ACT NETWORKS INC
S-8, 1999-08-25
COMPUTER COMMUNICATIONS EQUIPMENT
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<PAGE>   1

     As filed with the Securities and Exchange Commission on August 25, 1999

                                                   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                                               77-0152144
- ---------------------------------                            -------------------
  (State or other jurisdiction                                 (IRS Employer
of incorporation or organization)                            Identification No.)


                             26707 WEST AGOURA ROAD
                           CALABASAS, CALIFORNIA 91302
                                 (818) 871-6400
- --------------------------------------------------------------------------------
               (Address of principal executive offices) (Zip Code)

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

                            1997 STOCK INCENTIVE PLAN
           1997 NON-EXECUTIVE OFFICER STOCK OPTION/STOCK ISSUANCE PLAN
                           OPTION GRANTED TO MR. URIBE
- --------------------------------------------------------------------------------
                            (Full title of the Plans)

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

                                 SUSAN N. CAYLEY
                               V.P., LEGAL AFFAIRS
                               ACT NETWORKS, INC.
                             26707 WEST AGOURA ROAD
                           CALABASAS, CALIFORNIA 91302
                                 (818) 871-6400
- --------------------------------------------------------------------------------
                     (Name and address of agent for service)


                         CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
===============================================================================================================================
                                                                          Offering
                                                      Amount to be          Price           Aggregate             Amount of
Title of Securities to be Registered                  Registered(1)       per share       Offering Price       Registration Fee
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>                 <C>             <C>                  <C>
1997 Stock Incentive Plan                            200,000 shares         $10.56         $2,112,000.00          $  587.14(2)
Common Stock, $0.001 par value
- -------------------------------------------------------------------------------------------------------------------------------
1997 Non-Executive Officer Stock                     250,000 shares         $10.56         $2,640,000.00          $  733.92(2)
Option/Stock Issuance Plan
Common Stock, $0.001 par value
- -------------------------------------------------------------------------------------------------------------------------------
Option Granted to Mr. Uribe                          150,000 shares         $11.1250       $1,668,750.00          $  463.91(3)
Common Stock, $0.001 par value
- -------------------------------------------------------------------------------------------------------------------------------
Aggregate Registration Fee                                                                                        $1,784.97
===============================================================================================================================
</TABLE>

(1)   This Registration Statement shall also cover any additional shares of
      Common Stock which become issuable under the 1997 Stock Incentive Plan,
      1997 Non-Executive Officer Stock Option/Stock Issuance Plan and Option
      granted to Mr. Uribe by reason of any stock dividend, stock split,
      recapitalization or other similar transaction effected without the
      Registrant's receipt of consideration which results in an increase in the
      number of the 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 Registrant's Common Stock on
      August 20, 1999, as reported by the Nasdaq National Market.

(3)   Calculated solely for purposes of this offering under Rule 457(h) of the
      Securities Act of 1933, as amended, on the basis of the exercise price of
      the option granted to the listed individual.

================================================================================
<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 "Commission"):


        (a) The Registrant's Annual Report on Forms 10-K and 10-K/A for the
            fiscal year ended June 30, 1998, filed with the Commission on
            September 28, 1998 and October 14, 1998, respectively;

        (b) The Registrant's Quarterly Reports on Form 10-Q for the fiscal
            quarters ended September 30, 1998, December 31, 1998 and March 31,
            1999 filed with the Commission on November 16, 1998;, February 12,
            1999 and May 17, 1999, respectively; and


        (c) The Registrant's Registration Statement No. 000-25740 on Forms 8-A
            and 8-A/A, filed with the Commission on March 23, 1995 and April 25,
            1995, respectively, 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 and Exchange Act
of 1934, as amended (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.


                                      II-1

<PAGE>   3

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 to the extent any 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, with reasonable cause to believe such conduct was lawful. 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 or other
actions, against an undertaking by the director or officer to repay such
advances if it is ultimately determined that such individual 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 person 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, no
director 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 person may have or acquire under any statute, the Certificate of
Incorporation, the Bylaws or any agreement, vote of stockholders or
disinterested directors, or otherwise.

        The Registrant has obtained a liability insurance policy for its
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.


                                      II-2

<PAGE>   4

Item 8. Exhibits

Number            Exhibit
- ------            -------

   4        Instruments Defining the Rights of Stockholders. Reference is made
            to the Registrant's Registration Statement No. 000-25740 on Form
            8-A, and the amendment thereto, including the exhibits thereto,
            which are incorporated herein by reference pursuant to Item 3(c) of
            this Registration Statement.

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

  23.1      Consent of Ernst & Young LLP, Independent 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 (as amended November 6, 1998).

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

  99.3*     Form of Stock Option Agreement - Installment Option.

  99.4*     Form of Notice of Grant of Stock Option - Immediately Exercisable
            Option.

  99.5*     Form of 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*     Form of Stock Purchase Agreement.

  99.9*     Form of Addendum to Stock Purchase Agreement (Involuntary
            Termination Following Change in Control).

  99.10*    Form of Automatic Notice of Initial Grant.

  99.11*    Form of Automatic Notice of Annual Grant.

  99.12*    Form of Automatic Stock Option Agreement.

  99.13     1997 Non-Executive Officer Stock Option/Stock Issuance Plan (as
            amended January 18, 1999).

  99.14**   Form of Notice of Grant of Stock Option to be generally used in
            connection with the 1997 Non-Executive Officer Stock Option/Stock
            Issuance Plan.

  99.15**   Form of Stock Option Agreement to be generally used in connection
            with the Discretionary Option Grant Program of the 1997
            Non-Executive Officer Stock Option/Stock Issuance Plan.

  99.16**   Form of Addendum to Stock Option Agreement (Involuntary Termination
            Following Change in Control).

  99.17     Form of Notice of Grant of Stock Option used in connection with the
            Option granted to Mr. Uribe.

  99.18     Form of Stock Option Agreement used in connection with the Option
            granted to Mr. Uribe.

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

  *   Exhibits 99.2 through 99.12 are incorporated herein by reference to
      Exhibits 99.2 through 99.12, respectively, to Registrant's Registration
      Statement on Form S-8, Registration No. 333-44087, filed with the
      Commission on January 12, 1998.

  **  Exhibits 99.14 through 99.16 are incorporated herein by reference to
      Exhibits 10.29 through 10.31, respectively, to Registrant's Quarterly
      Report on Form 10-Q for the fiscal quarter ended March 31, 1997, filed
      with the Commission on May 15, 1997.


                                      II-3


<PAGE>   5
Item 9. Undertakings

        A. 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 or 1997 Non-Executive Officer Stock Option/Stock Issuance
Plan or the Option granted to Mr. Uribe.

        B. 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.

        C. Insofar as indemnification for liabilities arising under the 1933 Act
may be permitted to directors, officers or 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 Commission, such
indemnification is against public policy as expressed in the 1933 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, 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 whether such indemnification by it is against public
policy as expressed in the 1933 Act and will be governed by the final
adjudication of such issue.



                                      II-4

<PAGE>   6
                                   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 Calabasas, State of California on this 25th day
of August, 1999.

                                       ACT NETWORKS, INC.


                                       By: /s/ Andre de Fusco
                                           -------------------------------------
                                           Andre de Fusco
                                           President and Chief Executive Officer

                                POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS:

        That the undersigned officers and directors of ACT Networks, Inc., a
Delaware corporation, do hereby constitute and appoint Andre de Fusco and Martin
Woll 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, and any 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 regulations 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
thereof, and each of the undersigned hereby ratifies and confirms that all said
attorneys and agents, or any 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>

Signature                                            Title                                  Date
- ---------                                            -----                                  ----
<S>                                          <C>                                         <C>
/s/ Andre de Fusco                           President, Chief Executive                  August 25, 1999
- ------------------------------------         Officer and Director
Andre de Fusco                               (Principal Executive Officer)


/s/ Martin Woll                              Vice President, Finance and                 August 25, 1999
- ------------------------------------         Chief Financial Officer
Martin Woll                                  (Principal Financial Officer)


/s/ Robert J. Faulk                          Controller                                  August 25, 1999
- ------------------------------------         (Principal Accounting Officer)
Robert J. Faulk


/s/ William Ambrose                          Director                                    August 25, 1999
- ------------------------------------
William Ambrose


/s/ Harold R. Johnson                        Director                                    August 25, 1999
- ------------------------------------
Harold R. Johnson


/s/ Archie J. McGill                         Director                                    August 25, 1999
- ------------------------------------
Archie J. McGill


/s/ Frederick W. Gluck                       Director                                    August 25, 1999
- ------------------------------------
Frederick W. Gluck
</TABLE>

                                      II-5
<PAGE>   7

                       SECURITIES AND EXCHANGE COMMISSION

                                WASHINGTON, D.C.



                                    EXHIBITS

                                       TO

                                    FORM S-8

                                      UNDER

                             SECURITIES ACT OF 1933


                               ACT NETWORKS, INC.



<PAGE>   8

                                 EXHIBIT INDEX

Number                             Exhibit
- ------                             -------

   4        Instruments Defining the Rights of Stockholders. Reference is made
            to the Registrant's Registration Statement No. 000-25740 on Form
            8-A, and the amendment thereto, including the exhibits thereto,
            which are incorporated herein by reference pursuant to Item 3(c) of
            this Registration Statement.

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

  23.1      Consent of Ernst & Young LLP, Independent 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 (as amended November 6, 1998).

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

  99.3*     Form of Stock Option Agreement - Installment Option.

  99.4*     Form of Notice of Grant of Stock Option - Immediately Exercisable
            Option.

  99.5*     Form of 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*     Form of Stock Purchase Agreement.

  99.9*     Form of Addendum to Stock Purchase Agreement (Involuntary
            Termination Following Change in Control).

  99.10*    Form of Automatic Notice of Initial Grant.

  99.11*    Form of Automatic Notice of Annual Grant.

  99.12*    Form of Automatic Stock Option Agreement.

  99.13     1997 Non-Executive Officer Stock Option/Stock Issuance Plan (as
            amended January 18, 1999).

  99.14**   Form of Notice of Grant of Stock Option to be generally used in
            connection with the 1997 Non-Executive Officer Stock Option/Stock
            Issuance Plan.

  99.15**   Form of Stock Option Agreement to be generally used in connection
            with the Discretionary Option Grant Program of the 1997
            Non-Executive Officer Stock Option/Stock Issuance Plan.

  99.16**   Form of Addendum to Stock Option Agreement (Involuntary Termination
            Following Change in Control).

  99.17     Form of Notice of Grant of Stock Option used in connection with the
            Option granted to Mr. Uribe.

  99.18     Form of Stock Option Agreement used in connection with the Option
            granted to Mr. Uribe.

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

  *   Exhibits 99.2 through 99.12 are incorporated herein by reference to
      Exhibits 99.2 through 99.12, respectively, to Registrant's Registration
      Statement on Form S-8, Registration No. 333-44087, filed with the
      Commission on January 12, 1998.

  **  Exhibits 99.14 through 99.16 are incorporated herein by reference to
      Exhibits 10.29 through 10.31, respectively, to Registrant's Quarterly
      Report on Form 10-Q for the fiscal quarter ended March 31, 1997, filed
      with the Commission on May 15, 1997.


<PAGE>   1

                                                                       EXHIBIT 5


             OPINION AND CONSENT OF BROBECK, PHLEGER & HARRISON LLP


                                August 25, 1999

ACT Networks, Inc.
26707 West Agoura Road
Calabasas, California  91302


        Re: ACT Networks, Inc. Registration Statement for Offering of an
            aggregated of 600,000 Shares of Common Stock
            ------------------------------------------------------------

Ladies and Gentlemen:

        We have acted as counsel to ACT Networks, Inc., a Delaware corporation
(the "Company"), in connection with the registration statement on Form S-8 (the
"Registration Statement") under the Securities Act of 1933, as amended, of an
(i) additional 200,000 shares of the Company's common stock ("Common Stock")
authorized for issuance under the Company's 1997 Stock Incentive Plan (the
"Incentive Plan") (ii) additional 250,000 shares of the Company's Common Stock
authorized for issuance under the Company's 1997 Non-Executive Officer Stock
Option/Stock Issuance Plan (the "Non-Officer Plan") and (iii) 150,000 shares of
Common Stock issuable pursuant to the stock option granted to Mr. Uribe on
February 23, 1999 (the "Option").

        This opinion is being furnished in accordance with the requirements of
Item 8 of Form S-8 and Item 601(b)(5)(i) of Regulation S-K.

        We have reviewed the Company's charter documents and the corporate
proceedings taken by the Company in connection with the amendment of the
Incentive Plan and the Non-Officer Plan and the grant of the Option. Based on
such review, we are of the opinion that, if, as and when the shares of the
Company's Common Stock are issued and sold (and the consideration therefor
received) pursuant to (i) the provisions of the option agreements duly
authorized under the Incentive Plan or the Non-Officer Plan or pursuant to the
provisions of the Option and in accordance with the Registration Statement or
(ii) direct stock issuances duly-authorized under the Incentive Plan and
Non-Officer Plan and in accordance with the Registration Statement, such shares
will be duly authorized, legally issued, fully paid and non-assessable.

        We consent to the filing of this opinion letter as Exhibit 5 to the
Registration Statement.

        This opinion letter is rendered as of the date first written above, and
we disclaim any obligation to advise you of facts, circumstances, events or
developments which hereafter may be brought to our attention and which may
alter, affect or modify the opinion expressed herein. Our opinion is expressly
limited to the matters set forth above, and we render no opinion, whether by
implication or otherwise, as to any other matters relating to the Company, the
Incentive Plan, the Non-Officer Plan or the Option or the shares of the
Company's Common Stock issuable under the Plans or the Option.

                                            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 200,000 shares of common stock under the
1997 Stock Incentive Plan and the registration of 250,000 shares of common stock
under the 1997 Non-Executive Officer Stock Option/Stock Issuance Plan and the
registration of 150,000 shares of common stock pursuant to the option grant to
Mr. Uribe of our report dated July 29, 1998 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, 1998, filed with the Securities
and Exchange Commission.


                                                /s/ ERNST & YOUNG LLP
                                                ------------------------
                                                    ERNST & YOUNG LLP


Woodland Hills, California
August 19, 1999

<PAGE>   1
                                                                    EXHIBIT 99.1


                               ACT NETWORKS, INC.
                            1997 STOCK INCENTIVE PLAN
                  (As Amended and Restated September 18, 1998)

                                  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.

        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.


                                       1

<PAGE>   2

        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.

        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).


                                       2

<PAGE>   3

        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 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 660,000 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.


                                       3

<PAGE>   4

        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 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.


                                       4

<PAGE>   5

                                  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.

        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.


                                       5

<PAGE>   6

        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 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.


                                       6

<PAGE>   7

        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.

        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.


                                       7

<PAGE>   8

        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 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


                                       8

<PAGE>   9

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.

        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


                                       9

<PAGE>   10

        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 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.


                                       10

<PAGE>   11

                                 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,

              (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.


                                       11

<PAGE>   12

        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.

        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


                                       12

<PAGE>   13

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.


                                       13

<PAGE>   14

                                  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.

        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.


                                       14

<PAGE>   15

        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 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.


                                       15

<PAGE>   16

        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 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.


                                       16

<PAGE>   17

                                  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.

              (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.


                                       17

<PAGE>   18

        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 was amended and restated by the Board on September 10 1998
to increase the maximum number of shares of Common Stock authorized for issuance
over the term of the Plan by an additional 200,000 shares from 460,000 shares to
660,000 shares. The increase was approved by the Stockholders at the Annual
meeting on November 30, 1998.

        C. 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 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.


                                       18

<PAGE>   19

        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.


                                       19

<PAGE>   20

                                    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

              (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.


                                      A-1

<PAGE>   21

        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.

        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.


                                      A-2

<PAGE>   22

        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.

        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


                                      A-3

<PAGE>   23

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.

        BB. 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.

        CC. 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.

        DD. 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.

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

        FF. 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.

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

        HH. 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


                                      A-4

<PAGE>   24

corporation, partnership, joint venture or other business entity in which the
Corporation owns, directly or indirectly, stock or a capital or profit interest.

        II. 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.

        JJ. 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.

        KK. 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 99.13


                               ACT NETWORKS, INC.
           1997 NON-EXECUTIVE OFFICER STOCK OPTION/STOCK ISSUANCE PLAN
                          (As Amended January 18, 1999)


                                   ARTICLE ONE

                               GENERAL PROVISIONS

I. PURPOSE OF THE PLAN

        This 1997 Non-Executive Officer Stock Option/Stock Issuance 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.

        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 two 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, and

              (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).

        B. The provisions of Articles One and Four 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. Administration of the Discretionary Option Grant and Stock Issuance
Programs with respect to all persons eligible to participate in the Plan 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. The members of the Secondary Committee may be Board
members who are Employees eligible to receive discretionary option grants or
direct stock issuances under the Plan or any other stock option, stock
appreciation, stock bonus or other stock plan of the Corporation (or any Parent
or Subsidiary).


                                       1

<PAGE>   2

        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 Plan and to make such
determinations under, and issue such interpretations of, the provisions of the
Plan 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.

IV. ELIGIBILITY

        A. The persons eligible to participate in the Plan are as follows:

              (i) Employees (other than officers of the Corporation), and

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

        B. The 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 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.


                                       2

<PAGE>   3

        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.

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 950,000 shares.

        B. Shares of Common Stock subject to outstanding options 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.

        C. 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 and (ii) the number and/or class of securities and the exercise price per
share in effect under each outstanding option in order to prevent the dilution
or enlargement of benefits thereunder. The adjustments determined by the Plan
Administrator shall be final, binding and conclusive.



                                       3

<PAGE>   4

                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM

I. OPTION TERMS

        Each option shall be a Non-Statutory Option and 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.

        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 Four 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.

        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.


                                       4

<PAGE>   5

        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 to the extent it is not exercisable for
        vested shares 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.

              (v) In the event of an Involuntary Termination following a
        Corporate Transaction, the provisions of Section III of this Article Two
        shall govern the period for which the outstanding options are to remain
        exercisable following the Optionee's cessation of Service and shall
        supersede any provisions to the contrary in this section.

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


                                       5

<PAGE>   6

              (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, Options shall be exercisable only by the Optionee and shall not be
assignable or transferable other than (i) by will or by the laws of descent and
distribution following the Optionee's death or (ii) to one or more members of
the Optionee's immediate family or to a trust established exclusively for one or
more such family members in connection with the Optionee's estate plan. 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. 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), (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


                                       6

<PAGE>   7

Transaction and provides for subsequent payout in accordance with the same
vesting schedule applicable to such option 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 also 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 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 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 (i) 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) in connection with a Change in Control or (ii) to
condition such acceleration 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.


                                       7

<PAGE>   8

        G. 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.

III. 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 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.

IV. STOCK APPRECIATION RIGHTS

        A. The Plan Administrator shall have full power and authority to grant
to selected Optionees tandem 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 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.


                                       8

<PAGE>   9

                                  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 one hundred percent (100%) of the Fair
Market Value per share of Common Stock on the issuance date.

        2. Subject to the provisions of Section I of Article Four, 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,

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



                                       9

<PAGE>   10

              (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.


                                       10

<PAGE>   11

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 a Change in
Control or 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.


                                       11

<PAGE>   12

                                  ARTICLE FOUR

                                  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 options or unvested shares of Common Stock under the Plan 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 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.


                                       12

<PAGE>   13

              (ii) Stock Delivery: The election to deliver to the Corporation,
        at the time the 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 upon its adoption by the Board on the
Effective Date. In July 1997, the Board adopted an additional 250,000 share
increase in the total number of shares Common Stock reserved for issuance under
the Plan from 250,000 shares to 500,000 shares.

        B. The Plan was amended and restated by the Board, effective July 10,
1998 to increase the maximum number of shares of Common Stock authorized for
issuance over the term of the Plan by an additional 200,000 shares to 700,000
shares.

        C. The Plan was amended and restated by the Board, effective January 18,
1999 to increase the maximum number of shares of Common Stock authorized for
issuance over the term of the Plan by an additional 250,000 shares to 950,000
shares.

        D. The Plan shall terminate upon the earliest of (i) April 1, 2007, (ii)
the date on which all shares available for issuance under the Plan shall have
been issued as fully-vested shares or (iii) the termination of all outstanding
options in connection with a Corporate Transaction. Upon such Plan termination,
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

        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.

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.


                                       13

<PAGE>   14

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.



                                       14

<PAGE>   15

                                    APPENDIX

        The following definitions shall be in effect under the Plan:

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

        B. 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.

        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.


                                      A-1

<PAGE>   16

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

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

        H. EFFECTIVE DATE shall mean April 2, 1997, the date on which the Plan
was adopted by the Board.

        I. 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.

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

        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 such price
        is reported by the National Association of Securities Dealers on the
        Nasdaq National Market or any successor system. 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. 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


                                      A-2

<PAGE>   17

              (ii) such individual's voluntary resignation following (A) a
        change in his or her position with the Corporation which materially
        reduces his or her level of responsibility, (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.

        M. 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).

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

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

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

        Q. 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.

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

        S. 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.

        T. PLAN shall mean the Corporation's 1997 Non-Executive Officer Stock
Option/Stock Issuance Plan, as set forth in this document.

        U. 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


                                      A-3


<PAGE>   18

eligible persons, to the extent such entity is carrying out its administrative
functions under those programs with respect to the persons under its
jurisdiction.

        V. 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.

        W. 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.

        X. 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.

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

        Z. 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.

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

        BB. SUBSIDIARY shall mean any corporation, partnership, joint venture or
other business entity in which the Corporation owns, directly or indirectly,
stock or a capital or profit interest.

        CC. 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.

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


                                      A-4

<PAGE>   1

                                                                   EXHIBIT 99.17


                               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:                   $11.1250 per share
                                          --------------------------------------

        Number of Option Shares:
                                          --------------------------------------

        Expiration Date:
                                          --------------------------------------

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

        Installment Exercise Schedule: The Option shall become exercisable for
        twenty-four (24%) of the Option Shares upon the Optionee's completion of
        twelve (12) full months of Service measured from the Vesting
        Commencement Date. The Option shall become exercisable for the balance
        of the Option Shares in a series of thirty-eight (38) successive equal
        monthly installments upon Optionee's completion of each additional full
        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.

        Although the Option is not granted under ACT Networks, Inc. 1997 Stock
Incentive Plan (the "Plan"), the Options shall be governed by terms and
conditions substantially similar to that Plan. Optionee further agrees to be
bound by 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.

                  No Employment or Service Contract. Nothing in this Notice or
in the attached Stock Option Agreement 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.

February 23, 1999

                                            ACT NETWORKS, INC.


                                            By:_________________________________

                                            Title: President and CEO

                                            ____________________________________

                                            _______, OPTIONEE

                                            Address:____________________________

                                            ____________________________________


ATTACHMENTS
EXHIBIT A -- STOCK OPTION AGREEMENT
EXHIBIT B -- PLAN SUMMARY AND PROSPECTUS
<PAGE>   2

                                    EXHIBIT A

                             STOCK OPTION AGREEMENT



<PAGE>   3

                                    EXHIBIT B

                           PLAN SUMMARY AND PROSPECTUS



<PAGE>   1
                                                                   EXHIBIT 99.18

                                                                   OFFICER GRANT


                               ACT NETWORKS, INC.
                             STOCK OPTION AGREEMENT


RECITALS

        A. The Compensation Committee of the Board has authorized an option
grant to ______________(the "Optionee") in connection with the services he is to
perform for the Corporation (or a Parent or Subsidiary), and this Agreement is
intended to evidence the terms and conditions of that option grant.

        B. 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, 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.

        4. DATES OF EXERCISE. This option shall become exercisable for the
Option Shares in a series of 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.


                                       1

<PAGE>   2

        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 one (I)-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 or
        should Optionee otherwise engage in any Misconduct while this option is
        outstanding, 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 this 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 exercisable Option
        Shares for which the option has not otherwise 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.

              (vi) In the event of a Corporate Transaction or Change in Control,
        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.


                                       2

<PAGE>   3

        6. SPECIAL ACCELERATION OF OPTION.

        (a) This option, to the extent outstanding at the time of a Corporate
Transaction but not otherwise fully exercisable for all the Option Shares, shall
automatically accelerate 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 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 assumed by the successor corporation (or parent thereof) in
the Corporate Transaction 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 any Option Shares for which
this option is not at that time exercisable (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 installment Exercise
Schedule applicable to those 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) Upon an Involuntary Termination of Optionee's Service within
eighteen (18) months following (i) a Corporate Transaction in which this option
is assumed or (ii) a Change in Control, this option, to the extent outstanding
at that time but not otherwise fully exercisable for all the Option Shares,
shall automatically accelerate in full so that this option shall become
immediately 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. 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 (I)-year period measured from the effective date of the Involuntary
Termination, whereupon the option shall terminate and cease to be outstanding.

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

        (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.


                                       3

<PAGE>   4

        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) 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) 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 (1) 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 (11) 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.


                                       4

<PAGE>   5

              (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.

        (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. 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.
AlldecisionsofthePlanAdministratorwithrespecttoanyquestionorissuearisingunderthe
Plan or this Agreement shall be conclusive and binding on all persons having an
interest in this option.

        14. 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.


                                       5

<PAGE>   6

                                    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 on February 23, 1999.

        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 one or more Purchased Shares.


______________________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>   7

                                    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. CHANGE IN CONTROL shall mean either of the following changes in
control or ownership of the Corporation:

              (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

              (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.

        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 filly 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.

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


                                      A-1

<PAGE>   8

        H. 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.

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

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

        K. EXERCISE SCHEDULE shall mean the installment schedule specified in
the Grant Notice pursuant to which the option is to become exercisable for the
Option Shares in a series of installments over Optionee's period of Service.

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

        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 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.

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

        O. 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.



                                      A-2

<PAGE>   9

        P. 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.

        Q. 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).

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

        S. NOTICE OF EXERCISE shall mean the notice of exercise in the form
attached hereto as Exhibit 1.

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

        U. OPTIONEE shall mean Mario Uribe, the person to whom the option is
granted as specified in the Grant Notice.

        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. 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.

        X. PLAN shall mean the this Stock Option Agreement and the Grant Notice.


                                      A-3

<PAGE>   10

        Y. PLAN ADMINISTRATOR shall mean the Compensation Committee of the Board
acting its capacity as administrator of the Plan.

        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.

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

        BB. 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


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