ACT NETWORKS INC
S-8, 1998-01-12
COMPUTER COMMUNICATIONS EQUIPMENT
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<PAGE>   1
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 12, 1998
                                                           REGISTRATION NO. 333-

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

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933

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

                               ACT NETWORKS, INC.
             (Exact name of Registrant as specified in its charter)

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

           DELAWARE                                       77-0396887
 (State or other jurisdiction                  (IRS Employer Identification No.)
of incorporation or organization)

                                 188 CAMINO RUIZ
                           CAMARILLO, CALIFORNIA 93012
               (Address of principal executive offices) (Zip code)
                         ------------------------------
                            1997 STOCK INCENTIVE PLAN

                            (Full title of the Plan)

                         ------------------------------
                                   MARTIN SHUM
                             CHIEF EXECUTIVE OFFICER
                               ACT NETWORKS, INC.
                  188 CAMINO RUIZ, CAMARILLO, CALIFORNIA 93012
                                 (805) 388-2474
          (Telephone number, including area code, of agent for service)


                         CALCULATION OF REGISTRATION FEE
================================================================================
<TABLE>
<CAPTION>

                                                    Proposed            Proposed
      Title of                                       Maximum             Maximum
     Securities                 Amount              Offering            Aggregate          Amount of
        to be                   to be                Price               Offering         Registration
     Registered              Registered(1)          per Share             Price                Fee
     ----------              -------------          ---------             -----                ---
<S>                        <C>                      <C>                <C>                   <C> 
Common Stock, 
$0.001 par value            460,000 shares          $9.00(2)           $4,140,000(2)         $1,221
</TABLE>

================================================================================
(1) This Registration Statement shall also cover any additional shares of Common
    Stock which become issuable under the 1997 Stock Incentive Plan or by reason
    of any stock dividend, stock split, recapitalization or any other similar
    transaction without receipt of consideration which results in an increase in
    the number of outstanding shares of Registrant's Common Stock.

(2) Calculated solely for purposes of this offering under Rule 457(h) of the
    Securities Act of 1933, as amended, on the basis of the average of the high
    and low selling prices per share of Common Stock of ACT Networks, Inc. on
    January 7, 1998, as reported on the Nasdaq National Market.


<PAGE>   2



                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE

    ACT Networks, Inc. (the "Registrant") hereby incorporates by reference into
this Registration Statement the following documents previously filed with the
Securities and Exchange Commission (the "SEC"):

    (a)    The Registrant's Annual Report on Form 10-K for the fiscal year ended
           June 30, 1997, filed with the SEC on September 30, 1997;

    (b)    The Registrant's Quarterly Report on Form 10-Q for the fiscal quarter
           ended September 30, 1997, filed with the SEC on November 14, 1997;

    (c)    The Registrant's Current Report on Form 8-K, as amended, filed with 
           the SEC on August 11, 1997; and

    (d)    The Registrant's Registration Statement No. 000-25740 on Form 8-A, as
           amended, filed with the SEC on March 23, 1995 in which the terms,
           rights and provisions applicable to the Registrant's Common Stock are
           described.

    All reports and definitive proxy or information statements filed pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 (the
"1934 Act") after the date of this Registration Statement and prior to the
filing of a post-effective amendment which indicates that all securities offered
hereby have been sold or which deregisters all securities then remaining unsold
shall be deemed to be incorporated by reference into this Registration Statement
and to be a part hereof from the date of filing of such documents. Any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this
Registration Statement to the extent that a statement contained herein or in any
subsequently filed document which also is deemed to be incorporated by reference
herein modifies or supersedes such statement. Any such statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Registration Statement.


ITEM 4.  DESCRIPTION OF SECURITIES

    Not applicable.


ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL

    Not applicable.


ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

    Under Section 145 of the Delaware General Corporation Law, the Registrant
has broad powers to indemnify its directors and officers against liabilities
they may incur in such capacities, including liabilities under the Securities
Act of 1933, as amended (the "1933 Act"). The Registrant's Bylaws (the "Bylaws")
provide that the Registrant shall indemnify its directors and officers if such
officer or director acted (i) in good faith, (ii) in a manner reasonably
believed to be in or not opposed to the best interests of the Registrant, and
(iii) with respect to any criminal action or proceeding, had no reasonable cause
to believe such conduct was unlawful. The Registrant believes that
indemnification under its Bylaws covers at least negligence and gross
negligence, and requires the Registrant to advance litigation expenses in the
case of stockholder derivative actions

                                      II-2

<PAGE>   3



or other actions, against an undertaking by the directors and officers to repay
such advances if it is ultimately determined that the director is not entitled
to indemnification. The Bylaws further provide that rights conferred under such
Bylaws shall not be deemed to be exclusive of any other right such persons may
have or acquire under any agreement, vote of stockholders or disinterested
directors, or otherwise.

    In addition, the Registrant's Certificate of Incorporation (the "Certificate
of Incorporation") provides that, pursuant to Delaware law, none of its
directors shall be liable for monetary damages for breach of his or her
fiduciary duty of care to the Registrant and its stockholders. This provision in
the Certificate of Incorporation does not eliminate the duty of care, and in
appropriate circumstances equitable remedies such as injunctive or other forms
of non-monetary relief will remain available under Delaware law. In addition,
each director will continue to be subject to liability for breach of the
director's duty of loyalty to the Registrant for acts or omissions not in good
faith or involving intentional misconduct, for knowing violations of law, for
actions leading to improper personal benefit to the director, and for payment of
dividends or approval of stock repurchases or redemptions that are unlawful
under Delaware law. The provision also does not affect a director's
responsibilities under any other law, such as the federal securities laws or
state or federal environmental laws. The Certificate of Incorporation further
provides that the Registrant shall indemnify its directors and officers to the
fullest extent permitted by law and requires the Registrant to advance
litigation expenses in the case of stockholder derivative actions or other
actions, against an undertaking by the director to repay such advances if it is
ultimately determined that the director is not entitled to indemnification. The
Certificate of Incorporation also provides that rights conferred under such
Certificate of Incorporation shall not be deemed to be exclusive of any other
right such persons may have or acquire under any statute, the Certificate of
Incorporation, the Bylaws, agreement, vote of stockholders or disinterested
directors, or otherwise.

    The Registrant has obtained a liability insurance policy for the officers
and directors that, subject to certain limitations, terms and conditions, will
insure them against losses arising from wrongful acts (as defined by the policy)
in their capacity as directors or officers.

    In addition, the Registrant has entered into agreements to indemnify its
directors and certain of its officers in addition to the indemnification
provided for in the Certificate of Incorporation and Bylaws. These agreements,
among other things, indemnify the Registrant's directors and certain of its
officers for certain expenses (including attorneys fees), judgments, fines and
settlement amounts incurred by such person in any action or proceeding,
including any action by or in the right of the Registrant, on account of
services as a director or officer of the Registrant or as a director or officer
of any subsidiary of the Registrant, or as a director or officer of any other
company or enterprise that the person provides services to at the request of the
Registrant.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED

    Not applicable.


ITEM 8.    EXHIBITS

Exhibit No.       Exhibit
- -----------       -------

    4      Instruments Defining Rights of Stockholders. Reference is made to
           Registrant's Registration Statement No. 000-25740 on Form 8-A, as
           amended, which is incorporated herein by reference pursuant to Item
           3(d) of this Registration Statement.

    5      Opinion and Consent of Brobeck, Phleger & Harrison LLP.

    23.1   Consent of Ernst & Young LLP, Independent Public Accountants.

    23.2   Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit 5.

    24     Power of Attorney. Reference is made to page II-5 of this
           Registration Statement.

    99.1   1997 Stock Incentive Plan.

    99.2   Form of Notice of Grant of Stock Option - Installment Option.

                                      II-3

<PAGE>   4



    99.3   Form of Stock Option Agreement - Installment Option.

    99.4   Notice of Grant of Stock Option - Immediately Exercisable Option

    99.5   Stock Option Agreement - Immediately Exercisable Option

    99.6   Form of Addendum to Stock Option Agreement (Limited Stock
           Appreciation Rights).

    99.7   Form of Addendum to Stock Option Agreement (Involuntary Termination
           following Change in Control).

    99.8   Stock Purchase Agreement

    99.9   Addendum to Stock Purchase Agreement (Involuntary Termination
           Following Change in Control)

    99.10  Automatic Notice of Initial Grant

    99.11  Automatic Notice of Annual Grant

    99.12  Automatic Stock Option Agreement

ITEM 9.  UNDERTAKINGS

    A. Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the indemnification provisions summarized in Item 6, or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act, and is, therefore, unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer,
or controlling person of the Registrant in the successful defense of any action,
suit or proceeding) is asserted by such director, officer or controlling person
in connection with the securities being registered hereunder, the Registrant
will, unless in the opinion of its counsel the matter has been settled by
controlling precedent, submit to a court of appropriate jurisdiction the
question of whether such indemnification by it is against public policy as
expressed in the Securities Act and will be governed by the final adjudication
of such issue.

    B. The undersigned Registrant hereby undertakes: (1) to file, during any
period in which offers or sales are being made, a post-effective amendment to
this Registration Statement (i) to include any prospectus required by Section
10(a)(3) of the 1933 Act, (ii) to reflect in the prospectus any facts or events
arising after the effective date of this Registration Statement (or the most
recent post-effective amendment thereof) which, individually or in the
aggregate, represent a fundamental change in the information set forth in this
Registration Statement and (iii) to include any material information with
respect to the plan of distribution not previously disclosed in this
Registration Statement or any material change to such information in this
Registration Statement; provided, however, that clauses (1)(i) and (1)(ii) shall
not apply if the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed by the
Registrant pursuant to Section 13 or Section 15(d) of the 1934 Act that are
incorporated by reference into this Registration Statement; (2) that for the
purpose of determining any liability under the 1933 Act each such post-effective
amendment shall be deemed to be a new registration statement relating to the
securities offered therein and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof; and (3) to remove
from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the Registrant's 1997
Stock Incentive Plan.

    C. The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the 1933 Act, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference into this Registration Statement shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.


                                               II-4

<PAGE>   5



                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Camarillo, State of California on January 12, 1998.


                                                ACT NETWORKS, INC.


                                                By: /s/ Martin Shum
                                                   -----------------------------
                                                    Martin Shum
                                                    Chief Executive Officer
                                                    and Chairman of the Board



                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

         That the undersigned officers and directors of ACT Networks, Inc., a
Delaware corporation, do hereby constitute and appoint Martin Shum and Melvin L.
Flowers and each of them, the lawful attorneys-in-fact and agents, with full
power and authority to do any and all acts and things and to execute any and all
instruments which said attorneys and agents, or either one of them, determine
may be necessary or advisable or required to enable said corporation to comply
with the Securities Act of 1933, as amended, and any rules or regulation or
requirements of the Securities and Exchange Commission in connection with this
Registration Statement. Without limiting the generality of the foregoing power
and authority, the powers granted include the power and authority to sign the
names of the undersigned officers and directors in the capacities indicated
below to this Registration Statement, to any and all amendments, both
pre-effective and post-effective, and supplements to this Registration Statement
and to any and all instruments or documents filed as part of or in conjunction
with this Registration Statement or amendments or supplements thereto, and each
of the undersigned hereby ratifies and confirms all that said attorneys and
agents, or either one of them, shall do or cause to be done by virtue hereof.
This Power of Attorney may be signed in several counterparts.

         IN WITNESS WHEREOF, each of the undersigned has executed this Power of
Attorney as of the date indicated.

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed below by the following persons in
the capacities and on the dates indicated.

<TABLE>
<CAPTION>

Signatures                   Title                             Date
- ----------                   -----                             ----
<S>                  <C>                                  <C>

/s/ Martin Shum      Chief Executive Officer              January 12, 1998
- -------------------  and Chairman of the Board
Martin Shum          (Principal Executive Officer)
</TABLE>


                                      II-5

<PAGE>   6

<TABLE>
<CAPTION>

Signatures                                 Title                        Date
- ----------                                 -----                        ----
<S>                                 <C>                            <C>  


/s/ Melvin L. Flowers               Vice President Finance &       January 12, 1998
- --------------------------------    Administration and Chief 
Melvin L. Flowers                   Financial Officer (Principal 
                                    Financial and Accounting 
                                    Officer)

/s/ Brig. Gen. Harold R. Johnson    Director                       January 12, 1998
- --------------------------------
Brig. Gen. Harold R. Johnson



/s/ William Ambrose                 Director                       January 12, 1998
- --------------------------------
William Ambrose



/s/ Archie J. McGill                Director                       January 12, 1998
- --------------------------------
Archie J. McGill



/s/ Frederick Gluck                 Director                       January 12, 1998
- --------------------------------
Frederick Gluck

</TABLE>





                                      II-6


<PAGE>   7



                                  EXHIBIT INDEX
<TABLE>
<CAPTION>

Exhibit
   No.       Exhibit
   ---       -------
<S>          <C> 
    4        Instruments Defining Rights of Stockholders. Reference is made to
             Registrant's Registration Statement No. 000-25740 on Form 8-A, as
             amended, which is incorporated herein by reference pursuant to Item
             3(d) of this Registration Statement.

    5        Opinion and Consent of Brobeck, Phleger & Harrison LLP.

    23.1     Consent of Ernst & Young LLP, Independent Public Accountants.

    23.2     Consent of Brobeck, Phleger & Harrison LLP is contained in Exhibit
             5.

    24       Power of Attorney. Reference is made to page II-5 of this
             Registration Statement.
  
    99.1     1997 Stock Incentive Plan.

    99.2     Form of Notice of Grant of Stock Option - Installment Option.

    99.3     Form of Stock Option Agreement - Installment Option.

    99.4     Notice of Grant of Stock Option - Immediately Exercisable Option

    99.5     Stock Option Agreement - Immediately Exercisable Option

    99.6     Form of Addendum to Stock Option Agreement (Limited Stock
             Appreciation Rights).
  

    99.7     Form of Addendum to Stock Option Agreement (Involuntary Termination
             following Change in Control).

    99.8     Stock Purchase Agreement 99.9 Addendum to Stock Purchase Agreement
             (Involuntary Termination Following Change in Control)
  
    99.10    Automatic Notice of Initial Grant

    99.11    Automatic Notice of Annual Grant

    99.12    Automatic Stock Option Agreement
</TABLE>



<PAGE>   1




                                                                       EXHIBIT 5

                   Opinion of Brobeck, Phleger & Harrison LLP


                                January 12, 1998



ACT Networks, Inc.
188 Camino Ruiz
Camarillo, California 93012

         Re:    ACT Networks, Inc. (the "Company")
                Registration Statement for Registration
                of 460,000 Shares of Common Stock


Ladies and Gentlemen:

         We refer to your registration on Form S-8 (the "Registration
Statement") under the Securities Act of 1933, as amended, of 460,000 shares of
common stock ("Common Stock") of ACT Networks, Inc. (the "Company") for issuance
under the Company's 1997 Stock Incentive Plan (the "Plan"). We advise you that,
in our opinion, when such shares have been issued and sold pursuant to the
applicable provisions of the Plan and in accordance with the Registration
Statement, such shares will be validly issued, fully paid and non-assessable
shares of the Company's Common Stock.

         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement.

                                      Very truly yours,


                                      /s/ Brobeck, Phleger & Harrison LLP
                                      -----------------------------------
                                      BROBECK, PHLEGER & HARRISON LLP




<PAGE>   1
                                                                EXHIBIT 23.1

                        Consent of Independent Auditors

We consent to the incorporation by reference in the Registration Statement
(Form S-8) pertaining to the registration of options to purchase 460,000 shares
of common stock and the registration of 460,000 shares of common stock under
the 1997 stock incentive plan of ACT Networks, Inc. of our report dated July
29, 1997 with respect to the consolidated financial statements and schedule of
ACT Networks, Inc. included in the Annual Report (Form 10-K) for the year ended
June 30, 1997, filed with the Securities and Exchange Commission.


                                                 /s/ ERNST & YOUNG
 
                                                 ERNST & YOUNG

Woodland Hills, California
January 8, 1998

<PAGE>   1
                               ACT NETWORKS, INC.
                            1997 STOCK INCENTIVE PLAN


                                   ARTICLE ONE

                               GENERAL PROVISIONS


       I.      PURPOSE OF THE PLAN

               This 1997 Stock Incentive Plan is intended to promote the
interests of ACT Networks, Inc., a Delaware corporation, by providing eligible
persons with the opportunity to acquire a proprietary interest, or otherwise
increase their proprietary interest, in the Corporation as an incentive for them
to remain in the service of the Corporation.

               This Plan shall supplement the authorized share reserve under the
Corporation's 1995 Stock Option/Stock Issuance Plan (the "1995 Plan"), and share
issuances under this 1997 Plan shall not reduce or otherwise affect the number
of shares of the Corporation's common stock available for issuance under the
1995 Plan. In addition, share issuances under the 1995 Stock Plan shall not
reduce or otherwise affect the number of shares of the Corporation's common
stock available for issuance under this Plan.

               Capitalized terms shall have the meanings assigned to such terms
in the attached Appendix.

      II.      STRUCTURE OF THE PLAN

               A.     The Plan shall be divided into three separate equity
                      programs:

                           (i) the Discretionary Option Grant Program under
        which eligible persons may, at the discretion of the Plan Administrator,
        be granted options to purchase shares of Common Stock,

                          (ii) the Stock Issuance Program under which eligible
        persons may, at the discretion of the Plan Administrator, be issued
        shares of Common Stock directly, either through the immediate purchase
        of such shares or as a bonus for services rendered the Corporation (or
        any Parent or Subsidiary), and

                         (iii) the Automatic Option Grant Program under which
        Eligible Directors shall automatically receive option grants at periodic
        intervals to purchase shares of Common Stock.




<PAGE>   2





               B. The provisions of Articles One and Five shall apply to all
equity programs under the Plan and shall accordingly govern the interests of all
persons under the Plan.

     III.      ADMINISTRATION OF THE PLAN

               A. The Primary Committee shall have sole and exclusive authority
to administer the Discretionary Option Grant and Stock Issuance Programs with
respect to all Section 16 Insiders. Administration of the Discretionary Option
Grant and Stock Issuance Programs with respect to all other persons eligible to
participate in those programs may, at the Board's discretion, be vested in the
Primary Committee or a Secondary Committee, or the Board may retain the power to
administer those programs with respect to all such persons.

               B. Members of the Primary Committee or any Secondary Committee
shall serve for such period of time as the Board may determine and may be
removed by the Board at any time. The Board may also at any time terminate the
functions of any Secondary Committee and reassume all powers and authority
previously delegated to such committee.

               C. Each Plan Administrator shall, within the scope of its
administrative functions under the Plan, have full power and authority (subject
to the provisions of the Plan) to establish such rules and regulations as it may
deem appropriate for proper administration of the Discretionary Option Grant and
Stock Issuance Programs and to make such determinations under, and issue such
interpretations of, the provisions of such programs and any outstanding options
or stock issuances thereunder as it may deem necessary or advisable. Decisions
of the Plan Administrator within the scope of its administrative functions under
the Plan shall be final and binding on all parties who have an interest in the
Discretionary Option Grant or Stock Issuance Program under its jurisdiction or
any option or stock issuance thereunder.

               D. Service on the Primary Committee or the Secondary Committee
shall constitute service as a Board member, and members of each such committee
shall accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee. No member of the Primary Committee
or the Secondary Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

               E. Administration of the Automatic Option Grant Program shall be
self-executing in accordance with the terms of that program, and no Plan
Administrator shall exercise any discretionary functions with respect to option
grants made thereunder.


                                       2.



<PAGE>   3



     IV.       ELIGIBILITY

               A. The persons eligible to participate in the Discretionary
Option Grant and Stock Issuance Programs are as follows:

                           (i) Employees,

                          (ii) non-employee members of the Board or the board of
        directors of any Parent or Subsidiary, and

                         (iii) consultants and other independent advisors who
        provide services to the Corporation (or any Parent or Subsidiary).

               B. Each Plan Administrator shall, within the scope of its
administrative jurisdiction under the Plan, have full authority (subject to the
provisions of the Plan) to determine, (i) with respect to the option grants
under the Discretionary Option Grant Program, which eligible persons are to
receive option grants, the time or times when such option grants are to be made,
the number of shares to be covered by each such grant, the status of the granted
option as either an Incentive Option or a Non-Statutory Option, the time or
times when each option is to become exercisable, the vesting schedule (if any)
applicable to the option shares and the maximum term for which the option is to
remain outstanding and (ii) with respect to stock issuances under the Stock
Issuance Program, which eligible persons are to receive stock issuances, the
time or times when such issuances are to be made, the number of shares to be
issued to each Participant, the vesting schedule (if any) applicable to the
issued shares and the consideration to be paid for such shares.

               C. The Plan Administrator shall have the absolute discretion
either to grant options in accordance with the Discretionary Option Grant
Program or to effect stock issuances in accordance with the Stock Issuance
Program.

               D. The individuals eligible to participate in the Automatic
Option Grant Program shall be limited to (i) those individuals who are first
elected or appointed as non-employee Board members after the Effective Date,
whether through appointment by the Board or election by the Corporation's
stockholders, and (ii) those individuals who continue to serve as non-employee
Board members after one or more Annual Stockholders Meetings, beginning with the
1997 Annual Meeting. A non-employee Board member who has previously been in the
employ of the Corporation (or any Parent or Subsidiary) shall not be eligible to
receive an option grant under the Automatic Option Grant Program at the time he
or she first becomes a non-employee Board member, but shall be eligible to
receive periodic option grants under the

                                       3.



<PAGE>   4



Automatic Option Grant Program while he or she continues to serve as a
non-employee Board member. In no event, however, shall any non-employee Board
member who is, directly or indirectly, a 5% Stockholder or who is otherwise
affiliated with, or a representative of, a 5% Stockholder be eligible to receive
any option grants under the Automatic Option Grant Program.

       V.      STOCK SUBJECT TO THE PLAN

               A. The stock issuable under the Plan shall be shares of
authorized but unissued or reacquired Common Stock, including shares repurchased
by the Corporation on the open market. The maximum number of shares of Common
Stock reserved for issuance over the term of the Plan shall not exceed 460,000
shares. Such share reserve shall be in addition to the shares of Common Stock
reserved for issuance under the 1995 Plan, and share issuances under the 1995
Plan shall have no effect upon the number of shares of Common Stock which remain
available issuance under this Plan.

               B. No one person participating in the Plan may receive options,
separately exercisable stock appreciation rights and direct stock issuances for
more than 100,000 shares of Common Stock in the aggregate per calendar year,
beginning with the 1997 calendar year.

               C. Shares of Common Stock subject to outstanding options under
this Plan shall be available for subsequent issuance under the Plan to the
extent those options expire or terminate for any reason prior to exercise in
full. Unvested shares issued under the Plan and subsequently cancelled or
repurchased by the Corporation, at the original issue price paid per share,
pursuant to the Corporation's repurchase rights under the Plan, shall be added
back to the number of shares of Common Stock reserved for issuance under the
Plan and shall accordingly be available for reissuance through one or more
subsequent option grants or direct stock issuances under the Plan. However,
should the exercise price of an option under the Plan be paid with shares of
Common Stock or should shares of Common Stock otherwise issuable under the Plan
be withheld by the Corporation in satisfaction of the withholding taxes incurred
in connection with the exercise of an option or the vesting of a stock issuance
under the Plan, then the number of shares of Common Stock available for issuance
under the Plan shall be reduced by the gross number of shares for which the
option is exercised or which vest under the stock issuance, and not by the net
number of shares of Common Stock issued to the holder of such option or stock
issuance.

               D. Should any change be made to the Common Stock by reason of any
stock split, stock dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Common Stock as a class
without the Corporation's receipt of consideration, appropriate adjustments
shall be made to (i) the maximum number and/or class of securities issuable
under the Plan, (ii) the number and/or class of securities for which any one
person may be granted stock options, separately exercisable stock appreciation
rights and direct stock issuances under this Plan per calendar year, (iii) the
number and/or class of securities for

                                       4.



<PAGE>   5



which automatic option grants are to be subsequently made per Eligible Director
under the Automatic Option Grant Program and (iv) the number and/or class of
securities and the exercise price per share in effect under each outstanding
option (including any option incorporated from the Predecessor Plans) in order
to prevent the dilution or enlargement of benefits thereunder. The adjustments
determined by the Plan Administrator shall be final, binding and conclusive.


                                       5.



<PAGE>   6



                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM


       I.      OPTION TERMS

               Each option shall be evidenced by one or more documents in the
form approved by the Plan Administrator; provided, however, that each such
document shall comply with the terms specified below. Each document evidencing
an Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

               A.     Exercise Price.

                      1. The exercise price per share shall be fixed by the Plan
Administrator but shall not be less than eighty-five percent (85%) of the Fair
Market Value per share of Common Stock on the option grant date.

                      2. The exercise price shall become immediately due upon
exercise of the option and shall, subject to the provisions of Section I of
Article Five and the documents evidencing the option, be payable in one or more
of the forms specified below:

                          (i) cash or check made payable to the Corporation,

                          (ii) shares of Common Stock held for the requisite
        period necessary to avoid a charge to the Corporation's earnings for
        financial reporting purposes and valued at Fair Market Value on the
        Exercise Date, or

                         (iii) to the extent the option is exercised for vested
        shares, through a special sale and remittance procedure pursuant to
        which the Optionee shall concurrently provide irrevocable instructions
        to (a) a Corporation-designated brokerage firm to effect the immediate
        sale of the purchased shares and remit to the Corporation, out of the
        sale proceeds available on the settlement date, sufficient funds to
        cover the aggregate exercise price payable for the purchased shares plus
        all applicable Federal, state and local income and employment taxes
        required to be withheld by the Corporation by reason of such exercise
        and (b) the Corporation to deliver the certificates for the purchased
        shares directly to such brokerage firm in order to complete the sale
        transaction.

               Except to the extent such sale and remittance procedure is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.


                                       6.



<PAGE>   7



               B. Exercise and Term of Options. Each option shall be exercisable
at such time or times, during such period and for such number of shares as shall
be determined by the Plan Administrator and set forth in the documents
evidencing the option. However, no option shall have a term in excess of ten
(10) years measured from the option grant date.

               C.     Effect of Termination of Service.

                      1. The following provisions shall govern the exercise of
any options held by the Optionee at the time of cessation of Service or death:

                           (i) Any option outstanding at the time of the
        Optionee's cessation of Service for any reason shall remain exercisable
        for such period of time thereafter as shall be determined by the Plan
        Administrator and set forth in the documents evidencing the option, but
        no such option shall be exercisable after the expiration of the option
        term.

                          (ii) Any option exercisable in whole or in part by the
        Optionee at the time of death may be subsequently exercised by the
        personal representative of the Optionee's estate or by the person or
        persons to whom the option is transferred pursuant to the Optionee's
        will or in accordance with the laws of descent and distribution.

                         (iii) During the applicable post-Service exercise
        period, the option may not be exercised in the aggregate for more than
        the number of vested shares for which the option is exercisable on the
        date of the Optionee's cessation of Service. Upon the expiration of the
        applicable exercise period or (if earlier) upon the expiration of the
        option term, the option shall terminate and cease to be outstanding for
        any vested shares for which the option has not been exercised. However,
        the option shall, immediately upon the Optionee's cessation of Service,
        terminate and cease to be outstanding with respect to any shares in
        which the Optionee is not vested on the date of such cessation of
        Service.

                          (iv) Should the Optionee's Service be terminated for
        Misconduct, then all outstanding options held by the Optionee shall
        terminate immediately and cease to be outstanding.

                      2. The Plan Administrator shall have the discretion,
exercisable either at the time an option is granted or at any time while the
option remains outstanding, to:

                           (i) extend the period of time for which the option is
        to remain exercisable following the Optionee's cessation of Service from
        the period otherwise in effect for that option to such greater period of
        time as the Plan

                                       7.



<PAGE>   8



        Administrator shall deem appropriate, but in no event beyond the 
        expiration of the option term, and/or

                          (ii) permit the option to be exercised, during the
        applicable post-Service exercise period, not only with respect to the
        number of vested shares of Common Stock for which such option is
        exercisable at the time of the Optionee's cessation of Service but also
        with respect to one or more additional installments in which the
        Optionee would have vested under the option had the Optionee continued
        in Service.

               D. Stockholder Rights. The holder of an option shall have no
stockholder rights with respect to the shares subject to the option until such
person shall have exercised the option, paid the exercise price and become a
holder of record of the purchased shares.

               E. Repurchase Rights. The Plan Administrator shall have the
discretion to grant options which are exercisable for unvested shares of Common
Stock. Should the Optionee cease Service while holding such unvested shares, the
Corporation shall have the right to repurchase, at the exercise price paid per
share, any or all of those unvested shares. The terms upon which such repurchase
right shall be exercisable (including the period and procedure for exercise and
the appropriate vesting schedule for the purchased shares) shall be established
by the Plan Administrator and set forth in the document evidencing such
repurchase right.

               F. Limited Transferability of Options. During the lifetime of the
Optionee, Incentive Options shall be exercisable only by the Optionee and shall
not be assignable or transferable other than by will or by the laws of descent
and distribution following the Optionee's death. Non-Statutory Options shall be
subject to the same transfer restrictions, except that a Non-Statutory Option
may, in connection with the Optionee's estate plan, be assigned in whole or in
part during the Optionee's lifetime to one or more members of the Optionee's
immediate family or to a trust established exclusively for one or more such
family members. The assigned portion may only be exercised by the person or
persons who acquire a proprietary interest in the option pursuant to the
assignment. The terms applicable to the assigned portion shall be the same as
those in effect for the option immediately prior to such assignment and shall be
set forth in such documents issued to the assignee as the Plan Administrator may
deem appropriate.

      II.      INCENTIVE OPTIONS

               The terms specified below shall be applicable to all Incentive
Options. Except as modified by the provisions of this Section II, all the
provisions of Articles One, Two and Five shall be applicable to Incentive
Options. Options which are specifically designated as Non-Statutory Options when
issued under the Plan shall not be subject to the terms of this Section II.

               A. Eligibility. Incentive Options may only be granted to 
Employees.

                                       8.



<PAGE>   9




               B. Exercise Price. The exercise price per share shall not be less
than one hundred percent (100%) of the Fair Market Value per share of Common
Stock on the option grant date.

               C. Dollar Limitation. The aggregate Fair Market Value of the
shares of Common Stock (determined as of the respective date or dates of grant)
for which one or more options granted to any Employee under the Plan (or any
other option plan of the Corporation or any Parent or Subsidiary) may for the
first time become exercisable as Incentive Options during any one (1) calendar
year shall not exceed the sum of One Hundred Thousand Dollars ($100,000). To the
extent the Employee holds two (2) or more such options which become exercisable
for the first time in the same calendar year, the foregoing limitation on the
exercisability of such options as Incentive Options shall be applied on the
basis of the order in which such options are granted.

               D. 10% Stockholder. If any Employee to whom an Incentive Option
is granted is a 10% Stockholder, then the exercise price per share shall not be
less than one hundred ten percent (110%) of the Fair Market Value per share of
Common Stock on the option grant date, and the option term shall not exceed five
(5) years measured from the option grant date.

     III.      CORPORATE TRANSACTION/CHANGE IN CONTROL

               A. In the event of any Corporate Transaction, each outstanding
option shall automatically accelerate so that each such option shall,
immediately prior to the effective date of the Corporate Transaction, become
fully exercisable for all of the shares of Common Stock at the time subject to
such option and may be exercised for any or all of those shares as fully-vested
shares of Common Stock. However, an outstanding option shall NOT so accelerate
if and to the extent: (i) such option is, in connection with the Corporate
Transaction, either to be assumed by the successor corporation (or parent
thereof) or to be replaced with a comparable option to purchase shares of the
capital stock of the successor corporation (or parent thereof) or (ii) such
option is to be replaced with a cash incentive program of the successor
corporation which preserves the spread existing on the unvested option shares at
the time of the Corporate Transaction and provides for subsequent payout in
accordance with the same vesting schedule applicable to those option shares or
(iii) the acceleration of such option is subject to other limitations imposed by
the Plan Administrator at the time of the option grant. The determination of
option comparability under clause (i) above shall be made by the Plan
Administrator, and its determination shall be final, binding and conclusive.

               B. All outstanding repurchase rights shall terminate
automatically, and the shares of Common Stock subject to those terminated rights
shall immediately vest in full, in the event of any Corporate Transaction,
except to the extent: (i) those repurchase rights are to be assigned to the
successor corporation (or parent thereof) in connection with such Corporate

                                       9.



<PAGE>   10



Transaction or (ii) such accelerated vesting is precluded by other limitations
imposed by the Plan Administrator at the time the repurchase right is issued.

               C. Immediately following the consummation of the Corporate
Transaction, all outstanding options shall terminate and cease to be
outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

               D. Each option which is assumed in connection with a Corporate
Transaction shall be appropriately adjusted, immediately after such Corporate
Transaction, to apply to the number and class of securities which would have
been issuable to the Optionee in consummation of such Corporate Transaction had
the option been exercised immediately prior to such Corporate Transaction.
Appropriate adjustments shall also be made to (i) the number and class of
securities available for issuance under the Plan on both an aggregate and per
Optionee basis following the consummation of such Corporate Transaction and (ii)
the exercise price payable per share under each outstanding option, provided the
aggregate exercise price payable for such securities shall remain the same.

               E. Any options which are assumed or replaced in the Corporate
Transaction and do not otherwise accelerate at that time shall automatically
accelerate (and any of the Corporation's outstanding repurchase rights which do
not otherwise terminate at the time of the Corporate Transaction shall
automatically terminate and the shares of Common Stock subject to those
terminated rights shall immediately vest in full) in the event the Optionee's
Service should subsequently terminate by reason of an Involuntary Termination
within eighteen (18) months following the effective date of such Corporate
Transaction. Any options so accelerated shall remain exercisable for
fully-vested shares until the earlier of (i) the expiration of the option term
or (ii) the expiration of the one (1)-year period measured from the effective
date of the Involuntary Termination.

               F. The Plan Administrator shall have the discretion, exercisable
either at the time the option is granted or at any time while the option remains
outstanding, to provide for the automatic acceleration of one or more
outstanding options (and the automatic termination of one or more outstanding
repurchase rights with the immediate vesting of the shares of Common Stock
subject to those rights) upon the Involuntary Termination of the Optionee's
Service within a specified period (not to exceed eighteen (18) months) following
the effective date of a Change in Control. Any options so accelerated shall
remain fully exercisable until the expiration or sooner termination of the
option term.

               G. The portion of any Incentive Option accelerated in connection
with a Corporate Transaction or Change in Control shall remain exercisable as an
Incentive Option only to the extent the applicable One Hundred Thousand Dollar
limitation is not exceeded. To the extent such dollar limitation is exceeded,
the accelerated portion of such option shall be exercisable as a Non-Statutory
Option under the Federal tax laws.

                                       10.



<PAGE>   11




               H. The grant of options under the Discretionary Option Grant
Program shall in no way affect the right of the Corporation to adjust,
reclassify, reorganize or otherwise change its capital or business structure or
to merge, consolidate, dissolve, liquidate or sell or transfer all or any part
of its business or assets.

      IV.      CANCELLATION AND REGRANT OF OPTIONS

               The Plan Administrator shall have the authority to effect, at any
time and from time to time, with the consent of the affected option holders, the
cancellation of any or all outstanding options under the Discretionary Option
Grant Program (including outstanding options incorporated from the Predecessor
Plans) and to grant in substitution new options covering the same or different
number of shares of Common Stock but with an exercise price per share based on
the Fair Market Value per share of Common Stock on the new option grant date.

       V.      STOCK APPRECIATION RIGHTS

               A. The Plan Administrator shall have full power and authority to
grant to selected Optionees tandem stock appreciation rights and/or limited
stock appreciation rights.

               B. The following terms shall govern the grant and exercise of
tandem stock appreciation rights:

                           (i) One or more Optionees may be granted the right,
        exercisable upon such terms as the Plan Administrator may establish, to
        elect between the exercise of the underlying option for shares of Common
        Stock and the surrender of that option in exchange for a distribution
        from the Corporation in an amount equal to the excess of (a) the Fair
        Market Value (on the option surrender date) of the number of shares in
        which the Optionee is at the time vested under the surrendered option
        (or surrendered portion thereof) over (b) the aggregate exercise price
        payable for such shares.

                          (ii) No such option surrender shall be effective
        unless it is approved by the Plan Administrator, either at the time of
        the option surrender or at any earlier time. If the surrender is so
        approved, then the distribution to which the Optionee shall be entitled
        may be made in shares of Common Stock valued at Fair Market Value on the
        option surrender date, in cash, or partly in shares and partly in cash,
        as the Plan Administrator shall in its sole discretion deem appropriate.

                         (iii) If the surrender of an option is rejected by the
        Plan Administrator, then the Optionee shall retain whatever rights the
        Optionee had under the surrendered option (or surrendered portion
        thereof) on the option

                                       11.



<PAGE>   12



        surrender date and may exercise such rights at any time prior to the
        later of (a) five (5) business days after the receipt of the rejection
        notice or (b) the last day on which the option is otherwise exercisable
        in accordance with the terms of the documents evidencing such option,
        but in no event may such rights be exercised more than ten (10) years
        after the option grant date.

               C. The following terms shall govern the grant and exercise of
limited stock appreciation rights:

                           (i) One or more Section 16 Insiders may be granted
        limited stock appreciation rights with respect to their outstanding
        options.

                          (ii) Upon the occurrence of a Hostile Take-Over, each
        such individual holding one or more options with such a limited stock
        appreciation right shall have the unconditional right (exercisable for a
        thirty (30)-day period following such Hostile Take-Over) to surrender
        each such option to the Corporation, to the extent the option is at the
        time exercisable for vested shares of Common Stock. In return for the
        surrendered option, the Optionee shall receive a cash distribution from
        the Corporation in an amount equal to the excess of (A) the Take-Over
        Price of the shares of Common Stock which are at the time vested under
        each surrendered option (or surrendered portion thereof) over (B) the
        aggregate exercise price payable for such shares. Such cash distribution
        shall be paid within five (5) days following the option surrender date.

                         (iii) The grant of such limited stock appreciation
        right shall automatically constitute the pre-approval by the Plan
        Administrator of the any subsequent exercise of that right in accordance
        with the terms of this Paragraph C. Accordingly, no further approval of
        the Plan Administrator or the Board shall be required at the time of the
        actual surrender of such option and the cash distribution to which the
        optionee shall thereupon become entitled.

                          (iv) The balance of the option (if any) shall continue
        in full force and effect in accordance with the documents evidencing
        such option.


                                       12.



<PAGE>   13



                                  ARTICLE THREE

                             STOCK ISSUANCE PROGRAM


       I.      STOCK ISSUANCE TERMS

               Shares of Common Stock may be issued under the Stock Issuance
Program through direct and immediate issuances without any intervening option
grants. Each such stock issuance shall be evidenced by a Stock Issuance
Agreement which complies with the terms specified below.

               A.     Purchase Price.

                      1. The purchase price per share shall be fixed by the Plan
Administrator, but shall not be less than eighty five percent (85%) of the Fair
Market Value per share of Common Stock on the issuance date.

                      2. Subject to the provisions of Section I of Article Five,
shares of Common Stock may be issued under the Stock Issuance Program for any of
the following items of consideration which the Plan Administrator may deem
appropriate in each individual instance:

                           (i) cash or check made payable to the Corporation, or

                          (ii) past services rendered to the Corporation (or any
        Parent or Subsidiary).

               B.     Vesting Provisions.

                      1. Shares of Common Stock issued under the Stock Issuance
Program may, in the discretion of the Plan Administrator, be fully and
immediately vested upon issuance or may vest in one or more installments over
the Participant's period of Service or upon attainment of specified performance
objectives. The elements of the vesting schedule applicable to any unvested
shares of Common Stock issued under the Stock Issuance Program, namely:

                           (i) the Service period to be completed by the 
        Participant or the performance objectives to be attained,


                          (ii) the number of installments in which the shares 
        are to vest,


                                       13.



<PAGE>   14



                         (iii) the interval or intervals (if any) which are to 
        lapse between installments, and

                          (iv) the effect which death, Permanent Disability or
        other event designated by the Plan Administrator is to have upon the
        vesting schedule,

shall be determined by the Plan Administrator and incorporated into the Stock
Issuance Agreement.

                      2. Any new, substituted or additional securities or other
property (including money paid other than as a regular cash dividend) which the
Participant may have the right to receive with respect to the Participant's
unvested shares of Common Stock by reason of any stock dividend, stock split,
recapitalization, combination of shares, exchange of shares or other change
affecting the outstanding Common Stock as a class without the Corporation's
receipt of consideration shall be issued subject to (i) the same vesting
requirements applicable to the Participant's unvested shares of Common Stock and
(ii) such escrow arrangements as the Plan Administrator shall deem appropriate.

                      3. The Participant shall have full stockholder rights with
respect to any shares of Common Stock issued to the Participant under the Stock
Issuance Program, whether or not the Participant's interest in those shares is
vested. Accordingly, the Participant shall have the right to vote such shares
and to receive any regular cash dividends paid on such shares.

                      4. Should the Participant cease to remain in Service while
holding one or more unvested shares of Common Stock issued under the Stock
Issuance Program or should the performance objectives not be attained with
respect to one or more such unvested shares of Common Stock, then those shares
shall be immediately surrendered to the Corporation for cancellation, and the
Participant shall have no further stockholder rights with respect to those
shares. To the extent the surrendered shares were previously issued to the
Participant for consideration paid in cash or cash equivalent (including the
Participant's purchase-money indebtedness), the Corporation shall repay to the
Participant the cash consideration paid for the surrendered shares and shall
cancel the unpaid principal balance of any outstanding purchase-money note of
the Participant attributable to such surrendered shares.

                      5. The Plan Administrator may in its discretion waive the
surrender and cancellation of one or more unvested shares of Common Stock (or
other assets attributable thereto) which would otherwise occur upon the
cessation of the Participant's Service or the non-completion of the vesting
schedule applicable to such shares. Such waiver shall result in the immediate
vesting of the Participant's interest in the shares of Common Stock as to which
the waiver applies. Such waiver may be effected at any time, whether before or
after the Participant's cessation of Service or the attainment or non-attainment
of the applicable performance objectives.

                                       14.



<PAGE>   15




      II.      CORPORATE TRANSACTION/CHANGE IN CONTROL

               A. All of the outstanding repurchase rights under the Stock
Issuance Program shall terminate automatically, and all the shares of Common
Stock subject to those terminated rights shall immediately vest in full, in the
event of any Corporate Transaction, except to the extent (i) those repurchase
rights are assigned to the successor corporation (or parent thereof) in
connection with such Corporate Transaction or (ii) such accelerated vesting is
precluded by other limitations imposed in the Stock Issuance Agreement.

               B. Any repurchase rights that are assigned in the Corporate
Transaction shall automatically terminate, and all the shares of Common Stock
subject to those terminated rights shall immediately vest in full, in the event
the Participant's Service should subsequently terminate by reason of an
Involuntary Termination within eighteen (18) months following the effective date
of such Corporate Transaction.

               C. The Plan Administrator shall have the discretion, exercisable
either at the time the unvested shares are issued or at any time while the
Corporation's repurchase right remains outstanding, to provide for the automatic
termination of one or more outstanding repurchase rights and the immediate
vesting of the shares of Common Stock subject to those rights upon the
Involuntary Termination of the Participant's Service within a specified period
(not to exceed eighteen (18) months) following the effective date of any Change
in Control.

     III.      SHARE ESCROW/LEGENDS

               Unvested shares may, in the Plan Administrator's discretion, be
held in escrow by the Corporation until the Participant's interest in such
shares vests or may be issued directly to the Participant with restrictive
legends on the certificates evidencing those unvested shares.

                                       15.


<PAGE>   16



                                  ARTICLE FOUR

                         AUTOMATIC OPTION GRANT PROGRAM


       I.      OPTION TERMS

               A. SUCCESSOR PROGRAM. The Automatic Option Grant Program under
this Plan shall, upon stockholder approval of the Plan at the 1997 Annual
Stockholders Meeting, replace the automatic option grant program for
non-employee Board members currently in effect under the 1995 Plan, and no
further option grants shall be made pursuant to that program. All outstanding
options under the automatic option grant program in effect under the 1995 Plan
shall continue to be governed by the terms of the agreements evidencing those
grants, and nothing in this Plan shall affect those options. Stockholder
approval of this Plan at the 1997 Annual Meeting shall also constitute approval
of all option grants made to Eligible Directors pursuant to the provisions of
this Automatic Option Grant Program.

               B. GRANT DATES. Option grants shall be made under the Plan on the
dates specified below:

                      1. Each Eligible Director who is first elected or
appointed as a non- employee Board member after the Effective Date shall
automatically be granted, on the date of such initial election or appointment, a
Non-Statutory Option to purchase 21,000 shares of Common Stock.

                      2. On the date of each Annual Stockholders Meeting,
beginning with the 1997 Annual Meeting, each individual who is to continue to
serve as an Eligible Director after such meeting, shall automatically be
granted, whether or not such individual is standing for re-election as a Board
member at that Annual Meeting, a Non-Statutory Option to purchase an additional
7,000 shares of Common Stock, provided such individual has served as a
non-employee Board member for at least six (6) months prior to the date of such
Annual Meeting. There shall be no limit on the number of such 7,000-share option
grants any one Eligible Director may receive over his or her period of Board
service.

               C.     EXERCISE PRICE.

                      1. The exercise price per share shall be equal to one
hundred percent (100%) of the Fair Market Value per share of Common Stock on the
option grant date.


                                       16.



<PAGE>   17



                      2. The exercise price shall be payable in one or more of
the alternative forms authorized under the Discretionary Option Grant Program.
Except to the extent the sale and remittance procedure specified thereunder is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

               D. OPTION TERM. Each option shall have a term of ten (10) years
measured from the option grant date.

               E. EXERCISE AND VESTING OF OPTIONS. Each option shall be
immediately exercisable for any or all of the option shares. However, any shares
purchased under the option shall be subject to repurchase by the Corporation, at
the exercise price paid per share, upon the Optionee's cessation of Board
service prior to vesting in those shares. The shares subject to each initial
grant shall vest, and the Corporation's repurchase right with respect to those
shares shall lapse, in a series of thirty-six (36) successive equal monthly
installments over the Optionee's period of continued service as a Board member,
with the first such installment to vest upon the Optionee's completion of one
(1) month of Board service measured from the option grant date. The shares
subject to each annual grant shall vest, and the Corporation's repurchase right
with respect to those shares shall lapse, on the day immediately preceding the
date of the next Annual Stockholders Meeting following the grant date, provided
the Optionee continues in Board service through such day.

               F. EFFECT OF TERMINATION OF BOARD SERVICE. The following
provisions shall govern the exercise of any options held by the Optionee at the
time the Optionee ceases to serve as a Board member:

                           (i) The Optionee (or, in the event of Optionee's
        death, the personal representative of the Optionee's estate or the
        person or persons to whom the option is transferred pursuant to the
        Optionee's will or in accordance with the laws of descent and
        distribution) shall have a twelve (12)-month period following the date
        of such cessation of Board service in which to exercise each such
        option.

                          (ii) During the twelve (12)-month exercise period, the
        option may not be exercised in the aggregate for more than the number of
        vested shares of Common Stock for which the option is exercisable at the
        time of the Optionee's cessation of Board service.

                         (iii) Should the Optionee cease to serve as a Board
        member by reason of death or Permanent Disability, then all shares at
        the time subject to the option shall immediately vest so that such
        option may, during the twelve (12)-month exercise period following such
        cessation of Board service, be

                                       17.



<PAGE>   18



        exercised for all or any portion of such shares as fully-vested shares 
        of Common Stock.

                          (iv) In no event shall the option remain exercisable
        after the expiration of the option term. Upon the expiration of the
        twelve (12)-month exercise period or (if earlier) upon the expiration of
        the option term, the option shall terminate and cease to be outstanding
        for any vested shares for which the option has not been exercised.
        However, the option shall, immediately upon the Optionee's cessation of
        Board service, terminate and cease to be outstanding with respect to any
        shares in which the Optionee is not vested on the date of such cessation
        of Board service.

     II.       CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-
               OVER

               A. In the event of any Corporate Transaction, the shares of
Common Stock at the time subject to each outstanding option under the Automatic
Option Grant Program but not otherwise vested shall automatically vest in full
so that each such option shall, immediately prior to the effective date of the
Corporate Transaction, become exercisable for all of the shares of Common Stock
at the time subject to such option and may be exercised for all or any portion
of such shares as fully-vested shares of Common Stock. Immediately following the
consummation of the Corporate Transaction, each automatic option grant shall
terminate and cease to be outstanding, except to the extent assumed by the
successor corporation (or parent thereof).

               B. In the event of any Change in Control, the shares of Common
Stock at the time subject to each outstanding option but not otherwise vested
shall automatically vest in full so that each such option shall, immediately
prior to the effective date of the Change in Control, become exercisable for all
of the shares of Common Stock at the time subject to such option and may be
exercised for all or any portion of such shares as fully-vested shares of Common
Stock. Each such option shall remain exercisable for such fully-vested option
shares until the expiration or sooner termination of the option term or the
surrender of the option in connection with a Hostile Take-Over.

               C. Upon the occurrence of a Hostile Take-Over, the Optionee shall
have a thirty (30)-day period in which to surrender to the Corporation each
option grant held by him or her under this Automatic Option Grant Program. The
Optionee shall in return be entitled to a cash distribution from the Corporation
in an amount equal to the excess of (i) the Take-Over Price of the shares of
Common Stock at the time subject to the surrendered option (whether or not the
Optionee is otherwise at the time vested in those shares) over (ii) the
aggregate exercise price payable for such shares. Such cash distribution shall
be paid within five (5) days following the surrender of the option to the
Corporation. Such surrender right shall form a part of each option grant made
under this Automatic Option Grant Program, and stockholder approval of this

                                       18.



<PAGE>   19



Plan shall constitute pre-approval of the subsequent exercise of that right in
accordance with the provisions of this Paragraph C. Accordingly, no approval of
the Board or the Plan Administrator shall be required at the time of the actual
option surrender and the cash distribution to which the optionee shall thereupon
become entitled.

               D. The grant of options under the Automatic Option Grant Program
shall in no way affect the right of the Corporation to adjust, reclassify,
reorganize or otherwise change its capital or business structure or to merge,
consolidate, dissolve, liquidate or sell or transfer all or any part of its
business or assets.

    III.       REMAINING TERMS

               The remaining terms of each option granted under the Automatic
Option Grant Program shall be the same as the terms in effect for option grants
made under the Discretionary Option Grant Program.


                                       19.



<PAGE>   20



                                  ARTICLE FIVE

                                  MISCELLANEOUS


      I.       FINANCING

               A. The Plan Administrator may permit any Optionee or Participant
to pay the option exercise price under the Discretionary Option Grant Program or
the purchase price for shares issued under the Stock Issuance Program by
delivering a promissory note payable in one or more installments. The terms of
any such promissory note (including the interest rate and the terms of
repayment) shall be established by the Plan Administrator in its sole
discretion. Promissory notes may be authorized with or without security or
collateral. In all events, the maximum credit available to the Optionee or
Participant may not exceed the sum of (i) the aggregate option exercise price or
purchase price payable for the purchased shares plus (ii) any Federal, state and
local income and employment tax liability incurred by the Optionee or the
Participant in connection with the option exercise or share purchase.

               B. The Plan Administrator may, in its discretion, determine that
one or more such promissory notes shall be subject to forgiveness by the
Corporation in whole or in part upon such terms as the Plan Administrator may
deem appropriate.

     II.       TAX WITHHOLDING

               A. The Corporation's obligation to deliver shares of Common Stock
upon the exercise of options or stock appreciation rights or upon the issuance
or vesting of such shares under the Plan shall be subject to the satisfaction of
all applicable Federal, state and local income and employment tax withholding
requirements.

               B. The Plan Administrator may, in its discretion, provide any or
all holders of Non-Statutory Options or unvested shares of Common Stock under
the Plan (other than the options granted or the shares issued under the
Automatic Option Grant Program) with the right to use shares of Common Stock in
satisfaction of all or part of the Taxes incurred by such holders in connection
with the exercise of their options or the vesting of their shares. Such right
may be provided to any such holder in either or both of the following formats:

                           (i) Stock Withholding: The election to have the
        Corporation withhold, from the shares of Common Stock otherwise issuable
        upon the exercise of such Non-Statutory Option or the vesting of such
        shares, a portion of those shares with an aggregate Fair Market Value
        equal to the percentage of the Taxes (not to exceed one hundred percent
        (100%)) designated by the holder.


                                       20.



<PAGE>   21



                          (ii) Stock Delivery: The election to deliver to the
        Corporation, at the time the Non-Statutory Option is exercised or the
        shares vest, one or more shares of Common Stock previously acquired by
        such holder (other than in connection with the option exercise or share
        vesting triggering the Taxes) with an aggregate Fair Market Value equal
        to the percentage of the Taxes (not to exceed one hundred percent
        (100%)) designated by the holder.

    III.       EFFECTIVE DATE AND TERM OF THE PLAN

               A. The Plan became effective on the Effective Date. However, no
options granted under the Plan may be exercised, and no shares shall be issued
under the Plan, until the Plan is approved by the Corporation's stockholders. If
such stockholder approval is not obtained within twelve (12) months after the
Effective Date, then all options previously granted under this Plan shall
terminate and cease to be outstanding, and no further options shall be granted
and no shares shall be issued under the Plan.

               B. The Plan shall terminate upon the earliest of (i) September
22, 2007, (ii) the date on which all shares available for issuance under the
Plan shall have been issued as vested shares pursuant to the exercise of options
or the issuance of shares under the Plan or (iii) the termination of all
outstanding options in connection with a Corporate Transaction. Should this Plan
terminate on September 22, 2007, then all options and unvested stock issuances
outstanding on such date shall thereafter continue to have force and effect in
accordance with the provisions of the documents evidencing such options or
issuances.

     IV.       AMENDMENT OF THE PLAN

               A. The Board shall have complete and exclusive power and
authority to amend or modify the Plan in any or all respects. However, no such
amendment or modification shall adversely affect the rights and obligations with
respect to stock options, stock appreciation rights or unvested stock issuances
at the time outstanding under the Plan unless the Optionee or the Participant
consents to such amendment or modification. In addition, certain amendments may
require stockholder approval pursuant to applicable law or regulations.

               B. Options to purchase shares of Common Stock may be granted
under the Discretionary Option Grant Program and shares of Common Stock may be
issued under the Stock Issuance Program that are in each instance in excess of
the number of shares then available for issuance under the Plan, provided any
excess shares actually issued under those programs are held in escrow until
there is obtained stockholder approval of an amendment sufficiently increasing
the number of shares of Common Stock available for issuance under the Plan. If
such stockholder approval is not obtained within twelve (12) months after the
date the first such excess issuances are made, then (i) any unexercised options
granted on the basis of such excess shares shall terminate and cease to be
outstanding and (ii) the Corporation shall promptly refund to the

                                       21.


<PAGE>   22



Optionees and the Participants the exercise or purchase price paid for any
excess shares issued under the Plan and held in escrow, together with interest
(at the applicable Short Term Federal Rate) for the period the shares were held
in escrow, and such shares shall thereupon be automatically cancelled and cease
to be outstanding.

      V.       USE OF PROCEEDS

               Any cash proceeds received by the Corporation from the sale of
shares of Common Stock under the Plan shall be used for general corporate
purposes.

     VI.       REGULATORY APPROVALS

               A. The implementation of the Plan, the granting of any option or
stock appreciation right under the Plan and the issuance of any shares of Common
Stock (i) upon the exercise of any option or stock appreciation right or (ii)
under the Stock Issuance Program shall be subject to the Corporation's
procurement of all approvals and permits required by regulatory authorities
having jurisdiction over the Plan, the options and stock appreciation rights
granted under it and the shares of Common Stock issued pursuant to it.

               B. No shares of Common Stock or other assets shall be issued or
delivered under the Plan unless and until there shall have been compliance with
all applicable requirements of Federal and state securities laws, including the
filing and effectiveness of the Form S-8 registration statement for the shares
of Common Stock issuable under the Plan, and all applicable listing requirements
of any stock exchange (or the Nasdaq National Market, if applicable) on which
Common Stock is then listed for trading.

    VII.       NO EMPLOYMENT/SERVICE RIGHTS

               Nothing in the Plan shall confer upon the Optionee or the
Participant any right to continue in Service for any period of specific duration
or interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining such person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's Service at any time for any reason, with or without
cause.



                                       22.



<PAGE>   23



                                    APPENDIX

               The following definitions shall be in effect under the Plan:

        A. AUTOMATIC OPTION GRANT PROGRAM shall mean the automatic option grant
program in effect under the Plan.

        B. BOARD shall mean the Corporation's Board of Directors.

        C. CHANGE IN CONTROL shall mean a change in ownership or control of the
Corporation effected through either of the following transactions:

                    (i) the acquisition, directly or indirectly, by any person
        or related group of persons (other than the Corporation or a person that
        directly or indirectly controls, is controlled by, or is under common
        control with, the Corporation), of beneficial ownership (within the
        meaning of Rule 13d-3 of the 1934 Act) of securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities pursuant to a tender or exchange
        offer made directly to the Corporation's stockholders, or

                   (ii) a change in the composition of the Board over a period
        of thirty-six (36) consecutive months or less such that a majority of
        the Board members ceases, by reason of one or more contested elections
        for Board membership, to be comprised of individuals who either (A) have
        been Board members continuously since the beginning of such period or
        (B) have been elected or nominated for election as Board members during
        such period by at least a majority of the Board members described in
        clause (A) who were still in office at the time the Board approved such
        election or nomination.

        D. CODE shall mean the Internal Revenue Code of 1986, as amended.

        E. COMMON STOCK shall mean the Corporation's common stock.

        F. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

                    (i) a merger or consolidation in which securities possessing
        more than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction; or


                                      A-1.



<PAGE>   24




                   (ii) the sale, transfer or other disposition of all or
        substantially all of the Corporation's assets in complete liquidation or
        dissolution of the Corporation.

        G. CORPORATION shall mean ACT Networks, Inc., a Delaware corporation.

        H. DISCRETIONARY OPTION GRANT PROGRAM shall mean the discretionary
option grant program in effect under the Plan.

        I. EFFECTIVE DATE shall mean the date of the 1997 Annual Stockholders
Meeting, provided the Plan is approved by the stockholders at such Annual
Meeting.

        J. ELIGIBLE DIRECTOR shall mean a non-employee Board member eligible to
participate in the Automatic Option Grant Program in accordance with the
eligibility provisions of Article One.

        K. EMPLOYEE shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

        L. EXERCISE DATE shall mean the date on which the Corporation shall have
received written notice of the option exercise.

        M. FAIR MARKET VALUE per share of Common Stock on any relevant date
shall be determined in accordance with the following provisions:

                    (i) If the Common Stock is at the time traded on the Nasdaq
        National Market, then the Fair Market Value shall be the closing selling
        price per share of Common Stock on the date in question, as such price
        is reported by the National Association of Securities Dealers on the
        Nasdaq National Market. If there is no closing selling price for the
        Common Stock on the date in question, then the Fair Market Value shall
        be the closing selling price on the last preceding date for which such
        quotation exists.

                   (ii) If the Common Stock is at the time listed on any Stock
        Exchange, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question on the Stock Exchange
        determined by the Plan Administrator to be the primary market for the
        Common Stock, as such price is officially quoted in the composite tape
        of transactions on such exchange. If there is no closing selling price
        for the Common Stock on the date in question, then the Fair Market Value
        shall be the closing selling price on the last preceding date for which
        such quotation exists.

                                      A-2.



<PAGE>   25




        N. 5% STOCKHOLDER shall mean the owner of securities (as determined
under Code Section 424(d)) possessing more than five percent (5%) of the total
combined voting power of the outstanding securities of the Corporation (or any
Parent or Subsidiary).

        O. HOSTILE TAKE-OVER shall mean the acquisition, directly or indirectly,
by any person or related group of persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) of beneficial ownership (within the
meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities pursuant to a tender or exchange offer made directly to
the Corporation's stockholders which the Board does not recommend such
stockholders to accept.

        P. INCENTIVE OPTION shall mean an option which satisfies the
requirements of Code Section 422.

        Q. INVOLUNTARY TERMINATION shall mean the termination of the Service of
any individual which occurs by reason of:

                    (i) such individual's involuntary dismissal or discharge by 
        the Corporation for reasons other than Misconduct, or

                   (ii) such individual's voluntary resignation following (A) a
        change in his or her position with the Corporation which materially
        reduces his or her duties and responsibilities, (B) a reduction in his
        or her level of compensation (including base salary, fringe benefits and
        target bonuses under any corporate-performance based bonus or incentive
        programs) by more than fifteen percent (15%) or (C) a relocation of such
        individual's place of employment by more than fifty (50) miles, provided
        and only if such change, reduction or relocation is effected by the
        Corporation without the individual's consent.

        R. MISCONDUCT shall mean the commission of any act of fraud,
embezzlement or dishonesty by the Optionee or Participant, any unauthorized use
or disclosure by such person of confidential information or trade secrets of the
Corporation (or any Parent or Subsidiary), or any other intentional misconduct
by such person adversely affecting the business or affairs of the Corporation
(or any Parent or Subsidiary) in a material manner. The foregoing definition
shall not be deemed to be inclusive of all the acts or omissions which the
Corporation (or any Parent or Subsidiary) may consider as grounds for the
dismissal or discharge of any Optionee, Participant or other person in the
Service of the Corporation (or any Parent or Subsidiary).

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


                                      A-3.



<PAGE>   26



        T. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
requirements of Code Section 422.

        U. OPTIONEE shall mean any person to whom an option is granted under the
Discretionary Option Grant or Automatic Option Grant Program.

        V. PARENT shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

        W. PARTICIPANT shall mean any person who is issued shares of Common
Stock under the Stock Issuance Program.

        X. PERMANENT DISABILITY OR PERMANENTLY DISABLED shall mean the inability
of the Optionee or the Participant to engage in any substantial gainful activity
by reason of any medically determinable physical or mental impairment expected
to result in death or to be of continuous duration of twelve (12) months or
more. However, solely for the purposes of the Automatic Option Grant Program,
Permanent Disability or Permanently Disabled shall mean the inability of the
non-employee Board member to perform his or her usual duties as a Board member
by reason of any medically determinable physical or mental impairment expected
to result in death or to be of continuous duration of twelve (12) months or
more.

        Y. PLAN shall mean the Corporation's 1997 Stock Incentive Plan, as set
forth in this document.

        Z. PLAN ADMINISTRATOR shall mean the particular entity, whether the
Primary Committee, the Board or the Secondary Committee, which is authorized to
administer the Discretionary Option Grant and Stock Issuance Programs with
respect to one or more classes of eligible persons, to the extent such entity is
carrying out its administrative functions under those programs with respect to
the persons under its jurisdiction.

        AA. PRIMARY COMMITTEE shall mean the committee of two (2) or more
non-employee Board members appointed by the Board to administer the
Discretionary Option Grant and Stock Issuance Programs with respect to Section
16 Insiders.

        AB. SECONDARY COMMITTEE shall mean a committee of one (1) or more Board
members appointed by the Board to administer the Discretionary Option Grant and
Stock Issuance Programs with respect to eligible persons other than Section 16
Insiders.


                                      A-4.



<PAGE>   27


        AC. SECTION 16 INSIDER shall mean an officer or director of the
Corporation subject to the short-swing profit liabilities of Section 16 of the
1934 Act.

        AD. SERVICE shall mean the performance of services for the Corporation
(or any Parent or Subsidiary) by a person in the capacity of an Employee, a
non-employee member of the board of directors or a consultant or independent
advisor, except to the extent otherwise specifically provided in the documents
evidencing the option grant or stock issuance.

        AE. STOCK EXCHANGE shall mean either the American Stock Exchange or the
New York Stock Exchange.

        AF. STOCK ISSUANCE AGREEMENT shall mean the agreement entered into by
the Corporation and the Participant at the time of issuance of shares of Common
Stock under the Stock Issuance Program.

        AG. STOCK ISSUANCE PROGRAM shall mean the stock issuance program in
effect under the Plan.

        AH. SUBSIDIARY shall mean any corporation (other than the Corporation)
in an unbroken chain of corporations beginning with the Corporation, provided
each corporation (other than the last corporation) in the unbroken chain owns,
at the time of the determination, stock possessing fifty percent (50%) or more
of the total combined voting power of all classes of stock in one of the other
corporations in such chain. For purposes of the grant of Non-Statutory Options
and stock appreciation rights under the Discretionary Option Grant Program and
direct stock issuances under the Stock Issuance Program, the term Subsidiary
shall also include any corporation, partnership, joint venture or other business
entity in which the Corporation owns, directly or indirectly, stock or a capital
or profit interest.

        AI. TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value
per share of Common Stock on the date the option is surrendered to the
Corporation in connection with a Hostile Take-Over or (ii) the highest reported
price per share of Common Stock paid by the tender offeror in effecting such
Hostile Take-Over. However, if the surrendered option is an Incentive Option,
the Take-Over Price shall not exceed the clause (i) price per share.

        AJ. TAXES shall mean the Federal, state and local income and employment
tax liabilities incurred by the holder of Non-Statutory Options or unvested
shares of Common Stock in connection with the exercise of those options or the
vesting of those shares.

        AK. 10% STOCKHOLDER shall mean the owner of stock (as determined under
Code Section 424(d)) possessing more than ten percent (10%) of the total
combined voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).


                                      A-5.





<PAGE>   1
                                                                    EXHIBIT 99.2



                               ACT NETWORKS, INC.
                         NOTICE OF GRANT OF STOCK OPTION

               Notice is hereby given of the following option grant (the
"Option") to purchase shares of the Common Stock of ACT Networks, Inc. (the
"Corporation"):

               Optionee: ______________________________________________________

               Grant Date:_____________________________________________________

               Vesting Commencement Date:______________________________________

               Exercise Price:  $ ___________________ per share

               Number of Option Shares:________________ shares

               Expiration Date:________________________________________________

               Type of Option:  ___    Incentive Stock Option
                                ___    Non-Statutory Stock Option

               Exercise Schedule: The Option shall become exercisable for
               twenty-four percent (24%) of the Option Shares upon Optionee's
               completion of one (1) year of Service measured from the Vesting
               Commencement Date and shall become exercisable for the balance of
               the Option Shares in successive equal monthly installments upon
               Optionee's completion of each additional month of Service over
               the thirty-eight (38) month period measured from the first
               anniversary of the Vesting Commencement Date. In no event shall
               the Option become exercisable for any additional Option Shares
               after Optionee's cessation of Service.

               Optionee understands and agrees that the Option is granted
subject to and in accordance with the terms of the ACT Networks, Inc. 1997 Stock
Incentive Plan (the "Plan"). Optionee further agrees to be bound by the terms of
the Plan and the terms of the Option as set forth in the Stock Option Agreement
attached hereto as Exhibit A. Optionee hereby further acknowledges receipt of a
copy of the official prospectus for the Plan in the form attached hereto as
Exhibit B. A copy of the Plan is available upon request made to the Corporate
Secretary at the Corporation's principal offices.


<PAGE>   2




               No Employment or Service Contract. Nothing in this Notice or in
the attached Stock Option Agreement or in the Plan shall confer upon Optionee
any right to continue in Service for any period of specific duration or
interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining Optionee) or of Optionee,
which rights are hereby expressly reserved by each, to terminate Optionee's
Service at any time for any reason, with or without cause.

               Definitions. All capitalized terms in this Notice shall have the
meaning assigned to them in this Notice or in the attached Stock Option
Agreement.


_______________________ , 199__
        Date


                                                   ACT NETWORKS, INC.


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

                                                   Title:
                                                         -----------------------



                                                   -----------------------------
                                                   OPTIONEE

                                                   Address:_____________________

                                                   _____________________________


ATTACHMENTS
EXHIBIT A - STOCK OPTION AGREEMENT
EXHIBIT B - PLAN SUMMARY AND PROSPECTUS


                                       2.


<PAGE>   3



                                    EXHIBIT A

                             STOCK OPTION AGREEMENT




<PAGE>   4


                                    EXHIBIT B

                           PLAN SUMMARY AND PROSPECTUS





<PAGE>   1
                                                                    EXHIBIT 99.3

                               ACT NETWORKS, INC.
                             STOCK OPTION AGREEMENT



RECITALS

        A. The Board has adopted the Plan for the purpose of retaining the
services of selected Employees, non-employee members of the Board or the board
of directors of any Parent or Subsidiary and consultants and other independent
advisors who provide services to the Corporation (or any Parent or Subsidiary).

        B. Optionee is to render valuable services to the Corporation (or a
Parent or Subsidiary), and this Agreement is executed pursuant to, and is
intended to carry out the purposes of, the Plan in connection with the
Corporation's grant of an option to Optionee.

        C. All capitalized terms in this Agreement shall have the meaning
assigned to them in the attached Appendix.

               NOW, THEREFORE, it is hereby agreed as follows:

               1. GRANT OF OPTION. The Corporation hereby grants to Optionee, as
of the Grant Date, an option to purchase up to the number of Option Shares
specified in the Grant Notice. The Option Shares shall be purchasable from time
to time during the option term specified in Paragraph 2 at the Exercise Price.

               2. OPTION TERM. This option shall have a term of ten (10) years
measured from the Grant Date and shall accordingly expire at the close of
business on the Expiration Date, unless sooner terminated in accordance with
Paragraph 5 or 6.

               3. LIMITED TRANSFERABILITY. This option shall be neither
transferable nor assignable by Optionee other than by will or by the laws of
descent and distribution following Optionee's death and may be exercised, during
Optionee's lifetime, only by Optionee. However, if this option is designated a
Non-Statutory Option in the Grant Notice, then this option may also be assigned
in whole or in part during the Optionee's lifetime to one or more members of the
Optionee's immediate family or to a trust established exclusively for one or
more such family members. The assigned portion may only be exercised by the
person or persons who acquire a proprietary interest in the option pursuant to
the assignment. The terms applicable to the assigned portion shall be the same
as those in effect for the option immediately prior to such assignment and shall
be set forth in such documents issued to the assignee as the Plan Administrator
may deem appropriate.



<PAGE>   2



               4. DATES OF EXERCISE. This option shall become exercisable for
the Option Shares in one or more installments as specified in the Grant Notice.
As the option becomes exercisable for such installments, those installments
shall accumulate, and the option shall remain exercisable for the accumulated
installments until the Expiration Date or sooner termination of the option term
under Paragraph 5 or 6.

               5. CESSATION OF SERVICE. The option term specified in Paragraph 2
shall terminate (and this option shall cease to be outstanding) prior to the
Expiration Date should any of the following provisions become applicable:

                           (i) Should Optionee cease to remain in Service for
        any reason (other than death, Permanent Disability or Misconduct) while
        this option is outstanding, then the period during which this option may
        be exercised shall be limited to the three (3)-month period commencing
        with the date of such cessation of Service, but in no event shall this
        option be exercisable at any time after the Expiration Date.

                          (ii) Should Optionee die while holding this option,
        then the personal representative of Optionee's estate or the person or
        persons to whom the option is transferred pursuant to Optionee's will or
        in accordance with the laws of descent and distribution shall have the
        right to exercise this option. Such right shall lapse, and this option
        shall cease to be outstanding upon the earlier of (A) the expiration of
        the twelve (12)-month period measured from the date of Optionee's death
        or (B) the Expiration Date.

                         (iii) Should Optionee cease Service by reason of
        Permanent Disability while this option is outstanding, then the period
        during which this option may be exercised shall be limited to the twelve
        (12)-month period commencing with the date of such cessation of Service.
        In no event shall this option be exercisable at any time after the
        Expiration Date.

                          (iv) Should Optionee's Service be terminated for
        Misconduct, then this option shall terminate immediately and cease to
        remain outstanding.

                           (v) During the limited period of post-Service
        exercisability, this option may not be exercised in the aggregate for
        more than the number of Option Shares for which the option is
        exercisable at the time of Optionee's cessation of Service. Upon the
        expiration of such limited exercise period or (if earlier) upon the
        Expiration Date, this option shall terminate and cease to be outstanding
        for any otherwise exercisable Option Shares for which the option has not
        been exercised. To the extent this option is not exercisable for one or
        more Option Shares at the time of Optionee's cessation of Service, this
        option shall immediately terminate and cease to be outstanding with
        respect to those shares.

                                       2.

<PAGE>   3




                          (vi) In the event of a Corporate Transaction, the
        provisions of Paragraph 6 shall govern the period for which this option
        is to remain exercisable following Optionee's cessation of Service and
        shall supersede any provisions to the contrary in this Paragraph 5.

               6.     SPECIAL ACCELERATION OF OPTION.

                      (a) In the event of a Corporate Transaction, this option,
to the extent outstanding at such time but not otherwise fully exercisable,
shall automatically accelerate so that this option shall, immediately prior to
the effective date of the Corporate Transaction, become exercisable for all of
the Option Shares at the time subject to this Option and may be exercised for
any or all of those Option Shares as fully-vested shares. However, this option
shall not become exercisable on such an accelerated basis, if and to the extent:
(i) this option is, in connection with the Corporate Transaction, to be assumed
by the successor corporation (or parent thereof) or (ii) this option is to be
replaced with a cash incentive program of the successor corporation which
preserves the spread existing at the time of the Corporate Transaction on the
Option Shares for which this option is not otherwise at that time exercisable
(the excess of the Fair Market Value of those Option Shares over the aggregate
Exercise Price payable for such shares) and provides for subsequent pay-out in
accordance with the same exercise/vesting schedule in effect for the Option
Shares pursuant to the option exercise schedule set forth in the Grant Notice.

                      (b) Immediately following the Corporate Transaction, this
option shall terminate and cease to be outstanding, except to the extent assumed
by the successor corporation (or parent thereof) in connection with the
Corporate Transaction.

                      (c) If this option is assumed in connection with a
Corporate Transaction, then this option shall be appropriately adjusted,
immediately after such Corporate Transaction, to apply to the number and class
of securities which would have been issuable to Optionee in consummation of such
Corporate Transaction had the option been exercised immediately prior to such
Corporate Transaction, and appropriate adjustments shall also be made to the
Exercise Price, provided the aggregate Exercise Price shall remain the same.

                      (d) Upon an Involuntary Termination of Optionee's Service
within eighteen (18) months following a Corporate Transaction in which this
option is assumed, this option, to the extent outstanding at such time but not
otherwise fully exercisable, shall automatically accelerate so that this option
shall immediately become exercisable for all the Option Shares at the time
subject to this option and may be exercised for any or all of those Option
Shares as fully-vested shares of Common Stock. The option as so accelerated
shall remain exercisable for the vested Option Shares until the earlier of (i)
the Expiration Date or (ii) the expiration of the one (1)-year period measured
from the effective date of the Involuntary Termination, whereupon the option
shall terminate and cease to be outstanding.


                                       3.

<PAGE>   4



                      (e) This Agreement shall not in any way affect the right
of the Corporation to adjust, reclassify, reorganize or otherwise change its
capital or business structure or to merge, consolidate, dissolve, liquidate or
sell or transfer all or any part of its business or assets.

               7.     ADJUSTMENT IN OPTION SHARES. Should any change be made to 
the Common Stock by reason of any stock split, stock dividend, recapitalization,
combination of shares, exchange of shares or other change affecting the
outstanding Common Stock as a class without the Corporation's receipt of
consideration, appropriate adjustments shall be made to (i) the total number
and/or class of securities subject to this option and (ii) the Exercise Price in
order to reflect such change and thereby preclude a dilution or enlargement of
benefits hereunder.

               8.     STOCKHOLDER RIGHTS. The holder of this option shall not 
have any stockholder rights with respect to the Option Shares until such person
shall have exercised the option, paid the Exercise Price and become a holder of
record of the purchased shares.

               9.     MANNER OF EXERCISING OPTION.

                      (a) In order to exercise this option with respect to all
or any part of the Option Shares for which this option is at the time
exercisable, Optionee (or any other person or persons exercising the option)
must take the following actions:

                                  (i) Execute and deliver to the Corporation a
        Notice of Exercise for the Option Shares for which the option is
        exercised.

                                  (ii) Pay the aggregate Exercise Price for the
        purchased shares in one or more of the following forms:

                                    (A) cash or check made payable to the
               Corporation;

                                    (B) a promissory note payable to the
               Corporation, but only to the extent authorized by the Plan
               Administrator in accordance with Paragraph 13;

                                    (C) shares of Common Stock held by Optionee
               (or any other person or persons exercising the option) for the
               requisite period necessary to avoid a charge to the Corporation's
               earnings for financial reporting purposes and valued at Fair
               Market Value on the Exercise Date; or


                                       4.

<PAGE>   5



                                    (D) through a special sale and remittance
               procedure pursuant to which Optionee (or any other person or
               persons exercising the option) shall concurrently provide
               irrevocable instructions (I) to a Corporation-designated
               brokerage firm to effect the immediate sale of the purchased
               shares and remit to the Corporation, out of the sale proceeds
               available on the settlement date, sufficient funds to cover the
               aggregate Exercise Price payable for the purchased shares plus
               all applicable Federal, state and local income and employment
               taxes required to be withheld by the Corporation by reason of
               such exercise and (II) to the Corporation to deliver the
               certificates for the purchased shares directly to such brokerage
               firm in order to complete the sale.

                      Except to the extent the sale and remittance procedure is
               utilized in connection with the option exercise, payment of the
               Exercise Price must accompany the Notice of Exercise delivered to
               the Corporation in connection with the option exercise.

                                (iii) Furnish to the Corporation appropriate
        documentation that the person or persons exercising the option (if other
        than Optionee) have the right to exercise this option.

                                (iv) Make appropriate arrangements with the
        Corporation (or Parent or Subsidiary employing or retaining Optionee)
        for the satisfaction of all Federal, state and local income and
        employment tax withholding requirements applicable to the option
        exercise.

                      (b) As soon as practical after the Exercise Date, the
Corporation shall issue to or on behalf of Optionee (or any other person or
persons exercising this option) a certificate for the purchased Option Shares,
with the appropriate legends affixed thereto.

                      (c) In no event may this option be exercised for any
fractional shares.

               10. COMPLIANCE WITH LAWS AND REGULATIONS.

                      (a) The exercise of this option and the issuance of the
Option Shares upon such exercise shall be subject to compliance by the
Corporation and Optionee with all applicable requirements of law relating
thereto and with all applicable regulations of any stock exchange (or the Nasdaq
National Market, if applicable) on which the Common Stock may be listed for
trading at the time of such exercise and issuance.


                                       5.

<PAGE>   6



                      (b) The inability of the Corporation to obtain approval
from any regulatory body having authority deemed by the Corporation to be
necessary to the lawful issuance and sale of any Common Stock pursuant to this
option shall relieve the Corporation of any liability with respect to the
non-issuance or sale of the Common Stock as to which such approval shall not
have been obtained. The Corporation, however, shall use its best efforts to
obtain all such approvals.

               11. SUCCESSORS AND ASSIGNS. Except to the extent otherwise
provided in Paragraphs 3 and 6, the provisions of this Agreement shall inure to
the benefit of, and be binding upon, the Corporation and its successors and
assigns and Optionee, Optionee's assigns and the legal representatives, heirs
and legatees of Optionee's estate.

               12. NOTICES. Any notice required to be given or delivered to the
Corporation under the terms of this Agreement shall be in writing and addressed
to the Corporation at its principal corporate offices. Any notice required to be
given or delivered to Optionee shall be in writing and addressed to Optionee at
the address indicated below Optionee's signature line on the Grant Notice. All
notices shall be deemed effective upon personal delivery or upon deposit in the
U.S. mail, postage prepaid and properly addressed to the party to be notified.

               13. FINANCING. The Plan Administrator may, in its absolute
discretion and without any obligation to do so, permit Optionee to pay the
Exercise Price for the purchased Option Shares by delivering a promissory note.
The terms of any such promissory note (including the interest rate, the
requirements for collateral and the terms of repayment) shall be established by
the Plan Administrator in its sole discretion.

               14. CONSTRUCTION. This Agreement and the option evidenced hereby
are made and granted pursuant to the Plan and are in all respects limited by and
subject to the terms of the Plan. All decisions of the Plan Administrator with
respect to any question or issue arising under the Plan or this Agreement shall
be conclusive and binding on all persons having an interest in this option.

               15. GOVERNING LAW. The interpretation, performance and
enforcement of this Agreement shall be governed by the laws of the State of
California without resort to that State's conflict-of-laws rules.

               16. EXCESS SHARES. If the Option Shares covered by this Agreement
exceed, as of the Grant Date, the number of shares of Common Stock which may
without stockholder approval be issued under the Plan, then this option shall be
void with respect to such excess shares, unless stockholder approval of an
amendment sufficiently increasing the number of shares of Common Stock issuable
under the Plan is obtained in accordance with the provisions of the Plan.


                                       6.

<PAGE>   7



               17. ADDITIONAL TERMS APPLICABLE TO AN INCENTIVE OPTION. In the
event this option is designated an Incentive Option in the Grant Notice, the
following terms and conditions shall also apply to the grant:

                                (i) This option shall cease to qualify for
        favorable tax treatment as an Incentive Option if (and to the extent)
        this option is exercised for one or more Option Shares: (A) more than
        three (3) months after the date Optionee ceases to be an Employee for
        any reason other than death or Permanent Disability or (B) more than
        twelve (12) months after the date Optionee ceases to be an Employee by
        reason of Permanent Disability.

                                (ii) No installment under this option shall
        qualify for favorable tax treatment as an Incentive Option if (and to
        the extent) the aggregate Fair Market Value (determined at the Grant
        Date) of the Common Stock for which such installment first becomes
        exercisable hereunder would, when added to the aggregate value
        (determined as of the respective date or dates of grant) of any earlier
        installments of the Common Stock and any other securities for which this
        option or any other Incentive Options granted to Optionee prior to the
        Grant Date (whether under the Plan or any other option plan of the
        Corporation or any Parent or Subsidiary) first become exercisable during
        the same calendar year, exceed One Hundred Thousand Dollars ($100,000)
        in the aggregate. Should such One Hundred Thousand Dollar ($100,000)
        limitation be exceeded in any calendar year, this option shall
        nevertheless become exercisable for the excess shares in such calendar
        year as a Non-Statutory Option.

                                (iii) Should the exercisability of this option
        be accelerated upon a Corporate Transaction, then this option shall
        qualify for favorable tax treatment as an Incentive Option only to the
        extent the aggregate Fair Market Value (determined at the Grant Date) of
        the Common Stock for which this option first becomes exercisable in the
        calendar year in which the Corporate Transaction occurs does not, when
        added to the aggregate value (determined as of the respective date or
        dates of grant) of the Common Stock or other securities for which this
        option or one or more other Incentive Options granted to Optionee prior
        to the Grant Date (whether under the Plan or any other option plan of
        the Corporation or any Parent or Subsidiary) first become exercisable
        during the same calendar year, exceed One Hundred Thousand Dollars
        ($100,000) in the aggregate. Should the applicable One Hundred Thousand
        Dollar ($100,000) limitation be exceeded in the calendar year of such
        Corporate Transaction, the option may nevertheless be exercised for the
        excess shares in such calendar year as a Non-Statutory Option.


                                       7.

<PAGE>   8



                                (iv) Should Optionee hold, in addition to this
        option, one or more other options to purchase Common Stock which become
        exercisable for the first time in the same calendar year as this option,
        then the foregoing limitations on the exercisability of such options as
        Incentive Options shall be applied on the basis of the order in which
        such options are granted.

                                       8.

<PAGE>   9



                                    EXHIBIT I

                               NOTICE OF EXERCISE


               I hereby notify ACT Networks, Inc. (the "Corporation") that I
elect to purchase shares of the Corporation's Common Stock (the "Purchased
Shares") at the option exercise price of $ per share (the "Exercise Price")
pursuant to that certain option (the "Option") granted to me under the
Corporation's 1997 Stock Incentive Plan on _________________ , 199__ .

               Concurrently with the delivery of this Exercise Notice to the
Corporation, I shall hereby pay to the Corporation the Exercise Price for the
Purchased Shares in accordance with the provisions of my agreement with the
Corporation (or other documents) evidencing the Option and shall deliver
whatever additional documents may be required by such agreement as a condition
for exercise. Alternatively, I may utilize the special broker-dealer sale and
remittance procedure specified in my agreement to effect payment of the Exercise
Price.


______________________ , 199__
Date

                                    --------------------------------------------
                                    Optionee

                                    Address:
                                           -------------------------------------

                                    --------------------------------------------
Print name in exact manner
it is to appear on the
stock certificate:                  --------------------------------------------

Address to which certificate
is to be sent, if different
from address above:                 --------------------------------------------

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

Social Security Number:             --------------------------------------------

Employee Number:                    --------------------------------------------


<PAGE>   10



                                    APPENDIX


               The following definitions shall be in effect under the Agreement:

        A. AGREEMENT shall mean this Stock Option Agreement.

        B. BOARD shall mean the Corporation's Board of Directors.

        C. CODE shall mean the Internal Revenue Code of 1986, as amended.

        D. COMMON STOCK shall mean the Corporation's common stock.

        E. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

             (i) a merger or consolidation in which securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction, or

            (ii) the sale, transfer or other disposition of all or substantially
        all of the Corporation's assets in complete liquidation or dissolution
        of the Corporation.

        F. CORPORATION shall mean ACT Networks, Inc., a Delaware corporation.

        G. EMPLOYEE shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

        H. EXERCISE DATE shall mean the date on which the option shall have been
exercised in accordance with Paragraph 9 of the Agreement.

        I. EXERCISE PRICE shall mean the exercise price per share as specified 
in the Grant Notice.

        J. EXPIRATION DATE shall mean the date on which the option expires as 
specified in the Grant Notice.

        K. FAIR MARKET VALUE per share of Common Stock on any relevant date
shall be determined in accordance with the following provisions:


                                      A-1.

<PAGE>   11



             (i) If the Common Stock is at the time traded on the Nasdaq
        National Market, then the Fair Market Value shall be the closing selling
        price per share of Common Stock on the date in question, as the price is
        reported by the National Association of Securities Dealers on the Nasdaq
        National Market. If there is no closing selling price for the Common
        Stock on the date in question, then the Fair Market Value shall be the
        closing selling price on the last preceding date for which such
        quotation exists.

            (ii) If the Common Stock is at the time listed on any Stock
        Exchange, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question on the Stock Exchange
        determined by the Plan Administrator to be the primary market for the
        Common Stock, as such price is officially quoted in the composite tape
        of transactions on such exchange. If there is no closing selling price
        for the Common Stock on the date in question, then the Fair Market Value
        shall be the closing selling price on the last preceding date for which
        such quotation exists.

        L. GRANT DATE shall mean the date of grant of the option as specified in
the Grant Notice.

        M. GRANT NOTICE shall mean the Notice of Grant of Stock Option
accompanying the Agreement, pursuant to which Optionee has been informed of the
basic terms of the option evidenced hereby.

        N. INCENTIVE OPTION shall mean an option which satisfies the
requirements of Code Section 422.

        O. INVOLUNTARY TERMINATION shall mean the termination of Optionee's
Service which occurs by reason of:

             (i) Optionee's involuntary dismissal or discharge by the 
        Corporation for reasons other than Misconduct, or

            (ii) Optionee's voluntary resignation following (A) a change in
        Optionee's position with the Corporation (or Parent or Subsidiary
        employing Optionee) which materially reduces Optionee's duties and
        responsibilities, (B) a reduction in Optionee's level of compensation
        (including base salary, fringe benefits and target bonuses under any
        corporate performance-based bonus or incentive programs) by more than
        fifteen percent (15%) or (C) a relocation of Optionee's place of
        employment by more than fifty (50) miles, provided and only if such
        change, reduction or relocation is effected by the Corporation without
        Optionee's consent.


                                      A-2.

<PAGE>   12



        P. MISCONDUCT shall mean the commission of any act of fraud,
embezzlement or dishonesty by Optionee, any unauthorized use or disclosure by
Optionee of confidential information or trade secrets of the Corporation (or any
Parent or Subsidiary), or any other intentional misconduct by Optionee adversely
affecting the business or affairs of the Corporation (or any Parent or
Subsidiary) in a material manner. The foregoing definition shall not be deemed
to be inclusive of all the acts or omissions which the Corporation (or any
Parent or Subsidiary) may consider as grounds for the dismissal or discharge of
Optionee or any other individual in the Service of the Corporation (or any
Parent or Subsidiary).

        Q. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
requirements of Code Section 422.

        R. NOTICE OF EXERCISE shall mean the notice of exercise in the form
attached hereto as Exhibit I.

        S. OPTION SHARES shall mean the number of shares of Common Stock subject
to the option as specified in the Grant Notice.

        T. OPTIONEE shall mean the person to whom the option is granted as
specified in the Grant Notice.

        U. PARENT shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

        V. PERMANENT DISABILITY shall mean the inability of Optionee to engage
in any substantial gainful activity by reason of any medically determinable
physical or mental impairment which is expected to result in death or has lasted
or can be expected to last for a continuous period of twelve (12) months or
more.

        W. PLAN shall mean the Corporation's 1997 Stock Incentive Plan.

        X. PLAN ADMINISTRATOR shall mean either the Board or a committee of the
Board acting in its administrative capacity under the Plan.

        Y. SERVICE shall mean the Optionee's performance of services for the
Corporation (or any Parent or Subsidiary) in the capacity of an Employee, a
non-employee member of the board of directors or a consultant or independent
advisor.

        Z. STOCK EXCHANGE shall mean the American Stock Exchange or the New York
Stock Exchange.


                                      A-3.

<PAGE>   13


        AA. SUBSIDIARY shall mean any corporation (other than the Corporation)
in an unbroken chain of corporations beginning with the Corporation, provided
each corporation (other than the last corporation) in the unbroken chain owns,
at the time of the determination, stock possessing fifty percent (50%) or more
of the total combined voting power of all classes of stock in one of the other
corporations in such chain. If this option is designated a Non-Statutory Option
in the Grant Notice, Subsidiary shall also include any corporation, partnership,
joint-venture or other business entity in which the Corporation owns, directly
or indirectly, stock or a capital or profit interest.


                                      A-4.




<PAGE>   1
                                                                    EXHIBIT 99.4

                               ACT NETWORKS, INC.
                         NOTICE OF GRANT OF STOCK OPTION

               Notice is hereby given of the following option grant (the
"Option") to purchase shares of the Common Stock of ACT Networks, Inc. (the
"Corporation"):

               Optionee: ______________________________________________________

               Grant Date:_____________________________________________________

               Vesting Commencement Date:______________________________________

               Exercise Price:  $ ___________________ per share

               Number of Option Shares:________________ shares

               Expiration Date:________________________________________________

               Type of Option:  ___    Incentive Stock Option
                                ___    Non-Statutory Stock Option

               Date Exercisable:  Immediately Exercisable

               Vesting Schedule: The Option Shares shall be initially unvested
               and subject to repurchase by the Corporation at the Exercise
               Price paid per share. Optionee shall acquire a vested interest
               in, and the Corporation's repurchase right shall accordingly
               lapse with respect to, (i) twenty four percent (24%) of the
               Option Shares upon Optionee's completion of one (1) year of
               Service measured from the Vesting Commencement Date and (ii) the
               balance of the Option Shares in a series of thirty-eight (38)
               successive equal monthly installments upon Optionee's completion
               of each additional month of Service over the thirty-eight
               (38)-month period measured from the first anniversary of the
               Vesting Commencement Date. In no event shall any additional
               Option Shares vest after Optionee's cessation of Service.

               Optionee understands and agrees that the Option is granted
subject to and in accordance with the terms of the ACT Networks, Inc. 1997 Stock
Incentive Plan (the "Plan"). Optionee further agrees to be bound by the terms of
the Plan and the terms of the Option as set forth in the Stock Option Agreement
attached hereto as Exhibit A. Optionee understands that any unvested Option
Shares purchased under the Option will be subject to the terms set forth in the
Stock Purchase Agreement attached hereto as Exhibit B.



<PAGE>   2



               Optionee hereby further acknowledges receipt of a copy of the
official prospectus for the Plan in the form attached hereto as Exhibit C. A
copy of the Plan is available upon request made to the Corporate Secretary at
the Corporation's principal offices.

               REPURCHASE RIGHTS. OPTIONEE HEREBY AGREES THAT ALL UNVESTED
OPTION SHARES ACQUIRED UPON THE EXERCISE OF THE OPTION SHALL BE SUBJECT TO
CERTAIN REPURCHASE RIGHTS EXERCISABLE BY THE CORPORATION AND ITS ASSIGNS. THE
TERMS OF SUCH RIGHTS ARE SPECIFIED IN THE ATTACHED STOCK PURCHASE AGREEMENT.

               No Employment or Service Contract. Nothing in this Notice or in
the attached Stock Option Agreement or in the Plan shall confer upon Optionee
any right to continue in Service for any period of specific duration or
interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or Subsidiary employing or retaining Optionee) or of Optionee,
which rights are hereby expressly reserved by each, to terminate Optionee's
Service at any time for any reason, with or without cause.

               Definitions. All capitalized terms in this Notice shall have the
meaning assigned to them in this Notice or in the attached Stock Option
Agreement.

DATED:______________________ , 199 __


                                         ACT NETWORKS, INC.


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

                                         Title:
                                              ----------------------------------

                                         ---------------------------------------
                                                       OPTIONEE

                                         Address:
                                                 -------------------------------

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

ATTACHMENTS
EXHIBIT A - STOCK OPTION AGREEMENT
EXHIBIT B - STOCK PURCHASE AGREEMENT
EXHIBIT C - PLAN SUMMARY AND PROSPECTUS



                                       2.

<PAGE>   3



                                    EXHIBIT A

                             STOCK OPTION AGREEMENT




<PAGE>   4



                                    EXHIBIT B

                            STOCK PURCHASE AGREEMENT


<PAGE>   5


                                    EXHIBIT C

                           PLAN SUMMARY AND PROSPECTUS




<PAGE>   1
                                                                    EXHIBIT 99.5

                                                                   OFFICER GRANT


                               ACT NETWORKS, INC.
                             STOCK OPTION AGREEMENT


RECITALS

        A.     The Board has adopted the Plan for the purpose of retaining the
services of selected Employees, non-employee members of the Board or the board
of directors of any Parent or Subsidiary and consultants and other independent
advisors who provide services to the Corporation (or any Parent or Subsidiary).

        B.     Optionee is to render valuable services to the Corporation (or a
Parent or Subsidiary), and this Agreement is executed pursuant to, and is
intended to carry out the purposes of, the Plan in connection with the
Corporation's grant of an option to Optionee.

        C.     All capitalized terms in this Agreement shall have the meaning
assigned to them in the attached Appendix.

               NOW, THEREFORE, it is hereby agreed as follows:

               1. GRANT OF OPTION. The Corporation hereby grants to Optionee, as
of the Grant Date, an option to purchase up to the number of Option Shares
specified in the Grant Notice. The Option Shares shall be purchasable from time
to time during the option term specified in Paragraph 2 at the Exercise Price.

               2. OPTION TERM. This option shall have a term of ten (10) years
measured from the Grant Date and shall accordingly expire at the close of
business on the Expiration Date, unless sooner terminated in accordance with
Paragraph 5 or 6.

               3. LIMITED TRANSFERABILITY. This option shall be neither
transferable nor assignable by Optionee other than by will or by the laws of
descent and distribution following Optionee's death and may be exercised, during
Optionee's lifetime, only by Optionee. However, if this option is designated a
Non-Statutory Option in the Grant Notice, then this option may also be assigned
in whole or in part during the Optionee's lifetime to one or more members of the
Optionee's immediate family or to a trust established exclusively for one or
more such family members. The assigned portion may only be exercised by the
person or persons who acquire a proprietary interest in the option pursuant to
the assignment. The terms applicable to the assigned portion shall be the same
as those in effect for the option immediately prior to such assignment and shall
be set forth in such documents issued to the assignee as the Plan Administrator
may deem appropriate.



<PAGE>   2



               4. DATES OF EXERCISE. This option shall become exercisable for
the Option Shares in one or more installments as specified in the Grant Notice.
As the option becomes exercisable for such installments, those installments
shall accumulate, and the option shall remain exercisable for the accumulated
installments until the Expiration Date or sooner termination of the option term
under Paragraph 5 or 6.

               5. CESSATION OF SERVICE. The option term specified in Paragraph 2
shall terminate (and this option shall cease to be outstanding) prior to the
Expiration Date should any of the following provisions become applicable:

                           (i) Should Optionee cease to remain in Service for
        any reason (other than death, Permanent Disability or Misconduct) while
        this option is outstanding, then the period during which this option may
        be exercised shall be limited to the three (3)-month period commencing
        with the date of such cessation of Service, but in no event shall this
        option be exercisable at any time after the Expiration Date.

                          (ii) Should Optionee die while holding this option,
        then the personal representative of Optionee's estate or the person or
        persons to whom the option is transferred pursuant to Optionee's will or
        in accordance with the laws of descent and distribution shall have the
        right to exercise this option. Such right shall lapse, and this option
        shall cease to be outstanding upon the earlier of (A) the expiration of
        the twelve (12)-month period measured from the date of Optionee's death
        or (B) the Expiration Date.

                         (iii) Should Optionee cease Service by reason of
        Permanent Disability while this option is outstanding, then the period
        during which this option may be exercised shall be limited to the twelve
        (12)-month period commencing with the date of such cessation of Service.
        In no event shall this option be exercisable at any time after the
        Expiration Date.

                          (iv) Should Optionee's Service be terminated for
        Misconduct, then this option shall terminate immediately and cease to
        remain outstanding.

                           (v) During the limited period of post-Service
        exercisability, this option may not be exercised in the aggregate for
        more than the number of Option Shares in which Optionee is vested at the
        time of his or her cessation of Service. Upon the expiration of such
        limited exercise period or (if earlier) upon the Expiration Date, this
        option shall terminate and cease to be outstanding for any vested Option
        Shares for which the option has not otherwise been exercised. To the
        extent Optionee is not vested in one or more Option Shares at the time
        of his or her cessation of Service, this option shall immediately
        terminate and cease to be outstanding with respect to those unvested
        shares.

                                       2.

<PAGE>   3





                          (vi) In the event of a Corporate Transaction, the
        provisions of Paragraph 6 shall govern the period for which this option
        is to remain exercisable following Optionee's cessation of Service and
        shall supersede any provisions to the contrary in this Paragraph 5.

               6.     SPECIAL ACCELERATION OF OPTION.

                      (a) In the event of any Corporate Transaction, the Option
Shares at the time subject to this option but not otherwise vested shall
automatically vest in full so that this option shall, immediately prior to the
effective date of the Corporate Transaction, become exercisable for all of the
Option Shares as fully-vested shares and may be exercised for any or all of
those vested Option Shares. However, the Option Shares shall NOT vest on such an
accelerated basis if and to the extent: (i) this option is assumed by the
successor corporation (or parent thereof) in the Corporate Transaction and the
Corporation's repurchase rights with respect to the unvested Option Shares are
assigned to such successor corporation (or parent thereof) or (ii) this option
is to be replaced with a cash incentive program of the successor corporation
which preserves the spread existing on the unvested Option Shares at the time of
the Corporate Transaction (the excess of the Fair Market Value of those Option
Shares over the Exercise Price payable for such shares) and provides for
subsequent payout in accordance with the same Vesting Schedule applicable to
those unvested Option Shares as set forth in the Grant Notice.

                      (b) Immediately following the Corporate Transaction, this
option shall terminate and cease to be outstanding, except to the extent assumed
by the successor corporation (or parent thereof) in connection with the
Corporate Transaction.

                      (c) If this option is assumed in connection with a
Corporate Transaction, then this option shall be appropriately adjusted,
immediately after such Corporate Transaction, to apply to the number and class
of securities which would have been issuable to Optionee in consummation of such
Corporate Transaction had the option been exercised immediately prior to such
Corporate Transaction, and appropriate adjustments shall also be made to the
Exercise Price, provided the aggregate Exercise Price shall remain the same.

                      (d) Upon an Involuntary Termination of Optionee's Service
within eighteen (18) months following a Corporate Transaction in which this
option is assumed and the repurchase rights for the unvested Option Shares are
assigned, all the Option Shares at the time subject to this option but not
otherwise vested shall automatically vest in full and the repurchase rights
shall immediately lapse so that this option shall immediately become exercisable
for all of the Option Shares as fully-vested shares and may be exercised for any
or all of those vested Option Shares. The option shall remain exercisable for
such vested Option Shares until the earlier of (i) the Expiration Date or (ii)
the expiration of the one (1)-year period measured from the effective date of
the Involuntary Termination, whereupon the option shall terminate and cease to
be outstanding.


                                       3.

<PAGE>   4



                      (e) This Agreement shall not in any way affect the right
of the Corporation to adjust, reclassify, reorganize or otherwise change its
capital or business structure or to merge, consolidate, dissolve, liquidate or
sell or transfer all or any part of its business or assets.

               7.     ADJUSTMENT IN OPTION SHARES. Should any change be made to
the Common Stock by reason of any stock split, stock dividend, recapitalization,
combination of shares, exchange of shares or other change affecting the
outstanding Common Stock as a class without the Corporation's receipt of
consideration, appropriate adjustments shall be made to (i) the total number
and/or class of securities subject to this option and (ii) the Exercise Price in
order to reflect such change and thereby preclude a dilution or enlargement of
benefits hereunder.

               8.     STOCKHOLDER RIGHTS. The holder of this option shall not
have any stockholder rights with respect to the Option Shares until such person
shall have exercised the option, paid the Exercise Price and become a holder of
record of the purchased shares.

               9.     MANNER OF EXERCISING OPTION.

                      (a) In order to exercise this option with respect to all
or any part of the Option Shares for which this option is at the time
exercisable, Optionee (or any other person or persons exercising the option)
must take the following actions:

                                  (i) To the extent the option is exercised for
        vested Option Shares, execute and deliver to the Corporation a Notice of
        Exercise for the vested Option Shares for which the option is exercised.
        To the extent the option is exercised for unvested Option Shares,
        execute and deliver to the Corporation a Purchase Agreement for the
        unvested Option Shares for which the option is exercised.

                                 (ii) Pay the aggregate Exercise Price for the
        purchased shares in one or more of the following forms:

                                    (A) cash or check made payable to the
               Corporation;

                                    (B) a promissory note payable to the 
               Corporation, but only to the extent authorized by the Plan 
               Administrator in accordance with Paragraph 13;

                                    (C) shares of Common Stock held by Optionee
               (or any other person or persons exercising the option) for the
               requisite period necessary to avoid a charge to the Corporation's
               earnings for financial reporting purposes and valued at Fair
               Market Value on the Exercise Date; or

                                       4.

<PAGE>   5




                                    (D) to the extent the option is exercised
               for vested Option Shares, through a special sale and remittance
               procedure pursuant to which Optionee (or any other person or
               persons exercising the option) shall concurrently provide
               irrevocable instructions (I) to a Corporation-designated
               brokerage firm to effect the immediate sale of the purchased
               shares and remit to the Corporation, out of the sale proceeds
               available on the settlement date, sufficient funds to cover the
               aggregate Exercise Price payable for the purchased shares plus
               all applicable Federal, state and local income and employment
               taxes required to be withheld by the Corporation by reason of
               such exercise and (II) to the Corporation to deliver the
               certificates for the purchased shares directly to such brokerage
               firm in order to complete the sale.

                      Except to the extent the sale and remittance procedure is
               utilized in connection with the option exercise, payment of the
               Exercise Price must accompany the Notice of Exercise or Purchase
               Agreement delivered to the Corporation in connection with the
               option exercise.

                                (iii) Furnish to the Corporation appropriate
        documentation that the person or persons exercising the option (if other
        than Optionee) have the right to exercise this option.

                                 (iv) Make appropriate arrangements with the
        Corporation (or Parent or Subsidiary employing or retaining Optionee)
        for the satisfaction of all Federal, state and local income and
        employment tax withholding requirements applicable to the option
        exercise.

                      (b) As soon as practical after the Exercise Date, the
Corporation shall issue to or on behalf of Optionee (or any other person or
persons exercising this option) a certificate for the purchased Option Shares,
with the appropriate legends affixed thereto.

                      (c) In no event may this option be exercised for any
fractional shares.

               10. COMPLIANCE WITH LAWS AND REGULATIONS.

                      (a) The exercise of this option and the issuance of the
Option Shares upon such exercise shall be subject to compliance by the
Corporation and Optionee with all applicable requirements of law relating
thereto and with all applicable regulations of any stock exchange (or the Nasdaq
National Market, if applicable) on which the Common Stock may be listed for
trading at the time of such exercise and issuance.


                                       5.



<PAGE>   6



                      (b) The inability of the Corporation to obtain approval
from any regulatory body having authority deemed by the Corporation to be
necessary to the lawful issuance and sale of any Common Stock pursuant to this
option shall relieve the Corporation of any liability with respect to the
non-issuance or sale of the Common Stock as to which such approval shall not
have been obtained. The Corporation, however, shall use its best efforts to
obtain all such approvals.

               11. SUCCESSORS AND ASSIGNS. Except to the extent otherwise
provided in Paragraphs 3 and 6, the provisions of this Agreement shall inure to
the benefit of, and be binding upon, the Corporation and its successors and
assigns and Optionee, Optionee's assigns and the legal representatives, heirs
and legatees of Optionee's estate.

               12. NOTICES. Any notice required to be given or delivered to the
Corporation under the terms of this Agreement shall be in writing and addressed
to the Corporation at its principal corporate offices. Any notice required to be
given or delivered to Optionee shall be in writing and addressed to Optionee at
the address indicated below Optionee's signature line on the Grant Notice. All
notices shall be deemed effective upon personal delivery or upon deposit in the
U.S. mail, postage prepaid and properly addressed to the party to be notified.

               13. FINANCING. The Plan Administrator may, in its absolute
discretion and without any obligation to do so, permit Optionee to pay the
Exercise Price for the purchased Option Shares by delivering a promissory note.
The terms of any such promissory note (including the interest rate, the
requirements for collateral and the terms of repayment) shall be established by
the Plan Administrator in its sole discretion.

               14. CONSTRUCTION. This Agreement and the option evidenced hereby
are made and granted pursuant to the Plan and are in all respects limited by and
subject to the terms of the Plan. All decisions of the Plan Administrator with
respect to any question or issue arising under the Plan or this Agreement shall
be conclusive and binding on all persons having an interest in this option.

               15. GOVERNING LAW. The interpretation, performance and
enforcement of this Agreement shall be governed by the laws of the State of
California without resort to that State's conflict-of-laws rules.

               16. EXCESS SHARES. If the Option Shares covered by this Agreement
exceed, as of the Grant Date, the number of shares of Common Stock which may
without stockholder approval be issued under the Plan, then this option shall be
void with respect to such excess shares, unless stockholder approval of an
amendment sufficiently increasing the number of shares of Common Stock issuable
under the Plan is obtained in accordance with the provisions of the Plan.


                                       6.

<PAGE>   7



               17. ADDITIONAL TERMS APPLICABLE TO AN INCENTIVE OPTION. In the
event this option is designated an Incentive Option in the Grant Notice, the
following terms and conditions shall also apply to the grant:

                                (i) This option shall cease to qualify for
        favorable tax treatment as an Incentive Option if (and to the extent)
        this option is exercised for one or more Option Shares: (A) more than
        three (3) months after the date Optionee ceases to be an Employee for
        any reason other than death or Permanent Disability or (B) more than
        twelve (12) months after the date Optionee ceases to be an Employee by
        reason of Permanent Disability.

                                (ii) This option shall not become exercisable in
        the calendar year in which granted if (and to the extent) the aggregate
        Fair Market Value (determined at the Grant Date) of the Common Stock for
        which this option would otherwise first become exercisable in such
        calendar year would, when added to the aggregate value (determined as of
        the respective date or dates of grant) of the Common Stock and any other
        securities for which one or more other Incentive Options granted to
        Optionee prior to the Grant Date (whether under the Plan or any other
        option plan of the Corporation or any Parent or Subsidiary) first become
        exercisable during the same calendar year, exceed One Hundred Thousand
        Dollars ($100,000) in the aggregate. To the extent the exercisability of
        this option is deferred by reason of the foregoing limitation, the
        deferred portion shall become exercisable in the first calendar year or
        years thereafter in which the One Hundred Thousand Dollar ($100,000)
        limitation of this Paragraph 17(b) would not be contravened, but such
        deferral shall in all events end immediately prior to the effective date
        of a Corporate Transaction in which this option is not to be assumed,
        whereupon the option shall become immediately exercisable as a
        Non-Statutory Option for the deferred portion of the Option Shares.

                                (iii) Should Optionee hold, in addition to this
        option, one or more other options to purchase Common Stock which become
        exercisable for the first time in the same calendar year as this option,
        then the foregoing limitations on the exercisability of such options as
        Incentive Options shall be applied on the basis of the order in which
        such options are granted.

                                       7.

<PAGE>   8



                                    EXHIBIT I

                               NOTICE OF EXERCISE


               I hereby notify ACT Networks, Inc. (the "Corporation") that I
elect to purchase _______________ shares of the Corporation's Common Stock (the
"Purchased Shares") at the option exercise price of $_______ per share (the
"Exercise Price") pursuant to that certain option (the "Option") granted to me
under the Corporation's 1997 Stock Incentive Plan on __________________ , 199 .

               Concurrently with the delivery of this Exercise Notice to the
Corporation, I shall hereby pay to the Corporation the Exercise Price for the
Purchased Shares in accordance with the provisions of my agreement with the
Corporation (or other documents) evidencing the Option and shall deliver
whatever additional documents may be required by such agreement as a condition
for exercise. Alternatively, I may utilize the special broker-dealer sale and
remittance procedure specified in my agreement to effect payment of the Exercise
Price for any Purchased Shares in which I am vested at the time of exercise of
the Option.


__________________________  , 199__
Date

                                    --------------------------------------------
                                    Optionee

                                    Address:
                                            ------------------------------------


Print name in exact manner
it is to appear on the
stock certificate:                  --------------------------------------------

Address to which certificate
is to be sent, if different
from address above:                 --------------------------------------------

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

Social Security Number:             --------------------------------------------

Employee Number:                    --------------------------------------------




<PAGE>   9



                                    APPENDIX


               The following definitions shall be in effect under the Agreement:

        A. AGREEMENT shall mean this Stock Option Agreement.

        B. BOARD shall mean the Corporation's Board of Directors.

        C. CODE shall mean the Internal Revenue Code of 1986, as amended.

        D. COMMON STOCK shall mean the Corporation's common stock.

        E. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

             (i) a merger or consolidation in which securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction, or

            (ii) the sale, transfer or other disposition of all or substantially
        all of the Corporation's assets in complete liquidation or dissolution
        of the Corporation.

        F. CORPORATION shall mean ACT Networks, Inc., a Delaware corporation.

        G. EMPLOYEE shall mean an individual who is in the employ of the
Corporation (or any Parent or Subsidiary), subject to the control and direction
of the employer entity as to both the work to be performed and the manner and
method of performance.

        H. EXERCISE DATE shall mean the date on which the option shall have been
exercised in accordance with Paragraph 9 of the Agreement.

        I. EXERCISE PRICE shall mean the exercise price per share as specified 
in the Grant Notice.

        J. EXPIRATION DATE shall mean the date on which the option expires as 
specified in the Grant Notice.

        K. FAIR MARKET VALUE per share of Common Stock on any relevant date
shall be determined in accordance with the following provisions:


                                      A-1.

<PAGE>   10



             (i) If the Common Stock is at the time traded on the Nasdaq
        National Market, then the Fair Market Value shall be the closing selling
        price per share of Common Stock on the date in question, as the price is
        reported by the National Association of Securities Dealers on the Nasdaq
        National Market. If there is no closing selling price for the Common
        Stock on the date in question, then the Fair Market Value shall be the
        closing selling price on the last preceding date for which such
        quotation exists.

            (ii) If the Common Stock is at the time listed on any Stock
        Exchange, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question on the Stock Exchange
        determined by the Plan Administrator to be the primary market for the
        Common Stock, as such price is officially quoted in the composite tape
        of transactions on such exchange. If there is no closing selling price
        for the Common Stock on the date in question, then the Fair Market Value
        shall be the closing selling price on the last preceding date for which
        such quotation exists.

        L. GRANT DATE shall mean the date of grant of the option as specified in
the Grant Notice.

        M. GRANT NOTICE shall mean the Notice of Grant of Stock Option
accompanying the Agreement, pursuant to which Optionee has been informed of the
basic terms of the option evidenced hereby.

        N. INCENTIVE OPTION shall mean an option which satisfies the
requirements of Code Section 422.

        O. INVOLUNTARY TERMINATION shall mean the termination of Optionee's
Service which occurs by reason of:

             (i) Optionee's involuntary dismissal or discharge by the 
        Corporation for reasons other than Misconduct, or

            (ii) Optionee's voluntary resignation following (A) a change in
        Optionee's position with the Corporation (or Parent or Subsidiary
        employing Optionee) which materially reduces Optionee's duties and
        responsibilities, (B) a reduction in Optionee's level of compensation
        (including base salary, fringe benefits and target bonuses under any
        corporate performance-based bonus or incentive programs) by more than
        fifteen percent (15%) or (C) a relocation of Optionee's place of
        employment by more than fifty (50) miles, provided and only if such
        change, reduction or relocation is effected by the Corporation without
        Optionee's consent.


                                      A-2.

<PAGE>   11



        P. MISCONDUCT shall mean the commission of any act of fraud,
embezzlement or dishonesty by Optionee, any unauthorized use or disclosure by
Optionee of confidential information or trade secrets of the Corporation (or any
Parent or Subsidiary), or any other intentional misconduct by Optionee adversely
affecting the business or affairs of the Corporation (or any Parent or
Subsidiary) in a material manner. The foregoing definition shall not be deemed
to be inclusive of all the acts or omissions which the Corporation (or any
Parent or Subsidiary) may consider as grounds for the dismissal or discharge of
Optionee or any other individual in the Service of the Corporation (or any
Parent or Subsidiary).

        Q. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
requirements of Code Section 422.

        R. NOTICE OF EXERCISE shall mean the notice of exercise in the form
attached hereto as Exhibit I.

        S. OPTION SHARES shall mean the number of shares of Common Stock subject
to the option as specified in the Grant Notice.

        T. OPTIONEE shall mean the person to whom the option is granted as
specified in the Grant Notice.

        U. PARENT shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

        V. PERMANENT DISABILITY shall mean the inability of Optionee to engage
in any substantial gainful activity by reason of any medically determinable
physical or mental impairment which is expected to result in death or has lasted
or can be expected to last for a continuous period of twelve (12) months or
more.

        W. PLAN shall mean the Corporation's 1997 Stock Incentive Plan.

        X. PLAN ADMINISTRATOR shall mean either the Board or a committee of the
Board acting in its administrative capacity under the Plan.

        Y. PURCHASE AGREEMENT shall mean the stock purchase agreement in
substantially the form of Exhibit B to the Grant Notice which is to be executed
in connection with the purchase of unvested Option Shares.

        Z. SERVICE shall mean the Optionee's performance of services for the
Corporation (or any Parent or Subsidiary) in the capacity of an Employee, a
non-employee member of the board of directors or a consultant or independent
advisor.

                                      A-3.

<PAGE>   12




        AA. STOCK EXCHANGE shall mean the American Stock Exchange or the New 
York Stock Exchange.

        AB. SUBSIDIARY shall mean any corporation (other than the Corporation)
in an unbroken chain of corporations beginning with the Corporation, provided
each corporation (other than the last corporation) in the unbroken chain owns,
at the time of the determination, stock possessing fifty percent (50%) or more
of the total combined voting power of all classes of stock in one of the other
corporations in such chain. If this option is designated a Non-Statutory Option
in the Grant Notice, Subsidiary shall also include any corporation, partnership,
joint-venture or other business entity in which the Corporation owns, directly
or indirectly, stock or a capital or profit interest.

        AC. VESTING SCHEDULE shall mean the vesting schedule specified in the
Grant Notice pursuant to which the Optionee is to vest in the Option Shares in a
series of installments over his or her period of Service.

                                      A-4.




<PAGE>   1
                                                                    EXHIBIT 99.6

                                    ADDENDUM
                                       TO
                             STOCK OPTION AGREEMENT


               The following provisions are hereby incorporated into, and are
hereby made a part of, that certain Stock Option Agreement dated (the "Option
Agreement") by and between ACT Networks, Inc. (the "Corporation") and _________ 
("Optionee") evidencing the stock option (the "Option") granted on such date to
Optionee under the terms of the Corporation's 1997 Stock Incentive Plan, and
such provisions shall be effective immediately. All capitalized terms in this
Addendum, to the extent not otherwise defined herein, shall have the meanings
assigned to them in the Option Agreement.

                        LIMITED STOCK APPRECIATION RIGHT

               1. Optionee is hereby granted a limited stock appreciation right
in tandem with the Option, exercisable upon the terms set forth below:

                    (i) Optionee shall have the unconditional right, exercisable
        at any time during the thirty (30)-day period following a Hostile
        Take-Over, to surrender the Option to the Corporation, to the extent the
        Option is at the time exercisable for one or more Option Shares. In
        return for the surrendered Option, Optionee shall receive a cash
        distribution from the Corporation in an amount equal to the excess of
        (A) the Take-Over Price of the Option Shares for which the surrendered
        Option (or surrendered portion) is at the time exercisable over (B) the
        aggregate Exercise Price payable for those shares.

                   (ii) To exercise this limited stock appreciation right,
        Optionee must, during the applicable thirty (30)-day exercise period,
        provide the Corporation with written notice of the option surrender in
        which there is specified the number of Option Shares as to which the
        option is being surrendered. Such notice must be accompanied by the
        return of Optionee's copy of the Option Agreement, together with any
        written amendments to such Agreement. The cash distribution shall be
        paid to Optionee within five (5) days following such delivery date. The
        exercise of such limited stock appreciation right in accordance with the
        terms of this Addendum is hereby pre-approved by the Plan Administrator,
        and no further approval of the Plan Administrator or the Board shall be
        required at the time of the actual option surrender or cash
        distribution. Upon receipt of the cash distribution, the Option shall be
        cancelled with respect to the Option Shares for which the Option has
        been surrendered, and Optionee shall cease to have any further right to
        acquire those Option Shares under the Option Agreement. The


<PAGE>   2



        Option shall, however, remain outstanding and exercisable for the
        balance of the Option Shares (if any) in accordance with the terms of
        the Option Agreement, and the Corporation shall issue a replacement
        stock option agreement (substantially in the same form of the
        surrendered Option Agreement) for those remaining Option Shares.

                  (iii) In no event may this limited stock appreciation right be
        exercised when there is not a positive spread between the Fair Market
        Value of the Option Shares and the aggregate Exercise Price payable for
        such shares. This limited stock appreciation right shall in all events
        terminate upon the expiration or sooner termination of the option term
        and may not be assigned or transferred by Optionee.

               2. For purposes of this Addendum, the following definitions shall
be in effect:

                    (i) A HOSTILE TAKE-OVER shall be deemed to occur in the
        event any person or related group of persons (other than the Corporation
        or a person that directly or indirectly controls, is controlled by, or
        is under common control with, the Corporation) directly or indirectly
        acquires beneficial ownership (within the meaning of Rule 13d-3 of the
        Securities Exchange Act of 1934, as amended) of securities possessing
        more than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities pursuant to a tender or exchange
        offer made directly to the Corporation's stockholders which the Board
        does not recommend such stockholders to accept.

                   (ii) The TAKE-OVER PRICE per share shall be deemed to be
        equal to the greater of (A) the Fair Market Value per Option Share on
        the option surrender date or (B) the highest reported price per share of
        Common Stock paid by the tender offeror in effecting the Hostile
        Take-Over. However, if the surrendered Option is designated as an
        Incentive Option in the Grant Notice, then the Take-Over Price shall not
        exceed the clause (A) price per share.


                                       2.

<PAGE>   3



               IN WITNESS WHEREOF, ACT Networks, Inc. has caused this Addendum
to be executed by its duly-authorized officer as of the Effective Date specified
below.


                                            ACT NETWORKS, INC.

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

                                            Title:
                                                 -------------------------------




EFFECTIVE DATE:____________________ , 199


                                       3.




<PAGE>   1
                                                                    EXHIBIT 99.7


                                    ADDENDUM
                                       TO
                             STOCK OPTION AGREEMENT

               The following provisions are hereby incorporated into, and are
hereby made a part of, that certain Stock Option Agreement dated _______________
(the "Option Agreement") by and between ACT Networks, Inc. (the "Corporation")
and ______________________ ("Optionee") evidencing the stock option (the
"Option") granted on such date to Optionee under the terms of the Corporation's
1997 Stock Incentive Plan, and such provisions shall be effective immediately.
All capitalized terms in this Addendum, to the extent not otherwise defined
herein, shall have the meanings assigned to them in the Option Agreement.

                        INVOLUNTARY TERMINATION FOLLOWING
                                CHANGE IN CONTROL

               1. The Option shall not accelerate upon the occurrence of a
Change in Control, and the Option shall, over Optionee's period of Service
following the Change in Control, continue to become exercisable for the Option
Shares in one or more installments in accordance with the provisions of the
Option Agreement. However, immediately upon an Involuntary Termination of
Optionee's Service within eighteen (18) months following the Change in Control,
the Option, to the extent outstanding at the time but not otherwise fully
exercisable, shall automatically accelerate so that the Option shall immediately
become exercisable for all the Option Shares at the time subject to the Option
and may be exercised for any or all of those shares as fully-vested shares of
Common Stock. The Option as so accelerated shall remain exercisable for the
vested Option Shares until the earlier of (i) the Expiration Date or (ii) the
expiration of the one (1)-year period measured from the date of the Involuntary
Termination, whereupon the Option shall terminate and cease to be outstanding.

               2. For purposes of this Addendum, a CHANGE IN CONTROL shall be
deemed to occur in the event of a change in ownership or control of the
Corporation effected through either of the following transactions:

                    (i) the acquisition, directly or indirectly, by any person
        or related group of persons (other than the Corporation or a person that
        directly or indirectly controls, is controlled by, or is under common
        control with, the Corporation) of beneficial ownership (within the
        meaning of Rule 13d-3 of the Securities Exchange Act of 1934, as
        amended) of securities possessing more than fifty percent (50%) of the
        total combined voting power of the Corporation's outstanding securities
        pursuant to a tender or exchange offer made directly to the
        Corporation's stockholders, or



<PAGE>   2


                   (ii) a change in the composition of the Board over a period
        of thirty-six (36) consecutive months or less such that a majority of
        the Board members ceases by reason of one or more contested elections
        for Board membership, to be comprised of individuals who either (A) have
        been Board members continuously since the beginning of such period or
        (B) have been elected or nominated for election as Board members during
        such period by at least a majority of the Board members described in
        clause (A) who were still in office at the time such election or
        nomination was approved by the Board.

               3. The provisions of Paragraph 1 of this Addendum shall govern
the period for which the option is to remain exercisable following the
Involuntary Termination of Optionee's Service within eighteen (18) months after
the Change in Control and shall supersede any provisions to the contrary in the
Option Agreement.

               IN WITNESS WHEREOF, ACT Networks, Inc. has caused this Addendum
to be executed by its duly-authorized officer as of the Effective Date specified
below.


                               ACT NETWORKS, INC.

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

                               Title:
                                     -------------------------------------------




EFFECTIVE DATE:____________________, 199__


                                       2.




<PAGE>   1
                                                                    EXHIBIT 99.8

                               ACT NETWORKS, INC.

                            STOCK PURCHASE AGREEMENT


               AGREEMENT made this ______ day of _______________________199__, 

by and between ACT Networks, Inc., a Delaware corporation, and_________________,
Optionee under the Corporation's 1997 Stock Incentive Plan.

               All capitalized terms in this Agreement shall have the meaning
assigned to them in this Agreement or in the attached Appendix.

        A.     EXERCISE OF OPTION

               1. EXERCISE. Optionee hereby purchases _________ shares of Common
Stock (the "Purchased Shares") pursuant to that certain option (the "Option")
granted Optionee on ____________________, 199__ (the "Grant Date") to purchase
up to _______________ shares of Common Stock (the "Option Shares") under the
Plan at the exercise price of $___________ per share (the "Exercise Price").

               2. PAYMENT. Concurrently with the delivery of this Agreement to
the Corporation, Optionee shall pay the Exercise Price for the Purchased Shares
in accordance with the provisions of the Option Agreement and shall deliver
whatever additional documents may be required by the Option Agreement as a
condition for exercise, together with a duly-executed blank Assignment Separate
from Certificate (in the form attached hereto as Exhibit I) with respect to the
Purchased Shares.

               3. STOCKHOLDER RIGHTS. Until such time as the Corporation
exercises the Repurchase Right, Optionee (or any successor in interest) shall
have all the rights of a stockholder (including voting, dividend and liquidation
rights) with respect to the Purchased Shares, subject, however, to the transfer
restrictions of Article B.

        B.     TRANSFER RESTRICTIONS

               1. RESTRICTION ON TRANSFER. Except for any Permitted Transfer,
Optionee shall not sell, transfer, assign, encumber or otherwise dispose of any
of the Purchased Shares which are subject to the Repurchase Right. The
Corporation shall not be required (i) to transfer on its books any Purchased
Shares which are transferred in violation of the provisions of this Agreement or
(ii) to treat as the owner of the Purchased Shares, or otherwise to accord
voting, dividend or liquidation rights to, any transferee to whom the Purchased
Shares have been transferred in contravention of this Agreement.




<PAGE>   2





               2. TRANSFEREE OBLIGATIONS. Each person (other than the
Corporation) to whom the Purchased Shares are transferred by means of a
Permitted Transfer must, as a condition precedent to the validity of such
transfer, acknowledge in writing to the Corporation that such person is bound by
the provisions of this Agreement and that the transferred shares are subject to
the Repurchase Right, to the same extent such shares would be so subject if
retained by Optionee.

               3. RESTRICTIVE LEGENDS. The stock certificates for the Purchased
Shares shall be endorsed with the following restrictive legend:

                      "The shares represented by this certificate are unvested
        and subject to certain repurchase rights granted to the Corporation and
        accordingly may not be sold, assigned, transferred, encumbered, or in
        any manner disposed of except in conformity with the terms of a written
        agreement dated _____________ , 199__ between the Corporation and the
        registered holder of the shares (or the predecessor in interest to the
        shares). A copy of such agreement is maintained at the Corporation's
        principal corporate offices."

        C.     REPURCHASE RIGHT

               1. GRANT. The Corporation is hereby granted the right (the
"Repurchase Right"), exercisable at any time during the ninety (90)-day period
following the date Optionee ceases for any reason to remain in Service or (if
later) during the ninety (90)-day period following the execution date of this
Agreement, to repurchase at the Exercise Price any or all of the Purchased
Shares in which Optionee is not, at the time of his or her cessation of Service,
vested in accordance with the Vesting Schedule applicable to those shares or the
special vesting acceleration provisions of Paragraph C.6 of this Agreement (such
shares to be hereinafter referred to as the "Unvested Shares").

               2. EXERCISE OF THE REPURCHASE RIGHT. The Repurchase Right shall
be exercisable by written notice delivered to each Owner of the Unvested Shares
prior to the expiration of the ninety (90)-day exercise period. The notice shall
indicate the number of Unvested Shares to be repurchased and the date on which
the repurchase is to be effected, such date to be not more than thirty (30) days
after the date of such notice. The certificates representing the Unvested Shares
to be repurchased shall be delivered to the Corporation on or before the close
of business on the date specified for the repurchase. On the scheduled closing
date, the Corporation shall, concurrently with the receipt of such stock
certificates, pay to Owner, in cash or cash equivalents (including the
cancellation of any purchase-money indebtedness), an amount equal to the
Exercise Price previously paid for the Unvested Shares which are to be
repurchased from Owner.



                                       2.

<PAGE>   3



               3. TERMINATION OF THE REPURCHASE RIGHT. The Repurchase Right
shall terminate with respect to any Unvested Shares for which it is not timely
exercised under Paragraph C.2. In addition, the Repurchase Right shall terminate
and cease to be exercisable with respect to any and all Purchased Shares in
which Optionee vests in accordance with the Vesting Schedule.

               4. AGGREGATE VESTING LIMITATION. If the Option is exercised in
more than one increment so that Optionee is a party to one or more other Stock
Purchase Agreements (the "Prior Purchase Agreements") which are executed prior
to the date of this Agreement, then the total number of Purchased Shares as to
which Optionee shall be deemed to have a fully-vested interest under this
Agreement and all Prior Purchase Agreements shall not exceed in the aggregate
the number of Purchased Shares in which Optionee would otherwise at the time be
vested, in accordance with the Vesting Schedule, had all the Purchased Shares
(including those acquired under the Prior Purchase Agreements) been acquired
exclusively under this Agreement.

               5. RECAPITALIZATION. Any new, substituted or additional
securities or other property (including cash paid other than as a regular cash
dividend) which is by reason of any Recapitalization distributed with respect to
the Purchased Shares shall be immediately subject to the Repurchase Right and
any escrow requirements hereunder, but only to the extent the Purchased Shares
are at the time covered by such right or escrow requirements. Appropriate
adjustments to reflect such distribution shall be made to the number and/or
class of Purchased Shares subject to this Agreement and to the price per share
to be paid upon the exercise of the Repurchase Right in order to reflect the
effect of any such Recapitalization upon the Corporation's capital structure;
provided, however, that the aggregate purchase price shall remain the same.

               6. CORPORATE TRANSACTION.

                      (a) The Repurchase Right shall automatically terminate in
its entirety, and all the Purchased Shares shall vest in full, immediately prior
to the consummation of any Corporate Transaction, except to the extent the
Repurchase Right is to be assigned to the successor entity in such Corporate
Transaction.

                      (b) To the extent the Repurchase Right remains in effect
following a Corporate Transaction, such right shall apply to any new securities
or other property (including any cash payments) received in exchange for the
Purchased Shares in consummation of the Corporate Transaction, but only to the
extent the Purchased Shares are at the time covered by such right. Appropriate
adjustments shall be made to the price per share payable upon exercise of the
Repurchase Right to reflect the effect of the Corporate Transaction upon the
Corporation's capital structure; provided, however, that the aggregate purchase
price shall remain the same. The new securities or other property (including any
cash payments) issued or distributed with 


                                       3.
<PAGE>   4

respect to the Purchased Shares in consummation of the Corporate Transaction
shall be immediately deposited in escrow with the Corporation (or the successor
entity) and shall not be released from escrow until Optionee vests in such
securities or other property in accordance with the same Vesting Schedule in
effect for the Purchased Shares.

                      (c) The Repurchase Right may also terminate on an
accelerated basis, and the Purchased Shares shall immediately vest in full, in
accordance with the terms and conditions of any special addendum attached to
this Agreement.

        D.     SPECIAL TAX ELECTION

               The acquisition of the Purchased Shares may result in adverse tax
consequences which may be avoided or mitigated by filing an election under Code
Section 83(b). Such election must be filed within thirty (30) days after the
date of this Agreement. A description of the tax consequences applicable to the
acquisition of the Purchased Shares and the form for making the Code Section
83(b) election are set forth in Exhibit II. OPTIONEE SHOULD CONSULT WITH HIS OR
HER TAX ADVISOR TO DETERMINE THE TAX CONSEQUENCES OF ACQUIRING THE PURCHASED
SHARES AND THE ADVANTAGES AND DISADVANTAGES OF FILING THE CODE SECTION 83(B)
ELECTION. OPTIONEE ACKNOWLEDGES THAT IT IS OPTIONEE'S SOLE RESPONSIBILITY, AND
NOT THE CORPORATION'S, TO FILE A TIMELY ELECTION UNDER CODE SECTION 83(B), EVEN
IF OPTIONEE REQUESTS THE CORPORATION OR ITS REPRESENTATIVES TO MAKE THIS FILING
ON HIS OR HER BEHALF.

        E.     GENERAL PROVISIONS

               1. ASSIGNMENT. The Corporation may assign the Repurchase Right to
any person or entity selected by the Board, including (without limitation) one
or more stockholders of the Corporation.

               2. NO EMPLOYMENT OR SERVICE CONTRACT. Nothing in this Agreement
or in the Plan shall confer upon Optionee any right to continue in Service for
any period of specific duration or interfere with or otherwise restrict in any
way the rights of the Corporation (or any Parent or Subsidiary employing or
retaining Optionee) or of Optionee, which rights are hereby expressly reserved
by each, to terminate Optionee's Service at any time for any reason, with or
without cause.

               3. NOTICES. Any notice required to be given under this Agreement
shall be in writing and shall be deemed effective upon personal delivery or upon
deposit in the U.S. mail, registered or certified, postage prepaid and properly
addressed to the party entitled to such notice at the address indicated below
such party's signature line on this Agreement or at such other address as such
party may designate by ten (10) days advance written notice under this paragraph
to all other parties to this Agreement.


                                       4.
<PAGE>   5



               4. NO WAIVER. The failure of the Corporation in any instance to
exercise the Repurchase Right shall not constitute a waiver of any other
repurchase rights that may subsequently arise under the provisions of this
Agreement or any other agreement between the Corporation and Optionee. No waiver
of any breach or condition of this Agreement shall be deemed to be a waiver of
any other or subsequent breach or condition, whether of like or different
nature.

               5. CANCELLATION OF SHARES. If the Corporation shall make
available, at the time and place and in the amount and form provided in this
Agreement, the consideration for the Purchased Shares to be repurchased in
accordance with the provisions of this Agreement, then from and after such time,
the person from whom such shares are to be repurchased shall no longer have any
rights as a holder of such shares (other than the right to receive payment of
such consideration in accordance with this Agreement). Such shares shall be
deemed purchased in accordance with the applicable provisions hereof, and the
Corporation shall be deemed the owner and holder of such shares, whether or not
the certificates therefor have been delivered as required by this Agreement.

        F.     MISCELLANEOUS PROVISIONS

               1. OPTIONEE UNDERTAKING. Optionee hereby agrees to take whatever
additional action and execute whatever additional documents the Corporation may
deem necessary or advisable in order to carry out or effect one or more of the
obligations or restrictions imposed on either Optionee or the Purchased Shares
pursuant to the provisions of this Agreement.

               2. AGREEMENT IS ENTIRE CONTRACT. This Agreement constitutes the
entire contract between the parties hereto with regard to the subject matter
hereof. This Agreement is made pursuant to the provisions of the Plan and shall
in all respects be construed in conformity with the terms of the Plan.

               3. GOVERNING LAW. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of California without resort
to that State's conflict-of-laws rules.

               4. COUNTERPARTS. This Agreement may be executed in counterparts,
each of which shall be deemed to be an original, but all of which together shall
constitute one and the same instrument.

               5. SUCCESSORS AND ASSIGNS. The provisions of this Agreement shall
inure to the benefit of, and be binding upon, the Corporation and its successors
and assigns and upon Optionee, Optionee's permitted assigns and the legal
representatives, heirs and legatees of Optionee's estate, whether or not any
such person shall have become a party to this Agreement and have agreed in
writing to join herein and be bound by the terms hereof.


                                       5.

<PAGE>   6




               IN WITNESS WHEREOF, the parties have executed this Agreement on
the day and year first indicated above.

                               ACT NETWORKS, INC.


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

                               Title:
                                     -------------------------------------------

                               Address:
                                       -----------------------------------------

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


                                       -----------------------------------------
                                                       OPTIONEE

                               Address:
                                       -----------------------------------------

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



                                             6.


<PAGE>   7



                             SPOUSAL ACKNOWLEDGMENT


               The undersigned spouse of Optionee has read and hereby approves
the foregoing Stock Purchase Agreement. In consideration of the Corporation's
granting Optionee the right to acquire the Purchased Shares in accordance with
the terms of such Agreement, the undersigned hereby agrees to be irrevocably
bound by all the terms of such Agreement, including (without limitation) the
right of the Corporation (or its assigns) to purchase any Purchased Shares in
which Optionee is not vested at time of his or her cessation of Service.


                                ------------------------------------------------
                                OPTIONEE'S SPOUSE

                                Address:
                                       -----------------------------------------

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



                                       7.

<PAGE>   8



                                    EXHIBIT I
                      ASSIGNMENT SEPARATE FROM CERTIFICATE

               FOR VALUE RECEIVED ___________________________hereby sell(s), 

assign(s) and transfer(s) unto ACT Networks, Inc. (the "Corporation"), 

_____________________________(_________) shares of the Common Stock of the

Corporation standing in his or her name on the books of the Corporation

represented by Certificate No. ___________________ herewith and do(es) hereby 

irrevocably constitute and appoint ___________________________Attorney to 

transfer the said stock on the books of the Corporation with full power of 

substitution in the premises.

Dated: _________________________


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







INSTRUCTION: Please do not fill in any blanks other than the signature line.
Please sign exactly as you would like your name to appear on the issued stock
certificate. The purpose of this assignment is to enable the Corporation to
exercise the Repurchase Right without requiring additional signatures on the
part of Optionee.


<PAGE>   9



                                   EXHIBIT II

                       FEDERAL INCOME TAX CONSEQUENCES AND
                           SECTION 83(b) TAX ELECTION

        I. FEDERAL INCOME TAX CONSEQUENCES AND SECTION 83(b) ELECTION FOR
EXERCISE OF NON-STATUTORY OPTION. If the Purchased Shares are acquired pursuant
to the exercise of a Non-Statutory Option, as specified in the Grant Notice,
then under Code Section 83, the excess of the Fair Market Value of the Purchased
Shares on the date any forfeiture restrictions applicable to such shares lapse
over the Exercise Price paid for such shares will be reportable as ordinary
income on the lapse date. For this purpose, the term "forfeiture restrictions"
includes the right of the Corporation to repurchase the Purchased Shares
pursuant to the Repurchase Right. However, Optionee may elect under Code Section
83(b) to be taxed at the time the Purchased Shares are acquired, rather than
when and as such Purchased Shares cease to be subject to such forfeiture
restrictions. Such election must be filed with the Internal Revenue Service
within thirty (30) days after the date of the Agreement. Even if the Fair Market
Value of the Purchased Shares on the date of the Agreement equals the Exercise
Price paid (and thus no tax is payable), the election must be made to avoid
adverse tax consequences in the future. The form for making this election is
attached as part of this exhibit. FAILURE TO MAKE THIS FILING WITHIN THE
APPLICABLE THIRTY (30)-DAY PERIOD WILL RESULT IN THE RECOGNITION OF ORDINARY
INCOME BY OPTIONEE AS THE FORFEITURE RESTRICTIONS LAPSE.

        II. FEDERAL INCOME TAX CONSEQUENCES AND CONDITIONAL SECTION 83(B)
ELECTION FOR EXERCISE OF INCENTIVE OPTION. If the Purchased Shares are acquired
pursuant to the exercise of an Incentive Option, as specified in the Grant
Notice, then the following tax principles shall be applicable to the Purchased
Shares:

                      (i) For regular tax purposes, no taxable income will be
        recognized at the time the Option is exercised.

                      (ii) The excess of (a) the Fair Market Value of the
        Purchased Shares on the date the Option is exercised or (if later) on
        the date any forfeiture restrictions applicable to the Purchased Shares
        lapse over (b) the Exercise Price paid for the Purchased Shares will be
        includible in Optionee's taxable income for alternative minimum tax
        purposes.

                      (iii) If Optionee makes a disqualifying disposition of the
        Purchased Shares, then Optionee will recognize ordinary income in the
        year of such disposition equal in amount to the excess of (a) the Fair
        Market Value of the Purchased Shares on the date the Option is exercised
        or (if later) on the date any forfeiture restrictions applicable to the
        Purchased Shares lapse over (b) the

                                      II-1.

<PAGE>   10



        Exercise Price paid for the Purchased Shares. Any additional gain
        recognized upon the disqualifying disposition will be either short-term
        or long-term capital gain depending upon the period for which the
        Purchased Shares are held prior to the disposition.

                      (iv) For purposes of the foregoing, the term "forfeiture
        restrictions" will include the right of the Corporation to repurchase
        the Purchased Shares pursuant to the Repurchase Right. The term
        "disqualifying disposition" means any sale or other disposition 1 of the
        Purchased Shares within two (2) years after the Grant Date or within one
        (1) year after the exercise date of the Option.

                      (v) In the absence of final Treasury Regulations relating
        to Incentive Options, it is not certain whether Optionee may, in
        connection with the exercise of the Option for any Purchased Shares at
        the time subject to forfeiture restrictions, file a protective election
        under Code Section 83(b) which would limit (a) Optionee's alternative
        minimum taxable income upon exercise and (b) Optionee's ordinary income
        upon a disqualifying disposition to the excess of the Fair Market Value
        of the Purchased Shares on the date the Option is exercised over the
        Exercise Price paid for the Purchased Shares. Accordingly, such election
        if properly filed will only be allowed to the extent the final Treasury
        Regulations permit such a protective election. Page 2 of the attached
        form for making the election should be filed with any election made in
        connection with the exercise of an Incentive Option.


- ---------- 
(1) Generally, a disposition of shares purchased under an Incentive Option
includes any transfer of legal title, including a transfer by sale, exchange or
gift, but does not include a transfer to the Optionee's spouse, a transfer into
joint ownership with right of survivorship if Optionee remains one of the joint
owners, a pledge, a transfer by bequest or inheritance or certain tax free
exchanges permitted under the Code.

                                      II-2.

<PAGE>   11



                                    SECTION 83(b) ELECTION

               This statement is being made under Section 83(b) of the Internal
Revenue Code, pursuant to Treas. Reg. Section 1.83-2.

(1)     The taxpayer who performed the services is:

        Name:
        Address:
        Taxpayer Ident. No.:

(2)     The property with respect to which the election is being made is
        __________ shares of the common stock of ACT Networks, Inc.

(3)     The property was issued on ________________, 199__.

(4)     The taxable year in which the election is being made is the calendar
        year 199__.

(5)     The property is subject to a repurchase right pursuant to which the
        issuer has the right to acquire the property at the original purchase
        price if for any reason taxpayer's service with the issuer terminates.
        The issuer's repurchase right will lapse in a series of annual and
        monthly installments over a fifty (50)-month period ending on
        __________________________, 200_.

(6)     The fair market value at the time of transfer (determined without regard
        to any restriction other than a restriction which by its terms will
        never lapse) is $ __________ per share.

(7)     The amount paid for such property is $ ________________ per share.

(8)     A copy of this statement was furnished to ACT Networks, Inc. for whom
        taxpayer rendered the services underlying the transfer of property.

(9)     This statement is executed on__________________________ , 199__.




- --------------------------------            ------------------------------------
Spouse (if any)                             Taxpayer


This election must be filed with the Internal Revenue Service Center with which
taxpayer files his or her Federal income tax returns and must be made within
thirty (30) days after the execution date of the Stock Purchase Agreement. This
filing should be made by registered or certified mail, return receipt requested.
Optionee must retain two (2) copies of the completed form for filing with his or
her Federal and state tax returns for the current tax year and an additional
copy for his or her records.




<PAGE>   12



               The property described in the above Section 83(b) election is
comprised of shares of common stock acquired pursuant to the exercise of an
incentive stock option under Section 422 of the Internal Revenue Code (the
"Code"). Accordingly, it is the intent of the Taxpayer to utilize this election
to achieve the following tax results:

               1. The purpose of this election is to have the alternative
minimum taxable income attributable to the purchased shares measured by the
amount by which the fair market value of such shares at the time of their
transfer to the Taxpayer exceeds the purchase price paid for the shares. In the
absence of this election, such alternative minimum taxable income would be
measured by the spread between the fair market value of the purchased shares and
the purchase price which exists on the various lapse dates in effect for the
forfeiture restrictions applicable to such shares. The election is to be
effective to the full extent permitted under the Code.

               2. Section 421(a)(1) of the Code expressly excludes from income
any excess of the fair market value of the purchased shares over the amount paid
for such shares. Accordingly, this election is also intended to be effective in
the event there is a "disqualifying disposition" of the shares, within the
meaning of Section 421(b) of the Code, which would otherwise render the
provisions of Section 83(a) of the Code applicable at that time. Consequently,
the Taxpayer hereby elects to have the amount of disqualifying disposition
income measured by the excess of the fair market value of the purchased shares
on the date of transfer to the Taxpayer over the amount paid for such shares.
Since Section 421(a) presently applies to the shares which are the subject of
this Section 83(b) election, no taxable income is actually recognized for
regular tax purposes at this time, and no income taxes are payable, by the
Taxpayer as a result of this election.


THIS PAGE 2 IS TO BE ATTACHED TO ANY SECTION 83(b) ELECTION FILED IN
CONNECTION WITH THE EXERCISE OF AN INCENTIVE STOCK OPTION UNDER
THE FEDERAL TAX LAWS.



                                       2.

<PAGE>   13



                                    APPENDIX


               The following definitions shall be in effect under the Agreement:

        A. AGREEMENT shall mean this Stock Purchase Agreement.

        B. BOARD shall mean the Corporation's Board of Directors.

        C. CODE shall mean the Internal Revenue Code of 1986, as amended.

        D. COMMON STOCK shall mean the Corporation's common stock.

        E. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

                    (i) a merger or consolidation in which securities possessing
        more than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction, or

                   (ii) the sale, transfer or other disposition of all or
        substantially all of the Corporation's assets in complete liquidation or
        dissolution of the Corporation.

        F. CORPORATION shall mean ACT Networks, Inc., a Delaware corporation.

        G. EXERCISE PRICE shall have the meaning assigned to such term in
Paragraph A.1.

        H. GRANT DATE shall have the meaning assigned to such term in Paragraph
A.1.

        I. GRANT NOTICE shall mean the Notice of Grant of Stock Option pursuant
to which Optionee has been informed of the basic terms of the Option.

        J. INCENTIVE OPTION shall mean an option which satisfies the
requirements of Code Section 422.

        K. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
requirements of Code Section 422.

        L. OPTION shall have the meaning assigned to such term in Paragraph A.1.


                                       A-1

<PAGE>   14



        M. OPTION AGREEMENT shall mean all agreements and other documents
evidencing the Option.

        N. OPTIONEE shall mean the person to whom the Option is granted under
the Plan.

        O. OWNER shall mean Optionee and all subsequent holders of the Purchased
Shares who derive their chain of ownership through a Permitted Transfer from
Optionee.

        P. PARENT shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.

        Q. PERMITTED TRANSFER shall mean (i) a gratuitous transfer of the
Purchased Shares, provided and only if Optionee obtains the Corporation's prior
written consent to such transfer, (ii) a transfer of title to the Purchased
Shares effected pursuant to Optionee's will or the laws of intestate succession
following Optionee's death or (iii) a transfer to the Corporation in pledge as
security for any purchase-money indebtedness incurred by Optionee in connection
with the acquisition of the Purchased Shares.

        R. PLAN shall mean the Corporation's 1997 Stock Incentive Plan.

        S. PLAN ADMINISTRATOR shall mean either the Board or a committee of the
Board acting in its capacity as administrator of the Plan.

        T. PRIOR PURCHASE AGREEMENT shall have the meaning assigned to such term
in Paragraph C.4.

        U. PURCHASED SHARES shall have the meaning assigned to such term in
Paragraph A.1.

        V. RECAPITALIZATION shall mean any stock split, stock dividend,
recapitalization, combination of shares, exchange of shares or other change
affecting the Corporation's outstanding Common Stock as a class without the
Corporation's receipt of consideration.

        W. REPURCHASE RIGHT shall mean the right granted to the Corporation in
accordance with Article C.

        X. SERVICE shall mean the Optionee's performance of services for the
Corporation (or any Parent or Subsidiary) in the capacity of an employee,
subject to the control and direction of the employer entity as to both the work
to be performed and the manner and method of performance, a non-employee member
of the board of directors or an independent consultant.


                                       A-2

<PAGE>   15


        Y. SUBSIDIARY shall mean any corporation (other than the Corporation) in
an unbroken chain of corporations beginning with the Corporation, provided each
corporation (other than the last corporation) in the unbroken chain owns, at the
time of the determination, stock possessing fifty percent (50%) or more of the
total combined voting power of all classes of stock in one of the other
corporations in such chain.

        Z. VESTING SCHEDULE shall mean the vesting schedule specified in the
Grant Notice pursuant to which the Optionee is to vest in the Option Shares in a
series of installments over his or her period of Service.

        AA. UNVESTED SHARES shall have the meaning assigned to such term in
Paragraph C.1.


                                       A-3

<PAGE>   1
                                                                    EXHIBIT 99.9

                                    ADDENDUM
                                       TO
                            STOCK PURCHASE AGREEMENT


               The following provisions are hereby incorporated into, and are
hereby made a part of, that certain Stock Purchase Agreement dated ____________
(the "Purchase Agreement") by and between ACT Networks, Inc. (the "Corporation")
and _________________ ("Optionee") evidencing the purchase on such date by
Optionee stock option (the "Option") granted on ____________________ , 199__ to
Optionee under the terms of the Corporation's 1997 Stock Incentive Plan, and
such provisions shall be effective immediately. All capitalized terms in this
Addendum, to the extent not otherwise defined herein, shall have the meanings
assigned to them in the Purchase Agreement.

                        INVOLUNTARY TERMINATION FOLLOWING
                     CORPORATE TRANSACTION/CHANGE IN CONTROL

               1. To the extent the Repurchase Right is assigned to the
successor corporation (or parent thereof) in connection with a Corporate
Transaction, no accelerated vesting of the Purchased Shares shall occur upon
such Corporate Transaction, and the Repurchase Right shall continue to remain in
full force and effect in accordance with the provisions of the Purchase
Agreement. The Optionee shall, over Optionee's period of Service following the
Corporate Transaction, continue to vest in the Purchased Shares in one or more
installments in accordance with the provisions of the Purchase Agreement.

               2. No accelerated vesting of the Purchased Shares shall occur
upon a Change in Control, and the Repurchase Right shall continue to remain in
full force and effect in accordance with the provisions of the Purchase
Agreement. The Optionee shall, over Optionee's period of Service following the
Change in Control, continue to vest in the Purchased Shares in one or more
installments in accordance with the provisions of the Purchase Agreement.

               3. Immediately upon an Involuntary Termination of Optionee's
Service within eighteen (18) months following a Corporate Transaction in which
the Repurchase Right is assigned or any Change in Control, the Repurchase Right
shall terminate automatically and all the Purchased Shares shall vest in full at
that time.

               4. For purposes of this Addendum, the following definitions shall
be in effect:

                  An INVOLUNTARY TERMINATION shall mean the termination of 
Optionee's Service by reason of:

                           (i) Optionee's involuntary dismissal or discharge by
        the Corporation for reasons other than Misconduct, or



<PAGE>   2





                           (ii) Optionee's voluntary resignation following (A) a
        change in Optionee's position with the Corporation (or Parent or
        Subsidiary employing Optionee) which materially reduces Optionee's
        duties or responsibilities, (B) a reduction in Optionee's level of
        compensation (including base salary, fringe benefits and target bonus
        under any corporate performance based bonus or incentive programs) by
        more than fifteen percent (15%) or (C) a relocation of Optionee's place
        of employment by more than fifty (50) miles, provided and only if such
        change, reduction or relocation is effected by the Corporation without
        Optionee's consent.

                      A CHANGE IN CONTROL shall be deemed to occur in the event
of a change in ownership or control of the Corporation effected through either 
of the following transactions:

                           (i) the acquisition, directly or indirectly, by any
        person or related group of persons (other than the Corporation or a
        person that directly or indirectly controls, is controlled by, or is
        under common control with, the Corporation) of beneficial ownership
        (within the meaning of Rule 13d-3 of the 1934 Act) of securities
        possessing more than fifty percent (50%) of the total combined voting
        power of the Corporation's outstanding securities pursuant to a tender
        or exchange offer made directly to the Corporation's stockholders, or

                          (ii) a change in the composition of the Board over a
        period of thirty-six (36) consecutive months or less such that a
        majority of the Board members ceases, by reason of one or more contested
        elections for Board membership, to be comprised of individuals who
        either (A) have been Board members continuously since the beginning of
        such period or (B) have been elected or nominated for election as Board
        members during such period by at least a majority of the Board members
        described in clause (A) who were still in office at the time the Board
        approved such election or nomination.

               MISCONDUCT shall mean the commission of any act of fraud,
embezzlement or dishonesty by the Optionee, any unauthorized use or disclosure
by the Optionee of confidential information or trade secrets of the Corporation
(or any Parent or Subsidiary), or any other intentional misconduct by the
Optionee adversely affecting the business or affairs of the Corporation (or any
Parent or Subsidiary) in a material manner. The foregoing definition shall not
be deemed to be inclusive of all the acts or omissions which the Corporation (or
any Parent or Subsidiary) may consider as grounds for the dismissal or discharge
of the Optionee or other person in the Service of the Corporation (or any Parent
or Subsidiary).



                                       2.

<PAGE>   3



               IN WITNESS WHEREOF, ACT Networks, Inc. has caused this Addendum
to be executed by its duly-authorized officer as of the Effective Date specified
below.


                                            ACT NETWORKS, INC.


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

                                            Title:
                                                  ------------------------------




EFFECTIVE DATE:_____________________ , 199 __


                                       3.



<PAGE>   1
                                                                   EXHIBIT 99.10

                                                                   INITIAL GRANT

                               ACT NETWORKS, INC.
                    NOTICE OF GRANT OF NON-EMPLOYEE DIRECTOR
                             AUTOMATIC STOCK OPTION

               Notice is hereby given of the following option grant (the
"Option") to purchase shares of the Common Stock of ACT Networks, Inc. (the
"Corporation"):

               Optionee: ______________________________________________________

               Grant Date:_____________________________________________________

               Exercise Price:  $ ___________________ per share

               Number of Option Shares: 21,000 shares

               Expiration Date:________________________________________________

               Type of Option:    Non-Statutory Stock Option

               Date Exercisable:  Immediately Exercisable

               Vesting Schedule: The Option Shares shall initially be unvested
               and subject to repurchase by the Corporation at the Exercise
               Price paid per share. Optionee shall acquire a vested interest
               in, and the Corporation's repurchase right shall accordingly
               lapse with respect to, the Option Shares in thirty-six (36)
               successive equal monthly installments upon Optionee's completion
               of each month of service as a member of the Corporation's Board
               of Directors (the "Board") over the thirty six (36)-month period
               measured from the Grant Date. In no event shall any additional
               Option Shares vest after Optionee's cessation of Board service.

               Optionee understands and agrees that the Option is granted
subject to and in accordance with the terms of the automatic option grant
program under the ACT Networks, Inc. 1997 Stock Incentive Plan (the "Plan").
Optionee further agrees to be bound by the terms of the Plan and the terms of
the Option as set forth in the Automatic Stock Option Agreement attached hereto
as Exhibit A. Optionee hereby acknowledges receipt of a copy of the official
prospectus for the Plan in the form attached hereto as Exhibit B. A copy of the
Plan is available upon request made to the Corporate Secretary at the
Corporation's principal offices.



<PAGE>   2




               REPURCHASE RIGHT. OPTIONEE HEREBY AGREES THAT ALL UNVESTED OPTION
SHARES ACQUIRED UPON THE EXERCISE OF THE OPTION SHALL BE SUBJECT TO A REPURCHASE
RIGHT EXERCISABLE BY THE CORPORATION AND ITS ASSIGNS. THE TERMS OF SUCH RIGHT
SHALL BE SPECIFIED IN A STOCK PURCHASE AGREEMENT, IN FORM AND SUBSTANCE
SATISFACTORY TO THE CORPORATION, EXECUTED BY OPTIONEE AT THE TIME OF THE OPTION
EXERCISE.

               No Impairment of Rights. Nothing in this Notice or the attached
Automatic Stock Option Agreement or in the Plan shall interfere with or
otherwise restrict in any way the rights of the Corporation and the
Corporation's stockholders to remove Optionee from the Board at any time in
accordance with the provisions of applicable law.

               Definitions. All capitalized terms in this Notice shall have the
meaning assigned to them in this Notice or in the attached Automatic Stock
Option Agreement.

_______________________ , 199__
        Date


                                                   ACT NETWORKS, INC.


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

                                                   Title:
                                                         -----------------------



                                                   -----------------------------
                                                   OPTIONEE

                                                   Address:_____________________

                                                   _____________________________

ATTACHMENTS
EXHIBIT A - AUTOMATIC STOCK OPTION AGREEMENT
EXHIBIT B - PLAN SUMMARY AND PROSPECTUS

                                       2.

<PAGE>   3



                                    EXHIBIT A

                        AUTOMATIC STOCK OPTION AGREEMENT




<PAGE>   4


                                    EXHIBIT B

                           PLAN SUMMARY AND PROSPECTUS





<PAGE>   1
                                                                   EXHIBIT 99.11

                                                                    ANNUAL GRANT


                               ACT NETWORKS, INC.
                    NOTICE OF GRANT OF NON-EMPLOYEE DIRECTOR
                             AUTOMATIC STOCK OPTION

               Notice is hereby given of the following option grant (the
"Option") to purchase shares of the Common Stock of ACT Networks, Inc. (the
"Corporation"):

               Optionee: ______________________________________________________

               Grant Date:_____________________________________________________

               Exercise Price:  $ ___________________ per share

               Number of Option Shares: 7,000 shares

               Expiration Date:________________________________________________

               Type of Option:   Non-Statutory Stock Option

               Date Exercisable: Immediately Exercisable

               Vesting Schedule: The Option Shares shall initially be unvested
               and subject to repurchase by the Corporation at the Exercise
               Price paid per share. Optionee shall acquire a vested interest
               in, and the Corporation's repurchase right shall accordingly
               lapse with respect to, all the Option Shares on the day
               immediately preceding the date of the next Annual Stockholders
               Meeting following the Grant Date, provided Optionee continues to
               serve as a member of the Corporation's Board of Directors (the
               "Board") through such day. In no event shall any additional
               Option Shares vest after Optionee's cessation of Board service.

               Optionee understands and agrees that the Option is granted
subject to and in accordance with the terms of the automatic option grant
program under the ACT Networks, Inc. 1997 Stock Incentive Plan (the "Plan").
Optionee further agrees to be bound by the terms of the Plan and the terms of
the Option as set forth in the Automatic Stock Option Agreement attached hereto
as Exhibit A.

               Optionee hereby acknowledges receipt of a copy of the official
prospectus for the Plan in the form attached hereto as Exhibit B. A copy of the
Plan is available upon request made to the Corporate Secretary at the
Corporation's principal offices.



<PAGE>   2



               REPURCHASE RIGHT. OPTIONEE HEREBY AGREES THAT ALL UNVESTED OPTION
SHARES ACQUIRED UPON THE EXERCISE OF THE OPTION SHALL BE SUBJECT TO A REPURCHASE
RIGHT EXERCISABLE BY THE CORPORATION AND ITS ASSIGNS. THE TERMS OF SUCH RIGHT
SHALL BE SPECIFIED IN A STOCK PURCHASE AGREEMENT, IN FORM AND SUBSTANCE
SATISFACTORY TO THE CORPORATION, EXECUTED BY OPTIONEE AT THE TIME OF THE OPTION
EXERCISE.

               No Impairment of Rights. Nothing in this Notice or the attached
Automatic Stock Option Agreement or in the Plan shall interfere with or
otherwise restrict in any way the rights of the Corporation and the
Corporation's stockholders to remove Optionee from the Board at any time in
accordance with the provisions of applicable law.

               Definitions. All capitalized terms in this Notice shall have the
meaning assigned to them in this Notice or in the attached Automatic Stock
Option Agreement.

_______________________ , 199__
        Date


                                                   ACT NETWORKS, INC.


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

                                                   Title:
                                                         -----------------------



                                                   -----------------------------
                                                   OPTIONEE

                                                   Address:_____________________

                                                   _____________________________





ATTACHMENTS
EXHIBIT A - AUTOMATIC STOCK OPTION AGREEMENT
EXHIBIT B - PLAN SUMMARY AND PROSPECTUS

                                       2.

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                                    EXHIBIT A

                        AUTOMATIC STOCK OPTION AGREEMENT




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                                    EXHIBIT B

                           PLAN SUMMARY AND PROSPECTUS





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                                                                   EXHIBIT 99.12

                               ACT NETWORKS, INC.
                        AUTOMATIC STOCK OPTION AGREEMENT




RECITALS

        A. The Corporation has implemented an automatic option grant program
under the Plan pursuant to which eligible non-employee members of the Board will
automatically receive special option grants at periodic intervals over their
period of Board service in order to provide such individuals with a meaningful
incentive to continue to serve as members of the Board.

        B. Optionee is an eligible non-employee Board member, and this Agreement
is executed pursuant to, and is intended to carry out the purposes of, the Plan
in connection with the automatic grant of an option to purchase shares of Common
Stock under the Plan.

        C. All capitalized terms in this Agreement shall have the meaning
assigned to them in the attached Appendix.

               NOW, THEREFORE, it is hereby agreed as follows:

               1. GRANT OF OPTION. The Corporation hereby grants to Optionee, as
of the Grant Date, a Non-Statutory Option to purchase up to the number of Option
Shares specified in the Grant Notice. The Option Shares shall be purchasable
from time to time during the option term specified in Paragraph 2 at the
Exercise Price.

               2. OPTION TERM. This option shall have a term of ten (10) years
measured from the Grant Date and shall accordingly expire at the close of
business on the Expiration Date, unless sooner terminated in accordance with
Paragraph 5, 6 or 7.

               3. LIMITED TRANSFERABILITY. This option, together with the
special stock appreciation right provided under Paragraph 7(b), shall be neither
transferable nor assignable by Optionee other than by will or by the laws of
descent and distribution following Optionee's death and may be exercised, during
Optionee's lifetime, only by Optionee. However, this option may, in connection
with the Optionee's estate plan, be assigned in whole or in part during the
Optionee's lifetime to one or more members of the Optionee's immediate family or
to a trust established exclusively for one or more such family members. The
assigned portion may only be exercised by the person or persons who acquire a
proprietary interest in the option pursuant to the assignment. The terms
applicable to the assigned portion shall be the same as those in effect for the
option immediately prior to such assignment and shall be set forth in such
documents issued to the assignee as the Corporation may deem appropriate.



<PAGE>   2




               4.     EXERCISABILITY/VESTING.

                      (a) This option shall be immediately exercisable for any
or all of the Option Shares, whether or not the Option Shares are at the time
vested in accordance with the Vesting Schedule, and shall remain so exercisable
until the Expiration Date or sooner termination of the option term under
Paragraph 5, 6 or 7.

                      (b) Optionee shall, in accordance with the Vesting
Schedule, vest in the Option Shares in one or more installments over his or her
period of Board service. Vesting in the Option Shares may be accelerated
pursuant to the provisions of Paragraph 5, 6 or 7. In no event, however, shall
any additional Option Shares vest following Optionee's cessation of service as a
Board member.

               5.    CESSATION OF BOARD SERVICE. Should Optionee's service as a
Board member cease while this option remains outstanding, then the option term
specified in Paragraph 2 shall terminate (and this option shall cease to be
outstanding) prior to the Expiration Date in accordance with the following
provisions:

                      (a) Should Optionee cease to serve as a Board member for
any reason (other than death or Permanent Disability) while this option is
outstanding, then the period for exercising this option shall be reduced to a
twelve (12)-month period (commencing with the date of such cessation of Board
service), but in no event shall this option be exercisable at any time after the
Expiration Date. During such limited period of exercisability, this option may
not be exercised in the aggregate for more than the number of Option Shares (if
any) in which Optionee is vested on the date Optionee ceases service as a Board
member. Upon the earlier of (i) the expiration of such twelve (12)-month period
or (ii) the specified Expiration Date, the option shall terminate and cease to
be exercisable with respect to any vested Option Shares for which the option has
not been exercised.

                      (b) Should Optionee die during the twelve (12)-month
period following his or her cessation of Board service and hold this option at
the time of his or her death, then the personal representative of Optionee's
estate or the person or persons to whom the option is transferred pursuant to
Optionee's will or in accordance with the laws of descent and distribution shall
have the right to exercise this option for any or all of the Option Shares in
which Optionee is vested at the time of Optionee's cessation of Board service
(less any Option Shares purchased by Optionee after such cessation of Board
service but prior to death). Such right of exercise shall terminate, and this
option shall accordingly cease to be exercisable for such vested Option Shares,
upon the earlier of (i) the expiration of the twelve (12)-month period measured
from the date of Optionee's cessation of Board service or (ii) the specified
Expiration Date.

                      (c) Should Optionee cease service as a Board member by
reason of death or Permanent Disability, then all Option Shares at the time
subject to this option but not otherwise vested shall vest in full so that this
option may be exercised for any or all of the Option Shares as fully-vested
shares of Common Stock at any time prior to the earlier of (i) the

                                       2.

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expiration of the twelve (12)-month period measured from the date of Optionee's
cessation of Board service or (ii) the specified Expiration Date, whereupon this
option shall terminate and cease to be outstanding.

                      (d) Upon Optionee's cessation of Board service for any
reason other than death or Permanent Disability, this option shall immediately
terminate and cease to be outstanding with respect to any and all Option Shares
in which Optionee is not otherwise at that time vested in accordance with the
normal Vesting Schedule or the special vesting acceleration provisions of
Paragraph 6 or 7 below.

               6.     CORPORATE TRANSACTION.

                      (a) In the event of a Corporate Transaction, all Option
Shares at the time subject to this option but not otherwise vested shall
automatically vest so that this option shall, immediately prior to the effective
date of such Corporate Transaction, become exercisable for all of the Option
Shares as fully-vested shares of Common Stock and may be exercised for any or
all of those vested Option Shares. Immediately following the Corporate
Transaction, this option shall terminate and cease to be exercisable except to
the extent assumed by the successor corporation (or parent thereof) in
connection with such Corporate Transaction.

                      (b) If this option is assumed in connection with a
Corporate Transaction, then this option shall be appropriately adjusted,
immediately after such Corporate Transaction, to apply to the number and class
of securities which would have been issuable to Optionee in consummation of such
Corporate Transaction had the option been exercised immediately prior to such
Corporate Transaction, and appropriate adjustments shall also be made to the
Exercise Price, provided the aggregate Exercise Price shall remain the same.

                      (c) This Agreement shall not in any way affect the right
of the Corporation to adjust, reclassify, reorganize or otherwise change its
capital or business structure or to merge, consolidate, dissolve, liquidate or
sell or transfer all or any part of its business or assets.

               7.     CHANGE IN CONTROL/HOSTILE TAKE-OVER.

                      (a) All Option Shares subject to this option at the time
of a Change in Control but not otherwise vested shall automatically vest so that
this option shall, immediately prior to the effective date of such Change in
Control, become exercisable for all of the Option Shares as fully-vested shares
of Common Stock and may be exercised for all or any portion of those vested
Option Shares . This option shall remain exercisable for such fully-vested
Option Shares until the earliest to occur of (i) the Expiration Date, (ii) the
sooner termination of this option in accordance with Paragraph 5 or 6 or (iii)
the surrender of the option in connection with a Hostile Take-Over.


                                       3.

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                      (b) Optionee shall have the unconditional right,
exercisable at any time during the thirty (30)-day period immediately following
the consummation of a Hostile TakeOver, to surrender this option to the
Corporation in exchange for a cash distribution from the Corporation in an
amount equal to the excess of (i) the Take-Over Price of the Option Shares at
the time subject to the surrendered option (whether or not those Option Shares
are otherwise at the time vested) over (ii) the aggregate Exercise Price payable
for such shares. This Paragraph 7(b) limited stock appreciation right shall in
all events terminate upon the expiration or sooner termination of the option
term and may not be assigned or transferred by Optionee.

                      (c) To exercise the Paragraph 7(b) limited stock
appreciation right, Optionee must, during the applicable thirty (30)-day
exercise period, provide the Corporation with written notice of the option
surrender in which there is specified the number of Option Shares as to which
the Option is being surrendered. Such notice must be accompanied by the return
of Optionee's copy of this Agreement, together with any written amendments to
such Agreement. The cash distribution shall be paid to Optionee within five (5)
days following such delivery date. The exercise of such limited stock
appreciation right in accordance with the terms of this Paragraph 7 has been
pre-approved pursuant to the express provisions of the automatic option grant
program in effect under the Plan, and no approval of the Plan Administrator or
the Board shall be required at the time of the actual option surrender and cash
distribution. Upon receipt of the cash distribution, this option shall be
cancelled with respect to the Option Shares subject to the surrendered option
(or the surrendered portion), and Optionee shall cease to have any further right
to acquire those Option Shares under this Agreement. The option shall, however,
remain outstanding for the balance of the Option Shares (if any) in accordance
with the terms of this Agreement, and the Corporation shall issue a replacement
stock option agreement (substantially in the same form as this Agreement) for
those remaining Option Shares.

               8. ADJUSTMENT IN OPTION SHARES. Should any change be made to the
Common Stock by reason of any stock split, stock dividend, recapitalization,
combination of shares, exchange of shares or other change affecting the
outstanding Common Stock as a class without the Corporation's receipt of
consideration, appropriate adjustments shall be made to (i) the total number
and/or class of securities subject to this option and (ii) the Exercise Price in
order to reflect such change and thereby preclude a dilution or enlargement of
benefits hereunder.

               9. STOCKHOLDER RIGHTS. The holder of this option shall not have
any stockholder rights with respect to the Option Shares until such person shall
have exercised the option, paid the Exercise Price and become a holder of record
of the purchased shares.

               10.   MANNER OF EXERCISING OPTION.

                      (a) In order to exercise this option with respect to all
or any part of the Option Shares for which this option is at the time
exercisable, Optionee (or any other person or persons exercising the option)
must take the following actions:



                                       4.

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                                (i) To the extent the option is exercised for
     vested Option Shares, execute and deliver to the Corporation a Notice of
     Exercise for the Option Shares for which the option is exercised. To the
     extent this option is exercised for unvested Option Shares, execute and
     deliver to the Corporation a Purchase Agreement.

                                (ii) Pay the aggregate Exercise Price for the
     purchased shares in one or more of the following forms:

                                    (A) cash or check made payable to the
        Corporation,

                                    (B) shares of Common Stock held by Optionee
        (or any other person or persons exercising the option) for the requisite
        period necessary to avoid a charge to the Corporation's earnings for
        financial reporting purposes and valued at Fair Market Value on the
        Exercise Date, or

                                    (C) to the extent the option is exercised
        for vested Option Shares, through a special sale and remittance
        procedure pursuant to which Optionee (or any other person or persons
        exercising the option) shall concurrently provide irrevocable
        instructions (I) to a Corporation-designated brokerage firm to effect
        the immediate sale of the purchased shares and remit to the Corporation,
        out of the sale proceeds available on the settlement date, sufficient
        funds to cover the aggregate Exercise Price payable for the purchased
        shares plus all applicable Federal, state and local income and
        employment taxes required to be withheld by the Corporation by reason of
        such exercise and (II) to the Corporation to deliver the certificates
        for the purchased shares directly to such brokerage firm in order to
        complete the sale.

                       Except to the extent the sale and remittance procedure is
        utilized in connection with the option exercise, payment of the
        Exercise Price must accompany the Notice of Exercise (or the Purchase
        Agreement) delivered to the Corporation in connection with the
        option exercise.

                                (iii) Furnish to the Corporation appropriate
     documentation that the person or persons exercising the option (if other
     than Optionee) have the right to exercise this option.

                      (b) As soon after the Exercise Date as practical, the
Corporation shall issue to or on behalf of Optionee (or any other person or
persons exercising this option) a certificate for the purchased Option Shares,
with the appropriate legends affixed thereto. To the

                                       5.

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extent any such Option Shares are unvested, the certificates for those Option
Shares shall be endorsed with an appropriate legend evidencing the Corporation's
repurchase rights and may be held in escrow with the Corporation until such
shares vest.

                      (c) In no event may this option be exercised for any
fractional shares.

               11. COMPLIANCE WITH LAWS AND REGULATIONS.

                      (a) The exercise of this option and the issuance of the
Option Shares upon such exercise shall be subject to compliance by the
Corporation and Optionee with all applicable requirements of law relating
thereto and with all applicable regulations of any stock exchange (or the Nasdaq
National Market, if applicable) on which the Common Stock may be listed for
trading at the time of such exercise and issuance.

                      (b) The inability of the Corporation to obtain approval
from any regulatory body having authority deemed by the Corporation to be
necessary to the lawful issuance and sale of any Common Stock pursuant to this
option shall relieve the Corporation of any liability with respect to the
non-issuance or sale of the Common Stock as to which such approval shall not
have been obtained. The Corporation, however, shall use its best efforts to
obtain all such approvals.

               12. SUCCESSORS AND ASSIGNS. Except to the extent otherwise
provided in Paragraph 3 or 6, the provisions of this Agreement shall inure to
the benefit of, and be binding upon, the Corporation and its successors and
assigns and Optionee, Optionee's assigns and the legal representatives, heirs
and legatees of Optionee's estate.

               13. NOTICES. Any notice required to be given or delivered to the
Corporation under the terms of this Agreement shall be in writing and addressed
to the Corporation at its principal corporate offices. Any notice required to be
given or delivered to Optionee shall be in writing and addressed to Optionee at
the address indicated below Optionee's signature line on the Grant Notice. All
notices shall be deemed effective upon personal delivery or upon deposit in the
U.S. mail, postage prepaid and properly addressed to the party to be notified.

               14. CONSTRUCTION. This Agreement and the option evidenced hereby
are made and granted pursuant to the Plan and are in all respects limited by and
subject to the terms of the Plan.

               15. GOVERNING LAW. The interpretation, performance and
enforcement of this Agreement shall be governed by the laws of the State of
California without resort to that State's conflict-of-laws rules.


                                       6.

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                                    EXHIBIT I

                               NOTICE OF EXERCISE


               I hereby notify ACT Networks, Inc. (the "Corporation") that I
elect to purchase ___________ shares of the Corporation's Common Stock (the
"Purchased Shares") at the option exercise price of $ _______ per share (the
"Exercise Price") pursuant to that certain option (the "Option") granted to me
under the Corporation's 1997 Stock Incentive Plan on ___________________ , 199 .

               Concurrently with the delivery of this Exercise Notice to the
Corporation, I shall hereby pay to the Corporation the Exercise Price for the
Purchased Shares in accordance with the provisions of my agreement with the
Corporation (or other documents) evidencing the Option and shall deliver
whatever additional documents may be required by such agreement as a condition
for exercise. Alternatively, I may utilize the special broker-dealer sale and
remittance procedure specified in my agreement to effect payment of the Exercise
Price for any Purchased Shares in which I am vested at the time of exercise of
the Option.


__________________________  , 199 __
Date


                                    ____________________________________________
                                    Optionee

                                    Address:____________________________________

                                    ____________________________________________
Print name in exact manner
it is to appear on the
stock certificate:                  ____________________________________________

Address to which certificate
is to be sent, if different
from address above:                 ____________________________________________

                                    ____________________________________________

Social Security Number:             ____________________________________________



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                                    APPENDIX


        The following definitions shall be in effect under the Agreement:

        A. AGREEMENT shall mean this Automatic Stock Option Agreement.

        B. BOARD shall mean the Corporation's Board of Directors.

        C. CHANGE IN CONTROL shall mean a change in ownership or control of the
Corporation effected through either of the following transactions:

             (i) the acquisition, directly or indirectly, by any person or
        related group of persons (other than the Corporation or a person that
        directly or indirectly controls, is controlled by, or is under common
        control with, the Corporation) of beneficial ownership (within the
        meaning of Rule 13d-3 of the 1934 Act) of securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities pursuant to a tender or exchange
        offer made directly to the Corporation's stockholders, or

            (ii) a change in the composition of the Board over a period of
        thirty-six (36) consecutive months or less such that a majority of the
        Board members ceases, by reason of one or more contested elections for
        Board membership, to be comprised of individuals who either (A) have
        been Board members continuously since the beginning of such period or
        (B) have been elected or nominated for election as Board members during
        such period by at least a majority of the Board members described in
        clause (A) who were still in office at the time the Board approved such
        election or nomination.

        D. CODE shall mean the Internal Revenue Code of 1986, as amended.

        E. COMMON STOCK shall mean the Corporation's common stock.

        F. CORPORATE TRANSACTION shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

             (i) a merger or consolidation in which securities possessing more
        than fifty percent (50%) of the total combined voting power of the
        Corporation's outstanding securities are transferred to a person or
        persons different from the persons holding those securities immediately
        prior to such transaction, or

            (ii) the sale, transfer or other disposition of all or substantially
        all of the Corporation's assets in complete liquidation or dissolution
        of the Corporation.


                                      A-1.

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        G. CORPORATION shall mean ACT Networks, Inc., a Delaware corporation.

        H. EXERCISE DATE shall mean the date on which the option shall have been
exercised in accordance with Paragraph 10 of the Agreement.

        I. EXERCISE PRICE shall mean the exercise price per share as specified
in the Grant Notice.

        J. EXPIRATION DATE shall mean the date on which the option expires as
specified in the Grant Notice.

        K. FAIR MARKET VALUE per share of Common Stock on any relevant date
shall be determined in accordance with the following provisions:

             (i) If the Common Stock is at the time traded on the Nasdaq
        National Market, then the Fair Market Value shall be the closing selling
        price per share of Common Stock on the date in question, as the price is
        reported by the National Association of Securities Dealers on the Nasdaq
        National Market. If there is no closing selling price for the Common
        Stock on the date in question, then the Fair Market Value shall be the
        closing selling price on the last preceding date for which such
        quotation exists.

            (ii) If the Common Stock is at the time listed on any Stock
        Exchange, then the Fair Market Value shall be the closing selling price
        per share of Common Stock on the date in question on the Stock Exchange
        which serves as the primary market for the Common Stock, as such price
        is officially quoted in the composite tape of transactions on such
        exchange. If there is no closing selling price for the Common Stock on
        the date in question, then the Fair Market Value shall be the closing
        selling price on the last preceding date for which such quotation
        exists.

        L. GRANT DATE shall mean the date of grant of the option as specified in
the Grant Notice.

        M. GRANT NOTICE shall mean the Notice of Grant of Automatic Stock Option
accompanying the Agreement, pursuant to which Optionee has been informed of the
basic terms of the option evidenced hereby.

        N. HOSTILE TAKE-OVER shall mean the acquisition, directly or indirectly,
by any person or related group of persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) of beneficial ownership (within the
meaning of Rule 13d-3 of the 1934 Act) of securities possessing more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities pursuant to a tender or exchange offer made directly to
the Corporation's stockholders which the Board does not recommend such
stockholders to accept.

                                      A-2.

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

        P. NON-STATUTORY OPTION shall mean an option not intended to satisfy the
requirements of Code Section 422.

        Q. NOTICE OF EXERCISE shall mean the notice of exercise in the form of
Exhibit I.

        R. OPTION SHARES shall mean the number of shares of Common Stock subject
to the option.

        S. OPTIONEE shall mean the person to whom the option is granted as
specified in the Grant Notice.

        T. PERMANENT DISABILITY shall mean the inability of Optionee to perform
his or her usual duties as a member of the Board by reason of any medically
determinable physical or mental impairment which is expected to result in death
or has lasted or can be expected to last for a continuous period of twelve (12)
months or more.

        U. PLAN shall mean the Corporation's 1997 Stock Incentive Plan.

        V. PURCHASE AGREEMENT shall mean the stock purchase agreement (in form
and substance satisfactory to the Corporation) which grants the Corporation the
right to repurchase, at the Exercise Price, any and all unvested Option Shares
held by Optionee at the time of Optionee's cessation of Board service and which
precludes the sale, transfer or other disposition of any purchased Option Shares
while subject to such repurchase right.

        W. STOCK EXCHANGE shall mean the American Stock Exchange or the New York
Stock Exchange.

        X. TAKE-OVER PRICE shall mean the greater of (i) the Fair Market Value
per share of Common Stock on the date the option is surrendered to the
Corporation in connection with a Hostile Take-Over or (ii) the highest reported
price per share of Common Stock paid by the tender offeror in effecting the
Hostile Take-Over.

        Y. VESTING SCHEDULE shall mean the vesting schedule specified in the
Grant Notice pursuant to which the Optionee is to vest in the Option Shares in
one or more installments over his or her period of Board service, subject to the
special vesting acceleration provisions of the Agreement.

                                      A-3.


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