CORSAIR COMMUNICATIONS INC
8-A12G, 1998-12-03
COMPUTER INTEGRATED SYSTEMS DESIGN
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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



                          CORSAIR COMMUNICATIONS, INC.
- --------------------------------------------------------------------------------
               (Exact name of registrant as specified in charter)

               DELAWARE                       0-25356           77-0390406
- --------------------------------------------------------------------------------
(State of incorporation or organization)    (Commission        (IRS Employer
                                             File Number)    Identification No.)


3408 Hillview Avenue, Palo Alto, California 94304
- --------------------------------------------------------------------------------
(Address of principal executive offices)


Registrant's telephone number, including area code (650) 842-3300


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 November 18, 1998,, the Board of Directors of Corsair
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 $.001 per share, of the Company. The dividend is
payable on December 4, 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 $.001 per share (the "Series A
Preferred Stock"), of the Company at a price of $40.00 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 November 18, 1998 (the "Rights
Agreement") between the Company and Bank Boston N.A., as Rights Agent (the
"Rights Agent").

                  Until the earlier to occur of (i) the close of business on 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 Board of 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 November 18, 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 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 



                                       3
<PAGE>   3

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 antidilution provisions.

                  Because of the nature of the dividend, liquidation and voting
rights, and the value of the Series A Preferred Stock, the Units of Series A
Preferred Stock purchasable upon exercise of each Right 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 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 Units of Series A Preferred Stock (or cash, Common
Stock, 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 Board of 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 close of business on the first
date of a public announcement that a person or group of affiliated or associated
persons acquire beneficial ownership of 15% or more of the outstanding Common
Stock (unless the Board of Continuing Directors extends such ten-day period),
the Board of Directors of the Company may redeem the Rights in whole, but not in
part, at a price of $.001 per Right (the "Redemption Price"). The redemption of
the rights may be made effective at such time on such basis and with such
conditions as the Board of 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.

                  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 except
that from and after a Distribution Date no such amendment may adversely affect
the interests of the holders of the Rights.



                                       4
<PAGE>   4

                  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 November 18, 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 November 18, 1998, between the Company
         and Bank Boston 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 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 (10th) business day (or such later date
         as may be determined by action of the Board of 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.



                                       5
<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.





                                       CORSAIR COMMUNICATIONS, INC.



                                       By: /s/  Mary Ann Byrnes
                                           -------------------------------------
                                           Name:  Mary Ann Byrnes
DATE:  November 20, 1998                   President and Chief Executive Officer



                                       6
<PAGE>   6
                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                            DOCUMENT DESCRIPTION
- -------                           --------------------
<S>      <C>
1.       Rights Agreement, dated as of November 18, 1998, between the Company
         and Bank Boston 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 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 (10th) business day (or such later date as may
         be determined by action of the Board of 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.
</TABLE>



                                       7

<PAGE>   1

                          CORSAIR COMMUNICATIONS, INC.



                                       AND



                                BANK BOSTON N.A.



                                 (RIGHTS AGENT)



                                RIGHTS AGREEMENT



                          DATED AS OF NOVEMBER 18, 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..................................  5

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...........................................  8

Section 7.        Exercise of Rights; Purchase Price; Expiration Date of 
                  Rights........................................................  9

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

Section 9.        Reservation and Availability of Preferred Stock............... 11

Section 10.       Preferred Stock Record Date................................... 12

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.... 20

Section 13.       Consolidation, Merger or Sale or Transfer of Assets or 
                  Earning Power................................................. 21

Section 14.       Fractional Rights and Fractional Shares....................... 24

Section 15.       Rights of Action.............................................. 24

Section 16.       Agreement of Rights Holders................................... 25

Section 17.       Rights Certificate Holder Not Deemed a Stockholder............ 25

Section 18.       Concerning the Rights Agent................................... 26

Section 19.       Merger or Consolidation or Change of Name of Rights Agent..... 26

Section 20.       Duties of Rights Agent........................................ 27

Section 21.       Change of Rights Agent........................................ 29

Section 22.       Issuance of New Rights Certificates........................... 30

Section 23.       Redemption and Termination.................................... 30

Section 24.       Exchange...................................................... 31

Section 25.       Notice of Certain Events...................................... 32

Section 26.       Notices....................................................... 33

Section 27.       Supplements and Amendments.................................... 34

Section 28.       Successors.................................................... 34

Section 29.       Determinations and Actions by the Board of Directors.......... 34
</TABLE>


                                       i

<PAGE>   3
                               TABLE OF CONTENTS
                                  (continued)

<TABLE>
<S>                                                                              <C>
Section 30.       Benefits of This Agreement.................................... 35

Section 31.       Severability.................................................. 35

Section 32.       Governing Law................................................. 35

Section 33.       Counterparts.................................................. 35

Section 34.       Descriptive Headings.......................................... 35
</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 Junior 
                Participating Preferred Stock



                                      ii.

<PAGE>   4
                                RIGHTS AGREEMENT

                  RIGHTS AGREEMENT, dated as of November 18, 1998, between
Corsair Communications, Inc., a Delaware corporation (the "Company"), and Bank
Boston, N.A., a national banking association (the "Rights Agent").

                  WHEREAS, effective November 17, 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 December 4, 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:

                  (a) "Acquiring Person" shall mean 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 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, then such Person shall be deemed
         to be an "Acquiring Person" hereunder; and

                  (ii) if the Board of Directors of the Company determines 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



                                       1.
<PAGE>   5

         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.

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

                  (c) "Affiliate" and "Associate" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), as in effect on the date of this Agreement.

                  (d) 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 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) of this
         paragraph (d)) 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 



                                       2.
<PAGE>   6

         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;

                  (iv) 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.

                  (e) "Business Day" shall mean any day other than a Saturday, a
Sunday, or a day on which banking institutions in the Commonwealth of
Massachusetts are authorized or obligated by law or executive order to close.

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

                  (g) "Common Stock" when used with reference to the Company
shall mean the shares of common stock of the Company, par value $0.001 per
share. "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.

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

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

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

                  (k) "Directors" shall mean the members of the Board of
Directors of the Company.

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

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

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



                                       3.
<PAGE>   7
                  (o) "Exchange Act Regulations" shall mean the General Rules
and Regulations under the Exchange Act.

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

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

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

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

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

                  (u) "Preferred Stock" shall mean shares of Series A Junior
Participating Preferred Stock, par value $0.001, of the Company having the
rights and preferences set forth in the Form of Certificate of Designation
attached to this Agreement as Exhibit A.

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

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

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

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

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

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

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

                  (cc) "Rights Certificate" shall have the meaning set forth in
Section 3(a) hereof.

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

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



                                       4.
<PAGE>   8

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

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

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

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

                  (jj) "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.

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

                  (ll) "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.

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

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

                  (oo) "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 shall in
no event be liable for, the acts or omissions of any such co-Rights Agent.

                  Section 3. Issue of Rights Certificates.

                  (a) Until the earlier of (i) the Close of Business on the
Shares Acquisition Date and (ii) the Close of Business on the tenth Business Day
(or such later date as may be determined by a majority of the 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 



                                       5.
<PAGE>   9
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 Shares of Series
A Junior Participating 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.

                  (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
                  Corsair Communications, Inc. and Bank Boston, N.A., dated as
                  of November 18, 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
                  Corsair 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. 



                                       6.
<PAGE>   10

                  Corsair 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, or held by, any Person who is, was or becomes an
                  Acquiring Person or any Affiliate or Associate thereof (as
                  such terms are 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
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 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:



                                       7.
<PAGE>   11

                  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 Corsair
                  Communications, Inc. and Bank Boston, N.A., as Rights Agent,
                  dated as of November 18, 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.

                  (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 



                                       8.
<PAGE>   12

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.

                  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 Forty Dollars ($40.00),
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 



                                       9.
<PAGE>   13

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 of 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 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 (a "Post Transferee"), (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 a majority of the 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) (a "Prior Transferee") or (iv) any subsequent
transferee receiving transferred Rights from a Post Transferee or a Prior
Transferee, either directly or through one or more intermediate transferees,
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 



                                      10.
<PAGE>   14

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 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, 



                                      11.
<PAGE>   15

(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 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 aggregate 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




                                      12.
<PAGE>   16

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.

                  (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 of 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 



                                      13.
<PAGE>   17

         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, 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), 50% or more of the Company's assets (including
         securities or intangible assets) 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-



                                      14.
<PAGE>   18

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").

                  (iii) In the event that the number of Units of Preferred Stock
         which are authorized by the Company's 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 Directors: (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 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 based upon
         the advice of a nationally recognized investment banking firm selected
         by the Board of Directors of the Company; 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), except to the extent that the Company has not
         obtained any necessary regulatory approval for such issuance, 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 stock (or having a conversion price per share, if
a security convertible into Units of Preferred Stock or 



                                      15.
<PAGE>   19

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 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 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 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) 



                                      16.
<PAGE>   20

         immediately prior to such date; provided, however, that in the event
         that the "current per 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 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 below
         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, 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.



                                      17.
<PAGE>   21

                  (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-thousandth) obtained
by dividing 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 



                                      18.
<PAGE>   22

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 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.




                                      19.
<PAGE>   23

                  (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 Sections 23, 24 or 27, 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 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 



                                      20.
<PAGE>   24

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 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 



                                      21.
<PAGE>   25

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
         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 



                                      22.
<PAGE>   26

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 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).



                                      23.
<PAGE>   27

                  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 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
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 a 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, 



                                      24.
<PAGE>   28

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;

                  (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 



                                      25.
<PAGE>   29

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. Anything to the contrary
notwithstanding, in no event shall the Rights Agent be liable for special,
indirect, consequential or incidental loss or damage of any kind whatsoever
(including but not limited to lost profits), even if the Rights Agent has been
advised of the likelihood of such damages. 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.

                  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 



                                      26.
<PAGE>   30

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 opinion 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 Chief Financial Officer, or the Secretary or
any Assistant 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 or suffered 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, bad faith 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.



                                      27.
<PAGE>   31

                  (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.

                  (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 Chief Financial
Officer, the Secretary or any Assistant Secretary of the Company, and to apply
to such officers for advice or instructions in connection with its duties, and
it shall not be liable for any action taken or suffered 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.



                                      28.
<PAGE>   32

                  (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 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 either (A) 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 or (B) an affiliate of such a corporation. 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 



                                      29.
<PAGE>   33

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 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
following the Distribution Date and prior to the redemption or expiration of the
Rights, 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 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. Any rights Certificate issued pursuant to this
Section 22 shall have impressed on, printed on, written on or otherwise affixed
to and shall be subject to the legend set forth in Section 3(c) hereof.

                  Section 23. Redemption and Termination.

                  (a) The Company may, at its option, upon approval by a
majority of the Directors, at any time prior to the earlier of (i) the Shares
Acquisition 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 Directors in their sole discretion may
establish.



                                      30.
<PAGE>   34

                  (b) Immediately upon the action of a majority of the 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
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 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 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 



                                      31.
<PAGE>   35

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 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 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 Directors. To the
extent that the Company determines that some action need be taken pursuant to
subsection (a) of this Section 24, the Board of 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, 



                                      32.
<PAGE>   36

(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 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 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:

                     Corsair Communications, Inc.
                     3408 Hillview Avenue
                     Palo Alto, CA  94304
                     Attention:  President

with a copy to:      Brobeck, Phleger & Harrison LLC
                     550 West C Street, Suite 1200
                     San Diego, CA  92101
                     Attention:  John A. Denniston

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 



                                      33.
<PAGE>   37

on 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:

                  Bank Boston, N.A.
                  c/o Boston EquiServe Limited Partnership
                  150 Royall Street
                  Canton, MA  02021
                  Attn:  Client Administration

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 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 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), including, without limitation, to change the Purchase
Price, the Redemption Price, any time periods herein specified, and any other
term hereof, any such supplement or amendment to be evidenced by a writing
signed by the Company and the Rights Agent; provided, however, that from and
after such time as any Person becomes an Acquiring Person, this Agreement shall
not be amended in any manner which would adversely affect the interests of the
holders of Rights. 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.

                  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. 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 



                                      34.
<PAGE>   38

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 (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 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 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 or convenience only and shall
not control or affect the meaning or construction of any of the provisions
hereof.

                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]



                                      35.
<PAGE>   39
                  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.


ATTEST:                                CORSAIR COMMUNICATIONS, INC



By:_______________________________     By: _____________________________________
   Name:  John A. Denniston                Name:  Mary Ann Byrnes
   Title:  Counsel for Corsair             Title: President and Chief Executive
           Communications, Inc.            Officer


ATTEST:                                BANK BOSTON, N.A.
                                       as Rights Agent


By:_______________________________     By: _____________________________________
   Name:__________________________         Name:________________________________
   Title:_________________________         Title:_______________________________



                                      36.
<PAGE>   40
                                                                       Exhibit A


                                      FORM


                                       of

                           CERTIFICATE OF DESIGNATION

                                       of


                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK


                                       of


                          CORSAIR COMMUNICATIONS, INC.


                         (Pursuant to Section 151 of the

                        Delaware General Corporation Law)

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

                  CORSAIR 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 November 17,
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 Certificate
of Incorporation, the Board of Directors hereby creates a series of Preferred
Stock, par value $.001 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 One Million Five Hundred Thousand (1,500,000). Such
number of shares may be increased or decreased by resolution of the Board of
Directors; provided, that no decrease shall reduce the number of shares 



                                      A-1
<PAGE>   41

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 $.001 per share (the
         "Common Stock"), of the Corporation, and of any other junior stock,
         shall be entitled to receive, when, as and if 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 Dividend Payment Date and the
         next subsequent Quarterly Dividend Payment Date, a dividend of $1.00
         per share of Series A Preferred Stock shall nevertheless be payable on
         such subsequent Quarterly Dividend Payment Date.



                                      A-2
<PAGE>   42

                  (C) Dividends shall begin to accrue and be cumulative on each
         outstanding share of Series A Preferred Stock from the Quarterly
         Dividend Payment Date next preceding the date of issue of such share of
         Series A 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 Designation 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.

                  (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.



                                      A-3
<PAGE>   43

                  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.

                  (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




                                      A-4
<PAGE>   44

forth herein, in the Certificate of Incorporation, or in any other Certificate
of Designation 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 (the "Series A
         Liquidation Preference"), 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 (the "Common Adjustment"), 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 (the "Adjustment Number").

                  (B) In the event, however, that there are not sufficient
         assets available to permit payment in full of 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
         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 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
         November 17, 1998 (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 



                                      A-5
<PAGE>   45

         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.

                  IN WITNESS WHEREOF, this Certificate of Designation is
executed on behalf of the Corporation by its President and Chief Executive
Officer this ___ day of November, 1998.





                                       _________________________________________
                                       Name:  Mary Ann Byrnes
                                       Title:  President and Chief 
                                               Executive Officer


                                      A-6
<PAGE>   46
                                                                       Exhibit B


                           Form of Rights Certificate


Certificate No. R-                                               ________ Rights



                  NOT EXERCISABLE AFTER NOVEMBER 18, 2008 OR EARLIER IF
                  REDEMPTION OR EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO
                  REDEMPTION AT THE OPTION OF THE COMPANY AT $0.001 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.(1)]



                               Rights Certificate


                          CORSAIR 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 November 18, 1998 


- ----------
       (1) The portion of the legend in bracket shall be inserted only if
applicable and shall replace the preceding sentence.

                                      B-1
<PAGE>   47

(the "Rights Agreement"), between Corsair Communications, Inc., a Delaware
corporation (the "Company"), and Bank Boston, 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., Eastern time, on
November 18, 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 $.001 per share (the "Series A Preferred Stock") of the
Company, at a purchase price of $40.00 per Unit of Series A Preferred Stock (the
"Purchase Price"), upon presentation and surrender of this Rights 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
November 18, 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 $0.001 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 



                                      B-2
<PAGE>   48

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.

                  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 _____________________.


ATTEST:                                CORSAIR COMMUNICATIONS, INC.




__________________________________     By_______________________________________
Name:  ___________________________       Name:  Mary Ann Byrnes
Title:  __________________________       Title: President and Chief 
                                                Executive Officer


Countersigned:

BANK BOSTON, N.A.
as Rights Agent


By________________________________
      Authorized Signatory



                                      B-3
<PAGE>   49
                   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>   50
                                   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>   51
                          FORM OF ELECTION TO PURCHASE



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



To: CORSAIR COMMUNICATIONS, INC.


                  The undersigned hereby irrevocably elects to exercise
________________ Rights represented by this Rights Certificate to purchase the
units of Series A Junior Participating Preferred Stock issuable upon the
exercise of such Rights and requests that certificates for such Series A Junior
Participating 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>   52
                                   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>   53
                                                                       Exhibit C


                          CORSAIR COMMUNICATIONS, INC.


                          SUMMARY OF RIGHTS TO PURCHASE

             SHARES OF SERIES A JUNIOR PARTICIPATING PREFERRED STOCK



                  On November 17, 1998 the Board of Directors of Corsair
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 $.001 per share, of the Company. The dividend is
payable on December 4, 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 $.001 per share (the "Series A
Preferred Stock"), of the Company at a price of $40.00 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 November 18, 1998 (the "Rights
Agreement") between the Company and Bank Boston, N.A., as Rights Agent (the
"Rights Agent").

                  Until the earlier of (i) the close of business on 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 and (ii) the close of business on the tenth
business day (or such later date as may be determined by a majority of the Board
of 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, subject to certain conditions, 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.



                                      C-1
<PAGE>   54

                  The Rights are not exercisable until the Distribution Date.
The Rights will expire at the close of business on November 17, 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 antidilution 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 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 



                                      C-2
<PAGE>   55

the Acquiring Person (which will thereafter be void), will thereafter have the
right to receive upon exercise that number of shares of Units of Preferred Stock
(or cash, common stock, 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 Board of 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.

                  The Company may, at its option, upon approval by a majority of
the Board of Directors, at any time prior to the earlier of (i) the Shares
Acquisition Date, or (ii) the close of business on the tenth anniversary of the
Rights Agreement redeem the Rights in whole, but not in part, at a price of
$0.001 per Right (the "Redemption Price"). The redemption of the rights may be
made effective at such time on such basis and with such conditions as the Board
of 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.

                  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 Board of 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 



                                      C-3
<PAGE>   56

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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