EXHIBIT B

                                                                   EXHIBIT 10.26





                      Cimaron Communications Corporation

                           1998 Stock Incentive Plan
                           -------------------------


1.   Purpose
     -------

     The purpose of this 1998 Stock Incentive Plan (the "Plan") of Cimaron
Communications Corporation, a Delaware corporation (the "Company"), is to
advance the interests of the Company's stockholders by enhancing the Company's
ability to attract, retain and motivate persons who make (or are expected to
make) important contributions to the Company by providing such persons with
equity ownership opportunities and performance-based incentives and thereby
better aligning the interests of such persons with those of the Company's
stockholders. Except where the context otherwise requires, the term "Company"
shall include any present or future subsidiary corporations of Cimaron
Communications Corporation as defined in Section 424(f) of the Internal Revenue
Code of 1986, as amended, and any regulations promulgated thereunder (the
"Code").

2.   Eligibility
     -----------

     All of the Company's employees, officers, directors, consultants and
advisors are eligible to be granted options, restricted stock, or other stock-
based awards (each, an "Award") under the Plan. Any person who has been granted
an Award under the Plan shall be deemed a "Participant".

3.   Administration, Delegation
     --------------------------

     (a)  Administration by Board of Directors. The Plan will be administered
          ------------------------------------
by the Board of Directors of the Company (the "Board"). The Board shall have
authority to grant Awards and to adopt, amend and repeal such administrative
rules, guidelines and practices relating to the Plan as it shall deem advisable.
The Board may correct any defect, supply any omission or reconcile any
inconsistency in the Plan or any Award in the manner and to the extent it shall
deem expedient to carry the Plan into effect and it shall be the sole and final
judge of such expediency. All decisions by the Board shall be made in the
Board's sole discretion and shall be final and binding on all persons having or
claiming any interest in the Plan or in any Award. No director or person acting
pursuant to the authority delegated by the Board shall be liable for any action
or determination relating to or under the Plan made in good faith.

                                       1


     (b)  Delegation to Executive Officers. To the extent permitted by
          --------------------------------
applicable law, the Board may delegate to one or more executive officers of the
Company the power to make Awards and exercise such other powers under the Plan
as the Board may determine, provided that the Board shall fix the maximum number
of shares subject to Awards and the maximum number of shares for any one
Participant to be made by such executive officers.

     (c)  Appointment of Committees. To the extent permitted by applicable law,
          -------------------------
the Board may delegate any or all of its powers under the Plan to one or more
committees or subcommittees of the Board (a "Committee"). If and when the common
stock, $.001 par value per share, of the Company (the "Common Stock") is
registered under the Securities Exchange Act of 1934 (the "Exchange Act"), the
Board shall appoint one such Committee of not less than two members, each member
of which shall be an "outside director" within the meaning of Section 162(m) of
the Code and a "non-employee director" as defined in Rule 16b-3 promulgated
under the Exchange Act." All references in the Plan to the "Board" shall mean
the Board or a Committee of the Board or the executive officer referred to in
Section 3(b) to the extent that the Board's powers or authority under the Plan
have been delegated to such Committee or executive officer.

4.   Stock Available for Awards
     --------------------------

     (a)  Number of Shares. Subject to adjustment under Section 8, Awards may
          ----------------
be made under the Plan for up to 2,556,250 shares of Common Stock. If any Award
expires or is terminated, surrendered or canceled without having been fully
exercised or is forfeited in whole or in part or results in any Common Stock not
being issued, the unused Common Stock covered by such Award shall again be
available for the grant of Awards under the Plan, subject however, in the case
of Incentive Stock Options (as hereinafter defined), to any limitation required
under the Code. Shares issued under the Plan may consist in whole or in part of
authorized but unissued shares or treasury shares.

     (b)  Per-Participant Limit. Subject to adjustment under Section 8, for
          ---------------------
Awards granted after the Common Stock is registered under the Exchange Act, the
maximum number of shares with respect to which an Award may be granted to any
Participant under the Plan shall be 500,000 per calendar year. The per-
participant limit described in this Section 4(b) shall be construed and applied
consistently with Section 162(m) of the Code.

                                       2


5.   Stock Options
     -------------

     (a) General. The Board may grant options to purchase Common Stock (each, an
         -------
"Option") and determine the number of shares of Common Stock to be covered by
each Option, the exercise price of each Option and the conditions and
limitations applicable to the exercise of each Option, including conditions
relating to applicable federal or state securities laws, as it considers
necessary or advisable. An Option which is not intended to be an Incentive Stock
Option (as hereinafter defined) shall be designated a "Nonstatutory Stock
Option".

     (b) Incentive Stock Options. An Option that the Board intends to be an
         -----------------------
incentive stock option" as defined in Section 422 of the Code (an "Incentive
Stock Option") shall only be granted to employees of the Company and shall be
subject to and shall be construed consistently with the requirements of Section
422 of the Code. The Company shall have no liability to a Participant, or any
other party, if an Option (or any part thereto which is intended to be an
Incentive Stock Option is not an Incentive Stock Option.

     (c) Exercise Price. The Board shall establish the exercise price at the
         --------------
time each Option is granted and specify it in the applicable option agreement.

     (d) Duration of Options. Each Option shall be exercisable at such times
         -------------------
and subject to such terms and conditions as the Board may specify in the
applicable option agreement.

     (e) Exercise of Option. Options may be exercised only by delivery to the
         ------------------
Company of a written notice of exercise signed by the proper person together
with payment in full as specified in Section 5(f) for the number of shares for
which the Option is exercised.

     (f) Payment Upon Exercise. Common Stock purchased upon the exercise of an
         ---------------------
Option granted under the Plan shall be paid for as follows:

         (1)  in cash or by check, payable to the order of the Company;

         (2)  except as the Board may otherwise provide in an Option Agreement,
(i) delivery of an irrevocable and unconditional undertaking by a creditworthy
broker to deliver promptly to the Company sufficient funds to pay the exercise
price, (ii) delivery by the Participant to the Company of a copy of irrevocable
and unconditional instructions to a creditworthy broker to deliver promptly to
the Company cash or a check sufficient to pay the exercise price or (iii)
delivery of shares of Common Stock owned by the Participant valued at their fair
market value as

                                       3


determined by the Board in good faith ("Fair Market Value"), which Common Stock
was owned by the Participant at least six months prior to such delivery;

          (3) to the extent permitted by the Board and explicitly provided in an
Option Agreement (i) by delivery of a promissory note of the Participant to the
Company on terms determined by the Board, or (ii) by payment of such other
lawful consideration as the Board may determine; or

          (4) any combination of the above permitted forms of payment.

6.   Restricted Stock
     ----------------

     (a)  Grants. The Board may grant Awards entitling recipients to acquire
          ------
shares of Common Stock, subject to the right of the Company to repurchase all or
part of such shares at their issue price or other stated or formula price (or to
require forfeiture of such shares if issued at no cost) from the recipient in
the event that conditions specified by the Board in the applicable Award are not
satisfied prior to the end of the applicable restriction period or periods
established by the Board for such Award (each, "Restricted Stock Award").

     (b)  Terms and Conditions. The Board shall determine the terms and any such
          --------------------
Restricted Stock Award, including the conditions for repurchase (or forfeiture)
and the issue price, if any. Any stock certificates issued in respect of a
Restricted Stock Award shall be registered in the name of the Participant and,
unless otherwise determined by the Board, deposited by the Participant, together
with a stock power endorsed in blank, with the Company (or its designee). At the
expiration of the applicable restriction periods, the Company (or such designee)
shall deliver the certificates no longer subject to such restrictions to the
Participant or if the Participant has died, to the beneficiary designated, in a
manner determined by the Board, by a Participant to receive amounts due or
exercise rights of the Participant in the event of the Participant's death (the
"Designated Beneficiary"). In the absence of an effective designation by a
Participant, Designated Beneficiary shall mean the Participant's estate.

7.   Other Stock-Based Awards
     ------------------------

     The Board shall have the right to grant other Awards based upon the Common
Stock having such terms and conditions as the Board may determine, including the
grant of shares based upon certain conditions, the grant of securities
convertible into Common Stock and the grant of stock appreciation rights.

                                       4


8.   Changes in Capitalization: Acquisition Events
     ---------------------------------------------

     (a)  Changes in Capitalization. In the event of any stock split, reverse
          -------------------------
stock split, stock dividend, recapitalization, combination of shares,
reclassification of shares, liquidation, spin-off or other similar change in
capitalization or event, or any distribution to holders of Common Stock other
than a normal cash dividend, (i) the number and class of security available
under this Plan, (ii) the number and class of security and exercise price per
share subject to each outstanding Option, (iii) the repurchase price per share
subject to each outstanding Restricted Stock Award, and (iv) the terms of each
other outstanding stock-based Award shall be appropriately adjusted by the
Company (or substituted Awards may be made, if applicable) to the extent the
Board shall determine, in good faith, that such an adjustment (or substitution)
is necessary and appropriate. If this Section 8(a) applies and Section 8(b) also
applies to any event, Section 8(b) shall be applicable to such event, and this
Section 8(a) shall not be applicable.

     (b)  Acquisition Events
          ------------------

          (1)  Consequences of Acquisition Events. Upon the occurrence of an
               ----------------------------------
Acquisition Event (as defined below), or the execution by the Company of any
agreement with respect to an Acquisition Event, the Board shall provide that
outstanding Awards other than Restricted Stock Awards shall be assumed, or
equivalent awards shall be substituted, by the acquiring or succeeding
corporation (or an affiliate thereof), provided that any Options substituted for
Incentive Stock Options shall satisfy, in the determination of the Board, the
requirements of Section 424(a) of the Code; provided, however, that if the
                                            --------  -------
acquiring or succeeding corporation (or an affiliate thereof) does not agree to
assume, or substitute for, such Awards, then:

     (i) with respect to outstanding Options, the Board shall (x) upon written
notice to the Participants, provide that all then unexercised Options will
become exercisable in full as of a specified time (the "Acceleration Time")
prior to the Acquisition Event and will terminate immediately prior to the
consummation of such Acquisition Event except to the extent exercised by the
Participants before the consummation of such Acquisition Event and/or (y) in the
event of an Acquisition Event under the terms of which holders of Common Stock
will receive upon consummation thereof a cash payment for each share of Common
Stock surrendered pursuant to such Acquisition Event (the "Acquisition Price"),
provide that all outstanding Options shall terminate upon consummation of such
Acquisition Event and each Participant shall receive, in exchange therefor, a
cash payment equal to the amount (if any) by which (A) the Acquisition Price
multiplied by the number of shares of Common Stock subject to such outstanding
Options (whether or not then exercisable), exceeds (B) the aggregate exercise
price of such Options;

                                       5


     (ii)  with respect to outstanding Restricted Stock Awards, the repurchase
and other rights of the Company under such Award shall inure to the benefit of
the Company's successor and shall apply to the securities or other property
which the Common Stock was converted into or exchanged for pursuant to such
Acquisition Event in the same manner and to the same extent as they applied to
the Common Stock subject to such Award; and

     (iii) with respect to other outstanding Awards, the Board shall specify the
effect of an Acquisition Event on any other Award granted under the Plan at the
time of the grant of such Award.

           (2) Definition. An "Acquisition Event" shall mean: (a) any merger or
               ----------
consolidation of the Company with or into another entity, other than one in
which the Common Stock is not converted into or exchanged for the right to
receive cash, securities or other property, (b) any sale of all or substantially
all of the assets of the Company or (c) any exchange of shares of the Company
for cash, securities or other property pursuant to a statutory share exchange
transaction.

9.   General Provisions Applicable to Awards
     ---------------------------------------

     (a)   Transferability of Awards. Except as the Board may otherwise
           -------------------------
determine or provide in an Award, Awards shall not be sold, assigned,
transferred, pledged or otherwise encumbered by the person to whom they are
granted, either voluntarily or by operation of law, except by will or the laws
of descent and distribution, and, during the life of the Participant, shall be
exercisable only by the Participant. References to a Participant, to the extent
relevant in the context, shall include references to authorized transferees.

     (b)   Documentation. Each Award under the Plan shall be evidenced by a
           -------------
written instrument in such form as the Board shall determine. Each Award may
contain terms and conditions in addition to those set forth in the Plan.

     (c)   Board Discretion. Except as otherwise provided by the Plan, each type
           ----------------
of Award may be made alone or in addition or in relation to any other type of
Award. The terms of each type of Award need not be identical, and the Board need
not treat Participants uniformly.

     (d)   Termination of Status. The Board shall determine the effect on an
           ---------------------
Award of the disability, death, retirement, authorized leave of absence or other
change in the employment or other status of a Participant and the extent to
which, and the period during which, the Participant, the Participant's legal
representative, conservator, guardian or Designated Beneficiary may exercise
rights under the Award.

                                       6


     (e) Withholding. Each Participant shall pay to the Company, or make
         -----------
provision satisfactory to the Board for payment of, any taxes required by law to
be withheld in connection with Awards to such Participant no later than the date
of the event creating the tax liability. Except as the Board may otherwise
provide in an Award, Participants may satisfy such tax obligations in whole or
in part in shares of Common Stock, including shares retained from the Award
creating the tax obligation, valued at their Fair Market Value. The Company may,
to the extent permitted by law, deduct any such tax obligations from any payment
of any kind otherwise due to a Participant.

     (f) Amendment of Award. The Board may amend, modify or terminate any
         ------------------
outstanding Award, including but not limited to, substituting therefor another
Award of the same or a different type, changing the date of exercise or
realization, and converting an Incentive Stock Option to a Nonstatutory Stock
Option, provided that the Participant's consent to such action shall be required
unless the Board determines that the action, taking into account any related
action, would not materially and adversely affect the Participant.

     (g) Conditions on Delivery of Stock. The Company will not be obligated to
         -------------------------------
deliver any shares of Common Stock pursuant to the Plan or to remove
restrictions from shares previously delivered under the Plan until (i) all
conditions of the Award have been met or removed to the satisfaction of the
Company, (ii) in the opinion of the Company's counsel, all other legal matters
in connection with the issuance and delivery of such shares have been satisfied,
including any applicable securities laws and any applicable stock exchange or
stock market rules and regulations, and (iii) the Participant has executed and
delivered to the Company such representations or agreements as the Company may
consider appropriate to satisfy the requirements of any applicable laws, rules
or regulations.

     (h) Acceleration. The Board may at any time provide that any Options shall
         ------------
become immediately exercisable in full or in part, that any Restricted Stock
Awards shall be free of all restrictions or that any other stock-based Awards
may become exercisable in full or in part or free of some or all restrictions or
conditions, or otherwise realizable in full or in part, as the case may be.

10.  Miscellaneous
     -------------

     (a) No Right To Employment or Other Status. No person shall have any
         --------------------------------------
claim or right to be granted an Award, and the grant of an Award shall not be
construed as giving a Participant the right to continued employment or any other
relationship with the Company. The Company expressly reserves the right at any
time to dismiss or otherwise terminate its relationship with a Participant free
from any liability or claim under the Plan, except as expressly provided in the
applicable Award.

                                       7


     (b) No Rights As Stockholder. Subject to the provisions of the applicable
         ------------------------
Award, no Participant or Designated Beneficiary shall have any rights as a
stockholder with respect to any shares of Common Stock to be distributed with
respect to an Award until becoming the record holder of such shares.
Notwithstanding the foregoing, in the event the Company effects a split of the
Common Stock by means of a stock dividend and the exercise price of and the
number of shares subject to such Option is adjusted as of the date of the
distribution of the dividend (rather than as of the record date for such
dividend), then an optionee who exercises an Option between the close of
business on the record date for such stock dividend and the close of business on
the distribution date for such stock dividend shall be entitled to receive, on
the distribution date, the stock dividend with respect to the shares of Common
Stock acquired upon such Option exercise, notwithstanding the fact that such
shares were not outstanding as of the close of business on the record date for
such stock dividend.

     (c) Effective Date and Term of Plan. The Plan shall become effective on the
         -------------------------------
date on which it is adopted by the Board. No Awards shall be granted under the
Plan after the completion of ten years from the earlier of (i) the date on which
the Plan was adopted by the Board or (ii) the date the Plan was approved by the
Company's stockholders, but Awards previously granted may extend beyond that
date.

     (d) Amendment of Plan. The Board may amend, suspend or terminate the Plan
         -----------------
or any portion thereof at any time.

     (e) Governing Law. The provisions of the Plan and all Awards made hereunder
         -------------
shall be governed by and interpreted in accordance with the laws of the State of
Delaware, without regard to any applicable conflicts of law.

                                       8


                      Cimaron Communications Corporation

                          Restricted Stock Agreement
                    Granted Under 1998 Stock Incentive Plan
                    ---------------------------------------

     AGREEMENT made this ___ day of __________, 19__, between Cimaron
Communications Corporation, a Delaware corporation (the "Company"), and
________________________ (the "Participant").

     For valuable consideration, receipt of which is acknowledged, the parties
hereto agree as follows:

1.   Purchase of Shares.
     -------------------

   The Company shall issue and sell to the Participant, and the Participant
   shall purchase from the Company, subject to the terms and conditions set
   forth in this Agreement and in the Company's 1998 Stock Incentive Plan (the
   "Plan")______ shares (the "Shares") of common stock, $.001 par value, of the
   Company ("Common Stock"), at a purchase price of $._______ per share. The
   aggregate purchase price for the Shares shall be paid by the Participant by
   check payable to the order of the Company or such other method as may be
   acceptable to the Company. Upon receipt by the Company of payment for the
   Shares, the Company shall issue to the Participant one or more certificates
   in the name of the Participant for that number of Shares purchased by the
   Participant. The Participant agrees that the Shares shall be subject to the
   Purchase Option set forth in Section 2 of this Agreement and the restrictions
   on transfer set forth in Section 4 of this Agreement.

2.   Purchase Option.
     ----------------

   (a)   In the event that the Participant ceases to be employed by the Company
      for any reason or no reason, with or without cause, prior to ___________
      [five years from employment


   or commencement], the Company shall have the right and option (the "Purchase
   Option") to purchase from the Participant, for a sum of $______ per share
   (the "Option Price"), some or all of the Unvested Shares. "Unvested Shares"
   means the total number of Shares multiplied by the Applicable Percentage at
   the time the Purchase Option becomes exercisable by the Company. The
   "Applicable Percentage" shall begin as 100% and shall be reduced according to
   the schedule on Exhibit A.
                   ---------

(b)       Notwithstanding the foregoing, in the event of an Acquisition of the
   Company (as defined below), the Applicable Percentage shall, immediately
   prior to the Closing of the Acquisition, be decreased by (i) 20% of the total
   number of Shares, if the Participant has been employed by the Company for 12
   or more months prior to the Acquisition, or (ii) 10% of the total number of
   Shares, if the Participant has been employed by the Company for less than 12
   months prior to the Acquisition. Thereafter, the Applicable Percentage shall
   be reduced in accordance with the total schedule set forth in the immediately
   preceding paragraph, except that such schedule shall be shortened by 12
   months (in the case of an Applicable Percentage reduction under clause (i)
   above) or six months (in the case of an Applicable Percentage reduction under
   clause (ii) above).

(c)       "Acquisition" shall mean (i) the consolidation or merger of the
   Company (other than a merger to reincorporate the Corporation in a different
   jurisdiction) into or with any other entity or entities in which the shares
   of the Corporation outstanding immediately prior to the closing of such event
   represent or are converted into shares of the surviving or resulting entity
   that represent less than a majority of the total number of shares of the
   surviving or resulting entity that are outstanding or are reserved for
   issuance upon the exercise or conversion of outstanding securities
   immediately after the closing of such event, or (ii) the sale or transfer of
   fifty percent (50%) or more of the capital stock of the Corporation in a
   single transaction or series of related transactions or (iii) the sale of all
   or substantially all of the assets of the Company.

(d)       For purposes of this Agreement, employment with the Company shall
   include employment with a parent or subsidiary of the Company.


3.        Exercise of Purchase Option and Closing.
          ----------------------------------------

  (a)          The Company may exercise the Purchase Option by
     delivering or mailing to the Participant (or his estate), within
     60 days after the termination of the employment of the
     Participant with the Company, a written notice of exercise of the
     Purchase Option. Such notice shall specify the number of Shares
     to be purchased. If and to the extent the Purchase Option is not
     so exercised by the giving of such a notice within such 60-day
     period, the Purchase Option shall automatically expire and
     terminate effective upon the expiration of such 60-day period.

  (b)          Within 10 days after his receipt of the Company's
     notice of the exercise of the Purchase Option pursuant to
     subsection (a) above, the Participant (or his estate) shall
     tender to the Company at its principal offices the certificate or
     certificates representing the Shares which the Company has
     elected to purchase in accordance with the terms of this
     Agreement, duly endorsed in blank or with duly endorsed stock
     powers attached thereto, all in form suitable for the transfer of
     such Shares to the Company. Promptly following its receipt of
     such certificate or certificates, the Company shall deliver or
     mail to the Participant a check in the amount of the aggregate
     Option Price therefor.

  (c)          After the time at which any Shares are required to be
     delivered to the Company for transfer to the Company pursuant to
     subsection (b) above, the Company shall not pay any dividend to
     the Participant on account of such Shares or permit the
     Participant to exercise any of the privileges or rights of a
     stockholder with respect to such Shares, but shall, in so far as
     permitted by law, treat the Company as the owner of such Shares.

  (d)          The Option Price may be payable, at the option of the
     Company, in cancellation of all or a portion of any outstanding
     indebtedness of the Participant to the Company or in cash (by
     check) or both.

  (e)          The Company shall not purchase any fraction of a Share
     upon exercise of the Purchase Option, and any fraction of a Share
     resulting from a computation made pursuant to Section 2 of


     this Agreement shall be rounded to the nearest whole Share (with
     any one-half Share being rounded upward).

4.        Restrictions on Transfer.
          ------------------------

  (a)          The Participant shall not sell, assign, transfer,
     pledge, hypothecate or otherwise dispose of, by operation of law
     or otherwise (collectively "transfer"):

  (b)          any Shares, or any interest therein, that are subject
     to the Purchase Option, except that the Participant may transfer
     such Shares to or for the benefit of any parent, spouse, child or
     grandchild, or to a trust for their benefit, provided that such
                                                  --------
     Shares shall remain subject to this Agreement (including without
     limitation the restrictions on transfer set forth in this Section
     4, the Purchase Option and the right of first refusal set forth
     in Section 5) and such permitted transferee shall, as a condition
     to such transfer, deliver to the Company a written instrument
     confirming that such transferee shall be bound by all of the
     terms and conditions of this Agreement; or

  (c)          any Shares, or any interest therein, that are no longer
     subject to the Purchase Option, except in accordance with Section
     5 below.

5.        Right of First Refusal.
          ----------------------

  (a)          If the Participant proposes to transfer any Shares that
     are no longer subject to the Purchase Option (either because they
     are no longer Unvested Shares or because the Purchase Option
     expired unexercised), then the Participant shall first give
     written notice of the proposed transfer (the "Transfer Notice")
     to the Company. The Transfer Notice shall name the proposed
     transferee and state the number of such Shares he proposes to
     transfer the ("Offered Shares"), the price per share and all
     other material terms and conditions of the transfer.

  (b)          For 30 days following its receipt of such Transfer
     Notice, the Company shall have the option to purchase all (but
     not less than all) of the Offered Shares at the price and upon
     the terms set forth in the Transfer Notice. In the event the
     Company elects to


     purchase all of the Offered Shares, it shall give written notice
     of such election to the Participant within such 30-day period.
     Within 10 days after his receipt of such notice, the Participant
     shall tender to the Company at its principal offices the
     certificate or certificates representing the Offered Shares, duly
     endorsed in blank by the Participant or with duly endorsed stock
     powers attached thereto, all in form suitable for transfer of the
     Offered Shares to the Company. Promptly following receipt of such
     certificate or certificates, the Company shall deliver or mail to
     the Participant a check in payment of the purchase price for the
     Offered Shares; provided that if the terms of payment set forth
                     -------- ----
     in the Transfer Notice were other than cash against delivery, the
     Company may pay for the Offered Shares on the same terms and
     conditions as were set forth in the Transfer Notice.

  (c)          If the Company does not elect to acquire all of the
     Offered Shares, the Participant may, within the 30-day period
     following the expiration of the option granted to the Company
     under subsection (b) above, transfer the Offered Shares to the
     proposed transferee, provided that such transfer shall not be on
                          -------- ----
     terms and conditions more favorable to the transferee than those
     contained in the Transfer Notice. Notwithstanding any of the
     above, all Offered Shares transferred pursuant to this Section 5
     shall remain subject to this Agreement (including without
     limitation the restrictions on transfer set forth in Section 4
     and the right of first refusal set forth in this Section 5) and
     such transferee shall, as a condition to such transfer, deliver
     to the Company a written instrument confirming that such
     transferee shall be bound by all of the terms and conditions of
     this Agreement.

  (d)          After the time at which the Offered Shares are required
     to be delivered to the Company for transfer to the Company
     pursuant to subsection (b) above, the Company shall not pay any
     dividend to the Participant on account of such Offered Shares or
     permit the Participant to exercise any of the privileges or
     rights of a stockholder with respect to such Shares, but shall,
     in so far as permitted by law, treat the Company as the owner of
     such Offered Shares.

  (e)          The following transactions shall be exempt from the
     provisions of this Section 5:


     (i)            a transfer of Shares to or for the benefit of any
          parent, spouse, child or grandchild of the Participant, or
          to a trust for their benefit;

     (ii)           any transfer pursuant to an effective registration
          statement filed by the Company under the Securities Act of
          1933, as amended (the "Securities Act"); and

     (iii)          any transfer of the shares pursuant to the sale of
          all or substantially all of the business of the Company;
          provided, however, that in the case of a transfer pursuant
          --------  -------
          to clause (1) above, such Shares shall remain subject to
          this Agreement (including without limitation the
          restrictions on transfer set forth in Section 4 and the
          right of first refusal set forth in this Section 5) and such
          transferee shall as a condition to such transfer, deliver to
          the Company a written instrument confirming that such
          transferee shall be bound by all of the terms and conditions
          of this Agreement.

  (f)          The Company may assign its rights to purchase Offered
     Shares in any particular transaction under this Section 5 to one
     or more persons or entities.

  (g)          The provisions of this Section 5 shall terminate upon
     the earlier of the following events:

     (i)            the closing of the sale of shares of Common Stock
          in an underwritten public offering pursuant to an effective
          registration statement filed by the Company under the
          Securities Act at a price to the public of at least $5.00
          per share (subject to appropriate adjustments for stock
          splits, stock dividends, combinations and other similar
          recapitalizations affecting such shares) resulting in gross
          proceeds to the Company of at least $10,000,000; or

     (ii)           an Acquisition.

6.          Agreement in Connection with Public Offering.
            --------------------------------------------

The Participant agrees, in connection with the initial underwritten
public offering of the Company's securities pursuant to a registration
statement under the Securities Act, (i) not to sell, make short sale
of, loan, grant any


options for the purchase of, or otherwise dispose of any shares of
Common Stock held by the Participant (other than those shares included
in the offering) without the prior written consent of the Company or
the underwriters managing such initial underwritten public offering of
the Company's securities for a period of 180 days from the effective
date of such registration statement, and (ii) to execute any agreement
reflecting clause (i) above as may be requested by the Company or the
managing underwriters at the time of such initial public offering.

7.             Effect of Prohibited Transfer.
               ------------------------------

The Company shall not be required (a) to transfer on its books any of
the Shares which shall have been sold or transferred in violation of
any of the provisions set forth in this Agreement, or (b) to treat as
owner of such Shares or to pay dividends to any transferee to whom any
such Shares shall have been so sold or transferred.

8.             Escrow.
               -------

The Participant shall, upon the execution of this Agreement, execute
Joint Escrow Instructions in the form attached to this Agreement as
Exhibit B. The Joint Escrow Instructions shall be delivered to the
- ---------
Secretary of the Company, as escrow agent thereunder. The Participant
shall deliver to such escrow agent a stock assignment duly endorsed in
blank and hereby instructs the Company to deliver to such escrow
agent, on behalf of the Participant, the certificate(s) evidencing the
Shares issued hereunder. Such materials shall be held by such escrow
agent pursuant to the terms of such Joint Escrow Instructions.

9.             Restrictive Legend.
               -------------------

All certificates representing Shares shall have affixed thereto a
legend in substantially the following form, in addition to any other
legends that may be required under federal or state securities laws:

     (i)       "The shares of stock represented by this certificate
          are subject to restrictions on transfer and an option to
          purchase set forth in a certain Stock Restriction Agreement
          between the corporation and the registered owner of these
          shares (or his predecessor in interest), and such Agreement
          is available for inspection without charge at the office of
          the Secretary of the corporation."


     available for at least one year and even then will not be available unless
     a public market then exists for the Common Stock, adequate information
     concerning the Company is then available to the public, and other terms and
     conditions of Rule 144 are complied with; and (iv) there is now no
     registration statement on file with the Securities and Exchange Commission
     with respect to any stock of the Company and the Company has no obligation
     or current intention to register the Shares under the Securities Act.

12.       Withholding Taxes; Section 83(b) Election.
          ------------------------------------------

  (a)          The Participant acknowledges and agrees that the Company has the
     right to deduct from payments of any kind otherwise due to the Participant
     any federal, state or local taxes of any kind required by law to be
     withheld with respect to the purchase of the Shares by the Participant or
     the lapse of the Purchase Option.

  (b)          The Participant acknowledges that he has been informed of the
     availability of making an election in accordance with Section 83(b) of the
     Internal Revenue Code of 1986, as amended; that such election must be filed
     with the Internal Revenue Service within 30 days of the transfer of shares
     to the Participant; and that the Participant is solely responsible for
     making such election.


     (ii)    "The shares represented by this certificate have not been
          registered under the Securities Act of 1933, as amended, and
          may not be sold, transferred or otherwise disposed of in the
          absence of an effective registration statement under such
          Act or an opinion of counsel satisfactory to the corporation
          to the effect that such registration is not required."

10.          Provisions of the Plan.
             -----------------------

This Agreement is subject to the provisions of the Plan, a copy of which is
furnished to the Participant with this Agreement.

11.          Investment Representations.
             ---------------------------

The Participant represents, warrants and covenants as follows:

  (a)           The Participant is purchasing the Shares for his own account for
     investment only, and not with a view to, or for sale in connection with,
     any distribution of the Shares in violation of the Securities Act, or any
     rule or regulation under the Securities Act.

  (b)           The Participant has had such opportunity as he has deemed
     adequate to obtain from representatives of the Company such information as
     is necessary to permit him to evaluate the merits and risks of his
     investment in the Company.

  (c)           The Participant has sufficient experience in business, financial
     and investment matters to be able to evaluate the risks involved in the
     purchase of the Shares and to make an informed investment decision with
     respect to such purchase.

  (d)           The Participant can afford a complete loss of the value of the
     Shares and is able to bear the economic risk of holding such Shares for an
     indefinite period.

  (e)           The Participant understands that (i) the Shares have not been
     registered under the Securities Act and are "restricted securities" within
     the meaning of Rule 144 under the Securities Act, (ii) the Shares cannot be
     sold, transferred or otherwise disposed of unless they are subsequently
     registered under the Securities Act or an exemption from registration is
     then available; (iii) in any event, the exemption from registration under
     Rule 144 will not be


13.       Severability.
          ------------

The invalidity or unenforceability of any provision of this Agreement shall not
affect the validity or enforceability of any other provision of this Agreement,
and each other provision of this Agreement shall be severable and enforceable to
the extent permitted by law.

14.       Waiver.
          -------

Any provision for the benefit of the Company contained in this Agreement may be
waived, either generally or in any particular instance, by the Board of
Directors of the Company.

15.       Binding Effect.
          ---------------

This Agreement shall be binding upon and inure to the benefit of the Company and
the Participant and their respective heirs, executors, administrators, legal
representatives, successors and assigns, subject to the restrictions on transfer
set forth in Sections 4 and 5 of this Agreement.

16.       Notice.
          -------

All notices required or permitted hereunder shall be in writing and deemed
effectively given upon personal delivery or five days after deposit in the
United States Post Office, by registered or certified mail, postage prepaid,
addressed to the other party hereto at the address shown beneath his or its
respective signature to this Agreement, or at such other address or addresses as
either party shall designate to the other in accordance with this Section 16.

17.       Pronouns.
          ---------

Whenever the context may require, any pronouns used in this Agreement shall
include the corresponding masculine, feminine or neuter forms, and the singular
form of nouns and pronouns shall include the plural, and vice versa.

18.       Entire Agreement.
          -----------------

This Agreement and the Plan constitutes the entire agreement between the
parties, and supersedes all prior agreements and understandings, relating to the
subject matter of this Agreement.


19.       Amendment.
          ----------

This Agreement may be amended or modified only by a written instrument executed
by both the Company and the Participant.


20.       Governing Law.
          -------------

     This Agreement shall be construed, interpreted and enforced in accordance
with the internal laws of the State of Delaware without regard to any applicable
conflicts of laws.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.


                                             CIMARON COMMUNICATIONS
                                              CORPORATION


                                             By:____________________________
                                             Title:_________________________
                                                     200 Brickstone Square
                                                     Andover, MA 01810


                                             PARTICIPANT



                                             _______________________________
                                             Name: _________________________
                                             Address:_______________________
                                             _______________________________


                                   Exhibit A
                                   ---------



If Cessation of Employment Occurs:                        Applicable Percentage:
- --------------------------------------------------------------------------------
                                                       
Before [1 year from commencement]                                     100%

On or after [1 year] but before [1.25 years]                           80%

On or after [1.25 years] but before [1.50 years]                       75%

On or after [1.50 years] but before [1.75 years]                       70%

On or after [1.75 years] but before [2 years]                          65%

On or after [2 years] but before [2.25 years]                          60%

On or after [2.25 years] but before [2.50 years]                       55%

On or after [2.50 years] but before [2.75 years]                       50%

On or after [2.75 years] but before [3 years]                          45%

On or after [3 years] but before [3.25 years]                          40%

On or after [3.25 years] but before [3.50 years]                       35%

On or after [3.50 years] but before [3.75 years]                       30%

On or after [3.75 years] but before [4 years]                          25%

On or after [4 years] but before [4.25 years]                          20%

On or after [4.25 years] but before [4.50 years]                       15%

On or after [4.50 years] but before [4.75 years]                       10%

On or after [4.75 years] but before [5 years]                           5%

On or after [5 years]                                                  -0-



                                                                       Exhibit B
                                                                       ---------


                      CIMARON COMMUNICATIONS CORPORATION


                           Joint Escrow Instructions
                           -------------------------


                            ________________, 199__



Secretary
Cimaron Communications Corporation
200 Brickstone Square
Andover, MA 01810


Dear Sir:

     As Escrow Agent for Cimaron Communications Corporation, a Delaware
corporation (the "Company"), and the undersigned Participant ("Holder"), you are
hereby authorized and directed to hold the documents delivered to you pursuant
to the terms of that certain Restricted Stock Agreement (the "Agreement") of
even date herewith, to which a copy of these Joint Escrow Instructions is
attached, in accordance with the following instructions:

1.        Holder irrevocably authorizes the Company to deposit with you any
  certificates evidencing Shares (as defined in the Agreement) to be held by you
  hereunder and any additions and substitutions to said Shares. Holder does
  hereby irrevocably constitute and appoint you as his attorney-in-fact and
  agent for the term of this escrow to execute with respect to such Shares all
  documents necessary or appropriate to make such Shares negotiable and to
  complete any transaction herein contemplated. Subject to the provisions of
  this paragraph 1 and the terms of the Agreement, Holder shall exercise all
  rights and privileges of a stockholder of the Company while the Shares are
  held by you.

2.        Upon any purchase by the Company of the Shares pursuant to the
  Agreement, the Company shall give to Holder and you a written notice
  specifying the purchase price for the Shares, as determined pursuant to the
  Agreement, and the time for a closing hereunder (the "Closing") at the
  principal office of the


  Company. Holder and the Company hereby irrevocably authorize and direct you to
  close the transaction contemplated by such notice in accordance with the terms
  of said notice.

3.        At the Closing, you are directed (a) to date the stock assignment form
  or forms necessary for the transfer of the Shares, (b) to fill in on such form
  or forms the number of Shares being transferred, and (c) to deliver same,
  together with the certificate or certificates evidencing the Shares to be
  transferred, to the Company against the simultaneous delivery to you of the
  purchase price for the Shares being purchased pursuant to the Agreement.

4.        The Holder shall have the right to withdraw from this escrow any
  Shares as to which the Purchase Option (as defined in the Agreement) has
  terminated or expired.

5.        Your duties hereunder may be altered, amended, modified or revoked
  only by a writing signed by all of the parties hereto.

6.        You shall be obligated only for the performance of such duties as are
  specifically set forth herein and may rely and shall be protected in relying
  or refraining from acting on any instrument reasonably believed by you to be
  genuine and to have been signed or presented by the proper party or parties.
  You shall not be personally liable for any act you may do or omit to do
  hereunder as Escrow Agent or as attorney-in-fact of Holder while acting in
  good faith and in the exercise of your own good judgment, and any act done or
  omitted by you pursuant to the advice of your own attorneys shall be
  conclusive evidence of such good faith.

7.        You are hereby expressly authorized to disregard any and all warnings
  given by any of the parties hereto or by any other person or Company,
  excepting only orders or process of courts of law, and are hereby expressly
  authorized to comply with and obey orders, judgments or decrees of any court.
  In case you obey or comply with any such order, judgment or decree of any
  court, you shall not be liable to any of the parties hereto or to any other
  person, firm or Company by reason of such compliance, notwithstanding any such
  order, judgment or decree being subsequently reversed, modified, annulled, set
  aside, vacated or found to have been entered without jurisdiction.

8.        You shall not be liable in any respect on account of the identity,
  authority or rights of the parties executing or delivering or purporting to
  execute or deliver the Agreement or any documents or papers deposited or
  called for hereunder.


9.        You shall be entitled to employ such legal counsel and other experts
  as you may deem necessary properly to advise you in connection with your
  obligations hereunder and may rely upon the advice of such counsel.

10.       Your responsibilities as Escrow Agent hereunder shall terminate if you
  shall cease to be Secretary of the Company or if you shall resign by written
  notice to each party. In the event of any such termination, the Company shall
  appoint any officer of the Company as successor Escrow Agent.

11.       If you reasonably require other or further instruments in connection
  with these Joint Escrow Instructions or obligations in respect hereto, the
  necessary parties hereto shall join in furnishing such instruments.

12.       It is understood and agreed that should any dispute arise with respect
  to the delivery and/or ownership or right of possession of the securities held
  by you hereunder, you are authorized and directed to retain in your possession
  without liability to anyone all or any part of said securities until such
  dispute shall have been settled either by mutual written agreement of the
  parties concerned or by a final order, decree or judgment of a court of
  competent jurisdiction after the time for appeal has expired and no appeal has
  been perfected, but you shall be under no duty whatsoever to institute or
  defend any such proceedings.

13.       Any notice required or permitted hereunder shall be given in writing
  and shall be deemed effectively given upon personal delivery or upon deposit
  in the United States Post Office, by registered or certified mail with postage
  and fees prepaid, addressed to each of the other parties thereunto entitled at
  the following addresses, or at such other addresses as a party may designate
  by ten days' advance written notice to each of the other parties hereto.

                              COMPANY:  Cimaron Communications Corporation
                              200 Brickstone Square
                              Andover, MA 01810

                              HOLDER:   Notices to Holder shall be sent to the
                              address set forth below Holder's signature below.


                              ESCROW AGENT:
                              Secretary
                              Cimaron Communications Corporation
                              200 Brickstone Square
                              Andover, MA 01810


          By signing these Joint Escrow Instructions, you become a party hereto
only for the purpose of said Joint Escrow Instructions, and you do not become a
party to the Agreement.

          This instrument shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns.


                                   Very truly yours,


                                   CIMARON COMMUNICATIONS
                                   CORPORATION


                                   By:   _____________________________
                                   Title:_____________________________
                                             200 Brickstone Square
                                             Andover, MA 01810


                                   HOLDER:


                                   ___________________________________
                                   Name: _____________________________
ESCROW AGENT: Address:             Address: __________________________
                                                ______________________
                                                ______________________
_____________________________      Date Signed: ______________________


                      Cimaron Communications Corporation

                          Restricted Stock Agreement
                    Granted Under 1998 Stock Incentive Plan
                    ---------------------------------------


     AGREEMENT made this ___ day of___________, 199___, between
Cimaron Communications Corporation, a Delaware corporation (the
"Company"), and __________________________ (the "Participant").

     For valuable consideration, receipt of which is acknowledged, the
parties hereto agree as follows:

1.        Purchase of Shares.
          ------------------

     The Company shall issue and sell to the Participant, and the
     Participant shall purchase from the Company, subject to the terms
     and conditions set forth in this Agreement and in the Company's
     1998 Stock Incentive Plan (the "Plan")______ shares (the
     "Shares") of common stock, $.001 par value, of the Company
     ("Common Stock"), at a purchase price of $.___ per share. The
     aggregate purchase price for the Shares shall be paid by the
     Participant by check payable to the order of the Company or such
     other method as may be acceptable to the Company. Upon receipt by
     the Company of payment for the Shares, the Company shall issue to
     the Participant one or more certificates in the name of the
     Participant for that number of Shares purchased by the
     Participant. The Participant agrees that the Shares shall be
     subject to the Purchase Option set forth in Section 2 of this
     Agreement and the restrictions on transfer set forth in Section 4
     of this Agreement.

2.        Purchase Option.
          ---------------

     (a)       In the event that the Participant ceases to be employed
     by the Company for any reason or no reason, with or without
     cause, prior to ___________ [five years from employment


     or commencement], the Company shall have the right and option
     (the "Purchase Option") to purchase from the Participant, for a
     sum of $___ per share (the "Option Price"), some or all of the
     Unvested Shares. "Unvested Shares" means the total number of
     Shares multiplied by the Applicable Percentage at the time the
     Purchase Option becomes exercisable by the Company. The
     "Applicable Percentage" shall begin as 100% and shall be reduced
     according to the schedule on Exhibit A.
                                  ---------

  (b)     Notwithstanding the foregoing, in the event of an
     Acquisition of the Company (as defined below), the Applicable
     Percentage shall, immediately prior to the closing of the
     Acquisition, be decreased by (i) 20% of the total number of
     Shares, if the Participant has been employed by the Company for
     12 or more months prior to the Acquisition, or (ii) 30% of the
     total number of Shares, if the Participant has been employed by
     the Company for less than 12 months prior to the Acquisition.
     Thereafter, the Applicable Percentage shall be reduced in
     accordance with the total schedule set forth in the immediately
     preceding paragraph, except that such schedule shall be shortened
     by 12 months (in the case of an Applicable Percentage reduction
     under clause (i) above) or 18 months (in the case of an
     Applicable Percentage reduction under clause (ii) above), and
     further, if Participant's employment is terminated Without Cause
     (as defined below) prior to the first anniversary of the date of
     the Acquisition, 50% of such Participant's then remaining
     Unvested Shares shall become vested as of such date of
     termination.

     For the purposes of this Section 2(b) "Without Cause" shall mean
     (a) termination of the Participant's employment for any reason
     other than (1) the breach by such Participant of either the
     Noncompetition Agreement or the Nondisclosure and Developments
     Agreement entered into by such Participant in favor of the
     Company, (2) the commission by such Participant of an act of
     fraud or embezzlement, (3) the deliberate disregard by such
     Participant of the rules or policies of the Company, which
     disregard is not remedied within 30 days after written notice
     from the Company describing such disregard, or the commission by
     the Participant of any other action with the intent to injure
     materially the Company, (4) such Participant being found guilty
     or entering a plea of nolo contendre in a criminal court of a
     felony; or (5) such Participant's willful breach of duty or
     habitual neglect of duty, or refusal to comply with any
     reasonable or proper direction given by or on behalf of the Board
     of Directors which breach, neglect or refusal is not remedied
     within 30 days after written notice from the Company describing
     such breach, neglect or refusal, and (b) a material reduction of
     such Participant's


     responsibility or a reduction in such Participant's cash
     compensation without a correlating increase in other compensation
     or benefits or the required relocation of the Participant's
     principal place of employment to a new location more than sixty
     (60) miles distant from the immediately preceding principal place
     of employment.

  (c)     "Acquisition" shall mean (i) the consolidation or merger of
     the Company (other than a merger to reincorporate the Corporation
     in a different jurisdiction) into or with any other entity or
     entities in which the shares of the Corporation outstanding
     immediately prior to the closing of such event represent or are
     converted into shares of the surviving or resulting entity that
     represent less than a majority of the total number of shares of
     the surviving or resulting entity that are outstanding or are
     reserved for issuance upon the exercise or conversion of
     outstanding securities immediately after the closing of such
     event, or (ii) the sale or transfer of fifty percent (50%) or
     more of the capital stock of the Corporation in a single
     transaction or series of related transactions or (iii) the sale
     of all or substantially all of the assets of the Company.

  (d)     For purposes of this Agreement, employment with the Company
     shall include employment with a parent or subsidiary of the
     Company.
     3.     Exercise of Purchase Option and Closing.
       ----------------------------------------

  (a)     The Company may exercise the Purchase Option by delivering
     or mailing to the Participant (or his estate), within 60 days
     after the termination of the employment of the Participant with
     the Company, a written notice of exercise of the Purchase Option.
     Such notice shall specify the number of Shares to be purchased.
     If and to the extent the Purchase Option is not so exercised by
     the giving of such a notice within such 60-day period, the
     Purchase Option shall automatically expire and terminate
     effective upon the expiration of such 60-day period.

  (b)     Within 10 days after his receipt of the Company's notice of
     the exercise of the Purchase Option pursuant to subsection (a)
     above, the Participant (or his estate) shall tender to the
     Company at its principal offices the certificate or certificates
     representing the Shares which the Company has elected to purchase
     in accordance with the terms of this Agreement, duly


     endorsed in blank or with duly endorsed stock powers attached
     thereto, all in form suitable for the transfer of such Shares to
     the Company. Promptly following its receipt of such certificate
     or certificates, the Company shall deliver or mail to the
     Participant a check in the amount of the aggregate Option Price
     therefor.

  (c)     After the time at which any Shares are required to be
     delivered to the Company for transfer to the Company pursuant to
     subsection (b) above, the Company shall not pay any dividend to
     the Participant on account of such Shares or permit the
     Participant to exercise any of the privileges or rights of a
     stockholder with respect to such Shares, but shall, in so far as
     permitted by law, treat the Company as the owner of such Shares.

  (d)     The Option Price may be payable, at the option of the
     Company, in cancellation of all or a portion of any outstanding
     indebtedness of the Participant to the Company or in cash (by
     check) or both.

  (e)     The Company shall not purchase any fraction of a Share upon
     exercise of the Purchase Option, and any fraction of a Share
     resulting from a computation made pursuant to Section 2 of this
     Agreement shall be rounded to the nearest whole Share (with any
     one-half Share being rounded upward).

4.     Restrictions on Transfer.
       -------------------------

  (a)     The Participant shall not sell, assign, transfer, pledge,
     hypothecate or otherwise dispose of, by operation of law or
     otherwise (collectively "transfer"):

  (b)     any Shares, or any interest therein, that are subject to the
     Purchase Option, except that the Participant may transfer such
     Shares to or for the benefit of any parent, spouse, child or
     grandchild, or to a trust for their benefit, provided that such
                                                  --------
     Shares shall remain subject to this Agreement (including without
     limitation the restrictions on transfer set forth in this Section
     4, the Purchase Option and the right of first refusal set forth
     in Section 5) and such permitted transferee shall, as a condition
     to such transfer, deliver to the Company a written instrument
     confirming that such transferee shall be bound by all of the
     terms and conditions of this Agreement; or


  (c)     any Shares, or any interest therein, that are no longer subject to the
     Purchase Option, except in accordance with Section 5 below.

5.     Right of First Refusal.
       -----------------------

  (a)     If the Participant proposes to transfer any Shares that are
     no longer subject to the Purchase Option (either because they are
     no longer Unvested Shares or because the Purchase Option expired
     unexercised), then the Participant shall first give written
     notice of the proposed transfer (the "Transfer Notice") to the
     Company. The Transfer Notice shall name the proposed transferee
     and state the number of such Shares he proposes to transfer the
     ("Offered Shares"), the price per share and all other material
     terms and conditions of the transfer.

  (b)     For 30 days following its receipt of such Transfer Notice,
     the Company shall have the option to purchase all (but not less
     than all) of the Offered Shares at the price and upon the terms
     set forth in the Transfer Notice. In the event the Company elects
     to purchase all of the Offered Shares, it shall give written
     notice of such election to the Participant within such 30-day
     period. Within 10 days after his receipt of such notice, the
     Participant shall tender to the Company at its principal offices
     the certificate or certificates representing the Offered Shares,
     duly endorsed in blank by the Participant or with duly endorsed
     stock powers attached thereto, all in form suitable for transfer
     of the Offered Shares to the Company. Promptly following receipt
     of such certificate or certificates, the Company shall deliver or
     mail to the Participant a check in payment of the purchase price
     for the Offered Shares; provided that if the terms of payment set
                             -------- ----
     forth in the Transfer Notice were other than cash against
     delivery, the Company may pay for the Offered Shares on the same
     terms and conditions as were set forth in the Transfer Notice.

  (c)     If the Company does not elect to acquire all of the Offered
     Shares, the Participant may, within the 30-day period following
     the expiration of the option granted to the Company under
     subsection (b) above, transfer the Offered Shares to the proposed
     transferee, provided that such transfer shall not be on
                 -------- ----


       terms and conditions more favorable to the transferee than
       those contained in the Transfer Notice. Notwithstanding any of
       the above, all Offered Shares transferred pursuant to this
       Section 5 shall remain subject to this Agreement (including
       without limitation the restrictions on transfer set forth in
       Section 4 and the right of first refusal set forth in this
       Section 5) and such transferee shall, as a condition to such
       transfer, deliver to the Company a written instrument
       confirming that such transferee shall be bound by all of the
       terms and conditions of this Agreement.

   (d)    After the time at which the Offered Shares are required to
       be delivered to the Company for transfer to the Company
       pursuant to subsection (b) above, the Company shall not pay any
       dividend to the Participant on account of such Offered Shares
       or permit the Participant to exercise any of the privileges or
       rights of a stockholder with respect to such Shares, but shall,
       in so far as permitted by law, treat the Company as the owner
       of such Offered Shares.

   (e)    The following transactions shall be exempt from the
       provisions of this Section 5:

       (i)          a transfer of Shares to or for the benefit of any
             parent, spouse, child or grandchild of the Participant,
             or to a trust for theft benefit;

       (ii)         any transfer pursuant to an effective registration
             statement filed by the Company under the Securities Act
             of 1933, as amended (the "Securities Act"); and

       (iii)        any transfer of the shares pursuant to the sale of
             all or substantially all of the business of the Company;
             provided, however, that in the case of a transfer
             pursuant to clause (1) above, such Shares shall remain
             subject to this Agreement (including without limitation
             the restrictions on transfer set forth in Section 4 and
             the right of first refusal set forth in this Section 5)
             and such transferee shall as a condition to such
             transfer, deliver to the Company a written instrument
             confirming that such transferee shall be bound by all of
             the terms and conditions of this Agreement.


   (f)     The Company may assign its rights to purchase Offered
       Shares in any particular transaction under this Section 5 to
       one or more persons or entities.

   (g)     The provisions of this Section 5 shall terminate upon the
       earlier of the following events:

       (i)          the closing of the sale of shares of Common Stock
           in an underwritten public offering pursuant to an effective
           registration statement filed by the Company under the
           Securities Act at a price to the public of at least $5.00
           per share (subject to appropriate adjustments for stock
           splits, stock dividends, combinations and other similar
           recapitalizations affecting such shares) resulting in gross
           proceeds to the Company of at least $10,000,000; or

       (ii)         an Acquisition.

6.         Agreement in Connection with Public Offering.
           --------------------------------------------

The Participant agrees, in connection with the initial underwritten
public offering of the Company's securities pursuant to a registration
statement under the Securities Act, (i) not to sell, make short sale
of, loan, grant any options for the purchase of, or otherwise dispose
of any shares of Common Stock held by the Participant (other than
those shares included in the offering) without the prior written
consent of the Company or the underwriters managing such initial
underwritten public offering of the Company's securities for a period
of 180 days from the effective date of such registration statement,
and (ii) to execute any agreement reflecting clause (i) above as may
be requested by the Company or the managing underwriters at the time
of such initial public offering.

7.         Effect of Prohibited Transfer.
           -----------------------------

The Company shall not be required (a) to transfer on its books any of
the Shares which shall have been sold or transferred in violation of
any of the provisions set forth in this Agreement, or (b) to treat as
owner of such Shares or to pay dividends to any transferee to whom any
such Shares shall have been so sold or transferred.

8.         Escrow.
           ------


The Participant shall, upon the execution of this Agreement, execute
Joint Escrow Instructions in the form attached to this Agreement as
Exhibit B. The Joint Escrow Instructions shall be delivered to the
- ---------
Secretary of the Company, as escrow agent thereunder. The Participant
shall deliver to such escrow agent a stock assignment duly endorsed in
blank and hereby instructs the Company to deliver to such escrow
agent, on behalf of the Participant, the certificate(s) evidencing the
Shares issued hereunder. Such materials shall be held by such escrow
agent pursuant to the terms of such Joint Escrow Instructions.

9.         Restrictive Legend.
           ------------------

All certificates representing Shares shall have affixed thereto a
legend in substantially the following form, in addition to any other
legends that may be required under federal or state securities laws:

      (i)    "The shares of stock represented by this certificate are
           subject to restrictions on transfer and an option to
           purchase set forth in a certain Stock Restriction Agreement
           between the corporation and the registered owner of these
           shares (or his predecessor in interest), and such Agreement
           is available for inspection without charge at the office of
           the Secretary of the corporation."

      (ii)   "The shares represented by this certificate have not been
           registered under the Securities Act of 1933, as amended,
           and may not be sold, transferred or otherwise disposed of
           in the absence of an effective registration statement under
           such Act or an opinion of counsel satisfactory to the
           corporation to the effect that such registration is not
           required."

10.          Provisions of the Plan.
             ----------------------

This Agreement is subject to the provisions of the Plan, a copy of
which is furnished to the Participant with this Agreement.

11.          Investment Representations.
             --------------------------

The Participant represents, warrants and covenants as follows:

   (a)         The Participant is purchasing the Shares for his own
       account for investment only, and not with a view to, or for
       sale in connection with, any



       distribution of the Shares in violation of the Securities Act, or any
       rule or regulation under the Securities Act.

   (b)         The Participant has had such opportunity as he has deemed
       adequate to obtain from representatives of the Company such information
       as is necessary to permit him to evaluate the merits and risks of his
       investment in the Company.

   (c)         The Participant has sufficient experience in business, financial
       and investment matters to be able to evaluate the risks involved in the
       purchase of the Shares and to make an informed investment decision with
       respect to such purchase.

   (d)         The Participant can afford a complete loss of the value of the
       Shares and is able to bear the economic risk of holding such Shares for
       an indefinite period.

   (e)         The Participant understands that (i) the Shares have not been
       registered under the Securities Act and are "restricted securities"
       within the meaning of Rule 144 under the Securities Act, (ii) the Shares
       cannot be sold, transferred or otherwise disposed of unless they are
       subsequently registered under the Securities Act or an exemption from
       registration is then available; (iii) in any event, the exemption from
       registration under Rule 144 will not be available for at least one year
       and even then will not be available unless a public market then exists
       for the Common Stock, adequate information concerning the Company is then
       available to the public, and other terms and conditions of Rule 144 are
       complied with; and (iv) there is now no registration statement on file
       with the Securities and Exchange Commission with respect to any stock of
       the Company and the Company has no obligation or current intention to
       register the Shares under the Securities Act.

12.          Withholding Taxes; Section 83(b) Election.
             ------------------------------------------

   (a)         The Participant acknowledges and agrees that the Company has the
       right to deduct from payments of any kind otherwise due to the
       Participant any federal, state or local taxes of any kind required by law
       to be withheld with respect to the purchase of the Shares by the
       Participant or the lapse of the Purchase Option.

   (b)         The Participant acknowledges that he has been informed of the
       availability of making an election in accordance with Section 83(b) of
       the Internal Revenue Code of 1986, as amended; that such election must be
       filed


       with the Internal Revenue Service within 30 days of the transfer of
       shares to the Participant; and that the Participant is solely responsible
       for making such election.


13.          Severability.
             ------------

The invalidity or unenforceability of any provision of this Agreement shall not
affect the validity or enforceability of any other provision of this Agreement,
and each other provision of this Agreement shall be severable and enforceable to
the extent permitted by law.

14.          Waiver.
             ------

Any provision for the benefit of the Company contained in this Agreement may be
waived, either generally or in any particular instance, by the Board of
Directors of the Company.

15.          Binding Effect.
             --------------

This Agreement shall be binding upon and inure to the benefit of the Company and
the Participant and their respective heirs, executors, administrators, legal
representatives, successors and assigns, subject to the restrictions on transfer
set forth in Sections 4 and 5 of this Agreement.

16.          Notice.
             ------

All notices required or permitted hereunder shall be in writing and deemed
effectively given upon personal delivery or five days after deposit in the
United States Post Office, by registered or certified mail, postage prepaid,
addressed to the other party hereto at the address shown beneath his or its
respective signature to this Agreement, or at such other address or addresses as
either party shall designate to the other in accordance with this Section 16.

17.          Pronouns.
             --------

Whenever the context may require, any pronouns used in this Agreement shall
include the corresponding masculine, feminine or neuter forms, and the singular
form of nouns and pronouns shall include the plural, and vice versa.

18.          Entire Agreement.
             ----------------

This Agreement and the Plan constitutes the entire agreement between the
parties, and supersedes all prior agreements and understandings, relating to the
subject matter of this Agreement.


19.          Amendment.
             ---------

This Agreement may be amended or modified only by a written instrument executed
by both the Company and the Participant.


20.          Governing Law.
             --------------

     This Agreement shall be construed, interpreted and enforced in accordance
with the internal laws of the State of Delaware without regard to any applicable
conflicts of laws.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.


                                             CIMARON COMMUNICATIONS

                                             CORPORATION


                                             By:____________________________
                                             Title:_________________________
                                                     200 Brickstone Square
                                                     Andover, MA 01810


                                             PARTICIPANT


                                             _______________________________
                                             Name:__________________________
                                             Address:_______________________
                                                     _______________________


                                   Exhibit A
                                   ---------

If Cessation of Employment Occurs:                     Applicable Percentage:
- --------------------------------------------------------------------------------

Before [1 year from commencement]                              100%

On or after [1 year] but before [1.25 years]                    80%

On or after [1.25 years] but before [1.50 years]                75%

On or after [1.50 years] but before [1.75 years]                70%

On or after [1.75 years] but before [2 years]                   65%

On or after [2 years] but before [2.25 years]                   60%

On or after [2.25 years] but before [2.50 years]                55%

On or after [2.50 years] but before [2.75 years]                50%

On or after [2.75 years] but before [3 years]                   45%

On or after [3 years] but before [3.25 years]                   40%

On or after [3.25 years] but before [3.50 years]                35%

On or after [3.50 years] but before [3.75 years]                30%

On or after [3.75 years] but before [4 years]                   25%

On or after [4 years] but before [4.25 years]                   20%

On or after [4.25 years] but before [4.50 years]                15%

On or after [4.50 years] but before [4.75 years]                10%

On or after [4.75 years] but before [5 years]                    5%

On or after [5 years]                                           -0-


                                                                       Exhibit B
                                                                       ---------


                       CIMARON COMMUNICATIONS CORPORATION


                           Joint Escrow Instructions
                           -------------------------



                            ________________, 199__



Secretary
Cimaron Communications Corporation
200 Brickstone Square
Andover, MA 01810

Dear Sir:

     As Escrow Agent for Cimaron Communications Corporation, a Delaware
corporation (the "Company"), and the undersigned Participant ("Holder"), you are
hereby authorized and directed to hold the documents delivered to you pursuant
to the terms of that certain Restricted Stock Agreement (the "Agreement") of
even date herewith, to which a copy of these Joint Escrow Instructions is
attached, in accordance with the following instructions:

1.        Holder irrevocably authorizes the Company to deposit with you any
     certificates evidencing Shares (as defined in the Agreement) to be held by
     you hereunder and any additions and substitutions to said Shares. Holder
     does hereby irrevocably constitute and appoint you as his attorney-in-fact
     and agent for the term of this escrow to execute with respect to such
     Shares all documents necessary or appropriate to make such Shares
     negotiable and to complete any transaction herein contemplated. Subject to
     the provisions of this paragraph 1 and the terms of the Agreement, Holder
     shall exercise all rights and privileges of a stockholder of the Company
     while the Shares are held by you.

2.        Upon any purchase by the Company of the Shares pursuant to the
     Agreement, the Company shall give to Holder and you a written notice
     specifying the purchase price for the Shares, as determined pursuant to the
     Agreement, and the time for a closing hereunder (the "Closing") at the
     principal office of the


     Company. Holder and the Company hereby irrevocably authorize and direct you
     to close the transaction contemplated by such notice in accordance with the
     terms of said notice.

3.        At the Closing, you are directed (a) to date the stock assignment form
     or forms necessary for the transfer of the Shares, (b) to fill in on such
     form or forms the number of Shares being transferred, and (c) to deliver
     same, together with the certificate or certificates evidencing the Shares
     to be transferred, to the Company against the simultaneous delivery to you
     of the purchase price for the Shares being purchased pursuant to the
     Agreement.

4.        The Holder shall have the right to withdraw from this escrow any
     Shares as to which the Purchase Option (as defined in the Agreement) has
     terminated or expired.

5.        Your duties hereunder may be altered, amended, modified or revoked
     only by a writing signed by all of the parties hereto.

6.        You shall be obligated only for the performance of such duties as are
     specifically set forth herein and may rely and shall be protected in
     relying or refraining from acting on any instrument reasonably believed by
     you to be genuine and to have been signed or presented by the proper party
     or parties. You shall not be personally liable for any act you may do or
     omit to do hereunder as Escrow Agent or as attorney-in-fact of Holder while
     acting in good faith and in the exercise of your own good judgment, and any
     act done or omitted by you pursuant to the advice of your own attorneys
     shall be conclusive evidence of such good faith.

7.        You are hereby expressly authorized to disregard any and all warnings
     given by any of the parties hereto or by any other person or Company,
     excepting only orders or process of courts of law, and are hereby expressly
     authorized to comply with and obey orders, judgments or decrees of any
     court. In case you obey or comply with any such order, judgment or decree
     of any court, you shall not be liable to any of the parties hereto or to
     any other person, firm or Company by reason of such compliance,
     notwithstanding any such order, judgment or decree being subsequently
     reversed, modified, annulled, set aside, vacated or found to have been
     entered without jurisdiction.

8.        You shall not be liable in any respect on account of the identity,
     authority or rights of the parties executing or delivering or purporting to
     execute or deliver the Agreement or any documents or papers deposited or
     called for hereunder.


9.        You shall be entitled to employ such legal counsel and other experts
     as you may deem necessary properly to advise you in connection with your
     obligations hereunder and may rely upon the advice of such counsel.

10.       Your responsibilities as Escrow Agent hereunder shall terminate if you
     shall cease to be Secretary of the Company or if you shall resign by
     written notice to each party. In the event of any such termination, the
     Company shall appoint any officer of the Company as successor Escrow Agent.

11.       If you reasonably require other or further instruments in connection
     with these Joint Escrow Instructions or obligations in respect hereto, the
     necessary parties hereto shall join in furnishing such instruments.

12.       It is understood and agreed that should any dispute arise with respect
     to the delivery and/or ownership or right of possession of the securities
     held by you hereunder, you are authorized and directed to retain in your
     possession without liability to anyone all or any part of said securities
     until such dispute shall have been settled either by mutual written
     agreement of the parties concerned or by a final order, decree or judgment
     of a court of competent jurisdiction after the time for appeal has expired
     and no appeal has been perfected, but you shall be under no duty whatsoever
     to institute or defend any such proceedings.

13.       Any notice required or permitted hereunder shall be given in writing
     and shall be deemed effectively given upon personal delivery or upon
     deposit in the United States Post Office, by registered or certified mail
     with postage and fees prepaid, addressed to each of the other parties
     thereunto entitled at the following addresses, or at such other addresses
     as a party may designate by ten days' advance written notice to each of the
     other parties hereto.

                              COMPANY:  Cimaron Communications Corporation
                              200 Brickstone Square
                              Andover, MA 01810

                              HOLDER:   Notices to Holder shall be sent to the
                              address set forth below Holder's signature below.

                              ESCROW AGENT:
                              Secretary
                              Cimaron Communications Corporation
                              200 Brickstone Square
                              Andover, MA 01810


     By signing these Joint Escrow Instructions, you become a party hereto only
for the purpose of said Joint Escrow Instructions, and you do not become a party
to the Agreement.

     This instrument shall be binding upon and inure to the benefit of the
parties hereto and their respective successors and permitted assigns.


                              Very truly yours,


                              CIMARON COMMUNICATIONS
                              CORPORATION


                              By:_____________________________
                              Title:__________________________
                                      200 Brickstone Square
                                      Andover, MA 01810


                              HOLDER:


                              ________________________________
                              Name:___________________________
ESCROW AGENT:                 Address:________________________
                                      ________________________
________________________      Date Signed: ___________________


                      Cimaron Communications Corporation
                       Incentive Stock Option Agreement
                    Granted Under 1998 Stock Incentive Plan
                    ---------------------------------------



1.   Grant of Option.
     ---------------

This agreement evidences the grant by Cimaron Communications Corporation, a
Delaware corporation (the "Company") on GRANT DATE (the "Grant Date") to NAME
(the "Participant"), an employee of the Company, of an option to purchase, in
whole or in part, on the terms provided herein and in the Company's 1998 Stock
Incentive Plan (the "Plan"), a total of NUMBER shares of common stock (the
"Shares"), $.001 par value per share, of the Company ("Common Stock") at $PRICE
per Share. Unless earlier terminated, this option shall expire ten years from
the Grant Date (the "Final Exercise Date").

It is intended that the option evidenced by this agreement shall be an incentive
stock option as defined in Section 422 of the Internal Revenue Code of 1986, as
amended and any regulations promulgated thereunder (the "Code"). Except as
otherwise indicated by the context, the term "Participant", as used in this
option, shall be deemed to include any person who acquires the right to exercise
this option validly under its terms.

2.   Vesting Schedule.
     ----------------

The date to be used for determining vesting of this option ("Vesting Effective
Date") shall be HIRE DATE. This option will become exercisable ("vest") as to
20% of the original number of Shares on the first anniversary of the Vesting
Effective Date and as to an additional 5% of the original number of Shares at
the end of each successive full three-month period following the first
anniversary of the Vesting Effective Date until the fifth anniversary of the
Vesting Effective Date. This option shall expire upon, and will not be
exercisable after, the Final Exercise Date.

The right of exercise shall be cumulative so that to the extent the option is
not exercised in any period to the maximum extent permissible it shall continue
to be exercisable, in whole or in part, with respect to all shares for which it
is vested until the earlier of the Final Exercise Date or the termination of
this option under Section 3 hereof or the Plan.

Notwithstanding the foregoing, in the event of an Acquisition of the Company (as
defined below), the number of Shares for which the option is vested shall,
immediately prior to the Closing of the Acquisition, be increased by (i) 20% of
the original number of Shares covered by this option, if the Participant has
been employed by the Company for 12 or more months prior to the Acquisition, or
(ii) 10% of the original number of Shares covered by this option, if the
Participant has been employed by the Company for less than 12 months prior to
the Acquisition. The remaining unvested shares shall vest in accordance with
their original vesting schedule, except that such schedule shall be shortened by
12 months (in the case of an acceleration under clause (i) above) or six months
(in the case of an acceleration under clause (ii) above).

"Acquisition" shall mean (i) the consolidation or merger of the Company (other
than a merger to reincorporate the Corporation in a different jurisdiction) into
or with any other entity or entities in which the shares of the Corporation
outstanding immediately prior to the closing of such event represent or are
converted into shares of


the surviving or resulting entity that represent less than a majority of the
total number of shares of the surviving or resulting entity that are outstanding
or are reserved for issuance upon the exercise or conversion of outstanding


securities immediately after the closing of such event, or (ii) the sale or
transfer of fifty percent (50%) or more of the capital stock of the Corporation
in a single transaction or series of related transactions or (iii) the sale of
all or substantially all of the assets of the Company.


3.   Exercise of Option.
     ------------------

     (a)  Form of Exercise. Each election to exercise this option shall be in
          ----------------
          writing, signed by the Participant, and received by the Company at its
          principal office, accompanied by this agreement, and payment in full
          in the manner provided in the Plan. The Participant may purchase less
          than the number of shares covered hereby, provided that no partial
          exercise of this option may be for any fractional share or for fewer
          than ten whole shares.

     (b)  Continuous Relationship with the Company Required. Except as otherwise
          -------------------------------------------------
          provided in this Section 3, this option may not be exercised unless
          the Participant, at the time he or she exercises this option, is, and
          has been at all times since the Grant Date, an employee, officer or
          director of, or consultant or advisor to, the Company or any parent or
          subsidiary of the Company as defined in Section 424(e) or (1) of the
          Code (an "Eligible Participant").

     (c)  Termination of Relationship with the Company. If the Participant
          --------------------------------------------
          ceases to be an Eligible Participant for any reason, then, except as
          provided in paragraphs (d) and (e) below, the right to exercise this
          option shall terminate three months after such cessation (but in no
          event after the Final Exercise Date), provided that this option shall
                                                -------- ----
          be exercisable only to the extent that the Participant was entitled to
          exercise this option on the date of such cessation. Notwithstanding
          the foregoing, if the Participant, prior to the Final Exercise Date,
          violates the non-competition or confidentiality provisions of any
          employment contract, confidentiality and nondisclosure agreement or
          other agreement between the Participant and the Company, the right to
          exercise this option shall terminate immediately upon written notice
          to the Participant from the Company describing such violation.

     (d)  Exercise Period Upon Death or Disability. If the Participant dies or
          ----------------------------------------
          becomes disabled (within the meaning of Section 22(e)(3) of the Code)
          prior to the Final Exercise Date while he or she is an Eligible
          Participant and the Company has not terminated such relationship for
          "cause" as specified in paragraph (e) below, this option shall be
          exercisable, within the period of one year following the date of death
          or disability of the Participant by the Participant, provided that
                                                               -------- ----
          this option shall be exercisable only to the extent that this option
          was exercisable by the Participant on the date of his or her death or
          disability, and further provided that this option shall not be
          exercisable after the Final Exercise Date.

     (e)  Discharge for Cause. If the Participant, prior to the Final Exercise
          -------------------
          Date, is discharged by the Company for "cause" (as defined below), the
          right to exercise this option shall terminate immediately upon the
          effective date of such discharge. "Cause" shall mean willful
          misconduct by the Participant or willful failure by the Participant to
          perform his or her responsibilities to the Company (including, without
          limitation, breach by the Participant of any provision of any
          employment, consulting, advisory, nondisclosure, non-competition or
          other similar agreement between the Participant and the Company), as
          determined by the Company, which determination shall be conclusive.
          The Participant


          shall be considered to have been discharged for "Cause" if the Company
          determines, within 30 days after the Participant's resignation, that
          discharge for cause was warranted.


4.   Right of First Refusal.
     ----------------------

     (a)  If the Participant proposes to sell, assign, transfer, pledge,
          hypothecate or otherwise dispose of, by operation of law or otherwise
          (collectively, "transfer") any Shares acquired upon exercise of this
          option, then the Participant shall first give written notice of the
          proposed transfer (the "Transfer Notice") to the Company. The Transfer
          Notice shall name the proposed transferee and state the number of such
          Shares the Participant proposes to transfer (the "Offered Shares"),
          the price per share and all other material terms and conditions of the
          transfer.

     (b)  For 30 days following its receipt of such Transfer Notice, the Company
          shall have the option to purchase all (but not less than all) of the
          Offered Shares at the price and upon the terms set forth in the
          Transfer Notice. In the event the Company elects to purchase all of
          the Offered Shares, it shall give written notice of such election to
          the Participant within such 30-day period. Within 10 days after his
          receipt of such notice, the Participant shall tender to the Company at
          its principal offices the certificate or certificates representing the
          Offered Shares, duly endorsed in blank by the Participant or with duly
          endorsed stock powers attached thereto, all in a form suitable for
          transfer of the Offered Shares to the Company. Promptly following
          receipt of such certificate or certificates, the Company shall deliver
          or mail to the Participant a check in payment of the purchase price
          for the Offered Shares; provided that if the terms of payment set
                                  -------- ----
          forth in the Transfer Notice were other than cash against delivery,
          the Company may pay for the Offered Shares on the same terms and
          conditions as were set forth in the Transfer Notice.

     (c)  At and after the time at which the Offered Shares are required to be
          delivered to the Company for transfer to the Company pursuant to
          subsection (b) above, the Company shall not pay any dividend to the
          Participant on account of such Shares or permit the Participant to
          exercise any of the privileges or rights of a stockholder with respect
          to such Offered Shares, but shall, in so far as permitted by law,
          treat the Company as the owner of such Offered Shares.

     (d)  If the Company does not elect to acquire all of the Offered Shares,
          the Participant may, within the 30-day period following the expiration
          of the option granted to the Company under subsection (b) above,
          transfer the Offered Shares to the proposed transferee, provided that
                                                                  -------- ----
          such transfer shall not be on terms and conditions more favorable to
          the transferee than those contained in the Transfer Notice.
          Notwithstanding any of the above, all Offered Shares transferred
          pursuant to this Section 4 shall remain subject to the right of first
          refusal set forth in this Section 4 and such transferee shall, as a
          condition to such transfer, deliver to the Company a written
          instrument confirming that such transferee shall be bound by all of
          the terms and conditions of this Section 4.

     (e)  The following transactions shall be exempt from the provisions of this
          Section 4:

          (1)  any transfer of Shares to or for the benefit of any parent,
               spouse, child or grandchild of the Participant, or to a trust for
               their benefit;

          (2)  any transfer pursuant to an effective registration statement
               filed by the Company under the Securities Act of 1933, as amended
               (the "Securities Act"); and


          (3)  any transfer of the Shares pursuant to the sale of all or
               substantially all of the business of the Company;


          provided, however, that in the case of a transfer pursuant to
          --------- -------
          clause (1) above, such Shares shall remain subject to the right
          of first refusal set forth in this Section 4 and such transferee
          shall, as a condition to such transfer, deliver to the Company a
          written instrument confirming that such transferee shall be bound
          by all of the terms and conditions of this Section 4.

     (f)  The Company may assign its rights to purchase Offered Shares in any
          particular transaction under this Section 4 to one or more persons or
          entities.

     (g)  The provisions of this Section 4 shall terminate upon the earlier of
          the following events:

          (1)  the closing of the sale of shares of Common Stock in an
               underwritten public offering pursuant to an effective
               registration statement filed by the Company under the Securities
               Act at a price to the public of at least $5.00 per share (subject
               to appropriate adjustments for stock splits, stock dividends,
               combinations and other similar recapitalizations affecting such
               shares) resulting in gross proceeds to the Company of at least
               $10,000,000; or

          (2)  an Acquisition.

     (h)  The Company shall not be required (a) to transfer on its books any of
          the Shares which shall have been sold or transferred in violation of
          any of the provisions set forth in this Section 4, or (b) to treat as
          owner of such Shares or to pay dividends to any transferee to whom any
          such Shares shall have been so sold or transferred.

5.   Agreement in Connection with Public Offering.
     --------------------------------------------

The Participant agrees, in connection with the initial underwritten public
offering of the Company's securities pursuant to a registration statement under
the Securities Act, (i) not to sell, make short sale of, loan, grant any options
for the purchase of, or otherwise dispose of any shares of Common Stock held by
the Participant (other than those shares included in the offering) without the
prior written consent of the Company or the underwriters managing such initial
underwritten public offering of the Company's securities for a period of 180
days from the effective date of such registration statement, and (ii) to execute
any agreement reflecting clause (i) above as may be requested by the Company or
the managing underwriters at the time of such offering.

6.   Withholding.
     -----------

No Shares will be issued pursuant to the exercise of this option unless and
until the Participant pays to the Company, or makes provision satisfactory to
the Company for payment of, any federal, state or local withholding taxes
required by law to be withheld in respect of this option. The participant may
provide for the payment of withholding taxes with shares of Common Stock.


7.   Nontransferability of Option.
     ----------------------------

This option may not be sold, assigned, transferred, pledged or otherwise
encumbered by the Participant, either voluntarily or by operation of law, except
by will or the laws of descent and distribution, and, during the lifetime of the
Participant, this option shall be exercisable only by the Participant.

8.   Disqualifying Disposition.
     -------------------------

If the Participant disposes of Shares acquired upon exercise of this option
within two years from the Grant Date or one year after such Shares were acquired
pursuant to exercise of this option, the Participant shall notify the Company in
writing of such disposition.

9.   Provisions of the Plan.
     ----------------------

This option is subject to the provisions of the Plan, a copy of which is
furnished to the Participant with this option.

     IN WITNESS WHEREOF, the Company has caused this option to be executed under
its corporate seal by its duly authorized officer. This option shall take effect
as a sealed instrument.


                              CIMARON COMMUNICATIONS CORPORATION


Dated: ________________       By:  _____________________

                              Name:  Ram Sudireddy

                              Title: President & CEO



                            PARTICIPANTS ACCEPTANCE

The undersigned hereby accepts the foregoing option and agrees to the terms and
conditions thereof. The undersigned hereby acknowledges receipt of a copy of the
Company's 1998 Stock Incentive Plan.



          PARTICIPANT:   ______________________________

               Address:  ______________________________

                         ______________________________


                      Cimaron Communications Corporation
                       Incentive Stock Option Agreement
                    Granted Under 1998 Stock Incentive Plan
                    ---------------------------------------

1.   Grant of Option.
     ---------------

This agreement evidences the grant by Cimaron Communications Corporation, a
Delaware corporation (the "Company") on GRANT DATE (the "Grant Date") to NAME
(the "Participant"), an employee of the Company, of an option to purchase, in
whole or in part, on the terms provided herein and in the Company's 1998 Stock
Incentive Plan (the "Plan"), a total of NUMBER shares of common stock (the
"Shares"), $.001 par value per share, of the Company ("Common Stock") at $PRICE
per Share. Unless earlier terminated, this option shall expire ten years from
the Grant Date (the "Final Exercise Date").

It is intended that the option evidenced by this agreement shall be an incentive
stock option as defined in Section 422 of the Internal Revenue Code of 1986, as
amended and any regulations promulgated thereunder (the "Code"). Except as
otherwise indicated by the context, the term "Participant", as used in this
option, shall be deemed to include any person who acquires the right to exercise
this option validly under its terms.

2.   Vesting Schedule.
     ----------------

The date to be used for determining vesting of this option ("Vesting Effective
Date") shall be HIRE DATE. This option will become exercisable ("vest") as to
20% of the original number of Shares on the first anniversary of the Vesting
Effective Date and as to an additional 5% of the original number of Shares at
the end of each successive full three-month period following the first
anniversary of the Vesting Effective Date until the fifth anniversary of the
Vesting Effective Date. This option shall expire upon, and will not be
exercisable after, the Final Exercise Date.

The right of exercise shall be cumulative so that to the extent the option is
not exercised in any period to the maximum extent permissible it shall continue
to be exercisable, in whole or in part, with respect to all shares for which it
is vested until the earlier of the Final Exercise Date or the termination of
this option under Section 3 hereof or the Plan.

     (a)  Notwithstanding the foregoing, in the event of an Acquisition of the
          Company (as defined below), the number of Shares for which the option
          is vested shall, immediately prior to the Closing of the Acquisition,
          be increased by (i) 20% of the original number of Shares covered by
          this option, if the Participant has been employed by the Company for
          12 or more months prior to the Acquisition, or (ii) 30% of the
          original number of Shares covered by this option, if the Participant
          has been employed by the Company for less than 12 months prior to the
          Acquisition. The remaining unvested shares shall vest in accordance
          with their original vesting schedule, except that such schedule shall
          be shortened by 12 months (in the case of an acceleration under clause
          (i) above) or 18 months (in the case of an acceleration under clause
          (ii) above), and further, if Participant's employment is terminated
          Without Cause (as defined below) prior to the first anniversary of the
          date of the Acquisition, 50% of such Participant's then remaining
          Unvested Shares shall become vested as of such date of termination.


     (b)  "Acquisition" shall mean (i) the consolidation or merger of the
          Company (other than a merger to reincorporate the Corporation in a
          different jurisdiction) into or with any other entity or entities in
          which the shares of the Corporation outstanding immediately prior to
          the closing of such event represent or are converted into shares of
          the surviving or resulting entity that represent less than a majority
          of the total number of shares of the surviving or resulting entity
          that are outstanding or are reserved for issuance upon the exercise or
          conversion of outstanding securities immediately after the closing of
          such event, or (ii) the sale or transfer of fifty percent (50%) or
          more of the capital stock of the Corporation in a single transaction
          or series of related transactions or (iii) the sale of all or
          substantially all of the assets of the Company.

3.   Exercise of Option.
     ------------------

     (a)  Form of Exercise. Each election to exercise this option shall be in
          ----------------
          writing, signed by the Participant, and received by the Company at its
          principal office, accompanied by this agreement, and payment in full
          in the manner provided in the Plan. The Participant may purchase less
          than the number of shares covered hereby, provided that no partial
          exercise of this option may be for any fractional share or for fewer
          than ten whole shares.

     (b)  Continuous Relationship with the Company Required. Except as otherwise
          -------------------------------------------------
          provided in this Section 3, this option may not be exercised unless
          the Participant, at the time he or she exercises this option, is, and
          has been at all times since the Grant Date, an employee, officer or
          director of, or consultant or advisor to, the Company or any parent or
          subsidiary of the Company as defined in Section 424(e) or (f) of the
          Code (an "Eligible Participant").

     (c)  Termination of Relationship with the Company. If the Participant
          --------------------------------------------
          ceases to be an Eligible Participant for any reason, then, except as
          provided in paragraphs (d) and (e) below, the right to exercise this
          option shall terminate three months after such cessation (but in no
          event after the Final Exercise Date), provided that this option shall
                                                -------- ----
          be exercisable only to the extent that the Participant was entitled to
          exercise this option on the date of such cessation. Notwithstanding
          the foregoing, if the Participant, prior to the Final Exercise Date,
          violates the non-competition or confidentiality provisions of any
          employment contract, confidentiality and nondisclosure agreement or
          other agreement between the Participant and the Company, the right to
          exercise this option shall terminate immediately upon written notice
          to the Participant from the Company describing such violation.

     (d)  Exercise Period Upon Death or Disability. If the Participant dies or
          ----------------------------------------
          becomes disabled (within the meaning of Section 22(e)(3) of the Code)
          prior to the Final Exercise Date while he or she is an Eligible
          Participant and the Company has not terminated such relationship for
          "cause" as specified in paragraph (e) below, this option shall be
          exercisable, within the period of one year following the date of death
          or disability of the Participant by the Participant, provided that
                                                               -------- ----
          this option shall be exercisable only to the extent that this option
          was exercisable by the Participant on the date of his or her death or
          disability, and further provided that this option shall not be
          exercisable after the Final Exercise Date.

     (e)  Discharge for Cause. If the Participant, prior to the Final Exercise
          -------------------
          Date, is discharged by the Company for "cause" (as defined below), the
          right to exercise this option shall terminate immediately upon the
          effective date of such discharge. "Cause" shall mean willful
          misconduct by the Participant or


          willful failure by the Participant to perform his or her
          responsibilities to the Company (including, without limitation, breach
          by the Participant of any provision of any employment, consulting,
          advisory, nondisclosure, non-competition or other similar agreement
          between the Participant and the Company), as determined by the
          Company, which determination shall be conclusive. The Participant
          shall be considered to have been discharged for "Cause" if the Company
          determines, within 30 days after the Participant's resignation, that
          discharge for cause was warranted.

4.   Right of First Refusal.
     ----------------------

     (a)  If the Participant proposes to sell, assign, transfer, pledge,
          hypothecate or otherwise dispose of, by operation of law or otherwise
          (collectively, "transfer") any Shares acquired upon exercise of this
          option, then the Participant shall first give written notice of the
          proposed transfer (the "Transfer Notice") to the Company. The Transfer
          Notice shall name the proposed transferee and state the number of such
          Shares the Participant proposes to transfer (the "Offered Shares"),
          the price per share and all other material terms and conditions of the
          transfer.

     (b)  For 30 days following its receipt of such Transfer Notice, the Company
          shall have the option to purchase all (but not less than all) of the
          Offered Shares at the price and upon the terms set forth in the
          Transfer Notice. In the event the Company elects to purchase all of
          the Offered Shares, it shall give written notice of such election to
          the Participant within such 30-day period. Within 10 days after his
          receipt of such notice, the Participant shall tender to the Company at
          its principal offices the certificate or certificates representing the
          Offered Shares, duly endorsed in blank by the Participant or with duly
          endorsed stock powers attached thereto, all in a form suitable for
          transfer of the Offered Shares to the Company. Promptly following
          receipt of such certificate or certificates, the Company shall deliver
          or mail to the Participant a check in payment of the purchase price
          for the Offered Shares; provided that if the terms of payment set
                                  -------- ----
          forth in the Transfer Notice were other than cash against delivery,
          the Company may pay for the Offered Shares on the same terms and
          conditions as were set forth in the Transfer Notice.

     (c)  At and after the time at which the Offered Shares are required to be
          delivered to the Company for transfer to the Company pursuant to
          subsection (b) above, the Company shall not pay any dividend to the
          Participant on account of such Shares or permit the Participant to
          exercise any of the privileges or rights of a stockholder with respect
          to such Offered Shares, but shall, in so far as permitted by law,
          treat the Company as the owner of such Offered Shares.

     (d)  If the Company does not elect to acquire all of the Offered Shares,
          the Participant may, within the 30-day period following the expiration
          of the option granted to the Company under subsection (b) above,
          transfer the Offered Shares to the proposed transferee, provided that
                                                                  -------- ----
          such transfer shall not be on terms and conditions more favorable to
          the transferee than those contained in the Transfer Notice.
          Notwithstanding any of the above, all Offered Shares transferred
          pursuant to this Section 4 shall remain subject to the right of first
          refusal set forth in this Section 4 and such transferee shall, as a
          condition to such transfer, deliver to the Company a written
          instrument confirming that such transferee shall be bound by all of
          the terms and conditions of this Section 4.

     (e)  The following transactions shall be exempt from the provisions of this
          Section 4:


     (1)  any transfer of Shares to or for the benefit of any parent, spouse,
          child or grandchild of the Participant, or to a trust for their
          benefit;

     (2)  any transfer pursuant to an effective registration statement filed by
          the Company under the Securities Act of 1933, as amended (the
          "Securities Act"); and

     (3)  any transfer of the Shares pursuant to the sale of all or
          substantially all of the business of the Company;

     provided, however, that in the case of a transfer pursuant to clause (1)
     --------- -------
     above, such Shares shall remain subject to the right of first refusal set
     forth in this Section 4 and such transferee shall, as a condition to such
     transfer, deliver to the Company a written instrument confirming that such
     transferee shall be bound by all of the terms and conditions of this
     Section 4.

     (f)  The Company may assign its rights to purchase Offered Shares in any
          particular transaction under this Section 4 to one or more persons or
          entities.

     (g)  The provisions of this Section 4 shall terminate upon the earlier of
          the following events:

          (1)  the closing of the sale of shares of Common Stock in an
               underwritten public offering pursuant to an effective
               registration statement filed by the Company under the Securities
               Act at a price to the public of at least $5.00 per share (subject
               to appropriate adjustments for stock splits, stock dividends,
               combinations and other similar recapitalizations affecting such
               shares) resulting in gross proceeds to the Company of at least
               $10,000,000; or

          (2)  an Acquisition.

     (h)  The Company shall not be required (a) to transfer on its books any of
          the Shares which shall have been sold or transferred in violation of
          any of the provisions set forth in this Section 4, or (b) to treat as
          owner of such Shares or to pay dividends to any transferee to whom any
          such Shares shall have been so sold or transferred.

5.   Agreement in Connection with Public Offering.
     --------------------------------------------

The Participant agrees, in connection with the initial underwritten public
offering of the Company's securities pursuant to a registration statement under
the Securities Act, (i) not to sell, make short sale of, loan, grant any options
for the purchase of, or otherwise dispose of any shares of Common Stock held by
the Participant (other than those shares included in the offering) without the
prior written consent of the Company or the underwriters managing such initial
underwritten public offering of the Company's securities for a period of 180
days from the effective date of such registration statement, and (ii) to execute
any agreement reflecting clause (i) above as may be requested by the Company or
the managing underwriters at the time of such offering.


6.   Withholding.
     -----------

No Shares will be issued pursuant to the exercise of this option unless and
until the Participant pays to the Company, or makes provision satisfactory to
the Company for payment of, any federal, state or local withholding taxes
required by law to be withheld in respect of this option. The participant may
provide for the payment of withholding taxes with shares of Common Stock.

7.   Nontransferability of Option.
     ----------------------------

This option may not be sold, assigned, transferred, pledged or otherwise
encumbered by the Participant, either voluntarily or by operation of law, except
by will or the laws of descent and distribution, and, during the lifetime of the
Participant, this option shall be exercisable only by the Participant.

8.   Disqualifying Disposition.
     -------------------------

If the Participant disposes of Shares acquired upon exercise of this option
within two years from the Grant Date or one year after such Shares were acquired
pursuant to exercise of this option, the Participant shall notify the Company in
writing of such disposition.

9.   Provisions of the Plan.
     ----------------------

This option is subject to the provisions of the Plan, a copy of which is
furnished to the Participant with this option.


     IN WITNESS WHEREOF, the Company has caused this option to be executed under
its corporate seal by its duly authorized officer. This option shall take effect
as a sealed instrument.


                              CIMARON COMMUNICATIONS CORPORATION


Dated: ________________       By:  _____________________

                              Name:  Ram Sudireddy

                              Title: President & CEO



                            PARTICIPANTS ACCEPTANCE


The undersigned hereby accepts the foregoing option and agrees to the terms and
conditions thereof. The undersigned hereby acknowledges receipt of a copy of the
Company's 1998 Stock Incentive Plan.



          PARTICIPANT:   ______________________________

               Address:  ______________________________

                         ______________________________