PREMISYS COMMUNICATIONS INC
8-A12G, 1998-09-22
TELEPHONE & TELEGRAPH APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                    ---------

                                    FORM 8-A



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



                          PREMISYS COMMUNICATIONS, INC.
             (Exact name of registrant as specified in its charter)



                    Delaware                                 94-3153847
  (State of incorporation or organization)                 (I.R.S. Employer
                                                           Identification No.)


               48664 Milmont Drive
               Fremont, California                             94538
    (Address of principal executive offices)                 (Zip code)


               If this Form relates to the registration of a class
                 of securities pursuant to Section 12(b) of the
                Exchange Act and is effective pursuant to General
                 Instruction A. (c), please check the following
                                    box. [ ]

              If this Form relates to the registration of a class
                 of Securities pursuant to Section 12(g) of the
               Exchange Act and is effective pursuant to General
                 Instruction A. (d), please check the following
                                    box. [X]



Securities  Act  registration  statement file number to which this form relates:
                                 Not applicable.


                     Securities to be registered pursuant to
                         Section 12(b) of the Act: None.


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



                         Preferred Stock Purchase Rights
                                (Title of Class)




<PAGE>






Item 1:           Description of Registrant's Securities to be Requested:

                  On  September  17,  1998,  the Board of  Directors of Premisys
Communications,  Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of common stock, par value
$0.01 per share (the "Common Shares"),  of the Company.  The dividend is payable
to stockholders  of record on October 5, 1998 (the "Record Date").  In addition,
one Right shall be issued with each Common  Share that becomes  outstanding  (i)
between  the  Record  Date  and  the  earliest  of the  Distribution  Date,  the
Redemption Date and the Final  Expiration Date (as such terms are defined in the
Rights Agreement  discussed  below) or (ii) following the Distribution  Date and
prior to the Redemption Date or Final Expiration Date,  pursuant to the exercise
of  stock  options,  or  under  any  employee  plan or  arrangement  or upon the
exercise,  conversion  or exchange of other  securities  of the  Company,  which
options or securities  were  outstanding  prior to the  Distribution  Date. Each
Right  entitles  the  registered   holder  to  purchase  from  the  Company  one
one-hundredth of a share of Series A Junior  Participating  Preferred Stock, par
value $0.01 per share (the "Preferred  Shares"),  of the Company,  at a price of
$80.00  per one  one-hundredth  of a  Preferred  Share (the  "Purchase  Price"),
subject to adjustment.  The description and terms of the Rights are set forth in
a Rights Agreement (the "Rights Agreement") between the Company and Chase Mellon
Shareholder Services L.L.C., as Rights Agent (the "Rights Agent").

                  Until the  earlier to occur of (i) 10 days  following a public
announcement  or  disclosure  that a person or group of affiliated or associated
persons (an "Acquiring  Person"),  has acquired beneficial ownership of 20% (the
"Designated  Percentage")  or more of the  outstanding  Common Shares 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  announcement  of an intention to make a tender offer or exchange
offer the  consummation  of which would result in a person or group  becoming an
Acquiring  Person  (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  Share
certificates  with a copy of a Summary  of Rights  attached  thereto.  No person
shall  become  an  Acquiring  Person if the Board of  Directors  of the  Company
determines  in good  faith  that a Person who would  otherwise  be an  Acquiring
Person has become such inadvertently, and such Person as promptly as practicable
takes such action as may be  necessary  so that such  Person  would no longer be
considered an Acquiring Person.

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

                  The Rights are not exercisable  until the  Distribution  Date.
The Rights will expire on  September  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 Preferred Shares
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 payable in Preferred  Shares on, or a subdivision,  combination
or reclassification  of, the Preferred Shares, (ii) upon the grant to holders of
the Preferred  Shares of certain rights or warrants to subscribe for or purchase
Preferred  Shares at a price, or securities  convertible  into Preferred  Shares
with a  conversion  price,  less  than  the  then  current  market  price of the
Preferred  Shares or (iii) upon the  distribution  to  holders of the  Preferred
Shares of evidences of indebtedness or assets  (excluding  regular periodic cash
dividends  paid out of  earnings or retained  earnings or  dividends  payable in
Preferred  Shares)  or of  subscription  rights or  warrants  (other  than those
referred to above).

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

                  Preferred Shares  purchasable upon exercise of the Rights will
not be redeemable. Each Preferred Share will be entitled to a quarterly dividend
payment of 100 times the  dividend  declared per Common  Share.  In the event of
liquidation,  each Preferred Share will be entitled to a $1.00  preference,  and
thereafter the holders of the Preferred  Shares will be entitled to an aggregate
payment of 100 times the aggregate payment made per Common Share. Each Preferred
Share will have 100 votes,  voting together with the Common Shares.  Finally, in
the event of any merger,  consolidation  or other  transaction  in which  Common
Shares are exchanged, each Preferred Share will be entitled to receive 100 times
the amount  received per Common  Share.  These rights are protected by customary
antidilution provisions.

                  Because  of the  nature  of the  Preferred  Shares'  dividend,
liquidation and voting rights, the value of the one one-hundredth  interest in a
Preferred Share  purchasable upon exercise of each Right should  approximate the
value of one Common Share.

                  In the event that any  person  becomes  an  Acquiring  Person,
unless the event causing the Designated  Percentage  threshold to be crossed and
the Person to thereby  become an Acquiring  Person is a merger,  acquisition  or
other business  combination  described in the next  paragraph,  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 Common  Shares  having a market  value of two times the  exercise
price  of the  Right  on the  terms  and  conditions  set  forth  in the  Rights
Agreement.  If the Company does not have  authorized but unissued  Common Shares
sufficient  to satisfy such  obligation to issue Common  Shares,  the Company is
obligated to deliver upon payment of the exercise  price of a Right an amount of
cash or other securities  equivalent in value to the Common Shares issuable upon
exercise of a Right.

                  In the event  that any person or group  becomes  an  Acquiring
Person  and the  Company  merges  into or  engages  in  certain  other  business
combination  transactions  with  an  Acquiring  Person  or  50% or  more  of its
consolidated  assets or  earning  power are sold to an  Acquiring  Person,  each
holder of a Right, other than Rights  beneficially owned by an Acquiring Person,
will thereafter have the right to receive, upon the exercise thereof at the then
current  exercise  price of the Right,  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 Right.

                  At any time after any person  becomes an Acquiring  Person and
prior  to the  acquisition  by  such  person  or  group  of 50% or  more  of the
outstanding  Common  Shares,  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 Common  Share,  or one
one-hundredth  of a  Preferred  Share (or of a share of a class or series of the
Company's preferred stock having equivalent rights, preferences and privileges),
per Right (subject to adjustment).

                  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  Preferred Shares will be issued (other
than fractions which are integral  multiples of one one-hundredth of a Preferred
Share,  which may, at the  election of the Company,  be evidenced by  depository
receipts) and in lieu  thereof,  an adjustment in cash will be made based on the
market price of the  Preferred  Shares on the last trading day prior to the date
of exercise.

                  At any time prior to such time as a person or group becomes an
Acquiring Person, the Board of Directors of the Company may redeem the Rights in
whole, but not in part, at a price of $0.001 per Right (the "Redemption Price").
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.  After the period for redemption of the Rights has expired, the Board
may not amend the Rights  Agreement to extend the period for  redemption  of the
Rights. 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. Additionally,  the Rights shall not be exercisable
for  Common  Shares  upon a person  becoming  an  Acquiring  Person,  until  the
Company's right to redeem the Rights has terminated.

                  The terms of the Rights may be  amended by  resolution  of the
Board of  Directors,  without the  consent of the holders of the Rights,  except
that  from and after  such time as any  person  or group  becomes  an  Acquiring
Person,  no such amendment may adversely  affect the interests of the holders of
the Rights (other than an Acquiring Person).

                  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.

                  As of September 15, 1998, there were  approximately 26,164,363
of the Company's Common Shares outstanding. Each Common Share outstanding at the
close of  business  on October 5, 1998 will  receive  one Right.  As long as the
Rights are attached to the Common Shares,  one additional  Right shall be deemed
to be delivered  for each Common Share issued or  transferred  by the Company in
the future, including but not limited to Common Shares issuable upon exercise of
options  granted by the Company.  Five hundred  thousand  Preferred  Shares] are
initially  reserved for issuance upon exercise of the Rights,  such number to be
subject to adjustment from time to time in accordance with the Rights Agreement.

                  The Rights Agreement,  which specifies the terms of the Rights
and which includes as exhibits  thereto the form of Certificate of  Designations
of Series A Junior Participating  Preferred Stock, the Form of Right Certificate
and the form of  Summary of Rights to  Purchase  Preferred  Shares,  is filed as
Exhibit 4.01  hereto.  A copy of the  Certificate  of  Designations  of Series A
Junior  Participating  Preferred  Stock as filed with the Delaware  Secretary of
State,  which specifies the terms of the Preferred  Shares,  is filed as Exhibit
3.03 hereto.  The  aforementioned  exhibits  hereto are  incorporated  herein by
reference,  and the foregoing  description of the Rights and Preferred Shares is
qualified in its entirety by reference to such exhibits.

Item 2:           Exhibits

                  3.01           Registrant's     Amended    and     Restated
                                 Certificate of  Incorporation  as filed with
                                 the  Secretary  of  State  of the  State  of
                                 Delaware on April 12, 1995. (Incorporated by
                                 reference   to   Registrant's   Registration
                                 Statement   on  Form  S-1  filed   with  the
                                 Securities and Exchange  Commission  ("SEC")
                                 on August 1, 1995 (File #33-95266)).

                  3.02           Certificate  of  Amendment  of  Amended  and
                                 Restated  Certificate  of  Incorporation  of
                                 Registrant  (Incorporated  by  reference  to
                                 Registrant's Form 10-Q for the quarter ended
                                 December  29,  1995  filed  with  the SEC on
                                 February 12, 1996.)

                  3.03           Certificate of Designations specifying the 
                                 terms of the Series A Junior Participating
                                 Preferred Stock of the Registrant, as filed
                                 with the Delaware Secretary of State on
                                 September 22, 1998.

                  3.04           Registrant's Bylaws, as amended.

                  4.04           Rights  Agreement  dated  September 18, 1998
                                 between    Registrant   and   Chase   Mellon
                                 Shareholder   Services  L.L.C.,   as  Rights
                                 Agent,  which includes as Exhibit A the form
                                 of Certificate of  Designations  of Series A
                                 Junior  Participating  Preferred  Stock,  as
                                 Exhibit B the Form of Rights Certificate and
                                 as  Exhibit  C  the  Summary  of  Rights  to
                                 Purchase   Preferred   Shares.   The  Rights
                                 Certificates  will not be distributed  until
                                 after the Distribution Date (as that term is
                                 defined in the Rights Agreement).



<PAGE>



                                    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.

Dated:  September 22, 1998

                                           PREMISYS COMMUNICATIONS, INC.



                                           By:    /s/ Robert W. Dilfer
                                                  -----------------------------
                                                  Robert W. Dilfer
                                                  Vice President and Controller





<PAGE>






                                  EXHIBIT INDEX

Exhibit

3.01     Registrant's Amended and Restated Certificate of Incorporation as filed
         with the Secretary of State of the State of Delaware on April 12, 1995.
         (Incorporated  by reference to Registrant's  Registration  Statement on
         Form S-1 filed with the Securities and Exchange  Commission  ("SEC") on
         August 1, 1995 (File #33-95266)).

3.02     Certificate  of  Amendment  of  Amended  and  Restated  Certificate  of
         Incorporation of Registrant  (Incorporated by reference to Registrant's
         Form 10-Q for the quarter ended December 29, 1995 filed with the SEC on
         February 12, 1996.)

3.03     Certificate of Designations specifying the terms of the Series A Junior
         Participating  Preferred  Stock of the  Registrant,  as filed  with the
         Delaware Secretary of State on September 22, 1998.

3.04     Registrant's Bylaws, as amended.

4.04     Rights Agreement dated September 18, 1998 between  Registrant and Chase
         Mellon Shareholder  Services L.L.C., as Rights Agent, which includes as
         Exhibit A the form of  Certificate of  Designations  of Series A Junior
         Participating  Preferred  Stock,  as  Exhibit  B  the  Form  of  Rights
         Certificate  and  as  Exhibit  C the  Summary  of  Rights  to  Purchase
         Preferred Shares. The Rights Certificates will not be distributed until
         after the  Distribution  Date (as that term is  defined  in the  Rights
         Agreement).



<PAGE>




                                                                   Exhibit 3.03

                           CERTIFICATE OF DESIGNATIONS
                                       of
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       of

                          PREMISYS COMMUNICATIONS, INC.
                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)



         Premisys  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 September 17, 1998:

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

         Series A Junior Participating Preferred Stock:

         Section 1.  Designation and Amount.  The shares of such series shall be
designated  as "Series A Junior  Participating  Preferred  Stock" (the "Series A
Preferred  Stock") and the number of shares  constituting the Series A Preferred
Stock shall be 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 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 other stock) ranking prior and superior to the
Series A Preferred  Stock with  respect to  dividends,  the holders of shares of
Series A Preferred 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 first 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 of
Series A  Preferred  Stock,  in an  amount  (if any) per share  (rounded  to the
nearest cent),  subject to the provision for adjustment  hereinafter  set forth,
equal to 100 times the aggregate per share amount of all cash dividends, and 100
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,
par value $0.01 per share (the "Common Stock"),  of the Company 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 any  share or  fraction  of a share 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 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 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).

                  (C)  Dividends  due pursuant to paragraph  (A) of this Section
shall  begin to  accrue  and be  cumulative  on  outstanding  shares of Series A
Preferred Stock from the Quarterly Dividend Payment Date next preceding the date
of issue of such shares, unless the date of issue of such shares is prior to the
record  date for the  first  Quarterly  Dividend  Payment  Date,  in which  case
dividends  on such  shares  shall begin to accrue from the date of issue of such
shares, 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 100  votes on all  matters  submitted  to a vote of the  stockholders  of the
Corporation.  In the event the Corporation  shall at any time declare or pay any
dividend  on the Common  Stock  payable in shares of Common  Stock,  or effect a
subdivision or combination or consolidation of the outstanding  shares of Common
Stock (by  reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the  number of votes per share to which  holders  of shares of
Series A Preferred Stock were entitled  immediately prior to such event shall be
adjusted by multiplying such number by a fraction, the numerator of which is the
number of shares of Common Stock  outstanding  immediately  after such event and
the  denominator  of which is the  number of shares  of Common  Stock  that were
outstanding immediately prior to such event.

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

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

         Section 4.        Certain Restrictions.

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

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

     (ii)  declare or pay  dividends,  or make any other  distributions,  on any
shares of stock ranking on a parity (either as to dividends or upon liquidation,
dissolution or winding up) with the Series A Preferred  Stock,  except dividends
paid ratably on the 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; or

     (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 (as to dividends and upon dissolution,  liquidation or winding up) to the
Series A Preferred Stock.

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

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

         Section 6.        Liquidation, Dissolution or Winding Up.

                  (A) Upon any  liquidation,  dissolution  or  winding up of the
Corporation, the holders of shares of Series A Preferred Stock shall be entitled
to receive,  prior and in  preference to any  distribution  of any assets of the
Corporation  to the holders of Common  Stock,  the amount of $1.00 per share for
each  share of  Series A  Preferred  Stock  then held by them.  Thereafter,  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 100 times the aggregate  amount to be distributed per share
to holders of shares of Common  Stock plus an amount  equal to any  accrued  and
unpaid dividends.  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
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) If the assets of the  Corporation  legally  available  for
distribution  to the  holders  of  shares  of  Series  A  Preferred  Stock  upon
liquidation,  dissolution or winding up of the Corporation  are  insufficient to
pay the full  preferential  amount set forth in the first  sentence of paragraph
(A) above,  then the entire  assets of the  Corporation  legally  available  for
distribution  to the  holders of Series A Preferred  Stock shall be  distributed
among such holders in proportion to the shares of Series A Preferred  Stock then
held by them.

                  (C) The  foregoing  rights upon  liquidation,  dissolution  or
winding up provided to the holders of Series A Preferred  Stock shall be subject
to the rights of the  holders  of any other  series of  Preferred  Stock (or any
other stock)  ranking  prior and  superior to the Series A Preferred  Stock upon
liquidation, dissolution or winding up.

         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  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 100  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.

         IN WITNESS  WHEREOF,  this  Certificate of  Designations is executed on
behalf  of the  Corporation  by its  President  and  attested  by its  Assistant
Secretary this 18th day of September, 1998.

                                     Company:

                                     PREMISYS COMMUNICATIONS, INC.


                                     By: /s/Nicholas J. Williams
                                         -----------------------------------
                                         Nicholas J. Williams, President and
                                         Chief Executive Officer

Attest:


By:_/s/Joel D. Kellman
    ---------------------------------------
       Joel D. Kellman, Assistant Secretary



<PAGE>




                                                                    Exhibit 3.04



















                                     BYLAWS

                                       OF

                          PREMISYS COMMUNICATIONS, INC.

                            (a Delaware corporation)

                           As Adopted October 18, 1994
                          As Amended December 15, 1994
                          As Amended September 17, 1998









<PAGE>




                                     BYLAWS
                                       OF
                          PREMISYS COMMUNICATIONS, INC.

                             A Delaware Corporation


                                TABLE OF CONTENTS

                                                                            PAGE

ARTICLE I - STOCKHOLDERS    ...............................................    1

         Section 1.1:       Annual Meetings................................    1

         Section 1.2:       Special Meetings...............................    1

         Section 1.3:       Notice of Meetings.............................    1

         Section 1.4:       Adjournments...................................    1

         Section 1.5:       Quorum.........................................    2

         Section 1.6:       Organization...................................    2

         Section 1.7:       Voting; Proxies................................    2

         Section 1.8:       Fixing Date for Determination of Stockholders
                            of Record      ................................    3

         Section 1.9:       List of Stockholders Entitled to Vote..........    3

         Section 1.10:      Action by Written Consent of Stockholders......    4

         Section 1.11:      Inspectors of Elections........................    5

         Section 1.12:      Notice of Stockholder Business; Nominations....    6


ARTICLE II - BOARD OF DIRECTORS............................................    8

         Section 2.1:       Number; Qualifications.........................    8

         Section 2.2:       Election; Resignation; Removal; Vacancies......    8


<PAGE>


                                                                            PAGE

         Section 2.3:       Regular Meetings...............................    8

         Section 2.4:       Special Meetings...............................    9

         Section 2.5:       Telephonic Meetings Permitted..................    9

         Section 2.6:       Quorum; Vote Required for Action...............    9

         Section 2.7:       Organization...................................    9

         Section 2.8:       Written Action by Directors....................    9

         Section 2.9:       Powers.........................................    9

         Section 2.10:      Compensation of Directors......................   10


ARTICLE III - COMMITTEES    ...............................................   10

         Section 3.1:       Committees.....................................   10

         Section 3.2:       Committee Rules................................   10


ARTICLE IV - OFFICERS       ...............................................   11

         Section 4.1:       Generally......................................   11

         Section 4.2:       Chief Executive Officer........................   11

         Section 4.3:       Chairman of the Board..........................   12

         Section 4.4:       President......................................   12

         Section 4.5:       Vice President.................................   12

         Section 4.6:       Chief Financial Officer........................   12

         Section 4.7:       Treasurer......................................   12

         Section 4.8:       Secretary......................................   12

         Section 4.9:       Delegation of Authority........................   12


                                                                            PAGE

         Section 4.10:      Removal........................................   13


ARTICLE V - STOCK           ...............................................   13

         Section 5.l:       Certificates...................................   13

         Section 5.2:       Lost, Stolen or Destroyed Stock Certificates;
                            Issuance of New Certificate....................   13

         Section 5.3:       Other Regulations..............................   13


ARTICLE VI - INDEMNIFICATION...............................................   13

         Section 6.1:       Indemnification of Officers and Directors......   13

         Section 6.2:       Advance of Expenses............................   14

         Section 6.3:       Non-Exclusivity of Rights......................   14

         Section 6.4:       Indemnification Contracts......................   14

         Section 6.5:       Effect of Amendment............................   14


ARTICLE VII - NOTICES       ...............................................   15

         Section 7.l:       Notice.........................................   15

         Section 7.2:       Waiver of Notice...............................   15


ARTICLE VIII - INTERESTED DIRECTORS........................................   15

         Section 8.1:       Interested Directors; Quorum...................   15


ARTICLE IX - MISCELLANEOUS  ...............................................   16

         Section 9.1:       Fiscal Year....................................   16

         Section 9.2:       Seal...........................................   16


<PAGE>


                                                                            PAGE

         Section 9.3:       Form of Records................................   16

         Section 9.4:       Reliance Upon Books and Records................   16

         Section 9.5:       Certificate of Incorporation Governs...........   16

         Section 9.6:       Severability...................................   16


ARTICLE X - AMENDMENT       ...............................................   17

         Section 10.1:      Amendments.....................................   17




<PAGE>













                                     BYLAWS

                                       OF

                          PREMISYS COMMUNICATIONS, INC.

                            (a Delaware corporation)

                           As Adopted October 18, 1994
                          As Amended December 15, 1994
                          As Amended September 17, 1998

                                    ARTICLE I

                                  STOCKHOLDERS


         Section 1.1: Annual Meetings.  An annual meeting of stockholders  shall
be held for the  election  of  directors  at such date,  time and place,  either
within or without the State of Delaware,  as the Board of  Directors  shall each
year fix. Any other proper business may be transacted at the annual meeting.

         Section 1.2 Special Meetings.  Special meetings of stockholders for any
purpose or purposes may be called at any time by the Chairman of the Board,  the
Chief  Executive  Officer,  the  President  or by a  majority  of the  Board  of
Directors. Special meetings may not be called by any other person or persons. If
a special  meeting of stockholders is called by any person or persons other than
by a majority  of the  members of the Board of  Directors,  then such  person or
persons  shall call such meeting by  delivering  a written  request to call such
meeting to each  member of the Board of  Directors,  and the Board of  Directors
shall then  determine the time,  date and place of such special  meeting,  which
shall be held not more than one hundred  twenty (120) nor less than  thirty-five
(35) days after the written  request to call such special  meeting was delivered
to each member of the Board of Directors.

         Section  1.3:  Notice of  Meetings.  Written  notice of all meetings of
stockholders shall be given stating the place, date and time of the meeting and,
in the case of a special meeting,  the purpose or purposes for which the meeting
is called.  Unless  otherwise  required by applicable law or the  Certificate of
Incorporation of the  Corporation,  such notice shall be given not less than ten
(10) nor more  than  sixty  (60) days  before  the date of the  meeting  to each
stockholder entitled to vote at such meeting.

         Section 1.4: Adjournments. Any meeting of stockholders may adjourn from
time to time to reconvene at the same or another  place,  and notice need not be
given of any such  adjourned  meeting if the time,  date and place  thereof  are
announced at the meeting at which the adjournment is taken;  provided,  however,
that if the  adjournment  is for more than  thirty  (30)  days,  or if after the
adjournment a new record date is fixed for the adjourned meeting,  then a notice
of the adjourned  meeting shall be given to each  stockholder of record entitled
to vote at the meeting.  At the adjourned  meeting the  Corporation may transact
any business that might have been transacted at the original meeting.

         Section 1.5:  Quorum.  At each meeting of stockholders the holders of a
majority  of the shares of stock  entitled  to vote at the  meeting,  present in
person or represented by proxy, shall constitute a quorum for the transaction of
business, except if otherwise required by applicable law. If a quorum shall fail
to attend any meeting,  the chairman of the meeting or the holders of a majority
of the shares  entitled to vote who are present,  in person or by proxy,  at the
meeting may adjourn the meeting.  Shares of the Corporation's stock belonging to
the Corporation (or to another corporation, if a majority of the shares entitled
to vote in the  election  of  directors  of such  other  corporation  are  held,
directly or indirectly,  by the Corporation),  shall neither be entitled to vote
nor be counted for quorum purposes;  provided, however, that the foregoing shall
not limit  the right of the  Corporation  or any other  corporation  to vote any
shares of the Corporation's stock held by it in a fiduciary capacity.

         Section 1.6:  Organization.  Meetings of stockholders shall be presided
over by such person as the Board of Directors may designate,  or, in the absence
of such a person,  the Chairman of the Board, or, in the absence of such person,
the Chief  Executive  Officer  of the  Corporation,  or, in the  absence of such
person,  such person as may be chosen by the holders of a majority of the shares
entitled to vote who are present,  in person or by proxy,  at the meeting.  Such
person  shall be chairman of the meeting  and,  subject to Section  1.11 hereof,
shall  determine  the  order  of  business  and the  procedure  at the  meeting,
including such  regulation of the manner of voting and the conduct of discussion
as seems to him or her to be in order.  The Secretary of the  Corporation  shall
act as secretary  of the meeting,  but in his or her absence the chairman of the
meeting may appoint any person to act as secretary of the meeting.

         Section 1.7: Voting;  Proxies.  Unless otherwise provided by law or the
Certificate  of  Incorporation,  and subject to the provisions of Section 1.8 of
these Bylaws,  each stockholder shall be entitled to one (1) vote for each share
of  stock  held by such  stockholder.  Each  stockholder  entitled  to vote at a
meeting of stockholders, or to express consent or dissent to corporate action in
writing  without a meeting,  may authorize  another person or persons to act for
such  stockholder  by  proxy.  Such a proxy  may be  prepared,  transmitted  and
delivered  in any manner  permitted  by  applicable  law.  Voting at meetings of
stockholders  need not be by  written  ballot  unless  such is  demanded  at the
meeting  before voting begins by a stockholder  or  stockholders  holding shares
representing  at least one  percent  (1%) of the votes  entitled to vote at such
meeting,  or by such stockholder's or stockholders'  proxy;  provided,  however,
that an election of directors shall be by written ballot if demand is so made by
any stockholder at the meeting before voting begins. If a vote is to be taken by
written ballot, then each such ballot shall state the name of the stockholder or
proxy voting and such other  information  as the  chairman of the meeting  deems
appropriate.  Directors  shall be  elected  by a  plurality  of the votes of the
shares  present in person or represented by proxy at the meeting and entitled to
vote on the election of directors.  Unless otherwise provided by applicable law,
the Certificate of  Incorporation  or these Bylaws,  every matter other than the
election of directors shall be decided by the affirmative vote of the holders of
a majority of the shares of stock  entitled to vote  thereon that are present in
person or  represented  by proxy at the meeting and are voted for or against the
matter.

         Section 1.8:  Fixing Date for Determination of Stockholders of Record.

         (a)  Generally.  In  order  that  the  Corporation  may  determine  the
stockholders  entitled to notice of or to vote at any meeting of stockholders or
any adjournment  thereof,  or to express consent to corporate  action in writing
without a meeting,  or  entitled  to receive  payment of any  dividend  or other
distribution  or allotment of any rights,  or entitled to exercise any rights in
respect of any change, conversion or exchange of stock or for the purpose of any
other lawful action,  the Board of Directors may fix, in advance, a record date,
which  shall not precede  the date upon which the  resolution  fixing the record
date is adopted by the Board of Directors and which shall not be more than sixty
(60) nor less than ten (10) days before the date of such meeting,  nor more than
sixty (60) days  prior to any other  action.  If no record  date is fixed by the
Board of Directors, then the record date shall be as provided by applicable law.
A determination  of stockholders of record entitled to notice of or to vote at a
meeting of stockholders shall apply to any adjournment of the meeting; provided,
however, that the Board of Directors may fix a new record date for the adjourned
meeting.

         (b) Stockholder Request for Action by Written Consent.  For such period
of time as stockholders are authorized to act by written consent pursuant to the
provisions of the  Certificate  of  Incorporation  and Section 1.10 hereof,  any
stockholder  of  record  seeking  to have  the  stockholders  authorize  or take
corporate  action by written  consent without a meeting shall, by written notice
to the  Secretary  of the  Corporation,  request the Board of Directors to fix a
record date for such consent.  Such request shall include a brief description of
the action proposed to be taken. The Board of Directors  shall,  within ten (10)
days  after the date on which  such a request is  received,  adopt a  resolution
fixing the record  date.  Such record date shall not precede the date upon which
the resolution fixing the record date is adopted by the Board of Directors,  and
shall not be more than ten (10) days  after the date upon  which the  resolution
fixing the record date is adopted by the Board of  Directors.  If no record date
has been fixed by the Board of Directors  within ten (10) days after the date on
which  such a  request  is  received,  then  the  record  date  for  determining
stockholders  entitled  to consent  to  corporate  action in  writing  without a
meeting,  when no  prior  action  by the  Board  of  Directors  is  required  by
applicable  law,  shall be the  first  date on which a  signed  written  consent
setting  forth the action  taken or  proposed  to be taken is  delivered  to the
Corporation  by delivery to its registered  office in the State of Delaware,  to
its principal  place of business,  or to any officer or agent of the Corporation
having custody of the book in which  proceedings of meetings of stockholders are
recorded.  Delivery made to the Corporation's registered office shall be by hand
or by certified or registered mail, return receipt requested.  If no record date
has been  fixed by the  Board of  Directors  and  prior  action  by the Board of
Directors is required by applicable  law,  then the record date for  determining
stockholders  entitled  to consent  to  corporate  action in  writing  without a
meeting  shall be at the  close of  business  on the date on which  the Board of
Directors adopts the resolution taking such prior action.

         Section 1.9: List of Stockholders  Entitled to Vote. A complete list of
stockholders  entitled  to vote at any  meeting  of  stockholders,  arranged  in
alphabetical order and showing the address of each stockholder and the number of
shares  registered  in the  name  of  each  stockholder,  shall  be  open to the
examination of any stockholder,  for any purpose germane to the meeting,  during
ordinary  business  hours,  for a period of at least ten (10) days  prior to the
meeting,  either at a place  within  the city  where the  meeting is to be held,
which  place  shall be  specified  in the notice of the  meeting,  or, if not so
specified,  at the place where the meeting is to be held. The list shall also be
produced  and kept at the time and place of the  meeting  during  the whole time
thereof and may be inspected by any stockholder who is present at the meeting.

         Section 1.10:     Action by Written Consent of Stockholders.

         (a)  Procedure.   Unless  otherwise  provided  by  the  Certificate  of
Incorporation,  and  except as set forth in  Section  1.8(b)  above,  any action
required  or  permitted  to be taken at any  annual or  special  meeting  of the
stockholders may be taken without a meeting,  without prior notice and without a
vote,  if a consent or consents in writing,  setting  forth the action so taken,
shall be signed by the  holders of  outstanding  stock  having not less than the
number of votes that would be  necessary  to  authorize or take such action at a
meeting at which all shares  entitled to vote  thereon  were  present and voted;
provided,   however,   that  effective  immediately  after  the  closing  of  an
underwritten  public  offering  of  shares  of the  Corporation's  Common  Stock
pursuant to a registration  statement  filed with and declared  effective by the
Securities and Exchange Commission, any action required or permitted to be taken
by the Corporation's stockholders shall be taken only at a duly called annual or
special meeting of such  stockholders and the Corporation's  stockholders  shall
not be able to act by  written  consent.  For  such  period  of time as  written
stockholder  consents  are  permitted,  such  consents  shall  bear  the date of
signature  of each  stockholder  who signs the consent and shall be delivered to
the  Corporation by delivery to its registered  office in the State of Delaware,
to its principal place of business or to any officer or agent of the Corporation
having custody of the book in which  proceedings of meetings of stockholders are
recorded.  Delivery made to the Corporation's registered office shall be by hand
or by certified or registered mail, return receipt requested. No written consent
shall be effective  to take the action set forth  therein  unless,  within sixty
(60) days of the earliest  dated  consent  delivered to the  Corporation  in the
manner  provided  above,  written  consents  signed  by a  sufficient  number of
stockholders  to  take  the  action  set  forth  therein  are  delivered  to the
Corporation in the manner provided above.

         (b) Notice of Consent.  Prompt notice of the taking of corporate action
by stockholders  without a meeting by less than unanimous written consent of the
stockholders shall be given to those stockholders who have not consented thereto
in writing and, in the case of a Certificate  Action (as defined below),  if the
Delaware General  Corporation Law so requires,  such notice shall be given prior
to filing of the  certificate  in question.  If the action which is consented to
requires the filing of a certificate under the Delaware General  Corporation Law
(a  "Certificate  Action"),  then if the  Delaware  General  Corporation  Law so
requires,  the certificate so filed shall state that written stockholder consent
has  been  given  in  accordance  with  Section  228  of  the  Delaware  General
Corporation  Law and that written  notice of the taking of  corporate  action by
stockholders without a meeting as described herein has been given as provided in
such section.

         Section 1.11:     Inspectors of Elections.

         (a)  Applicability.  Unless  otherwise  provided  in the  Corporation's
Certificate of  Incorporation  or required by the Delaware  General  Corporation
Law, the following  provisions of this Section 1.11 shall apply only if and when
the  Corporation  has a class of voting  stock that is: (i) listed on a national
securities exchange;  (ii) authorized for quotation on an interdealer  quotation
system of a registered national securities association;  or (iii) held of record
by  more  than  2,000  stockholders;  in  all  other  cases,  observance  of the
provisions of this Section 1.11 shall be optional,  and at the discretion of the
Corporation.

         (b)  Appointment.  The Corporation  shall, in advance of any meeting of
stockholders,  appoint one or more  inspectors of election to act at the meeting
and make a written report  thereof.  The  Corporation  may designate one or more
persons as alternate inspectors to replace any inspector who fails to act. If no
inspector or alternate is able to act at a meeting of  stockholders,  the person
presiding  at the meeting  shall  appoint one or more  inspectors  to act at the
meeting.

         (c) Inspector's Oath. Each inspector of election,  before entering upon
the discharge of his duties,  shall take and sign an oath  faithfully to execute
the duties of inspector  with strict  impartiality  and according to the best of
his ability.

         (d) Duties of Inspectors. At a meeting of stockholders,  the inspectors
of election shall (i) ascertain the number of shares  outstanding and the voting
power of each share, (ii) determine the shares  represented at a meeting and the
validity  of  proxies  and  ballots,  (iii)  count all votes and  ballots,  (iv)
determine and retain for a reasonable period of time a record of the disposition
of any challenges made to any  determination by the inspectors,  and (v) certify
their  determination  of the number of shares  represented  at the meeting,  and
their count of all votes and ballots. The inspectors may appoint or retain other
persons or entities to assist the inspectors in the performance of the duties of
the inspectors.

         (e) Opening and Closing of Polls.  The date and time of the opening and
the closing of the polls for each matter upon which the  stockholders  will vote
at a meeting  shall be announced by the  inspectors  at the meeting.  No ballot,
proxies or votes,  nor any  revocations  thereof or  changes  thereto,  shall be
accepted by the  inspectors  after the closing of the polls  unless the Court of
Chancery upon application by a stockholder shall determine otherwise.

         (f) Determinations. In determining the validity and counting of proxies
and ballots,  the inspectors  shall be limited to an examination of the proxies,
any  envelopes  submitted  with  those  proxies,  any  information  provided  in
connection  with proxies in  accordance  with Section  212(c)(2) of the Delaware
General  Corporation  Law,  ballots  and the  regular  books and  records of the
Corporation,  except that the inspectors may consider other reliable information
for the limited  purpose of reconciling  proxies and ballots  submitted by or on
behalf of banks, brokers, their nominees or similar persons which represent more
votes than the holder of a proxy is  authorized  by the record  owner to cast or
more votes than the  stockholder  holds of record.  If the  inspectors  consider
other  reliable  information  for the  limited  purpose  permitted  herein,  the
inspectors  at the time they make their  certification  of their  determinations
pursuant to this Section 1.11 shall specify the precise  information  considered
by  them,   including  the  person  or  persons  from  whom  they  obtained  the
information,  when  the  information  was  obtained,  the  means  by  which  the
information  was  obtained  and the basis for the  inspectors'  belief that such
information is accurate and reliable.

         Section 1.12:     Notice of Stockholder Business; Nominations.

         (a)      Annual Meeting of Stockholders.

                  (i)  Nominations  of  persons  for  election  to the  Board of
Directors  and the  proposal of business to be  considered  by the  stockholders
shall  be  made  at an  annual  meeting  of  stockholders  (A)  pursuant  to the
Corporation's notice of such meeting, (B) by or at the direction of the Board of
Directors or (C) by any  stockholder of the Corporation who was a stockholder of
record at the time of giving of the notice  provided for in this  Section  1.12,
who is  entitled  to vote at such  meeting  and who  complies  with  the  notice
procedures set forth in this Section 1.12.

                  (ii) For nominations or other business to be properly  brought
before an annual meeting by a stockholder pursuant to clause (C) of subparagraph
(a)(i) of this Section  1.12,  the  stockholder  must have given  timely  notice
thereof in writing to the Secretary of the  Corporation  and such other business
must  otherwise  be a proper  matter for  stockholder  action.  To be timely,  a
stockholder's  notice  must  be  delivered  to the  Secretary  at the  principal
executive offices of the Corporation not later than the close of business on the
sixtieth  (60th) day nor earlier  than the close of  business  on the  ninetieth
(90th) day prior to the first anniversary of the preceding year's annual meeting
(except in the case of the 1995 annual  meeting,  for which such notice shall be
timely if  delivered  in the same time period as if such  meeting were a special
meeting governed by subparagraph (b) of this Section 1.12);  provided,  however,
that in the event that the date of the annual  meeting is more than  thirty (30)
days before or more than sixty (60) days after such anniversary  date, notice by
the  stockholder to be timely must be so delivered not earlier than the close of
business on the ninetieth  (90th) day prior to such annual meeting and not later
than the close of business on the later of the sixtieth (60th) day prior to such
annual  meeting or the close of business on the tenth (10th) day  following  the
day on which  public  announcement  of the date of such meeting is first made by
the  Corporation.  Such  stockholder's  notice  shall set forth:  (a) as to each
person whom the stockholder proposes to nominate for election or reelection as a
director  all  information  relating  to  such  person  that is  required  to be
disclosed in solicitations of proxies for election of directors, or is otherwise
required,  in each case pursuant to Regulation 14A under the Securities Exchange
Act of 1934, as amended (the "Exchange  Act"),  including such person's  written
consent to being named in the proxy  statement  as a nominee and to serving as a
director if elected;  (b) as to any other business that the stockholder proposes
to bring before the meeting,  a brief  description of the business desired to be
brought  before the meeting,  the reasons for  conducting  such  business at the
meeting and any material  interest in such business of such  stockholder and the
beneficial  owner,  if any, on whose behalf the proposal is made;  and (c) as to
the  stockholder  giving the notice and the beneficial  owner,  if any, on whose
behalf  the  nomination  or  proposal  is made (1) the name and  address of such
stockholder,  as they appear on the Corporation's  books, and of such beneficial
owner,  and (2) the class and number of shares of the Corporation that are owned
beneficially and held of record by such stockholder and such beneficial owner.

                  (iii)  Notwithstanding  anything  in the  second  sentence  of
subparagraph (a)(ii) of this Section 1.12 to the contrary, in the event that the
number of directors  to be elected to the Board of Directors of the  Corporation
is increased and there is no public  announcement by the Corporation  naming all
of the nominees for director or specifying  the size of the  increased  board of
directors  at least  seventy  (70) days  prior to the first  anniversary  of the
preceding  year's  annual  meeting (or, if the annual  meeting is held more than
thirty (30) days before or sixty (60) days after such anniversary date, at least
seventy (70) days prior to such annual meeting), a stockholder's notice required
by this Section 1.12 shall also be considered  timely,  but only with respect to
nominees  for  any new  positions  created  by such  increase,  if it  shall  be
delivered to the Secretary of the Corporation at the principal  executive office
of the  Corporation not later than the close of business on the tenth (10th) day
following  the day on  which  such  public  announcement  is  first  made by the
Corporation.

         (b)  Special  Meetings of  Stockholders.  Only such  business  shall be
conducted at a special meeting of stockholders as shall have been brought before
the meeting pursuant to the Corporation's notice of such meeting. Nominations of
persons for election to the Board of Directors may be made at a special  meeting
of  stockholders  at  which  directors  are  to  be  elected   pursuant  to  the
Corporation's  notice of such meeting (i) by or at the direction of the Board of
Directors or (ii)  provided  that the Board of  Directors  has  determined  that
directors  shall  be  elected  at  such  meeting,  by  any  stockholder  of  the
Corporation  who is a  stockholder  of record at the time of giving of notice of
the  special  meeting,  who shall be  entitled  to vote at the  meeting  and who
complies with the notice procedures set forth in this Section 1.12. In the event
the  Corporation  calls a special  meeting of  stockholders  for the  purpose of
electing one or more directors to the Board of Directors,  any such  stockholder
may  nominate a person or persons  (as the case may be),  for  election  to such
position(s)  as  specified  in  the  Corporation's  notice  of  meeting,  if the
stockholder's notice required by subparagraph (a)(ii) of this Section 1.12 shall
be delivered to the  Secretary of the  Corporation  at the  principal  executive
offices of the  Corporation  not earlier than the ninetieth  (90th) day prior to
such  special  meeting  and not later than the close of business on the later of
the sixtieth  (60th) day prior to such  special  meeting or the tenth (10th) day
following the day on which public  announcement is first made of the date of the
special  meeting and of the  nominees  proposed by the Board of  Directors to be
elected at such meeting.

         (c)      General.

                  (i) Only such persons who are nominated in accordance with the
procedures  set  forth  in this  Section  1.12  shall  be  eligible  to serve as
directors and only such business shall be conducted at a meeting of stockholders
as shall have been brought before the meeting in accordance  with the procedures
set forth in this Section  1.12.  Except as  otherwise  provided by law or these
bylaws,  the chairman of the meeting  shall have the power and duty to determine
whether a nomination or any business  proposed to be brought  before the meeting
was made or proposed,  as the case may be, in accordance with the procedures set
forth in this Section 1.12 and, if any proposed nomination or business is not in
compliance herewith, to declare that such defective proposal or nomination shall
be disregarded.

                  (ii) For  purposes  of this  Section  1.12,  the term  "public
announcement" shall mean disclosure in a press release reported by the Dow Jones
News  Service,  Associated  Press or  comparable  national  news service or in a
document  publicly  filed by the  Corporation  with the  Securities and Exchange
Commission pursuant to section 13, 14 or 15(d) of the Exchange Act.

                  (iii) Notwithstanding the foregoing provisions of this Section
1.12, a stockholder  shall also comply with all applicable  requirements  of the
Exchange  Act and the rules  and  regulations  thereunder  with  respect  to the
matters set forth herein. Nothing in this Section 1.12 shall be deemed to affect
any  rights  of   stockholders   to  request   inclusion  of  proposals  in  the
Corporation's proxy statement pursuant to Rule 14a-8 under the Exchange Act.


                                   ARTICLE II

                               BOARD OF DIRECTORS

         Section  2.1:  Number;  Qualifications.  The Board of  Directors  shall
consist of one or more  members.  The initial  number of directors  shall be six
(6), and thereafter  shall be fixed from time to time by resolution of the Board
of Directors. No decrease in the authorized number of directors constituting the
Board of Directors shall shorten the term of any incumbent  director.  Directors
need not be stockholders of the Corporation.

         Section 2.2: Election;  Resignation;  Removal;  Vacancies. The Board of
Directors  shall  initially  consist  of the  person or  persons  elected by the
incorporator or named in the Corporation's initial Certificate of Incorporation.
Each director  shall hold office until the next annual  meeting of  stockholders
and until his or her  successor  is elected and  qualified,  or until his or her
earlier death,  resignation or removal. Any director may resign at any time upon
written  notice to the  Corporation.  Subject  to the  rights of any  holders of
Preferred  Stock then  outstanding:  (i) any  director  or the  entire  Board of
Directors may be removed, with or without cause, by the holders of a majority of
the shares  then  entitled  to vote at an  election  of  directors  and (ii) any
vacancy occurring in the Board of Directors for any cause, and any newly created
directorship  resulting from any increase in the authorized  number of directors
to be elected by all  stockholders  having the right to vote as a single  class,
shall  be  filled  only by a  majority  vote of the  directors  then in  office,
although less than a quorum, or by a sole remaining  director,  and any director
so chosen  shall hold office for a term  expiring at the next annual  meeting of
stockholders and until his or her successor is duly elected and qualified.

         Section  2.3:  Regular  Meetings.  Regular  meetings  of the  Board  of
Directors  may be held at such places,  within or without the State of Delaware,
and at such  times as the Board of  Directors  may from time to time  determine.
Notice  of  regular  meetings  need not be given if the date,  times and  places
thereof are fixed by resolution of the Board of Directors.

         Section  2.4:  Special  Meetings.  Special  meetings  of the  Board  of
Directors  may be called  by the  Chairman  of the  Board,  the Chief  Executive
Officer or a majority  of the members of the Board of  Directors  then in office
and may be held at any time,  date or  place,  within  or  without  the State of
Delaware,  as the person or persons calling the meeting shall fix. Notice of the
time,  date and place of such meeting shall be given,  orally or in writing,  by
the person or persons  calling the meeting to all  directors  at least  fourteen
(14) days before the meeting if the notice is mailed (which notice shall be sent
by express courier for overseas delivery), or at least seven (7) days before the
meeting if such notice is given by telephone,  hand delivery,  telegram,  telex,
mailgram,  facsimile  or similar  communication  method.  Any oral notice  given
personally  or by telephone may be  communicated  either to the director or to a
person at the home or office of the  director  who the person  giving the notice
has reason to believe  will  promptly  communicate  it to the  director.  Unless
otherwise  indicated in the notice,  any and all business may be transacted at a
special meeting.

         Section 2.5:  Telephonic  Meetings  Permitted.  Members of the Board of
Directors,  or any committee of the Board,  may  participate in a meeting of the
Board  or  such   committee  by  means  of   conference   telephone  or  similar
communications  equipment  by means of which all  persons  participating  in the
meeting  can hear  each  other,  and  participation  in a  meeting  pursuant  to
conference  telephone  or  similar  communications  equipment  shall  constitute
presence in person at such meeting.

         Section 2.6: Quorum;  Vote Required for Action.  At all meetings of the
Board of Directors a majority of the total number of authorized  directors shall
constitute  a quorum  for the  transaction  of  business.  Except  as  otherwise
provided herein or in the Certificate of Incorporation,  or required by law, the
vote of a majority  of the  directors  present at a meeting at which a quorum is
present shall be the act of the Board of Directors.

         Section 2.7: Organization.  Meetings of the Board of Directors shall be
presided  over by the  Chairman  of the Board,  or in his or her  absence by the
Chief  Executive  Officer,  or in his or her absence by a chairman chosen at the
meeting.  The Secretary shall act as secretary of the meeting, but in his or her
absence the  chairman of the meeting may appoint any person to act as  secretary
of the meeting.

         Section  2.8:  Written  Action by  Directors.  Any action  required  or
permitted  to be taken at any  meeting  of the  Board  of  Directors,  or of any
committee thereof, may be taken without a meeting if all members of the Board or
such committee,  as the case may be, consent thereto in writing, and the writing
or writings are filed with the minutes of proceedings of the Board or committee,
respectively.

     Section  2.9:  Powers.  The Board of  Directors  may,  except as  otherwise
required by law or the  Certificate of  Incorporation,  exercise all such powers
and do all such acts and things as may be exercised or done by the Corporation.

     Section 2.10:  Compensation of Directors.  Directors, as such, may receive,
pursuant to a resolution of the Board of Directors,  fees and other compensation
for their services as directors,  including without limitation their services as
members of committees of the Board of Directors.


                                   ARTICLE III

                                   COMMITTEES

         Section  3.1:  Committees.  The Board of Directors  may, by  resolution
passed by a majority of the whole Board, designate one or more committees,  each
committee  to consist of one or more of the  directors of the  Corporation.  The
Board of Directors may designate one or more  directors as alternate  members of
any committee,  who may replace any absent or disqualified member at any meeting
of  the  committee.  In the  absence  or  disqualification  of a  member  of the
committee,  the  member  or  members  thereof  present  at any  meeting  of such
committee who are not disqualified  from voting,  whether or not he, she or they
constitute a quorum,  may  unanimously  appoint  another  member of the Board of
Directors  to act at the  meeting  in place of any such  absent or  disqualified
member. Any such committee,  to the extent provided in a resolution of the Board
of  Directors,  shall have and may exercise all the powers and  authority of the
Board  of  Directors  in the  management  of the  business  and  affairs  of the
Corporation  and may authorize the seal of the  Corporation to be affixed to all
papers  that may  require  it;  but no such  committee  shall  have the power or
authority in reference to amending the Certificate of Incorporation (except that
a committee  may, to the extent  authorized  in the  resolution  or  resolutions
providing  for the issuance of shares of stock adopted by the Board of Directors
as provided in subsection (a) of Section 151 of the Delaware General Corporation
Law, fix the  designations  and any of the  preferences or rights of such shares
relating to dividends,  redemption,  dissolution,  any distribution of assets of
the  Corporation,  or the  conversion  into, or the exchange of such shares for,
shares  of any other  class or  classes  or any other  series of the same or any
other class or classes of stock of the Corporation,  or fix the number of shares
of any series of stock or  authorize  the  increase or decrease of the shares of
any series), adopting an agreement of merger or consolidation under Sections 251
or 252 of the Delaware General Corporation Law, recommending to the stockholders
the sale,  lease or exchange of all or  substantially  all of the  Corporation's
property and assets,  recommending  to the  stockholders  a  dissolution  of the
Corporation  or a  revocation  of a  dissolution,  or amending the Bylaws of the
Corporation;  and unless the  resolution of the Board of Directors  expressly so
provides,  no such  committee  shall  have the power or  authority  to declare a
dividend,  authorize the issuance of stock or adopt a  certificate  of ownership
and merger pursuant to section 253 of the Delaware General Corporation Law.

         Section 3.2: Committee Rules.  Unless the Board of Directors  otherwise
provides,  each  committee  designated  by the Board may make,  alter and repeal
rules for the  conduct  of its  business.  In the  absence  of such  rules  each
committee  shall  conduct  its  business  in the  same  manner  as the  Board of
Directors conducts its business pursuant to Article II of these Bylaws.


                                   ARTICLE IV

                                    OFFICERS

         Section 4.1:  Generally.  The officers of the Corporation shall consist
of a Chief Executive Officer and/or a President,  one or more Vice Presidents, a
Secretary,  a Chief  Financial  Officer  and such other  officers,  including  a
Chairman of the Board of Directors and/or Treasurer, as may from time to time be
appointed by the Board of Directors.  All officers shall be elected by the Board
of  Directors;  provided,  however,  that the Board of Directors may empower the
Chief Executive  Officer of the  Corporation to appoint  officers other than the
Chairman of the Board,  the Chief Executive  Officer,  the President,  the Chief
Financial Officer or the Treasurer.  Each officer shall hold office until his or
her successor is elected and  qualified or until his or her earlier  resignation
or removal.  Any number of offices may be held by the same  person.  Any officer
may  resign at any time upon  written  notice to the  Corporation.  Any  vacancy
occurring in any office of the  Corporation  by death,  resignation,  removal or
otherwise may be filled by the Board of Directors.

         Section 4.2:  Chief  Executive  Officer.  Subject to the control of the
Board of Directors and such supervisory  powers,  if any, as may be given by the
Board of Directors,  the powers and duties of the Chief Executive Officer of the
Corporation are:

         (a) To act as the general  manager  and,  subject to the control of the
Board of Directors,  to have general  supervision,  direction and control of the
business and affairs of the Corporation;

         (b)      To preside at all meetings of the stockholders;

         (c) To call meetings of the  stockholders to be held at such times and,
subject to the limitations  prescribed by law or by these Bylaws, at such places
as he or she shall deem proper; and

         (d)  To  affix  the  signature  of  the   Corporation   to  all  deeds,
conveyances, mortgages, guarantees, leases, obligations, bonds, certificates and
other papers and  instruments in writing which have been authorized by the Board
of Directors or which, in the judgment of the Chief Executive Officer, should be
executed on behalf of the Corporation;  to sign certificates for shares of stock
of the Corporation;  and, subject to the direction of the Board of Directors, to
have general  charge of the  property of the  Corporation  and to supervise  and
control all officers, agents and employees of the Corporation.

The President shall be the Chief Executive Officer of the Corporation unless the
Board of Directors  shall  designate  another  officer to be the Chief Executive
Officer. If there is no President, and the Board of Directors has not designated
any other officer to be the Chief  Executive  Officer,  then the Chairman of the
Board shall be the Chief Executive Officer.

         Section  4.3:  Chairman of the Board.  The  Chairman of the Board shall
have the power to preside at all  meetings of the Board of  Directors  and shall
have such other  powers and duties as provided in these  bylaws and as the Board
of Directors may from time to time prescribe.

         Section 4.4:  President.  The  President  shall be the Chief  Executive
Officer of the  Corporation  unless the Board of Directors shall have designated
another officer as the Chief Executive  Officer of the  Corporation.  Subject to
the  provisions  of these Bylaws and to the direction of the Board of Directors,
and subject to the  supervisory  powers of the Chief  Executive  Officer (if the
Chief Executive Officer is an officer other than the President),  and subject to
such supervisory  powers and authority as may be given by the Board of Directors
to the Chairman of the Board and/or to any other  officer,  the President  shall
have the  responsibility  for the general management the control of the business
and affairs of the Corporation and the general  supervision and direction of all
of the officers,  employees and agents of the Corporation  (other than the Chief
Executive  Officer,  if the Chief Executive Officer is an officer other than the
President)  and shall  perform all duties and have all powers that are  commonly
incident to the office of  President or that are  delegated to the  President by
the Board of Directors.

         Section 4.5: Vice  President.  Each Vice President  shall have all such
powers and duties as are commonly  incident to the office of Vice President,  or
that  are  delegated  to  him or her by the  Board  of  Directors  or the  Chief
Executive  Officer.  A Vice  President may be designated by the Board to perform
the duties and exercise the powers of the Chief  Executive  Officer in the event
of the Chief Executive Officer's absence or disability.

         Section 4.6: Chief Financial  Officer.  Subject to the direction of the
Board of Directors and the President,  the Chief Financial Officer shall perform
all duties and have all powers that are commonly incident to the office of chief
financial officer.

         Section 4.7: Treasurer.  The Treasurer shall have custody of all monies
and securities of the Corporation.  The Treasurer shall make such  disbursements
of the funds of the  Corporation as are authorized and shall render from time to
time an account of all such transactions.  The Treasurer shall also perform such
other duties and have such other  powers as are commonly  incident to the office
of  Treasurer,  or as the Board of Directors or the  President  may from time to
time prescribe.

         Section 4.8: Secretary. The Secretary shall issue or cause to be issued
all authorized  notices for, and shall keep, or cause to be kept, minutes of all
meetings of the  stockholders  and the Board of Directors.  The Secretary  shall
have charge of the corporate  minute books and similar records and shall perform
such other  duties and have such other  powers as are  commonly  incident to the
office of Secretary, or as the Board of Directors or the President may from time
to time prescribe.

         Section 4.9:  Delegation of Authority.  The Board of Directors may from
time to time delegate the powers or duties of any officer to any other  officers
or agents, notwithstanding any provision hereof.

         Section 4.10:  Removal.  Any officer of the Corporation  shall serve at
the pleasure of the Board of Directors  and may be removed at any time,  with or
without  cause,  by the  Board of  Directors.  Such  removal  shall  be  without
prejudice  to  the  contractual  rights  of  such  officer,  if  any,  with  the
Corporation.


                                    ARTICLE V

                                      STOCK

         Section 5.1:  Certificates.  Every holder of stock shall be entitled to
have a certificate  signed by or in the name of the  Corporation by the Chairman
or  Vice-Chairman  of  the  Board  of  Directors,  or  the  President  or a Vice
President,  and by the Treasurer or an Assistant Treasurer,  or the Secretary or
an Assistant  Secretary,  of the  Corporation,  certifying  the number of shares
owned by such  stockholder in the  Corporation.  Any or all of the signatures on
the certificate may be a facsimile.

         Section 5.2: Lost, Stolen or Destroyed Stock Certificates;  Issuance of
New  Certificates.  The  Corporation may issue a new certificate of stock in the
place of any  certificate  previously  issued by it,  alleged to have been lost,
stolen or  destroyed,  and the  Corporation  may  require the owner of the lost,
stolen or destroyed certificate, or such owner's legal representative,  to agree
to indemnify the Corporation and/or to give the Corporation a bond sufficient to
indemnify  it,  against any claim that may be made  against it on account of the
alleged loss,  theft or destruction  of any such  certificate or the issuance of
such new certificate.

         Section 5.3: Other  Regulations.  The issue,  transfer,  conversion and
registration of stock  certificates  shall be governed by such other regulations
as the Board of Directors may establish.


                                   ARTICLE VI

                                 INDEMNIFICATION

         Section 6.1 Indemnification of Officers and Directors.  Each person who
was or is made a party  to,  or is  threatened  to be  made a  party  to,  or is
involved  in  any  action,   suit  or  proceeding,   whether  civil,   criminal,
administrative or investigative (a "proceeding"),  by reason of the fact that he
or she (or a person of whom he or she is the legal representative),  is or was a
director or officer of the Corporation or a Predecessor (as defined below) or is
or was serving at the request of the  Corporation  or a Predecessor  (as defined
below) as a director  or officer of another  corporation,  or of a  partnership,
joint  venture,  trust or other  enterprise,  including  service with respect to
employee  benefit  plans,   shall  be  indemnified  and  held  harmless  by  the
Corporation to the fullest extent permitted by the Delaware General  Corporation
Law,  against all  expenses,  liability  and loss  (including  attorneys'  fees,
judgments,  fines,  ERISA excise taxes and  penalties  and amounts paid or to be
paid in settlement) reasonably incurred or suffered by such person in connection
therewith, and such indemnification shall continue as to a person who has ceased
to be a director  or officer and shall inure to the benefit of his or her heirs,
executors and  administrators;  provided,  however,  that the Corporation  shall
indemnify any such person seeking  indemnity in connection with a proceeding (or
part thereof) initiated by such person only if such proceeding (or part thereof)
was authorized by the Board of Directors of the Corporation;  provided, further,
that the  Corporation  shall not be required  to  indemnify a person for amounts
paid in settlement of a proceeding unless the Corporation consents in advance in
writing to such  settlement.  As used  herein,  the term  "Predecessor"  means a
foreign or  domestic  corporation  which was a  predecessor  corporation  of the
Corporation including,  without limitation,  Premisys  Communications  Holdings,
Inc., a California  corporation,  and Premisys Communications Inc., a California
corporation.

         Section  6.2:  Advance  of  Expenses.  The  Corporation  shall  pay all
expenses  (including  attorneys' fees) incurred by such a director or officer in
defending  any such  proceeding  as they are  incurred  in  advance of its final
disposition;  provided,  however,  that if the Delaware General  Corporation Law
then so requires,  the payment of such  expenses  incurred by such a director or
officer in advance of the final  disposition  of such  proceeding  shall be made
only upon delivery to the Corporation of an undertaking, by or on behalf of such
director or officer, to repay all amounts so advanced if it should be determined
ultimately that such director or officer is not entitled to be indemnified under
this Article VI or otherwise; and provided,  further, that the Corporation shall
not be required to advance any expenses to a person against whom the Corporation
directly brings a claim, in a proceeding, alleging that such person has breached
his or her duty of loyalty to the Corporation,  committed an act or omission not
in good faith or that involves intentional  misconduct or a knowing violation of
law, or derived an improper personal benefit from a transaction.

         Section 6.3:  Non-Exclusivity  of Rights.  The rights  conferred on any
person in this  Article VI shall not be  exclusive  of any other right that such
person  may have or  hereafter  acquire  under  any  statute,  provision  of the
Certificate of Incorporation,  Bylaw, agreement, vote or consent of stockholders
or disinterested directors, or otherwise.  Additionally, nothing in this Article
VI shall limit the ability of the Corporation,  in its discretion,  to indemnify
or  advance  expenses  to  persons  whom the  Corporation  is not  obligated  to
indemnify or advance expenses pursuant to this Article VI.

         Section  6.4:  Indemnification  Contracts.  The Board of  Directors  is
authorized to cause the Corporation to enter into indemnification contracts with
any  director,  officer,  employee  or agent of the  Corporation,  or any person
serving at the request of the  Corporation as a director,  officer,  employee or
agent  of  another  corporation,  partnership,  joint  venture,  trust  or other
enterprise,  including employee benefit plans, providing  indemnification rights
to such person.  Such rights may be greater than those  provided in this Article
VI.

         Section 6.5: Effect of Amendment. Any amendment, repeal or modification
of any  provision of this Article VI shall be  prospective  only,  and shall not
adversely affect any right or protection  conferred on a person pursuant to this
Article VI and existing at the time of such amendment, repeal or modification.


                                   ARTICLE VII

                                     NOTICES

         Section 7.1: Notice.  Except as otherwise  specifically provided herein
or required by law,  all notices  required to be given  pursuant to these Bylaws
shall be in  writing  and may in every  instance  be  effectively  given by hand
delivery (including use of a delivery service), by depositing such notice in the
mail,  postage prepaid,  or by sending such notice by prepaid  telegram,  telex,
overnight  express  courier,  mailgram or  facsimile.  Any such notice  shall be
addressed to the person to whom notice is to be given at such  person's  address
as it appears  on the  records of the  Corporation.  The notice  shall be deemed
given (i) in the case of hand  delivery,  when  received  by the  person to whom
notice is to be given or by any person  accepting  such notice on behalf of such
person, (ii) in the case of delivery by mail, upon deposit in the mail, (iii) in
the case of delivery by overnight  express  courier,  on the first  business day
after such notice is dispatched,  and (iv) in the case of delivery via telegram,
telex, mailgram, or facsimile, when dispatched.

         Section 7.2: Waiver of Notice.  Whenever notice is required to be given
under any provision of these bylaws,  a written waiver of notice,  signed by the
person  entitled to notice,  whether  before or after the time  stated  therein,
shall be deemed equivalent to notice.  Attendance of a person at a meeting shall
constitute a waiver of notice of such meeting,  except when the person attends a
meeting for the express  purpose of objecting at the beginning of the meeting to
the  transaction of any business  because the meeting is not lawfully  called or
convened.  Neither  the  business to be  transacted  at, nor the purpose of, any
regular  or  special  meeting  of the  stockholders,  directors  or members of a
committee of directors need be specified in any written waiver of notice.


                                  ARTICLE VIII

                              INTERESTED DIRECTORS

         Section 8.1: Interested  Directors;  Quorum. No contract or transaction
between the Corporation and one or more of its directors or officers, or between
the Corporation  and any other  corporation,  partnership,  association or other
organization  in which one or more of its directors or officers are directors or
officers,  or have a financial  interest,  shall be void or voidable  solely for
this  reason,  or solely  because  the  director  or  officer  is  present at or
participates  in the meeting of the Board or committee  thereof that  authorizes
the  contract or  transaction,  or solely  because  his,  her or their votes are
counted for such  purpose,  if: (i) the  material  facts as to his, her or their
relationship  or interest and as to the contract or transaction are disclosed or
are known to the Board of Directors or the committee, and the Board or committee
in good faith authorizes the contract or transaction by the affirmative votes of
a  majority  of the  disinterested  directors,  even  though  the  disinterested
directors be less than a quorum; (ii) the material facts as to his, her or their
relationship  or interest and as to the contract or transaction are disclosed or
are known to the  stockholders  entitled to vote  thereon,  and the  contract or
transaction is specifically  approved in good faith by vote of the stockholders;
or (iii) the contract or  transaction  is fair as to the  Corporation  as of the
time it is  authorized,  approved  or  ratified  by the  Board of  Directors,  a
committee thereof,  or the stockholders.  Common or interested  directors may be
counted in  determining  the  presence  of a quorum at a meeting of the Board of
Directors or of a committee which authorizes the contract or transaction.


                                   ARTICLE IX

                                  MISCELLANEOUS

     Section  9.1:  Fiscal  Year.  The fiscal year of the  Corporation  shall be
determined by resolution of the Board of Directors.

     Section 9.2: Seal. The Board of Directors may provide for a corporate seal,
which  shall  have the  name of the  Corporation  inscribed  thereon  and  shall
otherwise  be in such form as may be approved  from time to time by the Board of
Directors.

         Section 9.3: Form of Records. Any records maintained by the Corporation
in the regular  course of its business,  including  its stock  ledger,  books of
account and minute books,  may be kept on, or be in the form of,  magnetic tape,
diskettes,  photographs,  microphotographs  or  any  other  information  storage
device,  provided that the records so kept can be converted into clearly legible
form within a reasonable  time. The Corporation  shall so convert any records so
kept upon the request of any person entitled to inspect the same.

         Section 9.4: Reliance Upon Books and Records.  A member of the Board of
Directors,  or a member of any  committee  designated  by the Board of Directors
shall, in the performance of his or her duties, be fully protected in relying in
good faith upon records of the Corporation and upon such information,  opinions,
reports or statements  presented to the Corporation by any of the  Corporation's
officers or employees,  or committees of the Board of Directors, or by any other
person as to  matters  the member  reasonably  believes  are  within  such other
person's  professional  or  expert  competence  and who has been  selected  with
reasonable care by or on behalf of the Corporation.

         Section 9.5: Certificate of Incorporation  Governs. In the event of any
conflict   between  the   provisions  of  the   Corporation's   Certificate   of
Incorporation  and Bylaws,  the provisions of the  Certificate of  Incorporation
shall govern.

         Section 9.6:  Severability.  If any  provision of these Bylaws shall be
held to be invalid, illegal, unenforceable or in conflict with the provisions of
the  Corporation's  Certificate  of  Incorporation,  then such  provision  shall
nonetheless  be enforced to the maximum  extent  possible  consistent  with such
holding  and  the  remaining  provisions  of  these  Bylaws  (including  without
limitation,  all  portions of any section of these  Bylaws  containing  any such
provision  held to be invalid,  illegal,  unenforceable  or in conflict with the
Certificate  of  Incorporation,   that  are  not  themselves  invalid,  illegal,
unenforceable or in conflict with the Certificate of Incorporation) shall remain
in full force and effect.


                                    ARTICLE X

                                    AMENDMENT

         Section 10.1:  Amendments.  Stockholders of the  Corporation  holding a
majority of the Corporation's  outstanding  voting stock shall have the power to
adopt,  amend or repeal  Bylaws.  To the extent  provided  in the  Corporation's
Certificate of  Incorporation,  the Board of Directors of the Corporation  shall
also have the power to adopt, amend or repeal Bylaws of the Corporation,  except
insofar as Bylaws adopted by the stockholders shall otherwise provide.








<PAGE>


                                                                    Exhibit 4.04











                          PREMISYS COMMUNICATIONS, INC.

                                       AND

                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                  RIGHTS AGENT


                                RIGHTS AGREEMENT

                         DATED AS OF SEPTEMBER 18, 1998








<PAGE>





                                TABLE OF CONTENTS

                                                                            Page

Section 1. Certain Definitions                                                 1

Section 2. Appointment of Rights Agent                                         4

Section 3. Issue of Right Certificates                                         4

Section 4. Form of Right Certificates                                          6

Section 5. Countersignature and Registration                                   6

Section 6. Transfer, Split Up, Combination and Exchange of Right
           Certificates; Mutilated, Destroyed, Lost or Stolen Right
           Certificates                                                        7

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

Section 8. Cancellation and Destruction of Right Certificates                  8

Section 9. Status and Availability of Preferred Shares                         9

Section 10.Preferred Shares Record Date                                        9

Section 11.Adjustment of Purchase Price, Number of Shares or
           Number of Rights                                                    9

Section 12.Certificate of Adjusted Purchase Price
           or Number of Shares                                                16

Section 13.Consolidation, Merger or Sale or Transfer of Assets
           or Earning Power                                                   16

Section 14.Fractional Rights and Fractional Shares                            17

Section 15.Rights of Action                                                   18

Section 16.Agreement of Right Holders                                         18

Section 17.Right Certificate Holder Not Deemed a Stockholder                  19

Section 18.Compensation and Indemnity of the Rights Agent                     19

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

Section 20.Rights and Duties of Rights Agent                                  20

Section 21.Change of Rights Agent                                             22

Section 22.Issuance of New Right Certificates                                 22

Section 23.Redemption                                                         23

Section 24.Exchange                                                           23

Section 25.Notice of Certain Events                                           25

Section 26.Notices                                                            25

Section 27.Supplements and Amendments                                         26

Section 28.Successors                                                         26

Section 29.Benefits of this Agreement                                         26

Section 30.Severability                                                       27

Section 31.Governing Law                                                      27

Section 32.Counterparts                                                       27

Section 33.Descriptive Headings                                               27

Section 34.Entire Agreement                                                   27

Signatures                                                                    28

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

Exhibit B -       Form of Right Certificate

Exhibit C -       Summary of Rights to Purchase Preferred Shares



<PAGE>





                                RIGHTS AGREEMENT


         Agreement, dated as of September 18, 1998, between Premisys 
Communications,Inc.,  a Delaware  corporation  (the  "Company"),  and
ChaseMellon  Shareholder Services, L.L.C. (the "Rights Agent").

         The Board of  Directors  of the Company has  authorized  and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as hereinafter defined) of the Company outstanding at the Close of Business (as
hereinafter  defined)  on October  5,  1998,  (the  "Record  Date"),  each Right
representing  the right to purchase one  one-hundredth  of a Preferred Share (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  Common  Share that shall  become  outstanding  (i)  between the
Record Date and the earliest of the  Distribution  Date, the Redemption Date and
the Final  Expiration  Date (as such  terms  are  hereinafter  defined)  or (ii)
following  the  Distribution  Date  and  prior to the  Redemption  Date or Final
Expiration Date, pursuant to the exercise of stock options or under any employee
plan or  arrangement  or upon the  exercise,  conversion  or  exchange  of other
securities of the Company, which options or securities were outstanding prior to
the Distribution Date.

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereto 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 who or which,  together with
all Affiliates and Associates of such Person,  shall be the Beneficial  Owner of
20% (the  "Designated  Percentage")  or more of the Common Shares of the Company
then outstanding,  but shall not include (i) the Company, (ii) any Subsidiary of
the Company, (iii) any employee benefit plan of the Company or any Subsidiary of
the  Company or (iv) any entity  holding  Common  Shares for or  pursuant to the
terms of any such plan. Notwithstanding the foregoing,

     (A) No Person shall become an Acquiring Person if the Board of Directors of
the Company  determines  in good faith that a Person who would  otherwise  be an
Acquiring Person has become such  inadvertently,  and such Person as promptly as
practicable  takes such actions as may be necessary so that such Person would no
longer be considered an Acquiring Person.

     (B) No  Person  shall  become an  "Acquiring  Person"  as the  result of an
acquisition  of Common  Shares by the Company  which,  by reducing the number of
shares  outstanding,  increases the proportionate  number of shares beneficially
owned  by such  Person  and  such  Person's  Affiliates  and  Associates  to the
Designated  Percentage  or  more  of  the  Common  Shares  of the  Company  then
outstanding;  provided,  however, that if a Person,  together with such Person's
Affiliates and Associates,  shall become the Beneficial  Owner of the Designated
Percentage  or more of the Common  Shares of the  Company  then  outstanding  by
reason of share  purchases  by the Company and such  Person,  together  with its
Affiliates  and  Associates,  shall,  after  public  announcement  of such share
purchases by the Company,  become the Beneficial Owner of any additional  Common
Shares of the  Company,  then such  Person  shall be deemed to be an  "Acquiring
Person."
     (b)      "Affiliate" and "Associate" shall have the following meanings:

     (i) An "Affiliate" of, or a Person  "affiliated"  with, a specified Person,
is a Person that  directly,  or indirectly  through one or more  intermediaries,
controls,  or is  controlled  by, or is under common  control  with,  the Person
specified.  For this  purpose,  "control"  (including  the terms  "controlling,"
"controlled by" and "under common control with") means the possession, direct or
indirect,  of the power to direct or cause the direction of the  management  and
policies of a Person,  whether  through the ownership of voting  securities,  by
contract or otherwise;

     (ii) The term "Associate"  used to indicate a relationship  with any Person
shall mean (A) any  corporation  or  organization  (other  than the Company or a
majority-owned  subsidiary of the Company) of which such Person is an officer or
partner or is,  directly or indirectly,  the Beneficial  Owner of 10% or more of
any class of equity  securities,  (B) any  trust or other  estate in which  such
Person has a substantial  beneficial  interest or as to which such Person serves
as trustee or in a similar fiduciary capacity, and (C) any relative or spouse of
such  Person,  or any  relative  of such  spouse,  who has the same home as such
Person or who is a director  or officer of the  Company or any of its parents or
Subsidiaries.

     (c) A Person  shall be deemed  the  "Beneficial  Owner" of and shall be
 deemed to "beneficially own" any securities:
     (i)      which such Person owns, directly or indirectly;

     (ii) which  such  Person 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  (other than customary  agreements with
and between  underwriters  and selling group members with respect to a bona fide
public  offering of securities),  written or otherwise,  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 to
be 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  until such
tendered  securities are accepted for purchase or exchange;  or (B) the right to
vote pursuant to any agreement, arrangement or understanding; provided, however,
that a Person shall not be deemed the  Beneficial  Owner of, or to  beneficially
own, any security if the agreement,  arrangement or  understanding  to vote such
security  (1) arises  solely  from a  revocable  proxy or consent  given to such
Person in response to a public proxy or consent  solicitation  made pursuant to,
and in accordance with, the applicable rules and regulations  promulgated  under
the Exchange Act and (2) is not also then  reportable  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 with which such Person has any agreement,  arrangement  or  understanding
(other than customary agreements with and between underwriters and selling group
members with respect to a bona fide public offering of  securities),  written or
otherwise,  for the purpose of acquiring,  holding, voting (except to the extent
contemplated  by  the  proviso  to  Section  1(c)(ii)(B))  or  disposing  of any
securities of the Company.

     Notwithstanding  anything in this definition of Beneficial Ownership to the
contrary,  (A) the phrase  "then  outstanding,"  when used with  reference  to a
Person's  Beneficial  Ownership 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 own  beneficially  hereunder,  and (B) a  Person  who is a
director  or officer of the Company or who is an  Affiliate  or  Associate  of a
director or officer of the Company  (each,  an "Exempted  Person")  shall not be
deemed to  "beneficially  own"  Common  Shares held by another  Exempted  Person
solely by reason of any  agreement,  arrangement  or  understanding,  written or
otherwise,  entered into in opposition  to a transaction  that, at the time such
agreement,  arrangement or understanding was entered into, has not been approved
or recommended by the Board of Directors to the stockholders of the Company.

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

                  (e)  "Close of  Business"  on any given  date  shall mean 5:00
p.m., Pacific Time, on such date; provided,  however, that if such date is not a
Business  Day it shall  mean 5:00 p.m.,  Pacific  Time,  on the next  succeeding
Business Day.

                  (f) "Common  Shares"  when used with  reference to the Company
shall  mean the  shares  of common  stock,  par value  $0.01 per  share,  of the
Company.  "Common  Shares" when used with reference to any Person other than the
Company  shall mean the capital  stock (or 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.

                  (g) "Designated  Percentage"  shall have the meaning set forth
in Section 1(a) hereof.

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

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

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

                  (k) "Person"  shall mean any  individual,  firm,  corporation,
partnership, limited partnership,  business trust, unincorporated association or
other  entity,  and shall include any successor (by merger or otherwise) of such
entity.

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

                  (m)  "Preferred  Shares"  shall mean shares of Series A Junior
Participating  Preferred Stock, par value $0.01 per share, of the Company having
the rights and preferences set forth in the Certificate of Designations attached
to this Agreement as Exhibit A.

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

                  (o)  "Shares  Acquisition  Date" shall mean the earlier of the
date of (i) the public  announcement by the Company or an Acquiring  Person that
an Acquiring  Person has become such or (ii) the public  disclosure  of facts by
the Company or an  Acquiring  Person  indicating  that an  Acquiring  Person has
become such.

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

                  (q)  A   "Successor"   shall   mean   the   estate   or  legal
representative  of  a  deceased  individual,   the  beneficiary  of  a  deceased
individual's estate, a trust created by a deceased individual as grantor, or the
beneficiary of a trust created by a deceased individual as grantor.

         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.

         Section 3.  Issue of Right Certificates.

                  (a) Until the  earlier  of (i) the tenth day after the  Shares
Acquisition  Date or (ii) the tenth  Business  Day (or such later date as may be
determined by action of the Board of Directors of the Company prior to such time
as any Person becomes an Acquiring  Person) after the first public  announcement
of the  intention of any Person (other than the Company,  any  Subsidiary of the
Company,  any employee  benefit plan of the Company or of any  Subsidiary of the
Company or any entity  holding Common Shares for or pursuant to the terms of any
such plan) to  commence a tender or  exchange  offer the  consummation  of which
would result in any such Person becoming an Acquiring Person (including any such
date which is after the date of this  Agreement and prior to the issuance of the
Rights;  the earlier of such dates being herein referred to as the "Distribution
Date");  (x) the Rights will be evidenced  (subject to the provisions of Section
3(b) hereof) by the  certificates  for Common Shares  registered in the names of
the  holders  thereof  (which  certificates  shall  also be  deemed  to be Right
Certificates)  and not by  separate  Right  Certificates,  and (y) the  right to
receive Right  Certificates  will be  transferable  only in connection  with the
transfer of Common Shares. As soon as practicable  after the Distribution  Date,
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
Common  Shares as of the Close of  Business  on the  Distribution  Date,  at the
address of such holder shown on the records of the Company, a Right Certificate,
in  substantially  the  form  of  Exhibit  B  hereto  (a  "Right  Certificate"),
evidencing one Right for each Common Share so held. As of the Distribution Date,
the Rights will be evidenced solely by such Right Certificates.

                  (b) On the Record Date, or as soon as practicable  thereafter,
the  Company  will send a copy of a Summary  of  Rights  to  Purchase  Preferred
Shares, in substantially the form of Exhibit C hereto (the "Summary of Rights"),
by first-class,  postage-prepaid mail, to each record holder of Common Shares 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 Common Shares
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 earlier of the Redemption Date or the Final Expiration
Date),  the  surrender  for  transfer  of  any  certificate  for  Common  Shares
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 Common Shares represented thereby.

                  (c)  Certificates  for Common Shares which become  outstanding
(including, without limitation, reacquired Common Shares referred to in the last
sentence of this  paragraph (c)) after the Record Date but prior to the earliest
of the Distribution Date, the Redemption Date or the Final 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  (the  "Rights")  as set  forth  in a Rights
                Agreement between Premisys Communications,  Inc. and ChaseMellon
                Shareholder Services, L.L.C., dated as of September 18, 1998, as
                such may subsequently be amended (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
                Premisys  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.  Premisys  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.  As
                described in Section 11(a)(ii) of the Rights  Agreement,  Rights
                beneficially owned by any Person who becomes an Acquiring Person
                (as defined in the Rights  Agreement)  and certain other Persons
                shall become null and void.

With respect to such  certificates  containing the foregoing  legend,  until the
Distribution  Date, the Rights associated with the Common Shares  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 Common Shares represented thereby. In
the event that the Company  purchases  or acquires  any Common  Shares after the
Record Date but prior to the Distribution  Date, any Rights associated with such
Common  Shares shall be deemed  cancelled  and retired so that the Company shall
not be entitled to exercise any Rights  associated  with the Common Shares which
are no longer outstanding.

         Section 4. Form of Right Certificates.  The Right Certificates (and the
forms of election to purchase  Preferred  Shares 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 on which the Rights
may from time to time be listed,  or to  conform to usage.  Subject to the other
provisions of this Agreement,  the Right  Certificates shall entitle the holders
thereof to purchase  such number of one  one-hundredth  of a Preferred  Share as
shall be set forth  therein at the  Purchase  Price,  but the number of such one
one-hundredths  of a Preferred  Share and the Purchase Price shall be subject to
adjustment as provided herein.

         Section 5.  Countersignature  and Registration.  The Right Certificates
shall be  executed on behalf of the  Company by its  Chairman of the Board,  its
Chief  Executive  Officer,  its President,  any of its Vice  Presidents,  or its
Treasurer, 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 any  Assistant  Secretary of the  Company,  either  manually or by
facsimile signature.  The Right Certificates shall be manually  countersigned by
the Rights Agent  (unless  applicable  exchange  rules and law permit  facsimile
signature,  in which case the Rights Agent  signature may be by  facsimile)  and
shall not be valid for any purpose unless countersigned.  In case any officer of
the Company who shall have signed any of the Right  Certificates  shall cease to
be such officer of the Company before  countersignature  by the Rights Agent and
issuance and delivery by the Company, such Right 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 Right
Certificates  had not ceased to be such  officer of the  Company;  and any Right
Certificate  may be signed on behalf of the  Company by any person  who,  at the
actual  date of the  execution  of such  Right  Certificate,  shall  be a proper
officer of the Company to sign such Right  Certificate,  although at the date of
the execution of this Rights Agreement any such person was not such an officer.

         Following the Distribution Date, the Rights Agent will keep or cause to
be kept, at its principal  office,  books for  registration  and transfer of the
Right  Certificates  issued  hereunder.  Such  books  shall  show the  names and
addresses of the  respective  holders of the Right  Certificates,  the number of
Rights  evidenced on its face by each of the Right  Certificates and the date of
each of the Right Certificates.

         Section  6.  Transfer,  Split Up,  Combination  and  Exchange  of Right
Certificates;  Mutilated, Destroyed, Lost or Stolen Right Certificates.  Subject
to the provisions of Section 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
earlier  of the  Redemption  Date  or  the  Final  Expiration  Date,  any  Right
Certificate or Right Certificates  (other than Right  Certificates  representing
Rights that have become void pursuant to Section  11(a)(ii)  hereof or that have
been  exchanged  pursuant  to Section 24 hereof) may be  transferred,  split up,
combined or  exchanged  for another  Right  Certificate  or Right  Certificates,
entitling the registered holder to purchase a like number of one  one-hundredths
of a Preferred Share as the Right Certificate or Right Certificates  surrendered
then  entitled  such  holder to  purchase.  Any  registered  holder  desiring to
transfer,  split  up,  combine  or  exchange  any  Right  Certificate  or  Right
Certificates  shall make such request in writing  delivered to the Rights Agent,
and  shall  surrender  the  Right  Certificate  or  Right   Certificates  to  be
transferred,  split up,  combined or  exchanged at the  principal  office of the
Rights  Agent.  Thereupon  the Company  shall execute and the Rights Agent shall
countersign  and deliver to the person entitled  thereto a Right  Certificate or
Right Certificates, as the case may be, as so requested. The Company may require
payment  of a sum  sufficient  for any tax or  governmental  charge  that may be
imposed in connection  with any transfer,  split up,  combination or exchange of
Right Certificates.

         Upon receipt by the Company and the Rights Agent of evidence reasonably
satisfactory  to them of the loss,  theft,  destruction or mutilation of a Right
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 Right  Certificate  if  mutilated,  the Company  will make and deliver a new
Right  Certificate  of like  tenor  to the  Rights  Agent  for  delivery  to the
registered holder in lieu of the Right Certificate so lost, stolen, destroyed or
mutilated.

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

                  (a)  The  registered  holder  of  any  Right  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
Right  Certificate,  with the form of election  to purchase on the reverse  side
thereof duly executed, to the Rights Agent at the principal office of the Rights
Agent, together with payment of the Purchase Price for each one one-hundredth of
a  Preferred  Share as to which the  Rights  are  exercised,  at or prior to the
earliest  of (i) the  Close of  Business  on  September  18,  2008  (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.

                  (b)  The  Purchase  Price  for  each  one  one-hundredth  of a
Preferred  Share  pursuant to the exercise of a Right shall  initially be $80.00
(the  "Purchase  Price"),  shall be subject to  adjustment  from time to time as
provided in  Sections  11 and 13 hereof and shall be payable in lawful  money of
the United States of America in accordance with paragraph (c) below.

                  (c)  Upon   receipt  of  a  Right   Certificate   representing
exercisable  Rights,  with the form of election to purchase and certificate duly
executed,  accompanied  by  payment of the  Purchase  Price for the shares to be
purchased and an amount equal to any applicable transfer tax required to be paid
by the holder of such Right  Certificate in accordance  with Section 9 hereof by
certified  check,  cashier's  check or money  order  payable to the order of the
Company,  the Rights Agent shall thereupon promptly (i) (A) requisition from any
transfer agent of the Preferred  Shares  certificates  for the number of one-one
hundredths  of a  Preferred  Share  to  be  purchased  and  the  Company  hereby
irrevocably  authorizes its transfer agent to comply with all such requests,  or
(B) requisition from any depositary  agent for the Preferred  Shares  depositary
receipts  representing such number of one one-hundredths of a Preferred Share as
are to be  purchased  (in  which  case  certificates  for the  Preferred  Shares
represented  by such 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  Preferred 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 Right Certificate, registered in such name or names as
may be  designated  by such  holder and (iv) when  appropriate,  after  receipt,
deliver  such cash to or upon the order of the  registered  holder of such Right
Certificate.

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

                  (e) The Company  covenants and agrees that it will cause to be
reserved and kept available, out of its authorized and unissued Preferred Shares
or any  Preferred  Shares held in its treasury,  the number of Preferred  Shares
that will be sufficient to permit the exercise in full of all outstanding Rights
in accordance with this Section 7.

                  (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 following the form of
election to  purchase  set forth on the  reverse  side of the Right  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 Right  Certificates.  All
Right 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 Right
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  Right  Certificate  purchased  or acquired by the
Company otherwise than upon the exercise thereof. The Rights Agent shall deliver
all  cancelled  Right  Certificates  to the  Company,  or shall,  at the written
request of the Company,  destroy such cancelled Right Certificates,  and in such
case shall deliver a certificate of destruction thereof to the Company.

         Section 9. Status and  Availability  of Preferred  Shares.  The Company
covenants  and agrees that it will take all such action as may be  necessary  to
ensure that all Preferred Shares delivered upon exercise of Rights shall, at the
time of delivery  of the  certificates  for such  Preferred  Shares  (subject to
payment of the Purchase  Price),  be duly and validly  authorized and issued and
fully paid and non-assessable shares.

         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 Right  Certificates  or of
any  Preferred  Shares  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 Right  Certificates  to a person other than,  or the
issuance or delivery of  certificates  or depositary  receipts for the Preferred
Shares  in a name  other  than  that of,  the  registered  holder  of the  Right
Certificate evidencing Rights surrendered for exercise or to issue or to deliver
any  certificates or depositary  receipts for Preferred Shares upon the exercise
of any  Rights  until  any such tax  shall  have  been  paid (any such tax being
payable by the holder of such Right  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 Shares Record Date. Each person in whose name any
certificate for Preferred Shares is issued upon the exercise of Rights shall for
all  purposes  be deemed to have  become the  holder of record of the  Preferred
Shares  represented  thereby on, and such  certificate  shall be dated, the date
upon which the Right Certificate evidencing such Rights was duly surrendered and
payment of the  Purchase  Price (and any  applicable  transfer  taxes) was made.
Prior to the  exercise of the Rights  evidenced  thereby,  the holder of a Right
Certificate  shall not be entitled to any rights of a holder of Preferred Shares
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 of Preferred Shares 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 Shares payable in
Preferred Shares,  (B) subdivide the outstanding  Preferred Shares,  (C) combine
the outstanding  Preferred  Shares into a smaller number of Preferred  Shares or
(D) issue any shares of its capital stock in a reclassification of the Preferred
Shares (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 Right  exercised  after such time shall be entitled to
receive the aggregate  number and kind of shares of capital stock which, if such
Right had been exercised  immediately prior to such date, 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.

     (ii) Subject to the last paragraph of this subparagraph (ii) and to Section
24 of this  Agreement,  in the event that any Person  shall  become an Acquiring
Person,  unless the event  causing the  Designated  Percentage  threshold  to be
crossed and the Person to thereby  become an Acquiring  Person is a  transaction
set forth in Section 13 hereof,  each holder of a Right shall  thereafter have a
right to receive,  upon  exercise  thereof at a price equal to the then  current
Purchase  Price  multiplied by the number of one  one-hundredths  of a Preferred
Share for which a Right is then  exercisable,  in  accordance  with the terms of
this Agreement and in lieu of Preferred Shares,  such number of Common Shares of
the  Company as shall  equal the result  obtained  by (x)  multiplying  the then
current Purchase Price by the number of one  one-hundredths of a Preferred Share
for which a Right is then  exercisable  and dividing  that product by (y) 50% of
the  then  current  per  share  market  price  of the  Company's  Common  Shares
(determined  pursuant to Section 11(d) hereof) on the date such Person became an
Acquiring Person.

     From and after the occurrence of any Person  becoming an Acquiring  Person,
any Rights that are or were  acquired or  beneficially  owned by such  Acquiring
Person (or any  Associate or Affiliate of such  Acquiring  Person) shall be void
and any holder of such Rights shall  thereafter  have no right to exercise  such
Rights under any  provision of this  Agreement.  No Right  Certificate  shall be
issued pursuant to Section 3 that  represents  Rights  beneficially  owned by an
Acquiring  Person whose Rights would be void pursuant to the preceding  sentence
or any Associate or Affiliate  thereof;  no Right Certificate shall be issued at
any time upon the  transfer of any Rights to an  Acquiring  Person  whose Rights
would be void pursuant to the  preceding  sentence or any Associate or Affiliate
thereof or to any nominee of such Acquiring Person,  Associate or Affiliate; and
any Right Certificate delivered to the Rights Agent for transfer to an Acquiring
Person  whose  Rights would be void  pursuant to the  preceding  sentence or any
Associate or Affiliate  thereof shall be cancelled.  This paragraph  shall apply
not only to an initial Acquiring Person, and its Affiliates and Associates,  but
also to subsequent Acquiring Persons, and their Affiliates and Associates.

     (iii) In the event that the number of Common Shares which are authorized by
the Company's  certificate of  incorporation  and not  outstanding or subscribed
for, or reserved or otherwise  committed  for  issuance for purposes  other than
upon  exercise of the  Rights,  is not  sufficient  to permit the holder of each
Right to  purchase  the number of Common  Shares to which such  holder  would be
entitled  upon  the  exercise  in full of the  Rights  in  accordance  with  the
foregoing  subparagraph  (ii) of  paragraph  (a) of this Section 11, the Company
shall:  (A) determine the excess of (1) the value of the Common Shares  issuable
upon the  exercise of a Right  (calculated  as provided in the last  sentence of
this  subparagraph  (iii))  pursuant to Section  11(a)(ii)  hereof (the "Current
Value") over (2) the Purchase Price (such excess,  the  "Spread"),  and (B) with
respect to each Right,  make adequate  provision to  substitute  for such Common
Shares, upon payment of the applicable Purchase Price, (1) cash, (2) a reduction
in the  Purchase  Price,  (3) Common  Shares or other equity  securities  of the
Company (including, without limitation, shares, or units of shares, of preferred
stock which the Board of  Directors  of the Company has  determined  to have the
same value as shares of common  stock (such  equity  securities,  "common  stock
equivalents")), (4) debt securities of the Company, (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 in good faith;  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) the first  occurrence  of an event
triggering the rights to purchase Common Shares  described in Section  11(a)(ii)
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)(ii) Trigger Date"),  then the Company shall be obligated to deliver,  upon
the surrender for exercise of a Right without  requiring payment of the Purchase
Price,  shares of common stock (to the extent available) and then, if necessary,
cash, which shares and cash have an aggregate value equal to the Spread.  If the
Board of  Directors  of the  Company  shall  determine  in good faith that it is
likely that sufficient additional shares of common stock could be authorized for
issuance  upon  exercise in full of the  Rights,  the thirty (30) day period set
forth above may be extended  to the extent  necessary,  but not more than ninety
(90) days after the Section  11(a)(ii)  Trigger  Date, in order that the Company
may seek stockholder  approval for the  authorization of such additional  shares
(such period, as it may be extended,  the "Substitution  Period"). To the extent
that the Company determines that some action need be taken pursuant to the first
and/or  second  sentences  of this  Section  11(a)(iii),  the  Company (x) shall
provide,  subject to Section 7(f) hereof, that such action shall apply uniformly
to all outstanding  Rights, and (y) may suspend the exercisability of the Rights
until  the  expiration  of  the  Substitution   Period  in  order  to  seek  any
authorization  of  additional  shares and/or to decide the  appropriate  form of
distribution  to be made  pursuant to such first  sentence and to determine  the
value  thereof.  In the event of any such  suspension,  the Company shall make a
public announcement,  and shall deliver to the Rights Agent a statement, stating
that the  exercisability of the Rights has been temporarily  suspended.  At such
time as the  suspension  is no longer in effect,  the Company shall make another
public  announcement,  and deliver to the Rights Agent a statement,  so stating.
For purposes of this Section 11(a)(iii), the value of the Common Shares shall be
the current per share market price (as determined  pursuant to Section  11(d)(i)
hereof) of the Common Shares on the Section 11(a)(ii) Trigger Date and the value
of any "common stock  equivalent"  shall be deemed to have the same value as the
Common Shares on such date.

                  (b) In case  the  Company  shall  fix a  record  date  for the
issuance  of rights,  options or warrants  to all  holders of  Preferred  Shares
entitling them to subscribe for or purchase  Preferred  Shares (or shares having
the same rights, privileges and preferences as the Preferred Shares ("equivalent
preferred   shares"))  or  securities   convertible  into  Preferred  Shares  or
equivalent  preferred  shares  at a price  per  Preferred  Share  or  equivalent
preferred  share  (or  having  a  conversion  price  per  share,  if a  security
convertible into Preferred Shares or equivalent  preferred shares) less than the
then  current  per share  market  price of the  Preferred  Shares (as defined in
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 Preferred Shares outstanding on such record date plus the
number of  Preferred  Shares  which the  aggregate  offering  price of the total
number of Preferred Shares and/or  equivalent  preferred shares 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 Preferred Shares outstanding on such record date
plus the number of  additional  Preferred  Shares  and/or  equivalent  preferred
shares to be offered for subscription or purchase (or into which the convertible
securities so to be offered are initially convertible);  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. 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 the Board of
Directors of the Company,  whose determination shall be described in a statement
filed with the Rights Agent.  Preferred  Shares 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 the making
of a  distribution  to all holders of the Preferred  Shares  (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
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription  rights or warrants  (excluding those referred
to in Section  11(b)  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 of the Preferred Shares on such
record  date,  less the fair market  value (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) of the portion of the assets or evidences
of indebtedness so to be distributed or of such subscription  rights or warrants
applicable to one  Preferred  Share and the  denominator  of which shall be such
current per share market price of the Preferred Shares; 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
to be  issued  upon  exercise  of one  Right.  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 30  consecutive  Trading
Days (as such  term is  hereinafter  defined)  immediately  prior to such  date;
provided,  however, that in the event that the current per 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 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 New York Stock  Exchange or,
if the  Security  is not  listed or  admitted  to  trading on the New York Stock
Exchange, 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 Stock Market 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 the Board of Directors of the Company.  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 Shares shall be determined in accordance with the
method set forth in Section  11(d)(i).  If the Preferred Shares are not publicly
traded,  the "current per share market price" of the  Preferred  Shares shall be
conclusively  deemed to be the  current  per share  market  price of the  Common
Shares as determined  pursuant to Section  11(d)(i)  (appropriately  adjusted to
reflect any stock split, stock dividend or similar  transaction  occurring after
the date hereof),  multiplied  by one hundred.  If neither the Common Shares nor
the  Preferred  Shares are  publicly  held or so listed or traded,  "current per
share market  price" 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.

                  (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-millionth
of a Preferred Share or one one-thousandth 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 three years
from the date of the transaction which requires such adjustment.

                  (f) If as a result of an  adjustment  made pursuant to Section
11(a) hereof, the holder of any Right thereafter exercised shall become entitled
to receive  any  shares of capital  stock of the  Company  other than  Preferred
Shares, the number of such other shares so receivable upon exercise of any Right
shall  thereafter 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  Shares  contained in Section  11(a) through (c),  inclusive,  and the
provisions  of Sections  7, 9, 10 and 13 with  respect to the  Preferred  Shares
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 one one-hundredths of a
Preferred  Share  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
one  one-hundredths  of  a  Preferred  Share  (calculated  to  the  nearest  one
one-millionth  of a Preferred  Share) obtained by (i) multiplying (x) the number
of one  one-hundredths  of a share 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 and (ii)  dividing the product so obtained by
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 one  one-hundredths  of a Preferred  Share
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
one  one-hundredths  of a  Preferred  Share for  which a Right  was  exercisable
immediately  prior to such  adjustment.  Each Right held of record prior to such
adjustment  of  the  number  of  Rights  shall  become  that  number  of  Rights
(calculated to the nearest one one-thousandth) obtained by dividing 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 Right
Certificates  have been  distributed,  shall be at least 10 days  later than the
date of the public  announcement.  If Right  Certificates have been distributed,
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 Right Certificates on such record date Right 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 Right Certificates held by such holders prior to the date of
adjustment,  and upon surrender thereof,  if required by the Company,  new Right
Certificates  evidencing  all the Rights to which such holders shall be entitled
after such adjustment.  Right 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 Right  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 one one-hundredths of a Preferred Share issuable upon the
exercise of the Rights, the Right Certificates theretofore and thereafter issued
may continue to express the Purchase Price and the number of one  one-hundredths
of a Preferred  Share which were  expressed  in the initial  Right  Certificates
issued hereunder.

                  (k) Before  taking any action that would  cause an  adjustment
reducing the Purchase Price below one one-hundredth of the then par value of the
Preferred  Shares  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
non-assessable Preferred Shares 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 Right exercised after such record date of
the Preferred  Shares and other  capital stock or securities of the Company,  if
any,  issuable upon such exercise over and above the Preferred  Shares 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 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  Shares,  (ii)  issuance  wholly  for  cash  of  Preferred  Shares  or
securities  which  by their  terms  are  convertible  into or  exchangeable  for
Preferred  Shares,  (iii)  dividends  on Preferred  Shares  payable in Preferred
Shares  or  (iv)  issuance  of any  rights,  options  or  warrants  referred  to
hereinabove  in Section  11(b),  hereafter made by the Company to holders of its
Preferred Shares shall not be taxable to such stockholders.

                  (n) 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 the Common Shares  payable in Common Shares or (ii) effect a
subdivision,   combination   or   consolidation   of  the   Common   Shares  (by
reclassification  or  otherwise  other than by payment  of  dividends  in Common
Shares) into a greater or lesser number of Common Shares,  then in any such case
(i) the number of one one-hundredths of a Preferred Share purchasable after such
event upon proper  exercise of each Right shall be determined by multiplying the
number of one  one-hundredths  of a Preferred  Share so purchasable  immediately
prior to such  event by a  fraction,  the  numerator  of which is the  number of
Common Shares  outstanding  immediately before such event and the denominator of
which is the number of Common Shares  outstanding  immediately after such event,
and (ii) each Common Share  outstanding  immediately after such event shall have
issued  with  respect  to it that  number  of Rights  which  each  Common  Share
outstanding  immediately  prior to such event had issued with respect to it. The
adjustments  provided  for in this  Section  11(n)  shall  be made  successively
whenever such a dividend is declared or paid or such a subdivision,  combination
or consolidation is effected.

                  (o)  The  Company   covenants  and  agrees  that,   after  the
Distribution  Date, it will not,  except as permitted by Sections 23, 24 and 27,
take (or permit any Subsidiary to take) any action if the purpose of such action
is to, or if at the time such action is taken it is reasonably  foreseeable that
such action will,  diminish  substantially or eliminate the benefits intended to
be afforded by the Rights.

         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  Common  Shares or the
Preferred Shares a copy of such certificate and (c) mail a brief summary thereof
to each holder of a Right Certificate in accordance with Section 25 hereof.

         Section  13.  Consolidation,  Merger or Sale or  Transfer  of Assets or
Earning  Power.  In the event that any Person shall become an Acquiring  Person,
and,  directly or indirectly,  (a) the Company shall  consolidate with, or merge
with and into, an Acquiring Person, or an Affiliate or Associate of an Acquiring
Person,  (b) an  Acquiring  Person or an  Affiliate or Associate of an Acquiring
Person,  shall consolidate with the Company,  or merge with and into the Company
and the Company shall be the continuing or surviving  corporation of such merger
and, in connection  with such merger,  all or part of the Common Shares shall be
changed into or exchanged for stock or other  securities of any other Person (or
the  Company) or cash or any other  property,  or (c) the Company  shall sell or
otherwise  transfer (or one or more of its Subsidiaries  shall sell or otherwise
transfer), in one or more transactions,  assets or earning power aggregating 50%
or more of the  assets or  earning  power of the  Company  and its  Subsidiaries
(taken as a whole) to an  Acquiring  Person,  or an Affiliate or Associate of an
Acquiring Person, then, and in each such case, proper provision shall be made so
that (i) each holder of a Right  (except as  otherwise  provided  herein)  shall
thereafter have the right to receive, upon the exercise thereof at a price equal
to  the  then  current   Purchase   Price   multiplied  by  the  number  of  one
one-hundredths  of a Preferred Share for which a Right is then  exercisable,  in
accordance  with the terms of this  Agreement  and in lieu of Preferred  Shares,
such number of Common  Shares of the Person in the  transaction  (including  the
Company as successor thereto or as the surviving corporation) who is issuing the
consideration  with  the  greatest  fair  market  value to the  Company  and its
stockholders in connection  with such  transaction  (the "Principal  Issuer") as
shall equal the result  obtained by (A)  multiplying  the then current  Purchase
Price by the number of one one-hundredths of a Preferred Share for which a Right
is then exercisable and dividing that product by (B) 50% of the then current per
share  market price of the Common  Shares of the  Principal  Issuer  (determined
pursuant  to  Section  11(d)  hereof)  on  the  date  of  consummation  of  such
consolidation,  merger,  sale or  transfer;  (ii)  the  Principal  Issuer  shall
thereafter  be liable for, and shall  assume,  by virtue of such  consolidation,
merger, sale or transfer, all the obligations and duties of the Company pursuant
to this Agreement;  (iii) the term "Company" shall thereafter be deemed to refer
to the Principal  Issuer;  and (iv) the  Principal  Issuer shall take such steps
(including,  but not limited to, the  reservation of a sufficient  number of its
Common  Shares in  accordance  with  Section 9 hereof) in  connection  with such
consummation  as may be  necessary  to assure that the  provisions  hereof shall
thereafter be  applicable,  as nearly as  reasonably  may be, in relation to the
Common  Shares  thereafter  deliverable  upon the  exercise of the  Rights.  The
Company   covenants   and  agrees  that  it  shall  not   consummate   any  such
consolidation, merger, sale or transfer unless prior thereto the Company and the
Principal  Issuer  shall have  executed  and  delivered  to the  Rights  Agent a
supplemental  agreement  so  providing.  The  Company  shall not enter  into any
transaction  of the kind  referred to in this  Section 13 if at the time of such
transaction   there  are  any  rights,   warrants,   instruments  or  securities
outstanding  or  any  agreements  or  arrangements  which,  as a  result  of the
consummation of such transaction,  would eliminate or substantially diminish the
benefits  intended to be afforded by the Rights.  The provisions of this Section
13 shall similarly  apply to successive  mergers or  consolidations  or sales or
other transfers.

         Section 14.  Fractional Rights and Fractional Shares.

                  (a) The Company  shall not be required to issue  fractions  of
Rights or to distribute Right Certificates which evidence  fractional Rights. In
lieu of such fractional Rights, there shall be paid to the registered holders of
the  Right  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 New York
Stock  Exchange  or, if the Rights are not listed or  admitted to trading on the
New York Stock Exchange, 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 Board of Directors  of the Company.  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  Shares  (other than  fractions  which are  integral  multiples of one
one-hundredth of a Preferred Share) upon exercise of the Rights or to distribute
certificates  which evidence  fractional  Preferred Shares (other than fractions
which  are  integral  multiples  of one  one-hundredth  of a  Preferred  Share).
Fractions of Preferred  Shares in integral  multiples of one  one-hundredth of a
Preferred Share 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,  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
Shares represented by such depositary receipts.  In lieu of fractional Preferred
Shares  that are not  integral  multiples  of one  one-hundredth  of a Preferred
Share, the Company shall pay to the registered  holders of Right Certificates at
the time such Rights are exercised as herein provided an amount in cash equal to
the same fractions of the current market value of one Preferred  Share.  For the
purposes of this Section 14(b),  the current  market value of a Preferred  Share
shall be the closing price of a Preferred  Share (as determined  pursuant to the
second  sentence of Section  11(d)(i)  hereof)  for the Trading Day  immediately
prior to the date of such exercise.

                  (c) The  holder  of a Right  by the  acceptance  of the  Right
expressly  waives any right to receive  fractional  Rights or 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 Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the  Distribution  Date, of the Common  Shares) may,  without the consent of the
Rights Agent or of the holder of any other Right  Certificate  (or, prior to the
Distribution  Date, of the Common  Shares),  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  Right
Certificate  in the  manner  provided  in  such  Right  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  under,  and
injunctive relief against actual or threatened  violations of the obligations of
any Person subject to, this Agreement.

         Section 16.  Agreement of Right  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 the Common Shares;

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

                  (c) the  Company  and the Rights  Agent may deem and treat the
person in whose name the Right Certificate (or, prior to the Distribution  Date,
the associated  Common Shares  certificate)  is registered as the absolute owner
thereof and of the Rights evidenced  thereby  (notwithstanding  any notations of
ownership or writing on the Right  Certificates or the associated  Common Shares
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.

         Section  17.  Right  Certificate  Holder Not Deemed a  Stockholder.  No
holder,  as such, of any Right  Certificate  shall be entitled to vote,  receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other  securities  of the  Company  which  may at any  time be  issuable  on the
exercise of the Rights  represented  thereby nor shall anything contained herein
or in any Right  Certificate be construed to confer upon the holder of any Right
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  Right  Certificate  shall  have  been  exercised  in  accordance  with the
provisions hereof.

         Section 18. Compensation and Indemnity of 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
(including employees,  directors,  officers and agents of the Rights Agent) for,
and to hold it  harmless  against,  any loss,  liability  or  expense,  incurred
without  negligence,  bad faith or willful  misconduct on the part of the Rights
Agent (including employees, directors, officers and agents of the Rights Agent),
for  anything  done  or  omitted  by  the  Rights  Agent  (including  employees,
directors,  officers  and agents of the  Rights  Agent) in  connection  with the
acceptance and  administration  of this  Agreement.  In no case shall the Rights
Agent be liable for  special,  indirect,  incidental  or  consequential  loss or
damage, even if the Rights Agent has been advised of the likelihood of such loss
or damage.

         Section 19. Merger or  Consolidation or Change of Name of Rights Agent.
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 Right  Certificates  shall have been countersigned but
not delivered, any such successor Rights Agent may adopt the countersignature of
the   predecessor   Rights  Agent  and  deliver  such  Right   Certificates   so
countersigned;  and in case at that time any of the Right Certificates shall not
have been  countersigned,  any successor Rights Agent may countersign such Right
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 Right  Certificates
shall  have  the full  force  provided  in the  Right  Certificates  and in this
Agreement.

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

         Section  20.  Rights  and  Duties of Rights  Agent.  The  Rights  Agent
undertakes  the  duties  and  obligations  imposed  by this  Agreement  upon the
following terms and  conditions,  by all of which the Company and the holders of
Right Certificates, by their acceptance thereof, shall be bound:

                  (a) The Rights Agent may consult  with legal  counsel (who may
be legal counsel for the Company), and the opinion of such counsel shall be full
and complete  authorization  and protection to the Rights Agent as to any action
taken or omitted by it in good faith and in accordance with such opinion.

                  (b)  Whenever  in the  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 or suffering 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 General Counsel,
the Treasurer or the Secretary of the Company and delivered to the Rights Agent;
and such  certificate  shall be full  authorization  to the Rights Agent for any
action  taken or  suffered  in good  faith by it under  the  provisions  of this
Agreement in reliance upon such certificate.

                  (c) The Rights  Agent  shall be  protected  and shall incur no
liability for any action taken, suffered or omitted by it in good faith unless a
court of  competent  jurisdiction  determines  that  the  Rights  Agent's  gross
negligence  or  willful  misconduct  was the  primary  cause  of any loss to the
Company  or any holder of a Right  Certificate  (or,  prior to the  Distribution
Date, any holder of a Right as holder of a Common Share). The Rights Agent makes
no  representation  or warranty with respect to and is not  responsible  for the
validity,  value or  availability of the Rights,  the Right  Certificates or the
Preferred Shares.

                  (d) The Rights  Agent  shall be  protected  and shall incur no
liability  for any action taken,  suffered or omitted by it in connection  with,
its  administration  of this Agreement in reliance upon any Right Certificate or
certificate  for the  Common  Shares 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 this Section 20.

                  (e)  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.

                  (f) The Rights  Agent is hereby  authorized  and  directed  to
accept instructions with respect to the performance of its duties hereunder from
any  one  of the  Chairman  of the  Board,  the  Chief  Executive  Officer,  the
President,  any Vice  President,  the  General  Counsel,  the  Secretary  or the
Treasurer  of the  Company,  and  to  apply  to  such  officers  for  advice  or
instructions in connection  with its duties,  and it shall not be 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 with respect to its
duties or obligations  under this Rights  Agreement and the date on and/or after
which such action  shall be taken or omitted  and the Rights  Agent shall not be
liable for any action taken or omitted in accordance with a proposal included in
any such  application on or after the date  specified  therein (which date shall
not be less than three  Business  Days after the date any such officer  actually
receives  such  application,  unless any such  officer  shall have  consented in
writing to an earlier date) unless, prior to taking or omitting any such action,
the  Rights  Agent  has  received  written  instructions  in  response  to  such
application specifying the action to be taken or omitted.

                  (g) 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.

                  (h) 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.

         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 30 days' notice in writing mailed to the Company and to each transfer agent
of the Common Shares or Preferred Shares by registered or certified mail, and to
the  holders of the Right  Certificates  by  first-class  mail.  The Company may
remove the Rights  Agent or any  successor  Rights Agent upon 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  Shares or  Preferred  Shares by
registered or certified  mail, and to the holders of the Right  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 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 Right  Certificate (who shall,
with such notice,  submit such holder's Right  Certificate for inspection by the
Company),  then the registered  holder of any Right 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 (i) a corporation  organized and doing  business  under the laws of the
United States or of the State of California (or of any other state of the United
States so long as such  corporation  is  authorized  to do business as a banking
institution in the State of California),  in good standing,  having an office in
the  State of  California,  which is  authorized  under  such  laws to  exercise
corporate  trust or stock  transfer  powers  and is 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 dollars or (ii) a subsidiary of a corporation described in clause (i) of
this sentence.  After  appointment,  the successor  Rights Agent shall be vested
with the same  powers,  rights,  duties and  responsibilities  as if it had been
originally  named  as  Rights  Agent  without  further  act  or  deed;  but  the
predecessor  Rights  Agent shall  deliver and transfer to the  successor  Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance,  conveyance, act or deed necessary for the purpose. Not later
than the effective  date of any such  appointment  the Company shall file notice
thereof in writing with the predecessor  Rights Agent and each transfer agent of
the Common Shares or Preferred  Shares,  and mail a notice thereof in writing to
the  registered  holders of the Right  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 Right Certificates.  Notwithstanding any of
the provisions of this  Agreement or of the Rights to the contrary,  the Company
may, at its option, issue new Right 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  Right  Certificates  made  in
accordance  with the provisions of this  Agreement.  In addition,  following the
Distribution  Date and prior to the  redemption or expiration of the Rights,  in
connection  with the issuance or sale of Common Shares  pursuant to the exercise
of stock options or under any employee plan or arrangement or upon the exercise,
conversion or exchange of other  securities of the Company,  in each case, which
options or securities are outstanding prior to the Distribution  Date, the Board
of Directors shall issue Rights Certificates representing the appropriate number
of Rights in connection with such issuance or sale; provided,  however, that (i)
no such Rights  Certificate  shall be issued and this sentence shall be null and
void ab initio if, and to the extent that,  such issuance or this sentence would
create a significant  risk of or result in material  adverse tax consequences to
the  Company or the Person to whom such  Rights  Certificate  would be issued or
would create a significant risk of or result in such options' or employee plans'
or  arrangements'  failing  to  qualify  for  otherwise  available  special  tax
treatment  and (ii) no such  Rights  Certificate  shall be issued if, and to the
extent that,  appropriate  adjustment  shall otherwise have been made in lieu of
the issuance thereof.

         Section 23.  Redemption.

                  (a) The Board of Directors of the Company may, by a resolution
of the Board of Directors,  at its option, at any time prior to such time as any
Person  becomes an Acquiring  Person,  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").  After the period for redemption of the
Rights  has  expired,  the Board of  Directors  may not  extend  the  period for
redemption  of the  Rights  or  otherwise  provide  for  their  redemption.  The
redemption of the Rights by the Board of Directors may be made effective at such
time, on such basis and subject to such  conditions as the Board of Directors in
its sole discretion may establish.

                  (b)  Immediately  upon the action of the Board of 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 the Board of Directors
ordering the  redemption  of the Rights  pursuant to paragraph  (a), the Company
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  Shares.  Any notice which is mailed in the manner
herein  provided shall be deemed given,  whether or not the holder  receives the
notice.  If the payment of the Redemption  Price is not included in such notice,
each such notice  shall 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 Common Shares prior to
the Distribution Date.

         Section 24.  Exchange.

                  (a) The Board of  Directors of the Company may, at its option,
at any time after any Person becomes an Acquiring  Person,  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  11(a)(ii)  hereof)
for  Common  Shares  at an  exchange  ratio  of  one  Common  Share  per  Right,
appropriately  adjusted to reflect any stock  split,  stock  dividend or similar
transaction   occurring  after  the  date  hereof  (such  exchange  ratio  being
hereinafter referred to as the "Exchange Ratio"). Notwithstanding the foregoing,
the Board of Directors  shall not be  empowered  to effect such  exchange at any
time after any Person  (other than the Company,  any  Subsidiary of the Company,
any employee  benefit plan of the Company or any such  Subsidiary  or any entity
holding  Common Shares for or pursuant to the terms of any such plan),  together
with all Affiliates and Associates of such Person,  becomes the Beneficial Owner
of a majority of the Common Shares then outstanding.

                  (b)  Immediately  upon the action of the Board of Directors of
the Company  ordering the exchange of any Rights  pursuant  Section 24(a) hereof
and  without any  further  action and without any notice,  the right to exercise
such Rights shall  terminate  and the only right  thereafter of a holder of such
Rights shall be to receive  that number of Common  Shares equal to the number of
such Rights held by such holder  multiplied by the 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 the Common  Shares  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  11(a)(ii)
hereof) held by each holder of Rights.

                  (c) In any exchange  pursuant to this Section 24, the Company,
at its option, may substitute Preferred Shares (or common stock equivalents,  as
such  term  is  defined  in  Section   11(a)(iii)   hereof)  for  Common  Shares
exchangeable for Rights, at the initial rate of one one-hundredth of a Preferred
Share (or common stock  equivalents)  for each Common  Share,  as  appropriately
adjusted to reflect  adjustments  in the voting rights of the  Preferred  Shares
pursuant  to the  terms  thereof,  so that the  fraction  of a  Preferred  Share
delivered in lieu of each Common Share shall have the same voting  rights as one
Common Share.

                  (d) In the event that  there  shall not be  sufficient  Common
Shares, Preferred Shares or common stock equivalents authorized by the Company's
certificate of incorporation  and not outstanding or subscribed for, or reserved
or otherwise  committed  for issuance for purposes  other than upon  exercise of
Rights, 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 Common Shares, Preferred Shares or common stock equivalents
for issuance upon exchange of the Rights.

                  (e) The Company  shall not be required to issue  fractions  of
Common Shares or to distribute  certificates  which evidence  fractional  Common
Shares. In lieu of such fractional  Common Shares,  the Company shall pay to the
registered  holders  of  the  Right  Certificates  with  regard  to  which  such
fractional  Common Shares would otherwise be issuable an amount in cash equal to
the same fraction of the current per share market value of a whole Common Share.
For the purposes of this  paragraph (e), the current per share market value of a
whole Common Share shall be the closing  price of a Common Share (as  determined
pursuant to the second sentence of Section  11(d)(i) hereof) for the Trading Day
immediately prior to the date of exchange pursuant to this Section 24.

         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  Shares or to make
any other  distribution  to the holders of its  Preferred  Shares  (other than a
regular quarterly cash dividend),  (ii) to offer to the holders of its Preferred
Shares  rights or  warrants  to  subscribe  for or to  purchase  any  additional
Preferred Shares or shares of stock of any class or any other securities, rights
or options,  (iii) to effect any reclassification of its Preferred Shares (other
than a reclassification  involving only the subdivision of outstanding Preferred
Shares),  (iv) to effect any  consolidation or merger into or with, 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
Shares  payable  in Common  Shares or to effect a  subdivision,  combination  or
consolidation  of the Common Shares (by  reclassification  or otherwise  than by
payment of dividends in Common  Shares),  then,  in each such case,  the Company
shall  give to the  Rights  Agent  and each  holder of a Right  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
Common Shares and/or Preferred Shares, 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 10 days prior to the record date for  determining  holders of the
Preferred Shares for purposes of such action,  and in the case of any such other
action, at least 10 days prior to the date of the taking of such proposed action
or the date of participation  therein by the holders of the Common Shares and/or
Preferred Shares, whichever shall be the earlier.

                  (b) In case any event 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 Right  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.

         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 Right  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:

                  Premisys Communications, Inc.
                  48664 Milmont Drive
                  Fremont, CA  94538
                  Attention:  Corporate Secretary

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
Right Certificate to or on the Rights Agent shall be sufficiently  given or made
if sent by first-class mail,  postage prepaid,  addressed (until another address
is filed in writing with the Company) as follows:

                  ChaseMellon Shareholder Services, L.L.C.
                  50 California Street
                  San Francisco, CA 94111
                  Attention:  Administration Department

Notices  or  demands  authorized  by this  Agreement  to be given or made by the
Company or the  Rights  Agent to the  holder of any Right  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. The Company, by a resolution of
the Board of Directors,  may from time to time,  and the Rights Agent shall,  if
the Company directs,  supplement or amend this Agreement without the approval of
any holders of Right Certificates in order to cure any ambiguity,  to correct or
supplement any provision contained herein which may be defective or inconsistent
with any other  provisions  herein,  or to make any other  provisions or changes
with  respect to the Rights which the Company may deem  necessary or  desirable,
including,  without  limitation,  to modify or amend the definition of Acquiring
Person set forth in Section 1(a) hereof,  to change the Purchase Price set forth
in Section  7(b),  or to extend or shorten  the  period  for  redemption  of the
Rights;  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  (other than an
Acquiring  Person  and  its  Affiliates  and  Associates),   including,  without
limitation,  to extend the period for  redemption  of the Rights,  or  otherwise
provide  for their  redemption,  or to provide for an earlier  Final  Expiration
Date. Any such  supplement or amendment will be evidenced by a writing signed by
the Company and the Rights Agent.

         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. 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 Right Certificates (and, prior to
the Distribution  Date, the Common Shares) 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 Right Certificates (and, prior to the Distribution Date, the Common Shares).

         Section  30.  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, then such term, provision,
covenant or restriction shall be enforced to the maximum extent permissible, and
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.

         Section 31.  Governing Law. This  Agreement and each Right  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 32. 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 33. Descriptive  Headings.  Descriptive headings of the several
Sections of this  Agreement  are  inserted  for  convenience  only and shall not
control or affect the meaning or construction of any of the provisions hereof.

         Section 34. Entire Agreement.  This Agreement contains the entire
agreement between the parties with respect to the subject matter hereof.



<PAGE>


         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.



                          Company:

                          PREMISYS COMMUNICATIONS, INC.


                          By:      /s/ John J. Hagedorn
                                   -----------------------
                          Title:   Chief Financial Officer



                          Rights Agent:

                          CHASEMELLON SHAREHOLDER
                          SERVICES, L.L.C.


                          By:      /s/ Joseph W. Thatcher Jr.
                                   --------------------------
                          Title:   Assistant Vice President



<PAGE>



A-5


                                                                       Exhibit A

                                      FORM
                                       of
                           CERTIFICATE OF DESIGNATIONS
                                       of
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       of

                          PREMISYS COMMUNICATIONS, INC.
                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)



         Premisys  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 September 17, 1998:

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

         Series A Junior Participating Preferred Stock:

         Section 1.  Designation and Amount.  The shares of such series shall be
designated  as "Series A Junior  Participating  Preferred  Stock" (the "Series A
Preferred  Stock") and the number of shares  constituting the Series A Preferred
Stock shall be 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 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 other stock) ranking prior and superior to the
Series A Preferred  Stock with  respect to  dividends,  the holders of shares of
Series A Preferred 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 first 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 of
Series A  Preferred  Stock,  in an  amount  (if any) per share  (rounded  to the
nearest cent),  subject to the provision for adjustment  hereinafter  set forth,
equal to 100 times the aggregate per share amount of all cash dividends, and 100
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,
par value $0.01 per share (the "Common Stock"),  of the Company 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 any  share or  fraction  of a share 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 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 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).

                  (C)  Dividends  due pursuant to paragraph  (A) of this Section
shall  begin to  accrue  and be  cumulative  on  outstanding  shares of Series A
Preferred Stock from the Quarterly Dividend Payment Date next preceding the date
of issue of such shares, unless the date of issue of such shares is prior to the
record  date for the  first  Quarterly  Dividend  Payment  Date,  in which  case
dividends  on such  shares  shall begin to accrue from the date of issue of such
shares, 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 100  votes on all  matters  submitted  to a vote of the  stockholders  of the
Corporation.  In the event the Corporation  shall at any time declare or pay any
dividend  on the Common  Stock  payable in shares of Common  Stock,  or effect a
subdivision or combination or consolidation of the outstanding  shares of Common
Stock (by  reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the  number of votes per share to which  holders  of shares of
Series A Preferred Stock were entitled  immediately prior to such event shall be
adjusted by multiplying such number by a fraction, the numerator of which is the
number of shares of Common Stock  outstanding  immediately  after such event and
the  denominator  of which is the  number of shares  of Common  Stock  that were
outstanding immediately prior to such event.

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

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

         Section 4.        Certain Restrictions.

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

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

                           (ii)     declare or pay dividends, or make any other
distributions, on any shares of stock  ranking  on a  parity  (either  as  to
dividends  or  upon  liquidation, dissolution or winding up) with the Series A
Preferred  Stock,  except dividends paid ratably on the 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; or

                           (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 (as to dividends and upon  dissolution,
liquidation  or winding up) to the Series A Preferred Stock.

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

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

         Section 6.        Liquidation, Dissolution or Winding Up.

                  (A) Upon any  liquidation,  dissolution  or  winding up of the
Corporation, the holders of shares of Series A Preferred Stock shall be entitled
to receive,  prior and in  preference to any  distribution  of any assets of the
Corporation  to the holders of Common  Stock,  the amount of $1.00 per share for
each  share of  Series A  Preferred  Stock  then held by them.  Thereafter,  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 100 times the aggregate  amount to be distributed per share
to holders of shares of Common  Stock plus an amount  equal to any  accrued  and
unpaid dividends.  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
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) If the assets of the  Corporation  legally  available  for
distribution  to the  holders  of  shares  of  Series  A  Preferred  Stock  upon
liquidation,  dissolution or winding up of the Corporation  are  insufficient to
pay the full  preferential  amount set forth in the first  sentence of paragraph
(A) above,  then the entire  assets of the  Corporation  legally  available  for
distribution  to the  holders of Series A Preferred  Stock shall be  distributed
among such holders in proportion to the shares of Series A Preferred  Stock then
held by them.

                  (C) The  foregoing  rights upon  liquidation,  dissolution  or
winding up provided to the holders of Series A Preferred  Stock shall be subject
to the rights of the  holders  of any other  series of  Preferred  Stock (or any
other stock)  ranking  prior and  superior to the Series A Preferred  Stock upon
liquidation, dissolution or winding up.

         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  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 100  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.

         IN WITNESS  WHEREOF,  this  Certificate of  Designations is executed on
behalf of the  Corporation  by its President and attested by its Secretary  this
day of _______________, 199_.

                                       Company:

                                       PREMISYS COMMUNICATIONS, INC.


                                       By:
                                       President

Attest:


By:________________________
           Secretary


<PAGE>




                                                                       Exhibit B
                            FORM OF RIGHT CERTIFICATE

Certificate No. R-                                                  _____ Rights

         NOT  EXERCISABLE  AFTER  SEPTEMBER 18, 2008 OR EARLIER IF REDEMPTION OR
         EXCHANGE  OCCURS.  THE RIGHTS ARE SUBJECT TO  REDEMPTION  AT $0.001 PER
         RIGHT AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.

                                RIGHT CERTIFICATE

                          PREMISYS 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  September  18, 1998 (the "Rights  Agreement"),  between
Premisys Communications, Inc., a Delaware corporation (the "Company"), and Chase
Mellon  Shareholder  Services L.L.C. (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., Pacific Time, on September 18, 2008 at
the principal  office of the Rights Agent,  or at the office of its successor as
Rights Agent, one one-hundredth of a fully paid non-assessable share of Series A
Junior Participating  Preferred Stock, par value $0.01 per share (the "Preferred
Shares"), of the Company, at a purchase price of $80.00 per one one-hundredth of
a Preferred Share (the "Purchase  Price"),  upon  presentation  and surrender of
this  Right  Certificate  with the  Certification  and the Form of  Election  to
Purchase duly executed. The number of Rights evidenced by this Right Certificate
(and  the  number  of one  one-hundredths  of a  Preferred  Share  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  _______________,  based on
the  Preferred  Shares as  constituted  at such date.  As provided in the Rights
Agreement,  the  Purchase  Price  and  the  number  of one  one-hundredths  of a
Preferred Share which may be purchased upon the exercise of the Rights evidenced
by this Right  Certificate are subject to  modification  and adjustment upon the
happening of certain events.

         This Right  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 Right  Certificates.  Copies of
the  Rights  Agreement  are on file at the  principal  executive  offices of the
Company and the above-mentioned offices of the Rights Agent.

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

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this  Certificate (i) may be redeemed by the Company at a redemption price of
$0.001  per  Right or (ii) may be  exchanged  in whole or in part for  Preferred
Shares or shares of the Company's Common Stock, par value $0.01 per share.

         No fractional  Preferred Shares will be issued upon the exercise of any
Right or Rights  evidenced  hereby  (other  than  fractions  which are  integral
multiples of one one-hundredth of a Preferred Share,  which may, at the election
of the Company, be evidenced by depository receipts), but in lieu thereof a cash
payment will be made, as provided in the Rights Agreement.

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

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

         WITNESS the facsimile  signature of the proper  officers of the Company
and its corporate seal. Dated as of ______________________.



ATTEST:                                 Company:

                                        PREMISYS COMMUNICATIONS, INC.


By:                                     By:

Countersigned:

Rights Agent:

CHASE MELLON SHAREHOLDER
SERVICES L.L.C.

By:
     Authorized Signature


<PAGE>




                    Form of Reverse Side of Right Certificate


                               FORM OF ASSIGNMENT

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


         FOR VALUE  RECEIVED  ___________________________________  hereby sells,
assigns and transfers  unto  ___________________________________________________
(Please print name and address of transferee) this Right  Certificate,  together
with  all  right,  title  and  interest  therein,  and does  hereby  irrevocably
constitute  and  appoint   _________________   _________________________________
Attorney,  to  transfer  the  within  Right  Certificate  on  the  books  of the
within-named Company, with full power of substitution.


Dated:________________________



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


Signature(s) Guaranteed:

SIGNATURE(S)  SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR  INSTITUTION (BANKS,
STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN
AN APPROVED  SIGNATURE  GUARANTEE  MEDALLION  PROGRAM),  PURSUANT TO S.E.C. RULE
17Ad-15

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

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


                                               ---------------------------------
                                                          Signature
                ----------------------------------------------------------------
                Form of Reverse Side of Right Certificate--continued

                          FORM OF ELECTION TO PURCHASE

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

To _______________________:

         The undersigned  hereby  irrevocably  elects to exercise  _____________
Rights  represented by this Right  Certificate to purchase the Preferred  Shares
issuable  upon the exercise of such Rights and requests  that  certificates  for
such Preferred Shares 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 Right
Certificate,  a new Right  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(s) Guaranteed:

SIGNATURE(S)  SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR  INSTITUTION (BANKS,
STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN
AN APPROVED  SIGNATURE  GUARANTEE  MEDALLION  PROGRAM),  PURSUANT TO S.E.C. RULE
17Ad-15


<PAGE>



              Form of Reverse Side of Right Certificate--continued


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


         The  undersigned  hereby  certifies  that the Rights  evidenced by this
Right  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  Forms of Assignment  and Election must
conform to the name as written upon the face of this Right  Certificate in every
particular, without alteration or any change whatsoever.

         In  the  event  the  certification  set  forth  above  in the  Form  of
Assignment  or 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 Right  Certificate to be an Acquiring Person or an
Affiliate or  Associate  thereof (as defined in the Rights  Agreement)  and such
Assignment or Election to Purchase will not be honored.




<PAGE>


                                                                       Exhibit C


                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES


         On   September   18,   1998,   the  Board  of   Directors  of  Premisys
Communications,  Inc. (the "Company") declared a dividend of one preferred share
purchase right (a "Right") for each outstanding share of common stock, par value
$0.01 per share (the "Common Shares"),  of the Company.  The dividend is payable
to stockholders  of record on October 5, 1998 (the "Record Date").  In addition,
one Right shall be issued with each Common  Share that becomes  outstanding  (i)
between  the  Record  Date  and  the  earliest  of the  Distribution  Date,  the
Redemption Date and the Final  Expiration Date (as such terms are defined in the
Agreement) or (ii) following the  Distribution  Date and prior to the Redemption
Date or Final  Expiration  Date,  pursuant to the  exercise of stock  options or
under any employee  plan or  arrangement  or upon the  exercise,  conversion  or
exchange of other  securities  of the  Corporation,  which options or securities
were  outstanding  prior to the  Distribution  Date.  Each  Right  entitles  the
registered  holder to purchase from the Company one  one-hundredth of a share of
Series A Junior  Participating  Preferred  Stock, par value $0.01 per share (the
"Preferred Shares"),  of the Company, at a price of $80.00 per one one-hundredth
of a  Preferred  Share  (the  "Purchase  Price"),  subject  to  adjustment.  The
description  and terms of the  Rights are set forth in a Rights  Agreement  (the
"Rights  Agreement")  between the Company and Chase Mellon Shareholder  Services
L.L.C., as Rights Agent (the "Rights Agent").

         Until  the  earlier  to  occur  of  (i)  10  days  following  a  public
announcement  or  disclosure  that a person or group of affiliated or associated
persons (an "Acquiring  Person"),  has acquired beneficial ownership of 20% (the
"Designated  Percentage")  or more of the  outstanding  Common Shares 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  announcement  of an intention to make a tender offer or exchange
offer the  consummation  of which would result in a person or group  becoming an
Acquiring  Person  (the  earlier of such dates  being  called the  "Distribution
Date"),  the Rights will be  evidenced,  with respect to any of the Common Share
certificates   outstanding   as  of  the  Record  Date,  by  such  Common  Share
certificates with a copy of this Summary of Rights attached  thereto.  No person
shall  become  an  Acquiring  Person if the Board of  Directors  of the  Company
determines  in good  faith  that a Person who would  otherwise  be an  Acquiring
Person has become such inadvertently, and such Person as promptly as practicable
takes such  actions as may be  necessary  so that such Person would no longer be
considered an Acquiring Person.

         The Rights Agreement  provides that,  until the Distribution  Date, the
Rights  will be  transferred  with and only with the  Common  Shares.  Until the
Distribution  Date (or earlier  redemption  or  expiration  of the Rights),  new
Common Share  certificates  issued after the Record Date,  upon  transfer or new
issuance of Common  Shares,  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 Shares 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 Shares  represented  by such
certificate.  As soon as practicable  following the Distribution Date,  separate
certificates  evidencing  the Rights  ("Right  Certificates")  will be mailed to
holders  of record of the  Common  Shares  as of the  Close of  Business  on the
Distribution Date and such separate Right  Certificates  alone will evidence the
Rights.

         The Rights are not exercisable until the Distribution  Date. The Rights
will expire on  September  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 Preferred Shares 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
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or  warrants  to  subscribe  for or  purchase  Preferred  Shares at a price,  or
securities  convertible into Preferred Shares with a conversion price, less than
the  then  current  market  price of the  Preferred  Shares  or  (iii)  upon the
distribution to holders of the Preferred  Shares of evidences of indebtedness or
assets  (excluding  regular  periodic  cash  dividends  paid out of  earnings or
retained  earnings or dividends  payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).

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

         Preferred  Shares  purchasable  upon exercise of the Rights will not be
redeemable.  Each  Preferred  Share will be  entitled  to a  quarterly  dividend
payment of 100 times the  dividend  declared per Common  Share.  In the event of
liquidation,  each Preferred Share will be entitled to a $1.00  preference,  and
thereafter the holders of the Preferred  Shares will be entitled to an aggregate
payment of 100 times the aggregate payment made per Common Share. Each Preferred
Share will have 100 votes,  voting together with the Common Shares.  Finally, in
the event of any merger,  consolidation  or other  transaction  in which  Common
Shares are exchanged, each Preferred Share will be entitled to receive 100 times
the amount  received per Common  Share.  These rights are protected by customary
antidilution provisions.

         Because of the nature of the Preferred  Shares'  dividend,  liquidation
and voting rights,  the value of the one  one-hundredth  interest in a Preferred
Share  purchasable  upon exercise of each Right should  approximate the value of
one Common Share.

         In the event that any person  becomes an Acquiring  Person,  unless the
event causing the Designated  Percentage  threshold to be crossed and the Person
to thereby become an Acquiring Person is a merger, acquisition or other business
combination described in the next paragraph,  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
Common Shares having a market value of two times the exercise price of the Right
on the terms and  conditions set forth in the Rights  Agreement.  If the Company
does not have authorized but unissued  Common Shares  sufficient to satisfy such
obligation  to issue  Common  Shares,  the Company is  obligated to deliver upon
payment of the exercise  price of a Right an amount of cash or other  securities
equivalent in value to the Common Shares issuable upon exercise of a Right.

         In the event that any person or group  becomes an Acquiring  Person and
the  Company  merges  into or  engages  in certain  other  business  combination
transactions with an Acquiring Person, or 50% or more of its consolidated assets
or earning power are sold to an Acquiring Person,  each holder of a Right, other
than Rights  beneficially owned by an Acquiring Person, will thereafter have the
right to receive,  upon the exercise  thereof at the then current exercise price
of the Right,  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 Right.

         At any time after any person  becomes an Acquiring  Person and prior to
the acquisition by such person or group of 50% or more of the outstanding Common
Shares,  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 Common Share,  or one  one-hundredth  of a
Preferred  Share (or of a share of a class or series of the Company's  preferred
stock having equivalent rights, preferences and privileges),  per Right (subject
to adjustment).

         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  Preferred  Shares will be issued (other than
fractions  which are  integral  multiples  of one  one-hundredth  of a Preferred
Share,  which may, at the  election of the Company,  be evidenced by  depository
receipts) and in lieu  thereof,  an adjustment in cash will be made based on the
market price of the  Preferred  Shares on the last trading day prior to the date
of exercise.

         At any  time  prior  to such  time as a  person  or  group  becomes  an
Acquiring Person, the Board of Directors of the Company may redeem the Rights in
whole, but not in part, at a price of $0.001 per Right (the "Redemption Price").
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.  After the period for redemption of the Rights has expired, the Board
may not amend the Rights  Agreement to extend the period for  redemption  of the
Rights. 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 terms of the Rights may be amended by a resolution  of the Board of
Directors without the consent of the holders of the Rights, except that from and
after such time as any  person or group  becomes an  Acquiring  Person,  no such
amendment may adversely affect the interests of the holders of the Rights (other
than an Acquiring Person).

         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.

         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 dated
September 22, 1998. 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.








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