CROSSCOMM CORP
10-K405/A, 1996-12-05
COMPUTER COMMUNICATIONS EQUIPMENT
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<PAGE>   1


                          SECURITIES AND EXCHANGE COMMISSION
                                 Washington, DC 20549

                                     FORM 10-K/A

           
        [x]     ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                SECURITIES EXCHANGE ACT OF 1934 (FEE REQUIRED)

                    For the Fiscal Year Ended December 31, 1995
           
        [ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

                           Commission File Number 0-20110

                                CROSSCOMM CORPORATION
                (Exact name of registrant as specified in its charter)

                   DELAWARE                                52-1513201
      (State or other jurisdiction of            (I.R.S. Employer I.D. No.)
       incorporation or organization)

            450 DONALD LYNCH BOULEVARD, MARLBOROUGH, MASSACHUSETTS  01752
                       (Address of principal executive offices)

                                    (508) 481-4060
                 (Registrant's telephone number, including area code)

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

             Securities registered pursuant to Section 12(b) of the Act:
                                         NONE

             Securities registered pursuant to Section 12(g) of the Act:
                        COMMON STOCK, PAR VALUE $.01 PER SHARE
                                   (Title of class)

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

      Indicate by check mark whether registrant:  (1) has filed all reports
      required to be filed by Section 13 or 15(d) of the Securities Exchange
      Act of 1934 during the preceding 12 months (or for such shorter period
      that the registrant was required to file such reports) and (2) has been
      subject to such filing requirements for the past 90 days. YES  X   NO    
                                                                    ---    ---

      Indicate by check mark if disclosure of delinquent filers pursuant to
      Item 405 of Regulation S-K is not contained herein, and will not be
      contained, to the best of the registrant's knowledge, in definitive proxy
      or information statements incorporated by reference in Part III of this
      Form 10-K or any amendment to this Form 10-K. YES  X   NO    
                                                        ---    ---

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

      The aggregate market value of voting stock held by non-affiliates of the
      registrant as of February 26, 1996 was approximately $80,820,000.

      The number of shares outstanding of the Common Stock, $.01 par value per
      share, on February 26, 1996 was 9,153,857.

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

<PAGE>   2


      PART IV - OTHER INFORMATION


      Item 14.  Exhibits, Financial Statements and Reports on Form 8-K.

              (a)  Exhibits.

                   The exhibits filed as part of this Form 10-K/A are listed on
                   the Exhibit Index immediately preceding such exhibits, which
                   Exhibit Index is incorporated herein by reference.

              (b)  Reports on Form 8-K.

                   None. 








                                         -2-

<PAGE>   3



                                      SIGNATURES


              Pursuant to the requirements of Section 13 or 15(d) of the
      Securities Exchange Act of 1934, the Registrant has duly caused this
      report to be signed on its behalf by the undersigned thereunto duly
      authorized.


                                            CROSSCOMM CORPORATION



      Date:  December 5, 1996               By: /s/ Douglas G. Bryant
                                                --------------------------------
                                                Douglas G. Bryant
                                                 Chief Financial Officer







                                         -3-

<PAGE>   4


                                    EXHIBIT INDEX
                                    -------------


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

    3.1(1)         Amended and Restated Certificate of Incorporation of the
                   Company

    3.3(2)         By-Laws, as amended, of the Company

    4.1(2)         Specimen certificate representing shares of Common Stock,
                   $.01 par value, of the Company

    10.1(2)        Lease Agreement dated as of April 30, 1992 by and between
                   the Company and New England Mutual Life Insurance Company

    10.2(3)        First Amendment to Lease dated January 15, 1993 by and
                   between the Company and Cigna Investments, Inc.
                   (successor in interest to New England Mutual Life
                   Insurance Company)

    10.3(2)        Non-Competition Agreement date as of July 24, 1989
                   between the Company and Tadeusz Witkowicz

    10.4(2)        Loan Agreement for a revolving line of credit dated April
                   8, 1992 by and between the Company and Silicon Valley
                   Bank as Lender

    10.5(2)        Indemnification Agreement dated January 19, 1990 by and
                   between the Company and Tadeusz Witkowicz

    10.6(2)        Indemnification Agreement dated November 6, 1991 by and
                   between the Company and Nancy Casey

    10.7(2)        Indemnification Agreement dated January 19, 1990 by and
                   between the Company and Allan M. Kline

    10.8(2)        Indemnification Agreement dated January 19, 1990 by and
                   between the Company and Alexander M. Levine

    10.9(2)        Amended 1988 Incentive Stock Option Plan

    10.10(2)       Amended 1989 Incentive Stock Option Plan

    10.11(2)       1991 Incentive Stock Option Plan, as amended

    10.12(2)       1992 Stock Option Plan, as amended

    10.13(2)       1992 Directors' Option Plan

    10.14(2)       1992 Employee Stock Purchase Plan








                                         -4-

<PAGE>   5

    10.15(4)       Manufacturing Agreement dated as of April 21, 1993
                   between the Company and Lockheed Commercial Electronics
                   Company

    10.16**        1994 Stock Option Plan, as amended

    10.17(7)       Revolving Credit Agreement for a revolving line of credit
                   dated September 23, 1993 by and between the Company and
                   The First National Bank of Boston, as Lender

    10.18(5)#      Share Acquisition and Asset Purchase Agreement dated
                   March 31, 1994 by and between the Company and CrossComm
                   (UK) Limited and Tricom Group Ltd., Tricom Borer Ltd. and
                   Tricom Communications PLC.  

    10.19(6)#      Technology License and Manufacturing Agreement dated
                   July 14, 1994 by and between the Company and Multimedia
                   Communications, Inc.  

    10.20(6)#      Product Development, Technology License and Manufacturing
                   Agreement dated July 19, 1994 by and between the Company
                   and Applied Network Technology, Inc.

    10.21(7)       Offer of Employment Agreement dated June 17, 1994 by and
                   between the Company and Alain G. Daste

    10.22**        Amendment to Revolving Credit Agreement dated
                   November 29, 1995 by and between the Company and The
                   First National Bank of Boston

    10.23**        Loan Modification Agreement dated November 6, 1995 by and
                   between the Company and Silicon Valley Bank

    10.24(7)       Offer of Employment Agreement dated January 18, 1995 by
                   and between the Company and Allan M. Kline

    10.25(8)       Employee Retention Agreement dated March 9, 1995 by and
                   between the Company and Alain G. Daste

    10.26(9)       Employee Severance Agreement dated September 13, 1995 by
                   and between the Company and Allan M. Kline

    10.27*@        Amendment dated October 1, 1995 to Product Development,
                   Technology License and Manufacturing Agreement dated
                   July 19, 1994 by and between the Company and Applied
                   Network Technology, Inc.

    10.28**        Severance Agreement dated November 13, 1995 by and
                   between the Company and Alain G. Daste

    10.29**        Form of 1995 Employee Stock Purchase Plan

    11**           Statement Regarding Computation of Per Share Earnings
                   (Loss)






                                         -5-
<PAGE>   6

    21**           Subsidiaries of the Company

    23**           Consent of Ernst & Young LLP

    ______________________________

    *       Filed herewith

    **      Previously filed

    @       Confidential treatment requested as to certain portions thereof

    #       Confidential treatment granted as to certain portions thereof

    (1)     Incorporated by reference to the Company's Registration
            Statement on Form S-8 (No. 33-82476), as filed with the
            Securities and Exchange Commission on August 5, 1994

    (2)     Incorporated by reference to the Company's Registration
            Statement on Form S-1 (No. 33-47321), as filed with the
            Securities and Exchange Commission on April 20, 1992 and amended
            on May 27, 1992, June 3, 1992 and June 12, 1992

    (3)     Incorporated by reference to the Company's Registration
            Statement on Form S-1 (No. 33-59700), as filed with the
            Securities and Exchange Commission on March 18, 1993

    (4)     Incorporated by reference to the Company's Form 10-Q for the
            quarter ended June 30, 1993, as filed with the Securities and
            Exchange Commission on August 16, 1993

    (5)     Incorporated by reference to the Company's Form 10-Q for the
            quarter ended March 31, 1994, as filed with the Securities and
            Exchange Commission on May 16, 1994

    (6)     Incorporated by reference to the Company's Form 10-Q for the
            quarter ended September 30, 1994, as filed with the Securities
            and Exchange Commission on November 14, 1994

    (7)     Incorporated by reference to the Company's Form 10-K for the
            year ended December 31, 1994, as filed with the Securities and
            Exchange Commission on March 30, 1995

    (8)     Incorporated by reference to the Company's Form 10-Q for the
            quarter ended June 30, 1995, as filed with the Securities and
            Exchange Commission on August 20, 1995

    (9)     Incorporated by reference to the Company's Form 10-Q for the
            quarter ended September 30, 1995, as filed with the Securities
            and Exchange Commission on November 13, 1995










                                         -6-

<PAGE>   1







               CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
              SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.


                                  AMENDMENT NUMBER 1

              Amendment, dated as of October 1, 1995, by and between
         CrossComm Corporation, a Delaware corporation having an office at
         450 Donald Lynch Boulevard, Marlboro, Massachusetts  01752
         ("CrossComm") and Applied Network Technology, Inc., a Massachusetts
         corporation having an office at Regency Park, 238 Littleton Road,
         Westford, MA  01886 ("ANT")

              WHEREAS, Crosscomm and ANT are parties to a certain Product
         Development, Technology License and Manufacturing Agreement dated
         July 19, 1994 (the "Agreement") to which reference is hereby made;
         capitalized terms herein shall have the same meanings ascribed to
         them in the Agreement; and 

              WHEREAS, Crosscomm and ANT desire to amend the Agreement in
         accordance with the terms and conditions set forth herein;

              NOW THEREFORE, CrossComm and ANT hereby agree, for good and
         valuable consideration, the receipt of which is hereby
         acknowledged, as follows:

         A.   AMENDMENTS TO AGREEMENT

              The parties agree to amend the Agreement as follows:

              1.   Delete the phrase "and the A Logic Chip" at the end of
         Section 1.3.

              2.   Add the following to the end of Section 1.4:

              "and all source code, libraries, design and technical
              documentation, flow charts, layouts, diagrams and other
              technical information in the possession of ANT relating to the
              design and operation of an ASIC."

              3.   Add the following phrase to the end of Section 1.12:

              "and the ESM 10-16, ESM 10-8 and EMCP daughter boards."

              4.   Add the following new section to the end of Section 1:

<PAGE>   2







              "1.25 STAND-ALONE BASIS means the sale of a product (or, in
              the context of this Agreement, an ASIC) as a separate
              commodity product, and not as part of or a component of
              another product, such as a network switch.  Sale on a Stand-
              alone Basis does not include sale of a product as a
              replacement part for a product originally sold or manufactured
              by the selling party (such as a network switch) into which the
              replacement part will be incorporated."

              5.   Delete the last paragraph of Section 2.2 ("CrossComm will
         own . . .under this Agreement.") in its entirety.

              6.   Add the following to the end of the first sentence of
         Section 2.4:

              "and (for the SEC 100 ASIC only) to determine whether the
              Deliverable is interoperable with the National Semiconductor
              NIC card, such interoperability to be defined as substantial
              completion of certain interoperability tests attached hereto,
              including 100 Base-T testing at a mutually acceptable,
              regional, recognized laboratory"

              7.   Add the following to line 6 of Section 2.4, after the
         word "criteria":

              "and (for the SEC 100 ASIC only) the Deliverable is
              interoperable with the National Semiconductor NIC card as
              aforesaid,"

              8.   Add the following to the end of Section 3.1:

              "Notwithstanding the foregoing, the ESM 10-16, ESM 10-8 and
              EMCP daughter boards shall be deemed to have been finally
              accepted by CrossComm upon Initial Product Acceptance, shall
              not be required to undergo Production Acceptance and, because
              they are owned by Crosscomm, shall not be subject to the
              provisions of Sections 5 or 15 hereof in any respect."

              9.   Add the following sentences to the end of Section 3.3:

              "CrossComm shall have the right to purchase each ASIC directly
              from LSI Logic Corporation or other ASIC vendors, provided
              that CrossComm notifies ANT (during the Maintenance Period (as
              defined in Section 5.1)) of the quantity, type and timing of
              such purchases within fifteen days following the end of the
              month in which such purchases were made.  All such information
              shall be deemed the Confidential Information of CrossComm."




                                         -2-
<PAGE>   3







               CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
              SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.

              10.  In Section 4.3(a), replace each reference to "********"
         with "********," and delete the last five lines in their entirety
         and replace them with the following:

              "SEC 10 and SEC 100 ** per ship for the first ****** chips
              ********"

              11.  Section 4.3(b) shall be restated in its entirety as
         follows:

              "The parties acknowledge and agree that the Prepaid Royalties
              are nonrefundable, and that no amounts previously paid or to
              be paid by CrossComm to ANT hereunder, once such amounts are
              paid, shall be refundable."

              12.  In Section 4.4, replace both occurrences of "January 1,
         1996" with "March 31, 1996".

              13.  Insert the following at the end of Section 4.4:

              "ANT may solicit such PBI ASIC business during the period from
              the execution date of this Agreement through March 31, 1996.
              Notwithstanding the foregoing or anything to the contrary in
              Section 6.2 or elsewhere in this Agreement, ANT shall not be
              prohibited from selling the PBI ASIC if it is incorporated
              into a networking product developed or sold by ANT or a
              parent, subsidiary or entity under common control with ANT (an
              "ANT Switch").

              14.  The title of Section 5 shall be changed to "Maintenance"
         and Section 5.1 shall be deleted in its entirety.

              15.  Section 5.2 shall be renumbered Section 5.1 and shall be
         restated in its entirety to read as follows:

              "During the time period commencing on the date hereto and
              ending on March 31, 1996 (the "Maintenance Period"), ANT will
              provide Maintenance Services to Crosscomm in respect of the
              SEC 10 (Rev C) and the PBI ASICs; the Maintenance Period for
              the SEC 100 ASIC shall end on May 15, 1996.  "Maintenance
              Services" means reasonable efforts by ANT to correct bugs and
              other non-conformities with existing specifications, and shall
              not include the addition of new features, functions or
              performance enhancements.  Notwithstanding anything to the




                                         -3-
<PAGE>   4







              contrary contained herein, ANT agrees that it shall, prior to
              December 31, 1995, deliver to CrossComm a revised PBI ASIC
              which corrects those errors set forth on Attachment B to this
              Amendment and which conforms to the Rev. 1.2 specifications
              dated October 16, 1995.

              The Maintenance Period with respect to the SEC 100 ASIC shall
              be extended until June 30, 1996 in the event that a working
              model which conforms to the Rev. 0.6 specifications dated July
              27, 1995 has not been delivered by ANT to CrossComm by
              December 31, 1995."

              16.  Delete Section 5.2 in its entirety.

              17.  Add the word "irrevocable" to the second line of Section
         6.1(a), after the word "perpetual".

              18.  Add the word "irrevocable" to the second line of Section
         6.1(b), after the word "perpetual".

              19.  Delete Section 6.1(c) and replace it with the following:

              "Upon the commencement of training under Section 15 of the
              Agreement, as amended, for each ASIC, but no later than the
              expiration of the Maintenance Period for each ASIC:

                   (i)  ANT shall provide CrossComm with the ASIC Design for
              that ASIC;

                   (ii) ANT shall grant, and shall be deemed hereby to have
              granted, to CrossComm a non-transferable, (except that
              CrossComm may assign the Agreement, as amended by this
              Amendment, and all of its rights and obligations hereunder, in
              connection with the sale or other transfer of all or
              substantially all of its assets or business related to the
              Agreement or other "change in control," as defined below,
              provided, however, that no such assignment may be made to one
              of the companies listed on Attachment A hereto), irrevocable,
              worldwide, royalty-free right and license (with the right to
              sublicense only to Crosscomm subsidiaries, parents, entities
              under common control with CrossComm and third party
              subcontractors who agree to be bound by obligations as to
              confidentiality no less restrictive than those contained
              herein) to install, store, read, modify, use, enhance and
              create derivative works of such ASIC Design for any purpose
              and to make, use, sell, have made, have used and have sold





                                         -4-
<PAGE>   5







              ASICs based in whole or in part on the ASIC Designs, under all
              Intellectual Property therein; provided, that CrossComm shall
              not sell or distribute ASICs incorporating or based
              principally or substantially on the ASIC Designs on a Stand-
              alone Basis, and provided further, that all licenses set forth
              in this Section 6.1(c)(ii) shall terminate immediately upon a
              "change of control" of CrossComm, which results in a company
              set forth on Attachment A having "control" of CrossComm.
              Forth the purposes hereof, a "change of control" shall mean
              the sale or other transfer of more than 50% of the outstanding
              stock or all or substantially all of the assets or business of
              CrossComm related to the Agreement, and "control" shall mean
              the ownership or voting control, whether direct or indirect,
              of more than 50% of the outstanding stock of CrossComm or to
              the entity owning all or substantially all of the assets or
              business of CrossComm related to the Agreement.  Immediately
              upon any change of control of Crosscomm which results in a
              company set forth on Attachment A having control of Crosscomm,
              Crosscomm (or such other company) shall immediately return to
              ANT the ASIC Designs and all other Proprietary Information of
              ANT (including all copies thereof), and the only right which
              CrossComm shall have with respect to ASIC Designs is the right
              to have corrected any errors or other failures of the ASICs to
              conform to applicable specifications by retaining a third
              party, unrelated to CrossComm or any parent, subsidiary or
              affiliate of CrossComm to make such correction (hereinafter
              referred to as the "Subcontractor"), provided that such
              Subcontractor executes a non-disclosure agreement in a form
              reasonably acceptable to ANT.  ANT agrees that, following the
              return to it of the ASIC Designs and other Proprietary
              Information referenced in the preceding sentence, it shall
              retain such ASIC Designs and Proprietary Information for a
              reasonable period of time, and shall provide the Subcontractor
              with access to, and a license to use, such portion of the ASIC
              Designs reasonably necessary to perform any required
              correction, for the limited and sole purpose of performing
              such correction."

              20.  Delete the second and third sentences of Section 6.1(a).

              21.  Delete the last two sentences of Section 6.2 in their
         entirety and add the following to the end of Section 6.2.

              "The pricing of ANT Switches will not be considered in such
              determination, and CrossComm acknowledges that the pricing of
              ANT Switches shall not be constrained hereby."





                                         -5-
<PAGE>   6








              22.  Delete the second and third sentences of the first
         paragraph of Section 6.4 and add a new subsection (ix) after
         subsection (viii) of Section 6.4:

              "(ix)     the EMCP daughter board"

              23.  Add the following to the end of Section 6.4.

              "CrossComm acknowledges that the SEC 10 and PBI ASICs which
              have been delivered by ANT do not include any CrossComm
              Specific Technology, and that the SEC 100 ASIC, if it is
              designed in conformance with the specifications referenced in
              Article B of this Amendment, is not intended to include any
              CrossComm Specific Technology."

              24.  Add a new Section 7.6 at the end of Section 7:

              "7.6 ASSIGNMENT.  ANT acknowledges and agrees that the ESM 10-
              16, ESM 10-8 and EMCP daughter boards which it developed for
              CrossComm for consideration of $80,000 were "works made for
              hire" under applicable copyright law, and that Crosscomm owns
              all right, title and interest in and to the ESM 10-16, ESM 10-
              8 and EMCP daughter boards and all Intellectual Property
              contained therein, other than any Core ANT Technology.  ANT
              hereby assigns to CrossComm all right, title and interest in
              and to the ESM 10-16, ESM 10-8 and EMCP daughter boards and
              all Intellectual Property therein, other than any Core ANT
              Technology.  ANT shall execute and deliver any and all
              assignments, instruments and documents requested by CrossComm
              to effectuate the foregoing assignment."

              25.  Add a new Section 7.7 at the end of Section 7:

              "7.7 OWNERSHIP OF DERIVATIVE WORKS.  ANT acknowledges that
              CrossComm shall own all intellectual property rights in any
              enhancements or modifications it may create in the SEC 10, PBI
              or SEC 100 ASICs, provided, however, that such ownership shall
              not affect in any way ANT's ownership of any intellectual
              property rights in the underlying ASICs to which such
              enhancements or modifications relate, and shall not confer
              upon Crosscomm any ownership rights in such ASICs."

                   26.  Delete Section 8 in its entirety.

                   27.  Delete Section 15 in its entirety and replace it
              with the following:




                                         -6-
<PAGE>   7







               CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
              SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.

                   "15. TRAINING

                   "15.1     TRAINING.  On such dates and at such times as
                   ANT and CrossComm may mutually agree (the agreement of
                   ANT not to be unreasonably withheld), ANT shall (at no
                   charge to CrossComm) provide "Training Services" (**
                   ***************************************************
                   ***************************************************
                   ***************************************************
                   *************************************************** 
                   *************************************************** 
                   *************************************************** 
                   *************************************************** 
                   ***********

         B.   OTHER AGREEMENTS

              1.   SEC 10 ASIC.  CrossComm acknowledges that the 0.6 micron
         version of the SEC 10 ASIC (the "Rev A SEC 10") has successfully
         passed Acceptance testing, and that ANT's obligation under the
         Agreement to achieve Initial Product Acceptance of the SEC 10 ASIC
         and all Ethernet Switch Modules based thereon has thereby been
         discharged.  Notwithstanding the foregoing, ANT has developed and
         delivered to CrossComm Rev B and Rev C versions of the SEC 10 ASIC
         for CrossComm's use in its products, and CrossComm acknowledges and
         agrees that ANT shall have no further obligation with respect to
         any version of the SEC 10 ASIC other than to provide Maintenance
         Services, pursuant to Section 5.1 hereof, with respect to the Rev C
         version of the SEC 10 ASIC during the Maintenance Period."

              2.   SEC 100 ASIC. The parties agree and acknowledge that the
         specifications for the SEC 100 ASIC shall be the specifications
         known as "Rev. 0.6" dated July 27, 1995.

              3.   CROSSCOMM AND ITS AFFILIATES.  Any reference in the
         Agreement to CrossComm shall include CrossComm and any "affiliate"
         of CrossComm, unless such affiliate is a company set forth on
         Attachment A.  For the purposes hereof, an "affiliate" is a company
         controlling, controlled by, or under common control with,
         CrossComm.

              4.   EXHIBIT F-1.  Exhibit F to the Agreement shall be
         replaced in its entirety by Exhibit F-1 attached hereto.





                                         -7-
<PAGE>   8








              5.   TECHNICAL SUPPORT AGREEMENT.  CrossComm agrees that the
         Technical Support Agreement dated October 21, 1994 by and among
         CrossComm, ANT, Willem A.H. Engelse and David R. Paolino is hereby
         terminated and that no party thereto shall have any obligation or
         liability thereunder.

              6.   ESCROW AGREEMENT.  CrossComm agrees that the Escrow
         Agreement dated July 12, 1994 by and among CrossComm, ANT and Data
         Securities International, Inc. is hereby terminated and that no
         party thereto shall have any obligation or liability thereunder.

              7.   NO OTHER EFFECT.  Except as stated in this Amendment, all
         provisions of the agreement shall remain in full force and effect.

              IN WITNESS WHEREOF, the parties have duly executed this
         Amendment as an instrument under seal as of the date first written
         above.

         CROSSCOMM CORPORATION         APPLIED NETWORK TECHNOLOGY, INC.


         By:_______________________    By:_____________________________


         Name:_____________________    Name:___________________________


         Title:____________________    Title:__________________________







                                         -8-
<PAGE>   9







                                     ATTACHMENT A
                                     ------------

         Cisco Systems, Inc.
         3Com Corporation
         Newbridge Networks Corporation
         Bay Networks, Inc.
         International Business Machines Corporation
         General DataComm Corporation








                                         -9-
<PAGE>   10







               CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
              SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.


                                  ATTACHMENT B
                                  ------------

         ************************************************************
         ************************************************************
         ************************************************************
         ************************************************************
         ************************************************************
         *****************************







                                        -10-
<PAGE>   11





<TABLE>
                           CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
                         SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.


                                                   Exhibit F-1

                              Revised Summary Payment Matrix Dated October 1, 1995
<CAPTION>

                                                                         Nature of Payment
Original    Actual    Expected                       ----------------------------------------------------------
Due         Check     Revised                                   License    Prepaid   PBI ASIC
Date        Date      Ck. Date       Deliverable       NRE      Fee        Royalty   Exclusivity Fee     TOTAL
- --------    ------    --------    ------------------

<S>         <C>                   <C>                <C>       <C>         <C>          <C>            <C>
7/19/94     7/19/94               Agreement Signed   *******   *******     $            $              ********

N/A         1/04/95               ESM 10-16, 10-8
                                  and EM-CP net
                                  management module
                                  and development
                                  through initial
                                  Product Acceptance
                                                      ******                                             ******

10/7/94     1/04/95               Design Simulation
                                  Acceptance of
                                  SEC 10 and PBI               *******      *******
                                  ASICs                                                                 *******

12/5/94     3/03/95               Initial Product
                                  Acceptance of ESM
                                  10-14 and 10-2
                                  including                                   ******     ******         *******
                                  management
                                  software

12/30/94    4/22/95               Final Product
                                  Acceptance of ESM
                                  10-14 and 10-2                              ******                     ******

12/30/94    4/25/95               Final Product
                                  Acceptance of ESM
                                  10-14 and 10-2
                                  (follow-on payment
                                  due to 4/22/95                               *****                      *****
                                  check error)
</TABLE>

<PAGE>   12
<TABLE>
                           CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE
                         SECURITIES AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.
<CAPTION>

                                                                         Nature of Payment
Original    Actual    Expected                       ----------------------------------------------------------
Due         Check     Revised                                   License    Prepaid   PBI ASIC
Date        Date      Ck. Date       Deliverable       NRE      Fee        Royalty   Exclusivity Fee     TOTAL
- --------    ------    --------    ------------------

<S>                   <C>         <C>                <C>      <C>          <C>          <C>            <C>
10/7/94               10/5/95     Design Simulation
                                  Acceptance of SEC
                                  100 ASIC                                  ******                       ******

2/20/94               N/A         Production
                                  Acceptance of ESM
                                  10-14 and 10-2,
                                  using REV A of SEC       *        *            *            *               *
                                  10 ASIC

12/30/94              10/31/95    Initial Product                           ******                       ******
                                  Acceptance of ESM
                                  100-2, including
                                  management
                                  software and
                                  backplane
                                  interface
1/20/95               11/10/95    Final Product
                                  Acceptance of ESM
                                  100-2                                     ******       ******          ******

2/20/95               12/8/95     Production
                                  Acceptance ESM                           *******
                                  100-2                                                                 *******

NA                    NA          WAIVED                                         *                            *

12/31/95              12/31/95    End of PBI Chip
                                  Exclusivity Term

                                                                                         ******          ******
                                                     *******  *******       ******      *******        ********
                                                     ==========================================================
</TABLE>







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