Exhibit 10.20

                        LICENSE AND DEVELOPMENT AGREEMENT

         This Software License and Development Agreement (the "Agreement") is
entered into as of this ____ day of December, 1999 (the "Effective Date") by and
between Philips Semiconductors Inc., a Delaware corporation having its principal
place of business at 811 East Arques Avenue, Sunnyvale, CA 94088-3409,
(hereinafter "PHILIPS"), and Phasecom Ltd., an Israeli corporation, having its
principal place of business at 11 Kiriat Hamada Street, Bldg. 6, 1st Floor, Har
Hotzvim 91450, Jerusalem, ISRAEL ("PCOM"), a wholly owned subsidiary of Phasecom
Inc., a Delaware corporation, with its principle place of business at 20400
Stevens Creek Blvd., 8th Floor, Cupertino, CA 95014 ("PHASECOM INC"). (PHILIPS,
PCOM and PHASECOM INC. are occasionally referred to herein individually as a
"Party" and collectively as the "Parties.")

         WHEREAS, PCOM has developed a DOCSIS MAC including both hardware and
software (as defined below) that is compliant to the version 1.0 MAC standard;

         WHEREAS, PCOM is developing a DOSIS MAC including both hardware and
software that will be compliant to the versions 1.1 MAC standard;

         WHEREAS, PHILIPS desires to license such a DOSIS MAC including both
hardware and software from PCOM under the terms and conditions of this Agreement
for use as part of its integrated circuit products;

         WHEREAS, PCOM desires to provide and license to PHILIPS such DOCSIS MAC
under the terms and conditions of this Agreement;

         WHEREFORE, in consideration of the mutual promises hereinafter set
forth, PHILIPS and PCOM and PHASECOM INC. agree as follows:


1.0    DEFINITIONS.

As used in this Agreement, the following capitalized terms shall have the stated
meanings:

1.1      "Affiliates" of a Party means any corporation, company or other entity
         which directly or indirectly controls, is controlled by, or is under
         common control with such Party. An entity shall be regarded as in
         control of another so long as it owns or controls, directly or
         indirectly, more than fifty percent (50%) of the shares entitled to
         vote for the election of directors or other person performing similar
         functions.

 .
1.2      "Application Specific Product" means products whose architecture are
optimized for use in particular applications and whose components may include
both hardware and software.


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1.3      "Customer Specific Product " means products made for a specific
         customer or set of customers which may include both hardware and
         software and intellectual property from various sources.

1.4      "Derivative Works" means a work based on one or more preexisting works,
         such as a translation, arrangement, abridgement, condensation,
         expansion, compilation, revision, or any other form in which a work may
         be recast, transformed, or adapted, and as further defined by 17 U.S.C.
         Sec. 101.

1.5      "DOCSIS MAC" means the Media Access Controller, whose specification is
         defined under the DOCSIS standards committee including both hardware
         and software, that is provided by PCOM to PHILIPS under this Agreement,
         as further defined in Exhibit A and the Statement of Work herein. The
         term DOCSIS MAC shall include the PCOM DOCSIS 1.0 MAC, the PCOM DOCSIS
         1.1 MAC and, subject to the provisions of Article 4 herein, the PCOM
         DOCSIS 1.2 MAC that are provided by PCOM to PHILIPS under this
         Agreement.

1.6      "DOCSIS 1.0 MAC" means Media Access Controller whose specifications are
         defined under the DOCSIS standards committee for the 1.0 MAC standard.

1.7      "DOCSIS 1.1 MAC" means Media Access Controller whose specifications are
         defined under the DOCSIS standards committee for the 1.1 MAC standard.

1.8      "DOCSIS 1.2 MAC" means Media Access Controller whose specifications are
         defined under the DOCSIS standards committee for the 1.2 MAC standard.

1.9      "Documentation" means User Documentation and Source Documentation.
         "User Documentation" means user manuals and other written works that
         are designed to explain for the end user the installation and use of
         particular object code. "Source Documentation" means source code
         comments and other works describing the internal structure and
         operation of particular source code, including, but not limited to all
         related specifications, schematics, logic manuals, flow charts, and
         principals of operation, related build procedures, test harnesses, test
         procedures, bug data base and design documentation, as available.
         Documentation may be in tangible form or machine-readable text or
         graphic files subject to display or printout.

1.10     "Licensed Rights" means any patents, copyrights, maskwork rights,
         know-how and trade secrets or other legally protectable information
         which read upon, are embodied in, or otherwise apply to the DOCSIS MAC.

1.11     "PCOM DOCSIS 1.0 MAC" means the DOCSIS 1.0 MAC that is provided by PCOM
         to PHILIPS under this Agreement.

1.12     "PCOM DOCSIS 1.1 MAC" means the DOCSIS 1.1 MAC that is provided by PCOM
         to PHILIPS under this Agreement.


                                       2



1.13     "Product" or "Products" means any integrated circuit product made by or
         for PHILIPS and/or its Affiliates, including but not limited to DOCSIS
         Customer Specific Products or Application Specific Products for cable
         modem and cable set top box applications, provided however the terms
         Product and Products shall not include any integrated circuit product
         that uses the DOCSIS MAC for a Wireless Communications Application.

1.14     "Source Code" means all source files for both the generation of a
         hardware block and for the generation of software used to run the
         hardware block.

1.15     "Wireless Communications Application" means an application whose
         primary data transfer is accomplished by using "Wireless" medium,
         provided, however, the term Wireless Communications Application shall
         not include any wireless applications where the primary communications
         gateway is provided via cable. By way of example, the term "Wireless
         Communication Application" shall not include applications where data is
         distributed by wireless means in a local environment after transfer
         across a cable.

2.0   DOCSIS MAC DELIVERY.

2.1      Upon the signing of this Agreement PCOM shall deliver to PHILIPS the
         PCOM DOCSIS 1.0 MAC Deliverables, as set forth in Exhibit A.

2.2      PCOM agrees to deliver to PHILIPS the PCOM DOCSIS 1.1 MAC Deliverables
         in accordance with the Specifications and schedule set forth in Exhibit
         B.


3.0    ACCEPTANCE OF DELIVERABLES.

Acceptance of deliverables shall be defined as follows:

3.1      PHILIPS will examine and test each Deliverable upon delivery to
         determine whether the Deliverable conforms to the Specifications for
         such Deliverable. Within ten (10) business days after such delivery,
         PHILIPS shall provide PCOM with written acceptance of such Deliverable
         or a written statement of Errors. As used herein, "Errors" means: (i)
         defects in the Deliverable which cause it not to operate in conformance
         with the Specification: (ii) defects in the documentation which render
         it inaccurate, erroneous, or otherwise unreadable; or (iii) any aspect
         of any Deliverable which fails to conform to the Specification.

3.2      PCOM shall make all reasonable efforts to promptly correct the Errors
         in any Deliverable set forth in the Statement of Errors, and redeliver
         the Deliverable to PHILIPS within the specified time, which will be
         mutually agreed to by the parties, provided that the dates specified
         for items 1 and 6 in the chart under Section 5.2.1 are not exceeded.


                                       3




3.3      PHILIPS will within [***] after such redelivery provide PCOM with a
         written acceptance or another Statement of Errors. This procedure
         set forth in Sections 3.1 through 3.3 will be repeated until PHILIPS
         accepts the deliverables or terminates pursuant to Section 3.4
         herein.

3.4      Should PHILIPS determine, prior to acceptance, that any Deliverable
         fails to meet the Specification, either (i) after the second redelivery
         of that Deliverable pursuant to 3.1.2, or (ii) after any delivery or
         redelivery which is late, PCOM will be deemed to be in material breach
         and PHILIPS may reject that Deliverable and any subsequent Deliverables
         and/or the Agreement.

3.5      If PHILIPS fails to provide PCOM with a written statement of Errors
         within the applicable [***], PHILIPS shall be deemed to have
         accepted the subject Deliverable.

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

4.0   LICENSES

4.1      LICENSE FOR DOCSIS 1.0 MAC.

4.1.1    GRANT OF LICENSE. Subject to the terms and conditions of this
         Agreement, PCOM grants to PHILIPS and its Affiliates a
         non-exclusive, [***], worldwide, perpetual, non-transferable (except
         to PHILIPS' Affiliates) right and license, under the License Rights,
         to use, make, have made, reproduce, have reproduced, perform,
         modify, and prepare Derivative Works of, the PCOM DOCSIS 1.0 MAC,
         and the Derivative Works thereof, to design, develop, make, have
         made Products incorporating or using the PCOM DOSIS 1.0 MAC and/or
         Derivative Works thereof by or for PHILIPS and/or its Affiliates,
         and to use, distribute, import, offer to sell, and sell such
         Products, worldwide.

4.1.2    MODIFICATIONS. PHILIPS' right to modify pursuant to this Section 4.1.l
         above, gives PHILIPS the unlimited right to modify or create Derivative
         Works of the PCOM DOCSIS 1.0 MAC, including but not limited to
         developing a DOCSIS 1.1 and/or DOCSIS 1.2 versions of DOCSIS MAC, for
         incorporation or use in Products made by or for PHILIPS and/or its
         Affiliates, as granted therein.

4.2      LICENSE FOR DOCSIS 1.1 MAC.

4.2.1    GRANT OF LICENSE. Subject to the terms and conditions of this
         Agreement, PCOM grants to PHILIPS and its Affiliates a
         non-exclusive, [***] (subject to Sections 5.3 and 5.5), worldwide,
         perpetual, non-transferable (except to PHILIPS' Affiliates) right
         and license under the License Rights to use, make, have made,
         reproduce, have reproduced, perform, modify, and prepare Derivative
         Works of, the PCOM DOCSIS 1.1 MAC, and the Derivative Works thereof,
         to design, develop, make, have made Products incorporating or using
         the PCOM DOSIS 1.1 MAC and/or Derivative Works thereof by


                                       4




         or for PHILIPS and/or its Affiliates, and to use, distribute, import,
         offer to sell, and sell such Products, worldwide.

4.2.2    MODIFICATIONS. PHILIPS' right to modify pursuant to this Section 4.2.l
         above, gives PHILIPS the unlimited right to modify or create Derivative
         Works of the PCOM DOCSIS 1.1 MAC, including but not limited to
         developing a DOCSIS 1.2 versions of DOCSIS MAC, for incorporation or
         use in Products made by or for PHILIPS and/or its Affiliates, as
         granted therein.

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

5.0   LICENSE FEES

5.1.1    License Fee for the PCOM DOCSIS 1.0 MAC

5.1.2    PHILIPS shall pay PCOM a [***]for the licensing of the PCOM DOCSIS
         1.0 MAC.

5.2      License Fee for the PCOM DOCSIS 1.1 MAC.

5.2.1    PHILIPS will pay PCOM [***] for the licensing of the PCOM DOCSIS 1.1
         MAC (subject to Section 5.2.2), payable in accordance with the
         milestones in the following chart. The Deliverables are described
         below for each milestone. The percentage figures listed in the chart
         represents the percentage of the total fee of [***] that is to be
         paid upon PHILIPS' acceptance of the respective Deliverable for the
         milestone.




- ----------------------------------------------------------------------------------------------------------------
Item                Date           Deliverables and Milestones for delivery and acceptance
- ----------------------------------------------------------------------------------------------------------------
                          
- ----------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------
1           [***]   [***]         PS 1.1 MAC/Ethernet VHDL &Simulation Database
- ----------------------------------------------------------------------------------------------------------------
2                   [***]         PS 1.1 MAC/Ethernet Synthesis for P&R and QT
- ----------------------------------------------------------------------------------------------------------------
3                   [***]         FPGA Verified MAC/Ethernet w/3930
- ----------------------------------------------------------------------------------------------------------------
4           [***]   [***]         QT Verification
- ----------------------------------------------------------------------------------------------------------------
5                   [***]         Post P&R Timing Verification
- ----------------------------------------------------------------------------------------------------------------
6           [***]   [***]         Full SW
- ----------------------------------------------------------------------------------------------------------------
7                   [***]         Si Validation
- ----------------------------------------------------------------------------------------------------------------
8           [***]   [***]         Cable Labs Certification (1.0 or 1.1)
- ----------------------------------------------------------------------------------------------------------------


[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

5.2.2     With respect to each Deliverable set forth in Section 5.2.1, the
          license granted for the PCOM DOCSIS 1.1 MAC under Section 4.2 shall
          apply upon payment for that Deliverable. In the event PCOM fails to
          deliver the PCOM DOCSIS 1.1 MAC deliverable for any milestone as set
          forth in Section 5.2.1 and 5.6, PHILIPS shall not be required to pay
          for any of the following deliverables and shall have full license
          rights with respect to all PCOM DOCSIS 1.1 MAC Deliverables delivered
          to PHILIPS,


                                       5



          provided that PHILIPS has paid the respective milestone fees for such
          Deliverables as set forth in Section 5.2.1, items 1-9..

5.2.3     The total fee associated with this Article 5 shall be [***], to be
          paid out in accordance with Section 5.1 for the PCOM DOCSIS 1.0 MAC
          (for the amount of [***], and Section 5.2 for the PCOM DOCSIS 1.1
          MAC, in accordance with items 1 through 9 of the milestones for
          delivery and acceptance matrix (for the amount of [***], referenced
          therein.

5.3       Upon full production of a Product that incorporates the DOCSIS MAC
          provided by PCOM herein, PHILIPS Semiconductors shall pay to PCOM a
          royalty fee of [***] device for each unit sold (excluding any units
          sold to PCOM), up to a limitation cap of [***], subject to Section
          5.6 (the "Maximum Royalty Amount"). Philips shall not pay any
          royalties on any Products sold to PCOM. The Maximum Royalty Amount
          is the maximum amount of royalties to be paid under this Agreement,
          which shall be [***], unless Section 5.6 applies, in which case the
          Maximum Royalty Amount shall be [***]. At the time that the total,
          combined royalties paid under this Agreement reaches the Maximum
          Royalty Amount, PHILIPS shall have no further obligation or
          liability to pay any further royalties on any Products that
          incorporate the DOCSIS MAC, and all liability for such royalties
          shall cease and the licenses granted under this Agreement shall
          remain and continue in effect as royalty-free, fully paid-up
          licenses. Should the Maximum Royalty Amount not be reached by
          December 31, 2001, PHILIPS Semiconductors shall then pay PCOM the
          difference between the sum of all royalties then paid to date and
          the applicable Maximum Royalty Amount ([***], or [***] if Section
          5.6 applies), and the Maximum Royalty Amount shall be deemed to
          have been reached and paid in full. This final payment shall be
          made to PCOM in one lump sum payment, due and payable by PHILIPS
          net 30 days thereafter.

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

5.4       The royalties due under Section 5.3 shall be paid on a [***].
          Within [***] after the end of each calendar quarter, PHILIPS shall
          deliver to PCOM a royalty statement showing (i) the net number of
          units sold during that calendar quarter that are subject to royalty
          payment and (ii) the total amount of royalty payments due for that
          quarter, along with the payment for the total amount of royalties
          due for that calendar quarter. The net number of units sold means
          the total number of units sold less any returns.

5.5       For [***] after the end of the relevant reporting period, PHILIPS
          shall keep accurate records containing all the data reasonably
          required for the computation and verification of the amounts to be
          paid for such period and information to be given in the quarterly
          statements under Section 5.4. PHILIPS shall, during usual business
          hours, permit a national independent certified public accounting
          firm selected by PCOM, not more frequently than once per year, at
          PCOM's expense and prior arrangement, to inspect the same for the
          sole purpose of determining the royalty amounts payable pursuant to
          Section 5.3. All such audits shall be conducted following
          reasonable prior


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          written notice and the auditors shall comply with PHILIPS' normal
          safety and security procedures, and shall agree in writing to treat
          all information furnished by PHILIPS in the course of such audit as
          PHILIPS' Confidential Information. Such auditors shall disclose to
          PCOM only the amount of any discrepancy and the basis thereof. In
          the event of any underpayment, PHILIPS shall promptly remit to PCOM
          all amounts due. In the event that the underpayment is more than
          [***] for the period audited, PHILIPS shall remit to PCOM the
          reasonable costs of the accounting firm's fee for such audit.

5.6       PCOM acknowledges that the delivery dates specified in the chart
          under Section 5.2.1 are critical to the success of the PHILIPS
          Products. Accordingly, if the Deliverable for Item 5 is not
          delivered on or before [***], PHILIPS shall have the option, at its
          sole discretion, to cancel the Agreement, including any further
          payments and royalties. In the event Item 7 is not delivered on or
          before [***], PHILIPS' sole financial obligation shall be reduced
          to [***].

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

6.0  OWNERSHIP

6.1      OWNERSHIP BY PCOM. PCOM shall retain ownership of all proprietary
         rights, including patent, copyright, trade secret, trademark and other
         proprietary rights, in and to the DOCSIS MAC provided by PCOM to
         PHILIPS under this Agreement. This Agreement shall not be construed to
         grant any ownership interest to any PCOM patent, copyright, trade
         secret, trademark or other proprietary right to PHILIPS.

6.2      TRANSFERS BY PCOM. In the event PCOM and/or PHASECOM INC. ever assigns
         or otherwise transfers ownership of any of its proprietary rights in
         the DOCSIS MAC, PCOM and PHASECOM INC. shall insure that such third
         party assumes the rights and obligations of PCOM and PHASECOM INC. as
         set forth in this Agreement. Notwithstanding any transfer or assignment
         of this Agreement, the grants of licenses set forth in Section 4 shall
         remain in full force and effect.

6.3      OWNERSHIP BY PHILIPS. Subject to PCOM.'s ownership rights under Section
         6.1 in the DOCSIS MAC provided by PCOM to PHILIPS, PHILIPS and its
         Affiliates shall own all modifications and Derivative Works made to the
         DOCSIS MAC by PHILIPS and its Affiliates.

7.0   CONFIDENTIAL INFORMATION

7.1      CONFIDENTIAL INFORMATION. As used herein, "Confidential Information"
         means the proprietary or confidential information of either Party which
         is disclosed by such Party ("Discloser") to the other Party
         ("Recipient") pursuant to this Agreement, including semiconductor
         technology, computer or data processing programs, electronic and data


                                       7



         processing applications, routines, subroutines, techniques or systems,
         or information concerning the business or financial affairs and methods
         of operation or proposed methods of operation, accounts, transaction,
         proposed transactions or security procedures of either a Party or its
         Affiliates, vendors, or customers. The DOCSIS MAC information shall be
         considered PCOM Confidential Information. The PHILIPS Product
         information shall be considered PHILIPS Confidential Information. All
         Confidential Information that is disclosed in tangible form shall be
         marked by the Discloser as confidential or proprietary prior to
         disclosure. Confidential Information that is disclosed in non-tangible
         form shall be identified by the Discloser at the time of disclosure as
         being confidential or proprietary and shall be confirmed in writing
         within ten (10) days from its disclosure.

7.2      Confidential Information shall not include information that:
         (i) was rightfully in the Recipient's possession prior to receipt from
         the Discloser.
         (ii) is or becomes a matter of public knowledge through no fault or
         breach of the Recipient;
         (iii) the Recipient rightfully receives from a third party, who has the
         right to so transfer or disclose it, without a duty of confidentiality
         on the third party or breach of this Agreement; or
         (iv) is independently developed by Recipient without use of the
         Discloser's Confidential Information.

7.3      OBLIGATIONS OF CONFIDENTIALITY. Each Party agrees to maintain
         Confidential Information received from the Discloser in confidence
         and neither use for any purpose apart from this Agreement, nor
         disclose Confidential Information to any third party, except
         Affiliates, without the prior written approval of the Discloser, or
         as is required to comply with any order of a court, or any
         applicable rule, regulation or law of any jurisdiction. In the event
         that Recipient is required by judicial or administrative process to
         disclose Confidential Information of the Discloser, it shall
         promptly notify the Discloser and allow the Disclosure a reasonable
         time to oppose such process or seek a protective order. Within
         PHILIPS and PCOM and their respective Affiliates, Confidential
         Information shall be disclosed only on a needs to know basis. The
         foregoing obligations for Confidential Information shall remain in
         force during the term of the Agreement and [***] following the
         expiration or termination of this Agreement.

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

7.4      DEGREE OF CARE. Each Party shall protect Confidential Information by
         using the same degree of care, but not less than a reasonable degree of
         care, to prevent the unauthorized disclosure or use of Confidential
         Information, as that Party uses to protect its own confidential and
         proprietary information of like nature and similar importance.

7.5      CONSULTANTS AND CONTRACTORS. Confidential Information may be disclosed
         by PHILIPS to its consultants and contractors performing work or
         services for PHILIPS in accordance with the scope of this Agreement,
         provided that such consultants and contractors are subject to a valid,
         binding and enforceable agreement to maintain the obligations of
         confidentiality no less restrictive than those set forth in this
         Section 7.


                                       8



7.6      PHILIPS' CUSTOMERS. Confidential Information may be disclosed by
         PHILIPS to its customers as reasonably necessary for the purposes of
         designing or developing Products for the customers, provided that such
         customers enter into PHILIPS' standard non-disclosure agreement for the
         protection of the Confidential Information.

8.0   INDEMNITY

8.1      INDEMNIFICATION BY PCOM. PCOM shall indemnify, hold harmless and defend
         PHILIPS from and against any and all liabilities, suits, claims,
         losses, damages, judgments, and costs (including reasonable attorneys'
         fees) (collectively "Claims") brought by a third party against PHILIPS
         for infringement of any patent, copyright. trade secret, trademark or
         other legally enforceable proprietary right of any third party to the
         extent directly arising out of (i) the DOCSIS MAC, as delivered to
         PHILIPS, or the use of the DOCSIS MAC in accordance with the license
         rights granted herein; (ii) any services performed by PCOM pursuant to
         this Agreement, or (iii) any materials furnished by PCOM hereunder.

8.2      The foregoing obligation is subject to the following conditions:

         (i) PCOM shall have the sole right to defend and/or settle any such
         Claim;

         (ii) PHILIPS shall give PCOM immediate notice of any such asserted
         Claim and reasonable assistance required by PCOM in defending or
         settling such Claim; and

         (iii) PCOM shall have no liability associated with any infringement or
         alleged infringement arising out of the combination of the DOCSIS MAC
         with other components if such infringement would have been avoided in
         the absence of such combination, unless such combination was specified
         by PCOM. The foregoing states PCOM's sole and exclusive liability for
         intellectual property infringement.

8.3      INDEMNIFICATION BY PHILIPS. PHILIPS shall indemnify, hold harmless and
         defend PCOM from and against any and all liabilities, suits, claims,
         losses, damages, judgments, and costs (including reasonable attorneys'
         fees) (collectively "Claims") brought by a third party against PCOM for
         infringement of any patent, copyright. trade secret, trademark or other
         legally enforceable proprietary right of any third party to the extent
         directly arising out of (i) solely the Product(s) in which a DOCSIS MAC
         is incorporated, exclusive of the incorporated DOCSIS MAC; and (ii) any
         modifications made to the DOCSIS MAC by Philips and/or its Affiliates
         if such infringement would not have occurred in the DOCSIS MAC without
         such modification.


                                       9



8.4      The obligation set forth in 8.3 is subject to the following conditions:

         (i) PHILIPS shall have the sole right to defend and/or settle any such
         Claim;

         (ii) PCOM shall give PHILIPS immediate notice of any such asserted
         Claim and reasonable assistance required by PHILIPS in defending or
         settling such Claim; and

         (iii) PHILIPS shall have no liability associated with any infringement
         or alleged infringement arising out of the DOCSIS MAC as provided by
         PCOM to PHILIPS, or out of the combination of the DOCSIS MAC with other
         components, except for the Product itself, if such infringement would
         have been avoided in absence of such combination.

The foregoing states PHILIP's sole and exclusive liability for intellectual
property infringement.

9.0   WARRANTIES

9.1      OWNERSHIP. PCOM warrants that it is the owner of the DOCSIS MAC as
         delivered to PHILIPS and the owner of all intellectual property rights
         associated with and/or subsisting in the DOCSIS MAC as delivered to
         PHILIPS.

9.2      OPERATION. PCOM warrants that the DOCSIS MAC delivered to PHILIPS shall
         operate according to the specifications provided, and that there are no
         known defects of which PCOM has not made PHILIPS aware. Notwithstanding
         the foregoing, PCOM shall not be liable on account of any breach of
         warranty claims asserted by customers or purchasers of PHILIPS. Except
         for PCOM's indemnification obligations under Section 8, PHILIPS shall
         be responsible for any commercial liabilities arising out of its sale
         of its products to PHILIPS' customers.

10.0   LIMITATION OF LIABILITIES

10.1     Neither party shall be liable for any incidental, consequential.
         special, or punitive damages arising out of this Agreement or the
         breach thereof (including, but not limited to, lost profits), and any
         such liabilities are expressly disclaimed.

11.0   SUPPORT SERVICES

11.1     At PHILIPS' request, PCOM shall provide reasonable assistance to
         PHILIPS in implementing the DOCSIS MAC into PHILIPS Products. At
         PHILIPS' request, PCOM shall use reasonable commercial efforts to
         provide PHILIPS with the necessary knowledge and information for,
         and otherwise assist PHILIPS in, manufacturing or having made a
         PHILIPS Product incorporating the DOCSIS MAC. If PCOM's assistance
         in providing engineering support for designs not agreed to in this
         Agreement or cable modem reference design, PHILIPS agrees to
         compensate PCOM at a rate of [***]. If PCOM's on-site presence is
         requested which has not been agreed to in

[***] Denotes language for which Vyyo has requested confidential treatment
      pursuant to the rules and regulations of the Securities Act of 1933, as
      amended.

                                       10


         this Agreement, PHILIPS agrees to compensate PCOM for all reasonable
         travel and lodging expenses, subject to PHILIPS' prior approval.

12.0   TERM AND TERMINATION

12.1     TERM. This Agreement shall continue in effect unless terminated as set
         forth herein.

12.2     TERMINATION FOR BREACH. Either party may terminate this Agreement if
         the other party materially breaches the Agreement and breaching party
         fails to cure such breach within thirty days from receipt of written
         notice from the non-breaching party describing the breach.

12.3     TERMINATION FOR NON-PERFORMANCE. PHILIPS may terminate as provided
         under Section 5.5, upon thirty (30) days prior written notice.

12.4     TERMINATION UPON BANKRUPTCY. A party may terminate this Agreement if
         the other party (i) commences a voluntary case or other proceeding
         seeking liquidation, reorganization or other relief with respect to
         itself or its debts under any bankruptcy, insolvency or other similar
         law now or hereafter in effect, or (ii) an involuntary bankruptcy
         action or other such proceeding is commenced against it, and it is not
         dismissed from such involuntary action or proceeding within ninety (90)
         days from the commencement of such action or proceeding.

12.5     SURVIVAL AFTER TERMINATION. Except for termination of this Agreement
         under Section 12.2 based on PHILIPS' material breach of the Agreement
         and failure to cure as set forth in Section 12.2, the all licenses
         granted under this Agreement shall survive the termination of this
         Agreement.

12.6     MOST FAVORED PRICING. PHILIPS agrees to offer to PCOM the PHILIPS'
         Product(s) that incorporate the DOCSIS MAC at PHILIPS' most favored
         customer prices for such Product for the same or greater quantities
         under similar terms and conditions, provided that PCOM does not offer
         such products for resale as a standalone product.

12.7     RIGHT OF FIRST REFUSAL For a period of one year beginning on the
         Effective Date of this Agreement, in the event that PHILIPS decides to
         purchase from a third party (excluding PHILIPS' Affiliates) a DOCSIS
         1.2 MAC for use in cable modem applications, PHILIPS shall provide
         written notice to PCOM, and PCOM shall have a first right of refusal to
         offer PHILIPS a PCOM DOCSIS 1.2 MAC on identical terms and conditions
         offered by such third party. This provision shall not apply and
         specifically excludes (i) any DOCSIS 1.2 MAC provided by a customer for
         integration into a customer specific integrated circuit; (ii) any case
         whereby a customer wishes to incorporate its own DOCSIS 1.2 MAC with
         other PHILIPS intellectual property into an applications specific
         standard product; and (iii) all other PHILIPS entities and Affiliates
         who may wish to purchase a DOCSIS 1.2 MAC for a wireless application.


                                       11



13   GENERAL

13.1     ASSIGNMENT. Subject to Section 6.2 and the last sentence of this
         Section 15.1, neither party may assign this Agreement nor any right or
         obligation hereunder without the prior written consent of the other
         party which consent will not be unreasonably withheld. PHILIPS may
         assign this Agreement to any Affiliate or wholly-owned subsidiary of
         PHILIPS, without the prior written consent of PCOM.

13.2     WAIVER. No delay in exercising, no course of dealing with respect to,
         or no partial exercise of any right or remedy hereunder shall
         constitute a waiver of any other right or remedy, or future exercise
         thereof.

13.3     SEVERABILITY. If any term or provision of this Agreement should be
         declared invalid by a court of competent jurisdiction, (i) the
         remaining terms and provisions of this Agreement shall be unimpaired,
         and (ii) the invalid term or provision shall be replaced by such valid
         term or provision as comes closest to the intention underlying the
         invalid term or provision. Where the invalid term or provision cannot
         be replaced by a valid term or provision which comes closest to the
         intention underlying the invalid term or provision, the invalid term or
         provision shall be severed from the remaining terms, conditions and
         provisions which shall continue to be valid to the fullest extent
         permitted by law.

13.4     NOTICE. Written notice by either party to the other shall be deemed to
         have been given when received via certified mail by the intended
         recipient thereof at its address shown on the first page hereof, or to
         such other address as such intended recipient may specify in a written
         notice pursuant hereto.

13.5     GOVERNING LAW. This Agreement shall be governed in all respects by the
         laws of the United States of America and the State of California,
         excluding the application of its conflict of laws rules. This Agreement
         shall be considered made and entered into in the State of California.
         The parties agree that the United Nations Convention on Contracts for
         the International Sale of Goods is specifically excluded from
         application to this Agreement. Any lawsuits or other legal actions
         brought to enforce this Agreement, or otherwise related to this
         Agreement shall be brought exclusively in the federal and state courts
         within the State of California.

13.6     ARBITRATION. Any unresolved disputes concerning this Agreement shall be
         submitted to arbitration in accordance with the then prevailing rules
         of the American Arbitration Association (i) before an arbitrator agreed
         upon by the parties or (ii) if the parties cannot agree upon an
         arbitrator within thirty (30) days, before three arbitrators selected
         pursuant to the rules of the American Arbitration Association. The site
         of the arbitration shall be San Francisco, CA. The arbitrator(s) may
         award attorneys' fees and cost as part of the award. The award of the
         arbitrator shall be binding and may be entered as a judgment in
13.7     any court of competent jurisdiction. Either Party may seek injunctive
         relief from a court of competent jurisdiction if to protect the
         legitimate interest of the Party seeking such relief.


                                       12



13.7     FORCE MAJEURE. Each party shall be excused for failures and delays in
         performance caused by war, any laws, proclamations, ordinances, or
         regulations, or strikes, lockouts, floods, fires, explosions, acts of
         God, or other catastrophes beyond its reasonable control and without
         the fault of such party. This prevision shall not, however, release
         such party from using its reasonable best efforts to avoid or remove
         all such causes, and such party shall continue performance hereunder
         with the utmost dispatch whenever such causes are removed. Any party
         claiming any such excuse for failure or delay in performance shall give
         prompt written notice thereof to the other party, and neither party
         shall be required to perform hereunder during the period of such
         excused failure or delay in performance except as otherwise provided
         herein.


13.8     SURVIVAL. Sections 1, 4, 5, 6, 7, 8, 9, 10, and 13 shall survive the
         expiration or termination of the Agreement.

This Agreement together with the Exhibits hereto, constitutes the entire
Agreement between the parties with respect to the subject matter hereof and
supersedes in all respects all prior proposals, negotiations, conversations,
discussions and agreements between the parties. This Agreement may not be
modified or amended except by express written amendment signed by authorized
representatives of both parties

IN WITNESS WHEREOF, the parties hereto, through their duly authorized officers,
have executed this Agreement.


                                       13



ACCEPTED AND AGREED TO:

PHASECOM LTD.                                   PHILIPS SEMICONDUCTORS INC,

/s/ Menashe Shahar                                  /s/
- -----------------------------------------       --------------------------------
Signature                                       Signature

Menashe Shahar
- -----------------------------------------       --------------------------------
Name                                            Name


Vice President, Research & Development          --------------------------------
Chief Technology Officer                        Title
- -----------------------------------------
Title
                                                --------------------------------
November 14, 1993                               Date
- -----------------------------------------
Date

PHASECOM INC.

/s/ Ilan Judkiewicz
- -----------------------------------------
Signature

Ilan Judkiewicz
- -----------------------------------------
Name

Chief Financial Officer
- -----------------------------------------
Title

December 14, 1999
- -----------------------------------------
Date


                                       14



                                    EXHIBIT A

                             DOCSIS 1.0 MAC SOFTWARE

Upon the signing of the licensing agreement and delivery of DOCSIS MAC 1.0,
including:

     a)   1.0 MAC specification excluding BPI with detailed design documentation
          on each hardware block
     b)   VHDL source code
     c)   The test benches
     d)   All applications source code for 1.0 cable modem running under Windows
          95
     e)   1.0 MAC FPGA
     f)   PCOM cable modem 1.0 prototype
     g)   1.0 software sources and 1.0 software documentation as described in
          Appendix A.
     h)   Unit test software for 1.0 software.
     i)   Engineer visit (1 hardware engineer, 1 software engineers, for 2 weeks
          in Sunnyvale)
     j)   Sign-off of MAC 1.1 feature list
     k)   Full Architecture Specifications for 1.1 MAC
     l)   Full software Architecture Specifications and requirements
          specification for 1.1 MAC


                                       15



                                    EXHIBIT B

                                  SCOPE OF WORK

                                       FOR

                             DOCSIS 1.1 MAC SOFTWARE

Delivery of PHILIPS DOCSIS MAC 1.1 firmware and VHDL sources, including:

     a)   Simulation test bench
     b)   Test vectors (Stimulus and simulation output files)

Delivery of PHILIPS DOCSIS MAC 1.1 Synthesis for P&R and QT

     a)   Synthesis scripts
     b)   Scripts for timing driven place and route
     c)   Gate-level simulated with timing Netlist for P&R
     d)   List of all critical paths
     e)   Test vectors for simulation of critical path

The foregoing activity will be performed by PHILIPS and the output files will be
checked by PCOM using PCOM's tools. PHILIPS is required to provide the output
VHDL model of the PHILIPS DOCSIS MAC1.1 (VITAL libraries with SDF).

QT Verification

     a)   Send an engineer to Sunnyvale for 4 weeks for QT simulation (10/18 to
          11/15)

Post P&R and timing verification

     a)   PCOM will provide telephone support for this activity and will be
          ready to send an engineer to Sunnyvale for two (2) weeks (11/15 to
          12/1) if reasonably deemed necessary.

Full PHILIPS 1.1 MAC software

     a)   Test software
     b)   Full 1.1 MAC and applications source code
     c)   1.1 MAC specification with detailed design documentation on each
          hardware block
     d)   1.1 Software: requirements spec, design spec, test spec, test results,
          bug list,
     e)   Fully tested on PCOM evaluation board all PCOM cable modem application
          software.


                                       16



Silicon validation

     a)   6 weeks on call, at site if needed starting 2/15/00

Cable Labs certification

     a)   4 weeks on call targeted for wave 2 (May 2000)

PCOM shall provide to PHILIPS technical support for bug fixes and maintenance
for a one year period after silicon validation

- -    on-call support with 24-hour response time and guaranteed engineering
     resource allocation , excluding weekends and holidays.