, as the case may be, to the extent required to permit
compliance by such Holder or holder with Rule 144A under the United States
Securities Act of 1933, as amended (the "Securities Act"), in connection with
the resale of any such security. "Rule 144A Information" shall be such
information as is specified pursuant to Rule 144A(d)(4) under the Securities
Act (or any successor provision thereto).

         If this Security is a Registrable Security, then the Holder of this
Security [IF THIS SECURITY IS A GLOBAL SECURITY, THEN INSERT-- (including any
Person that has a beneficial interest in this Security)] and the Common Stock
issuable upon conversion hereof is entitled to the benefits of a Registration
Rights Agreement, dated as of August 7, 1997 (the "Registration Rights
Agreement"), executed by the Company. Pursuant to the Registration Rights
Agreement, the Company has agreed for the benefit of the Holders from time to
time of Registered Securities and the Common Stock issuable upon conversion
thereof, in each case, that are Registrable Securities, at the Company's
expense, (a) to file within 90 days after the first date of original issuance
of the Securities, a shelf registration statement (the "Shelf Registration
Statement") with the Commission with respect to resales of the Registrable
Securities, (b) thereafter to use reasonable efforts to cause such Shelf
Registration Statement to be declared effective by the Commission within 90
days after the filing of such Shelf Registration Statement, and (c) to use
reasonable efforts to maintain such Shelf Registration Statement continuously
effective under the Securities Act until a period of the two years from the
last date of original issuance of the Securities or, if earlier, until (1)
there are no outstanding Registrable Securities or (2) when, in the written
opinion of independent counsel to the Company, all outstanding Registrable
Securities held by persons that are not "affiliates" of the Company (as defined
in Rule 144(a)(1) under the Securities Act) may be resold without registration
under the Securities Act pursuant to Rule 144(k) under the Securities Act (or
any successor provision thereto) and the Company has removed all legends from
the Registrable Securities restricting the transfer thereof (other than any
Registrable Security held by an affiliate).

         If (i) on or prior to 90 days following the date of original issuance
of the Registered Securities, a Shelf Registration Statement has not been filed
with the Commission, or (ii) on or prior to the 90th day following such filing,
such Shelf Registration Statement is not declared effective (each, a
"Registration Default"), additional interest ("Liquidated Damages") will accrue
on this Security from and including the day following such Registration Default
to but excluding the day on which such Registration Default has been cured.
Liquidated Damages will be paid semi-annually in arrears, with the first
semi-annual payment due on the first interest payment date in respect of the
Registered Securities following the date on which such Liquidated Damages begin
to accrue, and will accrue at a rate per annum equal to an additional
one-quarter of one percent (.25%) of the principal amount of the Registered
Securities to and including the 90th day following



                                    -29-

<PAGE>   40



such Registration Default and at a rate per annum equal to one-half of one
percent (.50%) thereof from and after the 91st day following such Registration
Default. In the event that the Shelf Registration Statement ceases to be
effective (or the Holders are otherwise prevented or restricted by the Company
from effecting sales pursuant thereto) prior to the third annual anniversary of
the initial effective date of the Shelf Registration Statement or such earlier
date as is provided in the Registration Rights Agreement for a period in excess
of 60 days, whether or not consecutive, during any 12-month period (an
"Effectiveness Failure"), then the interest rate borne by the Registered
Securities shall increase by an additional one-half of one percent (.50%) per
annum from the 61st day of the applicable 12-month period such Shelf
Registration Statement ceases to be effective (or the Holders are otherwise
prevented or restricted by the Company from effecting sales pursuant thereto)
to but excluding the day on which the Effectiveness Failure is cured. For
purposes of determining an Effectiveness Failure, days on which the Company has
been obligated to pay Liquidated Damages in respect of a prior Effectiveness
Failure within the applicable 12 month period will not be included.

         Whenever in this Security there is a reference, in any context, to the
payment of the principal of, premium, if any, or interest on, or in respect of,
any Security such mention shall be deemed to include mention of the payment of
Liquidated Damages payable as described in the preceding paragraph to the
extent that, in such context, Liquidated Damages are, were or would be payable
in respect of this Security pursuant to such paragraph, and an express mention
of the payment of Liquidated Damages (if applicable) in any provisions of this
Security shall not be construed as excluding Liquidated Damages in those
provisions of this Security where such express mention is not made.

         [If this Security is a Registrable Security and the Holder of this
Security [IF THIS SECURITY IS A GLOBAL SECURITY, THEN INSERT-- (including any
Person that has a beneficial interest in this Security)] elects to sell this
Security pursuant to the Shelf Registration Statement then, by its acceptance
hereof, such Holder of this Security agrees to be bound by the terms of the
Registra tion Rights Agreement relating to the Registrable Securities which are
the subject of such election.]

         If a Change in Control occurs, the Holder of this Security, at the
Holder's option, shall have the right, in accordance with the provisions of the
Indenture, to require the Company to repurchase this Security (or any portion
of the principal amount hereof that is an integral multiple of $1,000, provided
that the portion of the principal amount of this Security to be Outstanding
after such repurchase is at least equal to U.S.$5,000) for cash at a Repurchase
Price equal to 100% of the principal amount thereof plus interest accrued to
the Repurchase Date. At the option of the Company, the Repurchase Price may be
paid in cash or, subject to the conditions provided in the Indenture, by
delivery of shares of Common Stock having a fair market value equal to the
Repurchase Price. For purposes of this paragraph, the fair market value of
shares of Common Stock shall be determined by the Company and shall be equal to
95% of the average of the Closing Prices Per Share for the five consecutive
Trading Days ending on the third Trading Day immediately preceding the
Repurchase Date. Whenever in this Security there is a reference,



                                    -30-

<PAGE>   41



in any context, to the principal of any Security as of any time, such reference
shall be deemed to include reference to the Repurchase Price payable in respect
of such Security to the extent that such Repurchase Price is, was or would be
so payable at such time, and express mention of the Repurchase Price in any
provision of this Security shall not be construed as excluding the Repurchase
Price so payable in those provisions of this Security when such express mention
is not made; provided, however, that, for the purposes of the second succeeding
paragraph, such reference shall be deemed to include reference to the
Repurchase Price only to the extent the Repurchase Price is payable in cash.

         [THE FOLLOWING PARAGRAPH SHALL APPEAR IN EACH REGISTERED SECURITY THAT
IS NOT A GLOBAL SECURITY:

         In the event of redemption, repurchase or conversion of this Security
in part only, a new Registered Security or Registered Securities for the
unredeemed, unrepurchased or unconverted portion hereof will be issued in the
name of the Holder hereof.]

         [THE FOLLOWING PARAGRAPH SHALL APPEAR IN EACH GLOBAL SECURITY:

         In the event of a deposit or withdrawal of an interest in this
Security, including an exchange, transfer, redemption, repurchase or conversion
of this Security in part only, the Trustee, as custodian of the Depositary,
shall make an adjustment on its records to reflect such deposit or withdrawal
in accordance with the Applicable Procedures.]

         The indebtedness evidenced by this Security is, to the extent and in
the manner provided in the Indenture, subordinate and subject in right of
payment to the prior payment in full of all Senior Indebtedness of the Company,
and this Security is issued subject to such provisions of the Indenture with
respect thereto. Each Holder of this Security, by accepting the same, (a)
agrees to and shall be bound by such provisions, (b) authorizes and directs the
Trustee on his behalf to take such action as may be necessary or appropriate to
effectuate the subordination so provided and (c) appoints the Trustee his
attorney-in-fact for any and all such purposes.

         If an Event of Default shall occur and be continuing, the principal of
all the Securities, together with accrued interest to the date of declaration,
may be declared due and payable in the manner and with the effect provided in
the Indenture. Upon payment (i) of the amount of principal so declared due and
payable, together with accrued interest to the date of declaration, and (ii) of
interest on any overdue principal and, to the extent permitted by applicable
law, overdue interest, all of the Company's obligations in respect of the
payment of the principal of and interest on the Securities shall terminate.

         The Indenture permits, with certain exceptions as therein provided,
the amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with either (a) the written consent of
the Holders of a majority in principal amount of the Securities at



                                    -31-

<PAGE>   42



the time Outstanding, or (b) by the adoption of a resolution, at a meeting of
Holders of the Outstanding Securities at which a quorum is present, by the
Holders of (i) 66-2/3% in aggregate principal amount of the Outstanding
Securities represented and entitled to vote at such meeting or (ii) a majority
in principal amount of the Outstanding Securities. The Indenture also contains
provisions permitting the Holders of specified percentages in principal amount
of the Securities at the time Outstanding, on behalf of the Holders of all the
Securities, to waive compliance by the Company with certain provisions of the
Indenture and certain past defaults under the Indenture and their consequences.
Any such consent or waiver by the Holder of this Security shall be conclusive
and binding upon such Holder and upon all future Holders of this Security and
of any Security issued in exchange herefor or in lieu hereof, whether or not
notation of such consent or waiver is made upon this Security or such other
Security.

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

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

         As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of Registered Securities is registrable on the
Security Register upon surrender of a Registered Security for registration of
transfer at the Corporate Trust Office of the Trustee or at such other office
or agency of the Company as may be designated by it for such purpose in the
Borough of Manhattan, The City of New York, or at such other offices or
agencies as the Company may designate, duly endorsed by, or accompanied by a
written instrument of transfer in form satisfactory to the Company and the
Security Registrar duly executed by, the Holder thereof or his attorney duly
authorized in writing, and thereupon one or more new Registered Securities, of
authorized denominations and for the same aggregate principal amount, will be
issued to the designated transferee or transferees by the Registrar. No service
charge shall be



                                    -32-

<PAGE>   43



made for any such registration of transfer or exchange, but the Company may
require payment of a sum sufficient to recover any tax or other governmental
charge payable in connection therewith.

         Prior to due presentation of a Registered Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name such Registered Security is registered, as
the owner thereof for all purposes, whether or not such Security be overdue,
and neither the Company, the Trustee nor any such agent shall be affected by
notice to the contrary.

         THE INDENTURE AND THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, UNITED STATES OF AMERICA,
WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAWS.

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




                                    -33-

<PAGE>   44



                  ELECTION OF HOLDER TO REQUIRE REPURCHASE

     1. Pursuant to Section 14.1 of the Indenture, the undersigned hereby
elects to have this Security repurchased by the Company.

     2. The undersigned hereby directs the Trustee or the Company to pay it or
__________________ an amount in cash or, at the Company's election, Common
Stock valued as set forth in the Indenture, equal to 100% of the principal
amount to be repurchased (as set forth below), plus interest accrued to the
Repurchase Date, as provided in the Indenture.


                         Dated:
                               -----------------------


                               -----------------------
                                      Signature


                               -----------------------
                                Signature Guaranteed

Signatures must be guaranteed by an "eligible guarantor institution" meeting
the requirements of the [Registrar], which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or
such other "signature guarantee program" as may be determined by the
[Registrar] in addition to, or in substitution for, STAMP, all in accordance
with the Securities Exchange Act of 1934, as amended.

Principal amount to be repurchased
(an integral multiple of U.S.$1,000):                   ______________________

Remaining principal amount following such repurchase 
(not less than U.S.$5,000):                             ______________________

NOTICE: The signature to the foregoing Election must correspond to the Name as
written upon the face of this Security in every particular, without alteration
or any change whatsoever.




                                    -34-

<PAGE>   45



SECTION 2.3. Form of Certificate of Authentication.

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

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


                                    The Bank of New York
                                      as Trustee



                                    By:
                                       -------------------------------
                                          Authorized Signature

Dated:
      --------------


SECTION 2.4. Form of Conversion Notice.

                               CONVERSION NOTICE

         The undersigned Holder of this Security hereby irrevocably exercises
the option to convert this Security, or any portion of the principal amount
hereof (which is an integral multiple of U.S.$1,000, provided that the
unconverted portion of such principal amount is U.S.$1,000 or any integral
multiple of U.S.$1,000 in excess thereof) below designated, into shares of
Common Stock in accordance with the terms of the Indenture referred to in this
Security, and directs that such shares, together with a check in payment for
any fractional share and any Securities representing any unconverted principal
amount hereof, be delivered to and be registered in the name of the undersigned
unless a different name has been indicated below. If shares of Common Stock or
Securities are to be registered in the name of a Person other than the
undersigned, the undersigned will pay all transfer taxes payable with respect
thereto. Any amount required to be paid by the undersigned on account of
interest accompanies this Security.


Dated:
      --------------
                                        --------------------
                                              Signature




                                    -35-

<PAGE>   46




<TABLE>
<S>                                               <C> 
If shares or Registered Securities are to         If only a portion of the Securities
is to be be registered in the name of a Person    converted, please indicate:
other than the Holder, please print such
Person's name and address:
                                                  1.  Principal amount to be converted:

                                                  U.S.$___________
- -------------------------
         Name                                     2.  Principal amount and
                                                      denomination of Registered
                                                      Securities representing uncon
                                                      verted principal amount to be
- ---------------------------                           issued:
        Address

                                                  Amount:  U.S.$________

- ---------------------------                       Denominations:
Social Security or other Taxpayer                 U.S.$______
Identification                                    Number, if any 
                                                  (any integral multiple of 
                                                  U.S.$1,000, provided that the
                                                  unconverted portion of such
                                                  principal amount is U.S.
                                                  $1,000 or any integral 
                                                  multiple of U.S.$1,000 in
                                                  excess thereof)
</TABLE>

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


Signatures must be guaranteed by an "eligible guarantor institution" meeting
the requirements of the [Registrar], which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or
such other "signature guarantee program" as may be determined by the
[Registrar] in addition to, or in substitution for, STAMP, all in accordance
with the Securities Exchange Act of 1934, as amended.




                                    -36-

<PAGE>   47



                                 ARTICLE THREE

                                 THE SECURITIES


SECTION 3.1. Title and Terms.

         The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is limited to
U.S.$400,000,000, except for Securities authenticated and delivered in exchange
for, or in lieu of, other Securities pursuant to Section 3.4, 3.5, 3.6, 8.5,
11.8, 12.2 or 14.3(f).

         The Securities shall be known and designated as the "7% Convertible
Subordinated Notes due August 1, 2004" of the Company. Their Stated Maturity
shall be August 1, 2004 and they shall bear interest on their principal amount
from August 12, 1997, payable semi-annually in arrears on February 1 and August
1 in each year, commencing February 1, 1998, at the rate of 7% per annum until
the principal thereof is due and at the rate of 7% per annum on any overdue
principal and, to the extent permitted by law, on any overdue interest;
provided, however, that payments shall only be made on Business Days as
provided in Section 1.12.

         The principal of, premium, if any, and interest on the Securities
shall be payable as provided in the form of Securities set forth in Section
2.2, and the Repurchase Price, whether payable in cash or in shares of Common
Stock, shall be payable at such places as are identified in the Company Notice
given pursuant to Section 14.3 (any city in which any Paying Agent is located
being herein called a "Place of Payment").

         The Registrable Securities are entitled to the benefits of a
Registration Rights Agreement as provided by Sections 2.2 and 10.12. The
Securities are entitled to the payment of Liquidated Damages and additional
interest as provided by Section 10.12.

         The Securities shall be redeemable at the option of the Company at any
time on or after August 1, 2000, in whole or in part, as provided in Article
Eleven and in the form of Securities set forth in Section 2.2.

         The Securities shall be convertible as provided in Article Twelve (any
city in which any Conversion Agent is located being herein called a "Place of
Conversion").

         The Securities shall be subordinated in right of payment to Senior
Indebtedness of the Company as provided in Article Thirteen.

         The Securities shall be subject to repurchase by the Company at the
option of the Holders as provided in Article Fourteen.




                                    -37-

<PAGE>   48



SECTION 3.2. Denominations.

         The Securities shall be issuable only in registered form, without
coupons, in denominations of U.S.$1,000 and integral multiples of U.S.$1,000 in
excess thereof.

SECTION 3.3. Execution, Authentication, Delivery and Dating.

         The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its Chief Executive
Officer, its President, its Chief Financial Officer or one of its Vice
Presidents. Any such signature may be manual or facsimile.

         Securities bearing the manual or facsimile signature of individuals
who were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

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

         Each Security shall be dated the date of its authentication.

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

SECTION 3.4. Global Securities.

         (a) Each Global Security authenticated under this Indenture shall be
registered in the name of the Depositary designated by the Company for such
Global Security or a nominee thereof and delivered to such Depositary or a
nominee thereof or custodian therefor, and each such Global Security shall
constitute a single Security for all purposes of this Indenture.

         (b) Notwithstanding any other provision in this Indenture, no Global
Security may be exchanged in whole or in part for Securities registered, and no
transfer of a Global Security in whole or in part may be registered, in the
name of any Person other than the Depositary for such Global Security or a
nominee thereof unless (i) such Depositary (A) has notified the Company that it
is unwilling or unable to continue as Depositary for such Global Security or
(B) has ceased to be a clearing agency registered as such under the Exchange
Act or announces an intention



                                    -38-

<PAGE>   49



permanently to cease business or does in fact do so or (ii) there shall have
occurred and be continuing an Event of Default with respect to such Global
Security.

         (c) If any Global Security is to be exchanged for other Securities or
canceled in whole, it shall be surrendered by or on behalf of the Depositary or
its nominee to the Trustee, as Security Registrar, for exchange or
cancellation, as provided in this Article Three. If any Global Security is to
be exchanged for other Securities or canceled in part, or if another Security
is to be exchanged in whole or in part for a beneficial interest in any Global
Security, in each case, as provided in Section 3.5, then either (i) such Global
Security shall be so surrendered for exchange or cancellation, as provided in
this Article Three, or (ii) the principal amount thereof shall be reduced or
increased by an amount equal to the portion thereof to be so exchanged or
canceled, or equal to the principal amount of such other Security to be so
exchanged for a beneficial interest therein, as the case may be, by means of an
appropriate adjustment made on the records of the Trustee, as Security
Registrar, whereupon the Trustee, in accordance with the Applicable Procedures,
shall instruct the Depositary or its authorized representative to make a
corresponding adjustment to its records. Upon any such surrender or adjustment
of a Global Security, the Trustee shall, subject to Section 3.5(c) and as
otherwise provided in this Article Three, authen ticate and deliver any
Securities issuable in exchange for such Global Security (or any portion
thereof) to or upon the order of, and registered in such names as may be
directed by, the Depositary or its authorized representative. Upon the request
of the Trustee in connection with the occurrence of any of the events specified
in the preceding paragraph, the Company shall promptly make available to the
Trustee a reasonable supply of Securities that are not in the form of Global
Securities. The Trustee shall be entitled to rely upon any order, direction or
request of the Depositary or its authorized representative which is given or
made pursuant to this Article Three if such order, direction or request is
given or made in accordance with the Applicable Procedures.

         (d) Every Security authenticated and delivered upon registration of
transfer of, or in exchange for or in lieu of, a Global Security or any portion
thereof, whether pursuant to this Article Three or otherwise, shall be
authenticated and delivered in the form of, and shall be, a registered Global
Security, unless such Security is registered in the name of a Person other than
the Depositary for such Global Security or a nominee thereof, in which case
such Registered Security shall be authenticated and delivered in definitive,
fully registered form, without interest coupons.

         (e) The Depositary or its nominee, as registered owner of a Global
Security, shall be the Holder of such Global Security for all purposes under
the Indenture and the Registered Securities, and owners of beneficial interests
in a Global Security shall hold such interests pursuant to the Applicable
Procedures. Accordingly, any such owner's beneficial interest in a Global
Security will be shown only on, and the transfer of such interest shall be
effected only through, records maintained by the Depositary or its nominee or
its Agent Members and such owners of beneficial interests in a Global Security
will not be considered the owners or holders thereof.




                                    -39-

<PAGE>   50



SECTION 3.5. Registration, Registration of Transfer and Exchange; Restrictions
on Transfer.

         (a) The Company shall cause to be kept at the Corporate Trust Office
of the Trustee a register (the register maintained in such office and in any
other office or agency of the Company designated pursuant to Section 10.2 being
herein sometimes collectively referred to as the "Security Register") in which,
subject to such reasonable regulations as it may prescribe, the Company shall
provide for the registration of Registered Securities and of transfers of
Registered Securities. The Trustee is hereby appointed "Security Registrar" for
the purpose of registering Registered Securities and transfers and exchanges of
Registered Securities as herein provided.

         Upon surrender for registration of transfer of any Security at an
office or agency of the Company designated pursuant to Section 10.2 for such
purpose, the Company shall execute, and the Trustee shall authenticate and make
available for delivery, in the name of the designated transferee or
transferees, one or more new Securities of any authorized denominations and of
a like aggregate principal amount and bearing such restrictive legends as may
be required by this Indenture.

         At the option of the Holder, and subject to the other provisions of
this Section 3.5, Securities may be exchanged for other Securities of any
authorized denomination and of a like aggregate principal amount, upon
surrender of the Securities to be exchanged at any such office or agency.
Whenever any Securities are so surrendered for exchange, and subject to the
other provisions of this Section 3.5, the Company shall execute, and the
Trustee shall authenticate and make available for delivery, the Securities
which the Holder making the exchange is entitled to receive. Every Security
presented or surrendered for registration of transfer or for exchange shall (if
so required by the Company or the Security Registrar) be duly endorsed, or be
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed, by the Holder thereof or his
attorney duly authorized in writing.

         All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, and subject to the other provisions of this Section 3.5, entitled to the
same benefits under this Indenture, as the Securities surrendered upon such
registration of transfer or exchange.

         No service charge shall be made for any registration of transfer or
exchange of Securities except as provided in Section 3.6, but the Company may
require payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in connection with any registration of transfer or
exchange of Securities, other than exchanges pursuant to Section 3.4, 8.5,
11.8, 12.2 or 14.3 (other than where the shares of Common Stock are to be
issued or delivered in a name other than that of the Holder of the Security)
not involving any transfer and other than any stamp and other duties, if any,
which may be imposed in connection with any such transfer or exchange by the
United States or any political subdivision thereof or therein, which shall be
paid by the Company.




                                    -40-

<PAGE>   51



         In the event of a redemption of the Securities, the Company will not
be required (a) to register the transfer of or exchange Securities for a period
of 15 days immediately preceding the date notice is given identifying the
serial numbers of the Securities called for such redemption or (b) to register
the transfer of or exchange any Security, or portion thereof, called for
redemption.

         (b) Certain Transfers and Exchanges. Notwithstanding any other
provision of this Indenture or the Securities, transfers and exchanges of
Securities and beneficial interests in a Global Security of the kinds specified
in this Section 3.5(b) shall be made only in accordance with this Section
3.5(b).

         (i) Restricted Global Security to Regulation S Global Security. If
     the owner of a beneficial interest in the Restricted Global Security
     wishes at any time to transfer such interest to a Person who wishes to
     acquire the same in the form of a beneficial interest in the Regulation S
     Global Security, such transfer may be effected only in accordance with the
     provisions of this Clause (b)(i) and Clause (b)(v) below and subject to
     the Applicable Procedures. Upon receipt by the Trustee, as Security
     Registrar, of (A) an order given by the Depositary or its authorized
     representative directing that a beneficial interest in the Regulation S
     Global Security in a specified principal amount be credited to a specified
     Agent Member's account and that a beneficial interest in the Restricted
     Global Security in an equal principal amount be debited from another
     specified Agent Member's account and (B) a Regulation S Certificate,
     satisfactory to the Trustee and duly executed by the owner of such
     beneficial interest in the Restricted Global Security or his attorney duly
     authorized in writing, then the Trustee, as Security Registrar but subject
     to Clause (b)(v) below, shall reduce the principal amount of the
     Restricted Global Security and increase the principal amount of the
     Regulation S Global Security by such specified principal amount as
     provided in Section 3.4(A)(c).

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



                                    -41-

<PAGE>   52



     the Restricted Global Security by such specified principal amount as
     provided in Section 3.4(A)(c).

         (iii) Restricted Non-Global Security to Restricted Global Security or
     Regulation S Global Security. If the Holder of a Restricted Security
     (other than a Global Security) wishes at any time to transfer all or any
     portion of such Restricted Security to a Person who wishes to take
     delivery thereof in the form of a beneficial interest in the Restricted
     Global Security or the Regulation S Global Security, such transfer may be
     effected only in accordance with the provisions of this Clause (b)(iii)
     and Clause (b)(v) below and subject to the Applicable Procedures. Upon
     receipt by the Trustee, as Security Registrar, of (A) such Restricted
     Security as provided in Section 3.5(a) and instructions satisfactory to
     the Trustee directing that a beneficial interest in the Restricted Global
     Security or Regulation S Global Security in a specified principal amount
     not greater than the principal amount of such Security be credited to a
     specified Agent Member's account and (B) a Restricted Securities
     Certificate, if the specified account is to be credited with a beneficial
     interest in the Restricted Global Security, or a Regulation S Certificate,
     if the specified account is to be credited with a beneficial interest in
     the Regulation S Global Security, in either case satisfactory to the
     Trustee and duly executed by such Holder or his attorney duly authorized
     in writing, then the Trustee, as Security Registrar but subject to Clause
     (b)(v) below, shall cancel such Restricted Security (and issue a new
     Restricted Security in respect of any untransferred portion thereof) as
     provided in Section 3.5(a) and increase the principal amount of the
     Restricted Global Security or the Regulation S Global Security, as the
     case may be, by the specified principal amount as provided in Section
     3.4(c).

         (iv) Exchanges between Global Security and Non-Global Security. A
     beneficial interest in a Global Security may be exchanged for a Security
     that is not a Global Security as provided in Section 3.4, provided that,
     if such interest is a beneficial interest in the Restricted Global
     Security, or if such interest is a beneficial interest in the Regulation S
     Global Security and such exchange is to occur during the Restricted
     Period, then such interest shall be exchanged for a Restricted Security
     (subject in each case to Section 3.5(c)). A Security that is not a Global
     Security may be exchanged for a beneficial interest in a Global Security
     only if (A) such exchange occurs in connection with a transfer effected in
     accordance with Clause (b)(iii) above.

         (v) Regulation S Global Security to be Held Through Euroclear or
     CEDEL during Restricted Period. The Company shall use its best efforts to
     cause the Depositary to ensure that, until the expiration of the
     Restricted Period, beneficial interests in the Regulation S Global
     Security may be held only in or through accounts maintained at the
     Depositary by Euroclear or CEDEL (or by Agent Members acting for the
     account thereof), and no person shall be entitled to effect any transfer
     or exchange that would result in any such interest being held otherwise
     than in or through such an account; provided that this Clause (b)(v) shall
     not prohibit any transfer or exchange of such an interest in accordance
     with Clause (b)(ii) or (iv) above.



                                    -42-

<PAGE>   53



         (c) Securities Act Legends. Rule 144A Securities, Regulation D
Securities and their respective Successor Securities shall bear the applicable
Restricted Securities Legend, and the Regulation S Securities and their
Successor Securities shall bear a Regulation S Legend, subject to the
following:

         (i) subject to the following Clauses of this Section 3.5(c), a
     Security or any portion thereof which is exchanged, upon transfer or
     otherwise, for a Global Security or any portion thereof shall bear the
     Securities Act Legend borne by such Global Security while represented
     thereby;

         (ii) subject to the following Clauses of this Section 3.5(c), a new
     Security which is not a Global Security and is issued in exchange for
     another Security (including a Global Security) or any portion thereof,
     upon transfer or otherwise, shall bear the Securities Act Legend borne by
     such other Security, provided that, if such new Security is required
     pursuant to Section 3.5(b)(iv) to be issued in the form of a Restricted
     Security, it shall bear a Restricted Securities Legend and, if such new
     Security is so required to be issued in the form of a Regulation S
     Security, it shall bear a Regulation S Legend;

         (iii) any Securities which are sold or otherwise disposed of pursuant
     to an effective registration statement under the Securities Act (including
     the Shelf Registration Statement), together with their Successor
     Securities shall not bear a Securities Act Legend; the Company shall
     inform the Trustee in writing of the effective date of any such
     registration statement registering the Securities under the Securities Act
     and shall notify the Trustee at any time when prospectuses may not be
     delivered with respect to Securities to be sold pursuant to such
     registration statement. The Trustee shall not be liable for any action
     taken or omitted to be taken by it in good faith in accordance with the
     aforementioned registration statement;

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

         (v) a new Security which does not bear a Securities Act Legend may be
     issued in exchange for or in lieu of a Security (other than a Global
     Security) or any portion thereof which bears such a legend if, in the
     Company's judgment, placing such a legend upon such new Security is not
     necessary to ensure compliance with the registration



                                    -43-

<PAGE>   54



     requirements of the Securities Act, and the Trustee, at the direction of
     the Company, shall authenticate and deliver such a new Security as
     provided in this Article Three; and

         (vi) notwithstanding the foregoing provisions of this Section 3.5(c),
     a Successor Security of a Security that does not bear a particular form of
     Securities Act Legend shall not bear such form of legend unless the
     Company has reasonable cause to believe that such Successor Security is a
     "restricted security" within the meaning of Rule 144, in which case the
     Trustee, at the direction of the Company, shall authenticate and deliver a
     new Security bearing a Restricted Securities Legend in exchange for such
     Successor Security as provided in this Article Three.

         (d) Neither the Trustee, the Paying Agent nor any of their agents
shall (1) have any duty to monitor compliance with or with respect to any
federal or state or other securities or tax laws or (2) have any duty to obtain
documentation on any transfers or exchanges other than as specifically required
hereunder.

SECTION 3.6. Mutilated, Destroyed, Lost or Stolen Securities.

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

         If there be delivered to the Company and to the Trustee:

         (1) evidence to their satisfaction of the destruction, loss or theft
     of any Security, and

         (2) such security or indemnity as may be satisfactory to the Company
     and the Trustee to save each of them and any agent of either of them
     harmless,

then, in the absence of actual notice to the Company or the Trustee that such
Security has been acquired by a bona fide purchaser, the Company shall execute
and the Trustee shall authenticate and deliver, in lieu of any such destroyed,
lost or stolen Security, a new Security of like tenor and principal amount and
bearing a number not contemporaneously outstanding.

         In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, the Company in its discretion,
but subject to any conversion rights, may, instead of issuing a new Security,
pay such Security, upon satisfaction of the conditions set forth in the
preceding paragraph.

         Upon the issuance of any new Security under this Section 3.6, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may



                                    -44-

<PAGE>   55



be imposed in relation thereto (other than any stamp and other duties, if any,
which may be imposed in connection therewith by the United States or any
political subdivision thereof or therein, which shall be paid by the Company)
and any other expenses (including the fees and expenses of the Trustee)
connected therewith.

         Every new Security issued pursuant to this Section 3.6 in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the mutilated,
destroyed, lost or stolen Security shall be at any time enforceable by anyone,
and such new Security shall be entitled to all the benefits of this Indenture
equally and proportionately with any and all other Securities duly issued
hereunder.

         The provisions of this Section 3.6 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies of any Holder with respect
to the replacement or payment of mutilated, destroyed, lost or stolen
Securities.

SECTION 3.7. Payment of Interest; Interest Rights Preserved.

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

         Any interest on any Security which is payable, but is not punctually
paid or duly provided for, on any Interest Payment Date (herein called
"Defaulted Interest") shall forthwith cease to be payable to the Holder on the
relevant Regular Record Date by virtue of having been such Holder, and such
Defaulted Interest may be paid by the Company, at its election in each case, as
provided in Clause (1) or (2) below:

         (1) The Company may elect to make payment of any Defaulted Interest
     to the Persons in whose names the Securities (or their respective
     Predecessor Securities) are registered at the close of business on a
     Special Record Date for the payment of such Defaulted Interest, which
     shall be fixed in the following manner. The Company shall notify the
     Trustee in writing of the amount of Defaulted Interest proposed to be paid
     on each Security, the date of the proposed payment and the Special Record
     Date, and at the same time the Company shall deposit with the Trustee an
     amount of money equal to the aggregate amount proposed to be paid in
     respect of such Defaulted Interest or shall make arrangements satisfactory
     to the Trustee for such deposit prior to the date of the proposed payment,
     such money when deposited to be held in trust for the benefit of the
     Persons entitled to such Defaulted Interest as in this Clause provided.
     The Special Record Date for the payment of such Defaulted Interest shall
     be not more than 15 days and not less than 10 days prior to the date of
     the proposed payment and not less than 10 days after the receipt by the
     Trustee of the notice of the proposed payment. The Trustee, in the name
     and at the expense of the Company, shall cause notice of the proposed
     payment of such Defaulted



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<PAGE>   56



     Interest and the Special Record Date therefor to be mailed, first-class
     postage prepaid, to each Holder at such Holder's address as it appears in
     the Security Register, not less than 10 days prior to such Special Record
     Date. Notice of the proposed payment of such Defaulted Interest and the
     Special Record Date therefor having been so mailed, such Defaulted
     Interest shall be paid to the Persons in whose names the Securities (or
     their respective Predecessor Securities) are registered at the close of
     business on such Special Record Date and shall no longer be payable
     pursuant to the following Clause (2).

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

         Subject to the foregoing provisions of this Section and Section 3.5,
each Security delivered under this Indenture upon registration of transfer of
or in exchange for or in lieu of any other Security shall carry the rights to
interest accrued and unpaid, and to accrue, which were carried by such other
Security.

         Interest on any Security which is converted in accordance with Section
12.2 during a Record Date Period shall be payable in accordance with the
provisions of Section 12.2.

SECTION 3.8. Persons Deemed Owners.

         Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name such Security is registered as the owner of such
Security for the purpose of receiving payment of principal of, premium, if any,
and (subject to Section 3.7) interest on such Security and for all other
purposes whatsoever, whether or not such Security be overdue, and neither the
Company, the Trustee nor any agent of the Company or the Trustee shall be
affected by notice to the contrary.

SECTION 3.9. Cancellation.

         All Securities surrendered for payment, redemption, repurchase,
registration of transfer or exchange or conversion shall, if surrendered to any
Person other than the Trustee, be delivered to the Trustee. All Securities so
delivered to the Trustee shall be canceled promptly by the Trustee. No
Securities shall be authenticated in lieu of or in exchange for any Securities
canceled as provided in this Section 3.9. The Trustee shall return all canceled
Securities to the Company.




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<PAGE>   57



SECTION 3.10. Computation of Interest.

         Interest on the Securities (including any Liquidated Damages and
additional interest) shall be computed on the basis of a 360-day year of twelve
30-day months.

SECTION 3.11. [Reserved].

SECTION 3.12. CUSIP Numbers.

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




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<PAGE>   58



                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE


SECTION 4.1. Satisfaction and Discharge of Indenture.

         This Indenture shall upon Company Request cease to be of further
effect (except as to any surviving rights of conversion, or registration of
transfer or exchange, or replacement of Securities herein expressly provided
for and any right to receive Liquidated Damages as provided in the form of
Securities set forth in Section 2.2 and the Company's obligations to the
Trustee pursuant to Section 6.7), and the Trustee, at the expense of the
Company, shall execute proper instruments in form and substance satisfactory to
the Trustee acknowledging satisfaction and discharge of this Indenture, when

          (1) either

               (A) all Securities theretofore authenticated and delivered
          (other than (i) Securities which have been destroyed, lost or stolen
          and which have been replaced or paid as provided in Section 3.6 and
          (ii) Securities for whose payment money has theretofore been
          deposited in trust or segregated and held in trust by the Company and
          thereafter repaid to the Company or discharged from such trust, as
          provided in Section 10.3) have been delivered to the Trustee for
          cancellation; or

               (B) all such Securities not theretofore delivered to the Trustee
          or its agent for cancellation (other than Securities referred to in
          clauses (i) and (ii) of clause (1)(A) above)

                    (i) have become due and payable, or

                    (ii) will have become due and payable at their Stated
          Maturity within one year, or

                    (iii) are to be called for redemption within one year under
          arrangements satisfactory to the Trustee for the giving of notice of 
          redemption by the Trustee in the name, and at the expense, of the 
          Company,

          and the Company, in the case of clause (i), (ii) or (iii) above, has
          deposited or caused to be deposited with the Trustee as trust funds
          (immediately available to the Holders in the case of clause (i)) in
          trust for the purpose an amount sufficient to pay and discharge the
          entire indebtedness on such Securities not theretofore delivered to
          the Trustee for cancellation, for principal, premium, if any, and
          interest (including any Liquidated Damages) to the date of such
          deposit (in the case



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<PAGE>   59



          of Securities which have become due and payable) or to the Stated
          Maturity or Redemption Date, as the case may be;

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

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

         Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 6.7, the obligations of
the Company to any Authenticating Agent under Section 6.12, the obligation of
the Company to pay Liquidated Damages, if money shall have been deposited with
the Trustee pursuant to clause (1)(B) of this Section 4.1, the obligations of
the Trustee under Section 4.2 and the last paragraph of Section 10.3 and the
obligations of the Company and the Trustee under Section 3.5 and Article Twelve
shall survive. Funds held in trust pursuant to this Section are not subject to
the provisions of Article Thirteen.

SECTION 4.2. Application of Trust Money.

         Subject to the provisions of the last paragraph of Section 10.3, all
money deposited with the Trustee pursuant to Section 4.1 shall be held in trust
and applied by it, in accordance with the provisions of the Securities and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent), to the Persons entitled
thereto, of the principal, premium, if any, and interest for whose payment such
money has been deposited with the Trustee.

         All monies deposited with the Trustee pursuant to Section 4.1 (and
held by it or any Paying Agent) for the payment of Securities subsequently
converted shall be returned to the Company upon Company Request.



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<PAGE>   60



                                  ARTICLE FIVE

                                    REMEDIES


SECTION 5.1. Events of Default.

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

          (1) default in the payment of the principal of or premium, if any, on
     any Security at its Maturity; or

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

          (3) default in the performance, or breach, of any covenant or
     warranty of the Company in this Indenture (other than a covenant or
     warranty a default in the performance or breach of which is specifically
     dealt with elsewhere in this Section), and continuance of such default or
     breach for a period of 60 days after there has been given, by registered
     or certified mail, to the Company by the Trustee or to the Company and the
     Trustee by the Holders of at least 10% in principal amount of the
     Outstanding Securities a written notice specifying such default or breach
     and requiring it to be remedied and stating that such notice is a "Notice
     of Default" hereunder; or

          (4) a default under any bond, debenture, note or other evidence of
     indebtedness for money borrowed by the Company or under any mortgage,
     indenture or instrument under which there may be issued or by which there
     may be secured or evidenced any indebtedness for money borrowed by the
     Company with a principal amount then outstanding in excess of
     U.S.$20,000,000, whether such indebtedness now exists or shall hereafter
     be created, which default shall have resulted in such indebtedness
     becoming or being declared due and payable prior to the date on which it
     would otherwise have become due and payable, without such indebtedness
     having been discharged, or such acceleration having been rescinded or
     annulled, within a period of 30 days after there shall have been given, by
     registered or certified mail, to the Company by the Trustee or to the
     Company and the Trustee by the Holders of at least 10% in principal amount
     of the Outstanding Securities a written notice specifying such default and
     requiring the Company to cause such indebtedness to be discharged or cause
     such default to be cured or waived or such



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<PAGE>   61



     acceleration to be rescinded or annulled and stating that such notice is a
     "Notice of Default" hereunder; or

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

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

SECTION 5.2. Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default (other than an Event of Default specified in
Section 5.1(5) or 5.1(6)) occurs and is continuing, then in every such case the
Trustee or the Holders of not less than 25% in principal amount of the
Outstanding Securities may, subject to the provisions of Article Thirteen,
declare the principal of all the Securities to be due and payable immediately,
by a notice in writing to the Company (and to the Trustee if given by the
Holders), and upon any such declaration such principal and all accrued interest
thereon shall become immediately due and payable. If an Event of Default
specified in Section 5.1(5) or 5.1(6) occurs, the principal of, and accrued
interest on, all the Securities shall, subject to the provisions of Article
Thirteen, ipso facto become immediately due and payable without any declaration
or other Act of the Holder or any act on the part of the Trustee.




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<PAGE>   62



         At any time after such declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter in this Article Five provided, the Holders of a
majority in principal amount of the Outstanding Securities, by written notice
to the Company and the Trustee, may rescind and annul such declaration and its
consequences if

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

              (A) all overdue interest on all Securities,

              (B) the principal of and premium, if any, on any Securities
          which have become due otherwise than by such declaration of
          acceleration and any interest thereon at the rate borne by the
          Securities,

              (C) to the extent permitted by applicable law, interest upon
          overdue interest at a rate of 7% per annum, and

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

     and

         (2) all Events of Default, other than the nonpayment of the principal
     of, and any premium and interest on, Securities which have become due
     solely by such declaration of acceleration, have been cured or waived as
     provided in Section 5.13.

         No rescission or annulment referred to above shall affect any
subsequent default or impair any right consequent thereon.

SECTION 5.3. Collection of Indebtedness and Suits for Enforcement by Trustee.

         The Company covenants that if

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

         (2) default is made in the payment of the principal of or premium, if
     any, on any Security at the Maturity thereof,

the Company will, upon demand of the Trustee but subject to the provisions of
Article Thirteen, pay to it, for the benefit of the Holders of such Securities
the whole amount then due and payable



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<PAGE>   63



on such Securities for principal and interest (including any Liquidated
Damages) and interest on any overdue principal and premium, if any, and, to the
extent permitted by applicable law, on any overdue interest (including any
Liquidated Damages), at a rate of 7% per annum, and in addition thereto, such
further amount as shall be sufficient to cover the reasonable costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

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

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

SECTION 5.4. Trustee May File Proofs of Claim.

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

         (1) to file and prove a claim for the whole amount of principal,
     premium, if any, and interest owing and unpaid in respect of the
     Securities and take such other actions, including participating as a
     member, voting or otherwise, of any official committee of creditors
     appointed in such matter, and to file such other papers or documents, in
     each of the foregoing cases, 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 of the Holders of Securities allowed in such
     judicial proceeding, and

         (2) to collect and receive any monies or other property payable or
     deliverable on any such claim and to distribute the same;



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<PAGE>   64



     and any custodian, receiver, assignee, trustee, liquidator, sequestrator
     or other similar official in any such judicial proceeding is hereby
     authorized by each Holder of Securities 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 of Securities to pay to the Trustee
     any amount due to it for the reasonable compensation, expenses,
     disbursements and advances of the Trustee, its agents and counsel and any
     other amounts due the Trustee under Section 6.7.

         Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a
Security any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder thereof or to authorize
the Trustee to vote in respect of the claim of any Holder of a Security in any
such proceeding; provided, however, that the Trustee may, on behalf of such
Holders, vote for the election of a trustee in bankruptcy or similar official.

SECTION 5.5. Trustee May Enforce Claims Without Possession of Securities.

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

SECTION 5.6. Application of Money Collected.

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

         FIRST: To the payment of all amounts due the Trustee under Section
     6.7;

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

         THIRD: Any remaining amounts shall be repaid to the Company.




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<PAGE>   65



SECTION 5.7. Limitation on Suits.

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

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

         (2) the Holders of not less than 25% in principal amount of the
     Outstanding Securities shall have made written request to the Trustee to
     institute proceedings in respect of such Event of Default in its own name
     as Trustee hereunder;

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

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

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

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

SECTION 5.8. Unconditional Right of Holders to Receive Principal, Premium and
             Interest and to Convert.

         Notwithstanding any other provision in this Indenture, but subject to
the provisions of Article Thirteen, the Holder of any Security shall have the
right, which is absolute and unconditional, to receive payment of the principal
of, premium, if any, and (subject to Section 3.7) interest on such Security on
the respective Stated Maturities expressed in such Security (or, in the case of
redemption or repurchase, on the Redemption Date or Repurchase Date, as the
case may be), and to convert such Security in accordance with Article Twelve,
and to institute suit for the enforcement of any such payment and right to
convert, and such rights shall not be impaired without the consent of such
Holder.




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<PAGE>   66



SECTION 5.9. Restoration of Rights and Remedies.

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

SECTION 5.10. Rights and Remedies Cumulative.

         Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities in the last
paragraph of Section 3.6, no right or remedy herein conferred upon or reserved
to the Trustee or to the Holders of Securities is intended to be exclusive of
any other right or remedy, and every right and remedy shall, to the extent
permitted by law, be cumulative and in addition to every other right and remedy
given hereunder or now or hereafter existing at law or in equity or otherwise.
The assertion or employment of any right or remedy hereunder, or otherwise,
shall not prevent the concurrent assertion or employment of any other
appropriate right or remedy.

SECTION 5.11. Delay or Omission Not Waiver.

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

SECTION 5.12. Control by Holders of Securities.

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

         (1) such direction shall not be in conflict with any rule of law or
     with this Indenture, and

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




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<PAGE>   67



SECTION 5.13. Waiver of Past Defaults.

         The Holders, either (a) through the written consent of not less than a
majority in principal amount of the Outstanding Securities, or (b) by the
adoption of a resolution, at a meeting of Holders of the Outstanding Securities
at which a quorum is present, by the Holders of (i) at least 66-2/3% in
principal amount of the Outstanding Securities represented at such meeting or
(ii) a majority in principal amount of the Outstanding Securities, may on
behalf of the Holders of all the Securities waive any past default hereunder
and its consequences, except a default (1) in the payment of the principal of,
premium, if any, or interest on any Security (including any Liquidated
Damages), or (2) in respect of a covenant or provision hereof which under
Article Eight cannot be modified or amended without the consent of the Holder
of each Outstanding Security affected.

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

SECTION 5.14. Undertaking for Costs.

         All parties to this Indenture agree, and each Holder of any Security
by his acceptance thereof shall be deemed to have agreed, that any court may in
its discretion require, 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,
suffered or omitted by it as Trustee, the filing by any party litigant in such
suit of an undertaking to pay the costs of such suit, and that such court may
in its discretion assess reasonable costs, including reasonable attorneys'
fees, against any party litigant in such suit, having due regard to the merits
and good faith of the claims or defenses made by such party litigant; but the
provisions of this Section 5.14 shall not apply to any suit instituted by the
Company, to any suit instituted by the Trustee, to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 10% in
principal amount of the Outstanding Securities, or to any suit instituted by
any Holder of any Security for the enforcement of the payment of the principal
of, premium, if any, or interest on any Security on or after the respective
Stated Maturity or Maturities expressed in such Security (or, in the case of
redemption or repurchase, on or after the Redemption Date or Repurchase Date,
as the case may be) or for the enforcement of the right to convert any Security
in accordance with Article Twelve.

SECTION 5.15. Waiver of Stay, Usury or Extension Laws.

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



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<PAGE>   68



Liquidated Damages and the other additional interest contemplated by Section
10.12 are a reasonable estimate of the economic harm that would be suffered by
Holders of Securities as a result of the Company's failure to comply with its
obligations as set forth in The Registration Rights Agreement and do not
constitute a penalty. The Company further agrees, to the extent permitted by
law, to waive, and not assert, any claim that the Liquidated Damages or other
additional interest is a penalty.



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<PAGE>   69



                                  ARTICLE SIX

                                  THE TRUSTEE


SECTION 6.1. Certain Duties and Responsibilities.

         (a) The duties and responsibilities of the Trustee shall be as
provided by this Indenture and the Trust Indenture Act.

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

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

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

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

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

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

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




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<PAGE>   70



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

         (4) no provision of this Indenture shall require the Trustee to
     expend or risk its own funds or otherwise incur any financial liability in
     the performance of any of its duties hereunder, or in the exercise of any
     of its rights or powers, if it shall have reasonable grounds for believing
     that repayment of such funds or adequate indemnity against such risk or
     liability is not reasonably assured to it.

         (e) Whether or not therein expressly so provided, every provision of
this Indenture relating to the conduct or affecting the liability of or
affording protection to the Trustee shall be subject to the provisions of this
Section.

SECTION 6.2. Notice of Defaults.

         Within 90 days after the occurrence of any default hereunder as to
which the Trustee has received written notice, the Trustee shall give to all
Holders of Securities, in the manner provided in Section 1.6, notice of such
default, unless such default shall have been cured or waived; provided,
however, that, except in the case of a default in the payment of the principal
of, premium, if any, or interest on any Security the Trustee shall be protected
in withholding such notice if and so long as the board of directors, the
executive committee or a trust committee of directors or Responsible Officers
of the Trustee in good faith determine that the withholding of such notice is
in the interest of the Holders; and provided, further, that in the case of any
default of the character specified in Section 5.1(3), no such notice to Holders
of Securities shall be given until at least 30 days after the occurrence
thereof. For the purpose of this Section, the term "default" means any event
which is, or after notice or lapse of time or both would become, an Event of
Default.

SECTION 6.3. Certain Rights of Trustee.

         Subject to the provisions of Section 6.1:

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




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

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

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

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

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

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

         (8) the permissive right of the Trustee to take or refrain from
     taking any actions enumerated in this Indenture shall not be construed as
     a duty and the Trustee shall not be answerable in such actions other than
     for its own negligence or willful misconduct; and

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




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SECTION 6.4. Not Responsible for Recitals or Issuance of Securities.

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

SECTION 6.5. May Hold Securities, Act as Trustee Under Other Indentures.

         The Trustee, any Authenticating Agent, any Paying Agent, any
Conversion Agent or any other agent of the Company or the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
and may otherwise deal with the Company with the same rights it would have if
it were not Trustee, Authenticating Agent, Paying Agent, Conversion Agent or
such other agent.

         The Trustee may become and act as trustee under other indentures under
which other securities, or certificates of interest or participation in other
securities, of the Company are outstanding in the same manner as if it were not
Trustee hereunder.

SECTION 6.6. Money Held in Trust.

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

SECTION 6.7. Compensation and Reimbursement.

         The Company agrees

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

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




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

         When the Trustee incurs expenses or renders services in connection
with an Event of Default specified in Section 5.1(5) or Section 5.1(6), the
expenses (including the reasonable charges of its counsel) and the compensation
for the services are intended to constitute expenses of the administration
under any applicable Federal or state bankruptcy, insolvency or other similar
law.

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

SECTION 6.8. Corporate Trustee Required; Eligibility.

         There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such,
having a combined capital and surplus of at least U.S.$10,000,000 in the case
of the initial Trustee hereunder and US$50,000,000 in the case of any successor
Trustee, subject to supervision or examination by federal or state authority,
in good standing and having an established place of business in the Borough of
Manhattan, The City of New York. If such corporation publishes reports of
condition at least annually, pursuant to law or to the requirements of said
supervising or examining authority, then for the purposes of this Section, the
combined capital and surplus of such corporation shall be deemed to be its
combined capital and surplus as set forth in its most recent report of
condition so published. If at any time the Trustee shall cease to be eligible
in accordance with the provisions of this Section, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article and a
successor shall be appointed pursuant to Section 6.9.

SECTION 6.9. Resignation and Removal; Appointment of Successor.

         (a) No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 6.10.

         (b) The Trustee may resign at any time by giving written notice
thereof to the Company. If the instrument of acceptance by a successor Trustee
required by Section 6.10 shall not have been delivered to the Trustee within 30
days after the giving of such notice of resignation, the resigning Trustee may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.



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         (c) The Trustee may be removed at any time by Act of the Holders of a
majority in principal amount of the Outstanding Securities, delivered to the
Trustee and the Company. If the instrument of acceptance by a successor Trustee
required by Section 6.10 shall not have been delivered to the Trustee within 30
days after the giving of such notice of removal, the removed Trustee may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

         (d) If at any time:

         (1) the Trustee shall cease to be eligible under Section 6.8 and
     shall fail to resign after written request therefor by the Company or by
     any Holder of a Security who has been a bona fide Holder of a Security for
     at least six months, or

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

then, in any such case (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 5.14, any Holder of a Security who has been
a bona fide Holder of a Security for at least six months may, on behalf of
himself and all others similarly situated, petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee.

         (e) If the Trustee shall resign, be removed or become incapable of
acting, or if a vacancy shall occur in the office of Trustee for any cause, the
Company, by a Board Resolution, shall promptly appoint a successor Trustee and
shall comply with the applicable requirements of this Section and Section 6.10.
If, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee shall be appointed by Act of
the Holders of a majority in principal amount of the Outstanding Securities
delivered to the Company and the retiring Trustee, the successor Trustee so
appointed shall, forthwith upon its acceptance of such appointment in
accordance with the applicable requirements of Section 6.10, become the
successor Trustee and supersede the successor Trustee appointed by the Company.
If no successor Trustee shall have been so appointed by the Company or the
Holders of Securities and accepted appointment in the manner required by this
Section and Section 6.10, any Holder of a Security who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
appointment of a successor Trustee.

         (f) The Company shall give notice of each resignation and each removal
of the Trustee and each appointment of a successor Trustee to all Holders of
Securities in the manner provided in Section 1.6. Each notice shall include the
name of the successor Trustee and the address of its Corporate Trust Office.



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SECTION 6.10. Acceptance of Appointment by Successor.

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

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

SECTION 6.11. Merger, Conversion, Consolidation or Succession to Business.

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

SECTION 6.12. Authenticating Agents.

         The Trustee may, with the consent of the Company, appoint an
Authenticating Agent or Agents acceptable to the Company with respect to the
Securities which shall be authorized to act on behalf of the Trustee to
authenticate Securities issued upon exchange or substitution pursuant to this
Indenture.

         Securities authenticated by an Authenticating Agent shall be entitled
to the benefits of this Indenture and shall be valid and obligatory for all
purposes as if authenticated by the Trustee hereunder, and every reference in
this Indenture to the authentication and delivery of Securities by the Trustee
or the Trustee's certificate of authentication shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each



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<PAGE>   76



Authenticating Agent shall be subject to acceptance by the Company and shall at
all times be a corporation organized and doing business under the laws of the
United States of America, any State thereof or the District of Columbia,
authorized under such laws to act as Authenticating Agent and subject to
supervision or examination by government or other fiscal authority. If at any
time an Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section 6.12, such Authenticating Agent shall resign
immediately in the manner and with the effect specified in this Section 6.12.

         Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this Section 6.12, without the execution or filing of any paper or any
further act on the part of the Trustee or the Authenticating Agent.

         An Authenticating Agent may resign at any time by giving written
notice thereof to the Trustee and to the Company. The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice
thereof to such Authenticating Agent and to the Company. Upon receiving such a
notice of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section 6.12, the Trustee may appoint a successor
Authenticating Agent which shall be subject to acceptance by the Company. Any
successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers and duties of its predecessor
hereunder, with like effect as if originally named as an Authenticating Agent.
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section 6.12.

         The Company agrees to pay to each Authenticating Agent from time to
time reasonable compensation for its services under this Section 6.12.

         If an Authenticating Agent is appointed with respect to the Securities
pursuant to this Section 6.12, the Securities may have endorsed thereon, in
addition to or in lieu of the Trustee's certification of authentication, an
alternative certificate of authentication in the following form:




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<PAGE>   77



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


                                   The Bank of New York,
                                    as Trustee
                                    By [Authenticating Agent],
                                     as Authenticating Agent


                                   By 
                                     ----------------------------------
                                     Authorized Signature

Dated:
      --------------

SECTION 6.13. Disqualification; Conflicting Interests.

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

SECTION 6.14. Preferential Collection of Claims Against Company.

         If and when the Trustee shall be or become a creditor of the Company
(or any other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims
against the Company (or any such other obligor).



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<PAGE>   78



                                 ARTICLE SEVEN

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE


SECTION 7.1. Company May Consolidate, Etc., Only on Certain Terms.

         The Company shall not consolidate with or merge into any other Person
or convey, transfer or lease all its properties and assets substantially as an
entirety to any Person, and the Company shall not permit any Person to
consolidate with or merge into the Company or convey, transfer or lease all or
substantially all of its properties and assets to the Company, unless:

         (1) in case the Company shall consolidate with or merge into another
     Person or convey, transfer or lease its properties and assets
     substantially as an entirety to any Person, the Person formed by such
     consolidation or into which the Company is merged, or the Person which
     acquires by conveyance or transfer, or which leases the properties and
     assets of the Company substantially as an entirety, shall be a
     corporation, limited liability company, partnership or trust, shall be
     organized and validly existing under the laws of the United States of
     America, any State thereof or the District of Columbia and shall expressly
     assume, by an indenture supplemental hereto, executed and delivered to the
     Trustee, in form satisfactory to the Trustee, the due and punctual payment
     of the principal of, premium, if any, and interest (including Liquidated
     Damages, if any, payable pursuant to Section 10.12) on all of the
     Securities as applicable, and the performance or observance of every
     covenant of this Indenture on the part of the Company to be performed or
     observed and shall have provided for conversion rights in accordance with
     Article Twelve;

         (2) immediately after giving effect to such transaction, no Event of
     Default, and no event that after notice or lapse of time or both, would
     become an Event of Default, shall have happened and be continuing; and

         (3) the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, each stating that such consolidation, merger,
     conveyance, transfer or lease and, if a supplemental indenture is required
     in connection with such transaction, such supplemental indenture comply
     with this Article and that all conditions precedent herein provided for
     relating to such transaction have been complied with, together with any
     documents required under Section 8.3.

SECTION 7.2. Successor Substituted.

         Upon any consolidation of the Company with, or merger of the Company
into any other Person or any conveyance, transfer or lease of all or
substantially all the properties and assets of the Company in accordance with
Section 7.1, the successor Person formed by such consolidation or into or with
which the Company is merged or to which such conveyance, transfer



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<PAGE>   79



or lease is made shall succeed to, and be substituted for, and may exercise
every right and power of, the Company under this Indenture with the same effect
as if such successor Person had been named as the Company herein, and
thereafter, except in the case of a lease, the predecessor Person shall be
relieved of all obligations and covenants under this Indenture and the
Securities.



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                                 ARTICLE EIGHT

                            SUPPLEMENTAL INDENTURES


SECTION 8.1. Supplemental Indentures Without Consent of Holders of Securities.

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

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

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

         (3) to secure the Securities; or

         (4) to make provision with respect to the conversion rights of Holders
     of Securities pursuant to Section 12.11; or

         (5) to make any changes or modifications to this Indenture necessary
     in connection with the registration of any Registrable Securities under
     the Securities Act as contemplated by Section 10.12, provided, such action
     pursuant to this clause (5) shall not adversely affect the interests of
     the Holders of Securities; or

         (6) to comply with the requirements of the Trust Indenture Act or the
     rules and regulations of the Commission thereunder in order to effect or
     maintain the qualification of this Indenture under the Trust Indenture
     Act, as contemplated by this Indenture or otherwise; or

         (7) to evidence and provide for the acceptance of appointment
     hereunder by a successor Trustee; or

         (8) to make any change in Article Thirteen that would limit or
     terminate the benefits available to any holder of Senior Indebtedness
     under such Article; or

         (9) to cure any ambiguity, to correct or supplement any provision
     herein which may be inconsistent with any other provision herein or which
     is otherwise defective, or to make any other provisions with respect to
     matters or questions arising under this Indenture as the Company and the
     Trustee may deem necessary or desirable, provided such action






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<PAGE>   81



     pursuant to this clause (9) shall not adversely affect the interests of
     the Holders of Securities in any material respect.

         Upon Company Request, accompanied by a Board Resolution authorizing
the execution of any such supplemental indenture, and subject to and upon
receipt by the Trustee of the documents described in Section 8.3 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.

SECTION 8.2. Supplemental Indentures with Consent of Holders of Securities.

         With either (a) the written consent of the Holders of not less than a
majority in principal amount of the Outstanding Securities, by the Act of said
Holders delivered to the Company and the Trustee, or (b) by the adoption of a
resolution, at a meeting of Holders of the Outstanding Securities at which a
quorum is present, by the Holders of (i) 66-2/3% in principal amount of the
Outstanding Securities represented at such meeting or (ii) a majority in
principal amount of the Outstanding Securities, the Company, when authorized by
a Board Resolution, and the Trustee may enter into an indenture or indentures
supplemental hereto for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or of
modifying in any manner the rights of the Holders of Securities under this
Indenture; provided, however, that no such supplemental indenture shall,
without the consent or affirmative vote of the Holder of each Outstanding
Security affected thereby,

         (1) change the Stated Maturity of the principal of, or any installment
     of interest on, any Security, or reduce the principal amount or the rate
     of interest payable thereon or any premium payable upon redemption or
     mandatory repurchase thereof, or change the obligation of the Company to
     pay Liquidated Damages pursuant to Section 10.12 in a manner adverse to
     the Holders, or change the coin or currency in which any Security or the
     interest or any premium thereon or any other amount in respect thereof is
     payable, or impair the right to institute suit for the enforcement of any
     payment in respect of any Security on or after the Stated Maturity thereof
     (or, in the case of redemption or any repurchase, on or after the
     Redemption Date or Repurchase Date, as the case may be) or, except as
     permitted by Section 12.11, adversely affect the right to convert any
     Security as provided in Article Twelve, or modify the provisions of this
     Indenture with respect to the subordination of the Securities in a manner
     adverse to the Holders of Securities; or

         (2) reduce the requirements of Section 9.4 for quorum or voting, or
     reduce the percentage in principal amount of the Outstanding Securities
     the consent of whose Holders is required for any such supplemental
     indenture or the consent of whose Holders is required for any waiver (of
     compliance with certain provisions of this Indenture or certain defaults
     hereunder and their consequences) provided for in this Indenture; or






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<PAGE>   82



         (3) modify the obligation of the Company to maintain an office or
     agency in the Borough of Manhattan, The City of New York, pursuant to
     Section 10.2; or

         (4) modify any of the provisions of this Section or Section 5.13 or
     10.13, except to increase any percentage contained herein or therein or to
     provide that certain other provisions of this Indenture cannot be modified
     or waived without the consent of the Holder of each Outstanding Security
     affected thereby; or

         (5) modify the provisions of Article Fourteen in a manner adverse to
     the Holders; or

         (6) modify any of the provisions of Section 10.10 or 10.11.

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

SECTION 8.3. Execution of Supplemental Indentures.

         In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby
of the trusts created by this Indenture, the Trustee shall be entitled to
receive, and (subject to Sections 6.1 and 6.3) shall be fully protected in
relying upon, an Opinion of Counsel stating that the execution of such
supplemental indenture is authorized or permitted by this Indenture, and that
such supplemental indenture has been duly authorized, executed and delivered by
the Company and constitutes a valid and legally binding obligation of the
Company enforceable against the Company in accordance with its terms. The
Trustee may, but shall not be obligated to, enter into any such supplemental
indenture which affects the Trustee's own rights, duties or immunities under
this Indenture or otherwise.

SECTION 8.4. Effect of Supplemental Indentures.

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

SECTION 8.5. Reference in Securities to Supplemental Indentures.

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






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<PAGE>   83



Company and the Trustee, to any such supplemental indenture may be prepared and
executed by the Company and authenticated and delivered by the Trustee in
exchange for Outstanding Securities.

SECTION 8.6. Notice of Supplemental Indentures.

         Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of Section 8.2, the Company
shall give notice to all Holders of Securities of such fact, setting forth in
general terms the substance of such supplemental indenture, in the manner
provided in Section 1.6. Any failure of the Company to give such notice, or any
defect therein, shall not in any way impair or affect the validity of any such
supplemental indenture.






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<PAGE>   84



                                  ARTICLE NINE

                       MEETINGS OF HOLDERS OF SECURITIES


SECTION 9.1. Purposes for Which Meetings May Be Called.

         A meeting of Holders of Securities may be called at any time and from
time to time pursuant to this Article to make, give or take any request,
demand, authorization, direction, notice, consent, waiver or other action
provided by this Indenture to be made, given or taken by Holders of Securities.

SECTION 9.2. Call, Notice and Place of Meetings.

         (a) The Trustee may at any time call a meeting of Holders of
Securities for any purpose specified in Section 9.1, to be held at such time
and at such place in the Borough of Manhattan, The City of New York, as the
Trustee shall determine. Notice of every meeting of Holders of Securities,
setting forth the time and the place of such meeting and in general terms the
action proposed to be taken at such meeting, shall be given, in the manner
provided in Section 1.6, not less than 21 nor more than 180 days prior to the
date fixed for the meeting.

         (b) In case at any time the Company, pursuant to a Board Resolution,
or the Holders of at least 10% in principal amount of the Outstanding
Securities shall have requested the Trustee to call a meeting of the Holders of
Securities for any purpose specified in Section 9.1, by written request setting
forth in reasonable detail the action proposed to be taken at the meeting, and
the Trustee shall not have made the first publication of the notice of such
meeting within 21 days after receipt of such request or shall not thereafter
proceed to cause the meeting to be held as provided herein, then the Company or
the Holders of Securities in the amount specified, as the case may be, may
determine the time and the place in the Borough of Manhattan, The City of New
York, for such meeting and may call such meeting for such purposes by giving
notice thereof as provided in paragraph (a) of this Section.

SECTION 9.3. Persons Entitled to Vote at Meetings.

         To be entitled to vote at any meeting of Holders of Securities, a
Person shall be (a) a Holder of one or more Outstanding Securities, or (b) a
Person appointed by an instrument in writing as proxy for a Holder or Holders
of one or more Outstanding Securities by such Holder or Holders. The only
Persons who shall be entitled to be present or to speak at any meeting of
Holders 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.







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<PAGE>   85



SECTION 9.4. Quorum; Action.

         The Persons entitled to vote a majority in principal amount of the
Outstanding Securities shall constitute a quorum. In the absence of a quorum
within 30 minutes of the time appointed for any such meeting, the meeting
shall, if convened at the request of Holders of Securities, be dissolved. In
any other case, the meeting may be adjourned for a period of not less than 10
days as determined by the chairman of the meeting prior to the adjournment of
such meeting. In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting (subject to repeated applications of this sentence). Notice
of the reconvening of any adjourned meeting shall be given as provided in
Section 9.2(a), except that such notice need be given only once not less than
five days prior to the date on which the meeting is scheduled to be reconvened.
Notice of the reconvening of an adjourned meeting shall state expressly the
percentage of the principal amount of the Outstanding Securities which shall
constitute a quorum.

         Subject to the foregoing, at the reconvening of any meeting adjourned
for a lack of a quorum, the Persons entitled to vote 25% in principal amount of
the Outstanding Securities at the time shall constitute a quorum for the taking
of any action set forth in the notice of the original meeting.

         At a meeting or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid, any resolution and all matters (except as
limited by the proviso to Section 8.2 and except to the extent Section 10.13
requires a different vote) shall be effectively passed and decided if passed or
decided by the Persons entitled to vote not less than 66-2/3% in principal
amount of Outstanding Securities represented and entitled to vote at such
meeting.

                  Any resolution passed or decisions taken at any meeting of
Holders of Securities duly held in accordance with this Section shall be
binding on all the Holders of Securities whether or not present or represented
at the meeting. The Trustee shall, in the name and at the expense of the
Company, notify all the Holders of Securities of any such resolutions or
decisions pursuant to Section 1.6.

SECTION 9.5. Determination of Voting Rights; Conduct and Adjournment of
             Meetings.

         (a) Notwithstanding any other provisions of this Indenture, the
Trustee may make such reasonable regulations as it may deem advisable for any
meeting of Holders of Securities in regard to proof of the holding of
Securities and of the appointment of proxies and in regard to the appointment
and duties of inspectors of votes, the submission and examination of proxies,
certificates and other evidence of the right to vote, and such other matters
concerning the conduct of the meeting as it shall deem appropriate. Except as
otherwise permitted or required by any such regulations, the holding of
Securities shall be proved in the manner specified in Section 1.4 and the
appointment of any proxy shall be proved in the manner specified in Section 1.4
or by having







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<PAGE>   86



the signature of the Person executing the proxy guaranteed by any bank, broker
or other eligible institution participating in a recognized medallion signature
guarantee program.

         (b) The Trustee shall, by an instrument in writing, appoint a
temporary chairman (which may be the Trustee) of the meeting, unless the
meeting shall have been called by the Company or by Holders of Securities as
provided in Section 9.2(b), in which case the Company or the Holders of
Securities calling the meeting, as the case may be, shall in like manner
appoint a temporary chairman. A permanent chairman and a permanent secretary of
the meeting shall be elected by vote of the Persons entitled to vote a majority
in principal amount of the Outstanding Securities represented at the meeting.

         (c) At any meeting, each Holder of a Security or proxy shall be
entitled to one vote for each U.S.$1,000 principal amount of Securities held or
represented by him; provided, however, that no vote shall be cast or counted at
any meeting in respect of any Security challenged as not Outstanding and ruled
by the chairman of the meeting to be not Outstanding. The chairman of the
meeting shall have no right to vote, except as a Holder of a Security or proxy.

         (d) Any meeting of Holders of Securities duly called pursuant to
Section 9.2 at which a quorum is present may be adjourned from time to time by
Persons entitled to vote a majority in principal amount of the Outstanding
Securities represented at the meeting, and the meeting may be held as so
adjourned without further notice.

SECTION 9.6. Counting Votes and Recording Action of Meetings.

         The vote upon any resolution submitted to any meeting of Holders of
Securities shall be by written ballots on which shall be subscribed the
signatures of the Holders of Securities or of their representatives by proxy
and the principal amounts at Stated Maturity and serial numbers of the
Outstanding Securities held or represented by them. The permanent chairman of
the meeting shall appoint two inspectors of votes who shall count all votes
cast at the meeting for or against any resolution and who 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, at least in duplicate, of the
proceedings of each meeting of Holders of Securities shall be prepared by the
secretary of the meeting and there shall be attached to said 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 said notice was
given as provided in Section 9.2 and, if applicable, Section 9.4. Each copy
shall be signed and verified by the affidavits of the permanent chairman and
secretary of the meeting and one such copy shall be delivered to the Company
and another 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.






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<PAGE>   87



                                  ARTICLE TEN

                                   COVENANTS


SECTION 10.1.         Payment of Principal, Premium and Interest.

         The Company covenants and agrees that it will duly and punctually pay
the principal of and premium, if any, and interest on the Securities in
accordance with the terms of the Securities and this Indenture. The Company
will deposit or cause to be deposited with the Trustee, no later than one
Business Day prior to the date of the Stated Maturity of any Security or no
later than one Business Day prior to the due date for any installment of
interest, all payments so due, which payments shall be in immediately available
funds on the date of such Stated Maturity or due date, as the case may be.

SECTION 10.2. Maintenance of Offices or Agencies.

         The Company hereby appoints the Corporate Trust Office of the Trustee
as its agent in the Borough of Manhattan, The City of New York, where
Securities may be presented or surrendered for payment, where Securities may be
surrendered for registration of transfer or exchange, where Securities may be
surrendered for conversion, and where notices and demands to or upon the
Company in respect of the Securities and this Indenture may be served.

         The Company may at any time and from time to time vary or terminate
the appointment of any such agent or appoint any additional agents for any or
all of such purposes; provided, however, that until all of the Securities have
been delivered to the Trustee for cancellation, or monies sufficient to pay the
principal of, premium, if any, and interest on the Securities have been made
available for payment and either paid or returned to the Company pursuant to
the provisions of Section 10.3, the Company will maintain in the Borough of
Manhattan, The City of New York, an office or agency where Securities may be
presented or surrendered for payment and conversion, where Securities may be
surrendered for registration of transfer or exchange and where notices and
demands to or upon the Company in respect of the Securities and this Indenture
may be served. The Company will give prompt written notice to the Trustee, and
notice to the Holders in accordance with Section 1.6, of the appointment or
termination of any such agents and of the location and any change in the
location of any such office or agency.

         If at any time the Company shall fail to maintain any such required
office or agency, or shall fail to furnish the Trustee with the address
thereof, presentations and surrenders may be made and notices and demands may
be served on the Corporate Trust Office of the Trustee.





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<PAGE>   88



SECTION 10.3. Money for Security Payments To Be Held in Trust.

         If the Company shall act as its own Paying Agent, it will, on or
before each due date of the principal of, premium, if any, or interest on any
of the Securities, segregate and hold in trust for the benefit of the Persons
entitled thereto a sum sufficient to pay the principal, premium, if any, or
interest so becoming due until such sums shall be paid to such Persons or
otherwise disposed of as herein provided and the Company will promptly notify
the Trustee of its action or failure so to act.

         Whenever the Company shall have one or more Paying Agents, it will, no
later than one Business Day prior to each due date of the principal of,
premium, if any, or interest on any Securities, deposit with the Trustee a sum
sufficient to pay the principal, premium, if any, or interest so becoming due,
such sum to be held for the benefit of the Persons entitled to such principal,
premium, if any, or interest, and (unless such Paying Agent is the Trustee) the
Company will promptly notify the Trustee of any failure so to act.

         The Company will cause each Paying Agent other than the Trustee to
execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section, that
such Paying Agent will:

         (1) hold all sums held by it for the payment of the principal of,
     premium, if any, or interest on Securities for the benefit of the Persons
     entitled thereto until such sums shall be paid to such Persons or
     otherwise disposed of as herein provided;

         (2) give the Trustee notice of any default by the Company (or any
     other obligor upon the Securities) in the making of any payment of
     principal, premium, if any, or interest; and

         (3) at any time during the continuance of any such default, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums so
     held by such Paying Agent.

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

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




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<PAGE>   89



thereafter, as an unsecured general creditor, look only to the Company for
payment thereof, and all liability of the Trustee or such Paying Agent with
respect to such trust money, and all liability of the Company as trustee
thereof, shall thereupon cease; provided, however, that the Trustee or such
Paying Agent, before being required to make any such repayment, may at the
expense of the Company cause to be published once, in an Authorized Newspaper
in each Place of Payment, notice that such money remains unclaimed and that,
after a date specified therein, which shall not be less than 30 days from the
date of such publication, any unclaimed balance of such money then remaining
will be repaid to the Company.

SECTION 10.4. [Reserved].


SECTION 10.5. Existence.

         Subject to Article Seven, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence,
rights (charter and statutory) and corporate power and authority; provided,
however, that the Company shall not be required to preserve any such right or
franchise if the Board of Directors shall determine that the preserva tion
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.

SECTION 10.6. Maintenance of Properties.

         The Company will cause all material properties used or useful in the
conduct of its business or the business of any Subsidiary to be maintained and
kept in good condition, repair and working order and supplied with all
necessary equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
the Company may be necessary so that the business carried on in connection
therewith may be properly and advantageously conducted at all times; provided,
however, that nothing in this Section shall prevent the Company from
discontinuing the operation or maintenance of any of such properties if such
discontinuance is, in the judgment of the Company, desirable in the conduct of
its business or the business of any Subsidiary and not disadvantageous in any
material respect to the Holders.

SECTION 10.7. Payment of Taxes and Other Claims.

         The Company will pay or discharge, or cause to be paid or discharged,
before the same may become delinquent, (1) all taxes, assessments and
governmental charges levied or imposed upon the Company or any Subsidiary or
upon the income, profits or property of the Company or any Subsidiary, (2) all
claims for labor, materials and supplies which, if unpaid, might by law become
a lien or charge upon the property of the Company or any Subsidiary, and (3)
all stamps and other duties, if any, which may be imposed by the United States
or any political subdivision thereof or therein in connection with the
issuance, transfer, exchange or conversion






                                    -79-

<PAGE>   90



of any Securities or with respect to this Indenture; provided, however, that,
in the case of clauses (1) and (2), the Company shall not be required to pay or
discharge or cause to be paid or discharged any such tax, assessment, charge or
claim (a) if the failure to do so will not, in the aggregate, have a material
adverse impact on the Company, or (b) if the amount, applicability or validity
is being contested in good faith by appropriate proceedings.

SECTION 10.8. Registration and Listing.

         Prior to the Exchange Date, the Company (i) will effect all
registrations with, and obtain all approvals by, all governmental authorities
that may be necessary under any United States Federal or state law (including
the Securities Act, the Exchange Act and state securities and Blue Sky laws)
before the shares of Common Stock issuable upon conversion of Securities may be
lawfully issued and delivered, and qualified or listed as contemplated by
clause (ii) (it being understood that the Company shall not be required to
register the Securities under the Securities Act, except pursuant to the
Registration Rights Agreement referred to in Section 10.12); and (ii) will
qualify the shares of Common Stock required to be issued and delivered upon
conversion of Securities, prior to such issuance or delivery, for quotation on
the Nasdaq National Market or, if the Common Stock is not then quoted on the
Nasdaq National Market, list the Common Stock on each national securities
exchange on which outstanding Common Stock is listed or quoted at the time of
such delivery. Nothing in this Section 10.8 will limit the application of
Section 10.12.

SECTION 10.9. Statement by Officers as to Default.

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

         The Company will deliver to the Trustee, forthwith upon becoming aware
of any default in the performance or observance of any covenant, agreement or
condition contained in this Indenture, or any Event of Default, an Officers'
Certificate specifying with particularity such default or Event of Default and
further stating what action the Company has taken, is taking or proposes to
take with respect thereto.

         Any notice required to be given under this Section 10.9 shall be
delivered to the Trustee at its Corporate Trust Office.






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<PAGE>   91

SECTION 10.10. Delivery of Certain Information.

         At any time when the Company is not subject to Section 13 or 15(d) of
the Exchange Act, upon the request of a Holder of a Restricted Security or the
holder of shares of Common Stock issued upon conversion thereof, the Company
will promptly furnish or cause to be furnished Rule 144A Information (as
defined below) to such Holder of Restricted Securities or such holder of shares
of Common Stock issued upon conversion of Restricted Securities, or to a
prospective purchaser of any such security designated by any such Holder or
holder, as the case may be, to the extent required to permit compliance by such
Holder or holder with Rule 144A under the Securities Act (or any successor
provision thereto) in connection with the resale of any such security;
provided, however, that the Company shall not be required to furnish such
information in connection with any request made on or after the date which is
two years from the later of (i) the date such a security (or any such
predecessor security) was last acquired from the Company or (ii) the date such
a security (or any such predecessor security) was last acquired from an
"affiliate" of the Company within the meaning of Rule 144 under the Securities
Act (or any successor provision thereto). "Rule 144A Information" shall be such
information as is specified pursuant to Rule 144A(d)(4) under the Securities
Act (or any successor provision thereto).

SECTION 10.11. Resale of Certain Securities; Reporting Issuer.

         During the period beginning on the last date of original issuance of
the Securities and ending on the date that is two years from such date, the
Company will not, and will not permit any of its subsidiaries or other
"affiliates" (as defined under Rule 144 under the Securities Act or any
successor provision thereto) controlled by it to, resell (x) any Securities
which constitute "restricted securities" under Rule 144 or (y) any securities
into which the Securities have been converted under this Indenture which
constitute "restricted securities" under Rule 144, that in either case have
been reacquired by any of them. The Trustee shall have no responsibility in
respect of the Company's performance of its agreement in the preceding
sentence.

SECTION 10.12. Registration Rights.

         The Company agrees that the Holders from time to time of Registrable
Securities (as defined below) are entitled to the benefits of a Registration
Rights Agreement, dated as of August 7, 1997 (the "Registration Rights
Agreement"), executed by the Company. Pursuant to the Registration Rights
Agreement, the Company has agreed for the benefit of the Holders from time to
time of Registrable Securities, at the Company's expense, (i) to file within 90
calendar days after the first date of original issuance of the Securities, a
shelf registration statement (the "Shelf Registration Statement") with the
Commission with respect to resales of the Registrable Securities, (ii)
thereafter use reasonable efforts to cause such Shelf Registration Statement to
be declared effective by the Commission within 90 days after the filing of such
Shelf Registration Statement, and (iii) to use reasonable efforts to maintain
such Shelf Registration Statement continuously effective under the Securities
Act of 1933, as amended, until a period of two years from the last date of
original issuance of the Securities or, if earlier, until (1) there are no
outstanding Registrable Securities or (2) when, in the written opinion of
independent counsel to the Company, all outstanding Registrable Securities held
by persons that are not "affiliates" of the




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<PAGE>   92



Company (as defined in Rule 144(a)(1) under the Securities Act) may be resold
without registration under the Securities Act pursuant to Rule 144(k) under the
Securities Act (or any successor provision thereto) and the Company has removed
all legends from the Registrable Securities restricting the transfer thereof
(other than any Registrable Security held by an affiliate).

         If (i) on or prior to 90 days following the date of original issuance
of the Registered Securities, a Shelf Registration Statement has not been filed
with the Commission, or (ii) on or prior to the 90th day following such filing,
such Shelf Registration Statement is not declared effective (each, a
"Registration Default"), additional interest ("Liquidated Damages") will accrue
on the Registered Securities from and including the day following such
Registration Default to but excluding the day on which such Registration
Default has been cured. Liquidated Damages will be paid semi-annually in
arrears, with the first semi-annual payment due on the first Interest Payment
Date in respect of the Registered Securities following the date on which such
Liquidated Damages begin to accrue, and will accrue at a rate per annum equal
to an additional one-quarter of one percent (.25%) of the principal amount of
the Registered Securities to and including the 90th day following such
Registration Default and at a rate per annum equal to one-half of one percent
(.50%) thereof from and after the 91st day following such Registration Default.
In the event that the Shelf Registration Statement ceases to be effective (or
the Holders are otherwise prevented or restricted by the Company from effecting
sales pursuant thereto) prior to the third annual anniversary of the initial
effective date of the Shelf Registration Statement or such earlier date as is
provided in the Registration Rights Agreement for a period in excess of 60
days, whether or not consecutive, during any 12-month period (an "Effectiveness
Failure"), then the interest rate borne by the Registered Securities shall
increase by an additional one-half of one percent (.50%) per annum on the 61st
day of the applicable 12-month period such Shelf Registration Statement ceases
to be effective (or the Holders are otherwise prevented or restricted by the
Company from effecting sales pursuant thereto) to but excluding the day on
which the Effectiveness Failure is cured. For the purposes of determining an
Effectiveness Failure, days on which the Company has been obligated to pay
Liquidated Damages in respect of a prior Effectiveness Failure within the
applicable 12 month period will not be included.

         Whenever in this Indenture there is mentioned, in any context, the
payment of the principal of, premium, if any, or interest on, or in respect of,
any Registered Security, such mention shall be deemed to include mention of the
payment of Liquidated Damages provided for in this Section to the extent that,
in such context, Liquidated Damages are, were or would be payable in respect
thereof pursuant to the provisions of this Section, and express mention of the
payment of Liquidated Damages (if applicable) in any provisions hereof shall
not be construed as excluding Liquidated Damages in those provisions hereof
where such express mention is not made.

         For the purposes of the Registration Rights Agreement, "Registrable
Securities" means all or any portion of the Registered Securities issued from
time to time under this Indenture and the shares of Common Stock issuable upon
conversion of such Securities provided, however, that a Security or the shares
of Common Stock issuable upon conversion of a Security ceases to be a
Registrable Security when it (i) has been effectively registered under the
Securities Act and




                                    -82-

<PAGE>   93



sold in a manner contemplated by the Shelf Registration Statement or (ii) has
been transferred in compliance with Rule 144 under the Securities Act (or any
successor provisions thereto).

         If a Security, or the shares of Common Stock issuable upon conversion
of a Security, is a Registrable Security, and the Holder thereof elects to sell
such Registrable Security pursuant to the Shelf Registration Statement then, by
its acceptance thereof, the Holder of such Registrable Security will have
agreed to be bound by the terms of the Registration Rights Agreement relating
to the Registrable Securities which are the subject of such election.

         For the purposes of the Registration Rights Agreement, the term
"Holder" includes any Person that has a beneficial interest in any Global
Security or any beneficial interest in a global security representing shares of
Common Stock issuable upon conversion of a Security.

SECTION 10.13. Waiver of Certain Covenants.

         The Company may omit in any particular instance to comply with any
covenant or conditions set forth in Sections 10.5 to 10.7, inclusive (other
than a covenant or condition which under Article Eight cannot be modified or
amended without the consent of the Holder of each Outstanding Security
affected), if before the time for such compliance the Holders shall, through
the written consent of, or the adoption of a resolution at a meeting of Holders
of the Outstanding Securities at which a quorum is present by, not less than a
majority in principal amount of the Outstanding Securities, either waive such
compliance in such instance or generally waive compliance with such covenant or
condition, but no such waiver shall extend to or affect such covenant or
condition except to the extent so expressly waived, and, until such waiver
shall become effective, the obligations of the Company and the duties of the
Trustee or any Paying or Conversion Agent in respect of any such covenant or
condition shall remain in full force and effect.





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<PAGE>   94



                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES


SECTION 11.1. Right of Redemption.

         The Securities may be redeemed in accordance with the provisions of
the forms of Securities set forth in Section 2.2.

SECTION 11.2. Applicability of Article.

         Redemption of Securities at the election of the Company or otherwise,
as permitted or required by any provision of the Securities or this Indenture
(other than a redemption upon a Change in Control), shall be made in accordance
with such provision and this Article Eleven.

SECTION 11.3. Election to Redeem; Notice to Trustee.

         The election of the Company to redeem any Securities shall be
evidenced by a Board Resolution. In case of any redemption at the election of
the Company of any of the Securities, the Company shall, at least 60 days prior
to the Redemption Date fixed by the Company (unless a shorter notice shall be
satisfactory to the Trustee), notify the Trustee in writing of such Redemption
Date. If the Securities are to be redeemed pursuant to an election of the
Company which is subject to a condition specified in the form of Securities set
forth in Section 2.2, the Company shall furnish the Trustee with an Officers'
Certificate stating that the Company is entitled to effect such redemption and
setting forth a statement of facts showing that the conditions precedent to the
right of the Company so to redeem have occurred.

SECTION 11.4. Selection by Trustee of Securities To Be Redeemed.

         If less than all the Securities are to be redeemed, the particular
Securities to be redeemed shall be selected by the Trustee within two Business
Days after it receives the notice described in 11.3, from the Outstanding
Securities not previously called for redemption, by such method as the Trustee
may deem fair and appropriate.

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





                                    -84-

<PAGE>   95



         The Trustee shall promptly notify the Company and each Security
Registrar in writing of the securities selected for redemption and, in the case
of any Securities selected for partial redemption, the principal amount thereof
to be redeemed.

         For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

SECTION 11.5. Notice of Redemption.

         Notice of redemption shall be given in the manner provided in Section
1.6 to the Holders of Securities to be redeemed not less than 30 nor more than
60 days prior to the Redemption Date, and such notice shall be irrevocable.

         All notices of redemption shall state:

         (1) the Redemption Date,

         (2) the Redemption Price, and accrued interest, if any,

         (3) if less than all Outstanding Securities are to be redeemed, the
     aggregate principal amount of Securities to be redeemed and the aggregate
     principal amount of Securities which will be outstanding after such
     partial redemption,

         (4) that on the Redemption Date the Redemption Price, and accrued
     interest, if any, will become due and payable upon each such Security to
     be redeemed, and that interest thereon shall cease to accrue on and after
     said date,

         (5) the Conversion Price, the date on which the right to convert the
     Securities to be redeemed will terminate and the places where such
     Securities, may be surrendered for conversion, and

         (6) the place or places where such Securities, are to be surrendered
     for payment of the Redemption Price and accrued interest, if any.

         In case of a partial redemption, the first notice given shall specify
the last date on which exchanges or transfers of Securities may be made
pursuant to Section 3.5 and the second notice shall specify the serial and
CUSIP numbers (if any) and the portions thereof called for redemption.

         Notice of redemption of Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's written request,
by the Trustee in the name




                                    -85-

<PAGE>   96



of and at the expense of the Company. Notice of redemption of Securities to be
redeemed at the election of the Company received by the Trustee shall be given
by the Trustee to each Paying Agent in the name of and at the expense of the
Company.

SECTION 11.6. Deposit of Redemption Price.

         Not less than one Business Day prior to any Redemption Date, the
Company shall deposit with the Trustee (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 10.3) an
amount of money (which shall be in immediately available funds on such
Redemption Date) sufficient to pay the Redemption Price of, and (except if the
Redemption Date shall be an Interest Payment Date) accrued interest on, all the
Securities which are to be redeemed on that date other than any Securities
called for redemption on that date which have been converted prior to the date
of such deposit.

         If any Security called for redemption is converted, any money
deposited with the Trustee or so segregated and held in trust for the
redemption of such Security shall (subject to any right of the Holder of such
Security or any Predecessor Security to receive interest as provided in the
last paragraph of Section 3.7) be paid to the Company on Company Request or, if
then held by the Company, shall be discharged from such trust.

SECTION 11.7. Securities Payable on Redemption Date.

         Notice of redemption having been given as aforesaid, the Securities so
to be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified and from and after such date (unless the
Company shall default in the payment of the Redemption Price, including accrued
interest) such Securities shall cease to bear interest. Upon surrender of any
Security for redemption in accordance with said notice such Security shall be
paid by the Company at the Redemption Price together with accrued and unpaid
interest to the Redemption Date; provided, however, that installments of
interest on Securities whose Stated Maturity is on or prior to the Redemption
Date shall be payable to the Holders of such Securities, or one or more
Predecessor Securities, registered as such on the relevant Record Date
according to their terms and the provisions of Section 3.7.

         If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal amount of, premium, if any,
and, to the extent permitted by applicable law, accrued interest on such
Security shall, until paid, bear interest from the Redemption Date at a rate of
7% per annum and such Security shall remain convertible until the principal of
such Security (or portion thereof, as the case may be) shall have been paid or
duly provided for.





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SECTION 11.8. Securities Redeemed in Part.

         Any Security which is to be redeemed only in part shall be surrendered
at an office or agency of the Company designated for that purpose pursuant to
Section 10.2 (with, if the Company or the Trustee so requires, due endorsement
by, or a written instrument of transfer in form satisfactory to the Company and
the Trustee duly executed by, the Holder thereof or his attorney duly
authorized in writing), and the Company shall execute, and the Trustee shall
authen ticate and make available for delivery to the Holder of such Security
without service charge, a new Registered Security or Securities, of any
authorized denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered.




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                                 ARTICLE TWELVE

                            CONVERSION OF SECURITIES


SECTION 12.1. Conversion Privilege and Conversion Price.

         Subject to and upon compliance with the provisions of this Article, at
the option of the Holder thereof, any Security may be converted into fully paid
and nonassessable shares (calculated as to each conversion to the nearest
1/100th of a share) of Common Stock of the Company at the Conversion Price,
determined as hereinafter provided, in effect at the time of conversion. Such
conversion right shall commence on the 90th days after the last original issue
date of the Notes and expire at the close of business on August 1, 2004,
subject, in the case of conversion of any Global Security, to any Applicable
Procedures. In case a Security or portion thereof is called for redemption at
the election of the Company or the Holder thereof exercises his right to
require the Company to repurchase the Security, such conversion right in
respect of the Security, or portion thereof so called, shall expire at the
close of business on the fifth Trading Day preceding the Redemption Date or the
second Trading Day preceding the Repurchase Date, as the case may be, unless
the Company defaults in making the payment due upon redemption or repurchase,
as the case may be (in each case subject as aforesaid to any Applicable
Procedures with respect to any Global Security).

         The price at which shares of Common Stock shall be delivered upon
conversion (herein called the "Conversion Price") shall be initially U.S.
$49.725 per share of Common Stock. The Conversion Price shall be adjusted in
certain instances as provided in this Article Twelve.

SECTION 12.2. Exercise of Conversion Privilege.

         In order to exercise the conversion privilege, the Holder of any
Security to be converted shall surrender such Security, duly endorsed or
assigned to the Company or in blank, at any office or agency of the Company
maintained for that purpose pursuant to Section 10.2, accompanied by a duly
signed conversion notice substantially in the form set forth in Section 2.5
stating that the Holder elects to convert such Security or, if less than the
entire principal amount thereof is to be converted, the portion thereof to be
converted. Each Security surrendered for conversion (in whole or in part)
during the period from the close of business on any Regular Record Date next
preceding any Interest Payment Date to the opening of business on such Interest
Payment Date shall (except in the case of any Security or portion thereof which
has been called for redemption or is to be repurchased and, as a result, the 
right to convert such Security would terminate during such period) be 
accompanied by payment in New York Clearing House funds or other funds
acceptable to the Company of an amount equal to the interest payable on such
Interest Payment Date on the principal amount of such Security (or part
thereof, as the case may be) being surrendered for conversion. The interest so
payable on such Interest Payment Date with




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<PAGE>   99



respect to any Security (or portion thereof, if applicable) which has been
called for redemption, or is to be repurchased, and as a result the right to
convert such Security (or portion thereof, if applicable) would terminate 
during the period from the close of business on any Record Date next preceding
any Interest Payment Date to the opening of business on such Interest Payment
Date, which Security (or portion thereof, if applicable) is surrendered for
conversion during such period, shall be paid to the Holder of such Security
being converted in an amount equal to the interest that would have been payable
on such Security if such Security had been converted as of the close of
business on such Interest Payment Date. The interest so payable on such
Interest Payment Date in respect of any Security (or portion thereof, as the
case may be) which has not been called for redemption on a Redemption Date, or
is not eligible for repurchase on a Repurchase Date, that, in either case,
would cause the right to convert such Security to terminate during the period
from the close of business on any Record Date next preceding any Interest
Payment Date to the opening of business on such Interest Payment Date, which
Security (or portion thereof, as the case may be) is surrendered for conversion
during such period, shall be paid to the Holder of such Security as of such
Regular Record Date. Interest payable in respect of any Security surrendered
for conversion on or after an Interest Payment Date shall be paid to the Holder
of such Security as of the next preceding Regular Record Date, notwithstanding
the exercise of the right of conversion. Except as provided in this paragraph
and subject to the last paragraph of Section 3.7, no cash payment or adjustment
shall be made upon any conversion on account of any interest accrued from the
Interest Payment Date next preceding the conversion date, in respect of any
Security (or part thereof, as the case may be) surrendered for conversion, or
on account of any dividends on the Common Stock issued upon conversion. The
Company's delivery to the Holder of the number of shares of Common Stock (and
cash in lieu of fractions thereof, as provided in this Indenture) into which a
Security is convertible will be deemed to satisfy the Company's obligation to
pay the principal amount of the Security.

         Securities shall be deemed to have been converted immediately prior to
the close of business on the day of surrender of such Securities for conversion
in accordance with the foregoing provisions, and at such time the rights of the
Holders of such Securities as Holders shall cease, and the Person or Persons
entitled to receive the Common Stock issuable upon conversion shall be treated
for all purposes as the record holder or holders of such Common Stock at such
time. As promptly as practicable on or after the conversion date, the Company
shall issue and deliver to the Trustee, for delivery to the Holder, a
certificate or certificates for the number of full shares of Common Stock
issuable upon conversion, together with payment in lieu of any fraction of a
share, as provided in Section 12.3.

         All shares of Common Stock delivered upon such conversion of
Restricted Securities shall bear restrictive legends substantially in the form
of the legends required to be set forth on the Restricted Securities pursuant
to Section 3.5 and shall be subject to the restrictions on transfer provided in
such legends. Neither the Trustee nor any agent maintained for the purpose of
such conversion shall have any responsibility for the inclusion or content of
any such restrictive legends on such Common Stock; provided, however, that the
Trustee or any agent maintained for the purpose of such conversion shall have
provided, to the Company or to the Company's transfer agent for such Common
Stock, prior to or concurrently with a request to the




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<PAGE>   100



Company to deliver such Common Stock, written notice that the Securities
delivered for conversion are Restricted Securities.

         In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Registered
Security or Securities of authorized denominations in an aggregate principal
amount equal to the unconverted portion of the principal amount of such
Security. A Security may be converted in part, but only if the principal amount
of such Security to be converted is any integral multiple of U.S.$1,000 and the
principal amount of such security to remain Outstanding after such conversion
is equal to U.S.$1,000 or any integral multiple of $1,000 in excess thereof.

         If shares of Common Stock to be issued upon conversion of a Restricted
Security, or Registered Securities to be issued upon conversion of a Restricted
Security in part only, are to be registered in a name other than that of the
beneficial owner of such Restricted Security, then such Holder must deliver to
the Conversion Agent a Surrender Certificate, dated the date of surrender of
such Restricted Security and signed by such beneficial owner, as to compliance
with the restrictions on transfer applicable to such Restricted Security.
Neither the Trustee nor any Conversion Agent, Registrar or Transfer Agent shall
be required to register in a name other than that of the beneficial owner,
shares of Common Stock or Securities issued upon conversion of any such
Restricted Security not so accompanied by a properly completed Surrender
Certificate.

SECTION 12.3. Fractions of Shares.

         No fractional shares of Common Stock shall be issued upon conversion
of any Security or Securities. If more than one Security shall be surrendered
for conversion at one time by the same Holder, the number of full shares which
shall be issuable upon conversion thereof shall be computed on the basis of the
aggregate principal amount of the Securities (or specified portions thereof) so
surrendered. Instead of any fractional share of Common Stock which would
otherwise be issuable upon conversion of any Security or Securities (or
specified portions thereof), the Company shall calculate and pay a cash
adjustment in respect of such fraction (calculated to the nearest 1/100th of a
share) in an amount equal to the same fraction of the Closing Price Per Share
at the close of business on the day of conversion.

SECTION 12.4. Adjustment of Conversion Price.

         The Conversion Price shall be subject to adjustments from time to time
as follows:

         (1) In case the Company shall pay or make a dividend or other
distribution on any class of capital stock of the Company payable in shares of
Common Stock, the Conversion Price in effect at the opening of business on the
day following the date fixed for the determination of stockholders entitled to
receive such dividend or other distribution shall be reduced by multiplying
such Conversion Price by a fraction of which the numerator shall be the number
of shares of




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<PAGE>   101



Common Stock outstanding at the close of business on the date fixed for such
determination and the denominator shall be the sum of such number of shares and
the total number of shares constituting such dividend or other distribution,
such reduction to become effective immediately after the opening of business on
the day following the date fixed for such determination. If, after any such
date fixed for determination, any dividend or distribution is not in fact paid,
the Conversion Price shall be immediately readjusted, effective as of the date
the Board of Directors determines not to pay such dividend or distribution, to
the Conversion Price that would have been in effect if such determination date
had not been fixed. For the purposes of this paragraph (1), the number of
shares of Common Stock at any time outstanding shall not include shares held in
the treasury of the Company but shall include shares issuable in respect of
scrip certificates issued in lieu of fractions of shares of Common Stock. The
Company will not pay any dividend or make any distribution on shares of Common
Stock held in the treasury of the Company.

         (2) In case the Company shall issue rights, options or warrants to all
holders of its Common Stock entitling them to subscribe for or purchase shares
of Common Stock at a price per share less than the current market price per
share (determined as provided in paragraph (8) of this Section 12.4) of the
Common Stock on the date fixed for the determination of stockholders entitled
to receive such rights, options or warrants (other than any rights, options or
warrants that by their terms will also be issued to any Holder upon conversion
of a Security into shares of Common Stock without any action required by the
Company or any other Person), the Conversion Price in effect at the opening of
business on the day following the date fixed for such determination shall be
reduced by multiplying such Conversion Price by a fraction of which the
numerator shall be the number of shares of Common Stock outstanding at the
close of business on the date fixed for such determination plus the number of
shares of Common Stock which the aggregate of the offering price of the total
number of shares of Common Stock so offered for subscription or purchase would
purchase at such current market price and the denominator shall be the number
of shares of Common Stock outstanding at the close of business on the date
fixed for such determination plus the number of shares of Common Stock so
offered for subscription or purchase, such reduction to become effective
immediately after the opening of business on the day following the date fixed
for such determination. If, after any such date fixed for determination, any
such rights, options or warrants are not in fact issued, the Conversion Price
shall be immediately readjusted, effective as of the date the Board of
Directors determines not to issue such rights, options or warrants, to the
Conversion Price that would have been in effect if such determination date had
not been fixed. For the purposes of this paragraph (2), the number of shares of
Common Stock at any time outstanding shall not include shares held in the
treasury of the Company but shall include shares issuable in respect of scrip
certificates issued in lieu of fractions of shares of Common Stock. The Company
will not issue any rights, options or warrants in respect of shares of Common
Stock held in the treasury of the Company.





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<PAGE>   102



         (3) In case outstanding shares of Common Stock shall be subdivided
into a greater number of shares of Common Stock, the Conversion Price in effect
at the opening of business on the day following the day upon which such
subdivision becomes effective shall be proportionately reduced, and,
conversely, in case outstanding shares of Common Stock shall each be combined
into a smaller number of shares of Common Stock, the Conversion Price in effect
at the opening of business on the day following the day upon which such
combination becomes effective shall be proportionately increased, such
reduction or increase, as the case may be, to become effective immediately
after the opening of business on the day following the day upon which such sub
division or combination becomes effective.

         (4) In case the Company shall, by dividend or otherwise, distribute to
all holders of its Common Stock evidences of its indebtedness, shares of any
class of capital stock, or other property (including securities, but excluding
(i) any rights, options or warrants referred to in paragraph (2) of this
Section, (ii) any dividend or distribution paid exclusively in cash, (iii) any
dividend or distribution referred to in paragraph (1) of this Section and (iv)
any merger or consolidation to which Section 12.11 applies), the Conversion
Price shall be adjusted so that the same shall equal the price determined by
dividing the Conversion Price in effect immediately prior to the close of
business on the date fixed for the determination of stockholders entitled to
receive such distribution by a fraction of which the numerator shall be the
current market price per share (determined as provided in paragraph (8) of this
Section 12.4) of the Common Stock on the date fixed for such determination less
the then fair market value (as determined by the Board of Directors, whose
determination shall be conclusive and described in a Board Resolution filed
with the Trustee) of the portion of the assets, shares or evidences of
indebtedness so distributed applicable to one share of Common Stock and the
denominator shall be such current market price per share of the Common Stock,
such adjustment to become effective immediately prior to the opening of
business on the day following the date fixed for the determination of
stockholders entitled to receive such distribution. If, after any such date
fixed for determination, any such distribution is not in fact made, the
Conversion Price shall be immediately readjusted, effective as of the date the
Board of Directors determines not to make such distribution, to the Conversion
Price that would have been in effect if such determination date had not been
fixed.

         (5) In case the Company shall, by dividend or otherwise, distribute to
all holders of its Common Stock cash (excluding any cash that is distributed
upon a merger or consolidation to which Section 12.11 applies or as part of a
distribution referred to in paragraph (4) of this Section) in an aggregate
amount that, combined together with (I) the aggregate amount of any other cash
distributions to all holders of its Common Stock made exclusively in cash
within the 12 months preceding the date of payment of such distribution and in
respect of which no adjustment pursuant to this paragraph (5) has been made and
(II) the aggregate of any cash plus the fair market value (as determined by the
Board of Directors, whose determination shall be conclusive and described in a
Board Resolution) of consideration payable in respect of any tender offer by
the Company or any of its subsidiaries for all or any portion of the Common
Stock concluded within the 12 months preceding the date of payment of such
distribution and in respect of which no adjustment pursuant to paragraph (6) of
this Section 12.4 has been made (the




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<PAGE>   103



"combined cash and tender amount") exceeds 12.5% of the product of the current
market price per share (determined as provided in paragraph (8) of this Section
12.4) of the Common Stock on the date for the determination of holders of
shares of Common Stock entitled to receive such distribution times the number
of shares of Common Stock outstanding on such date (the "aggregate current
market price"), then, and in each such case, immediately after the close of
business on such date for determination, the Conversion Price shall be adjusted
so that the same shall equal the price determined by dividing the Conversion
Price in effect immediately prior to the close of business on the date fixed
for determination of the stockholders entitled to receive such distribution by
a fraction (i) the numerator of which shall be equal to the current market
price per share (determined as provided in paragraph (8) of this Section) of
the Common Stock on the date fixed for such determination less an amount equal
to the quotient of (x) the excess of such combined cash and tender amount over
such aggregate current market price divided by (y) the number of shares of
Common Stock outstanding on such date for determination and (ii) the
denominator of which shall be equal to the current market price per share
(determined as provided in paragraph (8) of this Section 12.4) of the Common
Stock on such date for determination.

         (6) In case a tender offer made by the Company or any Subsidiary for
all or any portion of the Common Stock shall expire and such tender offer (as
amended upon the expiration thereof) shall require the payment to stockholders
(based on the acceptance (up to any maximum specified in the terms of the
tender offer) of Purchased Shares (as defined below)) of an aggregate
consideration having a fair market value (as determined by the Board of
Directors, whose determination shall be conclusive and described in a Board
Resolution) that combined together with (I) the aggregate of the cash plus the
fair market value (as determined by the Board of Directors, whose determination
shall be conclusive and described in a Board Resolution), as of the expiration
of such tender offer, of consideration payable in respect of any other tender
offer by the Company or any Subsidiary for all or any portion of the Common
Stock expiring within the 12 months preceding the expiration of such tender
offer and in respect of which no adjustment pursuant to this paragraph (6) has
been made and (II) the aggregate amount of any cash distributions to all
holders of the Company's Common Stock within 12 months preceding the expiration
of such tender offer and in respect of which no adjustment pursuant to
paragraph (5) of this Section has been made (the "combined tender and cash
amount") exceeds 12.5% of the product of the current market price per share of
the Common Stock (determined as provided in paragraph (8) of this Section 12.4)
as of the last time (the "Expiration Time") tenders could have been made
pursuant to such tender offer (as it may be amended) times the number of shares
of Common Stock outstanding (including any tendered shares) as of the
Expiration Time, then, and in each such case, immediately prior to the opening
of business on the day after the date of the Expiration Time, the Conversion
Price shall be adjusted so that the same shall equal the price determined by
dividing the Conversion Price immediately prior to close of business on the
date of the Expiration Time by a fraction (i) the numerator of which shall be
equal to (A) the product of (I) the current market price per share of the
Common Stock (determined as provided in paragraph (8) of this Section 12.4) on
the date of the Expiration Time multiplied by (II) the number of shares of
Common Stock outstanding (including any tendered shares) on the Expiration Time
less (B) the combined tender and cash amount, and (ii) the denominator of which
shall be




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<PAGE>   104



equal to the product of (A) the current market price per share of the Common
Stock (determined as provided in paragraph (8) of this Section 12.4) as of the
Expiration Time multiplied by (B) the number of shares of Common Stock
outstanding (including any tendered shares) as of the Expiration Time less the
number of all shares validly tendered and not withdrawn as of the Expiration
Time (the shares deemed so accepted up to any such maximum, being referred to
as the "Purchased Shares").

         (7) The reclassification of Common Stock into securities including
other than Common Stock (other than any reclassification upon a consolidation
or merger to which Section 12.11 applies) shall be deemed to involve (a) a
distribution of such securities other than Common Stock to all holders of
Common Stock (and the effective date of such reclassification shall be deemed
to be "the date fixed for the determination of stockholders entitled to receive
such distribution" and "the date fixed for such determination" within the
meaning of paragraph (4) of this Section), and (b) a subdivision or
combination, as the case may be, of the number of shares of Common Stock
outstanding immediately prior to such reclassification into the number of
shares of Common Stock outstanding immediately thereafter (and the effective
date of such reclassification shall be deemed to be "the day upon which such
subdivision becomes effective" or "the day upon which such combination becomes
effective", as the case may be, and "the day upon which such subdivision or
combination becomes effective" within the meaning of paragraph (3) of this
Section 12.4).

         (8) For the purpose of any computation under paragraphs (2), (4), (5)
or (6) of this Section 12.4, the current market price per share of Common Stock
on any date shall be calculated by the Company and be deemed to be the average
of the daily Closing Prices Per Share for the five consecutive Trading Days
selected by the Company commencing not more than 10 Trading Days before, and
ending not later than, the earlier of the day in question and the day before
the "ex" date with respect to the issuance or distribution requiring such
computation. For purposes of this paragraph, the term "'ex' date", when used
with respect to any issuance or distribution, means the first date on which the
Common Stock trades regular way in the applicable securities market or on the
applicable securities exchange without the right to receive such issuance or
distribution.

         (9) No adjustment in the Conversion Price shall be required unless
such adjustment (plus any adjustments not previously made by reason of this
paragraph (9)) would require an increase or decrease of at least one percent in
such rate; provided, however, that any adjustments which by reason of this
paragraph (9) are not required to be made shall be carried forward and taken
into account in any subsequent adjustment. All calculations under this Article
shall be made to the nearest cent or to the nearest one-hundredth of a share,
as the case may be.

         (10) The Company may make such reductions in the Conversion Price, for
the remaining term of the Securities or any shorter term, in addition to those
required by paragraphs (1), (2), (3), (4), (5) and (6) of this Section 12.4, as
it considers to be advisable in order to avoid or diminish any income tax to
any holders of shares of Common Stock resulting from any dividend or
distribution of stock or issuance of rights or warrants to purchase or
subscribe for stock or from




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any event treated as such for income tax purposes. The Company shall have the
power to resolve any ambiguity or correct any error in this paragraph (10) and
its actions in so doing shall, absent manifest error, be final and conclusive.

SECTION 12.5. Notice of Adjustments of Conversion Price.

         Whenever the Conversion Price is adjusted as herein provided:

         (1) the Company shall compute the adjusted Conversion Price in
     accordance with Section 12.4 and shall prepare a certificate signed by the
     Chief Financial Officer of the Company setting forth the adjusted
     Conversion Price and showing in reasonable detail the facts upon which
     such adjustment is based, and such certificate shall promptly be filed
     with the Trustee and with each Conversion Agent; and

         (2) upon each such adjustment, a notice stating that the Conversion
     Price has been adjusted and setting forth the adjusted Conversion Price
     shall be required, and as soon as practicable after it is required, such
     notice shall be provided by the Company to all Holders in accordance with
     Section 1.6.

Neither the Trustee nor any Conversion Agent shall be under any duty or
responsibility with respect to any such certificate or the information and
calculations contained therein, except to exhibit the same to any Holder of
Securities desiring inspection thereof at its office during normal business
hours.

SECTION 12.6. Notice of Certain Corporate Action.

         In case:

         (a) the Company shall declare a dividend (or any other distribution)
     on its Common Stock payable (i) otherwise than exclusively in cash or (ii)
     exclusively in cash in an amount that would require any adjustment
     pursuant to Section 12.4; or

         (b) the Company shall authorize the granting to the holders of its
     Common Stock of rights, options or warrants to subscribe for or purchase
     any shares of capital stock of any class or of any other rights; or

         (c) of any reclassification of the Common Stock of the Company, or of
     any consolidation, merger or share exchange to which the Company is a
     party and for which approval of any stockholders of the Company is
     required, or of the conveyance, sale, transfer or lease of all or
     substantially all of the assets of the Company; or





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<PAGE>   106



         (d) of the voluntary or involuntary dissolution, liquidation or
     winding up of the Company;

then the Company shall cause to be filed at each office or agency maintained
for the purpose of conversion of Securities pursuant to Section 10.2, and shall
cause to be provided to all Holders in accordance with Section 1.6, at least 20
days (or 10 days in any case specified in clause (a) or (b) above) prior to the
applicable record or effective date hereinafter specified, a notice stating (x)
the date on which a record is to be taken for the purpose of such dividend,
distribution, rights, options or warrants, or, if a record is not to be taken,
the date as of which the holders of Common Stock of record to be entitled to
such dividend, distribution, rights, options or warrants are to be determined
or (y) the date on which such reclassification, consolidation, merger,
conveyance, transfer, sale, lease, dissolution, liquidation or winding up is
expected to become effective, and the date as of which it is expected that
holders of Common Stock of record shall be entitled to exchange their shares of
Common Stock for securities, cash or other property deliverable upon such
reclassification, consolidation, merger, conveyance, transfer, sale, lease,
dissolution, liquidation or winding up. Neither the failure to give such notice
or the notice referred to in the following paragraph nor any defect therein
shall affect the legality or validity of the proceedings described in clauses
(a) through (d) of this Section 12.6. If at the time the Trustee shall not be
the conversion agent, a copy of such notice shall also forthwith be filed by
the Company with the Trustee.

         The Company shall cause to be filed at each office or agency
maintained for the purpose of conversion of Securities pursuant to Section
10.2, and shall cause to be provided to all Holders in accordance with Section
1.6, notice of any tender offer by the Company or any Subsidiary for all or any
portion of the Common Stock at or about the time that such notice of tender
offer is provided to the public generally.

SECTION 12.7. Company to Reserve Common Stock.

         The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Stock, for the
purpose of effecting the conversion of Securities, the full number of shares of
Common Stock then issuable upon the conversion of all Outstanding Securities.

SECTION 12.8. Taxes on Conversions.

         Except as provided in the next sentence, the Company will pay any and
all taxes and duties that may be payable in respect of the issue or delivery of
shares of Common Stock on conversion of Securities pursuant hereto. The Company
shall not, however, be required to pay any tax or duty which may be payable in
respect of any transfer involved in the issue and delivery of shares of Common
Stock in a name other than that of the Holder of the Security or Securities to
be converted, and no such issue or delivery shall be made unless and until the
Person requesting




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such issue has paid to the Company the amount of any such tax or duty, or has
established to the satisfaction of the Company that such tax or duty has been
paid.

SECTION 12.9. Covenant as to Common Stock.

         The Company agrees that all shares of Common Stock which may be
delivered upon conversion of Securities, upon such delivery, will have been
duly authorized and validly issued and will be fully paid and nonassessable
and, except as provided in Section 12.8, the Company will pay all taxes, liens
and charges with respect to the issue thereof.

SECTION 12.10. Cancellation of Converted Securities.

         All Securities delivered for conversion shall be delivered to the
Trustee or its agent to be canceled by or at the direction of the Trustee,
which shall dispose of the same as provided in Section 3.9.

SECTION 12.11. Provision in Case of Consolidation, Merger or Sale of Assets.

         In case of any consolidation or merger of the Company with or into any
other Person, any merger of another Person with or into the Company (other than
a merger which does not result in any reclassification, conversion, exchange or
cancellation of outstanding shares of Common Stock of the Company) or any
conveyance, sale, transfer or lease of all or substantially all of the assets
of the Company, the Person formed by such consolidation or resulting from such
merger or which acquires such assets, as the case may be, shall execute and
deliver to the Trustee a supplemental indenture providing that the Holder of
each Security then Outstanding shall have the right thereafter, during the
period such Security shall be convertible as specified in Section 12.1, to
convert such Security only into the kind and amount of securities, cash and
other property receivable upon such consolidation, merger, conveyance, sale,
transfer or lease by a holder of the number of shares of Common Stock of the
Company into which such Security might have been converted immediately prior to
such consolidation, merger, conveyance, sale, transfer or lease, assuming such
holder of Common Stock of the Company (i) is not a Person with which the
Company consolidated or merged with or into or which merged into or with the
Company or to which such conveyance, sale, transfer or lease was made, as the
case may be ("Constituent Person"), or an Affiliate of a Constituent Person and
(ii) failed to exercise his rights of election, if any, as to the kind or
amount of securities, cash and other property receivable upon such
consolidation, merger, conveyance, sale, transfer or lease (provided that if
the kind or amount of securities, cash and other property receivable upon such
consolidation, merger, conveyance, sale, transfer, or lease is not the same for
each share of Common Stock of the Company held immediately prior to such
consolidation, merger, conveyance, sale, transfer or lease by others than a
Constituent Person or an Affiliate thereof and in respect of which such rights
of election shall not have been exercised ("Non-electing Share"), then for the
purpose of this Section 12.11 the kind and amount of securities, cash and other
property receivable upon such consolidation, merger, conveyance, sale, transfer
or lease by the holders of each Non-electing Share shall be




                                    -97-

<PAGE>   108



deemed to be the kind and amount so receivable per share by a plurality of the
Non-electing Shares), and further assuming, if such consolidation, merger,
conveyance, transfer, sale or lease occurs prior to the 90th day following the
last original issue date of the Securities, that the Security was convertible
at the time of such occurrence at the Conversion Rate specified in Section 12.1
as adjusted from the issue date of such Security to such time as provided in
this Article Twelve. Such supplemental indenture shall provide for adjustments
which, for events subsequent to the effective date of such supplemental
indenture, shall be as nearly equivalent as may be practicable to the
adjustments provided for in this Article. The above provisions of this Section
12.11 shall similarly apply to successive consolidations, mergers, conveyances,
sales, transfers or leases. Notice of the execution of such a supplemental
indenture shall be given by the Company to the Holder of each Security as
provided in Section 1.6 promptly upon such execution.

         Neither the Trustee nor any Conversion Agent shall be under any
responsibility to determine the correctness of any provisions contained in any
such supplemental indenture relating either to the kind or amount of shares of
stock or other securities or property or cash receivable by Holders of
Securities upon the conversion of their Securities after any such
consolidation, merger, conveyance, transfer, sale or lease or to any such
adjustment, but may accept as conclusive evidence of the correctness of any
such provisions, and shall be protected in relying upon, an Opinion of Counsel
with respect thereto, which the Company shall cause to be furnished to the
Trustee upon request.

SECTION 12.12. Responsibility of Trustee for Conversion Provisions.

         The Trustee, subject to the provisions of Section 6.1, and any
Conversion Agent shall not at any time be under any duty or responsibility to
any Holder of Securities to determine whether any facts exist which may require
any adjustment of the Conversion Rate, or with respect to the nature or extent
of any such adjustment when made, or with respect to the method employed, or
herein or in any supplemental indenture provided to be employed, in making the
same, or whether a supplemental indenture need be entered into. Neither the
Trustee, subject to the provisions of Section 6.1, nor any Conversion Agent
shall be accountable with respect to the validity or value (or the kind or
amount) of any Common Stock, or of any other securities or property or cash,
which may at any time be issued or delivered upon the conversion of any
Security; and it or they do not make any representation with respect thereto.
Neither the Trustee, subject to the provisions of Section 6.1, nor any
Conversion Agent shall be responsible for any failure of the Company to make or
calculate any cash payment or to issue, transfer or deliver any shares of
Common Stock or share certificates or other securities or property or cash upon
the surrender of any Security for the purpose of conversion; and the Trustee,
subject to the provisions of Section 6.1, and any Conversion Agent shall not be
responsible for any failure of the Company to comply with any of the covenants
of the Company contained in this Article.





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<PAGE>   109



                                ARTICLE THIRTEEN

                          SUBORDINATION OF SECURITIES


SECTION 13.1. Securities Subordinate to Senior Indebtedness.

         The Company covenants and agrees, and each Holder of a Security, by
his acceptance thereof, likewise covenants and agrees, that, to the extent and
in the manner hereinafter set forth in this Article (subject to the provisions
of Article Four), the indebtedness represented by the Securities and the
payment of the principal of (and premium, if any) and interest on, and any
payment of the Repurchase Price with respect to, each and all of the Securities
are hereby expressly made subordinate and subject in right of payment to the
prior payment in full of all Senior Indebtedness.

SECTION 13.2. Payment Over of Proceeds Upon Dissolution, Etc.

         In the event of (a) any insolvency or bankruptcy case or proceeding,
or any receivership, liquidation, reorganization or other similar case or
proceeding in connection therewith, relative to the Company or to its
creditors, as such, or to its assets, or (b) any liquidation, dissolution or
other winding up of the Company, whether voluntary or involuntary and whether
or not involving insolvency or bankruptcy, or (c) any assignment for the
benefit of creditors or any other marshaling of assets and liabilities of the
Company, then and in any such event the holders of Senior Indebtedness shall be
entitled to receive payment in full of all amounts due or to become due on or
in respect of all Senior Indebtedness in cash before the Holders of the
Securities are entitled to receive any payment on account of principal of (or
premium, if any) or interest (including any Liquidated Damages) on the
Securities or on account of the purchase, redemption or other acquisition of
Securities, and to that end the holders of Senior Indebtedness shall be
entitled to receive, for application to the payment thereof, any payment or
distribution of any kind or character, whether in cash, property or securities,
which may be payable or deliverable in respect of the Securities in any such
case, proceeding, dissolution, liquidation or other winding up or event.

         In the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment or distribution of assets of the Company of any kind or character,
whether in cash, securities or other property, before all Senior Indebtedness
is paid in full, and if such fact shall, at or prior to the time of such
payment or distribution, have been made known to the Trustee or, as the case
may be, such Holder, then and in such event such payment or distribution shall
be paid over or delivered forthwith to the trustee in bankruptcy, receiver,
liquidating trustee, custodian, assignee, agent or other Person making payment
or distribution of assets of the Company for application to the payment of all




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<PAGE>   110



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

         For purposes of this Article only, the words "cash, securities or
other property" shall not be deemed to include shares of stock of the Company
as reorganized or readjusted, or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment, which
shares of stock or securities are subordinated in right of payment to all then
outstanding Senior Indebtedness to substantially the same extent as, or to a
greater extent than, the Securities are so subordinated as provided in this
Article. The consolidation of the Company with, or the merger of the Company
into, another Person or the liquidation or dissolution of the Company following
the conveyance or transfer of its properties and assets substantially as an
entirety to another Person upon the terms and conditions set forth in Article
Seven shall not be deemed a dissolution, winding up, liquidation,
reorganization, assignment for the benefit of creditors or marshaling of assets
and liabilities of the Company for the purposes of this Section if the Person
formed by such consolidation or into which the Company is merged or which
acquires by conveyance or transfer such properties and assets substantially as
an entirety, as the case may be, shall, as a part of such consolidation,
merger, conveyance or transfer, comply with the conditions set forth in Article
Seven.

SECTION 13.3. No Payment When Senior Indebtedness in Default.

         (a) In the event and during the continuation of any default in the
payment of principal of (or premium, if any) or interest on (including a
default under any redemption or repurchase obligation with respect to) any
Senior Indebtedness beyond any applicable grace period with respect thereto or
in the event that any other event of default with respect to any Senior
Indebtedness shall have occurred and be continuing which would then permit the
holders of such Senior Indebtedness to declare such Senior Indebtedness due and
payable prior to the date on which it would otherwise have become due and
payable, unless and until such event of default shall have been cured or waived
or shall have ceased to exist after written notice to the Company and the
Trustee by any holder of such Senior Indebtedness, or any trustee, agent or
representative therefor or (b) in the event any judicial proceeding shall be
pending with respect to any such default in payment or event of default, then
no payment shall be made by the Company on account of principal of (or premium,
if any) or interest (including Liquidated Damages) on the Securities or on
account of the purchase, redemption or other acquisition of Securities.

         In the event that, notwithstanding the foregoing, the Company shall
make any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section, and if such fact shall, at or prior to
the time of such payment, have been made known to the Trustee or, as the case
may be, such Holder, then and in such event such payment shall be paid over and
delivered forthwith to the Company, in the case of the Trustee, or the Trustee,
in the case of such Holder.





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<PAGE>   111



         The provisions of this Section shall not apply to any payment with
respect to which Section 13.2 would be applicable.

SECTION 13.4. Payment Permitted If No Default.

         Nothing contained in this Article or elsewhere in this Indenture or in
any of the Securities shall prevent (a) the Company, at any time except during
the pendency of any case, proceeding, dissolution, liquidation or other winding
up, assignment for the benefit of creditors or other marshaling of assets and
liabilities of the Company referred to in Section 13.2 or under the conditions
described in Section 13.3, from making payments at any time of principal of
(and premium, if any) or interest on the Securities, or (b) the application by
the Trustee of any money deposited with it hereunder to the payment of or on
account of the principal of (and premium, if any) or interest on the Securities
or the retention of such payment by the Holders, if, at the time of such
application by the Trustee, it did not have knowledge that such payment would
have been prohibited by the provisions of this Article.

SECTION 13.5. Subrogation to Rights of Holders of Senior Indebtedness.

         Subject to the payment in full of all Senior Indebtedness, the Holders
of the Securities shall be subrogated to the extent of the payments or
distributions made to the holders of such Senior Indebtedness pursuant to the
provisions of this Article to the rights of the holders of such Senior
Indebtedness to receive payments and distributions of cash, property and
securities applicable to the Senior Indebtedness until the principal of (and
premium, if any) and interest on the Securities shall be paid in full. For
purposes of such subrogation, no payments or distributions to the holders of
the Senior Indebtedness of any cash, property or securities to which the
Holders of the Securities or the Trustee would be entitled except for the
provisions of this Article, and no payments over pursuant to the provisions of
this Article to the holders of Senior Indebtedness by Holders of the Securities
or the Trustee, shall, as among the Company, its creditors other than holders
of Senior Indebtedness and the Holders of the Securities, be deemed to be a
payment or distribution by the Company to or on account of the Senior
Indebtedness.

SECTION 13.6. Provisions Solely to Define Relative Rights.

         The provisions of this Article are and are intended solely for the
purpose of defining the relative rights of the Holders of the Securities on the
one hand and the holders of Senior Indebtedness on the other hand. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities
is intended to or shall (a) impair, as among the Company, its creditors other
than holders of Senior Indebtedness and the Holders of the Securities, the
obligation of the Company, which is absolute and unconditional, to pay to the
Holders of the Securities the principal of (and premium, if any) and interest
on the Securities as and when the same shall become due and payable in
accordance with their terms; or (b) affect the relative rights against the
Company of the Holders of the Securities and creditors of the Company other
than the holders of Senior Indebtedness; or (c) prevent the Trustee or the
Holder of any Security from exercising all




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<PAGE>   112



remedies otherwise permitted by applicable law upon default under this
Indenture, subject to the rights, if any, under this Article of the holders of
Senior Indebtedness to receive cash, property and securities otherwise payable
or deliverable to the Trustee or such Holder.

SECTION 13.7. Trustee to Effectuate Subordination.

         Each holder of a Security by his acceptance thereof authorizes and
directs the Trustee on his behalf to take such action as may be necessary or
appropriate to effectuate the subordination provided in this Article and
appoints the Trustee his attorney-in-fact for any and all such purposes.

SECTION 13.8. No Waiver of Subordination Provisions.

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

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

SECTION 13.9. Notice to Trustee.

         The Company shall give prompt written notice to the Trustee of any
fact known to the Company which would prohibit the making of any payment to or
by the Trustee in respect of the Securities. Notwithstanding the provisions of
this Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until the Trustee shall have received written notice thereof from the
Company or a holder of Senior Indebtedness or from any trustee, agent or
representative therefor; and, prior to the receipt of any such written notice,
the Trustee, subject to the provisions of Section 6.1, shall be entitled




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<PAGE>   113



in all respects to assume that no such facts exist; provided, however, that if
the Trustee shall not have received the notice provided for in this Section
13.9 prior to the date upon which by the terms hereof any money may become
payable for any purpose (including, without limitation, the payment of the
principal of (and premium, if any) or interest on any Security), then, anything
herein contained to the contrary notwithstanding, the Trustee shall have full
power and authority to receive such money and to apply the same to the purpose
for which such money was received and shall not be affected by any notice to
the contrary which may be received by it within two Business Days prior to such
date.

         Subject to the provisions of Section 6.1, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness (or a trustee, agent
or representative therefor) to establish that such notice has been given by a
holder of Senior Indebtedness (or a trustee, agent or representative therefor).
In the event that the Trustee determines in good faith that further evidence is
required with respect to the right of any Person as a holder of Senior
Indebtedness to participate in any payment or distribution pursuant to this
Article, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Indebtedness
held by such Person, the extent to which such Person is entitled to participate
in such payment or distribution and any other facts pertinent to the rights of
such Person under this Article, and if such evidence is not furnished, the
Trustee may defer any payment to such Person pending judicial determination as
to the right of such Person to receive such payment.

SECTION 13.10. Reliance on Judicial Order or Certificate of Liquidating Agent.

         Upon any payment or distribution of assets of the Company referred to
in this Article, the Trustee, subject to the provisions of Section 6.1, and the
Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this
Article.

SECTION 13.11. Trustee Not Fiduciary for Holders of Senior Indebtedness.

         The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Indebtedness and shall not be liable to any such holders if
it shall in good faith mistakenly pay over or distribute to Holders of
Securities or to the Company or to any other Person cash, property or
securities to which any holders of Senior Indebtedness shall be entitled by
virtue of this Article or otherwise.




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<PAGE>   114



SECTION 13.12. Reliance by Holders of Senior Indebtedness on Subordination
               Provisions.

         Each Holder by accepting a Security acknowledges and agrees that the
foregoing subordination provisions are, and are intended to be, an inducement
and a consideration to each holder of any Senior Indebtedness, whether such
Senior Indebtedness was created or acquired before or after the issuance of the
Securities, to acquire and continue to hold, or to continue to hold, such
Senior Indebtedness and such holder of Senior Indebtedness shall be deemed
conclusively to have relied on such subordination provisions in acquiring and
continuing to hold, or in continuing to hold, such Senior Indebtedness.

SECTION 13.13. Rights of Trustee as Holder of Senior Indebtedness; Preservation
               of Trustee's Rights.

         The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article with respect to any Senior Indebtedness which
may at any time be held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder.

         Nothing in this Article shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 6.7.

SECTION 13.14. Article Applicable to Paying Agents.

         In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article in addition to or in place of the Trustee; provided,
however, that Section 13.13 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

SECTION 13.15. Certain Conversions and Repurchases Deemed Payment.

         For the purposes of this Article only, (1) the issuance and delivery
of junior securities upon conversion of Securities in accordance with Article
Twelve or upon the repurchase of Securities in accordance with Article Fourteen
shall not be deemed to constitute a payment or distribution on account of the
principal of or premium or interest on Securities or on account of the purchase
or other acquisition of Securities, and (2) the payment, issuance or delivery
of cash, property or securities (other than junior securities) upon conversion
of a Security shall be deemed to constitute payment on account of the principal
of such Security. For the purposes of this Section, the term "junior
securities" means (a) shares of any stock of any class of the Company and any
cash, property or securities into which the Securities are convertible pursuant
to Article Twelve and (b) securities of the Company which are subordinated in
right of payment to all Senior




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<PAGE>   115



Indebtedness which may be outstanding at the time of issuance or delivery of
such securities to substantially the same extent as, or to a greater extent
than, the Securities are so subordinated as provided in this Article. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities
is intended to or shall impair, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, the right,
which is absolute and unconditional, of the Holder of any Security to convert
such Security in accordance with Article Twelve or to exchange such Security
for Common Stock in accordance with Article Fourteen if the Company elects to
satisfy the obligations under Article Fourteen by the delivery of Common Stock.




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                                ARTICLE FOURTEEN

                 REPURCHASE OF SECURITIES AT THE OPTION OF THE
                        HOLDER UPON A CHANGE IN CONTROL


SECTION 14.1. Right to Require Repurchase.

         In the event that a Change in Control (as hereinafter defined) shall
occur, then each Holder shall have the right, at the Holder's option, but
subject to the provisions of Section 14.2, to require the Company to
repurchase, and upon the exercise of such right the Company shall repurchase,
all of such Holder's Securities not theretofore called for redemption, or any
portion of the principal amount thereof that is equal to U.S.$5,000 or any
integral multiple of U.S.$1,000 in excess thereof (provided that no single
Security may be repurchased in part unless the portion of the principal amount
of such Security to be Outstanding after such repurchase is equal to U.S.$5,000
or integral multiples of U.S.$1,000 in excess thereof), on the date (the
"Repurchase Date") that is 45 days after the date of the Company Notice (as
defined in Section 14.3) at a purchase price equal to 100% of the principal
amount of the Securities to be repurchased plus interest accrued to the
Repurchase Date (the "Repurchase Price"); provided, however, that installments
of interest on Securities whose Stated Maturity is on or prior to the
Repurchase Date shall be payable to the Holders of such Securities, or one or
more Predecessor Securities, registered as such on the relevant Record Date
according to their terms and the provisions of Section 3.7. Such right to
require the repurchase of the Securities shall not continue after a discharge
of the Company from its obligations with respect to the Securities in
accordance with Article Four, unless a Change in Control shall have occurred
prior to such discharge. At the option of the Company, the Repurchase Price may
be paid in cash or, subject to the fulfillment by the Company of the conditions
set forth Section 14.2, by delivery of shares of Common Stock having a fair
market value equal to the Repurchase Price. Whenever in this Indenture
(including Sections 2.2, 3.1, 5.1(1) and 5.8) there is a reference, in any
context, to the principal of any Security as of any time, such reference shall
be deemed to include reference to the Repurchase Price payable in respect of
such Security to the extent that such Repurchase Price is, was or would be so
payable at such time, and express mention of the Repurchase Price in any
provision of this Indenture shall not be construed as excluding the Repurchase
Price in those provisions of this Indenture when such express mention is not
made; provided, however, that for the purposes of Article Thirteen such
reference shall be deemed to include reference to the Repurchase Price only to
the extent the Repurchase Price is payable in cash.

SECTION 14.2. Conditions to the Company's Election to Pay the Repurchase Price
              in Common Stock.

         The Company may elect to pay the Repurchase Price by delivery of
shares of Common Stock pursuant to Section 14.1 if and only if the following
conditions shall have been satisfied:





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<PAGE>   117



         (a) The shares of Common Stock deliverable in payment of the
Repurchase Price shall have a fair market value as of the Repurchase Date of
not less than the Repurchase Price. For purposes of Section 14.1 and this
Section 14.2, the fair market value of shares of Common Stock shall be
determined by the Company and shall be equal to 95% of the average of the
Closing Prices Per Share for the five consecutive Trading Days immediately
preceding the second Trading Day prior to the Repurchase Date;

         (b) The Repurchase Price shall be paid only in cash in the event any
shares of Common Stock to be issued upon repurchase of Securities hereunder (i)
require registration under any federal securities law before such shares may be
freely transferrable without being subject to any transfer restrictions under
the Securities Act upon repurchase and if such registration is not completed or
does not become effective prior to the Repurchase Date, and/or (ii) require
registration with or approval of any governmental authority under any state law
or any other federal law before such shares may be validly issued or delivered
upon repurchase and if such registration is not completed or does not become
effective or such approval is not obtained prior to the Repurchase Date;

         (c) Payment of the Repurchase Price may not be made in Common Stock
unless such stock is, or shall have been, approved for quotation on the Nasdaq
National Market or listed on a national securities exchange, in either case,
prior to the Repurchase Date; and

         (d) All shares of Common Stock which may be issued upon repurchase of
Securities will be issued out of the Company's authorized but unissued Common
Stock and, will upon issue, be duly and validly issued and fully paid and
non-assessable and free of any preemptive rights.

         If all of the conditions set forth in this Section 14.2 are not
satisfied in accordance with the terms thereof, the Repurchase Price shall be
paid by the Company only in cash.

SECTION 14.3. Notices; Method of Exercising Repurchase Right, Etc.

         (a) Unless the Company shall have theretofore called for redemption
all of the Outstanding Securities, on or before the 30th day after the
occurrence of a Change in Control, the Company or, at the request and expense
of the Company on or before the 15th day after such occurrence, the Trustee,
shall give to all Holders of Securities, in the manner provided in Section 1.6,
notice (the "Company Notice") of the occurrence of the Change of Control and of
the repurchase right set forth herein arising as a result thereof. The Company
shall also deliver a copy of such notice of a repurchase right to the Trustee.

         Each notice of a repurchase right shall state:

         (1) the Repurchase Date,

         (2) the date by which the repurchase right must be exercised,




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<PAGE>   118



         (3) the Repurchase Price, and whether the Repurchase Price shall be
     paid by the Company in cash or by delivery of shares of Common Stock,

         (4) a description of the procedure which a Holder must follow to
     exercise a repurchase right, and the place or places where such
     Securities, are to be surrendered for payment of the Repurchase Price and
     accrued interest, if any,

         (5) that on the Repurchase Date the Repurchase Price, and accrued
     interest, if any, will become due and payable upon each such Security
     designated by the Holder to be repurchased, and that interest thereon
     shall cease to accrue on and after said date,

         (6) the Conversion Rate then in effect, the date on which the right to
     convert the principal amount of the Securities to be repurchased will
     terminate and the place or places where such Securities may be surrendered
     for conversion, and

         (7) the place or places that the certificate required by Section 2.2
     shall be delivered, and the form of such certificate and the place or
     places that the Surrender Certificate required by Section 14.3(i) shall be
     delivered.

         In addition, at least two Business Days preceding the Repurchase Date,
the Company shall give to all Holders of the Securities, in the manner provided
in Section 1.6, notice specifying whether the Repurchase Price will be payable
in cash or shares of common stock and shall deliver a copy of such notice to
the Trustee.

         No failure of the Company to give the foregoing notices or defect
therein shall limit any Holder's right to exercise a repurchase right or affect
the validity of the proceedings for the repurchase of Securities.

         If any of the foregoing provisions or other provisions of this Article
Fourteen are inconsistent with applicable law, such law shall govern.

         (b) To exercise a repurchase right, a Holder shall deliver to the
Trustee on or before the 30th day after the date of the Company Notice (i)
written notice of the Holder's exercise of such right, which notice shall set
forth the name of the Holder, the principal amount of the Securities to be
repurchased (and, if any Security is to repurchased in part, the serial number
thereof, the portion of the principal amount thereof to be repurchased and the
name of the Person in which the portion thereof to remain Outstanding after
such repurchase is to be registered) and a statement that an election to
exercise the repurchase right is being made thereby, and, in the event that the
Repurchase Price shall be paid in shares of Common Stock, the name or names
(with addresses) in which the certificate or certificates for shares of Common
Stock shall be issued, and (ii) the Securities with respect to which the
repurchase right is being exercised. Such written notice shall be irrevocable,
except that the right of the Holder to convert the Securities with




                                    -108-

<PAGE>   119



respect to which the repurchase right is being exercised shall continue until
the close of business on the Repurchase Date.

         (c) In the event a repurchase right shall be exercised in accordance
with the terms hereof, the Company shall pay or cause to be paid to the Trustee
the Repurchase Price in cash or shares of Common Stock, as provided above, for
payment to the Holder on the Repurchase Date or, if shares of Common Stock are
to be paid, as promptly after the Repurchase Date as practicable, together with
accrued and unpaid interest to the Repurchase Date payable with respect to the
Securities as to which the purchase right has been exercised; provided,
however, that installments of interest that mature on or prior to the
Repurchase Date shall be payable in cash to the Holders of such Securities, or
one or more Predecessor Securities, registered as such at the close of business
on the relevant Regular Record Date.

         (d) If any Security (or portion thereof) surrendered for repurchase
shall not be so paid on the Repurchase Date, the principal amount of such
Security (or portion thereof, as the case may be) shall, until paid, bear
interest to the extent permitted by applicable law from the Repurchase Date at
the rate of 7% per annum, and each Security shall remain convertible into
Common Stock until the principal of such Security (or portion thereof, as the
case may be) shall have been paid or duly provided for.

         (e) Any Security which is to be repurchased only in part shall be
surrendered to the Trustee (with, if the Company or the Trustee so requires,
due endorsement by, or a written instrument of transfer in form satisfactory to
the Company and the Trustee duly executed by, the Holder thereof or his
attorney duly authorized in writing), and the Company shall execute, and the
Trustee shall authenticate and make available for delivery to the Holder of
such Security without service charge, a new Security or Securities, containing
identical terms and conditions, each in an authorized denomination in aggregate
principal amount equal to and in exchange for the unrepurchased portion of the
principal of the Security so surrendered.

         (f) Any issuance of shares of Common Stock in respect of the
Repurchase Price shall be deemed to have been effected immediately prior to the
close of business on the Repurchase Date and the Person or Persons in whose
name or names any certificate or certificates for shares of Common Stock shall
be issuable upon such repurchase shall be deemed to have become on the
Repurchase Date the holder or holders of record of the shares represented
thereby; provided, however, that any surrender for repurchase on a date when
the stock transfer books of the Company shall be closed shall constitute the
Person or Persons in whose name or names the certificate or certificates for
such shares are to be issued as the record holder or holders thereof for all
purposes at the opening of business on the next succeeding day on which such
stock transfer books are open. No payment or adjustment shall be made for
dividends or distributions on any Common Stock issued upon repurchase of any
Security declared prior to the Repurchase Date.

         (g) No fractions of shares shall be issued upon repurchase of
Securities. If more than one Security shall be repurchased from the same Holder
and the Repurchase Price shall be




                                    -109-

<PAGE>   120



payable in shares of Common Stock, the number of full shares which shall be
issuable upon such repurchase shall be computed on the basis of the aggregate
principal amount of the Securities so repurchased. Instead of any fractional
share of Common Stock which would otherwise be issuable on the repurchase of
any Security or Securities, the Company will deliver to the applicable Holder
its check for the current market value of such fractional share. The current
market value of a fraction of a share is determined by multiplying the current
market price of a full share by the fraction, and rounding the result to the
nearest cent. For purposes of this Section, the current market price of a share
of Common Stock is the Closing Price Per Share of the Common Stock on the
Trading Day immediately preceding the Repurchase Date.

         (h) Any issuance and delivery of certificates for shares of Common
Stock on repurchase of Securities shall be made without charge to the Holder of
Securities being repur chased for such certificates or for any tax or duty in
respect of the issuance or delivery of such certificates or the securities
represented thereby; provided, however, that the Company shall not be required
to pay any tax or duty which may be payable in respect of (i) income of the
Holder or (ii) any transfer involved in the issuance or delivery of
certificates for shares of Common Stock in a name other than that of the Holder
of the Securities being repurchased, and no such issuance or delivery shall be
made unless and until the Person requesting such issuance or delivery has paid
to the Company the amount of any such tax or duty or has established, to the
satisfaction of the Company, that such tax or duty has been paid.

         (i) If shares of Common Stock to be delivered upon repurchase of a
Security are to be registered in a name other than that of the beneficial owner
of such Security, then such Holder must deliver to the Trustee a Surrender
Certificate, dated the date of surrender of such Restricted Security and signed
by such beneficial owner, as to compliance with the restrictions on transfer
applicable to such Restricted Security. Neither the Trustee nor any Registrar
or Transfer Agent or other agents shall be required to register in a name other
than that of the beneficial owner shares of Common Stock issued upon repurchase
of any such Restricted Security not so accompanied by a properly completed
Surrender Certificate.

         (j) All Securities delivered for repurchase shall be delivered to the
Trustee to be canceled at the direction of the Trustee, which shall dispose of
the same as provided in Section 3.9.

SECTION 14.4. Certain Definitions.

         For purposes of this Article Fourteen,

         (a) the term "beneficial owner" shall be determined in accordance with
Rule 13d-3, as in effect on the date of the original execution of this
Indenture, promulgated by the Commission pursuant to the Exchange Act;





                                    -110-

<PAGE>   121



         (b) a "Change in Control" shall be deemed to have occurred at the
time, after the original issuance of the Securities, of:

         (i)   the acquisition by any person of beneficial ownership, directly
               or indirectly, through a purchase, merger or other acquisition
               transaction or series of transactions, of shares of capital
               stock of the Company entitling such person to exercise 50% or
               more of the total voting power of all shares of capital stock of
               the Company entitled to vote generally in the elections of
               directors (any shares of voting stock of which such person or
               group is the beneficial owner that are not then outstanding
               being deemed outstanding for purposes of calculating such
               percentage), other than any such acquisition by the Company, any
               Subsidiary of the Company or any employee benefit plan of the
               Company existing on the date of this Indenture; or

         (ii)  any consolidation or merger of the Company with or into, any 
               other person, any merger of another person with or into the
               Company, or any conveyance, sale, transfer or lease of all or
               substantially all of the assets of the Company to another person
               (other than (a) any such transaction (x) which does not result
               in any reclassification, conversion, exchange or cancellation of
               outstanding shares of Common Stock or (y) pursuant to which
               holders of Common Stock immediately prior to such transaction
               have the entitlement to exercise, directly or indirectly, 50% or
               more of the total voting power of all shares of capital stock
               entitled to vote generally in the election of directors of the
               continuing or surviving person immediately after such
               transaction and (b) any merger which is effected solely to
               change the jurisdiction of incorporation of the Company and
               results in a reclassification, conversion or exchange of
               outstanding shares of Common Stock into solely shares of common
               stock);

provided, however, that a Change in Control shall not be deemed to have
occurred if either (x) the Closing Price Per Share of the Common Stock on any
five Trading Days within the period of 10 consecutive Trading Days ending
immediately after the later of the date of the Change in Control or the date of
the public announcement of the Change in Control (in the case of a Change in
Control under Clause (i) above) or the period of 10 consecutive Trading Days
ending immediately prior to the date of the Change in Control (in the case of a
Change in Control under Clause (ii) above) shall equal or exceed 105% of the
Conversion Price of the Securities in effect on each such Trading Day or (y)
all the consideration (excluding cash payments for fractional shares) to be
paid for the Common Stock in the transaction or transactions constituting the
change in Control consists of shares of common stock traded on a national
securities exchange or quoted on the Nasdaq National Market and as a result of
such transaction or transactions the Securities become convertible solely into
such common stock; and





                                    -111-

<PAGE>   122



         (c) for purposes of Section 14.4(b)(i), the term "person" shall
include any syndicate or group which would be deemed to be a "person" under
Section 13(d)(3) of the Exchange Act, as in effect on the date of the original
execution of this Indenture.




                                    -112-

<PAGE>   123



                                ARTICLE FIFTEEN

         HOLDERS LISTS AND REPORTS BY TRUSTEE AND COMPANY; NON-RECOURSE

SECTION 15.1. Company to Furnish Trustee Names and Addresses of Holders.

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

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

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

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

SECTION 15.2. Preservation of Information.

         (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders contained in the most recent
list furnished to the Trustee as provided in Section 15.1 and the names and
addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 15.1 upon receipt of a new list so furnished.

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

         (c) Every Holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the
Trustee nor any agent of either of them shall be held accountable by reason of
any disclosure of information as to names and addresses of Holders made
pursuant to the Trust Indenture Act.

SECTION 15.3. No Recourse Against Others.

         An incorporator or any past, present or future director, officer,
employee or stockholder, as such, of the Company shall not have any liability
for any obligations of the Company under the Securities or this Indenture or
for any claim based on, in respect of or by reason of such obligations or their
creation. By accepting a Security, each Holder shall waive and




                                    -113-

<PAGE>   124



release all such liability. Such waiver and release shall be part of the
consideration for the issue of the Securities.

SECTION 15.4. Reports by Trustee.

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

         (b) After this Indenture has been qualified under the Trust Indenture
Act, a copy of each such report shall, at the time of such transmission to
Holders, be filed by the Trustee with each stock exchange upon which the
Securities are listed, with the Commission and with the Company. The Company
will notify the Trustee when the Securities are listed on any stock exchange.

SECTION 15.5. Reports by Company.

         After this Indenture has been qualified under the Trust Indenture Act,
the Company shall file with the Trustee and the Commission, and transmit to
Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times
and in the manner provided pursuant to such Act; provided that any such
information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 shall be
filed with the Trustee within 15 days after the same is so required to be filed
with the Commission.

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

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






                                    -114-

<PAGE>   125



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

                                        DSC COMMUNICATIONS CORPORATION


                                        By     /s/ Gerald F. Montry
                                          -------------------------------------
                                          Name:    Gerald F. Montry
                                          Title:   Senior Vice President and
                                                   Chief Financial Officer
Attest:


     /s/ Paul A. Wensel
- -------------------------------------
Name:   Paul A. Wensel
Title:  Assistant General Counsel


                                        THE BANK OF NEW YORK, Trustee


                                        By      /s/ Mary Jane Morrissey
                                          -------------------------------------
                                          Name:    Mary Jane Morrissey
                                          Title:   Vice President







<PAGE>   126



STATE OF                        )
                                ) : ss.:
COUNTY OF                       )


         On the 12th day of August, 1997, before me personally came Gerald F.
Montry, to me known, who, being by me duly sworn, did depose and say that he is
the Senior Vice President and Chief Financial Officer of DSC Communications
Corporation, one of the corporations described in and which executed the
foregoing instrument; that he knows the seal of said corporation; that the seal
affixed to said instrument is such corporate seal; that it was so affixed by
authority of the Board of Directors of said corporation; and that he signed his
name thereto by like authority.

                                                    /s/ Ruthie I. Horner
                                          -------------------------------------
                                                       Notary Public



<PAGE>   127



                                                             ANNEX A -- Form of
                                                       Regulation S Certificate




                            REGULATION S CERTIFICATE

            (For transfers pursuant to ss. 3.5(b)(i), (iii) and (v)
                               of the Indenture)


The Bank of New York
  as Trustee
101 Barclay St., Floor 21 West
New York, New York 10286
Attention:  Corporate Trust Administration

         Re: 7% Convertible Subordinated Notes due
             August 1, 2004 of DSC Communications Corporation (the "Securities"

         Reference is made to the Indenture, dated as of August 12, 1997 (the
"Indenture"), from DSC Communications Corporation (the "Company") to The Bank
of New York, as Trustee. Terms used herein and defined in the Indenture or in
Regulation S or Rule 144 under the U.S. Securities Act of 1933 (the "Securities
Act") are used herein as so defined.

         This certificate relates to U.S. $____________ principal amount of
Securities, which are evidenced by the following certificate(s) (the "Specified
Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so.
Such beneficial owner or owners are referred to herein collectively as the
"Owner". If the Specified Securities are represented by a Global Security, they
are held through the Depositary or an Agent Member in the name of the
Undersigned, as or on behalf of the Owner. If the Specified Securities are not
represented by a Global Security, they are registered in the name of the
Undersigned, as or on behalf of the Owner.

         The Owner has requested that the Specified Securities be transferred
to a person (the "Transferee") who will take delivery in the form of a
Regulation S Security. In connection with such transfer, the Owner hereby
certifies that, unless such transfer is being effected pursuant to an effective
registration statement under the Securities Act, it is being effected in
accordance with Rule 904 or Rule 144 under the Securities Act and with all
applicable securities laws of the




                                     A-1

<PAGE>   128



states of the United States and other jurisdictions. Accordingly, the Owner
hereby further certifies as follows:

         (1) Rule 904 Transfers. If the transfer is being effected in
     accordance with Rule 904:

               (A) the Owner is not a distributor of the Securities, an
         affiliate of the Company or any such distributor or a person acting on
         behalf of any of the foregoing;

               (B) the offer of the Specified Securities was not made to a
         person in the United States;

               (C) either:

                  (i) at the time the buy order was originated, the Transferee
               was outside the United States or the Owner and any person acting
               on its behalf reasonably believed that the Transferee was
               outside the United States, or

                  (ii) the transaction is being executed in, on or through the
               facilities of the Eurobond market, as regulated by the
               Association of International Bond Dealers, or another designated
               offshore securities market and neither the Owner nor any person
               acting on its behalf knows that the transaction has been
               prearranged with a buyer in the United States;

               (D) no directed selling efforts have been made in the United
         States by or on behalf of the Owner or any affiliate thereof;

               (E) if the Owner is a dealer in securities or has received a
         selling concession, fee or other remuneration in respect of the
         Specified Securities, and the transfer is to occur during the
         Restricted Period, then the requirements of Rule 904(c)(1) have been
         satisfied; and

               (F) the transaction is not part of a plan or scheme to evade the
         registration requirements of the Securities Act.

         (2) Rule 144 Transfers. If the transfer is being effected pursuant to
     Rule 144:

               (A) the transfer is occurring after a holding period of at least
         two years (computed in accordance with paragraph (d) of Rule 144) has
         elapsed since the date the Specified Securities were acquired from the
         Company or from an affiliate (as such term is defined in Rule 144) of
         the Company, whichever is later, and is being




                                     A-2

<PAGE>   129



         effected in accordance with the applicable amount, manner of sale and
         notice requirements of paragraphs (e), (f) and (h) of Rule 144; or

               (B) the transfer is occurring after a period of at least three
         years has elapsed since the date the Specified Securities were
         acquired from the Company or from an affiliate (as such term is
         defined in Rule 144) of the Company, whichever is later, and the Owner
         is not, and during the preceding three months has not been, an
         affiliate of the Company.

         This certificate and the statements contained herein are made for your
benefit and the benefit of the Company and the Initial Purchaser.


Dated:
                              -------------------------------------------------
                              (Print the name of the Undersigned, as such term
                              is defined in the second paragraph of this
                              certificate.)


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

                              (If the Undersigned is a corporation, partnership
                              or fiduciary, the title of the person signing on
                              behalf of the Undersigned must be stated.)



                              -------------------------------------------------
                              Signature Guaranteed

Signatures must be guaranteed by an "eligible guarantor institution" meeting
the requirements of the [Registrar], which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or
such other "signature guarantee program" as may be determined by the
[Registrar] in addition to, or in substitution for, STAMP, all in accordance
with the Securities Exchange Act of 1934, as amended.




                                     A-3

<PAGE>   130



                                                  ANNEX B -- Form of Restricted
                                                         Securities Certificate




                       RESTRICTED SECURITIES CERTIFICATE

         (For transfers pursuant to ss. 3.5(b)(ii), (iii), (iv) and (v)
                               of the Indenture)



The Bank of New York
  as Trustee
101 Barclay St., Floor 21 West
New York, New York 10286
Attention:  Corporate Trust Administration

         Re:7% Convertible Subordinated Notes due
            August 1, 2004 of DSC Communications Corporation (the "Securities")

         Reference is made to the Indenture, dated as of August 12, 1997 (the
"Indenture"), from DSC Communications Corporation (the "Company") to The Bank
of New York, as Trustee. Terms used herein and defined in the Indenture or in
Regulation S or Rule 144 under the U.S. Securities Act of 1933 (the "Securities
Act") are used herein as so defined.

         This certificate relates to U.S. $_____________ principal amount of
Securities, which are evidenced by the following certificate(s) (the "Specified
Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so.
Such beneficial owner or owners are referred to herein collectively as the
"Owner". If the Specified Securities are represented by a Global Security, they
are held through the Depositary or an Agent Member in the name of the
Undersigned, as or on behalf of the Owner. If the Specified Securities are not
represented by a Global Security, they are registered in the name of the
Undersigned, as or on behalf of the Owner.

         The Owner has requested that the Specified Securities be transferred
to a person (the "Transferee") who will take delivery in the form of a
Restricted Security. In connection with such transfer, the Owner hereby
certifies that, unless such transfer is being effected pursuant to an effective
registration statement under the Securities Act, it is being effected in
accordance with





                                     B-1

<PAGE>   131



Rule 144A or Rule 144 under the Securities Act and all applicable securities
laws of the states of the United States and other jurisdictions. Accordingly,
the Owner hereby further certifies as:

         (1) Rule 144A Transfers. If the transfer is being effected in
     accordance with Rule 144A:

             (A) the Specified Securities are being transferred to a person
         that the Owner and any person acting on its behalf reasonably believe
         is a "qualified institutional buyer" within the meaning of Rule 144A,
         acquiring for its own account or for the account of a qualified
         institutional buyer; and

             (B) the Owner and any person acting on its behalf have taken
         reasonable steps to ensure that the Transferee is aware that the Owner
         may be relying on Rule 144A in connection with the transfer; and

         (2) Rule 144 Transfers.  If the transfer is being effected pursuant
     to Rule 144:

             (A) the transfer is occurring after a holding period of at least
         two years (computed in accordance with paragraph (d) of Rule 144) has
         elapsed since the date the Specified Securities were acquired from the
         Company or from an affiliate (as such term is defined in Rule 144) of
         the Company, whichever is later, and is being effected in accordance
         with the applicable amount, manner of sale and notice requirements of
         paragraphs (e), (f) and (h) of Rule 144; or

             (B) the transfer is occurring after a period of at least two years
         has elapsed since the date the Specified Securities were acquired from
         the Company or from an affiliate (as such term is defined in Rule 144)
         of the Company, whichever is later, and the Owner is not, and during
         the preceding three months has not been, an affiliate of the Company.





                                     B-2

<PAGE>   132



         This certificate and the statements contained herein are made for your
benefit and the benefit of the Company and the Initial Purchaser.


Dated:
                              -------------------------------------------------
                              (Print the name of the Undersigned, as such term
                              is defined in the second paragraph of this
                              certificate.)


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

                              (If the Undersigned is a corporation, partnership
                              or fiduciary, the title of the person signing on
                              behalf of the Undersigned must be stated.)



                              -------------------------------------------------
                              Signature Guaranteed

Signatures must be guaranteed by an "eligible guarantor institution" meeting
the requirements of the [Registrar], which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or
such other "signature guarantee program" as may be determined by the
[Registrar] in addition to, or in substitution for, STAMP, all in accordance
with the Securities Exchange Act of 1934, as amended.





                                     B-3

<PAGE>   133



                                                ANNEX C -- Form of Unrestricted
                                                         Securities Certificate




                      UNRESTRICTED SECURITIES CERTIFICATE

         (For removal of Securities Act Legends pursuant to ss. 3.5(c))



The Bank of New York
  as Trustee
101 Barclay St., Floor 21 West
New York, New York 10286
Attention:  Corporate Trust Administration

        Re: 7% Convertible Subordinated Notes due
            August 1, 2004 of DSC Communications Corporation (the "Securities")

         Reference is made to the Indenture, dated as of August 12, 1997 (the
"Indenture"), from DSC Communications Corporation (the "Company") to The Bank
of New York, as Trustee. Terms used herein and defined in the Indenture or in
Regulation S or Rule 144 under the U.S. Securities Act of 1933 (the "Securities
Act") are used herein as so defined.

         This certificate relates to U.S. $_____________ principal amount of
Securities, which are evidenced by the following certificate(s) (the "Specified
Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the "Undersigned")
hereby certifies that either (i) it is the sole beneficial owner of the
Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so.
Such beneficial owner or owners are referred to herein collectively as the
"Owner". If the Specified Securities are represented by a Global Security, they
are held through the Depositary or an Agent Member in the name of the
Undersigned, as or on behalf of the Owner. If the Specified Securities are not
represented by a Global Security, they are registered in the name of the
Undersigned, as or on behalf of the Owner.

         The Owner has requested that the Specified Securities be exchanged for
Securities bearing no Securities Act Legend pursuant to Section 3.5(c) of the
Indenture. In connection with such exchange, the Owner hereby certifies that
the exchange is occurring after a period of at least two years has elapsed
since the date the Specified Securities were acquired from the Company or from
an affiliate (as such term is defined in Rule 144) of the Company, whichever is
later, and the




                                     C-1

<PAGE>   134



Owner is not, and during the preceding three months has not been, an affiliate
of the Company. The Owner also acknowledges that any future transfers of the
Specified Securities must comply with all applicable securities laws of the
states of the United States and other jurisdictions.

                  This certificate and the statements contained herein are made
for your benefit and the benefit of the Company and the Initial Purchaser.



Dated:
                              -------------------------------------------------
                              (Print the name of the Undersigned, as such term
                              is defined in the second paragraph of this
                              certificate.)


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

                              (If the Undersigned is a corporation, partnership
                              or fiduciary, the title of the person signing on
                              behalf of the Undersigned must be stated.)



                              -------------------------------------------------
                              Signature Guaranteed

Signatures must be guaranteed by an "eligible guarantor institution" meeting
the requirements of the [Registrar], which requirements include membership or
participation in the Security Transfer Agent Medallion Program ("STAMP") or
such other "signature guarantee program" as may be determined by the
[Registrar] in addition to, or in substitution for, STAMP, all in accordance
with the Securities Exchange Act of 1934, as amended.




                                     C-2

<PAGE>   135


                                                             ANNEX D -- Form of
                                                          Surrender Certificate

         In connection with the certification contemplated by Section 12.2 or
14.3(i) relating to compliance with certain restrictions relating to transfers
of Restricted Securities, such certification shall be provided substantially in
the form of the following certificate, with only such changes thereto as shall
be approved by the Company and Goldman, Sachs & Co.:

                                  "CERTIFICATE

                         DSC COMMUNICATIONS CORPORATION

              7% CONVERTIBLE SUBORDINATED NOTES DUE AUGUST 1, 2004

         This is to certify that as of the date hereof with respect to
U.S.$________ principal amount (as defined in the Indenture) of the
above-captioned securities surrendered on the date hereof (the "Surrendered
Securities") for registration of transfer, or for conversion or repurchase
where the securities issuable upon such conversion or repurchase are to be
registered in a name other than that of the undersigned Holder (each such
transaction being a "transfer"), the undersigned Holder (as defined in the
Indenture) certifies that the transfer of Surrendered Securities associated
with such transfer complies with the restrictive legend set forth on the face
of the Surrendered Securities for the reason checked below:

     ________     The transfer of the Surrendered Securities complies with Rule
                  144 under the United States Securities Act of 1933, as
                  amended (the "Securities Act"); or

     _______      The transfer of the Surrendered Securities complies with Rule
                  144A under the Securities Act; or

     _______      The transfer of the Surrendered Securities complies with Rule
                  904 under the Securities Act.

     _______      The transfer of the Surrendered Securities has been made to
                  an institution that is an "accredited investor" within the
                  meaning of Rule 501(a)(1), (2), (3) or (7) under the
                  Securities Act in a transaction exempt from the registration
                  requirements of the Securities Act.

                                              [Name of Holder]


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

Dated:  ____________, ____*"
        *           To be dated the date
                    of surrender




                                     D-1




<PAGE>   1
                                                                     EXHIBIT 4.2

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

                             REGISTRATION RIGHTS

                                  AGREEMENT



                         Dated as of August 7, 1997


                               By and Between


                       DSC COMMUNICATIONS CORPORATION


                                     and


                          GOLDMAN, SACHS & CO. and
                      NATIONSBANC CAPITAL MARKETS, INC.

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

<PAGE>   2

                        REGISTRATION RIGHTS AGREEMENT


                 This REGISTRATION RIGHTS AGREEMENT, dated as of August 7,
1997, is made by and between DSC Communications Corporation, a Delaware
corporation (the "Company"), and Goldman, Sachs & Co. and NationsBanc Capital
Markets, Inc. (collectively referred to herein as the "Purchasers").

                                    RECITALS

                 WHEREAS, the Company and the several Purchasers have entered
into a purchase agreement, dated August 7, 1997 (the "Purchase Agreement"),
providing for, among other things, the sale by the Company and the purchase by
the Purchasers of an aggregate of U.S.$300,000,000 principal amount, and, at
the election of the Purchasers, up to an aggregate of U.S.$100,000,000
additional principal amount, of the Company's 7% Convertible Subordinated Notes
due August 1, 2004, convertible into shares of Common Stock (as defined herein)
of the Company as provided in the Indenture (as defined herein); and

                 WHEREAS, this Agreement is being entered into pursuant to the
Purchase Agreement as a condition to the closing of the sale of the Securities
(as defined herein) pursuant thereto;

                 NOW, THEREFORE, in consideration of the premises, and of the
mutual covenants, representations, warranties and agreements herein contained,
the parties hereto agree as follows:


1.       Certain Definitions.

                 As used in this Agreement, the following terms shall have the
following respective meanings:

                 (a)      "Closing Date" shall mean the First Time of Delivery
as defined in the Purchase Agreement.

                 (b)      "Commission" shall mean the Securities and Exchange
Commission, or any other federal agency at the time administering the Exchange
Act or the Securities Act, whichever is the relevant statute for the particular
purpose.

                 (c)      "Common Stock" means the common stock, par value $.01
per share, of the Company, together with the related Preferred Share Purchase
Rights of

<PAGE>   3

the Company issuable with such shares and any securities of the Company or any
successor which may be issuable upon conversion of the Securities pursuant to
Article Twelve of the Indenture.

                 (d)      "Effective Time" shall mean the date on which the
Commission declares the Registration Statement effective or on which the
Registration Statement otherwise becomes effective.

                 (e)      "Electing Holder" shall have the meaning assigned
thereto in Section 3(c) of this Agreement; provided, however, that, if the
record holder of any Registrable Securities is The Depository Trust Company (or
a successor thereto) or its nominee, the holder of such securities shall mean
the person that would be considered the holder thereof for purposes of Item 507
of Regulation S-K under the Securities Act.

                 (f)      "Exchange Act" shall mean the Securities Exchange Act
of 1934, or any successor thereto, as the same shall be amended from time to
time.

                 (g)      "Holder's Counsel" shall mean a single counsel (if
any) designated by the holders of not less than 25% of the aggregate principal
amount of the Registrable Securities to represent them in connection with the
Registration Statement; provided, however, that, if more than one counsel is so
designated, the Holders' Counsel shall be the designee of the holders that are
holding the greater percentage of the Registrable Securities.

                 (h)      The term "holder" shall mean, when used with respect
to any Security, the Holder (as defined in the Indenture) and, with respect to
any Common Stock, the record holder of such Common Stock.

                 (i)      "Indenture" shall mean the Indenture, dated as of
August   , 1997, between the Company and The Bank of New York, as Trustee, as
amended and supplemented from time to time in accordance with its terms.

                 (j)      "Initial Questionnaire Deadline" shall have the
meaning specified in Section 3(c).

                 (k)      The term "managing underwriter or managing
underwriters" shall mean the person or persons selected pursuant to Section
7(b) of this Agreement to manage an underwritten offering of Registrable
Securities.

                 (l)      The term "person" shall have the meaning specified 
in the Indenture.





                                     -2-
<PAGE>   4
                 (m)      "Prospectus" shall mean the prospectus (including any
preliminary prospectus and any final prospectus) included in any Registration
Statement, as amended or supplemented by any prospectus supplement with respect
to the terms of the offering of any portion of the Registrable Securities
covered by the Registration Statement and by all other amendments and
supplements to such prospectus, including all material incorporated by
reference in such prospectus and all documents filed after the date of such
prospectus by the Company under the Exchange Act and incorporated by reference
therein.

                 (n)      "Registrable Securities" shall mean all or any
portion of the Securities issued under the Indenture and the shares of Common
Stock issuable upon conversion of such Securities; provided, however, that a
security ceases to be a Registrable Security when it is no longer a Restricted
Security.

                 (o)      "Registration Expenses" shall have the meaning
assigned thereto in Section 4(c) of this Agreement.

                 (p)      "Registration Statement" shall mean a "shelf"
registration statement filed under the Securities Act providing for the
registration of, and the sale on a continuous or delayed basis by the holders
of, all of the Registrable Securities (subject to Section 3(c) hereof) pursuant
to Rule 415 under the Securities Act and/or any similar rule that may be
adopted by the Commission, filed by the Company pursuant to the provisions of
Section 2 of this Agreement, including the Prospectus contained therein, any
amendments and supplements to such registration statement, including
post-effective amendments, and all exhibits and all materials incorporated by
reference in such registration statement.

                 (q)      "Restricted Security" shall mean any Security or
share of Common Stock issuable upon conversion thereof unless or until (i) such
Security or the Common Stock issuable upon conversion thereof has been
effectively registered under the Securities Act and sold in a manner
contemplated by the Registration Statement or (ii) such Security or the Common
Stock issuable upon conversion thereof has been transferred in compliance with
Rule 144 under the Securities Act (or any successor provision thereto).

                 (r)      "Rules and Regulations" shall mean the published
rules and regulations of the Commission promulgated under the Securities Act or
the Exchange Act, as in effect at any relevant time.

                 (s)      "Securities" shall mean the Company's 7% Convertible
Subordinated Notes due August 1, 2004, to be issued pursuant to the Indenture
and sold pursuant to the Purchase Agreement and the Common Stock issuable upon
conversion thereof.





                                     -3-
<PAGE>   5
                 (t)      "Securities Act" shall mean the Securities Act of
1933, or any successor thereto, as the same shall be amended from time to time.

                 (u)      "Selling Securityholder's Questionnaire" shall have
the meaning assigned thereto in Section 3(c) of this Agreement.

                 (v)      "Specified Registrable Securities" shall have the
meaning assigned thereto in Section 3(c) of this Agreement.

                 (w)      "Trust Indenture Act" shall mean the Trust Indenture
Act of 1939, or any successor thereto, and the rules, regulations and forms
promulgated thereunder, all as the same shall be amended from time to time.

                 (x)      The term "underwriter" shall mean any underwriter of
an underwritten offering of Registrable Securities pursuant to Section 7(b) of
this Agreement.

                 (y)      Wherever there is a reference in this Agreement to a
percentage of the "principal amount" of the Registrable Securities or to a
percentage of Registrable Securities, Common Stock shall be treated as
representing the principal amount of Securities which was surrendered for
conversion in order to receive such number of shares of Common Stock.

                 The filing of a document or report under the Exchange Act that
is incorporated by reference into the Registration Statement shall not be
deemed to be an amendment or supplement of the Registration Statement or the
filing of a Registration Statement or Prospectus (notwithstanding any
undertaking in the Registration Statement that may provide to the contrary) for
purposes of any provision of this Agreement that may give any person (i) a
right to review, or receive a copy, of any Registration Statement, Prospectus
or amendment or supplement thereto prior to the filing thereof, (ii) the right
to conduct any "due diligence" investigation that is triggered by the filing of
any Registration Statement, Prospectus or amendment or supplement or (iii) the
right to receive any notice that is triggered by any such filing.





                                     -4-
<PAGE>   6
                 2.       Registration Under the Securities Act.

                 (a)      The Company shall, at its expense (subject to Section
4 hereof), within 90 calendar days following the Closing Date, file with the
Commission a Registration Statement with respect to the Registrable Securities
and thereafter shall use its reasonable best efforts to cause such Registration
Statement to be declared effective by the Commission under the Securities Act
within 90 calendar days after the date of the filing of such Registration
Statement.

                 (b)      Subject to Section 2(e) hereof, the Company shall use
its reasonable best efforts to keep the Registration Statement continuously
effective under the Securities Act and usable by holders for resales of
Registrable Securities for a period of two years from the Effective Time or
such shorter period that will terminate upon the earlier of the following:  (i)
when there are no outstanding Registrable Securities and (ii) when, in the
written opinion of independent counsel to the Company, all outstanding
Registrable Securities held by persons that are not "affiliates" of the Company
(as defined in Rule 144(a)(1) under the Securities Act) may be resold without
registration under the Securities Act pursuant to Rule 144(k) under the
Securities Act (or any successor provision thereto) and the Company has removed
all legends from the Registrable Securities restricting the transfer thereof
(other than any Registrable Security held by an affiliate). The Company shall
use its reasonable best efforts to file such amendments or supplements to the
Registration Statement as are necessary or appropriate to discharge its
obligations under the preceding sentence.

                 (c)      If at any time, the Securities, pursuant to Article
Twelve of Indenture, are convertible into securities other than the Company's
common stock, par value $.01 per share, together with the related Preferred
Share Purchase Rights of the Company issuable with such shares, the Company
shall, or shall cause any successor under the Indenture to, cause such
securities to be included in the Registration Statement no later than the date
on which the Securities may then be convertible into such securities.

                 (d)      The parties hereto agree that, notwithstanding the
provisions of Section 9(b), the remedies provided for in Section 10.12 of the
Indenture shall constitute the sole and exclusive remedy for any breach by the
Company of its obligations under Section 2(a) hereof.

                 (e)      Notwithstanding anything to the contrary contained
herein (including, without limitation, Section 2(b) hereof), the fact that any
action or inaction on the part of the Company relating to the conduct of its
business or the occurrence of any other event causes the Registration Statement
not to be usable pursuant to Section 3(f) hereof or not to be effective shall
not constitute a breach of this Agreement by the Company, provided that the
foregoing shall not limit (a) the Company's obligation to





                                     -5-
<PAGE>   7
reasonably promptly thereafter take the actions required by Sections 3(d)(v)
and/or 3(d)(xii) hereof, (b) any obligation that the Company may have to pay
additional interest pursuant to Section 10.12 of the Indenture or (c) the
Company's obligations under Section 3(d)(xv) hereof.


                 3.       Registration Procedures.

                 (a)      Prior to or at the Effective Time the Company shall
qualify the Indenture under the Trust Indenture Act.

                 (b)      In the event that compliance with Section 3(a) hereof
involves the appointment of a new trustee under the Indenture, the Company
shall appoint a new trustee thereunder pursuant to the applicable provisions of
the Indenture.

                 (c)      The Company shall include in the Registration
Statement as of the Effective Time all Registrable Securities which any holder
shall have elected (each, an "Electing Holder") to include in the Registration
Statement as specified in a completed questionnaire substantially in the form
attached hereto as Exhibit A (a "Selling Securityholder's Questionnaire"),
received by the Company on or prior to the date 85 calendar days after the
Closing Date (the "Initial Questionnaire Deadline"). No earlier than 45 days
after the Closing Date and no later than 60 days after the Closing Date the
Company, at its expense, shall mail to each Holder a Selling Securityholder
Questionnaire. As used herein, the term "Specified Registrable Securities"
shall mean all Registrable Securities that the Electing Holders have elected to
include in the Registration Statement as provided in the preceding sentence on
or prior to the Initial Questionnaire Deadline. Each person acquiring Specified
Registrable Securities from an Electing Holder after the date on which such
Electing Holder provided the Company its Selling Securityholder's Questionnaire
shall also be entitled to have such Specified Registrable Securities included
in the Registration Statement so long as such person provides the Company with
an updated Selling Securityholder's Questionnaire.  Any such transferee shall
be entitled to have its Specified Registrable Securities included in the
Registration Statement (i) at the Effective Time, if the updated Selling
Securityholder's Questionnaire is received by the Company on or prior to the
date 10 calendar days prior to the Effective Time and (ii) in all other cases,
reasonably promptly after the Company receives the updated Selling
Securityholder's Questionnaire.  In the case of any Specified Registrable
Securities which are not included in the Registration Statement at the
Effective Time and as to which an updated Selling Securityholder's
Questionnaire has been furnished to the Company, the Company shall include such
Registrable Securities in the Registration Statement reasonably promptly and in
connection therewith shall file such post-effective amendments to the
Registration





                                     -6-
<PAGE>   8
Statement or supplements to the Prospectus as may be required by the Rules and
Regulations to permit the resale of such Specified Registrable Securities.

                 (d)      In connection with the Company's obligations with
respect to the Registration Statement, the Company shall use its reasonable
best efforts to effect or cause the Registration Statement to permit the sale
of the Registrable Securities by the holders thereof in accordance with the
intended method or methods of distribution thereof described in the
Registration Statement; provided, however, that such method or methods of
distribution may take the form of an underwritten offering of the Registrable
Securities only as provided in Section 7 hereof. In connection therewith, the
Company shall:

                 (i)      for a reasonable period prior to the filing of a
         Registration Statement or Prospectus or any amendments or supplements
         thereto, furnish to the Holders' counsel, if any, and the managing
         underwriter or underwriters, if any, of Registrable Securities being
         sold in an underwritten offering copies of all such documents proposed
         to be filed, which documents will be subject to the review of such
         counsel and managing underwriter or underwriters, and the Company will
         not file any Registration Statement or amendment thereto or any
         Prospectus or any supplement thereto to which such counsel or the
         managing underwriter or underwriters, if any, shall reasonably object;
         provided, that the Company may assume, for the purposes of this
         subparagraph (i), that objections to the inclusion of information
         specifically requested to be included in the Registration Statement or
         other documents by the staff of the Commission, or in the opinion of
         counsel to the Company required to be in the Registration Statement or
         other documents, or specifically required by the Securities Act or the
         Rules and Regulations, shall not be deemed to be reasonable;

                 (ii)     for a reasonable period prior to the filing of the
         Registration Statement and prior to the execution of any underwriting
         or similar agreement, make available for inspection by Holders'
         Counsel, any managing underwriter or underwriters of Registrable
         Securities being sold in an underwritten offering, and not more than
         one accountant or firm of accountants retained by the selling holders
         or such managing underwriter, all such financial and other records,
         pertinent corporate documents and properties of the Company as would
         customarily be necessary or advisable for the purposes of a "due
         diligence" investigation of the Company's affairs; cause the Company's
         officers, directors, employees and agents, including independent
         public accountants and counsel, to supply all information reasonably
         requested by any such Holder's Counsel, underwriter or accountant in
         connection with such Registration Statement, provided that any
         records, information or documents that are designated by the Company
         in writing as confidential shall be kept confidential by such persons





                                     -7-
<PAGE>   9
         unless disclosure of such records, information or documents is
         required by court or administrative order; and furnish to Holders'
         Counsel and each managing underwriter, if any, copies of all documents
         filed with Commission and incorporated by reference in the
         Registration Statement;

                 (iii)    prepare and file with the Commission such amendments
         and post-effective amendments to the Registration Statement, and such
         supplements to the Prospectus, as may be required by the Rules and
         Regulations or the instructions applicable to the registration form
         utilized by the Company or by the Securities Act or otherwise
         necessary to keep the Registration Statement effective for the period
         specified in Section 2(b) and cause the Prospectus as so supplemented
         to be filed pursuant to Rule 424 under the Securities Act; and comply
         with the provisions of the Securities Act with respect to the
         disposition of all Registrable Securities covered by such Registration
         Statement during the period specified in Section 2(b) in accordance
         with the intended methods of disposition by the sellers thereof set
         forth in such Registration Statement or supplement to the Prospectus;

                 (iv)     notify the selling holders of Registrable Securities,
         Holders' Counsel, if any, and the managing underwriter or
         underwriters, if any, promptly, and confirm such advice in writing,

                                  (A)      when the Registration Statement, any
                 pre-effective amendment thereto, the Prospectus or any
                 prospectus supplement or post-effective amendment to the
                 Registration Statement has been filed, and, with respect to
                 the Registration Statement or any post-effective amendment,
                 when the same has become effective,

                                  (B)      with respect to Holders' Counsel
                 only, of any comments by the Commission or the "Blue Sky" or
                 securities commissioner or regulator of any state with respect
                 to the Registration Statement, the Prospectus or any
                 prospectus supplement or any request by the Commission or any
                 such securities commissioner or regulator for amendments or
                 supplements to the Registration Statement, the Prospectus or
                 any prospectus supplement or for additional information,

                                  (C)      of the issuance by the Commission of
                 any stop order suspending the effectiveness of the
                 Registration Statement or the initiation or threatening of any
                 proceedings for that purpose,





                                     -8-
<PAGE>   10
                                  (D)      if at any time the representations
                 and warranties of the Company contemplated by subparagraph
                 (xiv) below or Section 5 hereof cease to be true and correct,

                                  (E)      of the receipt by the Company of any
                 notification with respect to the suspension of the
                 qualification of the Registrable Securities for sale under the
                 securities or "Blue Sky" laws of any jurisdiction or the
                 initiation or threatening of any proceeding for such purpose,
                 and

                                  (F)      if the Company obtains knowledge, of
                 the happening of any event or the existence of any fact that
                 would require the making of any changes in or amendments or
                 supplements to the Registration Statement, any post-effective
                 amendment thereto, the Prospectus, any prospectus supplement
                 or any document incorporated therein by reference so that, as
                 of such date, the Registration Statement and the Prospectus do
                 not contain any untrue statement of a material fact and do not
                 omit to state a material fact required to be stated therein or
                 necessary to make the statements therein (in the case of the
                 Prospectus, in the light of the circumstances under which they
                 were made) not misleading;

                 (v)      use its reasonable best efforts to obtain the
         withdrawal of any order suspending the effectiveness of the
         Registration Statement as expeditiously as reasonably possible;

                 (vi)     subject to section 7(d) hereof, if requested by any
         managing underwriter or underwriters or any holder of Registrable
         Securities being sold pursuant to an underwritten offering, reasonably
         promptly incorporate in a prospectus supplement or post-effective
         amendment to the Registration Statement such information as is
         required by the applicable Rules and Regulations and as the managing
         underwriter or underwriters or such holder specifies should be
         included therein and to which the Company does not reasonably object
         relating to the terms of the sale of the Registrable Securities,
         including without limitation, information with respect to the
         principal amount or number of shares of Registrable Securities being
         sold by such holder to any underwriter or underwriters, the name and
         description of such holder or underwriter, the offering price of such
         Registrable Securities and any discount, commission or other
         compensation payable in respect thereof, the purchase price being paid
         therefor by such underwriter or underwriters and with respect to any
         other terms of the underwritten offering (including whether such
         underwriting commitment is on a firm commitment or best efforts basis)
         of the Registrable Securities to be sold in such offering; and make
         all required fillings of such prospectus supplement or post-effective
         amendment reasonably promptly after





                                     -9-
<PAGE>   11
         they are notified of the matters to be incorporated in such prospectus
         supplement or post-effective amendment;

                 (vii)    furnish to each selling holder of Registrable
         Securities included within the coverage of the Registration Statement
         and each managing underwriter, if any, without charge, an executed
         copy of the Registration Statement, each amendment and supplement
         thereto (in each case including, if the holder so requests in writing,
         all exhibits thereto and documents incorporated by reference therein)
         and such number of copies thereof as such persons may reasonably
         request in order to facilitate the offering and disposition of the
         Registrable Securities;

                 (viii)   deliver to each selling holder of Registrable
         Securities included within the coverage of the Registration Statement
         and each managing underwriter, if any, without charge, as many copies
         of the Prospectus (including each preliminary prospectus) and any
         amendment or supplement thereto as such persons may reasonably request
         in order to facilitate the offering and disposition of the Registrable
         Securities and to permit any of such persons to satisfy the prospectus
         delivery requirements of the Securities Act; and the Company hereby
         consents (except during the continuance of any fact or event described
         in Section 3(d)(iv)(F)) to the use of the Prospectus or any amendment
         or supplement thereto by each of the selling holders of Registrable
         Securities and by each underwriter thereof, if any, in connection with
         the offering and sale of the Registrable Securities covered by the
         Prospectus or any amendment or supplement thereto during the period
         specified in Section 2(b);

                 (ix)     prior to any public offering of Registrable
         Securities, use reasonable best efforts to, and in the case of any
         underwritten offering of Registrable Securities pursuant to Section 7,
         cooperate with counsel to the managing underwriter or underwriters to,
         (A) register or qualify the Registrable Securities covered by the
         Registration Statement for offer and sale under the securities or
         "Blue Sky" laws of such jurisdictions as any selling holder or
         managing underwriter reasonably shall request, (B) keep such
         registrations or qualifications in effect and comply with such laws so
         as to permit the continuance of offers, sales and dealings therein in
         such jurisdictions for so long as may be necessary to enable any such
         holder or underwriter to complete its distribution of Registrable
         Securities pursuant to the Registration Statement and (C) take any and
         all other actions as may be reasonably necessary or advisable to
         enable the disposition in such jurisdictions of such Registrable
         Securities; provided, however, that the Company shall not be required
         for any such purpose to qualify as a foreign corporation in any
         jurisdiction wherein it would not otherwise be





                                    -10-
<PAGE>   12
         required to qualify but for the requirements of this Section 3(d)(ix)
         or consent to general service of process in any such jurisdiction;

                 (x)      subject to receipt of assurances customary in
         transactions of this kind, cooperate with the selling holders of
         Registrable Securities and the managing underwriter or underwriters,
         if any, to facilitate the timely preparation and delivery of
         certificates representing Registrable Securities to be sold, which
         certificates shall not bear any restrictive legends and which shall be
         in the form required by any securities exchange upon which any
         Registrable Securities are listed; and enable such Registrable
         Securities to be in such denominations and registered in such names as
         the selling holder or the managing underwriter or underwriters, if
         any, may request at least two business days prior to any delivery of
         Registrable Securities;

                 (xi)     comply with all applicable laws and the regulations
         of such other governmental agencies or authorities, federal, state or
         local which may at any time be applicable to the Company, the
         compliance with which may be necessary to enable the Company to comply
         with its obligations hereunder;

                 (xii)    upon the happening of any event or the existence of
         any fact contemplated by subparagraph (iv)(F) above, reasonably
         promptly prepare a post-effective amendment or supplement to the
         Registration Statement or the related Prospectus or any document
         incorporated therein by reference or file any other required document
         so that the Prospectus, as thereafter delivered to the purchasers of
         the Registrable Securities, will not contain an untrue statement of a
         material fact or omit to state any material fact required to be stated
         therein or necessary to make the statements therein not misleading;

                 (xiii)   use reasonable best efforts to cause the shares of
         Common Stock constituting Registrable Securities covered by the
         Registration Statement to qualify for quotation on the Nasdaq National
         Market or, if the Common Stock is not then quoted on the Nasdaq
         National Market, to list such shares on each securities exchange on
         which outstanding Common Stock of the Company is then listed, if any;

                 (xiv)    Take the following actions:

                                  (A)      in connection with the Registration
                 Statement, make such representations and warranties to the
                 holders of the Registrable Securities to be included therein
                 in form, substance and scope as are customary in connection
                 with shelf registrations of the type contemplated by this
                 Agreement (such representations and warranties to be agreed





                                    -11-
<PAGE>   13
                 upon by the Holders' Counsel and the Company, such agreement
                 not to be unreasonably withheld) and, in connection with any
                 underwritten offering pursuant to Section 7, make such
                 representations and warranties to the holders of the
                 Registrable Securities to be sold therein and the underwriter
                 or underwriters, if any, in form, substance and scope as are
                 customarily made in connection with primary underwritten
                 offerings of equity or convertible debt securities;

                                  (B)      in connection with the Registration
                 Statement, cause to be delivered to the holders of the
                 Registrable Securities to be included therein such opinions of
                 counsel in form, substance and scope (and at such times) as
                 are customary in connection with shelf registrations of the
                 type contemplated by this Agreement (such opinions to be
                 agreed upon by Holders' Counsel and the Company, such
                 agreement not to be unreasonably withheld) and, in the case of
                 an underwritten offering pursuant to Section 7, such other
                 opinions of counsel customarily covered in opinions requested
                 in primary underwritten offerings of equity and convertible
                 debt securities;

                                  (C)      cause to be delivered letters from
                 the Company's independent certified public accountants
                 addressed to each selling holder and each underwriter, if any,
                 covering the matters customarily covered in connection with
                 primary underwritten public offerings of equity or convertible
                 debt securities (such letters to be delivered at such times as
                 are customary in connection with shelf registrations of the
                 type contemplated by this Agreement (as agreed to by Holders'
                 Counsel and the Company, such agreement not to be unreasonably
                 withheld) and, in the case of an underwritten offering
                 pursuant to Section 7, at the time of the signing of the
                 underwriting or purchase agreement and at the time of any
                 closing of such underwritten offering);

                                  (D)      if a purchase agreement is entered
                 into, cause the same to set forth in full the indemnification
                 provisions and procedures of Section 6 hereof with respect to
                 all parties to be indemnified pursuant to said Section; and

                                  (E)      in the case of an underwritten
                 offering, (i) enter into customary agreements required in
                 connection therewith (including a customary purchase
                 agreement) and (ii) deliver such customary documents and
                 certificates as may be requested by any  managing underwriter
                 or underwriters, if any, to evidence the accuracy of the
                 representations contemplated by clause (A) above and
                 compliance





                                    -12-
<PAGE>   14
                 with any customary conditions contained in the purchase
                 agreement or other agreement entered into by the Company in
                 connection with such offering.

                 (xv)     otherwise use its reasonable best efforts to comply
         with all applicable Rules and Regulations, and make generally
         available to its security holders earnings statements satisfying the
         provisions of Section 11(a) of the Securities Act no later than 45
         days after the end of any 12-month period (or 90 days, if such period
         is a fiscal year) (A) commencing at the end of any fiscal quarter in
         which the Registrable Securities are sold in an underwritten offering,
         or, if not sold in such an offering, (B) commencing with the first
         month of the Company's first fiscal quarter commencing after the
         effective date of the Registration Statement, which statements shall
         cover said 12-month periods;

                 (xvi)    notify in writing each holder of Registrable
         Securities of any proposal by the Company to amend or waive any
         provision of this Agreement pursuant to Section 9(h) hereof and of any
         amendment or waiver effected pursuant thereto, each of which notices
         shall contain the text of the amendment or waiver proposed or
         effected, as the case may be; and

                 (xvii)   in the case of an underwritten offering, in the event
         that any broker-dealer registered under the Exchange Act shall be an
         "Affiliate" (as defined in Schedule E to the By-Laws of the National
         Association of Securities Dealers, Inc. ("NASD")) of the Company or
         has a "Conflict of Interest" (as defined in such Schedule) and such
         broker-dealer shall underwrite, participate as a member of an
         underwriting syndicate or selling group or "assist in the
         distribution" (within the meaning of such Schedule) of any Registrable
         Securities, whether as a holder of such Registrable Securities or as
         an underwriter, a placement or sales agent or a broker or dealer in
         respect thereof, or otherwise, assist such broker-dealer in complying
         with the requirements of such Schedule, including, without limitation,
         by (A) engaging a "qualified independent underwriter" (as defined in
         such Schedule) to participate in the preparation of the registration
         statement relating to such Registrable Securities, to exercise usual
         standards of due diligence in respect thereto and to recommend the
         public offering price of such Registrable Securities, (B) indemnifying
         such qualified independent underwriter to the extent of the
         indemnification of underwriters provided in Section 6 hereof, and (C)
         providing such information to such broker-dealer as may be required in
         order for such broker-dealer to comply with the requirements of the
         Rules of Fair Practice of the NASD.

                 (e)      The Company may require each selling holder of
Registrable Securities as to which any registration is being effected to
furnish to the Company the information regarding the distribution of such
Registrable Securities required by the





                                    -13-
<PAGE>   15
Questionnaire or otherwise reasonably requested by the Company.  Each such
holder agrees, by the acquisition of Registrable Securities, to notify the
Company as promptly as practicable of any inaccuracy or change in information
previously furnished by such holder to the Company or of the occurrence of any
event in either case as a result of which any Prospectus relating to such
registration contains or would contain an untrue statement of a material fact
regarding such holder or such holder's intended method of distribution of such
Registrable Securities or omits to state any material fact regarding such
holder or such holder's intended method of distribution of such Registrable
Securities necessary to make the statements therein, in light of the
circumstances then existing, not misleading and promptly to furnish to the
Company any additional information required to correct and update any
previously furnished information or required so that such Prospectus shall not
contain, with respect to such holder or the distribution of such Registrable
Securities, an untrue statement of a material fact or omit to state a material
fact necessary to make the statements therein, in light of the circumstances
then existing, not misleading.

                 (f)      Each holder of Registrable Securities agrees by
acquisition of such Registrable Securities that, upon receipt of any notice
from the Company of the happening of any event of the kind described in Section
3(d)(iv)(F) hereof, such holder will forthwith discontinue disposition of
Registrable Securities pursuant to the Registration Statement until such
holder's receipt of the copies of the supplemented or amended Prospectus
contemplated by Section 3(d)(xii) hereof, or until it is advised in writing by
the Company that the use of the Prospectus may be resumed, and has received
copies of any additional or supplemental filings which are incorporated by
reference in the Prospectus, and, if so directed by the Company, such holder
will deliver to the Company (at the Company's expense) all copies, other than
permanent file copies, then in such holder's possession of the Prospectus
covering such Registrable Securities at the time of receipt of such notice.  In
the event the Company shall give any such notice, the reference to "two years"
in the first sentence of Section 2(b) shall be deemed revised to include a
number of days equal to the number of days during the period from and including
the date of the giving of such notice to and including the date when each
selling holder of Registrable Securities covered by such Registration Statement
either receives the copies of the supplemented or amended prospectus
contemplated by Section 3(d)(xii) hereof or is advised in writing by the
Company that the use of the Prospectus may be resumed.


                 4.       Registration Expenses.

                 (a)      Subject to Section 4(b) hereof, the Company shall pay
all expenses (including, without limitation, Registration Expenses) in
connection with performing its obligations under Sections 2 and 3 hereof. In
addition, the Company shall pay the





                                    -14-
<PAGE>   16
reasonable fees and disbursements of the Holders' Counsel; provided however
that the Company shall not be required to pay more than $85,000 in the
aggregate in respect of such fees and disbursements.

                 (b)      In the event of an underwritten offering pursuant to
Section 7 hereof (i) the holders participating in such offering shall be
responsible for all agency fees and commissions and underwriting discounts and
commissions, (ii) the Company shall pay the expenses referred to in clause (f)
of the definition of Registration Expenses and up to $200,000 of other
Registration Expenses relating to such underwritten offering and (ii) the
holders participating in such offering shall bear all Registration Expenses
relating to such underwritten offering in excess of $200,000 and shall
reimburse (on a pro rata basis based on the principal amount of the
Registration Securities included in the underwritten offering) the Company for
any such excess expenses reasonably incurred by the Company upon request.  To
the extent that any Registration Expenses payable by the Company are incurred,
assumed or paid by any holder, the Company shall reimburse such holder upon
request.

                 (c)      As used herein, Registration Expenses means the
following expenses relating to the Registration Statement and the sale of the
Registrable Securities relating thereto: (a) all Commission and any NASD
registration and filing fees and expenses, (b) all fees and expenses in
connection with the registration or qualification of the Registrable Securities
for offering and sale under the State securities and blue sky laws referred to
in Section 3(d)(ix) hereof and, in the case of an underwritten offering,
determination of their eligibility for investment under the laws of such
jurisdictions as the managing underwriter or underwriters, if any, or the
holders of such Registrable Securities may designate, including reasonable fees
and disbursements, if any, of counsel for the underwriters in connection with
such registrations or qualifications and determination, (c) all expenses
relating to the preparation, printing, distribution and reproduction of the
Registration Statement required to be filed hereunder, each prospectus included
therein or prepared for distribution pursuant hereto, each amendment or
supplement to the foregoing, the expenses of preparing the Registrable
Securities for delivery and the expenses of printing or producing any Purchase
Agreement(s), agreement(s) among underwriters and "Blue Sky" memoranda, any
selling agreements and all other documents in connection with the offering,
sale or delivery of Registrable Securities to be disposed of, (d) messenger,
telephone and delivery expenses of the Company, (e) fees and expenses of any
Trustee under the Indenture, any Transfer Agent and Registrar with respect to
the Registrable Securities and any escrow agent or custodian, (f) internal
expenses (including, without limitation, all salaries and expenses of the
Company's officers and employees performing legal or accounting duties), (g)
fees, disbursements and expenses of counsel and independent certified public
accountants of the Company (including the expenses of any opinions or "cold
comfort" letters required by or incident





                                    -15-
<PAGE>   17
to such performance and compliance), (h) fees, disbursements and expenses of
any "qualified independent underwriter" engaged pursuant to Section 3(d)(xvii)
hereof for acting in such capacity, (i) fees, expenses and disbursements of any
other persons retained by the Company, including special experts, retained by
the Company in connection with such registration, (j) all fees and expenses
incurred in connection with the qualification of the shares of Common Stock
constituting Registrable Securities for quotation on the Nasdaq National
Market, or the listing of such shares on any securities exchange, pursuant to
Section 3(d)(xiii) (collectively, the "Registration Expenses") and (k) in the
case of an underwritten offering pursuant to Section 7 hereof, the fees,
disbursements and expenses of a single counsel retained by the holders to
represent them in connection with such offering (the selection of such counsel
by such holders to be made in the same manner as is provided in the definition
of the terms "Holders' Counsel").


                 5.       Representations and Warranties.

                 The Company represents and warrants to, and agrees with, the
Purchasers and each of the holders from time to time of Registrable Securities
that:

                 (a)      Each Registration Statement and each Prospectus
contained therein or furnished pursuant to Sections 3(d)(vii) and 3(d)(viii)
hereof and any further amendments or supplements to any such Registration
Statement or Prospectus, when it becomes effective or is filed with the
Commission, as the case may be, and, in the case of an underwritten offering of
Registrable Securities, at the time of the closing under the Purchase Agreement
relating thereto, will conform in all material respects to the requirements of
the Securities Act and will not contain an untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein not misleading; and at all times subsequent to the
Effective Time when a prospectus would be required to be delivered under the
Securities Act, other than from (i) such time as a notice has been given to
holders of Registrable Securities pursuant to Section 3(d)(iv)(F) hereof until
(ii) such time as the Company furnishes an amended or supplemented prospectus
pursuant to Section 3(d)(xii) hereof, the Registration Statement, and the
Prospectus (including any summary prospectus) contained therein or furnished
pursuant to Section 3(d)(vii) or 3(d)(viii) hereof, as then amended or
supplemented, will conform in all material respects to the requirements of the
Securities Act and will not contain an untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances then existing, not
misleading; provided, however, that this representation and warranty shall not
apply to any statements or omissions made in reliance upon and in conformity
with information set





                                    -16-
<PAGE>   18
forth in a Selling Securityholder's Questionnaire (or any other written
information) furnished to the Company by a holder of Registrable Securities.

                 (b)      Any documents incorporated by reference in any
Prospectus referred to in Section 5(a) hereof, when they become or became
effective or are or were filed with the Commission, as the case may be, will
conform or conformed in all material respects to the requirements of the
Securities Act or the Exchange Act, as applicable, and none of such documents
will contain or contained an untrue statement of a material fact or will omit
or omitted to state a material fact required to be stated therein or necessary
to make the statements therein not misleading.

                 (c)      The compliance by the Company with all of the
provisions of this Agreement and the consummation of the transactions herein
contemplated will not conflict with or result in a breach of any of the terms
or provisions of, or constitute a default under, any indenture, mortgage, deed
of trust, loan agreement or other agreement or instrument to which the Company
or any subsidiary thereof is a party or by which the Company or any subsidiary
thereof is bound or to which any of the property or assets of the Company or
any subsidiary thereof is subject, nor will such action result in any violation
of the provisions of the Certificate of Incorporation, as amended and restated,
or the By-Laws, as amended, of the Company or any statute or any order, rule or
regulation of any court or governmental agency or body having jurisdiction over
the Company or any subsidiary thereof or any of their properties; and no
consent, approval, authorization, order, registration or qualification of or
with any such court or governmental agency or body is required for the
consummation by the Company of the transactions contemplated by this Agreement,
except the registration under the Securities Act of the Registrable Securities,
the qualification of the Indenture as contemplated by Section 3(a) hereof, and
such consents, approvals, authorizations, registrations or qualifications as
may be required under State securities or "Blue Sky" laws in connection with
the offering and distribution of the Registrable Securities.

                 (d)      This Agreement has been duly authorized, executed and
delivered by the Company and constitutes a valid and legally binding obligation
of the Company enforceable in accordance with its terms, subject, as to
enforcement, to bankruptcy, insolvency, reorganization, moratorium and similar
laws of general applicability relating to or affecting creditors' rights and to
general equity principles.


                 6.       Indemnification.

                 (a)      Indemnification by the Company.  Upon the
registration of the Registrable Securities pursuant to Section 2 hereof, and in
consideration of the agreements of the Purchasers contained herein and in the
Purchase Agreement, and





                                    -17-
<PAGE>   19
as an inducement to the Purchasers to enter into such Agreements, the Company
shall, and it hereby agrees to, indemnify and hold harmless each of the holders
of Registrable Securities to be included in such registration, each
underwriter, broker, dealer or other selling agent with respect to the
Registrable Securities and each of their respective officers, directors,
employees and agents and each person who controls such holder or underwriter,
broker, dealer or other selling agent within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act (each such person being
sometimes referred to as an "Indemnified Person") against any losses, claims,
damages or liabilities, joint or several, to which such Indemnified Person may
become subject under the Securities Act or otherwise, insofar as such losses,
claims, damages or liabilities (or actions in respect thereof) arise out of or
are based upon an untrue statement or alleged untrue statement of a material
fact contained in any Registration Statement under which such Registrable
Securities were registered under the Securities Act, or any Prospectus
contained therein or furnished by the Company to any Indemnified Person, or any
amendment or supplement thereto, or arise out of or are based upon the omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, and the
Company shall, and it hereby agrees to, reimburse such Indemnified Person for
any legal or other expenses reasonably incurred by them in connection with
investigating or defending any such action or claim; provided, however, that
the Company shall not be liable to any such Indemnified Person in any such case
to the extent that any such loss, claim, damage or liability arises out of or
is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in such Registration Statement or Prospectus, or
amendment or supplement, in reliance upon and in conformity with any written
information (including without limitation, any Selling Securityholder's
Questionnaire) furnished to the Company by such Indemnified Person expressly
for use therein.

                 (b)      Indemnification by the Holders and any Agents and
Underwriters.  The Company may require, as a condition to including any
Registrable Securities in any Registration Statement filed pursuant to this
Agreement and to entering into any Purchase Agreement with respect thereto,
that the Company shall have received an undertaking reasonably satisfactory to
it from the holder of such Registrable Securities and from each underwriter
named in any such Purchase Agreement, severally and not jointly, to (i)
indemnify and hold harmless the Company, its directors, officers who sign any
Registration Statement and each person, if any, who controls the Company within
the meaning of either Section 15 of the Securities Act or Section 20 of the
Exchange Act, against any losses, claims, damages or liabilities to which the
Company or such other persons may become subject, under the Securities Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in such Registration
Statement, or any Prospectus contained therein or





                                    -18-
<PAGE>   20
furnished by the Company to any such holder or underwriter, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in reliance upon and in
conformity with written information furnished in writing to the Company by such
person expressly for use therein (including, without limitation, any Selling
Securityholder's Questionnaire), and (ii) reimburse the Company for any legal
or other expenses reasonably incurred by the Company in connection with
investigating or defending any such action or claim;

                 (c)      Notices of Claims, Etc.  Promptly after receipt by an
indemnified party under subsection (a) or (b) above of written notice of the
commencement of any action, such indemnified party shall, if a claim in respect
thereof is to be made against an indemnifying party pursuant to the
indemnification provisions of or contemplated by this Section 6, notify such
indemnifying party in writing of the commencement of such action; but the
omission so to notify the indemnifying party shall not relieve it from any
liability which it may have to any indemnified party other than under the
indemnification provisions of or contemplated by Section 6(a) or 6(b) hereof.
In case any such action shall be brought against any indemnified party and it
shall notify an indemnifying party of the commencement thereof, such
indemnifying party shall be entitled to participate therein and, to the extent
that it shall wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel satisfactory to such
indemnified party (who shall not, except with the consent of the indemnified
party, be counsel to the indemnifying party), and, after notice from the
indemnifying party to such indemnified party of its election so to assume the
defense thereof, such indemnifying party shall not be liable to such
indemnified party for any legal expenses of other counsel or any other
expenses, in each case subsequently incurred by such indemnified party, in
connection with the defense thereof other than reasonable costs of
investigation. No indemnifying party shall, without the written consent of the
indemnified party, effect the settlement or compromise of, or consent to the
entry of any judgment with respect to, any pending or threatened action or
claim in respect of which indemnification or contribution may be sought
hereunder (whether or not the indemnified party is an actual or potential party
to such action or claim) unless such settlement, compromise or judgment (i)
includes an unconditional release of the indemnified party from all liability
arising out of such action or claim and (ii) does not include a statement as
to, or an admission of, fault, culpability or a failure to act, by or on behalf
of any indemnified party. An indemnifying party will not be liable for any
settlement of any action or claim effected without its written consent (which
shall not be unreasonably withheld).





                                    -19-
<PAGE>   21
                 (d)      Contribution.  Each party hereto agrees that, if for
any reason the indemnification provisions contemplated by Section 6(a) or
Section 6(b) are unavailable to or insufficient to hold harmless an indemnified
party in respect of any losses, claims, damages or liabilities (or actions in
respect thereof) referred to therein, then each indemnifying party shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages or liabilities (or actions in respect thereof)
in such proportion as is appropriate to reflect the relative fault of the
indemnifying party and the indemnified party in connection with the statements
or omissions which resulted in such losses, claims, damages or liabilities (or
actions in respect thereof), as well as any other relevant equitable
considerations.  The relative fault of such indemnifying party and indemnified
party shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or omission or alleged
omission to state a material fact relates to information supplied by such
indemnifying party or by such indemnified party, and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission.  The parties hereto agree that it would not be just
and equitable if contribution pursuant to this Section 6(d) were determined by
pro rata allocation (even if the holders or any agents or underwriters or all
of them were treated as one entity for such purpose) or by any other method of
allocation which does not take account of the equitable considerations referred
to in this Section 6(d).  The amount paid or payable by an indemnified party as
a result of the losses, claims, damages or liabilities (or actions in respect
thereof) referred to above shall be deemed to include any legal or other fees
or expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim.  No person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation.  The holders' and any
underwriters' obligations in this Section 6(d) to contribute shall be several
in proportion to the percentage of principal amount of Registrable Securities
registered or underwritten, as the case may be, by them and not joint.

                 (e)      Notwithstanding any other provision of this Section
6, in no event will any (i) holder be required to undertake liability to any
person under this Section 6 for an aggregate amount in excess of the dollar
amount of the proceeds to be received by such holder from the sale of such
holder's Registrable Securities (after deducting any fees, discounts and
commissions applicable thereto) pursuant to such registration and (ii)
underwriter be required to undertake liability to any person pursuant to
paragraph (d) of this Section 6 for any amount in excess of the amount by which
the total price at which the Registrable Securities underwritten by it and
distributed to the public were offered to the public exceeds the amount of any
damages which such underwriter shall have otherwise been required to pay by
reason of any untrue or alleged untrue statement or omission or alleged
omission.





                                    -20-
<PAGE>   22
                 (f)      The obligations of the Company under this Section 6
shall be in addition to any liability which the Company may otherwise have to
any Indemnified Person, including any liability to the Purchasers pursuant to
Section 8 of the Purchase Agreement.  The obligation of each person that may be
required to indemnify the Company and the other persons specified in Section
6(b) shall be in addition to any liability which any such person may otherwise
have to the Company or such other indemnified persons.

                 7.       Underwritten Offerings.  (a)  The holders of
Registrable Securities covered by the Registration Statement may sell such
Registrable Securities in an underwritten offering, provided that (i) the
holders of at least 33 1/3% in aggregate principal amount of the Registrable
Securities outstanding elect to participate in such an offering and (ii) the
Company shall not be obligated to cooperate with more than one underwritten
offering during the period specified in Section 2(b).

                 (b)      If any of the Registrable Securities covered by the
Registration Statement are to be sold pursuant to an underwritten offering, the
managing underwriter or underwriters thereof shall be designated by the holders
of at least 50% in aggregate principal amount of the outstanding Registrable
Securities to be included in such offering, provided that such designated
managing underwriter or underwriters is or are reasonably acceptable to the
Company.

                 (c)      Each holder of Registrable Securities hereby agrees
with each other such holder that no such holder may participate in any
underwritten offering hereunder unless such holder (i) agrees to sell such
holder's Registrable Securities on the basis provided in any underwriting
arrangements approved by the persons entitled hereunder to approve such
arrangements and (ii) completes and executes all questionnaires, powers of
attorney, indemnities, purchase agreements and other documents reasonably
required under the terms of such underwriting arrangements.

                 (d)      Notwithstanding the foregoing or the provisions of
Section 3(d)(vi) hereof, upon receipt of a request from a holder of Registrable
Securities or the managing underwriter or underwriters appointed pursuant to
Section 7 to prepare and file an amendment or supplement to the Registration
Statement and Prospectus in connection with an underwritten offering, the
Company may delay the filing of any such amendment or supplement for up to 120
days if the Company in good faith has a valid business reason for such delay.





                                    -21-
<PAGE>   23
                 8.       Rule 144.

                 The Company covenants to the holders of Registrable Securities
that to the extent it shall be required to do so under the Exchange Act, the
Company shall timely file the reports required to be filed by it under the
Exchange Act or the Securities Act (including, but not limited to, the reports
under Sections 13 and 15(d) of the Exchange Act referred to in subparagraph
(c)(1) of Rule 144 under the Securities Act) and the Rules and Regulations, and
shall take such further action as any holder of Registrable Securities may
reasonably request, all to the extent required from time to time to enable such
holder to sell Registrable Securities without registration under the Securities
Act within the limitations of the exemption provided by Rule 144 under the
Securities Act, as such Rule may be amended from time to time, or any similar
rule or regulation hereafter adopted by the Commission.  Upon the request of
any holder of Registrable Securities, the Company shall deliver to such holder
a written statement as to whether it has complied with such requirements.


                 9.       Miscellaneous.

                 (a)      No Inconsistent Agreements.  The Company will not on
or after the date of this Agreement grant registration rights with respect to
Registrable Securities or any other securities, or enter into any agreement
with respect to its securities, which is inconsistent with the rights granted
to the holders of Registrable Securities in this Agreement or otherwise
conflicts with the provisions hereof.  The Company is not currently a party to
any agreement with respect to any of its equity or debt securities granting any
registration rights to any person which agreement is inconsistent with the
rights granted to the holders of Registrable Securities in this Agreement or
otherwise conflicts with the provisions hereof.

                 (b)      Specific Performance.  The parties hereto acknowledge
that there may be no adequate remedy at law if any party fails to perform any
of its obligations hereunder and that each party may be irreparably harmed by
any such failure, and accordingly agree that each party, in addition to any
other remedy to which it may be entitled at law or in equity, shall be entitled
to compel specific performance of the obligations of any other party under this
Agreement in accordance with the terms and conditions of this Agreement, in any
court of the United States or any State thereof having jurisdiction.

                 (c)      Notices.  All notices, requests, claims, demands,
waivers and other communications hereunder shall be given in the manner
provided for in the Indenture; provided, however, that the foregoing items
shall be deemed effectively given to a





                                    -22-
<PAGE>   24
holder for all purposes of this Agreement when delivered to the address for
notices specified in the Selling Securityholder's Questionnaire delivered by
such holder.

                 (d)      Parties in Interest.  All the terms and provisions of
this Agreement shall be binding upon, shall inure to the benefit of and shall
be enforceable by the respective successors and assigns of the parties hereto.
In the event that any transferee of any holder of Registrable Securities shall
acquire Registrable Securities, in any manner, whether by gift, bequest,
purchase, operation of law or otherwise, such transferee shall, without any
further writing or action of any kind, be deemed a party hereto for all
purposes and such Registrable Securities shall be held subject to all of the
terms of this Agreement, and by taking and holding such Registrable Securities
such transferee shall be entitled to receive the benefits of and be
conclusively deemed to have agreed to be bound by and to perform all of the
terms and provisions of this Agreement.  If the Company shall so request, any
such successor, assign or transferee shall agree in writing to acquire and hold
the Registrable Securities subject to all of the terms hereof.

                 (e)      Survival.  The respective indemnities, agreements,
representations, warranties and each other provision set forth in this
Agreement or made pursuant hereto shall remain in full force and effect
regardless of any investigation (or statement as to the results thereof) made
by or on behalf of any holder of Registrable Securities, any director, officer
or partner of such holder, any agent or underwriter or any director, officer or
partner thereof, or any controlling person of any of the foregoing, and shall
survive delivery of and payment for the Registrable Securities pursuant to the
Purchase Agreement and the transfer and registration of Registrable Securities
by such holder.

                 (f)      Governing Law.  This Agreement shall be governed by
and construed in accordance with the laws of the State of New York.

                 (g)      Headings.  The descriptive headings of the several
Sections and paragraphs of this Agreement are inserted for convenience only, do
not constitute a part of this Agreement and shall not affect in any way the
meaning or interpretation of this Agreement.

                 (h)      Amendments and Waivers.  This Agreement may be
amended and the observance of any term of this Agreement may be waived (either
generally or in a particular instance and either retroactively or
prospectively) only by a written instrument duly executed by the Company and
the holders of at least 66 2/3% of the principal amount of the Registrable
Securities at the time outstanding.  Each holder of any Registrable Securities
at the time or thereafter outstanding shall be bound by any amendment or waiver
effected pursuant to this Section 9(h), whether or not any notice,





                                    -23-
<PAGE>   25
writing or marking indicating such amendment or waiver appears on such
Registrable Securities or is delivered to such holder.

                 (i)      Inspection.  For so long as this Agreement shall be
in effect, this Agreement and a complete list of the names and addresses of all
the holders of Registrable Securities shall be made available for inspection
and copying on any business day by any holder of Registrable Securities at the
offices of the Company at the address set forth in the Indenture.

                 (j)      Counterparts.  This Agreement may be executed in two
or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.





                                      -24-
<PAGE>   26
                 IN WITNESS WHEREOF, the parties hereto have caused this
instrument to be duly executed as of the date first written above.


                                         DSC COMMUNICATIONS CORPORATION



                                         By:   /s/   Gerald F. Montry     
                                            ---------------------------------
                                             Name:   Gerald F. Montry
                                             Title:  Senior Vice President and
                                                     Chief Financial Officer


                                         GOLDMAN, SACHS & CO.
                                         NATIONSBANC CAPITAL MARKETS. INC.



                                         By:  GOLDMAN, SACHS & CO.



                                         By:    /s/ Goldman, Sachs & Co. 
                                            ---------------------------------   
                                               (Goldman, Sachs & Co.)





                                    -25-
<PAGE>   27
                                                                       Exhibit A

                                                     NAME:
                                                          ---------------------

                       DSC COMMUNICATIONS CORPORATION

                   Selling Securityholder's Questionnaire

                IN CONNECTION WITH THE PROPOSED REGISTRATION
               OF SECURITIES OF DSC COMMUNICATIONS CORPORATION

                 Reference is made to the Registration Rights Agreement (the
"Registration Rights Agreement") dated as of August 7, 1997 between DSC
Communications Corporation (the "Company") and the Purchasers named therein.
All capitalized terms not otherwise defined herein shall have the meanings
given to them in the Registration Rights Agreement.  Pursuant to the
Registration Rights Agreement, the Company agreed to file a Registration
Statement under the Securities Act of 1933, as amended (the "Securities Act"),
for the registration and sale under Rule 415 under the Securities Act of the
Company's 7% Convertible Subordinated Notes due August 1, 2004 (the "Notes")
and the shares of Common Stock of the Company issuable upon conversion of the
Notes.  The undersigned beneficial owner (the "Selling Securityholder") of
Registrable Securities hereby elects pursuant to Section 3(c) of the
Registration Rights Agreement to include in the Registration Statement the
Registrable Securities beneficially owned by it and listed in Item 4 below
(unless otherwise specified under Item 4).  The inclusion in the Registration
Statement of the Registrable Securities owned by the Selling Securityholder
shall be made in accordance with and shall be subject to the provisions of the
Registration Rights Agreement.  The Selling Securityholder is providing this
Questionnaire to provide the Company with information necessary for the
inclusion in the Registration Statement of the Registrable Securities
beneficially owned by the Selling Securityholder.




(i)      Complete Name of Selling Securityholder:




(ii)     Address for Notices:





<PAGE>   28
(iii)    Contact Person:

         Name:

         Address:

         Tel.:

         Fax.:


(iv)     Registrable Securities Beneficially Owned by the Selling
         Securityholder:

         EXCEPT AS SET FORTH BELOW, THE UNDERSIGNED SELLING SECURITYHOLDER DOES
         NOT OWN ANY NOTES OR SHARES OF COMMON STOCK HERETOFORE ISSUED UPON
         CONVERSION OF ANY NOTE.

         Principal Amount of Notes:



         Shares of Common Stock Heretofore Issued Upon Conversion of Notes:



(v)      Other Shares of Common Stock or Other Securities of the Company Owned
         by the Selling Securityholder:

         EXCEPT AS SET FORTH BELOW, AND UNDER ITEM 4, THE UNDERSIGNED SELLING
         SECURITYHOLDER DOES NOT OWN ANY SHARES OF COMMON STOCK OR ANY OTHER
         SECURITIES OF THE COMPANY.



(vi)     Except as set forth below, the Selling Securityholder has held no
         position or office or has had any other material relationship with the
         Company (or predecessor or affiliate of the Company) during the past
         three years.


(vii)    The Selling Securityholder acknowledges that it understands its
         obligation to comply with the provisions of the Securities Exchange
         Act of 1934, and the rules





                                     A-2
<PAGE>   29
         thereunder, relating to stock manipulation, particularly Rule 10b-6
         thereunder, in connection with the offering of its Registrable
         Securities covered by the Registration Statement.  The Selling
         Securityholder agrees that neither it nor any person acting on its
         behalf, will bid for, or purchase any securities of the Company in
         violation of such provisions, so long as the Registrable Securities
         beneficially owned by it are being offered pursuant to the
         Registration Statement.



By its signature below, the Selling Securityholder consents to the disclosure
of the information contained herein to the extent required by the federal and
state securities laws and the rules of the Commission.  The Selling
Securityholder understands that the information that is being furnished to the
Company in this Questionnaire will be relied upon by the Company in connection
with the preparation of the Registration Statement.  The Selling Securityholder
agrees to promptly notify the Company of any changes in such information which
may occur subsequent to the date hereof.


Dated:            , 199  
       ----------      --                         ---------------------------
                                                  Selling Securityholder


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





                                      A-3

<PAGE>   1
                                                                   Exhibit 99.1

Dallas, TX., August 7, 1997...DSC Communications Corporation announced today
the sale of a new issue of $300 million principal amount of 7.0 percent
Convertible Subordinated Notes due August 2004 (the "Notes"), priced at par.
The company has also granted a 30-day option to purchase up to an additional
$100 million aggregate principal amount of the Notes to cover over-allotments.
The Notes will be convertible into the company's common stock, at the option of
the holder, at a conversion price of $49.725 per share.

DSC chairman and chief executive officer, James L. Donald, indicated net
proceeds from the offering will be used for general corporate purposes,
including working capital, capital expenditures, and possible acquisitions and
longer term financing arrangements for customers. Additionally, a portion of
the proceeds could be used to repay all or a portion of outstanding long-term
borrowings.

Neither the Notes nor the common stock issuable upon conversion have been
registered under the Securities Act of 1933 (the "Securities Act") and may not
be offered or sold in the United States except pursuant to an effective
registration statement or an applicable exemption from the registration
requirements of the Securities Act. This press release shall not constitute an
offer to sell or the solicitation of an offer to buy the Notes. This press
release is being issued pursuant to and in accordance with Rule 135c under the
Securities Act.

DSC Communications is a global provider of advanced telecommunications
products, including digital switching, transmission, access and network
management systems. DSC's integrated network solutions support voice, data and
video services, such as intelligent network, wireless, Internet and switched
digital video applications. DSC had annual revenues of approximately $1.4
billion in 1996 and is active in more than 60 countries worldwide.




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