EXHIBIT 10.3

                         LATITUDE COMMUNICATIONS, INC.

                                1999 STOCK PLAN
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     1.   PURPOSES OF THE PLAN.  The purposes of this Stock Plan are to attract
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and retain the best available personnel for positions of substantial
responsibility, to provide additional incentive to the Employees and Consultants
of the Company and to promote the success of the Company's business.  Options
granted under the Plan may be either Incentive Stock Options (as defined under
Section 422 of the Code) or Nonstatutory Stock Options, as determined by the
Administrator at the time of grant of an Option and subject to the applicable
provisions of Section 422 of the Code and the regulations promulgated
thereunder.  Stock Purchase Rights may also be granted under the Plan.

     2.   DEFINITIONS.  As used herein, the following definitions shall apply:
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          (a)  "ADMINISTRATOR" means the Board or its Committee appointed
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pursuant to Section 4 of the Plan.

          (b)  "AFFILIATE" means an entity other than a Subsidiary (as defined
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below) in which the Company owns an equity interest or which, together with the
Company, is under common control of a third person or entity.

          (c)  "APPLICABLE LAWS" means the legal requirements relating to the
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administration of stock option and restricted stock purchase plans under
applicable U.S. state corporate laws, U.S. federal and applicable state
securities laws, the Code, any Stock Exchange rules or regulations and the
applicable laws of any other country or jurisdiction where Options or Stock
Purchase Rights are granted under the Plan, as such laws, rules, regulations and
requirements shall be in place from time to time.

          (d)  "BOARD" means the Board of Directors of the Company.
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          (e)  "CHANGE OF CONTROL" means a sale of all or substantially all of
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the Company's assets, or any merger or consolidation of the Company with or into
another corporation other than a merger or consolidation in which the holders of
more than 50% of the shares of capital stock of the Company outstanding
immediately prior to such transaction continue to hold (either by the voting
securities remaining outstanding or by their being converted into voting
securities of the surviving entity) more than 50% of the total voting power
represented by the voting securities of the Company, or such surviving entity,
outstanding immediately after such transaction.

          (f)  "CODE" means the Internal Revenue Code of 1986, as amended.
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          (g)  "COMMITTEE" means one or more committees or subcommittees of the
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Board appointed by the Board to administer the Plan in accordance with Section 4
below.

 
          (h)  "COMMON STOCK" means the Common Stock of the Company.
                ------------                                        

          (i)  "COMPANY" means Latitude Communications, Inc., a Delaware
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corporation.

          (j)  "CONSULTANT" means any person, including an advisor, who renders
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services to the Company or any Parent, Subsidiary or Affiliate and is
compensated for such services, and any Director of the Company whether
compensated for such services or not.

          (k)  "CONTINUOUS SERVICE STATUS" means the absence of any interruption
                -------------------------                                       
or termination of service as an Employee or Consultant to the Company or a
Parent, Subsidiary or Affiliate.  Continuous Service Status shall not be
considered interrupted in the case of (i) sick leave; (ii) military leave; (iii)
any other leave of absence approved by the Administrator, provided that such
leave is for a period of not more than 90 days, unless reemployment upon the
expiration of such leave is guaranteed by contract or statute, or unless
provided otherwise pursuant to Company policy adopted from time to time; or (iv)
in the case of transfers between locations of the Company or between the
Company, its Parent(s), Subsidiaries, Affiliates or their respective successors.
Unless otherwise determined by the Administrator or the Company, a change in
status from an Employee to a Consultant or from a Consultant to an Employee will
not constitute a termination of Continuous Service Status.

          (l)  "CORPORATE TRANSACTION" means a sale of all or substantially all
                ---------------------                                          
of the Company's assets, or a merger, consolidation or other capital
reorganization of the Company with or into another corporation.

          (m)  "DIRECTOR" means a member of the Board.
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          (n)  "EMPLOYEE" means any person (including, if appropriate, any Named
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Executive, Officer or Director) employed by the Company or any Parent,
Subsidiary or Affiliate of the Company.  The payment by the Company of a
director's fee to a Director shall not be sufficient to constitute "employment"
of such Director by the Company.

          (o)  "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
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amended.

          (p)  "FAIR MARKET VALUE" means, as of any date, the value of Common
                -----------------                                            
Stock determined as follows:

          (i)  If the Common Stock is listed on any established stock exchange
or a national market system including without limitation the National Market of
the National Association of Securities Dealers, Inc. Automated Quotation
("Nasdaq") System, its Fair Market Value shall be the closing sales price for
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such stock (or the closing bid, if no sales were reported) as quoted on such
system or exchange on the date of determination (or if no trading or bids
occurred on the date of determination, on the last trading day prior to the date
of determination), as reported in The Wall Street Journal or such other source
as the Administrator deems reliable;

                                      -2-

 
               (ii) If the Common Stock is quoted on the Nasdaq System (but not
on the National Market thereof) or regularly quoted by a recognized securities
dealer but selling prices are not reported, its Fair Market Value shall be the
mean between the high bid and low asked prices for the Common Stock for the date
of determination (or if no bids occurred on the date of determination, on the
last trading day prior to the date of determination); or

               (iii) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Administrator. 

          (q)  "INCENTIVE STOCK OPTION" means an Option intended to qualify as
                ----------------------
an incentive stock option within the meaning of Section 422 of the Code, as
designated in the applicable Option Agreement.

          (r)  "LISTED SECURITY" means any security of the Company that is
                ---------------
listed or approved for listing on a national securities exchange or designated
or approved for designation as a national market system security on an
interdealer quotation system by the National Association of Securities Dealers,
Inc.

          (s)  "NAMED EXECUTIVE" means any individual who, on the last day of
                ---------------
the Company's fiscal year, is the chief executive officer of the Company (or is
acting in such capacity) or among the four most highly compensated officers of
the Company (other than the chief executive officer). Such officer status shall
be determined pursuant to the executive compensation disclosure rules under the
Exchange Act.

          (t)  "NONSTATUTORY STOCK OPTION" means an Option not intended to
                -------------------------                                 
qualify as an Incentive Stock Option, as designated in the applicable Option
Agreement.

          (u)  "OFFICER" means a person who is an officer of the Company within
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the meaning of Section 16(a) of the Exchange Act and the rules and regulations
promulgated thereunder.

          (v)  "OPTION" means a stock option granted pursuant to the Plan.
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          (w)  "OPTION AGREEMENT" means a written document, the form(s) of which
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shall be approved from time to time by the Administrator, reflecting the terms
of an Option granted under the Plan and includes any documents attached to or
incorporated into such Option Agreement, including, but not limited to, a notice
of stock option grant and a form of exercise notice.

          (x)  "OPTION EXCHANGE PROGRAM" means a program approved by the
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Administrator whereby outstanding Options are exchanged for Options with a lower
exercise price.

          (y)  "OPTIONED STOCK" means the Common Stock subject to an Option.
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          (z)  "OPTIONEE" means an Employee or Consultant who receives an
                --------
                Option.

                                      -3-

 
          (aa) "PARENT" means a "parent corporation," whether now or hereafter
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existing, as defined in Section 424(e) of the Code.

          (bb) "PARTICIPANT" means any holder of one or more Options or Stock
                -----------                                                  
Purchase Rights, or the Shares issuable or issued upon exercise of such awards,
under the Plan.

          (cc) "PLAN" means this 1999 Stock Plan.
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          (dd) "REPORTING PERSON" means an Officer, Director or greater than 10%
                ----------------                                                
stockholder of the Company within the meaning of Rule 16a-2 of the Exchange Act,
who is required to file reports pursuant to Rule 16a-3 of the Exchange Act.

          (ee) "RESTRICTED STOCK" means shares of Common Stock acquired pursuant
                ----------------                                                
to a grant of a Stock Purchase Right under Section 11 below.

          (ff) "RESTRICTED STOCK PURCHASE AGREEMENT" means a written document,
                -----------------------------------                           
the form(s) of which shall be approved from time to time by the Administrator,
reflecting the terms of a Stock Purchase Right granted under the Plan and
includes any documents attached to such agreement.

          (gg) "RULE 16B-3" means Rule 16b-3 promulgated under the Exchange Act,
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as amended from time to time, or any successor provision.

          (hh) "SHARE" means a share of the Common Stock, as adjusted in
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accordance with Section 14 of the Plan.

          (ii) "STOCK EXCHANGE" means any stock exchange or consolidated stock
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price reporting system on which prices for the Common Stock are quoted at any
given time.

          (jj) "STOCK PURCHASE RIGHT" means the right to purchase Common Stock
                --------------------                                          
pursuant to Section 11 below.

          (kk) "SUBSIDIARY" means a "subsidiary corporation," whether now or
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hereafter existing, as defined in Section 424(f) of the Code.

          (ll) "TEN PERCENT HOLDER" means a person who owns stock representing
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more than ten percent (10%) of the voting power of all classes of stock of the
Company or any Parent or Subsidiary.

     3.   STOCK SUBJECT TO THE PLAN.  Subject to the provisions of Section 14 of
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the Plan, the maximum aggregate number of shares that may be sold under the Plan
is 2,700,000/1/ Shares of Common Stock.  The Shares may be authorized, but
unissued, or reacquired Common Stock.

     If an Option expires or becomes unexercisable for any reason without having
been exercised in full, or is surrendered pursuant to an Option Exchange
Program, the unpurchased 

________________
/1/ Adjusted to reflect the three-for-two stock split to be effected prior to
the Company's initial public offering.

                                      -4-

 
Shares that were subject thereto shall, unless the Plan has been terminated,
become available for future grant under the Plan. In addition, any Shares of
Common Stock that are retained by the Company upon exercise of an Option or
Stock Purchase Right in order to satisfy the exercise or purchase price for such
Option or Stock Purchase Right or any withholding taxes due with respect to such
exercise or purchase shall be treated as not issued and shall continue to be
available under the Plan. Shares issued under the Plan and later repurchased by
the Company pursuant to any repurchase right that the Company may have shall not
be available for future grant under the Plan.

     4.   ADMINISTRATION OF THE PLAN.
          -------------------------- 

          (a)  GENERAL.  The Plan shall be administered by the Board or a
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Committee, or a combination thereof, as determined by the Board.  The Plan may
be administered by different administrative bodies with respect to different
classes of Participants and, if permitted by the Applicable Laws, the Board may
authorize one or more officers (who may (but need not) be Officers) to grant
Options or Stock Purchase Rights to Employees and Consultants.

          (b)  ADMINISTRATION WITH RESPECT TO REPORTING PERSONS. With respect to
               ------------------------------------------------
Options granted to Reporting Persons and Named Executives, the Plan may (but
need not) be administered so as to permit such Options to qualify for the
exemption set forth in Rule 16b-3 and to qualify as performance-based
compensation under Section 162(m) of the Code.

          (c)  COMMITTEE COMPOSITION. If a Committee has been appointed pursuant
               --------------------- 
to this Section 4, such Committee shall continue to serve in its designated
capacity until otherwise directed by the Board. From time to time the Board may
increase the size of any Committee and appoint additional members thereof,
remove members (with or without cause) and appoint new members in substitution
therefor, fill vacancies (however caused) and remove all members of a Committee
and thereafter directly administer the Plan, all to the extent permitted by the
Applicable Laws and, in the case of a Committee administering the Plan pursuant
to Section 4(b) above, to the extent permitted or required by Rule 16b-3 and
Section 162(m) of the Code.

          (d)  POWERS OF THE ADMINISTRATOR.  Subject to the provisions of the
               ---------------------------                                   
Plan and in the case of a Committee, the specific duties delegated by the Board
to such Committee, the Administrator shall have the authority, in its
discretion:

               (i)   to determine the Fair Market Value of the Common Stock, in
accordance with Section 2(p) of the Plan;

               (ii)  to select the Employees and Consultants to whom Options and
Stock Purchase Rights or any combination thereof may from time to time be
granted;

               (iii) to determine whether and to what extent Options and Stock
Purchase Rights or any combination thereof are granted;

               (iv)  to determine the number of Shares of Common Stock to be
covered by each such award granted;

                                      -5-

 
               (v)    to approve forms of agreement for use under the Plan;

               (vi)   to determine the terms and conditions, not inconsistent
with the terms of the Plan, of any award granted hereunder, which terms and
conditions include but are not limited to the exercise or purchase price, the
time or times when Options or Stock Purchase Rights may be exercised (which may
be based on performance criteria), any vesting acceleration or waiver of
forfeiture restrictions, and any restriction or limitation regarding any Option,
Optioned Stock, Stock Purchase Right or Restricted Stock, based in each case on
such factors as the Administrator, in its sole discretion, shall determine;

               (vii)  to determine whether and under what circumstances an
Option may be settled in cash under Section 10(f) instead of Common Stock;

               (viii) to reduce the exercise price of any Option to the then
current Fair Market Value if the Fair Market Value of the Common Stock covered
by such Option shall have declined since the date the Option was granted and to
make any other amendments or adjustments to any Option that the Administrator
determines, in its discretion and under the authority granted to it under the
Plan, to be necessary or advisable, provided however that no amendment or
adjustment to an Option that would materially and adversely affect the rights of
any Optionee shall be made without the prior written consent of the Optionee;

               (ix)   to determine the terms and restrictions applicable to
Stock Purchase Rights and the Restricted Stock purchased by exercising such
Stock Purchase Rights;

               (x)    to initiate an Option Exchange Program;

               (xi)   to construe and interpret the terms of the Plan and awards
granted under the Plan; and

               (xii)  in order to fulfill the purposes of the Plan and without
amending the Plan, to modify grants of Options or Stock Purchase Rights to
Participants who are foreign nationals or employed outside of the United States
in order to recognize differences in local law, tax policies or customs.

          (e)  EFFECT OF ADMINISTRATOR'S DECISION. All decisions, determinations
               ----------------------------------
and interpretations of the Administrator shall be final and binding on all
Participants.

     5.  ELIGIBILITY.
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         (a)  RECIPIENTS OF GRANTS.  Nonstatutory Stock Options and Stock
              --------------------                                       
Purchase Rights may be granted to Employees and Consultants.  Incentive Stock
Options may be granted only to Employees, provided however that Employees of
Affiliates shall not be eligible to receive Incentive Stock Options.  An
Employee or Consultant who has been granted an Option or Stock Option Right may,
if he or she is otherwise eligible, be granted additional Options or Stock
Purchase Rights.

                                      -6-

 
          (b)  TYPE OF OPTION.  Each Option shall be designated in the Option
               --------------                                                
Agreement as either an Incentive Stock Option or a Nonstatutory Stock Option.
However, notwithstanding such designations, to the extent that the aggregate
Fair Market Value of Shares with respect to which Options are exercisable for
the first time by an Optionee during any calendar year (under all plans of the
Company or any Parent or Subsidiary) exceeds $100,000, such excess Options shall
be treated as Nonstatutory Stock Options.  For purposes of this Section 5(b),
Incentive Stock Options shall be taken into account in the order in which they
were granted, and the Fair Market Value of the Shares shall be determined as of
the date of grant of such Option.

          (c)  NO EMPLOYMENT RIGHTS.  The Plan shall not confer upon any
               --------------------                                     
Participant any right with respect to continuation of employment or consulting
relationship with the Company, nor shall it interfere in any way with his or her
right or the Company's right to terminate his or her employment or consulting
relationship at any time, with or without cause.

     6.   TERM OF PLAN. The Plan shall become effective upon its adoption by the
          ------------
Board. It shall continue in effect for a term of ten (10) years unless sooner
terminated under Section 16 of the Plan.

     7.   TERM OF OPTION.  The term of each Option shall be the term stated in
          --------------                                                      
the Option Agreement; provided however that the term shall be no more than ten
(10) years from the date of grant thereof or such shorter term as may be
provided in the Option Agreement and provided further that, in the case of an
Incentive Stock Option granted to a person who at the time of such grant is a
Ten Percent Holder, the term of such Incentive Stock Option shall be five (5)
years from the date of grant thereof or such shorter term as may be provided in
the Option Agreement.

     8.   LIMITATION ON GRANTS TO EMPLOYEES.  Subject to adjustment as provided
          ---------------------------------                                    
in Section 13 below, the maximum number of Shares which may be subject to
Options and Stock Purchase Rights granted to any one Employee under this Plan
for any fiscal year of the Company shall be 2,700,000 Shares.

     9.   OPTION EXERCISE PRICE AND CONSIDERATION.
          --------------------------------------- 

          (a)  EXERCISE PRICE. The per Share exercise price for the Shares to be
               --------------
issued pursuant to exercise of an Option shall be such price as is determined by
the Administrator and set forth in the Option Agreement, but shall be subject to
the following:

               (i)  In the case of an Incentive Stock Option

                    (A)  granted to an Employee who at the time of grant is a
Ten Percent Holder, the per Share exercise price shall be no less than 110% of
the Fair Market Value per Share on the date of grant; or

                    (B)  granted to any other Employee, the per Share exercise
price shall be no less than 100% of the Fair Market Value per Share on the date
of grant.

                                      -7-

 
               (ii) In the case of a Nonstatutory Stock Option

                    (A) granted prior to the date, if any, on which the Common
Stock becomes a Listed Security to a person who is at the time of grant is a Ten
Percent Holder, the per Share exercise price shall be no less than 110% of the
Fair Market Value per Share on the date of grant if required by the Applicable
Laws and, if not so required, shall be such price as is determined by the
Administrator;

                    (B) granted to a person who, at the time of the grant of
such Option, is a Named Executive of the Company, the per share Exercise Price
shall be no less than 100% of the Fair Market Value on the date of grant if such
Option is intended to qualify as performance-based compensation under Section
162(m) of the Code; or

                    (C) granted prior to the date, if any, on which the Common
Stock becomes a Listed Security to any person other than a Named Executive or a
Ten Percent Holder, the per Share exercise price shall be no less than 85% of
the Fair Market Value per Share on the date of grant if required by Applicable
Law and, if not so required, shall be such price as is determined by the
Administrator.

               (iii) Notwithstanding the foregoing, Options may be granted with
a per Share exercise price other than as required above pursuant to a merger or
other corporate transaction.

          (b)  PERMISSIBLE CONSIDERATION.  The consideration to be paid for the
               -------------------------                                       
Shares to be issued upon exercise of an Option, including the method of payment,
shall be determined by the Administrator (and, in the case of an Incentive Stock
Option, shall be determined at the time of grant) and may consist entirely of
(1) cash; (2) check; (3) delivery of Optionee's promissory note with such
recourse, interest, security and redemption provisions as the Administrator
determines to be appropriate (subject to the provisions of Section 153 of the
Delaware General Corporation Law); (4) cancellation of indebtedness; (5) other
Shares that (x) in the case of Shares acquired upon exercise of an Option either
have been owned by the Optionee for more than six months on the date of
surrender (or such other period as may be required to avoid a charge to the
Company's earnings) or were not acquired, directly or indirectly, from the
Company, and (y) have a Fair Market Value on the date of surrender equal to the
aggregate exercise price of the Shares as to which the Option is exercised; (6)
authorization from the Company to retain from the total number of Shares as to
which the Option is exercised that number of Shares having a Fair Market Value
on the date of exercise equal to the exercise price for the total number of
Shares as to which the Option is exercised; (7) delivery of a properly executed
exercise notice together with such other documentation as the Administrator and
the broker, if applicable, shall require to effect exercise of the Option and
prompt delivery to the Company of the sale or loan proceeds required to pay the
exercise price and any applicable withholding taxes; (8) any combination of the
foregoing methods of payment; or (9) such other consideration and method of
payment for the issuance of Shares to the extent permitted under the Applicable
Laws.  In making its determination as to the type of consideration to accept,
the Administrator shall consider if acceptance of such consideration may be
reasonably expected to 

                                      -8-

 
benefit the Company and the Administrator may refuse to accept a particular form
of consideration at the time of any Option exercise if, in its sole discretion,
acceptance of such form of consideration is not in the best interests of the
Company at such time.

     10.  EXERCISE OF OPTION.
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          (a)  PROCEDURE FOR EXERCISE; RIGHTS AS A STOCKHOLDER.  Any Option
               -----------------------------------------------             
granted hereunder shall be exercisable at such times and under such conditions
as determined by the Administrator, consistent with the terms of the Plan, and
reflected in the Option Agreement, including vesting requirements and/or
performance criteria with respect to the Company and/or the Optionee; provided
however that, if required by the Applicable Laws, any Option granted prior to
the date, if any, upon which the Common Stock becomes a Listed Security shall
become exercisable at a rate of at least 20% per year over five years from the
date the Option is granted. In the event that any of the Shares issued upon
exercise of an Option (which exercise occurs prior to the date, if any, upon
which the Common Stock becomes a Listed Security) should be subject to a right
of repurchase in the Company's favor, such repurchase right shall, if required
by the Applicable Laws, lapse at the rate of at least 20% per year over five
years from the date the Option is granted. Notwithstanding the above, in the
case of an Option granted to an officer (including but not limited to Officers),
Director or Consultant, the Option may become exercisable, or a repurchase
right, if any, in favor of the Company shall lapse, at any time or during any
period established by the Administrator. The Administrator shall have the
discretion to determine whether and to what extent the vesting of Options shall
be tolled during any unpaid leave of absence; provided however that in the
absence of such determination, vesting of Options shall be tolled during any
such leave.

          An Option may not be exercised for a fraction of a Share.

          An Option shall be deemed exercised when written notice of such
exercise has been given to the Company in accordance with the terms of the
Option by the person entitled to exercise the Option and the Company has
received full payment for the Shares. Full payment may, as authorized by the
Administrator, consist of any consideration and method of payment allowable
under Section 9(b) of the Plan. Until the issuance (as evidenced by the
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the stock certificate evidencing such Shares, no right
to vote or receive dividends or any other rights as a stockholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such stock certificate promptly
upon exercise of the Option. No adjustment will be made for a dividend or other
right for which the record date is prior to the date the stock certificate is
issued, except as provided in Section 14 of the Plan.

          Exercise of an Option in any manner shall result in a decrease in the
number of Shares that thereafter may be available, both for purposes of the Plan
and for sale under the Option, by the number of Shares as to which the Option is
exercised.

          (b)  TERMINATION OF STATUS AS AN EMPLOYEE OR CONSULTANT.  Subject to
               --------------------------------------------------             
Section 14(d), in the event of termination of an Optionee's Continuous Service
Status, such

                                      -9-

 
Optionee may, but only within three (3) months (or such other period of time,
not less than thirty (30) days, as is determined by the Administrator, with such
determination in the case of an Incentive Stock Option being made at the time of
grant of the Option) after the date of such termination (but in no event later
than the date of expiration of the term of such Option as set forth in the
Option Agreement), exercise his or her Option to the extent that he or she was
entitled to exercise it at the date of such termination. Subject to Section
14(d), to the extent that the Optionee was not entitled to exercise the Option
at the date of such termination, or if the Optionee does not exercise the Option
to the extent so entitled within the time specified above, the Option shall
terminate and the Optioned Stock underlying the unexercised portion of the
Option shall revert to the Plan. Unless otherwise determined by the
Administrator or the Company, no termination shall be deemed to occur and this
Section 10(b) shall not apply if (i) the Optionee is a Consultant who becomes an
Employee, or (ii) the Optionee is an Employee who becomes a Consultant.

          (c)  DISABILITY OF OPTIONEE.  Notwithstanding Section 10(b) above, in
               ----------------------                                          
the event of termination of an Optionee's Continuous Service Status as a result
of his or her total and permanent disability (as defined in Section 22(e)(3) of
the Code), such Optionee may, but only within twelve (12) months (or such other
period of time as is determined by the Administrator, with such determination in
the case of an Incentive Stock Option made at the time of grant of the Option)
from the date of such termination (but in no event later than the date of
expiration of the term of such Option as set forth in the Option Agreement),
exercise the Option to the extent he or she was entitled to exercise it at the
date of such termination. To the extent that the Optionee was not entitled to
exercise the Option at the date of termination, or if the Optionee does not
exercise the Option to the extent so entitled within the time specified above,
the Option shall terminate and the Optioned Stock underlying the unexercised
portion of the Option shall revert to the Plan.

          (d)  DEATH OF OPTIONEE.  In the event of the death of an Optionee
               -----------------                                           
during the period of Continuous Service Status since the date of grant of the
Option, or within 30 days following termination of the Optionee's Continuous
Service Status, the Option may be exercised at any time within twelve (12)
months following the date of death (but in no event later than the expiration
date of the term of such Option as set forth in the Option Agreement) by such
Optionee's estate or by a person who acquired the right to exercise the Option
by bequest or inheritance, but only to the extent of the right to exercise that
had accrued at the date of death or, if earlier, the date of termination of the
Optionee's Continuous Service Status. To the extent that the Optionee was not
entitled to exercise the Option at the date of death or termination, as the case
may be, or if the Optionee does not exercise such Option to the extent so
entitled within the time specified above, the Option shall terminate and the
Optioned Stock underlying the unexercised portion of the Option shall revert to
the Plan.

          (e)  EXTENSION OF EXERCISE PERIOD.  The Administrator shall have full
               ----------------------------                                    
power and authority to extend the period of time for which an Option is to
remain exercisable following termination of an Optionee's Continuous Service
Status from the periods set forth in Sections 10(b), 10(c) and 10(d) above or in
the Option Agreement to such greater time as the

                                      -10-

 
Board shall deem appropriate, provided that in no event shall such Option be
exercisable later than the date of expiration of the term of such Option as set
forth in the Option Agreement.

          (f) BUY-OUT PROVISIONS.  The Administrator may at any time offer to
              ------------------                                             
buy out for a payment in cash or Shares an Option previously granted under the
Plan based on such terms and conditions as the Administrator shall establish and
communicate to the Optionee at the time such offer is made.

     11.  STOCK PURCHASE RIGHTS.
          --------------------- 

          (a) RIGHTS TO PURCHASE.  Stock Purchase Rights may be issued either
              ------------------                                             
alone, in addition to, or in tandem with other awards granted under the Plan
and/or cash awards made outside of the Plan. After the Administrator determines
that it will offer Stock Purchase Rights under the Plan, it shall advise the
offeree in writing of the terms, conditions and restrictions related to the
offer, including the number of Shares that such person shall be entitled to
purchase, the price to be paid, and the time within which such person must
accept such offer, which shall in no event exceed 30 days from the date upon
which the Administrator made the determination to grant the Stock Purchase
Right. In the case of a Stock Purchase Right granted prior to the date, if any,
on which the Common Stock becomes a Listed Security and if required by the
Applicable Laws at such time, the purchase price of Shares subject to such Stock
Purchase Rights shall not be less than 85% of the Fair Market Value of the
Shares as of the date of the offer, or, in the case of a person owning stock
representing more than 10% of the total combined voting power of all classes of
stock of the Company or any Parent or Subsidiary, the price shall not be less
than 100% of the Fair Market Value of the Shares as of the date of the offer. If
the Applicable Laws do not impose the requirements set forth in the preceding
sentence and with respect to any Stock Purchase Rights granted after the date,
if any, on which the Common Stock becomes a Listed Security, the purchase price
of Shares subject to Stock Purchase Rights shall be as determined by the
Administrator. The offer to purchase Shares subject to Stock Purchase Rights
shall be accepted by execution of a Restricted Stock Purchase Agreement in the
form determined by the Administrator.

          (b) REPURCHASE OPTION.  Unless the Administrator determines otherwise,
              -----------------                                                 
the Restricted Stock Purchase Agreement shall grant the Company a repurchase
option exercisable upon the voluntary or involuntary termination of the
purchaser's employment with the Company for any reason (including death or
disability), subject to Section 14(d). The purchase price for Shares repurchased
pursuant to the Restricted Stock Purchase Agreement shall be the original
purchase price paid by the purchaser and may be paid by cancellation of any
indebtedness of the purchaser to the Company. Subject to Section 14(d), the
repurchase option shall lapse at such rate as the Administrator may determine;
provided however that with respect to a Stock Purchase Right granted prior to
the date, if any, on which the Common Stock becomes a Listed Security to a
purchaser who is not an officer (including an Officer), Director or Consultant
of the Company or of any Parent or Subsidiary of the Company, it shall lapse at
a minimum rate of 20% per year if required by the Applicable Laws.

                                      -11-

 
          (c) OTHER PROVISIONS.  The Restricted Stock Purchase Agreement shall
              ----------------                                                
contain such other terms, provisions and conditions not inconsistent with the
Plan as may be determined by the Administrator in its sole discretion. In
addition, the provisions of Restricted Stock Purchase Agreements need not be the
same with respect to each purchaser.

          (d) RIGHTS AS A STOCKHOLDER.  Once the Stock Purchase Right is
              -----------------------                                   
exercised, the purchaser shall have the rights equivalent to those of a
stockholder, and shall be a stockholder when his or her purchase is entered upon
the records of the duly authorized transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the Stock Purchase Right is exercised, except as provided in Section 14
of the Plan.

     12.  TAXES.
          ----- 

          (a) As a condition of the exercise of an Option or Stock Purchase
Right granted under the Plan, the Participant (or in the case of the
Participant's death, the person exercising the Option or Stock Purchase Right)
shall make such arrangements as the Administrator may require for the
satisfaction of any applicable federal, state, local or foreign withholding tax
obligations that may arise in connection with the exercise of Option or Stock
Purchase Right and the issuance of Shares. The Company shall not be required to
issue any Shares under the Plan until such obligations are satisfied.

          (b) In the case of an Employee and in the absence of any other
arrangement, the Employee shall be deemed to have directed the Company to
withhold or collect from his or her compensation an amount sufficient to satisfy
such tax obligations from the next payroll payment otherwise payable after the
date of an exercise of the Option or Stock Purchase Right.

          (c) This Section 12(c) shall apply only after the date, if any, upon
which the Common Stock becomes a Listed Security. In the case of Participant
other than an Employee (or in the case of an Employee where the next payroll
payment is not sufficient to satisfy such tax obligations, with respect to any
remaining tax obligations), in the absence of any other arrangement and to the
extent permitted under the Applicable Laws, the Participant shall be deemed to
have elected to have the Company withhold from the Shares to be issued upon
exercise of the Option or Stock Purchase Right that number of Shares having a
Fair Market Value determined as of the applicable Tax Date (as defined below)
equal to the amount required to be withheld. For purposes of this Section 12,
the Fair Market Value of the Shares to be withheld shall be determined on the
date that the amount of tax to be withheld is to be determined under the
Applicable Laws (the "Tax Date").
                      --------   

          (d) If permitted by the Administrator, in its discretion, a
Participant may satisfy his or her tax withholding obligations upon exercise of
an Option or Stock Purchase Right by surrendering to the Company Shares that (i)
in the case of Shares previously acquired from the Company, have been owned by
the Participant for more than six (6) months on the date of surrender, and (ii)
have a Fair Market Value determined as of the applicable Tax Date equal to the
amount required to be withheld.

                                      -12-

 
          (e) Any election or deemed election by a Participant to have Shares
withheld to satisfy tax withholding obligations under Section 12(c) or (d) above
shall be irrevocable as to the particular Shares as to which the election is
made and shall be subject to the consent or disapproval of the Administrator.
Any election by a Participant under Section 12(d) above must be made on or prior
to the applicable Tax Date.

          (f) In the event an election to have Shares withheld is made by a
Participant and the Tax Date is deferred under Section 83 of the Code because no
election is filed under Section 83(b) of the Code, the Participant shall receive
the full number of Shares with respect to which the Option or Stock Purchase
Right is exercised but such Participant shall be unconditionally obligated to
tender back to the Company the proper number of Shares on the applicable Tax
Date.

     13.  NON-TRANSFERABILITY OF OPTIONS AND STOCK PURCHASE RIGHTS.  Options and
          --------------------------------------------------------              
Stock Purchase Rights may not be sold, pledged, assigned, hypothecated,
transferred or disposed of in any manner other than by will or by the laws of
descent or distribution; provided that, after the date, if any, upon which the
Common Stock becomes a Listed Security, the Administrator may in its discretion
grant transferable Nonstatutory Stock Options pursuant to Option Agreements
specifying (i) the manner in which such Nonstatutory Stock Options are
transferable and (ii) that any such transfer shall be subject to the Applicable
Laws. The designation of a beneficiary by an Optionee will not constitute a
transfer. An Option or Stock Purchase Right may be exercised, during the
lifetime of the holder of Option or Stock Purchase Right, only by such holder or
a transferee permitted by this Section 13.

     14.  ADJUSTMENTS UPON CHANGES IN CAPITALIZATION, CORPORATE TRANSACTIONS AND
          ----------------------------------------------------------------------
CERTAIN OTHER TRANSACTIONS.
- -------------------------- 

          (a) CHANGES IN CAPITALIZATION.  Subject to any required action by the
              -------------------------                                        
stockholders of the Company, the number of shares of Common Stock covered by
each outstanding Option or Stock Purchase Right, the number of Shares set forth
in Sections 3(a)(i) and 8 above, and the number of shares of Common Stock that
have been authorized for issuance under the Plan but as to which no Options or
Stock Purchase Rights have yet been granted or that have been returned to the
Plan upon cancellation or expiration of an Option or Stock Purchase Right, as
well as the price per Share of Common Stock covered by each such outstanding
Option or Stock Purchase Right, shall be proportionately adjusted for any
increase or decrease in the number of issued Shares of Common Stock resulting
from a stock split, reverse stock split, stock dividend, combination,
recapitalization or reclassification of the Common Stock (including any change
in the number of Shares of Common Stock effected in connection with a change of
domicile of the Company), or any other increase or decrease in the number of
issued Shares of Common Stock effected without receipt of consideration by the
Company; provided however that conversion of any convertible securities of the
Company shall not be deemed to have been "effected without receipt of
consideration." Such adjustment shall be made by the Administrator, whose
determination in that respect shall be final, binding and conclusive. Except as
expressly provided herein, no issuance by the Company of shares of stock of any
class, or securities convertible into shares of stock of any class, shall
affect, and no adjustment by

                                      -13-

 
reason thereof shall be made with respect to, the number or price of Shares of
Common Stock subject to an Option or Stock Purchase Right.

          (b) DISSOLUTION OR LIQUIDATION.  In the event of the dissolution or
              --------------------------                                     
liquidation of the Company, each outstanding Option or Stock Purchase Right
shall terminate immediately prior to the consummation of the transaction, unless
otherwise provided by the Administrator.

          (c) CHANGE OF CONTROL. In the event of a Change of Control or
              -----------------                                        
Corporate Transaction, each outstanding Option or Stock Purchase Right shall be
assumed or an equivalent option or right shall be substituted by the successor
corporation or a parent or subsidiary of such successor corporation. For
purposes of this Section 14(c), an Option or a Stock Purchase Right shall be
considered assumed, without limitation, if, at the time of issuance of the stock
or other consideration upon such Change of Control, each holder of an Option or
a Stock Purchase Right would be entitled to receive upon exercise of the Option
or Stock Purchase Right the same number and kind of shares of stock or the same
amount of property, cash or securities as such holder would have been entitled
to receive upon the occurrence of such Change of Control if the holder had been,
immediately prior to such Change of Control, the holder of the number of Shares
of Common Stock covered by the Option or the Stock Purchase Right at such time
(after giving effect to any adjustments in the number of Shares covered by the
Option or Stock Purchase Right as provided for in this Section 14).

              In the event that, following a Change of Control, the successor
corporation does not agree to assume the Option or Stock Purchase Right or to
substitute an equivalent option or right, then (x) in the case of an Option, the
unvested shares under such Option shall automatically be accelerated such that
an additional 50% of the total number of unvested shares as of the effective
date of the Change of Control shall automatically become vested, and (y) in the
case of a Stock Purchase Right, any rights of repurchase with respect to such
Stock Purchase Right shall automatically terminate with respect to 50% of the
total number of unvested shares as of the effective date of the Change of
Control, and the Company shall provide written notice to the holder of the
Option or Stock Purchase Right of the termination of such vesting provisions or
rights of repurchase. In the case of an Option, the holder shall be entitled to
exercise such Option for a period of 15 business days following the date that
such notice is given.

          (d) TERMINATION FOLLOWING A CHANGE OF CONTROL.  If the holder of an
              -----------------------------------------                      
Option or Stock Purchase Right is an Employee and such holder's employment
terminates as a result of Involuntary Termination other than for Cause (as such
terms are defined below) at any time within 24 months following a Change of
Control, then, subject to Subsection (e) below, then (x) in the case of an
Option, the unvested shares under such Option shall automatically be accelerated
such that an additional 50% of the total number of unvested shares as of the
effective date of such Involuntary Termination shall automatically become
vested, and (y) in the case of a Stock Purchase Right, any rights of repurchase
with respect to such Stock Purchase Right shall automatically terminate with
respect to 50% of the total number of unvested shares as of the effective date
of the Involuntary Termination.Notwithstanding the foregoing, no such vesting
acceleration shall occur if such vesting acceleration would cause a contemplated
Change of Control transaction that was intended to be accounted for as a
"pooling-of-interests" transaction

                                      -14-

 
to become ineligible for such accounting treatment under generally accepted
accounting principles, as determined by the Company's independent public
accountants (the "Accountants") prior to the Change of Control.

          (e)  LIMITATION ON PAYMENTS.  In the event that the vesting 
               ----------------------
acceleration provided for in Subsection (c) above (i) constitutes "parachute
payments" within the meaning of Section 280G of the Internal Revenue Code of
1986, as amended (the "Code"), and (ii) but for this Subsection (e), would be
subject to the excise tax imposed by Section 4999 of the Code (or any
corresponding provisions of state income tax law), then the vesting acceleration
pursuant to Subsection (c) above shall be either

               (i)  delivered in full, or

               (ii) delivered as to such lesser extent which would result in no
portion of such severance benefits being subject to excise tax under Section
4999 of the Code, whichever of the foregoing amounts, taking into account the
applicable federal, state and local income taxes and the excise tax imposed by
Section 4999, results in the receipt by the holder of an Option or Stock
Purchase Right on an after-tax-basis, of the greater amount of severance
benefits, notwithstanding that all or some portion of such severance benefits
may be taxable under Section 4999 of the Code. Any determination required under
this Subsection (e) shall be made in writing by the Company's independent
accountants, whose determination shall be conclusive and binding on the Company
and all holders of Options and Stock Purchase Rights for all purposes. In the
event that subdivision (i) above applies, then the holder of the Option or Stock
Purchase Rights shall be responsible for any excise taxes imposed with respect
to such severance and other benefits. In the event that subdivision (ii) above
applies, then each benefit provided hereunder shall be proportionately reduced
to the extent necessary to avoid imposition of such excise taxes.

          (f)  DEFINITION OF TERMS.  The following terms used in Subsections (c)
               -------------------                                              
through (d) shall have the following meanings:

               (i)  CAUSE.  "Cause" shall mean (i) gross negligence or willful
                    -----
misconduct in the performance of an employee's duties to the Company; (ii)
repeated unexplained or unjustified absence from the Company; (iii) a material
and willful violation of any federal or state law; (iv) refusal or failure to
act in accordance with any specific direction or order of the Company; (v)
commission of any act of fraud with respect to the Company; or (vi) conviction
of or plea of no contest to a felony or a crime involving moral turpitude
causing material harm to the standing and reputation of the Company, in each
case as determined by the Board of Directors of the Company.

               (ii) INVOLUNTARY TERMINATION. "Involuntary Termination" shall 
                    -----------------------
mean (i) without an employee's express written consent, the significant
reduction of such employee's duties, authority or responsibilities, relative to
the such employee's duties, authority or responsibilities as in effect
immediately prior to such reduction, or the assignment to the employee of such
reduced duties, authority or responsibilities, provided, however, that the
assignment of the employee to a position with the same title as the employee
then holds, or substantially similar title, in a business unit, division or
subsidiary of the Company following a

                                      -15-

 
Change of Control or a company into which the Company is merged in a Change of
Control or otherwise acquiring assets or voting shares of the Company in
connection with a Change of Control, or a parent of such a company, shall not
constitute a significant reduction of duties, authority or responsibilities;
(ii) a material reduction by the Company in the base salary of the employee as
in effect immediately prior to such reduction; (iii) a material reduction by the
Company in the kind or level of employee benefits, including bonuses, to which
the employee was entitled immediately prior to such reduction with the result
that the employee's overall benefits package is significantly reduced; (iv) the
relocation of the employee to a facility or a location more than fifty miles
from the employee's then present location, without the employee's express
written consent; or (v) any act or set of facts or circumstances which would,
under California case law or statute, constitute a constructive termination of
the employee.

          (g) CERTAIN DISTRIBUTIONS.  In the event of any distribution to the
              ---------------------                                          
Company's stockholders of securities of any other entity or other assets (other
than dividends payable in cash or stock of the Company) without receipt of
consideration by the Company, the Administrator may, in its discretion,
appropriately adjust the price per Share of Common Stock covered by each
outstanding Option or Stock Purchase Right to reflect the effect of such
distribution.

     15.  TIME OF GRANTING OPTIONS AND STOCK PURCHASE RIGHTS.  The date of grant
          --------------------------------------------------                    
of an Option or Stock Purchase Right shall, for all purposes, be the date on
which the Administrator makes the determination granting such Option or Stock
Purchase Right, or such other date as is determined by the Administrator;
provided however that in the case of an Incentive Stock Option, the grant date
shall be the later of the date on which the Administrator makes the
determination granting such Incentive Stock Option or the date of commencement
of the Optionee's employment relationship with the Company. Notice of the
determination shall be given to each Employee or Consultant to whom an Option or
Stock Purchase Right is so granted within a reasonable time after the date of
such grant.

     16.  AMENDMENT AND TERMINATION OF THE PLAN.
          ------------------------------------- 

          (a) AMENDMENT AND TERMINATION.  The Board may at any time amend, 
              -------------------------                                   
alter, suspend, discontinue or terminate the Plan, but no amendment, alteration,
suspension, discontinuance or termination (other than an adjustment made
pursuant to Section 14 above) shall be made that would materially and adversely
affect the rights of any Optionee or holder of Stock Purchase Rights under any
outstanding grant, without his or her consent. In addition, to the extent
necessary and desirable to comply with the Applicable Laws, the Company shall
obtain stockholder approval of any Plan amendment in such a manner and to such
as degree as required.

          (b) EFFECT OF AMENDMENT OR TERMINATION.  No amendment or termination
              ----------------------------------                              
of the Plan shall materially and adversely affect Options or Stock Purchase
Rights already granted, unless mutually agreed otherwise between the Optionee or
holder of the Stock Purchase Rights and the Administrator, which agreement must
be in writing and signed by such Optionee or holder and the Company.

                                      -16-

 
     17.  CONDITIONS UPON ISSUANCE OF SHARES.  Notwithstanding any other
          ----------------------------------                            
provision of the Plan or any agreement entered into by the Company pursuant to
the Plan, the Company shall not be obligated, and shall have no liability for
failure, to issue or deliver any Shares under the Plan unless such issuance or
delivery would comply with the Applicable Laws, with such compliance determined
by the Company in consultation with its legal counsel.

     As a condition to the exercise of an Option or Stock Purchase Right, the
Company may require the person exercising such Option or Stock Purchase Right to
represent and warrant at the time of any such exercise that the Shares are being
purchased only for investment and without any present intention to sell or
distribute such Shares if, in the opinion of counsel for the Company, such a
representation is required by law.

     18.  RESERVATION OF SHARES.  The Company, during the term of this Plan,
          ---------------------                                             
will at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

     19.  AGREEMENTS.  Options and Stock Purchase Rights shall be evidenced by
          ----------                                                          
Option Agreements and Restricted Stock Purchase Agreements, respectively, in
such form(s) as the Administrator shall from time to time approve.

     20.  STOCKHOLDER APPROVAL.  If required by the Applicable Laws, continuance
          --------------------                                                  
of the Plan shall be subject to approval by the stockholders of the Company
within twelve (12) months before or after the date the Plan is adopted. Such
stockholder approval shall be obtained in the manner and to the degree required
under the Applicable Laws.

     21.  INFORMATION AND DOCUMENTS TO OPTIONEES AND PURCHASERS.  Prior to the
          -----------------------------------------------------               
date, if any, upon which the Common Stock becomes a Listed Security and if
required by the Applicable Laws, the Company shall provide financial statements
at least annually to each Optionee and to each individual who acquired Shares
pursuant to the Plan, during the period such Optionee or purchaser has one or
more Options or Stock Purchase Rights outstanding, and in the case of an
individual who acquired Shares pursuant to the Plan, during the period such
individual owns such Shares. The Company shall not be required to provide such
information if the issuance of Options or Stock Purchase Rights under the Plan
is limited to key employees whose duties in connection with the Company assure
their access to equivalent information.

                                      -17-

 

                         LATITUDE COMMUNICATIONS, INC.

                                1999 STOCK PLAN

                          NOTICE OF STOCK OPTION GRANT
                          ----------------------------



Optionee's Name and Address:

((Optionee))-
((OptioneeAddress1))
((OptioneeAddress2))

     You have been granted an option to purchase Common Stock of Latitude
Communications, Inc., (the "Company") as follows:

     Board Approval Date:               _________________________

     Date of Grant (Later of Board
          Approval Date or
          Commencement of
          Employment/Consulting):       ((GrantDate))

     Exercise Price Per Share:          ((ExercisePrice))

     Total Number of Shares Granted:    ((SharesGranted))

     Total Price of Shares Granted:     ((TotalExercisePrice))

     Type of Option:                    ((NoSharesISO)) Shares Incentive Stock
                                        Option
                                        ((NoSharesNSO)) Shares Nonstatutory
                                        Stock Option

     Term/Expiration Date:              ((Term))/((ExpirDate))

     Vesting Commencement Date:         ((VestingStartDate))

     Vesting Schedule:                  ((VestingSchedule))

     Termination Period:                Option may be exercised for a period of
                                        ninety (90) days after termination of
                                        employment or consulting relationship
                                        except as set out in Sections 7 and 8 of
                                        the Stock Option Agreement (but in no
                                        event later than the Expiration Date).

 
     By your signature and the signature of the Company's representative below,
you and the Company agree that this option is granted under and governed by the
terms and conditions of the Latitude Communications, Inc. 1999 Stock Plan and
the Stock Option Agreement, all of which are attached and made a part of this
document.

OPTIONEE:                          LATITUDE COMMUNICATIONS, INC.



______________________________     By:______________________________
Signature

______________________________     Title:___________________________
Print Name

 
                         LATITUDE COMMUNICATIONS, INC.

                            STOCK OPTION AGREEMENT
                            ----------------------

     1.   GRANT OF OPTION.  Latitude Communications, Inc., a Delaware
          ---------------
corporation (the "Company"), hereby grants to the Optionee named in the Notice
                  -------
of Stock Option Grant attached to this Agreement ("Optionee"), an option (the
                                                   --------
"Option") to purchase the total number of shares of Common Stock (the "Shares")
 ------                                                                ------
set forth in the Notice of Stock Option Grant, at the exercise price per share
set forth in the Notice of Stock Option Grant (the "Exercise Price") subject to
the terms, definitions and provisions of the 1999 Stock Plan (the "Plan")
                                                                   ----
adopted by the Company, which is incorporated in this Agreement by reference. In
the event of a conflict between the terms of the Plan and the terms of this
Agreement, the terms of the Plan shall govern. Unless otherwise defined in this
Agreement, the terms used in this Agreement shall have the meanings defined in
the Plan.

          To the extent designated an Incentive Stock Option in the Notice of
Stock Option Grant, this Option is intended to qualify as an Incentive Stock
Option as defined in Section 422 of the Internal Revenue Code of 1986, as
amended (the "Code") and, to the extent not so designated, this Option is
              ----                                                       
intended to be a Nonstatutory Stock Option.

     2.   EXERCISE OF OPTION.  This Option shall be exercisable during its term
          ------------------                                                   
in accordance with the Vesting Schedule set out in the Notice of Stock Option
Grant and with the provisions of Sections 9 and 10 of the Plan as follows:

          (a)  RIGHT TO EXERCISE.
               ----------------- 

               (i)   This Option may not be exercised for a fraction of a share.

               (ii)  In the event of Optionee's death, disability or other
termination of employment, the exercisability of the Option is governed by
Sections 6, 7 and 8 below, subject to the limitations contained in paragraphs
(iii) and (iv) below.

               (iii) In no event may this Option be exercised after the date of
expiration of the term of this Option as set forth in the Notice of Stock Option
Grant.

               (iv)  If designated an Incentive Stock Option in the Notice of
Stock Option Grant, in the event that the Shares subject to this Option (and all
other Incentive Stock Options granted to Optionee by the Company or any Parent
or Subsidiary) that vest in any calendar year have an aggregate fair market
value (determined for each Share as of the Date of Grant of the option covering
such Share) in excess of $100,000, the Shares in excess of $100,000 shall be
treated as subject to a Nonstatutory Stock Option, in accordance with Section 5
of the Plan.

 
          (b)  METHOD OF EXERCISE.
               ------------------ 

               (i)   This Option shall be exercisable by delivering to the
Company a written notice of exercise (in the form attached as Exhibit A) which
                                                              ---------
shall state the election to exercise the Option, the number of Shares in respect
of which the Option is being exercised, and such other representations and
agreements as to the holder's investment intent with respect to such Shares of
Common Stock as may be required by the Company pursuant to the provisions of the
Plan. Such written notice shall be signed by Optionee and shall be delivered in
person or by certified mail to the Secretary of the Company. The written notice
shall be accompanied by payment of the Exercise Price. This Option shall be
deemed to be exercised upon receipt by the Company of such written notice
accompanied by the Exercise Price.

               (ii)  As a condition to the exercise of this Option, Optionee
agrees to make adequate provision for federal, state or other tax withholding
obligations, if any, which arise upon the exercise of the Option or disposition
of Shares, whether by withholding, direct payment to the Company, or otherwise.

               (iii) No Shares will be issued pursuant to the exercise of an
Option unless such issuance and such exercise shall comply with all relevant
provisions of law and the requirements of any stock exchange upon which the
Shares may then be listed. Assuming such compliance, for income tax purposes the
Shares shall be considered transferred to Optionee on the date on which the
Option is exercised with respect to such Shares.

     3.   OPTIONEE'S REPRESENTATIONS.  In the event the Shares purchasable
          --------------------------                                      
pursuant to the exercise of this Option have not been registered under the
Securities Act of 1933, as amended (the "Securities Act"), at the time this
                                         --------------                    
Option is exercised, Optionee shall, if required by the Company, concurrently
with the exercise of all or any portion of this Option, deliver to the Company
an investment representation statement in customary form, a copy of which is
available for Optionee's review from the Company upon request.

     4.   METHOD OF PAYMENT.  Payment of the Exercise Price shall be by any of
          -----------------                                                   
the following, or a combination of the following, at the election of Optionee:
(a) cash; (b) check; (c) surrender of other Shares of Common Stock of the
Company that (i) either have been owned by Optionee for more than six (6) months
on the date of surrender or were not acquired, directly or indirectly, from the
Company, and (ii) have a Fair Market Value on the date of surrender equal to the
aggregate exercise price of the Shares as to which said Option shall be
exercised; (d) authorization from the Company to retain from the total number of
Shares as to which the Option is exercised that number of Shares having a Fair
Market value on the date of exercise equal to the exercise price for the total
number of Shares as to which the Option is exercised; or (e) if there is a
public market for the Shares and they are registered under the Securities Act,
delivery of a properly executed exercise notice together with irrevocable
instructions to a broker to deliver promptly to the Company the amount of sale
or loan proceeds required to pay the exercise price.

     5.   RESTRICTIONS ON EXERCISE.  This Option may not be exercised until such
          ------------------------                                              
time as the Plan has been approved by the stockholders of the Company, or if the
issuance of such Shares 

                                      -2-

 
upon such exercise or the method of payment of consideration for such shares
would constitute a violation of any applicable federal or state securities or
other law or regulation, including any rule under Part 207 of Title 12 of the
Code of Federal Regulations ("Regulation G") as promulgated by the Federal
                              ------------
Reserve Board. As a condition to the exercise of this Option, the Company may
require Optionee to make any representation and warranty to the Company as may
be required by any applicable law or regulation.

     6.   TERMINATION OF RELATIONSHIP.  In the event of termination of
          ---------------------------
Optionee's Continuous Status as an Employee or Consultant, Optionee may, to the
extent otherwise so entitled at the date of such termination (the "Termination
                                                                   -----------
Date"), exercise this Option during the Termination Period set out in the Notice
- ----
of Stock Option Grant. To the extent that Optionee was not entitled to exercise
this Option at the date of such termination, or if Optionee does not exercise
this Option within the time specified in the Notice of Stock Option Grant, the
Option shall terminate.

     7.   DISABILITY OF OPTIONEE.  Notwithstanding the provisions of Section 6
          ----------------------                                              
above, in the event of termination of Optionee's Continuous Status as an
Employee or Consultant as a result of total and permanent disability (as defined
in Section 22(e)(3) of the Code), Optionee may, but only within twelve (12)
months from the date of termination of employment (but in no event later than
the date of expiration of the term of this Option as set forth in Section 10
below), exercise the Option to the extent otherwise so entitled at the date of
such termination.  To the extent that Optionee was not entitled to exercise the
Option at the date of termination, or if Optionee does not exercise such Option
(to the extent otherwise so entitled) within the time specified in this
Agreement, the Option shall terminate.

     8.   DEATH OF OPTIONEE.  In the event of the death of Optionee:
          -----------------                                         

          (a)  during the term of this Option and while an Employee of the
Company and having been in Continuous Status as an Employee or Consultant since
the date of grant of the Option, the Option may be exercised, at any time within
twelve (12) months following the date of death (but in no event later than the
date of expiration of the term of this Option as set forth in Section 10 below),
by Optionee's estate or by a person who acquired the right to exercise the
Option by bequest or inheritance, but only to the extent of the right to
exercise that would have accrued at the date of death; or

          (b)  within thirty (30) days after the termination of Optionee's
Continuous Status as an Employee or Consultant, the Option may be exercised, at
any time within twelve (12) months following the date of death (but in no event
later than the date of expiration of the term of this Option as set forth in
Section 10 below), by Optionee's estate or by a person who acquired the right to
exercise the Option by bequest or inheritance, but only to the extent of the
right to exercise that had accrued at the date of termination.

     9.   NON-TRANSFERABILITY OF OPTION.  This Option may not be transferred in
          -----------------------------                                        
any manner otherwise than by will or by the laws of descent or distribution.
The designation of a beneficiary does not constitute a transfer.  An Option may
be exercised during the lifetime of 

                                      -3-

 
Optionee only by Optionee or a transferee permitted by this section. The terms
of this Option shall be binding upon the executors, administrators, heirs,
successors and assigns of Optionee.

     10.  TERM OF OPTION.  This Option may be exercised only within the term set
          --------------                                                        
out in the Notice of Stock Option Grant, and may be exercised during such term
only in accordance with the Plan and the terms of this Option.

     11.  NO ADDITIONAL EMPLOYMENT RIGHTS.  Optionee understands and agrees that
          -------------------------------                                       
the vesting of Shares pursuant to the Vesting Schedule is earned only by
continuing as an Employee or Consultant at the will of the Company (not through
the act of being hired, being granted this Option or acquiring Shares under this
Agreement).  Optionee further acknowledges and agrees that nothing in this
Agreement, nor in the Plan which is incorporated in this Agreement by reference,
shall confer upon Optionee any right with respect to continuation as an Employee
or Consultant with the Company, nor shall it interfere in any way with his or
her right or the Company's right to terminate his or her employment or
consulting relationship at any time, with or without cause.

     12.  TAX CONSEQUENCES.  Optionee acknowledges that he or she has read the
          ----------------                                                    
brief summary set forth below of certain federal tax consequences of exercise of
this Option and disposition of the Shares under the law in effect as of the date
of grant.  OPTIONEE UNDERSTANDS THAT THIS SUMMARY IS NECESSARILY INCOMPLETE, AND
THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.  OPTIONEE SHOULD CONSULT HIS
OR HER OWN TAX ADVISER BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

          (a)  EXERCISE OF INCENTIVE STOCK OPTION.  If this Option is an
               ----------------------------------                       
Incentive Stock Option, there will be no regular federal income tax liability
upon the exercise of the Option, although the excess, if any, of the fair market
value of the Shares on the date of exercise over the Exercise Price will be
treated as an item of alternative minimum taxable income for federal tax
purposes and may subject Optionee to the alternative minimum tax in the year of
exercise.

          (b)  EXERCISE OF NONSTATUTORY STOCK OPTION.  If this Option does not
               -------------------------------------                          
qualify as an Incentive Stock Option, Optionee may incur regular federal income
tax liability upon the exercise of the Option.  Optionee will be treated as
having received compensation income (taxable at ordinary income tax rates) equal
to the excess, if any, of the fair market value of the Shares on the date of
exercise over the Exercise Price.  In addition, if Optionee is an employee of
the Company, the Company will be required to withhold from Optionee's
compensation or collect from Optionee and pay to the applicable taxing
authorities an amount equal to a percentage of this compensation income at the
time of exercise.

          (c)  DISPOSITION OF SHARES.  If this Option is an Incentive Stock
               ---------------------                                       
Option and if Shares transferred pursuant to the Option are held for more than
one year after exercise and more than two years after the Date of Grant, any
gain realized on disposition of the Shares will be treated as long-term capital
gain for federal income tax purposes.  If Shares purchased under an Incentive
Stock Option are disposed of before the end of either of such two holding
periods, then any gain realized on such disposition will be treated as
compensation income (taxable at ordinary 

                                      -4-

 
income rates) to the extent of the excess, if any, of the lesser of (i) the fair
market value of the Shares on the date of exercise, or (ii) the sales proceeds,
over the Exercise Price. If this Option is a Nonstatutory Stock Option, then
gain realized on the disposition of Shares will be treated as long-term or 
short-term capital gain depending on whether or not the disposition occurs more
than one year after the exercise date. The tax rate on long-term capital gains
under current federal tax laws is capped at 20% for shares held more than one
year.

          (d)  NOTICE OF DISQUALIFYING DISPOSITION.  If the Option granted to
               -----------------------------------                           
Optionee in this Agreement is an Incentive Stock Option, and if Optionee sells
or otherwise disposes of any of the Shares acquired pursuant to the Incentive
Stock Option on or before the later of (i) the date two years after the Date of
Grant, or (ii) the date one year after transfer of such Shares to Optionee upon
exercise of the Incentive Stock Option, Optionee shall notify the Company in
writing within thirty (30) days after the date of any such disposition.
Optionee agrees that Optionee may be subject to income tax withholding by the
Company on the compensation income recognized by Optionee from the early
disposition by payment in cash or out of the current earnings paid to Optionee.

     13.  SIGNATURE.  This Stock Option Agreement shall be deemed executed by
          ---------                                                          
the Company and Optionee upon execution by such parties of the Notice of Stock
Option Grant attached to this Stock Option Agreement.

                 [Remainder of page left intentionally blank]

                                      -5-

 
                                   EXHIBIT A
                                   ---------
                                        
                              NOTICE OF EXERCISE
                              ------------------

To:       Latitude Communications, Inc.
Attn:     Stock Option Administrator
Subject:  Notice of Intention to Exercise Stock Option
          --------------------------------------------

     This is official notice that the undersigned ("Optionee") intends to
                                                    --------             
exercise Optionee's option to purchase __________ shares of Latitude
Communications, Inc. Common Stock, under and pursuant to the Company's 1999
Stock Plan and the Stock Option Agreement dated ___________, as follows:

          Grant Number:       ________________________________

          Date of Purchase:   ________________________________

          Number of Shares:   ________________________________

          Purchase Price:     ________________________________

          Method of Payment
          of Purchase Price:  ________________________________


     Social Security No.:  ________________________________

     The shares should be issued as follows:

          Name:     __________________________

          Address:  __________________________

                    __________________________

                    __________________________

          Signed:   __________________________

          Date:     __________________________

 
                         LATITUDE COMMUNICATIONS, INC.

                      RESTRICTED STOCK PURCHASE AGREEMENT
                      -----------------------------------

                                1999 STOCK PLAN
                                ---------------

     This Restricted Stock Purchase Agreement (the "Agreement") is made as of
                                                    ---------                
__________________, ______, by and between Latitude Communications, Inc., a
Delaware corporation (the "Company"), and ____________________ ("Purchaser")
                           -------                               ---------  
pursuant to the Company's 1999 Stock Plan.

     1.   Sale of Stock.  Subject to the terms and conditions of this Agreement,
          -------------                                                         
on the Purchase Date (as defined below) the Company will issue and sell to
Purchaser, and Purchaser agrees to purchase from the Company, _______________
shares of the Company's Common Stock (the "Shares") at a purchase price of
                                           ------                         
$_____ per Share for a total purchase price of $_________________.  The term
"Shares" refers to the purchased Shares and all securities received in
replacement of or in connection with the Shares pursuant to stock dividends or
splits, all securities received in replacement of the Shares in a
recapitalization, merger, reorganization, exchange or the like, and all new,
substituted or additional securities or other properties to which Purchaser is
entitled by reason of Purchaser's ownership of the Shares.

     2.   Purchase.  The purchase and sale of the Shares under this Agreement
          --------                                                           
shall occur at the principal office of the Company simultaneously with the
execution of this Agreement by the parties or on such other date as the Company
and Purchaser shall agree (the "Purchase Date").  On the Purchase Date, the
                                -------------                              
Company will deliver to Purchaser a certificate representing the Shares to be
purchased by Purchaser (which shall be issued in Purchaser's name) against
payment of the purchase price therefor by Purchaser by check made payable to the
Company.

     3.   Limitations on Transfer.  In addition to any other limitation on
          -----------------------                                         
transfer created by applicable securities laws, Purchaser shall not assign,
encumber or dispose of any interest in the Shares while the Shares are subject
to the Company's Repurchase Option (as defined below).  After any Shares have
been released from the Repurchase Option, Purchaser shall not assign, encumber
or dispose of any interest in such Shares except in compliance with the
provisions below and applicable securities laws.

          (a)  Repurchase Option.
               ----------------- 

               (i)   In the event of the voluntary or involuntary termination of
Purchaser's employment or consulting relationship with the Company for any
reason (including death or disability), with or without cause, the Company shall
upon the date of such termination (the "Termination Date") have an irrevocable,
                                        ----------------                       
exclusive option (the "Repurchase Option") for a period of 60 days from such
                       -----------------                                    
date to repurchase all or any portion of the Shares held by Purchaser as of the
Termination Date which have not yet been released from the Company's Repurchase
Option at the original purchase price per Share specified in Section 1 (adjusted
for any stock splits, stock dividends and the like).

 
               (ii)  The Repurchase Option shall be exercised by the Company by
written notice to Purchaser or Purchaser's executor and, at the Company's
option, (A) by delivery to Purchaser or Purchaser's executor with such notice of
a check in the amount of the purchase price for the Shares being purchased, or
(B) in the event Purchaser is indebted to the Company, by cancellation by the
Company of an amount of such indebtedness equal to the purchase price for the
Shares being repurchased, or (C) by a combination of (A) and (B) so that the
combined payment and cancellation of indebtedness equals such purchase price.
Upon delivery of such notice and payment of the purchase price in any of the
ways described above, the Company shall become the legal and beneficial owner of
the Shares being repurchased and all rights and interest therein or related
thereto, and the Company shall have the right to transfer to its own name the
number of Shares being repurchased by the Company, without further action by
Purchaser.

               (iii) One hundred percent (100%) of the Shares shall be subject
to the Repurchase Option upon grant. Thereafter, the Shares held by Purchaser
shall be released from the Repurchase Option under this Section 3(a) as follows
(provided in each case that Purchaser's employment has not been terminated prior
to the date of any such release): __ of the total number of Shares shall be
released from the Repurchase Option on the __-month anniversary of the Vesting
Commencement Date (as set forth on the signature page of this Agreement), and an
additional __ of the total number of Shares shall be released from the
Repurchase Option each month thereafter on the Monthly Vesting Date (as set
forth on the signature page of this Agreement), until all Shares are released
from the Repurchase Option. Fractional shares shall be rounded to the nearest
whole share.

          (b) Restrictions Binding on Transferees.  All transferees of Shares or
              -----------------------------------                               
any interest therein will receive and hold such Shares or interest subject to
the provisions of this Agreement, including insofar as applicable the Company's
Repurchase Option.  Any sale or transfer of the Shares shall be void unless the
provisions of this Agreement are satisfied.

          (c) Termination of Rights.  Upon the expiration or exercise of the
              ---------------------                                         
Repurchase Option, a new certificate or certificates representing the Shares not
repurchased shall be issued, on request, without the legend referred to in
Section 5(a) below and delivered to Purchaser.

     4.   Escrow of Unvested Shares.  For purposes of facilitating the
          -------------------------                                   
enforcement of the provisions of Section 3 above, Purchaser agrees, immediately
upon receipt of the certificate(s) for the Shares subject to the Repurchase
Option, to deliver such certificate(s), together with an Assignment Separate
from Certificate in the form attached to this Agreement as Exhibit A executed by
                                                           ---------            
Purchaser and by Purchaser's spouse (if required for transfer), in blank, to the
Secretary of the Company, or the Secretary's designee, to hold such
certificate(s) and Assignment Separate from Certificate in escrow and to take
all such actions and to effectuate all such transfers and/or releases as are in
accordance with the terms of this Agreement.  Purchaser hereby acknowledges that
the Secretary of the Company, or the Secretary's designee, is so appointed as
the escrow holder with the foregoing authorities as a material inducement to
make this Agreement and that said appointment is coupled with an interest and is
accordingly 

                                      -2-

 
irrevocable.  Purchaser agrees that said escrow holder shall not be
liable to any party hereof (or to any other party).  The escrow holder may rely
upon any letter, notice or other document executed by any signature purported to
be genuine and may resign at any time.  Purchaser agrees that if the Secretary
of the Company, or the Secretary's designee, resigns as escrow holder for any or
no reason, the Board of Directors of the Company shall have the power to appoint
a successor to serve as escrow holder pursuant to the terms of this Agreement.

     5.   Restrictive Legends and Stop-Transfer Orders.
          -------------------------------------------- 

          (a) Legends.  The certificate or certificates representing the Shares
              -------                                                          
shall bear the following legend (as well as any legends required by applicable
state and federal corporate and securities laws):

                    THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE
                    TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN
                    AGREEMENT BETWEEN THE COMPANY AND THE SHAREHOLDER, A COPY OF
                    WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY.

          (b) Stop-Transfer Notices.  Purchaser agrees that, in order to ensure
              ---------------------                                            
compliance with the restrictions referred to herein, the Company may issue
appropriate "stop transfer" instructions to its transfer agent, if any, and
that, if the Company transfers its own securities, it may make appropriate
notations to the same effect in its own records.

          (c) Refusal to Transfer.  The Company shall not be required (i) to
              -------------------                                           
transfer on its books any Shares that have been sold or otherwise transferred in
violation of any of the provisions of this Agreement or (ii) to treat as owner
of such Shares or to accord the right to vote or pay dividends to any purchaser
or other transferee to whom such Shares shall have been so transferred.

     6.   No Employment Rights.  Nothing in this Agreement shall affect in any
          --------------------                                                
manner whatsoever the right or power of the Company, or a parent or subsidiary
of the Company, to terminate Purchaser's employment or consulting relationship,
for any reason, with or without cause.

     7.   Section 83(b) Election.  Purchaser understands that Section 83(a) of
          ----------------------                                              
the Internal Revenue Code of 1986, as amended (the "Code"), taxes as ordinary
                                                    ----                     
income the difference between the amount paid for the Shares and the fair market
value of the Shares as of the date any restrictions on the Shares lapse.  In
this context, "restriction" means the right of the Company to buy back the
               -----------                                                
Shares pursuant to the Repurchase Option set forth in Section 3(a) of this
Agreement.  Purchaser understands that Purchaser may elect to be taxed at the
time the Shares are purchased, rather than when and as the Repurchase Option
expires, by filing an election under Section 83(b) (an "83(b) Election") of the
                                                        --------------         
Code with the Internal Revenue Service within 30 days from the date of purchase.
                                              -------                         
Even if the fair market value of the Shares at the time of the execution of this
Agreement equals the amount paid for the Shares, the election must be made to

                                      -3-

 
avoid income under Section 83(a) in the future.  Purchaser understands that
failure to file such an election in a timely manner may result in adverse tax
consequences for Purchaser.  Purchaser further understands that an additional
copy of such election form should be filed with his or her federal income tax
return for the calendar year in which the date of this Agreement falls.
Purchaser acknowledges that the foregoing is only a summary of the effect of
United States federal income taxation with respect to purchase of the Shares
hereunder, and does not purport to be complete.  Purchaser further acknowledges
that the Company has directed Purchaser to seek independent advice regarding the
applicable provisions of the Code, the income tax laws of any municipality,
state or foreign country in which Purchaser may reside, the tax consequences of
Purchaser's death and the decision as to whether or not to file an 83(b)
Election in connection with the acquisition of the Shares.

     Purchaser agrees that he will execute and deliver to the Company with this
executed Agreement a copy of the Acknowledgment and Statement of Decision
Regarding Section 83(b) Election (the "Acknowledgment"), attached hereto as
                                       --------------                      
Exhibit B.  Purchaser further agrees that Purchaser will execute and submit with
- ---------                                                                       
the Acknowledgment a copy of the 83(b) Election, attached hereto as Exhibit C,
                                                                    --------- 
if Purchaser has indicated in the Acknowledgment his or her decision to make
such an election.

     8.   Miscellaneous.
          ------------- 

          (a) Governing Law.  This Agreement and all acts and transactions
              -------------                                               
pursuant hereto and the rights and obligations of the parties hereto shall be
governed, construed and interpreted in accordance with the laws of the State of
Delaware, without giving effect to principles of conflicts of law.

          (b) Entire Agreement; Enforcement of Rights.  This Agreement sets
              ---------------------------------------                      
forth the entire agreement and understanding of the parties relating to the
subject matter herein and merges all prior discussions between them.  No
modification of or amendment to this Agreement, nor any waiver of any rights
under this Agreement, shall be effective unless in writing signed by the parties
to this Agreement.  The failure by either party to enforce any rights under this
Agreement shall not be construed as a waiver of any rights of such party.

          (c) Severability.  If one or more provisions of this Agreement are
              ------------                                                  
held to be unenforceable under applicable law, the parties agree to renegotiate
such provision in good faith.  In the event that the parties cannot reach a
mutually agreeable and enforceable replacement for such provision, then (i) such
provision shall be excluded from this Agreement, (ii) the balance of this
Agreement shall be interpreted as if such provision were so excluded and (iii)
the balance of this Agreement shall be enforceable in accordance with its terms.

          (d) Construction.  This Agreement is the result of negotiations
              ------------                                               
between and has been reviewed by each of the parties hereto and their respective
counsel, if any; accordingly, this Agreement shall be deemed to be the product
of all of the parties hereto, and no ambiguity shall be construed in favor of or
against any one of the parties hereto.

                                      -4-

 
          (e) Notices.  Any notice required or permitted by this Agreement shall
              -------                                                           
be in writing and shall be deemed sufficient when delivered personally or sent
by telegram or fax or 48 hours after being deposited in the U.S. mail, as
certified or registered mail, with postage prepaid, and addressed to the party
to be notified at such party's address or fax number as set forth below or as
subsequently modified by written notice.

          (f) Counterparts.  This Agreement may be executed in two or more
              ------------                                                
counterparts, each of which shall be deemed an original and all of which
together shall constitute one instrument.

          (g) Successors and Assigns.  The rights and benefits of this Agreement
              ----------------------                                            
shall inure to the benefit of, and be enforceable by the Company's successors
and assigns.  The rights and obligations of Purchaser under this Agreement may
only be assigned with the prior written consent of the Company.


                            [Signature Page Follows]

                                      -5-

 
     The parties have executed this Agreement as of the date first set forth
above.

                                     LATITUDE COMMUNICATIONS, INC.

                                     BY:_______________________________

                                     TITLE:____________________________

                                     ADDRESS:
                                     __________________________________
                                     __________________________________
 

     PURCHASER ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO
SECTION 3 HEREOF IS EARNED ONLY BY CONTINUING SERVICE AS AN EMPLOYEE OR
CONSULTANT AT THE WILL OF THE COMPANY.  PURCHASER FURTHER ACKNOWLEDGES AND
AGREES THAT NOTHING IN THIS AGREEMENT SHALL CONFER UPON PURCHASER ANY RIGHT WITH
RESPECT TO CONTINUATION OF SUCH EMPLOYMENT OR CONSULTING RELATIONSHIP WITH THE
COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH PURCHASER'S RIGHT OR THE
COMPANY'S RIGHT TO TERMINATE PURCHASER'S EMPLOYMENT OR CONSULTING RELATIONSHIP
AT ANY TIME, WITH OR WITHOUT CAUSE.

                                     PURCHASER:

                                     [PURCHASER NAME]

 
                                     __________________________________
                                     (SIGNATURE)

                                     ADDRESS:
                                     __________________________________
                                     __________________________________ 

Vesting Commencement
Date: ____________________

I, ________________________________, spouse of [Purchaser], have read and hereby
approve the foregoing Agreement.  In consideration of the Company's granting my
spouse the right to purchase the Shares as set forth in the Agreement, I hereby
agree to be irrevocably bound by the Agreement and further agree that any
community property or similar interest that I may have in the Shares shall be
similarly bound by the Agreement.  I hereby appoint my spouse as my attorney-in-
fact with respect to any amendment or exercise of any rights under the
Agreement.

 
                                     _______________________________
                                     Spouse of [Purchaser]

                                      -6-

 
                                   EXHIBIT A
                                   ---------

                     ASSIGNMENT SEPARATE FROM CERTIFICATE
                     ------------------------------------

     FOR VALUE RECEIVED and pursuant to that certain Restricted Stock Purchase
Agreement between the undersigned ("Purchaser") and Latitude Communications,
                                    ---------                               
Inc. (the "Company") dated _______________ (the "Agreement"), Purchaser hereby
           -------                               ---------                    
sells, assigns and transfers unto the Company _________________________________
(________) shares of the Common Stock of the Company standing in Purchaser's
name on the Company's books and represented by Certificate No. _____,  and does
hereby irrevocably constitute and appoint ______________________ to transfer
said stock on the books of the Company with full power of substitution in the
premises.  THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND
THE EXHIBITS THERETO.

Dated: ______________________

                                     Signature:


                                     _____________________________________
                                     [Purchaser]


                                     _____________________________________
                                     Spouse of [Purchaser] (if applicable)

Instruction:  Please do not fill in any blanks other than the signature line.
The purpose of this assignment is to enable the Company to exercise its
repurchase option set forth in the Agreement without requiring additional
signatures on the part of Purchaser.

 
                                   EXHIBIT B
                                   ---------

                   ACKNOWLEDGMENT AND STATEMENT OF DECISION
                   -----------------------------------------
                       REGARDING SECTION 83(b) ELECTION
                       --------------------------------
                                        
     The undersigned has entered a stock purchase agreement with Latitude
Communications, Inc., a Delaware corporation (the "Company"), pursuant to which
                                                   -------                     
the undersigned is purchasing ______________ shares of Common Stock of the
Company (the "Shares").  In connection with the purchase of the Shares, the
              ------                                                       
undersigned hereby represents as follows:

     1.  The undersigned has carefully reviewed the stock purchase agreement
pursuant to which the undersigned is purchasing the Shares.

     2.  The undersigned either [check and complete as applicable]:

     (a) ____ has consulted, and has been fully advised by, the undersigned's
          own tax advisor, __________________________, whose business address is
          _____________________________, regarding the federal, state and local
          tax consequences of purchasing the Shares, and particularly regarding
          the advisability of making elections pursuant to Section 83(b) of the
          Internal Revenue Code of 1986, as amended (the "Code") and pursuant to
                                                          ----                  
          the corresponding provisions, if any, of applicable state law; or

     (b) ____ has knowingly chosen not to consult such a tax advisor.

     3.  The undersigned hereby states that the undersigned has decided [check
as applicable]:

     (a) ____ to make an election pursuant to Section 83(b) of the Code, and is
          submitting to the Company, together with the undersigned's executed
          Restricted Stock Purchase Agreement, an executed form entitled
          "Election Under Section 83(b) of the Internal Revenue Code of 1986";
          or

     (b) ____ not to make an election pursuant to Section 83(b) of the Code.

 
     4.  Neither the Company nor any subsidiary or representative of the Company
has made any warranty or representation to the undersigned with respect to the
tax consequences of the undersigned's purchase of the Shares or of the making or
failure to make an election pursuant to Section 83(b) of the Code or the
corresponding provisions, if any, of applicable state law.


Date:___________________                      ___________________________
                                              [Purchaser]


Date:___________________                      ___________________________
                                              Spouse of [Purchaser]

                                      -2-

 
                                   EXHIBIT C
                                   ---------
                         ELECTION UNDER SECTION 83(b)
                         ----------------------------
                     OF THE INTERNAL REVENUE CODE OF 1986
                     ------------------------------------

     The undersigned taxpayer hereby elects, pursuant to Section 83(b) of the
Internal Revenue Code, to include in taxpayer's gross income for the current
taxable year, the amount of any compensation taxable to taxpayer in connection
with taxpayer's receipt of the property described below:

1.   The name, address, taxpayer identification number and taxable year of the
     undersigned are as follows:

     NAME OF TAXPAYER:  [Purchaser]

     NAME OF SPOUSE:

     ADDRESS:_______________________
              
             _______________________
 
     IDENTIFICATION NO. OF TAXPAYER:

     IDENTIFICATION NO. OF SPOUSE:

     TAXABLE YEAR:

2.   The property with respect to which the election is made is described as
     follows:

     ______________ shares of the Common Stock $_______ par value, of Latitude
     Communications, Inc., a Delaware corporation (the "Company").

3.   The date on which the property was transferred is:  __________________

4.   The property is subject to the following restrictions:

     Repurchase option at cost in favor of the Company upon termination of
     taxpayer's employment or consulting relationship.

5.   The fair market value at the time of transfer, determined without regard to
     any restriction other than a restriction which by its terms will never
     lapse, of such property is:  $_____________.

6.   The amount (if any) paid for such property:  $______________

The undersigned has submitted a copy of this statement to the person for whom
the services were performed in connection with the undersigned's receipt of the
above-described property.  The transferee of such property is the person
performing the services in connection with the transfer of said property.

The undersigned understands that the foregoing election may not be revoked
- --------------------------------------------------------------------------
except with the consent of the Commissioner.
- ------------------------------------------- 

Dated: ______________________       ______________________________________
                                    Taxpayer
Dated: ______________________       ______________________________________
                                    Spouse of Taxpayer

 
                                    RECEIPT
                                    -------

          Latitude Communications, Inc. hereby acknowledges receipt of a check
in the amount of $__________ given by [Purchaser] as consideration for
Certificate No. ___________ for ____________ shares of Common Stock of Latitude
Communications, Inc..


Dated:  ________________

                              Latitude Communications, Inc.

                              By:_________________________________

                              Title:______________________________

 
                              RECEIPT AND CONSENT
                              -------------------

     The undersigned hereby acknowledges receipt of a photocopy of Certificate
No. ______ for _____________ shares of Common Stock of Latitude Communications,
Inc. (the "Company").
           -------   

     The undersigned further acknowledges that the Secretary of the Company, or
his or her designee, is acting as escrow holder pursuant to the Restricted Stock
Purchase Agreement Purchaser has previously entered into with the Company.  As
escrow holder, the Secretary of the Company, or his or her designee, holds the
original of the aforementioned certificate issued in the undersigned's name.

Dated:  _________________________

                                          ________________________________
                                          [Purchaser]