SUN MICROSYSTEMS INC
8-K, 1999-08-06
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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



                                 August 6, 1999
- --------------------------------------------------------------------------------
                Date of Report (Date of earliest event reported):


                             SUN MICROSYSTEMS, INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                 <C>                      <C>
Delaware                              0-15086                   94-2805249
- --------------------------------------------------------------------------------
(State or other jurisdiction        (Commission                (IRS Employer
  of incorporation)                 File Number)             Identification No.)
</TABLE>

<TABLE>
<S>                                                          <C>
901 San Antonio Road, Palo Alto, California                     94303
- --------------------------------------------------------------------------------
(Address of principal executive offices)                      (Zip Code)
</TABLE>

Registrant's telephone number, including area code:             (650) 960-1300
                                                      --------------------------

         N/A
- --------------------------------------------------------------------------------
(Former name or former address, if changed since last report)

<PAGE>   2

ITEM 5.   OTHER EVENTS

     Sun Microsystems, Inc. (the "Company") recently completed a multi-tranche
debt offering of $1,500,000,000 aggregate principal amount of Senior Notes,
issued pursuant to the provisions of the Indenture, dated as of August 1, 1999,
between the Company and The Bank of New York. The Company sold $200,000,000
principal amount of 7.00% Senior Notes due 2002, $250,000,000 principal amount
of 7.35% Senior Notes due 2004, $500,000,000 principal amount of 7.50% Senior
Notes due 2006 and $550,000,000 principal amount of 7.65% Senior Notes due 2009.

     The Senior Notes were offered under a shelf registration statement
declared effective by the Securities and Exchange Commission on July 14, 1999.
The underwriting was managed by Goldman, Sachs & Co. The sale closed on August
4, 1999.

ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS

          (c)   Exhibits

                1.1  Underwriting Agreement, dated July 30, 1999, by and among
                     Sun Microsystems and the underwriters named therein.

                4.1  Indenture, dated as of August 1, 1999 (the "Indenture")
                     between Sun Microsystems, Inc. and The Bank of New York,
                     as trustee.

                4.2  Form of Subordinated Indenture.

                4.3  Officers' Certificate Pursuant to Section 301 of the
                     Indenture, without exhibits, establishing the terms of the
                     Company's Senior Notes.

                4.4  Form of Senior Note.
<PAGE>   3


                                   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.


     Date: August 6, 1999              SUN MICROSYSTEMS, INC.



                                       By: /s/  MICHAEL E. LEHMAN
                                           ------------------------------
                                           Michael E. Lehman
                                           Vice President, Corporate Resources
                                           and Chief Financial Officer

<PAGE>   4

                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>
Exhibit
- -------
<S>           <C>
1.1           Underwriting Agreement, dated July 30, 1999, by and among
              Sun Microsystems and the underwriters named therein.

4.1           Indenture, dated as of August 1, 1999 (the "Indenture")
              between Sun Microsystems, Inc. and The Bank of New York,
              as trustee.

4.2           Form of Subordinated Indenture.

4.3           Officers' Certificate Pursuant to Section 301 of the
              Indenture, without exhibits, establishing the terms of the
              Company's Senior Notes.

4.4           Form of Senior Note.

</TABLE>

<PAGE>   1
                             SUN MICROSYSTEMS, INC.

                                 DEBT SECURITIES



                             UNDERWRITING AGREEMENT


                                                                   July 30, 1999


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

Ladies and Gentlemen:

        From time to time Sun Microsystems, Inc., a Delaware corporation (the
"Company"), proposes to enter into one or more Pricing Agreements (each a
"Pricing Agreement") in the form of Annex I hereto, with such additions and
deletions as the parties thereto may determine, and, subject to the terms and
conditions stated herein and therein, to issue and sell to the firms named in
Schedule I to the applicable Pricing Agreement (such firms constituting the
"Underwriters" with respect to such Pricing Agreement and the securities
specified therein) certain of its debt securities (the "Securities") specified
in Schedule II to such Pricing Agreement (with respect to such Pricing
Agreement, the "Designated Securities").

        The terms and rights of any particular issuance of Designated Securities
shall be as specified in the Pricing Agreement relating thereto and in or
pursuant to the indenture (the "Indenture") identified in such Pricing
Agreement.

        1.      Particular sales of Designated Securities may be made from time
to time to the Underwriters of such Securities, for whom the firms designated as
representatives of the Underwriters of such Securities in the Pricing Agreement
relating thereto will act as representatives (the "Representatives"). The term
"Representatives" also refers to a single firm acting as sole representative of
the Underwriters and to an Underwriter or Underwriters who act without any firm
being designated as its or their representatives. This Underwriting Agreement
shall not be construed as an obligation of the Company to sell any of the
Securities or as an obligation of any of the Underwriters to purchase the
Securities. The obligation of the Company to issue and sell any of the
Securities and the obligation of any of the Underwriters to purchase any of the
Securities shall be evidenced by the Pricing Agreement with respect to the
Designated Securities specified therein. Each Pricing Agreement shall specify
the aggregate principal amount of such Designated Securities, the initial public
offering price of such


<PAGE>   2
Designated Securities, the purchase price to the Underwriters of such Designated
Securities, the names of the Underwriters of such Designated Securities, the
names of the Representatives of such Underwriters and the principal amount of
such Designated Securities to be purchased by each Underwriter and shall set
forth the date, time and manner of delivery of such Designated Securities and
payment therefor. The Pricing Agreement shall also specify (to the extent not
set forth in the Indenture and the registration statement and prospectus with
respect thereto) the terms of such Designated Securities. A Pricing Agreement
shall be in the form of an executed writing (which may be in counterparts), and
may be evidenced by an exchange of telegraphic communications or any other rapid
transmission device designed to produce a written record of communications
transmitted. The obligations of the Underwriters under this Agreement and each
Pricing Agreement shall be several and not joint.

        2.      The Company represents and warrants to, and agrees with, each of
the Underwriters that:

                (a)     A registration statement on Form S-3 (File No.
        333-81101) (the "Initial Registration Statement") in respect of the
        Securities has been filed with the Securities and Exchange Commission
        (the "Commission"); the Initial Registration Statement and any
        post-effective amendment thereto, each in the form heretofore delivered
        or to be delivered to the Representatives and, excluding exhibits to the
        Initial Registration Statement, but including all documents incorporated
        by reference in the prospectus contained therein, to the Representatives
        for each of the other Underwriters, have been declared effective by the
        Commission in such form; other than a registration statement, if any,
        increasing the size of the offering (a "Rule 462(b) Registration
        Statement"), filed pursuant to Rule 462(b) under the Securities Act of
        1933, as amended (the "Act"), which became effective upon filing, no
        other document with respect to the Initial Registration Statement or
        document incorporated by reference therein has heretofore been filed or
        transmitted for filing with the Commission (other than prospectuses
        filed pursuant to Rule 424(b) of the rules and regulations of the
        Commission under the Act, each in the form heretofore delivered to the
        Representatives); and no stop order suspending the effectiveness of the
        Initial Registration Statement, any post-effective amendment thereto or
        the Rule 462(b) Registration Statement, if any, has been issued and no
        proceeding for that purpose has been initiated or threatened by the
        Commission (any preliminary prospectus included in the Initial
        Registration Statement or filed with the Commission pursuant to Rule
        424(a) under the Act, is hereinafter called a "Preliminary Prospectus";
        the various parts of the Initial Registration Statement, any
        post-effective amendment thereto and the Rule 462(b) Registration
        Statement, if any, including all exhibits thereto and the documents
        incorporated by reference in the prospectus contained in the Initial
        Registration Statement at the time such part of the Initial Registration
        Statement became effective but excluding Form T-1, each as amended at
        the time such part of the Initial Registration Statement became
        effective or such part of the Rule 462(b) Registration Statement, if
        any, became or hereafter becomes effective, are hereinafter collectively
        called the "Registration Statement"; the prospectus relating to the
        Securities, in the form in which it has most recently been filed, or
        transmitted for filing, with the Commission on or prior to the date of
        this Agreement, being hereinafter called the "Prospectus"; any reference
        herein to any Preliminary Prospectus or the Prospectus shall be deemed
        to refer to and include the documents incorporated by reference therein
        pursuant to the applicable form under the Act, as of the date of such
        Preliminary Prospectus or Prospectus, as the case may be; any reference
        to any amendment or


<PAGE>   3
        supplement to any Preliminary Prospectus or the Prospectus shall be
        deemed to refer to and include any documents filed after the date of
        such Preliminary Prospectus or Prospectus, as the case may be, under the
        Securities Exchange Act of 1934, as amended (the "Exchange Act"), and
        incorporated by reference in such Preliminary Prospectus or Prospectus,
        as the case may be; any reference to any amendment to the Initial
        Registration Statement shall be deemed to refer to and include any
        annual report of the Company filed pursuant to Sections 13(a) or 15(d)
        of the Exchange Act after the effective date of the Initial Registration
        Statement that is incorporated by reference in the Registration
        Statement; and any reference to the Prospectus as amended or
        supplemented shall be deemed to refer to the Prospectus as amended or
        supplemented in relation to the applicable Designated Securities in the
        form in which it is filed with the Commission pursuant to Rule 424(b)
        under the Act in accordance with Section 5(a) hereof, including any
        documents incorporated by reference therein as of the date of such
        filing);

                (b)     The documents incorporated by reference in the
        Prospectus, when they became effective or were filed with the
        Commission, as the case may be, conformed in all material respects to
        the requirements of the Act or the Exchange Act, as applicable, and the
        rules and regulations of the Commission thereunder, and none of such
        documents contained an untrue statement of a material fact or omitted to
        state a material fact required to be stated therein or necessary to make
        the statements therein not misleading; and any further documents so
        filed and incorporated by reference in the Prospectus or any further
        amendment or supplement thereto, when such documents become effective or
        are filed with the Commission, as the case may be, will conform in all
        material respects to the requirements of the Act or the Exchange Act, as
        applicable, and the rules and regulations of the Commission thereunder
        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; 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 an Underwriter of Designated
        Securities through the Representatives expressly for use in the
        Prospectus as amended or supplemented relating to such Securities;

                (c)     The Registration Statement conforms, and the Prospectus
        and any further amendments or supplements to the Registration Statement
        or the Prospectus will conform, in all material respects to the
        requirements of the Act and the Trust Indenture Act of 1939, as amended
        (the "Trust Indenture Act") and the rules and regulations of the
        Commission thereunder, and such documents do not and will not, as of the
        applicable effective date as to the Registration Statement and any
        amendment thereto, and as of the applicable filing date as to the
        Prospectus and any amendment or supplement thereto, 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; 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
        the Underwriters expressly for use therein.

                (d)     No order preventing or suspending the use of the
        Registration Statement or any Prospectus has been issued by the
        Commission;


<PAGE>   4
                (e)     The Company and its subsidiaries, taken as a whole, have
        not sustained since the date of the latest audited financial statements
        included or incorporated by reference in the Prospectus 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, otherwise than
        as set forth or contemplated in the Prospectus; and, since the
        respective dates as of which information is given in the Registration
        Statement and the Prospectus, there has not been any material change in
        the capital stock or long-term debt of the Company or any of its
        subsidiaries or any material adverse change, or any development
        involving a prospective material adverse 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 Prospectus;

                (f)     The Company has been duly incorporated and is validly
        existing as a corporation in good standing under the laws of the
        jurisdiction of its incorporation, with full power and authority
        (corporate and other) to own, lease and operate its properties and
        conduct its business as described in the Prospectus; the Company is duly
        qualified to do business as a foreign corporation in good standing in
        California, Massachusetts, Colorado and Oregon. Such states are the only
        states where the Company has material facilities to conduct its business
        as described in the Prospectus. The Company now holds, and at each Time
        of Delivery (hereinafter defined) will hold, all licenses, certificates,
        and permits from state, federal and other domestic regulatory
        authorities which are material to the conduct of its business as
        presently conducted; the Company is not (i) in violation of its
        Certificate of Incorporation or By-laws or (ii) in default in the
        performance or observance of any material obligation, agreement,
        covenant or condition contained in any material bond, debenture, note or
        other evidence of indebtedness or in any material contract, indenture,
        mortgage, loan agreement, joint venture or other agreement or instrument
        to which the Company is a party or by which it or any of its properties
        may be bound or (iii) in material violation of any law, order, rule,
        regulation, writ injunction or decree of any government, governmental
        instrumentality or court, domestic or foreign, of which it has knowledge
        except where in the case of clauses (ii) and (iii) such violation or
        default would not have a material adverse effect on the business,
        operations or financial condition of the Company and the subsidiaries
        taken as a whole;

                (g)     The Company has an authorized capitalization as set
        forth in the Prospectus, and all of the issued shares of capital stock
        of the Company have been duly and validly authorized and issued and are
        fully paid and non-assessable;

                (h)     The Securities have been duly authorized, and, when
        Designated Securities are issued and delivered pursuant to this
        Agreement and the Pricing Agreement with respect to such Designated
        Securities, such Designated Securities will have been duly executed,
        authenticated, issued and delivered and will constitute valid and
        legally binding obligations of the Company entitled to the benefits
        provided by the Indenture, which will be substantially in the form filed
        as an exhibit to the Registration Statement; the Indenture has been duly
        authorized and duly qualified under the Trust Indenture Act and, at the
        Time of Delivery for such Designated Securities (as defined in Section 4
        hereof), the Indenture will constitute a valid and legally binding
        instrument,


<PAGE>   5
        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 rules of
        law governing specific performance, injunctive relief and general equity
        principles; and the Indenture conforms, and the Designated Securities
        will conform, to the descriptions thereof contained in the Prospectus as
        amended or supplemented with respect to such Designated Securities;

                (i)     The issue and sale of the Securities and the compliance
        by, the Company with all of the provisions of the Securities, the
        Indenture, this Agreement and any Pricing 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 under, any indenture,
        mortgage, deed of trust, loan agreement bond, debenture, note agreement,
        or other evidence of indebtedness, lease or contract or other material
        agreement or instrument to which the Company is a party or by which the
        Company is bound or to which any of the property or assets of the
        Company is subject, nor will such action result in any violation of the
        provisions of the Certificate of Incorporation, as amended, or 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 of its 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 issue
        and sale of the Securities or the consummation by the Company of the
        transactions contemplated by this Agreement or any Pricing Agreement or
        the Indenture, except such as have been, or will have been prior to the
        Time of Delivery, obtained under the Act and the Trust Indenture Act and
        such consents, approvals, authorizations, registrations or
        qualifications as may be required by the National Association of
        Securities Dealers or under state securities or Blue Sky laws in
        connection with the purchase and distribution of the Securities by the
        Underwriters;

                (j)     The statements set forth in the Prospects under the
        caption "Description of the Debt Securities", insofar as they purport to
        constitute a summary of the terms of the Securities, and under the
        caption "Plan of Distribution" insofar as they purport to describe the
        provisions of the laws and documents referred to therein, are accurate,
        complete and fair;

                (k)     Neither the Company nor any of its subsidiaries is in
        violation of its Certificate of Incorporation or By-laws or in default
        in the performance or observance of any material obligation, agreement,
        covenant or condition contained in any indenture, mortgage, deed of
        trust, loan agreement, lease or other agreement or instrument to which
        it is a party or by which it or any of its properties may be bound;

                (l)     Other than as set forth or contemplated in the
        Prospectus, there are no legal or governmental proceedings pending to
        which the Company or any of its subsidiaries is a party or of which any
        property of the Company or any of its subsidiaries is the subject which
        are required to be disclosed in the Prospectus, or which could
        reasonably be expected, individually or in the aggregate to have a
        material adverse effect on the consolidated financial position,
        stockholders' equity or results of operations of the Company and its
        subsidiaries; and, to the Company's knowledge, no such


<PAGE>   6
        proceedings are threatened in writing by governmental authorities or
        threatened in writing by others;

                (m)     The Company is not and, after giving effect to the
        offering and sale of the Securities, will not be an "investment
        company", as such term is defined in the Investment Company Act of 1940,
        as amended (the "Investment Company Act");

                (n)     Except as disclosed in the Prospectus, neither the
        Company nor any of its subsidiaries has received any notice of
        infringement of or conflict with asserted rights of others with respect
        to any patents, patent rights, inventions, trade secrets, know-how,
        proprietary techniques, including processes and substances, trademarks,
        service marks, trade names, or copyrights which, singly or in the
        aggregate, could reasonably be expected to have a material adverse
        effect on the business, operations, financial condition, income or
        business prospects of the Company and its subsidiaries taken as a whole;

                (o)     Ernst & Young LLP, who have certified certain financial
        statements of the Company and its subsidiaries, are independent public
        accountants as required by the Act and the rules and regulations of the
        Commission thereunder; and

                (p)     The Company has reviewed its operations and that of its
        subsidiaries and has commenced an audit with respect to third parties
        with which the Company or any of its subsidiaries has a material
        relationship to evaluate the extent to which the business or operations
        of the Company or any of its subsidiaries will be affected by the Year
        2000 Problem. As a result of such review (and only with respect to such
        third parties that the Company has completed its audit for), the Company
        has no particular reason to believe, and therefore does not believe,
        that the Year 2000 Problem will have a material adverse effect on the
        Company's consolidated financial position, business prospects,
        stockholders' equity or results of operations of the Company and its
        subsidiaries or result in any material loss or interference with the
        Company's business or operations. The "Year 2000 Problem" as used herein
        means any significant risk that computer hardware or software used in
        the receipt, transmission, processing, manipulation, storage, retrieval,
        retransmission or other utilization of data or in the operation of
        mechanical or electrical systems of any kind will not, in the case of
        dates or time periods occurring after December 31, 1999, function at
        least as effectively as in the case of dates or time periods occurring
        prior to January 1, 2000.

        3.      Upon the execution of the Pricing Agreement applicable to any
Designated Securities and authorization by the Representatives of the release of
such Designated Securities, the several Underwriters propose to offer such
Designated Securities for sale upon the terms and conditions set forth in the
Prospectus as amended or supplemented.

        4.      Designated Securities to be purchased by each Underwriter
pursuant to the Pricing Agreement relating thereto, in the form specified in
such Pricing Agreement, and in such authorized denominations and registered in
such names as the Representatives may request upon at least forty-eight hours'
prior notice to the Company, shall be delivered by or on behalf of the Company
to the Representatives for the account of such Underwriter, against payment by
such Underwriter or on its behalf of the purchase price therefor by wire
transfer of Federal (same-day) funds to the account specified by the Company to
the Representatives at least


<PAGE>   7
forty-eight hours in advance or at such other place and time and date as the
Representatives and the Company may agree upon in writing, such time and date
being herein called the "Time of Delivery" for such Securities.

        5.      The Company agrees with each of the Underwriters of any
Designated Securities:

                (a)     To prepare the Prospectus as amended or supplemented in
        relation to the applicable Designated Securities in a form approved by
        the Representatives and to file such Prospectus pursuant to Rule 424(b)
        under the Act not later than the Commission's close of business on the
        second business day following the execution and delivery of the Pricing
        Agreement relating to the applicable Designated Securities or, if
        applicable, such earlier time as may be required by Rule 424(b); to make
        no further amendment or any supplement to the Registration Statement or
        Prospectus as amended or supplemented after the date of the Pricing
        Agreement relating to such Securities and prior to the Time of Delivery
        for such Securities which shall be disapproved by the Representatives
        for such Securities promptly after reasonable notice thereof; to advise
        the Representatives promptly of any such amendment or supplement after
        such Time of Delivery and furnish the Representatives with copies
        thereof; to file promptly all reports and any definitive proxy or
        information statements required to be filed by the Company with the
        Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange
        Act subsequent to the date of the Prospectus for so long as the delivery
        of a prospectus is required in connection with the offering or sale of
        such Securities, and during such same period to advise the
        Representatives, promptly after it receives notice thereof, of the time
        when any amendment to the Registration Statement has been filed or
        becomes effective or any supplement to the Prospectus or any amended
        Prospectus has been filed with the Commission, of the issuance by the
        Commission of any stop order or of any order preventing or suspending
        the use of any prospectus relating to the Securities, of the suspension
        of the qualification of such Securities for offering or sale in any
        jurisdiction, of the initiation or threatening of any proceeding for any
        such purpose, or of any request by the Commission for the amending or
        supplementing of the Registration Statement or Prospectus or for
        additional information; and, in the event of the issuance of any such
        stop order or of any such order preventing or suspending the use of any
        prospectus relating to the Securities or suspending any such
        qualification, to promptly use its best efforts to obtain the withdrawal
        of such order;

                (b)     Promptly from time to time to take such action as the
        Representatives may reasonably request to qualify such Securities for
        offering and sale under the securities laws of such jurisdictions as the
        Representatives 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, 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;

                (c)     Prior to 10:00 a.m., New York City time, on the New York
        Business Day next succeeding the date of this Agreement and from time to
        time, to furnish the Underwriters with copies of the Prospectus in New
        York City as amended or


<PAGE>   8
        supplemented in such quantities as the Representatives may reasonably
        request, and, if the delivery of a prospectus is required at any time in
        connection with the offering or sale of the Securities and if at such
        time any event shall have occurred as a result of which the Prospectus
        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 Prospectus is delivered, not misleading,
        or, if for any other reason it shall be necessary during such same
        period to amend or supplement the Prospectus or to file under the
        Exchange Act any document incorporated by reference in the Prospectus in
        order to comply with the Act, the Exchange Act or the Trust Indenture
        Act, to notify the Representatives and upon their request to file such
        document and to prepare and furnish without charge to each Underwriter
        and to any dealer in securities as many copies as the Representatives
        may from time to time reasonably request of an amended Prospectus or a
        supplement to the Prospectus which will correct such statement or
        omission or effect such compliance;

                (d)     To make generally available to its securityholders as
        soon as practicable, but in any event not later than eighteen months
        after the effective date of the Registration Statement (as defined in
        Rule 158(c) under the Act), an earnings statement of the Company and its
        subsidiaries (which need not be audited) complying with Section 11(a) of
        the Act and the rules and regulations of the Commission thereunder
        (including, at the option of the Company, Rule 158);

                (e)     During the period beginning from the date of the Pricing
        Agreement for such Designated Securities and continuing to and including
        the later of (i) the termination of trading restrictions for such
        Designated Securities, as notified to the Company by the Representatives
        and (ii) the Time of Delivery for such Designated Securities, not to
        offer, sell, contract to sell or otherwise dispose of any debt
        securities of the Company which mature more than one year after such
        Time of Delivery and which are substantially similar to such Designated
        Securities, without the prior written consent of the Representatives;

                (f)     If the Company elects to rely upon Rule 462(b), the
        Company shall file a Rule 462(b) Registration Statement with the
        Commission in compliance with Rule 462(b) by 10:00 P.M., Washington,
        D.C. time, on the date of this Agreement, and the Company shall at the
        time of filing either pay to the Commission the filing fee for the Rule
        462(b) Registration Statement or give irrevocable instructions for the
        payment of such fee pursuant to Rule 111(b) under the Act;

                (g)     Not to invest, reinvest or otherwise use the proceeds
        received by it from the sale of the Securities to the Underwriters in
        such a manner as would require the Company to register as an investment
        company under the Investment Company Act of 1940.

        6.      The Company covenants and agrees with the several Underwriters
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 in
connection with the registration of the Securities under the Act and all other
expenses in connection with the preparation, printing and filing of the
Registration Statement, any Preliminary Prospectus and the Prospectus and
amendments


<PAGE>   9
and supplements thereto and the mailing and delivering of copies thereof to the
Underwriters and dealers; (ii) the cost of printing or producing any Agreement
among Underwriters, this Agreement, any Pricing Agreement, any Indenture, 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; (iii) all expenses in connection
with the qualification of the Securities for offering and sale under state
securities laws as provided in Section 5(b) hereof, including the fees and
disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky and Legal Investment Surveys;
(iv) any fees charged by securities rating services for rating the Securities;
(v) any filing fees incident to, and the fees and disbursements of counsel for
the Underwriters in connection with, any required review by the National
Association of Securities Dealers, Inc. of the terms of the sale of the
Securities; (vi) the cost of preparing the Securities; (vii) the fees and
expenses of any Trustee and any agent of any Trustee and the fees and
disbursements of counsel for any Trustee in connection with any Indenture and
the Securities; and (viii) all other costs and expenses incident to the
performance of its obligations hereunder which are not otherwise specifically
provided for in this Section. It is understood, however, that, except as
provided in this Section, and Sections 8 and 11 hereof, the Underwriters 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 Underwriters of any Designated Securities
under the Pricing Agreement relating to such Designated Securities shall be
subject, in the discretion of the Representatives, to the condition that all
representations and warranties and other statements of the Company in or
incorporated by reference in the Pricing Agreement relating to such Designated
Securities are, at and as of the Time of Delivery for such Designated
Securities, 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)     The Prospectus as amended or supplemented in relation to
        the applicable Designated Securities shall have been filed with the
        Commission pursuant to Rule 424(b) within the applicable time period
        prescribed for such filing by the rules and regulations under the Act
        and in accordance with Section 5(a) hereof; if the Company has elected
        to rely upon Rule 462(b), the Rule 462(b) Registration Statement shall
        have become effective by 10:00 P.M., Washington, D.C. time, on the date
        of this Agreement; no stop order suspending the effectiveness of the
        Registration Statement or any part thereof shall have been issued and no
        proceeding for that purpose shall have been initiated or threatened by
        the Commission; and all requests for additional information on the part
        of the Commission shall have been complied with to the Representatives'
        reasonable satisfaction;

                (b)     Counsel for the Underwriters shall have furnished to the
        Representatives such written opinion or opinions, dated the Time of
        Delivery for such Designated Securities, with respect to the matters
        covered in paragraphs (i), (iv), (v), (vi) and (x) of subsection (c)
        below as well as such other related matters as the Representatives 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;


<PAGE>   10
                (c)     Wilson Sonsini Goodrich & Rosati, Professional
        Corporation, counsel for the Company, shall have furnished to the
        Representatives their written opinion, dated the Time of Delivery for
        such Designated Securities, in form and substance satisfactory to the
        Representatives, to the effect that:

                        (i)     The Company has been duly incorporated and is
                validly existing as a corporation in good standing under the
                laws of the jurisdiction of its incorporation, with the
                requisite corporate power to own, lease and operate its
                properties and conduct its business as described in the
                Prospectus; and the Company is duly qualified to do business as
                a foreign corporation and is in good standing in California,
                Massachusetts, Colorado and Oregon;

                        (ii)    The Company has an authorized capitalization as
                set forth in its Certificate of Incorporation and as set forth
                in the Prospectus as amended or supplemented;

                        (iii)   To such counsel's knowledge and other than as
                set forth or contemplated in the Prospectus, there are no legal
                or governmental proceedings pending to which the Company or any
                of its subsidiaries is a party or of which any property of the
                Company or any of its subsidiaries is the subject which to such
                counsel's knowledge would individually or in the aggregate have
                a material adverse effect on the consolidated financial
                position, stockholders' equity or results of operations of the
                Company and its subsidiaries; and, to such counsel's knowledge,
                no such proceedings are threatened in writing by governmental
                authorities or by others;

                        (iv)    This Agreement and the Pricing Agreement with
                respect to the Designated Securities have been duly authorized,
                executed and delivered by the Company;

                        (v)     The Designated Securities have been duly
                authorized, 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
                Designated Securities and the Indenture conform in all material
                respects to the descriptions thereof in the Prospectus as
                amended or supplemented;

                        (vi)    The Indenture has been duly authorized, executed
                and delivered by the parties thereto 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 rules of law governing
                specific performance, injunctive relief and general equity
                principles; and the Indenture has been duly qualified under the
                Trust Indenture Act;

                        (vii)   The issue and sale of the Designated Securities
                and the compliance, as of the date hereof, by the Company with
                all of the provisions of the Designated Securities, the
                Indenture, this Agreement and the Pricing Agreement with respect
                to the Designated Securities and the consummation of the
                transactions herein and therein contemplated will not to such
                counsel's


<PAGE>   11
                knowledge, result in a breach or violation of any of the terms
                or provisions of, or constitute a default under, any Reviewed
                Agreements, nor will such actions result in any violation of the
                provisions of the Certificate of Incorporation, as amended, or
                By-laws, as amended, of the Company or to such counsel's
                knowledge any applicable statute or any order, rule or
                regulation known to such counsel of any court or governmental
                agency or body having jurisdiction over the Company or any of
                its properties, other than state securities or Blue Sky laws, as
                to which such counsel need express no opinion. "Reviewed
                Agreements" means those agreements (i) that have been filed as
                an exhibit to the Company's Annual Report on Form 10-K and to
                which the Company or any of its subsidiaries is currently a
                party or by which the Company or any of its subsidiaries is
                currently bound or to which any of the property or assets of the
                Company or any of its subsidiaries is currently subject or (ii)
                that would be required to be filed as an exhibit to the
                Company's Annual Report on Form 10-K if such Annual Report was
                being filed for the first time as of the date of such counsel's
                opinion, as certified by the Company in the Company's Officers'
                Certificate attached as an exhibit to such counsel's opinion;

                        (viii)  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 Designated Securities or the consummation by the Company
                of the other transactions contemplated by this Agreement or such
                Pricing Agreement or the Indenture, except (i) such as have been
                obtained under the Act and the Trust Indenture Act 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
                Designated Securities by the Underwriters and (ii) such as may
                be expressly contemplated by the requirements of this Agreement,
                such Pricing Agreement or the Indenture;

                        (ix)    To such counsel's knowledge the Company is not
                in violation of its By-laws or Certificate of Incorporation;

                        (x)     The statements set forth in the Prospectus under
                the caption "Description of the Debt Securities" insofar as they
                purport to constitute a summary of the terms of the Designated
                Securities and under the caption "Plan of Distribution" insofar
                as they purport to describe the provisions of the laws and
                documents referred to therein, fairly and accurately summarize
                in all material respects such laws and documents;

                        (xi)    The documents incorporated by reference in the
                Prospectus as amended or supplemented (other than the financial
                statements and related schedules therein, as to which such
                counsel need express no opinion), when they became effective or
                were filed with the Commission, as the case may be, complied as
                to form in all material respects with the requirements of the
                Act or the Exchange Act, as applicable, and the rules and
                regulations of the Commission thereunder;


<PAGE>   12
                        (xii)   The Registration Statement and the Prospectus as
                amended or supplemented and any further amendments and
                supplements thereto made by the Company prior to the Time of
                Delivery for the Designated Securities (other than the financial
                statements and related schedules therein, as to which such
                counsel need express no opinion) comply as to form in all
                material respects with the requirements of the Act, the Exchange
                Act and the Trust Indenture Act and the rules and regulations
                thereunder.

                Such counsel shall also state that although they do not assume
                any responsibility for the accuracy, completeness or fairness of
                the statements contained in the Registration Statement or the
                Prospectus, except for those referred to in the opinion in
                subsection (x) of this Section 7(c), they have no reason to
                believe that, as of its effective date, the Registration
                Statement or any further amendment thereto made by the Company
                prior to the Time of Delivery (except for financial statements
                and schedules included or incorporated by reference therein or
                omitted therefrom and financial information derived, as to which
                we have not been requested to comment) contained an untrue
                statement of a material fact or omitted to state a material fact
                required to be stated therein or necessary to make the
                statements therein not misleading or that, as of its date, the
                Prospectus as amended or supplemented or any further amendment
                or supplement thereto made by the Company prior to the Time of
                Delivery (except for financial statements and schedules included
                or incorporated by reference therein or omitted therefrom and
                financial information derived, as to which we have not been
                requested to comment) contained an untrue statement of a
                material fact or omitted 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 that, as of the
                Time of Delivery, either the Registration Statement or the
                Prospectus as amended or supplemented or any further amendment
                or supplement thereto made by the Company prior to the Time of
                Delivery (except for financial statements and schedules included
                or incorporated by reference therein or omitted therefrom and
                financial information derived, as to which we have not been
                requested to comment) contains an untrue statement of a material
                fact or 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;

                (d)     On the date of the Pricing Agreement for such Designated
        Securities at a time prior to the execution of the Pricing Agreement
        with respect to such Designated Securities and at the Time of Delivery
        for such Designated Securities, the independent accountants of the
        Company who have certified the financial statements of the Company and
        its subsidiaries included or incorporated by reference in the
        Registration Statement shall have furnished to the Representatives a
        letter, dated the effective date of the Registration Statement or the
        date of the most recent report filed with the Commission containing
        financial statements and incorporated by reference in the Registration
        Statement, if the date of such report is later than such effective date,
        and a letter dated such Time of Delivery, respectively, to the effect
        set forth in Annex II hereto, and with respect to such letter dated such
        Time of Delivery, as to such other matters as the Representatives may
        reasonably request and in form and substance satisfactory to the
        Representatives (the executed copy of the letter delivered prior to the
        execution of


<PAGE>   13
        this Agreement is attached as Annex I(a) hereto and a draft of the form
        of letter to be delivered on the effective date of any post-effective
        amendment to the Registration Statement and as of each Time of Delivery
        is attached as Annex I(b) hereto);

                (e)     (i) Neither the Company nor any of its subsidiaries
        shall have sustained since the date of the latest audited financial
        statements included or incorporated by reference in the Prospectus as
        amended prior to the date of the Pricing Agreement relating to the
        Designated Securities 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
        Prospectus as amended prior to the date of the Pricing Agreement
        relating to the Designated Securities, and (ii) since the respective
        dates as of which information is given in the Prospectus as amended
        prior to the date of the Pricing Agreement relating to the Designated
        Securities 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 Prospectus as amended prior to
        the date of the Pricing Agreement relating to the Designated Securities,
        the effect of which, in any such case described in clause (i) or (ii),
        is in the judgment of the Representatives so material and adverse as to
        make it impracticable or inadvisable to proceed with the public offering
        or the delivery of the Designated Securities on the terms and in the
        manner contemplated in the Prospectus as first amended or supplemented
        relating to the Designated Securities;

                (f)     On or after the date of the Pricing Agreement relating
        to the Designated Securities (i) no downgrading shall have occurred in
        the rating accorded the Company's debt securities or preferred stock 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 or
        preferred stock;

                (g)     On or after the date of the Pricing Agreement relating
        to the Designated Securities 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 declared by either Federal
        or New York State authorities; or (iv) the outbreak or escalation of
        hostilities involving the United States or the declaration by the United
        States of a national emergency or war, if the effect of any such event
        specified in this clause (iv) in the judgment of the Representatives
        makes it impracticable or inadvisable to proceed with the public
        offering or the delivery of the Designated Securities on the terms and
        in the manner contemplated in the Prospectus as first amended or
        supplemented relating to the Designated Securities;

                (h)     The Company shall have complied with the provisions of
        Section 5(c) hereof with respect to the furnishing of prospectuses on
        the New York Business Day next succeeding the date of this Agreement;
        and


<PAGE>   14
                (i)     The Company shall have furnished or caused to be
        furnished to the Representatives at the Time of Delivery for the
        Designated Securities a certificate or certificates of officers of the
        Company satisfactory to the Representatives 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 subsections (a) and (e) of this
        Section and as to such other matters as the Representatives may
        reasonably request.

        8.      (a) The Company will indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter 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 any Preliminary Prospectus, any
preliminary prospectus supplement, the Registration Statement, the Prospectus as
amended or supplemented and any other prospectus relating to the Securities, 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
will reimburse each Underwriter for any legal or other expenses reasonably
incurred by such Underwriter 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 arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in any Preliminary
Prospectus, any preliminary prospectus supplement, the Registration Statement,
the Prospectus as amended or supplemented and any other prospectus relating to
the Securities, or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
of Designated Securities through the Representatives expressly for use in the
Prospectus as amended or supplemented relating to such Securities.

                (b)     Each Underwriter will indemnify and hold harmless the
        Company against any losses, claims, damages or liabilities to which the
        Company 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 any Preliminary Prospectus,
        any preliminary prospectus supplement, the Registration Statement, the
        Prospectus as amended or supplemented and any other prospectus relating
        to the Securities, 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 any Preliminary Prospectus, any
        preliminary prospectus supplement, the Registration Statement, the
        Prospectus as amended or supplemented and any other prospectus relating
        to the Securities, or any such amendment or supplement in reliance upon
        and in conformity with written information furnished to the Company by
        such Underwriter through the Representatives expressly


<PAGE>   15
        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 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 Underwriters of the Designated
        Securities on the other from the offering of the Designated Securities
        to which such loss, claim, damage or liability (or action in respect
        thereof) relates. 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 Underwriters
        of the Designated Securities 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 such Underwriters on the other shall be
        deemed to be in the same proportion as the total net proceeds from


<PAGE>   16
        such offering (before deducting expenses) received by the Company bear
        to the total underwriting discounts and commissions received by such
        Underwriters. 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
        such Underwriters 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 Underwriters 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
        Underwriters 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 Underwriter
        shall be required to contribute any amount in excess of the amount by
        which the total price at which the applicable Designated Securities
        underwritten by it and distributed to the public were offered to the
        public exceeds the amount of any damages which such Underwriter has
        otherwise been required to pay by reason of such untrue or alleged
        untrue statement or omission or alleged omission. No person guilty of
        fraudulent misrepresentation (within the meaning of Section 11(f) of the
        Act) shall be entitled to contribution from any person who was not
        guilty of such fraudulent misrepresentation. The obligations of the
        Underwriters of Designated Securities in this subsection (d) to
        contribute are several in proportion to their respective underwriting
        obligations with respect to such Securities and not joint.

                (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 Underwriter within the meaning of the
        Act; and the obligations of the Underwriters under this Section 8 shall
        be in addition to any liability which the respective Underwriters 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 Underwriter shall default in its obligation to
purchase the Designated Securities which it has agreed to purchase under the
Pricing Agreement relating to such Designated Securities, the Representatives
may in their discretion arrange for themselves or another party or other parties
to purchase such Designated Securities on the terms contained herein. If within
thirty-six hours after such default by any Underwriter the Representatives do
not arrange for the purchase of such Designated 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 the Representatives to
purchase such Designated Securities on such terms. In the event that, within the
respective prescribed period, the Representatives notify the Company that they
have so arranged for the purchase of such Designated Securities, or the Company
notifies the Representatives that it has so arranged for the purchase of such
Designated Securities, the Representatives or the Company shall have the right
to


<PAGE>   17
postpone the Time of Delivery for such Designated Securities for a period of not
more than seven days, in order to effect whatever changes may thereby be made
necessary in the Registration Statement or the Prospectus as amended or
supplemented, or in any other documents or arrangements, and the Company agrees
to file promptly any amendments or supplements to the Registration Statement or
the Prospectus which in the opinion of the Representatives may thereby be made
necessary. The term "Underwriter" 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 the Pricing Agreement with respect to such Designated
Securities.

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

                (c)     If, after giving effect to any arrangements for the
        purchase of the Designated Securities of a defaulting Underwriter or
        Underwriters by the Representatives and the Company as provided in
        subsection (a) above, the aggregate principal amount of Designated
        Securities which remains unpurchased exceeds one-eleventh of the
        aggregate principal amount of the Designated Securities, as referred to
        in subsection (b) above, or if the Company shall not exercise the right
        described in subsection (b) above to require non-defaulting Underwriters
        to purchase Designated Securities of a defaulting Underwriter or
        Underwriters, then the Pricing Agreement relating to such Designated
        Securities shall thereupon terminate, without liability on the part of
        any non-defaulting Underwriter or the Company, except for the expenses
        to be borne by the Company and the Underwriters as provided in Section 6
        hereof and the indemnity and contribution agreements in Section 8
        hereof; but nothing herein shall relieve a defaulting Underwriter from
        liability for its default.

        10.     The respective indemnities, agreements, representations,
warranties and other statements of the Company and the several Underwriters, 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 Underwriter or any controlling person of any Underwriter, or the
Company, or any officer or director or controlling person of the Company, and
shall survive delivery of and payment for the Securities.

        11.     If any Pricing Agreement shall be terminated pursuant to Section
9 hereof, the Company shall not then be under any liability to any Underwriter
with respect to the Designated


<PAGE>   18
Securities covered by such Pricing Agreement except as provided in Sections 6
and 8 hereof; but, if for any other reason Designated Securities are not
delivered by or on behalf of the Company as provided herein, the Company will
reimburse the Underwriters through the Representatives for all out-of-pocket
expenses approved in writing by the Representatives, including fees and
disbursements of counsel, reasonably incurred by the Underwriters in making
preparations for the purchase, sale and delivery of such Designated Securities,
but the Company shall then be under no further liability to any Underwriter with
respect to such Designated Securities except as provided in Sections 6 and 8
hereof.

        12.     In all dealings hereunder, the Representatives of the
Underwriters of Designated Securities shall act on behalf of each of such
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by such Representatives jointly or by such of the Representatives, if any,
as may be designated for such purpose in the Pricing Agreement.

        All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to the address of the Representatives as set forth in the
Pricing Agreement; 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
Registration Statement: Attention: Secretary; provided, however, that any notice
to an Underwriter pursuant to Section 8(c) hereof shall be delivered or sent by
mail, telex or facsimile transmission to such Underwriter at its address set
forth in its Underwriters' Questionnaire, or telex constituting such
Questionnaire, which address will be supplied to the Company by the
Representatives upon request. Any such statements, requests, notices or
agreements shall take effect upon receipt thereof.

        13.     This Agreement and each Pricing Agreement shall be binding upon,
and inure solely to the benefit of, the Underwriters, 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 Underwriter, 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 or any such Pricing Agreement. No purchaser of any of the Securities
from any Underwriter shall be deemed a successor or assign by reason merely of
such purchase.

        14.     Time shall be of the essence of each Pricing Agreement. As used
herein, "business day" shall mean any day when the Commission's office in
Washington, D.C. is open for business.

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


<PAGE>   19
        16.     This Agreement and each Pricing Agreement may be executed by any
one or more of the parties hereto and thereto in any number of counterparts,
each of which shall be deemed to be an original, but all such respective
counterparts shall together constitute one and the same instrument.

                                       Very truly yours,

                                       Sun Microsystems, Inc.


                                       By:______________________________________
                                          Name:
                                          Title:


Accepted as of the date hereof:

Goldman, Sachs & Co.



        (Goldman, Sachs & Co.)


<PAGE>   20
                                                                       ANNEX   I


                                PRICING AGREEMENT


                                                              July [     ], 1999


Goldman, Sachs & Co.,
[NAMES OF CO-REPRESENTATIVE(S),]
  As Representatives of the several
    Underwriters named in Schedule I hereto,
[C/O GOLDMAN, SACHS & CO.,]
85 Broad Street,
New York, New York  10004

Ladies and Gentlemen:

        Sun Microsystems, Inc., a Delaware corporation (the "Company"),
proposes, subject to the terms and conditions stated herein and in the
Underwriting Agreement, dated July [ ], 1999 (the "Underwriting Agreement"),
between the Company on the one hand and Goldman, Sachs & Co. on the other hand,
to issue and sell to the Underwriters named in Schedule I hereto (the
"Underwriters") the Securities specified in Schedule II hereto (the "Designated
Securities"). Each of the provisions of the Underwriting Agreement is
incorporated herein by reference in its entirety, and shall be deemed to be a
part of this Agreement to the same extent as if such provisions had been set
forth in full herein; and each of the representations and warranties set forth
therein shall be deemed to have been made at and as of the date of this Pricing
Agreement, except that each representation and warranty which refers to the
Prospectus in Section 2 of the Underwriting Agreement shall be deemed to be a
representation or warranty as of the date of the Underwriting Agreement in
relation to the Prospectus (as therein defined), and also a representation and
warranty as of the date of this Pricing Agreement in relation to the Prospectus
as amended or supplemented relating to the Designated Securities which are the
subject of this Pricing Agreement. Each reference to the Representatives herein
and in the provisions of the Underwriting Agreement so incorporated by reference
shall be deemed to refer to you. Unless otherwise defined herein, terms defined
in the Underwriting Agreement are used herein as therein defined. The
Representatives designated to act on behalf of the Representatives and on behalf
of each of the Underwriters of the Designated Securities pursuant to Section 12
of the Underwriting Agreement and the address of the Representatives referred to
in such Section 12 are set forth at the end of Schedule II hereto.

        An amendment to the Registration Statement, or a supplement to the
Prospectus, as the case may be, relating to the Designated Securities, in the
form heretofore delivered to you is now proposed to be filed with the
Commission.

        Subject to the terms and conditions set forth herein and in the
Underwriting Agreement incorporated herein by reference, the Company agrees to
issue and sell to each of the Underwriters, and each of the Underwriters agrees,
severally and not jointly, to purchase from the Company, at the time and place
and at the purchase price to the Underwriters set forth in


<PAGE>   21
Schedule II hereto, the principal amount of Designated Securities set forth
opposite the name of such Underwriter in Schedule I hereto.

        If the foregoing is in accordance with your understanding, please sign
and return to us one for the Company and each of the Representatives plus one
for each counsel counterparts hereof, and upon acceptance hereof by you, on
behalf of each of the Underwriters, this letter and such acceptance hereof,
including the provisions of the Underwriting Agreement incorporated herein by
reference, shall constitute a binding agreement between each of the Underwriters
and the Company. It is understood that your acceptance of this letter on behalf
of each of the Underwriters is or will be pursuant to the authority set forth in
a form of Agreement among Underwriters, the form of which shall be submitted to
the Company for examination upon request, but without warranty on the part of
the Representatives as to the authority of the signers thereof.

                                        Very truly yours,

                                        Sun Microsystems, Inc,

                                        By:_____________________________________
                                           Name:
                                           Title:


Accepted as of the date hereof:

Goldman, Sachs & Co.



        (Goldman, Sachs & Co.)


<PAGE>   22
                                   SCHEDULE I


<TABLE>
<CAPTION>
Underwriter                                                         Principal Amount of
                                                                Designated Securities to be
                                                                         Purchased

<S>                                                            <C>
Goldman, Sachs & Co.                                           $
[NAME(S) OF OTHER CO-REPRESENTATIVE(S)]
[NAMES OF OTHER UNDERWRITERS]
                                                               ----------------------------
</TABLE>


<PAGE>   23
                                   SCHEDULE II


TITLE OF DESIGNATED SECURITIES:

         [  %] [Floating Rate] [Zero Coupon] [Notes]
         [Debentures] due           ,

AGGREGATE PRINCIPAL AMOUNT:
[$]

PRICE TO PUBLIC:
        % of  the principal amount of the Designated Securities, plus accrued
        interest[,  if  any,]  from          to          [and accrued
        amortization[, if any,] from                 to           ]

PURCHASE PRICE BY UNDERWRITERS:
        % of the principal amount of the Designated Securities, plus accrued
        interest from          to          [and accrued amortization[, if any,]
        from                      to                    ]

FORM OF DESIGNATED SECURITIES:
        [Definitive form to be made available for checking and packaging at
        least twenty-four hours prior to the Time of Delivery at the office of
        [The Depository Trust Company or its designated custodian] [the
        Representatives]]

        [Book-entry only form represented by one or more global securities
        deposited with The Depository Trust Company ("DTC") or its designated
        custodian, to be made available for checking by the Representatives at
        least twenty-four hours prior to the Time of Delivery at the office of
        DTC.]

SPECIFIED FUNDS FOR PAYMENT OF PURCHASE PRICE:
        Federal (same day) funds

TIME OF DELIVERY:
        a.m. (New York City time),                      , 19

INDENTURE:
        Indenture dated                    , 19         , between the Company
        and                  , as Trustee

MATURITY:

INTEREST RATE:
        [   %] [Zero Coupon] [See Floating Rate Provisions]

INTEREST PAYMENT DATES:
        [months and dates, commencing ....................., 19..]

REDEMPTION PROVISIONS:
        [No provisions for redemption]


<PAGE>   24
        [The Designated Securities may be redeemed, otherwise than through the
        sinking fund, in whole or in part at the option of the Company, in the
        amount of [$     ] or an integral multiple thereof,

        [on or after       , at the following redemption prices (expressed in
        percentages of principal amount). If [redeemed on or before         ,
        %, and if] redeemed during the 12-month period beginning               ,

                Year                          Redemption Price
                ----                          ----------------



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

        [on any interest payment date falling on or after             ,     , at
        the election of the Company, at a redemption price equal to the
        principal amount thereof, plus accrued interest to the date of
        redemption.]]

        [Other possible redemption provisions, such as mandatory redemption upon
        occurrence of certain events or redemption for changes in tax law]

        [Restriction on refunding]

SINKING FUND PROVISIONS:
        [No sinking fund provisions]

        [The Designated Securities are entitled to the benefit of a sinking fund
        to retire [$     ] principal amount of Designated Securities on in each
        of the years    through      at 100% of their principal amount
        ________________ plus accrued interest[, together with [cumulative]
        [noncumulative] redemptions at the option of the Company to retire an
        additional [$ ] principal amount of Designated Securities in the years
        through at 100% of their principal amount plus accrued interest.]

[If Designated Securities are extendable debt securities, insert--
EXTENDABLE PROVISIONS:

        Designated Securities are repayable on           ,            [insert
        date and years], at the option of the holder, at their principal amount
        with accrued interest. The initial annual interest rate will be    %,
        and thereafter the annual interest rate will be adjusted on           ,
        ________________ and to a rate not less than    % of the effective
        annual interest rate on U.S. Treasury obligations with            -year
        maturities as of the [insert date 15 days prior to maturity date] prior
        to such [insert maturity date].]


<PAGE>   25
[If Designated Securities are floating rate debt securities, insert-- FLOATING
RATE PROVISIONS:
        Initial annual interest rate will be    % through            [and
        thereafter will be adjusted [monthly] [on each            ,            ,
        and            ] [to an annual rate of    % above the average rate for
        -year [month][securities][certificates of deposit] issued by
        and            [insert names of banks].] [and the annual interest rate
        [thereafter] [from            through            ] will be the interest
        yield equivalent of the weekly average per annum market discount rate
        for    -month Treasury bills plus   % of Interest Differential (the
        excess, if any, of (i) the then current weekly average per annum
        secondary market yield for    -month certificates of deposit over (ii)
        the then current interest yield equivalent of the weekly average per
        annum market discount rate for    -month Treasury bills); [from
        and thereafter the rate will be the then current interest yield
        equivalent plus   % of Interest Differential].]

DEFEASANCE PROVISIONS:

CLOSING LOCATION FOR DELIVERY OF DESIGNATED SECURITIES:

ADDITIONAL CLOSING CONDITIONS:
        Paragraph 7(g) of the Underwriting Agreement should be modified in the
        event that the Securities are denominated in, indexed to, or principal
        or interest are paid in, a currency other than the U.S. dollar, more
        than one currency or in a composite currency. The country or countries
        issuing such currency should be added to the banking moratorium and
        hostilities clauses and the following additional clause should be added
        to the paragraph (the entire paragraph should be restated, as amended):

                "; ( ) the imposition of the proposal of exchange controls by
        any governmental authority in [insert the country or countries issuing
        such currency, currencies or composite currency]".

NAMES AND ADDRESSES OF REPRESENTATIVES:
        Designated Representatives:
        Address for Notices, etc.:

[OTHER TERMS]:


<PAGE>   26
                                    ANNEX II


        Pursuant to Section 7(d) of the Underwriting Agreement, the accountants
shall furnish letters to the Underwriters to the effect that:

                (i)     They are independent certified public accountants with
        respect to the Company and its subsidiaries within the meaning of the
        Act and the applicable rules and regulations adopted by the Commission;

                (ii)    In their opinion, the financial statements and any
        supplementary financial information and schedules audited (and, if
        applicable, financial forecasts and/or pro forma financial information
        examined) by them and included or incorporated by reference in the
        Registration Statement or the Prospectus comply as to form in all
        material respects with the applicable accounting requirements of the Act
        or the Exchange Act, as applicable, and the related rules and
        regulations; and, if applicable, they have made a review in accordance
        with standards established by the American Institute of Certified Public
        Accountants of the consolidated interim financial statements, selected
        financial data, pro forma financial information, financial forecasts
        and/or condensed financial statements derived from audited financial
        statements of the Company for the periods specified in such letter, as
        indicated in their reports thereon, copies of which have been
        [SEPARATELY] furnished to the representative or representatives of the
        Underwriters (the "Representatives") such term to include an Underwriter
        or Underwriters who act without any firm being designated as its or
        their representatives [AND ARE ATTACHED TO SUCH LETTERS];

                (iii)   They have made a review in accordance with standards
        established by the American Institute of Certified Public Accountants of
        the unaudited condensed consolidated statements of income, consolidated
        balance sheets and consolidated statements of cash flows included in the
        Prospectus and/or included in the Company's quarterly report on Form
        10-Q incorporated by reference into the Prospectus as indicated in their
        reports thereon copies of which [HAVE BEEN SEPARATELY FURNISHED TO THE
        REPRESENTATIVES][ARE ATTACHED TO SUCH LETTERS]; and on the basis of
        specified procedures including inquiries of officials of the Company who
        have responsibility for financial and accounting matters regarding
        whether the unaudited condensed consolidated financial statements
        referred to in paragraph (vi)(A)(i) below comply as to form in all
        material respects with the applicable accounting requirements of the Act
        and the Exchange Act and the related rules and regulations, nothing came
        to their attention that caused them to believe that the unaudited
        condensed consolidated financial statements do not comply as to form in
        all material respects with the applicable accounting requirements of the
        Act and the Exchange Act and the related rules and regulations adopted
        by the Commission;

                (iv)    The unaudited selected financial information with
        respect to the consolidated results of operations and financial position
        of the Company for the five most recent fiscal years included in the
        Prospectus and included or incorporated by reference in Item 6 of the
        Company's Annual Report on Form 10-K for the most recent fiscal year
        agrees with the corresponding amounts (after restatement where
        applicable) in the audited consolidated financial statements for five
        such fiscal years included or


<PAGE>   27
        incorporated by reference in the Company's Annual Reports on Form 10-K
        for such fiscal years;

                (v)     They have compared the information in the Prospectus
        under selected captions with the disclosure requirements of Regulation
        S-K and on the basis of limited procedures specified in such letter
        nothing came to their attention as a result of the foregoing procedures
        that caused them to believe that this information does not conform in
        all material respects with the disclosure requirements of Items 301,
        302, 402 and 503(d), respectively, of Regulation S-K;

                (vi)    On the basis of limited procedures, not constituting an
        examination 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 or incorporated by
        reference in the Prospectus, 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)     (i) the unaudited condensed consolidated
                statements of income, consolidated balance sheets and
                consolidated statements of cash flows included in the Prospectus
                and/or included or incorporated by reference in the Company's
                Quarterly Reports on Form 10-Q incorporated by reference in the
                Prospectus do not comply as to form in all material respects
                with the applicable accounting requirements of the Exchange Act
                and the published rules and regulations adopted by the
                Commission, or (ii) any material modifications should be made to
                the unaudited condensed consolidated statements of income,
                consolidated balance sheets and consolidated statements of cash
                flows included in the Prospectus or included in the Company's
                Quarterly Reports on Form 10-Q incorporated by reference in the
                Prospectus for them to be in conformity with generally accepted
                accounting principles;

                        (B)     any other unaudited income statement data and
                balance sheet items included in the Prospectus 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 or incorporated by reference in the Company's Annual
                Report on Form 10-K for the most recent fiscal year;

                        (C)     the unaudited financial statements which were
                not included in the Prospectus but from which were derived the
                unaudited condensed financial statements referred to in clause
                (A) and any unaudited income statement data and balance sheet
                items included in the Prospectus and referred to in clause (B)
                were not determined on a basis substantially consistent with the
                basis for the audited financial statements included or
                incorporated by reference in the Company's Annual Report on Form
                10-K for the most recent fiscal year;


<PAGE>   28
                        (D)     any unaudited pro forma consolidated condensed
                financial statements included or incorporated by reference in
                the Prospectus do not comply as to form in all material respects
                with the applicable accounting requirements of the Act and the
                rules and regulations adopted by the Commission thereunder or
                the pro forma adjustments have not been properly applied to the
                historical amounts in the compilation of those statements;

                        (E)     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 issuances of capital
                stock upon exercise of options and stock appreciation rights,
                upon earn-outs of performance shares and upon conversions of
                convertible securities, in each case which were outstanding on
                the date of the latest balance sheet included or incorporated by
                reference in the Prospectus) or any increase in the consolidated
                long-term debt of the Company and its subsidiaries, or any
                decreases in consolidated net current assets or stockholders'
                equity or other items specified by the Representatives, or any
                increases in any items specified by the Representatives, in each
                case as compared with amounts shown in the latest balance sheet
                included or incorporated by reference in the Prospectus, except
                in each case for changes, increases or decreases which the
                Prospectus discloses have occurred or may occur or which are
                described in such letter; and

                        (F)     for the period from the date of the latest
                financial statements included or incorporated by reference in
                the Prospectus to the specified date referred to in clause (E)
                there were any decreases in consolidated net revenues or
                operating profit or the total or per share amounts of
                consolidated net income or other items specified by the
                Representatives, or any increases in any items specified by the
                Representatives, in each case as compared with the comparable
                period of the preceding year and with any other period of
                corresponding length specified by the Representatives, except in
                each case for increases or decreases which the Prospectus
                discloses have occurred or may occur or which are described in
                such letter; and

                (vii)   In addition to the audit referred to in their report(s)
        included or incorporated by reference in the Prospectus and the limited
        procedures, inspection of minute books, inquiries and other procedures
        referred to in paragraphs (iii) and (vi) 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
        Representatives which are derived from the general accounting records of
        the Company and its subsidiaries, which appear in the Prospectus
        (excluding documents incorporated by reference), or in Part II of, or in
        exhibits and schedules to, the Registration Statement specified by the
        Representatives or in documents incorporated by reference in the
        Prospectus specified by the Representatives, 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.

        All references in this Annex II to the Prospectus shall be deemed to
refer to the Prospectus (including the documents incorporated by reference
therein) as defined in the


<PAGE>   29
Underwriting Agreement as of the date of the letter delivered on the date of the
Pricing Agreement for purposes of such letter and to the Prospectus as amended
or supplemented (including the documents incorporated by reference therein) in
relation to the applicable Designated Securities for purposes of the letter
delivered at the Time of Delivery for such Designated Securities.


<PAGE>   1
                                                                     Exhibit 4.1

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

                             Sun Microsystems, Inc.

                                       TO

                              The Bank of New York


                                   as Trustee


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


                                    Indenture

                           Dated as of August 1, 1999


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




                             Senior Debt Securities

================================================================================
<PAGE>   2
                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                                                    PAGE
                                                                                                                    ----

<S>                                                                                                                 <C>
RECITALS OF THE COMPANY................................................................................................1

ARTICLE ONE  DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION...................................................1
     SECTION 101. Definitions..........................................................................................1
         Act ..........................................................................................................2
         Affiliate.....................................................................................................2
         Attributable Debt.............................................................................................2
         Authenticating Agent..........................................................................................2
         Board of Directors............................................................................................2
         Board Resolution..............................................................................................2
         Business Day..................................................................................................2
         Commission....................................................................................................3
         Common Stock..................................................................................................3
         Company.......................................................................................................3
         Company Request...............................................................................................3
         Company Order.................................................................................................3
         Consolidated Net Tangible Assets..............................................................................3
         Corporate Trust Office........................................................................................3
         Corporation...................................................................................................3
         Covenant Defeasance...........................................................................................3
         Defaulted Interest............................................................................................3
         Defeasance....................................................................................................4
         Depositary....................................................................................................4
         Event of Default..............................................................................................4
         Exchange Act..................................................................................................4
         Expiration Date...............................................................................................4
         Global Security...............................................................................................4
         Holder........................................................................................................4
         Indenture.....................................................................................................4
         Interest Payment Date.........................................................................................5
         Investment Company Act........................................................................................5
         Maturity......................................................................................................5
         Nonrecourse Obligation........................................................................................5
         Notice of Default.............................................................................................5
         Officers' Certificate.........................................................................................5
         Opinion of Counsel............................................................................................5
         Original Issue Discount Security..............................................................................5
         Outstanding...................................................................................................5
         Paying Agent..................................................................................................6
         Person........................................................................................................6
         Place of Payment..............................................................................................6
         Predecessor Security..........................................................................................7

                                                          -i-
</TABLE>

<PAGE>   3


                                TABLE OF CONTENTS
                                   (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                                     PAGE
                                                                                                                     ----

<S>                                                                                                                  <C>
         Principal Property............................................................................................7
         Record Date...................................................................................................7
         Redemption Date...............................................................................................7
         Redemption Price..............................................................................................7
         Regular Record Date...........................................................................................7
         Restricted Subsidiary.........................................................................................7
         Sale and Leaseback Transaction................................................................................7
         Securities....................................................................................................7
         Securities Act................................................................................................7
         Security Register.............................................................................................8
         Security Registrar............................................................................................8
         Special Record Date...........................................................................................8
         Stated Maturity...............................................................................................8
         Subsidiary....................................................................................................8
         Trust Indenture Act...........................................................................................8
         Trustee.......................................................................................................8
         U.S. Government Obligation....................................................................................8
         Vice President................................................................................................8
     SECTION 102.  Compliance Certificates and Opinions................................................................8
     SECTION 103.  Form of Documents Delivered to Trustee..............................................................9
     SECTION 104.  Acts of Holders; Record Dates.......................................................................9
     SECTION 105.  Notices, Etc., to Trustee and Company..............................................................11
     SECTION 106.  Notice to Holders; Waiver..........................................................................12
     SECTION 107.  Conflict with Trust Indenture Act..................................................................12
     SECTION 108.  Effect of Headings and Table of Contents...........................................................12
     SECTION 109.  Successors and Assigns.............................................................................13
     SECTION 110.  Separability Clause................................................................................13
     SECTION 111.  Benefits of Indenture..............................................................................13
     SECTION 112.  Governing Law......................................................................................13
     SECTION 113.  Legal Holidays.....................................................................................13
     SECTION 114.  Indenture and Securities Solely Corporate Obligations..............................................13
     SECTION 115.  Indenture May Be Executed in Counterparts..........................................................14

ARTICLE TWO  SECURITY FORMS...........................................................................................14
     SECTION 201.  Forms Generally....................................................................................14
     SECTION 202.  Form of Face of Security...........................................................................15
     SECTION 203.  Form of Reverse of Security........................................................................16
     SECTION 204.  Form of Legend for Global Securities...............................................................21
     SECTION 205.  Form of Trustee's Certificate of Authentication....................................................21
     SECTION 206.  Form of Conversion Notice..........................................................................22

                                                            ii

</TABLE>


<PAGE>   4
                                TABLE OF CONTENTS
                                   (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                                     PAGE
                                                                                                                     ----

<S>                                                                                                                  <C>
ARTICLE THREE  THE SECURITIES.........................................................................................23
     SECTION 301.        Amount Unlimited; Issuable in Series.........................................................23
     SECTION 302.        Denominations................................................................................26
     SECTION 303.        Execution, Authentication, Delivery and Dating...............................................26
     SECTION 304.        Temporary Securities.........................................................................27
     SECTION 305.        Registration; Registration of Transfer and Exchange..........................................28
     SECTION 306.        Mutilated, Destroyed, Lost and Stolen Securities.............................................29
     SECTION 307.        Payment of Interest; Interest Rights Preserved...............................................30
     SECTION 308.        Persons Deemed Owners........................................................................31
     SECTION 309.        Cancellation.................................................................................31
     SECTION 310.        Computation of Interest......................................................................32
     SECTION 311.        CUSIP Numbers................................................................................32

ARTICLE FOUR  SATISFACTION AND DISCHARGE..............................................................................32
     SECTION 401.        Satisfaction and Discharge of Indenture......................................................32
     SECTION 402.        Application of Trust Money...................................................................33

ARTICLE FIVE  REMEDIES................................................................................................34
     SECTION 501.        Events of Default............................................................................34
     SECTION 502.        Acceleration of Maturity; Rescission and Annulment...........................................35
     SECTION 503.        Collection of Indebtedness and Suits for Enforcement by Trustee..............................36
     SECTION 504.        Trustee May File Proofs of Claim.............................................................36
     SECTION 505.        Trustee May Enforce Claims Without Possession of Securities..................................37
     SECTION 506.        Application of Money Collected...............................................................37
     SECTION 507.        Limitation on Suits..........................................................................37
     SECTION 508.        Unconditional Right of Holders to Receive Principal, Premium and Interest and
         to Convert...................................................................................................38
     SECTION 509.        Restoration of Rights and Remedies...........................................................38
     SECTION 510.        Rights and Remedies Cumulative...............................................................38
     SECTION 511.        Delay or Omission Not Waiver.................................................................39
     SECTION 512.        Control by Holders...........................................................................39
     SECTION 513.        Waiver of Past Defaults......................................................................39
     SECTION 514.        Undertaking for Costs........................................................................40
     SECTION 515.        Waiver of Usury, Stay or Extension Laws......................................................40

ARTICLE SIX  THE TRUSTEE..............................................................................................40
     SECTION 601.        Certain Duties and Responsibilities..........................................................40
     SECTION 602.        Notice of Defaults...........................................................................40
     SECTION 603.        Certain Rights of Trustee....................................................................41
     SECTION 604.        Not Responsible for Recitals or Issuance of Securities.......................................42
     SECTION 605.        May Hold Securities and Act as Trustee Under Other Indentures................................42

                                                         -iii-
</TABLE>

<PAGE>   5
                                TABLE OF CONTENTS
                                   (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                                     PAGE
                                                                                                                     ----

<S>                      <C>                                                                                         <C>
     SECTION 606.        Money Held in Trust..........................................................................42
     SECTION 607.        Compensation and Reimbursement...............................................................43
     SECTION 608.        Conflicting Interests........................................................................43
     SECTION 609.        Corporate Trustee Required; Eligibility......................................................43
     SECTION 610.        Resignation and Removal; Appointment of Successor............................................44
     SECTION 611.        Acceptance of Appointment by Successor.......................................................45
     SECTION 612.        Merger, Conversion, Consolidation or Succession to Business..................................46
     SECTION 613.        Preferential Collection of Claims Against Company............................................46
     SECTION 614.        Appointment of Authenticating Agent..........................................................46

ARTICLE SEVEN   HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY.....................................................48
     SECTION 701.        Company to Furnish Trustee Names and Addresses of Holders....................................48
     SECTION 702.        Preservation of Information; Communications to Holders.......................................48
     SECTION 703.        Reports by Trustee...........................................................................49
     SECTION 704.        Reports by Company...........................................................................49

ARTICLE EIGHT  CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE...................................................49
     SECTION 801.        Company May Consolidate, Etc., Only on Certain Terms.........................................49
     SECTION 802.        Successor Substituted........................................................................50

ARTICLE NINE  SUPPLEMENTAL INDENTURES.................................................................................51
     SECTION 901.        Supplemental Indentures Without Consent of Holders...........................................51
     SECTION 902.        Supplemental Indentures With Consent of Holders..............................................52
     SECTION 903.        Execution of Supplemental Indentures.........................................................53
     SECTION 904.        Effect of Supplemental Indentures............................................................53
     SECTION 905.        Conformity with Trust Indenture Act..........................................................53
     SECTION 906.        Reference in Securities to Supplemental Indentures...........................................54

ARTICLE TEN  COVENANTS................................................................................................54
     SECTION 1001.       Payment of Principal, Premium and Interest...................................................54
     SECTION 1002.       Maintenance of Office or Agency..............................................................54
     SECTION 1003.       Money for Securities Payments to Be Held in Trust............................................55
     SECTION 1004.       Statement by Officers as to Default..........................................................56
     SECTION 1005.       Existence....................................................................................56
     SECTION 1006.       Maintenance of Properties....................................................................56
     SECTION 1007.       Payment of Taxes and Other Claims............................................................56
     SECTION 1008.       Limitation on Liens..........................................................................57
     SECTION 1009.       Limitations on Sale and Leaseback Transactions...............................................58
     SECTION 1010.       Waiver of Certain Covenants..................................................................59
     SECTION 1011.       Calculation of Original Issue Discount.......................................................59


                                                          -iv-
</TABLE>

<PAGE>   6

<TABLE>
<CAPTION>

                                                                                                                     PAGE
                                                                                                                     ----

<S>                      <C>                                                                                         <C>
ARTICLE ELEVEN  REDEMPTION OF SECURITIES..............................................................................59
     SECTION 1101.       Applicability of Article.....................................................................59
     SECTION 1102.       Election to Redeem; Notice to Trustee........................................................60
     SECTION 1103.       Selection by Trustee of Securities to Be Redeemed............................................60
     SECTION 1104.       Notice of Redemption.........................................................................61
     SECTION 1105.       Deposit of Redemption Price..................................................................62
     SECTION 1106.       Securities Payable on Redemption Date........................................................62
     SECTION 1107.       Securities Redeemed in Part..................................................................62

ARTICLE TWELVE  SINKING FUNDS.........................................................................................63
     SECTION 1201.       Applicability of Article.....................................................................63
     SECTION 1202.       Satisfaction of Sinking Fund Payments with Securities........................................63
     SECTION 1203.       Redemption of Securities for Sinking Fund....................................................63

ARTICLE THIRTEEN  DEFEASANCE AND COVENANT DEFEASANCE..................................................................64
     SECTION 1301.       Company's Option to Effect Defeasance or Covenant Defeasance.................................64
     SECTION 1302.       Defeasance and Discharge.....................................................................64
     SECTION 1303.       Covenant Defeasance..........................................................................64
     SECTION 1304.       Conditions to Defeasance or Covenant Defeasance..............................................65
     SECTION 1305.       Deposited Money and U.S. Government Obligations to Be Held in Trust;
                         Miscellaneous Provisions.....................................................................66
     SECTION 1306.       Reinstatement................................................................................67

ARTICLE FOURTEEN  CONVERSION AND EXCHANGE OF SECURITIES...............................................................67
     SECTION 1401.       Applicability of Article.....................................................................67
     SECTION 1402.       Exercise of Conversion and Exchange Privilege................................................68
     SECTION 1403.       No Fractional Shares.........................................................................69
     SECTION 1404.       Adjustment of Conversion and Exchange Price..................................................69
     SECTION 1405.       Notice of Certain Corporate Actions..........................................................70
     SECTION 1406.       Reservation of Shares of Common Stock........................................................71
     SECTION 1407.       Payment of Certain Taxes Upon Conversion and Exchange........................................71
     SECTION 1408.       Nonassessability.............................................................................71
     SECTION 1409.       Provision in Case of Consolidation, Merger or Sale of Assets.................................71
     SECTION 1410.       Duties of Trustee Regarding Conversion and Exchange..........................................72
     SECTION 1411.       Repayment of Certain Funds Upon Conversion and Exchange......................................73


                                                          -v-
</TABLE>

<PAGE>   7
                             SUN MICROSYSTEMS, INC.

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


<TABLE>
<CAPTION>

    Trust Indenture                                             Indenture
      Act Section                                                Section
  ------------------                                         ---------------
<S>                                                          <C>
   Section 310(a)(1)   ......................................609
           (a)(2)      ......................................609
           (a)(3)      ......................................Not Applicable
           (a)(4)      ......................................Not Applicable
           (b)         ......................................608, 610
   Section 311(a)      ......................................613
           (b)         ......................................613
   Section 312(a)      ......................................701, 702
           (b)         ......................................702
           (c)         ......................................702
   Section 313(a)      ......................................703
           (b)         ......................................703
           (c)         ......................................703
           (d)         ......................................703
   Section 314(a)      ......................................704
           (a)(4)      ......................................101, 1004
           (b)         ......................................Not Applicable
           (c)(1)      ......................................102
           (c)(2)      ......................................102
           (c)(3)      ......................................Not Applicable
           (d)         ......................................Not Applicable
           (e)         ......................................102
   Section 315(a)      ......................................601
           (b)         ......................................602
           (c)         ......................................601
           (d)         ......................................601
           (e)         ......................................514
   Section 316(a)      ......................................101
           (a)(1)(A)   ......................................502, 512
           (a)(1)(B)   ......................................513
           (a)(2)      ......................................Not Applicable
           (b)         ......................................508
           (c)         ......................................104
   Section 317(a)(1)   ......................................503
           (a)(2)      ......................................504
           (b)         ......................................1003
   Section 318(a)      ......................................107

- ---------------------------
</TABLE>

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


<PAGE>   8

         INDENTURE, dated as of August 1, 1999, between Sun Microsystems, Inc.,
a corporation duly organized and existing under the laws of the State of
Delaware (herein called the "Company"), having its principal executive office at
901 San Antonio Road, Palo Alto, California 94303, and The Bank of New York, a
New York banking corporation, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

         The Company has duly authorized the execution and delivery of this
Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called the
"Securities"), to be issued in one or more series as provided in this Indenture.

         All things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, have been done.

                   NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.      DEFINITIONS.

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

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

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

         (3) all accounting terms not otherwise defined herein have the meanings
assigned to them in accordance with generally accepted accounting principles,
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;

         (4) unless the context otherwise requires, any reference to an
"Article" or a "Section" refers to an Article or a Section, as the case may be,
of this Indenture; and


<PAGE>   9
         (5) 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, has the meaning specified
in Section 104.

         "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.

         "Attributable Debt" means, in respect of a Sale and Lease-Back
Transaction involving a Principal Property, at the time of determination, the
lesser of: (a) the fair value of such property (as determined in good faith by
the Board of Directors); or (b) the present value of the total net amount of
rent required to be paid under such lease during the remaining term thereof
(including any renewal term or period for which such lease has been extended),
discounted at the rate of interest set forth or implicit in the terms of such
lease or, if not practicable to determine such rate, the weighted average
interest rate per annum (in the case of Original Issue Discount Securities, the
imputed interest rate) borne by the Securities of each series outstanding
pursuant to this Indenture compounded semi-annually. For purposes of the
foregoing definition, rent shall not include amounts required to be paid by the
lessee, whether or not designated as rent or additional rent, on account of or
contingent upon maintenance and repairs, insurance, taxes, assessments, water
rates and similar charges. In the case of any lease which is terminable by the
lessee upon the payment of a penalty, such net amount shall be the lesser of the
net amount determined assuming termination upon the first date such lease may be
terminated (in which case the net amount shall also include the amount of the
penalty, but no rent shall be considered as required to be paid under such lease
subsequent to the first date upon which it may be so terminated) and the net
amount determined assuming no such termination.

         "Authenticating Agent" means any Person authorized by the Trustee
pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities of one or more series.

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

         "Business Day," when used with respect to any Place of Payment, means
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which
banking institutions in that Place of Payment are authorized or obligated by law
or executive order to close.


                                       -2-

<PAGE>   10
         "Commission" means the Securities and Exchange Commission, from time to
time constituted, created under the Exchange Act, or, if at any time after the
execution of this instrument such Commission is not existing and performing the
duties now assigned to it under the Trust Indenture Act, then the body
performing such duties at such time.

         "Common Stock" includes any stock of any class of the Company 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 Company
and which is not subject to redemption by the Company; provided, however,
subject to the provisions of Section 1409, shares issuable upon conversion of
Securities shall include only shares of the class designated as Common Stock of
the Company at the date of this Indenture or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
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 Company
and which are not subject to redemption by the Company; provided, further that
if at any time there shall be more than one such resulting class, 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.

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

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

         "Consolidated Net Tangible Assets" means, as of the time of
determination, total assets (excluding applicable reserves) less: (a) total
current liabilities, except for (1) notes and loans payable, (2) current
maturities of long-term debt and (3) current maturities of obligations under
capital leases; and (b) certain intangible assets to the extent included in
total assets, all as set forth on the most recent consolidated balance sheet of
the Company and its consolidated subsidiaries and computed in accordance with
generally accepted accounting principles.

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

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

         "Covenant Defeasance" has the meaning specified in Section 1303.

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

                                       -3-

<PAGE>   11
         "Defeasance" has the meaning specified in Section 1302.

         "Depositary" means, with respect to Securities of any series issuable
in whole or in part in the form of one or more Global Securities, a clearing
agency registered under the Exchange Act that is designated to act as Depositary
for such Securities as contemplated by Section 301.

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

         "Exchange Act" means the Securities Exchange Act of 1934 and any
statute successor thereto, in each case as amended from time to time.

         "Expiration Date" has the meaning specified in Section 104.

         "Global Security" means a Security that evidences all or part of the
Securities of any series and bears the legend set forth in Section 204 (or such
legend as may be specified as contemplated by Section 301 for such Securities).

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

         "Indenture" means this instrument as originally executed and as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
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. The term "Indenture" shall also include the terms of particular
series of Securities established as contemplated by Section 301; provided,
however, that if at any time more than one Person is acting as Trustee under
this Indenture due to the appointment of one or more separate Trustees for any
one or more separate series of Securities, "Indenture" shall mean, with respect
to such series of Securities for which any such Person is Trustee, 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 and shall include the terms of particular
series of Securities for which such Person is Trustee established as
contemplated by Section 301, exclusive, however, of any provisions or terms
which relate solely to other series of Securities for which such Person is not
Trustee, regardless of when such terms or provisions were adopted, and exclusive
of any provisions or terms adopted by means of one or more indentures
supplemental hereto executed and delivered after such person had become such
Trustee, but to which such person, as such Trustee, was not a party; provided,
further that in the event that this Indenture is supplemented or amended by one
or more indentures supplemental hereto which are only applicable to certain
series of Securities, the term "Indenture" for a particular series of Securities
shall only include the supplemental indentures applicable thereto.

         "Interest," when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, means interest
payable after Maturity.


                                       -4-

<PAGE>   12
         "Interest Payment Date," when used with respect to any Security, means
the Stated Maturity of an instalment of interest on such Security.

         "Investment Company Act" means the Investment Company Act of 1940 and
any statute successor thereto, in each case as amended from time to time.

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

         "Nonrecourse Obligation" means indebtedness or other obligations
substantially related to (i) the acquisition of assets not previously owned by
the Company or any Restricted Subsidiary or (ii) the financing of a project
involving the development or expansion of properties of the Company or any
Restricted Subsidiary, as to which the obligee with respect to such indebtedness
or obligation has no recourse to the Company or any Restricted Subsidiary or any
assets of the Company or any Restricted Subsidiary other than the assets which
were acquired with the proceeds of such transaction or the project financed with
the proceeds of such transaction (and the proceeds thereof).

         "Notice of Default" means a written notice of the kind specified in
Section 501(4).

         "Officers' Certificate" means a certificate signed by (a) the Chairman
of the Board, a Vice Chairman of the Board, the President or a Vice President,
and (b) by the principal financial officer, the Treasurer, an Assistant
Treasurer, the Secretary or an Assistant Secretary, of the Company, and
delivered to the Trustee. One of the officers signing an Officers' Certificate
given pursuant to Section 1004 shall be the principal executive, financial or
accounting officer of the Company.

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

         "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

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

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

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

                                       -5-

<PAGE>   13
redemption has been duly given pursuant to this Indenture or provision therefor
satisfactory to the Trustee has been made;

         (3) Securities as to which Defeasance has been effected pursuant to
Section 1302; and

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

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given, made or taken any
request, demand, authorization, direction, notice, consent, waiver or other
action hereunder as of any date, (A) the principal amount of an Original Issue
Discount Security which shall be deemed to be Outstanding shall be the amount of
the principal thereof which would be due and payable as of such date upon
acceleration of the Maturity thereof to such date pursuant to Section 502, (B)
if, as of such date, the principal amount payable at the Stated Maturity of a
Security is not determinable, the principal amount of such Security which shall
be deemed to be Outstanding shall be the amount as specified or determined as
contemplated by Section 301, (C) the principal amount of a Security denominated
in one or more foreign currencies or currency units which shall be deemed to be
Outstanding shall be the U.S. dollar equivalent, determined as of such date in
the manner provided as contemplated by Section 301, of the principal amount of
such Security (or, in the case of a Security described in Clause (A) or (B)
above, of the amount determined as provided in such Clause), and (D) Securities
owned by the Company or any other obligor upon the Securities or any Affiliate
of the Company or of such other obligor shall be disregarded and deemed not to
be Outstanding, except that, in determining whether the Trustee shall be
protected in relying upon any such request, demand, authorization, direction,
notice, consent, waiver or other action, 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 of such other obligor.

         "Paying Agent" means any Person authorized by the Company to pay the
principal of or any premium or interest on any Securities on behalf of the
Company.

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

         "Place of Payment," when used with respect to the Securities of any
series, means the place or places where the principal of and any premium and
interest on the Securities of that series are payable as specified as
contemplated by Section 301.


                                       -6-

<PAGE>   14
         "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for 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.

         "Principal Property" means the land, land improvements, buildings and
fixtures (to the extent they constitute real property interests, including any
leasehold interest therein) constituting the principal corporate office, any
manufacturing plant or any manufacturing facility (whether now owned or
hereafter acquired) which: (a) is owned by the Company or any Subsidiary; (b) is
located within any of the present 50 states of the United States of America (or
the District of Columbia); (c) has not been determined in good faith by the
Board of Directors not to be materially important to the total business
conducted by the Company and its Subsidiaries taken as a whole; and (d) has a
book value on the date as of which the determination is being made in excess of
0.75% of Consolidated Net Tangible Assets of the Company as most recently
determined on or prior to such date.

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

         "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.

         "Regular Record Date" for the interest payable on any Interest Payment
Date on the Securities of any series means the date specified for that purpose
as contemplated by Section 301.

         "Restricted Subsidiary" means any Subsidiary which owns any Principal
Property; provided, however, that the term "Restricted Subsidiary" shall not
include (a) any Subsidiary which is principally engaged in financing
receivables, or which is principally engaged in financing the Company's
operations outside the United States of America; or (b) any Subsidiary less than
80% of the 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 if the Common Stock of such Subsidiary is traded on any
national securities exchange or quoted on the Nasdaq National Market or in the
over-the-counter market.

         "Sale and Leaseback Transaction" means any arrangement with any person
providing for the leasing by the Company or any Restricted Subsidiary of any
Principal Property which property has been or is to be sold or transferred by
the Company or such Restricted Subsidiary to such person.

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

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

                                       -7-

<PAGE>   15
         "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

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

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

         "Subsidiary" means a corporation of which at least 66 2/3% of the
outstanding voting stock of such corporation is at the time owned, directly or
indirectly, by the Company or by one or more other Subsidiaries, or by the
Company and one or more other Subsidiaries, and the accounts of which are
consolidated with those of the Company in its most recent consolidated financial
statements in accordance with generally accepted accounting principals. For the
purposes of this definition, "voting stock" means stock which ordinarily has
voting power for the election of directors, whether at all times or only so long
as no senior class of stock has such voting power by reason of any contingency.

         "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 or include each Person who is then a Trustee hereunder, and
if at any time there is more than one such Person, "Trustee" as used with
respect to the Securities of any series shall mean the Trustee with respect to
Securities of that series.

         "U.S. Government Obligation" has the meaning specified in Section 1304.

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

SECTION 102.      COMPLIANCE CERTIFICATES AND OPINIONS.

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


                                       -8-

<PAGE>   16
         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include,

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

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

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

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

SECTION 103.      FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

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

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

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

SECTION 104.      ACTS OF HOLDERS; RECORD DATES.

         Any request, demand, authorization, direction, notice, consent, waiver
or other action provided or permitted by this Indenture to be given, made or
taken by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agent

                                       -9-

<PAGE>   17
duly appointed in writing; and, except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments are
delivered to the Trustee and, where it is hereby expressly required, to the
Company. The Trustee shall promptly deliver to the Company copies of all such
instrument or instruments and records delivered to the Trustee. Such instrument
or instruments (and the action embodied therein and evidenced thereby) are
herein sometimes referred to as the "Act" of the Holders signing such instrument
or instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose of this Indenture
and (subject to Section 601) conclusive in favor of the Trustee and the Company,
if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing 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 or her the execution thereof. Where such
execution is by a signer acting in a capacity other than his or her individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his or her authority. The fact and date of the execution of any such
instrument or writing, or the authority of the Person executing the same, may
also be proved in any other manner which the Trustee deems sufficient.

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

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

         The Company may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities of any series entitled to
give, make or take any request, demand, authorization, direction, vote, notice,
consent, waiver or other action provided or permitted by this Indenture to be
given, made or taken by Holders of Securities of such series, provided that the
Company may not set a record date for, and the provisions of this paragraph
shall not apply with respect to, the giving or making of any notice,
declaration, request or direction referred to in the next paragraph. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities of the relevant series on such record date, and no other Holders,
shall be entitled to take the relevant action, whether or not such Holders
remain Holders after such record date; provided that no such action shall be
effective hereunder unless taken on or prior to the applicable Expiration Date
by Holders of the requisite principal amount of Outstanding Securities of such
series on such record date. Nothing in this paragraph shall be construed to
prevent the Company from setting a new record date for any action for which a
record date has previously been set pursuant to this paragraph (whereupon the
record date previously set shall automatically and with no action by any Person
be canceled and of no effect), and nothing in this paragraph shall be construed
to render ineffective any action taken by Holders of the requisite principal
amount of Outstanding Securities of the relevant series on the date such action
is taken. Promptly after any record date is set pursuant to this paragraph, the
Company, at its own expense, shall cause notice of

                                      -10-

<PAGE>   18
such record date, the proposed action by Holders and the applicable Expiration
Date to be given to the Trustee in writing and to each Holder of Securities of
the relevant series in the manner set forth in Section 106.

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

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

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

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

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


                                      -11-

<PAGE>   19
         (1) the Trustee by any Holder or by the Company shall be sufficient for
every purpose hereunder if made, given, furnished or filed in writing (or by
facsimile transmission ((212) 815-5915), provided that oral confirmation of
receipt shall have been received) to or with the Trustee at its Corporate Trust
Office, Attention: Corporate Trust Trustee Administration or

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

SECTION 106.      NOTICE TO HOLDERS; WAIVER.

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

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

SECTION 107.      CONFLICT WITH TRUST INDENTURE ACT.

         If any provision hereof limits, qualifies or conflicts with a provision
of the Trust Indenture Act which 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
which may be so modified or excluded, the latter provision shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.

SECTION 108.      EFFECT OF HEADINGS AND TABLE OF CONTENTS.

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


                                      -12-

<PAGE>   20
SECTION 109.      SUCCESSORS AND ASSIGNS.

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

SECTION 110.      SEPARABILITY CLAUSE.

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

SECTION 111.      BENEFITS OF INDENTURE.

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

SECTION 112.      GOVERNING LAW.

         THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS OF
LAWS PRINCIPLES THEREOF.

SECTION 113.      LEGAL HOLIDAYS.

         In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security or the last date on which a Holder has the right to
convert a Security at a particular conversion price shall not be a Business Day
at any Place of Payment, then (notwithstanding any other provision of this
Indenture or of the Securities (other than a provision of any Security which
specifically states that such provision shall apply in lieu of this Section))
payment of interest or principal (and premium, if any) or, if applicable to a
particular series of Securities, conversion need not be made at such Place of
Payment on such date, but may be made on the next succeeding Business Day at
such Place of Payment with the same force and effect as if made on the Interest
Payment Date or Redemption Date, at the Stated Maturity or on such last day for
conversion, as the case may be.

SECTION 114.      INDENTURE AND SECURITIES SOLELY CORPORATE OBLIGATIONS.

         No recourse for the payment of the principal of or premium, if any, or
interest on any Security, or for any claim based thereon or otherwise in respect
thereof, and no recourse under or upon any obligation, covenant or agreement of
the Company in this Indenture or in any supplemental indenture or in any
Security, or because of the creation of any indebtedness represented thereby,
shall be had against any incorporator, stockholder, employee, agent, officer, or
director or subsidiary, as such, past, present or future, of the Company or of
any successor corporation, either directly or through the Company or any
successor corporation, whether by virtue of any constitution, statute or rule of
law, or by the

                                      -13-

<PAGE>   21
enforcement of any assessment or penalty or otherwise; it being expressly
understood that all such liability is hereby expressly waived and released as a
condition of, and as a consideration for, the execution of this Indenture and
the issue of the Securities.

SECTION 115.      INDENTURE MAY BE EXECUTED IN COUNTERPARTS.

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

                                   ARTICLE TWO

                                 SECURITY FORMS

SECTION 201.      FORMS GENERALLY.

         The Securities of each series shall be in substantially the form set
forth in this Article, or in such other form as shall be established by or
pursuant to a Board Resolution or in one or more indentures supplemental hereto,
in each case with such appropriate insertions, omissions, substitutions and
other variations as are required or permitted by this Indenture, and may have
such letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange or Depositary therefor or as may, consistently herewith, be
determined by the officers executing such Securities, as evidenced by their
execution thereof. If the form of Securities of any series is established by
action taken pursuant to a Board Resolution, a copy of an appropriate record of
such action shall be certified by the Secretary or an Assistant Secretary of the
Company and delivered to the Trustee at or prior to the delivery of the Company
Order contemplated by Section 303 for the authentication and delivery of such
Securities. Any such Board Resolution or record of such action shall have
attached thereto a true and correct copy of the form of Security referred to
therein approved by or pursuant to such Board Resolution.

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


                                      -14-

<PAGE>   22
SECTION 202.      FORM OF FACE OF SECURITY.

[INSERT ANY LEGEND REQUIRED BY THE INTERNAL REVENUE CODE AND THE REGULATIONS
THEREUNDER.]

                             SUN MICROSYSTEMS, INC.
              ----------------------------------------------------

No. ________________                                             $_____________
CUSIP No. __________

         Sun Microsystems, Inc., a corporation duly organized and existing under
the laws of Delaware (herein called the "Company," which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to ____________, or registered assigns, the
principal sum of _____________ Dollars on _____________________________ [IF THE
SECURITY IS TO BEAR INTEREST PRIOR TO MATURITY, INSERT -- , and to pay interest
thereon from __________ or from the most recent Interest Payment Date to which
interest has been paid or duly provided for, semi-annually on ___________ and
__________ in each year, commencing _________, at the rate of ___% per annum,
until the principal hereof is paid or made available for payment [IF APPLICABLE,
INSERT -- , provided that any principal and premium, and any such instalment of
interest, which is overdue shall bear interest at the rate of ___% per annum (to
the extent that the payment of such interest shall be legally enforceable), from
the dates such amounts are due until they are paid or made available for
payment, and such interest shall be payable on demand]. The interest so payable,
and punctually paid or duly provided for, on any Interest Payment Date will, as
provided in such Indenture, be paid to the Person in whose name this Security
(or one or more Predecessor Securities) is registered at the close of business
on the Regular Record Date for such interest, which shall be the ______ or
______ (whether or not a Business Day), as the case may be, next preceding such
Interest Payment Date. Any such interest not so punctually paid or duly provided
for will forthwith cease to be payable to the Holder on such Regular Record Date
and may either be paid to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on a Special
Record Date for the payment of such Defaulted Interest to be fixed by the
Trustee, notice whereof shall be given to Holders of Securities of this series
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 of this series may be listed, and
upon such notice as may be required by such exchange, all as more fully provided
in said Indenture. Interest on the Security shall be computed on the basis of a
360-day year of twelve 30-day months.]

         [IF THE SECURITY IS NOT TO BEAR INTEREST PRIOR TO MATURITY, INSERT --
The principal of this Security shall not bear interest except in the case of a
default in payment of principal upon acceleration, upon redemption or at Stated
Maturity and in such case the overdue principal and any overdue premium shall
bear interest at the rate of ___% per annum (to the extent that the payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made available for payment. Interest on any overdue
principal or premium shall be payable on demand. [Any such interest on overdue
principal or premium which is not paid on demand shall bear interest at the rate
of ___% per annum (to the extent that the payment of such interest on interest
shall be legally enforceable), from the

                                      -15-

<PAGE>   23
date of such demand until the amount so demanded is paid or made available for
payment. Interest on any overdue interest shall be payable on demand.]]

         Payment of the principal of (and premium, if any) and [IF APPLICABLE,
INSERT -- any such] interest on this Security will be made at the office or
agency of the Company maintained for that purpose in _______, [IF APPLICABLE,
INSERT -- which shall initially be the [principal corporate trust] office of the
Trustee,] in such coin or currency of the United States of America as at the
time of payment is legal tender for payment of public and private debts [IF
APPLICABLE, INSERT -- ; provided, however, that at the option of the Company
payment of interest may be made by check mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register].

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

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

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

                                        SUN MICROSYSTEMS, INC.

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

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

SECTION 203.      FORM OF REVERSE OF SECURITY.

         This Security is one of a duly authorized issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series under an Indenture, dated as of August 1, 1999 (herein called the
"Indenture," which term shall have the meaning assigned to it in such
instrument), between the Company and The Bank of New York, as Trustee (herein
called the "Trustee," which term includes any successor trustee under the
Indenture), and reference is hereby made to the Indenture and all indentures
supplemental thereto for a statement of the respective rights, limitations of
rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Securities and of the terms upon which the Securities are, and
are to be, authenticated and delivered. This Security is one of the series
designated on the face hereof [IF APPLICABLE, INSERT -- , limited in aggregate
principal amount to $________].

         [IF APPLICABLE, INSERT -- The Securities of this series are subject to
redemption upon not less than [IF APPLICABLE, INSERT -- 30] days' notice by
mail,(1) on __________ in any year commencing with the year ________ and ending
with the year ________ through operation of the sinking fund for this series

                                      -16-

<PAGE>   24
at a Redemption Price equal to 100% of the principal amount, and (2)] at any
time [IF APPLICABLE, INSERT -- on or after __________, 19__], as a whole or in
part, at the election of the Company, at the following Redemption Prices
(expressed as percentages of the principal amount): If redeemed [IF APPLICABLE,
INSERT -- on or before __________, ___%, and if redeemed] during the 12-month
period beginning ____________ of the years indicated, and thereafter at a
Redemption Price equal to ___% of the principal amount, together in the case of
any such redemption [IF APPLICABLE, INSERT -- (whether through operation of the
sinking fund or otherwise)] with accrued interest to the Redemption Date, but
interest installments whose Stated Maturity is on or prior to such Redemption
Date will be payable to the Holders of such Securities, or one or more
Predecessor Securities, of record at the close of business on the relevant
Record Dates referred to on the face hereof, all as provided in the Indenture.]

<TABLE>
<CAPTION>

                        REDEMPTION                              REDEMPTION
       YEAR               PRICE                   YEAR             PRICE
       ----               -----                   ----             -----
<S>                     <C>                      <C>            <C>

</TABLE>


        [IF APPLICABLE, INSERT -- The Securities of this series are subject to
redemption upon not less than [if applicable, insert --- 30] days' notice by
mail, (1) on __________ in any year commencing with the year _____ and ending
with the year _____ through operation of the sinking fund for this series at the
Redemption Prices for redemption through operation of the sinking fund
(expressed as percentages of the principal amount) set forth in the table below,
and (2) at any time [IF APPLICABLE, INSERT -- on or after __________], as a
whole or in part, at the election of the Company, at the Redemption Prices for
redemption otherwise than through operation of the sinking fund (expressed as
percentages of the principal amount) set forth in the table below: If redeemed
during the 12-month period beginning __________ of the years indicated,


<TABLE>
<CAPTION>

                      REDEMPTION PRICE FOR            REDEMPTION PRICE FOR
                       REDEMPTION-THROUGH              REDEMPTION-OTHERWISE
                        OPERATION OF THE             THAN THROUGH OPERATION
       YEAR               SINKING FUND                  OF THE SINKING FUND
- -------------------  ---------------------            ----------------------
<S>                  <C>                             <C>
</TABLE>


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

        [IF APPLICABLE, INSERT -- Notwithstanding the foregoing, the Company may
not, prior to __________, redeem any Securities of this series as contemplated
by [IF APPLICABLE, INSERT -- Clause (2) of] the preceding paragraph as a part
of, or in anticipation of, any refunding operation by the application,

                                      -17-

<PAGE>   25
directly or indirectly, of moneys borrowed having an interest cost to the
Company (calculated in accordance with generally accepted financial practice) of
less than ___% per annum.]

        [IF APPLICABLE, INSERT -- The sinking fund for this series provides for
the redemption on __________ in each year beginning with the year ______ and
ending with the year ______ of [IF APPLICABLE, INSERT -- not less than $_______
("mandatory sinking fund") and not more than] $_______ aggregate principal
amount of Securities of this series. Securities of this series acquired or
redeemed by the Company otherwise than through [IF APPLICABLE, INSERT --
mandatory] sinking fund payments may be credited against subsequent [if
applicable, insert -- mandatory] sinking fund payments otherwise required to be
made [IF APPLICABLE, INSERT -- , in the inverse order in which they become
due].]

        [IF THE SECURITY IS SUBJECT TO REDEMPTION OF ANY KIND, INSERT -- In the
event of redemption of this Security in part only, a new Security or Securities
of this series and of like tenor for the unredeemed portion hereof will be
issued in the name of the Holder hereof upon the cancellation hereof.]

        [IF APPLICABLE, INSERT -- The Indenture contains provisions for
defeasance at any time of [the entire indebtedness of this Security] [or]
[certain restrictive covenants and Events of Default with respect to this
Security] [, in each case] upon compliance with certain conditions set forth in
the Indenture.]

        [IF THE SECURITY IS CONVERTIBLE INTO COMMON STOCK OF THE COMPANY, INSERT
- -- Subject to the provisions of the Indenture, the Holder of this Security is
entitled, at its option, at any time on or prior to Maturity (except that, in
case this Security or any portion hereof shall be called for redemption, such
right shall terminate with respect to this Security or portion hereof, as the
case may be, so called for redemption at the close of business on the first
Business Day next preceding the date fixed for redemption as provided in the
Indenture unless the Company defaults in making the payment due upon
redemption), to convert the principal amount of this Security (or any portion
hereof which is $1,000 or an integral multiple thereof), into fully paid and
non-assessable shares (calculated as to each conversion to the nearest 1/100th
of a share) of the Common Stock of the Company, as said shares shall be
constituted at the date of conversion, at the conversion price of $______
principal amount of Securities for each share of Common Stock, or at the
adjusted conversion price in effect at the date of conversion determined as
provided in the Indenture, upon surrender of this Security, together with the
conversion notice hereon duly executed, to the Company at the designated office
or agency of the Company in __________, accompanied (if so required by the
Company) by instruments of transfer, in form satisfactory to the Company and to
the Trustee, duly executed by the Holder or by its duly authorized attorney in
writing. Such surrender shall, if made during any period beginning at the close
of business on a Regular Record Date and ending at the opening of business on
the Interest Payment Date next following such Regular Record Date (unless this
Security or the portion being converted shall have been called for redemption on
a Redemption Date during the period beginning at the close of business on a
Regular Record Date and ending at the opening of business on the first Business
Day after the next succeeding Interest Payment Date, or if such Interest Payment
Date is not a Business Day, the second such Business Day), also be accompanied
by payment in 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. Subject to the aforesaid requirement for payment and, in
the case of a conversion after the Regular Record Date next preceding any
Interest Payment Date and on or before such Interest Payment Date, to the right
of

                                      -18-

<PAGE>   26
the Holder of this Security (or any Predecessor Security) of record at such
Regular Record Date to receive an installment of interest (with certain
exceptions provided in the Indenture), no adjustment is to be made on conversion
for interest accrued hereon or for dividends on shares of Common Stock issued on
conversion. The Company is not required to issue fractional shares upon any such
conversion, but shall make adjustment therefor in cash on the basis of the
current market value of such fractional interest 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 sale of substantially all of the
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 the consolidation, merger or sale by a holder of the
number of shares of Common Stock into which this Security might have been
converted immediately prior to such consolidation, merger or sale (assuming such
holder of Common Stock 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). In the event of conversion of this Security in part only, a new
Security or Securities for the unconverted portion hereof shall be issued in the
name of the Holder hereof upon the cancellation hereof.]

        [IF THE SECURITY IS CONVERTIBLE INTO OTHER SECURITIES OF THE COMPANY,
SPECIFY THE CONVERSION FEATURES.]

        [IF THE SECURITY IS NOT AN ORIGINAL ISSUE DISCOUNT SECURITY, INSERT --
If an Event of Default with respect to Securities of this series shall occur and
be continuing, the principal of the Securities of this series may be declared
due and payable in the manner and with the effect provided in the Indenture.]

        [IF THE SECURITY IS AN ORIGINAL ISSUE DISCOUNT SECURITY, INSERT -- If an
Event of Default with respect to Securities of this series shall occur and be
continuing, an amount of principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the
Indenture. Such amount shall be equal to -- insert formula for determining the
amount. Upon payment (i) of the amount of principal so declared due and payable
and (ii) of interest on any overdue principal, premium and interest (in each
case to the extent that the payment of such interest shall be legally
enforceable), all of the Company's obligations in respect of the payment of the
principal of and premium and interest, if any, on the Securities of this series
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 of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of more than 50% in principal amount of the Securities at
the time Outstanding of each series to be affected. The Indenture also contains
provisions permitting the Holders of specified percentages in principal amount
of the Securities of each series at the time Outstanding, on behalf of the
Holders of all Securities of such series, to waive compliance by the Company
with certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer

                                      -19-

<PAGE>   27
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security.

        As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default with respect to the
Securities of this series, the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding 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
Securities of this series at the time 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 or any premium or interest hereon
on or after the respective due dates expressed herein.

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

        As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company in any place where the principal of and any
premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or its
attorney duly authorized in writing, and thereupon one or more new Securities of
this series and of like tenor, of authorized denominations and for the same
aggregate principal amount, will be issued to the designated transferee or
transferees.

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

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

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

                                      -20-

<PAGE>   28

        This Security shall be deemed to be a contract made under the laws of
the State of New York, and for all purposes shall be construed in accordance
with and governed by the laws of said State, without regard to conflict of laws
principles thereof.

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

SECTION 204.      FORM OF LEGEND FOR GLOBAL SECURITIES.

        Unless otherwise specified as contemplated by Section 301 for the
Securities evidenced thereby, every Global Security authenticated and delivered
hereunder shall bear a legend in substantially the following form:

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

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

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

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

Dated:

                                      THE BANK OF NEW YORK
                                      As Trustee


                                      By:
                                         ---------------------------------------
                                           Authorized Signatory


                                      -21-

<PAGE>   29



SECTION 206.      FORM OF CONVERSION NOTICE.

        Conversion notices shall be in substantially the following form:

        To Sun Microsystems, Inc.:

        The undersigned owner of this Security hereby irrevocably exercises the
option to convert this Security, or portion hereof (which is $[1,000] or an
integral multiple thereof) below designated, into shares of Common Stock of the
Company in accordance with the terms of the Indenture referred to in this
Security, and directs that the shares issuable and deliverable upon the
conversion, together with any check in payment for fractional shares and any
Securities representing any unconverted principal amount hereof, be issued and
delivered to the registered holder hereof unless a different name has been
indicated below. If this Notice is being delivered on a date after the close of
business on a Regular Record Date and prior to the opening of business on the
related Interest Payment Date (unless this Security or the portion thereof being
converted has been called for redemption on a Redemption Date during the period
beginning at the close of business on a Regular Record Date and ending at the
opening of business on the first Business Day after the next succeeding Interest
Payment Date, or if such Interest Payment Date is not a Business Day, the second
such Business Day), this Notice is accompanied by payment, in funds acceptable
to the Company, of an amount equal to the interest payable on such Interest
Payment Date of the principal of this Security to be converted. If shares are to
be issued in the name of a person other than the undersigned, the undersigned
will pay all transfer taxes payable with respect hereto. Any amount required to
be paid by the undersigned on account of interest accompanies this Security.


          PRINCIPAL AMOUNT TO BE CONVERTED
(IN AN INTEGRAL MULTIPLE OF $1,000, IF LESS THAN ALL)
                  U.S. $_________

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

                                    --------------------------------------------
                                    Signature(s) must be guaranteed if shares of
                                    Common Stock are to be delivered, or
                                    Securities to be issued, other than to and
                                    in the name of the registered owner.


                                    --------------------------------------------
                                    Signature Guaranty


                                      -22-

<PAGE>   30

         Fill in for registration of shares of Common Stock and Security if to
be issued otherwise than to the registered Holder.


<TABLE>

<S>                                                                <C>
- -------------------------------------------------                   ----------------------------------------------
(Name)                                                              Social Security or Other Taxpayer
                                                                    Identification Number

- -------------------------------------------------
(Address)


- -------------------------------------------------
Please print Name and Address
(including zip code number)
</TABLE>

[The above conversion notice is to be modified, as appropriate, for conversion
into other securities or property of the Company.]

                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.      AMOUNT UNLIMITED; ISSUABLE IN SERIES.

        The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is unlimited.

        The Securities may be issued in one or more series. There shall be
established in or pursuant to a Board Resolution and, subject to Section 303,
set forth, or determined in the manner provided, in an Officers' Certificate, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series,

        (1) the title of the Securities of the series (which shall distinguish
the Securities of the series from Securities of any other series);

        (2) any limit upon the aggregate principal amount of the Securities of
the series which may be authenticated and delivered under this Indenture (except
for Securities authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other Securities of the series pursuant to
Section 304, 305, 306, 906 or 1107 and except for any Securities which, pursuant
to Section 303, are deemed never to have been authenticated and delivered
hereunder);

        (3) the Person to whom any interest on a Security of the series shall be
payable, if other than 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;

        (4) the date or dates on which the principal of any Securities of the
series is payable;


                                      -23-

<PAGE>   31



        (5) the rate or rates at which any Securities of the series shall bear
interest, if any, the date or dates from which any such interest shall accrue,
the Interest Payment Dates on which any such interest shall be payable and the
Regular Record Date for any such interest payable on any Interest Payment Date;

        (6) the place or places where the principal of and any premium and
interest on any Securities of the series shall be payable;

        (7) the period or periods within which, the price or prices at which and
the terms and conditions upon which any Securities of the series may be
redeemed, in whole or in part, at the option of the Company and, if other than
by a Board Resolution, the manner in which any election by the Company to redeem
the Securities shall be evidenced;

        (8) the obligation, if any, of the Company to redeem or purchase any
Securities of the series pursuant to any sinking fund or analogous provisions or
at the option of the Holder thereof and the period or periods within which, the
price or prices at which and the terms and conditions upon which any Securities
of the series shall be redeemed or purchased, in whole or in part, pursuant to
such obligation;

        (9) if other than denominations of $1,000 and any integral multiple
thereof, the denominations in which any Securities of the series shall be
issuable;

        (10) if the amount of principal of or any premium or interest on any
Securities of the series may be determined with reference to an index or
pursuant to a formula, the manner in which such amounts shall be determined;

        (11) if other than the currency of the United States of America, the
currency, currencies or currency units in which the principal of or any premium
or interest on any Securities of the series shall be payable and the manner of
determining the equivalent thereof in the currency of the United States of
America for any purpose, including for purposes of the definition of
"Outstanding" in Section 101;

        (12) if the principal of or any premium or interest on any Securities of
the series is to be payable, at the election of the Company or the Holder
thereof, in one or more currencies or currency units other than that or those in
which such Securities are stated to be payable, the currency, currencies or
currency units in which the principal of or any premium or interest on such
Securities as to which such election is made shall be payable, the periods
within which and the terms and conditions upon which such election is to be made
and the amount so payable (or the manner in which such amount shall be
determined);

        (13) if other than the entire principal amount thereof, the portion of
the principal amount of any Securities of the series which shall be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502;

        (14) if the principal amount payable at the Stated Maturity of any
Securities of the series will not be determinable as of any one or more dates
prior to the Stated Maturity, the amount which shall be deemed to be the
principal amount of such Securities as of any such date for any purpose
thereunder or

                                      -24-

<PAGE>   32
hereunder, including the principal amount thereof which shall be due and payable
upon any Maturity other than the Stated Maturity or which shall be deemed to be
Outstanding as of any date prior to the Stated Maturity (or, in any such case,
the manner in which such amount deemed to be the principal amount shall be
determined);

        (15) if applicable, that the Securities of the series, in whole or any
specified part, shall be defeasible pursuant to Section 1302 or Section 1303 or
both such Sections and, if other than by a Board Resolution, the manner in which
any election by the Company to defease such Securities shall be evidenced;

        (16) if applicable, the terms of any right to convert Securities of the
series into, or exchange Securities for, shares of Common Stock of the Company
or other securities or property;

        (17) if applicable, that any Securities of the series shall be issuable
in whole or in part in the form of one or more Global Securities and, in such
case, the respective Depositaries for such Global Securities, the form of any
legend or legends which shall be borne by any such Global Security in addition
to or in lieu of that set forth in Section 204 and any circumstances in addition
to or in lieu of those set forth in Clause (2) of the last paragraph of Section
305 in which any such Global Security may be exchanged in whole or in part for
Securities registered, and any transfer of such Global Security in whole or in
part may be registered, in the name or names of Persons other than the
Depositary for such Global Security or a nominee thereof;

        (18) any addition to or change in the Events of Default which applies to
any Securities of the series and any change in the right of the Trustee or the
requisite Holders of such Securities to declare the principal amount thereof due
and payable pursuant to Section 502;

        (19) any addition to or change in the covenants set forth in Article Ten
which applies to Securities of the series; and

        (20) any other terms of the series (which terms shall not be
inconsistent with the provisions of this Indenture, except as permitted by
Section 901(5)).

        All Securities of any one series shall be substantially identical except
as to denomination and except as may otherwise be provided in or pursuant to the
Board Resolution referred to above and (subject to Section 303) set forth, or
determined in the manner provided, in the Officers' Certificate referred to
above or in any such indenture supplemental hereto.

        If any of the terms of the series are established by action taken
pursuant to a Board Resolution, a copy of an appropriate record of such action
shall be certified by the Secretary or an Assistant Secretary of the Company and
delivered to the Trustee at or prior to the delivery of the Officers'
Certificate setting forth the terms of the series.

                                      -25-

<PAGE>   33
SECTION 302.      DENOMINATIONS.

        The Securities of each series shall be issuable only in registered form
without coupons and only in such denominations as shall be specified as
contemplated by Section 301. In the absence of any such specified denomination
with respect to the Securities of any series, the Securities of such series
shall be issuable in denominations of $1,000 and any integral multiple thereof.

SECTION 303.      EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

        The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its principal financial
officer, its President or one of its Vice Presidents, attested by its Treasurer,
its Assistant Treasurer, Secretary or one of its Assistant Secretaries. The
signature of any of these officers on the Securities may be manual or facsimile.

        Securities bearing the manual or facsimile signatures of individuals who
were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to 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 of any series executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities, and the Trustee in accordance
with the Company Order shall authenticate and deliver such Securities. If the
form or terms of the Securities of the series have been established by or
pursuant to one or more Board Resolutions as permitted by Sections 201 and 301,
in authenticating such Securities, and accepting the additional responsibilities
under this Indenture in relation to such Securities, the Trustee shall be
entitled to receive, and (subject to Section 601) shall be fully protected in
relying upon, a copy of such Board Resolution, the Officers' Certificate setting
forth the terms of the series and an Opinion of Counsel, with such Opinion of
Counsel stating,

        (1) if the form of such Securities has been established by or pursuant
to Board Resolution as permitted by Section 201, that such form has been
established in conformity with the provisions of this Indenture;

        (2) if the terms of such Securities have been established by or pursuant
to Board Resolution as permitted by Section 301, that such terms have been
established in conformity with the provisions of this Indenture; and

        (3) that such Securities, when authenticated and delivered by the
Trustee and issued by the Company in the manner and subject to any conditions
specified in such Opinion of Counsel, will constitute valid and legally binding
obligations of the Company enforceable in accordance with their terms, subject
to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles.


                                      -26-

<PAGE>   34
        If such form or terms have been so established, the Trustee shall not be
required to authenticate such Securities if the issue of such Securities
pursuant to this Indenture will affect the Trustee's own rights, duties or
immunities under the Securities and this Indenture or otherwise in a manner
which is not reasonably acceptable to the Trustee.

        Notwithstanding the provisions of Section 301 and of the preceding
paragraph, if all Securities of a series are not to be originally issued at one
time, it shall not be necessary to deliver the Officers' Certificate otherwise
required pursuant to Section 301 or the Company Order and Opinion of Counsel
otherwise required pursuant to such preceding paragraph at or prior to the
authentication of each Security of such series if such documents are delivered
at or prior to the authentication upon original issuance of the first Security
of such series to be issued.

        Each Security shall be dated the date of its authentication.

        No Security shall be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder. Notwithstanding the
foregoing, if any Security shall have been authenticated and delivered hereunder
but never issued and sold by the Company, and the Company shall deliver such
Security to the Trustee for cancellation as provided in Section 309, for all
purposes of this Indenture such Security shall be deemed never to have been
authenticated and delivered hereunder and shall never be entitled to the
benefits of this Indenture.

SECTION 304.      TEMPORARY SECURITIES.

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

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


                                      -27-

<PAGE>   35
SECTION 305.      REGISTRATION; REGISTRATION OF TRANSFER AND EXCHANGE.

        The Company shall cause to be kept at the Corporate Trust Office of the
Trustee a register (the register maintained in such office and in any other
office or agency of the Company in a Place of Payment 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 Securities and of transfers of Securities. The Trustee is hereby
appointed "Security Registrar" for the purpose of registering Securities and
transfers of Securities as herein provided.

        Upon surrender for registration of transfer of any Security of a series
at the office or agency of the Company in a Place of Payment for that series,
the Company shall execute, and the Trustee shall authenticate and deliver, in
the name of the designated transferee or transferees, one or more new Securities
of the same series, of any authorized denominations and of like tenor and
aggregate principal amount.

        At the option of the Holder, Securities of any series may be exchanged
for other Securities of the same series, of any authorized denominations and of
like tenor and aggregate principal amount, upon surrender of the Securities to
be exchanged at such office or agency. Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

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

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

        No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906 or 1107 not involving any transfer.

        If the Securities of any series (or of any series and specified tenor)
are to be redeemed in part, the Company shall not be required (A) to issue,
register the transfer of or exchange any Securities of that series (or of that
series and specified tenor, as the case may be) during a period beginning at the
opening of business 15 days before the day of the mailing of a notice of
redemption of any such Securities selected for redemption under Section 1103 and
ending at the close of business on the day of such mailing, or (B) to register
the transfer of or exchange any Security so selected for redemption in whole or
in part, except the unredeemed portion of any Security being redeemed in part.


                                      -28-

<PAGE>   36
        The provisions of Clauses (1), (2), (3) and (4) below shall apply only
to Global Securities:

        (1) Each Global Security authenticated under this Indenture shall be
registered in the name of the Depositary designated 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.

        (2) 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 (A) such Depositary (i) has notified the Company that it is
unwilling or unable to continue as Depositary for such Global Security or (ii)
has ceased to be a clearing agency registered under the Exchange Act, (B) there
shall have occurred and be continuing an Event of Default with respect to such
Global Security or (C) there shall exist such circumstances, if any, in addition
to or in lieu of the foregoing as have been specified for this purpose as
contemplated by Section 301.

        (3) Subject to Clause (2) above, any exchange of a Global Security for
other Securities may be made in whole or in part, and all Securities issued in
exchange for a Global Security or any portion thereof shall be registered in
such names as the Depositary for such Global Security shall direct.

        (4) 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 Section, Section 304, 306, 906 or 1107 or
otherwise, shall be authenticated and delivered in the form of, and shall be, a
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.

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

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

        If there shall be delivered to the Company and the Trustee (i) evidence
to their satisfaction of the destruction, loss or theft of any Security and (ii)
such security or indemnity as may be required by them to save each of them and
any agent of either of them harmless, then, in the absence of notice to the
Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of the same series and 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 may,
instead of issuing a new Security, pay such Security.


                                      -29-

<PAGE>   37
        Upon the issuance of any new Security under this Section, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

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

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

SECTION 307.      PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

        Except as otherwise provided as contemplated by Section 301 with respect
to any series of Securities, 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 of any series 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 of such series (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 of such series
and the date of the proposed payment, and at the same time the Company shall
deposit with the Trustee an amount of money equal to the aggregate amount
proposed to be paid in respect of such Defaulted Interest or shall make
arrangements satisfactory to the Trustee for such deposit prior to the date of
the proposed payment, such money when deposited to be held in trust for the
benefit of the Persons entitled to such Defaulted Interest as in this Clause
provided. Thereupon the Trustee shall fix a Special Record Date for the payment
of such Defaulted Interest which shall be not more than 15 days and not less
than 10 days prior to the date of the proposed payment and not less than 10 days
after the receipt by the Trustee of the notice of the proposed payment. The
Trustee shall promptly notify the Company of such Special Record Date and, in
the name and at the expense of the Company, shall cause notice of the proposed
payment of such Defaulted Interest and the Special Record Date therefor to be
given to each Holder of Securities of such series in the manner set forth in
Section 106, not less than 10 days prior to such Special Record Date. Notice of
the proposed payment of such Defaulted Interest and the Special Record Date
therefor having

                                      -30-

<PAGE>   38
been so mailed, such Defaulted Interest shall be paid to the Persons in whose
names the Securities of such series (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 on the
Securities of any series in any other lawful manner not inconsistent with the
requirements of any securities exchange on which such Securities may be listed,
and upon such notice as may be required by such exchange, if, after notice given
by the Company to the Trustee of the proposed payment pursuant to this Clause,
such manner of payment shall be deemed practicable by the Trustee.

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

        Subject to the provisions of Section 1402, in the case of any Security
(or any part thereof) which is converted after any Regular Record Date and on or
prior to the next succeeding Interest Payment Date (other than any Security the
principal of (or premium, if any, on) which shall become due and payable,
whether at Stated Maturity or by declaration of acceleration or otherwise prior
to such Interest Payment Date), interest whose Stated Maturity is on such
Interest Payment Date shall be payable on such Interest Payment Date
notwithstanding such conversion and such interest (whether or not punctually
paid or duly provided for) shall be paid to the Person in whose name that
Security (or any one or more Predecessor Securities) is registered at the close
of business on such Regular Record Date. Except as otherwise expressly provided
in the immediately preceding sentence or in Section 1402, in the case of any
Security (or any part thereof) which is converted, interest whose Stated
Maturity is after the date of conversion of such Security (or such part thereof)
shall not be payable.

SECTION 308.      PERSONS DEEMED OWNERS.

        Prior to due presentment of a Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name such Security is registered as the owner of such Security
for the purpose of receiving payment of principal of and any premium and
(subject to Section 307) any 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 309.      CANCELLATION.

        All Securities surrendered for payment, redemption, registration of
transfer or exchange or for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be delivered to the Trustee
and shall be promptly canceled by it. The Company may at any time deliver to the
Trustee for cancellation any Securities previously authenticated and delivered
hereunder which the Company may have acquired in any manner whatsoever, and may
deliver to the Trustee (or to any other Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold, and all Securities so delivered shall be promptly
canceled

                                      -31-

<PAGE>   39
by the Trustee. No Securities shall be authenticated in lieu of or in exchange
for any Securities canceled as provided in this Section, except as expressly
permitted by this Indenture. All canceled Securities held by the Trustee shall
be returned to the Company.

SECTION 310.      COMPUTATION OF INTEREST.

        Except as otherwise specified as contemplated by Section 301 for
Securities of any series, interest on the Securities of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

SECTION 311.      CUSIP NUMBERS.

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


                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.      SATISFACTION AND DISCHARGE OF INDENTURE.

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

        (1)    either

               (A) all 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 306 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 1003) have been delivered to the Trustee for cancellation; or


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<PAGE>   40
               (B) all such Securities not theretofore delivered to the Trustee
for cancellation

                        (i)   have become due and payable, or

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

        (2) the Company has paid or caused to be paid all other sums payable
hereunder by the Company; 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 607, the obligations of
the Company to any Authenticating Agent under Section 614 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of Clause (1) of
this Section, the obligations of the Trustee under Section 402 and the last
paragraph of Section 1003 shall survive.

SECTION 402.      APPLICATION OF TRUST MONEY.

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


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<PAGE>   41
                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.      EVENTS OF DEFAULT.

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

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

        (2) default in the payment of the principal of or any premium on any
Security of that series at its Maturity; or

        (3) default in the deposit of any sinking fund payment, when and as due
by the terms of a Security of that series; or

        (4) 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
whose performance or whose breach is elsewhere in this Section specifically
dealt with or which has expressly been included in this Indenture solely for the
benefit of series of Securities other than that series), and continuance of such
default or breach for a period of 90 days after there has been given, by
registered or certified mail, to the Company by the Trustee or to the Company
and the Trustee by the Holders of at least 25% in principal amount of the
Outstanding Securities of that series 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

        (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 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 90 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

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<PAGE>   42
any bankruptcy or insolvency case or proceeding against it, or the filing by it
of a petition or answer or consent seeking reorganization or relief under any
applicable Federal or State law, or the consent by it to the filing of such
petition or to the appointment of or taking possession by a custodian, receiver,
liquidator, assignee, trustee, sequestrator or other similar official of the
Company or 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; or

        (7) any other Event of Default provided with respect to Securities of
that series.

SECTION 502.      ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

        If an Event of Default (other than an Event of Default specified in
Section 501(5) or 501(6)) with respect to Securities of any series at the time
Outstanding 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
of that series may declare the principal amount of all the Securities of that
series (or, if any Securities of that series are Original Issue Discount
Securities, such portion of the principal amount of such Securities as may be
specified by the terms thereof) to be due and payable immediately, by a notice
in writing to the Company (and to the Trustee if given by Holders), and upon any
such declaration such principal amount (or specified amount) shall become
immediately due and payable. If an Event of Default specified in Section 501(5)
or 501(6) with respect to Securities of any series at the time Outstanding
occurs, the principal amount of all the Securities of that series (or, if any
Securities of that series are Original Issue Discount Securities, such portion
of the principal amount of such Securities as may be specified by the terms
thereof) shall automatically, and without any declaration or other action on the
part of the Trustee or any Holder, become immediately due and payable.

        At any time after such a declaration of acceleration with respect to
Securities of any series 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 provided, the Holders of a majority in principal amount of the
Outstanding Securities of that series, 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 of that series,

               (B) the principal of (and premium, if any, on) any Securities of
        that series which have become due otherwise than by such declaration of
        acceleration and any interest thereon at the rate or rates prescribed
        therefor in such Securities,

               (C) to the extent that payment of such interest is lawful,
        interest upon overdue interest at the rate or rates prescribed therefor
        in such Securities, and

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<PAGE>   43
               (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 with respect to Securities of that series,
other than the non-payment of the principal of Securities of that series which
have become due solely by such declaration of acceleration, have been cured or
waived as provided in Section 513.

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

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

        The Company covenants that if

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

        (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, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and any premium and interest and, to the extent that
payment of such interest shall be legally enforceable, interest on any overdue
principal and premium and on any overdue interest, at the rate or rates
prescribed therefor in such Securities, and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

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

SECTION 504.    TRUSTEE MAY FILE PROOFS OF CLAIM.

        In case of any judicial proceeding relative to the Company (or any other
obligor upon the Securities), its property or its creditors, the Trustee shall
be entitled and empowered, by intervention in such proceeding or otherwise, to
take any and all actions authorized under the Trust Indenture Act in order to
have claims of the Holders and the Trustee allowed in any such proceeding. In
particular, the Trustee shall be authorized to collect and receive any moneys or
other property payable or deliverable on any such claims and to distribute the
same; and any custodian, receiver, assignee, trustee, liquidator, sequestrator
or other similar official in any such judicial proceeding is hereby authorized
by each Holder to make such payments to the Trustee and, in the event that the
Trustee shall consent to the making of

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<PAGE>   44



such payments directly to the Holders, to pay to the Trustee any amount due it
for the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 607.

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

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

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

SECTION 506.      APPLICATION OF MONEY COLLECTED.

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

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

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

SECTION 507.      LIMITATION ON SUITS.

        No Holder of any Security of any series 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 with respect to the Securities of that series;


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<PAGE>   45

        (2) the Holders of not less than 25% in principal amount of the
Outstanding Securities of that series 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 of that series;

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 to 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 of such
Holders.

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

        Notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and any premium and (subject to Section 307)
interest on such Security on the respective Stated Maturities expressed in such
Security (or, in the case of redemption, on the Redemption Date), to convert
such Securities in accordance with Article Fourteen and to institute suit for
the enforcement of any such payment, and such rights shall not be impaired
without the consent of such Holder.

SECTION 509.      RESTORATION OF RIGHTS AND REMEDIES.

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

SECTION 510.      RIGHTS AND REMEDIES CUMULATIVE.

        Except as otherwise provided with respect to the replacement or payment
of mutilated, destroyed, lost or stolen Securities in the last paragraph of
Section 306, no right or remedy herein conferred upon or reserved to the Trustee
or to the Holders is intended to be exclusive of any other right or remedy, and

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<PAGE>   46
every right and remedy shall, to the extent permitted by law, be cumulative and
in addition to every other right and remedy given hereunder or now or hereafter
existing at law or in equity or otherwise. The assertion or employment of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

SECTION 511.      DELAY OR OMISSION NOT WAIVER.

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

SECTION 512.      CONTROL BY HOLDERS.

        The Holders of a majority in principal amount of the Outstanding
Securities of any series 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, with respect to the
Securities of such series, provided that

        (1) such direction shall not be in conflict with any rule of law or with
this Indenture and the Trustee shall not have determined that the action so
directed would be unjustly prejudicial to Holders of Securities of that series,
or any other series, not taking part in such direction, and

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

SECTION 513.      WAIVER OF PAST DEFAULTS.

        The Holders of not less than a majority in principal amount of the
Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past default hereunder with respect to such
series and its consequences, except a default

        (1) in the payment of the principal of or any premium or interest on any
Security of such series, or

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


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<PAGE>   47

SECTION 514.      UNDERTAKING FOR COSTS.

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

SECTION 515.      WAIVER OF USURY, STAY OR EXTENSION LAWS.

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

                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601.      CERTAIN DUTIES AND RESPONSIBILITIES.

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

SECTION 602.      NOTICE OF DEFAULTS.

        If a default occurs hereunder with respect to Securities of any series,
the Trustee shall give the Holders of Securities of such series notice of such
default known to it as and to the extent provided by the Trust Indenture Act;
provided, however, that in the case of any default of the character specified in
Section 501(4) with respect to Securities of such series, no such notice to
Holders shall be given until at least 30 days after the occurrence thereof. For
the purpose of this Section, the term "default" means any

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<PAGE>   48
event which is, or after notice or lapse of time or both would become, an Event
of Default with respect to Securities of such series.

SECTION 603.      CERTAIN RIGHTS OF TRUSTEE.

        Subject to the provisions of Section 601:

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

        (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 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, other evidence of indebtedness or other paper or document, but the
Trustee, in its discretion, may make such further inquiry or investigation into
such facts or matters as it may see fit, and, if the Trustee shall determine to
make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Company, personally or by agent or attorney;

        (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;

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<PAGE>   49
        (8) 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
this Indenture; and

        (9) the Trustee shall not be deemed to have notice of any default or
Event of Default unless a responsible officer of the Trustee has actual
knowledge thereof or unless written notice of any event which is in fact such a
default is received by the Trustee at the Corporate Trust Office of the Trustee,
and such notice references the Securities and this Indenture.

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

        The recitals contained herein and in the Securities, except the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and neither the Trustee nor any Authenticating Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities. Neither the
Trustee nor any Authenticating Agent shall be accountable for the use or
application by the Company of Securities or the proceeds thereof.

SECTION 605.      MAY HOLD SECURITIES AND ACT AS TRUSTEE UNDER OTHER INDENTURES.

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

        Subject to the limitations imposed by the Trust Indenture Act, nothing
in this Indenture shall prohibit the Trustee from becoming and acting as trustee
under other indentures under which other securities, or certificates of interest
of participation in other securities, of the Company are outstanding in the same
manner as if it were not Trustee hereunder.

SECTION 606.      MONEY HELD IN TRUST.

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


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<PAGE>   50
SECTION 607.      COMPENSATION AND REIMBURSEMENT.

        The Company agrees

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

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

        (3) to indemnify the Trustee 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 the
trust or trusts hereunder, including the costs and expenses of defending itself
against any claim (whether asserted by the Company, a Holder or any other
Person) 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 501(5) or Section 501(6), the expenses
(including the reasonable charges and expenses of its counsel) and the
compensation for the services are intended to constitute expenses of
administration under any applicable Federal or State Bankruptcy, insolvency or
other similar law.

SECTION 608.      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. To the extent
permitted by such Act, the Trustee shall not be deemed to have a conflicting
interest by virtue of being a trustee under this Indenture with respect to
Securities of more than one series.

SECTION 609.      CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

        There shall at all times be one (and only one) Trustee hereunder with
respect to the Securities of each series, which may be Trustee hereunder for
Securities of one or more other series. Each Trustee shall be a Person that is
eligible pursuant to the Trust Indenture Act to act as such and has (or if the
Trustee is a member of a bank holding company system, its bank holding company
has) a combined capital and surplus of at least $50,000,000. If any such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of its supervising or examining authority, then for the purposes of
this Section and to the extent permitted by the Trust Indenture Act, the
combined capital and surplus of such Person shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time the Trustee with respect to the Securities of any

                                      -43-

<PAGE>   51
series shall cease to be eligible in accordance with the provisions of this
Section, it shall resign immediately in the manner and with the effect
hereinafter specified in this Article.

SECTION 610.      RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

        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 611.

        The Trustee may resign at any time with respect to the Securities of one
or more series by giving written notice thereof to the Company. If the
instrument of acceptance by a successor Trustee required by Section 611 shall
not have been delivered to the Trustee within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition, at the expense of the
Company, any court of competent jurisdiction for the appointment of a successor
Trustee with respect to the Securities of such series.

        The Trustee may be removed at any time with respect to the Securities of
any series by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series, delivered to the Trustee and to the
Company. If the instrument of acceptance by a successor Trustee required by
Section 611 shall not have been delivered to the Trustee within 30 days after
the giving of such notice of resignation, the resigning Trustee may petition, at
the expense of the Company, any court of competent jurisdiction for the
appointment of a successor Trustee with respect to the Securities of such
series.

        If at any time:

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

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

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

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

        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, with respect
to the Securities of one or more series, the Company, by a Board Resolution,
shall promptly appoint a successor Trustee or Trustees with respect to the

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<PAGE>   52
Securities of that or those series (it being understood that any such successor
Trustee may be appointed with respect to the Securities of one or more or all of
such series and that at any time there shall be only one Trustee with respect to
the Securities of any particular series) and shall comply with the applicable
requirements of Section 611. If, within one year after such resignation, removal
or incapability, or the occurrence of such vacancy, a successor Trustee with
respect to the Securities of any series shall be appointed by Act of the Holders
of a majority in principal amount of the Outstanding Securities of such series
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 611, become the successor Trustee
with respect to the Securities of such series and to that extent supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series shall have been so appointed by the Company or
the Holders and accepted appointment in the manner required by Section 611, the
retiring Trustee may petition, or any Holder who has been a bona fide Holder of
a Security of such series 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 with respect to the Securities of such
series.

        The Company shall give notice of each resignation and each removal of
the Trustee with respect to the Securities of any series and each appointment of
a successor Trustee with respect to the Securities of any series to all Holders
of Securities of such series in the manner provided in Section 106. Each notice
shall include the name of the successor Trustee with respect to the Securities
of such series and the address of its Corporate Trust Office.

SECTION 611.      ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

        In case of the appointment hereunder of a successor Trustee with respect
to all Securities, every such successor Trustee so appointed 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.

        In case of the appointment hereunder of a successor Trustee with respect
to the Securities of one or more (but not all) series, the Company, the retiring
Trustee and each successor Trustee with respect to the Securities of one or more
series shall execute and deliver an indenture supplemental hereto wherein each
successor Trustee shall accept such appointment and which (1) shall contain such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each successor Trustee all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor Trustee relates, (2) if the retiring Trustee
is not retiring with respect to all Securities, shall contain such provisions as
shall be deemed necessary or desirable to confirm that all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring Trustee is not retiring shall continue
to be vested in the retiring

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<PAGE>   53
Trustee, and (3) shall add to or change any of the provisions of this Indenture
as shall be necessary to provide for or facilitate the administration of the
trusts hereunder by more than one Trustee, it being understood that nothing
herein or in such supplemental indenture shall constitute such Trustees
co-trustees of the same trust and that each such Trustee shall be trustee of a
trust or trusts hereunder separate and apart from any trust or trusts hereunder
administered by any other such Trustee; and upon the execution and delivery of
such supplemental indenture the resignation or removal of the retiring Trustee
shall become effective to the extent provided therein and each 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 with respect
to the Securities of that or those series to which the appointment of such
successor Trustee relates; but, on request of the Company or any successor
Trustee, such retiring Trustee shall, upon payment in full of all of its
charges, duly assign, transfer and deliver to such successor Trustee all
property and money held by such retiring Trustee hereunder with respect to the
Securities of that or those series to which the appointment of such successor
Trustee relates.

        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 referred to in the
first or second preceding paragraph, as the case may be.

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

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

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

SECTION 613.      PREFERENTIAL COLLECTION OF CLAIMS AGAINST 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).

SECTION 614.      APPOINTMENT OF AUTHENTICATING AGENT.

        The Trustee may appoint an Authenticating Agent or Agents with respect
to one or more series of Securities which shall be authorized to act on behalf
of the Trustee to authenticate Securities of such series issued upon original
issue and upon exchange, registration of transfer or partial redemption thereof

                                      -46-

<PAGE>   54
or pursuant to Section 306, and Securities so authenticated shall be entitled to
the benefits of this Indenture and shall be valid and obligatory for all
purposes as if authenticated by the Trustee hereunder. Wherever reference is
made in this Indenture to the authentication and delivery of Securities by the
Trustee or the Trustee's certificate of authentication, such reference shall be
deemed to include authentication and delivery on behalf of the Trustee by an
Authenticating Agent and a certificate of authentication executed on behalf of
the Trustee by an Authenticating Agent. Each Authenticating Agent shall be
acceptable to the Company and shall at all times be a corporation organized and
doing business under the laws of the United States of America, any State thereof
or the District of Columbia, authorized under such laws to act as Authenticating
Agent, having (or if the Authenticating Agent is a member of a bank holding
company system, its bank holding company has) a combined capital and surplus of
not less than $50,000,000 and subject to supervision or examination by Federal
or State authority. If such Authenticating Agent publishes reports of condition
at least annually, pursuant to law or to the requirements of said supervising or
examining authority, then for the purposes of this Section, the combined capital
and surplus of such Authenticating Agent shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time an Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section, such Authenticating Agent shall
resign immediately in the manner and with the effect specified in this Section.

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

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

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

        If an appointment with respect to one or more series is made pursuant to
this Section 612, the Securities of such series may have endorsed thereon, in
addition to the Trustee's certificate of authentication, an alternative
certificate of authentication in the following form:

                                      -47-

<PAGE>   55
        This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                      THE BANK OF NEW YORK, N.A.,
                                         As Trustee

                                         By:
                                            ---------------------------- ,
                                              As Authenticating Agent

                                         By:
                                            ----------------------------
                                              Authorized Signatory


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

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

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

        (1) semi-annually, not later 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 of each series as of such Regular Record
Date, as the case may be, and

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

provided that no such list need be furnished by the Company to the Trustee so
long as the Trustee is acting as Security Registrar.

SECTION 702.      PRESERVATION OF INFORMATION; COMMUNICATIONS TO HOLDERS.

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

        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 privileges of the Trustee, shall be as provided by the Trust
Indenture Act.


                                      -48-

<PAGE>   56
        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 703.      REPORTS BY TRUSTEE.

        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.

        If required by Section 313(a) of the Trust Indenture Act, the Trustee
shall, within sixty days after each July 15 following the date of this Indenture
deliver to Holders a brief report, dated as of such July 15, which complies with
the provisions of such Section 313(a).

        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 any
Securities are listed, with the Commission and with the Company. The Company
will promptly notify the Trustee when any Securities are listed on any stock
exchange or of any delisting thereof.

SECTION 704.      REPORTS BY COMPANY.

        The Company shall file with the Trustee and the Commission, and transmit
to Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to the Trust Indenture 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 Exchange Act shall be filed with the
Trustee within 15 days after the same is so required to be filed with the
Commission.

        Delivery of such reports, information and documents to the Trustee is
for informational purposes only and the Trustee's receipt of such shall not
constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Company's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).


                                  ARTICLE EIGHT

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.      COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS.

        The Company shall not consolidate with or merge into any other Person
(in a transaction in which the Company is not the surviving corporation) or
convey, transfer or lease its properties and assets substantially as an entirety
to any Person, unless:

                                      -49-

<PAGE>   57
        (1) in case the Company shall consolidate with or merge into another
Person (in a transaction in which the Company is not the surviving corporation)
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, trust
or other business entity, 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 and any premium and interest on all the
Securities and the performance or observance of every covenant of this Indenture
on the part of the Company to be performed or observed and the conversion rights
shall be provided for in accordance with Article Fourteen, if applicable, or as
otherwise specified pursuant to Section 301, by supplemental indenture
satisfactory in form to the Trustee, executed and delivered to the Trustee, by
the Person (if other than the Company) formed by such consolidation or into
which the Company shall have been merged or by the Person which shall have
acquired the Company's assets;

        (2) immediately after giving effect to such transaction, no Event of
Default, and no event which, 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.

SECTION 802.      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 the properties
and assets of the Company substantially as an entirety in accordance with
Section 801, the successor Person formed by such consolidation or into which the
Company is merged or to which such conveyance, transfer or lease is made shall
succeed to, and be substituted for, and may exercise every right and power of,
the Company under this Indenture with the same effect as if such successor
Person had been named as the Company herein, and thereafter, except in the case
of a lease, the predecessor Person shall be relieved of all obligations and
covenants under this Indenture and the Securities.


                                      -50-

<PAGE>   58
                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

SECTION 901.      SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

        Without the consent of any Holders, 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, in form satisfactory to the
Trustee, for any of the following purposes:

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

        (2) to add to the covenants of the Company for the benefit of the
Holders of all or any series of Securities (and if such covenants are to be for
the benefit of less than all series of Securities, stating that such covenants
are expressly being included solely for the benefit of such series) or to
surrender any right or power herein conferred upon the Company; or

        (3) to add any additional Events of Default for the benefit of the
Holders of all or any series of Securities (and if such additional Events of
Default are to be for the benefit of less than all series of Securities, stating
that such additional Events of Default are expressly being included solely for
the benefit of such series); or

        (4) to add to or change any of the provisions of this Indenture to such
extent as shall be necessary to permit or facilitate the issuance of Securities
in bearer form, registrable or not registrable as to principal, and with or
without interest coupons, or to permit or facilitate the issuance of Securities
in uncertificated form; or

        (5) to add to, change or eliminate any of the provisions of this
Indenture in respect of one or more series of Securities, provided that any such
addition, change or elimination (A) shall neither (i) apply to any Security of
any series created prior to the execution of such supplemental indenture and
entitled to the benefit of such provision nor (ii) modify the rights of the
Holder of any such Security with respect to such provision or (B) shall become
effective only when there is no such Security Outstanding; or

        (6)    to secure the Securities; or

        (7) to establish the form or terms of Securities of any series as
permitted by Sections 201 and 301; or

        (8) to evidence and provide for the acceptance of appointment hereunder
by a successor Trustee with respect to the Securities of one or more series and
to add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee, pursuant to the requirements of Section 611;
or

                                      -51-

<PAGE>   59

        (9) to make provision with respect to the conversion rights of Holders
pursuant to the requirements of Article Fourteen, including providing for the
conversion of the securities into any security (other than the Common Stock of
the Company) or property of the Company; or

        (10) to cure any ambiguity, to correct or supplement any provision
herein which may be defective or inconsistent with any other provision herein,
or to make any other provisions with respect to matters or questions arising
under this Indenture, provided that such action pursuant to this Clause (10)
shall not adversely affect the interests of the Holders of Securities of any
series in any material respect; or

        (11) to supplement any of the provisions of the Indenture to such extent
as shall be necessary to permit or facilitate the defeasance and discharge of
any series of Securities pursuant to Articles Four and Thirteen, provided that
any such action shall not adversely affect the interests of the Holders of
Securities of such series or any other series of Securities in any material
respect.

SECTION 902.      SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

        With the consent of the Holders of a majority in principal amount of the
Outstanding Securities of each series affected by such supplemental indenture,
by Act of said Holders delivered to the Company and the Trustee, 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 of such series under this Indenture; provided, however, that no such
supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby,

        (1) change the Stated Maturity of the principal of, or any installment
of principal of or interest on, any Security, or reduce the principal amount
thereof or the rate of interest thereon or any premium payable upon the
redemption thereof, or reduce the amount of the principal of an Original Issue
Discount Security or any other Security which would be due and payable upon a
declaration of acceleration of the Maturity thereof pursuant to Section 502, or
change any Place of Payment where, or the coin or currency in which, any
Security or any premium or interest thereon is payable, or impair the right to
institute suit for the enforcement of any such payment on or after the Stated
Maturity thereof (or, in the case of redemption, on or after the Redemption
Date), or

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

        (3) modify any of the provisions of this Section, Section 513 or Section
1010, except to increase any such percentage or to provide that certain other
provisions of this Indenture cannot be modified or waived without the consent of
the Holder of each Outstanding Security affected thereby;

                                      -52-

<PAGE>   60
provided, however, that this clause shall not be deemed to require the consent
of any Holder with respect to changes in the references to "the Trustee" and
concomitant changes in this Section and Section 1010, or the deletion of this
proviso, in accordance with the requirements of Sections 611 and 901(8), or

        (4) if applicable, make any change that adversely affects the right to
convert any security as provided in Article Fourteen or pursuant to Section 301
(except as permitted by Section 901(9)) or decrease the conversion rate or
increase the conversion price of any such security.

        A supplemental indenture which changes or eliminates any covenant or
other provision of this Indenture which has expressly been included solely for
the benefit of one or more particular series of Securities, or which modifies
the rights of the Holders of Securities of such series with respect to such
covenant or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.

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

SECTION 903.      EXECUTION OF SUPPLEMENTAL INDENTURES.

        In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Sections 601 and 603) shall be fully protected in relying upon,
an Opinion of Counsel stating that the execution of such supplemental indenture
is authorized or permitted by this Indenture. The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

SECTION 904.      EFFECT OF SUPPLEMENTAL INDENTURES.

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

SECTION 905.      CONFORMITY WITH TRUST INDENTURE ACT.

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

SECTION 906.      REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

        Securities of any series 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

                                      -53-

<PAGE>   61
shall so determine, new Securities of any series so modified as to conform, in
the opinion of the Trustee and the Company, to any such supplemental indenture
may be prepared and executed by the Company and authenticated and delivered by
the Trustee in exchange for Outstanding Securities of such series.

                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001.          PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

        The Company covenants and agrees for the benefit of each series of
Securities that it will duly and punctually pay the principal of and any premium
and interest on the Securities of that series in accordance with the terms of
the Securities and this Indenture.

SECTION 1002.          MAINTENANCE OF OFFICE OR AGENCY.

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

        The Company may also from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all such purposes and may from time to time rescind
such designations; provided, however, that no such designation or rescission
shall in any manner relieve the Company of its obligation to maintain an office
or agency in each Place of Payment for Securities of any series for such
purposes. The Company will give prompt written notice to the Trustee of any such
designation or rescission and of any change in the location of any such other
office or agency.

SECTION 1003.          MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

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


                                      -54-

<PAGE>   62
        Whenever the Company shall have one or more Paying Agents for any series
of Securities, it will, on or prior to each due date of the principal of or any
premium or interest on any Securities of that series, deposit with a Paying
Agent a sum sufficient to pay such amount, such sum to be held as provided by
the Trust Indenture Act, and (unless such Paying Agent is the Trustee) the
Company will promptly notify the Trustee of its action or failure so to act.

        The Company will cause each Paying Agent for any series of Securities
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) comply with the provisions of
the Trust Indenture Act applicable to it as a Paying Agent and (2) during the
continuance of any default by the Company (or any other obligor upon the
Securities of that series) in the making of any payment in respect of the
Securities of that series, upon the written request of the Trustee, forthwith
pay to the Trustee all sums held in trust by such Paying Agent for payment in
respect of the Securities of that series.

        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 or any premium or
interest on any Security of any series and remaining unclaimed for a period
ending on the earlier of the date that is ten Business Days prior to the date
such money would escheat to the State or two years after such principal, premium
or interest has become due and payable shall be paid to the Company on Company
Request, or (if then held by the Company) shall be discharged from such trust;
and the Holder of such Security shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease.

SECTION 1004.          STATEMENT BY OFFICERS AS TO DEFAULT.

        The Company will 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 fiscal year of the Company ends on June 30;
and the Company will give the Trustee prompt written notice of any change of its
fiscal year.

                                      -55-

<PAGE>   63
SECTION 1005.          EXISTENCE.

        Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence.

SECTION 1006.          MAINTENANCE OF PROPERTIES.

        The Company will cause all properties used or useful in the conduct of
its business 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, and to the extent, 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 and not disadvantageous
in any material respect to the Holders.

SECTION 1007.          PAYMENT OF TAXES AND OTHER CLAIMS.

        The Company will pay or discharge or cause to be paid or discharged,
before the same shall become delinquent, (1) all taxes, assessments and
governmental charges levied or imposed upon the Company upon the income, profits
or property of the Company, and (2) all lawful claims for labor, materials and
supplies which, if unpaid, might by law become a lien upon the property of the
Company; provided, however, that the Company shall not be required to pay or
discharge or cause to be paid or discharged any such tax, assessment, charge or
claim (i) whose amount, applicability or validity is being contested in good
faith by appropriate proceedings or (ii) if the failure to pay or discharge
would not have a material adverse effect on the assets, business, operations,
properties or condition (financial or otherwise) of the Company and its
subsidiaries, taken as a whole.

SECTION 1008.          LIMITATION ON LIENS.

        The Company will not issue, incur, create, assume or guarantee, and will
not permit any Restricted Subsidiary to issue, incur, create, assume or
guarantee, any Secured Debt (as defined below) without in any such case
effectively providing concurrently with issuance, incurrence, creation,
assumption or guarantee of any such Secured Debt, or the grant of a mortgage
with respect to any such indebtedness, that the Securities (together with, if
the Company shall so determine, any other indebtedness of or guarantee by the
Company or such Restricted Subsidiary ranking equally with the Securities) shall
be secured equally and ratably with (or, at the option of the Company, prior to)
such Secured Debt. The foregoing restriction with respect to Secured Debt,
however, will not apply to:

        (1) mortgages on property existing at the time of acquisition thereof by
the Company or any Subsidiary, provided that such mortgages were in existence
prior to the contemplation of such acquisitions;


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<PAGE>   64
        (2) mortgages on property, shares of stock or indebtedness or other
assets of any corporation existing at the time such corporation becomes a
Restricted Subsidiary, provided that such mortgages are not incurred in
anticipation of such corporation becoming a Restricted Subsidiary (which may
include property previously leased by the Company and leasehold interests
thereon, provided that the lease terminates prior to or upon the acquisition);

        (3) mortgages on property, shares of stock or indebtedness existing at
the time of acquisition thereof by the Company or a Restricted Subsidiary or
mortgages thereon to secure the payment of all or any part of the purchase price
thereof, or mortgages on property, shares of stock or indebtedness to secure any
indebtedness for borrowed money incurred prior to, at the time of or within 270
days after, the latest of the acquisition thereof, or, in the case of property,
the completion of construction, the completion of improvements, or the
commencement of substantial commercial operation of such property for the
purpose of financing all or any part of the purchase price thereof, such
construction, or the making of such improvements;

        (4) mortgages to secure indebtedness owing to the Company or to a
Restricted Subsidiary:

        (5) mortgages existing at the date of this Indenture;

        (6) mortgages on property of a corporation existing at the time such
corporation is merged into or consolidated with the Company or a Subsidiary or
at the time of a sale, lease or other disposition of the properties of a
corporation as an entirety or substantially as an entirety to the Company or a
Restricted Subsidiary, provided that such mortgage was not incurred in
anticipation of such merger or consolidation or sale, lease or other
disposition;

        (7) mortgages in favor of the United States or any State, territory or
possession thereof (or the District of Columbia), or any department, agency,
instrumentality or political subdivision of the United States or any State,
territory or possession thereof (or the District of Columbia), to secure
partial, progress, advance or other payments pursuant to any contract or statute
or to secure any indebtedness incurred for the purpose of financing all or any
part of the purchase price of the cost of constructing or improving the property
subject to such mortgages;

        (8) mortgages created in connection with the acquisition of assets or a
project financed with, and created to secure, a Nonrecourse Obligation;

        (9) extensions, renewals, refinancings or replacements of any mortgage
referred to in the foregoing clauses (1), (2), (3), (4), (5), (6), (7) and (8)
provided, however, that any mortgages permitted by any of the foregoing clauses
(1), (2), (3), (4), (5), (6), (7) and (8) shall not extend to or cover any
property of the Company or such Restricted Subsidiary, as the case may be, other
than the property, if any, specified in such clauses and improvements thereto,
and provided further that any refinancing or replacement of any mortgages
permitted by the foregoing clauses (7) and (8) shall be of the type referred to
in such clauses (7) or (8), as the case may be.


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<PAGE>   65
        Notwithstanding the restrictions outlined in the preceding paragraph,
the Company or any Restricted Subsidiary will be permitted to issue, incur,
create, assume or guarantee debt secured by a mortgage which would otherwise be
subject to such restrictions, without equally and ratably securing the
Securities, provided that after giving effect thereto, the aggregate amount of
all debt so secured by mortgages (not including mortgages permitted under
clauses (1) through (9) above) does not exceed the greater of $300 million or
10% of the Consolidated Net Tangible Assets of the Company as most recently
determine on or prior to such date.

        For purposes of this Section 1008:

        (i) "Secured Debt" means any debt for borrowed money secured by a
mortgage upon any Principal Property of the Company or any Restricted Subsidiary
or upon any shares of stock or indebtedness (whether such Principal Property,
shares or indebtedness are now existing or owed or hereafter created or
acquired); and

        (ii) "mortgage" means a mortgage, security interest, pledge, lien,
charge or other encumbrance.

SECTION 1009.          LIMITATIONS ON SALE AND LEASEBACK TRANSACTIONS.

        The Company will not, nor will it permit any Restricted Subsidiary to,
enter into any Sale and Lease-Back Transaction with respect to any Principal
Property, other than any such transaction involving a lease for a term of not
more than three years of any such transaction between the Company and a
Restricted Subsidiary or between Restricted Subsidiaries, unless: (1) the
Company or such Restricted Subsidiary would be entitled to incurs indebtedness
secured by a mortgage on the Principal Property involved in such transaction at
least equal in amount to the Attributable Debt with respect to such Sale and
Lease-Back Transaction, without equally and ratably securing the Securities,
pursuant to Section 1008; or (2) the Company shall apply an amount equal to the
greater of the net proceeds of such sale or the Attributable Debt with respect
to such Sale and Lease-Back Transaction within 180 days of such sale to either
(or a combination of) the retirement (other than mandatory retirement, mandatory
prepayment or sinking fund payment or by a payment at maturity) of debt for
borrowed money of the Company or a Restricted Subsidiary that matures more than
12 months after the creation of such indebtedness or the purchase, construction
or development of other comparable property.

        Notwithstanding the restrictions outlined is the preceding paragraph,
the Company or any Restricted Subsidiary will be permitted to enter into Sale
and Lease-Back Transactions which would otherwise be subject to such
restrictions, without applying the net proceeds of such transactions in the
manner set forth in clause (b) above, provided that after giving effect thereto,
the aggregate amount of such sale and Lease-Back Transactions, together with the
aggregate amount of all debt secured by mortgages not permitted by clauses (1)
through (9) under Section 1008 above, does not exceed the greater of $300
million or 10% of Consolidated Net Tangible Assets of the Company as most
recently determined on or prior to such date.


                                      -58-

<PAGE>   66
SECTION 1010.          WAIVER OF CERTAIN COVENANTS.

        Except as otherwise specified as contemplated by Section 301 for
Securities of such series, the Company may, with respect to the Securities of
any series, omit in any particular instance to comply with any term, provision
or condition set forth in any covenant provided pursuant to Section 301(19),
901(2), 901(7), 1006, 1007, 1008 or 1009 for the benefit of the Holders of such
series if before the time for such compliance the Holders of at least a majority
in principal amount of the Outstanding Securities of such series shall, by Act
of such Holders, either waive such compliance in such instance or generally
waive compliance with such term, provision or condition, but no such waiver
shall extend to or affect such term, provision or condition except to the extent
so expressly waived, and, until such waiver shall become effective, the
obligations of the Company and the duties of the Trustee in respect of any such
term, provision or condition shall remain in full force and effect.

SECTION 1011.          CALCULATION OF ORIGINAL ISSUE DISCOUNT.

        The Company shall file with the Trustee promptly at the end of each
calendar year (i) a written notice specifying the amount of original issue
discount (including daily rates and accrual periods) accrued on Outstanding
Securities as of the end of such year and (ii) such other specific information
relating to such original issue discount as may then be relevant under the
Internal Revenue Code of 1986, as amended from time to time.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.          APPLICABILITY OF ARTICLE.

        Securities of any series which are redeemable before their Stated
Maturity shall be redeemable in accordance with their terms and (except as
otherwise specified as contemplated by Section 301 for such Securities) in
accordance with this Article.

SECTION 1102.          ELECTION TO REDEEM; NOTICE TO TRUSTEE.

        The election of the Company to redeem any Securities shall be evidenced
by a Board Resolution or in another manner specified as contemplated by Section
301 for such Securities. In case of any redemption at the election of the
Company of the Securities of any series (including any such redemption affecting
only a single Security), the Company shall, at least 35 days (or 45 days if less
than all the Securities of any series are to be redeemed) prior to the
Redemption Date fixed by the Company (unless a shorter notice shall be
satisfactory to the Trustee), notify the Trustee of such Redemption Date, of the
principal amount of Securities of such series to be redeemed and, if applicable,
of the tenor of the Securities to be redeemed. In the case of any redemption of
Securities prior to the expiration of any restriction on such redemption
provided in the terms of such Securities or elsewhere in this Indenture, the
Company shall furnish the Trustee with an Officers' Certificate evidencing
compliance with such restriction.

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<PAGE>   67
SECTION 1103.          SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.

        If less than all the Securities of any series are to be redeemed (unless
all the Securities of such series and of a specified tenor are to be redeemed or
unless such redemption affects only a single Security), the particular
Securities to be redeemed shall be selected not more than 45 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities of such series
not previously called for redemption, by lot, or in the Trustee's discretion, on
a pro-rata basis, provided that the unredeemed portion of the principal amount
of any Security shall be in an authorized denomination (which shall not be less
than the minimum authorized denomination) for such Security. If less than all
the Securities of such series and of a specified tenor are to be redeemed
(unless such redemption affects only a single Security), the particular
Securities to be redeemed shall be selected not more than 45 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities of such series
and specified tenor not previously called for redemption in accordance with the
preceding sentence.

        If any 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 shall be treated
by the Trustee as Outstanding for the purpose of such selection.

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

        The provisions of the two preceding paragraphs shall not apply with
respect to any redemption affecting only a single Security, whether such
Security is to be redeemed in whole or in part. In the case of any such
redemption in part, the unredeemed portion of the principal amount of the
Security shall be in an authorized denomination (which shall not be less than
the minimum authorized denomination) for such Security.

        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 1104.          NOTICE OF REDEMPTION.

        Notice of redemption shall be given by first-class mail, postage
prepaid, mailed not less than 30 nor more than 60 days prior to the Redemption
Date, unless a shorter period is specified in the Securities to be redeemed, to
each Holder of Securities to be redeemed, at its address appearing in the
Security Register.

        All notices of redemption shall identify the Securities to be redeemed
(including CUSIP number(s)) and shall state:


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<PAGE>   68

        (1) the Redemption Date,

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

        (3) if less than all the Outstanding Securities of any series consisting
of more than a single Security are to be redeemed, the identification (and, in
the case of partial redemption of any such Securities, the principal amounts) of
the particular Securities to be redeemed and, if less than all the Outstanding
Securities of any series consisting of a single Security are to be redeemed, the
principal amount of the particular Security to be redeemed,

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

        (5) the place or places where each such Security is to be surrendered
for payment of the Redemption Price,

        (6) if applicable, the conversion price, that the date on which the
right to convert the principal of the Securities or the portions thereof to be
redeemed will terminate will be the Business Day prior to the Redemption Date
and the place or places where such Securities may be surrendered for conversion,
and

        (7) that the redemption is for a sinking fund, if such is the case.

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

SECTION 1105.          DEPOSIT OF REDEMPTION PRICE.

        On or prior to 10:00 a.m., New York time, on any Redemption Date, the
Company shall deposit with the Trustee or with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) an amount of money sufficient to pay the Redemption
Price of, and (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.

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


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<PAGE>   69
SECTION 1106.          SECURITIES PAYABLE ON REDEMPTION DATE.

        Notice of redemption having been given as aforesaid, the Securities so
to be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest) such Securities shall cease to bear interest. Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption Price, together with accrued interest
to the Redemption Date; provided, however, that, unless otherwise specified as
contemplated by Section 301, installments of interest whose Stated Maturity is
on or prior to the Redemption Date will be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such at the
close of business on the relevant Record Dates according to their terms and the
provisions of Section 307.

        If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal and any premium shall, until
paid, bear interest from the Redemption Date at the rate prescribed therefor in
the Security.

SECTION 1107.          SECURITIES REDEEMED IN PART.

        Any Security which is to be redeemed only in part shall be surrendered
at a Place of Payment therefor (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 its attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and deliver to the Holder of such Security without service
charge, a new Security or Securities of the same series and of like tenor, of
any authorized denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered.

                                 ARTICLE TWELVE

                                  SINKING FUNDS

SECTION 1201.          APPLICABILITY OF ARTICLE.

        The provisions of this Article shall be applicable to any sinking fund
for the retirement of Securities of any series except as otherwise specified as
contemplated by Section 301 for such Securities.

        The minimum amount of any sinking fund payment provided for by the terms
of any Securities is herein referred to as a "mandatory sinking fund payment,"
and any payment in excess of such minimum amount provided for by the terms of
such Securities is herein referred to as an "optional sinking fund payment." If
provided for by the terms of any Securities, the cash amount of any sinking fund
payment may be subject to reduction as provided in Section 1202. Each sinking
fund payment shall be applied to the redemption of Securities as provided for by
the terms of such Securities.


                                      -62-

<PAGE>   70
SECTION 1202.       SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES.

        The Company (1) may deliver Outstanding Securities of a series (other
than any previously called for redemption) and (2) may apply as a credit
Securities of a series which have been redeemed either at the election of the
Company pursuant to the terms of such Securities or through the application of
permitted optional sinking fund payments pursuant to the terms of such
Securities, in each case in satisfaction of all or any part of any sinking fund
payment with respect to any Securities of such series required to be made
pursuant to the terms of such Securities as and to the extent provided for by
the terms of such Securities; provided that the Securities to be so credited
have not been previously so credited. The Securities to be so credited shall be
received and credited for such purpose by the Trustee at the Redemption Price,
as specified in the Securities so to be redeemed, for redemption through
operation of the sinking fund and the amount of such sinking fund payment shall
be reduced accordingly.

SECTION 1203.       REDEMPTION OF SECURITIES FOR SINKING FUND.

        Not less than 60 days prior to each sinking fund payment date for any
Securities, the Company will deliver to the Trustee an Officers' Certificate
specifying the amount of the next ensuing sinking fund payment for such
Securities pursuant to the terms of such Securities, the portion thereof, if
any, which is to be satisfied by payment of cash and the portion thereof, if
any, which is to be satisfied by delivering and crediting Securities pursuant to
Section 1202 and will also deliver to the Trustee any Securities to be so
delivered. Not less than 30 days prior to each such sinking fund payment date,
the Trustee shall select the Securities to be redeemed upon such sinking fund
payment date in the manner specified in Section 1103 and cause notice of the
redemption thereof to be given in the name of and at the expense of the Company
in the manner provided in Section 1104. Such notice having been duly given, the
redemption of such Securities shall be made upon the terms and in the manner
stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1301.      COMPANY'S OPTION TO EFFECT DEFEASANCE OR COVENANT DEFEASANCE.

        The Company may elect, at its option at any time, to have Section 1302
or Section 1303 applied to any Securities or any series of Securities, as the
case may be, designated pursuant to Section 301 as being defeasible pursuant to
such Section 1302 or 1303, in accordance with any applicable requirements
provided pursuant to Section 301 and upon compliance with the conditions set
forth below in this Article. Any such election shall be evidenced by a Board
Resolution or in another manner specified as contemplated by Section 301 for
such Securities.


                                      -63-

<PAGE>   71
SECTION 1302.          DEFEASANCE AND DISCHARGE.

        Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of Securities, as the case may be, the
Company shall be deemed to have been discharged from its obligations with
respect to such Securities as provided in this Section on and after the date the
conditions set forth in Section 1304 are satisfied (hereinafter called
"Defeasance"). For this purpose, such Defeasance means that the Company shall be
deemed to have paid and discharged the entire indebtedness represented by such
Securities and to have satisfied all its other obligations under such Securities
and this Indenture insofar as such Securities are concerned (and the Trustee, at
the expense of the Company, shall execute proper instruments acknowledging the
same), subject to the following which shall survive until otherwise terminated
or discharged hereunder: (1) the rights of Holders of such Securities to
receive, solely from the trust fund described in Section 1304 and as more fully
set forth in such Section, payments in respect of the principal of and any
premium and interest on such Securities when payments are due, (2) the Company's
obligations with respect to such Securities under Sections 304, 305, 306, 1002
and 1003, and, if applicable, Article Fourteen, (3) the rights, powers, trusts,
duties and immunities of the Trustee hereunder and (4) this Article. Subject to
compliance with this Article, the Company may exercise its option (if any) to
have this Section applied to any Securities notwithstanding the prior exercise
of its option (if any) to have Section 1303 applied to such Securities.

SECTION 1303.          COVENANT DEFEASANCE.

        Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of Securities, as the case may be, (1)
the Company shall be released from its obligations under Sections 1006 through
1009, inclusive, and any covenants provided pursuant to Section 301(19), 901(2)
or 901(7) for the benefit of the Holders of such Securities and (2) the
occurrence of any event specified in Sections 501(4) (with respect to any of
Sections 1006 through 1009, inclusive, and any such covenants provided pursuant
to Section 301(19), 901(2) or 901(7)) shall be deemed not to be or result in an
Event of Default, in each case with respect to such Securities as provided in
this Section on and after the date the conditions set forth in Section 1304 are
satisfied (hereinafter called "Covenant Defeasance"). For this purpose, such
Covenant Defeasance means that, with respect to such Securities, the Company may
omit to comply with and shall have no liability in respect of any term,
condition or limitation set forth in any such specified Section (to the extent
so specified in the case of Section 501(4)), whether directly or indirectly by
reason of any reference elsewhere herein to any such Section or by reason of any
reference in any such Section to any other provision herein or in any other
document, but the remainder of this Indenture and such Securities shall be
unaffected thereby.

SECTION 1304.          CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.

        The following shall be the conditions to the application of Section 1302
or Section 1303 to any Securities or any series of Securities, as the case may
be:

        (1) The Company shall irrevocably have deposited or caused to be
deposited with the Trustee (or another trustee which satisfies the requirements
contemplated by Section 609 and agrees to comply with the provisions of this
Article applicable to it) as trust funds in trust for the purpose of making the

                                      -64-

<PAGE>   72
following payments, specifically pledged as security for, and dedicated solely
to, the benefits of the Holders of such Securities, (A) money in an amount, or
(B) U.S. Government Obligations which through the scheduled payment of principal
and interest in respect thereof in accordance with their terms will provide, not
later than one day before the due date of any payment, money in an amount, or
(C) a combination thereof, in each case sufficient, in the opinion of a
nationally recognized firm of independent public accountants expressed in a
written certification thereof delivered to the Trustee, to pay and discharge,
and which shall be applied by the Trustee (or any such other qualifying trustee)
to pay and discharge, the principal of and any premium and interest on such
Securities on the respective Stated Maturities, in accordance with the terms of
this Indenture and such Securities. As used herein, "U.S. Government Obligation"
means (x) any security which is (i) a direct obligation of the United States of
America for the payment of which the full faith and credit of the United States
of America is pledged or (ii) an obligation of a Person controlled or supervised
by and acting as an agency or instrumentality of the United States of America
the payment of which is unconditionally guaranteed as a full faith and credit
obligation by the United States of America, which, in either case (i) or (ii),
is not callable or redeemable at the option of the issuer thereof, and (y) any
depositary receipt issued by a bank (as defined in Section 3(a)(2) of the
Securities Act) as custodian with respect to any U.S. Government Obligation
which is specified in Clause (x) above and held by such bank for the account of
the holder of such depositary receipt, or with respect to any specific payment
of principal of or interest on any U.S. Government Obligation which is so
specified and held, provided that (except as required by law) such custodian is
not authorized to make any deduction from the amount payable to the holder of
such depositary receipt from any amount received by the custodian in respect of
the U.S. Government Obligation or the specific payment of principal or interest
evidenced by such depositary receipt.

        (2) In the event of an election to have Section 1302 apply to any
Securities or any series of Securities, as the case may be, the Company shall
have delivered to the Trustee an Opinion of Counsel stating that (A) the Company
has received from, or there has been published by, the Internal Revenue Service
a ruling or (B) since the date of this instrument, there has been a change in
the applicable Federal income tax law, in either case (A) or (B) to the effect
that, and based thereon such opinion shall confirm that, the Holders of such
Securities will not recognize gain or loss for Federal income tax purposes as a
result of the deposit, Defeasance and discharge to be effected with respect to
such Securities and will be subject to Federal income tax on the same amount, in
the same manner and at the same times as would be the case if such deposit,
Defeasance and discharge were not to occur.

        (3) In the event of an election to have Section 1303 apply to any
Securities or any series of Securities, as the case may be, the Company shall
have delivered to the Trustee an Opinion of Counsel to the effect that the
Holders of such Securities will not recognize gain or loss for Federal income
tax purposes as a result of the deposit and Covenant Defeasance to be effected
with respect to such Securities and will be subject to Federal income tax on the
same amount, in the same manner and at the same times as would be the case if
such deposit and Covenant Defeasance were not to occur.

        (4) The Company shall have delivered to the Trustee an Officers'
Certificate to the effect that neither such Securities nor any other Securities
of the same series, if then listed on any securities exchange, will be delisted
as a result of such deposit.


                                      -65-

<PAGE>   73
        (5) No event which is, or after notice or lapse of time or both would
become, an Event of Default with respect to such Securities or any other
Securities shall have occurred and be continuing at the time of such deposit or,
with regard to any such event specified in Sections 501(5) and (6), at any time
on or prior to the 90th day after the date of such deposit (it being understood
that this condition shall not be deemed satisfied until after such 90th day).

        (6) Such Defeasance or Covenant Defeasance shall not cause the Trustee
to have a conflicting interest within the meaning of the Trust Indenture Act
(assuming all Securities are in default within the meaning of such Act).

        (7) Such Defeasance or Covenant Defeasance shall not result in a breach
or violation of, or constitute a default under, any other agreement or
instrument to which the Company is a party or by which it is bound.

        (8) Such Defeasance or Covenant Defeasance shall not result in the trust
arising from such deposit constituting an investment company within the meaning
of the Investment Company Act unless such trust shall be registered under such
Act or exempt from registration thereunder.

        (9) The Company shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent with respect to such Defeasance or Covenant Defeasance have been
complied with.

SECTION 1305.          DEPOSITED MONEY AND U.S. GOVERNMENT OBLIGATIONS TO BE
                       HELD IN TRUST; MISCELLANEOUS PROVISIONS.

        Subject to the provisions of the last paragraph of Section 1003, all
money and U.S. Government Obligations (including the proceeds thereof) deposited
with the Trustee or other qualifying trustee (solely for purposes of this
Section and Section 1306, the Trustee and any such other trustee are referred to
collectively as the "Trustee") pursuant to Section 1304 in respect of any
Securities shall be held in trust and applied by the Trustee, in accordance with
the provisions of such Securities and this Indenture, to the payment, either
directly or through any such Paying Agent (including the Company acting as its
own Paying Agent) as the Trustee may determine, to the Holders of such
Securities, of all sums due and to become due thereon in respect of principal
and any premium and interest, but money so held in trust need not be segregated
from other funds except to the extent required by law.

        The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the U.S. Government Obligations
deposited pursuant to Section 1304 or the principal and interest received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of Outstanding Securities.

        Anything in this Article to the contrary notwithstanding, the Trustee
shall deliver or pay to the Company from time to time upon Company Request any
money or U.S. Government Obligations held by it as provided in Section 1304 with
respect to any Securities which, in the opinion of a nationally recognized firm
of independent public accountants expressed in a written certification thereof
delivered

                                      -66-

<PAGE>   74
to the Trustee, are in excess of the amount thereof which would then be required
to be deposited to effect the Defeasance or Covenant Defeasance, as the case may
be, with respect to such Securities.

SECTION 1306.          REINSTATEMENT.

        If the Trustee or the Paying Agent is unable to apply any money in
accordance with this Article with respect to any Securities by reason of any
order or judgment of any court or governmental authority enjoining, restraining
or otherwise prohibiting such application, then the obligations under this
Indenture and such Securities from which the Company has been discharged or
released pursuant to Section 1302 or 1303 shall be revived and reinstated as
though no deposit had occurred pursuant to this Article with respect to such
Securities, until such time as the Trustee or Paying Agent is permitted to apply
all money held in trust pursuant to Section 1305 with respect to such Securities
in accordance with this Article; provided, however, that if the Company makes
any payment of principal of or any premium or interest on any such Security
following such reinstatement of its obligations, the Company shall be subrogated
to the rights (if any) of the Holders of such Securities to receive such payment
from the money so held in trust.

                                ARTICLE FOURTEEN

                      CONVERSION AND EXCHANGE OF SECURITIES

SECTION 1401.          APPLICABILITY OF ARTICLE.

        The provisions of this Article shall be applicable to the Securities of
any series which are convertible or exchangeable into shares of Common Stock of
the Company, and the issuance of such shares of Common Stock upon the conversion
or exchange of such Securities, except as otherwise specified as contemplated by
Section 301 for the Securities of such series.

SECTION 1402.          EXERCISE OF CONVERSION AND EXCHANGE PRIVILEGE.

        In order to exercise a conversion or exchange privilege, the Holder of a
Security of a series with such a privilege shall surrender such Security to the
Company at the office or agency maintained for that purpose pursuant to Section
1002, accompanied by a duly executed conversion or exchange notice to the
Company substantially in the form set forth in Section 206 stating that the
Holder elects to convert such Security or a specified portion thereof. Such
notice shall also state, if different from the name and address of such Holder,
the name or names (with address) in which the certificate or certificates for
shares of Common Stock which shall be issuable on such conversion or exchange
shall be issued. Securities surrendered for conversion or exchange shall (if so
required by the Company or the Trustee) be duly endorsed by or accompanied by
instruments of transfer in forms satisfactory to the Company and the Trustee
duly executed by the registered Holder or its attorney duly authorized in
writing; and Securities so surrendered for conversion or exchange (in whole or
in part) during the period from the close of business on any Regular Record Date
to the opening of business on the next succeeding Interest Payment Date
(excluding Securities or portions thereof called for redemption during the
period beginning at the close of business on a Regular Record Date and ending at
the opening of business on the first

                                      -67-

<PAGE>   75
Business Day after the next succeeding Interest Payment Date, or if such
Interest Payment Date is not a Business Day, the second such Business Day) shall
also be accompanied by payment in 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 then being converted or exchanged, and such interest
shall be payable to such registered Holder notwithstanding the conversion or
exchange of such Security, subject to the provisions of Section 307 relating to
the payment of Defaulted Interest by the Company. As promptly as practicable
after the receipt of such notice and of any payment required pursuant to a Board
Resolution and, subject to Section 303, set forth, or determined in the manner
provided, in an Officers' Certificate, or established in one or more indentures
supplemental hereto setting forth the terms of such series of Security, and the
surrender of such Security in accordance with such reasonable regulations as the
Company may prescribe, the Company shall issue and shall deliver, at the office
or agency at which such Security is surrendered, to such Holder or on its
written order, a certificate or certificates for the number of full shares of
Common Stock issuable upon the conversion or exchange of such Security (or
specified portion thereof), in accordance with the provisions of such Board
Resolution, Officers' Certificate or supplemental indenture, and cash as
provided therein in respect of any fractional share of such Common Stock
otherwise issuable upon such conversion or exchange. Such conversion or exchange
shall be deemed to have been effected immediately prior to the close of business
on the date on which such notice and such payment, if required, shall have been
received in proper order for conversion or exchange by the Company and such
Security shall have been surrendered as aforesaid (unless such Holder shall have
so surrendered such Security and shall have instructed the Company to effect the
conversion or exchange on a particular date following such surrender and such
Holder shall be entitled to convert or exchange such Security on such date, in
which case such conversion or exchange shall be deemed to be effected
immediately prior to the close of business on such date) and at such time the
rights of the Holder of such Security as such Security Holder shall cease and
the person or persons in whose name or names any certificate or certificates for
shares of Common Stock of the Company shall be issuable upon such conversion or
exchange shall be deemed to have become the Holder or Holders of record of the
shares represented thereby. Except as set forth above and subject to the final
paragraph of Section 307, no payment or adjustment shall be made upon any
conversion or exchange on account of any interest accrued on the Securities (or
any part thereof) surrendered for conversion or exchange or on account of any
dividends on the Common Stock of the Company issued upon such conversion or
exchange.

        In the case of any Security which is converted or exchanged in part
only, upon such conversion or exchange the Company shall execute and the Trustee
shall authenticate and deliver to or on the order of the Holder thereof, at the
expense of the Company, a new Security or Securities of the same series, of
authorized denominations, in aggregate principal amount equal to the unconverted
or unexchanged portion of such Security.

SECTION 1403.          NO FRACTIONAL SHARES.

        No fractional share of Common Stock of the Company shall be issued upon
conversions or exchanges of Securities of any series. If more than one Security
shall be surrendered for conversion or exchange at one time by the same Holder,
the number of full shares which shall be issuable upon conversion or exchange
shall be computed on the basis of the aggregate principal amount of the
Securities (or specified portions thereof to the extent permitted hereby) so
surrendered. If, except for the provisions

                                      -68-

<PAGE>   76
of this Section 1403, any Holder of a Security or Securities would be entitled
to a fractional share of Common Stock of the Company upon the conversion or
exchange of such Security or Securities, or specified portions thereof, the
Company shall pay to such Holder an amount in cash equal to the current market
value of such fractional share computed, (i) if such Common Stock is listed or
admitted to unlisted trading privileges on a national securities exchange or
market, on the basis of the last reported sale price regular way on such
exchange or market on the last trading day prior to the date of conversion or
exchange upon which such a sale shall have been effected, or (ii) if such Common
Stock is not at the time so listed or admitted to unlisted trading privileges on
a national securities exchange or market, on the basis of the average of the bid
and asked prices of such Common Stock in the over-the-counter market, on the
last trading day prior to the date of conversion or exchange, as reported by the
National Quotation Bureau, Incorporated or similar organization if the National
Quotation Bureau, Incorporated is no longer reporting such information, or if
not so available, the fair market price as determined by the Board of Directors.
For purposes of this Section, "trading day" shall mean each Monday, Tuesday,
Wednesday, Thursday and Friday other than any day on which the Common Stock is
not traded on the Nasdaq National Market, or if the Common Stock is not traded
on the Nasdaq National Market, on the principal exchange or market on which the
Common Stock is traded or quoted.

SECTION 1404.          ADJUSTMENT OF CONVERSION AND EXCHANGE PRICE.

        The conversion or exchange price of Securities of any series that is
convertible or exchangeable into Common Stock of the Company shall be adjusted
for any stock dividends, stock splits, reclassifications, combinations or
similar transactions in accordance with the terms of the supplemental indenture
or Board Resolutions setting forth the terms of the Securities of such series.

        Whenever the conversion or exchange price is adjusted, the Company shall
compute the adjusted conversion or exchange price in accordance with terms of
the applicable Board Resolution or supplemental indenture and shall prepare an
Officers' Certificate setting forth the adjusted conversion or exchange price
and showing in reasonable detail the facts upon which such adjustment is based,
and such certificate shall forthwith be filed at each office or agency
maintained for the purpose of conversion or exchange of Securities pursuant to
Section 1002 and, if different, with the Trustee. The Company shall forthwith
cause a notice setting forth the adjusted conversion or exchange price to be
mailed, first class postage prepaid, to each Holder of Securities of such series
at its address appearing on the Security Register and to any conversion or
exchange agent other than the Trustee.

SECTION 1405.          NOTICE OF CERTAIN CORPORATE ACTIONS.

        In case:

        (1) the Company shall declare a dividend (or any other distribution) on
its Common Stock payable otherwise than in cash out of its retained earnings
(other than a dividend for which approval of any shareholders of the Company is
required) that would require an adjustment pursuant to Section 1404; or


                                      -69-

<PAGE>   77
        (2) the Company shall authorize the granting to all or substantially all
of 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
(other than any such grant for which approval of any shareholders of the Company
is required); or

        (3) of any reclassification of the Common Stock of the Company (other
than a subdivision or combination of its outstanding shares of Common Stock, or
of any consolidation, merger or share exchange to which the Company is a party
and for which approval of any shareholders of the Company is required), or of
the sale of all or substantially all of the assets of the Company; or

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

then the Company shall cause to be filed with the Trustee, and shall cause to be
mailed to all Holders at their last addresses as they shall appear in the
Security Register, at least 20 days (or 10 days in any case specified in Clause
(1) or (2) above) prior to the applicable record date hereinafter specified, a
notice stating (i) 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 (ii) the date on which such reclassification, consolidation,
merger, share exchange, sale, 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, share exchange, sale, dissolution,
liquidation or winding up. If at any time the Trustee shall not be the
conversion or exchange agent, a copy of such notice shall also forthwith be
filed by the Company with the Trustee.

SECTION 1406.          RESERVATION OF SHARES OF 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 or exchange of Securities, the full number
of shares of Common Stock of the Company then issuable upon the conversion or
exchange of all outstanding Securities of any series that has conversion or
exchange rights.

SECTION 1407.          PAYMENT OF CERTAIN TAXES UPON CONVERSION AND EXCHANGE.

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


                                      -70-

<PAGE>   78
SECTION 1408.      NONASSESSABILITY.

        The Company covenants that all shares of its Common Stock which may be
issued upon conversion or exchange of Securities will upon issue in accordance
with the terms hereof be duly and validly issued and fully paid and
nonassessable.

SECTION 1409.      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 of a series then Outstanding that is convertible or exchangeable
into Common Stock of the Company shall have the right thereafter (which right
shall be the exclusive conversion or exchange right thereafter available to said
Holder), during the period such Security shall be convertible or exchangeable,
to convert or exchange 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
or exchanged 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 (a "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 1409 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 deemed to be the
kind and amount so receivable per share by a plurality of the Non-electing
Shares). 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 or in accordance with the terms of the supplemental indenture or
Board Resolutions setting forth the terms of such adjustments. The above
provisions of this Section 1409 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 of a series that is convertible or exchangeable into
Common Stock of the Company as provided in Section 106 promptly upon such
execution.


                                      -71-

<PAGE>   79
        Neither the Trustee nor any conversion or exchange agent, if any, 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 of a series convertible or exchangeable into Common Stock
of the Company upon the conversion or exchange 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 1410.          DUTIES OF TRUSTEE REGARDING CONVERSION AND EXCHANGE.

        Neither the Trustee nor any conversion or exchange agent shall at any
time be under any duty or responsibility to any Holder of Securities of any
series that is convertible or exchangeable into Common Stock of the Company to
determine whether any facts exist which may require any adjustment of the
conversion or exchange price, or with respect to the nature or extent of any
such adjustment when made, or with respect to the method employed, whether
herein or in any supplemental indenture (or whether any provisions of any
supplemental indenture are correct), any resolutions of the Board of Directors
or written instrument executed by one or more officers of the Company provided
to be employed in making the same. Neither the Trustee nor any conversion or
exchange agent shall be accountable with respect to the validity or value (or
the kind or amount) of any shares of Common Stock of the Company, or of any
securities or property, which may at any time be issued or delivered upon the
conversion or exchange of any Securities and neither the Trustee nor any
conversion or exchange agent makes any representation with respect thereto.
Subject to the provisions of Section 601, neither the Trustee nor any conversion
or exchange agent shall be responsible for any failure of the Company to issue,
transfer or deliver any shares of its Common Stock or stock certificates or
other securities or property upon the surrender of any Security for the purpose
of conversion or exchange or to comply with any of the covenants of the Company
contained in this Article Fourteen or in the applicable supplemental indenture,
resolutions of the Board of Directors or written instrument executed by one or
more duly authorized officers of the Company.

SECTION 1411.          REPAYMENT OF CERTAIN FUNDS UPON CONVERSION AND EXCHANGE.

        Any funds which at any time shall have been deposited by the Company or
on its behalf with the Trustee or any other paying agent for the purpose of
paying the principal of, and premium, if any, and interest, if any, on any of
the Securities (including, but not limited to, funds deposited for the sinking
fund referred to in Article Twelve hereof and funds deposited pursuant to
Article Thirteen hereof) and which shall not be required for such purposes
because of the conversion or exchange of such Securities as provided in this
Article Fourteen shall after such conversion or exchange be repaid to the
Company by the Trustee upon the Company's written request.

        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.


                                      -72-

<PAGE>   80
        IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of the day and year first above written.

                                             SUN MICROSYSTEMS, INC.


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


                                             THE BANK OF NEW YORK, as Trustee


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


                                      -73-





<PAGE>   1
                                                                     Exhibit 4.2

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




                             Sun Microsystems, Inc.

                                       TO


                              The Bank of New York,

                                   as Trustee


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


                                    Indenture

                          Dated as of __________, 1999


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




                          Subordinated Debt Securities


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

<PAGE>   2

                                TABLE OF CONTENTS
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<S>                                                                                                                 <C>
ARTICLE ONE  DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION...................................................1
         SECTION 101.   Definitions....................................................................................1
                  Act .................................................................................................2
                  Affiliate ...........................................................................................2
                  Authenticating Agent.................................................................................2
                  Board of Directors...................................................................................2
                  Board Resolution.....................................................................................2
                  Business Day.........................................................................................2
                  Commission ..........................................................................................2
                  Common Stock.........................................................................................2
                  Company .............................................................................................3
                  Company Request......................................................................................3
                  Company Order........................................................................................3
                  Corporate Trust Office...............................................................................3
                  Covenant Defeasance..................................................................................3
                  Defaulted Interest...................................................................................3
                  Defeasance ..........................................................................................3
                  Depositary ..........................................................................................3
                  Designated Senior Debt...............................................................................3
                  Event of Default.....................................................................................3
                  Exchange Act.........................................................................................3
                  Expiration Date......................................................................................3
                  Global Security......................................................................................3
                  Holder ..............................................................................................4
                  Indenture ...........................................................................................4
                  Interest Payment Date................................................................................4
                  Investment Company Act...............................................................................4
                  Maturity ............................................................................................4
                  Notice of Default....................................................................................4
                  Officers' Certificate................................................................................4
                  Opinion of Counsel...................................................................................5
                  Original Issue Discount Security.....................................................................5
                  Outstanding..........................................................................................5
                  Paying Agent.........................................................................................6
                  Payment Blockage Notice..............................................................................6
                  Person ..............................................................................................6
                  Place of Payment.....................................................................................6
                  Predecessor Security.................................................................................6
                  Record Date..........................................................................................6
                  Redemption Date......................................................................................6

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                  Redemption Price.....................................................................................6
                  Regular Record Date..................................................................................6
                  Representative.......................................................................................6
                  Revolving Credit Agreement...........................................................................6
                  Securities ..........................................................................................7
                  Securities Act.......................................................................................7
                  Security Register....................................................................................7
                  Security Registrar...................................................................................7
                  Senior Debt..........................................................................................7
                  Special Record Date..................................................................................8
                  Stated Maturity......................................................................................8
                  Subsidiary ..........................................................................................8
                  Trust Indenture Act..................................................................................8
                  Trustee    ..........................................................................................8
                  U.S. Government Obligation...........................................................................8
                  Vice President.......................................................................................8
         SECTION 102.  Compliance Certificates and Opinions............................................................8
         SECTION 103.  Form of Documents Delivered to Trustee..........................................................9
         SECTION 104.  Acts of Holders; Record Dates...................................................................9
         SECTION 105.  Notices, Etc., to Trustee and Company..........................................................11
         SECTION 106.  Notice to Holders; Waiver......................................................................12
         SECTION 107.  Conflict with Trust Indenture Act..............................................................12
         SECTION 108.  Effect of Headings and Table of Contents.......................................................12
         SECTION 109.  Successors and Assigns.........................................................................13
         SECTION 110.  Separability Clause............................................................................13
         SECTION 111.  Benefits of Indenture..........................................................................13
         SECTION 112.  Governing Law..................................................................................13
         SECTION 113.  Legal Holidays.................................................................................13
         SECTION 114.  Indenture and Securities Solely Corporate Obligations..........................................13
         SECTION 115.  Indenture May be Executed in Counterparts......................................................14

ARTICLE TWO  SECURITY FORMS...........................................................................................14
         SECTION 201.  Forms Generally................................................................................14
         SECTION 202.  Form of Face of Security.......................................................................15
         SECTION 203.  Form of Reverse of Security....................................................................16
         SECTION 204.  Form of Legend for Global Securities...........................................................21
         SECTION 205.  Form of Trustee's Certificate of Authentication................................................22
         SECTION 206.  Form of Conversion Notice......................................................................22


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                                   (CONTINUED)
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<S>                                                                                                                  <C>
ARTICLE THREE  THE SECURITIES.........................................................................................23
         SECTION 301.  Amount Unlimited; Issuable in Series...........................................................23
         SECTION 302.  Denominations..................................................................................26
         SECTION 303.  Execution, Authentication, Delivery and Dating.................................................26
         SECTION 304.  Temporary Securities...........................................................................27
         SECTION 305.  Registration; Registration of Transfer and Exchange............................................28
         SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities...............................................29
         SECTION 307.  Payment of Interest; Interest Rights Preserved.................................................30
         SECTION 308.  Persons Deemed Owners..........................................................................31
         SECTION 309.  Cancellation...................................................................................32
         SECTION 310.  Computation of Interest........................................................................32
         SECTION 311.  CUSIP Numbers..................................................................................32

ARTICLE FOUR  SATISFACTION AND DISCHARGE..............................................................................33
         SECTION 401.  Satisfaction and Discharge of Indenture........................................................33
         SECTION 402.  Application of Trust Money.....................................................................34

ARTICLE FIVE  REMEDIES................................................................................................34
         SECTION 501.  Events of Default..............................................................................34
         SECTION 502.  Acceleration of Maturity; Rescission and Annulment.............................................35
         SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee ...............................36
         SECTION 504.  Trustee May File Proofs of Claim...............................................................37
         SECTION 505.  Trustee May Enforce Claims Without Possession of Securities....................................37
         SECTION 506.  Application of Money Collected.................................................................37
         SECTION 507.  Limitation on Suits............................................................................38
         SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium and Interest
                       and to Convert.................................................................................38
         SECTION 509.  Restoration of Rights and Remedies.............................................................39
         SECTION 510.  Rights and Remedies Cumulative.................................................................39
         SECTION 511.  Delay or Omission Not Waiver...................................................................39
         SECTION 512.  Control by Holders.............................................................................39
         SECTION 513.  Waiver of Past Defaults........................................................................40
         SECTION 514.  Undertaking for Costs..........................................................................40
         SECTION 515.  Waiver of Usury, Stay or Extension Laws........................................................40

ARTICLE SIX  THE TRUSTEE..............................................................................................41
         SECTION 601.  Certain Duties and Responsibilities............................................................41
         SECTION 602.  Notice of Defaults.............................................................................41
         SECTION 603.  Certain Rights of Trustee......................................................................41

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         SECTION 604.  Not Responsible for Recitals or Issuance of Securities...................................42
         SECTION 605.  May Hold Securities and Act as Trustee Under Other Indentures ...........................43
         SECTION 606.  Money Held in Trust......................................................................43
         SECTION 607.  Compensation and Reimbursement...........................................................43
         SECTION 608.  Conflicting Interests....................................................................44
         SECTION 609.  Corporate Trustee Required; Eligibility..................................................44
         SECTION 610.  Resignation and Removal; Appointment of Successor........................................44
         SECTION 611.  Acceptance of Appointment by Successor...................................................46
         SECTION 612.  Merger, Conversion, Consolidation or Succession to Business..............................47
         SECTION 613.  Preferential Collection of Claims Against Company........................................47
         SECTION 614.  Appointment of Authenticating Agent......................................................47

ARTICLE SEVEN  HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY................................................48
         SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders................................48
         SECTION 702.  Preservation of Information; Communications to Holders...................................49
         SECTION 703.  Reports by Trustee.......................................................................49
         SECTION 704.  Reports by Company.......................................................................50

ARTICLE EIGHT  CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE.............................................50
         SECTION 801.  Company May Consolidate, Etc., Only on Certain Terms.....................................50
         SECTION 802.  Successor Substituted....................................................................51

ARTICLE NINE  SUPPLEMENTAL INDENTURES...........................................................................51
         SECTION 901.  Supplemental Indentures Without Consent of Holders.......................................51
         SECTION 902.  Supplemental Indentures With Consent of Holders..........................................52
         SECTION 903.  Execution of Supplemental Indentures.....................................................53
         SECTION 904.  Effect of Supplemental Indentures........................................................54
         SECTION 905.  Conformity with Trust Indenture Act......................................................54
         SECTION 906.  Reference in Securities to Supplemental Indentures.......................................54
         SECTION 907.  Subordination Unimpaired.................................................................54

ARTICLE TEN  COVENANTS..........................................................................................54
         SECTION 1001. Payment of Principal, Premium and Interest...............................................54
         SECTION 1002. Maintenance of Office or Agency..........................................................54
         SECTION 1003. Money for Securities Payments to Be Held in Trust........................................55
         SECTION 1004. Statement by Officers as to Default......................................................56
         SECTION 1005. Existence................................................................................56
         SECTION 1006. Maintenance of Properties................................................................56
         SECTION 1007. Payment of Taxes and Other Claims........................................................57


                                                          -iv-
</TABLE>

<PAGE>   6


                                TABLE OF CONTENTS
                                   (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                               PAGE
                                                                                                               ----

<S>                                                                                                            <C>
         SECTION 1008.  Waiver of Certain Covenants..............................................................57
         SECTION 1009.  Calculation of Original Issue Discount...................................................57

ARTICLE ELEVEN  REDEMPTION OF SECURITIES.........................................................................57
         SECTION 1101.  Applicability of Article.................................................................57
         SECTION 1102.  Election to Redeem; Notice to Trustee....................................................58
         SECTION 1103.  Selection by Trustee of Securities to Be Redeemed........................................58
         SECTION 1104.  Notice of Redemption.....................................................................59
         SECTION 1105.  Deposit of Redemption Price..............................................................60
         SECTION 1106.  Securities Payable on Redemption Date....................................................60
         SECTION 1107.  Securities Redeemed in Part..............................................................60

ARTICLE TWELVE  SINKING FUNDS....................................................................................61
         SECTION 1201.  Applicability of Article.................................................................61
         SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities....................................61
         SECTION 1203.  Redemption of Securities for Sinking Fund................................................61

ARTICLE THIRTEEN  DEFEASANCE AND COVENANT DEFEASANCE.............................................................62
         SECTION 1301.  Company's Option to Effect Defeasance or Covenant Defeasance ............................62
         SECTION 1302.  Defeasance and Discharge.................................................................62
         SECTION 1303.  Covenant Defeasance......................................................................62
         SECTION 1304.  Conditions to Defeasance or Covenant Defeasance..........................................63
         SECTION 1305.  Deposited Money and U.S. Government Obligations to be Held in Trust;
                        Miscellaneous Provisions.................................................................65
         SECTION 1306.  Reinstatement............................................................................65

ARTICLE FOURTEEN  CONVERSION AND EXCHANGE OF SECURITIES..........................................................66
         SECTION 1401.  Applicability of Article.................................................................66
         SECTION 1402.  Exercise of Conversion and Exchange Privilege............................................66
         SECTION 1403.  No Fractional Shares.....................................................................67
         SECTION 1404.  Adjustment of Conversion and Exchange Price..............................................68
         SECTION 1405.  Notice of Certain Corporate Actions......................................................68
         SECTION 1406.  Reservation of Shares of Common Stock....................................................69
         SECTION 1407.  Payment of Certain Taxes Upon Conversion and Exchange....................................69
         SECTION 1408.  Nonassessability.........................................................................69
         SECTION 1409.  Provision in Case of Consolidation, Merger or Sale of Assets.............................69
         SECTION 1410.  Duties of Trustee Regarding Conversion and Exchange......................................70
         SECTION 1411.  Repayment of Certain Funds Upon Conversion and Exchange .................................71


                                                          -v-
</TABLE>

<PAGE>   7
                                TABLE OF CONTENTS
                                   (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                              PAGE
                                                                                                              ----

<S>                                                                                                          <C>
ARTICLE FIFTEEN  SUBORDINATION OF SECURITIES.....................................................................71
         SECTION 1501.  Securities Subordinate to Senior Debt....................................................71
         SECTION 1502.  Payment Over of Proceeds Upon Dissolution, Etc...........................................72
         SECTION 1503.  Prior Payment to Senior Debt Upon Acceleration of Securities.............................73
         SECTION 1504.  No Payment in Certain Circumstances......................................................74
         SECTION 1505.  Payment Permitted If No Default..........................................................75
         SECTION 1506.  Subrogation to Rights of Holders of Senior Debt..........................................75
         SECTION 1507.  Provisions Solely to Define Relative Rights..............................................76
         SECTION 1508.  Trustee to Effectuate Subordination......................................................76
         SECTION 1509.  No Waiver of Subordination Provisions....................................................76
         SECTION 1510.  Notice to Trustee........................................................................77
         SECTION 1511.  Reliance on Judicial Order or Certificate of Liquidating Agent...........................77
         SECTION 1512.  Trustee Not Fiduciary for Holders of Senior Debt.........................................78
         SECTION 1513.  Rights of Trustee as Holder of Senior Debt; Preservation of Trustee's
                        Rights...................................................................................78
         SECTION 1514.  Article Applicable to Paying Agents......................................................78
         SECTION 1515.  Certain Conversions Deemed Payment.......................................................78
         SECTION 1516.  Obligations of Company and Right to Convert Unconditional................................79
         SECTION 1517.  Reliance by Holders of Senior Indebtedness on Subordination Provisions ..................79


                                                          -vi-
</TABLE>

<PAGE>   8
                             SUN MICROSYSTEMS, INC.

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


<TABLE>
<CAPTION>

   Trust Indenture                                                  Indenture
     Act Section                                                     Section
- -----------------------                                          ---------------
<S>                                                              <C>
    Section 310(a)(1) ...........................................609
               (a)(2) ...........................................609
               (a)(3) ...........................................Not Applicable
               (a)(4) ...........................................Not Applicable
               (b)    ...........................................608, 610
    Section 311(a)    ...........................................613
               (b)    ...........................................613
    Section 312(a)    ...........................................701, 702
               (b)    ...........................................702
               (c)    ...........................................702
    Section 313(a)    ...........................................703
               (b)    ...........................................703
               (c)    ...........................................703
               (d)    ...........................................703
    Section 314(a)    ...........................................704
               (a)(4) ...........................................101, 1004
               (b)    ...........................................Not Applicable
               (c)(1) ...........................................102
               (c)(2) ...........................................102
               (c)(3) ...........................................Not Applicable
               (d)    ...........................................Not Applicable
               (e)    ...........................................102
    Section 315(a)    ...........................................601
               (b)    ...........................................602
               (c)    ...........................................601
               (d)    ...........................................601
               (e)    ...........................................514
    Section 316(a)    ...........................................101
               (a)(1)(A) ........................................502, 512
               (a)(1)(B) ........................................513
               (a)(2) ...........................................Not Applicable
               (b)    ...........................................508
               (c)    ...........................................104
    Section 317(a)(1) ...........................................503
               (a)(2) ...........................................504
               (b)    ...........................................1003
    Section 318(a)    ...........................................107
</TABLE>

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

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

                                      -vii-

<PAGE>   9
         INDENTURE, dated as of _______________, 1999, between Sun Microsystems,
Inc., a corporation duly organized and existing under the laws of the State of
Delaware (herein called the "Company"), having its principal executive office at
901 San Antonio Road, Palo Alto, California 94303 and The Bank of New York,
N.A., a New York banking corporation, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

         The Company has duly authorized the execution and delivery of this
Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called the
"Securities"), to be issued in one or more series as provided in this Indenture.

         All things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, have been done.

                   NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.      DEFINITIONS.

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

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

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

         (3) all accounting terms not otherwise defined herein have the meanings
assigned to them in accordance with generally accepted accounting principles,
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;

         (4) unless the context otherwise requires, any reference to an
"Article" or a "Section" refers to an Article or a Section, as the case may be,
of this Indenture; and



<PAGE>   10
         (5) 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, has the meaning specified
in Section 104.

         "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.

         "Authenticating Agent" means any Person authorized by the Trustee
pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities of one or more series.

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

         "Business Day," when used with respect to any Place of Payment, means
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which
banking institutions in that Place of Payment are authorized or obligated by law
or executive order to close.

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

         "Common Stock" includes any stock of any class of the Company 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 Company
and which is not subject to redemption by the Company; provided, however,
subject to the provisions of Section 1409, shares issuable upon conversion of
Securities shall include only shares of the class designated as Common Stock of
the Company at the date of this Indenture or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
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 Company
and which are not subject to redemption by the Company; provided, further, that
if at any time there shall be more than one such resulting class, 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.

                                       -2-

<PAGE>   11
         "Company" means the corporation named as the "Company" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Company" shall mean such successor Person.

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

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

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

         "Covenant Defeasance" has the meaning specified in Section 1303.

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

         "Defeasance" has the meaning specified in Section 1302.

         "Depositary" means, with respect to Securities of any series issuable
in whole or in part in the form of one or more Global Securities, a clearing
agency registered under the Exchange Act that is designated to act as Depositary
for such Securities as contemplated by Section 301.

         "Designated Senior Debt" means the Company's obligations under the
Revolving Credit Agreement and the Company's obligations under any particular
Senior Debt in which the instrument creating or evidencing the same or the
assumption or guarantee thereof (or related agreements or documents to which the
Company is a party) expressly provides that such Senior Debt shall be
"Designated Senior Debt" for purposes of this Indenture (provided that such
instrument, agreement or other document may place limitations and conditions on
the right of such Senior Debt to exercise the rights of Designated Senior Debt).

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

         "Exchange Act" means the Securities Exchange Act of 1934 and any
statute successor thereto, in each case as amended from time to time.

         "Expiration Date" has the meaning specified in Section 104.

         "Global Security" means a Security that evidences all or part of the
Securities of any series and bears the legend set forth in Section 204 (or such
legend as may be specified as contemplated by Section 301 for such Securities).

                                       -3-

<PAGE>   12

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

         "Indenture" means this instrument as originally executed and as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
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. The term "Indenture" shall also include the terms of particular
series of Securities established as contemplated by Section 301; provided,
however, that if at any time more than one Person is acting as Trustee under
this Indenture due to the appointment of one or more separate Trustees for any
one or more separate series of Securities, "Indenture" shall mean, with respect
to such series of Securities for which any such Person is Trustee, 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 and shall include the terms of particular
series of Securities for which such Person is Trustee established as
contemplated by Section 301, exclusive, however, of any provisions or terms
which relate solely to other series of Securities for which such Person is not
Trustee, regardless of when such terms or provisions were adopted, and exclusive
of any provisions or terms adopted by means of one or more indentures
supplemental hereto executed and delivered after such person had become such
Trustee, but to which such person, as such Trustee, was not a party; provided,
further that in the event that this Indenture is supplemented or amended by one
or more indentures supplemental hereto which are only applicable to certain
series of Securities, the term "Indenture" for a particular series of Securities
shall only include the supplemental indentures applicable thereto.

         "Interest," when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, means interest
payable after Maturity.

         "Interest Payment Date," when used with respect to any Security, means
the Stated Maturity of an instalment of interest on such Security.

         "Investment Company Act" means the Investment Company Act of 1940 and
any statute successor thereto, in each case as amended from time to time.

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

         "Notice of Default" means a written notice of the kind specified in
Section 501(4).

         "Officers' Certificate" means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, 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. One of the officers signing an Officers' Certificate given pursuant to
Section 1004 shall be the principal executive, financial or accounting officer
of the Company.

                                      -4-
<PAGE>   13

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

         "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

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

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

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

         (3) Securities as to which Defeasance has been effected pursuant to
Section 1302; and

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

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given, made or taken any
request, demand, authorization, direction, notice, consent, waiver or other
action hereunder as of any date, (A) the principal amount of an Original Issue
Discount Security which shall be deemed to be Outstanding shall be the amount of
the principal thereof which would be due and payable as of such date upon
acceleration of the Maturity thereof to such date pursuant to Section 502, (B)
if, as of such date, the principal amount payable at the Stated Maturity of a
Security is not determinable, the principal amount of such Security which shall
be deemed to be Outstanding shall be the amount as specified or determined as
contemplated by Section 301, (C) the principal amount of a Security denominated
in one or more foreign currencies or currency units which shall be deemed to be
Outstanding shall be the U.S. dollar equivalent, determined as of such date in
the manner provided as contemplated by Section 301, of the principal amount of
such Security (or, in the case of a Security described in Clause (A) or (B)
above, of the amount determined as provided in such Clause), and (D) Securities
owned by the Company or any other obligor upon the Securities or any Affiliate
of the Company or of such other obligor shall be disregarded and deemed not to
be Outstanding, except that, in determining whether the Trustee shall be
protected in relying upon any such request, demand, authorization, direction,
notice, consent, waiver or other action, only Securities which a responsible
officer of the Trustee actually knows to be so owned shall be so disregarded.
Securities so


                                      -5-
<PAGE>   14
owned which have been pledged in good faith may be regarded as Outstanding if
the pledgee establishes to the satisfaction of the Trustee the pledgee's right
so to act with respect to such Securities and that the pledgee is not the
Company or any other obligor upon the Securities or any Affiliate of the Company
or of such other obligor.

         "Paying Agent" means any Person authorized by the Company to pay the
principal of or any premium or interest on any Securities on behalf of the
Company.

         "Payment Blockage Notice" has the meaning specified in Section 1504.

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

         "Place of Payment," when used with respect to the Securities of any
series, means the place or places where the principal of and any premium and
interest on the Securities of that series are payable as specified as
contemplated by Section 301.

         "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for 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.

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

         "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.

         "Regular Record Date" for the interest payable on any Interest Payment
Date on the Securities of any series means the date specified for that purpose
as contemplated by Section 301.

         "Representative" means the (a) indenture trustee or other trustee,
agent or representative for any Senior Debt or (b) with respect to any Senior
Debt that does not have any such trustee, agent or other representative, (i) in
the case of such Senior Debt issued pursuant to an agreement providing for
voting arrangements as among the holders or owners of such Senior Debt, any
holder or owner of such Senior Debt acting with the consent of the required
persons necessary to bind such holders or owners of such Senior Debt and (ii) in
the case of all other such Senior Debt, the holder or owner of such Senior Debt.

         "Revolving Credit Agreement" means that certain Restated Revolving
Credit Agreement, dated as of August 27, 1997, by and between Company, the
financial institutions named on the signature pages



                                      -6-
<PAGE>   15

thereto (the "Bank) and Citicorp N.A., as agent for the Banks, as amended,
restated, supplemented or otherwise modified from time to time.

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

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

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

         "Senior Debt" means the principal of (and premium, if any) and
interest, if any (including interest accruing on or after the filing of any
petition in bankruptcy or for reorganization relating to the Company to the
extent that such claim for post-petition interest is allowed in such
proceeding), on, rent with respect to, 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 this Indenture or
thereafter created, incurred or assumed: (a) indebtedness of the Company
evidenced by credit or loan agreement, note, bond, debenture or other written
obligation, (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 (i) as lessee under leases required to be
capitalized on the balance sheet of the lessee under generally accepted
accounting principles, (ii) as lessee under other leases for facilities,
equipment or related assets, whether or not capitalized, entered into or leased
after the date of this Indenture for financing purposes (as determined by the
Company) or (iii) under any lease or related document (including a purchase
agreement) that provides that the Company is contractually obligated to purchase
or cause a third party to purchase the leased property and the obligations of
the Company under such lease or related document to purchase or to cause a third
party to purchase such leased property, (e) all obligations of the Company under
interest rate and currency swaps, caps, floors, collars, hedge agreements,
forward contracts, or similar agreements or arrangements, (f) all obligations of
the Company with respect to letters of credit, bankers' acceptances or similar
facilities (including reimbursement obligations with respect to any of the
foregoing), (g) all obligations of the Company issued or assumed as the deferred
purchase price of property or services (but excluding trade accounts payable
arising in the ordinary course of business), (h) all obligations of the type
referred to in clauses (a) through (g) above of another Person and all dividends
of another Person, the payment of which, in either case, the Company has assumed
or guaranteed (or in effect guaranteed through an agreement to purchase or
otherwise (including, without limitation, "take or pay" and similar
arrangements)), 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 lien on property of the Company, and all obligations of the
Company with respect thereto, and (i) 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 (h) of this paragraph; provided, however, that Senior Debt shall not
include the Securities or any such indebtedness or obligation if the terms of
such indebtedness or obligation (or the



                                      -7-
<PAGE>   16

terms of the instrument under which, or pursuant to which it is issued)
expressly provide that such indebtedness or obligation is not superior in right
of payment to the Securities.

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

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

         "Subsidiary" means a corporation of which at least 66 2/3% of the
outstanding voting stock of such corporation is at the time owned, directly or
indirectly, by the Company or by one or more other Subsidiaries, or by the
Company and one or more other Subsidiaries, and the accounts of which are
consolidated with those of the Company in its most recent consolidated financial
statements in accordance with generally accepted accounting principles. For the
purposes of this definition, "voting stock" means stock which ordinarily has
voting power for the election of directors, whether at all times or only so long
as no senior class of stock has such voting power by reason of any contingency.

         "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 or include each Person who is then a Trustee hereunder, and
if at any time there is more than one such Person, "Trustee" as used with
respect to the Securities of any series shall mean the Trustee with respect to
Securities of that series.

         "U.S. Government Obligation" has the meaning specified in Section 1304.

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

SECTION 102.      COMPLIANCE CERTIFICATES AND OPINIONS.

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

                                      -8-
<PAGE>   17

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

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

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

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

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

SECTION 103.      FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

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

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

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

SECTION 104.      ACTS OF HOLDERS; RECORD DATES.

         Any request, demand, authorization, direction, notice, consent, waiver
or other action provided or permitted by this Indenture to be given, made or
taken by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agent



                                      -9-
<PAGE>   18

duly appointed in writing; and, except as herein otherwise expressly provided,
such action shall become effective when such instrument or instruments are
delivered to the Trustee and, where it is hereby expressly required, to the
Company. The Trustee shall promptly deliver to the Company copies of all such
instrument or instruments and records delivered to the Trustee. Such instrument
or instruments (and the action embodied therein and evidenced thereby) are
herein sometimes referred to as the "Act" of the Holders signing such instrument
or instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose of this Indenture
and (subject to Section 601) conclusive in favor of the Trustee and the Company,
if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing 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 or her the execution thereof. Where such
execution is by a signer acting in a capacity other than his or her individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his or her authority. The fact and date of the execution of any such
instrument or writing, or the authority of the Person executing the same, may
also be proved in any other manner which the Trustee deems sufficient.

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

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

         The Company may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities of any series entitled to
give, make or take any request, demand, authorization, direction, vote, notice,
consent, waiver or other action provided or permitted by this Indenture to be
given, made or taken by Holders of Securities of such series, provided that the
Company may not set a record date for, and the provisions of this paragraph
shall not apply with respect to, the giving or making of any notice,
declaration, request or direction referred to in the next paragraph. If any
record date is set pursuant to this paragraph, the Holders of Outstanding
Securities of the relevant series on such record date, and no other Holders,
shall be entitled to take the relevant action, whether or not such Holders
remain Holders after such record date; provided that no such action shall be
effective hereunder unless taken on or prior to the applicable Expiration Date
by Holders of the requisite principal amount of Outstanding Securities of such
series on such record date. Nothing in this paragraph shall be construed to
prevent the Company from setting a new record date for any action for which a
record date has previously been set pursuant to this paragraph (whereupon the
record date previously set shall automatically and with no action by any Person
be canceled and of no effect), and nothing in this paragraph shall be construed
to render ineffective any action taken by Holders of the requisite principal
amount of Outstanding Securities of the relevant series on the date such action
is taken. Promptly after any record date is set pursuant to this paragraph, the
Company, at its own expense, shall cause notice of



                                      -10-
<PAGE>   19

such record date, the proposed action by Holders and the applicable Expiration
Date to be given to the Trustee in writing and to each Holder of Securities of
the relevant series in the manner set forth in Section 106.

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

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

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

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

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



                                      -11-
<PAGE>   20

         (1) the Trustee by any Holder or by the Company shall be sufficient for
every purpose hereunder if made, given, furnished or filed in writing (or by
facsimile transmission ((212) 815-5915), provided that oral confirmation of
receipt shall have been received) to or with the Trustee at its Corporate Trust
Office, Attention: Corporate Trust, Trustee Administration, or

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

SECTION 106.      NOTICE TO HOLDERS; WAIVER.

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

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

SECTION 107.      CONFLICT WITH TRUST INDENTURE ACT.

         If any provision hereof limits, qualifies or conflicts with a provision
of the Trust Indenture Act which 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
which may be so modified or excluded, the latter provision shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.

SECTION 108.      EFFECT OF HEADINGS AND TABLE OF CONTENTS.

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

                                      -12-
<PAGE>   21

SECTION 109.      SUCCESSORS AND ASSIGNS.

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

SECTION 110.      SEPARABILITY CLAUSE.

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

SECTION 111.      BENEFITS OF INDENTURE.

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

SECTION 112.      GOVERNING LAW.

         THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS OF
LAWS PRINCIPLES THEREOF.

SECTION 113.      LEGAL HOLIDAYS.

         In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security or the last date on which a Holder has the right to
convert a Security at a particular conversion price shall not be a Business Day
at any Place of Payment, then (notwithstanding any other provision of this
Indenture or of the Securities (other than a provision of any Security which
specifically states that such provision shall apply in lieu of this Section))
payment of interest or principal (and premium, if any) or, if applicable to a
particular series of Securities, conversion need not be made at such Place of
Payment on such date, but may be made on the next succeeding Business Day at
such Place of Payment with the same force and effect as if made on the Interest
Payment Date or Redemption Date, at the Stated Maturity or on such last day for
conversion, as the case may be.

SECTION 114.      INDENTURE AND SECURITIES SOLELY CORPORATE OBLIGATIONS.

         No recourse for the payment of the principal of or premium, if any, or
interest on any Security, or for any claim based thereon or otherwise in respect
thereof, and no recourse under or upon any obligation, covenant or agreement of
the Company in this Indenture or in any supplemental indenture or in any
Security, or because of the creation of any indebtedness represented thereby,
shall be had against any incorporator, stockholder, employee, agent, officer, or
director or subsidiary, as such, past, present or future, of the Company or of
any successor corporation, either directly or through the Company or any
successor corporation, whether by virtue of any constitution, statute or rule of
law, or by the



                                      -13-
<PAGE>   22

enforcement of any assessment or penalty or otherwise; it being expressly
understood that all such liability is hereby expressly waived and released as a
condition of, and as a consideration for, the execution of this Indenture and
the issue of the Securities.

SECTION 115.      INDENTURE MAY BE EXECUTED IN COUNTERPARTS.

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

                                   ARTICLE TWO

                                 SECURITY FORMS

SECTION 201.      FORMS GENERALLY.

         The Securities of each series shall be in substantially the form set
forth in this Article, or in such other form as shall be established by or
pursuant to a Board Resolution or in one or more indentures supplemental hereto,
in each case with such appropriate insertions, omissions, substitutions and
other variations as are required or permitted by this Indenture, and may have
such letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange or Depositary therefor or as may, consistently herewith, be
determined by the officers executing such Securities, as evidenced by their
execution thereof. If the form of Securities of any series is established by
action taken pursuant to a Board Resolution, a copy of an appropriate record of
such action shall be certified by the Secretary or an Assistant Secretary of the
Company and delivered to the Trustee at or prior to the delivery of the Company
Order contemplated by Section 303 for the authentication and delivery of such
Securities. Any such Board Resolution or record of such action shall have
attached thereto a true and correct copy of the form of Security referred to
therein approved by or pursuant to such Board Resolution.

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



                                      -14-
<PAGE>   23



SECTION 202.      FORM OF FACE OF SECURITY.

          [INSERT ANY LEGEND REQUIRED BY THE INTERNAL REVENUE CODE AND
                          THE REGULATIONS THEREUNDER.]

                             SUN MICROSYSTEMS, INC.

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

No. _________                                                    $_____________
CUSIP No.____

         Sun Microsystems, Inc., a corporation duly organized and existing under
the laws of Delaware (herein called the "Company," which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to ________________________, or registered
assigns, the principal sum of ____________________ Dollars on ________________
[IF THE SECURITY IS TO BEAR INTEREST PRIOR TO MATURITY, INSERT -- , and to pay
interest thereon from _________ or from the most recent Interest Payment Date to
which interest has been paid or duly provided for, semi-annually on _________
and _________ in each year, commencing _________, at the rate of ___% per annum,
until the principal hereof is paid or made available for payment [IF APPLICABLE,
INSERT -- , provided that any principal and premium, and any such instalment of
interest, which is overdue shall bear interest at the rate of ___% per annum (to
the extent that the payment of such interest shall be legally enforceable), from
the dates such amounts are due until they are paid or made available for
payment, and such interest shall be payable on demand]. The interest so payable,
and punctually paid or duly provided for, on any Interest Payment Date will, as
provided in such Indenture, be paid to the Person in whose name this Security
(or one or more Predecessor Securities) is registered at the close of business
on the Regular Record Date for such interest, which shall be the ______ or
_______ (whether or not a Business Day), as the case may be, next preceding such
Interest Payment Date. Any such interest not so punctually paid or duly provided
for will forthwith cease to be payable to the Holder on such Regular Record Date
and may either be paid to the Person in whose name this Security (or one or more
Predecessor Securities) is registered at the close of business on a Special
Record Date for the payment of such Defaulted Interest to be fixed by the
Trustee, notice whereof shall be given to Holders of Securities of this series
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 of this series may be listed, and
upon such notice as may be required by such exchange, all as more fully provided
in said Indenture. Interest on the Security shall be computed on the basis of a
360 day year of twelve 30 day months.]

         [IF THE SECURITY IS NOT TO BEAR INTEREST PRIOR TO MATURITY, INSERT --
The principal of this Security shall not bear interest except in the case of a
default in payment of principal upon acceleration, upon redemption or at Stated
Maturity and in such case the overdue principal and any overdue premium shall
bear interest at the rate of ___% per annum (to the extent that the payment of
such interest shall be legally enforceable), from the dates such amounts are due
until they are paid or made available for payment. Interest on any overdue
principal or premium shall be payable on demand. Any such interest on overdue
principal or premium which is not paid on demand shall bear interest at the rate
of ___% per annum (to the extent that the payment of such interest on interest
shall be legally enforceable), from the



                                      -15-
<PAGE>   24

date of such demand until the amount so demanded is paid or made available for
payment. Interest on any overdue interest shall be payable on demand.]

         Payment of the principal of (and premium, if any) and [IF APPLICABLE,
INSERT -- any such] interest on this Security will be made at the office or
agency of the Company maintained for that purpose in _________, [IF APPLICABLE,
INSERT -- which shall initially be the [principal corporate trust] office of the
Trustee,] in such coin or currency of the United States of America as at the
time of payment is legal tender for payment of public and private debts [IF
APPLICABLE, INSERT -- ; provided, however, that at the option of the Company
payment of interest may be made by check mailed to the address of the Person
entitled thereto as such address shall appear in the Security Register].

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

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

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

                                      SUN MICROSYSTEMS, INC.


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

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

SECTION 203.      FORM OF REVERSE OF SECURITY.

         This Security is one of a duly authorized issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series under an Indenture, dated as of ____________, 1999 (herein called the
"Indenture," which term shall have the meaning assigned to it in such
instrument), between the Company and The Bank of New York, as Trustee (herein
called the "Trustee," which term includes any successor trustee under the
Indenture), and reference is hereby made to the Indenture and all indentures
supplemental thereto for a statement of the respective rights, limitations of
rights, duties and immunities thereunder of the Company, the Trustee, the
holders of Senior Debt and the Holders of the Securities and of the terms upon
which the Securities are, and are to be, authenticated and delivered. This
Security is one of the series designated on the face hereof [IF APPLICABLE,
INSERT -- , limited in aggregate principal amount to $_________].

         [IF APPLICABLE, INSERT -- The Securities of this series are subject to
redemption upon not less than [IF APPLICABLE, INSERT -- 30] days' notice by
mail, [IF APPLICABLE, INSERT -- (1) on _________ in any year



                                      -16-
<PAGE>   25

commencing with the year _____ and ending with the year _____ through operation
of the sinking fund for this series at a Redemption Price equal to 100% of the
principal amount, and (2)] at any time [IF APPLICABLE, INSERT -- on or after
_________, 19__], as a whole or in part, at the election of the Company, at the
following Redemption Prices (expressed as percentages of the principal amount):
If redeemed [IF APPLICABLE, INSERT -- on or before _________, ___%, and if
redeemed] during the 12-month period beginning ________ of the years indicated,
and thereafter at a Redemption Price equal to .....% of the principal amount,
together in the case of any such redemption [IF APPLICABLE, INSERT -- (whether
through operation of the sinking fund or otherwise)] with accrued interest to
the Redemption Date, but interest installments whose Stated Maturity is on or
prior to such Redemption Date will be payable to the Holders of such Securities,
or one or more Predecessor Securities, of record at the close of business on the
relevant Record Dates referred to on the face hereof, all as provided in the
Indenture.]

<TABLE>
<CAPTION>

                        REDEMPTION                              REDEMPTION
       YEAR                PRICE                       YEAR        PRICE
       ----                -----                       ----        -----
<S>                     <C>                            <C>       <C>
</TABLE>


        [IF APPLICABLE, INSERT -- The Securities of this series are subject to
redemption upon not less than [IF APPLICABLE, INSERT -- 30] days' notice by
mail, (1) on _________ in any year commencing with the year _____ and ending
with the year _____ through operation of the sinking fund for this series at the
Redemption Prices for redemption through operation of the sinking fund
(expressed as percentages of the principal amount) set forth in the table below,
and (2) at any time [IF APPLICABLE, INSERT -- on or after __________], as a
whole or in part, at the election of the Company, at the Redemption Prices for
redemption otherwise than through operation of the sinking fund (expressed as
percentages of the principal amount) set forth in the table below: If redeemed
during the 12-month period beginning ________ of the years indicated,


<TABLE>
<CAPTION>

                         REDEMPTION PRICE FOR        REDEMPTION PRICE FOR
                          REDEMPTION-THROUGH         REDEMPTION-OTHERWISE
                          OPERATION OF THE          THAN THROUGH OPERATION
       YEAR                 SINKING FUND              OF THE SINKING FUND
- -------------------   -----------------------       ------------------------
<S>                   <C>                           <C>
</TABLE>




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

        [IF APPLICABLE, INSERT -- Notwithstanding the foregoing, the Company may
not, prior to __________, redeem any Securities of this series as contemplated
by [IF APPLICABLE, INSERT -- Clause (2)



                                      -17-
<PAGE>   26

of] the preceding paragraph as a part of, or in anticipation of, any refunding
operation by the application, directly or indirectly, of moneys borrowed having
an interest cost to the Company (calculated in accordance with generally
accepted financial practice) of less than ___% per annum.]

        [IF APPLICABLE, INSERT -- The sinking fund for this series provides for
the redemption on _________, in each year beginning with the year _____ and
ending with the year _____ of [IF APPLICABLE, INSERT -- not less than $_______
("mandatory sinking fund") and not more than] $_______ aggregate principal
amount of Securities of this series. Securities of this series acquired or
redeemed by the Company otherwise than through [IF APPLICABLE, INSERT --
mandatory] sinking fund payments may be credited against subsequent [if
applicable, insert -- mandatory] sinking fund payments otherwise required to be
made [IF APPLICABLE, INSERT -- , in the inverse order in which they become
due].]

        [IF THE SECURITY IS SUBJECT TO REDEMPTION OF ANY KIND, INSERT -- In the
event of redemption of this Security in part only, a new Security or Securities
of this series and of like tenor for the unredeemed portion hereof will be
issued in the name of the Holder hereof upon the cancellation hereof.]

        [IF APPLICABLE, INSERT -- The Indenture contains provisions for
defeasance at any time of [the entire indebtedness of this Security] [or]
[certain restrictive covenants and Events of Default with respect to this
Security] [, in each case] upon compliance with certain conditions set forth in
the Indenture.]

        [IF THE SECURITY IS CONVERTIBLE INTO COMMON STOCK OF THE COMPANY, INSERT
- -- Subject to the provisions of the Indenture, the Holder of this Security is
entitled, at its option, at any time on or prior to Maturity (except that, in
case this Security or any portion hereof shall be called for redemption, such
right shall terminate with respect to this Security or portion hereof, as the
case may be, so called for redemption at the close of business on the first
Business Day next preceding the date fixed for redemption as provided in the
Indenture unless the Company defaults in making the payment due upon
redemption), to convert the principal amount of this Security (or any portion
hereof which is $1,000 or an integral multiple thereof), into fully paid and
non-assessable shares (calculated as to each conversion to the nearest 1/100th
of a share) of the Common Stock of the Company, as said shares shall be
constituted at the date of conversion, at the conversion price of $______
principal amount of Securities for each share of Common Stock, or at the
adjusted conversion price in effect at the date of conversion determined as
provided in the Indenture, upon surrender of this Security, together with the
conversion notice hereon duly executed, to the Company at the designated office
or agency of the Company in ____________, accompanied (if so required by the
Company) by instruments of transfer, in form satisfactory to the Company and to
the Trustee, duly executed by the Holder or by its duly authorized attorney in
writing. Such surrender shall, if made during any period beginning at the close
of business on a Regular Record Date and ending at the opening of business on
the Interest Payment Date next following such Regular Record Date (unless this
Security or the portion being converted shall have been called for redemption on
a Redemption Date during the period beginning at the close of business on a
Regular Record Date and ending at the opening of business on the first Business
Day after the next succeeding Interest Payment Date, or if such Interest Payment
Date is not a Business Day, the second such Business Day), also be accompanied
by payment in 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. Subject to the aforesaid requirement for payment and, in
the case of a conversion after the Regular Record Date



                                      -18-
<PAGE>   27
next preceding any Interest Payment Date and on or before such Interest Payment
Date, to the right of the Holder of this Security (or any Predecessor Security)
of record at such Regular Record Date to receive an installment of interest
(with certain exceptions provided in the Indenture), no adjustment is to be made
on conversion for interest accrued hereon or for dividends on shares of Common
Stock issued on conversion. The Company is not required to issue fractional
shares upon any such conversion, but shall make adjustment therefor in cash on
the basis of the current market value of such fractional interest 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 sale of
substantially all of the 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 the consolidation, merger or
sale by a holder of the number of shares of Common Stock into which this
Security might have been converted immediately prior to such consolidation,
merger or sale (assuming such holder of Common Stock 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). In the event of conversion of this
Security in part only, a new Security or Securities for the unconverted portion
hereof shall be issued in the name of the Holder hereof upon the cancellation
hereof.]

         [IF THE SECURITY IS CONVERTIBLE INTO OTHER SECURITIES OF THE COMPANY,
SPECIFY THE CONVERSION FEATURES.]

        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 to appropriate to effectuate the
subordination so provided and (c) appoints the Trustee his attorney-in-fact for
any and all such purposes.

        [IF THE SECURITY IS NOT AN ORIGINAL ISSUE DISCOUNT SECURITY, INSERT --
If an Event of Default with respect to Securities of this series shall occur and
be continuing, the principal of the Securities of this series may be declared
due and payable in the manner and with the effect provided in the Indenture.]

        [IF THE SECURITY IS AN ORIGINAL ISSUE DISCOUNT SECURITY, INSERT -- If an
Event of Default with respect to Securities of this series shall occur and be
continuing, an amount of principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the
Indenture. Such amount shall be equal to --INSERT FORMULA FOR DETERMINING THE
AMOUNT. Upon payment (i) of the amount of principal so declared due and payable
and (ii) of interest on any overdue principal, premium and interest (in each
case to the extent that the payment of such interest shall be legally
enforceable), all of the Company's obligations in respect of the payment of the
principal of and premium and interest, if any, on the Securities of this series
shall terminate.]

                                      -19-
<PAGE>   28

        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 of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of more than 50% in principal amount of the Securities at
the time Outstanding of each series to be affected. The Indenture also contains
provisions permitting the Holders of specified percentages in principal amount
of the Securities of each series at the time Outstanding, on behalf of the
Holders of all Securities of such series, to waive compliance by the Company
with certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer hereof or in exchange herefor or in lieu hereof, whether or not
notation of such consent or waiver is made upon this Security.

        As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default with respect to the
Securities of this series, the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding 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
Securities of this series at the time 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 or any premium or interest hereon
on or after the respective due dates expressed herein.

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

        As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company in any place where the principal of and any
premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or its
attorney duly authorized in writing, and thereupon one or more new Securities of
this series and of like tenor, of authorized denominations and for the same
aggregate principal amount, will be issued to the designated transferee or
transferees.

        The Securities of this series are issuable only in registered form
without coupons in denominations of $[1,000] and any integral multiple thereof.
As provided in the Indenture and subject to certain limitations therein set
forth, Securities of this series are exchangeable for a like aggregate principal


                                      -20-
<PAGE>   29

amount of Securities of this series and of like tenor of a different authorized
denomination, as requested by the Holder surrendering the same.

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

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

        The Security shall be deemed to be a contract made under the laws of the
State of New York, and for all purposes shall be construed in accordance with
and governed by the laws of said State, without regard to conflict of laws
principles thereof.

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

SECTION 204.      FORM OF LEGEND FOR GLOBAL SECURITIES.

        Unless otherwise specified as contemplated by Section 301 for the
Securities evidenced thereby, every Global Security authenticated and delivered
hereunder shall bear a legend in substantially the following form:

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


                                      -21-
<PAGE>   30

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

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

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

Dated:

                                 THE BANK OF NEW YORK,
                                 As Trustee


                                 By:
                                     ----------------------------------------
                                      Authorized Signatory

SECTION 206.      FORM OF CONVERSION NOTICE.

        Conversion notices shall be in substantially the following form:

        To Sun Microsystems, Inc.:

        The undersigned owner of this Security hereby irrevocably exercises the
option to convert this Security, or portion hereof (which is $[1,000] or an
integral multiple thereof) below designated, into shares of Common Stock of the
Company in accordance with the terms of the Indenture referred to in this
Security, and directs that the shares issuable and deliverable upon the
conversion, together with any check in payment for fractional shares and any
Securities representing any unconverted principal amount hereof, be issued and
delivered to the registered holder hereof unless a different name has been
indicated below. If this Notice is being delivered on a date after the close of
business on a Regular Record Date and prior to the opening of business on the
related Interest Payment Date (unless this Security or the portion thereof being
converted has been called for redemption on a Redemption Date during the period
beginning at the close of business on a Regular Record Date and ending at the
opening of business on the first Business Day after the next succeeding Interest
Payment Date, or if such Interest Payment Date is not a Business Day, the second
such Business Day), this Notice is accompanied by payment, in funds acceptable
to the Company, of an amount equal to the interest payable on such Interest
Payment Date of the principal of this Security to be converted. If shares are to
be issued in the name of a person other than the undersigned, the undersigned
will pay all transfer taxes payable with respect hereto. Any amount required to
be paid by the undersigned on account of interest accompanies this Security.


                                      -22-

<PAGE>   31

         Principal Amount to be Converted
(in an integral multiple of $1,000, if less than all)
                 U.S. $ _________

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

                                    --------------------------------------------
                                    Signature(s) must be guaranteed if shares of
                                    Common Stock are to be delivered, or
                                    Securities to be issued, other than to and
                                    in the name of the registered owner.

                                    --------------------------------------------
                                    Signature Guaranty

         Fill in for registration of shares of Common Stock and Security if to
be issued otherwise than to the registered Holder.


<TABLE>
<S>                                                                      <C>
- ------------------------------------------------                         ----------------------------------------------
(Name)                                                                   Social Security or Other Taxpayer
                                                                         Identification Number

- ------------------------------------------------
(Address)


- ------------------------------------------------
Please print Name and Address
(including zip code number)
</TABLE>

[The above conversion notice is to be modified, as appropriate, for conversion
into other securities or property of the Company.]


                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.      AMOUNT UNLIMITED; ISSUABLE IN SERIES.

        The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is unlimited.

        The Securities may be issued in one or more series. There shall be
established in or pursuant to a Board Resolution and, subject to Section 303,
set forth, or determined in the manner provided, in an Officers' Certificate, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series,

        (1) the title of the Securities of the series (which shall distinguish
the Securities of the series from Securities of any other series);


                                      -23-
<PAGE>   32

        (2) any limit upon the aggregate principal amount of the Securities of
the series which may be authenticated and delivered under this Indenture (except
for Securities authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other Securities of the series pursuant to
Section 304, 305, 306, 906 or 1107 and except for any Securities which, pursuant
to Section 303, are deemed never to have been authenticated and delivered
hereunder);

        (3) the Person to whom any interest on a Security of the series shall be
payable, if other than 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;

        (4) the date or dates on which the principal of any Securities of the
series is payable;

        (5) the rate or rates at which any Securities of the series shall bear
interest, if any, the date or dates from which any such interest shall accrue,
the Interest Payment Dates on which any such interest shall be payable and the
Regular Record Date for any such interest payable on any Interest Payment Date;

        (6) the place or places where the principal of and any premium and
interest on any Securities of the series shall be payable;

        (7) the period or periods within which, the price or prices at which and
the terms and conditions upon which any Securities of the series may be
redeemed, in whole or in part, at the option of the Company and, if other than
by a Board Resolution, the manner in which any election by the Company to redeem
the Securities shall be evidenced;

        (8) the obligation, if any, of the Company to redeem or purchase any
Securities of the series pursuant to any sinking fund or analogous provisions or
at the option of the Holder thereof and the period or periods within which, the
price or prices at which and the terms and conditions upon which any Securities
of the series shall be redeemed or purchased, in whole or in part, pursuant to
such obligation;

        (9) if other than denominations of $1,000 and any integral multiple
thereof, the denominations in which any Securities of the series shall be
issuable;

        (10) if the amount of principal of or any premium or interest on any
Securities of the series may be determined with reference to an index or
pursuant to a formula, the manner in which such amounts shall be determined;

        (11) if other than the currency of the United States of America, the
currency, currencies or currency units in which the principal of or any premium
or interest on any Securities of the series shall be payable and the manner of
determining the equivalent thereof in the currency of the United States of
America for any purpose, including for purposes of the definition of
"Outstanding" in Section 101;

        (12) if the principal of or any premium or interest on any Securities of
the series is to be payable, at the election of the Company or the Holder
thereof, in one or more currencies or currency units other than that or those in
which such Securities are stated to be payable, the currency, currencies or


                                      -24-
<PAGE>   33

currency units in which the principal of or any premium or interest on such
Securities as to which such election is made shall be payable, the periods
within which and the terms and conditions upon which such election is to be made
and the amount so payable (or the manner in which such amount shall be
determined);

        (13) if other than the entire principal amount thereof, the portion of
the principal amount of any Securities of the series which shall be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502;

        (14) if the principal amount payable at the Stated Maturity of any
Securities of the series will not be determinable as of any one or more dates
prior to the Stated Maturity, the amount which shall be deemed to be the
principal amount of such Securities as of any such date for any purpose
thereunder or hereunder, including the principal amount thereof which shall be
due and payable upon any Maturity other than the Stated Maturity or which shall
be deemed to be Outstanding as of any date prior to the Stated Maturity (or, in
any such case, the manner in which such amount deemed to be the principal amount
shall be determined);

        (15) if applicable, that the Securities of the series, in whole or any
specified part, shall be defeasible pursuant to Section 1302 or Section 1303 or
both such Sections and, if other than by a Board Resolution, the manner in which
any election by the Company to defease such Securities shall be evidenced;

        (16) if applicable, the terms of any right to convert Securities of the
series into, or exchange securities for, shares of Common Stock of the Company
or other securities or property;

        (17) if applicable, that any Securities of the series shall be issuable
in whole or in part in the form of one or more Global Securities and, in such
case, the respective Depositaries for such Global Securities, the form of any
legend or legends which shall be borne by any such Global Security in addition
to or in lieu of that set forth in Section 204 and any circumstances in addition
to or in lieu of those set forth in Clause (2) of the last paragraph of Section
305 in which any such Global Security may be exchanged in whole or in part for
Securities registered, and any transfer of such Global Security in whole or in
part may be registered, in the name or names of Persons other than the
Depositary for such Global Security or a nominee thereof;

        (18) any addition to or change in the Events of Default which applies to
any Securities of the series and any change in the right of the Trustee or the
requisite Holders of such Securities to declare the principal amount thereof due
and payable pursuant to Section 502;

        (19) any addition to or change in the covenants set forth in Article Ten
which applies to Securities of the series; and

        (20) any other terms of the series (which terms shall not be
inconsistent with the provisions of this Indenture, except as permitted by
Section 901(5)).

                                      -25-
<PAGE>   34

        All Securities of any one series shall be substantially identical except
as to denomination and except as may otherwise be provided in or pursuant to the
Board Resolution referred to above and (subject to Section 303) set forth, or
determined in the manner provided, in the Officers' Certificate referred to
above or in any such indenture supplemental hereto.

        If any of the terms of the series are established by action taken
pursuant to a Board Resolution, a copy of an appropriate record of such action
shall be certified by the Secretary or an Assistant Secretary of the Company and
delivered to the Trustee at or prior to the delivery of the Officers'
Certificate setting forth the terms of the series.

        The Securities shall be subordinated in right of payment to Senior Debt
as provided in Article Fifteen.

SECTION 302.      DENOMINATIONS.

        The Securities of each series shall be issuable only in registered form
without coupons and only in such denominations as shall be specified as
contemplated by Section 301. In the absence of any such specified denomination
with respect to the Securities of any series, the Securities of such series
shall be issuable in denominations of $1,000 and any integral multiple thereof.

SECTION 303.      EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

        The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its principal financial
officer, its President or one of its Vice Presidents, attested by its Treasurer,
its Assistant Treasurer, its Secretary or one of its Assistant Secretaries. The
signature of any of these officers on the Securities may be manual or facsimile.

        Securities bearing the manual or facsimile signatures of individuals who
were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to 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 of any series executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities, and the Trustee in accordance
with the Company Order shall authenticate and deliver such Securities. If the
form or terms of the Securities of the series have been established by or
pursuant to one or more Board Resolutions as permitted by Sections 201 and 301,
in authenticating such Securities, and accepting the additional responsibilities
under this Indenture in relation to such Securities, the Trustee shall be
entitled to receive, and (subject to Section 601) shall be fully protected in
relying upon, a copy of such Board Resolution, the Officers' Certificate setting
forth the terms of the series and an Opinion of Counsel, with such Opinion of
Counsel stating,

                                      -26-
<PAGE>   35

        (1) if the form of such Securities has been established by or pursuant
to Board Resolution as permitted by Section 201, that such form has been
established in conformity with the provisions of this Indenture;

        (2) if the terms of such Securities have been established by or pursuant
to Board Resolution as permitted by Section 301, that such terms have been
established in conformity with the provisions of this Indenture; and

        (3) that such Securities, when authenticated and delivered by the
Trustee and issued by the Company in the manner and subject to any conditions
specified in such Opinion of Counsel, will constitute valid and legally binding
obligations of the Company enforceable in accordance with their terms, subject
to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles.

        If such form or terms have been so established, the Trustee shall not be
required to authenticate such Securities if the issue of such Securities
pursuant to this Indenture will affect the Trustee's own rights, duties or
immunities under the Securities and this Indenture or otherwise in a manner
which is not reasonably acceptable to the Trustee.

        Notwithstanding the provisions of Section 301 and of the preceding
paragraph, if all Securities of a series are not to be originally issued at one
time, it shall not be necessary to deliver the Officers' Certificate otherwise
required pursuant to Section 301 or the Company Order and Opinion of Counsel
otherwise required pursuant to such preceding paragraph at or prior to the
authentication of each Security of such series if such documents are delivered
at or prior to the authentication upon original issuance of the first Security
of such series to be issued.

        Each Security shall be dated the date of its authentication.

        No Security shall be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder. Notwithstanding the
foregoing, if any Security shall have been authenticated and delivered hereunder
but never issued and sold by the Company, and the Company shall deliver such
Security to the Trustee for cancellation as provided in Section 309, for all
purposes of this Indenture such Security shall be deemed never to have been
authenticated and delivered hereunder and shall never be entitled to the
benefits of this Indenture.

SECTION 304.      TEMPORARY SECURITIES.

        Pending the preparation of definitive Securities of any series, the
Company may execute, and upon Company Order the Trustee shall authenticate and
deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Securities in lieu of which they
are issued and with such


                                      -27-
<PAGE>   36

appropriate insertions, omissions, substitutions and other variations as the
officers executing such Securities may determine, as evidenced by their
execution of such Securities.

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

SECTION 305.      REGISTRATION; REGISTRATION OF TRANSFER AND EXCHANGE.

        The Company shall cause to be kept at the Corporate Trust Office of the
Trustee a register (the register maintained in such office and in any other
office or agency of the Company in a Place of Payment 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 Securities and of transfers of Securities. The Trustee is hereby
appointed "Security Registrar" for the purpose of registering Securities and
transfers of Securities as herein provided.

        Upon surrender for registration of transfer of any Security of a series
at the office or agency of the Company in a Place of Payment for that series,
the Company shall execute, and the Trustee shall authenticate and deliver, in
the name of the designated transferee or transferees, one or more new Securities
of the same series, of any authorized denominations and of like tenor and
aggregate principal amount.

        At the option of the Holder, Securities of any series may be exchanged
for other Securities of the same series, of any authorized denominations and of
like tenor and aggregate principal amount, upon surrender of the Securities to
be exchanged at such office or agency. Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

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

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

                                      -28-
<PAGE>   37

        No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906 or 1107 not involving any transfer.

        If the Securities of any series (or of any series and specified tenor)
are to be redeemed in part, the Company shall not be required (A) to issue,
register the transfer of or exchange any Securities of that series (or of that
series and specified tenor, as the case may be) during a period beginning at the
opening of business 15 days before the day of the mailing of a notice of
redemption of any such Securities selected for redemption under Section 1103 and
ending at the close of business on the day of such mailing, or (B) to register
the transfer of or exchange any Security so selected for redemption in whole or
in part, except the unredeemed portion of any Security being redeemed in part.

        The provisions of Clauses (1), (2), (3) and (4) below shall apply only
to Global Securities:

        (1) Each Global Security authenticated under this Indenture shall be
registered in the name of the Depositary designated 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.

        (2) 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 (A) such Depositary (i) has notified the Company that it is
unwilling or unable to continue as Depositary for such Global Security or (ii)
has ceased to be a clearing agency registered under the Exchange Act, (B) there
shall have occurred and be continuing an Event of Default with respect to such
Global Security or (C) there shall exist such circumstances, if any, in addition
to or in lieu of the foregoing as have been specified for this purpose as
contemplated by Section 301.

        (3) Subject to Clause (2) above, any exchange of a Global Security for
other Securities may be made in whole or in part, and all Securities issued in
exchange for a Global Security or any portion thereof shall be registered in
such names as the Depositary for such Global Security shall direct.

        (4) 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 Section, Section 304, 306, 906 or 1107 or
otherwise, shall be authenticated and delivered in the form of, and shall be, a
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.

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

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



                                      -29-
<PAGE>   38

        If there shall be delivered to the Company and the Trustee (i) evidence
to their satisfaction of the destruction, loss or theft of any Security and (ii)
such security or indemnity as may be required by them to save each of them and
any agent of either of them harmless, then, in the absence of notice to the
Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of the same series and 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 may,
instead of issuing a new Security, pay such Security.

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

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

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

SECTION 307.      PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

        Except as otherwise provided as contemplated by Section 301 with respect
to any series of Securities, 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 of any series 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 of such series (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 of such series
and the date of the proposed payment, and at the same time the Company shall
deposit with the Trustee an amount of money equal


                                      -30-
<PAGE>   39

to the aggregate amount proposed to be paid in respect of such Defaulted
Interest or shall make arrangements satisfactory to the Trustee for such deposit
prior to the date of the proposed payment, such money when deposited to be held
in trust for the benefit of the Persons entitled to such Defaulted Interest as
in this Clause provided. Thereupon the Trustee shall fix a Special Record Date
for the payment of such Defaulted Interest which shall be not more than 15 days
and not less than 10 days prior to the date of the proposed payment and not less
than 10 days after the receipt by the Trustee of the notice of the proposed
payment. The Trustee shall promptly notify the Company of such Special Record
Date and, in the name and at the expense of the Company, shall cause notice of
the proposed payment of such Defaulted Interest and the Special Record Date
therefor to be given to each Holder of Securities of such series in the manner
set forth in Section 106, not less than 10 days prior to such Special Record
Date. Notice of the proposed payment of such Defaulted Interest and the Special
Record Date therefor having been so mailed, such Defaulted Interest shall be
paid to the Persons in whose names the Securities of such series (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 on the
Securities of any series in any other lawful manner not inconsistent with the
requirements of any securities exchange on which such Securities may be listed,
and upon such notice as may be required by such exchange, if, after notice given
by the Company to the Trustee of the proposed payment pursuant to this Clause,
such manner of payment shall be deemed practicable by the Trustee.

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

        Subject to the provisions of Section 1402, in the case of any Security
(or any part thereof) which is converted after any Regular Record Date and on or
prior to the next succeeding Interest Payment Date (other than any Security the
principal of (or premium, if any, on) which shall become due and payable,
whether at Stated Maturity or by declaration of acceleration or otherwise prior
to such Interest Payment Date), interest whose Stated Maturity is on such
Interest Payment Date shall be payable on such Interest Payment Date
notwithstanding such conversion and such interest (whether or not punctually
paid or duly provided for) shall be paid to the Person in whose name that
Security (or any one or more Predecessor Securities) is registered at the close
of business on such Regular Record Date. Except as otherwise expressly provided
in the immediately preceding sentence or in Section 1402, in the case of any
Security (or any part thereof) which is converted, interest whose Stated
Maturity is after the date of conversion of such Security (or such part thereof)
shall not be payable.

SECTION 308.      PERSONS DEEMED OWNERS.

        Prior to due presentment of a Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name such Security is registered as the owner of such Security
for the purpose of receiving payment of principal of and any premium and
(subject to Section 307) any interest on such Security and for all other
purposes whatsoever, whether or


                                      -31-
<PAGE>   40

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 309.      CANCELLATION.

        All Securities surrendered for payment, redemption, registration of
transfer or exchange or for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be delivered to the Trustee
and shall be promptly canceled by it. The Company may at any time deliver to the
Trustee for cancellation any Securities previously authenticated and delivered
hereunder which the Company may have acquired in any manner whatsoever, and may
deliver to the Trustee (or to any other Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold, and all Securities so delivered shall be promptly
canceled by the Trustee. No Securities shall be authenticated in lieu of or in
exchange for any Securities canceled as provided in this Section, except as
expressly permitted by this Indenture. All canceled Securities held by the
Trustee shall be returned to the Company.

SECTION 310.      COMPUTATION OF INTEREST.

        Except as otherwise specified as contemplated by Section 301 for
Securities of any series, interest on the Securities of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

SECTION 311.      CUSIP NUMBERS.

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


                                      -32-
<PAGE>   41
                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.      SATISFACTION AND DISCHARGE OF INDENTURE.

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

        (1)    either

               (A) all 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 306 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 1003) have been delivered to the Trustee for cancellation; or

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

                        (i)   have become due and payable, or

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

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

                                      -33-
<PAGE>   42

        Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 607, the obligations of
the Company to any Authenticating Agent under Section 614 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of Clause (1) of
this Section, the obligations of the Trustee under Section 402 and the last
paragraph of Section 1003 shall survive.

SECTION 402.      APPLICATION OF TRUST MONEY.

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

                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.      EVENTS OF DEFAULT.

        "Event of Default," wherever used herein with respect to Securities of
any series, 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
Fifteen 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 any interest upon any Security of that
series when it becomes due and payable, and continuance of such default for a
period of 30 days; or

        (2) default in the payment of the principal of or any premium on any
Security of that series at its Maturity; or

        (3) default in the deposit of any sinking fund payment, when and as due
by the terms of a Security of that series; or

        (4) 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
whose performance or whose breach is elsewhere in this Section specifically
dealt with or which has expressly been included in this Indenture solely for the
benefit of series of Securities other than that series), and continuance of such
default or breach for a period of 90 days after there has been given, by
registered or certified mail, to the Company by the Trustee or to the Company
and the Trustee by the Holders of at least 25% in principal amount of the
Outstanding Securities of that series 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



                                      -34-
<PAGE>   43

        (5) failure by the Company to make any payment at maturity, including
any applicable grace period, in respect of indebtedness, which term as used
herein means obligations (other than the Securities of such series or
non-recourse obligations) of the Company for borrowed money or evidenced by
bonds, debentures, notes or other similar instruments ("Indebtedness") in an
amount in excess of $25,000,000 or the equivalent thereof in any other currency
or composite currency and such failure shall have continued for thirty (30) days
after written notice thereof shall have been given to the Company by the Trustee
or to the Company and the Trustee by the Holders of at least 25% in principal
amount of the Outstanding Securities of that series a written notice specifying
such default or breach and requiring it to be remedied and stating that such
notice is a "Notice of Default" hereunder; or

        (6) 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 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; or

        (7) any other Event of Default provided with respect to Securities of
that series.

SECTION 502.      ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

        If an Event of Default (other than an Event of Default specified in
Section 501(5) or 501(6)) with respect to Securities of any series at the time
Outstanding 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
of that series may declare the principal amount of all the Securities of that
series (or, if any Securities of that series are Original Issue Discount
Securities, such portion of the principal amount of such Securities as may be
specified by the terms thereof) to be due and payable immediately, by a notice
in writing to the Company (and to the Trustee if given by Holders), and upon any
such declaration such principal amount (or specified amount) shall become
immediately due and payable. If an Event of Default specified in Section 501(5)
or 501(6) with respect to Securities of any series at the time Outstanding
occurs, the principal amount of all the Securities of that series (or, if any
Securities of that series are Original Issue Discount Securities, such portion
of the principal amount of such Securities as may be specified by the terms
thereof) shall automatically, and without any declaration or other action on the
part of the Trustee or any Holder, become immediately due and payable. Any
payments by the Company on the Securities following any such acceleration will
be subject to the subordination provisions of Article Fifteen to the extent
provided therein.



                                      -35-
<PAGE>   44

        At any time after such a declaration of acceleration with respect to
Securities of any series 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 provided, the Holders of a majority in principal amount of the
Outstanding Securities of that series, 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 of that series,

               (B) the principal of (and premium, if any, on) any Securities of
        that series which have become due otherwise than by such declaration of
        acceleration and any interest thereon at the rate or rates prescribed
        therefor in such Securities,

               (C) to the extent that payment of such interest is lawful,
        interest upon overdue interest at the rate or rates prescribed therefor
        in such Securities, and

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

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

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

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

        The Company covenants that if

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

        (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, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and any premium and interest and, to the extent that
payment of such interest shall be legally enforceable, interest on any overdue
principal and premium and on any overdue interest, at the rate or rates
prescribed therefor in such Securities, and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

                                      -36-
<PAGE>   45

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

SECTION 504.      TRUSTEE MAY FILE PROOFS OF CLAIM.

        In case of any judicial proceeding relative to the Company (or any other
obligor upon the Securities), its property or its creditors, the Trustee shall
be entitled and empowered, by intervention in such proceeding or otherwise, to
take any and all actions authorized under the Trust Indenture Act in order to
have claims of the Holders and the Trustee allowed in any such proceeding. In
particular, the Trustee shall be authorized to collect and receive any moneys or
other property payable or deliverable on any such claims and to distribute the
same; and any custodian, receiver, assignee, trustee, liquidator, sequestrator
or other similar official in any such judicial proceeding is hereby authorized
by each Holder to make such payments to the Trustee and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amount due it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 607.

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

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

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

SECTION 506.      APPLICATION OF MONEY COLLECTED.

        Any money collected by the Trustee pursuant to this Article shall be
applied in the following order, at the date or dates fixed by the Trustee and,
in case of the distribution of such money on account of principal or any premium
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:

                                      -37-
<PAGE>   46

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

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

SECTION 507.      LIMITATION ON SUITS.

        No Holder of any Security of any series 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 with respect to the Securities of that series;

        (2) the Holders of not less than 25% in principal amount of the
Outstanding Securities of that series 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 of that series; 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 to 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 of such
Holders.

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

        Notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and any premium and (subject to Section 307)
interest on such Security on the respective Stated Maturities expressed in such
Security (or, in the case of redemption, on the Redemption Date), to convert
such Securities in


                                      -38-
<PAGE>   47

accordance with Article Fourteen and to institute suit for the enforcement of
any such payment, and such rights shall not be impaired without the consent of
such Holder.

SECTION 509.      RESTORATION OF RIGHTS AND REMEDIES.

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

SECTION 510.      RIGHTS AND REMEDIES CUMULATIVE.

        Except as otherwise provided with respect to the replacement or payment
of mutilated, destroyed, lost or stolen Securities in the last paragraph of
Section 306, no right or remedy herein conferred upon or reserved to the Trustee
or to the Holders is intended to be exclusive of any other right or remedy, and
every right and remedy shall, to the extent permitted by law, be cumulative and
in addition to every other right and remedy given hereunder or now or hereafter
existing at law or in equity or otherwise. The assertion or employment of any
right or remedy hereunder, or otherwise, shall not prevent the concurrent
assertion or employment of any other appropriate right or remedy.

SECTION 511.      DELAY OR OMISSION NOT WAIVER.

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

SECTION 512.      CONTROL BY HOLDERS.

        The Holders of a majority in principal amount of the Outstanding
Securities of any series 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, with respect to the
Securities of such series, provided that

        (1) such direction shall not be in conflict with any rule of law or with
this Indenture and the Trustee shall not have determined that the action so
directed would be unjustly prejudicial to Holders of Securities of that series,
or any other series, not taking part in such direction; and

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

                                      -39-
<PAGE>   48

SECTION 513.      WAIVER OF PAST DEFAULTS.

        The Holders of not less than a majority in principal amount of the
Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past default hereunder with respect to such
series and its consequences, except a default

        (1) in the payment of the principal of or any premium or interest on any
Security of such series, or

        (2) in respect of a covenant or provision hereof which under Article
Nine cannot be modified or amended without the consent of the Holder of each
Outstanding Security of such series 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 514.      UNDERTAKING FOR COSTS.

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

SECTION 515.      WAIVER OF USURY, STAY OR EXTENSION LAWS.

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

                                      -40-
<PAGE>   49

                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601.      CERTAIN DUTIES AND RESPONSIBILITIES.

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

SECTION 602.      NOTICE OF DEFAULTS.

        If a default occurs hereunder with respect to Securities of any series,
the Trustee shall give the Holders of Securities of such series notice of such
default known to it as and to the extent provided by the Trust Indenture Act;
provided, however, that in the case of any default of the character specified in
Section 501(4) with respect to Securities of such series, no such notice to
Holders 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 with
respect to Securities of such series.

SECTION 603.      CERTAIN RIGHTS OF TRUSTEE.

        Subject to the provisions of Section 601:

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

        (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;

                                      -41-
<PAGE>   50

        (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 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, other evidence of indebtedness or other paper or document, but the
Trustee, in its discretion, may make such further inquiry or investigation into
such facts or matters as it may see fit, and, if the Trustee shall determine to
make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Company, personally or by agent or attorney;

        (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 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
this Indenture; and

        (9) the Trustee shall not be deemed to have notice of any default or
Event of Default unless a responsible officer of the Trustee has actual
knowledge thereof or unless written notice of any event which is in fact such a
default is received by the Trustee at the Corporate Trust Office of the Trustee,
and such notice references the Securities and this Indenture.

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

        The recitals contained herein and in the Securities, except the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and neither the Trustee nor any Authenticating Agent assumes any
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities. Neither the
Trustee nor any Authenticating Agent shall be accountable for the use or
application by the Company of Securities or the proceeds thereof.



                                      -42-
<PAGE>   51

SECTION 605.      MAY HOLD SECURITIES AND ACT AS TRUSTEE UNDER OTHER INDENTURES.

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

        Subject to the limitations imposed by the Trust Indenture Act, nothing
in this Indenture shall prohibit the Trustee from becoming and acting as trustee
under other indentures under which other securities, or certificates of interest
of participation in other securities, of the Company are outstanding in the same
manner as if it were not Trustee hereunder.

SECTION 606.      MONEY HELD IN TRUST.

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

SECTION 607.      COMPENSATION AND REIMBURSEMENT.

        The Company agrees

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

        (2) except as otherwise expressly provided herein, to reimburse the
Trustee upon its request for all 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

        (3) to indemnify the Trustee 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 the
trust or trusts hereunder, including the costs and expenses 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 501(5) or Section 501(6), the expenses
(including the reasonable charges and expenses of its counsel) and the
compensation for the services are intended to constitute expenses of
administration under any applicable Federal or State Bankruptcy, insolvency or
other similar law.

                                      -43-
<PAGE>   52

SECTION 608.      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. To the extent
permitted by such Act, the Trustee shall not be deemed to have a conflicting
interest by virtue of being a trustee under this Indenture with respect to
Securities of more than one series.

SECTION 609.      CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

        There shall at all times be one (and only one) Trustee hereunder with
respect to the Securities of each series, which may be Trustee hereunder for
Securities of one or more other series. Each Trustee shall be a Person that is
eligible pursuant to the Trust Indenture Act to act as such and has (or if the
Trustee is a member of a bank holding company system, its bank holding company
has) a combined capital and surplus of at least $50,000,000. If any such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of its supervising or examining authority, then for the purposes of
this Section and to the extent permitted by the Trust Indenture Act, the
combined capital and surplus of such Person shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time the Trustee with respect to the Securities of any
series shall cease to be eligible in accordance with the provisions of this
Section, it shall resign immediately in the manner and with the effect
hereinafter specified in this Article.

SECTION 610.      RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

        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 611.

        The Trustee may resign at any time with respect to the Securities of one
or more series by giving written notice thereof to the Company. If the
instrument of acceptance by a successor Trustee required by Section 611 shall
not have been delivered to the Trustee within 30 days after the giving of such
notice of resignation, the resigning Trustee may petition, at the expense of the
Company, any court of competent jurisdiction for the appointment of a successor
Trustee with respect to the Securities of such series.

        The Trustee may be removed at any time with respect to the Securities of
any series by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series, delivered to the Trustee and to the
Company. If the instrument of acceptance by a successor Trustee required by
Section 611 shall not have been delivered to the Trustee within 30 days after
the giving of such notice of resignation, the resigning Trustee may petition, at
the expense of the Company, any court of competent jurisdiction for the
appointment of a successor Trustee with respect to the Securities of such
series.

                                      -44-
<PAGE>   53

        If at any time:

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

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

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

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

        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, with respect
to the Securities of one or more series, the Company, by a Board Resolution,
shall promptly appoint a successor Trustee or Trustees with respect to the
Securities of that or those series (it being understood that any such successor
Trustee may be appointed with respect to the Securities of one or more or all of
such series and that at any time there shall be only one Trustee with respect to
the Securities of any particular series) and shall comply with the applicable
requirements of Section 611. If, within one year after such resignation, removal
or incapability, or the occurrence of such vacancy, a successor Trustee with
respect to the Securities of any series shall be appointed by Act of the Holders
of a majority in principal amount of the Outstanding Securities of such series
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 611, become the successor Trustee
with respect to the Securities of such series and to that extent supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series shall have been so appointed by the Company or
the Holders and accepted appointment in the manner required by Section 611, the
retiring Trustee may petition, any Holder who has been a bona fide Holder of a
Security of such series 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 with respect to the Securities of such
series.

        The Company shall give notice of each resignation and each removal of
the Trustee with respect to the Securities of any series and each appointment of
a successor Trustee with respect to the Securities of any series to all Holders
of Securities of such series in the manner provided in Section 106. Each notice
shall include the name of the successor Trustee with respect to the Securities
of such series and the address of its Corporate Trust Office.

                                      -45-
<PAGE>   54

SECTION 611.      ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

        In case of the appointment hereunder of a successor Trustee with respect
to all Securities, every such successor Trustee so appointed 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.

        In case of the appointment hereunder of a successor Trustee with respect
to the Securities of one or more (but not all) series, the Company, the retiring
Trustee and each successor Trustee with respect to the Securities of one or more
series shall execute and deliver an indenture supplemental hereto wherein each
successor Trustee shall accept such appointment and which (1) shall contain such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each successor Trustee all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor Trustee relates, (2) if the retiring Trustee
is not retiring with respect to all Securities, shall contain such provisions as
shall be deemed necessary or desirable to confirm that all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring Trustee is not retiring shall continue
to be vested in the retiring Trustee, and (3) shall add to or change any of the
provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co-trustees of the same trust and that each such
Trustee shall be trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder administered by any other such Trustee; and upon
the execution and delivery of such supplemental indenture the resignation or
removal of the retiring Trustee shall become effective to the extent provided
therein and each 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 with respect to the Securities of that or those series
to which the appointment of such successor Trustee relates; but, on request of
the Company or any successor Trustee, such retiring Trustee shall, upon payment
of all of its charges, duly assign, transfer and deliver to such successor
Trustee all property and money held by such retiring Trustee hereunder with
respect to the Securities of that or those series to which the appointment of
such successor Trustee relates.

        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 referred to in the
first or second preceding paragraph, as the case may be.

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

                                      -46-
<PAGE>   55

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

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

SECTION 613.      PREFERENTIAL COLLECTION OF CLAIMS AGAINST 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).

SECTION 614.      APPOINTMENT OF AUTHENTICATING AGENT.

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

        Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to all or substantially



                                      -47-
<PAGE>   56

all the corporate agency or corporate trust business of an Authenticating Agent,
shall continue to be an Authenticating Agent, provided such corporation shall be
otherwise eligible under this Section, without the execution or filing of any
paper or any further act on the part of the Trustee or the Authenticating Agent.

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

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

        If an appointment with respect to one or more series is made pursuant to
this Section 612, the Securities of such series may have endorsed thereon, in
addition to the Trustee's certificate of authentication, an alternative
certificate of authentication in the following form:

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


                              THE BANK OF NEW YORK,
                              As Trustee

                              By:
                                  --------------------------------------- ,
                                    As Authenticating Agent

                              By :
                                  ----------------------------------------
                                    Authorized Signatory

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

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

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

                                      -48-
<PAGE>   57

        (1) semi-annually, not later 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 of each series as of such Regular Record
Date, as the case may be, and

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

provided that no such list need be furnished by the Company to the Trustee so
long as the Trustee is acting as Security Registrar.

SECTION 702.      PRESERVATION OF INFORMATION; COMMUNICATIONS TO HOLDERS.

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

        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 privileges of the Trustee, shall be as provided by the Trust
Indenture Act.

        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 703.      REPORTS BY TRUSTEE.

        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.

        If required by Section 313(a) of the Trust Indenture Act, the Trustee
shall, within sixty days after each July 15 following the date of this Indenture
deliver to Holders a brief report, dated as of such July 15, which complies with
the provisions of such Section 313(a).

        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 any
Securities are listed, with the Commission and with the Company. The Company
will promptly notify the Trustee when any Securities are listed on any stock
exchange or of any delisting thereof.

                                      -49-
<PAGE>   58

SECTION 704.      REPORTS BY COMPANY.

        The Company shall file with the Trustee and the Commission, and transmit
to Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to the Trust Indenture 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 Exchange Act shall be filed with the
Trustee within 15 days after the same is so required to be filed with the
Commission.

        Delivery of such reports, information and documents to the Trustee is
for informational purposes only and the Trustee's receipt of such shall not
constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Company's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).

                                  ARTICLE EIGHT

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.      COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS.

        The Company shall not consolidate with or merge into any other Person
(in a transaction in which the Company is not the surviving corporation) or
convey, transfer or lease its properties and assets substantially as an entirety
to any Person, unless:

        (1) in case the Company shall consolidate with or merge into another
Person (in a transaction in which the Company is not the surviving corporation)
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, trust
or other business entity, 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 and any premium and interest on all the
Securities and the performance or observance of every covenant of this Indenture
on the part of the Company to be performed or observed and the conversion rights
shall be provided for in accordance with Article Fourteen, if applicable, or as
otherwise specified pursuant to Section 301, by supplemental indenture
satisfactory in form to the Trustee, executed and delivered to the Trustee, by
the Person (if other than the Company) formed by such consolidation or into
which the Company shall have been merged or by the Person which shall have
acquired the Company's assets;

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

                                      -50-
<PAGE>   59

        (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.

SECTION 802.      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 the properties
and assets of the Company substantially as an entirety in accordance with
Section 801, the successor Person formed by such consolidation or into which the
Company is merged or to which such conveyance, transfer or lease is made shall
succeed to, and be substituted for, and may exercise every right and power of,
the Company under this Indenture with the same effect as if such successor
Person had been named as the Company herein, and thereafter, except in the case
of a lease, the predecessor Person shall be relieved of all obligations and
covenants under this Indenture and the Securities.

                                  ARTICLE NINE

                            SUPPLEMENTAL INDENTURES

SECTION 901.      SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

        Without the consent of any Holders, 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, in form satisfactory to the
Trustee, for any of the following purposes:

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

        (2) to add to the covenants of the Company for the benefit of the
Holders of all or any series of Securities (and if such covenants are to be for
the benefit of less than all series of Securities, stating that such covenants
are expressly being included solely for the benefit of such series) or to
surrender any right or power herein conferred upon the Company; or

        (3) to add any additional Events of Default for the benefit of the
Holders of all or any series of Securities (and if such additional Events of
Default are to be for the benefit of less than all series of Securities, stating
that such additional Events of Default are expressly being included solely for
the benefit of such series); or

        (4) to add to or change any of the provisions of this Indenture to such
extent as shall be necessary to permit or facilitate the issuance of Securities
in bearer form, registrable or not registrable



                                      -51-
<PAGE>   60

as to principal, and with or without interest coupons, or to permit or
facilitate the issuance of Securities in uncertificated form; or

        (5) to add to, change or eliminate any of the provisions of this
Indenture in respect of one or more series of Securities, provided that any such
addition, change or elimination (A) shall neither (i) apply to any Security of
any series created prior to the execution of such supplemental indenture and
entitled to the benefit of such provision nor (ii) modify the rights of the
Holder of any such Security with respect to such provision or (B) shall become
effective only when there is no such Security Outstanding; or

        (6) to secure the Securities; or

        (7) to establish the form or terms of Securities of any series as
permitted by Sections 201 and 301; or

        (8) to evidence and provide for the acceptance of appointment hereunder
by a successor Trustee with respect to the Securities of one or more series and
to add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee, pursuant to the requirements of Section 611;
or

        (9) to make provision with respect to the conversion rights of Holders
pursuant to the requirements of Article Fourteen, including providing for the
conversion of the securities into any security (other than the Common Stock of
the Company) or property of the Company; or

        (10) to cure any ambiguity, to correct or supplement any provision
herein which may be defective or inconsistent with any other provision herein,
or to make any other provisions with respect to matters or questions arising
under this Indenture, provided that such action pursuant to this Clause (10)
shall not adversely affect the interests of the Holders of Securities of any
series in any material respect; or

        (11) to supplement any of the provisions of the Indenture to such extent
as shall be necessary to permit or facilitate the defeasance and discharge of
any series of Securities pursuant to Articles Four and Thirteen, provided that
any such action shall not adversely affect the interests of the Holders of
Securities of such series or any other series of Securities in any material
respect.

SECTION 902.      SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

        With the consent of the Holders of a majority in principal amount of the
Outstanding Securities of each series affected by such supplemental indenture,
by Act of said Holders delivered to the Company and the Trustee, 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 of such series under this Indenture; provided, however, that no such
supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby,

                                      -52-
<PAGE>   61

        (1) change the Stated Maturity of the principal of, or any installment
of principal of or interest on, any Security, or reduce the principal amount
thereof or the rate of interest thereon or any premium payable upon the
redemption thereof, or reduce the amount of the principal of an Original Issue
Discount Security or any other Security which would be due and payable upon a
declaration of acceleration of the Maturity thereof pursuant to Section 502, or
change any Place of Payment where, or the coin or currency in which, any
Security or any premium or interest thereon is payable, or impair the right to
institute suit for the enforcement of any such payment on or after the Stated
Maturity thereof (or, in the case of redemption, on or after the Redemption
Date), or modify the provisions of this Indenture with respect to the
subordination of such series of Securities in a manner adverse to the Holders of
Securities of such series, or

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

        (3) modify any of the provisions of this Section, Section 513 or Section
1008, except to increase any such percentage or to provide that certain other
provisions of this Indenture cannot be modified or waived without the consent of
the Holder of each Outstanding Security affected thereby; provided, however,
that this clause shall not be deemed to require the consent of any Holder with
respect to changes in the references to "the Trustee" and concomitant changes in
this Section and Section 1008, or the deletion of this proviso, in accordance
with the requirements of Sections 611 and 901(8), or

        (4) if applicable, make any change that adversely affects the right to
convert any security as provided in Article Fourteen or pursuant to Section 301
(except as permitted by Section 901(9)) or decrease the conversion rate or
increase the conversion price of any such security.

        A supplemental indenture which changes or eliminates any covenant or
other provision of this Indenture which has expressly been included solely for
the benefit of one or more particular series of Securities, or which modifies
the rights of the Holders of Securities of such series with respect to such
covenant or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.

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

SECTION 903.      EXECUTION OF SUPPLEMENTAL INDENTURES.

        In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Sections 601 and 603) shall be fully protected in relying upon,
an Opinion of Counsel stating that the execution of such supplemental indenture
is authorized or permitted


                                      -53-
<PAGE>   62

by this Indenture. The Trustee may, but shall not be obligated to, enter into
any such supplemental indenture which affects the Trustee's own rights, duties
or immunities under this Indenture or otherwise.

SECTION 904.      EFFECT OF SUPPLEMENTAL INDENTURES.

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

SECTION 905.      CONFORMITY WITH TRUST INDENTURE ACT.

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

SECTION 906.      REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

        Securities of any series 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 of any series so modified as to conform, in the
opinion of the Trustee and the Company, to any such supplemental indenture may
be prepared and executed by the Company and authenticated and delivered by the
Trustee in exchange for Outstanding Securities of such series.

SECTION 907.      SUBORDINATION UNIMPAIRED.

        No provision in any supplemental indenture which affects the superior
position of the holders of Senior Debt shall be effective against holders of
Senior Debt.

                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001.          PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

        The Company covenants and agrees for the benefit of each series of
Securities that it will duly and punctually pay the principal of and any premium
and interest on the Securities of that series in accordance with the terms of
the Securities and this Indenture.

SECTION 1002.          MAINTENANCE OF OFFICE OR AGENCY.

        The Company will maintain in each Place of Payment for any series of
Securities an office or agency where Securities of that series may be presented
or surrendered for payment, where Securities of that series may be surrendered
for registration of transfer or exchange, where Securities of that series


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<PAGE>   63

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

        The Company may also from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all such purposes and may from time to time rescind
such designations; provided, however, that no such designation or rescission
shall in any manner relieve the Company of its obligation to maintain an office
or agency in each Place of Payment for Securities of any series for such
purposes. The Company will give prompt written notice to the Trustee of any such
designation or rescission and of any change in the location of any such other
office or agency.

SECTION 1003.          MONEY FOR SECURITIES PAYMENTS TO BE HELD IN TRUST.

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

        Whenever the Company shall have one or more Paying Agents for any series
of Securities, it will, on or prior to each due date of the principal of or any
premium or interest on any Securities of that series, deposit with a Paying
Agent a sum sufficient to pay such amount, such sum to be held as provided by
the Trust Indenture Act, and (unless such Paying Agent is the Trustee) the
Company will promptly notify the Trustee of its action or failure so to act.

        The Company will cause each Paying Agent for any series of Securities
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) comply with the provisions of
the Trust Indenture Act applicable to it as a Paying Agent and (2) during the
continuance of any default by the Company (or any other obligor upon the
Securities of that series) in the making of any payment in respect of the
Securities of that series, upon the written request of the Trustee, forthwith
pay to the Trustee all sums held in trust by such Paying Agent for payment in
respect of the Securities of that series.

        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;


                                      -55-
<PAGE>   64

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 or any premium or
interest on any Security of any series and remaining unclaimed for a period
ending on the earlier of the date that is ten Business Days prior to the date
such money would escheat to the State or two years after such principal, premium
or interest has become due and payable shall be paid to the Company on Company
Request, or (if then held by the Company) shall be discharged from such trust;
and the Holder of such Security shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease.

SECTION 1004.          STATEMENT BY OFFICERS AS TO DEFAULT.

        The Company will 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 fiscal year of the Company ends on June 30;
and the Company will give the Trustee prompt written notice of any change of its
fiscal year.

SECTION 1005.          EXISTENCE.

        Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence.

SECTION 1006.          MAINTENANCE OF PROPERTIES.

        The Company will cause all properties used or useful in the conduct of
its business 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, and to the extent, 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 and not disadvantageous
in any material respect to the Holders.



                                      -56-
<PAGE>   65

SECTION 1007.          PAYMENT OF TAXES AND OTHER CLAIMS.

        The Company will pay or discharge or cause to be paid or discharged,
before the same shall become delinquent, (1) all taxes, assessments and
governmental charges levied or imposed upon the Company or upon the income,
profits or property of the Company, and (2) all lawful claims for labor,
materials and supplies which, if unpaid, might by law become a lien upon the
property of the Company; provided, however, that the Company shall not be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge or claim (i) whose amount, applicability or validity is being
contested in good faith by appropriate proceedings or (ii) if the failure to pay
or discharge would not have a material adverse effect on the assets, business,
operations, properties or condition (financial or otherwise) of the Company and
its subsidiaries, taken as a whole.

SECTION 1008.          WAIVER OF CERTAIN COVENANTS.

        Except as otherwise specified as contemplated by Section 301 for
Securities of such series or in a supplemental indenture, the Company may, with
respect to the Securities of any series, omit in any particular instance to
comply with any term, provision or condition set forth in any covenant provided
pursuant to Section 301(19), 901(2), 901(7), 1006 or 1007 for the benefit of the
Holders of such series if before the time for such compliance the Holders of at
least a majority in principal amount of the Outstanding Securities of such
series shall, by Act of such Holders, either waive such compliance in such
instance or generally waive compliance with such term, provision or condition,
but no such waiver shall extend to or affect such term, provision or condition
except to the extent so expressly waived, and, until such waiver shall become
effective, the obligations of the Company and the duties of the Trustee in
respect of any such term, provision or condition shall remain in full force and
effect.

SECTION 1009.          CALCULATION OF ORIGINAL ISSUE DISCOUNT.

        The Company shall file with the Trustee promptly at the end of each
calendar year (i) a written notice specifying the amount of original issue
discount (including daily rates and accrual periods) accrued on Outstanding
Securities as of the end of such year and (ii) such other specific information
relating to such original issue discount as may then be relevant under the
Internal Revenue Code of 1986, as amended from time to time.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.          APPLICABILITY OF ARTICLE.

        Securities of any series which are redeemable before their Stated
Maturity shall be redeemable in accordance with their terms and (except as
otherwise specified as contemplated by Section 301 for such Securities) in
accordance with this Article.

                                      -57-
<PAGE>   66

SECTION 1102.          ELECTION TO REDEEM; NOTICE TO TRUSTEE.

        The election of the Company to redeem any Securities shall be evidenced
by a Board Resolution or in another manner specified as contemplated by Section
301 for such Securities. In case of any redemption at the election of the
Company of less than all the Securities of any series (including any such
redemption affecting only a single Security), the Company shall, at least 45
days prior to the Redemption Date fixed by the Company (unless a shorter notice
shall be satisfactory to the Trustee), notify the Trustee of such Redemption
Date, of the principal amount of Securities of such series to be redeemed and,
if applicable, of the tenor of the Securities to be redeemed. In the case of any
redemption of Securities prior to the expiration of any restriction on such
redemption provided in the terms of such Securities or elsewhere in this
Indenture, the Company shall furnish the Trustee with an Officers' Certificate
evidencing compliance with such restriction.

SECTION 1103.          SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.

        If less than all the Securities of any series are to be redeemed (unless
all the Securities of such series and of a specified tenor are to be redeemed or
unless such redemption affects only a single Security), the particular
Securities to be redeemed shall be selected not more than 45 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities of such series
not previously called for redemption, by lot, or in the Trustee's discretion, on
a pro-rata basis, provided that the unredeemed portion of the principal amount
of any Security shall be in an authorized denomination (which shall not be less
than the minimum authorized denomination) for such Security. If less than all
the Securities of such series and of a specified tenor are to be redeemed
(unless such redemption affects only a single Security), the particular
Securities to be redeemed shall be selected not more than 45 days prior to the
Redemption Date by the Trustee, from the Outstanding Securities of such series
and specified tenor not previously called for redemption in accordance with the
preceding sentence.

        If any 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 shall be treated
by the Trustee as Outstanding for the purpose of such selection.

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

        The provisions of the two preceding paragraphs shall not apply with
respect to any redemption affecting only a single Security, whether such
Security is to be redeemed in whole or in part. In the case of any such
redemption in part, the unredeemed portion of the principal amount of the
Security shall be in an authorized denomination (which shall not be less than
the minimum authorized denomination) for such Security.

                                      -58-
<PAGE>   67

        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 1104.          NOTICE OF REDEMPTION.

        Notice of redemption shall be given by first-class mail, postage
prepaid, mailed not less than 30 nor more than 60 days prior to the Redemption
Date, unless a shorter period is specified in the Securities to be redeemed, to
each Holder of Securities to be redeemed, at its address appearing in the
Security Register.

        All notices of redemption shall identify the Securities to be redeemed
(including CUSIP number(s)) and shall state:

        (1) the Redemption Date,

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

        (3) if less than all the Outstanding Securities of any series consisting
of more than a single Security are to be redeemed, the identification (and, in
the case of partial redemption of any such Securities, the principal amounts) of
the particular Securities to be redeemed and, if less than all the Outstanding
Securities of any series consisting of a single Security are to be redeemed, the
principal amount of the particular Security to be redeemed,

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

        (5) the place or places where each such Security is to be surrendered
for payment of the Redemption Price,

        (6) if applicable, the conversion price, that the date on which the
right to convert the principal of the Securities or the portions thereof to be
redeemed will terminate will be the Business Day prior to the Redemption Date
and the place or places where such Securities may be surrendered for conversion,
and

        (7) that the redemption is for a sinking fund, if such is the case.

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

                                      -59-
<PAGE>   68

SECTION 1105.          DEPOSIT OF REDEMPTION PRICE.

        On or prior to 10:00 a.m., New York time, on any Redemption Date, the
Company shall deposit with the Trustee or with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust as
provided in Section 1003) an amount of money sufficient to pay the Redemption
Price of, and (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.

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

SECTION 1106.          SECURITIES PAYABLE ON REDEMPTION DATE.

        Notice of redemption having been given as aforesaid, the Securities so
to be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest) such Securities shall cease to bear interest. Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption Price, together with accrued interest
to the Redemption Date; provided, however, that, unless otherwise specified as
contemplated by Section 301, installments of interest whose Stated Maturity is
on or prior to the Redemption Date will be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such at the
close of business on the relevant Record Dates according to their terms and the
provisions of Section 307.

        If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal and any premium shall, until
paid, bear interest from the Redemption Date at the rate prescribed therefor in
the Security.

SECTION 1107.          SECURITIES REDEEMED IN PART.

        Any Security which is to be redeemed only in part shall be surrendered
at a Place of Payment therefor (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 its attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and deliver to the Holder of such Security without service
charge, a new Security or Securities of the same series and of like tenor, of
any authorized denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered.


                                      -60-
<PAGE>   69

                                 ARTICLE TWELVE

                                  SINKING FUNDS

SECTION 1201.          APPLICABILITY OF ARTICLE.

        The provisions of this Article shall be applicable to any sinking fund
for the retirement of Securities of any series except as otherwise specified as
contemplated by Section 301 for such Securities.

        The minimum amount of any sinking fund payment provided for by the terms
of any Securities is herein referred to as a "mandatory sinking fund payment,"
and any payment in excess of such minimum amount provided for by the terms of
such Securities is herein referred to as an "optional sinking fund payment." If
provided for by the terms of any Securities, the cash amount of any sinking fund
payment may be subject to reduction as provided in Section 1202. Each sinking
fund payment shall be applied to the redemption of Securities as provided for by
the terms of such Securities.

SECTION 1202.          SATISFACTION OF SINKING FUND PAYMENTS WITH SECURITIES.

        The Company (1) may deliver Outstanding Securities of a series (other
than any previously called for redemption) and (2) may apply as a credit
Securities of a series which have been redeemed either at the election of the
Company pursuant to the terms of such Securities or through the application of
permitted optional sinking fund payments pursuant to the terms of such
Securities, in each case in satisfaction of all or any part of any sinking fund
payment with respect to any Securities of such series required to be made
pursuant to the terms of such Securities as and to the extent provided for by
the terms of such Securities; provided that the Securities to be so credited
have not been previously so credited. The Securities to be so credited shall be
received and credited for such purpose by the Trustee at the Redemption Price,
as specified in the Securities so to be redeemed, for redemption through
operation of the sinking fund and the amount of such sinking fund payment shall
be reduced accordingly.

SECTION 1203.          REDEMPTION OF SECURITIES FOR SINKING FUND.

        Not less than 60 days prior to each sinking fund payment date for any
Securities, the Company will deliver to the Trustee an Officers' Certificate
specifying the amount of the next ensuing sinking fund payment for such
Securities pursuant to the terms of such Securities, the portion thereof, if
any, which is to be satisfied by payment of cash and the portion thereof, if
any, which is to be satisfied by delivering and crediting Securities pursuant to
Section 1202 and will also deliver to the Trustee any Securities to be so
delivered. Not less than 30 days prior to each such sinking fund payment date,
the Trustee shall select the Securities to be redeemed upon such sinking fund
payment date in the manner specified in Section 1103 and cause notice of the
redemption thereof to be given in the name of and at the expense of the Company
in the manner provided in Section 1104. Such notice having been duly given, the
redemption of such Securities shall be made upon the terms and in the manner
stated in Sections 1106 and 1107.


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                                ARTICLE THIRTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1301.      COMPANY'S OPTION TO EFFECT DEFEASANCE OR COVENANT DEFEASANCE.

        The Company may elect, at its option at any time, to have Section 1302
or Section 1303 applied to any Securities or any series of Securities, as the
case may be, designated pursuant to Section 301 as being defeasible pursuant to
such Section 1302 or 1303, in accordance with any applicable requirements
provided pursuant to Section 301 and upon compliance with the conditions set
forth below in this Article. Any such election shall be evidenced by a Board
Resolution or in another manner specified as contemplated by Section 301 for
such Securities.

SECTION 1302.      DEFEASANCE AND DISCHARGE.

        Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of Securities, as the case may be, the
Company shall be deemed to have been discharged from its obligations, and the
provisions of Article Fifteen shall cease to be effective, with respect to such
Securities as provided in this Section on and after the date the conditions set
forth in Section 1304 are satisfied (hereinafter called "Defeasance"). For this
purpose, such Defeasance means that the Company shall be deemed to have paid and
discharged the entire indebtedness represented by such Securities and to have
satisfied all its other obligations under such Securities and this Indenture
insofar as such Securities are concerned (and the Trustee, at the expense of the
Company, shall execute proper instruments acknowledging the same), subject to
the following which shall survive until otherwise terminated or discharged
hereunder: (1) the rights of Holders of such Securities to receive, solely from
the trust fund described in Section 1304 and as more fully set forth in such
Section, payments in respect of the principal of and any premium and interest on
such Securities when payments are due, (2) the Company's obligations with
respect to such Securities under Sections 304, 305, 306, 1002 and 1003, and, if
applicable, Article Fourteen, (3) the rights, powers, trusts, duties and
immunities of the Trustee hereunder and (4) this Article. Subject to compliance
with this Article, the Company may exercise its option (if any) to have this
Section applied to any Securities notwithstanding the prior exercise of its
option (if any) to have Section 1303 applied to such Securities.

SECTION 1303.      COVENANT DEFEASANCE.

        Upon the Company's exercise of its option (if any) to have this Section
applied to any Securities or any series of Securities, as the case may be, (1)
the Company shall be released from its obligations under Sections 1006 through
1007, inclusive, and any covenants provided pursuant to Section 301(19), 901(2)
or 901(7) for the benefit of the Holders of such Securities and (2) the
occurrence of any event specified in Sections 501(4) (with respect to any of
Sections 1006 through 1007, inclusive, and any such covenants provided pursuant
to Section 301(19), 901(2) or 901(7)), shall be deemed not to be or result in an
Event of Default, and (3) the provisions of Article Fifteen shall cease to be
effective, in each case with respect to such Securities as provided in this
Section on and after the date the conditions set forth in Section 1304 are
satisfied (hereinafter called "Covenant Defeasance"). For this purpose, such


                                      -62-
<PAGE>   71

Covenant Defeasance means that, with respect to such Securities, the Company may
omit to comply with and shall have no liability in respect of any term,
condition or limitation set forth in any such specified Section (to the extent
so specified in the case of Section 501(4)) or Article Fifteen, whether directly
or indirectly by reason of any reference elsewhere herein to any such Section or
Article or by reason of any reference in any such Section or Article to any
other provision herein or in any other document, but the remainder of this
Indenture and such Securities shall be unaffected thereby.

SECTION 1304.          CONDITIONS TO DEFEASANCE OR COVENANT DEFEASANCE.

        The following shall be the conditions to the application of Section 1302
or Section 1303 to any Securities or any series of Securities, as the case may
be:

        (1) The Company shall irrevocably have deposited or caused to be
deposited with the Trustee (or another trustee which satisfies the requirements
contemplated by Section 609 and agrees to comply with the provisions of this
Article applicable to it) as trust funds in trust for the purpose of making the
following payments, specifically pledged as security for, and dedicated solely
to, the benefits of the Holders of such Securities, (A) money in an amount, or
(B) U.S. Government Obligations which through the scheduled payment of principal
and interest in respect thereof in accordance with their terms will provide, not
later than one day before the due date of any payment, money in an amount, or
(C) a combination thereof, in each case sufficient, in the opinion of a
nationally recognized firm of independent public accountants expressed in a
written certification thereof delivered to the Trustee, to pay and discharge,
and which shall be applied by the Trustee (or any such other qualifying trustee)
to pay and discharge, the principal of and any premium and interest on such
Securities on the respective Stated Maturities, in accordance with the terms of
this Indenture and such Securities. As used herein, "U.S. Government Obligation"
means (x) any security which is (i) a direct obligation of the United States of
America for the payment of which the full faith and credit of the United States
of America is pledged or (ii) an obligation of a Person controlled or supervised
by and acting as an agency or instrumentality of the United States of America
the payment of which is unconditionally guaranteed as a full faith and credit
obligation by the United States of America, which, in either case (i) or (ii),
is not callable or redeemable at the option of the issuer thereof, and (y) any
depositary receipt issued by a bank (as defined in Section 3(a)(2) of the
Securities Act) as custodian with respect to any U.S. Government Obligation
which is specified in Clause (x) above and held by such bank for the account of
the holder of such depositary receipt, or with respect to any specific payment
of principal of or interest on any U.S. Government Obligation which is so
specified and held, provided that (except as required by law) such custodian is
not authorized to make any deduction from the amount payable to the holder of
such depositary receipt from any amount received by the custodian in respect of
the U.S. Government Obligation or the specific payment of principal or interest
evidenced by such depositary receipt.

        (2) In the event of an election to have Section 1302 apply to any
Securities or any series of Securities, as the case may be, the Company shall
have delivered to the Trustee an Opinion of Counsel stating that (A) the Company
has received from, or there has been published by, the Internal Revenue Service
a ruling or (B) since the date of this instrument, there has been a change in
the applicable Federal income tax law, in either case (A) or (B) to the effect
that, and based thereon such opinion shall confirm that, the Holders of such
Securities will not recognize gain or loss for Federal income tax purposes as a


                                      -63-
<PAGE>   72

result of the deposit, Defeasance and discharge to be effected with respect to
such Securities and will be subject to Federal income tax on the same amount, in
the same manner and at the same times as would be the case if such deposit,
Defeasance and discharge were not to occur.

        (3) In the event of an election to have Section 1303 apply to any
Securities or any series of Securities, as the case may be, the Company shall
have delivered to the Trustee an Opinion of Counsel to the effect that the
Holders of such Securities will not recognize gain or loss for Federal income
tax purposes as a result of the deposit and Covenant Defeasance to be effected
with respect to such Securities and will be subject to Federal income tax on the
same amount, in the same manner and at the same times as would be the case if
such deposit and Covenant Defeasance were not to occur.

        (4) The Company shall have delivered to the Trustee an Officers'
Certificate to the effect that neither such Securities nor any other Securities
of the same series, if then listed on any securities exchange, will be delisted
as a result of such deposit.

        (5) No event which is, or after notice or lapse of time or both would
become, an Event of Default with respect to such Securities or any other
Securities shall have occurred and be continuing at the time of such deposit or,
with regard to any such event specified in Sections 501(5) and (6), at any time
on or prior to the 90th day after the date of such deposit (it being understood
that this condition shall not be deemed satisfied until after such 90th day).

        (6) Such Defeasance or Covenant Defeasance shall not cause the Trustee
to have a conflicting interest within the meaning of the Trust Indenture Act
(assuming all Securities are in default within the meaning of such Act).

        (7) Such Defeasance or Covenant Defeasance shall not result in a breach
or violation of, or constitute a default under, any other agreement or
instrument to which the Company is a party or by which it is bound.

        (8) Such Defeasance or Covenant Defeasance shall not result in the trust
arising from such deposit constituting an investment company within the meaning
of the Investment Company Act unless such trust shall be registered under such
Act or exempt from registration thereunder.

        (9) At the time of such deposit, (A) no default in the payment of any
principal of or premium or interest on any Senior Debt shall have occurred and
be continuing, (B) no event of default with respect to any Senior Debt shall
have resulted in such Senior Debt becoming, and continuing to be, due and
payable prior to the date on which it would otherwise have become due and
payable (unless payment of such Senior Debt has been made or duly provided for),
and (C) no other event of default with respect to any Senior Debt shall have
occurred and be continuing permitting (after notice or lapse of time or both)
the holders of such Senior Debt (or a trustee on behalf of such holders) to
declare such Senior Debt due and payable prior to the date on which it would
otherwise have become due and payable.

                                      -64-
<PAGE>   73

        (10) The Company shall have delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent with respect to such Defeasance or Covenant Defeasance have been
complied with.

SECTION 1305.          DEPOSITED MONEY AND U.S. GOVERNMENT OBLIGATIONS TO BE
                       HELD IN TRUST; MISCELLANEOUS PROVISIONS.

        Subject to the provisions of the last paragraph of Section 1003, all
money and U.S. Government Obligations (including the proceeds thereof) deposited
with the Trustee or other qualifying trustee (solely for purposes of this
Section and Section 1306, the Trustee and any such other trustee are referred to
collectively as the "Trustee") pursuant to Section 1304 in respect of any
Securities shall be held in trust and applied by the Trustee, in accordance with
the provisions of such Securities and this Indenture, to the payment, either
directly or through any such Paying Agent (including the Company acting as its
own Paying Agent) as the Trustee may determine, to the Holders of such
Securities, of all sums due and to become due thereon in respect of principal
and any premium and interest, but money so held in trust need not be segregated
from other funds except to the extent required by law. Money and U.S. Government
Obligations so held in trust shall not be subject to the provisions of Article
Fifteen.

        The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the U.S. Government Obligations
deposited pursuant to Section 1304 or the principal and interest received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of Outstanding Securities.

        Anything in this Article to the contrary notwithstanding, the Trustee
shall deliver or pay to the Company from time to time upon Company Request any
money or U.S. Government Obligations held by it as provided in Section 1304 with
respect to any Securities which, in the opinion of a nationally recognized firm
of independent public accountants expressed in a written certification thereof
delivered to the Trustee, are in excess of the amount thereof which would then
be required to be deposited to effect the Defeasance or Covenant Defeasance, as
the case may be, with respect to such Securities.

SECTION 1306.          REINSTATEMENT.

        If the Trustee or the Paying Agent is unable to apply any money in
accordance with this Article with respect to any Securities by reason of any
order or judgment of any court or governmental authority enjoining, restraining
or otherwise prohibiting such application, then the obligations under this
Indenture and such Securities from which the Company has been discharged or
released pursuant to Section 1302 or 1303 shall be revived and reinstated as
though no deposit had occurred pursuant to this Article with respect to such
Securities, until such time as the Trustee or Paying Agent is permitted to apply
all money held in trust pursuant to Section 1305 with respect to such Securities
in accordance with this Article; provided, however, that if the Company makes
any payment of principal of or any premium or interest on any such Security
following such reinstatement of its obligations, the Company shall be subrogated
to the rights (if any) of the Holders of such Securities to receive such payment
from the money so held in trust.

                                      -65-
<PAGE>   74
                                ARTICLE FOURTEEN

                     CONVERSION AND EXCHANGE OF SECURITIES

SECTION 1401.          APPLICABILITY OF ARTICLE.

        The provisions of this Article shall be applicable to the Securities of
any series which are convertible or exchangeable into shares of Common Stock of
the Company, and the issuance of such shares of Common Stock upon the conversion
of such Securities, except as otherwise specified as contemplated by Section 301
for the Securities of such series.

SECTION 1402.          EXERCISE OF CONVERSION AND EXCHANGE PRIVILEGE.

        In order to exercise a conversion or exchange privilege, the Holder of a
Security of a series with such a privilege shall surrender such Security to the
Company at the office or agency maintained for that purpose pursuant to Section
1002, accompanied by a duly executed conversion or exchange notice to the
Company substantially in the form set forth in Section 206 stating that the
Holder elects to convert or exchange such Security or a specified portion
thereof. Such notice shall also state, if different from the name and address of
such Holder, the name or names (with address) in which the certificate or
certificates for shares of Common Stock which shall be issuable on such
conversion or exchange shall be issued. Securities surrendered for conversion or
exchange shall (if so required by the Company or the Trustee) be duly endorsed
by or accompanied by instruments of transfer in forms satisfactory to the
Company and the Trustee duly executed by the registered Holder or its attorney
duly authorized in writing; and Securities so surrendered for conversion or
exchange (in whole or in part) during the period from the close of business on
any Regular Record Date to the opening of business on the next succeeding
Interest Payment Date (excluding Securities or portions thereof called for
redemption during the period beginning at the close of business on a Regular
Record Date and ending at the opening of business on the first Business Day
after the next succeeding Interest Payment Date, or if such Interest Payment
Date is not a Business Day, the second such Business Day) shall also be
accompanied by payment in 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 then being converted or exchanged, and such interest shall be
payable to such registered Holder notwithstanding the conversion or exchange of
such Security, subject to the provisions of Section 307 relating to the payment
of Defaulted Interest by the Company. As promptly as practicable after the
receipt of such notice and of any payment required pursuant to a Board
Resolution and, subject to Section 303, set forth, or determined in the manner
provided, in an Officers' Certificate, or established in one or more indentures
supplemental hereto setting forth the terms of such series of Security, and the
surrender of such Security in accordance with such reasonable regulations as the
Company may prescribe, the Company shall issue and shall deliver, at the office
or agency at which such Security is surrendered, to such Holder or on its
written order, a certificate or certificates for the number of full shares of
Common Stock issuable upon the conversion or exchange of such Security (or
specified portion thereof), in accordance with the provisions of such Board
Resolution, Officers' Certificate or supplemental indenture, and cash as
provided therein in respect of any fractional share of such Common Stock
otherwise issuable upon such conversion or exchange. Such conversion or exchange
shall be deemed to have been effected immediately prior to the close of business
on the date on which such notice


                                      -66-
<PAGE>   75

and such payment, if required, shall have been received in proper order for
conversion or exchange by the Company and such Security shall have been
surrendered as aforesaid (unless such Holder shall have so surrendered such
Security and shall have instructed the Company to effect the conversion or
exchange on a particular date following such surrender and such Holder shall be
entitled to convert or exchange such Security on such date, in which case such
conversion or exchange shall be deemed to be effected immediately prior to the
close of business on such date) and at such time the rights of the Holder of
such Security as such Security Holder shall cease and the person or persons in
whose name or names any certificate or certificates for shares of Common Stock
of the Company shall be issuable upon such conversion or exchange shall be
deemed to have become the Holder or Holders of record of the shares represented
thereby. Except as set forth above and subject to the final paragraph of Section
307, no payment or adjustment shall be made upon any conversion or exchange on
account of any interest accrued on the Securities (or any part thereof)
surrendered for conversion or exchange or on account of any dividends on the
Common Stock of the Company issued upon such conversion or exchange.

        In the case of any Security which is converted or exchanged in part
only, upon such conversion or exchange the Company shall execute and the Trustee
shall authenticate and deliver to or on the order of the Holder thereof, at the
expense of the Company, a new Security or Securities of the same series, of
authorized denominations, in aggregate principal amount equal to the unconverted
or unexchanged portion of such Security.

SECTION 1403.          NO FRACTIONAL SHARES.

        No fractional share of Common Stock of the Company shall be issued upon
conversions or exchanges of Securities of any series. If more than one Security
shall be surrendered for conversion or exchange at one time by the same Holder,
the number of full shares which shall be issuable upon conversion or exchange
shall be computed on the basis of the aggregate principal amount of the
Securities (or specified portions thereof to the extent permitted hereby) so
surrendered. If, except for the provisions of this Section 1403, any Holder of a
Security or Securities would be entitled to a fractional share of Common Stock
of the Company upon the conversion or exchange of such Security or Securities,
or specified portions thereof, the Company shall pay to such Holder an amount in
cash equal to the current market value of such fractional share computed, (i) if
such Common Stock is listed or admitted to unlisted trading privileges on a
national securities exchange or market, on the basis of the last reported sale
price regular way on such exchange or market on the last trading day prior to
the date of conversion or exchange upon which such a sale shall have been
effected, or (ii) if such Common Stock is not at the time so listed or admitted
to unlisted trading privileges on a national securities exchange or market, on
the basis of the average of the bid and asked prices of such Common Stock in the
over-the-counter market, on the last trading day prior to the date of conversion
or exchange, as reported by the National Quotation Bureau, Incorporated or
similar organization if the National Quotation Bureau, Incorporated is no longer
reporting such information, or if not so available, the fair market price as
determined by the Board of Directors. For purposes of this Section, "trading
day" shall mean each Monday, Tuesday, Wednesday, Thursday and Friday other than
any day on which the Common Stock is not traded on the Nasdaq National Market,
or if the Common Stock is not traded on the Nasdaq National Market, on the
principal exchange or market on which the Common Stock is traded or quoted.

                                      -67-
<PAGE>   76

SECTION 1404.          ADJUSTMENT OF CONVERSION AND EXCHANGE PRICE.

        The conversion price of Securities of any series that is convertible or
exchangeable into Common Stock of the Company shall be adjusted for any stock
dividends, stock splits, reclassifications, combinations or similar transactions
in accordance with the terms of the supplemental indenture or Board Resolutions
setting forth the terms of the Securities of such series.

        Whenever the conversion or exchange price is adjusted, the Company shall
compute the adjusted conversion or exchange price in accordance with terms of
the applicable Board Resolution or supplemental indenture and shall prepare an
Officers' Certificate setting forth the adjusted conversion or exchange price
and showing in reasonable detail the facts upon which such adjustment is based,
and such certificate shall forthwith be filed at each office or agency
maintained for the purpose of conversion or exchange of Securities pursuant to
Section 1002 and, if different, with the Trustee. The Company shall forthwith
cause a notice setting forth the adjusted conversion or exchange price to be
mailed, first class postage prepaid, to each Holder of Securities of such series
at its address appearing on the Security Register and to any conversion or
exchange agent other than the Trustee.

SECTION 1405.          NOTICE OF CERTAIN CORPORATE ACTIONS.

        In case:

        (1) the Company shall declare a dividend (or any other distribution) on
its Common Stock payable otherwise than in cash out of its retained earnings
(other than a dividend for which approval of any shareholders of the Company is
required) that would require an adjustment pursuant to Section 1404; or

        (2) the Company shall authorize the granting to all or substantially all
of 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
(other than any such grant for which approval of any shareholders of the Company
is required); or

        (3) of any reclassification of the Common Stock of the Company (other
than a subdivision or combination of its outstanding shares of Common Stock, or
of any consolidation, merger or share exchange to which the Company is a party
and for which approval of any shareholders of the Company is required), or of
the sale of all or substantially all of the assets of the Company; or

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

then the Company shall cause to be filed with the Trustee, and shall cause to be
mailed to all Holders at their last addresses as they shall appear in the
Security Register, at least 20 days (or 10 days in any case specified in Clause
(1) or (2) above) prior to the applicable record date hereinafter specified, a
notice stating (i) 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,



                                      -68-
<PAGE>   77

or (ii) the date on which such reclassification, consolidation, merger, share
exchange, sale, 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, share exchange, sale, dissolution, liquidation or winding
up. If at any time the Trustee shall not be the conversion or exchange agent, a
copy of such notice shall also forthwith be filed by the Company with the
Trustee.

SECTION 1406.       RESERVATION OF SHARES OF 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 or exchange of Securities, the full number
of shares of Common Stock of the Company then issuable upon the conversion or
exchange of all outstanding Securities of any series that has conversion or
exchange rights.

SECTION 1407.      PAYMENT OF CERTAIN TAXES UPON CONVERSION AND EXCHANGE.

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

SECTION 1408.      NONASSESSABILITY.

        The Company covenants that all shares of its Common Stock which may be
issued upon conversion or exchange of Securities will upon issue in accordance
with the terms hereof be duly and validly issued and fully paid and
nonassessable.

SECTION 1409.      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 of a series then Outstanding that is convertible or exchangeable
into Common Stock of the Company shall have the right thereafter (which right
shall be the exclusive conversion right thereafter available to said Holder),
during the period such Security shall be convertible or exchangeable, to convert
or exchange such Security only into the kind and amount of securities, cash


                                      -69-
<PAGE>   78

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 or exchanged
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 (a "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 1409 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 deemed to be the
kind and amount so receivable per share by a plurality of the Non-electing
Shares). 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 or in accordance with the terms of the supplemental indenture or
Board Resolutions setting forth the terms of such adjustments. The above
provisions of this Section 1409 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 of a series that is convertible or exchangeable into
Common Stock of the Company as provided in Section 106 promptly upon such
execution.

        Neither the Trustee nor any conversion or exchange agent, if any, 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 of a series convertible or exchangeable into Common Stock
of the Company upon the conversion or exchange 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 1410.          DUTIES OF TRUSTEE REGARDING CONVERSION AND EXCHANGE.

        Neither the Trustee nor any conversion agent shall at any time be under
any duty or responsibility to any Holder of Securities of any series that is
convertible or exchangeable into Common Stock of the Company to determine
whether any facts exist which may require any adjustment of the conversion or
exchange price, or with respect to the nature or extent of any such adjustment
when made, or with respect to the method employed, whether herein or in any
supplemental indenture (or whether any provisions of any supplemental indenture
are correct), any resolutions of the Board of Directors or written instrument
executed by one or more officers of the Company provided to be employed in
making the same. Neither the Trustee nor any conversion or exchange agent shall
be accountable with respect


                                      -70-
<PAGE>   79

to the validity or value (or the kind or amount) of any shares of Common Stock
of the Company, or of any securities or property, which may at any time be
issued or delivered upon the conversion or exchange of any Securities and
neither the Trustee nor any conversion or exchange agent makes any
representation with respect thereto. Subject to the provisions of Section 601,
neither the Trustee nor any conversion or exchange agent shall be responsible
for any failure of the Company to issue, transfer or deliver any shares of its
Common Stock or stock certificates or other securities or property upon the
surrender of any Security for the purpose of conversion or to comply with any of
the covenants of the Company contained in this Article Fourteen or in the
applicable supplemental indenture, resolutions of the Board of Directors or
written instrument executed by one or more duly authorized officers of the
Company.

SECTION 1411.          REPAYMENT OF CERTAIN FUNDS UPON CONVERSION AND EXCHANGE .

        Any funds which at any time shall have been deposited by the Company or
on its behalf with the Trustee or any other paying agent for the purpose of
paying the principal of, and premium, if any, and interest, if any, on any of
the Securities (including, but not limited to, funds deposited for the sinking
fund referred to in Article Twelve hereof and funds deposited pursuant to
Article Thirteen hereof) and which shall not be required for such purposes
because of the conversion or exchange of such Securities as provided in this
Article Fourteen shall after such conversion or exchange be repaid to the
Company by the Trustee upon the Company's written request.

                                 ARTICLE FIFTEEN

                           SUBORDINATION OF SECURITIES

SECTION 1501.          SECURITIES SUBORDINATE TO SENIOR DEBT.

        Except as otherwise provided in a supplemental indenture or pursuant to
Section 301, the Company covenants and agrees, and each Holder of a Security, by
its acceptance thereof, likewise covenants and agrees, that, to the extent and
in the manner hereinafter set forth in this Article, the indebtedness
represented by the Securities and the payment of the principal of and any
premium and interest on each and all of the Securities or on the account of the
purchase, redemption or other acquisition of the Securities or constituting a
sinking fund or defeasance payment by the Company to the Trustee or any Paying
Agent, as the case may be, in accordance with Article Twelve or Article
Thirteen, respectively, on the Securities are hereby expressly made subordinate
and subject in right of payment to the prior payment in full of all Senior Debt.
Notwithstanding the foregoing, this Article Fifteen shall not apply to the
application of any amounts deposited with the Trustee or any Paying Agent
pursuant to any sinking fund requirement or defeasance which, at the time such
amounts were deposited with the Trustee or Paying Agent, as the case may be,
such deposits were not prohibited by the provisions of this Article Fifteen
("Previous Payments").

        The expressions "prior payment in full," "payment in full" and "paid in
full" and any other similar term or phrase when used in this Article Fifteen
with respect to Senior Debt shall mean in the case of Senior Debt consisting of
contingent obligations in respect of letters of credit (or local guaranties, as
applicable), bankers' acceptances, interest rate protection agreements or
currency exchange or purchase


                                      -71-
<PAGE>   80

agreements, the setting apart of cash or other payment acceptable to holders of
such Senior Debt sufficient to discharge such portion of Senior Debt in an
account for the exclusive benefit of the holders thereof, in which account such
holders shall be granted by the Company a first priority perfected security
interest, which first priority perfected security interest shall have been
retained by the holders of Senior Debt for a period of time in excess of all
applicable preference or other similar periods, if any, under applicable
bankruptcy, insolvency or creditors' rights laws.

SECTION 1502.          PAYMENT OVER OF PROCEEDS UPON DISSOLUTION, ETC.

        In the event of (a) any insolvency or bankruptcy case or proceeding, or
any receivership, liquidation, reorganization, debt restructuring 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 Debt shall be entitled to
receive payment in full of all amounts due or to become due on or in respect of
all Senior Debt in cash or other payment satisfactory to the holders of Senior
Debt before the Holders of the Securities are entitled to receive any payment on
account of principal of or any premium or interest on the Securities or on the
account of the purchase, redemption or other acquisition of Securities or
constituting a sinking fund or defeasance payment by the Company to the Trustee
or the Paying Agent, as the case may be, in accordance with Article Twelve or
Article Thirteen, respectively, on the Securities (other than Previous
Payments), and to that end the holders of Senior Debt or their representative or
representatives or the trustee or trustees under any indenture under which any
instruments evidencing any of such Senior Debt may have been issued 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, to the
extent necessary to pay all Senior Debt in full in cash or other payment
satisfactory to the holders of Senior Debt, after giving effect to any
concurrent payment or distribution to or for the holders of other Senior Debt.

        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, property or securities, before all Senior Debt is paid in full
in cash or other payment satisfactory to the holders of Senior Debt 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 Senior Debt
remaining unpaid, to the extent necessary to pay all Senior Debt in full, after
giving effect to any concurrent payment or distribution to or for the holders of
Senior Debt.

        For purposes of this Article only, the words "cash, property or
securities" 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 are subordinated
in right of payment to all Senior Debt which may at the time be outstanding to
substantially the same extent


                                      -72-
<PAGE>   81

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 Eight 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 Eight.

SECTION 1503.      PRIOR PAYMENT TO SENIOR DEBT UPON ACCELERATION OF SECURITIES.

        In the event that any Securities are declared due and payable before
their Stated Maturity, then and in such event the holders of the Senior Debt
outstanding at the time such Securities so become due and payable shall be
entitled to receive payment in full in cash or other payment satisfactory to the
holders of Senior Debt of all amounts due or to become due on or in respect of
all Senior Debt before the Holders of the Securities are entitled to receive any
payment by the Company on account of the principal of or any premium or interest
on the Securities or on account of the purchase, redemption or other acquisition
of Securities or constituting a sinking fund or defeasance payment by the
Company to the Trustee or the Paying Agent, as the case may be, in accordance
with Article Twelve or Article Thirteen, respectively, on the Securities (other
than Previous Payments); provided, however, that nothing in this Section shall
prevent the satisfaction of any sinking fund payment in accordance with Article
Twelve by delivering and crediting pursuant to Section 1202 Securities which
have been acquired (upon redemption or otherwise) prior to such declaration of
acceleration or which have been converted pursuant to Article Fourteen; provided
further that the Holders of the Securities shall be entitled to receive payment
on the Securities to the extent such acceleration is rescinded in accordance
with the terms of this Indenture. If the payment of Securities is accelerated
because of an Event of Default, the Company shall promptly notify holders of
Senior Debt of the acceleration.

        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.

        The provisions of this Section shall not apply to any payment with
respect to which Section 1502 would be applicable.



                                      -73-
<PAGE>   82

SECTION 1504.          NO PAYMENT IN CERTAIN CIRCUMSTANCES.

        The Company may not make any payment of principal of, or premium, if
any, or interest on the Securities on or account of the purchase, redemption or
other acquisition of Securities or constituting a sinking fund or defeasance
payment by the Company to the Trustee or the Paying Agent, as the case may be,
in accordance with Article Twelve or Article Thirteen, respectively, on the
Securities (other than Previous Payments), if:

                  (i) a default in the payment of principal, premium, if any, or
        interest (including a default under any redemption or repurchase
        obligation) or other amounts with respect to any Senior Debt occurs and
        is continuing (or, in the case of Senior Debt for which there is a
        period of grace, in the event of such a default that continues beyond
        the period of grace, if any, specified in the instrument or lease
        evidencing such Senior Debt) unless and until such default shall have
        been cured or waived or shall have ceased to exist; or

                  (ii) a default, other than a payment default, on any
        Designated Senior Debt occurs and is continuing that then permits
        holders of such Designated Senior Debt to accelerate its maturity and
        the Trustee receives a notice of the default (a "Payment Blockage
        Notice") from the Company, a holder such Designated Senior Debt or a
        Representative of such Designated Senior Debt.

; provided, however, that nothing in this Section shall prevent the satisfaction
of any sinking fund payment in accordance with Article Twelve by delivering and
crediting pursuant to Section 1202 Securities which have been acquired (upon
redemption or otherwise) prior to such declaration of acceleration or which have
been converted pursuant to Article Fourteen.

        If the Trustee receives any Payment Blockage Notice pursuant to clause
(ii) above, no subsequent Payment Blockage Notice shall be effective for
purposes of this Section unless and until at least 365 days shall have elapsed
since the initial effectiveness of the immediately prior Payment Blockage
Notice. No nonpayment default that existed or was continuing on the date of
delivery of any Payment Blockage Notice to the Trustee (unless such default was
waived, cured or otherwise ceased to exist and thereafter subsequently
reoccurred) shall be, or be made, the basis for a subsequent Payment Blockage
Notice.

        The Company may and shall resume payments on and distributions in
respect of the Securities and may purchase, redeem or otherwise acquire
Securities and may make a sinking fund or defeasance payment to the Trustee or
Paying Agent, as the case may be, in accordance with Article Twelve or Article
Thirteen, respectively, on the Securities, upon the earlier of:

        (1) the date upon which the default is cured or waived or ceases to
exist, or

        (2) in the case of a default referred to in clause (ii) above, 179 days
after the Payment Blockage Notice is received,



                                      -74-
<PAGE>   83

unless this Article Fifteen otherwise prohibits the payment, distribution,
purchase, redemption, acquisition, sinking fund payment or defeasance payment at
the time of such payment, distribution, purchase, redemption, acquisition,
sinking fund payment or defeasance payment (including, without limitation, in
the case of a default referred to in clause (ii) above, as a result of a payment
default with respect to the applicable Senior Debt as a consequence of the
acceleration of the maturity thereof or otherwise).

        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.

        The provisions of this Section shall not apply to any payment with
respect to which Section 1502 would be applicable.

SECTION 1505.          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, debt restructuring, assignment for the benefit of creditors or other
marshaling of assets and liabilities of the Company referred to in Section 1502
or under the conditions described in Section 1503 or 1504, from making payments
at any time of principal of and any premium or interest on the Securities or on
the account of the purchase, redemption or other acquisition of 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 any premium or interest on
the Securities or on the account of the purchase, redemption or other
acquisition of 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 1506.          SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR DEBT.

        Subject to the payment in full of all Senior Debt, the Holders of the
Securities shall be subrogated to the rights of the holders of such Senior Debt
to receive payments and distributions of cash, property and securities
applicable to the Senior Debt until the principal of and any premium 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 Debt 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 Debt by Holders of the Securities or the Trustee, shall, as among the
Company, its creditors other than holders of Senior Debt and the Holders of the
Securities, be deemed to be a payment or distribution by the Company to or on
account of the Senior Debt.



                                      -75-
<PAGE>   84

SECTION 1507.          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 Debt 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 Debt and the Holders of the Securities, the obligation of the Company,
which is absolute and unconditional (and which, subject to the rights under this
Article of the holders of Senior Debt, is intended to rank equally with all
other general obligations of the Company), to pay to the Holders of the
Securities the principal of and any premium 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 Debt;
or (c) prevent the Trustee or the Holder of any Security from exercising all
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 Debt to receive cash, property and securities otherwise payable or
deliverable to the Trustee or such Holder.

SECTION 1508.          TRUSTEE TO EFFECTUATE SUBORDINATION.

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

SECTION 1509.          NO WAIVER OF SUBORDINATION PROVISIONS.

        No right of any present or future holder of any Senior Debt to enforce
subordination as herein provided shall at any time in any way be prejudiced or
impaired by any act or failure to act on the part of the Company or by any act
or failure to act, in good faith, by any such holder, 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 Debt 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 Debt, 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 Debt, or otherwise
amend or supplement in any manner Senior Debt or any instrument evidencing the
same or any agreement under which Senior Debt is outstanding; (ii) sell,
exchange, release or otherwise dispose of any property pledged, mortgaged or
otherwise securing Senior Debt; (iii) release any Person liable in any manner
for the collection of Senior Debt; and (iv) exercise or refrain from exercising
any rights against the Company and any other Person.



                                      -76-
<PAGE>   85

SECTION 1510.     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 Debt or from any trustee or other Representative
therefor; and, prior to the receipt of any such written notice, the Trustee,
subject to the provisions of Section 601, shall be entitled 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 at least two Business
Days 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 any premium 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 601, 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 Debt (or a trustee or other Representative
therefor) to establish that such notice has been given by a holder of Senior
Debt (or a trustee or other 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 Debt 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 Debt 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 1511.    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 601, 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 Debt 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.



                                      -77-
<PAGE>   86

SECTION 1512.          TRUSTEE NOT FIDUCIARY FOR HOLDERS OF SENIOR DEBT.

        The Trustee, in its capacity as trustee under this Indenture, shall not
be deemed to owe any fiduciary duty to the holders of Senior Debt 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 Debt shall be
entitled by virtue of this Article or otherwise. With respect to the holders of
Senior Debt, the Trustee undertakes to perform or to observe only such of its
covenants or obligations as are specifically set forth in this Article and no
implied covenants or obligations with respect to holders of Senior Debt shall be
read into this Indenture against the Trustee.

SECTION 1513.          RIGHTS OF TRUSTEE AS HOLDER OF SENIOR DEBT; 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 Debt which may at
any time be held by it, to the same extent as any other holder of Senior Debt,
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 607.

SECTION 1514.          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 1512 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

SECTION 1515.          CERTAIN CONVERSIONS 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
Fourteen shall not be deemed to constitute a payment or distribution on account
of the principal of or any premium or interest on Securities or on account of
the purchase, redemption or other acquisition of Securities, and (2) the
payment, issuance or delivery of cash, property or securities (other than junior
securities and cash paid for fractional shares) 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 (b) securities of the
Company which are subordinated in right of payment to all Senior Debt 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.



                                      -78-
<PAGE>   87

SECTION 1516.        OBLIGATIONS OF COMPANY AND RIGHT TO CONVERT UNCONDITIONAL.

        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 Debt 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 any premium and interest on
the Securities as and when the same shall become due and payable in accordance
with their terms, or affect the relative rights of the Holders of the Securities
and creditors of the Company other than the holders of Senior Debt, nor shall
anything herein or therein prevent the Trustee or the Holder of any Securities
from exercising all 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 Debt in respect of cash, property or securities of the Company
received upon the exercise of any such remedy.

        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 Debt 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 Fourteen (if applicable).

SECTION 1517.          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 Debt, whether such Senior Debt
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 Debt and such
holder of Senior Debt shall be deemed conclusively to have relied on such
subordination provisions in acquiring and continuing to hold, or in continuing
to hold, such Senior Debt, and no amendment or modification of the provisions
contained herein shall diminish the rights of such holders of Senior Debt unless
such holders shall have agreed in writing hereto.



                                      -79-
<PAGE>   88

        IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed all as of the day and year first above written.

                                             SUN MICROSYSTEMS, INC.



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








                                             THE BANK OF NEW YORK, as Trustee


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





<PAGE>   1
                                                                     Exhibit 4.3

                             SUN MICROSYSTEMS, INC.

                        OFFICERS' CERTIFICATE PURSUANT TO
                          SECTION 301 OF THE INDENTURE

                                 AUGUST 4, 1999

         Michael H. Morris and George Reyes do hereby certify that we are the
duly appointed Vice President, General Counsel and Secretary and Vice President
and Corporate Treasurer, respectively, of Sun Microsystems, Inc., a Delaware
corporation. We further certify, pursuant to resolutions of the Board of
Directors and the Debt Securities Committee adopted on June 16, 1999 (a copy of
which is attached hereto as Exhibit A-1), that pursuant to Section 301 of the
Indenture, dated as of August 1, 1999 (the "Indenture") between the Company and
The Bank of New York, as Trustee, four series of debt securities of the Company
are hereby established, each with the following respective terms and provisions:

I.       7.00% Senior Notes due 2002.

         1. The title of such series of Securities shall be the "7.00% Senior
Notes due 2002" (the "2002 Notes"). The price at which the 2002 Notes shall be
issued is 99.980%.

         2. The aggregate principal amount of the 2002 Notes that may be
authenticated and delivered under the Indenture shall be $200,000,000 (except
for 2002 Notes authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other 2002 Notes pursuant to Sections 304, 305,
306, 906 and 1107 of the Indenture, and except for any 2002 Notes which,
pursuant to Section 303 of the Indenture, shall be deemed never to have been
authenticated and delivered thereunder).

         3. Interest on the 2002 Notes shall be payable to the Persons in whose
names the 2002 Notes (or one or more Predecessor Securities) are registered at
the close of business on the Regular Record Date for such interest.

         4. The Stated Maturity of the 2002 Notes on which the principal thereof
is due and payable is August 15, 2002.

         5. The 2002 Notes shall bear interest at 7.00% per annum from August 4,
1999, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable semiannually on February 15 and August 15 of
each year (each, an "Interest Payment Date"), commencing February 15, 2000, to
the Person in whose name the 2002 Note (or one or more Predecessor Securities)
is registered at the close of business on the Regular Record Date for such
interest, which shall initially be February 1 or August 1 (as the case may be),
whether or not a Business Day, immediately preceding such Interest Payment Date.
Interest on the 2002 Notes shall be calculated on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full six-month interest
period, on the actual number of days elapsed in that period.

<PAGE>   2

         6. The 2002 Notes shall be issued in the form of one or more Global
Note or Notes (the "Global 2002 Note" or "Global 2002 Notes"). So long as the
2002 Notes shall be issued in whole in the form of a Global 2002 Note, the
principal of, premium, if any, and interest, if any, on the 2002 Notes shall be
paid in immediately available funds to the Depositary or a nominee of the
Depositary. If at any time the 2002 Notes are no longer represented by a Global
2002 Note and are issued in definitive form ("Certificated 2002 Notes"), then
the principal of, premium, if any, and interest, if any, on each Certificated
2002 Note at Maturity shall be paid to the Holder upon surrender of such
Certificated 2002 Note at the office or agency maintained by the Company in the
Borough of Manhattan, The City of New York (which shall initially be the office
of The Bank of New York), provided that such Certificated 2002 Note is
surrendered to the Trustee, acting as Paying Agent, in time for the Paying Agent
to make such payments in such funds in accordance with its normal procedures.
Payments of interest with respect to Certificated 2002 Notes other than at
Maturity may, at the option of the Company, be made by check mailed to the
address of the Person entitled thereto as it appears on the Security Register on
the relevant Regular Record Date or by wire transfer in same day funds to such
account as may have been appropriately designated to the Paying Agent by such
Person in writing not later than such relevant Regular Record Date. Each payment
of principal, premium, if any, and interest, if any, shall be made in such coin
or currency of the United States of America as at the time of payment is legal
tender for payment of public and private debts. Transfer of the 2002 Notes shall
be registrable on the Securities Register upon the surrender of the 2002 Notes
for registration of transfer at the office or agency maintained by the Company
in the Borough of Manhattan, The City of New York (which shall initially be the
office of the Trustee).

         7. The 2002 Notes are subject to redemption upon receipt of notice by
first-class mail at least 30 days and not more than 60 days prior to the
Redemption Date, at the option of the Company at any time, as a whole or in
part, at a Redemption Price equal to the greater of 100% of (i) the principal
amount of the 2002 Note to be redeemed or (ii) an amount, as determined by the
Quotation Agent, equal to the sum of the present values of the remaining
scheduled payments of principal and interest on the 2002 Notes to be redeemed,
not including any portion of payments of interest accrued as of the Redemption
Date, discounted to the Redemption Date on a semi-annual basis, assuming a
360-day year comprised of twelve 30-day months, at the adjusted treasury rate
plus ten basis points plus, in each case, accrued and unpaid interest on the
principal amount being redeemed to the Redemption Date; provided, however, that
with respect to interest payments that are due on or prior to the Redemption
Date, the Company will make payments of interest to the Holders of record of the
2002 Notes at the close of business on the regular Record Date.

         "Adjusted Treasury Rate" means, with respect to any Redemption Date,
the rate per annum equal to the semi-annual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue,
expressed as a percentage of its principal amount, equal to the Comparable
Treasury Price for that Redemption Date.

         "Comparable Treasury Issue" means the United States treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term of the 2002 Notes to be redeemed that would be utilized, at the time of
selection and in accordance with customary financial


                                       2
<PAGE>   3

practice, in pricing new issues of corporate debt securities of comparable
maturity to the remaining term of the 2002 Notes.

         "Comparable Treasury Rate" means, with respect to any Redemption Date,
(i) the average of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, on the third
Business Day preceding such Redemption Date, as set forth by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for the U.S.
Government Securities," or (ii) if such release, or any successor release, is
not published or does not contain such prices on such Business Day, (1) the
average of the Reference Treasury Dealer Quotations for that Redemption Date,
after excluding the highest and lowest Reference Treasury Dealer Quotations, or
(2) if the Trustee obtains fewer that four Reference Treasury Dealer Quotations
for the Redemption Date, the average of the Reference Treasury Dealer Quotations
obtained, as determined by the Quotation Agent.

         "Quotation Agent" means the Reference Treasury Dealer appointed by the
Company.

         "Reference Treasury Dealer" means (i) Goldman, Sachs & Co. or its
successors; provided, however that if any of them ceases to be a primary U.S.
government securities dealer in New York City (a "Primary Treasury Dealer"), the
Company will substitute for it another Primary Treasury Dealer, and (ii) any
other Primary Treasury Dealer(s) selected by the Company.

         "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue, expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by the Reference Treasury Dealer at 5:00 p.m. on the
third Business Day preceding that Redemption Date.

         Unless the Company defaults in payment of the Redemption Price, no
interest will accrue on the 2002 Notes called for redemption for the period from
and after the Redemption Date.

         8. The 2002 Notes are not subject to any sinking fund or analogous
provisions. The 2002 Notes will not be redeemable at the option of the Holder
thereof prior to Maturity.

         9. The 2002 Notes shall be issuable only in denominations of $1,000 and
any integral multiple thereof.

         10. Except as stated in Section 7 above, the amount of payments of
principal of, or any premium or interest on, any 2002 Notes may not be
determined with reference to an index, formula or other method.

         11. The 2002 Notes may be purchased only in currency of the United
States and payment of principal of, premium, if any, and interest on the 2002
Notes will only be made in currency of the United States.


                                       3
<PAGE>   4

         12. The payment of principal of, premium, if any, or interest on the
2002 Notes will not be payable at the option of the Company or the Holder in any
currency or currency units other than in the currency of the United States.

         13. The entire principal amount of the 2002 Notes will be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502 of
the Indenture.

         14. The principal amount of the 2002 Notes will be determinable as of
any one or more dates prior to Stated Maturity.

         15. The defeasance and covenant defeasance provisions of Article
Thirteen of the Indenture will apply to the 2002 Notes.

         16. The 2002 Notes may not be converted into other securities or
property.

         17. The Depositary for the Global 2002 Note shall be The Depository
Trust Company, a New York Corporation ("DTC"). The 2002 Notes will be
represented by one Global 2002 Note registered in the name of DTC or CEDE & Co.,
as a nominee of DTC. Except as set forth in Section 305 of the Indenture, such
Global 2002 Note may be transferred, in whole and not in part, only to
Depositary or another nominee of Depositary.

         18. In addition to the Events of Default contained in the Indenture,
the following will be an Event of Default with respect to the 2002 Notes: (i)
failure to make any payment at maturity, including any applicable grace period,
in respect of indebtedness, which term means obligations (other than
non-recourse obligations or the 2002 Notes) of the Company for borrowed money or
evidenced by bonds, debentures, notes or similar instruments ("Indebtedness") in
an amount in excess of $50,000,000 and continuance of such failure or (ii) a
default with respect to any Indebtedness, which default results in the
acceleration of Indebtedness in an amount in excess of $50,000,000 without such
Indebtedness having been discharged or such acceleration having been cured,
waived, rescinded or annulled, in the case of (i) or (ii) above, for a period of
30 days after written notice thereof to the Company by the Trustee or to the
Company and the Trustee by the Holders of not less than 25% in principal amount
of 2002 Notes; provided, however, that if any such failure, default or
acceleration referred to in (i) or (ii) above shall cease or be cured, waived,
rescinded or annulled, then the Event of Default by reason thereof shall be
deemed likewise to have been cured.

         19. Sections 1008 and 1009 of the Indenture will apply to the 2002
Notes without variation.

         20. There are no additional terms for the 2002 Notes.


                                       4
<PAGE>   5

II.      7.35% Senior Notes due 2004.

         1. The title of such series of Securities shall be the "7.35% Senior
Notes due 2004" (the "2004 Notes"). The price at which the 2004 Notes shall be
issued is 99.988%.

         2. The aggregate principal amount of the 2004 Notes that may be
authenticated and delivered under the Indenture shall be $250,000,000 (except
for 2004 Notes authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other 2004 Notes pursuant to Sections 304, 305,
306, 906 and 1107 of the Indenture, and except for any 2004 Notes which,
pursuant to Section 303 of the Indenture, shall be deemed never to have been
authenticated and delivered thereunder).

         3. Interest on the 2004 Notes shall be payable to the Persons in whose
names the 2004 Notes (or one or more Predecessor Securities) are registered at
the close of business on the Regular Record Date for such interest.

         4. The Stated Maturity of the 2004 Notes on which the principal thereof
is due and payable is August 15, 2004.

         5. The 2004 Notes shall bear interest at 7.35% per annum from August 4,
1999, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable semiannually on February 15 and August 15 of
each year (each, an "Interest Payment Date"), commencing February 15, 2000, to
the Person in whose name the 2004 Note (or one or more Predecessor Securities)
is registered at the close of business on the Regular Record Date for such
interest, which shall initially be February 1 or August 1 (as the case may be),
whether or not a Business Day, immediately preceding such Interest Payment Date.
Interest on the 2004 Notes shall be calculated on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full six-month interest
period, on the actual number of days elapsed in that period.

         6. The 2004 Notes shall be issued in the form of one or more Global
Note or Notes (the "Global 2004 Note" or "Global 2004 Notes"). So long as the
2004 Notes shall be issued in whole in the form of a Global 2004 Note, the
principal of, premium, if any, and interest, if any, on the 2004 Notes shall be
paid in immediately available funds to the Depositary or a nominee of the
Depositary. If at any time the 2004 Notes are no longer represented by a Global
2004 Note and are issued in definitive form ("Certificated 2004 Notes"), then
the principal of, premium, if any, and interest, if any, on each Certificated
2004 Note at Maturity shall be paid to the Holder upon surrender of such
Certificated 2004 Note at the office or agency maintained by the Company in the
Borough of Manhattan, The City of New York (which shall initially be the
principal corporate trust office of The Bank of New York), provided that such
Certificated 2004 Note is surrendered to the Trustee, acting as Paying Agent, in
time for the Paying Agent to make such payments in such funds in accordance with
its normal procedures. Payments of interest with respect to Certificated 2004
Notes other than at Maturity may, at the option of the Company, be made by check
mailed to the address of the Person entitled thereto as it appears on the
Security Register on the relevant Regular Record Date or by wire transfer in
same day funds to such account as may have been appropriately designated to the
Paying


                                       5
<PAGE>   6

Agent by such Person in writing not later than such relevant Regular Record
Date. Each payment of principal, premium, if any, and interest, if any, shall be
made in such coin or currency of the United States of America as at the time of
payment is legal tender for payment of public and private debts. Transfer of the
2004 Notes shall be registrable on the Securities Register upon the surrender of
the 2004 Notes for registration of transfer at the office or agency maintained
by the Company in the Borough of Manhattan, The City of New York (which shall
initially be the principal corporate trust office of the Trustee).

         7. The 2004 Notes are subject to redemption upon receipt of notice by
first-class mail at least 30 days and not more than 60 days prior to the
Redemption Date, at the option of the Company at any time, as a whole or in
part, at a Redemption Price equal to the greater of 100% of (i) the principal
amount of the 2004 Note to be redeemed or (ii) an amount, as determined by the
Quotation Agent, equal to the sum of the present values of the remaining
scheduled payments of principal and interest on the 2004 Notes to be redeemed,
not including any portion of payments of interest accrued as of the Redemption
Date, discounted to the Redemption Date on a semi-annual basis, assuming a
360-day year comprised of twelve 30-day months, at the adjusted treasury rate
plus fifteen basis points plus, in each case, accrued and unpaid interest on the
principal amount being redeemed to the Redemption Date; provided, however, that
with respect to interest payments that are due on or prior to the Redemption
Date, the Company will make payments of interest to the Holders of record of the
2004 Notes at the close of business on the regular Record Date.

         "Adjusted Treasury Rate" means, with respect to any Redemption Date,
the rate per annum equal to the semi-annual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue,
expressed as a percentage of its principal amount, equal to the Comparable
Treasury Price for that Redemption Date.

         "Comparable Treasury Issue" means the United States treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term of the 2004 Notes to be redeemed that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of the 2004 Notes.

         "Comparable Treasury Rate" means, with respect to any Redemption Date,
(i) the average of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, on the third
Business Day preceding such Redemption Date, as set forth by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for the U.S.
Government Securities," or (ii) if such release, or any successor release, is
not published or does not contain such prices on such Business Day, (1) the
average of the Reference Treasury Dealer Quotations for that Redemption Date,
after excluding the highest and lowest Reference Treasury Dealer Quotations, or
(2) if the Trustee obtains fewer that four Reference Treasury Dealer Quotations
for the Redemption Date, the average of the Reference Treasury Dealer Quotations
obtained, as determined by the Quotation Agent.

         "Quotation Agent" means the Reference Treasury Dealer appointed by the
Company.


                                       6
<PAGE>   7

         "Reference Treasury Dealer" means (i) Goldman, Sachs & Co. or its
successors; provided, however that if any of them ceases to be a primary U.S.
government securities dealer in New York City (a "Primary Treasury Dealer"), the
Company will substitute for it another Primary Treasury Dealer, and (ii) any
other Primary Treasury Dealer(s) selected by the Company.

         "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue, expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by the Reference Treasury Dealer at 5:00 p.m. on the
third Business Day preceding that Redemption Date.

         Unless the Company defaults in payment of the Redemption Price, no
interest will accrue on the 2004 Notes called for redemption for the period from
and after the Redemption Date.

         8. The 2004 Notes are not subject to any sinking fund or analogous
provisions. The 2004 Notes will not be redeemable at the option of the Holder
thereof prior to Maturity.

         9. The 2004 Notes shall be issuable only in denominations of $1,000 and
any integral multiple thereof.

         10. Except as stated in Section 7 above, the amount of payments of
principal of, or any premium or interest on, any 2004 Notes may not be
determined with reference to an index, formula or other method.

         11. The 2004 Notes may be purchased only in currency of the United
States and payment of principal of, premium, if any, and interest on the 2004
Notes will only be made in currency of the United States.

         12. The payment of principal of, premium, if any, or interest on the
2004 Notes will not be payable at the option of the Company or the Holder in any
currency or currency units other than in the currency of the United States.

         13. The entire principal amount of the 2004 Notes will be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502 of
the Indenture.

         14. The principal amount of the 2004 Notes will be determinable as of
any one or more dates prior to Stated Maturity.

         15. The defeasance and covenant defeasance provisions of Article
Thirteen of the Indenture will apply to the 2004 Notes.

         16. The 2004 Notes may not be converted into other securities or
property.


                                       7
<PAGE>   8

         17. The Depositary for the Global 2004 Note shall be The Depository
Trust Company, a New York corporation ("DTC"). The 2004 Notes will be
represented by one Global 2004 Note registered in the name of DTC or CEDE & Co.,
as a nominee of DTC. Except as set forth in Section 305 of the Indenture, such
Global 2004 Note may be transferred, in whole and not in part, only to
Depositary or another nominee of Depositary.

         18. In addition to the Events of Default contained in the Indenture,
the following will be an Event of Default with respect to the 2004 Notes: (i)
failure to make any payment at maturity, including any applicable grace period,
in respect of indebtedness, which term means obligations (other than
non-recourse obligations or the 2004 Notes) of the Company for borrowed money or
evidenced by bonds, debentures, notes or similar instruments ("Indebtedness") in
an amount in excess of $50,000,000 and continuance of such failure or (ii) a
default with respect to any Indebtedness, which default results in the
acceleration of Indebtedness in an amount in excess of $50,000,000 without such
Indebtedness having been discharged or such acceleration having been cured,
waived, rescinded or annulled, in the case of (i) or (ii) above, for a period of
30 days after written notice thereof to the Company by the Trustee or to the
Company and the Trustee by the Holders of not less than 25% in principal amount
of 2004 Notes; provided, however, that if any such failure, default or
acceleration referred to in (i) or (ii) above shall cease or be cured, waived,
rescinded or annulled, then the Event of Default by reason thereof shall be
deemed likewise to have been cured.

         19. Sections 1008 and 1009 of the Indenture will apply to the 2004
Notes without variation.

         20. There are no additional terms for the 2004 Notes.

III.     7.50% Senior Notes due 2006.

         1. The title of such series of Securities shall be the "7.50% Senior
Notes due 2006" (the "2006 Notes"). The price at which the 2006 Notes shall be
issued is 99.582%.

         2. The aggregate principal amount of the 2006 Notes that may be
authenticated and delivered under the Indenture shall be $500,000,000 (except
for 2006 Notes authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other 2006 Notes pursuant to Sections 304, 305,
306, 906 and 1107 of the Indenture, and except for any 2006 Notes which,
pursuant to Section 303 of the Indenture, shall be deemed never to have been
authenticated and delivered thereunder).

         3. Interest on the 2006 Notes shall be payable to the Persons in whose
names the 2006 Notes (or one or more Predecessor Securities) are registered at
the close of business on the Regular Record Date for such interest.

         4. The Stated Maturity of the 2006 Notes on which the principal thereof
is due and payable is August 15, 2006.

                                       8
<PAGE>   9

         5. The 2006 Notes shall bear interest at 7.50% per annum from August 4,
1999, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable semiannually on February 15 and August 15 of
each year (each, an "Interest Payment Date"), commencing February 15, 2000, to
the Person in whose name the 2006 Note (or one or more Predecessor Securities)
is registered at the close of business on the Regular Record Date for such
interest, which shall initially be February 1 or August 1 (as the case may be),
whether or not a Business Day, immediately preceding such Interest Payment Date.
Interest on the 2006 Notes shall be calculated on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full six-month interest
period, on the actual number of days elapsed in that period.

         6. The 2006 Notes shall be issued in the form of one or more Global
Note or Notes (the "Global 2006 Note" or "Global 2006 Notes"). So long as the
2006 Notes shall be issued in whole in the form of a Global 2006 Note, the
principal of, premium, if any, and interest, if any, on the 2006 Notes shall be
paid in immediately available funds to the Depositary or a nominee of the
Depositary. If at any time the 2006 Notes are no longer represented by a Global
2006 Note and are issued in definitive form ("Certificated 2006 Notes"), then
the principal of, premium, if any, and interest, if any, on each Certificated
2006 Note at Maturity shall be paid to the Holder upon surrender of such
Certificated 2006 Note at the office or agency maintained by the Company in the
Borough of Manhattan, The City of New York (which shall initially be the
principal corporate trust office of The Bank of New York, provided that such
Certificated 2006 Note is surrendered to the Trustee, acting as Paying Agent, in
time for the Paying Agent to make such payments in such funds in accordance with
its normal procedures. Payments of interest with respect to Certificated 2006
Notes other than at Maturity may, at the option of the Company, be made by check
mailed to the address of the Person entitled thereto as it appears on the
Security Register on the relevant Regular Record Date or by wire transfer in
same day funds to such account as may have been appropriately designated to the
Paying Agent by such Person in writing not later than such relevant Regular
Record Date. Each payment of principal, premium, if any, and interest, if any,
shall be made in such coin or currency of the United States of America as at the
time of payment is legal tender for payment of public and private debts.
Transfer of the 2006 Notes shall be registrable on the Securities Register upon
the surrender of the 2006 Notes for registration of transfer at the office or
agency maintained by the Company in the Borough of Manhattan, The City of New
York (which shall initially be the principal corporate trust office of the
Trustee).

         7. The 2006 Notes are subject to redemption upon receipt of notice by
first-class mail at least 30 days and not more than 60 days prior to the
Redemption Date, at the option of the Company at any time, as a whole or in
part, at a Redemption Price equal to the greater of (i) 100% of the principal
amount of the 2006 Note to be redeemed; and (ii) an amount, as determined by the
Quotation Agent, equal to the sum of the present values of the remaining
scheduled payments of principal and interest on the 2006 Notes to be redeemed,
not including any portion of payments of interest accrued as of the Redemption
Date, discounted to the Redemption Date on a semi-annual basis, assuming a
360-day year comprised of twelve 30-day months, at the adjusted treasury rate
plus twenty basis points plus, in each case, accrued and unpaid interest on the
principal amount being redeemed to the Redemption Date; provided, however, that
with respect to interest payments that are


                                       9
<PAGE>   10

due on or prior to the Redemption Date, the Company will make payments of
interest to the Holders of record of the 2006 Notes at the close of business on
the regular Record Date.

         "Adjusted Treasury Rate" means, with respect to any Redemption Date,
the rate per annum equal to the semi-annual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue,
expressed as a percentage of its principal amount, equal to the Comparable
Treasury Price for that Redemption Date.

         "Comparable Treasury Issue" means the United States treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term of the 2006 Notes to be redeemed that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of 2006 Notes.

         "Comparable Treasury Rate" means, with respect to any Redemption Date,
(i) the average of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, on the third
Business Day preceding such Redemption Date, as set forth by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for the U.S.
Government Securities," or (ii) if such release, or any successor release, is
not published or does not contain such prices on such Business Day, (1) the
average of the Reference Treasury Dealer quotations for that Redemption Date,
after excluding the highest and lowest Reference Treasury Dealer Quotations, or
(2) if the Trustee obtains fewer that four Reference Treasury Dealer Quotations
for the Redemption Date, the average of the Reference Treasury Dealer Quotations
obtained, as determined by the Quotation Agent.

         "Quotation Agent" means the Reference Treasury Dealer appointed by the
Company.

         "Reference Treasury Dealer" means (i) Goldman, Sachs & Co. or its
successors; provided, however that if any of them ceases to be a primary U.S.
government securities dealer in New York City (a "Primary Treasury Dealer"), the
Company will substitute for it another Primary Treasury Dealer, and (ii) any
other Primary Treasury Dealer(s) selected by the Company.

         "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue, expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by the Reference Treasury Dealer at 5:00 p.m. on the
third Business Day preceding that Redemption Date.

         Unless the Company defaults in payment of the Redemption Price, no
interest will accrue on the 2006 Notes called for redemption for the period from
and after the Redemption Date.

         8. The 2006 Notes are not subject to any sinking fund or analogous
provisions. The 2006 Notes will not be redeemable at the option of the Holder
thereof prior to Maturity.



                                       10
<PAGE>   11

         9. The 2006 Notes shall be issuable only in denominations of $1,000 and
any integral multiple thereof.

         10. Except as stated in Section 7 above, the amount of payments of
principal of, or any premium or interest on, any 2006 Notes may not be
determined with reference to an index, formula or other method.

         11. The 2006 Notes may be purchased only in currency of the United
States and payment of principal of, premium, if any, and interest on the 2006
Notes will only be made in currency of the United States.

         12. The payment of principal of, premium, if any, or interest on the
2006 Notes will not be payable at the option of the Company or the Holder in any
currency or currency units other than in the currency of the United States.

         13. The entire principal amount of the 2006 Notes will be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502 of
the Indenture.

         14. The principal amount of the 2006 Notes will be determinable as of
any one or more dates prior to Stated Maturity.

         15. The defeasance and covenant defeasance provisions of Article
Thirteen of the Indenture will apply to the 2006 Notes.

         16. The 2006 Notes may not be converted into other securities or
property.

         17. The Depositary for the Global 2006 Note shall be The Depository
Trust Company, a New York corporation ("DTC"). The 2006 Notes will be
represented by one Global 2006 Note registered in the name of DTC or CEDE & Co.,
as a nominee of DTC. Except as set forth in Section 305 of the Indenture, such
Global 2006 Note may be transferred, in whole and not in part, only to
Depositary or another nominee of Depositary.

         18. In addition to the Events of Default contained in the Indenture,
the following will be an Event of Default with respect to the 2006 Notes: (i)
failure to make any payment at maturity, including any applicable grace period,
in respect of indebtedness, which term means obligations (other than
non-recourse obligations or the 2006 Notes) of the Company for borrowed money or
evidenced by bonds, debentures, notes or similar instruments ("Indebtedness") in
an amount in excess of $50,000,000 and continuance of such failure or (ii) a
default with respect to any Indebtedness, which default results in the
acceleration of Indebtedness in an amount in excess of $50,000,000 without such
Indebtedness having been discharged or such acceleration having been cured,
waived, rescinded or annulled, in the case of (i) or (ii) above, for a period of
30 days after written notice thereof to the Company by the Trustee or to the
Company and the Trustee by the Holders of not less than 25% in principal amount
of 2006 Notes; provided, however, that if any such failure, default or
acceleration referred to in (i) or (ii) above shall cease or be cured, waived,



                                       11
<PAGE>   12

rescinded or annulled, then the Event of Default by reason thereof shall be
deemed likewise to have been cured.

         19. Sections 1008 and 1009 of the Indenture will apply to the 2006
Notes without variation.

         20. There are no additional terms for the 2006 Notes.

IV.      7.65% Senior Notes due 2009.

         1. The title of such series of Securities shall be the "7.65% Senior
Notes due 2009" (the "2009 Notes"). The price at which the 2009 Notes shall be
issued is 99.547%.

         2. The aggregate principal amount of the 2009 Notes that may be
authenticated and delivered under the Indenture shall be $550,000,000 (except
for 2009 Notes authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other 2009 Notes pursuant to Sections 304, 305,
306, 906 and 1107 of the Indenture, and except for any 2009 Notes which,
pursuant to Section 303 of the Indenture, shall be deemed never to have been
authenticated and delivered thereunder).

         3. Interest on the 2009 Notes shall be payable to the Persons in whose
names the 2009 Notes (or one or more Predecessor Securities) are registered at
the close of business on the Regular Record Date for such interest.

         4. The Stated Maturity of the 2009 Notes on which the principal thereof
is due and payable is August 15, 2009.

         5. The 2009 Notes shall bear interest at 7.65% per annum from August 4,
1999, or from the most recent Interest Payment Date to which interest has been
paid or duly provided for, payable semiannually on February 15 and August 15 of
each year (each, an "Interest Payment Date"), commencing February 15, 2000, to
the Person in whose name the 2009 Note (or one or more Predecessor Securities)
is registered at the close of business on the Regular Record Date for such
interest, which shall initially be February 1 or August 1 (as the case may be),
whether or not a Business Day, immediately preceding such Interest Payment Date.
Interest on the 2009 Notes shall be calculated on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full six-month interest
period, on the actual number of days elapsed in that period.

         6. The 2009 Notes shall be issued in the form of one or more Global
Note or Notes (the "Global 2009 Note" or "Global 2009 Notes"). So long as the
2009 Notes shall be issued in whole in the form of a Global 2009 Note, the
principal of, premium, if any, and interest, if any, on the 2009 Notes shall be
paid in immediately available funds to the Depositary or a nominee of the
Depositary. If at any time the 2009 Notes are no longer represented by a Global
2009 Note and are issued in definitive form ("Certificated 2009 Notes"), then
the principal of, premium, if any, and interest, if any, on each Certificated
2009 Note at Maturity shall be paid to the Holder upon surrender of such


                                       12
<PAGE>   13

Certificated 2009 Note at the office or agency maintained by the Company in the
Borough of Manhattan, The City of New York (which shall initially be the
principal corporate trust office of The Bank of New York, provided that such
Certificated 2009 Note is surrendered to the Trustee, acting as Paying Agent, in
time for the Paying Agent to make such payments in such funds in accordance with
its normal procedures. Payments of interest with respect to Certificated 2009
Notes other than at Maturity may, at the option of the Company, be made by check
mailed to the address of the Person entitled thereto as it appears on the
Security Register on the relevant Regular Record Date or by wire transfer in
same day funds to such account as may have been appropriately designated to the
Paying Agent by such Person in writing not later than such relevant Regular
Record Date. Each payment of principal, premium, if any, and interest, if any,
shall be made in such coin or currency of the United States of America as at the
time of payment is legal tender for payment of public and private debts.
Transfer of the 2009 Notes shall be registrable on the Securities Register upon
the surrender of the 2009 Notes for registration of transfer at the office or
agency maintained by the Company in the Borough of Manhattan, The City of New
York (which shall initially be the principal corporate trust office of the
Trustee).

         7. The 2009 Notes are subject to redemption upon receipt of notice by
first-class mail at least 30 days and not more than 60 days prior to the
Redemption Date, at the option of the Company at any time, as a whole or in
part, at a Redemption Price equal to the greater of (i) 100% of the principal
amount of the 2009 Note to be redeemed; and (ii) an amount, as determined by the
Quotation Agent, equal to the sum of the present values of the remaining
scheduled payments of principal and interest on the 2009 Notes to be redeemed,
not including any portion of payments of interest accrued as of the Redemption
Date, discounted to the Redemption Date on a semi-annual basis, assuming a
360-day year comprised of twelve 30-day months, at the adjusted treasury rate
plus twenty-five basis points plus, in each case, accrued and unpaid interest on
the principal amount being redeemed to the Redemption Date; provided, however,
that with respect to interest payments that are due on or prior to the
Redemption Date, the Company will make payments of interest to the Holders of
record of the 2009 Notes at the close of business on the regular Record Date.

         "Adjusted Treasury Rate" means, with respect to any Redemption Date,
the rate per annum equal to the semi-annual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue,
expressed as a percentage of its principal amount, equal to the Comparable
Treasury Price for that Redemption Date.

         "Comparable Treasury Issue" means the United States treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term of the 2009 Notes to be redeemed that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of 2009 Notes.

         "Comparable Treasury Rate" means, with respect to any Redemption Date,
(i) the average of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, on the third
Business Day preceding such Redemption Date, as set forth by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for the


                                       13
<PAGE>   14

U.S. Government Securities," or (ii) if such release, or any successor release,
is not published or does not contain such prices on such Business Day, (1) the
average of the Reference Treasury Dealer quotations for that Redemption Date,
after excluding the highest and lowest Reference Treasury Dealer Quotations, or
(2) if the Trustee obtains fewer that four Reference Treasury Dealer Quotations
for the Redemption Date, the average of the Reference Treasury Dealer Quotations
obtained, as determined by the Quotation Agent.

         "Quotation Agent" means the Reference Treasury Dealer appointed by the
Company.

         "Reference Treasury Dealer" means (i) Goldman, Sachs & Co. or its
successors; provided, however that if any of them ceases to be a primary U.S.
government securities dealer in New York City (a "Primary Treasury Dealer"), the
Company will substitute for it another Primary Treasury Dealer, and (ii) any
other Primary Treasury Dealer(s) selected by the Company.

         "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue, expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by the Reference Treasury Dealer at 5:00 p.m. on the
third Business Day preceding that Redemption Date.

         Unless the Company defaults in payment of the Redemption Price, no
interest will accrue on the 2009 Notes called for redemption for the period from
and after the Redemption Date.

         8. The 2009 Notes are not subject to any sinking fund or analogous
provisions. The 2009 Notes will not be redeemable at the option of the Holder
thereof prior to Maturity.

         9. The 2009 Notes shall be issuable only in denominations of $1,000 and
any integral multiple thereof.

         10. Except as stated in Section 7 above, the amount of payments of
principal of, or any premium or interest on, any 2009 Notes may not be
determined with reference to an index, formula or other method.

         11. The 2009 Notes may be purchased only in currency of the United
States and payment of principal of, premium, if any, and interest on the 2009
Notes will only be made in currency of the United States.

         12. The payment of principal of, premium, if any, or interest on the
2009 Notes will not be payable at the option of the Company or the Holder in any
currency or currency units other than in the currency of the United States.

         13. The entire principal amount of the 2009 Notes will be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502 of
the Indenture.



                                       14
<PAGE>   15

         14. The principal amount of the 2009 Notes will be determinable as of
any one or more dates prior to Stated Maturity.

         15. The defeasance and covenant defeasance provisions of Article
Thirteen of the Indenture will apply to the 2009 Notes.

         16. The 2009 Notes may not be converted into other securities or
property.

         17. The Depositary for the Global 2009 Note shall be The Depository
Trust Company, a New York corporation ("DTC"). The 2009 Notes will be
represented by one Global 2009 Note registered in the name of DTC or CEDE & Co.,
as a nominee of DTC. Except as set forth in Section 305 of the Indenture, such
Global 2009 Note may be transferred, in whole and not in part, only to
Depositary or another nominee of Depositary.

         18. In addition to the Events of Default contained in the Indenture,
the following will be an Event of Default with respect to the 2009 Notes: (i)
failure to make any payment at maturity, including any applicable grace period,
in respect of indebtedness, which term means obligations (other than
non-recourse obligations or the 2009 Notes) of the Company for borrowed money or
evidenced by bonds, debentures, notes or similar instruments ("Indebtedness") in
an amount in excess of $50,000,000 and continuance of such failure or (ii) a
default with respect to any Indebtedness, which default results in the
acceleration of Indebtedness in an amount in excess of $50,000,000 without such
Indebtedness having been discharged or such acceleration having been cured,
waived, rescinded or annulled, in the case of (i) or (ii) above, for a period of
30 days after written notice thereof to the Company by the Trustee or to the
Company and the Trustee by the Holders of not less than 25% in principal amount
of 2009 Notes; provided, however, that if any such failure, default or
acceleration referred to in (i) or (ii) above shall cease or be cured, waived,
rescinded or annulled, then the Event of Default by reason thereof shall be
deemed likewise to have been cured.

         19. Sections 1008 and 1009 of the Indenture will apply to the 2009
Notes without variation.

         20. There are no additional terms for the 2009 Notes.

V. In rendering this Officers' Certificate, each of undersigned has read the
Indenture, including Sections 102, 201, 301 and 303 thereof, and has made such
examinations and investigations which, in his or her opinion, are necessary to
enable such person to express an informed opinion as to whether all covenants
and conditions required under the Indenture to be complied with or satisfied in
connection with the Trustee's authentication and delivery of the 2002 Notes,
2004 Notes, the 2006 Notes and the 2009 Notes have been complied with or
satisfied, and, in such person's opinion, all such covenants and conditions have
been complied with and satisfied.

         Attached hereto as Exhibits B-1, B-2, B-3, and B-4 are the forms of
Global 2002 Note, Global 2004 Note, Global 2006 Note and Global 2009 Note
(together, the "Global Securities"). We


                                       15
<PAGE>   16

further approve all of the terms and conditions set forth on or referred to in
the attached forms of Global Securities. In the event that Certificated 2002
Notes, Certificated 2004 Notes, Certificated 2006 Notes or Certificated 2009
Notes (together, the "Certificated Securities") are issued in exchange for a
Global Security, the respective form of certificate evidencing the Certificated
Security shall be in substantially the form of the attached Global Security,
with such grammatical and other changes as are necessary to evidence the
Securities in definitive form rather than as Global Securities.

         Capitalized terms used herein that are not otherwise defined herein
shall have the meanings assigned to them in the Indenture.


                                       16
<PAGE>   17

         IN WITNESS WHEREOF, the undersigned have executed this certificate as
of the date set forth above.


                            SUN MICROSYSTEMS, INC.




                            By:
                                 -----------------------------------------------
                                  Michael H. Morris
                                  Vice President, General Counsel and Secretary




                            By:
                                 -----------------------------------------------
                                  George Reyes
                                  Vice President and Corporate Treasurer


                                       17


<PAGE>   1
                                                                     Exhibit 4.4

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


                             SUN MICROSYSTEMS, INC.
                             % Senior Note due 200_


No.                                                               $____________
CUSIP No.

        Sun Microsystems, Inc., a corporation duly organized and existing under
the laws of Delaware (herein called the "Company," which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to Cede & Co., or registered assigns, the
principal sum of ___________________ ($____________) on _____________, and to
pay interest thereon from _____________, or from the most recent Interest
Payment Date to which interest has been paid or duly provided for, semi-annually
on _____________ and _____________ in each year, commencing _____________, at
the rate of __% per annum, until the principal hereof is paid or made available
for payment. The interest so payable, and punctually paid or duly provided for,
on any Interest Payment Date will, as provided in such Indenture, be paid to the
Person in whose name this Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest, which shall be the _____________ or _____________(whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Any such interest not so punctually paid or duly provided for will forthwith
cease to be payable to the Holder on such Regular Record Date and may either be
paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest to be fixed by the Trustee, notice
whereof shall be given to Holders of Securities of this series 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 of this series may be listed, and upon such notice as
may be required by such exchange, all as more fully provided in said Indenture.
Interest on the Security shall be computed on the basis of a 360-day year of
twelve 30-day months, and for any period shorter than a full six-month interest
period, on the basis of the actual days elapsed in such period.

<PAGE>   2


        So long as all of the Securities of this series are represented by
Global Securities, the principal of, premium, if any, and interest, if any on
this Global Security shall be paid in same day funds to the Depositary, or to
such name or entity as is requested by an authorized representative of the
Depositary. If at any time the Securities of this series are no longer
represented by the Global Securities and are issued in definitive form
("Certificated Securities"), then the principal of, premium, if any, and
interest, if any, on each Certificated Security at Maturity shall be paid to the
Holder upon surrender of such Certificated Security at the office of agency
maintained by the Company in the Borough of Manhattan, The City of New York
(which shall initially be the principal corporate trust office of the Bank of
New York) or at such other place or places as may be designated in or pursuant
to the Indenture, provided that such Certificated Security is surrendered to the
Trustee, acting as Paying Agent, in time for the Paying Agent to make such
payments in such funds in accordance with its normal procedures. Payments of
interest with respect to Certificated Securities other than at Maturity may, at
the option of the Company, be made by check mailed to the address of the Person
entitled thereto as it appears on the Security Register on the relevant Regular
or Special Record Date or by wire transfer in same day funds to such account as
may have been appropriately designated to the Paying Agent by such Person in
writing not later than such relevant Regular or Special Record Date.

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

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


<PAGE>   3



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

                                                     SUN MICROSYSTEMS, INC.

                                                     By:
                                                         -----------------------
Attest:

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


Trustee's Certificate of Authentication.

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

Dated:

                                                     THE BANK OF NEW YORK
                                                     As Trustee


                                                     By:
                                                         -----------------------
                                                          Authorized Signatory


<PAGE>   4

                              REVERSE OF SECURITY.

        This Security is one of a duly authorized issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series under an Indenture, dated as of August 1, 1999 (herein called the
"Indenture," which term shall have the meaning assigned to it in such
instrument), between the Company and The Bank of New York, as Trustee (herein
called the "Trustee," which term includes any successor trustee under the
Indenture), and reference is hereby made to the Indenture and all indentures
supplemental thereto for a statement of the respective rights, limitations of
rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Securities and of the terms upon which the Securities are, and
are to be, authenticated and delivered. This Security is one of the series
designated on the face hereof limited in aggregate principal amount to
$_________________.

        The Security is subject to redemption upon receipt of notice by
first-class mail at least 30 days and not more than 60 days prior to the
Redemption Date, at the option of the Company at any time, as a whole or in
part, at a Redemption Price equal to the greater of (i) 100% of the principal
amount of the Security to be redeemed or (ii) an amount, as determined by the
Quotation Agent, equal to the sum of the present values of the remaining
scheduled payments of principal and interest on the Securities to be redeemed,
not including any portion of payments of interest accrued as of the Redemption
Date, discounted to the Redemption Date on a semi-annual basis, assuming a
360-day year comprised of twelve 30-day months, at the adjusted treasury rate
plus ten basis points plus, in each case, accrued and unpaid interest on the
principal amount being redeemed to the Redemption Date; provided, however, that
with respect to interest payments that are due on or prior to the Redemption
Date, the Company will make payments of interest to the Holders of record of the
Securities at the close of business on the regular Record Date.

        "Adjusted Treasury Rate" means, with respect to any Redemption Date, the
rate per annum equal to the semi-annual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue,
expressed as a percentage of its principal amount, equal to the Comparable
Treasury Price for that Redemption Date.

        "Comparable Treasury Issue" means the United States treasury security
selected by the Quotation Agent as having a maturity comparable to the remaining
term of the Securities to be redeemed that would be utilized, at the time of
selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of the Securities.

        "Comparable Treasury Rate" means, with respect to any Redemption Date,
(i) the average of the bid and asked prices for the Comparable Treasury Issue,
expressed in each case as a percentage of its principal amount, on the third
Business Day preceding such Redemption Date, as set forth by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for the U.S.
Government Securities," or (ii) if such release, or any successor release, is
not published or does not contain such prices on such Business Day, (1) the
average of the Reference Treasury Dealer Quotations for that Redemption Date,
after excluding the highest and lowest Reference Treasury

<PAGE>   5
Dealer Quotations, or (2) if the Trustee obtains fewer that four Reference
Treasury Dealer Quotations for the Redemption Date, the average of the Reference
Treasury Dealer Quotations obtained, as determined by the Quotation Agent.

        "Quotation Agent" means the Reference Treasury Dealer appointed by the
Company.

        "Reference Treasury Dealer" means (i) Goldman, Sachs & Co. or its
successors; provided, however that if any of them ceases to be a primary U.S.
government securities dealer in New York City (a "Primary Treasury Dealer"), the
Company will substitute for it another Primary Treasury Dealer, and (ii) any
other Primary Treasury Dealer(s) selected by the Company.

        "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue, expressed in each case as a percentage of its principal amount, quoted in
writing to the Trustee by the Reference Treasury Dealer at 5:00 p.m. on the
third Business Day preceding that Redemption Date.

        Unless the Company defaults in payment of the Redemption Price, no
interest will accrue on the Securities called for redemption for the period from
and after the Redemption Date.

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

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

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

        In addition to the Events of Default set forth in Section 501 of the
Indenture, the following will be an Event of Default with respect to the
Securities: (i) failure to make any payment at maturity, including any
applicable grace period, in respect of indebtedness, which term means
obligations (other than non-recourse obligations or the Securities) of the
Company for borrowed money or evidenced by bonds, debentures, notes or similar
instruments ("Indebtedness") in an amount in excess of $50,000,000 and
continuance of such failure or (ii) a default with respect to any Indebtedness,
which default results in the acceleration of Indebtedness in an amount in excess
of $50,000,000 without such Indebtedness having been discharged or such
acceleration having been cured, waived, rescinded or annulled, in the case of
(i) or (ii) above, for a period of 30 days after written notice thereof to the
Company by the Trustee or to the Company and the Trustee by the Holders of not
less than 25% in principal amount of Securities; provided, however, that if any
such failure, default or acceleration referred to in (i) or (ii) above shall
cease or be cured, waived,


<PAGE>   6
rescinded or annulled, then the Event of Default by reason thereof shall be
deemed likewise to have been cured.

        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 of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of more than 50% in principal amount of the Securities at
the time Outstanding of each series to be affected. The Indenture also contains
provisions permitting the Holders of specified percentages in principal amount
of the Securities of each series at the time Outstanding, on behalf of the
Holders of all Securities of such series, to waive compliance by the Company
with certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the Holder of
this Security shall be conclusive and binding upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer hereof or in exchange herefor or in lieu hereof, whether or not
notation of such consent or waiver is made upon this Security.

        As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default with respect to the
Securities of this series, the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding 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
Securities of this series at the time 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 or any premium or interest hereon
on or after the respective due dates expressed herein.

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

        As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company in any place where the principal of and any
premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or its
attorney duly authorized in writing, and thereupon one or more new Securities of
this series and of like tenor, of authorized denominations and for the same
aggregate principal amount, will be issued to the designated transferee or
transferees.
<PAGE>   7
        The Securities of this series are issuable only in registered form
without coupons in denominations of $1,000 and any integral multiple thereof. As
provided in the Indenture and subject to certain limitations therein set forth,
Securities of this series are exchangeable for a like aggregate principal amount
of Securities of this series and of like tenor of a different authorized
denomination, as requested by the Holder surrendering the same.

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

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

        This Security shall be deemed to be a contract made under the laws of
the State of New York, and for all purposes shall be construed in accordance
with and governed by the laws of said State, without regard to conflict of laws
principles thereof.

        All terms used in this Security which are defined in the Indenture shall
have the meanings assigned to them in the Indenture.
<PAGE>   8

                                   ASSIGNMENT

                FOR VALUE RECEIVED the undersigned hereby sells,
                           assigns and transfers unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

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

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

- --------------------------------------------------------------------------------
(Please print or typewrite name and address including postal zip code of
assignee)

- --------------------------------------------------------------------------------
the within Global Note of SUN MICROSYSTEMS, INC. and all rights hereunder,
hereby irrevocably constituting and appointing

                                                                        attorney
- ------------------------------------------------------------------------
to transfer said Global Note on the books of the within-named Company, with full
power of substitution in the premises.

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

                             SIGN HERE
                                        ----------------------------------------
                                            NOTICE:  THE SIGNATURE TO THIS
                                            ASSIGNMENT MUST CORRESPOND
                                            WITH THE NAME AS WRITTEN
                                            UPON THE FACE OF THE WITHIN
                                            INSTRUMENT IN EVERY
                                            PARTICULAR, WITHOUT
                                            ALTERATION OR ENLARGEMENT
                                            OR ANY CHANGE WHATEVER.

                                            SIGNATURE GUARANTEED




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