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                                                                    Exhibit 10.1

[CABLETRON LOGO]

                      CABLETRON PRODUCT RESELLER AGREEMENT

The terms contained herein, along with the attachments and exhibits constitute
an "Agreement" made this 1st day of February, 2000. (the "Effective Date")
between Cabletron Systems, Inc., a Delaware corporation with its principal place
of business at 35 Industrial Way, Rochester, New Hampshire, U.S.A., and its
subsidiaries (collectively "Cabletron") and Interspeed, Inc., a Delaware
corporation, with its principle place of business at 39 High Street, North
Andover, Massachusetts 01845, ("Supplier").

1.  DEFINITIONS:

1.1.  Business Days shall mean week days excluding the United States holidays of
      Martin Luther King Day, Presidents' Day, Memorial Day, Labor Day, Columbus
      Day and Thanksgiving Day and the days of January 1st, July 4th and
      December 25th when those days are on or are celebrated on weekdays.

1.2.  End User shall mean the ultimate customer that purchases Products for its
      internal use from Cabletron or a Reseller.

1.3.  Exhibits - The Exhibits to this Agreement are:

      Exhibit A Products & Prices
      Exhibit B Product Quality and Test Specifications
      Exhibit C Technical Support Guidelines
      Exhibit D Service Support Plan

1.4.  Hardware Products shall mean Supplier's hardware offered to Cabletron for
      resale to End-Users. Hardware Products consisting of so-called "firmware"
      shall not be deemed sold by Cabletron or Resellers, but shall be subject
      to a license to use the same.

1.5.  Intellectual Property Rights shall mean all patents, copyrights,
      trademarks, mask works and other intellectual property rights relating to
      a Product.

1.6.  Leap Year shall mean a calendar year that is evenly divisible by 4. If the
      year is evenly divisible by 100 (known as a century year), it is not a
      leap year. However, if the century year is evenly divisible by 400, then
      it is a leap year.

1.7.  Licensed Software shall mean Supplier software, together with related
      documentation and media that is supplied separately from a Hardware
      Product.

1.8.  Orders shall mean purchase orders for Products submitted to Supplier by
      Cabletron under the terms of this Agreement.

1.9.  Parties shall mean Supplier and Cabletron.

1.10. Products shall mean the Supplier Hardware Products and Licensed Software
      that are eligible for purchase and resale by Cabletron and listed on
      Exhibit A to this Agreement.

1.11. Product Specifications shall mean Supplier's published specifications for
      the Supplier product current on date Supplier accepts Cabletron's Order
      and any additional specifications agreed to by the Parties in writing.

1.12. Resellers shall mean entities authorized by Cabletron to resell Products.

1.13. Return Material Authorization or "RMA" shall have the meaning set forth in
      Section 8.3.

1.14. Software shall mean Licensed Software and software (firmware) incorporated
      in Hardware Products.

1.15. Software Updates shall mean corrective patches, fixes, error and other
      corrections not constituting new versions of Software.

1.16. Software Upgrades shall mean new versions of Software with enhanced
      features or performance characteristics.

1.17. Territory - Unless otherwise specified or agreed by the Parties, the
      Territory is worldwide.

1.18. Warranty Period -- Unless otherwise specified by agreed by the Parties,
      the Warranty Period shall be the shorter of twelve (12) months from the
      date the Product is delivered to the End User or thirteen (13) months from
      the date the Product is shipped to Cabletron. [PLEASE PROVIDE PRODUCT
      WARRANTY STATEMENT.]


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1.19. Year 2000 Compliant shall mean, with respect to information technology,
      that the information technology, where applicable, accurately processes
      date/time data (including, but not limited to, calculating, comparing, and
      sequencing), from, into, and between the twentieth and twenty-first
      centuries, and the years 1999 and 2000 and Leap Year calculations, to the
      extent that other information technology, used in combination with the
      information technology being acquired, properly exchanges date/time data
      with it. This Year 2000 Compliant definition is based on the definition
      set forth in the U.S. Government's Federal Acquisition Regulation (FAR),
      Subpart 39.002.

2.  RELATIONSHIP:

2.1.  Appointment - Supplier appoints Cabletron as a non-exclusive reseller of
      the Supplier products sold to End Users under the terms of this Agreement.
      The Products eligible for purchase and resale or license by Cabletron
      under this Agreement are listed on Exhibit A.

2.2   Relationship Reviews -- Supplier and Cabletron will conduct reviews of
      their relationship and performance under this Agreement at least quarterly
      each year following the Effective Date.

2.3   Channel Conflict Mitigation -- In order to ensure that Supplier's and
      Cabletron's sales forces do not work at cross-purposes, and to reward
      cooperative pursuit of sales opportunities between Supplier and Cabletron,
      Supplier agrees that for any Product sold by Cabletron pursuant to this
      Agreement, Supplier's sales force in the territory in which the Product is
      sold shall be compensated fully through ordinary commission and revenue
      retirement for such Product sale, as though it had been made by Supplier's
      sales force.

3.  SUPPLIER'S INVENTORY COMMITMENT:

3.1.  Inventory -- Supplier shall at all times hold in inventory an amount of
      each Product sufficient to satisfy an order by Cabletron equal to the
      then-current next month's forecast of expected Product demand. Supplier
      shall in particular keep on hand a sufficient supply of Products or parts
      thereof identified by Cabletron as "long lead-time" materials to meet
      Cabletron's orders for such Products or parts, and upon request shall at
      all times hold in inventory an amount of such Products or parts equal to
      twice the then-current next month's forecast of expected demand.

3.2.  Cabletron Forecasts -- Cabletron shall provide to Supplier during the
      first week of each calendar month a forecast of its expected demand for
      Products for the six-month period beginning thirty days following the
      forecast. Such forecast shall create no obligation on Cabletron's part to
      submit a firm order for Products.

4.  PRODUCTS AND PRICING:

4.1.  Products -- Products shall include any product introduced by Supplier
      during any term of this Agreement that enhances or is the functional
      replacement for any Product. All Products shall be manufactured by
      Supplier using new components and other materials.

4.2.  New Products - New products may be added or deleted to Exhibit A and
      become Products by written agreement of the Parties

4.3.  Withdrawal of Products - Supplier may cease production and withdraw any
      Product from Exhibit A, provided Supplier gives Cabletron a written
      "Product Withdrawal Notice" at least one hundred eighty (180) days prior
      to the effective date of the withdrawal. Cabletron may, within one hundred
      eighty (180) days after receipt of a Product Withdrawal Notice, submit a
      single, non-cancelable "Last Buy" Order for an unlimited quantity of the
      affected Product for delivery within the subsequent six (6) months.

4.4.  Right to Manufacture -- In the event of any such Product Withdrawal or
      termination of this Agreement, Cabletron may require Supplier, without
      obligation or charge to Cabletron, to provide Cabletron the technical
      information, assistance, and support, as well as license to Cabletron all
      patent and other rights necessary to enable Cabletron to manufacture or
      have manufactured such Products or parts. Supplier shall continue to
      provide support for all such withdrawn Products for five (5) years
      following their withdrawal, pursuant to the terms of this Agreement. In
      addition, Seller agrees to sell or lease to Cabletron, if Cabletron
      desires, and based on its then fair market value, all tooling owned or
      controlled by Seller and necessary for such manufacture of the Products
      and parts. Technical information includes, by example and not by way of
      limitation: (i) manufacturing drawings and specifications of raw materials
      and components comprising such parts; (ii) manufacturing drawings and
      specifications covering special tooling and the


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      operation thereof; (iii) a detailed list of all commercially available
      parts and components purchased by Seller on the open market disclosing the
      part number, name and location of the supplier, and price lists for the
      purchase thereof; and (iv) one (1) complete copy of the then current
      source code used in the preparation of any Software licensed or otherwise
      acquired by Cabletron from Seller hereunder.

4.5.  Software and Firmware -- All Software shall be provided to Cabletron and
      its customers subject to a use license. Supplier shall provide Software
      Upgrades, Software Updates and all other necessary technical support at no
      additional Charge.

4.6.  Product Specifications: - Supplier shall provide to Cabletron the Product
      Specifications for all Products listed in Exhibit A, and for Products
      which may be added to this Agreement.

4.7.  Product Modifications - All Product modifications shall be subject to the
      provisions of Exhibit B. In the event Supplier intends to modify a Product
      Specification affecting its form, fit, interoperability or function,
      Supplier shall notify Cabletron of the modification in writing no later
      than one hundred and eighty (180) days prior to the effective date of the
      modification. Based upon information from Cabletron, Supplier will use its
      best efforts to mitigate the impact of any modification on Cabletron,
      including consideration of changes to the modification and allowing
      Cabletron to make a final purchase of the unmodified Products, provided
      that the final Order for unmodified Products shall be placed at least
      thirty (30) days prior to the effective date of the modification for
      delivery within ninety (90) days.

4.8.  Documentation and Materials -- Supplier agrees to provide hard and
      electronic copies of all specifications, user instructions, manuals and
      other documentation for Products ("User Documentation") and all
      instructions, manuals and other documentation relating to the
      installation, operation and maintenance of Products ("Maintenance
      Documentation") to Cabletron without charge. Cabletron shall have the
      right to use, modify, translate, reproduce and distribute User
      Documentation and Maintenance Documentation in connection with Cabletron's
      use, marketing, resale, distribution and support of Products.

4.9.  Marketing Materials -- Supplier shall provide Cabletron, upon request,
      sales material to be used in the promotion and sale of the Products at no
      charge.

4.10. Export Licensing -- Supplier will provide all necessary assistance in
      order that Cabletron may obtain export license approval for the Products
      from any and all relevant governmental entities, upon Cabletron's request
      and at no additional charge.

4.11. Prices -- During the first year after the Effective Date, Cabletron may
      purchase Products at prices no greater than those described in Exhibit A
      to this Agreement. All dollar amounts referred to in this Agreement are
      United States dollars.

4.12. Most Favored Customer Pricing - Supplier agrees that should it agree to
      supply any Product or product substantially equivalent to any Product to
      any competitor of Cabletron at a prices less than the relevant prices
      established by this Agreement, Supplier shall reduce the price under this
      Agreement to the lower level as of the date that Supplier agreed to offer
      the lower price to the third party. The lower price shall apply to all
      Orders not delivered as of that date and all subsequent Orders for the
      affected Product.

4.13. Price Changes -- Upon the written request of Cabletron, Parties shall meet
      within ten (10 ) Business Days of the request, to consider and negotiate
      in good faith requested changes in Product prices. Additionally, the
      Parties shall review Product pricing no less frequently than every six (6)
      months in order to assure compliance with the terms of this Agreement,
      including specifically this Article 4.

4.14. Price Decreases -- In the event Supplier determines to lower the price of
      a Product, the price decrease shall apply to Orders for the Products not
      delivered as of the effective date of the decrease and all subsequent
      Orders for the affected Product.

4.15. Price Terms - Prices for all Products are F.O.B. Cabletron's designated
      facility with Supplier responsible for all costs of transportation,
      insurance, taxes, customs duties, landing, storage and handling fees, and
      documents or certificates required for exportation or importation.

4.16. Quality Assurance and First Article and Facility Inspection -- Products
      shall be manufactured by or for Supplier in facilities that meet EN ISO
      9001 or


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      EN ISO 9002 standards. Supplier agrees to allow Cabletron to review and
      inspect, during regular business hours and following reasonable notice to
      Supplier, Supplier's manufacturing facilities and quality control
      procedures, both prior to first Product deliveries and periodically
      thereafter for quality control and assurance purposes. Supplier will
      provide Cabletron upon request and reasonable notice with copies of its
      quality control test documents for each Product for Cabletron's review.
      Supplier will provide Cabletron with three (3) units of each Product
      ("First Articles"), without charge, for inspection and testing to verify
      the Product's workmanship and conformance to its functional specifications
      and any test specifications set forth in Exhibit B to this Agreement.
      Within thirty (30) days after its receipt of each First Article, Cabletron
      shall either: (i) provide Supplier written notice of approval for volume
      shipment; or (ii) return the First Articles and provide Supplier with a
      detailed failure report. In the event of a failure, Supplier will use
      commercially reasonable effort to correct any problems found and provide
      Cabletron with an upgraded First Articles for inspection and testing
      pursuant to this Section. After Cabletron has approved volume shipment,
      any Product failure shall be dealt with pursuant to the terms of Article 8
      of this Agreement. All Products delivered to Cabletron under this
      Agreement shall achieve Cabletron's quality standards. In the event that
      any such Products fail to meet said quality standards, or that Supplier's
      physical facilities, quality control procedures, or are determined by
      Cabletron in good faith to be insufficient to insure consistent acceptable
      Product quality, Supplier agrees to modify or correct the Products,
      facilities, or procedures to meet said quality standards, and shall
      provide to Cabletron for its review documentation setting forth the
      corrective action to be implemented in order to bring the Products within
      Cabletron's quality standards. In the event that Supplier fails to effect
      a correction within thirty (30) days, Cabletron may terminate this
      Agreement and cancel all then-outstanding orders for Products without
      liability.

5.  ORDERING & SHIPMENT:

5.1.  Purchase Orders -- All Product Orders from Cabletron shall be dated and
      reference the contract number of this Agreement. No additional or
      different terms on the face or reverse side of any purchase order, or in
      any written communications from Cabletron shall supersede or amend the
      terms of this Agreement, unless such terms are agreed upon in advance, set
      forth in writing and signed by an authorized representative of each Party.

5.2.  Issuance and Acceptance -- Each Order shall contain: (i) a complete list
      of the Products to be purchased specifying quantity, type, description and
      price; (ii) shipment and delivery instructions; and (iii) any special
      terms and conditions agreed to in writing by the Parties. Supplier agrees
      to receive Orders placed by Cabletron via electronic document transfer,
      facsimile, or hard copy only. Verbal or telephone orders must be followed
      promptly by one of the transmission means described above. The Supplier
      must accept all Orders that are within Cabletron's most recent forecast.

5.3.  Right to Cancel or Reschedule -- Cabletron may cancel any Order or
      reschedule the date of the shipment of any Order without penalty provided
      that Supplier receives written notice at least ten (10) Business Days
      prior to the scheduled shipment date.

5.4.  Delivery Schedule -- Cabletron shall receive good title, and Supplier
      shall deliver all Products free and clear of all liens, encumbrances and
      claims. Supplier will use its best efforts to deliver all Products on the
      Product delivery date specified in Cabletron's Order. If Supplier is
      unable to deliver Products within five (5) Business Days of the delivery
      date specified in the Order, Supplier shall be responsible for payment of
      any express delivery charges required to deliver the Product by the
      fastest available method of delivery. If Supplier fails to deliver
      Products within fifteen (15) Business Days of the delivery date specified
      in the Order, Cabletron may, at is sole option, either (i) cancel the
      Order or (ii) accept delivery and receive a credit equal to twenty (20%)
      of the value of the Order.

5.5.  Partial Shipments and Allocations - Supplier shall not make partial
      shipments without Cabletron's express written consent. When Products or
      component parts are in short supply, or on an industry wide allocation,
      Supplier will allocate its available inventory and make deliveries on an
      equitable basis.

5.6.  Carrier & Risk of Loss - Products will be shipped by the carrier
      designated in writing by Cabletron. In the absence of specific shipping
      instructions from Cabletron, Supplier may designate the carrier. Title to
      Products and risk of loss shall pass to


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      Cabletron upon Supplier's delivery to the designated carrier.

5.7.  Packing -- Unless otherwise provided in the Product Specification,
      Products shipped by Supplier will be packed and packaged according to
      Supplier's then current packaging methods for comparable products.

6.  SOFTWARE LICENSE TERMS:

6.1.  License Grant -- Supplier hereby grants Cabletron a nontransferable,
      nonexclusive license to use and distribute Software solely for use by End
      Users in and in connection with their use of Products.

6.2.  Distribution of Software Product - Licensed Software may only be
      distributed subject to appropriate End-User software license terms and
      conditions which accompanies the Product.

7.  PAYMENT:

7.1.  Payment Terms - Supplier's payment terms are net sixty (60) days from the
      date of Supplier's invoice. Cabletron shall promptly pay all invoices and
      amounts due and maintain satisfactory credit arrangements with Supplier.
      All payments shall be made in United States dollars.

8.  WARRANTY TERMS:

8.1.  Product Warranty -- Supplier warrants that Products purchased under this
      Agreement: (i) comply with all applicable federal, state, and local laws,
      rules, regulations and codes; (ii) are free of defects in materials and
      workmanship and will conform to the Product Specifications applicable as
      of the date of Cabletron's Order throughout the Warranty Period; and (iii)
      are Year 2000 Compliant. Software Upgrades and Software Updates released
      by the Supplier during the relevant Products Warranty Period shall be
      available to Cabletron for license to the End User without charge.

8.2.  Repair or Replacement -- Supplier shall repair or replace, at Supplier's
      expense, all Products that fail to meet the applicable Product
      Specifications or other requirements of the foregoing warranty during the
      Warranty Period. Supplier shall at all times keep on hand spare or
      replacement Products and parts in amounts sufficient to repair fully or to
      replace Cabletron's Product forecast for that month as referenced in
      Paragraph 3.2 of this Agreement.

8.3.  Return, Repair or Replacement Procedures--Products shall be returned for
      repair or replacement as follows:

     8.3.1. Supplier will pay all transportation charges for Product returned
            to Supplier under these Product Warranty terms back to Cabletron,
            its Reseller or End User.

     8.3.2. The return of all Products shall be controlled under a Return
            Material Authorization ("RMA") system maintained by Supplier.
            Cabletron must obtain an RMA number prior to returning any Products
            to Supplier and supply Supplier with the following information: (a)
            End User identification; (b) Product serial number; and (c)
            information relating to the failure, including product configuration
            and other failure details.

     8.3.3. Returned Products will be packaged and shipped to Supplier using
            packing materials sufficient to prevent either accidental opening of
            the carton or damage to the Product resulting from normal handling
            during shipment. Supplier will pay shipping costs and bear the risk
            of loss of returning repaired or replaced Products to Cabletron.

     8.3.4. If it is not possible to repair or rework the returned Products
            within ten (10) Business Days, a replacement Product will be shipped
            to End-User, Reseller or Cabletron without cost as instructed.

8.4.  Epidemic Failures - At any time after Cabletron's acceptance of First
      Articles and the commencement of volume shipments of a Product, Cabletron
      may, at its option, inspect and test purchased Products to confirm that
      they meet the applicable Product warranty. With regard to any Product, in
      the event that inspection and testing, whether alone or in conjunction
      with related warranty claims, indicates that the same defect has occurred
      in more than five percent (5%) of the Products manufactured within a one
      (1) month period, or in more than two percent (2%) of the Products
      manufactured within a two (2) month period, the defect shall be considered
      an "Epidemic Failure." In the event that either Party has evidence of an
      Epidemic Failure, Supplier shall promptly (i) correct the cause on all
      Products to be shipped thereafter, and (ii) repair or replace all Products
      shipped within the previous three (3)


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      years, or alternatively pay Cabletron its costs of remedying such
      noncompliance.

8.5.  Warranty Disclaimer -- EXCEPT AS EXPRESSLY PROVIDED HEREIN, NO OTHER
      WARRANTY, EXPRESS OR IMPLIED SHALL APPLY. SUPPLIER SPECIFICALLY DISCLAIMS
      ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      PURPOSE.

9.  SERVICE:

9.1.  End User Support -- Cabletron shall provide all first level End User
      customer support for Products, as defined below, in the same manner
      Cabletron provides similar support for other products. Supplier will
      provide second and third level support, according to the Technical Support
      Guidelines set forth in Exhibit C without additional charge. As used
      herein: (i) First Level Support shall mean services responsive to the End
      User's initial notification that a suspected problem exists with the
      Product, including call logging, validation, determining whether a
      solution is given in User Documentation or Maintenance Documentation, and
      a review of known resolutions for the reported problem; (ii) Second Level
      Support shall mean First Level Support plus services performed in order to
      attempt to reproduce the suspected problem and correct it by means of a
      "fix," or work-around, or in determining that the problem cannot be
      reproduced; and (iii) Third Level Support shall mean services provided to
      the End User to resolve problems that are determined to be or to be likely
      to be the result of one or more design or manufacturing defects or
      interaction between the Product and other materials, and that cannot be
      resolved by the End User. During the first twelve (12) months following
      shipment, this Support as well as Software Updates/Upgrades as specified
      in Section 8.1 and the Services specified in Section 9.2 will be provided
      at no cost. Subsequent to the initial twelve (12) month period following
      shipment, supplier shall provide End User Support and Software
      Updates/Upgrades based on an annual support fee of two percent (2%) of the
      Transfer price only for those Products subject to a Supplier support and
      maintenance agreement sold by Cabletron. The fee will be invoiced
      quarterly in arrears effective January 1, 2000. In the event on-site
      support is required to resolve Customer problems, Supplier shall bare its
      costs of travel and related expenses and such on-site service shall be at
      no additional charge.

9.2.  Technical Information and Training -- Supplier will provide, without
      charge, technical information and training upon request for Cabletron
      employees with regard to each Product to allow Cabletron and its employees
      to become familiar with the Products, and their market, the installation
      of the Products, and enable Cabletron to provide Level One Support. All
      training shall take place at Cabletron's designated facility. Supplier
      shall provide initial Technical Training for up to four (4) Product and
      post sales Training classes, each for North America (East and West coast),
      Europe and PACRIM for up to fifteen (15) students per class. Four (4)
      additional classes will be scheduled within the following six (6) month
      period. Initial Technical Training shall be offered for each future
      Product release at no additional charge. Supplier shall offer additional
      Technical Training classes at Supplier's standard raters, as more fully
      described in Exhibit A. Supplier shall provide all of the equipment and
      documentation necessary to provide Technical Training not described in
      this section 9.2. Any equipment necessary to provide Technical Training
      not described in this section 9.2 shall be the responsibility of
      Cabletron.

9.3.  Additional Support -- Supplier shall negotiate in good faith to provide
      Cabletron with additional maintenance services and support not covered
      under this Agreement pursuant to a separate agreement between the Parties
      upon Cabletron's request.

9.4.  Support Plan -- The Parties agree to the "Support Plan," as outlined in
      Exhibit D. .The Support Plan includes but is not limited to, procedures
      for handling support calls, problem escalation, problem information
      exchange, management of repair services, training and presale technical
      support. Separate Support Plans may be implemented for training, and
      presales technical support.

9.5.  Non-Warranty Repair -- Non-warranty repair services for Products may be
      provided by Supplier at a designated Supplier facility on a time and
      materials basis under Supplier's then standard prices, terms and
      conditions.

9.6.  Post Warranty Service Agreements - At Cabletron's request, Supplier may
      agree to offer post-warranty service agreements for Products to End Users
      on terms and conditions comparable to those in service agreements Supplier
      provides on comparable Supplier branded products.


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10. INTELLECTUAL PROPERTY:

10.1. Ownership - Unless expressly stated, nothing in this Agreement shall grant
      Cabletron a license to use or any other right, title or interest in any
      Supplier Intellectual Property Right, and all such Intellectual Property
      Rights shall remain the exclusive property of Supplier.

11. DURATION AND TERMINATION:

11.1. Term - The initial term of this Agreement shall be the two (2) year period
      commencing on the Effective Date and terminating on the date exactly two
      (2) years after the Effective Date unless earlier terminated pursuant to
      the terms of this Agreement. This Agreement shall automatically renew for
      additional one (1) year periods upon the same terms and conditions as set
      forth herein unless, within not less than thirty (30) days prior to the
      expiration of the then current term, either party should notify the other
      of its intent not to so renew.

11.2. Termination for Cause - This Agreement may be terminated upon the
      occurrence of any of the following events: (i) by Supplier, immediately
      upon written notice, should Cabletron fail to pay any sums due hereunder
      within thirty (30) days of the due date thereof; or (ii) by either Party
      should the other Party commit a material breach of any obligation under
      this Agreement not specifically set out in this Section or any other
      Agreement between the parties and fail to cure such material breach within
      thirty (30) days after written notice to the defaulting party (hereinafter
      the "Default Notice"); or (iii) by either Party, immediately, upon the
      insolvency of the other party, the appointment of a liquidator, receiver,
      administrative receiver or administrator for the other party, or an
      assignment by the other party for the benefit of creditors.

11.3. Termination for Convenience -- Cabletron may terminate this Agreement for
      any reason by providing Supplier with at least ninety (90) days prior
      written notice.

11.4. Effects of Termination - Upon any termination of this Agreement, Cabletron
      shall: (i) refrain from submitting additional Product Orders; (ii)
      promptly pay for any Products which Cabletron has received but has not yet
      paid Supplier; and (iii) at its option, offer Supplier the ability to
      repurchase at the original invoice price all or any portion of the
      Products in Cabletron's inventory.

11.5. Limits of Liability for Termination - In the event this Agreement is
      terminated, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR COMPENSATION,
      REIMBURSEMENT OR DAMAGES ON ACCOUNT OF THE LOSS OF PROSPECTIVE PROFITS OR
      ANTICIPATED SALES, OR ON ACCOUNT OF EXPENDITURES, INVESTMENTS, LEASES OR
      COMMITMENTS IN CONNECTION WITH THE BUSINESS OR GOOD WILL OF SUPPLIER OR
      CABLETRON, OR FOR ANY OTHER REASON RELATING TO OR ARISING FROM SUCH
      TERMINATION.

11.6. Post Termination Support - The termination of this Agreement shall not
      relieve Supplier of its Warranty obligations under Article 8 of this
      Agreement with regard to Products sold by Cabletron to End Users prior to
      the date of termination, and Supplier shall continue to provide the
      technical support described in Article 9 of this Agreement for five (5)
      years following the date of termination.

12. CONFIDENTIAL AND PROPRIETARY INFORMATION:

12.1. Disclosure of Information - It is expected that Supplier and Cabletron may
      each disclose to the other proprietary or confidential information. For
      purposes of the following, the Party disclosing the Confidential
      Information is the "Discloser" and the Party receiving the Confidential
      Information is the "Recipient".

12.2. Confidential Information - "Confidential Information" shall mean any and
      all information of the Discloser that is not generally known by others
      with whom it competes or does business, and any and all information,
      publicly known in whole or in part or not, which, if disclosed would
      assist in competition against Discloser. Confidential Information includes
      without limitation such information relating to: (i) the technical
      specifications of the Products; (ii) the development, research, testing,
      marketing and financial activities of the Discloser; (iii) the identity
      and special needs of the customers or suppliers of the Discloser; and (iv)
      the people and organizations with whom the Discloser has business
      relationships and those relationships.

12.3. Ownership and Non-Disclosure - All Confidential Information acquired by
      Recipient or its employees or agents shall remain Discloser's exclusive
      property, and Recipient shall use its best efforts


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Contract Number 99-OEMB-1206-1930
<PAGE>

      (which in any event shall not be less than the efforts Recipient takes to
      ensure the confidentiality of its own proprietary and other confidential
      information) to keep, and have its employees and agents keep, any and all
      such information and data confidential, and shall not copy or publish or
      disclose it to others, or authorize its employees, or agents or anyone
      else to copy, publish, or disclose it to others, without Discloser's prior
      written approval, and shall return such information and data to Discloser
      at its request. Recipient shall only use any Confidential Information in
      connection with its performance under this Agreement.

12.4. Exception - The confidentiality provisions in this Section will not apply
      to information which is or which becomes generally known to the public by
      publication or by any means other than a breach of duty by a Party to this
      Agreement.

12.5. Disclosure to Agent - Cabletron may disclose Supplier Confidential
      Information to third-party agents working under Cabletron's direction,
      provided that the agent executes an appropriate non-disclosure agreement
      with Cabletron that prohibits further disclosure of Supplier Confidential
      Information.

12.6. Post Termination -- Except to the extent necessary to fulfill ongoing
      product support obligations or as otherwise provided herein, upon
      termination or expiration, Cabletron shall deliver to Supplier all
      material furnished by Supplier and pertaining to Products, which is then
      in the possession of Cabletron, and shall not retain copies of the same.
      Except as provided herein, upon termination or expiration, Supplier shall
      deliver to Cabletron all material furnished by Cabletron, which is deemed
      confidential hereunder.

13. INDEMNIFICATIONS:

13.1. Indemnification by Supplier - Supplier shall defend, at Supplier's
      expense, any claim brought against Cabletron, its employees, agents,
      Resellers or End Users (a "Claim Defendant") alleging that any Product
      acquired or licensed under this Agreement infringes any patent, copyright,
      trademark, mask work right or comparable right (hereinafter a "Claim").
      Supplier shall pay all costs and damages awarded or agreed to in
      settlement, provided that the Claim Defendant gave Supplier prompt written
      notice of the Claim, reasonable assistance and sole authority to defend or
      settle the Claim. Supplier shall obtain for the Claim Defendant, the right
      to continue using the Product, replace or modify the Product so it becomes
      non-infringing. If such remedies are not reasonably available, Supplier
      shall refund to Cabletron the price paid for the Product and Cabletron
      shall return the Product to Supplier.

13.2. Products Liability - Supplier shall defend, at its expense, any claim
      brought against Cabletron, its employees, agents, Resellers or End Users
      ("Claim Defendant") that arise out of or result from injuries or death to
      persons or damage to property directly or indirectly caused by the use of
      the Products, including claims that the Products were defective or were
      not safe for their intended use, whether such Products or the parts
      thereof were furnished by Supplier or its subcontractors ("Products
      Liability Claim"), provided that the Claim Defendant gave Supplier prompt
      written notice of the Products Liability Claim, reasonable assistance and
      sole authority to defend or settle the Products Liability Claim. Supplier
      shall carry and maintain general and products liability insurance coverage
      in an amount no less than two (2) million dollars ($2,000,000.00)
      applicable to the Supplier's obligation under this section.

14. LIMITATION OF LIABILITY:

14.1. Limitation of Liability - IN NO EVENT SHALL EITHER PARTY OR THEIR
      AFFILIATES, OFFICERS, DIRECTORS, AGENTS, OR EMPLOYEES BE LIABLE TO THE
      OTHER PARTY OR END USERS FOR ANY INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
      DAMAGES, INCLUDING WITHOUT LIMITATION, LOSS OF DATA OR PROFITS OR
      ATTORNEY'S FEES, WHETHER CLAIMED BY REASON OF BREACH OF WARRANTY, IN TORT
      OR OTHERWISE, AND WITHOUT REGARD TO THE FORM OF ACTION IN WHICH SUCH CLAIM
      IS MADE. IN ANY EVENT, CABLETRON'S LIABILITY SHALL BE LIMITED TO ONE
      MILLION UNITED STATES DOLLARS ($1,000,000) OR THE EQUIVALENT IN FOREIGN
      CURRENCY.

15. DISPUTE RESOLUTION:

15.1. Consultation and Review -- The Parties shall make good faith efforts to
      resolve all disputes arising under this Agreement through consultations.
      If consultations are unsuccessful in resolving any dispute, either Party
      may request a senior management review. Within ten (10) Business


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 8
Product Reseller Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

      Days of any such request, designated vice presidents of Supplier and
      Cabletron will meet in a mutually acceptable fashion to exchange relevant
      information and attempt to resolve the dispute.

16. GENERAL TERMS:

16.1. Import and Export - Certain Products may be subject to export or import
      control laws and regulations of the U.S. government and other governments.
      Cabletron assures that Cabletron and Resellers will comply with those
      regulations at their expense whenever they export or re-export controlled
      products or technical data obtained from Supplier or any product produced
      directly from the controlled technical data. Cabletron shall hold harmless
      and indemnify Supplier from any damages, including attorneys' fees, and
      any government sanctions resulting to Supplier from a breach of this
      Section.

16.2. Assignment - This Agreement may not be assigned or transferred in whole or
      in part by either party without the consent of the other, provided that
      Cabletron may assign this Agreement without Supplier's consent to any
      person or entity that acquires substantially all of the stock of Cabletron
      or the assets of Cabletron, or any applicable major division, unit, or
      subsidiary of Cabletron.

16.3. Confidentiality of Agreement - The Parties acknowledge and agree that the
      terms of this Agreement are confidential, and, except as may be required
      by law or in response to valid judicial or administrative process, may not
      be provided or disclosed to third parties without the other Party's
      consent.

16.4. Waiver and Severability -- A Party's failure to enforce any provision of
      this Agreement shall not be deemed a waiver of that or any other provision
      of this Agreement. If any provision of this Agreement has been declared
      illegal, invalid or unenforceable, the provision shall be construed to be
      enforceable to the maximum extent permitted and, if not, shall be deemed
      deleted from this Agreement, provided that if such construction or
      deletion substantially alters the commercial basis of this Agreement, the
      Parties shall negotiate in good faith to amend the provisions of this
      Agreement to give effect to their original intent.

16.5. Force Majeure - Neither Party shall be liable for any damages or penalties
      for delay in performing its obligations under this when such delay is due
      to the elements, acts of God, acts of the other Party, acts of civil or
      military authority, fires, or floods, epidemics, quarantine restrictions,
      war, riots, strikes, lockouts or other labor disputes, delays in
      transportation, delays in delivery by vendors, or any other causes,
      without limitation, which are beyond the reasonable control of the delayed
      Party.

16.6. Survival -- Appropriate provisions of this Agreement, including but not
      limited to the following, shall survive the expiration or termination of
      this Agreement: Definitions; Right to Manufacture; Ordering and Shipment;
      Software Terms; Payment; Warranty Terms; Service, Intellectual Property;
      Duration and Termination; Confidential and Proprietary Information;
      Indemnifications; Limitation of Liability; and General Terms.

16.7. Laws -- This Agreement and all Orders shall be governed by the laws of the
      State of New Hampshire, U.S.A., regardless of the laws that might
      otherwise govern under applicable conflicts and choice of laws principles.
      The courts of New Hampshire shall have jurisdiction concerning all matters
      pertaining to this Agreement. To the extent not prohibited by applicable
      law that cannot be waived, and provided with regard to clause (c) of this
      sentence that any suit, action or other proceeding arising out of, based
      upon, or relating to this Agreement or the construction, negotiation or
      performance of this Agreement (an "Action") in question is pending in one
      of the state and federal courts located in New Hampshire (collectively,
      the "Courts"), each party waives, and agrees not to assert in any Action:
      (a) ANY RIGHT TO TRIAL BY JURY IN RESPECT OF ANY ISSUE OR CLAIM THAT MAY
      ARISE IN THE ACTION; (b) any claim or defense that this Agreement or this
      relationship is governed by or is subject to any alleged fiduciary duty or
      any alleged implied covenant of good faith and fair dealing; and (c) any
      claim or defense that the Court in question does not have personal
      jurisdiction, may not attach or permit execution upon each party's
      property, or is an improper venue or an inconvenient forum. Any Action
      against Cabletron must be brought within twelve (12) months after the
      cause of action arises.

16.8. Relationship of the Parties - Except as expressly provided in this
      Agreement, neither Party shall hold itself out as, the representative,
      agent, commission-sales agent, franchisee or employee of the other Party
      for any purpose. This Agreement creates no relationship of joint venture,
      franchise or partnership, and neither Party has any right or


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 9
Product Reseller Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

      authority to assume or to create any obligation or responsibility on
      behalf of the other Party.

16.9. Entire Agreement - This Agreement, its Exhibits and attachments, including
      all documents which are incorporated by reference, constitute the entire
      and only understanding between the Parties. Unless otherwise provided
      herein, no modifications to this Agreement shall be binding on either
      Party unless made in writing and signed by duly authorized representatives
      of both Parties. In the event of any conflict between this Agreement, and
      any Addendum, Exhibits, or other attachments, the terms of this Agreement
      shall govern.

16.10. Notices - Where electronic communication is available, Supplier and
      Cabletron may communicate with each other by electronic means. Supplier
      and Cabletron agree that when electronic communications are used, they are
      the equivalent of written and signed documents except for Notices given
      under this Agreement which if transmitted electronically, shall also be
      sent via facsimile transmission (with a copy by U.S. mail or overnight
      courier (signature required)). Notices shall be deemed effective upon
      receipt or refusal to accept delivery. Routine business communications
      shall not be deemed to be Notices. All such notices shall be in English
      and addressed as follows:

If to Cabletron:

Cabletron Systems, Inc.
35 Industrial Way
Rochester, New Hampshire, USA 03867

Attention:________________________
Facsimile Number: ________________

With a copy to:

Cabletron Systems, Inc.
35 Industrial Way
Rochester, New Hampshire, USA 03867
Attention: Legal Department
Facsimile Number: 603-337-3295

If to Supplier:

____________________________

____________________________

____________________________


Attention: ___________________________
Facsimile Number: ____________________

With a copy to:


____________________________


IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by
their duly authorized representatives.

CABLETRON                               SUPPLIER


By: /s/ Daniel J Harding                By: /s/ Stephen A. Ide
    --------------------------              --------------------------

Name: Daniel Harding                    Name: Stephen A. Ide
      ------------------------                ------------------------

Title: VP of Business Dev.              Title: President
       -----------------------                 -----------------------

Date: 2/2/00                            Date: 2/2/00
      ------------------------                ------------------------


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 10
Product Reseller Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

                      CABLETRON PRODUCT RESELLER AGREEMENT

                        EXHIBIT A -- PRODUCTS AND PRICES

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
Part Number  Description                                Interspeed list     Cabletron      Price to       Standard      Premium
                                                                             Discount     Cabletron     Maintenance   Maintenance
                                                                                                            Price        Price
------------------------------------------------------------------------------------------------------------------------------------
<S>          <C>                                              <C>             <C>            <C>             <C>          <C>
600-00012    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
600-00010    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
600-00011    ***                                               ***             ***            ***             ***          ***
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600-00013    ***                                               ***             ***            ***             ***          ***
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610-00010    ***                                               ***             ***            ***             ***          ***
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610-00011    ***                                               ***             ***            ***             ***          ***
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610-00016    ***                                               ***             ***            ***             ***          ***
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610-00017    ***                                               ***             ***            ***             ***          ***
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610-00018    ***                                               ***             ***            ***             ***          ***
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610-00013    ***                                               ***             ***            ***             ***          ***
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605-00012    ***                                               ***             ***            ***             ***          ***
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530-00010    ***                                               ***             ***            ***             ***          ***
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605-00013    ***                                               ***             ***            ***             ***          ***
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530-00011    ***                                               ***             ***            ***             ***          ***
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605-00022    ***                                               ***             ***            ***             ***          ***
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605-00011    ***                                               ***             ***            ***             ***          ***
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510-00010    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
810-00010    ***                                               ***             ***            ***             ***          ***
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810-00011    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
610-00014    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
610-00019    ***                                               ***             ***            ***             ***          ***
------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                            CATEGORY D - ***
***
--------------------------------------------------------------------------------
***                                                                      Page 11


***This information has been omitted pursuant to a request for confidential
   treatment, and has been filed separately with the Securities and Exchange
   Commission.

<PAGE>

                      CABLETRON PRODUCT RESELLER AGREEMENT

              EXHIBIT B -- PRODUCT QUALITY AND TEST SPECIFICATIONS

1 INTRODUCTION

1.1 Purpose - The purpose of this exhibit is to define the general QA provisions
for Supplier as a Product supplier to Cabletron.

1.2 Scope - The scope of this exhibit is to define requirement and control for

o    Quality system for production
o    First article qualification
o    Acceptable quality level
o    Inspection and testing standards
o    Inspection and testing procedures
o    RMA procedures and controls
o    Product traceability
o    Corrective action system
o    Market (end customer) complaint system

2 QA PROVISIONS

2.1 Quality System for Production

It is required that all products marketed by Cabletron are manufactured under a
quality system in accordance with the international standard EN ISO 9002 (or EN
ISO 9001).

Supplier must supply a valid certificate to Cabletron QA for documentation of
the above requirement and a statement that all products under this Cabletron
Agreement will be produced at the certified manufacturing facility.

2.2 First Article Qualification

Cabletron will perform a 100% qualification of the first production lot shipped
to Cabletron.

The verification will be based on a 100% visual inspection for verification of
workmanship quality and a 100% functional test for verification of the
functional specification. The requirements for visual and functional quality are
specified in the section 2.4 below.

A first article qualification report (FAQ) will be prepared by Cabletron and the
report will be returned to Supplier for indication of the results and, if
required, request for corrective action.

The approval for volume shipment will be granted based on Cabletron QA approval
of the first article lot.

Supplier may be requested for additional regulatory and/or technical
documentation for Cabletron to conclude the FAQ evaluation.

2.3 Acceptable Quality Level

Cabletron shall inspect incoming Products according to the following AQL values
for major/minor errors: 0.25/1.0.

The inspection and testing shall be performed in accordance with MIL-STD 105E,
General Inspection Level 2, using single sampling plans for Normal, Reduced or
Tightened inspection as applicable. Based on the outcome of the inspection and
test Cabletron shall accept or reject the product lot in question.


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 12
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

If the lot is rejected under Tightened inspection and based on the rejection
statistics, resulting in a Discontinuation, Cabletron will Discontinue
inspection of the Product and require documented corrective actions initiated
from Supplier in order to resume inspection using Tightened inspection sample
plans.

2.4 Inspection and Testing Standards

QA inspection performed by Cabletron will be covering both a visual and
functional audit of received product lots.

The visual inspection will be performed in accordance with the following
international industry standards:

o    IPC-A-610, "Acceptability of Electronic Assemblies', latest version.
o    IPC-A-600, "Acceptability of Printed Boards", latest version.

The products are considered as class 2 products ("Dedicated Service Electronics
products") when using the IPC specifications.

Functional test will be performed with test software and test set-up as used and
specified by either Cabletron or Supplier.

If the test set-up and test software is specified by Cabletron then Supplier
shall provide Cabletron with a detailed test set-up specification and test
software for Cabletron review and acceptance, prior to first shipment of
products.

Cabletron shall, in good faith, review and comment the test set-up and test
software for adequacy and completeness prior to acceptance.

Cabletron reserves the right to perform, or contract a third party to perform, a
source inspection of Supplier's manufacturing facilities upon a fourteen (14)
day notice to Supplier. The inspection will not take place during the last week
of Supplier's financial quarter.

2.5 Inspection and testing Procedures

Functional defects identified by Cabletron according to the requirement
standards mentioned above shall be considered as major defects. Visual defects
classified by the IPC standards as "non-conforming defects" shall be considered
as major defects. "Non-conforming process indicators" shall be considered as
minor defects.

If a Product-lot is rejected during inspection, Cabletron must in agreement with
Supplier, select one (1) of the following alternatives for handling of the
rejected lots:

(A): Cabletron returns the entire rejected lot to Supplier at no cost to
Cabletron. Supplier must replace the rejected lot within no more than thirty
(30) days from the date of the rejection notified by letter or telefax.
Furthermore, Supplier will reimburse freight and duty charges as applicable paid
by Cabletron for the transportation of the rejected lot.

(B): Representatives from Supplier must perform 100% inspection and test of all
Products in the rejected lot. The testing will take place at Supplier premises
utilizing, if necessary, Supplier's test equipment at no expense to Cabletron
Systems. All Products failing this test will be returned at Supplier's expense
to Supplier for fault analysis and corrective actions. Supplier must replace the
rejected Products within no more than thirty (30) days from the date of
rejection.

(C): Representatives from Cabletron will perform 100% inspection and test of all
Products in the rejected lot and will charge Supplier for the screening time
used. All Products failing this test will be returned at Supplier' expense to
Supplier for fault analysis and corrective actions. Supplier must replace the
rejected Products within no more than thirty (30) days from the date of
rejection.


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 13
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

As one of the three alternatives has been completed, the rejected lot shall
undergo a re-inspection. Cabletron, will at his own discretion, determine
whether re-inspection shall include all types or classes of defects or just the
particular types or classes of defects which caused initial rejection.
Re-inspection will be performed using the sample plans used for the proceeding
inspection of the rejected lot.

2.6 Return Material Authorization Procedures

All returned Products shall be controlled under a Return Material Authorization
(RMA) system maintained by Supplier. Cabletron shall obtain an RMA-number prior
to returning any products to Supplier. Supplier shall provide a complete failure
analysis within ten (10) business days.

Cabletron must supply the following RMA information to Supplier

Customer identification
Serial number of the product
Failure information (system setup, failure details, etc.)

Products must be packaged and shipped to Supplier using packing materials
sufficient to prevent either accidental opening of the carton or damage to the
equipment resulting from normal handling during shipment. Cabletron is
responsible for shipping charges to Supplier except as set forth in section 2.5.
Supplier will pay shipping costs and bear the risk of loss of sending such
repaired or replacement equipment back to Cabletron.

Upon receiving the RMA products at Supplier, a credit note must be issued to
Cabletron. If it is not possible to repair/rework the RMA products within five
(5) working days, a replacement shipment must be returned to Cabletron without
any cost related to Cabletron.

Supplier must report the test, debug and repair/rework results to Cabletron as
soon as these data have been collected.

2.7 Product Traceability -- Supplier shall adhere to the product traceability
requirements of Cabletron described below.

Production: Supplier shall establish an internal system to allow traceability of
all units (marked by unique serial number) to specific production lots (or
batches). This will allow Cabletron to trace all units from one (1) production
lot based on one (I) defective unit returned from a customer.

Materials: Supplier shall have established an internal system to allow
traceability from production lots to material lots used in that production lot,
This will allow traceability of specific defective materials reported from a
customer or identified elsewhere.

Shipment: Supplier shall include production lot and serial number documentation
with all shipments to Cabletron. Individual shipments shall be divided by
production lot and thus enable Cabletron to segregate Supplier production lots
warehouse wise. All shipments received at Cabletron will be identified by a
unique Cabletron batch number.

2.8 Corrective Action System

Supplier shall have a corrective action system established in order to handle
request from Cabletron in regard to e.g. production quality, test problems, RMA
products or other related quality problems related to the product. The
corrective actions should be taken within the time frames specified below
depending on the severity of the issue.

         Severity/Category 1 - 48 hours
         Severity/Category 2 - 5 days
         Severity/Category 3 - 10 days

Supplier shall allocate adequate resources to handle this task. The names of the
contact persons available to Supplier are listed in Exhibit C of this Agreement.


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 14
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

2.9 Market (Customer) Complaints

In cases of customer complaints from the market, Cabletron request that Supplier
allocates resources (i.e. a contact person) in order to initiate root cause
analysis and to implement corrective actions, if required, in consultation and
cooperation with Cabletron.

Cabletron will be responsible for all contact with the customer. Cabletron will
be responsible for all corrective actions and related tasks to be performed in
that regard.

2.10 Engineering Change Order (ECO) Control

All products will be under strict ECO control by Cabletron Systems.

Supplier must submit all proposed ECOs and Product deviations to Cabletron for
review and approval.

Cabletron will either approve or deny all submitted ECOs in writing within
fourteen (14) days from the date of receipt of all materials associated with the
ECO.

Supplier may not implement any ECO or deviation to the affected Product(s)
unless it receives written approval from Cabletron Systems.

In case of a mandatory ECO to the rebranded Product, it is Supplier's
responsibility to initiate, organize and perform any necessary product call
backs from the field. It is also Supplier's responsibility to perform all rework
necessary on all affected units in stock or called back.


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 15
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

                      CABLETRON PRODUCT RESELLER AGREEMENT

                    EXHIBIT C -- TECHNICAL SUPPORT GUIDELINES

Nature of Technical Support - During the term of this Agreement, Supplier will
assist Cabletron in the identification and resolution of Product performance
problems and errors. Supplier's technical support shall be Level 2 and 3 Support
to Cabletron in connection with its support of its Resellers and End Users.
Level 1 Support and Level 2 Support shall be the sole and exclusive
responsibility of Cabletron and its Resellers. Level 2 and 3 Support shall be
provided by Supplier only to engineering personnel designated by Cabletron who
are trained in the technical operation of the Product. Supplier's support will
be provided in accordance with the following guidelines:

1.    Technical Support

1.1   Availability - Supplier shall provide non-emergency Level 2 and 3 Support
      via telephone, facsimile and electronic during the hours of 8:00 AM to
      8:00 PM EST, Monday through Friday, In addition, Supplier agrees to
      provide emergency technical support via telephone, facsimile, or pager
      access twenty-four hours (24) per day, seven (7) days per week.

1.2   End User - Cabletron shall use reasonable efforts to attempt to resolve
      End User support requirements for the Products. If Cabletron cannot
      successfully resolve an issue within a reasonable period of time,
      Supplier's technical support staff will provide assistance. Supplier will
      provide an initial response to all Cabletron support requests within two
      (2) hours, and Cabletron and Supplier will mutually agree, in good faith,
      what additional information or documentation will be required for
      resolution of the problem. Supplier will provide a problem report form for
      Cabletron's use in reporting problems.

2.    Error Correction

2.1.  Error Definitions - "Error" means a reproducible that causes a Product not
      to function substantially in conformance with its specifications. Errors
      are classified as follows:

      Category 1: End User's network segment or management application is down
      or experiencing a consistent, measurable performance impact with no
      immediate resolution available.

      Category 2: End User is experiencing intermittent failure, performance
      degradation, or functionality of network or management applications.

      Category 3: Issues that do not affect customer's normal network or
      management application operation or questions concerning Product
      functionality or usage.

2.2.  Non-Emergency Technical Support - For End User or Reseller problems not
      deemed by Cabletron to be an emergency, Supplier will use its best efforts
      to address and resolve the problems as quickly as practicable during
      business hours. If a particular problem is not resolved within two (2)
      Business Days following the initial call to Supplier, technical support
      managers and engineers for each Party, will discuss and work in good faith
      to devise and implement a satisfactory resolution. Problems regarded as
      non-emergencies include: (i) installation and operation problems, i.e.
      routine questions that can be resolved by following documentation; and
      (ii) deviations from documentation, omissions and known workarounds, i.e.
      problems that cannot be resolved by following the documentation or result
      from reasonable misinterpretation of the documentation.

2.3.  Emergency Technical Support - Supplier acknowledges that Category I and
      Category 2 Errors should be resolved quickly. During the applicable
      Warranty Period, Supplier shall replace any defective Products or correct
      Errors promptly following receipt of notice from Cabletron, not to exceed
      the following:

      o     Supplier shall provide an initial response to Errors reported by
            Cabletron during business hours within two (2) hours and Cabletron
            and Supplier shall promptly agree in good faith to any additional
            information and documentation that may be required to permit
            Supplier to resolve such errors. The error correction period begins
            after Cabletron has enough information to profile the error and can
            recreate the error or has access to a facility where the error can
            be


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 16
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

            recreated.

      o     Supplier shall use its best efforts to resolve Category I Errors
            within two (2) working days of receipt of notice of such Error.

      o     Supplier shall use its best efforts to resolve Category 2 Errors
            within five (5) working days of receipt of notice of such Error.

      o     Supplier shall use its best efforts to resolve Category 3 Errors
            within fifteen (15) working days of receipt of notice of such Error.

      The prescribed Error correction periods above may be extended by agreement
      of the Parties, e.g., if resolution of problem requires hardware
      certification or test, or if resolution represents significant risk to the
      primary Product functions.

2.4.  Support Reports and Evaluation - Supplier shall provide a reporting
      mechanism by which Cabletron will regularly receive a detailed list of the
      status of all Errors reported and resolved, including a list of
      workarounds and bug-fixes. At least once during each calendar quarter, the
      Parties shall hold management-level meetings to discuss improvements in
      support.

3.    Technical Support Hotline

Cabletron shall make all requests for technical support to the following hotline
telephone or facsimile number, or via the Internet to the address indicated:

     Supplier Technical Hotline contacts as follows:

     Telephone No. ___________________________
     Facsimile No. ___________________________
     Electronic Mail: _______________________@________________________
     Designated Senior Support Manager:_______________________________

Supplier may change contact telephone numbers, facsimile numbers, or Internet
addresses on ten days' notice.


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 17
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930
<PAGE>

                      CABLETRON PRODUCT RESELLER AGREEMENT

                          EXHIBIT D -- SERVICE SUPPORT

1.0      Purpose -- The purpose of this Exhibit is to define the Service and
         Support Plan

2.0   Scope -- The scope of this Exhibit is to define requirements and control
      for

o     Standard Support Service
o     Premium Support Service
o     Out of Warranty Service
o     On-site Support
o     On-site Product Installation and Setup
o     Product Documentation
o     Customer Training
o     Service and Support Pricing

3.0      Standard Support Service-- included with purchase of product
o     1-year hardware warranty
      -     Expedited, next day replacement -- first 90 days
      -     Repair or replace with guaranteed 10 day turnaround -- after 90 days
            (and renewals)
o     1-year software warranty
      -     All new software releases, including feature enhancements -- first
            90 days
      -     Best efforts defect correction -- after 90 days (and renewals)
o     1-year remote technical support -- level 2 and level 3
      -     Phone support with guaranteed 1-hour response during normal hours
            (Monday-Friday 8:00 AM -- 5:00 PM EST). Next business day AM
            response after hours.
      -     E-mail support (support@interspeed.com) with guaranteed next
            business day response
      -     Secure support Web site offering downloadable software updates,
            product bulletins, full "pdf" product documentation, frequently
            asked questions, solution database, etc.
o     Renewable on an annual basis thereafter

4.0      Premium Support Service- offered as first year upgrade, subsequent
         year option
o     1-year remote technical support -- level 2 and level 3
      -     Toll free phone support with guaranteed 1-hour response during
            normal hours (Monday-Friday 8:30 AM -- 5:30 PM EST, 2-hour best
            efforts response after hours
      -     Remote configuration assistance after initial installation
      -     E-mail support (support@interspeed.com) with guaranteed next
            business day response
      -     Secure support Web site offering downloadable software updates,
            product bulletins, full "pdf" product documentation, frequently
            asked questions, solution database, etc.
o     1-year software warranty
      -     All new software releases, including feature enhancements
o     1-year hardware warranty
      -     Expedited, next day replacement
o     *** on-site support and installation
o     Renewable on an annual basis

5.0      Out of Warranty Service -- offers full lifetime support on a "time and
         materials" payment basis

o     Hardware repairs at *** of prevailing List Price for 30-day turnaround,
      *** of prevailing List for next day replacement. Repaired parts carry a -
      year warranty
o     New software releases available -- priced individually based on value of
      enhancements
o     Toll free phone support available at prevailing hourly rate for problem
      isolation, research, and resolution
o     E-mail support (support@interspeed.com) with best efforts response, not to
      exceed second business day, at no charge


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 18
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930


***This information has been omitted pursuant to a request for confidential
   treatment, and has been filed separately with the Securities and Exchange
   Commission.


<PAGE>

6.0      On-Site Support
o     In the unlikely event that remote technical support is not sufficient to
      allow a customer to diagnose and correct product-related problems, an
      Interspeed technician will be available on a best efforts basis to travel
      to the customer's site and resolve the problem.
o     This support will be billed on a time and expenses basis.

7.0      On-Site Product installation and Setup
o     Although documentation and remote support should be sufficient to allow
      most customers to successfully install our products, Interspeed
      installation technicians will be available on a scheduled basis to travel
      to the customer's site for installation and configuration of the units.
o     Installation will be billed either on a time and expenses basis, or at a
      fixed price (based on product configuration) and expenses basis.

8.0      Product Documentation
o     Additional hardcopy documentation can be purchased at any time at the
      prevailing List Price.
o     On-line "pdf"-formatted product documentation will be available to all
      customers covered by Standard or Premium Support Services.

9.0      Customer Training
o     Customer training on installation, configuration, maintenance, and
      troubleshooting of Interspeed products will be offered on a periodic basis
      at Interspeed's headquarters.
o     An Interspeed trainer will also be available to deliver the training
      course at a customer's location
      -     A flat fee, plus expenses, will be charged, with a maximum class
            size of 12 students

10.0     Support Service Pricing

In order to provide uniform service to a customer with a minimum of
administrative overhead, we will require that each customer select a single
support service level for all the Interspeed equipment in their inventory, that
is, Standard, Premium, or none. Pricing will be based on a percentage of the
purchase price of all the equipment previously purchased. Two invoicing
strategies will be utilized:
            o     First year upgrade to Premium Support Service will be invoiced
                  with the initial purchase.
            o     Renewal support will be calculated and invoiced annually,
                  coincident with the anniversary of the first equipment
                  purchased by the customer.

--------------------------------------------------------------------------------
                      1.1 First Year                  1.2 Annual Renewal
                      --------------                  ------------------
--------------------------------------------------------------------------------
1.3 Standard Support     ***                            ***
--------------------------------------------------------------------------------
1.4 Premium Support      ***                            ***
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------
1.5 Additional Services                       1.6 Price to Cabletron
-----------------------                       ----------------------
----------------------------------------------------------------------------------------------
<S>                                               <C>
Hardware Repairs -- next day replacement           ***
----------------------------------------------------------------------------------------------
Hardware Repairs -- 30 day turnaround              ***
----------------------------------------------------------------------------------------------
On-Site Support                                    ***
----------------------------------------------------------------------------------------------
On-Site Product Installation and Setup             ***
----------------------------------------------------------------------------------------------
Customer Training at Interspeed                    ***
----------------------------------------------------------------------------------------------
Customer Training On-site                          ***
----------------------------------------------------------------------------------------------
</TABLE>


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                        Page 19
Product Agreement (Draft 12/29/99)
Contract Number 99-OEMB-1206-1930


***This information has been omitted pursuant to a request for confidential
   treatment, and has been filed separately with the Securities and Exchange
   Commission.



<PAGE>

                                      RIDER
                                       TO
                      CABLETRON PRODUCT RESELLER AGREEMENT
                                     BETWEEN
                             CABLETRON SYSTEMS, INC.
                                       AND
                                INTERSPEED, INC.

      This Rider to Cabletron Product Reseller Agreement (the "Agreement") dated
as of the 1st day of February, 2000, by and between INTERSPEED, INC.
("Supplier") and CABLETRON SYSTEMS, INC. ("Cabletron").

      Any capitalized terms defined in the Agreement, when used herein, shall
have the same meanings as are ascribed to them in the Agreement, except as
otherwise defined herein.

      Section 2. of the Agreement entitled "Relationship" is hereby amended by
adding the following new Section 2.4 immediately following Section 2.3 of said
Section: "Supplier licenses Cabletron to use its trademarks in conjunction with
the resale of Products. Cabletron must resell products under Supplier's name and
not any other name provided (a) Cabletron shall make no modification of
Suppliers mark, and shall make no use of it in combination with other material
so as to create a compound mark; (b) all use by Cabletron accrues to Suppliers
benefit; (c) Cabletron shall not register suppliers mark in any jurisdiction;
(d) all marketing and advertising materials featuring Suppliers mark shall be
submitted to Supplier for prior approval; (e) Supplier's mark can be used only
in resale of Suppliers products, and shall not be associated with any other
products in any way."

      Section 2.3 of the Agreement entitled "Channel Conflict Mitigation" is
hereby amended by deleting therefrom the phrase "sold by Cabletron pursuant to
this Agreement. Supplier's sales force in the territory in which the Product is
sold shall be compensated fully through ordinary commission and revenue
retirement for such Product sale, as though it had been made by Supplier's sales
force" and by substituting therefore the phrase "orders placed pursuant to this
Agreement as a result of such cooperative sales efforts in existing Cabletron
accounts or as a result of a Cabletron lead, shall be fulfilled through
Cabletron".

      Section 3.1 of the Agreement entitled "inventory" is hereby amended by
deleting therefrom the phrase "twice" where it appears in the second sentence of
said Section.

      Section 4,4 of the Agreement entitled "Right to Manufacture" is hereby
deleted in its entirety and amended by substituting the following new paragraph:

"If Supplier:

(a) implements a Product withdrawal without making available a functionally
equivalent or superior product, on reasonable commercial terms, that is required
by Cabletron to support expansion of networks deployed by its
customers/end-users in which Products are already in use;

(b) is consistently and unreasonably unable or unwilling to deliver to Cabletron
the quantities of Contractual Products forecasted and ordered by Cabletron as
provided for in this Agreement and accepted


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 1
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903
<PAGE>

by Supplier as provided for in this Agreement within sixty (60) days of the
delivery dates set out in section 5 of this Agreement;

(c) ceases or is unwilling, without a cause attributable to wrongful acts of
Cabletron under this agreement, to provide commercially adequate support or
maintenance for the products in accordance with the terms and conditions of this
Agreement;

(d) is sold and its successor is (i) a Direct Competitor of Cabletron and (ii)
does not provide Cabletron with acknowledgement that it continues to be bound
by, and shall duly and punctually perform, all of the provisions of this
Agreement. "Direct Competitor" shall mean an individual, partnership, limited
partnership, corporation, company, trust, unincorporated organization,
governmental unit or agency or any political subdivision thereof or any other
entity whatsoever (other than Cabletron) that engages in the sale of principally
the same or similar hardware products required for the local area network and
wide area network applications, parts, related software, documentation and/or
related products manufactured, produced and/or distributed by Cabletron or its
affiliates;

(e) ceases doing business as a going concern; has a receiver, administrator or
manager of its property, assets or undertakings appointed; takes advantage of
the insolvency laws of any jurisdiction; makes an assignment in bankruptcy or is
adjudicated a bankrupt; makes a general assignment for the benefits of its
creditors; is ordered by any court of competent jurisdiction to be wound up; or
become insolvent or makes a sale in bulk of a substantial portion of its assets;
provided that this clause (e) shall apply in any case only if the action
referred to occurs in such circumstances as would substantially affect
Cabletron's continuing supply or use of the Product in accordance with this
Agreement;

Provided that Supplier has not terminated this Agreement due to default or cause
of Cabletron and an event described above (at (a) through (e)) has occurred,
then:

Cabletron may place purchase orders for Products directly with Supplier's
manufacturer. Supplier shall direct such manufacturer to accept such purchase
orders and provide the Products to Cabletron, or Supplier will, upon request
from Cabletron, grant the rights to manufacture Product(s) to Cabletron.
Cabletron shall have the right to sublicense this grant to a third party
manufacturer. Supplier shall provide such other manufacturer with all necessary
rights, information and materials (but not tooling or machinery) in order to
permit them to manufacture the Product(s) within their own manufacturing
facilities. Such information includes, by example and not by way of limitation:
(i) manufacturing drawings and specifications of raw materials and components
comprising such parts; (ii) manufacturing drawings and specifications covering
special tooling and the operation thereof; (iii) a detailed list of all
commercially available parts and components purchased by Seller on the open
market disclosing the part number, name and location of the supplier, and price
lists for the purchase thereof; and (iv) one (I) complete copy of the then
current source or binary code used in the preparation of any Software licensed
or otherwise acquired by Cabletron from Supplier hereunder. Such manufacturer
will enter into appropriate confidentiality agreements with its employees,
contractors/suppliers and Cabletron. Supplier shall assist Cabletron in
obtaining any required assignment of rights to Third Party Technology in the
Product(s).

No transfer fee or other amounts would be payable for Product(s) so manufactured
and distributed. Instead, Cabletron will be responsible for payment of any
royalties required for the use of third party technology and pay Supplier a
royalty often percent (10%) of the Transfer Price for such Product under this
Agreement in the event either condition (a), (b), (c) or (e) occur. In the event
condition (d) occurs, Cabletron shall pay Supplier a royalty of five percent
(5%) of the Transfer Price. "Transfer Price" shall mean the current price paid
for Products by Cabletron prior to invoking this section 4.4 and more fully
described in Exhibit A."


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 2
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903
<PAGE>

      Section 4.5 of the Agreement entitled "Software and Firmware" is deleted
and amended by substituting the following new paragraph: "All Software shall be
provided to Cabletron and its customers subject to a use license. Within the
Warranty period, or as part of a maintenance agreement. Supplier shall provide
Software Updates, and Software Upgrades at no additional charge. Supplier shall
provide Cabletron a Not-For-Resale copy of each new Software release.

      Section 4.8 of the Agreement entitled "Documentation and Materials" is
hereby amended by adding the following to the end of the last line of the said
Section: "provided Supplier reviews and approves any changes as they relate to
the representations of Supplier products and services"

      Section 4.9 of the agreement entitled "Marketing Materials" is hereby
amended by adding the following between the words "Cabletron" and "upon" where
they appear in the paragraph of said Section: "Product Management".

      Section 4.10 of the Agreement entitled "Export Licensing" is hereby
deleted in its entirety and amended by substituting the following new
paragraphs:

            "4.10.1 In the event that Cabletron proposes to sell any Products
            outside of the United States, Cabletron shall be responsible for
            obtaining any required export licenses, if any, from the U.S.
            Department of Commerce. Supplier will provide all reasonable
            assistance to Cabletron in Cabletron's efforts to obtain any such
            required export licenses, provided that Supplier shall not be
            required to incur any substantial out-of-pocket expense in
            connection with such assistance.

            4.10.2 Supplier shall have the sole right to apply for and seek to
            obtain any approvals from foreign telecommunications or other
            foreign regulatory agencies that may be required for the legal sale
            and use of Products in specific foreign jurisdictions. Attached
            hereto as Exhibit A is a listing of such foreign telecommunications
            and regulatory approvals now held by Supplier with respect to the
            products identified on said list. In the event that Cabletron
            desires to pursue or make a sale of a Product in a foreign
            jurisdictions which is not covered by a currently available
            approval, Supplier agrees to discuss with Cabletron and consider the
            advisability of applying for and seeking such approval in order that
            Cabletron may pursue such sale. It is understood and agreed that
            obtaining foreign approvals can be an expensive process which must
            be approached with an eye toward the relative costs and benefits.
            Accordingly, the final decision as to whether to pursue a particular
            foreign approval shall be in Supplier's sole discretion."

      Section 4.15 of the Agreement entitled "Price Terms" is hereby deleted in
its entirety and amended by substituting the following new sentence: "Price
terms for all Products shall be F.O.B. Supplier's shipping point."

      Section 4.16 of the Agreement entitled "Quality Assurance and First
Article and Facility Inspection" is hereby amended by deleting the phrase
"thirty (30)" where it appears in the last sentence of the paragraph of said
Section and by substituting therefor the phrase "forty-five (45)".


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 3
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903
<PAGE>

adding a new Section 5.8 as follows:

      Section 5.8 of the Agreement entitled "Ordering & Shipment is hereby
amended by adding a new Section 5.8 as follows:

***

***


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 4
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903


***This information has been omitted pursuant to a request for confidential
   treatment, and has been filed separately with the Securities and Exchange
   Commission.


<PAGE>

automatically upon consummation of the Acquisition with actual payments of the
exercise price and (b) the proceeds to Cabletron with respect to the Acquisition
on account of the shares of common stock of Supplier acquired upon such exercise
of the Accelerated Warrants in excess of the exercise price of the Accelerated
Warrants ("Net Proceeds") shall be held in escrow pending the purchase and
payment of the Product covered by the Accelerated Order. If and as Product
covered by the Accelerated Order is actually purchased and paid by Cabletron, a
proportionate amount of the Net Proceeds shall be delivered to Cabletron out of
escrow."

      Section 6.2 of the Agreement entitled "Distribution of Software Product"
is hereby amended by deleting therefrom the phrase "terms and conditions which
accompanies the Product and by substituting therefor the phrase "in the form
supplied by Supplier and attached hereto ad Exhibit C"

      Section 7.1 of the Agreement entitled "Payment Terms" is hereby amended by
deleting therefrom the phrase "sixty (60)" and by substituting therefor the
phrase "forty-five (45)".

      Section 8.2 of the Agreement entitled "Repair or Replacement", is hereby
amended by deleting therefrom the phrase "sufficient" where it appears in the
second sentence and by substituting therefor the phrase "equal to fifteen
percent (15%) of the average monthly product purchases".

      Section 8.3 of the Agreement entitled "Return, Repair or Replacement
Procedure", paragraph 8.3.1 a hereby deleted in its entirety and amended by
substituting the following new paragraph:

"Supplier will pay all transportation charges for Product returned to Supplier
under these Product Warranty Terms from the End User; provided that Supplier
shall be responsible only for the costs of a single shipment from the End User
to Supplier's designated repair facility by the least expensive appropriate
means of transportation in accordance with Supplier's warranty service policies.
In any case where Supplier determines after testing that the returned item was
not defective, Supplier reserves the right to charge the End User all costs of
shipment both ways."

      Section 8.4 of the Agreement entitled "Epidemic Failures" is hereby
amended by deleting therefrom the phrase "three (3) years" where it appears
in the third sentence and by substituting therefor the phrase "six (6) months".

      Section 8.5 of the Agreement entitled "Warranty Disclaimer" is hereby
amended by deleting therefrom the phrase "AND FITNESS FOR A PARTICULAR PURPOSE"
and by substituting therefor the phrase ",FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT".

      Section 9.1 of the Agreement entitled "End User Support" is hereby amended
by deleting the phrase "without additional charge" at the end of the first
sentence and replacing is with "and the Support Plan set forth in Exhibit D."

      Section 9.1 of the Agreement entitled "End User Support" is hereby amended
by deleting therefrom the final three sentences of said Section and replacing
them with "Subsequent to the


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 5
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903
<PAGE>

initial twelve (12) month period following shipment, Supplier shall provide End
User Support and Software Updates/Upgrades for the fee and on the terms
specified in the Support Plan attached as Exhibit D."

      Section 12.3 of the Agreement entitled "Ownership and Non-Disclosure" is
hereby amended by adding the following at the end of the last sentence of said
Section: "and shall not knowingly disclose such Confidential Information to any
End User or service provider or their affiliates who are manufacturers of dsl
equipment."

      Section 12.4 of the Agreement entitled "Exception" is hereby amended by
deleting the paragraph in its entirety and substituting the following new
paragraph: "The foregoing shall not prevent either party from disclosing
confidential information which belongs to such party or is (1) already known by
the Recipient without an obligation of confidentiality, (2) publicly known or
becomes publicly known through no unauthorized act of the Recipient, (3)
rightfully received without restriction of confidentiality from a third party,
(4) independently developed by the Recipient without use of the other party's
confidential Information, (5) approved by the other party for disclosure, or (6)
required to be disclosed pursuant to a requirement of a governmental agency or
law so long as the disclosing party provides the other party with notice of such
requirement prior to any such disclosure."

      Section 12 of the Agreement entitled "Confidential and Proprietary
Information" in hereby amended by adding Section 12.7 immediately following
Section 12.6 of said Section: "All information disclosed hereunder shall remain
confidential for a period of five (5) years from the date of termination of the
Agreement".

      Section 13.1 of the Agreement entitled "Indemnification by Supplier" a
hereby amended by adding the following between the words "any" and "patent"
where they appear in the first sentence of said Section "North American.
European or Japanese".

      Section 13.1 of the Agreement entitled "Indemnification by Supplier" is
hereby amended by adding the following phrase to the end of said Section
"Cabletron, may submit a written request to Supplier to expand the
indemnification provided herein to additional countries or geographical regions
and such indemnification shall not be unreasonably withheld".

      Section 13.1 of the Agreement entitled "Indemnification by Supplier" is
hereby amended by adding the following phrase to the beginning of the third
sentence: "In the event any Claim Defendant's use of the Product is enjoined,
either temporarily or permanently".

      Section 13.1 of the Agreement entitled "Indemnification by Supplier" is
hereby amended by deleting the last sentence and by substituting the following
phrase: "Supplier shall refund to Cabletron the price paid for the Product less
depreciation based on a five (5) year useful life and Cabletron shall return the
Product to Supplier."

      Section 13.2 of the Agreement entitled "Products Liability" is hereby
amended by adding a new sentence before the last sentence of said Section: "Not
withstanding the foregoing, Supplier shall sot be responsible for claims which
have arisen due to Cabletron's or its agent's [ILLEGIBLE COPY]
<PAGE>

      Section 14.1 of the Agreement entitled "Limitation of Liability" is hereby
amended by deleting therefrom the phrase "CABLETRON" and by substituting
therefor the phrase "EXCEPT FOR SUPPLIER'S INDEMNIFICATION OBLIGATIONS SET FORTH
IN ARTICLE 13, EITHER PARTY'S".

      Section 16.7 of the Agreement entitled "Laws" is hereby amended by
deleting therefrom the phrase "State of New Hampshire" and by substituting
therefor the phrase "Commonwealth of Massachusetts".

      Section 16.7 of the Agreement entitled "Laws" is hereby amended by
deleting therefrom the phrase "Cabletron" where it appears in the last line and
substituting therefor the phrase "either party".

Exhibit B

      Section 2.4, Exhibit B of the Agreement entitled "Inspection and Testing
Standards" is hereby amended by adding the following phrase to the end of the
last paragraph of said Section: "In the event Cabletron desires to contract with
a third party to conduct an inspection, Cabletron shall submit for Supplier's
approval the name of such third party. Supplier shall notify Cabletron of
Supplier's approval or rejection within five (5) business days of receipt of
such request. Supplier's approval shall not be unreasonably withheld but in the
event of rejection Supplier shall provide in writing its reasons for such
rejection.

      Section 2.10, Exhibit B of the Agreement entitled "Engineering Change
Order (ECO) Control" is hereby amended by deleting the entire section and by
substituting therefor the following new paragraph: "Supplier shall provide
Cabletron with written notice of Product modifications in accordance with
Article 4.7 of the Agreement".

IN WITNESS WHEREOF, the parties have caused this Rider to be executed by their
duly authorized representatives.

CABLETRON SYSTEMS
SALES & SERVICE, INC.                                INTERSPEED, INC.


By: /s/ Daniel J Harding                      By: /s/ Stephen A. Ide
    -----------------------------                 --------------------------
    Daniel Harding                            Name: STEPHEN A. IDE
    VP of Bus Dev                                   ------------------------
                                              Title: PRESIDENT
Date: 2/2/00                                         -----------------------
     ----------------------------             Date: 2/2/00
                                                   -------------------------


--------------------------------------------------------------------------------
Cabletron Proprietary Information                                         Page 7
Rider to Cabletron Product Reseller Agreement
Contract No. 99-OEMB-1206-1903