Document:

<PAGE>   1

EXHIBIT 4.1

                                    INDENTURE

                                     between

                          ONLINE RESOURCES CORPORATION,

                                   the Company

                                       and

                             BANKERS TRUST COMPANY,

                                   as Trustee

                  8.0% CONVERTIBLE SUBORDINATED NOTES DUE 2005

                         Dated as of September 28, 2000

<PAGE>   2

                             CROSS-REFERENCE TABLE*

<TABLE>
<CAPTION>
Trust Indenture                                                                Indenture
Act Section                                                                     Section
                                                                                -------
<S>                                                                      <C>
 310(a)(1)..........................................................               5.11

    (a)(2)..........................................................               5.11

    (a)(3)..........................................................                n/a

    (a)(4) .........................................................                n/a

    (a)(5) .........................................................               5.11

    (b) ............................................................          5.3; 5.11

    (c) ............................................................                n/a

 311(a).............................................................               5.12

    (b) ............................................................               5.12

    (c) ............................................................                n/a

 312(a).............................................................               2.10

    (b) ............................................................               14.3

    (c) ............................................................               14.3

 313(a).............................................................                5.7

    (b)(1) .........................................................                n/a

    (b)(2) .........................................................                5.7

    (c). ...........................................................          5.7; 14.2

    (d) ............................................................                5.7

 314(a)(1), (2), (3)................................................          9.6; 14.6

    (a)(4) .........................................................     9.6; 9.7; 14.6

    (b). ...........................................................                n/a
</TABLE>

                                       ii

<PAGE>   3

<TABLE>
<S>                                                                      <C>
    (c)(1) .........................................................               14.5

    (c)(2) .........................................................               14.5

    (c)(3) .........................................................                n/a

    (d) ............................................................                n/a

    (e) ............................................................               14.6

    (f) ............................................................                n/a

 315(a)............................................................                 5.1(a)

    (b). ...........................................................          5.6; 14.2

    (c) ............................................................             5.1(b)

    (d) ............................................................             5.1(c)

    (e) ............................................................               4.14

 316(a)(last sentence)..............................................               2.13

    (a)(1)(A) ......................................................                4.5

    (a)(1)(B) ......................................................                4.4

    (a)(2) .........................................................                n/a

    (b) ............................................................                4.7

    (c). ...........................................................                7.4

 317(a)(1)..........................................................                4.8

    (a)(2) .........................................................                4.9

    (b) ............................................................                2.5

 318(a).............................................................               14.1

    (b) ............................................................                n/a

(c). ...............................................................               14.1
</TABLE>

                                      iii
<PAGE>   4

"n/a" means not applicable.

*This Cross-Reference Table shall not, for any purpose, be deemed to be a part
of the Indenture.

                                       iv

<PAGE>   5

<TABLE>
<S>                <C>                                                                                         <C>
                                              ARTICLE 1

                            DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.1        Definitions................................................................................    1
Section 1.2        Incorporation by Reference of Trust Indenture Act..........................................   11
Section 1.3        Rules of Construction......................................................................   12

                                              ARTICLE 2

                                           THE SECURITIES

Section 2.1        Title and Terms............................................................................   12
Section 2.2        Form of Securities.........................................................................   13
Section 2.3        Legends....................................................................................   14
Section 2.4        Execution, Authentication, Delivery and Dating.............................................   19
Section 2.5        Registrar and Paying Agent.................................................................   19
Section 2.6        Paying Agent to Hold Assets in Trust.......................................................   20
Section 2.7        General Provisions Relating to Transfer and Exchange.......................................   21
Section 2.8        Book-Entry Provisions for the Global Securities............................................   21
Section 2.9        Special Transfer Provisions................................................................   23
Section 2.10       Holder Lists...............................................................................   25
Section 2.11       Persons Deemed Owners......................................................................   25
Section 2.12       Mutilated, Destroyed, Lost or Stolen Securities............................................   26
Section 2.13       Treasury Securities........................................................................   26
Section 2.14       Temporary Securities.......................................................................   27
Section 2.15       Cancellation...............................................................................   27
Section 2.16       CUSIP Numbers..............................................................................   27
Section 2.17       Defaulted Interest.........................................................................   28

                                              ARTICLE 3

                                    SATISFACTION AND DISCHARGE

Section 3.1        Satisfaction and Discharge of Indenture....................................................   28
Section 3.2        Deposited Monies to be Held in Trust.......................................................   29
Section 3.3        Return of Unclaimed Monies.................................................................   30

                                              ARTICLE 4

                                       DEFAULTS AND REMEDIES

Section 4.1        Events of Default..........................................................................   30
Section 4.2        Acceleration of Maturity; Rescission and Annulment.........................................   31
Section 4.3        Other Remedies.............................................................................   32
Section 4.4        Waiver of Past Defaults....................................................................   32
</TABLE>

                                       v

<PAGE>   6

<TABLE>
<S>                <C>                                                                                         <C>
Section 4.5        Control by Majority........................................................................   33
Section 4.6        Limitation on Suit.........................................................................   33
Section 4.7        Unconditional Rights of Holders to Receive Payment and to Convert..........................   34
Section 4.8        Collection of Indebtedness and Suits for Enforcement by the Trustee........................   34
Section 4.9        Trustee May File Proofs of Claim...........................................................   35
Section 4.10       Restoration of Rights and Remedies.........................................................   35
Section 4.11       Rights and Remedies Cumulative.............................................................   36
Section 4.12       Delay or Omission Not Waiver...............................................................   36
Section 4.13       Application of Money Collected.............................................................   36
Section 4.14       Undertaking for Costs......................................................................   36
Section 4.15       Waiver of Stay or Extension Laws...........................................................   37
Section 4.16       Enforceability of Claims by Trustee........................................................   37

                                              ARTICLE 5

                                             THE TRUSTEE

Section 5.1        Certain Duties and Responsibilities........................................................   37
Section 5.2        Certain Rights of Trustee..................................................................   39
Section 5.3        Individual Rights of Trustee...............................................................   40
Section 5.4        Money Held in Trust........................................................................   40
Section 5.5        Trustee's Disclaimer.......................................................................   40
Section 5.6        Notice of Defaults.........................................................................   40
Section 5.7        Reports by Trustee to Holders..............................................................   40
Section 5.8        Compensation and Indemnification...........................................................   41
Section 5.9        Replacement of Trustee.....................................................................   41
Section 5.10       Successor Trustee by Merger, Etc...........................................................   42
Section 5.11       Corporate Trustee Required; Eligibility....................................................   43
Section 5.12       Collection of Claims Against the Company...................................................   43

                                              ARTICLE 6

                      CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

Section 6.1        Company May Consolidate, Etc., Only on Certain Terms.......................................   43
Section 6.2        Successor Corporation Substituted..........................................................   44

                                              ARTICLE 7

                               AMENDMENTS, SUPPLEMENTS AND WAIVERS

Section 7.1        Without Consent of Holders of Securities...................................................   44
Section 7.2        With Consent of Holders of Securities......................................................   45
Section 7.3        Compliance with Trust Indenture Act........................................................   46
Section 7.4        Revocation of Consents and Effect of Consents or Votes.....................................   46
Section 7.5        Notation on or Exchange of Securities......................................................   47
</TABLE>

                                       vi

<PAGE>   7

<TABLE>
<S>                <C>                                                                                         <C>
Section 7.6        Trustee to Sign Amendment, Etc.............................................................   47

                                              ARTICLE 8

                                MEETING OF HOLDERS OF SECURITIES

Section 8.1        Purposes for Which Meetings May Be Called..................................................   47
Section 8.2        Call Notice and Place of Meetings..........................................................   48
Section 8.3        Persons Entitled to Vote at Meetings.......................................................   48
Section 8.4        Quorum; Action.............................................................................   48
Section 8.5        Determination of Voting Rights; Conduct and Adjournment of Meetings........................   49
Section 8.6        Counting Votes and Recording Action of Meetings............................................   50

                                              ARTICLE 9

                                              COVENANTS

Section 9.1        Payment of Principal, Premium and Interest.................................................   50
Section 9.2        Maintenance of Offices or Agencies.........................................................   50
Section 9.3        Corporate Existence........................................................................   51
Section 9.4        Maintenance of Properties..................................................................   51
Section 9.5        Payment of Taxes and Other Claims..........................................................   51
Section 9.6        Reports....................................................................................   52
Section 9.7        Compliance Certificate.....................................................................   52
Section 9.8        Resale of Certain Securities...............................................................   52

                                              ARTICLE 10

                                     REDEMPTION OF SECURITIES

Section 10.1       Provisional Redemption.....................................................................   53
Section 10.2       Non-provisional Redemption.................................................................   54
Section 10.3       Notice to Trustee..........................................................................   55
Section 10.4       Selection of Securities to Be Redeemed.....................................................   55
Section 10.5       Notice of Redemption.......................................................................   55
Section 10.6       Effect of Notice of Redemption.............................................................   56
Section 10.7       Deposit of Redemption Price................................................................   57
Section 10.8       Securities Redeemed in Part................................................................   57

                                              ARTICLE 11

                                          REPURCHASE RIGHT

Section 11.1       Repurchase Right...........................................................................   57
Section 11.2       Conditions to the Company's Election to Pay the Repurchase Price or an Interest Make-
                   Whole Payment in Common Stock ..............................................................  58
</TABLE>

                                   vii

<PAGE>   8

<TABLE>
<S>                <C>                                                                                         <C>
Section 11.3       Notices; Method of Exercising Repurchase Right, Etc........................................   59

                                              ARTICLE 12

                                     CONVERSION OF SECURITIES

Section 12.1       Conversion Right and Conversion Price......................................................   62
Section 12.2       Exercise of Conversion Right...............................................................   62
Section 12.3       Fractions of Shares........................................................................   63
Section 12.4       Adjustment of Conversion Price.............................................................   63
Section 12.5       Annual Adjustment of Conversion Price......................................................   72
Section 12.6       Notice of Adjustments of Conversion Price..................................................   73
Section 12.7       Notice Prior to Certain Action.............................................................   73
Section 12.8       Company to Reserve Common Stock............................................................   74
Section 12.9       Section Taxes on Conversions...............................................................   74
Section 12.10      Covenant as to Common Stock................................................................   75
Section 12.11      Cancellation of Converted Securities.......................................................   75
Section 12.12      Effect of Reclassification, Consolidation, Merger or Sale..................................   75
Section 12.13      Responsibility of Trustee for Conversion Provisions........................................   76

                                              ARTICLE 13

                                            SUBORDINATION

Section 13.1       Securities Subordinated to Senior Debt.....................................................   76
Section 13.2       Subrogation................................................................................   79
Section 13.3       Obligation of the Company is Absolute and Unconditional....................................   79
Section 13.4       Maturity of or Default on Senior Debt......................................................   79
Section 13.5       Payments on Securities Permitted...........................................................   79
Section 13.6       Effectuation of Subordination by Trustee...................................................   80
Section 13.7       Knowledge of Trustee.......................................................................   80
Section 13.8       Trustee's Relation to Senior Debt..........................................................   80
Section 13.9       Rights of Holders of Senior Debt Not Impaired..............................................   81
Section 13.10      Modification of Terms of Senior Debt.......................................................   81
Section 13.11      Certain Conversions Not Deemed Payment.....................................................   81

                                              ARTICLE 14

                              OTHER PROVISIONS OF GENERAL APPLICATION

Section 14.1       Trust Indenture Act Controls...............................................................   82
Section 14.2       Notices....................................................................................   82
Section 14.3       Communication by Holders with Other Holders................................................   83
Section 14.4       Acts of Holders of Securities..............................................................   83
Section 14.5       Certificate and Opinion as to Conditions Precedent.........................................   84
</TABLE>

                                      viii

<PAGE>   9

<TABLE>
<S>                <C>                                                                                        <C>
Section 14.6       Statements Required in Certificate or Opinion..............................................   85
Section 14.7       Effect of Headings and Table of Contents...................................................   85
Section 14.8       Successors and Assigns.....................................................................   85
Section 14.9       Separability Clause........................................................................   85
Section 14.10      Benefits of Indenture......................................................................   86
Section 14.11      Section Governing Law......................................................................   86
Section 14.12      Counterparts...............................................................................   86
Section 14.13      Legal Holidays.............................................................................   86
Section 14.14      Recourse Against Others....................................................................   86

EXHIBITS

EXHIBIT A:           Form of Security.......................................................................... A-1

EXHIBIT B:           Form of Investment Representation Letter.................................................. B-1
</TABLE>

                                       ix

<PAGE>   10

INDENTURE, dated as of September 28, 2000, between ONLINE RESOURCES CORPORATION,
a corporation duly organized and existing under the laws of the State of
Delaware, having its principal office at 7600 Colshire Drive, McLean, Virginia
22102 (the "Company"), and Bankers Trust Company, a New York banking
corporation, as Trustee (the "Trustee"), having its principal corporate trust
office at 4 Albany Street, New York, New York 10006.

RECITALS OF THE COMPANY:

The Company has duly authorized the creation of an issue of its 8.0% Convertible
Subordinated Notes due 2005 (herein called the "Securities") of substantially
the tenor and amount hereinafter set forth, and to provide therefor the Company
has duly authorized the execution and delivery of this Indenture.

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

NOW, THEREFORE, THIS INDENTURE WITNESSETH:

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

                                    ARTICLE 1

                   DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.1 Definitions.

For all purposes of this Indenture and the Securities, the following terms are
defined as follows:

       "Act", when used with respect to any Holder of a Security, has the
       meaning specified in Section 14.4(a).

       "Additional Amounts" means all amounts, if any, payable pursuant to
       Section 2 of the Registration Rights Agreement.

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

       "Agent Member" has the meaning stated in Section 2.8.

<PAGE>   11

       "Bankruptcy Law" means Title 11 of the U.S. Code or any similar federal
       or state law for the relief of debtors.

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

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

       "Business Day", when used with respect to any Place of Payment or Place
       of Conversion, means each Monday, Tuesday, Wednesday, Thursday and Friday
       which is not a day on which banking institutions in the same jurisdiction
       as the Corporate Trust Office of the Trustee or in that Place of Payment
       or Place of Conversion, as the case may be, are authorized or obligated
       by law to close.

       "Capital Lease" means all obligations and liabilities (contingent or
       otherwise) in respect of leases of such Person required, in conformity
       with generally accepted accounting principles, to be accounted for as
       capitalized lease obligations on the balance sheet of such Person.

       "Change of Control" means the occurrence of any of the following after
       the original issuance of the Securities:

       (1) the acquisition by any Person of beneficial ownership, directly or
           indirectly, through a purchase, merger or other acquisition
           transaction or series of transactions, of shares of capital stock of
           the Company entitling such person to exercise 50% or more of the
           total voting power of all shares of capital stock of the Company
           entitled to vote generally in elections of directors, other than any
           such acquisition by the Company, any subsidiary of the Company or any
           employee benefit plan of the Company; or

       (2) any consolidation or merger of the Company with or into any other
           Person, any merger of another Person into the Company, or any
           conveyance, transfer, sale, lease or other disposition of all or
           substantially all of the properties and assets of the Company to
           another Person, other than (a) any such transaction (x) that does not
           result in any reclassification, conversion, exchange or cancellation
           of outstanding shares of capital stock of the Company and (y)
           pursuant to which holders of capital stock of the Company immediately
           prior to such transaction have the entitlement to exercise, directly
           or indirectly, 50% or more of the total voting power of all shares of
           capital stock of the Company entitled to vote generally in the
           election of directors of the continuing or surviving person
           immediately after such transaction and (b) any merger which is
           effected solely to change the jurisdiction of incorporation of the
           Company and results in a reclassification, conversion or exchange of
           outstanding shares of Common Stock solely into shares of common stock
           of the surviving entity;

           provided, however, that a Change of Control shall not be deemed to
           have occurred if the Trading Price per share of the Common Stock for
           any five Trading Days within the period of 10 consecutive Trading
           Days ending immediately after the later of the Change of Control or
           the public announcement of the Change of Control, in the case of a
           Change of Control under clause

                                       2
<PAGE>   12

           (1) above, or the period of 10 consecutive Trading Days ending
           immediately before the Change of Control, in the case of a Change of
           Control under clause (2) above, shall equal or exceed 110% of the
           Conversion Price of the Securities in effect on each such Trading
           Day. Beneficial ownership shall be determined in accordance with Rule
           13d-3 promulgated by the SEC under the Exchange Act. As used in this
           definition, the term "Person" shall include any syndicate or group
           which would be deemed to be a "person" under Section 13(d)(3) of the
           Exchange Act.

       "Closing Date" means September 28, 2000 or such later date on which the
       Securities may be delivered pursuant to the Placement Agreement.

       "Common Stock" means 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.
       However, subject to the provisions of Section 12.12, shares issuable on
       conversion of Securities shall include only shares of the class
       designated as Common Stock, par value $0.0001 per share, 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, however, 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 Notice" has the meaning specified in Section 11.3.

       "Company Order" means a written order signed in the name of the Company
       by both (1) the Chairman of the Board, the Chief Executive Officer, the
       President or a Vice President and (2) so long as not the same as the
       officer signing pursuant to clause (1), the Chief Financial Officer, the
       Treasurer or the Secretary of the Company, and delivered to the Trustee.

       "Conversion Agent" means any Person authorized by the Company to convert
       Securities in accordance with Article 12.

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

       "Corporate Trust Office" means for purposes of presentation or surrender
       of Securities for payment, registration, transfer, exchange or conversion
       or for service of notices or demands upon the Company or for any other
       purpose of this Indenture, the office of the Trustee located in The City
       of New York at which at any particular time its corporate trust business
       shall be administered (which at the date of this Indenture is located at
       Bankers Trust Company, 4 Albany Street, New York, New York 10006.

                                       3
<PAGE>   13

       "Corporation" means corporations, associations, limited liability
       companies, companies and business trusts.

       "Current Market Price" has the meaning set forth in Section 12.4(g).

       "Current Market Value" has the meaning set forth in Section 10.1(a).

       "Custodian" means any receiver, trustee, assignee, liquidator,
       sequestrator or similar official under any Bankruptcy Law.

       "Default" means an event which is, or after notice or lapse of time or
       both would be, an Event of Default.

       "Defaulted Interest" has the meaning specified in Section 2.17.

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

       "Designated Senior Debt" means Senior Debt of the Company which, at the
       date of determination, (i) has an aggregate amount outstanding of, or
       under which, at the date of determination, the holders thereof are
       committed to lend up to, at least $5 million; and (ii) is specifically
       designated in the instrument, agreement or other document evidencing or
       governing that Senior Debt as "Designated Senior Debt" for purposes of
       this Indenture (provided, however, 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).

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

       "Event of Default" has the meaning specified in Section 4.1.

       "Exchange Act" means the Securities Exchange Act of 1934, as amended.

       "Expiration Time" has the meaning specified in Section 12.4(f).

       "Fair market value" has the meaning set forth in Section 12.4(g).

       "Global Security" has the meaning specified in Section 2.2(b).

       "Guarantee" means any obligation, contingent or otherwise, of any Person,
       directly or indirectly guaranteeing any Indebtedness of any other Person
       and any obligation, direct or indirect, contingent or otherwise, of such
       Person:

       (1) to purchase or pay (or advance or supply funds for the purchase or
           payment of) such Indebtedness of such other Person (whether arising
           by virtue of partnership arrangements, or by

                                       4
<PAGE>   14

           agreement to keep-well, to purchase assets, goods, securities or
           services, to take-or-pay, or maintain financial statement conditions
           or otherwise); or

       (2) entered into for purposes of assuring in any other manner the obligee
           of such Indebtedness of the payment thereof or to protect such
           obligee against loss in respect thereof (in whole or in part);

       provided, however, that the term "guarantee" will not include
       endorsements for collection or deposit in the ordinary course of
       business. The term "guarantee" used as a verb has a corresponding
       meaning.

       "Holder", when used with respect to any Security, including any Global
       Security, means the Person in whose name the Security is registered in
       the Register.

       "Indebtedness", when used with respect to any Person, and without
       duplication means:

       (1) all indebtedness, obligations and other liabilities (contingent or
           otherwise) of such Person for borrowed money (including obligations
           of the Company in respect of overdrafts, foreign exchange contracts,
           currency exchange agreements, Interest Rate Protection Agreements,
           and any loans or advances from banks, whether or not evidenced by
           notes or similar instruments) or evidenced by bonds, debentures,
           notes or other instruments for the payment of money, or Purchase
           Money Debt, or incurred in connection with the acquisition of any
           services (whether or not the recourse of the lender is to the whole
           of the assets of such Person or to only a portion thereof), other
           than any account payable or other accrued current liability or
           obligation to trade creditors incurred in the ordinary course of
           business in connection with the obtaining of such services;

       (2) all reimbursement obligations and other liabilities (contingent or
           otherwise) of such Person with respect to letters of credit, bank
           guarantees, bankers' acceptances, surety bonds, performance bonds or
           other guaranty of contractual performance;

       (3) all obligations and liabilities (contingent or otherwise) in respect
           of (a) Capital Leases; and (b) any lease or related documents
           (including a purchase agreement) in connection with the lease of real
           property which provides that such Person is contractually obligated
           to purchase or cause a third party to purchase the leased property
           and thereby guarantee a minimum residual value of the leased property
           to the landlord and the obligations of such Person under such lease
           or related document to purchase or to cause a third party to purchase
           the leased property;

       (4) all obligations of such Person (contingent or otherwise) with respect
           to an interest rate or other swap, cap or collar agreement or other
           similar instrument or agreement or foreign currency hedge, exchange,
           purchase or similar instrument or agreement;

       (5) all direct or indirect guaranties or similar agreements by such
           Person in respect of, and obligations or liabilities (contingent or
           otherwise) of such Person to purchase or otherwise acquire or
           otherwise assure a creditor against loss in respect of, indebtedness,
           obligations or liabilities of another Person of the kind described in
           clauses (1) through (4);

                                       5
<PAGE>   15

       (6) any indebtedness or other obligations described in clauses (1)
           through (4) secured by any mortgage, pledge, lien or other
           encumbrance existing on property which is owned or held by such
           Person, regardless of whether the indebtedness or other obligation
           secured thereby shall have been assumed by such Person; and

       (7) any and all deferrals, renewals, extensions and refundings of, or
           amendments, modifications or supplements to, any indebtedness,
           obligation or liability of the kind described in clauses (1) through
           (6).

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

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

       "Interest Make-Whole Payment" has the meaning specified in Section
       10.1(b).

       "Interest Make-Whole Period" has the meaning specified in Section
       10.1(b).

       "Interest Payment Date" means each of April 1 and October 1, beginning
       April 1, 2001 and ending at Maturity; provided, however, that if any such
       date is not a Business Day, the Interest Payment Date shall be the next
       succeeding Business Day.

       "Interest Rate" means, 8.0% per annum.

       "Interest Rate Protection Agreement" means, with respect to any Person,
       any interest rate swap agreement, interest rate cap or collar agreement
       or other financial agreement or arrangement designed to protect such
       person against fluctuations in interest rates, as in effect from time to
       time.

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

       "Investment Representation Letter" has the meaning specified in Section
       2.2(c).

       "Maturity" means the date on which the principal of such Security becomes
       due and payable as therein or herein provided, whether at the Stated
       Maturity or by acceleration, conversion, call for redemption, exercise of
       a Repurchase Right or otherwise.

       "Nasdaq National Market" means the National Association of Securities
       Dealers Automated Quotation National Market or any successor national
       securities exchange or automated over-the-counter trading market in the
       United States.

       "Non-Electing Share" has the meaning specified in Section 12.12.

                                       6
<PAGE>   16

       "Officer" of the Company means the Chairman of the Board, the Chief
       Executive Officer, the President, the Chief Financial Officer, the
       Treasurer, any Vice President or the Secretary of the Company.

       "Officers' Certificate" means a certificate signed by both (1) the
       Chairman of the Board, the Chief Executive Officer, the President or a
       Vice President and (2) so long as not the same as the officer signing
       pursuant to clause (1), the Chief Financial Officer, the Treasurer or the
       Secretary of the Company, and delivered to the Trustee.

       "Opinion of Counsel" means a written opinion of counsel, who may be
       counsel to the Company (and may include directors or employees of the
       Company) and who is acceptable to the Trustee, which acceptance shall not
       be unreasonably withheld.

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

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

       (2) for the payment or redemption of which money in the necessary amount
           has been previously 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, however, that if
           such Securities are to be redeemed, notice of such redemption has
           been duly given pursuant to this Indenture; and

       (3) which have been paid in exchange for or in lieu of other Securities
           which 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.

       "Paying Agent" has the meaning specified in Section 2.5.

       "Payment Blockage Notice" has the meaning specified in Section 13.1(d).

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

       "Physical Securities" has the meaning specified in Section 2.2(c).

       "Place of Conversion" means any city in which any Conversion Agent is
       located.

       "Place of Payment" means any city in which any Paying Agent is located.

       "Placement Agent" means Jefferies & Company, Inc.

                                       7
<PAGE>   17

       "Placement Agreement" means the Placement Agreement, dated September 25,
       2000, between the Company and the Placement Agent.

       "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 2.12 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.

       "Present Value" has the meaning specified in Section 10.1(b).

       "Purchase Money Debt" means all indebtedness, obligations and other
       liabilities (contingent or otherwise) incurred in connection with the
       acquisition of any property or assets (whether or not the recourse of the
       lender is to the whole of the assets of the borrower or to only a portion
       thereof), other than any account payable or other accrued current
       liability or obligation to trade creditors incurred in the ordinary
       course of business in connection with the obtaining of materials.

       "QIB" means a "qualified institutional buyer" as defined in Rule 144A.

       "Record Date" means either a Regular Record Date or a Special Record
       Date, as the case may be; provided that, for purposes of Section 12.4,
       Record Date has the meaning specified in 12.4(g).

       "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 such Security is to be redeemed
       pursuant to this Indenture.

       "Reference Dealer" means a dealer engaged in the trading of convertible
       securities.

       "Reference Period" has the meaning set forth in Section 12.4(d).

       "Register" has the meaning specified in Section 2.5.

       "Registrar" has the meaning specified in Section 2.5.

       "Registration Rights Agreement" means the Registration Rights Agreement
       dated as of September 28, 2000, between the Company and Placement Agent.

       "Regular Record Date" for the interest (including Additional Amounts, if
       any) on the Securities payable means the September 15 (whether or not a
       Business Day) next preceding an Interest Payment Date on October 1 and
       the March 15 (whether or not a Business Day) next preceding an Interest
       Payment Date on April 1.

       "Repurchase Date" has the meaning specified in Section 11.1.

                                       8
<PAGE>   18

       "Repurchase Price" has the meaning specified in Section 11.1.

       "Repurchase Right" has the meaning specified in Section 11.1.

       "Responsible Officer", when used with respect to the Trustee, means any
       officer of the Trustee, including any vice president, assistant vice
       president, secretary, assistant secretary, the treasurer, any assistant
       treasurer, the managing director, any trust officer, or any other officer
       of the Trustee customarily performing functions similar to those
       performed by any of the above designated officers and also means, with
       respect to a particular corporate trust matter, any other officer to whom
       such matter is referred because of such officer's knowledge of and
       familiarity with the particular subject.

       "Restricted Securities" means the Securities defined as such in Section
       2.3.

       "Restricted Securities Legend" has the meaning set forth in Section
       2.3(a).

       "Rule 144" means Rule 144 under the Securities Act (including any
       successor rule thereof), as the same may be amended from time to time.

       "Rule 144A" means Rule 144A as promulgated under the Securities Act
       (including any successor rule thereof), as the same may be amended from
       time to time.

       "SEC" means the Securities and Exchange Commission.

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

       "Securities Act" means the Securities Act of 1933, as amended.

       "Senior Debt" means the principal of, premium, if any, interest
       (including all interest accruing subsequent to the commencement of any
       bankruptcy or similar proceeding, whether or not a claim for
       post-petition interest is allowable as a claim in any such proceeding)
       and rent payable on or termination payment with respect to or in
       connection with, and all fees, costs, expenses and other amounts accrued
       or due on or in connection with, Indebtedness of the Company, whether
       outstanding on the date of this Indenture or thereafter created,
       incurred, assumed, guaranteed or in effect guaranteed by the Company
       (including all deferrals, renewals, extensions or refundings of, or
       amendments, modifications or supplements to, the foregoing), unless in
       the case of any particular Indebtedness the instrument creating or
       evidencing the same or the assumption or guarantee thereof expressly
       provides that such Indebtedness shall not be senior in right of payment
       to the Securities or expressly provides that such Indebtedness is pari
       passu or junior to the Securities. Notwithstanding the foregoing, the
       term "Senior Debt" shall include, without limitation, all Designated
       Senior Debt, and shall not include Indebtedness of the Company to any
       Subsidiary.

       "Shelf Registration Statement" has the meaning specified in the
       Registration Rights Agreement.

       "Significant Subsidiary" means any Subsidiary which is a "significant
       subsidiary" within the meaning of Rule 405 under the Securities Act.

                                       9
<PAGE>   19

       "Special Record Date" for the payment of any Defaulted Interest means a
       date fixed by the Trustee pursuant to Section 2.17.

       "Stated Maturity" means the date specified in any Security as the fixed
       date for the payment of principal on such Security or on which an
       installment of interest (including Additional Amounts, if any) on such
       Security is due and payable.

       "Subsidiary" means a corporation more than 50% of the outstanding voting
       stock of which is owned, directly or indirectly, by the Company or by one
       or more other Subsidiaries, or by the Company and one or more other
       Subsidiaries. For the purposes of this definition only, "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.

       "TIA" means the Trust Indenture Act of 1939, as amended (15 U.S. Code
       Section 77aaa-77bbbb), as in effect on the date of this Indenture;
       provided, however, that in the event the TIA is amended after such date,
       "TIA" means, to the extent such amendment is applicable to this
       Indenture, the Trust Indenture Act of 1939, as so amended, or any
       successor statute.

       "Trading Day" means:

       (1) if the applicable security is listed or admitted for trading on the
           New York Stock Exchange or another national security exchange, a day
           on which the New York Stock Exchange or such other national security
           exchange is open for business;

       (2) if the applicable security is quoted on the Nasdaq National Market,
           a day on which trades may be made thereon; or

       (3) if the applicable security is not so listed, admitted for trading or
           quoted, any day other than a Saturday or Sunday or a day on which
           banking institutions in the State of New York are authorized or
           obligated by law or executive order to close.

       "Trading Price" of a security on any date of determination means:

       (1) the closing sale price (or, if no closing sale price is reported, the
           last reported sale price) of such security (regular day) on the New
           York Stock Exchange on such date;

       (2) if such security is not listed for trading on the New York Stock
           Exchange on any such date, the closing sale price as reported in the
           composite transactions for the principal U.S. securities exchange on
           which such security is so listed;

       (3) if such security is not so listed on a U.S. national or regional
           securities exchange, the closing sale price as reported by the
           NASDAQ National Market;

                                       10
<PAGE>   20

       (4) if such security is not so reported, the last price quoted by
           Interactive Data Corporation for such security or, if Interactive
           Data Corporation is not quoting such price, a similar quotation
           service selected by the Company;

       (5) if such security is not so quoted, the average of the mid- point of
           the last bid and ask prices for such security from at least two
           dealers recognized as market-makers for such security; or

       (6) if such security is not so quoted, the average of the last bid and
           ask prices for such security from a Reference Dealer.

       "Transfer Agent" means any Person, which may be the Company, authorized
       by the Company to exchange or register the transfer of Securities.

       "Trigger Event" has the meaning specified in Section 12.4(d).

       "Trigger Percentage" has the meaning specified in Section 10.1(a).

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

       "U.S. Government Obligations" means: (1) direct obligations 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 (2) obligations of a person
       controlled or supervised by and acting as an agency or instrumentality of
       the United States of America, the payment of which is unconditionally
       guaranteed as a full faith and credit obligation by the United States of
       America and which in either case, are non-callable at the option of the
       Company thereof.

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

Section 1.2  Incorporation by Reference of Trust Indenture Act.

Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.

The following TIA terms used in this Indenture have the following meanings:

       "indenture securities" means the Securities;

       "indenture security holder" means a Holder;

       "indenture to be qualified" means this Indenture;

       "indenture trustee" or "institutional trustee" means the Trustee; and

                                       11
<PAGE>   21

       "obligor" on the Securities means the Company and any other obligor on
       the indenture securities.

       All other TIA terms used in this Indenture that are defined by the TIA,
       defined by TIA reference to another statute or defined by SEC rule have
       the meanings assigned to them by such definitions.

Section 1.3  Rules of Construction.

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

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

       (2) all accounting terms not otherwise defined herein have the meanings
           assigned to them in accordance with accounting principles generally
           accepted in the United States prevailing at the time of any relevant
           computation hereunder; and

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

                                    ARTICLE 2

                                 THE SECURITIES

Section 2.1  Title and Terms.

       (a) The Securities shall be known and designated as the "8.0% Convertible
       Subordinated Notes due 2005" of the Company. The aggregate principal
       amount of Securities which may be authenticated and delivered under this
       Indenture is limited to $20,000,000, except for Securities authenticated
       and delivered upon registration of, transfer of, or in exchange for, or
       in lieu of other Securities pursuant to Section 2.7, 2.8, 2.9, 2.12, 7.5,
       10.8, 11.1 or 12.2. The Securities shall be issuable in denominations of
       $1,000 or integral multiples thereof.

       (b) The Securities shall mature on September 30, 2005.

       (c) Interest shall accrue from September 28, 2000 at the Interest Rate
       until the principal thereof is paid or made available for payment.
       Interest shall be payable semiannually in arrears on April 1 and October
       1 each year, commencing April 1, 2001.

       (d) Interest on the Securities shall be computed (i) for any full
       semi-annual period for which a particular Interest Rate is applicable, on
       the basis of a 360-day year of twelve 30-day months and (ii) for any
       period for which a particular Interest Rate is applicable shorter than a
       full semiannual period for which interest is calculated, on the basis of
       a 30-day month and, for such periods of less than a month, the actual
       number of days elapsed over a 30-day month.

       (e) A Holder of any Security at the close of business on a Regular Record
       Date shall be entitled to receive interest (including Additional Amounts,
       if any) on such Security on the corresponding

                                       12
<PAGE>   22

       Interest Payment Date. A Holder of any Security which is converted after
       the close of business on a Regular Record Date and prior to the
       corresponding Interest Payment Date (other than any Security whose
       Maturity is prior to such Interest Payment Date) shall be entitled to
       receive interest (including Additional Amounts, if any) on the principal
       amount of such Security, notwithstanding the conversion of such Security
       prior to such Interest Payment Date. However, any such Holder which
       surrenders any such Security for conversion during the period between the
       close of business on such Regular Record Date and ending with the opening
       of business on the corresponding Interest Payment Date shall be required
       to pay the Company an amount equal to the interest (including Additional
       Amounts, if any) on the principal amount of such Security so converted,
       which is payable by the Company to such Holder on such Interest Payment
       Date, at the time such Holder surrenders such Security for conversion.
       Notwithstanding the foregoing, any such Holder which surrenders for
       conversion any Security which has been called for redemption by the
       Company in a notice of redemption given by the Company pursuant to
       Section 10.5 shall be entitled to receive (and retain) such interest
       (including Additional Amounts, if any) and need not pay the Company an
       amount equal to the interest (including Additional Amounts, if any) on
       the principal amount of such Security so converted at the time such
       Holder surrenders such Security for conversion.

       (f) Principal of, and premium, if any, and interest on, Global Securities
       shall be payable to the Depositary in immediately available funds.

       (g) Principal and premium, if any, on Physical Securities shall be
       payable at the office or agency of the Company maintained for such
       purpose, initially the Corporate Trust Office of the Trustee. Interest on
       Physical Securities will be payable by (i) U.S. Dollar check drawn on a
       bank in the City of New York mailed to the address of the Person entitled
       thereto as such address shall appear in the Register, or (ii) upon
       application to the Registrar not later than the relevant Record Date by a
       Holder of an aggregate principal amount of Securities in excess of
       $5,000,000, wire transfer in immediately available funds, which
       application shall remain in effect until the Holder notifies, in writing,
       the Registrar to the contrary.

       (h) The Securities shall be redeemable at the option of the Company as
       provided in Article 10.

       (i) The Securities shall be repurchaseable by the Company at the option
       of Holders as provided in Article 11.

       (j) The Securities shall be convertible at the option of the Holders as
       provided in Article 12.

       (k) The Securities shall be subordinated in right of payment to Senior
       Debt of the Company as provided in Article 13.

Section 2.2  Form of Securities.

       (a) Except as otherwise provided pursuant to this Section 2.2, the
       Securities are issuable in fully registered form without coupons in
       substantially the form of Exhibit A hereto, with such applicable legends
       as are provided for in Section 2.3. The Securities are not issuable in
       bearer form. The terms and provisions contained in the form of Security
       shall constitute, and are hereby expressly made, a part of this Indenture
       and to the extent applicable, the Company and the Trustee, by their
       execution

                                       13
<PAGE>   23

       and delivery of this Indenture, expressly agree to such terms and
       provisions and to be bound thereby. Any of the Securities may have such
       letters, numbers or other marks of identification and such notations,
       legends and endorsements as the officers executing the same may approve
       (execution thereof to be conclusive evidence of such approval) and as are
       not inconsistent with the provisions of this Indenture, or as may be
       required to comply with any law or with any rule or regulation made
       pursuant thereto or with any rule or regulation of any securities
       exchange or automated quotation system on which the Securities may be
       listed or designated for issuance, or to conform to usage.

       (b) The Securities are being offered and sold by the Company pursuant to
       the Placement Agreement. Securities offered and sold to QIBs in
       accordance with Rule 144A, each as provided in the Placement Agreement,
       shall be issued initially in the form of one or more permanent global
       Securities in fully registered form without interest coupons,
       substantially in the form of Exhibit A hereto, with the applicable
       legends as provided in Section 2.3 (each a "Global Security" and
       collectively the "Global Securities"). Each Global Security shall be duly
       executed by the Company and authenticated and delivered by the Trustee,
       and shall be registered in the name of the Depositary or its nominee and
       retained by the Trustee, as Custodian, at its Corporate Trust Office, for
       credit to the accounts of the Agent Members holding the Securities
       evidenced thereby. The aggregate principal amount of the Global
       Securities may from time to time be increased or decreased by adjustments
       made on the records of the Trustee, as Custodian, and of the Depositary
       or its nominee, as hereinafter provided.

       (c) Securities that are issued to Accredited Investors that are not QIBs
       (each individually an "Accredited Investor" and collectively the
       "Accredited Investors") shall not be issued in the form of Global
       Securities. Such Securities shall only be issued in definitive, fully
       registered form without interest coupons, substantially in the form of
       Exhibit A hereto, with the applicable legends as provided in Section 2.3
       (individually, a "Physical Security" and collectively, the "Physical
       Securities") and only to an Accredited Investor that has executed and
       delivered to the Registrar a letter or subscription agreement containing
       provisions substantially in the form of Exhibit B hereto (each an
       "Investment Representation Letter"). Physical Securities acquired by QIBs
       in accordance with Rule 144A may be exchanged for interests in Global
       Securities pursuant to Section 2.9(b). Physical Securities shall be duly
       executed by the Company and authenticated and delivered by the Trustee
       and shall be registered in the name of the Institutional Accredited
       Investor purchasing such Security.

Section 2.3  Legends.

       (a) Restricted Securities Legends.

       Each Security issued hereunder shall, upon issuance, bear the legend set
       forth in Section 2.3(a)(i), and each stock certificate representing
       shares of Common Stock issued upon conversion of any Security issued
       hereunder, shall, upon issuance, bear the legend set forth in Section
       2.3(a)(ii)(each such legend, a "Restricted Securities Legend"), and such
       legend shall not be removed except as provided in Section 2.3(a)(iii).
       Each Security that bears or is required to bear the Restricted Securities
       Legend set forth in Section 2.3(a)(i) (together with each stock
       certificate representing shares of Common Stock issued upon conversion of
       such Security that bears or is required to bear

                                       14
<PAGE>   24

       the Restricted Securities Legend set forth in Section 2.3(a)(ii),
       collectively, the "Restricted Securities") shall be subject to the
       restrictions on transfer set forth in this Section 2.3(a) (including the
       Restricted Securities Legend set forth below), and the Holder of each
       such Restricted Security, by such Holder's acceptance thereof, shall be
       deemed to have agreed to be bound by all such restrictions on transfer.

       As used in Section 2.3(a), the term "transfer" encompasses any sale,
       pledge, transfer or other disposition whatsoever of any Restricted
       Security.

              (i) Restricted Securities Legend for Securities.

              Except as provided in Section 2.3(a)(iii), until two years after
              the original issuance date of any Security, any certificate
              evidencing such Security (and all Securities issued in exchange
              therefor or substitution thereof, other than stock certificates
              representing shares of Common Stock, if any, issued upon
              conversion thereof which shall bear the legend set forth in
              Section 2.3(a)(ii), if applicable) shall bear a Restricted
              Securities Legend in substantially the following form:

         THE SECURITY EVIDENCED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR
         ANY STATE SECURITIES LAWS AND MAY NOT BE REOFFERED, RESOLD, PLEDGED OR
         OTHERWISE TRANSFERRED EXCEPT AS PERMITTED BY THE FOLLOWING SENTENCES.
         THE HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS CONVERTIBLE NOTE
         REPRESENTS, ACKNOWLEDGES AND AGREES THAT IT WILL NOT REOFFER, RESELL,
         PLEDGE OR OTHERWISE TRANSFER THIS SECURITY OR THE COMMON STOCK
         ISSUABLE UPON CONVERSION OF THIS SECURITY EXCEPT IN COMPLIANCE WITH THE
         SECURITIES ACT AND IN ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES
         LAWS AND ONLY: (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A
         QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
         SECURITIES ACT, (C) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE
         904 UNDER THE SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM
         REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF
         AVAILABLE), (E) TO AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501
         UNDER THE SECURITIES ACT (AN "ACCREDITED INVESTOR") THAT IS ACQUIRING
         THE SECURITIES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF ONE OR MORE
         OTHER ACCREDITED INVESTORS OVER WHICH IT EXERCISES SOLE INVESTMENT
         DISCRETION THAT IS PURCHASING SECURITIES IN DEFINITIVE FORM AND THAT
         PRIOR TO SUCH TRANSFER, DELIVERS A SIGNED LETTER TO THE COMPANY AND THE
         TRUSTEE (OR THE TRANSFER AGENT IN THE CASE OF COMMON STOCK ISSUABLE
         UPON CONVERSION THEREOF) CERTIFYING THAT IT AND EACH SUCH ACCOUNT IS
         SUCH AN ACCREDITED INVESTOR AND IS ACQUIRING THE SECURITIES OR THE
         COMMON STOCK ISSUABLE UPON CONVERSION THEREOF FOR INVESTMENT PURPOSES
         AND NOT FOR DISTRIBUTION AND AGREEING TO THE RESTRICTIONS ON TRANSFER
         OF THE SECURITIES OR THE COMMON STOCK

                                       15
<PAGE>   25

         ISSUABLE UPON CONVERSION THEREOF OR (F) PURSUANT TO A REGISTRATION
         STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT
         AND WHICH CONTINUES TO BE EFFECTIVE AT THE TIME OF SUCH TRANSFER. THE
         HOLDER HEREOF AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE
         SECURITY EVIDENCED HEREBY IS TRANSFERRED (OTHER THAN A TRANSFER
         PURSUANT TO CLAUSE (F) OF THE FOREGOING SENTENCE) A NOTICE
         SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

         IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) OR (E) ABOVE,
         THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE
         TRUSTEE (OR ANY SUCCESSOR TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS,
         LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY
         REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN
         EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED UPON
         THE EARLIER OF THE TRANSFER OF THE SECURITY EVIDENCED HEREBY PURSUANT
         TO CLAUSE (F) ABOVE.

              (ii) restricted Securities Legend for Common Stock Issued Upon
              Conversion of the Securities.

              Until two years after the original issuance date of any Security,
              each stock certificate representing shares of Common Stock issued
              upon conversion of such Security shall bear a Restricted
              Securities Legend in substantially the following form:

         THE SECURITY EVIDENCED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR
         ANY STATE SECURITIES LAWS AND MAY NOT BE REOFFERED, RESOLD, PLEDGED OR
         OTHERWISE TRANSFERRED EXCEPT AS PERMITTED BY THE FOLLOWING SENTENCES.
         THE HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS SECURITY REPRESENTS,
         ACKNOWLEDGES AND AGREES THAT IT WILL NOT REOFFER, RESELL, PLEDGE OR
         OTHERWISE TRANSFER THIS SECURITY EXCEPT IN COMPLIANCE WITH THE
         SECURITIES ACT AND IN ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES
         LAWS AND ONLY: (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A
         QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
         SECURITIES ACT, (C) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE
         904 UNDER THE SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM
         REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF
         AVAILABLE), (E) TO AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501
         UNDER THE SECURITIES ACT (AN "ACCREDITED INVESTOR") THAT IS ACQUIRING
         THE SECURITIES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF ONE OR MORE
         OTHER ACCREDITED INVESTORS OVER WHICH IT EXERCISES SOLE INVESTMENT
         DISCRETION THAT IS PURCHASING SECURITIES IN DEFINITIVE FORM AND THAT
         PRIOR TO SUCH TRANSFER,

                                       16
<PAGE>   26

         DELIVERS A SIGNED LETTER TO THE COMPANY AND THE TRUSTEE (OR THE
         TRANSFER AGENT IN THE CASE OF COMMON STOCK ISSUABLE UPON CONVERSION
         THEREOF) CERTIFYING THAT IT AND EACH SUCH ACCOUNT IS SUCH AN ACCREDITED
         INVESTOR AND IS ACQUIRING THE SECURITIES OR THE COMMON STOCK ISSUABLE
         UPON CONVERSION THEREOF FOR INVESTMENT PURPOSES AND NOT FOR
         DISTRIBUTION AND AGREEING TO THE RESTRICTIONS ON TRANSFER OF THE
         SECURITIES OR THE COMMON STOCK ISSUABLE UPON CONVERSION THEREOF OR (F)
         PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE
         UNDER THE SECURITIES ACT AND WHICH CONTINUES TO BE EFFECTIVE AT THE
         TIME OF SUCH TRANSFER. THE HOLDER HEREOF AGREES THAT IT WILL DELIVER TO
         EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY IS TRANSFERRED (OTHER
         THAN A TRANSFER PURSUANT TO CLAUSE (F) OF THE FOREGOING SENTENCE) A
         NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

         IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) OR (E) ABOVE,
         THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE
         TRUSTEE (OR ANY SUCCESSOR TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS,
         LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY
         REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN
         EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
         REQUIREMENTS OF THE SECURITIES ACT.

              (iii) Removal of the Restricted Securities Legends.

              Each Security and each stock certificate representing shares of
              Common Stock issued upon conversion of any Security (other than a
              stock certificate representing shares of Common Stock issued upon
              conversion of a Security that previously has been sold pursuant to
              a registration statement that has been declared effective under
              the Securities Act and which continues to be effective at the time
              of such sale) shall bear the applicable Restricted Securities
              Legend set forth in Section 2.3(a)(i) or 2.3(a)(ii), as the case
              may be, until the earlier of:

              (1) the date which is two years after the original issuance date
              of such Security;

              and

              (2) the date such Security has, or such shares of Common Stock
              have been sold pursuant to a registration statement that has been
              declared effective under the Securities Act (and which continues
              to be effective at the time of such sale).

       The Holder must give notice thereof to the Trustee and any Transfer Agent
       for the Common Stock, as applicable.

       Notwithstanding the foregoing, the Restricted Securities Legend may be
       removed from any Security or any stock certificate representing shares of
       Common Stock issued upon conversion of

                                       17
<PAGE>   27

       any Security if there is delivered to the Company such satisfactory
       evidence, which may include an opinion of independent counsel, as may be
       reasonably required by the Company, that neither such legend nor the
       restrictions on transfer set forth therein are required to ensure that
       transfers of such Security or shares of Common Stock issued upon
       conversion of Securities, as the case may be, will not violate the
       registration requirements of the Securities Act. Upon provision of such
       satisfactory evidence, at the written direction of the Company, as
       provided in accordance with this Indenture, (i) in the case of a
       Security, the Trustee shall authenticate and deliver in exchange for such
       Security another Security or Securities having an equal aggregate
       principal amount that does not bear such legend or (ii) in the case of a
       stock certificate representing shares of Common Stock, the Transfer Agent
       for the Common Stock shall authenticate and deliver in exchange for the
       stock certificate or stock certificates representing such shares of
       Common Stock bearing such legend, one or more new stock certificates
       representing a like aggregate number of shares of Common Stock that do
       not bear such legend. If the Restricted Securities Legend has been
       removed from a Security or stock certificates representing shares of
       Common Stock issued upon conversion of any Security as provided above, no
       other Security issued in exchange for all or any part of such Security or
       stock certificates representing shares of Common Stock issued upon
       conversion of such Security shall bear such legend, unless the Company
       has reasonable cause to believe that such other Security is a "restricted
       security" (or such shares of Common Stock are "restricted securities")
       within the meaning of Rule 144 and instructs the Trustee in writing to
       cause a Restricted Securities Legend to appear thereon.

       Any Security (or Security issued in exchange or substitution therefor) as
       to which such restrictions on transfer shall have expired in accordance
       with their terms or as to which the conditions for removal of the
       Restricted Securities Legend set forth in Section 2.3(a)(i) as set forth
       therein have been satisfied may, upon surrender of such Security for
       exchange to the Registrar in accordance with the provisions of Section
       2.7, be exchanged for a new Security or Securities, of like tenor and
       aggregate principal amount, which shall not bear the Restricted
       Securities Legend required by Section 2.3(a)(i).

       Any stock certificate representing shares of Common Stock issued upon
       conversion of any Security as to which such restrictions on transfer
       shall have expired in accordance with their terms or as to which the
       conditions for removal of the Restricted Securities Legend set forth in
       Section 2.3(a)(ii) as set forth therein have been satisfied may, upon
       surrender of the stock certificates representing such shares of Common
       Stock for exchange in accordance with the procedures of the Transfer
       Agent for the Common Stock, be exchanged for a new stock certificate or
       stock certificates representing a like aggregate number of shares of
       Common Stock, which shall not bear the Restricted Securities Legend
       required by Section 2.3(a)(ii).

       (b)  Global Security Legend.

       Each Global Security shall also bear the following legend on the face
       thereof:

       THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
       REFERRED TO HEREIN. THIS GLOBAL SECURITY MAY NOT BE EXCHANGED OR
       TRANSFERRED, IN WHOLE BUT NOT IN PART, FOR A SECURITY REGISTERED IN THE
       NAME OF ANY PERSON OTHER THAN DTC OR A NOMINEE

                                       18
<PAGE>   28

       THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES SET FORTH IN THE INDENTURE.
       BENEFICIAL INTERESTS IN THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED
       EXCEPT IN ACCORDANCE WITH THE INDENTURE.

       (c) Legend for Physical Securities.

       Physical Securities, in addition to the legend set forth in Section
       2.3(a)(i), will also bear a legend substantially in the following form:

       THIS SECURITY WILL NOT BE ACCEPTED IN EXCHANGE FOR A BENEFICIAL INTEREST
       IN A GLOBAL SECURITY UNLESS THE HOLDER OF THIS SECURITY, SUBSEQUENT TO
       SUCH EXCHANGE, WILL HOLD EITHER NO NOTES OR A MINIMUM AGGREGATE
       BENEFICIAL INTEREST IN THE NOTES OF AT LEAST TWO HUNDRED FIFTY THOUSAND
       DOLLARS ($250,000).

Section 2.4  Execution, Authentication, Delivery and Dating.

Two Officers shall execute the Securities on behalf of the Company by manual or
facsimile signature. If an Officer whose signature is on a Security no longer
holds that office at the time the Security is authenticated, the Security shall
be valid nevertheless.

At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities certifying that all conditions precedent to the
issuance of the Securities have been fully satisfied, and the Trustee in
accordance with such Company Order shall authenticate and deliver such
Securities as in this Indenture provided and not otherwise.

Each Security shall be dated the date of its authentication.

No Security shall be entitled to any benefit under this Indenture, or be valid
or obligatory for any purpose, unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by or on behalf of 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

The Trustee may appoint an authenticating agent or agents reasonably acceptable
to the Company with respect to the Securities. Unless limited by the terms of
such appointment, an authenticating agent may authenticate Securities whenever
the Trustee may do so. Each reference in this Indenture to authentication by the
Trustee includes authentication by such agent.

Section 2.5  Registrar and Paying Agent.

The Company shall maintain an office or agency where Securities may be presented
for registration of transfer or for exchange (the "Registrar") and an office or
agency where Securities may be presented for payment (the "Paying Agent"). The
Registrar shall keep a register of the Securities (the "Register") and of their
transfer and exchange. The Company may appoint one or more co-Registrars and one
or more

                                       19
<PAGE>   29

additional Paying Agents for the Securities. The term "Paying Agent" includes
any additional paying agent and the term "Registrar" includes any additional
registrar. The Company may change any Paying Agent or Registrar without prior
notice to any Holder.

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

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

       (2) give the Trustee notice of any Default by the Company in the making
       of any payment of principal and premium, if any, or interest (including
       Additional Amounts, if any); and

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

The Company shall give prompt written notice to the Trustee of the name and
address of any Payment Agent who is not a party to this Indenture. If the
Company fails to appoint or maintain another entity as Registrar or Paying
Agent, the Trustee shall act as such. The Company or any Affiliate of the
Company may act as Paying Agent or Registrar; provided, however, that none of
the Company, its subsidiaries or the Affiliates of the foregoing shall act:

              (i) as Paying Agent in connection with redemptions, offers to
              purchase and discharges, except as otherwise specified in this
              Indenture, and

              (ii) as Paying Agent or Registrar if a Default or Event of Default
              has occurred and is continuing.

The Company hereby initially appoints the Trustee as Registrar and Paying Agent
for the Securities.

Section 2.6  Paying Agent to Hold Assets in Trust.

Not later than 11:00 a.m. (New York City time) on each due date of the
principal, premium, if any, and interest (including Additional Amounts, if any)
on any Securities, the Company shall deposit with one or more Paying Agents
money in immediately available funds in an aggregate amount sufficient to pay
the principal, premium, if any, and interest (including Additional Amounts, if
any) due on such date. The Company at any time may require a Paying Agent to pay
all money held by it to the Trustee. Upon payment over to the Trustee, the
Paying Agent (if other than the Company) shall have no further liability for the
money so paid over to the Trustee.

If the Company shall act as a Paying Agent, it shall, prior to or on each due
date of the principal of and premium, if any, or interest (including Additional
Amounts, if any) on any of the Securities, segregate and hold in trust for the
benefit of the Holders a sum sufficient with monies held by all other Paying
Agents,

                                       20
<PAGE>   30

to pay the principal and premium, if any, or interest (including Additional
Amounts, if any) so becoming due until such sums shall be paid to such Persons
or otherwise disposed of as provided in this Indenture, and shall promptly
notify the Trustee of its action or failure to act.

Section 2.7  General Provisions Relating to Transfer and Exchange.

The Securities are issuable only in registered form. A Holder may transfer a
Security only by written application to the Registrar stating the name of the
proposed transferee and otherwise complying with the terms of this Indenture. No
such transfer shall be effected until, and such transferee shall succeed to the
rights of a Holder only upon, final acceptance and registration of the transfer
by the Registrar in the Register. Furthermore, any Holder of a Global Security
shall, by acceptance of such Global Security, agree that transfers of beneficial
interests in such Global Security may be effected only through a book-entry
system maintained by the Holder of such Global Security (or its agent) and that
ownership of a beneficial interest in the Global Security shall be required to
be reflected in a book-entry. Notwithstanding the foregoing, in the case of a
Restricted Security, a beneficial interest in a Global Security being
transferred in reliance on an exemption from the registration requirements of
the Securities Act other than in accordance with Rule 144 or Rule 144A may only
be transferred for a Physical Security.

When Securities are presented to the Registrar with a request to register the
transfer or to exchange them for an equal aggregate principal amount of
Securities of other authorized denominations, the Registrar shall register the
transfer or make the exchange as requested if its requirements for such
transactions are met (including that such Securities are duly endorsed or
accompanied by a written instrument of transfer duly executed by the Holder
thereof or by an attorney who is authorized in writing to act on behalf of the
Holder). Subject to Section 2.4, to permit registrations of transfers and
exchanges, the Company shall execute and, upon receipt of a Company Order, the
Trustee shall authenticate Securities at the Registrar's request. No service
charge shall be made for any registration of transfer or exchange or redemption
of the Securities, but the Company may require payment of a sum sufficient to
cover any transfer tax or similar governmental charge payable in connection
therewith (other than any such transfer taxes or other similar governmental
charge payable upon exchanges pursuant to Section 2.14, 7.5 or 10.7).

Neither the Company nor the Registrar shall be required to exchange or register
a transfer of any Securities:

              (1) for a period of 15 Business Days prior to the day of any
              selection of Securities for redemption under Article 10;

              (2) so selected for redemption or, if a portion of any Security is
              selected for redemption, the portion thereof selected for
              redemption; or

              (3) surrendered for conversion or, if a portion of any Security is
              surrendered for conversion, the portion thereof surrendered for
              conversion.

Section 2.8 Book-Entry Provisions for the Global Securities.

       (a)  The Global Securities initially shall:

                                       21
<PAGE>   31

              (i) be registered in the name of the Depositary (or a nominee
              thereof);

              (ii) be delivered to the Trustee as custodian for such Depositary;
              and

              (iii) bear the Restricted Securities Legend set forth in Section
              2.3(a)(i).

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

       (b) The Holder of a Global Security may grant proxies and otherwise
       authorize any Person, including DTC Participants and Persons that may
       hold interests through DTC Participants, to take any action which a
       Holder is entitled to take under this Indenture or the Securities.

       (c) A Global Security may not be transferred, in whole or in part, to any
       Person other than the Depositary (or a nominee thereof), and no such
       transfer to any such other Person may be registered. Beneficial interests
       in a Global Security may be transferred in accordance with the rules and
       procedures of the Depositary and the provisions of Section 2.9.

       (d) If at any time:

              (i)   the Depositary notifies the Company in writing that it is
                    no longer willing or able to continue to act as Depositary
                    for the Global Securities, or the Depositary ceases to be a
                    "clearing agency" registered under the Exchange Act and a
                    successor depositary for the Global Securities is not
                    appointed by the Company within 90 days of such notice or
                    cessation;

              (ii)  the Company, at its option, notifies the Trustee in
                    writing that it elects to cause the issuance of the
                    Physical Securities under this Indenture in exchange for
                    all or any part of the Securities represented by a Global
                    Security or Global Securities; or

              (iii) an Event of Default has occurred and is continuing and
                    the Registrar has received a request from the Depositary
                    for the issuance of Physical Securities in exchange for
                    such Global Security or Global Securities;

              the Depositary shall surrender such Global Security or Global
              Securities to the Trustee for cancellation and the Company shall
              execute, and the Trustee, upon receipt of an Officers' Certificate
              and Company Order for the authentication and delivery of
              Securities, shall

                                       22
<PAGE>   32

              authenticate and deliver in exchange for such Global Security or
              Global Securities, Physical Securities in an aggregate principal
              amount equal to the aggregate principal amount of such Global
              Security or Global Securities. Such Physical Securities shall be
              registered in such names as the Depositary shall identify in
              writing as the beneficial owners of the Securities represented by
              such Global Security or Global Securities (or any nominee
              thereof).

       (e) Notwithstanding the foregoing, in connection with any transfer of
       beneficial interests in a Global Security to the beneficial owners
       thereof pursuant to Section 2.8(d), the Registrar shall reflect on its
       books and records the date and a decrease in the principal amount of such
       Global Security in an amount equal to the principal amount of the
       beneficial interests in such Global Security to be transferred.

Section 2.9  Special Transfer Provisions.

Unless a Security is (i) transferred after the time period referred to in Rule
144(k) under the Securities Act or (ii) sold pursuant to a registration
statement that has been declared effective under the Securities Act (and which
continues to be effective at the time of such sale), the following provisions
shall apply to any sale, pledge or other transfer of Securities:

       (a)  Transfers of Securities to an Accredited Investor which is not a
       QIB.

       The following provisions shall apply with respect to the registration of
       any proposed transfer of Securities to an Accredited Investor which is
       not a QIB:

              (i) The Registrar shall register the transfer if the proposed
              transferee has delivered to the Trustee (A) a certificate
              substantially in the form of Exhibit B annexed hereto and (B) such
              opinion of counsel and other evidence satisfactory to the Company
              that such transfer is in compliance with the Securities Act, as
              requested by the Company.

              (ii) If the proposed transferor is an Agent Member holding a
              beneficial interest in Global Securities, upon receipt by the
              Registrar of the documents required by clause (i) of this Section
              2.9(a), the Depositary and the Registrar, the Registrar shall
              reflect on its books and records, or the Registrar shall instruct
              the Depositary to note or cause to be noted on such Global
              Securities, the date and a decrease in the principal amount of the
              Global Securities in an amount equal to the principal amount of
              the beneficial interest in the Global Securities to be
              transferred, and the Company shall execute, and the Trustee shall
              authenticate and deliver, one or more Physical Securities of like
              tenor and amount registered in the name of the transferee.

              (iii) If the Securities to be transferred consist of Physical
              Securities, upon receipt by the Registrar of the documents
              required by clause (i) of this Section 2.9(a), the Company shall
              execute and, upon receipt of a Company Order, the Trustee shall
              authenticate and deliver, new Physical Securities registered in
              the name of the transferee and the Trustee shall cancel the
              Physical Securities presented for transfer.

                                       23
<PAGE>   33

       (b)  Transfer of Securities to a QIB.

       The following provisions shall apply with respect to the registration of
       any proposed transfer of Securities to a QIB:

              (i) If the Securities to be transferred consist of a beneficial
              interest in the Global Securities, the transfer of such interest
              may be effected only through the book-entry systems maintained by
              the Depositary.

              (ii) If the Securities to be transferred consist of Physical
              Securities, the Registrar shall register the transfer if such
              transfer is being made by a proposed transferor who has checked
              the box provided for on the form of Security stating (or has
              otherwise advised the Company and the Registrar in writing) that
              the sale has been made:

                     in compliance with the provisions of Rule 144A to a
                     transferee who has signed the certification provided for on
                     the form of Security stating or has otherwise advised the
                     Company and the Registrar in writing that:

                            (1) it is purchasing the Securities for its own
                            account or an account with respect to which it
                            exercises sole investment discretion, in each case
                            for investment and not with a view to distribution;

                            (2) it and any such account is a QIB within the
                            meaning of Rule 144A;

                            (3) it is aware that the sale to it is being made in
                            reliance on Rule 144A;

                            (4) it acknowledges that it has received such
                            information regarding the Company as it has
                            requested pursuant to Rule 144A or has determined
                            not to request such information; and

                            (5) it is aware that the transferor is relying upon
                            its foregoing representations in order to claim the
                            exemption from registration provided by Rule 144A,
                            or

              In addition, the Registrar shall reflect on its books and records
              the date and an increase in the principal amount of the Global
              Securities in an amount equal to the aggregate principal amount of
              the Physical Securities to be transferred, and the Trustee shall
              cancel the Physical Securities so transferred.

       (c)  Other Exchanges.

       In the event that Global Securities are exchanged for Securities in
       definitive registered form pursuant to Section 2.8 prior to the
       effectiveness of a Shelf Registration Statement with respect to such
       Securities, such Securities may be exchanged only in accordance with the
       provisions of clauses (a) and (b) above (including the certification
       requirements intended to ensure that such transfers comply with Rule
       144A) and such other procedures as may from time to time be adopted by
       the Company.

                                       24
<PAGE>   34

       (d)  General.

       By its acceptance of any Security bearing the Restricted Securities
       Legend, each Holder of such a Security acknowledges the restrictions on
       transfer of such Security set forth in this Indenture and agrees that it
       will transfer such Security only as provided in this Indenture. The
       Registrar shall not register a transfer of any Security unless such
       transfer complies with the restrictions on transfer of such Security set
       forth in this Indenture. The Registrar shall be entitled to receive and
       rely on written instructions from the Company verifying that such
       transfer complies with such restrictions on transfer. In connection with
       any transfer of Securities, each Holder agrees by its acceptance of the
       Securities to furnish such certifications, legal opinions or other
       information as either of the Company may reasonably require to confirm
       that such transfer is being made pursuant to an exemption from, or a
       transaction not subject to, the registration requirements of the
       Securities Act; provided that the Registrar shall not be required to
       determine (but may rely on a determination made by the Company with
       respect to) the sufficiency of any such certifications, legal opinions or
       other information.

The Registrar shall retain copies of all certifications, letters, notices and
other written communications received pursuant to Section 2.8 hereof or this
Section 2.9. The Company shall have the right to inspect and make copies of all
such letters, notices or other written communications at any reasonable time
upon the giving of reasonable written notice to the Registrar.

Section 2.10 Holder Lists.

The Trustee shall preserve in as current a form as is reasonably practicable the
most recent list available to it of the names and addresses of Holders and shall
otherwise comply with Section 312(a) of the TIA. If the Trustee is not the
Registrar, the Company shall furnish to the Trustee prior to or on each Interest
Payment Date and at such other times as the Trustee may request in writing a
list in such form and as of such date as the Trustee may reasonably require of
the names and addresses of Holders relating to such Interest Payment Date or
request, as the case may be. The Trustee may conclusively rely upon such list
provided by the Company until otherwise notified by the Company or such list is
amended by the Company.

Section 2.11 Persons Deemed Owners.

The Company, the Trustee and any agent of the Company or the Trustee may treat
the Holder as the owner of such Security for the purpose of receiving payment of
principal of and premium, if any, and interest (including Additional Amounts, if
any) on such Security and for all other purposes whatsoever, whether or not such
Security be overdue, and notwithstanding any notice of ownership or writing
thereon, or any notice of previous loss or theft or other interest therein.

Neither the Trustee nor any agent of the Trustee shall have any responsibility
or liability for any aspect of the records relating to or payments made on
account of beneficial ownership interests of a security in global form or for
maintaining, supervising or reviewing any records relating to such beneficial
interests.

                                       25
<PAGE>   35

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

Section 2.12 Mutilated, Destroyed, Lost or Stolen Securities.

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

If there is delivered to the Company and the Trustee

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

              (2) such security or indemnity as may be 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, upon receipt of a Company Order, the Trustee
              shall authenticate and deliver, in lieu of any such destroyed,
              lost or stolen Security, a new Security of like tenor and
              principal amount and bearing a number not contemporaneously
              outstanding.

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

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

Every new Security issued pursuant to this Section 2.12 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 such new
Security shall be entitled to all the benefits of this Indenture equally and
proportionately with any and all other Securities duly issued hereunder.

The provisions of this Section 2.12 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 2.13 Treasury Securities.

In determining whether the Holders of the requisite principal amount of
Outstanding Securities are present at a meeting of Holders for quorum purposes
or have given any request, demand, authorization,

                                       26
<PAGE>   36

direction, notice, consent or waiver hereunder, Securities owned by the Company
or any Affiliate of the Company shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such determination as to the presence of a quorum or upon
any such request, demand, authorization, direction, notice, consent or waiver,
only such Securities of which the Trustee has received written notice and are so
owned shall be so disregarded.

Section 2.14 Temporary Securities.

Pending the preparation of Securities in definitive form, the Company may
execute and the Trustee shall, upon receipt of a Company Order, authenticate and
deliver temporary Securities (printed or lithographed). Temporary Securities
shall be issuable in any authorized denomination, and substantially in the form
of the Securities in definitive form but with such omissions, insertions and
variations as may be appropriate for temporary Securities, all as may be
determined by the Company. Every such temporary Security shall be executed by
the Company and, upon receipt of a Company Order, authenticated by the Trustee
upon the same conditions and in substantially the same manner, and with the same
effect, as the Securities in definitive form. Without unreasonable delay, the
Company will execute and deliver to the Trustee Securities in definitive form
(other than in the case of Securities in global form) and thereupon any or all
temporary Securities (other than any such Securities in global form) may be
surrendered in exchange therefor, at each office or agency maintained by the
Company pursuant to Section 9.2 and, upon receipt of a Company Order, the
Trustee shall authenticate and deliver in exchange for such temporary Securities
an equal aggregate principal amount of Securities in definitive form. Such
exchange shall be made by the Company at its own expense and without any charge
therefor. Until so exchanged, the temporary Securities shall in all respects be
entitled to the same benefits and subject to the same limitations under this
Indenture as Securities in definitive form authenticated and delivered
hereunder.

Section 2.15 Cancellation.

All securities surrendered for payment, redemption, repurchase, conversion,
registration of transfer or exchange shall, if surrendered to any Person other
than the Trustee, be delivered to the Trustee. All Securities so delivered shall
be canceled promptly by the Trustee, and no Securities shall be issued in lieu
thereof except as expressly permitted by any of the provisions of this
Indenture. Upon written instructions of the Company, the Trustee shall destroy
canceled Securities and, after such destruction, shall deliver a certificate of
such destruction to the Company. If the Company shall acquire any of the
Securities, such acquisition shall not operate as a redemption or satisfaction
of the indebtedness represented by such Securities unless the same are delivered
to the Trustee for cancellation.

Section 2.16 CUSIP Numbers.

The Company in issuing the Securities may use "CUSIP" numbers (if then generally
in use), and the Trustee shall use CUSIP numbers in notices of redemption or
exchange as a convenience to Holders; provided that any such notice shall state
that no representation is made as to the correctness of such numbers either as
printed on the Securities or as contained in any such notice 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 shall promptly notify the Trustee of any
change in the CUSIP numbers.

                                       27
<PAGE>   37

Section 2.17 Defaulted Interest.

If the Company fails to make a payment of interest (including Additional
Amounts, if any) on any Security when due and payable ("Defaulted Interest"), it
shall pay such Defaulted Interest plus (to the extent lawful) any interest
payable on the Defaulted Interest, in any lawful manner. It may elect to pay
such Defaulted Interest, plus any such interest payable on it, to the Persons
who are Holders of such Securities on which the interest is due on a subsequent
Special Record Date. The Company shall notify the Trustee in writing of the
amount of Defaulted Interest proposed to be paid on each such Security. The
Company shall fix any such

Special Record Date and payment date for such payment. At least 15 days before
any such Special Record Date, the Company shall mail to Holders affected thereby
a notice that states the Special Record Date, the Interest Payment Date, and
amount of such interest (and such Additional Amounts, if any) to be paid.

                                    ARTICLE 3

                           SATISFACTION AND DISCHARGE

Section 3.1  Satisfaction and Discharge of Indenture.

When:

              (1) the Company shall deliver to the Trustee for cancellation all
              Securities previously authenticated (other than any Securities
              which have been destroyed, lost or stolen and in lieu of, or in
              substitution for which, other Securities shall have been
              authenticated and delivered) and not previously canceled; or

              (2) all the Securities not previously canceled or delivered to the
              Trustee for cancellation shall have become due and payable, or are
              by their terms to become due and payable within one year or are to
              be called for redemption within one year under arrangements
              satisfactory to the Trustee for the giving of notice of
              redemption;

              (3) the Company shall irrevocably deposit with the Trustee, in
              trust, cash in U.S. dollars and/or U.S. Government Obligations
              which through the payment of interest and principal in respect
              thereof, in accordance with their terms, will provide (and without
              reinvestment and assuming no tax liability will be imposed on such
              Trustee), not later than one day before the due date of any
              payment of money, an amount in cash, 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 principal of, premium, if any, or interest
              (including Additional Amounts, if any) on all of the Securities
              (other than any Securities which shall have been mutilated,
              destroyed, lost or stolen and in lieu of or in substitution for
              which other Securities shall have been authenticated and
              delivered) not previously canceled or delivered to the Trustee for
              cancellation, on the dates such payments of principal, premium, if
              any, or interest (including Additional Amounts, if any) are due to
              such date of maturity or redemption, as the case may be and all
              other sums payable hereunder; and

                                       28
<PAGE>   38

              (4) the Company shall have delivered to the Trustee an Officers'
              Certificate and an Opinion of Counsel to the effect that (x) all
              conditions precedent herein provided relating to the satisfaction
              and discharge of this Indenture have been complied with by the
              Company and (y) the Company has received from, or there has been
              published by, the Internal Revenue Service a ruling or (z) since
              the date of execution of this Indenture, there has been a change
              in the applicable federal income tax law, in the case of either
              clause (y) or (z) to the effect that, and based thereon such
              Opinion of Counsel shall confirm that, the Holders will not
              recognize income, gain or loss for federal income tax purposes as
              a result of such deposit and discharge and will be subject to
              federal income tax on the same amount and in the same manner and
              at the same times as would have been the case if such deposit and
              discharge had not occurred; and

if, in the case of either clause (3) or (4), the Company shall also pay or cause
to be paid all other sums payable hereunder by the Company, then this Indenture
shall cease to be of further effect (except as to:

              (i) remaining rights of registration of transfer, substitution and
              exchange and conversion of Securities;

              (ii) rights hereunder of Holders to receive payments of principal
              of and premium, if any, and interest (including Additional
              Amounts, if any) on, the Securities and the other rights, duties
              and obligations of Holders, as beneficiaries hereof with respect
              to the amounts, if any, so deposited with the Trustee; and

              (iii) the rights, obligations and immunities of the Trustee
              hereunder);

and the Trustee, on demand of the Company accompanied by an Officers'
Certificate and an Opinion of Counsel and at the cost and expense of the
Company, shall execute proper instruments acknowledging satisfaction of and
discharging this Indenture; provided, however, that the Company shall reimburse
the Trustee for all amounts due the Trustee under Section 5.8 and for any costs
or expenses thereafter reasonably and properly incurred by the Trustee and to
compensate the Trustee for any services thereafter reasonably and properly
rendered by the Trustee in connection with this Indenture or the Securities.

Section 3.2  Deposited Monies to be Held in Trust.

Subject to Section 3.3, all monies deposited with the Trustee pursuant to
Section 3.1 shall be held in trust and applied by it to the payment,
notwithstanding the provisions of Article 13, either directly or through any
Paying Agent (including the Company if acting as its own Paying Agent), to the
Holders of the particular Securities for the payment or redemption of which such
monies have been deposited with the Trustee, of all sums due and to become due
thereon for principal, premium, if any, and interest (including Additional
Amounts, if any). All monies deposited with the Trustee pursuant to Section 3.1
(and held by it or any Paying Agent) for the payment of Securities subsequently
converted shall be returned to the Company upon request of the Company.

Section 3.3  Return of Unclaimed Monies.

                                       29
<PAGE>   39

The Trustee and the Paying Agent shall pay to the Company any money held by them
for the payment of principal or premium, if any, or interest (including
Additional Amounts, if any) that remains unclaimed for two years after the date
upon which such payment shall have become due. After payment to the Company,
Holders entitled to the money must look to the Company for payment as general
creditors unless an applicable abandoned property law designates another Person,
and all liability of the Trustee and such Paying Agent with respect to such
money shall cease.

                                    ARTICLE 4

                              DEFAULTS AND REMEDIES

Section 4.1  Events of Default.

An "Event of Default" with respect to the Securities occurs when any of the
following occurs (whatever the reason for such Event of Default and whether it
shall be occasioned by the provisions of Article 13 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):

              (a) the Company defaults in the payment of the principal of or
              premium, if any, on any of the Securities when it becomes due and
              payable at Maturity, upon redemption or exercise of a Repurchase
              Right or otherwise, whether or not such payment is prohibited by
              Article 13; or

              (b) the Company defaults in the payment of interest (including
              Additional Amounts or Interest Make-Whole Payment, if any) on any
              of the Securities when it becomes due and payable and such default
              continues for a period of 30 days, whether or not such payment is
              prohibited by Article 13; or

              (c) the Company fails to perform or observe any other term,
              covenant or agreement contained in the Securities or this
              Indenture and the default continues for a period of 60 days after
              written notice of such failure, requiring the Company to remedy
              the same, 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
              aggregate principal amount of the Outstanding Securities; or

              (d) (i) the Company fails to make by the end of the applicable
              grace period, if any, any payment of principal or interest due in
              respect of any Indebtedness for borrowed money, the aggregate
              outstanding principal amount of which is an amount in excess of
              $5,000,000; or (ii) there is an acceleration of any Indebtedness
              for borrowed money in an amount in excess of $5,000,000 because of
              a default with respect to such Indebtedness without such
              Indebtedness having been discharged or such non-payment or
              acceleration having been cured, waived, rescinded or annulled, in
              the case of either (i) or (ii) above, for a period of 30 days
              after written notice to the Company by the Trustee or to the
              Company and the Trustee by Holders of at least 25% in aggregate
              principal amount of the Outstanding Securities; or

              (e) the entry by a court having jurisdiction in the premises of
              (i) a decree or order for relief in respect of the Company in an
              involuntary case or proceeding under any applicable U.S. federal
              or state bankruptcy, insolvency, reorganization or other similar
              law or (ii) a decree or order

                                       30
<PAGE>   40

              adjudging the Company a bankrupt or insolvent, or approving as
              properly filed a petition seeking reorganization, arrangement,
              adjustment or composition of or in respect of the Company under
              any applicable U.S. federal or state law, or appointing a
              custodian, receiver, liquidator, assignee, trustee, sequestrator
              or other similar official of the Company or of any substantial
              part of its property, or ordering the winding up or liquidation of
              its affairs, and the continuance of any such decree or order for
              relief or any such other decree or order unstayed and in effect
              for a period of 60 consecutive days; or

              (f) the commencement by the Company of a voluntary case or
              proceeding under any applicable U.S. 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 the Company to the entry of a decree or order for
              relief in respect of the Company in an involuntary case or
              proceeding under any applicable U.S. federal or state bankruptcy,
              insolvency, reorganization or other similar law or to the
              commencement of any bankruptcy or insolvency case or proceeding
              against the Company, or the filing by the Company of a petition or
              answer or consent seeking reorganization or relief under any
              applicable U.S. federal or state law, or the consent by the
              Company to the filing of such petition or to the appointment of or
              the 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 the Company of an assignment for the benefit of creditors, or
              the admission by the Company in writing of its inability to pay
              its debts generally as they become due, or the taking of corporate
              action by the Company expressly in furtherance of any such action.

Section 4.2  Acceleration of Maturity; Rescission and Annulment.

If an Event of Default with respect to Outstanding Securities (other than an
Event of Default specified in Section 4.1(e) or 4.1(f)) occurs and is
continuing, the Trustee upon the written direction of Holders of no less than
25% of the Outstanding Securities or the Holders of at least 25% in aggregate
principal amount of the Outstanding Securities, by written notice to the
Company, may declare due and payable 100% of the principal amount of all
Outstanding Securities plus any accrued and unpaid interest (including
Additional Amounts, if any) to the date of payment. Upon a declaration of
acceleration, such principal and accrued and unpaid interest (including
Additional Amounts, if any) to the date of payment shall be immediately due and
payable.

If an Event of Default specified in Section 4.1(e) or 4.1(f) occurs, all unpaid
principal and accrued and unpaid interest (including Additional Amounts, if any)
on the Outstanding Securities shall become and be immediately due and payable,
without any declaration or other act on the part of the Trustee or any Holder.

The Holders either (a) through notice to the Trustee of not less than a majority
in aggregate principal amount of the Outstanding Securities, or (b) by the
adoption of a resolution, at a meeting of Holders of the Outstanding Securities
at which a quorum is present, by the Holders of at least a majority in aggregate
principal amount of the Outstanding Securities represented at such meeting, may,
on behalf of the Holders of all of the Securities, rescind and annul an
acceleration and its consequences if:

                                       31
<PAGE>   41

              (1) all existing Events of Default, other than the nonpayment of
              principal of or interest on the Securities which have become due
              solely because of the acceleration, have been remedied, cured or
              waived, and

              (2) the rescission would not conflict with any judgment or decree
              of a court of competent jurisdiction;

provided, however, that in the event such declaration of acceleration has been
made based on the existence of an Event of Default under Section 4.1(d) and the
default with respect to Indebtedness for money borrowed which gave rise to such
Event of Default has been remedied, cured or waived, then, without any further
action by the Holders, such declaration of acceleration shall be rescinded
automatically and the consequences of such declaration shall be annulled. No
such rescission or annulment shall affect any subsequent Default or impair any
right consequent thereon.

Section 4.3  Other Remedies.

If an Event of Default with respect to Outstanding Securities occurs and is
continuing, the Trustee may pursue any available remedy by proceeding at law or
in equity to collect the payment of principal of or interest on the Securities
or to enforce the performance of any provision of the Securities.

The Trustee may maintain a proceeding in which it may prosecute and enforce all
rights of action and claims under this Indenture or the Securities, even if it
does not possess any of the Securities or does not produce any of them in the
proceeding.

Section 4.4  Waiver of Past Defaults.

The Holders, either (a) through the written consent of not less than a majority
in aggregate principal amount of the Outstanding Securities, or (b) by the
adoption of a resolution, at a meeting of Holders of the Outstanding Securities
at which a quorum is present, by the Holders of at least a majority in aggregate
principal amount of the Outstanding Securities represented at such meeting, may,
on behalf of the Holders of all of the Securities, waive an existing Default or
Event of Default, except a Default or Event of Default:

              (1) in the payment of the principal of or premium, if any, or
              interest (including Additional Amounts, if any) on any Security
              (provided, however, that subject to Section 4.7, the Holders of a
              majority in aggregate principal amount of the Outstanding
              Securities may rescind an acceleration and its consequences,
              including any related payment default that resulted from such
              acceleration); or

              (2) in respect of a covenant or provision hereof which, under
              Section 7.2, cannot be modified or amended without the consent of
              the Holders of each Outstanding Security affected.

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

                                       32
<PAGE>   42

Section 4.5  Control by Majority.

The Holders of a majority in aggregate principal amount of the Outstanding
Securities (or such lesser amount as shall have acted at a meeting pursuant to
the provisions of this Indenture) shall have the right to direct the time,
method and place of conducting any proceeding for any remedy available to the
Trustee or exercising any trust or power conferred on the Trustee; provided that
such Holders have provided indemnity acceptable to the Trustee against the
costs, expenses (including reasonable attorneys' fees and expenses) and
liabilities to be incurred in following such direction. However, the Trustee may
refuse to follow any direction that:

              (1) conflicts with any law or with this Indenture;

              (2) the Trustee determines may be unduly prejudicial to the rights
              of the Holders not joining therein (it being understood that the
              Trustee shall have no duty to ascertain whether or not actions or
              forbearance are unduly prejudicial to such Holders); or

              (3) may expose the Trustee to personal liability.

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

Section 4.6  Limitation on Suit.

No Holder of any Security shall have any right to pursue any remedy with respect
to this Indenture or the Securities (including, instituting any proceeding,
judicial or otherwise, with respect to this Indenture or for the appointment of
a receiver or trustee) unless:

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

              (2) the Holders of at least 25% in aggregate principal amount of
              the Outstanding Securities shall have made written request to the
              Trustee to pursue the remedy;

              (3) such Holder or Holders have offered to the Trustee indemnity
              satisfactory to it against any costs, expenses (including
              reasonable attorneys' fees and expenses) and liabilities incurred
              in complying with such request;

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

              (5) during such 60-day period, no direction inconsistent with such
              written request has been given to the Trustee by the Holders of a
              majority in aggregate principal amount of the Outstanding
              Securities (or such amount as shall have acted at a meeting
              pursuant to the provisions of this Indenture);

                                       33
<PAGE>   43

provided, however, that no one or more of such Holders may use this Indenture to
prejudice the rights of another Holder or to obtain preference or priority over
another Holder.

Section 4.7  Unconditional Rights of Holders to Receive Payment 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 premium, if any, and interest (including
Additional Amounts, if any) on such Security on the Stated Maturity expressed in
such Security (or, in the case of redemption, on the Redemption Date, or in the
case of the exercise of a Repurchase Right, on the Repurchase Date) and to
convert such Security in accordance with Article 12, and to bring an action for
the enforcement of any such payment on or after such respective dates and such
right to convert, and such rights shall not be impaired or affected without the
consent of such Holder.

Section 4.8 Collection of Indebtedness and Suits for Enforcement by the Trustee.

The Company covenants that if:

              (1) a Default or Event of Default is made in the payment of any
              interest (including Additional Amounts, if any) on any Security
              when such interest (including Additional Amounts, if any) becomes
              due and payable and such Default or Event of Default continues for
              a period of 30 days; or

              (2) a Default or Event of 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 (as expressed
therein or as a result of any acceleration effected pursuant to Section 4.2) on
such Securities for principal and premium, if any, and interest (including
Additional Amounts, if any) and, to the extent that payment of such interest
shall be legally enforceable, interest on any overdue principal and premium, if
any, and on any overdue interest (including Additional Amounts, if any),
calculated using the Interest Rate, and, in addition thereto, such further
amount as shall be sufficient to cover the costs and expenses of collection,
including the reasonable compensation, expenses, disbursements and advances of
the Trustee, its agents and counsel.

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

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

                                       34
<PAGE>   44

Section 4.9  Trustee May File Proofs of Claim.

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

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

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

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceedings is hereby authorized by
each Holder of Securities to make such payments to the Trustee and, in the event
that the Trustee shall consent to the making of such payments directly to the
Holders of Securities, to pay to the Trustee any amount due to it for the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel and any other amounts due the Trustee under Section 5.8.

Nothing contained herein shall be deemed to authorize the Trustee to authorize
or consent to or accept, or adopt on behalf of any Holder of a Security, any
plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any Holder thereof or to authorize the Trustee to
vote in respect of the claim of any Holder of a Security in any such proceeding.

Section 4.10 Restoration of Rights and Remedies.

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

Section 4.11 Rights and Remedies Cumulative.

                                       35
<PAGE>   45

Except as otherwise provided with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Securities in the last paragraph of Section
2.12, no right or remedy conferred in this Indenture upon or reserved to the
Trustee or to the Holders of Securities is intended to be exclusive of any other
right or remedy, and every right and remedy shall, to the extent permitted by
law, be cumulative and in addition to every other right and remedy given
hereunder or 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 4.12 Delay or Omission Not Waiver.

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

Section 4.13 Application of Money Collected.

Subject to Article 13, any money collected by the Trustee pursuant to this
Article shall be applied in the following order, at the date or dates fixed by
the Trustee and, in case of the distribution of such money on account of
principal or premium, if any, or interest (including Additional Amounts, if
any), 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;

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

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

Section 4.14 Undertaking for Costs.

All parties to this Indenture agree, and each Holder of any Security by such
Holder's acceptance thereof shall be deemed to have agreed, that any court may
in its discretion require, in any suit for the enforcement of any right or
remedy under this Indenture, or in any suit against the Trustee for any action
taken, suffered or omitted by it as Trustee, the filing by any party litigant in
such suit of an undertaking to pay the costs of such suit, and that such court
may in its discretion assess reasonable costs, including reasonable attorneys'
fees, against any party litigant in such suit, having due regard to the merits
and good faith of the claims or defenses made by such party litigant; but the
provisions of this Section shall not apply to any suit instituted by the
Company, to any suit instituted by the Trustee, to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 10% in aggregate
principal amount

                                       36
<PAGE>   46

of the Outstanding Securities, or to any suit instituted by any Holder of any
Security for the enforcement of the payment of the principal of or premium, if
any, or interest (including Additional Amounts, if any) on any Security on or
after the Stated Maturity expressed in such Security (or, in the case of
redemption or exercise of a Repurchase Right, on or after the Redemption Date)
or for the enforcement of the right to convert any Security in accordance with
Article 12.

Section 4.15 Waiver of Stay or Extension Laws.

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

Section 4.16 Enforceability of Claims by Trustee.

All rights of action and claims under this Indenture or the Securities may be
prosecuted and enforced by the Trustee without the possession 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.

                                    ARTICLE 5

                                   THE TRUSTEE

Section 5.1  Certain Duties and Responsibilities.

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

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

              (2) In the absence of bad faith on its part, the Trustee may
              conclusively rely, as to the truth of the statements and the
              correctness of the opinions expressed therein, upon certificates
              or opinions furnished to the Trustee and conforming to the
              requirements of this Indenture; provided, however, that in the
              case of any such certificates or opinions which by any provision
              hereof are specifically required to be furnished to the Trustee,
              the Trustee shall examine the certificates or opinions to
              determine whether or not, on their face, they conform to the
              requirements to this Indenture (but need not investigate or
              confirm the accuracy of any facts stated therein).

                                       37
<PAGE>   47

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

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

              (1) This paragraph (c) shall not be construed to limit the effect
              of paragraph (a) of this Section 5.1;

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

              (3) The Trustee shall not be liable with respect to any action
              taken or omitted to be taken by it in good faith in accordance
              with a direction received by it of the Holders of a majority in
              principal amount of the Outstanding Securities (or such lesser
              amount as shall have acted at a meeting pursuant to the provisions
              of this Indenture) relating to the time, method and place of
              conducting any proceeding for any remedy available to the Trustee,
              or exercising any trust or power conferred upon the Trustee, under
              this Indenture.

       (d) Whether or not herein 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 5.1.

       (e) No provision of this Indenture shall require the Trustee to expend or
       risk its own funds or otherwise incur any liability in the performance of
       any of its duties hereunder, or in the exercise of any of its rights or
       powers. The Trustee may refuse to perform any duty or exercise any right
       or power unless it receives indemnity satisfactory to it against any
       loss, liability, cost or expense (including, without limitation,
       reasonable fees of counsel).

       (f) The Trustee shall not be obligated to pay interest on any money or
       other assets received by it unless otherwise agreed in writing with the
       Company. Assets held in trust by the Trustee need not be segregated from
       other funds except to the extent required by law.

       (g) The Trustee shall not be bound to make any investigation into the
       facts or matters stated in any resolution, certificate, statement,
       instrument, opinion, report, notice, request, direction, consent, order,
       bond, debenture, note, coupon, other evidence of indebtedness or other
       paper or document, but the Trustee, 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

                                       38
<PAGE>   48

       of the Company, personally or by agent or attorney at the sole cost of
       the Company and shall incur no liability or additional liability of any
       kind by reason of such inquiry or investigation.

       (h) The Trustee shall not be deemed to have notice or actual knowledge of
       any 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 a Default is received by the Trustee pursuant to Section 14.2,
       and such notice references the Securities and this Indenture.

       (i) The rights, privileges, protections, immunities and benefits given to
       the Trustee hereunder, including, without limitation, its right to be
       indemnified, are extended to, and shall be enforceable by, the Trustee in
       each of its capacities hereunder, and each Paying Agent, authenticating
       agent, Conversion Agent, Registrar acting hereunder or other agent or
       custodian employed to act hereunder.

Section 5.2  Certain Rights of Trustee.

Subject to the provisions of Section 5.1 and subject to Section 315(a) through
(d) of the TIA:

              (1) The Trustee may rely on any certificate, statement,
              instrument, opinion, report, request, consent order or any other
              document believed by it to be genuine and to have been signed or
              presented by the proper person. The Trustee need not investigate
              any fact or matter stated in the document.

              (2) Before the Trustee acts or refrains from acting, it may
              require an Officers' Certificate or an Opinion of Counsel, or
              both. The Trustee shall not be liable for any action it takes or
              omits to take in good faith in reliance on the Officers'
              Certificate or Opinion of Counsel.

              (3) The Trustee may act through attorneys and agents and shall not
              be responsible for the misconduct or negligence of any attorney or
              agent appointed with due care.

              (4) The Trustee shall not be liable for any action taken or
              omitted to be taken by it in good faith which it believed to be
              authorized or within the discretion or rights or powers conferred
              upon it by this Indenture, unless the Trustee's conduct
              constitutes negligence.

              (5) The Trustee may consult with counsel of its selection and the
              advice of such counsel shall be full and complete authorization
              and protection in respect of any action taken, omitted or suffered
              by it hereunder in good faith and in accordance with the advice or
              opinion of such counsel.

              (6) Unless otherwise specifically provided in this Indenture, any
              demand, request, direction or notice from the Company shall be
              sufficient if signed by an Officer of the Company.

              (7) The permissive rights of the Trustee to do things enumerated
              in this Indenture shall not be construed as a duty unless so
              specified herein.

                                       39
<PAGE>   49

Section 5.3  Individual Rights of Trustee.

The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company or any Affiliate
of the Company with the same rights it would have if it were not Trustee.
However, in the event that the Trustee acquires any conflicting interest (as
such term is defined in Section 310(b) of the TIA), it must eliminate such
conflict within 90 days, apply to the SEC for permission to continue as trustee
(to the extent permitted under Section 310(b) of the TIA) or resign. Any agent
may do the same with like rights and duties. The Trustee is also subject to
Sections 5.11 and 5.12.

Section 5.4  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
expressly agreed with the Company.

Section 5.5  Trustee's Disclaimer.

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

Section 5.6  Notice of Defaults.

Within 90 days after the occurrence of any Default or Event of Default hereunder
of which the Trustee has received written notice, the Trustee shall give notice
to Holders pursuant to Section 14.2, unless such Default or Event of Default
shall have been cured or waived; provided, however, that, except in the case of
a Default or Event of Default in the payment of the principal of or premium, if
any, or interest (including Additional Amounts, if any), or in the payment of
any redemption or repurchase obligation on any Security, the Trustee shall be
protected in withholding such notice if and so long as Responsible Officers of
the Trustee in good faith determine that the withholding of such notice is in
the interest of the Holders.

Section 5.7  Reports by Trustee to Holders.

The Trustee shall transmit to Holders such reports concerning the Trustee and
its actions under this Indenture as may be required by Section 313 of the TIA at
the times and in the manner provided by the TIA.

A copy of each report at the time of its mailing to Holders shall be filed with
the SEC, if required, and each stock exchange, if any, on which the Securities
are listed. The Company shall promptly notify the Trustee when the Securities
become listed on any stock exchange.

                                       40
<PAGE>   50

Section 5.8  Compensation and Indemnification.

The Company covenants and agrees to pay to the Trustee from time to time, and
the Trustee shall be entitled to such compensation as set forth in any fee
arrangement between the Company and the Trustee (which shall not be limited by
any provision of law in regard to the compensation of a trustee of an express
trust) and the Company covenants and agrees to pay or reimburse the Trustee and
each Paying Agent, Authenticating Agent, Registrar or other agent employed
hereunder upon its request for all reasonable expenses, disbursements and
advances incurred or made by or on behalf of it in accordance with any of the
provisions of this Indenture (including the reasonable compensation and the
expenses and disbursements of its counsel and of all agents and other persons
not regularly in its employ), except to the extent that any such expense,
disbursement or advance is due to its negligence or bad faith. When the Trustee
incurs expenses or renders services in connection with an Event of Default
specified in Section 4.1, the expenses (including the reasonable charges and
expenses of its counsel) and the compensation for the services and expenses are
intended to constitute expenses of administration under any bankruptcy law. The
Company also covenants to indemnify the Trustee and each Paying Agent,
Authenticating Agent, Registrar or other agent employed hereunder and each of
their respective officers, directors, employees and agents for, and to hold such
Persons harmless against, any loss, liability, damage, claims, tax or expense
incurred by them, arising out of or in connection with the acceptance or
administration of this Indenture or the trusts hereunder or the performance of
their duties hereunder, including the costs and expenses of defending themselves
against or investigating any claim of liability in the premises, except to the
extent that any such loss, liability or expense was due to the negligence or
willful misconduct of such Persons. The obligations of the Company under this
Section 5.8 to compensate and indemnify the Trustee and each Paying Agent,
Authenticating Agent, Registrar or other agent employed hereunder and each of
their respective officers, directors, employees and agents and to pay or
reimburse such Persons for expenses, disbursements and advances shall constitute
additional indebtedness hereunder and shall survive the termination,
satisfaction and discharge of this Indenture or the earlier resignation or
removal of the Trustee. Such additional indebtedness shall be a lien prior to
that of the Securities upon all property and funds held or collected by the
Trustee as such, and the Securities are hereby subordinated to such senior
claim. "Trustee" for purposes of this Section 5.8 shall include any predecessor
Trustee, but the negligence or willful misconduct of any Trustee shall not
affect the indemnification of any other Trustee.

Section 5.9  Replacement of Trustee.

A resignation or removal of the Trustee and appointment of a successor Trustee
shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 5.9.

The Trustee may resign and be discharged from the trust hereby created by so
notifying the Company in writing. The Holders of at least a majority in
aggregate principal amount of Outstanding Securities may remove the Trustee by
so notifying the Trustee and the Company in writing accompanied evidence that
such action was taken in accordance with the terms of this Indenture. The
Company must remove the Trustee if:

              (i) the Trustee fails to comply with Section 5.11 or Section 310
              of the TIA after written request by the Company or any Holder who
              has been a bona fide Holder for at least six (6) months;

                                       41
<PAGE>   51

              (ii) the Trustee becomes incapable of acting after written request
              by the Company or any Holder who has been a bona fide Holder for
              at least six (6) months;

              (iii) the Trustee is adjudged a bankrupt or an insolvent or an
              order for relief is entered with respect to the Trustee under any
              Bankruptcy Law; or

              (iv) a Custodian or public officer takes charge of the Trustee or
              its property.

              If the Trustee resigns or is removed or if a vacancy exists in the
              office of the Trustee for any reason, the Company shall promptly
              appoint a successor Trustee. The Trustee shall be entitled to
              payment of its fees and reimbursement of its expenses while acting
              as Trustee. Within one year after the successor Trustee takes
              office, the Holders of at least a majority in aggregate principal
              amount of Outstanding Securities may appoint a successor Trustee
              to replace the successor Trustee appointed by the Company.

Any Holder who has qualified as a Holder hereunder for a minimum of six (6)
months may petition any court of competent jurisdiction for the removal of the
Trustee and the appointment of a successor Trustee if the Trustee fails to
comply with Section 5.10.

If an instrument of acceptance by a successor Trustee shall not have been
delivered to the Trustee within 30 days after the giving of such notice of
resignation or removal, the resigning or removed Trustee, as the case may be,
may petition, at the expense of the Company, any court of competent jurisdiction
for the appointment of a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the
retiring Trustee and to the Company. Thereupon the resignation or removal of the
retiring Trustee shall become effective, and the successor Trustee shall have
all the rights, powers and duties of the Trustee under this Indenture. The
Company shall issue a notice of the successor Trustee's succession to the
Holders. Upon payment of its charges, the retiring Trustee shall promptly
transfer all property held by it as Trustee to the successor Trustee, subject
nevertheless to its lien, if any, provided for in Section 5.8. Notwithstanding
replacement of the Trustee pursuant to this Section 5.9, the Company's
obligations under Section 5.8 shall continue for the benefit of the retiring
Trustee with respect to expenses, losses and liabilities incurred by it prior to
such replacement.

Section 5.10 Successor Trustee by Merger, Etc.

Subject to Section 5.11, if the Trustee consolidates with, merges or converts
into, or transfers all or substantially all of its corporate trust business to,
another Person, corporation or national banking association, the successor
entity without any further act shall be the successor Trustee as to the
Securities.

Section 5.11 Corporate Trustee Required; Eligibility.

The Trustee shall at all times satisfy the requirements of Section 310(a)(1),
(2) and (5) of the TIA. The Trustee shall at all times have (or, in the case of
a corporation included in a bank holding company

                                       42
<PAGE>   52

system, the related bank holding company shall at all times have), a combined
capital and surplus of at least $25 million as set forth in its (or its related
bank holding company's) most recent published annual report of condition. The
Trustee is subject to Section 310(b) of the TIA.

Section 5.12 Collection of Claims Against the Company.

The Trustee is subject to Section 311(a) of the TIA, excluding any creditor
relationship listed in Section 311(b) of the TIA. A Trustee who has resigned or
been removed shall be subject to Section 311(a) of the TIA to the extent
indicated therein.

                                    ARTICLE 6

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

Section 6.1  Company May Consolidate, Etc., Only on Certain Terms.

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

              (1) in the event that the Company shall consolidate with or merge
              into another Person or convey, transfer or lease its properties
              and assets substantially as an entirety to any Person, the Person
              formed by such consolidation or into which the Company is merged
              or the Person which acquires by conveyance or transfer, or which
              leases, the properties and assets of the Company substantially as
              an entirety shall be a corporation, limited liability company,
              partnership or trust organized and validly existing under the laws
              of the United States of America, any State thereof or the District
              of Columbia and, if the entity surviving such transaction or
              transferee entity is not the Company, then such surviving or
              transferee entity 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 premium, if any and interest (including
              Additional Amounts, if any), on all the Securities and the
              performance of every covenant of this Indenture on the part of the
              Company to be performed or observed and shall have provided for
              conversion rights in accordance with Section 12.12;

              (2) at the time of consummation of 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 shall have 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.

                                       43
<PAGE>   53

Section 6.2  Successor Corporation Substituted.

Upon any consolidation or merger by the Company with or into any other
corporation or any conveyance, transfer or lease of the properties and assets of
the Company substantially as an entirety to any Person, in accordance with
Section 6.1, the successor corporation 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 corporation had been named as the Company herein, and thereafter,
except in the case of a lease to another Person, the predecessor corporation
shall be relieved of all obligations and covenants under this Indenture and the
Securities.

                                    ARTICLE 7

                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

Section 7.1  Without Consent of Holders of Securities.

Without the consent of any Holders of Securities, the Company, when authorized
by a Board Resolution, and the Trustee, at any time and from time to time, may
amend this Indenture and the Securities to:

       (a) add to the covenants of the Company for the benefit of the Holders of
       Securities;

       (b) surrender any right or power herein conferred upon the Company;

       (c) make provision with respect to the conversion rights of Holders of
       Securities pursuant to Section 12.12;

       (d) provide for the assumption of the Company's obligations to the
       Holders of Securities in the case of a merger, consolidation, conveyance,
       transfer or lease pursuant to Article 6;

       (e) reduce the Conversion Price; provided, however, that such reduction
       in the Conversion Price shall not adversely affect the interest of the
       Holders of Securities (after taking into account tax and other
       consequences of such reduction);

       (f) comply with the requirements of the SEC in order to effect or
       maintain the qualification of this Indenture under the TIA;

       (g) make any changes or modifications to this Indenture necessary in
       connection with the registration of any Securities under the Securities
       Act as contemplated in the Registration Rights Agreement; provided,
       however, that such action pursuant to this clause (g) does not, in the
       good faith opinion of the Board of Directors (as evidenced by a Board
       Resolution) and the Trustee, adversely affect the interests of the
       Holders of Securities in any material respect;

       (h) cure any ambiguity, to correct or supplement any provision herein
       which may be inconsistent with any other provision herein or which is
       otherwise defective, or to make any other provisions with respect to
       matters or questions arising under this Indenture which the

                                       44
<PAGE>   54

       Company and the Trustee may deem necessary or desirable and which shall
       not be inconsistent with the provisions of this Indenture; provided,
       however, that such action pursuant to this clause (h) does not, in the
       good faith opinion of the Board of Directors (as evidenced by a Board
       Resolution) and the Trustee, adversely affect the interests of the
       Holders of Securities in any material respect;

       (i) add or modify any other provisions with respect to matters or
       questions arising under this Indenture which the Company and the Trustee
       may deem necessary or desirable and which shall not be inconsistent with
       the provisions of this Indenture; provided, however, that such action
       pursuant to this clause (i) does not, in the good faith opinion of the
       Board of Directors (as evidenced by a Board Resolution) and the Trustee,
       adversely affect the interests of the Holders of Securities in any
       material respect; or

       (j) make provision for the establishment of a book-entry system, in which
       Holders would have the option to participate, for the clearance and
       settlement of transactions in Securities originally issued in definitive
       form.

Section 7.2  With Consent of Holders of Securities.

Except as provided below in this Section 7.2, this Indenture or the Securities
may be amended or supplemented, and noncompliance in any particular instance
with any provision of this Indenture or the Securities may be waived, in each
case (i) with the written consent of the Holders of at least a majority in
aggregate principal amount of the Outstanding Securities or (ii) by the adoption
of a resolution, at a meeting of Holders of the Outstanding Securities at which
a quorum is present, by the Holders of a majority in aggregate principal amount
of the Outstanding Securities represented at such meeting, delivered to the
Company and all Trustees.

Without the written consent or the affirmative vote of each Holder of Securities
affected thereby, an amendment or waiver under this Section 7.2 may not:

       (a) change the Stated Maturity of the principal of, or any installment of
       interest (including Additional Amounts, if any) on, any Security;

       (b) reduce the principal amount of, or premium, if any, on any Security;

       (c) reduce the Interest Rate or interest (including Additional Amounts,
       if any) on any Security;

       (d) change the currency of payment of principal of, premium, if any, or
       interest (including Additional Amounts, if any) on any Security;

       (e) impair the right of any Holder to institute suit for the enforcement
       of any payment in or with respect to any Security;

       (f) modify the obligation of the Company to maintain an office or agency
       in The City of New York pursuant to Section 9.2;

                                       45
<PAGE>   55

       (g) except as permitted by Section 12.12, adversely affect the Repurchase
       Right or the right to convert any Security as provided in Article 12;

       (h) modify the provisions in Article 13 relating to the subordination of
       the Securities in a manner adverse to the Holders of Securities;

       (i) modify the provisions in Article 10 relating to the redemption of the
       Securities in a manner adverse to the Holders of Securities;

       (j) modify any of the provisions of this Section, Section 4.4 or Section
       14.11, except to increase any percentage contained herein or therein or
       to provide that certain other provisions of this Indenture cannot be
       modified or waived without the consent of the Holder of each Outstanding
       Security affected thereby; or

       (k) reduce the requirements of Section 8.4 for quorum or voting, or
       reduce the percentage in aggregate principal amount of the Outstanding
       Securities the consent of whose Holders is required for any such
       supplemental indenture or the consent of whose Holders is required for
       any waiver provided for in this Indenture.

       It shall not be necessary for any Act of Holders of Securities under this
       Section 7.2 to approve the particular form of any proposal supplemental
       indenture, but it shall be sufficient if such Act shall approve the
       substance thereof.

Section 7.3  Compliance with Trust Indenture Act.

Every amendment to this Indenture or the Securities shall be set forth in a
supplemental indenture that complies with the TIA as then in effect. In
executing or accepting the additional trusts created by any amended or
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 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 7.4  Revocation of Consents and Effect of Consents or Votes.

Until an amendment, supplement or waiver becomes effective, a written consent to
it by a Holder is a continuing consent by the Holder and every subsequent Holder
of a Security or portion of a Security that evidences the same debt as the
consenting Holder's Security, even if notation of the consent is not made on any
Security; provided, however, that unless a record date shall have been
established, any such Holder or subsequent Holder may revoke the consent as to
its Security or portion of a Security if the Trustee receives written notice of
revocation before the date the amendment, supplement or waiver becomes
effective.

An amendment, supplement or waiver becomes effective on receipt by the Trustee
of written consents from or affirmative votes by, as the case may be, the
Holders of the requisite percentage of aggregate

                                       46
<PAGE>   56

principal amount of the Outstanding Securities, and thereafter shall bind every
Holder of Securities; provided, however, if the amendment, supplement or waiver
makes a change described in any of the clauses (a) through (k) of Section 7.2,
the amendment, supplement or waiver shall bind only each Holder of a Security
which has consented to it or voted for it, as the case may be, and every
subsequent Holder of a Security or portion of a Security that evidences the same
indebtedness as the Security of the consenting or affirmatively voting Holder,
as the case may be.

Section 7.5 Notation on or Exchange of Securities.

If an amendment, supplement or waiver changes the terms of a Security:

       (a) the Trustee may require the Holder of a Security to deliver such
       Securities to the Trustee, the Trustee may place an appropriate notation
       on the Security about the changed terms and return it to the Holder and
       the Trustee may place an appropriate notation on any Security thereafter
       authenticated; or

       (b) if the Company or the Trustee so determines, the Company in exchange
       for the Security shall issue and upon receipt of a Company Order the
       Trustee shall authenticate a new Security that reflects the changed
       terms.

       Failure to make the appropriate notation or issue a new Security shall
       not affect the validity and effect of such amendment, supplement or
       waiver.

Section 7.6  Trustee to Sign Amendment, Etc.

The Trustee shall sign any amendment authorized pursuant to this Article 7 if
the amendment does not adversely affect the rights, duties, liabilities or
immunities of the Trustee. If the amendment does adversely affect the rights,
duties, liabilities or immunities of the Trustee, the Trustee may but need not
sign it. In signing or refusing to sign such amendment, the Trustee shall be
entitled to receive and shall be fully protected in relying upon an Officers'
Certificate and an Opinion of Counsel as conclusive evidence that such amendment
is authorized or permitted by this Indenture.

                                    ARTICLE 8

                        MEETING OF HOLDERS OF SECURITIES

Section 8.1  Purposes for Which Meetings May Be Called.

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

Section 8.2  Call Notice and Place of Meetings.

       (a) The Trustee may at any time call a meeting of Holders of Securities
       for any purpose specified in Section 8.1, to be held at such time and at
       such place in The City of New York.

                                       47
<PAGE>   57

       Notice of every meeting of Holders of Securities, setting forth the time
       and the place of such meeting and in general terms the action proposed to
       be taken at such meeting, shall be given, in the manner provided in
       Section 14.2, not less than 21 nor more than 180 days prior to the date
       fixed for the meeting.

       (b) In case at any time the Company, pursuant to a Board Resolution, or
       the Holders of at least 10% in principal amount of the Outstanding
       Securities shall have requested the Trustee to call a meeting of the
       Holders of Securities for any purpose specified in Section 8.1, by
       written request setting forth in reasonable detail the action proposed to
       be taken at the meeting, and the Trustee shall not have made the first
       publication of the notice of such meeting within 21 days after receipt of
       such request or shall not thereafter proceed to cause the meeting to be
       held as provided herein, then the Company or the Holders of Securities in
       the amount specified, as the case may be, may determine the time and the
       place in The City of New York for such meeting and may call such meeting
       for such purposes by giving notice thereof as provided in paragraph (a)
       of this Section 8.2.

Section 8.3  Persons Entitled to Vote at Meetings.

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

Section 8.4  Quorum; Action.

The Persons entitled to vote a majority in principal amount of the Outstanding
Securities shall constitute a quorum. In the absence of a quorum within 30
minutes of the time appointed for any such meeting, the meeting shall, if
convened at the request of Holders of Securities, be dissolved. In any other
case, the meeting may be adjourned for a period of not less than 10 days as
determined by the chairman of the meeting prior to the adjournment of such
meeting. In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting. Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 8.2(a), except that such notice need be given only
once and not less than five days prior to the date on which the meeting is
scheduled to be reconvened. Notice of the reconvening of an adjourned meeting
shall state expressly the percentage of the principal amount of the Outstanding
Securities which shall constitute a quorum.

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

At a meeting or an adjourned meeting duly reconvened and at which a quorum is
present as aforesaid, any resolution and all matters (except as limited by the
proviso to Section 7.2) shall be effectively passed and

                                       48
<PAGE>   58

decided if passed or decided by the Persons entitled to vote not less than a
majority in principal amount of Outstanding Securities represented and voting at
such meeting.

Any resolution passed or decisions taken at any meeting of Holders of Securities
duly held in accordance with this Section shall be binding on all the Holders of
Securities, whether or not present or represented at the meeting.

Section 8.5  Determination of Voting Rights; Conduct and Adjournment of
Meetings.

       (a) Notwithstanding any other provisions of this Indenture, the Trustee
       may make such reasonable regulations as it may deem advisable for any
       meeting of Holders of Securities in regard to proof of the holding of
       Securities and of the appointment of proxies and in regard to the
       appointment and duties of inspectors of votes, the submission and
       examination of proxies, certificates and other evidence of the right to
       vote, and such other matters concerning the conduct of the meeting as it
       shall deem appropriate. Except as otherwise permitted or required by any
       such regulations, the holding of Securities shall be proved in the manner
       specified in Section 8.3 and the appointment of any proxy shall be proved
       in the manner specified in Section 8.3. Such regulations may provide that
       written instruments appointing proxies, regular on their face, may be
       presumed valid and genuine without the proof specified in Section 8.3 or
       other proof.

       (b) The Trustee shall, by an instrument in writing, appoint a temporary
       chairman (which may be the Trustee) of the meeting, unless the meeting
       shall have been called by the Company or by Holders of Securities as
       provided in Section 8.2(b), in which case the Company or the Holders of
       Securities calling the meeting, as the case may be, shall in like manner
       appoint a temporary chairman. A permanent chairman and a permanent
       secretary of the meeting shall be elected by vote of the Persons entitled
       to vote a majority in principal amount of the Outstanding Securities
       represented at the meeting.

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

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

Section 8.6  Counting Votes and Recording Action of Meetings.

The vote upon any resolution submitted to any meeting of Holders of Securities
shall be by written ballots on which shall be subscribed the signatures of the
Holders of Securities or of their representatives by proxy and the principal
amounts and serial numbers of the Outstanding Securities held or represented by
them. The permanent chairman of the meeting shall appoint two inspectors of
votes who shall count all

                                       49
<PAGE>   59

votes cast at the meeting for or against any resolution and who shall make and
file with the secretary of the meeting their verified written reports in
duplicate of all votes cast at the meeting. A record, at least in duplicate, of
the proceedings of each meeting of Holders of Securities shall be prepared by
the secretary of the meeting and there shall be attached to said record the
original reports of the inspectors of votes on any vote by ballot taken thereat
and affidavits by one or more Persons having knowledge of the facts setting
forth a copy of the notice of the meeting and showing that said notice was given
as provided in Section 8.2 and, if applicable, Section 8.4. Each copy shall be
signed and verified by the affidavits of the permanent chairman and secretary of
the meeting and one such copy shall be delivered to the Company and another to
the Trustee to be preserved by the Trustee, the latter to have attached thereto
the ballots voted at the meeting. Any record so signed and verified shall be
conclusive evidence of the matters therein stated.

                                    ARTICLE 9

                                    COVENANTS

Section 9.1  Payment of Principal, Premium and Interest.

The Company will duly and punctually pay the principal of and premium, if any,
and interest (including Additional Amounts, if any) in respect of the Securities
in accordance with the terms of the Securities and this Indenture. The Company
will deposit or cause to be deposited with the Trustee as directed by the
Trustee, no later than the day of the Stated Maturity of any Security or
installment of interest (including Additional Amounts, if any), all payments so
due.

Section 9.2  Maintenance of Offices or Agencies.

The Company hereby appoints the Trustee's Corporate Trust Office as its office
in The City of New York, where Securities may be:

       (i)   presented or surrendered for payment;

       (ii)  surrendered for registration of transfer or exchange;

       (iii) surrendered for conversion;

and where notices and demands to or upon the Company in respect of the
Securities and this Indenture maybe served.

The Company may at any time and from time to time vary or terminate the
appointment of any such office or appoint any additional offices for any or all
of such purposes; provided, however, that until all of the Securities have been
delivered to the Trustee for cancellation, or monies sufficient to pay the
principal of and premium, if any, and interest (including Additional Amounts, if
any) on the Securities have been made available for payment and either paid or
returned to the Company pursuant to the provisions of Section 9.3, the Company
will maintain in the City of New York, an office or agency where Securities may
be presented or surrendered for payment, where Securities may be surrendered for
registration of transfer or exchange, where Securities may be surrendered for
conversion and where notices and demands

                                       50
<PAGE>   60

to or upon the Company in respect of the Securities and this Indenture may be
served. The Company will give prompt written notice to the Trustee, and notice
to the Holders in accordance with Section 14.2, of the appointment or
termination of any such agents and of the location and any change in the
location of any such office or agency.

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

Section 9.3  Corporate Existence.

Subject to Article 6, the Company will do or cause to be done all things
necessary to preserve and keep in full force and effect its corporate existence,
rights (charter and statutory) and franchises; provided, however, that the
Company shall not be required to preserve any such right or franchise if the
Company determines that the preservation thereof is no longer desirable in the
conduct of the business of the Company and that the loss thereof is not
disadvantageous in any material respect to the Holders.

Section 9.4  Maintenance of Properties.

The Company will maintain and keep its properties and every part thereof in such
repair, working order and condition, and make or cause to be made all such
needful and proper repairs, renewals and replacements thereto, as in the
judgment of the Company are necessary in the interests of the Company; provided,
however, that nothing contained in this Section shall prevent the Company from
selling, abandoning or otherwise disposing of any of its properties or
discontinuing a part of its business from time to time if, in the judgment of
the Company, such sale, abandonment, disposition or discontinuance is advisable
and does not materially adversely affect the interests or business of the
Company.

Section 9.5  Payment of Taxes and Other Claims.

The Company will, and will cause any Significant Subsidiary to, promptly pay and
discharge or cause to be paid and discharged all material taxes, assessments and
governmental charges or levies lawfully imposed upon it or upon its income or
profits or upon any of its property, real or personal, or upon any part thereof,
as well as all material claims for labor, materials and supplies which, if
unpaid, might by law become a lien or charge upon its property; provided,
however, that neither the Company nor any Significant Subsidiary shall be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge, levy, or claim if the amount, applicability or validity
thereof shall currently be contested in good faith by appropriate proceedings
and if the Company or such Significant Subsidiary, as the case may be, shall
have set aside on its books reserves deemed by it adequate with respect thereto.

Section 9.6  Reports.

       (a) The Company shall deliver to the Trustee within 15 days after it
       files them with the SEC copies of the annual reports and of the
       information, documents, and other reports (or copies of such portions of
       any of the foregoing as the SEC may by rules and regulations prescribe)
       which the Company is required to file with the SEC pursuant to Section 13
       or 15(d) of the

                                       51
<PAGE>   61

       Exchange Act; provided, however, the Company shall not be required to
       deliver to the Trustee any materials for which the Company has sought and
       received confidential treatment by the SEC. The Company also shall comply
       with the other provisions of Section 314(a) of the TIA.

       (b) If at any time the Company is not subject to Section 13 or 15(d) of
       the Exchange Act, upon the request of a Holder of a Security, the Company
       will promptly furnish or cause to be furnished to such Holder or to a
       prospective purchaser of such Security designated by such Holder, as the
       case may be, the information, if any, required to be delivered by it
       pursuant to Rule 144A(d)(4) under the Securities Act to permit compliance
       with Rule 144A in connection with the resale of such Security; provided,
       however, that the Company shall not be required to furnish such
       information in connection with any request made on or after the date
       which is two years from the later of the date such security was last
       acquired from the Company or an "affiliate" (as defined under Rule 144
       under the Securities Act) of the Company.

Section 9.7  Compliance Certificate.

The Company shall deliver to the Trustee, within 120 days after the end of each
fiscal year of the Company (which as of the date hereof is December 31), an
Officers' Certificate stating that in the course of the performance by the
signers of their duties as Officers of the Company, they would normally have
knowledge of any failure by the Company to comply with all conditions, or any
Default by the Company with respect to any covenants, under this Indenture, and
further stating whether or not they have knowledge of any such failure or
Default and, if so, specifying each such failure or Default and the nature
thereof. In the event an Officer of the Company comes to have actual knowledge
of a Default, regardless of the date, the Company shall deliver an Officers'
Certificate to the Trustee specifying such Default and the nature and status
thereof.

Section 9.8  Resale of Certain Securities.

During the period of two years after the last date of original issuance of any
Securities, the Company shall not, and shall not permit any of its "affiliates"
(as defined under Rule 144 under the Securities Act) to, resell any Securities,
or shares of Common Stock issuable upon conversion of the Securities, which
constitute "restricted securities" under Rule 144, that are acquired by any of
them within the United States except pursuant to an effective registration
statement under the Securities Act or an applicable exemption therefrom. The
Trustee shall have no responsibility or liability in respect of the Company's
performance of its agreement in the preceding sentence.

                                   ARTICLE 10

                            REDEMPTION OF SECURITIES

Section 10.1 Provisional Redemption

                                       52
<PAGE>   62

       (a) The Company may, at its option, redeem the Securities in whole at any
       time or in part from time to time, on any date prior to October 1, 2003,
       upon notice as set forth in Section 10.5, at a Redemption Price
       (expressed as a percentage of the principal amount) equal to 103% of the
       principal amount of the Securities called for such redemption, plus
       accrued and unpaid interest to, but excluding, the Redemption Date
       specified in the notice in accordance with Section 10.5, if:

              (1) the Shelf Registration Statement is effective and available
              for use and is expected to remain effective and available for use
              for the 30 days following such Redemption Date; and

              (2) the average of the high and low sale prices of the Company's
              Common Stock on any Trading Day (the "Current Market Value")
              equals or exceeds, for at least 20 Trading Days in any period of
              30 consecutive Trading Days (ending on the Trading Day prior to
              the date the notice of redemption is mailed), the following
              percentages of the Conversion Price then in effect (the "Trigger
              Percentage") during the 12-month period beginning October 1 of the
              years indicated:

<TABLE>
<CAPTION>
                                            Trigger Percentage
                                            ------------------
<S>                                         <C>
                    October 1, 2000                200%

                    October 1, 2001                175%

                    October 1, 2002                150%
</TABLE>

       (b) In addition to the Redemption Price, the Company shall pay, with
       respect to any Securities called for redemption under this Section 10.1,
       an additional payment (the "Interest Make-Whole Payment") equal to the
       sum of:

              (1) the Present Value of the aggregate amount of interest that
              would otherwise have accrued from the Redemption Date through
              October 1, 2003 (the "Interest Make-Whole Period"); and

              (2) unpaid Additional Amounts on the Securities called for
              redemption, if any.

       "Present Value" shall be calculated by using the bond equivalent yield on
       U.S. Government Obligations having a term nearest in length to that of
       the Interest Make-Whole Period, as of the date of the notice of
       redemption. The Interest Make-Whole Payment shall be payable on all
       Securities called for redemption, including those Securities which are
       converted into Common Stock after the date of the notice of redemption
       but prior to the Redemption Date.

       (c) Subject to the fulfillment by the Company of the conditions set forth
       in Section 11.2, the Company may elect to pay the Redemption Price and/or
       the Interest Make-Whole Payment by delivering a number of shares of
       Common Stock equal to (i) the Redemption Price and/or the Interest
       Make-Whole Payment, as appropriate, divided by (ii) the average of the
       Trading

                                       53
<PAGE>   63

       Prices per share of Common Stock for the five consecutive Trading Days
       immediately preceding and including the third Trading Day prior to the
       Redemption Date.

       (d) Any issuance of shares of Common Stock in respect of the Interest
       Make-Whole Payment shall be deemed to have been effected immediately
       prior to the close of business on the Redemption Date and the Person or
       Persons in whose name or names any stock certificate or stock
       certificates representing shares of Common Stock shall be issuable upon
       such redemption shall be deemed to have become on the Redemption Date the
       holder or holders of record of the shares represented thereby; provided,
       however, that any surrender for redemption on a date when the stock
       transfer books of the Company shall be closed shall constitute the Person
       or Persons in whose name or names the stock certificate or stock
       certificates representing such shares are to be issued as the holder or
       holders of record of the shares represented thereby for all purposes at
       the opening of business on the next succeeding day on which such stock
       transfer books are open. No payment or adjustment shall be made for
       dividends or distributions on any Common Stock declared prior to the
       Redemption Date.

       (e) No fractions of shares of Common Stock shall be issued upon payment
       of the Interest Make-Whole Payment. Instead of any fractional share of
       Common Stock which would otherwise be issued, the Company shall pay a
       cash adjustment in respect of such fraction (calculated to the nearest
       one-100th of a share) in an amount equal to the same fraction of the
       Trading Price of the Common Stock as of the Trading Day preceding the
       Redemption Date.

       (f) Any issuance and delivery of stock certificates representing shares
       of Common Stock on payment of the Interest Make-Whole Payment shall be
       made without charge to the Holder of Securities being redeemed or for any
       tax or duty in respect of the issuance or delivery of such stock
       certificates or the Securities represented thereby; provided, however,
       that the Company shall not be required to pay any tax or duty which may
       be payable in respect of (i) income of the Holder or (ii) any transfer
       involved in the issuance or delivery of stock certificates representing
       shares of Common Stock in a name other than that of the Holder of the
       Securities being redeemed, and no such issuance or delivery shall be made
       unless the Persons requesting such issuance or delivery has paid to the
       Company the amount of any such tax or duty or has established, to the
       satisfaction of the Company, that such tax or duty has been paid.

Section 10.2 Non-provisional Redemption.

On or after October 1, 2003, the Company may, at its option, redeem the
Securities in whole at any time or in part from time to time, on any date prior
to maturity, upon notice as set forth in Section 10.5, at the Redemption Price
(expressed as percentages of the principal amount) set forth below if redeemed
on a Redemption Date occurring during the 12-month period beginning October 1 of
the years indicated:

<TABLE>
<CAPTION>
                                                  Redemption Price
                                                  ----------------
<S>                                               <C>
 October 1, 2003                                      102.0000%

 October 1, 2004                                      101.0000%
</TABLE>

                                       54
<PAGE>   64

Section 10.3 Notice to Trustee.

If the Company elects to redeem Securities pursuant to the provisions of Section
10.1 or 10.2, it shall notify the Trustee at least 60 days prior to the intended
Redemption Date of (i) such intended Redemption Date, (ii) the principal amount
of Securities to be redeemed and (iii) the CUSIP numbers of the Securities to be
redeemed.

Section 10.4 Selection of Securities to Be Redeemed.

If fewer than all the Securities are to be redeemed, the Trustee shall select
the particular Securities to be redeemed from the Outstanding Securities by a
method that complies with the requirements of any exchange on which the
Securities are listed, or, if the Securities are not listed on an exchange, on a
pro rata basis or by lot or in accordance with any other method the Trustee
considers fair and appropriate. Securities and portions thereof that the Trustee
selects shall be in amounts equal to the minimum authorized denominations for
Securities to be redeemed or any integral multiple thereof.

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 to be the
portion selected for redemption; provided, however, that the Holder of such
Security so converted and deemed redeemed shall not be entitled to any
additional interest payment as a result of such deemed redemption than such
Holder would have otherwise been entitled to receive upon conversion of such
Security. Securities which have been converted during a selection of Securities
to be redeemed may be treated by the Trustee as Outstanding for the purpose of
such selection.

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

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

Section 10.5 Notice of Redemption.

Notice of redemption shall be given in the manner provided in Section 14.2 to
the Holders of Securities to be redeemed. Such notice shall be given not less
than 20 nor more than 60 days prior to the intended Redemption Date.

All notices of redemption shall state:

       (1)    such intended Redemption Date;

       (2)    the Redemption Price and interest (including Additional Amounts,
       if any) accrued and unpaid to, but excluding, the Redemption Date, if
       any;

       (3)    the Interest Make-Whole Payment, if any;

                                       55
<PAGE>   65

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

       (5)    that on the Redemption Date the Redemption Price, the Interest
       Make-Whole Payment, if any, and interest accrued and unpaid to, but
       excluding, the Redemption Date, if any, will become due and payable upon
       each such Security to be redeemed, and that interest (including
       Additional Amounts, if any) thereon shall cease to accrue on and after
       such date;

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

       (7)    the place or places where such Securities are to be surrendered
       for payment of the Redemption Price, accrued and unpaid interest, if any,
       and Interest Make-Whole Payment, if any;

       (8)    whether the Interest Make-Whole Payment is to be paid in shares of
       Common Stock, and if so, that the Holder shall provide the name or names
       (with addresses) in which the stock certificate or stock certificates
       representing shares of Common Stock are to be issued upon surrender of
       the Securities; and

       (9)    the CUSIP number of the Securities.

       The notice given shall specify the last date on which exchanges or
       transfers of Securities may be made pursuant to Section 2.7, and shall
       specify the serial numbers of Securities and the portions thereof called
       for redemption.

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

Section 10.6 Effect of Notice of Redemption.

Notice of redemption having been given as provided in Section 10.5, the
Securities so to be redeemed shall, on the Redemption Date, become due and
payable at the Redemption Price therein specified and from and after such date
(unless the Company shall default in the payment of the Redemption Price and
accrued and unpaid interest) such Securities shall cease to bear interest. Upon
surrender of any such Security for redemption in accordance with such notice,
such Security shall be paid by the Company at the Redemption Price; provided,
however, the installments of interest on Securities whose Stated Maturity is
prior to or on the Redemption Date shall be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such on the
relevant Record Date according to their terms and the provisions of Section 2.7.

                                       56
<PAGE>   66

If any Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal and premium, if any, shall, until paid,
bear interest from the Redemption Date at the Interest Rate.

Section 10.7 Deposit of Redemption Price.

Not less than one (1) day prior to any Redemption Date, the Company shall
deposit with the Trustee or with a Paying Agent an amount of money sufficient to
pay the Redemption Price, accrued and unpaid interest (including Additional
Amounts, if any), and Interest Make-Whole Payment, if any, in respect of all the
Securities to be redeemed on that Redemption Date, other than any Securities
called for redemption on that date which have been converted prior to the date
of such deposit, and accrued and unpaid interest, if any, on such Securities.

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 any right of the Holder of such
Security or any Predecessor Security to receive interest as provided in the
fourth to last paragraph of Section 2.1) be paid to the Company on Company
Request or, if then held by the Company, shall be discharged from such trust.

Section 10.8 Securities Redeemed in Part.

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

                                   ARTICLE 11

          REPURCHASE AT THE OPTION OF A HOLDER UPON A CHANGE OF CONTROL

Section 11.1 Repurchase Right.

In the event that a Change in Control shall occur, each Holder shall have the
right (the "Repurchase Right"), at the Holder's option, but subject to the
provisions of Section 11.2, to require the Company to repurchase, and upon the
exercise of such right the Company shall repurchase, all of such Holder's
Securities not theretofore called for redemption, or any portion of the
principal amount thereof that is equal to any integral multiple of $1,000
(provided that no single Security may be repurchased in part unless the portion
of the principal amount of such Security to be Outstanding after such repurchase
is equal to an integral multiple of $1,000), on the date (the "Repurchase Date")
that is 45 days after the date of the Company Notice given pursuant to Section
11.3 in connection with such Change of Control at a purchase price equal to the
principal amount of the Securities to be repurchased (the "Repurchase Price"),
plus interest (including Additional Amounts, if any) accrued and unpaid to, but
excluding, the Repurchase

                                       57
<PAGE>   67

Date; provided, however, that installments of interest on Securities whose
Stated Maturity is prior to or on the Repurchase Date shall be payable to the
Holders of such Securities, or one or more Predecessor Securities, registered as
such on the relevant Record Date according to their terms and the provisions of
Section 2.1.

Subject to the fulfillment by the Company of the conditions set forth in Section
11.2, the Company may elect to pay the Repurchase Price by delivering a number
of shares of Common Stock equal to (i) the Repurchase Price divided by (ii) 95%
of the average of the Trading Prices per share of Common Stock for the five
consecutive Trading Days immediately preceding and including the third Trading
Day prior to the Repurchase Date.

Whenever in this Indenture (including Sections 2.2, 4.1(a) and 4.7) or Exhibit A
annexed hereto there is a reference, in any context, to the principal of any
Security as of any time, such reference shall be deemed to include reference to
the Repurchase Price payable in respect to such Security to the extent that such
Repurchase Price is, was or would be so payable at such time, and express
mention of the Repurchase Price in any provision of this Indenture shall not be
construed as excluding the Repurchase Price in those provisions of this
Indenture when such express mention is not made; provided, however, that, for
the purposes of Article 13, such reference shall be deemed to include reference
to the Repurchase Price only to the extent the Repurchase Price is payable in
cash.

Section 11.2 Conditions to the Company's Election to Pay the Repurchase Price or
an Interest Make-Whole Payment in Common Stock.

The Company may, at its option, pay the Repurchase Price payable to Holders
pursuant to Section 11.1 or the Interest Make-Whole Payment payable to Holders
pursuant to Section 10.1(b) upon redemption of the Securities, in shares of
Common Stock, if the following conditions are satisfied:

       (a)    The shares of Common Stock to be so issued:

              (i)    shall not require registration under any federal securities
              law before such shares may be freely transferable without being
              subject to any transfer restrictions under the Securities Act upon
              repurchase or redemption, as the case may be, or if such
              registration is required, such registration shall be completed and
              shall become effective prior to the Repurchase Date or the
              Redemption Date, as the case may be; and

              (ii)   shall not require registration with, or approval of, any
              governmental authority under any state law or any other federal
              law before shares may be validly issued or delivered upon
              repurchase or redemption or if such registration is required or
              such approval must be obtained, such registration shall be
              completed or such approval shall be obtained prior to the
              Repurchase Date or Redemption Date, as the case may be.

       (b)    The shares of Common Stock to be listed upon repurchase or
       redemption of Securities hereunder are, or shall have been, approved for
       listing on the Nasdaq National Market or the New York Stock Exchange or
       listed on another national securities exchange, in any case, prior to the
       Repurchase Date or the Redemption Date, as the case may be.

                                       58
<PAGE>   68

       (c)    All shares of Common Stock which may be issued upon repurchase or
       redemption of Securities will be issued out of the Company's authorized
       but unissued Common Stock and will, upon issue, be duly and validly
       issued and fully paid and nonassessable and free of any preemptive or
       similar rights.

       (d)    If any of the conditions set forth in clauses (a) through (c) of
       this Section 11.2 are not satisfied in accordance with the terms thereof,
       the Repurchase Price or the Interest Make-Whole Payment, as applicable,
       shall be paid by the Company only in cash.

Section 11.3 Notices; Method of Exercising Repurchase Right, Etc.

       (a)    Unless the Company shall have theretofore called for redemption of
       all of the Outstanding Securities, prior to or on the 30th day after the
       occurrence of a Change in Control, the Company, or, at the written
       request and expense of the Company prior to or on the 30th day after such
       occurrence, the Trustee, shall give to all Holders of Securities notice,
       in the manner provided in Section 14.2, of the occurrence of the Change
       of Control and of the Repurchase Right set forth herein arising as a
       result thereof (the "Company Notice"). The Company shall also deliver a
       copy of such notice of a Repurchase Right to the Trustee. Each notice of
       a Repurchase Right shall state:

              (1)    the Repurchase Date;

              (2)    the date by which the Repurchase Right must exercised;

              (3)    the Repurchase Price and accrued and unpaid interest
              (including Additional Amounts, if any), if any;

              (4)    whether the Repurchase Price shall be paid by the Company
              in cash or by delivery of shares of Common Stock;

              (5)    a description of the procedure which a Holder must follow
              to exercise its Repurchase Right, and the place or places where
              such Securities, are to be surrendered for payment of the
              Repurchase Price and accrued and unpaid interest, if any;

              (6)    that on the Repurchase Date the Repurchase Price and
              accrued and unpaid interest, if any, will become due and payable
              in cash upon each such Security designated by the Holder to be
              repurchased, and that interest thereon shall cease to accrue on
              and after said date;

              (7)    the Conversion Price then in effect, the date on which the
              right to convert the principal amount of the Securities to be
              repurchased will terminate and the place where such Securities may
              be surrendered for conversion, and

              (8)    the place or places where such Securities, together with
              the Option to Elect Repayment Upon a Change of Control certificate
              included in Exhibit A annexed hereto are to be delivered for
              payment of the Repurchase Price and accrued and unpaid interest,
              if any.

                                       59
<PAGE>   69

              No failure of the Company to give the foregoing notices or defect
              therein shall limit any Holder's right to exercise a Repurchase
              Right or affect the validity of the proceedings for the repurchase
              of Securities.

If any of the foregoing provisions or other provisions of this Article 11 are
inconsistent with applicable law, such law shall govern.

       (b)    To exercise its Repurchase Right, a Holder shall deliver to the
       Trustee prior to or on the 30th day after the date of the Company Notice:

              (1)    written notice of the Holder's exercise of such right,
              which notice shall set forth the name of the Holder, the principal
              amount of the Securities to be repurchased (and, if any Security
              is to be repurchased in part, the serial number thereof, the
              portion of the principal amount thereof to be repurchased) and a
              statement that an election to exercise the Repurchase Right is
              being made thereby, and, in the event that the Repurchase Price
              shall be paid in shares of Common Stock, the name or names (with
              addresses) in which the certificate or certificates for shares of
              Common Stock shall be issued; and

              (2)    the Securities with respect to which the Repurchase Right
              is being exercised.

       Such written notice shall be irrevocable, except that the right of the
Holder to convert the Securities with respect to which the Repurchase Right is
being exercised shall continue until the close of business on the Business Day
immediately preceding the Repurchase Date; provided that the Holder delivers to
the Paying Agent a notice of withdrawal prior to the Business Day immediately
preceding the Repurchase Date.

       (c)    In the event a Repurchase Right shall be exercised in accordance
       with the terms hereof, the Company shall pay or cause to be paid to the
       Trustee the Repurchase Price in cash or shares of Common Stock, as
       provided above, for payment to the Holder on the Repurchase Date or, if
       shares of Common Stock are to be paid, as promptly after the Repurchase
       Date as practicable, together with accrued and unpaid interest to, but
       excluding, the Repurchase Date payable in cash with respect to the
       Securities as to which the Repurchase Right has been exercised; provided,
       however, that installments of interest that mature prior to or on the
       Repurchase Date shall be payable in cash to the Holders of such
       Securities, or one or more Predecessor Securities, registered as such at
       the close of business on the relevant Regular Record Date.

       (d)    If any Security (or portion thereof) surrendered for repurchase
       shall not be so paid on the Repurchase Date, the principal amount of such
       Security (or portion thereof, as the case may be) shall, until paid, bear
       interest to the extent permitted by applicable law from the Repurchase
       Date at the Interest Rate, and each Security shall remain convertible
       into Common Stock until the principal of such Security (or portion
       thereof, as the case may be) shall have been paid or duly provided for.

       (e)    Any Security which is to be repurchased only in part shall be
       surrendered to the Trustee (with, if the Company or the Trustee so
       requires, due endorsement by, or a written instrument

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<PAGE>   70

       of transfer in form satisfactory to the Company and the Trustee duly
       executed by the Holder thereof or his attorney duly authorized in
       writing), and the Company shall execute, and upon receipt of a Company
       Order the Trustee shall authenticate and make available for delivery to
       the Holder of such Security without service charge, a new Security or
       Securities, containing identical terms and conditions, each in an
       authorized denomination in aggregate principal amount equal to and in
       exchange for the unrepurchased portion of the principal of the Security
       so surrendered.

       (f)    Any issuance of shares of Common Stock in respect of the
       Repurchase Price shall be deemed to have been effected immediately prior
       to the close of business on the Repurchase Date and the Person or Persons
       in whose name or names any stock certificate or stock certificates
       representing shares of Common Stock shall be issuable upon such
       repurchase shall be deemed to have become on the Repurchase Date the
       holder or holders of record of the shares represented thereby; provided,
       however, that any surrender for repurchase on a date when the stock
       transfer books of the Company shall be closed shall constitute the Person
       or Persons in whose name or names the stock certificate or stock
       certificates representing such shares are to be issued as the holder or
       holders of record of the shares represented thereby for all purposes at
       the opening of business on the next succeeding day on which such stock
       transfer books are open. No payment or adjustment shall be made for
       dividends or distributions on any Common Stock issued upon repurchase of
       any Security declared prior to the Repurchase Date.

       (g)    No fractions of shares of Common Stock shall be issued upon
       repurchase of any Security or Securities. If more than one Security shall
       be repurchased from the same Holder and the Repurchase Price shall be
       payable in shares of Common Stock, the number of full shares which shall
       be issued upon such repurchase shall be computed on the basis of the
       aggregate principal amount of the Securities (or specified portions
       thereof) to be so repurchased. Instead of any fractional share of Common
       Stock which would otherwise be issued on the repurchase of any Security
       or Securities (or specified portions thereof), the Company shall pay a
       cash adjustment in respect of such fraction (calculated to the nearest
       one-100th of a share) in an amount equal to the same fraction of the
       Trading Price of the Common Stock as of the Trading Day preceding the
       Repurchase Date.

       (h)    Any issuance and delivery of stock certificates representing
       shares of Common Stock on repurchase of Securities shall be made without
       charge to the Holder of Securities being repurchased for such stock
       certificates or for any tax or duty in respect of the issuance or
       delivery of such stock certificates or the Securities represented
       thereby; provided, however, that neither the Company nor the Trustee in
       any of capacities hereunder shall be required to pay any tax or duty
       which may be payable in respect of (i) income of the Holder or (ii) any
       transfer involved in the issuance or delivery of stock certificates
       representing shares of Common Stock in a name other than that of the
       Holder of the Securities being repurchased, and no such issuance or
       delivery shall be made unless the Person requesting such issuance or
       delivery has paid to the Company or the Trustee, as the case may be, the
       amount of any such tax or duty or has established, to the satisfaction of
       the Company or the Trustee, that such tax or duty has been paid.

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<PAGE>   71

       (i)    All Securities delivered for repurchase shall be delivered to the
       Trustee to be canceled at the direction of the Trustee, which shall
       dispose of the same as provided in Section 2.15.

                                   ARTICLE 12

                            CONVERSION OF SECURITIES

Section 12.1 Conversion Right and Conversion Price.

Subject to and upon compliance with the provisions of this Article, at the
option of the Holder thereof or pursuant to Section 10.1(c), any Security or any
portion of the principal amount thereof which is an integral multiple of $1,000
may be converted at the principal amount thereof, or of such portion thereof,
into duly authorized, fully paid and nonassessable shares of Common Stock, at
the Conversion Price, determined as hereinafter provided, in effect at the time
of conversion. Such conversion right shall expire at the close of business on
the Business Day immediately preceding September 30, 2005.

In case a Security or portion thereof is called for redemption, such conversion
right in respect of the Security or the portion so called, shall expire at the
close of business on the second Business Day preceding the Redemption Date,
unless the Company defaults in making the payment due upon redemption. In the
case of a Change of Control for which the Holder has exercised its Repurchase
Right with respect to a Security or portion thereof, the Holder may exercise its
conversion right with respect to the Security or portion thereof only if the
Holder withdraws its notice and exercises its conversion rights prior to the
Business Day immediately preceding the Repurchase Date.

The price at which shares of Common Stock shall be delivered upon conversion
(the "Conversion Price") shall be initially equal to $4.75 per share of Common
Stock. The Conversion Price shall be adjusted in certain instances as provided
in paragraphs (a), (b), (c), (d), (e), (f), (h) and (1) of Section 12.4.

Section 12.2 Exercise of Conversion Right.

To exercise the conversion right, the Holder of any Security to be converted
shall surrender such Security duly endorsed or assigned to the Company or in
blank, at the office of any Conversion Agent, accompanied by a duly signed
conversion notice substantially in the form attached to the Security to the
Company, the Conversion Agent and Trustee stating that the Holder elects to
convert such Security or, if less than the entire principal amount thereof is to
be converted, the portion thereof to be converted. The Company shall provide
written instructions signed by an officer of the Company to the Conversion Agent
and the Trustee as to how such Security shall be converted in accordance with
this Article 12.

Securities surrendered for conversion 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 (except in the case of any Security whose
Maturity is prior to such Interest Payment Date) shall be accompanied by payment
in immediately available funds of an amount equal to the interest to be received
on such Interest Payment Date on the principal amount of Securities being
surrendered for conversion.

Securities shall be deemed to have been converted immediately prior to the close
of business on the day of surrender of such Securities for conversion in
accordance with the foregoing provisions, and at such

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<PAGE>   72

time the rights of the Holders of such Securities as Holders shall cease, and
the Person or Persons entitled to receive the Common Stock issuable upon
conversion shall be treated for all purposes as the record holder or holders of
such Common Stock at such time. As promptly as practicable on or after the
conversion date, the Company shall cause to be issued and delivered to such
Conversion Agent a stock certificate or stock certificates representing the
number of full shares of Common Stock issuable upon conversion of such
Securities, together with payment in lieu of any fraction of a share as provided
in Section 12.3.

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

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

The Company hereby initially appoints the Trustee as the Conversion Agent.

Section 12.3 Fractions of Shares.

No fractional shares of Common Stock shall be issued upon conversion of any
Security or Securities. If more than one Security shall be surrendered for
conversion at one time by the same Holder, the number of full shares which shall
be issued upon conversion thereof shall be computed on the basis of the
aggregate principal amount of the Securities (or specified portions thereof) so
surrendered. Instead of any fractional share of Common Stock which would
otherwise be issued upon conversion of any Security or Securities (or specified
portions thereof), the Company shall pay a cash adjustment in respect of such
fraction (calculated to the nearest one-100th of a share) in an amount equal to
the same fraction of the Trading Price of the Common Stock as of the Trading Day
preceding the date of conversion.

Section 12.4 Adjustment of Conversion Price.

The Conversion Price, the Maximum Annual Adjusted Conversion Price (defined
below) and the Minimum Annual Adjusted Conversion Price (defined below) (each a
"Relevant Price"), shall be subject to adjustment, calculated by the Company,
from time to time as follows:

       (a)    In case the Company shall hereafter pay a dividend or make a
       distribution to all holders of the outstanding Common Stock in shares of
       Common Stock, the Relevant Price in effect at the opening of business on
       the date following the date fixed for the determination of stockholders

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<PAGE>   73

       entitled to receive such dividend or other distribution shall be reduced
       by multiplying such Relevant Price by a fraction:

              (i)    the numerator of which shall be the number of shares of
              Common Stock outstanding at the close of business on the Record
              Date (as defined in Section 12.4(g)) fixed for such determination;
              and

              (ii)   the denominator of which shall be the sum of such number of
              shares and the total number of shares constituting such dividend
              or other distribution.

       Such reduction shall become effective immediately after the opening of
       business on the day following the Record Date. If any dividend or
       distribution of the type described in this Section 12.4(a) is declared
       but not so paid or made, the Relevant Price shall again be adjusted to
       the Relevant Price which would then be in effect if such dividend or
       distribution had not been declared.

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

       (c)    In case the Company shall issue rights or warrants (other than any
       rights or warrants referred to in Section 12.4(d)) to all holders of its
       outstanding shares of Common Stock entitling them to subscribe for or
       purchase shares of Common Stock (or securities convertible into Common
       Stock) at a price per share (or having a conversion price per share) less
       than the Current Market Price (as defined in Section 12.4(g)) on the
       Record Date fixed for the determination of stockholders entitled to
       receive such rights or warrants, the Relevant Price shall be adjusted so
       that the same shall equal the price determined by multiplying the
       Relevant Price in effect at the opening of business on the date after
       such Record Date by a fraction:

              (i)    the numerator of which shall be the number of shares of
              Common Stock outstanding at the close of business on the Record
              Date, plus the number of shares which the aggregate offering price
              of the total number of shares so offered for subscription or
              purchase (or the aggregate conversion price of the convertible
              securities so offered) would purchase at such Current Market
              Price; and

              (ii)   the denominator of which shall be the number of shares of
              Common Stock outstanding on the close of business on the Record
              Date, plus the total number of additional shares of Common Stock
              so offered for subscription or purchase (or into which the
              convertible securities so offered are convertible).

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<PAGE>   74

       Such adjustment shall become effective immediately after the opening of
       business on the day following the Record Date fixed for determination of
       stockholders entitled to receive such rights or warrants. To the extent
       that shares of Common Stock (or securities convertible into Common Stock)
       are not delivered pursuant to such rights or warrants, upon the
       expiration or termination of such rights or warrants, the Relevant Price
       shall be readjusted to the Relevant Price which would then be in effect
       had the adjustments made upon the issuance of such rights or warrants
       been made on the basis of the delivery of only the number of shares of
       Common Stock (or securities convertible into Common Stock) actually
       delivered. In the event that such rights or warrants are not so issued,
       the Relevant Price shall again be adjusted to be the Relevant Price which
       would then be in effect if such date fixed for the determination of
       stockholders entitled to receive such rights or warrants had not been
       fixed. In determining whether any rights or warrants entitle the holders
       to subscribe for or purchase shares of Common Stock at less than such
       Current Market Price, and in determining the aggregate offering price of
       such shares of Common Stock, there shall be taken into account any
       consideration received for such rights or warrants, the value of such
       consideration if other than cash, to be determined by the Board of
       Directors.

       (d)    In case the Company shall, by dividend or otherwise, distribute to
       all holders of its Common Stock shares of any class of capital stock of
       the Company (other than any dividends or distributions to which Section
       12.4(a) applies) or evidences of its indebtedness, cash or other assets,
       including securities, but excluding (1) any rights or warrants referred
       to in Section 12.4(c), (2) any stock, securities or other property or
       assets (including cash) distributed in connection with a
       reclassification, change, merger, consolidation, statutory share
       exchange, combination, sale or conveyance to which Section 12.12 applies
       and (3) dividends and distributions paid exclusively in cash (the
       securities described in foregoing clauses (1), (2) and (3) hereinafter in
       this Section 12.4(d) called the "securities"), then, in each such case,
       subject to the second succeeding paragraph of this Section 12.4(d), the
       Relevant Price shall be reduced so that the same shall be equal to the
       price determined by multiplying the Relevant Price in effect immediately
       prior to the close of business on the Record Date (as defined in Section
       12.4(g)) with respect to such distribution by a fraction:

              (i)    the numerator of which shall be the Current Market Price
              (determined as provided in Section 12.4(g)) on such date, less the
              fair market value (as determined by the Board of Directors, whose
              determination shall be conclusive and set forth in a Board
              Resolution) on such date of the portion of the securities so
              distributed applicable to one share of Common Stock (determined on
              the basis of the number of shares of the Common Stock outstanding
              on the Record Date); and

              (ii)   the denominator of which shall be such Current Market
              Price.

       Such reduction shall become effective immediately prior to the opening of
       business on the day following the Record Date. However, in the event that
       the then fair market value (as so determined) of the portion of the
       securities so distributed applicable to one share of Common Stock is
       equal to or greater than the Current Market Price on the Record Date, in
       lieu of the foregoing adjustment, adequate provision shall be made so
       that each Holder shall have the right to receive upon conversion of a
       Security (or any portion thereof) the amount of

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<PAGE>   75

       securities such Holder would have received had such Holder converted such
       Security (or portion thereof) immediately prior to such Record Date. In
       the event that such dividend or distribution is not so paid or made, the
       Relevant Price shall again be adjusted to be the Relevant Price which
       would then be in effect if such dividend or distribution had not been
       declared.

       If the Board of Directors determines the fair market value of any
       distribution for purposes of this Section 12.4(d) by reference to the
       actual or when issued trading market for any securities comprising all or
       part of such distribution, it must in doing so consider the prices in
       such market over the same period (the "Reference Period") used in
       computing the Current Market Price pursuant to Section 12.4(g) to the
       extent possible, unless the Board of Directors in a Board Resolution
       determines in good faith that determining the fair market value during
       the Reference Period would not be in the best interest of the Holders.

       Rights or warrants distributed by the Company to all holders of Common
       Stock entitling the holders thereof to subscribe for or purchase shares
       of the Company's capital stock (either initially or under certain
       circumstances), which rights or warrants, until the occurrence of a
       specified event or events ("Trigger Event"):

              (i)    are deemed to be transferred with such shares of Common
              Stock;

              (ii)   are not exercisable; and

              (iii)  are also issued in respect of future issuances of Common
              Stock;

              shall be deemed not to have been distributed for purposes of this
              Section 12.4(d) (and no adjustment to the Relevant Price under
              this Section 12.4(d) will be required) until the occurrence of the
              earliest Trigger Event. If such right or warrant is subject to
              subsequent events, upon the occurrence of which such right or
              warrant shall become exercisable to purchase different securities,
              evidences of indebtedness or other assets or entitle the holder to
              purchase a different number or amount of the foregoing or to
              purchase any of the foregoing at a different purchase price, then
              the occurrence of each such event shall be deemed to be the date
              of issuance and record date with respect to a new right or warrant
              (and a termination or expiration of the existing right or warrant
              without exercise by the holder thereof). In addition, in the event
              of any distribution (or deemed distribution) of rights or
              warrants, or any Trigger Event or other event (of the type
              described in the preceding sentence) with respect thereto, that
              resulted in an adjustment to the Relevant Price under this Section
              12.4(d):

                     (1)    in the case of any such rights or warrants which
                     shall all have been redeemed or repurchased without
                     exercise by any holders thereof, the Relevant Price shall
                     be readjusted upon such final redemption or repurchase to
                     give effect to such distribution or Trigger Event, as the
                     case may be, as though it were a cash distribution, equal
                     to the per share redemption or repurchase price received by
                     a holder of Common Stock with respect to such rights or
                     warrants (assuming such

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                     holder had retained such rights or warrants), made to all
                     holders of Common Stock as of the date of such redemption
                     or repurchase; and

                     (2)    in the case of such rights or warrants all of which
                     shall have expired or been terminated without exercise, the
                     Relevant Price shall be readjusted as if such rights and
                     warrants had never been issued.

              For purposes of this Section 12.4(d) and Sections 12.4(a), 12.4(b)
              and 12.4(c), any dividend or distribution to which this Section
              12.4(d) is applicable that also includes shares of Common Stock, a
              subdivision or combination of Common Stock to which Section
              12.4(c) applies, or rights or warrants to subscribe for or
              purchase shares of Common Stock to which Section 12.4(c) applies
              (or any combination thereof), shall be deemed instead to be:

                     (1)    a dividend or distribution of the evidences of
                     indebtedness, assets, shares of capital stock, rights or
                     warrants other than such shares of Common Stock, such
                     subdivision or combination or such rights or warrants to
                     which Sections 12.4(a), 12.4(b) and 12.4(c) apply,
                     respectively (and any Relevant Price reduction required by
                     this Section 12.4(d) with respect to such dividend or
                     distribution shall then be made), immediately followed by

                     (2)    a dividend or distribution of such shares of Common
                     Stock, such subdivision or combination or such rights or
                     warrants (and any further Relevant Price reduction required
                     by Sections 12.4(a), 12.4(b) and 12.4(c) with respect to
                     such dividend or distribution shall then be made), except:

                            (A)    the Record Date of such dividend or
                            distribution shall be substituted as (x) "the date
                            fixed for the determination of stockholders entitled
                            to receive such dividend or other distribution",
                            "Record Date fixed for such determinations" and
                            "Record Date" within the meaning of Section 12.4(a),
                            (y) "the day upon which such subdivision becomes
                            effective" and "the day upon which such combination
                            becomes effective" within the meaning of Section
                            12.4(b), and (z) as "the date fixed for the
                            determination of stockholders entitled to receive
                            such rights or warrants", "the Record Date fixed for
                            the determination of the stockholders entitled to
                            receive such rights or warrants" and such "Record
                            Date" within the meaning of Section 12.4(c); and

                            (B)    any shares of Common Stock included in such
                            dividend or distribution shall not be deemed
                            "outstanding at the close of business on the date
                            fixed for such determination" within the meaning of
                            Section 12.4(a) and any reduction or increase in the
                            number of shares of Common Stock resulting from such
                            subdivision or combination shall be disregarded in
                            connection with such dividend or distribution.

       (e)    In case the Company shall, by dividend or otherwise, distribute to
       all holders of its Common Stock cash (excluding any cash that is
       distributed upon a reclassification, change,

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       merger, consolidation, statutory share exchange, combination, sale or
       conveyance to which Section 12.12 applies or as part of a distribution
       referred to in Section 12.4(d)), in an aggregate amount that, combined
       together with:

              (1)    the aggregate amount of any other such distributions to all
              holders of Common Stock made exclusively in cash within the 12
              months preceding the date of payment of such distribution, and in
              respect of which no adjustment pursuant to this Section 12.4(e)
              has been made; and

              (2)    the aggregate of any cash plus the fair market value (as
              determined by the Board of Directors, whose determination shall be
              conclusive and set forth in a Board Resolution) of consideration
              payable in respect of any tender offer by the Company or any of
              its subsidiaries for all or any portion of the Common Stock
              concluded within the 12 months preceding the date of such
              distribution, and in respect of which no adjustment pursuant to
              Section 12.4(f) has been made;

              exceeds 10% of the product of the Current Market Price (determined
              as provided in Section 12.4(g)) on the Record Date with respect to
              such distribution times the number of shares of Common Stock
              outstanding on such date, then and in each such case, immediately
              after the close of business on such date, the Relevant Price shall
              be reduced so that the same shall equal the price determined by
              multiplying the Relevant Price in effect immediately prior to the
              close of business on such Record Date by a fraction:

                     (i)    the numerator of which shall be equal to the Current
                     Market Price on the Record Date less an amount equal to the
                     quotient of (x) the excess of such combined amount over
                     such 10% and (y) the number of shares of Common Stock
                     outstanding on the Record Date, and

                     (ii)   the denominator of which shall be equal to the
                     Current Market Price on such date.

                     However, in the event that the then fair market value (as
                     so determined) of the portion of the securities so
                     distributed applicable to one share of Common Stock is
                     equal to or greater than the Current Market Price on the
                     Record Date, in lieu of the foregoing adjustment, adequate
                     provision shall be made so that each Holder shall have the
                     right to receive upon conversion of a Security (or any
                     portion thereof) the amount of cash such Holder would have
                     received had such Holder converted such Security (or
                     portion thereof) immediately prior to such Record Date. In
                     the event that such dividend or distribution is not so paid
                     or made, the Relevant Price shall again be adjusted to be
                     the Relevant Price which would then be in effect if such
                     dividend or distribution had not been declared.

       (f)    In case a tender offer made by the Company or any of its
       subsidiaries for all or any portion of the Common Stock shall expire and
       such tender offer (as amended upon the expiration thereof) shall require
       the payment to stockholders (based on the acceptance (up to any maximum
       specified in the terms of the tender offer) of Purchased Shares (as
       defined below)) of an aggregate consideration having a fair market value
       (as determined by the Board of

                                       68
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       Directors, whose determination shall be conclusive and set forth in a
       Board Resolution) that combined together with:

              (1)    the aggregate of the cash plus the fair market value (as
              determined by the Board of Directors, whose determination shall be
              conclusive and set forth in a Board Resolution), as of the
              expiration of such tender offer, of consideration payable in
              respect of any other tender offers, by the Company or any of its
              subsidiaries for all or any portion of the Common Stock expiring
              within the 12 months preceding the expiration of such tender offer
              and in respect of which no adjustment pursuant to this Section
              12.4(f) has been made; and

              (2)    the aggregate amount of any distributions to all holders of
              the Company's Common Stock made exclusively in cash within 12
              months preceding the expiration of such tender offer and in
              respect of which no adjustment pursuant to Section 12.4(e) has
              been made,

              exceeds 10% of the product of the Current Market Price (determined
              as provided in Section 12.4(g)) as of the last time (the
              "Expiration Time") tenders could have been made pursuant to such
              tender offer (as it may be amended) times the number of shares of
              Common Stock outstanding (including any tendered shares) on the
              Expiration Time,

              then, and in each such case, immediately prior to the opening of
              business on the day after the date of the Expiration Time, the
              Relevant Price shall be adjusted so that the same shall equal the
              price determined by multiplying the Relevant Price in effect
              immediately prior to close of business on the date of the
              Expiration Time by a fraction:

                     (i)    the numerator of which shall be the number of shares
                     of Common Stock outstanding (including any tendered shares)
                     at the Expiration Time multiplied by the Current Market
                     Price of the Common Stock on the Trading Day next
                     succeeding the Expiration Time; and

                     (ii)   the denominator shall be the sum of (x) the fair
                     market value (determined as aforesaid) of the aggregate
                     consideration payable to stockholders based on the
                     acceptance (up to any maximum specified in the terms of the
                     tender offer) of all shares validly tendered and not
                     withdrawn as of the Expiration Time (the shares deemed so
                     accepted, up to any such maximum, being referred to as the
                     "Purchased Shares") and (y) the product of the number of
                     shares of Common Stock outstanding (less any Purchased
                     Shares) on the Expiration Time and the Current Market Price
                     of the Common Stock on the Trading Day next succeeding the
                     Expiration Time.

              Such reduction (if any) shall become effective immediately prior
              to the opening of business on the day following the Expiration
              Time. In the event that the Company is obligated to purchase
              shares pursuant to any such tender offer, but the Company is
              permanently prevented by applicable law from effecting any such
              purchases or all such purchases are rescinded, the Relevant Price
              shall again be adjusted to be the Relevant Price which would then
              be in effect if such tender offer had not been made. If the
              application of this Section 12.4(f) to any tender offer would
              result in an increase in the

                                       69
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              Relevant Price, no adjustment shall be made for such tender offer
              under this Section 12.4(f).

       (g)    For purposes of this Section 12.4, the following terms shall have
       the meanings indicated:

              (1)    "Current Market Price" shall mean the average of the daily
              Trading Prices per share of Common Stock for the ten consecutive
              Trading Days immediately prior to the date in question; provided,
              however, that if:

                     (i)    the "ex" date (as hereinafter defined) for any event
                     (other than the issuance or distribution requiring such
                     computation) that requires an adjustment to the Relevant
                     Price pursuant to Section 12.4(a), (b), (c), (d), (e) or
                     (f) occurs during such ten consecutive Trading Days, the
                     Trading Price for each Trading Day prior to the "ex" date
                     for such other event shall be adjusted by multiplying such
                     Trading Price by the same fraction by which the Relevant
                     Price is so required to be adjusted as a result of such
                     other event;

                     (ii)   the "ex" date for any event (other than the issuance
                     or distribution requiring such computation) that requires
                     an adjustment to the Relevant Price pursuant to Section
                     12.4(a), (b), (c), (d), (e) or (f) occurs on or after the
                     "ex" date for the issuance or distribution requiring such
                     computation and prior to the day in question, the Trading
                     Price for each Trading Day on and after the "ex" date for
                     such other event shall be adjusted by multiplying such
                     Trading Price by the reciprocal of the fraction by which
                     the Relevant Price is so required to be adjusted as a
                     result of such other event; and

                     (iii)  the "ex" date for the issuance or distribution
                     requiring such computation is prior to the day in question,
                     after taking into account any adjustment required pursuant
                     to clause (i) or (ii) of this proviso, the Trading Price
                     for each Trading Day on or after such "ex" date shall be
                     adjusted by adding thereto the amount of any cash and the
                     fair market value (as determined by the Board of Directors
                     in a manner consistent with any determination of such value
                     for purposes of Section 12.4(d) or (f), whose determination
                     shall be conclusive and set forth in a Board Resolution) of
                     the evidences of indebtedness, shares of capital stock or
                     assets being distributed applicable to one share of Common
                     Stock as of the close of business on the day before such
                     "ex" date.

                     For purposes of any computation under Section 12.4(f), the
                     Current Market Price of the Common Stock on any date shall
                     be deemed to be the average of the daily Trading Prices per
                     share of Common Stock for such day and the next two
                     succeeding Trading Days; provided, however, that if the
                     "ex" date for any event (other than the tender offer
                     requiring such computation) that requires an adjustment to
                     the Relevant Price pursuant to Section 12.4(a), (b), (c),
                     (d), (e) or (f) occurs on or after the Expiration Time for
                     the tender or exchange offer requiring such computation and
                     prior to the day in question, the Trading Price for each
                     Trading Day on and after the "ex" date for such other event
                     shall be adjusted by multiplying such Trading Price by the
                     reciprocal of the fraction by which the Relevant Price is
                     so required to be adjusted

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<PAGE>   80

                     as a result of such other event. For purposes of this
                     paragraph, the term "ex" date, when used:

                     (A)    with respect to any issuance or distribution, means
                     the first date on which the Common Stock trades regular way
                     on the relevant exchange or in the relevant market from
                     which the Trading Price was obtained without the right to
                     receive such issuance or distribution;

                     (B)    with respect to any subdivision or combination of
                     shares of Common Stock, means the first date on which the
                     Common Stock trades regular way on such exchange or in such
                     market after the time at which such subdivision or
                     combination becomes effective; and

                     (C)    with respect to any tender or exchange offer, means
                     the first date on which the Common Stock trades regular way
                     on such exchange or in such market after the Expiration
                     Time of such offer.

                     Notwithstanding the foregoing, whenever successive
                     adjustments to the Relevant Price are called for pursuant
                     to this Section 12.4, such adjustments shall be made to the
                     Current Market Price as may be necessary or appropriate to
                     effectuate the intent of this Section 12.4 and to avoid
                     unjust or inequitable results as determined in good faith
                     by the Board of Directors.

              (2)    "fair market value" shall mean the amount which a willing
              buyer would pay a willing seller in an arm's length transaction.

              (3)    "Record Date" shall mean, with respect to any dividend,
              distribution or other transaction or event in which the holders of
              Common Stock have the right to receive any cash, securities or
              other property or in which the Common Stock (or other applicable
              security) is exchanged for or converted into any combination of
              cash, securities or other property, the date fixed for
              determination of stockholders entitled to receive such cash,
              securities or other property (whether such date is fixed by the
              Board of Directors or by statute, contract or otherwise).

       (h)    The Company may make such reductions in the Conversion Price, in
       addition to those required by Sections 12.4(a), (b), (c), (d), (e) or
       (f), as the Board of Directors considers to be advisable to avoid or
       diminish any income tax to holders of Common Stock or rights to purchase
       Common Stock resulting from any dividend or distribution of stock (or
       rights to acquire stock) or from any event treated as such for income tax
       purposes.

       To the extent permitted by applicable law, the Company from time to time
       may reduce the Conversion Price by any amount for any period of time if
       the period is at least 20 days and the reduction is irrevocable during
       the period and the Board of Directors determines in good faith that such
       reduction would be in the best interests of the Company, which
       determination shall be conclusive and set forth in a Board Resolution.
       Whenever the Relevant Price is reduced, the Company shall mail to the
       Trustee and each Holder at the address of such Holder as it appears

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<PAGE>   81

       in the Register a notice of the reduction at least 15 days prior to the
       date the reduced Relevant Price takes effect, and such notice shall state
       the reduced Conversion Price and the period during which it will be in
       effect.

       (i)    No adjustment in the Relevant Price shall be required unless such
       adjustment would require an increase or decrease of at least 1% in such
       price; provided, however, that any adjustments which by reason of this
       Section 12.4(i) are not required to be made shall be carried forward and
       taken into account in any subsequent adjustment. All calculations under
       this Article 12 shall be made by the Company and shall be made to the
       nearest cent or to the nearest one hundredth of a share, as the case may
       be. No adjustment need be made for a change in the par value or no par
       value of the Common Stock.

       (j)    In any case in which this Section 12.4 provides that an adjustment
       shall become effective immediately after a Record Date for an event, the
       Company may defer until the occurrence of such event (i) issuing to the
       Holder of any Security converted after such Record Date and before the
       occurrence of such event the additional shares of Common Stock issuable
       upon such conversion by reason of the adjustment required by such event
       over and above the Common Stock issuable upon such conversion before
       giving effect to such adjustment and (ii) paying to such holder any
       amount in cash in lieu of any fraction pursuant to Section 12.3.

       (k)    For purposes of this Section 12.4, the number of shares of Common
       Stock at any time outstanding shall not include shares held in the
       treasury of the Company but shall include shares issuable in respect of
       scrip certificates issued in lieu of fractions of shares of Common Stock.
       The Company will not pay any dividend or make any distribution on shares
       of Common Stock held in the treasury of the Company.

       (l)    If the distribution date for the rights provided in the Company's
       rights agreement, if any, occurs prior to the date a Security is
       converted, the Holder of the Security who converts such Security after
       the distribution date is not entitled to receive the rights that would
       otherwise be attached (but for the date of conversion) to the shares of
       Common Stock received upon such conversion; provided, however, that an
       adjustment shall be made to the Relevant Price pursuant to clause 12.4(b)
       as if the rights were being distributed to the common stockholders of the
       Company immediately prior to such conversion. If such an adjustment is
       made and the rights are later redeemed, invalidated or terminated, then a
       corresponding reversing adjustment shall be made to the Relevant Price,
       on an equitable basis, to take account of such event.

Section 12.5 Annual Adjustment of Conversion Price.

       (a)    Without limitation of Section 12.4 (except as described in (b)
below), the Conversion Price shall be subject to adjustment on the twenty-first
Trading Day in October, starting in October 2001 (the "Annual Adjustment Date"),
to the lower of the following:

                     (i)    $4.75 per share of Common Stock (the "Maximum Annual
                     Adjusted Conversion Price"); and

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<PAGE>   82

                     (ii)   the higher of (x) $4.00 per share of Common Stock
                     (the "Minimum Annual Adjusted Conversion Price") and (y)
                     the Current Market Price as defined in Section 12.4(g)(1)
                     but inserting "twenty" in place of "ten", as determined on
                     the Annual Adjustment Date.

       (b)    In the event any downward adjustment is made to the Conversion
Price pursuant to this Section 12.5, any previous adjustment made to the
Conversion Price (but not any previous adjustment to the Maximum Annual Adjusted
Conversion Price or the Minimum Annual Adjusted Conversion Price) pursuant to
Section 12.4, and with respect to events occurring prior to the beginning of the
period over which the Current Market Price resulting in such downward adjustment
has been determined, shall be disregarded in any adjustment of the Conversion
Price (but not any previous adjustment to the Maximum Annual Adjusted Conversion
Price or the Minimum Annual Adjusted Conversion Price) pursuant to Section 12.4
occurring after such downward adjustment.

Section 12.6 Notice of Adjustments of Relevant Price.

Whenever the Relevant Price is adjusted as herein provided (other than in the
case of an adjustment pursuant to the second paragraph of Section 12.4(h) for
which the notice required by such paragraph has been provided), the Company
shall promptly file with the Trustee and any Conversion Agent other than the
Trustee an Officers' Certificate setting forth the adjusted Relevant Price and
showing in reasonable detail the facts upon which such adjustment is based.
Promptly after delivery of such Officers' Certificate, the Company shall prepare
a notice stating that the Relevant Price has been adjusted and setting forth the
adjusted Relevant Price and the date on which each adjustment becomes effective,
and shall mail such notice to each Holder at the address of such Holder as it
appears in the Register within 20 days of the effective date of such adjustment.
Failure to deliver such notice shall not affect the legality or validity of any
such adjustment.

Section 12.7 Notice Prior to Certain Actions.

In case at any time after the date hereof:

       (1)    the Company shall declare a dividend (or any other distribution)
       on its Common Stock payable otherwise than in cash out of its capital
       surplus or its consolidated retained earnings;

       (2)    the Company shall authorize the granting to the holders of its
       Common Stock of rights or warrants to subscribe for or purchase any
       shares of capital stock of any class (or of securities convertible into
       shares of capital stock of any class) or of any other rights;

       (3)    there shall occur any reclassification of the Common Stock of the
       Company (other than a subdivision or combination of its outstanding
       Common Stock, a change in par value, a change from par value to no par
       value or a change from no par value to par value), or any merger,
       consolidation, statutory share exchange or combination to which the
       Company is a party and for which approval of any shareholders of the
       Company is required, or the sale, transfer or conveyance of all or
       substantially all of the assets of the Company; or

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

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<PAGE>   83

       the Company shall cause to be filed at each office or agency maintained
       for the purpose of conversion of securities pursuant to Section 9.2, and
       shall cause to be provided to the Trustee and all Holders in accordance
       with Section 14.2, at least 20 days (or 10 days in any case specified in
       clause (1) or (2) above) prior to the applicable record or effective date
       hereinafter specified, a notice stating:

              (A)    the date on which a record is to be taken for the purpose
              of such dividend, distribution, rights 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 or warrants are to be determined; or

              (B)    the date on which such reclassification, merger,
              consolidation, statutory share exchange, combination, sale,
              transfer, conveyance, 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, merger,
              consolidation, statutory share exchange, sale, transfer,
              dissolution, liquidation or winding up.

              Neither the failure to give such notice nor any defect therein
              shall affect the legality or validity of the proceedings or
              actions described in clauses (1) through (4) of this Section 12.7.

Section 12.8 Company to Reserve Common Stock.

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

Section 12.9 Taxes on Conversions.

Except as provided in the next sentence, the Company will pay any and all taxes
(other than taxes on income) and duties that may be payable in respect of the
issue or delivery of shares of Common Stock on conversion of Securities pursuant
hereto. A Holder delivering a Security for conversion shall be liable for and
will be required to pay any tax or duty which may be payable in respect of any
transfer involved in the issue and delivery of shares of Common Stock in a name
other than that of the Holder of the Security or Securities to be converted, and
no such issue or delivery shall be made unless the Person requesting such issue
has paid to the Company the amount of any such tax or duty, or has established
to the satisfaction of the Company that such tax or duty has been paid.

Section 12.10 Covenant as to Common Stock.

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<PAGE>   84

The Company covenants that all shares of Common Stock which may be issued upon
conversion of Securities will upon issue be fully paid and nonassessable and,
except as provided in Section 12.9, the Company will pay all taxes, liens and
charges with respect to the issue thereof.

Section 12.11  Cancellation of Converted Securities.

All Securities delivered for conversion shall be delivered to the Trustee to be
canceled by or at the direction of the Trustee, which shall dispose of the same
as provided in Section 2.15.

Section 12.12  Effect of Reclassification, Consolidation, Merger or Sale.

If any of following events occur, namely:

              (i)    any reclassification or change of the outstanding shares of
              Common Stock (other than a change in par value, or from par value
              to no par value, or from no par value to par value, or as a result
              of a subdivision or combination);

              (ii)   any merger, consolidation, statutory share exchange or
              combination of the Company with another corporation as a result of
              which holders of Common Stock shall be entitled to receive stock,
              securities or other property or assets (including cash) with
              respect to or in exchange for such Common Stock; or

              (iii)  any sale or conveyance of the properties and assets of the
              Company as, or substantially as, an entirety to any other
              corporation as a result of which holders of Common Stock shall be
              entitled to receive stock, securities or other property or assets
              (including cash) with respect to or in exchange for such Common
              Stock;

the Company or the successor or purchasing corporation, as the case may be,
shall execute with the Trustee a supplemental indenture (which shall comply with
the TIA as in force at the date of execution of such supplemental indenture if
such supplemental indenture is then required to so comply) providing that such
Security shall be convertible into the kind and amount of shares of stock and
other securities or property or assets (including cash) which such Holder would
have been entitled to receive upon such reclassification, change, merger,
consolidation, statutory share exchange, combination, sale or conveyance had
such Securities been converted into Common Stock immediately prior to such
reclassification, change, merger, consolidation, statutory share exchange,
combination, sale or conveyance assuming such holder of Common Stock did not
exercise its rights of election, if any, as to the kind or amount of securities,
cash or other property receivable upon such merger, consolidation, statutory
share exchange, sale or conveyance (provided that, if the kind or amount of
securities, cash or other property receivable upon such merger, consolidation,
statutory share exchange, sale or conveyance is not the same for each share of
Common Stock in respect of which such rights of election shall not have been
exercised ("Non-Electing Share"), then for the purposes of this Section 12.12
the kind and amount of securities, cash or other property receivable upon such
merger, consolidation, statutory share exchange, sale or conveyance for 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 shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Article 12. If, in the case
of any such reclassification, change, merger, consolidation, statutory share

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<PAGE>   85

exchange, combination, sale or conveyance, the stock or other securities and
assets receivable thereupon by a holder of shares of Common Stock includes
shares of stock or other securities and assets of a corporation other than the
successor or purchasing corporation, as the case may be, in such
reclassification, change, merger, consolidation, statutory share exchange,
combination, sale or conveyance, then such supplemental indenture shall also be
executed by such other corporation and shall contain such additional provisions
to protect the interests of the Holders of the Securities as the Board of
Directors shall reasonably consider necessary by reason of the foregoing,
including to the extent practicable the provisions providing for the Repurchase
Rights set forth in Article 13.

The Company shall cause notice of the execution of such supplemental indenture
to be mailed to each Holder, at the address of such Holder as it appears on the
Register, within 20 days after execution thereof. Failure to deliver such notice
shall not affect the legality or validity of such supplemental indenture.

The above provisions of this Section shall similarly apply to successive
reclassifications, mergers, consolidations, statutory share exchanges,
combinations, sales and conveyances.

If this Section 12.12 applies to any event or occurrence, Section 12.4 shall not
apply.

Section 12.13 Responsibility of Trustee for Conversion Provisions.

The Trustee, subject to the provisions of Section 5.1, and any Conversion Agent
shall not at any time be under any duty or responsibility to any Holder of
Securities to determine whether any facts exist which may require any adjustment
of the Conversion Price, or with respect to the nature, intent or calculation of
any such adjustments when made, or with respect to the method employed, or
herein or in any supplemental indenture provided to be employed, in making the
same. Neither the Trustee, subject to the provisions of Section 5.1, nor any
Conversion Agent shall be accountable with respect to the validity or value (of
the kind or amount) of any Common Stock, or of any other securities or property,
which may at any time be issued or delivered upon the conversion of any
Security; and it or they do not make any representation with respect thereto.
Neither the Trustee, subject to the provisions of Section 5.1, nor any
Conversion Agent shall be responsible for any failure of the Company to make any
cash payment or to issue, transfer or deliver any shares of stock or share
certificates or other securities or property upon the surrender of any Security
for the purpose of conversion; and the Trustee, subject to the provisions of
Section 5.1, and any Conversion Agent shall not be responsible or liable for any
failure of the Company to comply with any of the covenants of the Company
contained in this Article.

                                   ARTICLE 13

                                  SUBORDINATION

Section 13.1 Securities Subordinated to Senior Debt.

The Company covenants and agrees, and each Holder of Securities, by such
Holder's acceptance thereof, likewise covenants and agrees, that the
Indebtedness represented by the Securities and the payment of the principal of
and premium, if any, and interest (including Additional Amounts, if any) on each
and all of the Securities is hereby expressly subordinated and junior, to the
extent and in the manner set forth and as set forth in this Section 13.1, in
right of payment to the prior payment in full of all Senior Debt.

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<PAGE>   86

       (a)    In the event of any distribution of assets of the Company upon any
       dissolution, winding up, liquidation or reorganization of the Company,
       whether in bankruptcy, insolvency, reorganization or receivership
       proceedings or upon an assignment for the benefit of creditors or any
       other marshalling of the assets and liabilities of the Company or
       otherwise, the holders of all Senior Debt shall first be entitled to
       receive payment of the full amount due thereon in respect of all such
       Senior Debt and all other amounts due, or provision shall be made for
       such amount in cash, or other payments satisfactory to the holders of
       Senior Debt, before the Holders of any of the Securities are entitled to
       receive any payment or distribution of any character, whether in cash,
       securities or other property, on account of the principal of or premium,
       if any, or interest (including Additional Amounts or Interest Make-Whole
       Payment, if any), if any on the Indebtedness evidenced by the Securities.

       (b)    In the event of any acceleration of Maturity of the Securities
       because of an Event of Default, unless the full amount due in respect of
       all Senior Debt is paid in cash or other form of payment satisfactory to
       the holders of Senior Debt, no payment shall be made by the Company with
       respect to the principal of, premium, if any, or interest (including
       Additional Amounts or Interest Make-Whole Payment, if any) on the
       Securities or to acquire any of the Securities (including any redemption,
       conversion or cash repurchase pursuant to the exercise of the Repurchase
       Right), and the Company shall give prompt written notice of such
       acceleration to such holders of Senior Debt.

       (c)    In the event of and during the continuance of any default in
       payment of the principal of or premium, if any, or interest on, rent or
       other payment obligation in respect of, any Senior Debt, unless all such
       payments due in respect of such Senior Debt have been paid in full in
       cash or other payments satisfactory to the holders of Senior Debt, no
       payment shall be made by the Company with respect to the principal of,
       premium, if any, or interest (including Additional Amounts or Interest
       Make-Whole Payment, if any) on the Securities or to acquire any of the
       Securities (including any redemption, conversion or cash repurchase
       pursuant to the exercise of the Repurchase Right). The Company shall give
       prompt written notice to the Trustee of any default under any Senior Debt
       or under any agreement pursuant to which Senior Debt may have been
       issued.

       (d)    During the continuance of any event of default with respect to any
       Designated Senior Debt, as such event of default is defined under any
       such Designated Senior Debt or in any agreement pursuant to which any
       Designated Senior Debt has been issued (other than a default in payment
       of the principal of or premium, if any, or interest on, rent or other
       payment obligation in respect of any Designated Senior Debt), permitting
       the holder or holders of such Designated Senior Debt to accelerate the
       maturity thereof (or in the case of any lease, permitting the landlord
       either to terminate the lease or to require the Company to make an
       irrevocable offer to terminate the lease following an event of default
       thereunder), no payment shall be made by the Company, directly or
       indirectly, with respect to principal of, premium, if any, or interest
       (including Additional Amounts or Interest Make-Whole Payment, if any) on
       the Securities for 179 days following notice in writing (a "Payment
       Blockage Notice") to the Company, from any holder or holders of such
       Designated Senior Debt or their representative or representatives or the
       trustee or trustees under any indenture or under which any instrument
       evidencing any

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<PAGE>   87

       such Designated Senior Debt may have been issued, that such an event of
       default has occurred and is continuing, unless such event of default has
       been cured or waived or such Designated Senior Debt has been paid in
       full; provided, however, if the maturity of such Designated Senior Debt
       is accelerated (or in the case of any lease, as a result of such event of
       default, the landlord under the lease has given the Company notice of its
       intention to terminate the lease or to require the Company to make an
       irrevocable offer to terminate the lease), no payment may be made on the
       Securities until such Designated Senior Debt has been paid in full in
       cash or other payment satisfactory to the holders of such Designated
       Senior Debt or such acceleration (or termination, in the case of a lease)
       has been cured or waived.

       For purposes of this Section 13.1(d), such Payment Blockage Notice shall
       be deemed to include notice of all other events of default under such
       indenture or instrument which are continuing at the time of the event of
       default specified in such Payment Blockage Notice. The provisions of this
       Section 13.1(d) shall apply only to one such Payment Blockage Notice
       given in any period of 365 days with respect to any issue of Designated
       Senior Debt, and no such continuing event of default that existed or was
       continuing on the date of delivery of any Payment Blockage Notice shall
       be, or shall be made, the basis for a subsequent Payment Blockage Notice.

       (e)    In the event that, notwithstanding the foregoing provisions of
       Sections 13.1(a), 13.1(b), 13.1(c) and 13.1(d), any payment on account of
       principal, premium, if any, or interest (including Additional Amounts or
       Interest Make-Whole Payment, if any) on the Securities shall be made by
       or on behalf of the Company and received by the Trustee, by any Holder or
       by any Paying Agent (or, if the Company is acting as its own Paying
       Agent, money for any such payment shall be segregated and held in trust):

       (i)    after the occurrence of an event specified in Section 13.1(a) or
       13.1(b), then, unless all Senior Debt is paid in full in cash, or
       provision shall be made therefor;

       (ii)   after the happening of an event of default of the type specified
       in Section 13.1(c) above, then, unless the amount of such Senior Debt
       then due shall have been paid in full, or provision made therefor or such
       event of default shall have been cured or waived; or

       (iii)  after the happening of an event of default of the type specified
       in Section 13.1(d) above and delivery of a Payment Blockage Notice, then,
       unless such event of default shall have been cured or waived or the
       179-day period specified in Section 13.1(d) shall have expired;

       such payment (subject, in each case, to the provisions of Section 13.7)
       shall be held in trust for the benefit of, and shall be immediately paid
       over to, the holders of Designated Senior Debt (unless an event described
       in Section 13.1(a), (b) or (c) has occurred, in which case the payment
       shall be held in trust for the benefit of, and shall be immediately paid
       over to all holders of Senior Debt) or their representative or
       representatives or the trustee or trustees under any indenture under
       which any instruments evidencing any of the Designated Senior Debt or
       Senior Debt, as the case may be, may have been issued, as their interests
       may appear.

Section 13.2 Subrogation.

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<PAGE>   88

Subject to the payment in full of all Senior Debt to which the Indebtedness
evidenced by the Securities is in the circumstances subordinated as provided in
Section 13.1, the Holders of the Securities shall be subrogated to the rights of
the holders of such Senior Debt to receive payments or distributions of cash,
property or securities of the Company applicable to such Senior Debt until all
amounts owing on the Securities shall be paid in full, and, as between the
Company, its creditors other than holders of such Senior Debt, and the Holders
of the Securities, no such payment or distribution made to the holders of Senior
Debt by virtue of this Article which otherwise would have been made to the
holders of the Securities shall be deemed to be a payment by the Company on
account of such Senior Debt; provided, however, that 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.

Section 13.3 Obligation of the Company is Absolute and Unconditional.

Nothing contained in this Article or elsewhere in this Indenture or in the
Securities is intended to or shall impair, as between the Company, its creditors
other than the 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 premium, if any, and interest
(including Additional Amounts or Interest Make-Whole Payment, if any) on the
Securities as and when the same shall become due and payable in accordance with
their terms, or is intended to or shall affect the relative rights of the
Holders of the Securities and creditors of the Company other than the holders of
Senior Debt, nor shall anything contained herein or therein 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 in respect of cash,
property or securities of the Company received upon the exercise of any such
remedy.

Section 13.4 Maturity of or Default on Senior Debt.

Upon the maturity of any Senior Debt by lapse of time, acceleration or
otherwise, all principal of or premium, if any, or interest on, rent or other
payment obligations in respect of all such matured Senior Debt shall first be
paid in full, or such payment shall have been duly provided for, before any
payment on account of principal, or premium, if any, or interest (including
Additional Amounts or Interest Make-Whole Payment, if any) is made upon the
Securities.

Section 13.5 Payments on Securities Permitted.

Except as expressly provided in this Article, nothing contained in this Article
shall affect the obligation of the Company to make, or prevent the Company from
making, payments of the principal of, or premium, if any, or interest (including
Additional Amounts or Interest Make-Whole Payment, if any) on the Securities in
accordance with the provisions hereof and thereof, or shall prevent the Trustee
or any Paying Agent from applying any monies deposited with it hereunder to the
payment of the principal of, or premium, if any, or interest (including
Additional Amounts or Interest Make-Whole Payment, if any) on the Securities.

Section 13.6 Effectuation of Subordination by Trustee.

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<PAGE>   89

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

Upon any payment or distribution of assets of the Company referred to in this
Article, the Trustee and the Holders of the Securities shall be entitled to rely
upon any order or decree made by any court of competent jurisdiction in which
any such dissolution, winding up, liquidation or reorganization proceeding
affecting the affairs of the Company is pending or upon a certificate of the
trustee in bankruptcy, receiver, assignee for the benefit of creditors,
liquidating trustee or agent or other Person making any payment or distribution,
delivered to the Trustee or to the Holders of the Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, and as to other facts pertinent to the right of such Persons under
this Article, and if such evidence is not furnished, the Trustee may defer any
payment to such Persons pending judicial determination as to the right of such
Persons to receive such payment.

Section 13.7 Knowledge of Trustee.

Notwithstanding the provision of this Article or any other provisions of this
Indenture, the Trustee shall not be charged with knowledge of the existence of
any Senior Debt, of any default in payment of principal of, premium, if any, or
interest on, rent or other payment obligation in respect of any Senior Debt, or
of any facts which would prohibit the making of any payment of monies to or by
the Trustee, or the taking of any other action by the Trustee, unless a
Responsible Officer of the Trustee having responsibility for the administration
of the trust established by this Indenture shall have received written notice
thereof from the Company, any Holder of Securities, any Paying Agent or
Conversion Agent of the Company or the holder or representative of any class of
Senior Debt, and, prior to the receipt of any such written notice, the Trustee
shall be entitled in all respects to assume that no such default or facts exist;
provided, however, that unless on the third Business Day prior to the date upon
which by the terms hereof any such monies may become payable for any purpose the
Trustee shall have received the notice provided for in this Section 13.7, then,
anything herein contained to the contrary notwithstanding, the Trustee shall
have full power and authority to receive such monies and apply the same to the
purpose for which they were received, and shall not be affected by any notice to
the contrary which may be received by it on or after such date.

Section 13.8 Trustee's Relation to Senior Debt.

The Trustee shall be entitled to all the rights set forth in this Article with
respect to any Senior Debt at the time 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 contained in this Article shall apply to claims of or payments to the
Trustee under or pursuant to Section 5.8.

With respect to the holders of Senior Debt, the Trustee undertakes to perform or
to observe only such of its covenants and obligations as are specifically set
forth in this Article, and no implied covenants or

                                       80
<PAGE>   90

obligations with respect to the holders of Senior Debt shall be read into this
Indenture against the Trustee. The Trustee shall not be deemed to owe any
fiduciary duty to the holders of Senior Debt and the Trustee shall not be liable
to any holder of Senior Debt if it shall pay over or deliver to Holders, the
Company or any other Person monies or assets to which any holder of Senior Debt
shall be entitled by virtue of this Article or otherwise.

Section 13.9 Rights of Holders of Senior Debt Not Impaired.

No right of any present or future holder of any Senior Debt to enforce the
subordination herein shall at any time or in any way be prejudiced or impaired
by any act or failure to act on the part of the Company or by any noncompliance
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.

Section 13.10  Modification of Terms of Senior Debt.

Any renewal or extension of the time of payment of any Senior Debt or the
exercise by the holders of Senior Debt of any of their rights under any
instrument creating or evidencing Senior Debt, including without limitation the
waiver of default thereunder, may be made or done all without notice to or
assent from the Holders of the Securities and the Trustee.

No compromise, alteration, amendment, modification, extension, renewal or other
change of, or waiver, consent or other action in respect of, any liability or
obligation under or in respect of, or of any of the terms, covenants or
conditions of any indenture or other instrument under which any Senior Debt is
outstanding or of such Senior Debt, whether or not such release is in accordance
with the provisions or any applicable document, shall in any way alter or affect
any of the provisions of this Article or of the Securities relating to the
subordination thereof.

Section 13.11  Certain Conversions Not Deemed Payment.

For the purposes of this Article 13 only:

              (1)    the issuance and delivery of junior securities upon (A)
              conversion of Securities in accordance with Article 12 or (B)
              repurchase of Securities in accordance with Article 11 shall not
              be deemed to constitute a payment or distribution on account of
              the principal of, premium, if any, or interest (including
              Additional Amounts, if any) on Securities or on account of the
              purchase or other acquisition of Securities; and

              (2)    the payment, issuance or delivery of cash (except in
              satisfaction of fractional shares pursuant to Section 12.3 or
              pursuant to Section 11.3), property or securities (other than
              junior securities) upon (A) conversion of a Security or (B)
              repurchase of Securities in accordance with Article 11 hereof
              shall be deemed to constitute payment on account of the principal
              of, premium, if any, or interest (including Additional Amounts, if
              any) on such Security.

For the purposes of this Section 13.11, the term "junior securities" means:

                                       81
<PAGE>   91

       (a)    shares of any Common Stock of the Company; or

       (b)    other securities of the Company that are subordinated in right of
       payment to all Senior Debt that may be outstanding at the time of
       issuance or delivery of such securities to substantially the same extent
       as, or to a greater extent that, the Securities are so subordinated as
       provided in this Article.

Nothing contained in this Article 13 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 Securities, the right,
which is absolute and unconditional, of the Holder of any Security to convert
such Security in accordance with Article 12.

                                   ARTICLE 14

                     OTHER PROVISIONS OF GENERAL APPLICATION

Section 14.1 Trust Indenture Act Controls.

This Indenture is subject to the provisions of the TIA which are required to be
part of this Indenture, and shall, to the extent applicable, be governed by such
provisions.

Section 14.2 Notices.

Any notice or communication to the Company or the Trustee is duly given if in
writing and delivered in person or mailed by first-class mail to the address set
forth below:

       (a)    if to the Company:

              Online Resources Corporation
              7600 Colshire Drive
              McLean, Virginia  22102
              Attn: Carl Blandino

with a copy to:

              Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
              11911 Freedom Drive
              Suite 400
              Reston, Virginia  20190
              Attn:  Mark Wishner, Esq.

       (b)    if to the Trustee:

                                       82
<PAGE>   92

              Bankers Trust Company
              4 Albany Street
              New York, NY  10006
              Attn: Dorothy Robinson

The Company or the Trustee by notice to the other may designate additional or
different addresses for subsequent notices or communications.

Any notice or communication to a Holder shall be mailed by first-class mail to
his address shown on the Register kept by the Registrar. Failure to mail a
notice or communication to a Holder or any defect in such notice or
communication shall not affect its sufficiency with respect to other Holders.

If a notice or communication is mailed or sent in the manner provided above
within the time prescribed, it is duly given as of the date it is mailed,
whether or not the addressee receives it, except that notice to the Trustee
shall only be effective upon receipt thereof by the Trustee.

If the Company mails a notice or communication to Holders, it shall mail a copy
to the Trustee at the same time.

Section 14.3 Communication by Holders with Other Holders.

Holders may communicate pursuant to Section 312(b) of the TIA with other Holders
with respect to their rights under the Securities or this Indenture. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
Section 312(c) of the TIA.

Section 14.4 Acts of Holders of Securities.

              (a)    Any request, demand, authorization, direction, notice,
              consent, waiver or other action provided by this Indenture to be
              given or taken by Holders of Securities may be embodied in and
              evidenced by:

                     (1)    one or more instruments of substantially similar
                     tenor signed by such Holders in person or by agent or proxy
                     duly appointed in writing;

                     (2)    the record of Holders of Securities voting in favor
                     thereof, either in person or by proxies duly appointed in
                     writing, at any meeting of Holders of Securities duly
                     called and held in accordance with the provisions of
                     Article 8; or

                     (3)    a combination of such instruments and any such
                     record.

Except as herein otherwise expressly provided, such action shall become
effective when such instrument or instruments or record or both are delivered to
the Trustee and, where it is hereby expressly required, to the Company. Such
instrument or instruments and record (and the action embodied therein and
evidenced thereby) are herein sometimes referred to as the "Act" of the Holders
of Securities signing such instrument or instruments and so voting at such
meeting. Proof of execution of any such instrument or of a writing appointing
any such agent or proxy, or of the holding by any Person of a Security, shall be

                                       83
<PAGE>   93

sufficient for any purpose of this Indenture and (subject to Section 5.1)
conclusive in favor of the Trustee and the Company if made in the manner
provided in this Section. The record of any meeting of Holders of Securities
shall be proved in the manner provided in Section 8.6.

              (b)    The fact and date of the execution by any Person of any
              such instrument or writing may be provided in any manner which the
              Trustee reasonably deems sufficient.

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

              (d)    Any request, demand, authorization, direction, notice,
              consent, election, waiver or other Act of the Holders 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.

Section 14.5 Certificate and Opinion as to Conditions Precedent.

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 an Opinion of Counsel (which should also be
addressed to the Trustee and the Holders), unless such officer knows, or in the
exercise of reasonable care should know, that the Opinion of Counsel with
respect to the matters upon which such certificate or opinion is based is
erroneous. Any such certificate or Opinion of Counsel may be based, insofar as
it relates to factual matters, upon a certificate 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 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.

Upon any application or request by the Company to the Trustee to take any action
under any provision of this Indenture, the Company shall furnish to the Trustee
an Officers' Certificate stating that all conditions precedent, if any, provided
for in this Indenture (including any covenant compliance which constitutes a
condition or precedent) relating to the proposed action have been complied with
and an Opinion of Counsel stating that in the opinion of such Counsel all such
conditions precedent, if any, have been complied with, except that in the case
of any such application or request as to which the furnishing of

                                       84
<PAGE>   94

such documents is specifically required by any provision of this Indenture
relating to such particular application or request, no additional certificate or
opinion need be furnished.

Section 14.6 Statements Required in Certificate or Opinion.

Each Officers' Certificate or Opinion of Counsel with respect to compliance with
a condition or covenant provided for in this Indenture shall include:

                     (1)    a statement that each individual signing such
                     Officers' Certificate or Opinion of Counsel on behalf of
                     the Company 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 Officers' Certificate or Opinion
                     of Counsel are based;

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

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

                     (5)    a statement that, in the opinion of each individual,
                     such Officers' Certificate or Opinion of Counsel complies
                     with the provisions of this Section 14.6 and that the
                     Trustee may rely on such Officers' Certificate or Opinion
                     of Counsel.

Section 14.7 Effect of Headings and Table of Contents.

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

Section 14.8 Successors and Assigns.

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

Section 14.9 Separability Clause.

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

Section 14.10 Benefits of Indenture.

                                       85
<PAGE>   95

Nothing contained 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 of Securities, any benefit
or legal or equitable right, remedy or claim under this Indenture.

Section 14.11 Section Governing Law.

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

Section 14.12 Counterparts.

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

Section 14.13 Legal Holidays.

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

Section 14.14 Recourse Against Others.

No recourse for the payment of the principal of or premium, if any, or interest
(including Additional Amounts, if any) on any Security, or for any claim based
thereon or otherwise in respect thereof, shall be had against any incorporator,
shareholder, officer or director, as such, past, present or future, of the
Company or of any successor corporation, whether by virtue of any constitution,
statute or rule of law or by the enforcement of any assessment or penalty or
otherwise, all such liability being, by the acceptance thereof and as part of
the consideration for the issue thereof, expressly waived and released.

                                       86
<PAGE>   96

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

ONLINE RESOURCES CORPORATION

By:
   -----------------------------

Name:
Title:

BANKERS TRUST COMPANY, as trustee
and not in its individual capacity

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

                                       87
<PAGE>   97

                                    EXHIBIT A
                                FORM OF SECURITY

                               [FACE OF SECURITY]

[THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE REFERRED
TO HEREIN. THIS GLOBAL SECURITY MAY NOT BE EXCHANGED OR TRANSFERRED, IN WHOLE
BUT NOT IN PART, FOR A SECURITY REGISTERED IN THE NAME OF ANY PERSON OTHER THAN
DTC OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES SET FORTH IN THE
INDENTURE. BENEFICIAL INTERESTS IN THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED
EXCEPT IN ACCORDANCE WITH THE INDENTURE.]

       THE SECURITY EVIDENCED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER
       THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR ANY
       STATE SECURITIES LAWS AND MAY NOT BE REOFFERED, RESOLD, PLEDGED OR
       OTHERWISE TRANSFERRED EXCEPT AS PERMITTED BY THE FOLLOWING SENTENCES. THE
       HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS CONVERTIBLE NOTE REPRESENTS,
       ACKNOWLEDGES AND AGREES THAT IT WILL NOT REOFFER, RESELL, PLEDGE OR
       OTHERWISE TRANSFER THIS SECURITY OR THE COMMON STOCK ISSUABLE UPON
       CONVERSION OF THIS SECURITY EXCEPT IN COMPLIANCE WITH THE SECURITIES ACT
       AND IN ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES LAWS AND ONLY: (A)
       TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
       INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES
       ACT, (C) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
       SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED
       BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (E) TO AN
       "ACCREDITED INVESTOR" AS DEFINED IN RULE 501 UNDER THE SECURITIES ACT (AN
       "ACCREDITED INVESTOR") THAT IS ACQUIRING THE SECURITIES FOR ITS OWN
       ACCOUNT OR FOR THE ACCOUNT OF ONE OR MORE OTHER ACCREDITED INVESTORS OVER
       WHICH IT EXERCISES SOLE INVESTMENT DISCRETION THAT IS PURCHASING
       SECURITIES IN DEFINITIVE FORM AND THAT PRIOR TO SUCH TRANSFER, DELIVERS A
       SIGNED LETTER TO THE COMPANY AND THE TRUSTEE (OR THE TRANSFER AGENT IN
       THE CASE OF COMMON STOCK ISSUABLE UPON CONVERSION THEREOF) CERTIFYING
       THAT IT AND EACH SUCH ACCOUNT IS SUCH AN ACCREDITED INVESTOR AND IS
       ACQUIRING THE SECURITIES OR THE COMMON STOCK ISSUABLE UPON CONVERSION
       THEREOF FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION AND AGREEING TO
       THE RESTRICTIONS ON TRANSFER OF THE SECURITIES OR THE COMMON STOCK
       ISSUABLE UPON CONVERSION THEREOF OR (F) PURSUANT TO A REGISTRATION
       STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT AND
       WHICH CONTINUES TO BE EFFECTIVE AT THE TIME OF SUCH TRANSFER. THE HOLDER
       HEREOF AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY
       EVIDENCED HEREBY IS

                                       88
<PAGE>   98

       TRANSFERRED (OTHER THAN A TRANSFER PURSUANT TO CLAUSE (F) OF THE
       FOREGOING SENTENCE) A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

       IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) OR (E) ABOVE, THE
       HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE
       TRUSTEE (OR ANY SUCCESSOR TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS,
       LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY REQUIRE
       TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION
       FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
       OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED UPON THE EARLIER OF
       THE TRANSFER OF THE SECURITY EVIDENCED HEREBY PURSUANT TO CLAUSE (F)
       ABOVE.

                                       89
<PAGE>   99

                          ONLINE RESOURCES CORPORATION

                   8.0% Convertible Subordinated Note due 2005
                                  (the "Note")

<TABLE>
<S>                                                             <C>
                                                                No. 1
Original principal balance of all Notes                           Initial principal balance of this Note:
(including this Note):                                          $$
CUSIP:
</TABLE>

ONLINE RESOURCES CORPORATION, a Delaware corporation (the "Company", which term
includes any successor corporation under the Indenture hereinafter referred to),
for value received, hereby promises to pay to __________________ or its
registered assigns, the principal sum of ___________________________________
U.S. Dollars ($____________________________) on September 30, 2005.

Interest Payment Dates: April 1 and October 1, commencing April 1, 2000

              Regular Record Dates: September 15 and March 15

              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.

IN WITNESS WHEREOF, the Company has caused this Security to be duly executed
manually or by facsimile by its duly authorized officers.

Dated: ________, 2000              ONLINE RESOURCES CORPORATION

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

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

                                       90
<PAGE>   100

Trustee's Certificate of Authentication

This is one of the 8.0% Convertible Subordinated Notes due 2005 described in the
within-named Indenture.

as Trustee

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

Dated:  _________, 2000

                                       91
<PAGE>   101

                              [REVERSE OF SECURITY]
                          ONLINE RESOURCES CORPORATION

                   8.0% Convertible Subordinated Note due 2005

Capitalized terms used herein but not defined shall have the meanings assigned
to them in the Indenture referred to below unless otherwise indicated.

1.     Principal and Interest.

Online Resources Corporation, a Delaware corporation (the "Company"), promises
to pay interest on the principal amount of this Security at the Interest Rate
from September 28, 2000 until repayment at Maturity, redemption or repurchase.
The Company will pay interest on this Security semiannually in arrears on April
1 and October 1 of each year (each an "Interest Payment Date"), commencing April
1, 2001.

Interest on the Securities shall be computed (i) for any full semiannual period
for which a particular Interest Rate is applicable on the basis of a 360-day
year of twelve 30-day months and (ii) for any period for which a particular
Interest Rate is applicable shorter than a full semiannual period for which
interest is calculated, on the basis of a 30-day month and, for such periods of
less than a month, the actual number of days elapsed over a 30- day month.

A Holder of any Security at the close of business on a Regular Record Date shall
be entitled to receive interest (including Additional Amounts, if any) on such
Security on the corresponding Interest Payment Date. A Holder of any Security
which is converted after the close of business on a Regular Record Date and
prior to the corresponding Interest Payment Date (other than any Security whose
Maturity is prior to such Interest Payment Date) shall be entitled to receive
interest (including Additional Amounts, if any) on the principal amount of such
Security, notwithstanding the conversion of such Security prior to such Interest
Payment Date. However, any such Holder which surrenders any such Security for
conversion during the period between the close of business on such Regular
Record Date and ending with the opening of business on the corresponding
Interest Payment Date shall be required to pay the Company an amount equal to
the interest (including Additional Amounts, if any) on the principal amount of
such Security so converted, which is payable by the Company to such Holder on
such Interest Payment Date, at the time such Holder surrenders such Security for
conversion. Notwithstanding the foregoing, any such Holder which surrenders for
conversion any Security which has been called for redemption by the Company in a
notice of redemption given by the Company pursuant to Section 10.5 of the
Indenture shall be entitled to receive (and retain) such interest (including
Additional Amounts, if any) and need not pay the Company an amount equal to the
interest on the principal amount of such Security so converted at the time such
Holder surrenders such Security for conversion.

In accordance with the terms of the Registration Rights Agreement, dated
September 28, 2000 (the "Registration Rights Agreement"), between the Company
and Jefferies & Company, Inc., during the first 90 days following a Registration
Default (as defined in the Registration Rights Agreement), the Interest Rate
borne by the Securities shall be increased by 0.25% on:

                                       92
<PAGE>   102

              (A)    December 29, 2000, if the Shelf Registration Statement (as
              defined in the Registration Rights Agreement) is not filed prior
              to or on December 28, 2000;

              (B)    March 29, 2000, if the Shelf Registration Statement is not
              declared effective by the Securities and Exchange Commission prior
              to or on March 28, 2000;

              (C)    the day after the fifth Business Day after the Shelf
              Registration Statement, previously declared effective, ceases to
              be effective or fails to be usable, if a post-effective amendment
              (or report filed pursuant to the Exchange Act) that cures the
              Shelf Registration Statement is not filed with the Securities and
              Exchange Commission during such five Business Day period; or

              (D)    the day following the 45th day of any period that the
              prospectus contained in the Shelf Registration Statement has been
              suspended, if such suspension has not been terminated.

From and after the 91st day following such Registration Default, the Interest
Rate borne by the Securities shall be increased by 0.50%. In no event shall the
Interest Rate borne by the Securities be increased by more than 0.50%.

Any amount of additional interest will be payable in cash semiannually, in
arrears, on each Interest Payment Date and will cease to accrue on the date the
Registration Default is cured. The Holder of this Security is entitled to the
benefits of the Registration Rights Agreement.

2.     Method of Payment.

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.

Principal of, and premium, if any, and interest (including Additional Amounts or
Interest Make-Whole Payment, if any) on, Global Securities will be payable to
the Depositary in immediately available funds.

Principal and premium, if any, on Physical Securities will be payable at the
office or agency of the Company maintained for such purpose, initially the
Corporate Trust Office of the Trustee. Interest (including Additional Amounts or
Interest Make-Whole Payment, if any) on Physical Securities will be payable by
(i) U.S. Dollar check drawn on a bank in the City of New York mailed to the
address of the Person entitled thereto as such address shall appear in the
Register, or (ii) upon application to the Registrar not later than the relevant
Record Date by a Holder of an aggregate principal amount in excess of
$5,000,000, wire transfer in immediately available funds, which application
shall remain in effect until the Holder notifies in writing the Registrar to the
contrary.

3.     Paying Agent and Registrar.

Initially, Bankers Trust Company, the Trustee under the Indenture, will act as
Paying Agent and Registrar. The Company may change the Paying Agent or Registrar
without notice to any Holder.

                                       93
<PAGE>   103

4.     Indenture.

The Company issued this Security under an Indenture, dated as of September 28,
2000 (the "Indenture"), between the Company and Bankers Trust Company, as
trustee (the "Trustee"). The terms of the Security include those stated in the
Indenture and those made part of the Indenture by reference to the Trust
Indenture Act of 1939, as amended ("TIA"). This Security is subject to all such
terms, and Holders are referred to the Indenture and the TIA for a statement of
all such terms. To the extent permitted by applicable law, in the event of any
inconsistency between the terms of this Security and the terms of the Indenture,
the terms of the Indenture shall control.

5.   Optional Redemption.

Provisional Redemption.
This Security may be redeemed in whole or in part, upon not less than 20 nor
more than 60 days' notice, at any time prior to October 1, 2003, at the option
of the Company, at a Redemption Price equal to 103% (expressed as a percentage
of the principal amount), plus interest accrued but unpaid to the Redemption
Date, if the following conditions are satisfied:

              (a)    the Shelf Registration Statement is effective and available
              for use and is expected to remain effective and available for use
              for the 30 days following the Redemption Date; and

              (b)    the Current Market Value of the Company's Common Stock
              equals or exceeds, for at least 20 Trading Days in any period of
              30 consecutive Trading Days (ending on the Trading Day prior to
              the date the notice of redemption is mailed) the Trigger
              Percentage of the Conversion Price then in effect.

Upon any provisional redemption, the Company shall also pay an Interest
Make-Whole Payment in cash or in shares of Common Stock, as described in and
subject to the conditions set forth in the Indenture.

Non-provisional Redemption. This Security may be redeemed in whole or in part,
upon not less than 20 nor more than 60 days' notice, at any time on or after
October 1, 2003, at the option of the Company, at the Redemption Price
(expressed as percentages of the principal amount) of 102% prior to October 1,
2004 and 101% thereafter, plus any interest accrued but unpaid to the Redemption
Date.

General. Securities in original denominations larger than $1,000 may be redeemed
in part. 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 to
be the portion selected for redemption (provided, however, that the Holder of
such Security so converted and deemed redeemed shall not be entitled to any
additional interest payment as a result of such deemed redemption than such
Holder would have otherwise been entitled to receive upon conversion of such
Security). Securities which have been converted during a selection of Securities
to be redeemed may be treated by the Trustee as Outstanding for the purpose of
such selection.

                                       94
<PAGE>   104

On and after the Redemption Date, interest ceases to accrue on Securities or
portions of Securities called for redemption, unless the Company defaults in the
payment of the Redemption Price.

Notice of redemption will be given by the Company to the Holders as provided in
the Indenture.

6.     Repurchase Right Upon a Change of Control.

If a Change in Control occurs, the Holder of Securities, at the Holder's option,
shall have the right, in accordance with the provisions of the Indenture, to
require the Company to repurchase the Securities (or any portion of the
principal amount hereof that is at least an integral multiple of $1,000,
provided that the portion of the principal amount of this Security to be
Outstanding after such repurchase is at least equal to $1,000) at the Repurchase
Price in cash, plus any interest accrued and unpaid to the Repurchase Date.

Subject to the conditions provided in the Indenture, the Company may elect to
pay the Repurchase Price by delivering a number of shares of Common Stock equal
to (i) a Repurchase Price divided by (ii) 95% of the average of the Trading
Prices per share for the five consecutive Trading Days immediately preceding and
including the third Trading Day prior to the Repurchase Date.

No fractional shares of Common Stock will be issued upon repurchase of any
Securities. Instead of any fractional share of Common Stock which would
otherwise be issued upon conversion of such Securities, the Company shall pay a
cash adjustment as provided in the Indenture.

A Company Notice will be given by the Company to the Holders as provided in the
Indenture. To exercise a repurchase Right, a Holder must deliver to the Trustee
a written notice as provided in the Indenture.

7.     Conversion Rights.

Subject to and upon compliance with the provisions of the Indenture, the Holder
of Securities is entitled, at such Holder's option, at any time before the close
of business on the Business Day immediately preceding September 30, 2005, to
convert the Holder's Securities (or any portion of the principal amount hereof
which is an integral multiple of $1,000), at the principal amount thereof or of
such portion, into duly authorized, fully paid and nonassessable shares of
Common Stock of the Company at the Conversion Price in effect at the time of
conversion.

In the case of a Security (or a portion thereof) called for redemption, such
conversion right in respect of the Security (or such portion thereof) so called,
shall expire at the close of business on the second Business Day preceding the
Redemption Date, unless the Company defaults in making the payment due upon
redemption. In the case of a Change of Control for which the Holder exercises
its Repurchase Right with respect to a Security (or a portion thereof), such
conversion right in respect of the Security (or portion thereof) shall expire at
the close of business on the Business Day preceding the Repurchase Date.

The Conversion Price shall be initially equal to $4.75 per share of Common
Stock. The Conversion Price shall be adjusted under certain circumstances as
provided in the Indenture.

                                       95
<PAGE>   105

To exercise the conversion right, the Holder must surrender the Security (or
portion thereof) duly endorsed or assigned to the Company or in blank, at the
office of the Conversion Agent, accompanied by a duly signed conversion notice
to the Company, the Conversion Agent or the Trustee. The Company shall provide
written instructions signed by an officer of the Company to the Conversion Agent
and the Trustee as to how such Security shall be converted in accordance with
this Article 12. Any Security surrendered for conversion during the period from
the close of business on any Regular Record Date to the opening of business on
the corresponding Interest Payment Date (other than any Security whose Maturity
is prior to such Interest Payment Date), shall also be accompanied by payment in
immediately available funds in an amount equal to the interest payable on such
Interest Payment Date on the principal amount of the Securities being
surrendered for conversion.

No fractional shares of Common Stock will be issued upon conversion of any
Securities. Instead of any fractional share of Common Stock which would
otherwise be issued upon conversion of such Securities, the Company shall pay a
cash adjustment as provided in the Indenture.

8.     Subordination.

The Indebtedness evidenced by this Security is, to the extent and in the manner
provided in the Indenture, subordinated and subject in right of payment to the
prior payment in full of all amounts then due on all Senior Debt 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 such Holder's behalf to take such action as may be necessary or appropriate
to effectuate the subordination so provided and (c) appoints the Trustee such
Holder's attorney-in-fact for any and all such purposes.

9.     Denominations; Transfer; Exchange.

The Securities are issuable in registered form, without coupons, in
denominations of $1,000 and integral multiples of $1,000 in excess thereof. A
Holder may register the transfer or exchange of Securities in accordance with
the Indenture. The Registrar may require a Holder, among other things, to
furnish appropriate endorsements and transfer documents and the Company may
require a Holder to pay any taxes and fees required by law or permitted by the
Indenture.

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

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

10.  Persons Deemed Owners.

The registered Holder of this Security shall be treated as its owner for all
purposes.

                                       96
<PAGE>   106

11.    Unclaimed Money.

The Trustee and the Paying Agent shall pay to the Company any money held by them
for the payment of principal, premium, if any, or interest (including Additional
Amounts, if any) that remains unclaimed for two years after the date upon which
such payment shall have become due. After payment to the Company, Holders
entitled to the money must look to the Company for payment as general creditors
unless an applicable abandoned property law designates another Person, and all
liability of the Trustee and such Paying Agent with respect to such money shall
cease.

12.    Discharge Prior to Redemption or Maturity.

Subject to certain conditions contained in the Indenture, the Company may
discharge its obligations under the Securities and the Indenture if (1) (a) all
of the Outstanding Securities shall become due and payable at their scheduled
Maturity within one year or (b) all of the Outstanding Securities are scheduled
for redemption within one year, and (2) the Company shall have deposited with
the Trustee money and/or U.S. Government Obligations sufficient to pay the
principal of, and premium, if any, and interest on, all of the Outstanding
Securities on the date of Maturity or redemption, as the case may be.

13.    Amendment; Supplement; Waiver.

The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the consent of the Holders of a
majority in aggregate principal amount of the Outstanding Securities (or such
lesser amount as shall have acted at a meeting pursuant to the provisions of the
Indenture). The Indenture also contains provisions permitting the Holders of
specified percentages in principal amount of the Securities at the time
Outstanding, on behalf of the Holders of all the Securities, to waive compliance
by the Company with certain provisions of the Indenture and certain past
defaults under the Indenture and their consequences. Any such consent or waiver
by the Holder of this Security shall be conclusive and binding upon such Holder
and upon all future Holders of this Security and of any Security issued upon
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 or
such other Security.

No reference herein to the Indenture and no provision of this Security or of the
Indenture shall alter or impair the obligation of the Company, which is absolute
and unconditional, to pay the principal of and premium, if any, and interest
(including Additional Amounts or Interest Make-Whole Payment, if any) on this
Security at the times, places and rate, and in the coin or currency, herein
prescribed or to convert this Security (or pay cash in lieu of conversion) as
provided in the Indenture.

14.    Defaults and Remedies.

The Indenture provides that an Event of Default with respect to the Securities
occurs when any of the following occurs:

              (a)    the Company defaults in the payment of the principal of or
              premium, if any, on any of the Securities when it becomes due and
              payable at Maturity, upon redemption or exercise of a

                                       97
<PAGE>   107

              Repurchase Right or otherwise, whether or not such payment is
              prohibited by the subordination provisions of Article 13 of the
              Indenture;

              (b)    the Company defaults in the payment of interest (including
              Additional Amounts or Interest Make-Whole Payment, if any) on any
              of the Securities when it becomes due and payable and such default
              continues for a period of 30 days, whether or not such payment is
              prohibited by the subordination provisions of Article 13 of the
              Indenture;

              (c)    the Company fails to perform or observe any other term,
              covenant or agreement contained in the Securities or the Indenture
              and such default continues for a period of 60 days after written
              notice of such failure is given as specified in the Indenture;

              (d)    (i) the Company fails to make any payment by the end of the
              applicable grace period, if any, any payment of principal or
              interest due in respect of any Indebtedness for borrowed money,
              the aggregate outstanding principal amount of which is an amount
              in excess of $5,000,000; or (ii) there is an acceleration of any
              Indebtedness for borrowed money in an amount in excess of
              $5,000,000 because of a default with respect to such Indebtedness
              without such Indebtedness having been discharged or such
              acceleration having been cured, waived, rescinded or annulled, in
              the case of either (i) or (ii) above, for a period of 30 days
              after written notice of such failure is given as specified in the
              Indenture; or

              (e)    there are certain events of bankruptcy, insolvency or
              reorganization of the Company.

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

15.    Authentication.

This Security shall not be valid until the Trustee (or authenticating agent)
executes the certificate of authentication on the other side of this Security.

16.    Abbreviations.

Customary abbreviations may be used in the name of a Holder or an assignee, such
as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN
(= joint tenants with right of survivorship and not as tenants in common), CUST
(= Custodian) and U/G/M/A (= Uniform Gifts to Minors Act).

17.    Additional Rights of Holders of Transfer Restricted Securities.

In addition to the rights provided to Holders under the Indenture, Holders of
Transfer Restricted Securities shall have all the rights set forth in the
Registration Rights Agreement.

18.    CUSIP Numbers.

                                       98
<PAGE>   108

Pursuant to a recommendation promulgated by the Committee on Uniform Security
Identification Procedures, the Company has caused CUSIP numbers to be printed on
this Security and the Trustee may use CUSIP numbers in notices of redemption as
a convenience to Holders. No representation is made as to the accuracy of such
numbers either as printed on this Security or as contained in any notice of
redemption and reliance may be placed only on the other identification numbers
placed thereon.

19.    Governing Law.

The Indenture and this Security shall be governed by, and construed in
accordance with, the law of the State of New York.

20.    Successor Corporation.

In the event a successor corporation assumes all the obligations of the Company
under this Security, pursuant to the terms hereof and of the Indenture, the
Company will be released from all such obligations.

                                       99
<PAGE>   109

                                 ASSIGNMENT FORM

To assign this Security, fill in the form below and have your signature
guaranteed: (I) or (we) assign and transfer this Security to:

(Insert assignee's Soc. Sec. or Tax I.D. No.)

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

and irrevocably appoint ________________________________________________________
to transfer this Security on the books of the Company. The agent may substitute
another to act for him.

Dated:                   Your Name:
      ----------------              -----------------------------------------
                        (Print your name exactly as it appears on the face of
                         this Security)

                         Your Signature:
                                        -------------------------------------
                        (Sign exactly as your name appears on the face of this
                         Security)

                         Signature Guarantee*:
                                              -------------------------------

* Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

In connection with any transfer of this Security occurring prior to the date
which is the earlier of the end of the period referred to in Rule 144(k) under
the Securities Act of 1933, as amended (the "Securities Act"), the undersigned
confirms that without utilizing any general solicitation or general advertising
that:

                                  [Check One]

              [ ]    (a) this Security is being transferred in compliance with
              the exemption from registration under the Securities Act provided
              by Rule 144A thereunder, and that the transfer has been effected
              pursuant to and in accordance with Rule 144A under the Securities
              Act and, accordingly, the undersigned does hereby further certify
              that the Securities are being transferred to a transferee that the
              undersigned reasonably believes is purchasing the Securities for
              its own account, or for one or more accounts with respect to which
              such transferee exercises sole investment discretion, and such
              transferee and each such account is a "qualified institutional
              buyer" within the meaning of Rule 144A, in each case in a
              transaction meeting the requirements of Rule 144A and in
              accordance with any applicable securities laws of any state of the
              United States.

              or

              [ ]    (b) this Security is being transferred other than in
              accordance with (a) above and documents are being furnished which
              comply with the conditions of transfer set forth in this Security
              and the Indenture.

                                      100
<PAGE>   110

If none of the foregoing boxes is checked, the Trustee or other Registrar shall
not be obligated to register this Security in the name of any Person other than
the Holder hereof unless the conditions to any such transfer of registration set
forth herein and in Sections 2.7, 2.8 and 2.9 of the Indenture shall have been
satisfied.

Dated:
      ----------            ----------------------------------------------------
                            NOTICE: The signature to this assignment must
                            correspond with the name as written upon the face of
                            the within-mentioned instrument in every particular,
                            without alteration or any change whatsoever.

                            Signature Guarantee:
                                                --------------------------------

                            Signature must be guaranteed by a participant
                            in a recognized signature guaranty medallion
                            program or other signature guarantor acceptable
                            to the Trustee.

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

The undersigned represents and warrants that: (a) it is purchasing this Security
for its own account or an account with respect to which it exercises sole
investment discretion, in each case for investment and not with a view to
distribution; (b) it and any such account is a "Qualified Institutional Buyer"
within the meaning of Rule 144A under the Securities Act of 1933; (c) it is
aware that the sale to it is being made in reliance on Rule 144A; (d) it
acknowledges that it has received such information regarding the Company as the
undersigned has requested pursuant to Rule 144A or has determined not to request
such information; and (e) it is aware that the transferor is relying upon the
undersigned's foregoing representations in order to claim the exemption from
registration provided by Rule 144A.

Dated:
      ----------            ----------------------------------------------------
                            NOTICE: To be executed by an executive officer

                                      101
<PAGE>   111

                                CONVERSION NOTICE

TO:  ONLINE RESOURCES CORPORATION
7600 Colshire Drive
McLean, Virginia 22102

The undersigned registered owner of this Security hereby irrevocably exercises
the option to convert this Security, or the portion hereof (the principal amount
of which is an integral multiple of $1,000) below designated, into shares of
Common Stock in accordance with the terms of the Indenture referred to in this
Security, and directs that the shares issuable and deliverable upon such
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 shares or any portion of this Security not converted are to
be issued in the name of a person other than the undersigned, the undersigned
will pay all transfer taxes payable with respect thereto. Any amount required to
be paid to the undersigned on account of interest (including Additional Amounts,
if any) accompanies this Security.

Dated:                   Your Name:
      ----------------              --------------------------------------------
                        (Print your name exactly as it appears on the face of
                         this Security)

                         Your Signature:
                                        ----------------------------------------
                        (Sign exactly as your name appears on the face of this
                         Security)

                         Signature Guarantee*:
                                              ----------------------------------

                         Social Security or other
                         Taxpayer Identification Number:
                                                         -----------------------

Principal amount to be converted (if less than all): $
                                                       -------------------------

* Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

Fill in for registration of shares (if to be issued) and Securities (if to be
delivered) other than to and in the name of the registered holder:

                     -----------------------------
                     (Name)

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

                     -----------------------------
                     (City, State and Zip Code)

                                      102
<PAGE>   112

                     NOTICE OF EXERCISE OF REPURCHASE RIGHT

TO:  Online Resources Corporation
7600 Colshire Drive
McLean, Virginia  22102

The undersigned registered owner of this Security hereby irrevocably
acknowledges receipt of a notice from Online Resources Corporation (the
"Company") as to the occurrence of a Change of Control with respect to the
Company and requests and instructs the Company to repay the entire principal
amount of this Security, or the portion thereof (the principal amount of which
is an integral multiple of $1,000) below designated, in accordance with the
terms of the Indenture referred to in this Security, together with interest
(including Additional Amounts, if any) accrued and unpaid to, but excluding,
such date, to the registered holder hereof, in cash.

Dated:                   Your Name:
      ----------------              --------------------------------------------
                        (Print your name exactly as it appears on the face of
                         this Security)

                         Your Signature:
                                        ----------------------------------------
                        (Sign exactly as your name appears on the face of this
                         Security)

                         Signature Guarantee*:
                                              ----------------------------------

                         Social Security or other
                         Taxpayer Identification Number:
                                                         -----------------------

                         Principal amount to be repaid
                        (if less than all): $
                                                       -------------------------

* Participant in a recognized Signature Guarantee Medallion Program (or other
signature guarantor acceptable to the Trustee).

                                      103
<PAGE>   113

                SCHEDULE OF EXCHANGES FOR PHYSICAL SECURITIES/1/

The following exchanges of a part of this Global Security for Physical
Securities have been made:

<TABLE>
<CAPTION>
                                                                                 Principal Amount of this
                     Amount of decrease in          Amount of increase in        Global Security                  Signature of
                     Principal Amount of            Principal Amount of          following such decrease          Authorized officer
Date of Exchange     this Global Security           this Global Security         (or increase)                    of Trustee
                     --------------------           --------------------         -------------                    ----------
<S>                  <C>                            <C>                          <C>                              <C>
</TABLE>

/1/ This schedule should be included only if the Security is issued in global
form.

                                      104
<PAGE>   114

                                    EXHIBIT B

                    FORM OF INVESTMENT REPRESENTATION LETTER

                       (ACCREDITED INVESTOR CERTIFICATES)

Bankers Trust Company, as Trustee
4 Albany Street
New York, NY  10006
Attention:   Dorothy Robinson

Re: 8.0% Convertible Subordinated Notes due 2005 of Online Resources Corporation
(CUSIP Nos. ____ and ______) (the "Securities")

Ladies and Gentlemen:

       Reference is hereby made to the Indenture dated as of September 28, 2000
(the "Indenture") between Online Resources Corporation, a Delaware corporation
(the "Company"), and Bankers Trust Company, as Trustee (the "Trustee").
Capitalized terms used but not defined herein shall have the meanings given them
in the Indenture.

       In connection with the proposed purchase by the undersigned purchaser of
$ aggregate principal amount of the Convertible Notes, which are convertible
into shares of common stock ("Common Stock" and, together with the Convertible
Notes, the "Securities") of the Company, the purchaser acknowledges, represents,
agrees and confirms that:

       (1)    it is acquiring the Convertible Notes for its own account or for
       one or more accounts as to each of which the purchaser exercises sole
       investment discretion (and for each of which the purchaser is acquiring
       Convertible Notes having an aggregate principal amount of not less than
       U.S.$250,000 or its equivalent). The purchaser and any account for which
       the purchaser is acquiring the Convertible Note are either (check one)
       ___ (A) "Qualified Institutional Buyers" (as defined in Rule 144A under
       the Securities Act) or ___ (B) an "accredited investor" as defined in
       Rule 501 under the Securities Act (an "Accredited Investor") that is
       acquiring the securities in definitive form. The purchaser has such
       knowledge and experience in financial and business matters as to be
       capable of evaluating the merits and risks of its investment in the
       Convertible Notes, and the purchaser and any accounts for which it is
       acting are each able to bear the economic risks of such investment;

       (2)    it understands and acknowledges that the Securities have not been
       registered under the Securities Act or any other applicable securities
       laws, and may not be offered or sold within the United States or to, or
       for the account or benefit of, U.S. persons except as set forth below.
       The purchaser is purchasing the Convertible Notes for investment and not
       with any present agreement, plan or intent to transfer the Convertible
       Notes or otherwise with any view to resale or distribution (other than
       any resale of the Securities in accordance with Rule 144A or pursuant to

                                      105
<PAGE>   115

       the Registration Rights Agreement);

       (3)    it acknowledges that neither the Company nor the Placement Agent
       or any person representing the Company or the Placement Agent has made
       any representation to it with respect to the Company or the offering and
       sale of the Convertible Notes. It has had access to such financial and
       other information concerning the Company and the Convertible Notes as it
       deemed necessary in connection with its decision to purchase any of the
       Convertible Notes,

       (4)    it agrees that if it should reoffer, resell, pledge or otherwise
       transfer the Securities, it will do so only in compliance with the
       Securities Act and any applicable state securities laws and only:

              (a)    to the Company or any of its subsidiaries,

              (b)    to a QIB in compliance with Rule 144A under the Securities
              Act,

              (c)    outside the United States in compliance with Rule 904 under
              the Securities Act,

              (d)    pursuant to an exemption from registration under the
       Securities Act to an "accredited investor" (as defined in Rule 501 under
       the Securities Act) that is purchasing Convertible Notes in an aggregate
       principal amount of at least $250,000 (or a number of shares of common
       stock at least equal to $250,000 divided by the initial conversion price
       set forth on the cover page of the Offering Memorandum dated September
       25, 2000 relating to the Convertible Notes (the "Offering Memorandum"))
       and (i) (A) in the case of the Convertible Notes, evidenced by a
       definitive certificated note in registered form or (B) in the case of
       common stock, evidenced by a definitive share certificate, in each case
       transferable only upon delivery to the Company and the trustee of a
       Transferee Letter described in (ii) and (ii) prior to such transfer, the
       transferee furnishes to the Company and the trustee (or transfer agent,
       as the case may be) a signed letter setting forth representations and
       warranties equivalent to those set forth in this letter,

              (e)    pursuant to the exemption from registration provided by
       Rule 144 under the Securities Act, if available, or

              (f)    pursuant to a registration statement that has been declared
       effective under the Securities Act and which continues to be effective at
       the time of such transfer, and

       (5)    it agrees that it will give each person to whom it transfers such
       Securities, other than pursuant to clause (4)(e) or (f) above, notice of
       any restrictions on transfer of such Securities, if then applicable.

       (6)    it understands that the Placement Agent may make a market in the
       Convertible Notes and that, to the extent that the Placement Agent
       acquires any Convertible Note or beneficial interest in any Convertible
       Note, the holders or beneficial owners of such Convertible Note may not
       be able to rely upon Rule 144 under the Securities Act for resales.
       Therefore, the legend set forth in Paragraph 10 below may be required on
       the Convertible Notes as long as the Convertible Notes remain
       outstanding;

                                      106
<PAGE>   116

       (7)    The purchaser acknowledges and represents that its purchase and
       ownership of the Convertible Notes will not constitute a prohibited
       transaction under the Employee Retirement Income Security Act of 1974, as
       amended ("ERISA") or the Internal Revenue Code of 1986, as amended (the
       "Code"); and

       (8)    The purchaser acknowledges that the Company, the Placement Agent
       and others will rely upon the truth and accuracy of the foregoing
       acknowledgments, representations and agreements and agrees that, if any
       of the acknowledgements, representations or agreements deemed to have
       been made by it by its purchase of the Convertible Notes are no longer
       accurate, it shall promptly notify the Company and the Placement Agent.
       If the purchaser is acquiring any Convertible Notes as a fiduciary or
       agent for one or more investor accounts, it represents that it has sole
       investment discretion with respect to each such account and that it has
       full power to make the foregoing acknowledgments, representations and
       warranties on behalf of each such account.

       (9)    If a transfer of the Securities is to be made within two years
       after the last original issuance of the Convertible Notes pursuant to
       clause (4)(c), (d) or (e) above, the holder or the beneficial holder must
       furnish to the Company and the trustee or, in the case of the common
       stock, the transfer agent for the common stock such certifications, legal
       opinions or other information as the Company may reasonably require to
       confirm that the proposed transfer is being made pursuant to an exemption
       from registration under the Securities Act or in a transaction not
       subject to the Securities Act.

       (10)   Each certificate representing a Convertible Note will bear the
       following legend, unless such Convertible Notes have been transferred
       pursuant to a registration statement that has been declared effective
       under the Securities Act:

       THE SECURITY EVIDENCED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER
       THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR ANY
       STATE SECURITIES LAWS AND MAY NOT BE REOFFERED, RESOLD, PLEDGED OR
       OTHERWISE TRANSFERRED EXCEPT AS PERMITTED BY THE FOLLOWING SENTENCES. THE
       HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS CONVERTIBLE NOTE REPRESENTS,
       ACKNOWLEDGES AND AGREES THAT IT WILL NOT REOFFER, RESELL, PLEDGE OR
       OTHERWISE TRANSFER THIS SECURITY OR THE COMMON STOCK ISSUABLE UPON
       CONVERSION OF THIS SECURITY EXCEPT IN COMPLIANCE WITH THE SECURITIES ACT
       AND IN ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES LAWS AND ONLY: (A)
       TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
       INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES
       ACT, (C) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
       SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED
       BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (E) TO AN
       "ACCREDITED INVESTOR" AS DEFINED IN RULE 501 UNDER THE SECURITIES ACT (AN
       "ACCREDITED INVESTOR") THAT IS ACQUIRING THE SECURITIES FOR ITS OWN
       ACCOUNT OR FOR THE ACCOUNT OF ONE OR MORE OTHER ACCREDITED INVESTORS OVER
       WHICH IT EXERCISES SOLE INVESTMENT DISCRETION THAT IS PURCHASING
       SECURITIES

                                      107
<PAGE>   117

       IN DEFINITIVE FORM AND THAT PRIOR TO SUCH TRANSFER, DELIVERS A SIGNED
       LETTER TO THE COMPANY AND THE TRUSTEE (OR THE TRANSFER AGENT IN THE CASE
       OF COMMON STOCK ISSUABLE UPON CONVERSION THEREOF) CERTIFYING THAT IT AND
       EACH SUCH ACCOUNT IS SUCH AN ACCREDITED INVESTOR AND IS ACQUIRING THE
       SECURITIES OR THE COMMON STOCK ISSUABLE UPON CONVERSION THEREOF FOR
       INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION AND AGREEING TO THE
       RESTRICTIONS ON TRANSFER OF THE SECURITIES OR THE COMMON STOCK ISSUABLE
       UPON CONVERSION THEREOF OR (F) PURSUANT TO A REGISTRATION STATEMENT WHICH
       HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT AND WHICH CONTINUES
       TO BE EFFECTIVE AT THE TIME OF SUCH TRANSFER. THE HOLDER HEREOF AGREES
       THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY EVIDENCED HEREBY
       IS TRANSFERRED (OTHER THAN A TRANSFER PURSUANT TO CLAUSE (F) OF THE
       FOREGOING SENTENCE) A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

       IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) or (E) ABOVE, THE
       HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE
       TRUSTEE (OR ANY SUCCESSOR TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS,
       LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY REQUIRE
       TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION
       FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
       OF THE SECURITIES ACT. THIS LEGEND WILL BE REMOVED UPON THE EARLIER OF
       THE TRANSFER OF THE SECURITY EVIDENCED HEREBY PURSUANT TO CLAUSE (F)
       ABOVE.

       Each stock certificate representing common stock issued upon conversion
       of the Convertible Notes will bear the following legend (unless such
       common stock has been sold pursuant to a registration statement that has
       been declared effective under the Securities Act):

       THE SECURITY EVIDENCED BY THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER
       THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR ANY
       STATE SECURITIES LAWS AND MAY NOT BE REOFFERED, RESOLD, PLEDGED OR
       OTHERWISE TRANSFERRED EXCEPT AS PERMITTED BY THE FOLLOWING SENTENCES. THE
       HOLDER HEREOF, BY ITS ACCEPTANCE OF THIS SECURITY REPRESENTS,
       ACKNOWLEDGES AND AGREES THAT IT WILL NOT REOFFER, RESELL, PLEDGE OR
       OTHERWISE TRANSFER THIS SECURITY EXCEPT IN COMPLIANCE WITH THE SECURITIES
       ACT AND IN ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES LAWS AND ONLY:
       (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
       INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES
       ACT, (C) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
       SECURITIES ACT, (D) PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED
       BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), (E) TO AN
       "ACCREDITED INVESTOR" AS DEFINED IN RULE 501 UNDER THE SECURITIES ACT (AN
       "ACCREDITED INVESTOR") THAT IS ACQUIRING THE SECURITIES FOR ITS OWN

                                      108
<PAGE>   118

       ACCOUNT OR FOR THE ACCOUNT OF ONE OR MORE OTHER ACCREDITED INVESTORS OVER
       WHICH IT EXERCISES SOLE INVESTMENT DISCRETION THAT IS PURCHASING
       SECURITIES IN DEFINITIVE FORM AND THAT PRIOR TO SUCH TRANSFER, DELIVERS A
       SIGNED LETTER TO THE COMPANY AND THE TRUSTEE (OR THE TRANSFER AGENT IN
       THE CASE OF COMMON STOCK ISSUABLE UPON CONVERSION THEREOF) CERTIFYING
       THAT IT AND EACH SUCH ACCOUNT IS SUCH AN ACCREDITED INVESTOR AND IS
       ACQUIRING THE SECURITIES OR THE COMMON STOCK ISSUABLE UPON CONVERSION
       THEREOF FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION AND AGREEING TO
       THE RESTRICTIONS ON TRANSFER OF THE SECURITIES OR THE COMMON STOCK
       ISSUABLE UPON CONVERSION THEREOF OR (F) PURSUANT TO A REGISTRATION
       STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT AND
       WHICH CONTINUES TO BE EFFECTIVE AT THE TIME OF SUCH TRANSFER. THE HOLDER
       HEREOF AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE SECURITY
       EVIDENCED HEREBY IS TRANSFERRED (OTHER THAN A TRANSFER PURSUANT TO CLAUSE
       (F) OF THE FOREGOING SENTENCE) A NOTICE SUBSTANTIALLY TO THE EFFECT OF
       THIS LEGEND.

       IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) or (E) ABOVE, THE
       HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE
       TRUSTEE (OR ANY SUCCESSOR TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS,
       LEGAL OPINIONS OR OTHER INFORMATION AS THE COMPANY MAY REASONABLY REQUIRE
       TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION
       FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
       OF THE SECURITIES ACT

                                      109
<PAGE>   119

                                       Very truly yours,
                                                        ------------------------
                                       (Name of Purchaser)

                                       By:
                                          --------------------------------------

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

cc:    Online Resources Corporation
       Attn:  Carl Blandino
       7600 Colshire Drive
       McLean, Virginia  22102<PAGE>   1
Exhibit 4.2

                        Registration Rights Agreement

                                   between

                         ONLINE RESOURCES CORPORATION

                                     and

                          JEFFERIES & COMPANY. INC.

                        DATED AS OF SEPTEMBER 28, 2000

<PAGE>   2

                  REGISTRATION RIGHTS AGREEMENT, dated as of September 28,
2000 between Online Resources Corporation, a Delaware corporation (together
with any successor entity, herein referred to as the "Company"), and Jefferies
& Company, Inc. (the "Placement Agent").

                  Pursuant to the Placement Agreement, dated September 25,
2000, between the Company and the Placement Agent (the "Placement Agreement"),
the Placement Agent has agreed to act as exclusive placement agent for the
Company for up to $20,000,000 in aggregate principal amount of the Company's
8.0% Convertible Subordinated Notes due 2005 (the "Securities"). The
Securities will be convertible into fully paid, nonassessable shares of common
stock, par value $0.01 per share, of the Company (the "Common Stock") on the
terms, and subject to the conditions, set forth in the Indenture (as defined
herein). The Company has agreed to provide the registration rights set forth
in this Agreement pursuant to Section 5(l) of the Placement Agreement.

                  The parties hereby agree as follows:

                  1.       Definitions.  Capitalized terms used herein without
definition shall have the respective meanings set forth in the Placement
Agreement.  As used in this Agreement, the following capitalized terms shall
have the following meanings:

                  "Act" means the Securities Act of 1933, as amended, and the
rules and regulations of the SEC promulgated thereunder.

                  "Additional Amounts" has the meaning set forth in Section
2(e) hereof.

                  "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" (including, with correlative meanings, the terms
"controlling", "controlled by" and "under common control with"), as used with
respect to any person, shall mean the possession, directly or indirectly, of
the power to direct or cause the direction of the management or policies of
such person, whether through the ownership of voting securities or by
agreement or otherwise.

                  "Business Day" has the meaning set forth in the Indenture.

                  "Closing Date" means September 28, 2000.

                  "Common Stock" means the common stock, par value $0.0001 per
share, of the Company, as it exists on the date of this Agreement and any
other shares of capital stock or other securities of the Company into which
such Common Stock may be reclassified or changed, together with any and all
other securities which may from time to time be issuable upon conversion of
Securities.

                  "Damages Payment Date" means, with respect to the Securities
or the Common Stock issuable upon conversion thereof, as applicable, each
Interest Payment Date and in the event that any Security, or portion thereof,
is called for redemption or surrendered for purchase by the Company in
accordance with the terms of the Indenture, the relevant Redemption Date or

<PAGE>   3

Repurchase Date (as both terms are defined in the Indenture), as the case may
be, shall also be a Damages Payment Date with respect to such Security, or
portion thereof, unless the Indenture provides that accrued and unpaid
interest on the Security (or portion thereof) to be redeemed or repurchased,
as the case may be, is to be paid to the person who was the Holder thereof on
a record date prior to such Redemption Date or Repurchase Date, as the case
may be, in which case the Damages Payment Date shall be the date on which
interest is payable to such Record Holder.

                  "Default Rate" means one-quarter of one percent (25 basis
points) per annum per $1,000 principal amount of Securities and $2.50 per
annum per 210.5 shares of Common Stock (subject to the same adjustments to the
"Conversion Price", as specified in the Indenture) constituting Transfer
Restricted Securities for the first 90 days during which a Registration
Default has occurred and is continuing and one-half of one percent (50 basis
points) per annum per $1,000 principal amount of Securities and $5.00 per
annum per 210.5 shares of Common Stock (subject to adjustment as set forth
above) constituting Transfer Restricted Securities for any additional days
during which a Registration Default has occurred and is continuing.

                  "DTC" has the meaning set forth in Section 3(k) hereof.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended, and the rules and regulations of the SEC promulgated thereunder.

                  "Final Maturity Date" means September 30, 2005.

                  "Holder" means a person who is a holder or beneficial owner
(including the Placement Agent) of any Securities or shares of Common Stock
issued upon conversion of Securities; provided that, unless otherwise
expressly stated herein, only registered holders of Securities or Common Stock
issued on conversion thereof shall be counted for purposes of calculating any
proportion of holders entitled to take any action or give notice pursuant to
this Agreement.

                  "Indenture" means the Indenture relating to the Securities
dated as of September 28, 2000, between the Company and Bankers Trust Company,
as trustee, as the same may be amended from time to time in accordance with
the terms thereof.

                  "Initial Placement" means the placement of the Securities by
the Placement Agent pursuant to the Placement Agreement.

                  "Interest Payment Date" shall mean each October 1 and April
1, commencing April 1, 2000 and ending on the Final Maturity Date.

                  "Majority Holders" means the Holders of a majority of the
then outstanding aggregate principal amount of Securities registered under a
Shelf Registration Statement; provided, that Holders of Common Stock issued
upon conversion of Securities shall be deemed to be Holders of the aggregate
principal amount of Securities from which such Common Stock was converted; and
provided, further, that Securities or Common Stock which have been sold or
otherwise transferred pursuant to the Shelf Registration Statement shall not
be included in the calculation of Majority Holders.

                                      2

<PAGE>   4

                  "Majority Underwriting Holders" means, with respect to any
Underwritten Offering, the Holders of a majority of the then outstanding
aggregate principal amount of Securities registered under any Shelf
Registration Statement whose Securities are or are to be included in such
Underwritten Offering; provided, that Holders of Common Stock issued upon
conversion of Securities whose shares of Common Stock are or are to be
included in such Underwritten Offering shall be deemed to be Holders of the
aggregate principal amount of Securities from which such Common Stock was
converted.

                  "Managing Underwriters" means the Underwriter or
Underwriters that shall manage an Underwritten Offering.

                  "NASD" has the meaning set forth in Section 3(i) hereof.

                  "Notice and Questionnaire" means a Notice of Registration
Statement and Selling Securityholder Questionnaire substantially in the form
of Exhibit A hereto.

                  "Offering Memorandum" means the Final Memorandum as defined
in the Placement Agreement.

                  "Person" and "person" have the meaning set forth in the
Indenture.

                  "Placement Agent" has the meaning set forth in the preamble
hereto.

                  "Placement Agreement" has the meaning set forth in the
preamble hereto.

                  "Prospectus" means the prospectus included in any Shelf
Registration Statement (including, without limitation, a prospectus that
discloses information previously omitted from a prospectus filed as part of an
effective registration statement in reliance upon Rule 430A under the Act), as
amended or supplemented by any prospectus supplement, with respect to the
terms of the offering of any portion of the Securities or Common Stock
issuable upon conversion thereof covered by such Shelf Registration Statement,
and all amendments and supplements to such prospectus, including all documents
incorporated by reference in such prospectus.

                  "Record Holder" means (i) with respect to any Damages
Payment Date, each person who is registered on the books of the registrar as
the holder of Securities at the close of business on the record date with
respect to such Damages Payment Date and (ii) with respect to any Damages
Payment Date relating to the Common Stock issued upon conversion thereof, each
person who is a holder of record of such Common Stock fifteen days prior to
the Damages Payment Date.

                  "Registration Default" has the meaning set forth in Section
2(e) hereof.

                  "Rule 144" means Rule 144 (or any successor provision) under
the Act.

                  "SEC" means the Securities and Exchange Commission.

                  "Securities" has the meaning set forth in the preamble
hereto.

                                      3

<PAGE>   5

                  "Shelf Registration" means a registration effected pursuant
to Section 2 hereof.

                  "Shelf Registration Period" has the meaning set forth in
Section 2(c) hereof.

                  "Shelf Registration Statement" means a "shelf" registration
statement of the Company pursuant to the provisions of Section 2 hereof which
covers all of the Securities and the Common Stock issuable upon conversion
thereof, as applicable, on Form S-3 or on another appropriate form for an
offering to be made on a delayed or continuous basis pursuant to Rule 415
under the Act, or any similar rule that may be adopted by the SEC, and all
amendments and supplements to such registration statement, including
post-effective amendments, in each case including the Prospectus contained
therein, all exhibits thereto and all documents incorporated by reference
therein.

                  "Suspension Period" has the meaning set forth in Section
2(d) hereof.

                  "Transfer Restricted Securities" means each Security and
each share of Common Stock issued upon conversion thereof until the earlier of
(A) the date on which such Security or share of Common Stock, as the case may
be, (i) has been transferred pursuant to the Shelf Registration Statement or
another registration statement covering such Security or share of Common Stock
which has been filed with the SEC pursuant to the Act, in either case after
such registration statement has become effective and while such registration
statement is effective under the Act, (ii) has been transferred pursuant to
Rule 144 under the Act (or any similar provision then in force) or (iii) may
be sold or transferred pursuant to Rule 144(k) under the Act (or any similar
provision then in force) or (B) the second anniversary of the Closing Date.

                  "Trustee" means the trustee with respect to the Securities
under the Indenture.

                  "Underwriter" means any underwriter of or placement agent
for Securities or Common Stock issuable upon conversion thereof in connection
with an offering thereof under a Shelf Registration Statement.

                  "Underwritten Offering" means an offering in which the
Securities or Common Stock issued upon conversion thereof are sold to an
Underwriter or with the assistance of an Underwriter for reoffering to the
public.

                  All references in this Agreement to financial statements and
schedules and other information which is "contained," "included" or "stated"
in the Shelf Registration Statement, any preliminary Prospectus or Prospectus
(and all other references of like import) shall be deemed to mean and include
all such financial statements and schedules and other information which is
incorporated by reference in such Shelf Registration Statement, preliminary
Prospectus or Prospectus, as the case may be; and all references in this
Agreement to amendments or supplements to the Shelf Registration Statement,
any preliminary Prospectus or Prospectus shall be deemed to mean and include
the filing of any document under the Exchange Act, after the date of such
Shelf Registration Statement, preliminary Prospectus or Prospectus, as the
case may be, which is incorporated by reference therein.

                                      4

<PAGE>   6

                  2.       Shelf Registration Statement.

                  (a)      The Company shall prepare and, not later than 90
days following the Closing Date, shall file with the SEC a Shelf Registration
Statement with respect to resales of the Securities and the Common Stock
issuable upon conversion thereof by the Holders from time to time in
accordance with the methods of distribution elected by such Holders and set
forth in such Shelf Registration Statement and thereafter shall use its
reasonable best efforts to cause such Shelf Registration Statement to be
declared effective under the Act within 180 days after the Closing Date. The
Company shall supplement or amend the Shelf Registration Statement if required
by the rules, regulations or instructions applicable to the registration form
used by the Company for the Shelf Registration Statement, if required by the
Act, the Exchange Act or the SEC.

                  (b)      (1)      Not less than 10 calendar days prior to
the effectiveness of the Shelf Registration Statement, the Company shall mail
the Notice and Questionnaire to the Holders of Securities and Common Stock
issued upon conversion thereof. No Holder shall be entitled to be named as a
selling securityholder in the Shelf Registration Statement, and no Holder
shall be entitled to use the Prospectus forming a part thereof for resales of
Securities or Common Stock issued upon conversion thereof at any time, unless
such Holder has returned a completed and signed Notice and Questionnaire to
the Company by the deadline for responses set forth therein; provided,
however, that Holders of Securities or Common Stock issued upon conversion
thereof shall have at least 7 calendar days from the date on which the Notice
and Questionnaire is first mailed to such Holders to return a completed and
signed Notice and Questionnaire to the Company.

                           (2)      After the Shelf Registration Statement has
become effective, the Company shall, upon the request of any Holder of
Securities or Common Stock issued or issuable upon conversion thereof that has
not returned a completed Notice and Questionnaire, promptly send a Notice and
Questionnaire to such Holder. The Company shall not be required to take any
action to name such Holder as a selling securityholder in the Shelf
Registration Statement or to enable such Holder to use the Prospectus forming
a part thereof for resales of Securities or Common Stock issued or issuable
upon conversion thereof until such Holder has returned a completed and signed
Notice and Questionnaire to the Company, whereupon the Company will be
required to take such action.

                  (c)      Subject to Section 2(d), the Company shall keep the
Shelf Registration Statement continuously effective under the Act in order to
permit the Prospectus forming part thereof to be usable by all Holders until
the earliest of (i) the second anniversary of the Closing Date (ii) the date
on which all the Securities and Common Stock issued or issuable upon
conversion thereof may be sold by non-Affiliates of the Company pursuant to
paragraph (k) of Rule 144 (or any successor provision) promulgated by the SEC
under the Act, (iii) the date as of which all the Securities and Common Stock
issued or issuable upon conversion thereof have been (A) transferred pursuant
to Rule 144 under the Securities Act (or any similar provision then in force)
or (B) sold pursuant to the Shelf Registration Statement (in any such case,
such period being called the "Shelf Registration Period"). The Company will,
subject to Section 2(d), prepare and file with the SEC such amendments and
post-effective amendments to the Shelf Registration Statement as may be
necessary to keep the Shelf Registration Statement

                                      5

<PAGE>   7

continuously effective for the Shelf Registration Period; subject to Section
2(d), cause the related Prospectus to be supplemented by any required
supplement, and as so supplemented to be filed pursuant to Rule 424 (or any
similar provision then in force) under the Act; and, comply in all material
respects with the provisions of the Act with respect to the disposition of all
securities covered by the Shelf Registration Statement during the applicable
period in accordance with the intended methods of disposition by the sellers
thereof set forth in such Shelf Registration Statement as so amended or such
Prospectus as so supplemented.

                  (d)      The Company may suspend the use of the Prospectus
for a period not to exceed 45 days in any 90-day period (the "Suspension
Period") for valid business reasons, to be determined by the Company in its
sole reasonable judgment (not including avoidance of the Company's obligations
hereunder), including, without limitation, the acquisition or divestiture of
assets, public filings with the SEC, pending corporate developments and
similar events; provided that the Company promptly thereafter complies with
the requirements of Section 3(j) hereof, if applicable; provided, that the
existence of a Suspension Period will not prevent the occurrence of a
Registration Default or otherwise limit the obligation of the Company to pay
Additional Amounts. The Company shall provide notice to the Holders of a
Suspension Period as required under Section 3(c)(1)(iv) hereof.

                  (e)      If (i) the Shelf Registration Statement is not
filed with the SEC on or prior to 90 days after the Closing Date, (ii) the
Shelf Registration Statement has not been declared effective by the SEC within
180 days after the Closing Date or (iii) the Shelf Registration Statement is
filed and declared effective but shall thereafter cease to be effective
(without being succeeded immediately by a replacement shelf registration
statement filed and declared effective) or usable (including as a result of a
Suspension Period) for the offer and sale of Transfer Restricted Securities
for a period of time (including any Suspension Period) which shall exceed 90
days in the aggregate in any twelve-month period during the period beginning
on the Closing Date and ending on the second anniversary of the Closing Date
(each such event referred to in clauses (i) through (iii), a "Registration
Default"), the Company will pay additional amounts ("Additional Amounts") to
each Holder of Transfer Restricted Securities who has complied with such
Holder's obligations under this Agreement. The amount of Additional Amounts
payable during any period in which a Registration Default has occurred and is
continuing is the amount which is equal to one-quarter of one percent (25
basis points) per annum per $1,000 principal amount of Securities and $2.50
per annum per 210.5 shares of Common Stock (subject to the same adjustments to
the "Conversion Price", as specified in the Indenture) constituting Transfer
Restricted Securities for the first 90 days during which a Registration
Default has occurred and is continuing and one-half of one percent (50 basis
points) per annum per $1,000 principal amount of Securities and $5.00 per
annum per 210.5 shares of Common Stock (subject to adjustment as set forth
above) constituting Transfer Restricted Securities for any additional days
during which a Registration Default has occurred and is continuing; it being
understood that all calculations pursuant to this sentence shall be carried
out to five decimals. Following the cure of a Registration Default, Additional
Amounts will cease to accrue with respect to such Registration Default. All
accrued Additional Amounts shall be paid by wire transfer of immediately
available funds to the accounts specified by the Record Holders or, if a
Record Holder has not specified such an account, by check mailed by the
Company to the registered address of such Record Holder on each Damages
Payment Date and Additional Amounts will be calculated on the basis of a
360-day year consisting of twelve 30-day months.

                                      6

<PAGE>   8

In the event that any Additional Amounts are not paid when due, then to the
extent permitted by law, such overdue Additional Amounts, if any, shall bear
interest until paid at the Default Rate, compounded semi-annually. The parties
hereto agree that the Additional Amounts provided for in this Section 2(e)
constitute a reasonable estimate of the damages that may be incurred by
Holders by reason of a Registration Default.

                  (f)      All of the Company's obligations (including,
without limitation, the obligation to pay Additional Amounts) set forth in the
preceding paragraph which are outstanding or exist with respect to any
Transfer Restricted Security at the time such security ceases to be a Transfer
Restricted Security shall survive until such time as all such obligations with
respect to such security shall have been satisfied in full.

                  (g)      Immediately upon the commencement or the
termination of a Registration Default, the Company shall give the Trustee, in
the case of notice with respect to the Securities, and the transfer and paying
agent for the Common Stock, in the case of notice with respect to Common Stock
issued or issuable upon conversion thereof, notice of such commencement or
termination, of the obligation to pay Additional Amounts with regard to the
Securities and Common Stock and the amount thereof and of the event giving
rise to such commencement or termination (such notice to be contained in an
Officers' Certificate (as such term is defined in the Indenture)), and prior
to receipt of such Officers' Certificate the Trustee and such transfer and
paying agent shall be entitled to assume that no such commencement or
termination has occurred, as the case may be.

                  3.       Registration Procedures.  In connection with any
Shelf Registration Statement, the following provisions shall apply:

                  (a)      The Company shall furnish to the Placement Agent,
prior to the filing thereof with the SEC, a copy of any Shelf Registration
Statement, and each amendment thereof, a copy of any Prospectus, and each
amendment or supplement, if any, to the Prospectus included therein (excluding
in all cases amendments caused by the filing by the Company with the SEC of a
report required by the Exchange Act) and shall use its reasonable best efforts
to reflect in each such document, when so filed with the SEC, such comments as
the Placement Agent reasonably may propose. The Placement Agent shall promptly
furnish to the Company any comments it may have to such documents mentioned in
the foregoing sentence.

                  (b)      Subject to Section 2(d), the Company shall ensure
that upon the occurrence of any event that (i) would cause any Shelf
Registration Statement, as amended, and any Prospectus forming part thereof,
as amended or supplemented, not to be in compliance as to form in all material
respects with the Act and the rules and regulations thereunder, (ii) would
cause the Shelf Registration Statement, as amended, when it became effective,
to 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 or (iii) would cause any Prospectus forming part of any Shelf
Registration Statement, as amended or supplemented, to include an untrue
statement of a material fact or omit to state a material fact necessary in
order to make the statements therein, in light of the circumstances under
which they were made, not misleading, the Company shall file promptly an
appropriate amendment to such Shelf Registration Statement or Prospectus, as
the case may be, (A) in the case of clause (i) to place such document in

                                      7

<PAGE>   9

compliance as to form in all material respects, and (B) in the case of clauses
(ii) and (iii) to correct any such misstatements or omissions; provided that
the Company makes no representation or agreement with respect to information
with respect to the Placement Agent, any Underwriter or any Holder required to
be included in any Shelf Registration or Prospectus pursuant to the Act or the
rules and regulations thereunder and which information is included therein in
reliance upon and in conformity with information furnished to the Company in
writing by the Placement Agent, any Underwriter or any such Holder.

                  (c)      (1)          The Company, as promptly as reasonably
practicable, shall advise the Placement Agent and each Holder that has
returned a completed and signed Notice and Questionnaire to the Company and,
if requested by the Placement Agent or any such Holder, confirm such advice in
writing:

                                        (i)     when a Shelf Registration
                  Statement and any amendment thereto has been filed with the
                  SEC and when the Shelf Registration Statement or any
                  post-effective amendment thereto has become effective;

                                        (ii)    of any request by the SEC for
                  amendments or supplements to the Shelf Registration
                  Statement or the Prospectus or for additional information;

                                        (iii)   of the determination by the
                  Company that a post-effective amendment to the Shelf
                  Registration Statement would be appropriate; and

                                        (iv)    of the commencement or
                  termination of any Suspension Period.

                           (2)          The Company shall advise the Placement
Agent and each Holder that has returned a completed and signed Notice and
Questionnaire to the Company and, if requested by the Placement Agent or any
such Holder, confirm such advice in writing:

                                        (i)     of the issuance by the SEC of
                  any stop order suspending the effectiveness of the Shelf
                  Registration Statement or the initiation of any proceedings
                  for that purpose;

                                        (ii)    of the receipt by the Company
                  of any notification with respect to the suspension of the
                  qualification of the Securities included in any Shelf
                  Registration Statement for sale in any jurisdiction or the
                  initiation or threat of any proceeding for such purpose; and

                                        (iii)   of the suspension of the use
                  of the Prospectus pursuant to Section 2(d) hereof or of the
                  happening of any event that requires the making of any
                  changes in the Shelf Registration Statement or the
                  Prospectus so that, as of such date, the statements therein
                  are not misleading and the Shelf Registration Statement or
                  the Prospectus, as the case may be, does not include an
                  untrue statement of a material fact or omit to state a
                  material fact required to be stated therein or necessary to
                  make the statements therein (in the case of the Prospectus,
                  in light of the circumstances under which they were made)
                  not misleading (which

                                      8

<PAGE>   10

                  advice shall be accompanied by an instruction to suspend the
                  use of the Prospectus until the requisite changes have been
                  made).

                  (d)      The Company shall use its reasonable best efforts
to obtain the withdrawal of any order suspending the effectiveness of any
Shelf Registration Statement or the lifting of any suspension of the
qualification (or exemption from qualification) of any of the Securities for
offer or sale in any jurisdiction at the earliest possible time.

                  (e)      The Company shall furnish to each Holder of
Securities and the Common Stock issued upon conversion thereof included within
the coverage of any Shelf Registration Statement, without charge, at least one
copy of such Shelf Registration Statement and any post-effective amendment
thereto, including financial statements and schedules, but excluding exhibits
and documents incorporated by reference unless the Holder so requests in
writing.

                  (f)      The Company shall, during the Shelf Registration
Period, deliver to each Holder of Securities or the Common Stock issued upon
conversion thereof included within the coverage of any Shelf Registration
Statement, without charge, as many copies of the Prospectus (including each
preliminary Prospectus) included in such Shelf Registration Statement and any
amendment or supplement thereto as such Holder may reasonably request but
excluding documents incorporated by reference unless the Holder so requests in
writing; and, except during the continuance of any Suspension Period, the
Company consents to the use of the Prospectus or any amendment or supplement
thereto by each of the selling Holders in connection with the offering and
sale of the Securities or the Common Stock issued upon conversion thereof
covered by the Prospectus or any amendment or supplement thereto.

                  (g)      Prior to any offering of Securities or the Common
Stock issued upon conversion thereof pursuant to any Shelf Registration
Statement, the Company shall register or qualify or cooperate with the Holders
of Securities and the Common Stock issued upon conversion thereof included
therein and their respective counsel in connection with the registration or
qualification (or exemption from such registration or qualification) of such
Securities or Common Stock for offer and sale, as the case may be, under the
securities or blue sky laws of such jurisdictions as any such Holders
reasonably request in writing and do any and all other acts or things
necessary or advisable to enable the offer and sale in such jurisdictions of
the Securities and the Common Stock issued upon conversion thereof covered by
such Shelf Registration Statement; provided, however, that the Company will
not be required to (A) qualify generally to do business in any jurisdiction
where it is not then so qualified or to (B) take any action which would
subject it to general service of process or to taxation in any such
jurisdiction where it is not then so subject.

                  (h)      The Company shall cooperate with the Holders to
facilitate the timely preparation and delivery of certificates representing
Securities or the Common Stock issued upon conversion thereof to be sold
pursuant to any Shelf Registration Statement free of any restrictive legends
and in such denominations and registered in such names as Holders may request
prior to sales of Securities or the Common Stock issued upon conversion
thereof pursuant to such Shelf Registration Statement.

                                      9

<PAGE>   11

                  (i)      Subject to the exceptions contained in (A) and (B)
of subsection (g) hereof and except as may be required solely as a consequence
of the nature of a selling Holder, the Company shall use its reasonable best
efforts to cause the Securities and Common Stock issued upon conversion
thereof covered by the applicable Shelf Registration Statement to be
registered with or approved by such other federal, state and local
governmental agencies or authorities, and self-regulatory organizations in the
United States as may be necessary to enable the Holders to consummate the
disposition of such Securities and Common Stock issued upon conversion thereof
as contemplated by the Shelf Registration Statement; without limitation to the
foregoing, the Company shall make all filings and provide all such information
as may be required by the National Association of Securities Dealers, Inc.
(the "NASD") in connection with the offering under the Shelf Registration
Statement of the Securities and Common Stock issued upon conversion thereof
(including, without limitation, such as may be required by NASD Rule 2710 or
2720), and shall cooperate with each Holder in connection with any filings
required to be made with the NASD by such Holder in that regard.

                  (j)      Upon the occurrence of any event contemplated by
Section 3(c)(2)(iii) above and subject to Section 3(a) hereof, the Company
shall promptly prepare and file with the SEC a post-effective amendment to any
Shelf Registration Statement or an amendment or supplement to the related
Prospectus or any document incorporated therein by reference or file a
document which is incorporated or deemed to be incorporated by reference in
such Shelf Registration Statement or Prospectus, as the case may be, so that,
as thereafter delivered to purchasers of the Securities or the Common Stock
issued upon conversion thereof included therein, the Shelf Registration
Statement and the Prospectus, in each case as then amended or supplemented,
will not include an untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary in order to make the
statements therein (in the case of the Prospectus in light of the
circumstances under which they were made) not misleading and in the case of a
post-effective amendment, use its reasonable best efforts to cause it to
become effective as promptly as practicable; provided, that the Company's
obligations under this Subsection (j) shall be suspended if the Company has
suspended the use of the Prospectus in accordance with Section 2(d) hereof and
given notice of such suspension to Holders, it being understood that the
Company's obligations under this Subsection (j) shall be automatically
reinstated at the end of such Suspension Period.

                  (k)      The Company shall use its reasonable best efforts
to cause The Depository Trust Company ("DTC") on the first Business Day
following the effective date of any Shelf Registration Statement hereunder or
as soon as possible thereafter to remove (i) from any existing CUSIP number
assigned to the Securities any designation indicating that the Securities are
"restricted securities", which efforts shall include delivery to DTC of a
letter executed by the Company substantially in the form of Exhibit B hereto
and (ii) any other stop or restriction on DTC's system with respect to the
Securities. In the event the Company is unable to cause DTC to take actions
described in the immediately preceding sentence, the Company shall take such
actions as the Placement Agent may reasonably request to provide, as soon as
practicable, a CUSIP number for the Securities registered under such Shelf
Registration Statement and to cause such CUSIP number to be assigned to such
Securities (or to the maximum aggregate principal amount of the Securities to
which such number may be assigned). Upon compliance with the foregoing
requirements of this Section 3(k), the Company shall provide the Trustee with
global certificates for such Securities in a form eligible for deposit with
DTC.

                                      10

<PAGE>   12

                  (l)      The Company shall use its reasonable best efforts
to comply with all applicable rules and regulations of the SEC and shall make
generally available to its security holders as soon as practicable but in any
event not later than 15 months after (i) the effective date of the applicable
Shelf Registration Statement, (ii) the effective date of each post-effective
amendment to any Shelf Registration Statement and (iii) the date of each
filing by the Company with the SEC of an Annual Report on Form 10-K that is
incorporated by reference or deemed to be incorporated by reference in the
Shelf Registration Statement, an earnings statement satisfying the provisions
of Section 11(a) of the Securities Act and Rule 158 promulgated by the SEC
thereunder.

                  (m)      The Company shall use its reasonable best efforts
to cause the Indenture to be qualified under the TIA (as defined in the
Indenture) in a timely manner.

                  (n)      The Company shall cause all Common Stock issued or
issuable upon conversion of the Securities to be listed on each securities
exchange or quotation system on which the Common Stock is then listed no later
than the date the applicable Shelf Registration Statement is declared
effective and, in connection therewith, to make such filings as may be
required under the Exchange Act and to have such filings declared effective as
and when required thereunder.

                  (o)      The Company may require each Holder of Securities
or the Common Stock issued upon conversion thereof to be sold pursuant to any
Shelf Registration Statement to furnish to the Company such information
regarding the Holder and the distribution of such Securities or Common Stock
sought by the Notice and Questionnaire and such additional information as may,
from time to time, be required by the Act and the rules and regulations
promulgated thereunder, and the obligations of the Company to any Holder
hereunder shall be expressly conditioned on the compliance of such Holder with
such request.

                  (p)      The Company shall, if reasonably requested, use its
reasonable best efforts to promptly incorporate in a Prospectus supplement or
post-effective amendment to a Shelf Registration Statement (i) such
information as the Majority Holders provide or, if the Securities or Common
Stock are being sold in an Underwritten Offering, as the Managing Underwriters
or the Majority Underwriting Holders reasonably agree should be included
therein and provide to the Company in writing for inclusion in the Shelf
Registration Statement or Prospectus, and (ii) such information as a Holder
may provide from time to time to the Company in writing for inclusion in a
Prospectus or any Shelf Registration Statement concerning such Holder and the
distribution of such Holder's Securities and Common Stock and, in either case,
shall make all required filings of such Prospectus supplement or
post-effective amendment as soon as practicable after being notified in
writing of the matters to be incorporated in such Prospectus supplement or
post-effective amendment, provided that the Company shall not be required to
take any action under this paragraph that is not, in the reasonable opinion of
counsel for the Company, in compliance with applicable law.

                  (q)      The Company shall enter into such customary
agreements (including underwriting agreements) and take all other appropriate
actions as may be reasonably requested in order to expedite or facilitate the
registration or the disposition of the Securities or the Common Stock issued
or issuable upon conversion thereof, and in connection therewith, if an

                                      11

<PAGE>   13

underwriting agreement is entered into, cause the same to contain
indemnification and contribution provisions and procedures no less favorable
than those set forth in Section 5 (or such other reasonable and customary
provisions and procedures acceptable to the Majority Underwriting Holders and
the Managing Underwriters, if any, with respect to all parties to be
indemnified pursuant to Section 5). The plan of distribution in the Shelf
Registration Statement and the Prospectus included therein shall permit
resales of the Securities or Common Stock issuable upon conversion thereof to
be made by selling security holders through underwriters, brokers and dealers,
and shall also include such other information as the Placement Agent may
reasonably request.

                  (r)      The Company shall (i) make reasonably available for
inspection by the Holders of Securities and the Common Stock issued upon
conversion thereof registered or to be registered under a Shelf Registration
Statement, any Underwriter participating in any disposition pursuant to such
Shelf Registration Statement, and any attorney, accountant or other agent
retained by the Holders or any such Underwriter all relevant financial and
other records, pertinent corporate documents and properties of the Company and
its subsidiaries as is customary for due diligence examinations in connection
with public offerings; (ii) cause the Company's officers, directors and
employees to supply all relevant information reasonably requested by the
Holders or any such Underwriter, attorney, accountant or agent in connection
with any such Shelf Registration Statement as is customary for similar due
diligence examinations; provided, however, that any information so delivered
shall be kept confidential by the Holders or any such Underwriter, attorney,
accountant or agent, unless disclosure thereof is made in connection with a
court, administrative or regulatory proceeding or required by law, or such
information has become available to the public generally through the Company
or through a third party without an accompanying obligation of
confidentiality; provided, further, that if the foregoing inspection and
information gathering specified in clauses (i) and (ii) above would, in the
Company's reasonable judgment, disrupt the Company's conduct of business, such
inspections and information gathering shall be coordinated on behalf of the
Holders and the other parties entitled thereto by one counsel designated by or
on behalf of the Majority Holders (or, in the case of an Underwritten
Offering, the Majority Underwriting Holders and the Managing Underwriters);
(iii) make such representations and warranties to the Holders of Securities
and the Common Stock issued upon conversion thereof registered thereunder and
the Underwriters, if any, in form, substance and scope as are customarily made
by issuers to underwriters; (iv) use its reasonable best efforts to obtain
opinions of counsel to the Company and updates thereof (which counsel and
opinions, in form, scope and substance, shall be reasonably satisfactory to
the Managing Underwriters, if any) addressed to each selling Holder and the
Underwriters, if any, covering such matters as are customarily covered in
opinions requested in public offerings; (v) use its reasonable best efforts to
obtain "cold comfort" letters and updates thereof from the independent
certified public accountants of the Company (and, if necessary, any other
independent certified public accountants of any subsidiary of the Company or
of any business acquired by the Company for which financial statements and
financial data are, or are required to be, included in the Shelf Registration
Statement), addressed to each selling Holder of Securities and Common Stock
issued upon conversion thereof registered thereunder (provided such Holder
furnishes the accountants with such representations as the accountants
customarily require in similar situations) and the Underwriters, if any, in
customary form and covering matters of the type customarily covered in "cold
comfort" letters in connection with primary underwritten offerings; and (vi)
deliver such documents and certificates as may be reasonably requested by the

                                      12

<PAGE>   14

Majority Holders or, in the case of an Underwritten Offering, the Majority
Underwriting Holders, and the Managing Underwriters, if any, including those
to evidence compliance with paragraph (j) and with any customary conditions
contained in the underwriting agreement or other agreement entered into by the
Company. The foregoing actions set forth in clauses (iii), (iv), (v) and (vi)
above shall be performed (A) at the reasonable request of the Placement Agent,
at the effectiveness of such Shelf Registration Statement and each
post-effective amendment thereto and (B) at each closing under any
underwriting or similar agreement as and to the extent required thereunder.

                  (s)      Each Holder agrees that, upon receipt of notice of
the happening of an event described in Sections 3(c)(1)(ii) through and
including 3(c)(1)(iv) and Sections 3(c)(2)(i) through and including
3(c)(2)(iii), each Holder shall forthwith discontinue (and shall cause its
agents and representatives to discontinue) disposition of the Securities and
the Common Stock issuable upon conversion thereof and will not resume
disposition of such Securities or the Common Stock until such Holder has
received copies of an amended or supplemented Prospectus contemplated by
Section 3(j) hereof, or until such Holder is advised in writing by the Company
that the use of the Prospectus may be resumed or that the relevant Suspension
Period has been terminated, as the case may be, provided that, the foregoing
shall not prevent the sale, transfer or other disposition of Securities or
Common Stock issuable upon conversion thereof by a Holder in a transaction
which is exempt from, or not subject to, the registration requirements of the
Act, so long as such Holder does not and is not required to deliver the
applicable Prospectus or Shelf Registration Statement in connection with such
sale, transfer or other disposition, as the case may be; and provided,
further, that the provisions of this paragraph shall not prevent the
occurrence of a Registration Default or otherwise limit the obligation of the
Company to pay Additional Amounts.

                  (t)      The Company will not be required to pay the costs
and expenses of, or to participate in the marketing or "road show"
presentations of, an Underwritten Offering unless Holders of at least the
Minimum Amount (as defined below) of Securities and/or Common Stock issued or
issuable on conversion thereof have requested that such Securities and/or
shares of Common Stock be included in such an Underwritten Offering. For
purposes of this Agreement, the "Minimum Amount" means 50% of the aggregate
principal amount of Securities originally issued under the Indenture;
provided, that, for purposes of computing the Minimum Amount, Holders of
Common Stock issued upon conversion of Securities shall be deemed to be
holders of the aggregate principal amount of Securities which were converted
into those shares of Common Stock. Only Holders of Securities or shares of
Common Stock issued or issuable upon conversion thereof which are Transfer
Restricted Securities shall be entitled to include such Securities or shares
of Common Stock in an Underwritten Offering and only Transfer Restricted
Securities shall be included in the computation of the Minimum Amount. The
Underwritten Offering initiated by Holders as aforesaid shall include both
Securities and Common Stock if so requested by the Holders. Upon receipt by
the Company from Holders of at least the Minimum Amount of Securities and/or
Common Stock issued or issuable upon conversion thereof of a request for an
Underwritten Offering the Company will, within 10 days thereafter, mail notice
to all Holders of Securities and shares of Common Stock issued upon conversion
thereof stating that: (i) the Company has received a request from the Holders
of the requisite amount of Securities and/or Common Stock issued or issuable
on conversion thereof to effect an Underwritten Offering on behalf of such
Holders; (ii) under the terms of this Agreement, all

                                      13

<PAGE>   15

Holders of Securities and shares of Common Stock issued or issuable upon
conversion thereof which are Transfer Restricted Securities may include their
Securities and shares of Common Stock in such Underwritten Offering, subject
to the terms and conditions set forth in this Agreement and subject to the
right of the Managing Underwriters to reduce, in light of market conditions
and other similar factors, the aggregate principal amount of Securities and
number of shares of Common Stock included in such Underwritten Offering; (iii)
all Holders electing to include Securities or shares of Common Stock in such
Underwritten Offering must notify the Company in writing of such election (the
"Election"), and setting forth an address and facsimile number to which such
written elections may be sent and the deadline (which shall be 12:00 midnight
on the 10th calendar day after such notice is mailed to Holders or, if not a
Business Day, the next succeeding Business Day (the "Deadline")) by which such
elections must be received by the Company; and (iv) setting forth such other
instructions as shall be necessary to enable Holders to include their
Securities and shares of Common Stock in such Underwritten Offering. No Holder
shall be entitled to participate in an Underwritten Offering unless such
Holder notifies the Company of such Election by the Deadline. Notwithstanding
anything to the contrary contained herein, if the Managing Underwriters for an
Underwritten Offering to be effected pursuant to this paragraph advise the
Holders of the Securities and shares of the Common Stock to be included in
such Underwritten Offering that, because of aggregate principal amount of
Securities and/or number of shares of Common Stock that such Holders have
requested be included in the Underwritten Offering, the success of the
offering would likely be materially adversely affected by the inclusion of all
of the Securities and shares of Common Stock requested to be included, then
the principal amount of Securities and the number of shares of Common Stock to
be offered for the accounts of Holders shall be reduced pro rata, according to
the aggregate principal amount of Securities and number of shares of Common
Stock, respectively, requested for inclusion by each such Holder, to the
extent necessary to reduce the size of the offering to the size recommended by
the Managing Underwriter. Notwithstanding anything to the contrary contained
herein, neither the Company nor any Person, other than a Holder of Securities
or shares of Common Stock issued or issuable upon conversion thereof and only
with respect to its Transfer Restricted Securities, shall be entitled to
include any securities in the Underwritten Offering.

                  4.       Registration Expenses. The Company shall bear all
expenses incurred in connection with the performance of its obligations under
Sections 1 and 2 hereof and shall reimburse the Holders for the reasonable
fees and disbursements of one firm or counsel designated by the Majority
Holders or, in the case of an Underwritten Offering, the Majority Underwriter,
to act as counsel for the Holders in connection with the Shelf Registration.
Notwithstanding the provisions of this Section 4, each Holder shall bear the
expense of any broker's commission, agency fee or Underwriter's discount or
commission.

                  5        Indemnification and Contribution.

                  (a)      (i)          The Company agrees to indemnify and
hold harmless the Placement Agent, each Holder of Securities and each Holder
of Common Stock issued upon conversion thereof covered by any Shelf
Registration Statement, the directors, officers, employees and agents of each
such Holder and each person who controls any such Holder within the meaning of
either Section 15 of the Securities Act or Section 20 of the Exchange Act
against any and all losses, claims, damages or liabilities, joint or several,
to which they or any of them may become

                                      14

<PAGE>   16

subject under the Securities Act, the Exchange Act or other Federal or state
law or regulation, at common law or otherwise, insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are
based upon any untrue statement or alleged untrue statement of a material fact
contained in the Shelf Registration Statement as originally filed or in any
amendment thereof, or in any preliminary Prospectus or Prospectus, or in any
amendment thereof 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, in the light of
the circumstances under which they were made, not misleading, and agrees to
reimburse each such indemnified party, as incurred, for any legal or other
expenses reasonably incurred by any of them in connection with investigating
or defending any such loss, claim, damage, liability or action; provided,
however, that the Company will 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
(A) any such untrue statement or alleged untrue statement or omission or
alleged omission made therein in reliance upon and in conformity with written
information furnished to the Company by or on behalf of any such Holder or the
Placement Agent specifically for inclusion therein, (B) use of a Shelf
Registration Statement or the related Prospectus during a period when a stop
order has been issued in respect of such Shelf Registration or any proceedings
for that purpose have been initiated or use of a Prospectus when use of such
Prospectus has been suspended pursuant to Section 2(d) or Section 3(s);
provided, further, in each case, that Holders received prior notice of such
stop order, initiation of proceedings or suspension, or (C) if the Holder
fails to deliver a Prospectus, as then amended or supplemented, provided that
the Company shall have delivered to such Holder such Prospectus, as then
amended or supplemented. This indemnity agreement will be in addition to any
liability which the Company may otherwise have.

                           (ii)         The Company also agrees to indemnify
and to contribute to Losses, as provided in paragraph (d) below, of any
Underwriters of Securities or Common Stock issued upon conversion thereof
registered under a Shelf Registration Statement, their officers and directors
and each person who controls any such Underwriter within the meaning of either
Section 15 of the Act or Section 20 of the Exchange Act on substantially the
same basis as that of the indemnification of the Placement Agent and the
selling Holders provided in this Section 5(a) and shall, if requested by any
Holder, enter into an underwriting agreement reflecting such agreement, as
provided in Section 3(q) hereof. This indemnity agreement will be in addition
to any liability which the Company may otherwise have.

                  (b)      Each Holder of Securities or Common Stock issued
upon conversion thereof covered by a Shelf Registration Statement (including
the Placement Agent) severally and not jointly agrees to indemnify and hold
harmless (i) the Company, (ii) each of its directors, (iii) each of its
officers who signs such Shelf Registration Statement and (iv) each person who
controls the Company within the meaning of either Section 15 of the Securities
Act or Section 20 of the Exchange Act to the same extent as the foregoing
indemnity from the Company to each such Holder, but only with reference to
written information relating to such Holder furnished to the Company by or on
behalf of such Holder specifically for inclusion in the documents referred to
in the foregoing indemnity. This indemnity agreement will be in addition to
any liability which any such Holder may otherwise have.

                                      15

<PAGE>   17

                  (c)      Promptly after receipt by an indemnified party
under this Section of notice of the commencement of any action, such
indemnified party will, if a claim in respect thereof may be made against the
indemnifying party under this Section, notify the indemnifying party in
writing of the commencement thereof; but the failure so to notify the
indemnifying party (i) will not relieve it from liability under paragraph (a)
or (b) above unless and to the extent it did not otherwise learn of such
action and such failure results in the forfeiture by the indemnifying party of
substantial rights and defenses; and (ii) will not, in any event, relieve the
indemnifying party from any obligations to any indemnified party other than
the indemnification obligation provided in paragraph (a) or (b) above. The
indemnifying party shall be entitled to assume the defense of the action and
to appoint counsel of the indemnifying party's choice at the indemnifying
party's expense to represent the indemnified party in any action for which
indemnification is sought (in which case the indemnifying party shall not
thereafter be responsible for the fees and expenses of any separate counsel
retained by the indemnified party or parties except as set forth below);
provided, however, that such counsel shall be reasonably satisfactory to the
indemnified party. Notwithstanding the indemnifying party's election to
appoint counsel to represent the indemnified party in an action, the
indemnified party shall have the right to employ separate counsel (including
local counsel), and the indemnifying party shall bear the reasonable fees,
costs and expenses of such separate counsel (and local counsel) if (i) the use
of counsel chosen by the indemnifying party to represent the indemnified party
would present such counsel with a conflict of interest; (ii) the actual or
potential defendants in, or targets of, any such action include both the
indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that there may be legal defenses available to it
and/or other indemnified parties which are different from or additional to
those available to the indemnifying party; (iii) the indemnifying party shall
not have employed counsel satisfactory to the indemnified party to represent
the indemnified party within a reasonable time after notice of the institution
of such action; or (iv) the indemnifying party shall authorize the indemnified
party to employ separate counsel at the expense of the indemnifying party.
Notwithstanding the foregoing, the Company shall not, in the connection with
any one action or proceeding or separate but substantially similar or related
actions or proceedings in the same jurisdiction arising out of the same
general allegations or circumstances, be liable for the reasonable fees and
expenses of more than one separate firm (in addition to one separate firm of
local counsel) at any time for the indemnified parties, which firm or firms
(including any local counsel) shall be designated by the Placement Agent An
indemnifying party will not, without the prior written consent of the
indemnified party, which consent will not be unreasonably withheld, settle or
compromise or consent to the entry of any judgment with respect to any pending
or threatened claim, action, suit or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action)
unless such settlement, compromise or consent includes an unconditional
release of such indemnified party from all liability arising out of such
claim, action, suit or proceeding. The Company shall not be liable for any
losses, claims, damages or liabilities by reason of any settlement of any
action or proceeding effected without the Company's prior written consent,
which consent will not be unreasonably withheld.

                  (d)      In the event that the indemnity provided in
paragraph (a) or (b) of this Section 5 is unavailable to or insufficient to
hold harmless an indemnified party for any reason, then each applicable
indemnifying party, in lieu of indemnifying such indemnified party, shall have
an obligation to contribute to the aggregate losses, claims, damages and
liabilities

                                      16

<PAGE>   18

(including legal or other expenses reasonably incurred in connection with
investigating or defending same) (collectively "Losses"), as incurred, to
which such indemnified party may be subject in such proportion as is
appropriate to reflect the relative benefits received by such indemnifying
party, on the one hand, and such indemnified party, on the other hand, from
the Initial Placement and the Shelf Registration Statement which resulted in
such Losses; provided, however, that in no case shall any Underwriter be
required to contribute any amount in excess of the amount by which the total
price of the Securities and Common Stock issued upon conversion thereof
purchased by such Underwriter under the Shelf Registration Statement exceeds
the amount of any damages which such Underwriter has otherwise been required
to pay. If the allocation provided by the immediately preceding sentence is
unavailable for any reason, the indemnifying party and the indemnified party
shall contribute in such proportion as is appropriate to reflect not only such
relative benefits but also the relative fault of such indemnifying party, on
the one hand, and such indemnified party, on the other hand, in connection
with the statements or omissions which resulted in such Losses as well as any
other relevant equitable considerations.

                  Benefits received by the Company shall be deemed to be equal
to the total net proceeds from the Initial Placement (before deducting
expenses), benefits received by the Placement Agent shall be deemed to be
equal to the total commissions, and benefits received by any other Holders
shall be deemed to be equal to the value of receiving Securities or the Common
Stock issuable upon conversion thereof registered under the Act. Benefits
received by any Underwriter shall be deemed to be equal to the total
underwriting discounts and commissions, as set forth on the cover page of the
Prospectus forming a part of the Shelf Registration Statement (or the
applicable Prospectus supplement) which resulted in such Losses. Relative
fault shall be determined by reference to, among other things, whether any
untrue statement or omission or alleged untrue statement or omission relates
to information provided by the indemnifying party, on the one hand, or by the
indemnified party, on the other hand. The parties agree that it would not be
just and equitable if contribution were determined by pro rata allocation or
any other method of allocation which does not take account of the equitable
considerations referred to above. Notwithstanding the provisions of this
paragraph, no person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. For purposes of this Section, each person who controls a
Holder within the meaning of either the Securities Act or the Exchange Act and
each director, officer, employee and agent of such Holder shall have the same
rights to contribution as such Holder, and each person who controls the
Company within the meaning of either the Securities Act or the Exchange Act,
each officer of the Company and each director of the Company shall have the
same rights to contribution as the Company, and each person who controls an
Underwriter within the meaning of either the Act or the Exchange Act and each
officer and director of each Underwriter shall have the same rights to
contribution as such Underwriter, subject in each case to the applicable terms
and conditions of this paragraph.

                  (e)      The provisions of this Section will remain in full
force and effect, regardless of any investigation made by or on behalf of any
Holder, any Underwriter or the Company or any of the officers, directors or
controlling persons referred to in Section 5 hereof, and will survive the sale
by a Holder of Securities or shares of Common Stock covered by a Shelf
Registration Statement.

                                      17

<PAGE>   19

                  6.       Miscellaneous.

                  (a)      No Inconsistent Agreements. The Company has not, as
of the date hereof, entered into nor shall it, on or after the date hereof,
enter into, any agreement with respect to its securities that is inconsistent
with the rights granted to the Holders herein or otherwise conflicts with the
provisions hereof.

                  (b)      Amendments and Waivers. The provisions of this
Agreement, including the provisions of this sentence, may not be amended,
qualified, modified or supplemented, and waivers or consents to departures
from the provisions hereof may not be given, unless the Company has obtained
the written consent of the Majority Holders; provided that with respect to any
matter that directly or indirectly affects the rights of the Placement Agent
hereunder, the Company shall obtain the written consent of the Placement Agent
against which such amendment, qualification, supplement, waiver or consent is
to be effective. Notwithstanding the foregoing (except the foregoing proviso),
a waiver or consent to departure from the provisions hereof with respect to a
matter that relates exclusively to the rights of Holders whose Securities or
Common Stock are being sold pursuant to a Shelf Registration Statement and
that does not directly or indirectly affect the rights of other Holders may be
given by the Majority Holders, determined on the basis of Securities or Common
Stock issued upon conversion thereof being sold rather than registered under
such Shelf Registration Statement.

                  (c)      Notices. All notices and other communications
provided for or permitted hereunder shall be made in writing by hand-delivery,
first-class mail, telecopier, or air courier guaranteeing overnight delivery:

                  (1)      if to the Placement Agent, initially at the address
set forth in the Placement Agreement;

                  (2)      if to any other Holder, at the most current address
given by such Holder to the Company in accordance with the provisions of this
Section 6(c), which address initially is, with respect to each Holder, the
address of such Holder maintained by the Registrar under the Indenture or, in
the case of Common Stock, the address maintained by the registrar of the
Common Stock, with a copy in like manner to the Placement Agent; and

                  (3)      if to the Company, initially at its address set
forth in the Placement Agreement.

                  All such notices and communications shall be deemed to have
been duly given when received, if delivered by hand or air courier, and when
sent, if sent by first-class mail or telecopier.

                  The Placement Agent or the Company by notice to the other
may designate additional or different addresses for subsequent notices or
communications.

                  (d)      Successors and Assigns. This Agreement shall inure
to the benefit of and be binding upon the successors and assigns of each of
the parties, including, without the need for an express assignment or any
consent by the Company thereto, subsequent Holders. The Company hereby agrees
to extend the benefits of this Agreement to any Holder and any such

                                      18

<PAGE>   20

Holder may enforce the provisions of this Agreement as if an original party
hereto. In the event that any other person shall succeed to the Company under
the Indenture as provided in Article VI thereof, then such successor shall
enter into an agreement, in form and substance reasonably satisfactory to the
Placement Agent, whereby such successor shall assume all of the Company's
obligations under this Agreement.

                  (e)      Counterparts. This agreement may be executed in any
number of counterparts and by the parties hereto in separate counterparts,
each of which when so executed shall be deemed to be an original and all of
which taken together shall constitute one and the same agreement.

                  (f)      Headings.  The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  (g)      GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE
TO AGREEMENTS MADE AND TO BE PERFORMED IN SAID STATE, WITHOUT REGARD, TO THE
EXTENT PERMITTED BY APPLICABLE LAW, TO THE CONFLICTS OF LAW RULES THEREOF.

                  (h)      Severability. In the event that any one of more of
the provisions contained herein, or the application thereof in any
circumstances, is held invalid, illegal or unenforceable in any respect for
any reason, the validity, legality and enforceability of any such provision in
every other respect and of the remaining provisions hereof shall not be in any
way impaired or affected thereby, it being intended that all of the rights and
privileges of the parties shall be enforceable to the fullest extent permitted
by law.

                  (i)      Securities Held by the Company, etc. Whenever the
consent or approval of Holders of a specified percentage of principal amount
of Securities or the Common Stock issuable upon conversion thereof is required
hereunder, Securities or the Common Stock issued upon conversion thereof held
by the Company or its Affiliates (other than subsequent Holders of Securities
or the Common Stock issued upon conversion thereof if such subsequent Holders
are deemed to be Affiliates solely by reason of their holdings of such
Securities) shall not be counted in determining whether such consent or
approval was given by the Holders of such required percentage.

                  (j)      Benefit of Agreement.  Each Holder of the
Securities and/or Common Stock from time to time shall be a third-party
beneficiary of this Agreement.

                                      19

<PAGE>   21

                           IN WITNESS WHEREOF, the parties have executed this
Agreement as of the date first written above.

                                              ONLINE RESOURCES CORPORATION

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

                                              JEFFERIES & COMPANY. INC.

                                              By
                                                ----------------
                                              Authorized Representative

<PAGE>   22

                                                                   EXHIBIT A

                       Notice of Registration Statement

                                     and

                     Selling Securityholder Questionnaire

                  Reference is hereby made to the Registration Agreement (the
"Registration Agreement") between OnLine Resources Corporation., a Delaware
corporation (the "Company"), and the Placement Agent named therein. Pursuant
to the Registration Agreement, the Company has filed or will file with the
United States Securities and Exchange Commission (the "Commission") a
registration statement on Form S-3 (the "Shelf Registration Statement") for
the registration and resale under Rule 415 of the Securities Act of 1933, as
amended (the "Securities Act"), of the Company's 8.0% Convertible Subordinated
Notes due 2005 (the "Securities"), and the shares of the Company's common
stock, par value $.01 per share (the "Common Stock"), issuable upon conversion
thereof. A copy of the Registration Agreement is attached hereto. All
capitalized terms not otherwise defined herein shall have the meanings
ascribed thereto in the Registration Agreement.

                  Each holder and beneficial owner of Transfer Restricted
Securities is entitled to have its Transfer Restricted Securities included in
the Shelf Registration Statement. In order to have Transfer Restricted
Securities included in the Shelf Registration Statement, this Notice of
Registration Statement and Selling Securityholder Questionnaire ("Notice and
Questionnaire") must be completed, executed and delivered to the Company's
counsel at the following address, for receipt ON OR BEFORE [DEADLINE FOR
RESPONSE]: Mark Wishner, Mintz, Levin, Cohen, Ferris, Glovsky & Popeo, 11911
Freedom Drive, Suite 400, Reston, VA 20190. Holders or beneficial owners of
Transfer Restricted Securities who do not complete, execute and return this
Notice and Questionnaire by such date (i) will not be named as selling
securityholders in the Shelf Registration Statement and (ii) may not use the
Prospectus forming a part thereof for resales of Transfer Restricted
Securities, subject, however, to the Company's obligations under Section
2(b)(2) of the Registration Agreement.

                  Certain legal consequences arise from being named as a
selling securityholder in the Shelf Registration Statement and related
Prospectus. Accordingly, holders and beneficial owners of Transfer Restricted
Securities are advised to consult their own securities law counsel regarding
the consequences of being named or not being named as a selling securityholder
in the Shelf Registration Statement and related Prospectus.

                                   ELECTION

                  The undersigned (the "Selling Securityholder") hereby elects
to include in the Shelf Registration Statement the Transfer Restricted
Securities held or beneficially owned by it and listed below in Item (3)(b).
The undersigned, by signing and returning this Notice and Questionnaire,
agrees to be bound with respect to such Transfer Restricted Securities by the
terms and conditions of this Notice and Questionnaire and the Registration
Agreement,

                                     A-1

<PAGE>   23

including, without limitation, the indemnification set forth in Section 4 of
the Registration Agreement, as if the undersigned Selling Securityholder were
an original party thereto.

QUESTIONNAIRE

(1)      (a)      Full legal name of Selling Securityholder:

         (b)      Full legal name of registered holder (if not the same as in
(a) above) of Transfer Restricted Securities listed in (3) below (if the
Transfer Restricted Securities are held through a broker-dealer or other third
party and, as a result, you do not know the legal name of the registered
holder, please complete Item (1)(c) below):

         (c)      Full legal name of broker-dealer or other third party
through which Transfer Restricted Securities listed in (3) below are held:

(2)      Address for notices to Selling Securityholder:

Telephone:
Fax:
Contact Person:

(3)      Beneficial ownership of Transfer Restricted Securities.

         Except as set forth below in this Item (3), the undersigned does not
beneficially own any Securities or shares of Common Stock which constitute
Transfer Restricted Securities.

         (a)      Principal amount of Securities constituting Transfer
Restricted Securities beneficially owned:

         Number of shares of Common Stock, if any, constituting Transfer
Restricted Securities (include only shares of Common Stock which have actually
been issued, not shares issuable upon future conversion of Securities):

         The undersigned also may be deemed to beneficially own such number of
shares of Common Stock as may be issued from time to time upon conversion of
the Securities listed in Item (3)(a) above.

         (b)      Principal amount of Securities and number of shares of
outstanding Common Stock constituting Transfer Restricted Securities which the
undersigned wishes to be included in the Shelf Registration Statement:

         Unless otherwise indicated in the space provided below, all
Securities, all shares of Common Stock listed in response to Item (3)(a)
above, and all shares of Common Stock issuable upon conversion of the
Securities listed in response to Item (3)(b)above, will be included in the

                                     A-2

<PAGE>   24

Shelf Registration Statement. If the undersigned does not wish all such
Securities or shares of Common Stock to be so included, please indicate below
the number of such shares to be included:

(4)      Beneficial ownership of other securities of the Company:

         Except as set forth below in this Item (4), the undersigned Selling
Securityholder is not the beneficial or registered owner of any shares of
Common Stock or any other securities of the Company, other than Securities and
shares of Common Stock listed above in Item (3).

         State any exceptions here:

(5)      Relationships with the Company:

         Except as set forth below, neither the Selling Securityholder nor any
of its officers, directors or 5% or greater stockholders has held any position
or office or has had any other material relationship with the Company (or its
predecessors or affiliates)during the past three years.

         State any exceptions here:

(6)      Plan of Distribution:

         Except as set forth below, the undersigned Selling Securityholder
intends to distribute the Transfer Restricted Securities listed above in Item
(3) only as follows (if at all): Such Transfer Restricted Securities may be
sold from time to time by the undersigned Selling Securityholder (i) to or
through underwriters, brokers or dealers; (ii) directly to one or more other
purchasers; (iii) through agents on a best-efforts basis or otherwise; or (iv)
through a combination of any such methods of sale. Such Transfer Restricted
Securities may be sold from time to time in one or more transactions at a
fixed price or prices, which may be changed, at market prices prevailing at
the time of sale, at prices related to such prevailing market prices, at
varying prices determined at the time of sale, or at negotiated prices. Such
sales may be effected in transactions (which may involve crosses or block
transactions) (i) on any national securities exchange or quotation service on
which the Transfer Restricted Securities may be listed or quoted at the time
of sale, (ii) in the over-the-counter market, (iii) in transactions otherwise
than on such exchanges or services or in the over-the-counter market or (iv)
through the writing of options. In connection with sales of the Transfer
Restricted Securities or otherwise, the Selling Securityholder may enter into
hedging transactions with brokers-dealers or others, which may in turn engage
in short sales of the Transfer Restricted Securities in the course of hedging
the positions they assume. The Selling Securityholder may also sell Transfer
Restricted Securities short and deliver Transfer Restricted Securities to
close out such short positions, or loan or pledge Transfer Restricted
Securities to brokers-dealers or others that in turn may sell such

                                     A-3

<PAGE>   25

securities. The Selling Securityholder may pledge or grant a security interest
in some or all of the Transfer Restricted Securities owned by it and, if it
defaults in the performance of its secured obligations, the pledgees or
secured parties may offer and sell the Transfer Restricted Securities from
time to time pursuant to the Prospectus. The Selling Securityholder also may
transfer and donate shares in other circumstances in which case the
transferees, donees, pledgees or other successors in interest will be the
selling stockholders for purposes of the Prospectus. The Selling
Securityholder may sell short the Common Stock and may deliver the Prospectus
in connection with such short sales and use the shares covered by the
Prospectus to cover such short sales.

         State any exceptions here:

         By signing below, the Selling Securityholder acknowledges that it
understands its obligation to comply, and agrees that it will comply, with the
provisions of the Securities Exchange Act of 1934, as amended, and the rules
and regulations thereunder, particularly Regulation M and the prospectus
delivery requirements under the Securities Act.

         In the event that the Selling Securityholder transfers all or any
portion of the Transfer Restricted Securities listed in Item (3) above after
the date on which such information is provided to the Company (other than a
transaction as a result of which such securities shall no longer be Transfer
Restricted Securities), the Selling Securityholder agrees to notify the
transferees at the time of the transfer of its rights and obligations under
this Notice and Questionnaire and the Registration Agreement.

         By signing below, the Selling Securityholder consents to the
disclosure of the information contained herein in its answers to Items (1)
through (6) above and the inclusion of such information in the Shelf
Registration Statement and related Prospectus. The Selling Securityholder
understands that such information will be relied upon by the Company in
connection with the preparation of the Shelf Registration Statement and
related Prospectus.

         The Selling Securityholder agrees to promptly notify the Company of
any inaccuracies or changes in the information provided herein which may occur
subsequent to the date hereof at any time while the Shelf Registration
Statement remains in effect. All notices hereunder and pursuant to the
Registration Agreement shall be made in writing, by hand-delivery, first-class
mail, or air courier guaranteeing overnight delivery as follows:

         OnLine Resources Corporation
         7600 Colshire Drive
         6th Floor
         McLean, VA 22102
         Attention:  Carl Blandino

         Once this Notice and Questionnaire is executed by the Selling
Securityholder and received by the Company, the terms of this Notice and
Questionnaire, and the representations and warranties contained herein, shall
be binding on, shall inure to the benefit of and shall be enforceable by the
respective successors, heirs, personal representatives, and assigns of the
Company and the Selling Securityholder (with respect to the Transfer
Restricted Securities

                                     A-4

<PAGE>   26

beneficially owned by such Selling Securityholder and listed in Item (3)(b)
above). This Agreement shall be governed by and construed in accordance with
the internal laws of the State of New York.

                                     A-5

<PAGE>   27

         IN WITNESS WHEREOF, the undersigned, by authority duly given, has
caused this Notice and Questionnaire to be executed and delivered either in
person or by its duly authorized agent.

Dated:

                                  Selling Securityholder(Print/type full legal
                                  name of beneficial owner of Transfer
                                  Restricted Securities).

                                  By:_______________________________
                                           Name:
                                           Title:

                                     A-6

<PAGE>   28

                                                                  EXHIBIT B

                  FORM OF LETTER TO BE PROVIDED BY ISSUER TO

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

                         THE DEPOSITORY TRUST COMPANY
                         7 Hanover Square, 23rd Floor
                              New York, NY 10004

         Re:      8.0% Convertible Subordinated Notes due 2005 (the
                  "Securities") of Online Resources Corporation.

Ladies and Gentlemen:

         Please be advised that the Securities and Exchange Commission has
declared effective a Registration Statement on Form S-3 under the Securities
Act of 1933, as amended, with regard to all of the Securities referenced
above. Accordingly, there is no longer any restriction as to whom such
Securities may be sold and any restrictions on the CUSIP designation are no
longer appropriate and may be removed. I understand that upon receipt of this
letter, DTC will remove any stop or restriction on its system with respect to
this issue.

         As always, please do not hesitate to call if we can of further
assistance.

                                            Very truly yours,

                                            By:________________________
                                                 Authorized Officer

                                     B-1

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