ADVANCED FIBRE COMMUNICATIONS INC
8-A12G, 1998-05-19
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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


                                    FORM 8-A



                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                       ADVANCED FIBRE COMMUNICATIONS, INC.
               (Exact name of registrant as specified in charter)


               DELAWARE                     0-28734             68-0277743
(State of incorporation or organization)  (Commission          (IRS Employer
                                         File Number)        Identification No.)

               One Willow Brook Court, Petaluma, California, 94954
                    (Address of principal executive offices)


       Registrant's telephone number, including area code: (707) 794-7700

        Securities to be registered pursuant to Section 12(b) of the Act:

                                      NONE
                                (Title of Class)

        Securities to be registered pursuant to Section 12(g) of the Act:


                         PREFERRED STOCK PURCHASE RIGHTS
                                (Title of Class)


<PAGE>   2
Item 5. Other Events.

        On May 13, 1998, the Board of Directors of Advanced Fibre
Communications, Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of Common Stock (the
"Common Stock"), par value $0.01 per share, of the Company. The dividend is
payable on May 25, 1998 (the "Record Date") to the stockholders of record on
that date. Each Right entitles the registered holder to purchase from the
Company one one-thousandth of a share (a "Unit") of Series A Junior
Participating Preferred Stock, par value $0.01 per share (the "Series A
Preferred Stock"), of the Company at a price of $225.00 per Unit (the "Purchase
Price"), subject to adjustment. The description and terms of the Rights are set
forth in a Rights Agreement dated as of May 13, 1998 (the "Rights Agreement")
between the Company and BankBoston, N.A., as Rights Agent (the "Rights Agent").

        Until the earlier to occur of (i) the close of business on the tenth day
after the first date of a public announcement that a person or group of
affiliated or associated persons (an "Acquiring Person") have acquired
beneficial ownership of 15% or more of the outstanding Common Stock or (ii) 10
business days (or such later date as may be determined by action of the
Continuing Directors prior to such time as any Person becomes an Acquiring
Person) following the commencement of, or announcement of an intention to make,
a tender offer or exchange offer the consummation of which would result in the
beneficial ownership by a person or group of 15% or more of such outstanding
Common Stock (the earlier of such dates being called the "Distribution Date"),
the Rights will be evidenced, with respect to any of the Common Stock
certificates outstanding as of the Record Date, by such Common Stock certificate
with a copy of this Summary of Rights attached thereto.

        The Rights Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Stock. Until the
Distribution Date (or earlier redemption or expiration of the Rights), new
Common Stock certificates issued after the Record Date, upon transfer or new
issuance of Common Stock will contain a notation incorporating the Rights
Agreement by reference. Until the Distribution Date (or earlier redemption or
expiration of the Rights), the surrender for transfer of any certificates for
Common Stock, outstanding as of the Record Date, even without such notation or a
copy of this Summary of Rights being attached thereto, will also constitute the
transfer of the Rights associated with the Common Stock represented by such
certificate. As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Rights Certificates") will be mailed to
holders of record of the Common Stock as of the Close of Business on the
Distribution Date and such separate Rights Certificates alone will evidence the
Rights.

        The Rights are not exercisable until the Distribution Date. The Rights
will expire at the close of business on May 25, 2008 (the "Final Expiration
Date"), unless the Final Expiration Date is extended or unless the Rights are
earlier redeemed or exchanged by the Company, in each case as described below.

        The Purchase Price payable, and the number of Units of Series A
Preferred Stock or other securities or property issuable, upon exercise of the
Rights are subject to adjustment from time to time to prevent dilution (i) in
the event of a stock dividend on, or a subdivision, combination or
reclassification of, the Series A Preferred Stock, (ii) upon the grant to
holders of the Units of Series A Preferred Stock of certain rights or warrants
to subscribe for or purchase Units of Series A Preferred Stock at a price, or
securities convertible into Units of Series A Preferred Stock with a conversion
price, less than the then current market price of the Units of Series A
Preferred Stock or (iii) upon the distribution to holders of the Units of Series
A Preferred Stock of evidences of indebtedness or assets (excluding regular
periodic cash dividends paid out of earnings or retained earnings or dividends
payable in Units of Series A Preferred Stock) or of subscription rights or
warrants (other than those referred to above).

        The number of outstanding Rights and the number of Units of Series A
Preferred Stock issuable upon exercise of each Rights are also subject to
adjustment in the event of a stock split of the Common Stock or a stock dividend
on the Common Stock payable in Common Stock or subdivisions, consolidations or
combinations of the Common Stock occurring, in any such case, prior to the
Distribution Date.


                                       2.
<PAGE>   3
        Units of Series A Preferred Stock purchasable upon exercise of the
Rights will not be redeemable. Each Unit of Series A Preferred Stock will be
entitled to an aggregate dividend of 1,000 times the dividend declared per share
of Common Stock. In the event of liquidation, the holders of the Units of Series
A Preferred Stock will be entitled to an aggregate payment of 1,000 times the
payment made per share of Common Stock. Each Unit of Series A Preferred Stock
will have 1,000 votes, voting together with the Common Stock. Finally, in the
event of any merger, consolidation or other transaction in which shares of
Common Stock are exchanged, each Unit of Series A Preferred Stock will be
entitled to receive 1,000 times the amount received per share of Common Stock.
These rights are protected by customary antidilution provisions.

        Because of the nature of the dividend, liquidation and voting rights,
the value of the Series A Preferred Stock, the Units of Series A Preferred Stock
purchasable upon exercise of each Rights should approximate the value of one
share of Common Stock.

        In the event that, after the Rights become exercisable, the Company is
acquired in a merger or other business combination transaction with an Acquiring
Person or an affiliate thereof, or 50% or more of its consolidated assets or
earning power are sold to an Acquiring Person or an affiliate thereof, proper
provision will be made so that each holder of a Rights will thereafter have the
right to receive, upon exercise thereof at the then current exercise price of
the Rights, that number of shares of common stock of the acquiring company which
at the time of such transaction will have a market value of two times the
exercise price of the Rights.

        In the event that any person or group of affiliated or associated
persons becomes the beneficial owner of 15% or more of the outstanding shares of
Common Stock proper provision shall be made so that each holder of a Right,
other than Rights beneficially owned by the Acquiring Person (which will
thereafter be void), will thereafter have the right to receive upon exercise
that number of shares of Common Stock or Units of Series A Preferred Stock (or
cash, other securities or property) having a market value of two times the
exercise price of the Rights.

        At any time after the acquisition by a person or group of affiliated or
associated persons of beneficial ownership of 15% or more of the outstanding
shares of Common Stock and prior to the acquisition by such person or group of
50% or more of the outstanding Common Stock, the Continuing Directors of the
Company may exchange the Rights (other than Rights owned by such person or group
which have become void), in whole or in part, at an exchange ratio of one Unit
of Series A Preferred Stock (subject to adjustment) which shall equal, subject
to adjustment to reflect stock splits, stock dividends and similar transactions
occurring after the date hereof, that number obtained by dividing the Purchase
Price by the then current per share market price per Unit of Series A Preferred
Stock on the earlier of (i) the date on which any Person becomes an Acquiring
Person and (ii) the date on which a tender or exchange offer is announced by any
Person, if upon consummation thereof such Person would be the Beneficial Owner
of 15% or more of the shares of Company Common Stock then outstanding.

        With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional shares of Series A Preferred Stock will be
issued (other than fractions which are integral multiples of one one-thousandth
of a share of Series A Preferred Stock, which may, at the election of the
Company, be evidenced by depositary receipts) and, in lieu thereof, an
adjustment in cash will be made based on the market price of the Units of Series
A Preferred Stock on the last trading day prior to the date of exercise.

        At any time on or prior to the Distribution Date, the Board of Directors
of the Company may redeem the Rights in whole, but not in part, at a price of
$0.001 per Right (the "Redemption Price"), upon the approval of a majority of
the Continuing Directors. The redemption of the rights may be made effective at
such time on such basis and with such conditions as the Board of Directors, upon
the approval of the Continuing Directors, in its sole discretion may establish.
Immediately upon any redemption of the Rights, the right to exercise the Rights
will terminate and the only right of the holders of Rights will be to receive
the Redemption Price. The Rights are also redeemable under other circumstances
as specified in the Rights Agreement.


                                       3.
<PAGE>   4
        The terms of the Rights may be amended by the Board of Directors of the
Company without the consent of the holders of the Rights, upon the approval of a
majority of the Continuing Directors, except that from and after a Distribution
Date no such amendment may adversely affect the interests of the holders of the
Rights.

        Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

        The Rights have certain anti-takeover effects. The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
on terms not approved by the Company's Board of Directors, except pursuant to an
offer conditioned on a substantial number of Rights being acquired. The Rights
should not interfere with any merger or other business combination approved by
the Board of Directors since the Rights may be redeemed by the Company at the
Redemption Price prior to the occurrence of a Distribution Date.

        The Rights Agreement, dated as of May 13, 1998, between the Company and
the Rights Agent, specifying the terms of the Rights, is attached hereto as an
exhibit and is incorporated herein by reference. The foregoing description of
the Rights is qualified in its entirety by reference to such exhibit.


Item 2. Exhibits.

1.      Rights Agreement, dated as of May 13, 1998, between the Company and
        BankBoston, N.A., which includes the form of Certificate of Designation
        for the Series A Junior Participating Preferred Stock as Exhibit A, the
        form of Rights Certificate as Exhibit B and the Summary of Rights to
        Purchase Series A Preferred Stock as Exhibit C. Pursuant to the Rights
        Agreement, printed Right Certificates will not be mailed until as soon
        as practicable after the earlier of (i) the close of business on the
        tenth day after first date of a public announcement that a person or
        group has acquired beneficial ownership of 15% or more of the shares of
        Common Stock or (ii) the tenth business day (or such later date as may
        be determined by action of the Continuing Directors) after a person
        commences, or announces its intention to commence, a tender offer or
        exchange offer the consummation of which would result in the beneficial
        ownership by a person or group of 15% or more of the shares of Common
        Stock.


                                       4.
<PAGE>   5
                                    SIGNATURE

        Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the registrant has duly caused this registration statement to be
signed on its behalf by the undersigned, thereto duly authorized.



                                ADVANCED FIBRE COMMUNICATIONS, INC.



DATE:  May 18, 1998             By:   /s/ PETER A. DARBEE
                                     -------------------------------------------
                                     Name: Peter A. Darbee
                                     Title: Vice President, Chief Financial
                                     Officer, Treasurer and Secretary


                                       5.
<PAGE>   6
                                  EXHIBIT INDEX


EXHIBIT
NUMBER                       DOCUMENT DESCRIPTION
- -------                      --------------------

1.      Rights Agreement, dated as of May 13, 1998, between the Company and
        BankBoston, N.A., which includes the form of Certificate of Designation
        for the Series A Junior Participating Preferred Stock as Exhibit A, the
        form of Rights Certificate as Exhibit B and the Summary of Rights to
        Purchase Preferred Stock as Exhibit C. Pursuant to the Rights Agreement,
        printed Right Certificates will not be mailed until as soon as
        practicable after the earlier of (i) the close of business on the tenth
        day after the first date of a public announcement that a person or group
        has acquired beneficial ownership of 15% or more of the shares of Common
        Stock or (ii) the tenth business day (or such later date as may be
        determined by action of the Continuing Directors) after a person
        commences, or announces its intention to commence, a tender offer or
        exchange offer the consummation of which would result in the beneficial
        ownership by a person or group of 15% or more of the shares of Common
        Stock.

<PAGE>   1
                                                                           
           
                                                                   EXHIBIT 1

                       ADVANCED FIBRE COMMUNICATIONS, INC.


                                       AND


                                BANKBOSTON, N.A.


                                 (RIGHTS AGENT)


                                RIGHTS AGREEMENT


                            DATED AS OF MAY 13, 1998



<PAGE>   2
                                TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                                            Page
                                                                                            ----
<S>                                                                                         <C>
        Section 1.    Certain Definitions..................................................  1

        Section 2.    Appointment of Rights Agent..........................................  5

        Section 3.    Issue of Rights Certificates.........................................  6

        Section 4.    Form of Rights Certificates..........................................  7

        Section 5.    Countersignature and Registration....................................  8

        Section 6.    Transfer, Split-Up, Combination and Exchange of Rights Certificates;
                      Mutilated, Destroyed, Lost or Stolen Rights Certificates.............  9

        Section 7.    Exercise of Rights; Purchase Price; Expiration Date of Rights........ 10

        Section 8.    Cancellation and Destruction of Rights Certificates.................. 11

        Section 9.    Reservation and Availability of Preferred Stock...................... 12

        Section 10.   Preferred Stock Record Date.......................................... 13

        Section 11.   Adjustment of Purchase Price, Number of Shares or Number of Rights... 13

        Section 12.   Certificate of Adjusted Purchase Price or Number of Shares........... 22

        Section 13.   Consolidation, Merger or Sale or Transfer of Assets or Earning Power. 22

        Section 14.   Fractional Rights and Fractional Shares.............................. 25

        Section 15.   Rights of Action..................................................... 26

        Section 16.   Agreement of Rights Holders.......................................... 26

        Section 17.   Rights Certificate Holder Not Deemed a Stockholder................... 27

        Section 18.   Concerning the Rights Agent.......................................... 27

        Section 19.   Merger or Consolidation or Change of Name of Rights Agent............ 28

        Section 20.   Duties of Rights Agent............................................... 28
</TABLE>


                                       i.


<PAGE>   3
<TABLE>
<CAPTION>
                                                                                            Page
                                                                                            ----
<S>                                                                                         <C>
        Section 21.   Change of Rights Agent............................................... 31

        Section 22.   Issuance of New Rights Certificates.................................. 31

        Section 23.   Redemption and Termination........................................... 32

        Section 24.   Exchange............................................................. 33

        Section 25.   Notice of Certain Events............................................. 34

        Section 26.   Notices.............................................................. 35

        Section 27.   Supplements and Amendments........................................... 36

        Section 28.   Successors........................................................... 36

        Section 29.   Determinations and Actions by the Board of Directors................. 36

        Section 30.   Benefits of This Agreement........................................... 37

        Section 31.   Severability......................................................... 37

        Section 32.   Governing Law........................................................ 37

        Section 33.   Counterparts......................................................... 37

        Section 34.   Descriptive Headings................................................. 37
</TABLE>


EXHIBITS

Exhibit A -    Form of Certificate of Designation of Series A Junior 
               Participating Preferred Stock

Exhibit B -    Form of Rights Certificate

Exhibit C -    Summary of Rights to Purchase Shares of Series A Preferred Stock


                                       ii.


<PAGE>   4
                                RIGHTS AGREEMENT


               RIGHTS AGREEMENT, dated as of May 13, 1998, between Advanced
Fibre Communications, Inc., a Delaware corporation (the "Company"), and
BankBoston, N.A.(the "Rights Agent").

               WHEREAS, effective May 13, 1998, (the "Rights Dividend
Declaration Date"), the Board of Directors authorized and declared a
distribution of one Right (each, a "Right") for each share of Common Stock (as
hereinafter defined) of the Company outstanding as of the Close of Business (as
hereinafter defined) on May 25, 1998 (the "Record Date"), each Right initially
representing the right to purchase one one-thousandth of a share (a "Unit") of
Preferred Stock (as hereinafter defined) upon the terms and subject to the
conditions herein set forth, and has further authorized and directed the
issuance of one Right with respect to each share of Common Stock that shall
become outstanding between the Record Date and the earliest of the Distribution
Date, the Redemption Date or the Final Expiration Date (as such terms are
hereinafter defined).

               NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

               Section 1. Certain Definitions. For purposes of this Agreement,
the following terms have the meanings indicated:

               "Acquiring Person" shall mean (i) any Person (as such term is
hereinafter defined) who or which, together with all Affiliates and Associates
(as such terms are hereinafter defined) of such Person, shall be the Beneficial
Owner (as such term is hereinafter defined) of 15% or more of the shares of
Common Stock of the Company then outstanding, but shall not include (1) the
Company, any Subsidiary (as such term is hereinafter defined) of the Company,
any employee benefit plan of the Company or any Subsidiary of the Company, or
any entity holding shares of Common Stock for or pursuant to the terms of any
such plan. Notwithstanding the foregoing:

               (i) no Person shall become an "Acquiring Person" as the result of
        an acquisition of shares of Common Stock by the Company which, by
        reducing the number of shares outstanding, increases the proportionate
        number of shares beneficially owned by such Person to 15% or more of the
        shares of Common Stock of the Company then outstanding; provided,
        however, that if a Person shall become the Beneficial Owner of 15% or
        more of the shares of Common Stock of the Company then outstanding by
        reason of share purchases by the Company and shall, after such share
        purchases by the Company, become the Beneficial Owner of any additional
        shares of Common Stock of the Company (or, in the case of the members of
        the Investor Group, become the Beneficial Owner of any additional shares
        of Common Stock of the Company), then such Person shall be deemed to be
        an "Acquiring Person" hereunder; and


                                       1.


<PAGE>   5
               (ii) if the Board of Directors of the Company determines (upon
        approval by a majority of the Continuing Directors (as such term is
        hereinafter defined)) in good faith that a Person who would otherwise be
        an "Acquiring Person" as defined pursuant to the foregoing provisions of
        this paragraph (a), has become such inadvertently, and such Person
        divests as promptly as practicable a sufficient number of shares of
        Common Stock so that such Person would no longer be an "Acquiring
        Person" (as defined pursuant to the foregoing provisions of this
        paragraph (a)), then such Person shall not be deemed to be an "Acquiring
        Person" for any purpose of this Agreement.

               "Adjustment Shares" has the meaning set forth in Section
11(a)(ii).

               "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Exchange Act (as such term is hereinafter defined).

               A Person shall be deemed the "Beneficial Owner" of, and shall be
deemed to "beneficially own," any securities:

               (i) which such Person or any of such Person's Affiliates or
        Associates beneficially owns, directly or indirectly, for purposes of
        Section 13(d) of the Exchange Act and Rule 13d-3 thereunder (or any
        comparable or successor law or regulation); or

               (ii) which such Person or any of such Person's Affiliates or
        Associates, directly or indirectly, has (A) the right to acquire
        (whether such right is exercisable immediately or only after the passage
        of time) pursuant to any agreement, arrangement or understanding
        (whether or not in writing, other than customary agreements with and
        between underwriters and selling group members with respect to a bona
        fide public offering of securities), or upon the exercise of conversion
        rights, exchange rights, rights (other than the Rights), warrants or
        options, or otherwise; provided, however, that a Person shall not be
        deemed the Beneficial Owner of, or to beneficially own, securities
        tendered pursuant to a tender or exchange offer made by or on behalf of
        such Person or any of such Person's Affiliates or Associates until such
        tendered securities are accepted for purchase or exchange; or (B) the
        right to vote pursuant to any agreement, arrangement or understanding;
        provided further, however, that a Person shall not be deemed the
        "Beneficial Owner" of, or to "beneficially own," any security under this
        subparagraph (ii) as a result of an agreement, arrangement or
        understanding to vote such security if such agreement, arrangement or
        understanding: (x) arises solely from a revocable proxy given in
        response to a public proxy or consent solicitation made pursuant to, and
        in accordance with, the applicable provisions of the Exchange Act and
        the Exchange Act Regulations, and (y) is not reportable by such Person
        on Schedule 13D under the Exchange Act (or any comparable or successor
        report); or

               (iii) which are beneficially owned, directly or indirectly, by
        any other Person (or any Affiliate or Associate thereof) with which such
        Person (or any of such Person's


                                       2.


<PAGE>   6
        Affiliates or Associates) has any agreement, arrangement or
        understanding, (whether or not in writing, other than customary
        agreements with and between underwriters and selling group members with
        respect to a bona fide public offering of securities), for the purpose
        of acquiring, holding, voting (except to the extent contemplated by the
        proviso to subparagraph (i)) or disposing of any securities of the
        Company; provided, however, that in no case shall an officer or director
        of the Company be deemed (A) the Beneficial Owner of any securities
        beneficially owned by another officer or director of the Company solely
        by reason of actions undertaken by such persons in their capacity as
        officers or directors of the Company or (B) the Beneficial Owner of
        securities held of record by the trustee of any employee benefit plan of
        the Company or any Subsidiary of the Company for the benefit of any
        employee of the Company or any Subsidiary of the Company, other than the
        officer or director, by reason of any influence that such officer or
        director may have over the voting of the securities held in the plan;

Notwithstanding anything in this definition of "Beneficial Owner" and
"beneficially own" to the contrary, the phrase "then outstanding," when used
with reference to a Person who is the Beneficial Owner of securities of the
Company, shall mean the number of such securities then issued and outstanding
together with the number of such securities not then actually issued and
outstanding which such Person would be deemed to beneficially own hereunder.

               "Business Day" shall mean any day other than a Saturday, a
Sunday, or a day on which banking institutions in the State of California or the
state in which the principal office of the Rights Agent is located are
authorized or obligated by law or executive order to close.

               "Close of Business" on any given date shall mean 5:00 P.M.,
Massachusetts time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 P.M., Massachusetts time, on the next succeeding
Business Day.

               "Common Stock" when used with reference to the Company shall mean
the shares of common stock, par value $0.01, of the Company. "Common Stock" when
used with reference to any Person other than the Company shall mean the capital
stock (or other equity interest) with the greatest voting power of such other
Person or, if such other Person is a Subsidiary of another Person, the Person or
Persons which ultimately control such first-mentioned Person.

               "Company" shall have the meaning set forth in the recitals to
this Agreement.

               "Continuing Director" shall mean a member of the Board of
Directors of the Company who is not an Acquiring Person, or an Affiliate or
Associate of an Acquiring Person, or a representative or agent of an Acquiring
Person or of any such Affiliate or Associate, and who was either (i) a member of
the Board of Directors prior to the date of this Agreement, or (ii) subsequently
became a member of the Board of Directors and whose election or nomination for
election is recommended or approved by a majority of the Continuing Directors
then on the Board of Directors.


                                       3.


<PAGE>   7
               "current per share market price" shall have the meaning set forth
in Section 11(d)(i) hereof.

               "Current Value" shall have the meaning set forth in Section
11(a)(iii) hereof.

               "Distribution Date" shall have the meaning set forth in Section
3(a) hereof.

               "equivalent preferred shares" shall have the meaning set forth in
Section 11(b) hereof.

               "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended.

               "Exchange Act Regulations" shall mean the General Rules and
Regulations under the Exchange Act.

               "Exchange Ratio" shall have the meaning set forth in Section 24
hereof.

               "Expiration Date" shall have the meaning set forth in Section
7(a) hereof.

               "Final Expiration Date" shall have the meaning set forth in
Section 7(a) hereof.

               "NASDAQ" shall have the meaning set forth in Section 11(d)
hereof.

               "Person" shall mean any individual, firm, corporation or other
entity, and shall include any successor (by merger or otherwise) of such entity.

               "Preferred Stock" shall mean shares of Series A Preferred Stock,
par value $0.01, of the Company having the rights and preferences set forth in
the Form of Certificate of Designation attached to this Agreement as Exhibit A.

               "preferred stock equivalents" shall have the meaning set forth in
Section 11(a)(iii) hereof.

               "Purchase Price" shall have the meaning set forth in Section 7(b)
hereof.

               "Record Date" shall have the meaning set forth in the recitals to
this Agreement.

               "Redemption Date" shall have the meaning set forth in Section
7(a) hereof.

               "Redemption Price" shall have the meaning set forth in Section
23(a) hereof.

               "Right" shall have the meaning set forth in the recitals to this
Agreement.

               "Rights Agent" shall have the meaning set forth in the recitals
to this Agreement.


                                       4.


<PAGE>   8
               "Rights Certificate" shall have the meaning set forth in Section
3(a) hereof.

               "Rights Dividend Declaration Date" shall have the meaning set
forth in the recitals to this Agreement.

               "Section 11(a)(ii) Event" shall mean any event described in
Section 11(a)(ii)(A), (B) or (C) hereof.

               "Section 11(a)(ii) Trigger Date" shall have the meaning set forth
in Section 11(a)(iii) hereof.

               "Section 13 Event" shall mean any event described in clause (x),
(y) or (z) of Section 13(a) hereof.

               "Section 24(a) Exchange Ratio" has the meaning set forth in
Section 24(a) hereof.

               "Securities Act" shall mean the Securities Act of 1933, as
amended.

               "Shares Acquisition Date" shall mean the first date of public
announcement (which, for purposes of this definition, shall include, without
limitation, a report filed pursuant to Section 13(d) of the Exchange Act) by the
Company or an Acquiring Person that an Acquiring Person has become such.

               "Spread" shall have the meaning set forth in Section 11(a)(iii)
hereof.

               "Subsidiary" of any Person shall mean any corporation or other
entity of which a majority of the voting power of the voting equity securities
or equity interest is owned, directly or indirectly, by such Person.

               "Summary of Rights" shall have the meaning set forth in Section
3(b) hereof.

               "Trading Day" shall have the meaning set forth in Section
11(d)(i) hereof.

               "Triggering Event" shall mean any Section 11(a)(ii) Event or any
Section 13 Event.

               Section 2. Appointment of Rights Agent. The Company hereby
appoints the Rights Agent to act as agent for the Company in accordance with the
terms and conditions hereof, and the Rights Agent hereby accepts such
appointment. The Company may from time to time appoint such co-Rights Agents as
it may deem necessary or desirable, upon ten (10) days' prior written notice to
the Rights Agent. The Rights Agent shall have no duty to supervise, and in no
event be liable for, the acts or omissions of any such co-Rights Agent.


                                       5.


<PAGE>   9
               Section 3. Issue of Rights Certificates.

               (a) Until the earlier of (i) the Close of Business on the tenth
day after the Shares Acquisition Date and (ii) the Close of Business on the
tenth Business Day (or such later date as may be determined by action of the
Company's Board of Directors upon approval by a majority of the Continuing
Directors prior to such time as any Person becomes an Acquiring Person and of
which the Company will give the Rights Agent prompt written notice) after the
date that a tender or exchange offer by any Person (other than the Company, any
Subsidiary of the Company, any employee benefit plan of the Company or of any
Subsidiary of the Company or any entity holding shares of Common Stock for or
pursuant to the terms of any such plan) is first published or sent or given
within the meaning of Rule 14d-4(a) of the Exchange Act Regulations or any
successor rule or of the first public announcement of the intention of any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or of any Subsidiary of the Company or any entity
holding shares of Common Stock for or pursuant to the terms of any such plan) to
commence a tender or exchange offer, if upon consummation thereof such Person
would be the Beneficial Owner of 15% or more of the shares of Company Common
Stock then outstanding (the earlier of (i) and (ii) above being the
"Distribution Date"), (x) the Rights will be evidenced (subject to the
provisions of Section 3(b) hereof) by the certificates for shares of Common
Stock registered in the names of the holders thereof (which certificates shall
also be deemed to be Rights Certificates) and not by separate Rights
Certificates, and (y) the right to receive Rights Certificates will be
transferable only in connection with the transfer of shares of Common Stock. As
soon as practicable after the Distribution Date, the Company will notify the
Rights Agent thereof and the Company will prepare and execute, the Rights Agent
will countersign, and the Company will send or cause to be sent (and the Rights
Agent will, if requested, send) by first-class, insured, postage-prepaid mail,
to each record holder of shares of Common Stock as of the Close of Business on
the Distribution Date, at the address of such holder shown on the records of the
Company, a Rights Certificate, in substantially the form of Exhibit B hereto (a
"Rights Certificate"), evidencing one Right for each share of Common Stock so
held. As of the Distribution Date, the Rights will be evidenced solely by such
Rights Certificates.

               (b) On the Record Date, or as soon as practicable thereafter, the
Company will send a copy of a Summary of Rights to Purchase Preferred Stock, in
substantially the form of Exhibit C hereto (the "Summary of Rights"), by
first-class, postage-prepaid mail, to each record holder of shares of Common
Stock as of the Close of Business on the Record Date, at the address of such
holder shown on the records of the Company. With respect to certificates for
shares of Common Stock outstanding as of the Record Date, until the Distribution
Date, the Rights will be evidenced by such certificates registered in the names
of the holders thereof together with a copy of the Summary of Rights attached
thereto. Until the Distribution Date (or the Expiration Date), the surrender for
transfer of any certificate for shares of Common Stock outstanding on the Record
Date, with or without a copy of the Summary of Rights attached thereto, shall
also constitute the transfer of the Rights associated with the shares of Common
Stock represented thereby.


                                       6.


<PAGE>   10
               (c) Certificates for shares of Common Stock which become
outstanding (including, without limitation, reacquired shares of Common Stock
referred to in the last sentence of this paragraph (c)) after the Record Date
but prior to the earlier of the Distribution Date and the Expiration Date shall
have impressed on, printed on, written on or otherwise affixed to them the
following legend:

               This certificate also evidences and entitles the holder hereof to
               certain rights as set forth in a Rights Agreement between
               Advanced Fibre Communications, Inc. and BankBoston, N.A., dated
               as of March 13, 1998 (the "Rights Agreement"), the terms of which
               are hereby incorporated herein by reference and a copy of which
               is on file at the principal executive offices of Advanced Fibre
               Communications, Inc. Under certain circumstances, as set forth in
               the Rights Agreement, such Rights will be evidenced by separate
               certificates and will no longer be evidenced by this certificate.
               Advanced Fibre Communications, Inc. will mail to the holder of
               this certificate a copy of the Rights Agreement without charge
               after receipt of a written request therefor. Under certain
               circumstances, as set forth in the Rights Agreement, Rights
               issued to any Person who becomes an Acquiring Person (as defined
               in the Rights Agreement), whether currently held by or on behalf
               of such person or by any subsequent holder, may become null and
               void.

With respect to such certificates containing the foregoing legend, until the
earlier of the Distribution Date and the Expiration Date, the Rights associated
with the shares of Common Stock represented by such certificates shall be
evidenced by such certificates alone, and the surrender for transfer of any such
certificate shall also constitute the transfer of the Rights associated with the
shares of Common Stock represented thereby. In the event that the Company
purchases or acquires any shares of Common Stock after the Record Date but prior
to the Distribution Date, any Rights associated with such shares of Common Stock
shall be deemed cancelled and retired so that the Company shall not be entitled
to exercise any Rights associated with the shares of Common Stock which are no
longer outstanding.

               Section 4. Form of Rights Certificates.

               (a) The Rights Certificates (and the forms of election to
purchase Units of Preferred Stock and of assignment to be printed on the reverse
thereof) shall be substantially the same as Exhibit B hereto and may have such
marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Company may deem appropriate and as are not
inconsistent with the provisions of this Agreement, or as may be required to
comply with any applicable law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange or transaction
reporting system on which the Rights may from time to time be listed, or to
conform to usage. Subject to the provisions of Section 11 and Section 22 hereof,
the Rights Certificates shall entitle the holders thereof to purchase the number


                                       7.


<PAGE>   11
of Units of Preferred Stock as shall be set forth therein at the price per Unit
of Preferred Stock set forth therein, but the number of such Units of Preferred
Stock and the Purchase Price shall be subject to adjustment as provided herein.

               (b) Any Rights Certificate issued pursuant hereto that represents
Rights beneficially owned by: (i) an Acquiring Person or any Associate or
Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee after the Acquiring
Person becomes such or (iii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently with
the Acquiring Person becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for consideration) from the Acquiring Person to
holders of equity interests in such Acquiring Person or to any Person with whom
such Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which a majority of the
Continuing Directors of the Company has determined is part of a plan,
arrangement or understanding which has as a primary purpose or effect avoidance
of Section 7(e) hereof shall contain (to the extent feasible) the following
legend:

               The Rights represented by this Rights Certificate are or were
               beneficially owned by a Person who was or became an Acquiring
               Person or an Affiliate or Associate of an Acquiring Person (as
               such terms are defined in the Rights Agreement between Advanced
               Fibre Communications, Inc. and BankBoston, N.A., as Rights Agent,
               dated as of May 13, 1998 (the "Rights Agreement"). Accordingly,
               this Rights Certificate and the Rights represented hereby may
               become null and void in the circumstances specified in Section
               7(e) of the Rights Agreement.

               Section 5. Countersignature and Registration.

               (a) The Rights Certificates shall be executed on behalf of the
Company by its Chairman of the Board, its President, any of its Vice Presidents,
or its Treasurer or Chief Financial Officer, either manually or by facsimile
signature, shall have affixed thereto the Company's seal or a facsimile thereof,
and shall be attested by the Secretary or an Assistant Secretary of the Company,
either manually or by facsimile signature. The Rights Certificates shall be
manually countersigned by the Rights Agent and shall not be valid for any
purpose unless countersigned. In case any officer of the Company who shall have
signed any of the Rights Certificates shall cease to be such officer of the
Company before countersignature by the Rights Agent and issuance and delivery by
the Company, such Rights Certificates, nevertheless, may be countersigned by the
Rights Agent and issued and delivered by the Company with the same force and
effect as though the person who signed such Rights Certificates had not ceased
to be such officer of the Company; and any Rights Certificate may be signed on
behalf of the Company by any person who, at the actual date of the execution of
such Rights Certificate, shall be a proper officer of the Company to sign such
Rights Certificate, although at the date of the execution of this Rights
Agreement any such person was not such an officer.


                                       8.


<PAGE>   12
               (b) Following the Distribution Date, the Rights Agent will keep
or cause to be kept, at its office designated for such purpose, books for
registration and transfer of the Rights Certificates issued hereunder. Such
books shall show the names and addresses of the respective holders of the Rights
Certificates, the number of Rights evidenced on its face by each of the Rights
Certificates and the date of each of the Rights Certificates.

               Section 6. Transfer, Split-Up, Combination and Exchange of Rights
                          Certificates; Mutilated, Destroyed, Lost or Stolen 
                          Rights Certificates.

               (a) Subject to the provisions of Sections 4(b), 7(e) and 14
hereof, at any time after the Close of Business on the Distribution Date, and at
or prior to the Close of Business on the Expiration Date, any Rights Certificate
or Rights Certificates may be transferred, split up, combined or exchanged for
another Rights Certificate or Rights Certificates, entitling the registered
holder to purchase a like number of Units of Preferred Stock (or, following a
Triggering Event, other securities, cash or other assets, as the case may be) as
the Rights Certificate or Rights Certificates surrendered then entitled such
holder to purchase. Any registered holder desiring to transfer, split up,
combine or exchange any Rights Certificate or Rights Certificates shall make
such request in writing delivered to the Rights Agent, and shall surrender the
Rights Certificate or Rights Certificates to be transferred, split up, combined
or exchanged at the office of the Rights Agent designated for such purpose.
Neither the Rights Agent nor the Company shall be obligated to take any action
whatsoever with respect to the transfer of any such surrendered Rights
Certificate until the registered holder shall have completed and signed the
certificate contained in the form of assignment on the reverse side of such
Rights Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company shall reasonably request. Thereupon the Rights
Agent shall, subject to Sections 4(b), 7(e) and 14 hereof, countersign and
deliver to the person entitled thereto a Rights Certificate or Rights
Certificates, as the case may be, as so requested. The Company may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split up, combination or exchange of
Rights Certificates.

               (b) Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Rights Certificate, and, in case of loss, theft or destruction, of indemnity
or security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Rights Certificate if mutilated, the Company will make and deliver a new
Rights Certificate of like tenor to the Rights Agent for delivery to the
registered holder in lieu of the Rights Certificate so lost, stolen, destroyed
or mutilated.


                                       9.


<PAGE>   13
               Section 7. Exercise of Rights; Purchase Price; Expiration Date of
Rights.

               (a) Except as provided in Sections 23(c) and 7(e), the registered
holder of any Rights Certificate may exercise the Rights evidenced thereby
(except as otherwise provided herein) in whole or in part at any time after the
Distribution Date upon surrender of the Rights Certificate, with the form of
election to purchase and certification on the reverse side thereof duly
executed, to the Rights Agent at the office of the Rights Agent designated for
such purpose, together with payment of the Purchase Price for each Unit of
Preferred Stock as to which the Rights are exercised, at or prior to the
earliest of (i) the Close of Business on the tenth anniversary hereof (the
"Final Expiration Date"), (ii) the time at which the Rights are redeemed as
provided in Section 23 hereof (the "Redemption Date"), or (iii) the time at
which such Rights are exchanged as provided in Section 24 hereof (the earlier of
(i), (ii) and (iii) being the "Expiration Date").

               (b) The purchase price for each Unit of Preferred Stock pursuant
to the exercise of a Right shall initially be $225.00 (the "Purchase Price"),
shall be subject to adjustment from time to time as provided in Sections 11 and
13 hereof and shall be payable in lawful money of the United States of America
in accordance with paragraph (c) below.

               (c) Upon receipt of a Rights Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the number of Units of Preferred Stock (or
other securities or property, as the case may be) to be purchased and an amount
equal to any applicable transfer tax required to be paid by the holder of such
Rights Certificate in accordance with Section 9 hereof in cash, or by certified
check or cashier's check payable to the order of the Company, the Rights Agent
shall, subject to Section 20(k) hereof, thereupon promptly (i) (A) requisition
from any transfer agent of the Preferred Stock (or make available, if the Rights
Agent is the transfer agent for the Preferred Stock) a certificate or
certificates for the number of Units of Preferred Stock to be purchased and the
Company hereby irrevocably authorizes its transfer agent to comply with all such
requests or (B) if the Company shall have elected to deposit the total number of
Units of Preferred Stock issuable upon exercise of the Rights hereunder with a
depositary agent, requisition from the depositary agent a depositary receipt or
depositary receipts representing such number of Units of Preferred Stock as are
to be purchased (in which case certificates for the Units of Preferred Stock
represented by such receipt or receipts shall be deposited by the transfer agent
with the depositary agent) and the Company hereby directs the depositary agent
to comply with such request, (ii) when appropriate, requisition from the Company
the amount of cash to be paid in lieu of issuance of fractional shares in
accordance with Section 14 hereof, (iii) after receipt of such certificates or
depositary receipts, cause the same to be delivered to or upon the order of the
registered holder of such Rights Certificate, registered in such name or names
as may be designated by such holder and (iv) when appropriate, after receipt
thereof, deliver such cash to or upon the order of the registered holder of such
Rights Certificate. The payment of the Purchase Price (as such amount may be
reduced (including to zero) pursuant to Section 11(a)(iii) hereof) may be made
in cash or by certified bank check or bank draft payable to the order of the
Company. In the event that the Company is obligated to issue other securities of
the Company, pay cash and/or distribute


                                       10.


<PAGE>   14
other property pursuant to Section 11(a) hereof, the Company will make all
arrangements necessary so that such other securities, cash and/or other property
are available for distribution by the Rights Agent, if and when appropriate.

               (d) In case the registered holder of any Rights Certificate shall
exercise less than all the Rights evidenced thereby, a new Rights Certificate
evidencing a number of Rights equivalent to the number of Rights remaining
unexercised shall be issued by the Rights Agent to the registered holder of such
Rights Certificate or to such registered holder's duly authorized assigns,
subject to the provisions of Section 14 hereof.

               (e) Notwithstanding anything in this Agreement to the contrary,
from and after the first occurrence of a Triggering Event, any Rights
beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such, (iii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently with
the Acquiring Person becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for consideration) from the Acquiring Person to
holders of equity interests in such Acquiring Person or to any Person with whom
the Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the a majority of the
Continuing Directors of the Company has determined is part of a plan,
arrangement or understanding which has as a primary purpose or effect the
avoidance of this Section 7(e) or (iv) any subsequent transferee shall become
null and void without any further action and no holder of such Rights shall have
any rights whatsoever with respect to such Rights, whether under any provision
of this Agreement or otherwise. The Company shall use all reasonable efforts to
ensure that the provisions of this Section 7(e) and Section 4(b) hereof are
complied with, but shall have no liability to any holder of Rights Certificates
or to any other Person as a result of its failure to make any determinations
with respect to an Acquiring Person or any of such Acquiring Person's
Affiliates, Associates or transferees hereunder.

               (f) Notwithstanding anything in this Agreement to the contrary,
neither the Rights Agent nor the Company shall be obligated to undertake any
action with respect to a registered holder upon the occurrence of any purported
exercise as set forth in this Section 7 unless such registered holder shall have
(i) completed and signed the certificate contained in the form of election to
purchase set forth on the reverse side of the Rights Certificate surrendered for
such exercise and (ii) provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Company shall reasonably request.

               Section 8. Cancellation and Destruction of Rights Certificates.
All Rights Certificates surrendered for the purpose of exercise, transfer, split
up, combination or exchange shall, if surrendered to the Company or to any of
its agents, be delivered to the Rights Agent for cancellation or in cancelled
form, or, if surrendered to the Rights Agent, shall be cancelled by it, and no
Rights Certificates shall be issued in lieu thereof except as expressly
permitted by any


                                       11.


<PAGE>   15
of the provisions of this Rights Agreement. The Company shall deliver to the
Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Rights Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof. The Rights Agent shall deliver
all cancelled Rights Certificates to the Company, or shall, at the written
request of the Company, destroy such cancelled Rights Certificates, and in such
case shall deliver a certificate of destruction thereof to the Company.

               Section 9. Reservation and Availability of Preferred Stock.

               (a) The Company covenants and agrees that it will use its best
efforts to cause to be reserved and kept available out of and to the extent of
its authorized and unissued Units of Preferred Stock not reserved for another
purpose that will be sufficient to permit the exercise in full of all
outstanding Rights. Upon the occurrence of any events resulting in an increase
in the aggregate number of shares of Preferred Stock (or other equity securities
of the Company) issuable upon exercise of all outstanding Rights above the
number then reserved, the Company shall make appropriate increases in the number
of shares so reserved.

               (b) If the Units of Preferred Stock to be issued and delivered
upon the exercise of the Rights are at any time listed on a national securities
exchange or included for quotation on any transaction reporting system, the
Company shall during the period from the Distribution Date to the Expiration
Date use its best efforts to cause all shares reserved for such issuance to be
listed on such exchange or included for quotation on any such transaction
reporting system upon official notice of issuance upon such exercise.

               (c) The Company shall use its best efforts to (i) file, as soon
as practicable following the earliest date after the first occurrence of a
Section 11(a)(ii) Event in which the consideration to be delivered by the
Company upon exercise of the Rights has been determined in accordance with
Section 11(a)(iii) hereof, or as soon as is required by law following the
Distribution Date, as the case may be, a registration statement under the
Securities Act, with respect to the securities purchasable upon exercise of the
Rights on an appropriate form, (ii) cause such registration statement to become
effective as soon as practicable after such filing and (iii) cause such
registration statement to remain effective (with a prospectus at all times
meeting the requirements of the Securities Act) until the earlier of (A) the
date as of which the Rights are no longer exercisable for such securities and
(B) the Expiration Date. The Company will also take such action as may be
appropriate under, or to ensure compliance with, the securities or "blue sky"
laws of the various states in connection with the exercisability of the Rights.
Notwithstanding any provision of this Agreement to the contrary, the Rights
shall not be exercisable in any jurisdiction, unless the requisite qualification
in such jurisdiction shall have been obtained, or an exemption therefrom shall
be available and until a registration statement has been declared effective.

               (d) The Company covenants and agrees that it will take all such
action as may be necessary to ensure that all Units of Preferred Stock (and,
following the occurrence of a Triggering Event, any other securities that may be
delivered upon exercise of Rights) shall, at the


                                       12.


<PAGE>   16
time of delivery of the certificates for such Units of Preferred Stock (subject
to payment of the Purchase Price), be duly and validly authorized and issued and
fully paid and non-assessable.

               (e) The Company further covenants and agrees that it will pay
when due and payable any and all federal and state transfer taxes and charges
which may be payable in respect of the issuance or delivery of the Rights
Certificates or of any Units of Preferred Stock upon the exercise of Rights. The
Company shall not, however, be required to pay any transfer tax which may be
payable in respect of any transfer or delivery of Rights Certificates to a
person other than, or the issuance or delivery of certificates or depositary
receipts for Units of Preferred Stock in a name other than that of, the
registered holder of the Rights Certificate evidencing Rights surrendered for
exercise or to issue or to deliver any certificates or depositary receipts for
Units of Preferred Stock upon the exercise of any Rights until any such tax
shall have been paid (any such tax being payable by the holder of such Rights
Certificate at the time of surrender) or until it has been established to the
Company's reasonable satisfaction that no such tax is due.

               Section 10. Preferred Stock Record Date. Each person in whose
name any certificate for Units of Preferred Stock (or, following the occurrence
of a Triggering Event, other securities) is issued upon the exercise of Rights
shall for all purposes be deemed to have become the holder of record of the
Units of Preferred Stock (or, following the occurrence of a Triggering Event,
other securities) represented thereby on, and such certificate shall be dated,
the date upon which the Rights Certificate evidencing such Rights was duly
surrendered and payment of the Purchase Price (and any applicable transfer
taxes) was made; provided, however, that if the date of such surrender and
payment is a date upon which the Preferred Stock (or, following the occurrence
of a Triggering Event, other securities) transfer books of the Company are
closed, such person shall be deemed to have become the record holder of such
shares on, and such certificate shall be dated, the next succeeding Business Day
on which the Preferred Stock transfer books of the Company are open; provided
further, however, that if delivery of Units of Preferred Stock is delayed
pursuant to Section 9(c), such Persons shall be deemed to have become the record
holders of such Units of Preferred Stock only when such Units first become
deliverable. Prior to the exercise of the Rights evidenced thereby, the holder
of a Rights Certificate shall not be entitled to any rights of a stockholder of
the Company with respect to securities for which the Rights shall be
exercisable, including, without limitation, the right to vote, to receive
dividends or other distributions or to exercise any preemptive rights, and shall
not be entitled to receive any notice of any proceedings of the Company, except
as provided herein. Prior to the exercise of the Rights evidenced thereby, the
holder of a Rights Certificate shall not be entitled to any rights of a holder
of a Unit of Preferred Stock for which the Rights shall be exercisable,
including, without limitation, the right to vote, to receive dividends or other
distributions or to exercise any preemptive rights, and shall not be entitled to
receive any notice of any proceedings of the Company, except as provided herein.

               Section 11. Adjustment of Purchase Price, Number of Shares or
Number of Rights. The Purchase Price, the number and kinds of securities covered
by each Right and the number of Rights outstanding are subject to adjustment
from time to time as provided in this Section 11.


                                       13.


<PAGE>   17
               (a) (i) In the event the Company shall at any time after the date
        of this Agreement (A) declare a dividend on the Preferred Stock payable
        in shares of Preferred Stock, (B) subdivide the outstanding shares of
        Preferred Stock, (C) combine the outstanding Preferred Stock into a
        smaller number of shares Preferred Stock or (D) issue any shares of its
        capital stock in a reclassification of the Preferred Stock (including
        any such reclassification in connection with a consolidation or merger
        in which the Company is the continuing or surviving corporation), except
        as otherwise provided in this Section 11(a), the Purchase Price in
        effect at the time of the record date for such dividend or of the
        effective date of such subdivision, combination or reclassification, and
        the number and kind of shares of capital stock issuable on such date,
        shall be proportionately adjusted so that the holder of any Rights
        exercised after such time shall be entitled to receive the aggregate
        number and kind of shares of capital stock which, if such Rights had
        been exercised immediately prior to such date and at a time when the
        Preferred Stock transfer books of the Company were open, such holder
        would have owned upon such exercise and been entitled to receive by
        virtue of such dividend, subdivision, combination or reclassification;
        provided, however, that in no event shall the consideration to be paid
        upon the exercise of one Right be less than the aggregate par value of
        the shares of capital stock of the Company issuable upon exercise of one
        Right. If an event occurs which would require an adjustment under both
        this Section 11(a)(i) and Section 11(a)(ii), the adjustment provided for
        in this Section 11(a)(i) shall be in addition to, and shall be made
        prior to, any adjustment required pursuant to Section 11(a)(ii).

                   (ii) Subject to Section 24 of this Agreement, in the event
        that (A) any Acquiring Person or any Associate or Affiliate of any
        Acquiring Person, at any time after the date of this Agreement, directly
        or indirectly, shall (1) merge into the Company or otherwise combine
        with the Company and the Company shall be the continuing or surviving
        corporation of such merger or combination and shares of Company Common
        Stock shall remain outstanding and unchanged, (2) in one transaction or
        a series of transactions, transfer any assets to the Company or any of
        its Subsidiaries in exchange (in whole or in part) for shares of Company
        Common Stock, for other equity securities of the Company or any such
        Subsidiary, or for securities exercisable for or convertible into shares
        of equity securities of the Company or any of its Subsidiaries (whether
        shares of Company Common Stock or otherwise) or otherwise obtain from
        the Company or any of its Subsidiaries, with or without consideration,
        any additional shares of such equity securities or securities
        exercisable for or convertible into such equity securities other than
        pursuant to a pro rata distribution to all holders of shares of Company
        Common Stock, (3) sell, purchase, lease, exchange, mortgage, pledge,
        transfer or otherwise acquire or dispose of, in one transaction or a
        series of transactions, to, from or with the Company or any of its
        Subsidiaries or any employee benefit plan maintained by the Company or
        any of its Subsidiaries or any trustee or fiduciary with respect to such
        plan acting in such capacity, assets (including securities) on terms and
        conditions less favorable to the Company or such Subsidiary or plan than
        those that could have been obtained in arm's- length negotiations with
        an unaffiliated third party, other than pursuant to a transaction set
        forth in Section 13(a) hereof, (4) sell, purchase, lease, exchange,
        mortgage, pledge,


                                       14.


<PAGE>   18
        transfer or otherwise acquire or dispose of, in one transaction or a
        series of transactions, to, from or with the Company or any of its
        Subsidiaries or any employee benefit plan maintained by the Company or
        any of its Subsidiaries or any trustee or fiduciary with respect to such
        plan acting in such capacity (other than transactions, if any,
        consistent with those engaged in, as of the date hereof, by the Company
        and such Acquiring Person or such Associate or Affiliate), assets
        (including securities or intangible assets) having an aggregate fair
        market value of more than $5,000,000, other than pursuant to a
        transaction set forth in Section 13(a) hereof, (5) receive, or any
        designee, agent or representative of such Acquiring Person or any
        Affiliate or Associate of such Acquiring Person shall receive, any
        compensation from the Company or any of its Subsidiaries other than
        compensation for full-time employment as a regular employee at rates in
        accordance with the Company's (or its Subsidiaries') past practices, or
        (6) receive the benefit, directly or indirectly (except proportionately
        as a holder of shares of Company Common Stock or as required by law or
        governmental regulation), of any loans, advances, guarantees, pledges or
        other financial assistance or any tax credits or other tax advantages
        provided by the Company or any of its Subsidiaries or any employee
        benefit plan maintained by the Company or any of its Subsidiaries or any
        trustee or fiduciary with respect to such plan acting in such capacity;
        or (B) any Person shall become an Acquiring Person, unless the event
        causing the Person to become an Acquiring Person is a transaction set
        forth in Section 13(a); or (C) during such time as there is an Acquiring
        Person, there shall be any reclassification of securities (including any
        reverse stock split), or recapitalization of the Company, or any merger
        or consolidation of the Company with any of its Subsidiaries or any
        other transaction or series of transactions involving the Company or any
        of its Subsidiaries, other than a transaction or transactions to which
        the provisions of Section 13(a) apply (whether or not with or into or
        otherwise involving an Acquiring Person), which has the effect, directly
        or indirectly, of increasing by more than 1% the proportionate share of
        the outstanding shares of any class of equity securities of the Company
        or any of its Subsidiaries that is directly or indirectly beneficially
        owned by any Acquiring Person or any Person or any Associate or
        Affiliate of any Acquiring Person;

then promptly following the occurrence of an event described in Section
11(a)(ii)(A), (B) or (C) (a "Section 11(a)(ii) Event"), proper provision shall
be made so that each holder of a Right, except as provided in Section 7(e)
hereof, shall thereafter have the right to receive for each Right, upon exercise
thereof in accordance with the terms of this Agreement and payment of the
then-current Purchase Price, in lieu of the number of Units of Preferred Stock
for which a Right was exercisable immediately prior to the first occurrence of a
Section 11(a)(ii) Event, such number of Units of Preferred Stock as shall equal
the result obtained by multiplying the then-current Purchase Price by the then
number of Units of Preferred Stock for which a Right was exercisable (or would
have been exercisable if the Distribution Date had occurred) immediately prior
to the first occurrence of a Triggering Event, and dividing that product by 50%
of the current per share market price (determined pursuant to Section 11(d)
hereof) for shares of Common Stock on the date of occurrence of the Triggering
Event (such number of Units of Preferred Stock being hereinafter referred to as
the "Adjustment Shares").


                                       15.


<PAGE>   19
                  (iii) In the event that the number of Units of Preferred Stock
        which are authorized by the Company's Fifth Amended and Restated
        Certificate of Incorporation but not outstanding or reserved for
        issuance for purposes other than upon exercise of the Rights are not
        sufficient to permit the exercise in full of the Rights, or if any
        necessary regulatory approval for such issuance has not been obtained by
        the Company, the Company shall, in lieu of issuing Units of Preferred
        Stock in accordance with Section 11(a)(ii) hereof, upon approval by a
        majority of the Continuing of Directors of the Company: (A) determine
        the excess of (1) the value of the Units of Preferred Stock issuable
        upon the exercise of a Right (the "Current Value") over (2) the Purchase
        Price (such excess being referred to as the "Spread") and (B) with
        respect to each Right, make adequate provision to substitute for such
        Units of Preferred Stock, upon exercise of the Rights, (1) cash, (2) a
        reduction in the Purchase Price, (3) other equity securities of the
        Company (including, without limitation, Common Stock or shares or units
        of shares of any series of preferred stock which the Board of Directors
        of the Company, upon approval by a majority of the Continuing Directors,
        has deemed to have the same value as the Units of Preferred Stock (such
        shares or units of preferred stock are herein called "preferred stock
        equivalents")), except to the extent that the Company has not obtained
        any necessary regulatory approval for such issuance, (4) debt securities
        of the Company, except to the extent that the Company has not obtained
        any necessary regulatory approval for such issuance, (5) other assets or
        (6) any combination of the foregoing, having an aggregate value equal to
        the Current Value, where such aggregate value has been determined by the
        Board of Directors of the Company, upon approval by a majority of the
        Continuing Directors, based upon the advice of a nationally recognized
        investment banking firm selected by the Board of Directors of the
        Company, upon approval by a majority of the Continuing Directors;
        provided, however, if the Company shall not have made adequate provision
        to deliver value pursuant to clause (B) above within thirty (30) days
        following the later of (x) occurrence of a Section 11(a)(ii) Event, and
        (y) the date on which the Company's right of redemption pursuant to
        Section 23(a) expires (the later of (x) and (y) being referred to herein
        as the "Section 11(a)(iii) Trigger Date"), then the Company shall be
        obligated to deliver, upon the surrender for exercise of a Right and
        without requiring payment of the Purchase Price, Units of Preferred
        Stock (to the extent available), and then, if necessary, cash, which
        Units and/or cash have an aggregate value equal to the Spread.

               (b) In the event that the Company shall fix a record date for the
issuance of rights, options or warrants to all holders of Units of Preferred
Stock entitling them (for a period expiring within 45 calendar days after such
record date) to subscribe for or purchase Units of Preferred Stock (or shares
having the same rights, privileges and preferences as the Preferred Stock
("equivalent preferred stock")) or securities convertible into Units of
Preferred Stock or equivalent preferred stock at a price per Unit of Preferred
Stock or equivalent preferred share (or having a conversion price per share, if
a security convertible into Units of Preferred Stock or equivalent preferred
stock) less than the then current per share market price of a Unit of Preferred
Stock (as determined pursuant to Section 11(d)) on such record date, the
Purchase Price to be in effect after such record date shall be determined by
multiplying the Purchase Price in effect


                                       16.


<PAGE>   20
immediately prior to such record date by a fraction, the numerator of which
shall be the number of Units of Preferred Stock outstanding on such record date
plus the number of Units of Preferred Stock which the aggregate offering price
of the total number of Units of Preferred Stock and/or equivalent preferred
stock so to be offered (and/or the aggregate initial conversion price of the
convertible securities so to be offered) would purchase at such current market
price and the denominator of which shall be the number of Units of Preferred
Stock outstanding on such record date plus the number of additional Units of
Preferred Stock and/or equivalent preferred stock to be offered for subscription
or purchase (or into which the convertible securities so to be offered are
initially convertible). In case such subscription price may be paid in a
consideration part or all of which shall be in a form other than cash, the value
of such consideration shall be as determined in good faith by a majority of the
Continuing Directors of the Company, whose determination shall be described in a
statement filed with the Rights Agent and shall be binding on the Rights Agent
and the holders of the Rights. Units of Preferred Stock owned by or held for the
account of the Company shall not be deemed outstanding for the purpose of any
such computation. Such adjustment shall be made successively whenever such a
record date is fixed; and in the event that such rights, options or warrants are
not so issued, the Purchase Price shall be adjusted to be the Purchase Price
which would then be in effect if such record date had not been fixed.

               (c) In case the Company shall fix a record date for a
distribution to all holders of Units of Preferred Stock (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of
indebtedness, cash (other than a regular quarterly cash dividend) assets (other
than a dividend payable in Units of Preferred Stock but including any dividend
payable in equity securities other than Preferred Stock) or subscription rights
or warrants (excluding those referred to in Section 11(d) hereof), the Purchase
Price to be in effect after such record date shall be determined by multiplying
the Purchase Price in effect immediately prior to such record date by a
fraction, the numerator of which shall be the then current per share market
price (as determined pursuant to Section 11(d)) of the Preferred Stock on such
record date, less the fair market value (as determined in good faith by a
majority of the Continuing Directors of the Company, whose determination shall
be described in a statement filed with the Rights Agent and shall be binding on
the Rights Agent and the holder of rights) of the cash, assets or evidences of
indebtedness to be distributed or of such subscription rights or warrants
distributable in respect of a share of Preferred Stock and the denominator of
which shall be such current per share market price (as determined pursuant to
Section 11(d)) of a share of Preferred Stock. Such adjustments shall be made
successively whenever such a record date is fixed; and in the event that such
distribution is not so made, the Purchase Price shall again be adjusted to be
the Purchase Price which would then be in effect if such record date had not
been fixed.

               (d) (i) For the purpose of any computation hereunder, the
        "current per share market price" of any security (a "Security" for the
        purpose of this Section 11(d)(i)) on any date shall be deemed to be the
        average of the daily closing prices per share of such Security for the
        thirty (30) consecutive Trading Days (as such term is hereinafter
        defined) immediately prior to such date; provided, however, that in the
        event that the "current per


                                       17.


<PAGE>   21
        share market price" of the Security is determined during a period
        following the announcement by the issuer of such Security of (A) a
        dividend or distribution on such Security payable in shares of such
        Security or securities convertible into such shares, or (B) any
        subdivision, combination or reclassification of such Security and prior
        to the expiration of thirty (30) Trading Days after the ex-dividend date
        for such dividend or distribution, or the record date for such
        subdivision, combination or reclassification, then, and in each such
        case, the "current per share market price" shall be appropriately
        adjusted to reflect the "current market price" per share equivalent of
        such Security. The closing price for each day shall be the last sale
        price, regular way, or, in case no such sale takes place on such day,
        the average of the closing bid and asked prices, regular way, in either
        case as reported in the principal consolidated transaction reporting
        system with respect to securities listed or admitted to trading on the
        Nasdaq National Market System ("NASDAQ") or, if the Security is not
        listed or admitted to trading on the NASDAQ, as reported in the
        principal consolidated transaction reporting system with respect to
        securities listed on the principal national securities exchange on which
        the Security is listed or admitted to trading or, if the Security is not
        listed or admitted to trading on any national securities exchange, the
        last quoted price or, if not so quoted, the average of the high bid and
        low asked prices in the over-the-counter market, as reported by the
        NASDAQ or such other system then in use, or, if on any such date the
        Security is not quoted by any such organization, the average of the
        closing bid and asked prices as furnished by a professional market maker
        making a market in the Security selected by a majority of the Continuing
        Directors. If on any such date no market maker is making a market in the
        Security, the "current per share market price" of such Security on such
        date as determined in good faith by the Board of Directors of the
        Company, as provided for above shall be used. The term "Trading Day"
        shall mean a day on which the principal national securities exchange on
        which the Security is listed or admitted to trading is open for the
        transaction of business or, if the Security is not listed or admitted to
        trading on any national securities exchange, a Business Day.

                   (ii) For the purpose of any computation hereunder, the
        "current per share market price" of the Preferred Stock shall be
        determined in accordance with the method set forth in Section 11(d)(i).
        If the "current per share market price" of the Preferred Stock cannot be
        determined in the manner provided above or if the Preferred Stock is not
        publicly held or listed or traded in a manner described in clause (i) of
        this Section 11(d), the "current per share market price" of the
        Preferred Stock shall be conclusively deemed to be an amount equal to
        $1,000 (as such amount may be appropriately adjusted for such events as
        stock splits, stock dividends and recapitalizations with respect to
        shares of Company Common Stock occurring after the date of this
        Agreement) multiplied by the current market price per share of Company
        Common Stock. If shares of neither the Company Common Stock nor
        Preferred Stock is publicly held or so listed or traded, "current per
        share market price" of the Preferred Stock shall mean the fair value per
        share as determined in good faith by the Board of Directors of the
        Company, upon approval by a majority of the Continuing Directors, whose
        determination shall be described in a


                                       18.


<PAGE>   22
        statement filed with the Rights Agent and shall be binding on the Rights
        Agent and the holders of the Rights.

               (e) No adjustment in the Purchase Price shall be required unless
such adjustment would require an increase or decrease of at least 1% in the
Purchase Price; provided, however, that any adjustments which by reason of this
Section 11(e) are not required to be made shall be carried forward and taken
into account in any subsequent adjustment. All calculations under this Section
11 shall be made to the nearest cent or to the nearest one one-thousandth of a
share of Preferred Stock or one one-hundredth of any other share or security as
the case may be. Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three years from the date of the transaction which requires such
adjustment or (ii) the Expiration Date.

               (f) If as a result of an adjustment made pursuant to Section
11(a)(ii) hereof, the holder of any Rights thereafter exercised shall become
entitled to receive any shares of capital stock of the Company other than Units
of Preferred Stock, thereafter the number of such other shares so receivable
upon exercise of any Rights and the Purchase Price thereof shall be subject to
adjustment from time to time in a manner and on terms as nearly equivalent as
practicable to the provisions with respect to the Preferred Stock contained in
Section 11(a), (b), (c), (d), (e), (g), (h), (i), (j), (k), (l) and (m), and the
provisions of Sections 7, 9, 10, 13 and 14 with respect to the Preferred Stock
shall apply on like terms to any such other shares.

               (g) All Rights originally issued by the Company subsequent to any
adjustment made to the Purchase Price hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of Units of Preferred Stock
purchasable from time to time hereunder upon exercise of the Rights, all subject
to further adjustment as provided herein.

               (h) Unless the Company shall have exercised its election as
provided in Section 11(i), upon each adjustment of the Purchase Price as a
result of the calculations made in Sections 11(b) and (c), each Right
outstanding immediately prior to the making of such adjustment shall thereafter
evidence the right to purchase, at the adjusted Purchase Price, that number of
Units of Preferred Stock (calculated to the nearest one-millionth of a share of
Preferred Stock) obtained by dividing (i) the product obtained by multiplying
(x) the number of Units of Preferred Stock covered by a Right immediately prior
to this adjustment by (y) the Purchase Price in effect immediately prior to such
adjustment of the Purchase Price by, (ii) the Purchase Price in effect
immediately after such adjustment of the Purchase Price.

               (i) The Company may elect on or after the date of any adjustment
of the Purchase Price to adjust the number of Rights, in substitution for any
adjustment in the number of Units of Preferred Stock purchasable upon the
exercise of a Right. Each of the Rights outstanding after such adjustment of the
number of Rights shall be exercisable for the number of Units of Preferred Stock
for which a Right was exercisable immediately prior to such adjustment. Each
Right held of record prior to such adjustment of the number of Rights shall
become that number of Rights (calculated to the nearest one one-thousandth)
obtained by dividing


                                       19.


<PAGE>   23
the Purchase Price in effect immediately prior to adjustment of the Purchase
Price by the Purchase Price in effect immediately after adjustment of the
Purchase Price. The Company shall make a public announcement of its election to
adjust the number of Rights, indicating the record date for the adjustment, and,
if known at the time, the amount of the adjustment to be made. This record date
may be the date on which the Purchase Price is adjusted or any day thereafter,
but, if the Rights Certificates have been issued, shall be at least ten days
later than the date of the public announcement. If Rights Certificates have been
issued, upon each adjustment of the number of Rights pursuant to this Section
11(i), the Company shall, as promptly as practicable, cause to be distributed to
holders of record of Rights Certificates on such record date Rights Certificates
evidencing, subject to Section 14 hereof, the additional Rights to which such
holders shall be entitled as a result of such adjustment, or, at the option of
the Company, shall cause to be distributed to such holders of record in
substitution and replacement for the Rights Certificates held by such holders
prior to the date of adjustment, and upon surrender thereof, if required by the
Company, new Rights Certificates evidencing all the Rights to which such holders
shall be entitled after such adjustment. Rights Certificates to be so
distributed shall be issued, executed and countersigned in the manner provided
for herein and shall be registered in the names of the holders of record of
Rights Certificates on the record date specified in the public announcement.

               (j) Irrespective of any adjustment or change in the Purchase
Price or the number of Units of Preferred Stock issuable upon the exercise of
the Rights, the Rights Certificates theretofore and thereafter issued may
continue to express the Purchase Price per Unit and the number of Units of
Preferred Stock which were expressed in the initial Rights Certificates issued
hereunder.

               (k) Before taking any action that would cause an adjustment
reducing the Purchase Price below the then par value of the number of Units of
Preferred Stock issuable upon exercise of the Rights, the Company shall take any
corporate action which may, in the opinion of its counsel, be necessary in order
that the Company may validly and legally issue fully paid and nonassessable
number of Units of Preferred Stock at such adjusted Purchase Price.

               (l) In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuing to the holder of any Rights exercised after such record date
of that number of Units of Preferred Stock and other capital stock or securities
of the Company, if any, issuable upon such exercise over and above the Units of
Preferred Stock and other capital stock or securities of the Company, if any,
issuable upon such exercise on the basis of the Purchase Price in effect prior
to such adjustment; provided, however, that the Company shall deliver to such
holder a due bill or other appropriate instrument evidencing such holder's right
to receive such additional shares (fractional or otherwise) upon the occurrence
of the event requiring such adjustment.

               (m) Anything in this Section 11 to the contrary notwithstanding,
the Company shall be entitled to make such reductions in the Purchase Price, in
addition to those adjustments expressly required by this Section 11, as and to
the extent that it in its sole discretion shall


                                       20.


<PAGE>   24
determine to be advisable in order that any (i) consolidation or subdivision of
the Preferred Stock, (ii) issuance wholly for cash of any Unit of Preferred
Stock at less than the current market price, (iii) issuance wholly for cash of
Preferred Stock or securities which by their terms are convertible into or
exchangeable for Preferred Stock, (iv) dividends on Preferred Stock payable in
Preferred Stock or (v) issuance of rights, options or warrants referred to in
this Section 11, hereafter made by the Company to holders of Units of its
Preferred Stock shall not be taxable to such stockholders.

               (n) The Company shall not, at any time after the Distribution
Date, (i) consolidate with any other Person (other than a Subsidiary of the
Company in a transaction which complies with Section 11(o)), (ii) merge with or
into any other Person (other than a Subsidiary of the Company in a transaction
which complies with Section 11(o)), or (iii) sell or transfer (or permit any
Subsidiary to sell or transfer), in one transaction, or a series of
transactions, assets or earning power aggregating more than 50% of the assets or
earning power of the Company and its Subsidiaries (taken as a whole) to any
other Person or Persons (other than the Company and/or any of its Subsidiaries
in one or more transactions each of which complies with Section 11(o)), if (x)
at the time of or immediately after such consolidation, merger or sale there are
any rights, warrants or other instruments or securities outstanding or
agreements in effect which would substantially diminish or otherwise eliminate
the benefits intended to be afforded by the Rights or (y) prior to,
simultaneously with or immediately after such consolidation, merger or sale, the
Person which constitutes, or would constitute the "Principal Party" for purposes
of Section 13(a) shall have distributed or otherwise transferred to its
stockholders or other persons holding an equity interest in such Person Rights
previously owned by such Person or any of its Affiliates and Associates;
provided, however, this Section 11(n) shall not affect the ability of any
Subsidiary of the Company to consolidate with, merge with or into, or sell or
transfer assets or earning power to, any other Subsidiary of the Company.

               (o) After the Distribution Date, the Company shall not, except as
permitted by Section 23 or Section 26, take (or permit any Subsidiary to take)
any action if at the time such action is taken it is reasonably foreseeable that
such action will diminish substantially or otherwise eliminate the benefits
intended to be afforded by the Rights.

               (p) In the event that, at any time after the date of this
Agreement and prior to the Distribution Date, the Company shall (i) declare or
pay any dividend on outstanding shares of Common Stock payable in shares of
Common Stock or (ii) effect a subdivision, combination or consolidation of the
Common Stock (by reclassification or otherwise than by payment of dividends in
shares of Common Stock) into a greater or lesser number of shares of Common
Stock, then in any such case the number of Units of Preferred Stock purchasable
after such event upon proper exercise of each Right shall be determined by
multiplying the number of Units of Preferred Stock so purchasable immediately
prior to such event by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately before such event and the
denominator of which is the number of shares of Common Stock outstanding
immediately after such event. The adjustments provided for in this Section 11(p)
shall be made successively


                                       21.


<PAGE>   25
whenever such a dividend is declared or paid or such a subdivision, combination
or consolidation is effected.

               Section 12. Certificate of Adjusted Purchase Price or Number of
Shares. Whenever an adjustment is made as provided in Sections 11 and 13 hereof,
the Company shall promptly (a) prepare a certificate setting forth such
adjustment, and a brief statement of the facts accounting for such adjustment,
(b) file with the Rights Agent and with each transfer agent for the shares of
Common Stock or Units of Preferred Stock a copy of such certificate and (c) mail
a brief summary thereof to each holder of a Rights Certificate in accordance
with Section 25 hereof. Notwithstanding the foregoing sentence, the failure by
the Company to make such certification or give such notice shall not affect the
validity of or the force or effect of the requirement for such adjustment. The
Rights Agent shall be fully protected in relying on any such certificate and on
any adjustment contained therein and shall not be deemed to have knowledge of
such adjustment unless and until it shall have received such certificate.

               Section 13. Consolidation, Merger or Sale or Transfer of Assets
or Earning Power.

               (a) Except as provided in Section 13(b) hereof, in the event
that, following a Shares Acquisition Date, directly or indirectly, (x) the
Company shall consolidate with, or merge with and into, any other Person (other
than a Subsidiary of the Company in a transaction which complies with Section
11(o)), and the Company shall not be the continuing or surviving corporation of
such consolidation or merger, (y) any Person (other than a Subsidiary of the
Company in a transaction which complies with Section 11(o)) shall consolidate
with the Company, or merge with and into the Company and the Company shall be
the continuing or surviving corporation of such consolidation or merger and, in
connection with such consolidation or merger, all or part of the shares of
Common Stock shall be changed into or exchanged for stock or other securities of
any other Person or cash or any other property, or (z) the Company shall sell or
otherwise transfer (or one or more of its Subsidiaries shall sell or otherwise
transfer) to any Person or Persons (other than a Subsidiary of the Company in a
transaction which complies with Section 11(o)), in one or more transactions,
directly or indirectly, assets or earning power aggregating 50% or more of the
assets or earning power of the Company and its Subsidiaries (taken as a whole),
(any such event being a "Section 13 Event"), then, and in each such case, proper
provision shall be made so that: (i) each holder of a Right, except as provided
in Section 7(e), shall thereafter have the right to receive, upon the exercise
thereof at the then current Purchase Price, such number of validly authorized
and issued, fully paid and non-assessable shares of Common Stock of the
Principal Party (as such term is hereinafter defined), which shares shall not be
subject to any liens, encumbrances, rights of first refusal, transfer
restrictions or other adverse claims, as shall be equal to the result obtained
by (1) multiplying the then current Purchase Price by the number of Units of
Preferred Stock for which a Right is exercisable immediately prior to the first
occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has occurred
prior to the first occurrence of a Section 13 Event, multiplying the number of
such Units of Preferred Stock for which a Right would be exercisable hereunder
but for the occurrence of such Section 11(a)(ii) Event by the Purchase Price
which


                                       22.


<PAGE>   26
would be in effect hereunder but for such first occurrence) and (2) dividing
that product (which, following the direct occurrence of a Section 13 Event,
shall be the "Purchase Price" for all purposes of this Agreement) by 50% of the
current per share market price (determined pursuant to Section 11(d)) of the
shares of Common Stock of such Principal Party on the date of consummation of
such Section 13 Event; (ii) such Principal Party shall thereafter be liable for,
and shall assume, by virtue of such Section 13 Event, all the obligations and
duties of the Company pursuant to this Agreement; (iii) the term "Company"
shall, for all purposes of this Agreement, thereafter be deemed to refer to such
Principal Party, it being specifically intended that the provisions of Section
11 shall apply only to such Principal Party following the first occurrence of a
Section 13 Event; (iv) such Principal Party shall take such steps (including,
but not limited to, the reservation of a sufficient number of shares of its
Common Stock) in connection with the consummation of any such transaction as may
be necessary to ensure that the provisions of this Agreement shall thereafter be
applicable to its shares of Common Stock thereafter deliverable upon the
exercise of the Rights; and (v) the provisions of Section 11(a)(ii) shall be of
no further effect following the first occurrence of any Section 13 Event.

               (b) "Principal Party" shall mean:

                    (i) in the case of any transaction described in clause (x)
        or (y) of the first sentence of Section 13(a), (A) the Person that is
        the issuer of any securities into which shares of Company Common Stock
        are converted in such merger or consolidation, or, if there is more than
        one such issuer, the issuer of shares of Common Stock that has the
        highest aggregate current market price (determined pursuant to Section
        11(d)) and (B) if no securities are so issued, the Person that is the
        other party to such merger or consolidation, or, if there is more than
        one such Person, the Person the Common Stock of which has the highest
        aggregate current market price (determined pursuant to Section 11(d));
        and

                   (ii) in the case of any transaction described in clause (z)
        of the first sentence of Section 13(a), the Person that is the party
        receiving the largest portion of the assets or earning power transferred
        pursuant to such transaction or transactions, or, if each Person that is
        a party to such transaction or transactions receives the same portion of
        the assets or earning power transferred pursuant to such transaction or
        transactions or if the Person receiving the largest portion of the
        assets or earning power cannot be determined, whichever Person the
        Common Stock of which has the highest aggregate current market price
        (determined pursuant to Section 11(d)); provided, however, that in any
        such case, (1) if the Common Stock of such Person is not at such time
        and has not been continuously over the preceding twelve-month period
        registered under Section 12 of the Exchange Act ("Registered Common
        Stock"), or such Person is not a corporation, and such Person is a
        direct or indirect Subsidiary of another Person that has Registered
        Common Stock outstanding, "Principal Party" shall refer to such other
        Person; (2) if the Common Stock of such Person is not Registered Common
        Stock or such Person is not a corporation, and such Person is a direct
        or indirect Subsidiary of another Person but is not a direct or indirect
        Subsidiary of another Person which has Registered Common Stock


                                       23.


<PAGE>   27
        outstanding, "Principal Party" shall refer to the ultimate parent entity
        of such first-mentioned Person; (3) if the Common Stock of such Person
        is not Registered Common Stock or such Person is not a corporation, and
        such Person is directly or indirectly controlled by more than one
        Person, and one or more of such other Persons has Registered Common
        Stock outstanding, "Principal Party" shall refer to whichever of such
        other Persons is the issuer of the Registered Common Stock having the
        highest aggregate current per share market price (determined pursuant to
        Section 11(d)); and (4) if the Common Stock of such Person is not
        Registered Common Stock or such Person is not a corporation, and such
        Person is directly or indirectly controlled by more than one Person, and
        none of such other Persons has Registered Common Stock outstanding,
        "Principal Party" shall refer to whichever ultimate parent entity is the
        corporation having the greatest stockholders' equity or, if no such
        ultimate parent entity is a corporation, shall refer to whichever
        ultimate parent entity is the entity having the greatest net assets.

               (c) The Company shall not consummate any such consolidation,
merger, sale or transfer unless the Principal Party shall have a sufficient
number of authorized shares of Common Stock which have not been issued or
reserved for issuance to permit the exercise in full of the Rights in accordance
with this Section 13, and unless prior thereto the Company and such Principal
Party shall have executed and delivered to the Rights Agent a supplemental
agreement providing for the terms set forth in paragraphs (a) and (b) of this
Section 13 and further providing that the Principal Party will:

                    (i) (A) file on an appropriate form, as soon as practicable
        following the execution of such agreement, a registration statement
        under the Securities Act with respect to the shares of Common Stock that
        may be acquired upon exercise of the Rights, (B) cause such registration
        statement to remain effective (and to include a prospectus complying
        with the requirements of the Securities Act) until the Expiration Date,
        and (C) as soon as practicable following the execution of such agreement
        take such action as may be required to ensure that any acquisition of
        such shares of Common Stock upon the exercise of the Rights complies
        with any applicable state securities or "blue sky" laws; and

                   (ii) deliver to holders of the Rights historical financial
        statements for the Principal Party and each of its Affiliates which
        comply in all respects with the requirements for registration on Form 10
        under the Exchange Act.

               (d) In case the Principal Party which is to be a party to a
transaction referred to in this Section 13 has a provision in any of its
authorized securities or in its Certificate of Incorporation or Bylaws or other
instrument governing its corporate affairs, which provision would have the
effect of (i) causing such Principal Party to issue, in connection with, or as a
consequence of, the consummation of a transaction referred to in this Section
13, shares of Common Stock of such Principal Party at less than the then current
market price per share (determined pursuant to Section 11(d)) or securities
exercisable for, or convertible into, shares of Common Stock of such Principal
Party at less than such then current marker price (other than to holders of
Rights pursuant to this Section 13) or (ii) providing for any special payment,
tax


                                       24.


<PAGE>   28
or similar provisions in connection with the issuance of the shares of Common
Stock of such Principal Party pursuant to the provisions of this Section 13,
then, in such event, the Company shall not consummate any such transaction
unless prior thereto the Company and such Principal Party shall have executed
and delivered to the Rights Agent a supplemental agreement providing that the
provision in question of such Principal Party shall have been cancelled, waived
or amended, or that the authorized securities shall be redeemed, so that the
applicable provision will have no effect in connection with, or as a consequence
of, the consummation of the proposed transaction.

               (e) The provisions of this Section 13 shall similarly apply to
successive mergers or consolidations or sales or other transfers. In the event
that a Section 13 Event shall occur at any time after the occurrence of a
Section 11(a)(ii) Event, the Rights which have not theretofore been exercised
shall thereafter become exercisable in the manner described in Section 13(a).

               Section 14. Fractional Rights and Fractional Shares.

               (a) The Company shall not be required to issue fractions of
Rights or to distribute Rights Certificates which evidence fractional Rights. In
lieu of such fractional Rights, there shall be paid to the registered holders of
the Rights Certificates with regard to which such fractional Rights would
otherwise be issuable, an amount in cash equal to the same fraction of the
current market value of a whole Right. For the purposes of this Section 14(a),
the current market value of a whole Right shall be the closing price of the
Rights for the Trading Day immediately prior to the date on which such
fractional Rights would have been otherwise issuable. The closing price for any
day shall be the last sale price, regular way, or, in case no such sale takes
place on such day, the average of the closing bid and asked prices, regular way,
in either case as reported in the principal consolidated transaction reporting
system with respect to securities listed or admitted to trading on the NASDAQ
or, if the Rights are not listed or admitted to trading on the NASDAQ, as
reported in the principal consolidated transaction reporting system with respect
to securities listed on the principal national securities exchange on which the
Rights are listed or admitted to trading or, if the Rights are not listed or
admitted to trading on any national securities exchange, the last quoted price
or, if not so quoted, the average of the high bid and low asked prices in the
over-the-counter market, as reported by NASDAQ or such other system then in use
or, if on any such date the Rights are not quoted by any such organization, the
average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Rights selected by the Directors. If on any
such date no such market maker is making a market in the Rights, the fair value
of the Rights on such date, as determined in good faith by the Board of
Directors of the Company, upon approval by a majority of the Continuing
Directors, shall be used.

               (b) The Company shall not be required to issue fractions of
Preferred Stock (other than fractions which are integral multiples of one
one-thousandth of a share of Preferred Stock) upon exercise of the Rights or to
distribute certificates which evidence fractional Preferred Stock (other than
fractions which are integral multiples of one one-thousandth of a share of


                                       25.


<PAGE>   29
Preferred Stock). Fractions of Preferred Stock in integral multiples of one
one-thousandth of a share of Preferred Stock may, at the election of the
Company, be evidenced by depositary receipts, pursuant to an appropriate
agreement between the Company and a depositary selected by it; provided,
however, that such agreement shall provide that the holders of such depositary
receipts shall have all the rights, privileges and preferences to which they are
entitled as beneficial owners of the Preferred Stock represented by such
depositary receipts. In lieu of fractional shares of Preferred Stock that are
not integral multiples of one one-thousandth of a share of Preferred Stock, the
Company shall pay to the registered holders of Rights Certificates at the time
such Rights are exercised as herein provided an amount in cash equal to the same
fraction of the current market value of one share of Preferred Stock as
determined pursuant to Section 11(d).

               (c) The holder of a Right by the acceptance of the Right
expressly waives such holder's right to receive any fractional Rights or any
fractional shares upon exercise of a Right (except as provided above).

               Section 15. Rights of Action. All rights of action in respect of
this Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of
certificates representing shares of Common Stock); and any registered holder of
any Rights Certificate (or, prior to the Distribution Date, a certificate
representing shares of Common Stock), without the consent of the Rights Agent or
of the holder of any other Rights Certificate (or, prior to the Distribution
Date, of a certificate representing shares of Common Stock), may, in such
holder's own behalf and for such holder's own benefit, enforce, and may
institute and maintain any suit, action or proceeding against the Company to
enforce, or otherwise act in respect of, such holder's right to exercise the
Rights evidenced by such Rights Certificate in the manner provided in such
Rights Certificate and in this Agreement. Without limiting the foregoing or any
remedies available to the holders of Rights, it is specifically acknowledged
that the holders of Rights would not have an adequate remedy at law for any
breach of this Agreement and will be entitled to specific performance of the
obligations hereunder, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to this Agreement.

               Section 16. Agreement of Rights Holders. Every holder of a Right,
by accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

               (a) prior to the Distribution Date, the Rights will be
transferable only in connection with the transfer of shares of the Company's
Common Stock;

               (b) after the Distribution Date, the Rights Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the office of the Rights Agent designated for such purpose, duly endorsed or
accompanied by a proper instrument of transfer;


                                       26.


<PAGE>   30
               (c) subject to Sections 6(a) and 7(f) hereof, the Company and the
Rights Agent may deem and treat the person in whose name the Rights Certificate
(or, prior to the Distribution Date, the associated Common Stock certificate) is
registered as the absolute owner thereof and of the Rights evidenced thereby
(notwithstanding any notations of ownership or writing on the Rights
Certificates or the associated Common Stock certificate made by anyone other
than the Company or the Rights Agent) for all purposes whatsoever, and neither
the Company nor the Rights Agent shall be affected by any notice to the
contrary; and

               (d) notwithstanding anything in this Agreement to the contrary,
neither the Company nor the Rights Agent shall have any liability to any holder
of a Right or other Person as a result of its inability to perform any of its
obligations under this Agreement by reason of any preliminary or permanent
injunction or other order, decree or ruling issued by a court of competent
jurisdiction or by a governmental, regulatory or administrative agency or
commission, or any statute, rule, regulation or executive order promulgated or
enacted by any governmental authority, prohibiting or otherwise restraining
performance of such obligation; provided, however, the Company must use its best
efforts to have any such order, decree or ruling lifted or otherwise overturned
as soon as possible.

               Section 17. Rights Certificate Holder Not Deemed a Stockholder.
No holder, as such, of any Rights Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Units of Preferred
Stock or any other securities of the Company which may at any time be issuable
upon the exercise of the Rights represented thereby, nor shall anything
contained herein or in any Rights Certificate be construed to confer upon the
holder of any Rights Certificate, as such, any of the rights of a stockholder of
the Company or any right to vote for the election of directors or upon any
matter submitted to stockholders at any meeting thereof, or to give or withhold
consent to any corporate action, or to receive notice of meetings or other
actions affecting stockholders (except as provided in Section 25 hereof), or to
receive dividends or subscription rights, or otherwise, until the Right or
Rights evidenced by such Rights Certificate shall have been exercised in
accordance with the provisions hereof.

               Section 18. Concerning the Rights Agent. The Company agrees to
pay to the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability, or expense, incurred without
gross negligence, or willful misconduct on the part of the Rights Agent, for any
action taken, suffered or omitted by the Rights Agent in connection with the
execution, acceptance and administration of this Agreement and the exercise and
performance hereunder of its duties, including the costs and expenses of
defending against and appealing any claim of liability in the premises. The
indemnity provided herein shall survive the termination of this Agreement and
the expiration of the Rights. The costs and expenses incurred in enforcing this
right of indemnification shall be paid by the Company.


                                       27.


<PAGE>   31
               The Rights Agent may conclusively rely upon and shall be
protected and shall incur no liability for, or in respect of any action taken,
suffered or omitted by it in connection with, its administration of this
Agreement and the exercise and performance of its duties hereunder in reliance
upon any Rights Certificate or certificate for Units of Preferred Stock or
shares of Common Stock or for other securities of the Company, instrument of
assignment or transfer, power of attorney, endorsement, affidavit, letter,
notice, direction, consent, certificate, statement, or other paper or document
believed by it to be genuine and to be signed, executed and, where necessary,
verified or acknowledged, by the proper person or persons, or otherwise upon the
advice of counsel as set forth in Section 20 hereof.

               Section 19. Merger or Consolidation or Change of Name of Rights
Agent.

               (a) Any corporation into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the stock transfer or corporate trust business of the Rights Agent or any
successor Rights Agent, shall be the successor to the Rights Agent under this
Agreement without the execution or filing of any paper or any further act on the
part of any of the parties hereto, provided that such corporation would be
eligible for appointment as a successor Rights Agent under the provisions of
Section 21 hereof. In case at the time such successor Rights Agent shall succeed
to the agency created by this Agreement any of the Rights Certificates shall
have been countersigned but not delivered, any such successor Rights Agent may
adopt the countersignature of the predecessor Rights Agent and deliver such
Rights Certificates so countersigned; and in case at that time any of the Rights
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Rights Certificates either in the name of the predecessor
Rights Agent or in the name of the successor Rights Agent; and in all such cases
such Rights Certificates shall have the full force provided in the Rights
Certificates and in this Agreement.

               (b) In case at any time the name of the Rights Agent shall be
changed and at such time any of the Rights Certificates shall have been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Rights Certificates so countersigned; and in
case at that time any of the Rights Certificates shall not have been
countersigned, the Rights Agent may countersign such Rights Certificates either
in its prior name or in its changed name; and in all such cases such Rights
Certificates shall have the full force provided in the Rights Certificates and
in this Agreement.

               Section 20. Duties of Rights Agent. The Rights Agent undertakes
the duties and obligations imposed by this Agreement upon the following terms
and conditions and no implied duties or obligations shall be read into this
Agreement against the Rights Agent, by all of which the Company and the holders
of Rights Certificates, by their acceptance thereof, shall be bound:

               (a) Before the Rights Agent acts or refrains from acting, it may
consult with legal counsel of its choice (who may be legal counsel for the
Company), and the advice or opin-


                                       28.


<PAGE>   32
ion of such counsel shall be full and complete authorization and protection to
the Rights Agent as to any action taken, suffered or omitted by it in good faith
and in accordance with such advice or opinion.

               (b) Whenever in the administration, exercise and performance of
its duties under this Agreement the Rights Agent shall deem it necessary or
desirable that any fact or matter be proved or established by the Company prior
to taking, suffering or omitting any action hereunder, such fact or matter
(unless other evidence in respect thereof be herein specifically prescribed) may
be deemed to be conclusively proved and established by a certificate signed by
any one of the Chairman of the Board, the Chief Executive Officer, the
President, any Vice President, the Treasurer or the Secretary of the Company and
delivered to the Rights Agent; and such certificate shall be full authorization
to the Rights Agent for any action taken, suffered or omitted in good faith by
it under the provisions of this Agreement in reliance upon such certificate.

               (c) The Rights Agent shall be liable hereunder to the Company and
any other Person only for its own gross negligence or willful misconduct.

               (d) The Rights Agent shall not be liable for or by reason of any
of the statements of fact or recitals contained in this Agreement or in the
Rights Certificates (except its countersignature thereof) or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Company only.

               (e) The Rights Agent shall not be under any liability or
responsibility in respect of the legality, validity or enforceability of this
Agreement or the execution and delivery hereof (except the due execution hereof
by the Rights Agent) or in respect of the legality, validity or enforceability
or the execution of any Rights Certificate (except its countersignature thereof
and has actual knowledge of such change or adjustment); nor shall it be liable
or responsible for any breach by the Company of any covenant or condition
contained in this Agreement or in any Rights Certificate; nor shall it be
responsible for any change in the exercisability of the Rights (including the
Rights becoming void pursuant to Section 11(a)(ii) hereof) or any adjustment in
the terms of the Rights (including the manner, method or amount thereof)
provided for in Section 3, 11, 13, 23 or 24, or the ascertaining of the
existence of facts that would require any such change or adjustment (except with
respect to the exercise of Rights evidenced by Rights Certificates after receipt
of the certificate described in Section 12 hereof or has actual knowledge of
such change or adjustment); nor shall it by any act hereunder be deemed to make
any representation or warranty as to the authorization or reservation of any
Units of Preferred Stock to be issued pursuant to this Agreement or any Rights
Certificate or as to whether any Preferred Stock will, when issued, be validly
authorized and issued, fully paid and nonassessable.

               (f) The Company agrees that it will perform, execute, acknowledge
and deliver or cause to be performed, executed, acknowledged and delivered all
such further and other acts, instruments and assurances as may reasonably be
required by the Rights Agent for the carrying out or performing by the Rights
Agent of the provisions of this Agreement.


                                       29.


<PAGE>   33
               (g) The Rights Agent is hereby authorized and directed to accept
instructions with respect to the administration, exercise and performance of its
duties hereunder from any one of the Chairman of the Board, the Chief Executive
Officer, the President, any Vice President, the Secretary or the Treasurer of
the Company, and to apply to such officers for advice or instructions in
connection with its duties, and it shall not be responsible or liable for any
action taken, suffered or omitted by it in good faith in accordance with
instructions of any such officer or for any delay in acting while waiting for
those instructions. Any application by the Rights Agent for written instructions
from the Company may, at the option of the Rights Agent, set forth in writing
any action proposed to be taken or omitted by the Rights Agent under this Rights
Agreement and the date on and/or after which such action shall be taken or such
omission shall be effective. The Rights Agent shall not be liable for any action
taken by, or omission of, the Rights Agent in accordance with a proposal
included in any such application on or after the date specified in such
application (which date shall not be less than five (5) Business Days after the
date any officer of the Company actually received such application, unless any
such officer shall have consented in writing to an earlier date) unless, prior
to taking any such action (or the effective date in the case of an omission),
the Rights Agent shall have received written instructions in response to such
application specifying the action to be taken or omitted.

               (h) The Rights Agent and any stockholder, director, officer or
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or become pecuniarily interested in any transaction in
which the Company may be interested, or contract with or lend money to the
Company or otherwise act as fully and freely as though it were not Rights Agent
under this Agreement. Nothing herein shall preclude the Rights Agent from acting
in any other capacity for the Company or for any other legal entity.

               (i) The Rights Agent may execute and exercise any of the rights
or powers hereby vested in it or perform any duty hereunder either itself or by
or through its attorneys or agents, and the Rights Agent shall not be answerable
or accountable for any act, default, neglect or misconduct of any such attorneys
or agents or for any loss to the Company resulting from any such act, default,
neglect or misconduct, provided reasonable care was exercised in the selection
and continued employment thereof.

               (j) No provision of this Agreement shall require the Rights Agent
to expend or risk its own funds or otherwise incur any financial liability in
the performance of any of its duties hereunder or in the exercise of its rights
if the Rights Agent in good faith believes that repayment of such funds or
adequate indemnification against such risk or liability is not reasonably
assured to it.

               (k) If, with respect to any Rights Certificate surrendered to the
Rights Agent for exercise, transfer, split up, combination or exchange, the
certification on the form of assignment or form of election to purchase, as the
case may be, that the Rights evidenced by the Rights Certificate are not owned
by an Acquiring Person, or an Affiliate or Associate thereof, has either not
been completed or in any manner indicates any other response thereto, the Rights
Agent


                                       30.


<PAGE>   34
shall not take any further action with respect to such requested exercise,
transfer, split up, combination or exchange, without first consulting with the
Company.

               Section 21. Change of Rights Agent. The Rights Agent or any
successor Rights Agent may resign and be discharged from its duties under this
Agreement upon thirty (30) days' notice in writing mailed to the Company and to
each transfer agent of the Common Stock or Preferred Stock (as to which the
Rights Agent has received prior written notice) by registered or certified mail,
and the Company shall mail notice thereof to the holders of the Rights
Certificates by first-class mail. The Company may remove the Rights Agent or any
successor Rights Agent upon thirty (30) days' notice in writing, mailed to the
Rights Agent or successor Rights Agent, as the case may be, and to each transfer
agent of the Common Stock or Preferred Stock (as to which the Rights Agent has
received prior written notice) by registered or certified mail, and to the
holders of the Rights Certificates by first-class mail. If the Rights Agent
shall resign or be removed or shall otherwise become incapable of acting, the
Company shall appoint a successor to the Rights Agent. If the Company shall fail
to make such appointment within a period of thirty (30) days after giving notice
of such removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the holder of a
Rights Certificate (who shall, with such notice, submit such holder's Rights
Certificate for inspection by the Company), then the registered holder of any
Rights Certificate may apply to any court of competent jurisdiction for the
appointment of a new Rights Agent. Any successor Rights Agent, whether appointed
by the Company or by such a court, shall be a corporation organized and doing
business under the laws of the United States or of any state of the United
States, in good standing, authorized under such laws to exercise corporate trust
or stock transfer powers, and subject to supervision or examination by federal
or state authority and which has at the time of its appointment as Rights Agent
a combined capital and surplus of at least $50 million. After appointment, the
successor Rights Agent shall be vested with the same powers, rights, duties and
responsibilities as if it had been originally named as Rights Agent without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose. Not later than the effective date of any such appointment the
Company shall file notice thereof in writing with the predecessor Rights Agent
and each transfer agent of the Common Stock or Preferred Stock, and mail a
notice thereof in writing to the registered holders of the Rights Certificates.
Failure to give any notice provided for in this Section 21, however, or any
defect therein, shall not affect the legality or validity of the resignation or
removal of the Rights Agent or the appointment of the successor Rights Agent, as
the case may be.

               Section 22. Issuance of New Rights Certificates. Notwithstanding
any of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Rights Certificates evidencing Rights in
such form as may be approved by its Board of Directors, upon approval by a
majority of the Continuing Directors, to reflect any adjustment or change in the
Purchase Price and the number or kind or class of shares or other securities or
property purchasable under the Rights Certificates made in accordance with the
provisions of this Agreement. In addition, in connection with the issuance or
sale of shares of Common Stock


                                       31.


<PAGE>   35
following the Distribution Date and prior to the Expiration Date, the Company
(a) shall, with respect to shares of Common Stock so issued or sold pursuant to
the exercise of stock options or under any employee benefit plan or arrangement
or upon the exercise, conversion or exchange of securities of the Company
currently outstanding or issued at any time in the future by the Company and (b)
may, in any other case, if deemed necessary or appropriate by the Board of
Directors of the Company, upon approval by a majority of the Continuing
Directors, issue Rights Certificates representing the appropriate number of
Rights in connection with such issuance or sale; provided, however, that (i) no
such Rights Certificate shall be issued and this sentence shall be null and void
ab initio if, and to the extent that, such issuance or this sentence would
create a significant risk of or result in material adverse tax consequences to
the Company or the Person to whom such Rights Certificate would be issued or
would create a significant risk of or result in such options' or employee plans'
or arrangements' failing to qualify for otherwise available special tax
treatment and (ii) no such Rights Certificate shall be issued if, and to the
extent that, appropriate adjustment shall otherwise have been made in lieu of
the issuance thereof.

               Section 23. Redemption and Termination.

               (a) The Company may, at its option, upon approval by a majority
of the Continuing Directors, at any time prior to the earlier of (i) the
Distribution Date, or (ii) the Final Expiration Date redeem all but not less
than all the then outstanding Rights at a redemption price of $0.001 per Right,
appropriately adjusted to reflect any stock split, stock dividend or similar
transaction occurring after the date hereof (such redemption price being
hereinafter referred to as the "Redemption Price"), and the Company may, at its
option, pay the Redemption Price either in cash, shares of Common Stock (based
on the current per share market price thereof (as determined pursuant to Section
11(d) hereof) at the time of redemption), or any other form of consideration
deemed appropriate by the Board of Directors. The redemption of the Rights by
the Board of Directors may be made effective at such time on such basis and with
such conditions as a majority of the Continuing Directors in its sole discretion
may establish.

               (b) Immediately upon the action of a majority of the Continuing
Directors of the Company ordering the redemption of the Rights pursuant to
paragraph (a) of this Section 23, and without any further action and without any
notice, the right to exercise the Rights will terminate and the only right
thereafter of the holders of Rights shall be to receive the Redemption Price.
The Company shall promptly give public notice of any such redemption; provided,
however, that the failure to give, or any defect in, any such notice shall not
affect the validity of such redemption. Within 10 days after such action of a
majority of the Continuing Directors ordering the redemption of the Rights, the
Company shall give notice of such redemption to the Rights Agent and shall mail
a notice of redemption to all the holders of the then outstanding Rights at
their last addresses as they appear upon the registry books of the Rights Agent
or, prior to the Distribution Date, on the registry books of the transfer agent
for the Common Stock. Any notice which is mailed in the manner herein provided
shall be deemed given, whether or not the holder receives the notice. Each such
notice of redemption will state the method by which the payment of the
Redemption Price will be made. Neither the Company nor any of its Affiliates or
Associates may redeem, acquire or purchase for value any Rights at any time in
any manner


                                       32.


<PAGE>   36
other than that specifically set forth in this Section 23 or in Section 24
hereof, and other than in connection with the purchase of shares of Common Stock
prior to the Distribution Date.

               (c) Notwithstanding anything contained in this Agreement to the
contrary, the Rights shall not be exercisable pursuant to Section 7(a) at any
time when the Rights are redeemable hereunder.

               Section 24. Exchange.

               (a) The Company, at its option, upon approval by a majority of
the Company's Continuing Directors, at any time after any Person becomes an
Acquiring Person, may exchange all or part of the then outstanding and
exercisable Rights (which shall not include Rights that have become void
pursuant to the provisions of Section 7(e) hereof) for Units of Preferred Stock
at an exchange ratio equal to, subject to adjustment to reflect stock splits,
stock dividends and similar transactions occurring after the date hereof, that
number obtained by dividing the Purchase Price by the then current per share
market price per Unit of Preferred Stock on the earlier of (i) the date on which
any Person becomes an Acquiring Person and (ii) the date on which a tender or
exchange offer by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan maintained by the Company or any of its
Subsidiaries or any trustee or fiduciary with respect to such plan acting in
such capacity) is first published or sent or given within the meaning of Rule
14d-4(a) of the Exchange Act Regulations or any successor rule, if upon
consummation thereof such Person would be the Beneficial Owner of 15% or more of
the shares of Common Stock then outstanding (such exchange ratio being
hereinafter referred to as the "Section 24(a) Exchange Ratio"). Notwithstanding
the foregoing, the Company may not effect such exchange at any time after any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan maintained by the Company or any of its Subsidiaries, or any
trustee or fiduciary with respect to such plan acting in such capacity),
together with all Affiliates and Associates of such Person, becomes the
Beneficial Owner of 50% or more of the shares of Common Stock then outstanding.

               (b) Immediately upon the action of the Board of Directors of the
Company ordering the exchange of any Rights pursuant to subsection (a) of this
Section 24 and without any further action and without any notice, the right to
exercise such Rights shall terminate and the only right thereafter of a holder
of such Rights shall be to receive that number of Units of Preferred Stock equal
to the number of such Rights held by such holder multiplied by the Section 24(a)
Exchange Ratio. The Company shall promptly give public notice of any such
exchange; provided, however, that the failure to give, or any defect in, such
notice shall not affect the validity of such exchange. The Company promptly
shall mail a notice of any such exchange to all of the holders of such Rights at
their last addresses as they appear upon the registry books of the Rights Agent.
Any notice which is mailed in the manner herein provided shall be deemed given,
whether or not the holder receives the notice. Each such notice of exchange will
state the method by which the exchange of Units of Preferred Stock for Rights
will be effected and, in the event of any partial exchange, the number of Rights
which will be exchanged. Any partial


                                       33.


<PAGE>   37
exchange shall be effected pro rata based on the number of Rights (other than
Rights which have become void pursuant to the provisions of Section 7(e) hereof)
held by each holder of Rights.

               (c) In the event that the number of shares of Preferred Stock
which are authorized by the Company's Fifth Amended and Restated Certificate of
Incorporation but not outstanding or reserved for issuance for purposes other
than upon exercise of the Rights are not sufficient to permit any exchange of
Rights as contemplated in accordance with this Section 24, the Company shall
take all such action as may be necessary to authorize additional shares of
Preferred Stock for issuance upon exchange of the Rights or make adequate
provision to substitute (1) cash, (2) Company Common Stock or other equity
securities of the Company, (3) debt securities of the Company, (4) other assets,
or (5) any combination of the foregoing, having an aggregate value equal to the
Adjustment Spread, where such aggregate value has been determined by a majority
of the Continuing Directors. To the extent that the Company determines that some
action need be take pursuant to subsection (a) of this Section 24, the Board of
Directors, upon approval by a majority of the Continuing Directors, may
temporarily suspend the exercisability of the Rights for a period of up to sixty
(60) days following the date on which the event described in Section 24(a) shall
have occurred, in order to seek any authorization of additional shares of
Preferred Stock and/or to decide the appropriate form of distribution to be made
pursuant to the above provision and to determine the value thereof. In the event
of any such suspension, the Company shall issue a public announcement stating
that the exercisability of the Rights has been temporarily suspended.

               (d) The Company shall not be required to issue fractions smaller
than or to distribute certificates which evidence fractions smaller than one
one-thousandth of a share of Preferred Stock. In lieu thereof, the Company shall
pay to the registered holders of the Rights Certificates with regard to which
such fractional Units would otherwise be issuable an amount in cash equal to the
same fraction of the current market value (as determined pursuant to Section
11(d)(i) hereof) of one Unit of Preferred Stock.

               Section 25. Notice of Certain Events.

               (a) In case the Company shall propose (i) to pay any dividend
payable in stock of any class to the holders of its Preferred Stock or to make
any other distribution to the holders of its Preferred Stock (other than a
regular quarterly cash dividend), (ii) to offer to the holders of its Preferred
Stock rights or warrants to subscribe for or to purchase any additional Units of
Preferred Stock or shares of stock of any class or any other securities, rights
or options, (iii) to effect any reclassification of its Preferred Stock (other
than a reclassification involving only the subdivision of outstanding Preferred
Stock), (iv) to effect any consolidation or merger into or with any other Person
(other than a Subsidiary of the Company in a transaction which complies with
Section 11(o)), or to effect any sale or other transfer (or to permit one or
more of its Subsidiaries to effect any sale or other transfer), in one or more
transactions, of 50% or more of the assets or earning power of the Company and
its Subsidiaries (taken as a whole) to, any other Person, (v) to effect the
liquidation, dissolution or winding up of the Company, or (vi) to declare or pay
any dividend on the Common Stock payable in shares of Common Stock or to effect
a


                                       34.


<PAGE>   38
subdivision, combination or consolidation of the shares of Common Stock (by
reclassification or otherwise than by payment of dividends in shares of Common
Stock), then, in each such case, the Company shall give to each holder of a
Rights Certificate, in accordance with Section 26 hereof, a notice of such
proposed action, which shall specify the record date for the purposes of such
stock dividend, or distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the shares of Common Stock and/or shares of Preferred
Stock, if any such date is to be fixed, and such notice shall be so given in the
case of any action covered by clause (i) or (ii) above at least ten (10) days
prior to the record date for determining holders of the shares of Preferred
Stock for purposes of such action, and in the case of any such other action, at
least ten (10) days prior to the date of the taking of such proposed action or
the date of participation therein by the holders of the shares of Common Stock
and/or shares of Preferred Stock, whichever shall be the earlier.

               (b) In case any of the events set forth in Section 11(a)(ii)
hereof shall occur, then the Company shall as soon as practicable thereafter
give to each holder of a Rights Certificate, in accordance with Section 26
hereof, a notice of the occurrence of such event, which notice shall describe
such event and the consequences of such event to holders of Rights under Section
11(a)(ii) hereof. In the event any Person becomes an Acquiring Person, the
Company will promptly notify the Rights Agent thereof.

               Section 26. Notices. Notices or demands authorized by this
Agreement to be given or made by the Rights Agent or by the holder of any Rights
Certificate to or on behalf of the Company shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Rights Agent) as follows:

               Advanced Fibre Communications, Inc.
               One Willow Brook Court
               Petaluma, California 94954

               Attention: Chief Financial Officer


Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Rights Certificate to or on behalf of the Rights Agent shall be sent by
registered or certified mail and shall be deemed given upon receipt and
addressed (until another address is filed in writing with the Company) as
follows:
               BankBoston, N.A.
               c/o Boston EquiServe Limited Partnership
               150 Royall Street
               Canton, MA  02021

               Attention: Client Administration


                                       35.


<PAGE>   39
Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company.

               Section 27. Supplements and Amendments. Prior to the Distribution
Date, the Company may supplement or amend this Agreement in any respect, without
the approval of any holders of Rights, by action of its Board of Directors, upon
approval by a majority of the Continuing Directors, and the Rights Agent shall,
if the Company so directs, execute such supplement or amendment. From and after
the Distribution Date, the Company may from time to time supplement or amend
this Agreement without the approval of any holders of Rights, by action of its
Board of Directors, upon approval by a majority of the Continuing Directors, in
order (i) to cure any ambiguity, (ii) to correct or supplement any provision
contained herein which may be defective or inconsistent with any other
provisions herein, (iii) to shorten or lengthen any time period hereunder or
(iv) to change or supplement the provisions hereunder in any manner which the
Company may deem necessary or desirable and which shall not adversely affect the
interests of the holders of Rights Certificates (other than an Acquiring Person
or an Affiliate or Associate of an Acquiring Person); provided, however, that
this Agreement may not be supplemented or amended to lengthen, pursuant to
clause (iii) of this sentence, (A) a time period relating to when the Rights may
be redeemed at such time as the Rights are not then redeemable or (B) any other
time period unless such lengthening is for the purpose of protecting, enhancing
or clarifying the rights of, and/or the benefits to, the holders of Rights
Certificates (other than an Acquiring Person or an Affiliate or Associate of an
Acquiring Person). Upon receipt of a certificate from an appropriate officer of
the Company that the proposed supplement or amendment is consistent with this
Section 27 and, after such time as any Person has become an Acquiring Person,
that the proposed supplement or amendment does not adversely affect the
interests of the holders of Rights, the Rights Agent shall execute such
supplement or amendment. Prior to the Distribution Date, the interests of the
holders of Rights shall be deemed coincident with the interests of the holders
of shares of Common Stock.

               Section 28. Successors. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Rights Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

               Section 29. Determinations and Actions by the Board of Directors.

               (a) For all purposes of this Agreement, any calculation of the
number of shares of Common Stock outstanding at any particular time, including
for purposes of determining the particular percentage of such outstanding shares
of Common Stock of which any Person is the Beneficial Owner, shall be made in
accordance with the last sentence of Rule 13d-3(d)(1)(i) of the Exchange Act.
The Board of Directors of the Company shall have the exclusive power and
authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board of Directors, or the Company, or as may be
necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to


                                       36.


<PAGE>   40
(i) interpret the provisions of this Agreement and (ii) make all determinations
deemed necessary or advisable for the administration of this Agreement
(including a determination to redeem or not redeem the Rights or to amend the
Agreement). All such actions, calculations, interpretations and determinations
(including, for purposes of clause (y) below, all omissions with respect to the
foregoing), which are done or made by the Board of Directors in good faith,
shall (x) be final, conclusive and binding on the Company, the Rights Agent, the
holders of the Rights Certificates and all other parties and (y) not subject the
Board of Directors or the Continuing Directors to any liability to the holders
of the Rights.

               Section 30. Benefits of This Agreement. Nothing in this Agreement
shall be construed to give to any person or corporation other than the Company,
the Rights Agent and the registered holders of the Rights Certificates (and,
prior to the Distribution Date, shares of Common Stock) any legal or equitable
right, remedy or claim under this Agreement; but this Agreement shall be for the
sole and exclusive benefit of the Company, the Rights Agent and the registered
holders of the Rights Certificates (and, prior to the Distribution Date, shares
of Common Stock).

               Section 31. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant or restriction is held by such
court or authority to be invalid, void or unenforceable and the Board of
Directors of the Company, upon approval by a majority of the Continuing
Directors, determines in its good faith judgment that severing the invalid
language from this Agreement would adversely affect the purpose or effect of
this Agreement, the right of redemption set forth in Section 23 hereof shall be
reinstated and shall not expire until the tenth Business Day following the date
of such determination by the Board of Directors of the Company.

               Section 32. Governing Law. This Agreement and each Rights
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts to
be made and performed entirely within such State.

               Section 33. Counterparts. This Agreement may be executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

               Section 34. Descriptive Headings. Descriptive headings of the
several sections of this Agreement are inserted for convenience only and shall
not control or affect the meaning or construction of any of the provisions
hereof.


                                       37.


<PAGE>   41
               IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be duly executed and attested, all as of the day and year first above
written.

                                        ADVANCED FIBRE COMMUNICATIONS,
                                        INC.
ATTEST:


By   /s/ PETER A. DARBEE                 By  /s/ CARL J. GRIVNER
   -------------------------------           -------------------------------
Name: Peter A. Darbee                    Name: Carl J. Grivner
Title: Vice President, Chief Financial   Title: President, Chief Executive 
 Officer, Treasurer and Secretary          Officer and Director



ATTEST:                                  BANKBOSTON, N.A.
                                         as Rights Agent


By /s/ GREGORY BARTEK                    By  /s/ KATHERINE ANDERSON
  -------------------------------            -------------------------------
        Name: Gregory Bartek                    Name: Katherine Anderson
        Title: Account Manager                  Title: Director,
                                                  Client Services


                                       38.


<PAGE>   42
                                                                       Exhibit A


                                      FORM

                                       of

                           CERTIFICATE OF DESIGNATION

                                       of

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       of

                       ADVANCED FIBRE COMMUNICATIONS, INC.

                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)

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


               Advanced Fibre Communications, Inc., a corporation organized and
existing under the General Corporation Law of the State of Delaware (hereinafter
called the "Corporation"), hereby certifies that the following resolution was
adopted by the Board of Directors of the Corporation as required by Section 151
of the General Corporation Law at a meeting duly called and held on May 13,
1998;

               RESOLVED, that pursuant to the authority granted to and vested in
the Board of Directors of the Corporation (hereinafter called the "Board of
Directors" or the "Board") in accordance with the provisions of the Fifth
Amended and Restated Certificate of Incorporation (the "Certificate of
Incorporation"), the Board of Directors hereby creates a series of Preferred
Stock, par value $0.01 per share (the "Preferred Stock"), of the Corporation and
hereby states the designation and number of shares, and fixes the relative
rights, preferences, and limitations thereof as follows:

               Series A Junior Participating Preferred Stock:

               Section 1. Designation and Amount. The shares of such series
shall be designated as "Series A Junior Participating Preferred Stock" (the
"Series A Preferred Stock") and the number of shares constituting the Series A
Preferred Stock shall be Two Hundred Thousand (200,000). Such number of shares
may be increased or decreased by resolution of the Board of

                                       A-1

<PAGE>   43
Directors; provided, that no decrease shall reduce the number of shares of
Series A Preferred Stock to a number less than the number of shares then
outstanding plus the number of shares reserved for issuance upon the exercise of
outstanding options, rights or warrants or upon the conversion of any
outstanding securities issued by the Corporation convertible into Series A
Preferred Stock.

               Section 2.  Dividends and Distributions.

               (A) Subject to the rights of the holders of any shares of any
        series of Preferred Stock (or any similar stock) ranking prior and
        superior to the Series A Preferred Stock with respect to dividends, each
        holder of a share of Series A Preferred Stock, in preference to the
        holders of shares of Common Stock, par value $0.01 per share (the
        "Common Stock"), of the Corporation, and of any other junior stock,
        shall be entitled to receive, when declared by the Board of Directors
        out of funds legally available for the purpose, quarterly dividends
        payable in cash on the last day of March, June, September and December
        in each year (each such date being referred to herein as a "Quarterly
        Dividend Payment Date"), commencing on the first Quarterly Dividend
        Payment Date after the first issuance of a share or fraction of a share
        Series A Preferred Stock, in an amount per share (rounded to the nearest
        cent) equal to, subject to the provision for adjustment hereinafter set
        forth, One Thousand (1,000) times the aggregate per share amount of all
        cash dividends, and One Thousand (1,000) times the aggregate per share
        amount (payable in kind) of all non-cash dividends or other
        distributions, other than a dividend payable in shares of Common Stock
        or a subdivision of the outstanding shares of Common Stock (by
        reclassification or otherwise), declared on the Common Stock since the
        immediately preceding Quarterly Dividend Payment Date or, with respect
        to the first Quarterly Dividend Payment Date, since the first issuance
        of a share or fraction of Series A Preferred Stock. In the event the
        Corporation shall at any time declare or pay any dividend on the Common
        Stock payable in shares of Common Stock, or effect a subdivision or
        combination or consolidation of the outstanding shares of Common Stock
        (by reclassification or otherwise than by payment of a dividend in
        shares of Common Stock) into a greater or lesser number of shares of
        Common Stock, then in each such case the amount to which holders of
        shares of Series A Preferred Stock were entitled immediately prior to
        such event under clause (b) of the preceding sentence shall be adjusted
        by multiplying such amount by a fraction, the numerator of which is the
        number of shares of Common Stock outstanding immediately after such
        event and the denominator of which is the number of shares of Common
        Stock that were outstanding immediately prior to such event.

               (B) The Corporation shall declare a dividend or distribution on
        the shares of Series A Preferred Stock as provided in paragraph (A) of
        this Section immediately after it declares a dividend or distribution on
        the Common Stock (other than a dividend payable in shares of Common
        Stock); provided, however, that, in the event no dividend or
        distribution shall have been declared on the Common Stock during the
        period between any Quarterly Distribution Date and the next subsequent
        Quarterly Dividend Payment Date,

                                       A-2

<PAGE>   44
        a dividend of $1 per share of Series A Preferred Stock shall
        nevertheless be payable on such subsequent Quarterly Dividend Payment
        Date.

               (C) Dividends shall begin to accrue and be cumulative on each
        outstanding share of Series A Participating Preferred Stock from the
        Quarterly Dividend Payment Date next preceding the date of issue of such
        share of Series A Participating Preferred Stock, unless the date of
        issue of such share is prior to the record date for the first Quarterly
        Dividend Payment Date, in which case dividends on such share shall begin
        to accrue from the date of issue of such share, or unless the date of
        issue is a Quarterly Dividend Payment Date or is a date after the record
        date for the determination of holders of shares of Series A Preferred
        Stock entitled to receive a quarterly dividend and before such Quarterly
        Dividend Payment Date, in either of which events such dividends shall
        begin to accrue and be cumulative from such Quarterly Dividend Payment
        Date. Accrued but unpaid dividends shall not bear interest. Dividends
        paid on the shares of Series A Preferred Stock in an amount less than
        the total amount of such dividends at the time accrued and payable on
        such shares shall be allocated pro rata on a share-by-share basis among
        all such shares at the time outstanding. The Board of Directors may fix
        a record date for the determination of holders of shares of Series A
        Preferred Stock entitled to receive payment of a dividend or
        distribution declared thereon, which record date shall be not more than
        60 days prior to the date fixed for the payment thereof.

               Section 3. Voting Rights. The holders of shares of Series A
Preferred Stock shall have the following voting rights:

               (A) Subject to the provision for adjustment hereinafter set
        forth, each share of Series A Preferred Stock shall entitle the holder
        thereof to One Thousand (1,000) votes on all matters submitted to a vote
        of the stockholders of the Corporation. In the event the Corporation
        shall at any time declare or pay any dividend on the Common Stock
        payable in shares of Common Stock, or effect a subdivision or
        combination or consolidation of the outstanding shares of Common Stock
        (by reclassification or otherwise than by payment of a dividend in
        shares of Common Stock) into a greater or lesser number of shares of
        Common Stock, then in each such case the number of votes per share to
        which holders of shares of Series A Preferred Stock were entitled
        immediately prior to such event shall be adjusted by multiplying such
        number by a fraction, the numerator of which is the number of shares of
        Common Stock outstanding immediately after such event and the
        denominator of which is the number of shares of Common Stock that were
        outstanding immediately prior to such event.

               (B) Except as otherwise provided herein, in any other Certificate
        of Designations creating a series of Preferred Stock or any similar
        stock, or by law, the holders of shares of Series A Preferred Stock and
        the holders of shares of Common Stock and any other capital stock of the
        Corporation having general voting rights shall vote together as one
        class on all matters submitted to a vote of stockholders of the
        Corporation.

                                       A-3

<PAGE>   45
               (C) Except as set forth herein, or as otherwise provided by law,
        holders of Series A Preferred Stock shall have no special voting rights
        and their consent shall not be required (except to the extent they are
        entitled to vote with holders of Common Stock as set forth herein) for
        taking any corporate action.

               Section 4.  Certain Restrictions.

               (A) Whenever quarterly dividends or other dividends or
        distributions payable on the Series A Preferred Stock as provided in
        Section 2 are in arrears, thereafter and until all accrued and unpaid
        dividends and distributions, whether or not declared, on shares of
        Series A Preferred Stock outstanding shall have been paid in full, the
        Corporation shall not:

                    (i) declare or pay dividends, or make any other
               distributions, on any shares of stock ranking junior (either as
               to dividends or upon liquidation, dissolution or winding up) to
               the Series A Preferred Stock;

                   (ii) declare or pay dividends, or make any other
               distributions, on any shares of stock ranking on a parity (either
               as to dividends or upon liquidation, dissolution or winding up)
               with the Series A Preferred Stock, except dividends paid ratably
               on the shares of Series A Preferred Stock and all such parity
               stock on which dividends are payable or in arrears in proportion
               to the total amounts to which the holders of all such shares are
               then entitled;

                  (iii) redeem or purchase or otherwise acquire for
               consideration shares of any stock ranking junior (either as to
               dividends or upon liquidation, dissolution or winding up) to the
               Series A Preferred Stock, provided that the Corporation may at
               any time redeem, purchase or otherwise acquire shares of any such
               junior stock in exchange for shares of any stock of the
               Corporation ranking junior (either as to dividends or upon
               dissolution, liquidation or winding up) to the Series A Preferred
               Stock; or

                   (iv) redeem or purchase or otherwise acquire for
               consideration any shares of Series A Preferred Stock, or any
               shares of stock ranking on a parity with the Series A Preferred
               Stock, except in accordance with a purchase offer made in writing
               or by publication (as determined by the Board of Directors) to
               all holders of such shares upon such terms as the Board of
               Directors, after consideration of the respective annual dividend
               rates and other relative rights and preferences of the respective
               series and classes, shall determine in good faith will result in
               fair and equitable treatment among the respective series or
               classes.

                                       A-4

<PAGE>   46
               (B) The Corporation shall not permit any subsidiary of the
        Corporation to purchase or otherwise acquire for consideration any
        shares of stock of the Corporation unless the Corporation could, under
        paragraph (A) of this Section 4, purchase or otherwise acquire such
        shares at such time and in such manner.

               Section 5. Reacquired Shares. Any shares of Series A Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and cancelled promptly after the acquisition
thereof. All such shares shall upon their cancellation become authorized but
unissued shares of Preferred Stock and may be reissued as part of a new series
of Preferred Stock subject to the conditions and restrictions on issuance set
forth herein, in the Certificate of Incorporation, or in any other Certificate
of Designations creating a series of Preferred Stock or any similar stock or as
otherwise required by law.

               Section 6.  Liquidation, Dissolution or Winding Up.

               (A) Upon any liquidation, dissolution or winding up of the
Corporation, no distribution shall be made (1) to the holders of shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Preferred Stock unless, prior thereto, the holders
of shares of Series A Preferred Stock shall have received One Thousand Dollars
($1,000) per share, plus an amount equal to accrued and unpaid dividends and
distributions thereon, whether or not declared, to the date of such payment,
provided that the holders of shares of Series A Preferred Stock shall be
entitled to receive an aggregate amount per share, subject to the provision for
adjustment hereinafter set forth, equal to 1,000 times the aggregate amount to
be distributed per share to holders of shares of Common Stock, or (2) to the
holders of shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Preferred Stock,
except distributions made ratably on the Series A Preferred Stock and all such
parity stock in proportion to the total amounts to which the holders of all such
shares are entitled upon such liquidation, dissolution or winding up. In the
event the Corporation shall at any time declare or pay any dividend on the
Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the aggregate amount to which holders of shares of Series A Preferred
Stock were entitled immediately prior to such event under the proviso in clause
(1) of the preceding sentence shall be adjusted by multiplying such amount by a
fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

               (B) In the event, however, that there are not sufficient assets
available to permit payment in full to the Series A Liquidation Preference and
the liquidation preferences of all other series of Preferred Stock, if any,
which rank on a parity with the Series A Participating Preferred Stock, then
such remaining assets shall be distributed ratably to the holders of such parity
shares in proportion to their respective liquidation preferences. In the event,
however, that there are not

                                       A-5

<PAGE>   47
sufficient assets available to permit payment in full of the Common Adjustment,
then such remaining assets shall be distributed ratably to the holders of Common
Stock.

               (C) In the event the Corporation shall at any time after the
Rights Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the Adjustment Number in effect immediately prior to such event
shall be adjusted by multiplying such Adjustment Number by a fraction the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

               Section 7. Consolidation, Merger, etc. In case the Corporation
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case each share
of Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to One Thousand (1,000) times the aggregate amount
of stock, securities, cash and/or any other property (payable in kind), as the
case may be, into which or for which each share of Common Stock is changed or
exchanged. In the event the Corporation shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect a
subdivision or combination or consolidation of the outstanding shares of Common
Stock (by reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the amount set forth in the preceding sentence with respect to
the exchange or change of shares of Series A Preferred Stock shall be adjusted
by multiplying such amount by a fraction, the numerator of which is the number
of shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

               Section 8. No Redemption. The shares of Series A Preferred Stock
shall not be redeemable.

               Section 9. Rank. The Series A Preferred Stock shall rank, with
respect to the payment of dividends and the distribution of assets, junior to
all series of any other class of the Corporation's Preferred Stock.

               Section 10. Amendment. The Certificate of Incorporation of the
Corporation shall not be amended in any manner which would materially alter or
change the powers, preferences or special rights of the Series A Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of at
least a majority of the outstanding shares of Series A Preferred Stock, voting
together as a single class.

                                       A-6

<PAGE>   48
               IN WITNESS WHEREOF, this Certificate of Designation is executed
on behalf of the Corporation by its President and its corporate seal attested by
its Secretary this __th day of May, 1998.



                                   -----------------------------------------
                                   Name: Carl J. Grivner
                                   Title: President, Chief Executive Officer
                                      and Director



Attest:


- -------------------------------
Name: Peter A. Darbee
Title: Vice President, Chief
  Financial Officer, Treasurer
  and Secretary

                                       A-7

<PAGE>   49
                                                                       Exhibit B

                           Form of Rights Certificate

Certificate No. R-                                               ________ Rights


               NOT EXERCISABLE AFTER MAY 25, 2008 OR EARLIER IF REDEMPTION OR
               EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT THE
               OPTION OF THE COMPANY AT $0.01 PER RIGHT AND TO EXCHANGE ON THE
               TERMS SET FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN
               CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON
               OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH
               TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT
               HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. [THE RIGHTS
               REPRESENTED BY THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY
               OWNED BY A PERSON WHO WAS OR BECAME AN ACQUIRING PERSON OR AN
               AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE
               DEFINED IN THE RIGHTS AGREEMENT). ACCORDINGLY, THIS RIGHTS
               CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME NULL AND
               VOID IN THE CIRCUMSTANCES SPECIFIED IN SUCH AGREEMENT.]


                               Rights Certificate

                       ADVANCED FIBRE COMMUNICATIONS, INC.


               This certifies that       , or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of May 13, 1998 (the "Rights Agreement"), between Advanced
Fibre Communications, Inc., a Delaware corporation (the "Company"), and
BankBoston, N.A. (the "Rights Agent"), to purchase from the Company at any time
after the Distribution Date (as such term is defined in the Rights Agreement)
and prior to 5:00 P.M., Massachusetts time, on May 25, 2008 at the office of the
Rights Agent designated for such purpose, or at the office of its successor as
Rights Agent, one one-thousandth (a "Unit") of a fully paid non-assessable share
of Series A Junior Participating Preferred Stock, par value $0.01 per share (the
"Series A Preferred Stock") of the Company, at a purchase price of $225.00 per
Unit of Series A Preferred Stock (the "Purchase Price"), upon presentation and
surrender of this Rights

                                       B-1

<PAGE>   50
Certificate with the Form of Election to Purchase duly executed. The number of
Rights evidenced by this Rights Certificate (and the number of Units of Series A
Preferred Stock which may be purchased upon exercise hereof) set forth above,
and the Purchase Price set forth above, are the number and Purchase Price as of
May 25, 1998 based on the Series A Preferred Stock as constituted at such date.
As provided in the Rights Agreement, the Purchase Price and the number of Units
of Series A Preferred Stock which may be purchased upon the exercise of the
Rights evidenced by this Rights Certificate are subject to modification and
adjustment upon the happening of certain events.

               This Rights Certificate is subject to all of the terms,
provisions and conditions of the Rights Agreement, which terms, provisions and
conditions are hereby incorporated herein by reference and made a part hereof
and to which Rights Agreement reference is hereby made for a full description of
the rights, limitations of rights, obligations, duties and immunities hereunder
of the Rights Agent, the Company and the holders of the Rights Certificates.
Copies of the Rights Agreement are on file at the principal executive offices of
the Company.

               This Rights Certificate, with or without other Rights
Certificates, upon surrender at the office of the Rights Agent designated for
such purpose, may be exchanged for another Rights Certificate or Rights
Certificates of like tenor and date evidencing Rights entitling the holder to
purchase a like aggregate number of Series A Preferred Stock as the Rights
evidenced by the Rights Certificate or Rights Certificates surrendered shall
have entitled such holder to purchase. If this Rights Certificate shall be
exercised in part, the holder shall be entitled to receive upon surrender hereof
another Rights Certificate or Rights Certificates for the number of whole Rights
not exercised.

               Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Certificate may be redeemed by the Company at a redemption
price of $0.01 per Right.

               No fractional shares of Series A Preferred Stock will be issued
upon the exercise of any Rights or Rights evidenced hereby (other than fractions
which are integral multiples of one one-thousandth of a share of Series A
Preferred Stock, which may, at the election of the Company, be evidenced by
depositary receipts), but in lieu thereof a cash payment will be made, as
provided in the Rights Agreement.

               No holder of this Rights Certificate, as such, shall be entitled
to vote or receive dividends or be deemed for any purpose the holder of Units of
Series A Preferred Stock or of any other securities of the Company which may at
any time be issuable on the exercise hereof, nor shall anything contained in the
Rights Agreement or herein be construed to confer upon the holder hereof, as
such, any of the rights of a stockholder of the Company or any right to vote for
the election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Rights or Rights evidenced by this Rights
Certificate shall have been exercised as provided in the Rights Agreement.

                                       B-2

<PAGE>   51
               This Rights Certificate shall not be valid or obligatory for any
purpose until it shall have been countersigned by the Rights Agent.

               WITNESS the signature of the proper officers of the Company and
its corporate seal. Dated as of May __, 1998.




                                          ADVANCED FIBRE COMMUNICATIONS,
                                          INC.

ATTEST:


By                                        By
  -------------------------------            -------------------------------
Name: Peter A. Darbee                     Name: Carl J. Grivner
Title: Vice President, Chief Financial    Title: President, Chief 
 Officer, Treasurer and Secretary         Executive Officer and Director




Countersigned:

BANKBOSTON, N.A.
as Rights Agent


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

                                       B-3

<PAGE>   52
                   Form of Reverse Side of Rights Certificate

                               FORM OF ASSIGNMENT


      (To be executed by the registered holder if such holder desires to
      transfer the Rights Certificate.)

               FOR VALUE RECEIVED ____________________________ hereby sells,
assigns and transfers unto


- --------------------------------------------------------------------------------
                  (Please print name and address of transferee)

this Rights Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint ________ Attorney, to 
transfer the within Rights Certificate on the books of the within-named Company,
with full power of substitution.


Dated:________________________, __



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

Signature Guaranteed:

               Signatures must be guaranteed by a participant in a Securities
Transfer Association Inc. recognized signature guarantee medallion program.

                                       B-4

<PAGE>   53
                                   CERTIFICATE


               The undersigned hereby certifies that the Rights evidenced by
this Rights Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).


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



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


                                     NOTICE

               The signature in the foregoing Form of Assignment must conform to
the name as written upon the face of this Rights Certificate in every
particular, without alteration or enlargement or any change whatsoever.

               In the event the certification set forth above in the Form of
Assignment is not completed, the Company and the Rights Agent will deem the
beneficial owner of the Rights evidenced by this Rights Certificate to be an
Acquiring Person or an Affiliate or Associate thereof (as defined in the Rights
Agreement) and such Assignment will not be honored.

                                       B-5

<PAGE>   54
                          FORM OF ELECTION TO PURCHASE


(To be executed if holder desires to exercise the Rights Certificate.)


To ADVANCED FIBRE COMMUNICATIONS, INC.

               The undersigned hereby irrevocably elects to exercise Rights
represented by this Rights Certificate to purchase the units of Series A
Preferred Stock issuable upon the exercise of such Rights and requests that
certificates for such Series A Preferred Stock be issued in the name of:

Please insert social security
or other identifying number ___________________________________________________
                                       (Please print name and address)

If such number of Rights shall not be all the Rights evidenced by this Rights
Certificate, a new Rights Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number ___________________________________________________
                                       (Please print name and address)



Dated:_______________________ , _____



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


Signature Guaranteed:

               Signatures must be guaranteed by a participant in a Securities
Transfer Association Inc. recognized signature guarantee medallion program.

                                       B-6
<PAGE>   55
                                   CERTIFICATE


               The undersigned hereby certifies that the Rights evidenced by
this Rights Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).



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



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


                                     NOTICE


               The signature in the foregoing Form of Election to Purchase must
conform to the name as written upon the face of this Rights Certificate in every
particular, without alteration or enlargement or any change whatsoever.

               In the event the certification set forth above in the Form of
Election to Purchase, as the case may be, is not completed, the Company and the
Rights Agent will deem the beneficial owner of the Rights evidenced by this
Rights Certificate to be an Acquiring Person or an Affiliate or Associate
thereof (as defined in the Rights Agreement) and such Election to Purchase will
not be honored.

                                       B-7

<PAGE>   56
                                                                       Exhibit C

                       ADVANCED FIBRE COMMUNICATIONS, INC.

                          SUMMARY OF RIGHTS TO PURCHASE
                       SHARES OF SERIES A PREFERRED STOCK


               On May 13, 1998, the Board of Directors of Advanced Fibre
Communications, Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of Common Stock (the
"Common Stock"), par value $0.01 per share, of the Company. The dividend is
payable on May 25, 1998 (the "Record Date") to the stockholders of record on
that date. Each Right entitles the registered holder to purchase from the
Company one one-thousandth of a share (a "Unit") of Series A Junior
Participating Preferred Stock, par value $0.01 per share (the "Series A
Preferred Stock"), of the Company at a price of $225.00 per Unit (the "Purchase
Price"), subject to adjustment. The description and terms of the Rights are set
forth in a Rights Agreement dated as of May 13, 1998 (the "Rights Agreement")
between the Company and BankBoston, N.A., as Rights Agent (the "Rights Agent").

               Until the earlier to occur of (i) 10 days following the first
date of public announcement that a person or group of affiliated or associated
persons (an "Acquiring Person") have acquired beneficial ownership of 15% or
more of the outstanding Common Stock or (ii) 10 business days (or such later
date as may be determined by action of the Continuing Directors prior to such
time as any Person becomes an Acquiring Person) following the commencement of,
or announcement of an intention to make, a tender offer or exchange offer the
consummation of which would result in the beneficial ownership by a person or
group of 15% or more of such outstanding Common Stock (the earlier of such dates
being called the "Distribution Date"), the Rights will be evidenced, with
respect to any of the Common Stock certificates outstanding as of the Record
Date, by such Common Stock certificate with a copy of this Summary of Rights
attached thereto.

               The Rights Agreement provides that, until the Distribution Date,
the Rights will be transferred with and only with the Common Stock. Until the
Distribution Date (or earlier redemption or expiration of the Rights), new
Common Stock certificates issued after the Record Date, upon transfer or new
issuance of Common Stock will contain a notation incorporating the Rights
Agreement by reference. Until the Distribution Date (or earlier redemption or
expiration of the Rights), the surrender for transfer of any certificates for
Common Stock, outstanding as of the Record Date, even without such notation or a
copy of this Summary of Rights being attached thereto, will also constitute the
transfer of the Rights associated with the Common Stock represented by such
certificate. As soon as practicable following the Distribution Date, separate

                                      C-1.

<PAGE>   57
certificates evidencing the Rights ("Rights Certificates") will be mailed to
holders of record of the Common Stock as of the Close of Business on the
Distribution Date and such separate Rights Certificates alone will evidence the
Rights.

               The Rights are not exercisable until the Distribution Date. The
Rights will expire at the close of business on May 25, 2008 (the "Final
Expiration Date"), unless the Final Expiration Date is extended or unless the
Rights are earlier redeemed or exchanged by the Company, in each case as
described below.

               The Purchase Price payable, and the number of Units of Preferred
Stock or other securities or property issuable, upon exercise of the Rights are
subject to adjustment from time to time to prevent dilution (i) in the event of
a stock dividend on, or a subdivision, combination or reclassification of, the
Preferred Stock, (ii) upon the grant to holders of the Units of Preferred Stock
of certain rights or warrants to subscribe for or purchase Units of Preferred
Stock at a price, or securities convertible into Units of Preferred Stock with a
conversion price, less than the then current market price of the Units of
Preferred Stock or (iii) upon the distribution to holders of the Units of
Preferred Stock of evidences of indebtedness or assets (excluding regular
periodic cash dividends paid out of earnings or retained earnings or dividends
payable in Units of Preferred Stock) or of subscription rights or warrants
(other than those referred to above).

               The number of outstanding Rights and the number of Units of
Preferred Stock issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Stock or a stock dividend
on the Common Stock payable in Common Stock or subdivisions, consolidations or
combinations of the Common Stock occurring, in any such case, prior to the
Distribution Date.

               Units of Preferred Stock purchasable upon exercise of the Rights
will not be redeemable. Each Unit of Preferred Stock will be entitled to a
dividend equal to any dividend declared per share of Common Stock. In the event
of liquidation, each Unit of Preferred Stock will be entitled to a payment equal
to any payment made per share of Common Stock. Each Unit of Preferred Stock will
have one vote, voting together with the Common Stock. Finally, in the event of
any merger, consolidation or other transaction in which shares of Common Stock
are exchanged, each Unit of Preferred Stock will be entitled to receive an
amount equal to the amount received per share of Common Stock. These rights are
protected by customary anti-dilution provisions.

               Because of the nature of the dividend, liquidation and voting
rights, the value of each Unit of Preferred Stock purchasable upon exercise of
the Rights should approximate the value of one share of Common Stock.

               In the event that, after the Rights become exercisable, the
Company is acquired in a merger or other business combination transaction with
an Acquiring Person or an affiliate

                                      C-2.

<PAGE>   58
thereof, or 50% or more of its consolidated assets or earning power are sold to
an Acquiring Person or an affiliate thereof, proper provision will be made so
that each holder of a Right will thereafter have the right to receive, upon
exercise thereof at the then current exercise price of the Rights, that number
of shares of common stock of the acquiring company which at the time of such
transaction will have a market value of two times the exercise price of the
Rights.

               In the event that any person or group of affiliated or associated
persons becomes the beneficial owner of 15% or more of the outstanding shares of
Common Stock proper provision shall be made so that each holder of a Right,
other than Rights beneficially owned by the Acquiring Person (which will
thereafter be void), will thereafter have the right to receive upon exercise
that number of shares of Common Stock or Units of Preferred Stock (or cash,
other securities or property) having a market value of two times the exercise
price of the Rights.

               At any time after the acquisition by a person or group of
affiliated or associated persons of beneficial ownership of 15% or more of the
outstanding shares of Common Stock and prior to the acquisition by such person
or group of 50% or more of the outstanding Common Stock, the Continuing
Directors of the Company may exchange all or part of the Rights (other than
Rights owned by such person or group which have become void) for Units of
Preferred Stock at an exchange ratio of (subject to adjustment) which shall
equal, subject to adjustment to reflect stock splits, stock dividends and
similar transactions occurring after the date hereof, that number obtained by
dividing the Purchase Price by the then current per share market price per Unit
of Preferred Stock on the earlier of (i) the date on which any Person becomes an
Acquiring Person and (ii) the date on which a tender or exchange offer is
announced by any Person, if upon consummation thereof such Person would be the
Beneficial Owner of 15% or more of the shares of Company Common Stock then
outstanding.

               With certain exceptions, no adjustment in the Purchase Price will
be required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional shares of Preferred Stock will be issued
(other than fractions which are integral multiples of one one-thousandth of a
share of Preferred Stock, which may, at the election of the Company, be
evidenced by depositary receipts) and, in lieu thereof, an adjustment in cash
will be made based on the market price of the Units of Preferred Stock on the
last trading day prior to the date of exercise.

               At any time prior to the Distribution Date, the Board of
Directors of the Company may redeem the Rights in whole, but not in part, at a
price of $0.01 per Right (the "Redemption Price"), upon the approval of a
majority of the Continuing Directors. The redemption of the rights may be made
effective at such time on such basis and with such conditions as the Board of
Directors, upon the approval of the Continuing Directors, in its sole discretion
may establish. Immediately upon any redemption of the Rights, the right to
exercise the Rights will terminate and the only right of the holders of Rights
will be to receive the Redemption Price. The Rights are also redeemable under
other circumstances as specified in the Rights Agreement.

                                      C-3.

<PAGE>   59
               The terms of the Rights may be amended by the Board of Directors
of the Company, upon the approval of a majority of the Continuing Directors,
without the consent of the holders of the Rights except that from and after a
Distribution Date no such amendment may adversely affect the interests of the
holders of the Rights.

               Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.

               The Rights have certain anti-takeover effects. The Rights will
cause substantial dilution to a person or group that attempts to acquire the
Company on terms not approved by the Company's Board of Directors, except
pursuant to an offer conditioned on a substantial number of rights being
acquired. The Rights should not interfere with any merger or other business
combination approved by the Board of Directors because the Rights may be
redeemed by the Company at the Redemption Price prior to the occurrence of a
Distribution Date.

               A copy of the Rights Agreement has been filed with the Securities
and Exchange Commission as an Exhibit to a Registration Statement on Form 8-A. A
copy of the Rights Agreement is available free of charge from the Company. This
summary description of the Rights does not purport to be complete and is
qualified in its entirety by reference to the Rights Agreement, which is hereby
incorporated herein by reference.

                                      C-4.



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