Document:

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                                                            EXHIBIT 4.(a)(xxiii)

                                    AGREEMENT

                                     BETWEEN

                                SCI IRELAND LTD.

                                       AND

                             MADGE NETWORKS LIMITED

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CONTENTS

1.    Terms of the Agreement

2.    Prices

3.    Purchasing Procedure, Delivery & Terms of Payment

4.    Technical Requirements & Quality standards

5.    Inspection and Acceptance

6.    Warranty

7.    Proprietary rights and Confidentiality

8.    Termination

9.    Force Majeure

10.   Arbitration

11.   Inventory Indemnification

12.   Miscellaneous Provisions

13.   Agreement Party Rights

14.   Product Indemnification

ATTACHMENTS

A.    Price List

B.    Authorisation To Procure

C.    Schedule of Reports/Meetings and Service Level Agreements (SLA)

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                                    AGREEMENT

This Agreement ("Agreement") dated November 30, 2001 is entered into by Madge
Networks Ltd, of Wexham Springs, Framewood Road, Wexham, Slough, SL3 6PJ England
(hereinafter referred to as Madge)

And

SCI IRELAND Ltd., A company registered in Ireland having a place of business,
Rathealy Road, Fermoy, Co cork, Ireland (hereinafter referred to as SCI).

Whereas Madge wishes to have products manufactured by SCI and SCI wishes to
manufacture such products (hereinafter referred to as Products) for Madge, and
sell to Madge at the prices and subject to terms and conditions of the
Agreement.

Now, therefore, in consideration of the premises and the mutual covenants herein
contained, the parties hereto agree as follows.

1.0   TERM OF THE AGREEMENT

      The term of this Agreement shall be one (1) year from the Effective Date
      and, unless terminated as provided in Section 8 below, will automatically
      renew for one (1) year periods.

1.1   Definition of term `Days': Unless expressly stated as "working" days, the
      use of `days' within this Agreement shall be interpreted to mean calendar
      days.

2.0   PRICES

2.1   The unit prices are listed in the Price List set forth in Attachment A and
      are (INCOTERMS 2000) DDP (Delivered Duty Paid) Madge nominated location in
      England. SCI and Madge quarterly will review purchase prices, and any
      increases or decreases in materials costs within the price shall be agreed
      between the Parties as appropriate. Prices shall be as detailed in
      Attachment "A" and reviewed on a quarterly basis. Product prices must be
      agreed at least two weeks prior to the start of each quarter. All
      increases in costs other than direct materials costs shall be subject to
      six (6) month notice by SCI, save for increases driven by customer ECO
      (Engineering Change Order) which may be applicable within six (6) months
      subject to mutual agreement between Madge and SCI. SCI will not make any
      ECO changes without prior written authorization. All decreases in costs,
      whether direct material costs or not, are to be encompassed within the
      quarterly purchase prices to be mutually agreed between SCI and Madge.

      "SCI will assist Madge in its cost reduction plans by providing
      recommended process changes and reviewing specific and unique
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      components which drive seventy-five (75%) percent of the Product price
      during the quarterly review.

2.2   SCI warrants that at the effective date hereof prices set out in
      Attachment "A" are no higher than those charged to any other customer of
      SCI purchasing comparable quantities of Products or similar items under
      comparable conditions affecting price.

3.0   PURCHASING PROCEDURE, DELIVERY & TERMS OF PAYMENT

3.1   Issuance and Acceptance of Orders

      Purchase orders issued by Madge to SCI shall be governed by this
      Agreement, and will state the Products, quantities, delivery dates,
      prices, destination, consignee at destination, and purchase order number.
      The Purchase Order must also include revision of production documentation.

      Purchase orders may be in the form of facsimile or email.

      Order acknowledgement by SCI shall be made by email or facsimile within
      five (5) working days from receipt of purchase order (or email or
      facsimile purchase order, as the case may be) from Madge.

3.1.1 Purchase orders shall be placed in accordance with and subject to the
      following Minimum Order Quantities (MOQ):
<TABLE>
<CAPTION>
       Product                    Description                 MOQ
       -------               -------------------             -----
<S>                         <C>                               <C>
       058-300                   Deskstream                   400
         58-39                 Ethernet Module                 77
         58-35               HSTR Copper Module                42
         58-34                TR Fiber Module                  40
         58-36               HSTR Fiber Module                 96
         58-37                Stacking Module                 167
</TABLE>

      The MOQ volumes are to be reviewed quarterly by SCI and Madge.

3.1.2 SCI shall always accept PO's from the customer, the only exception being
      where the customer does not meet the MOQ, or pricing is not agreed to as
      stated. In such event, SCI must notify Madge in writing within five (5)
      working days of the PO being issued by Madge.

3.2.1 Delivery

      All ordered Products shall be delivered in accordance with the agreed upon
      lead-time. SCI shall inform Madge of availability of Products for delivery
      at least five (5) working days in advance of the actual delivery date as
      per the original schedule.
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      Except as otherwise mutually agreed, the lead time for Products sold
      hereunder shall be ninety (90) days from issuance of Purchase Order
      ("standard lead time").

      Long lead items shall be purchased to forecast or mini-bills of material,
      as required and agreed to by Madge and SCI. When cancellations of such
      purchases occur as a result of Madge changing the order schedule or the
      forecast, the financial responsibility will be Madge's, subject to the
      "liability amounts" as defined monthly in Attachment B. SCI will use
      commercially reasonable efforts to dispose of inventory on behalf of
      Madge.

      In the event Madge requests a lead time shorter than the standard lead
      time, SCI shall use its commercially reasonable effort to accept the
      shorter lead time and shall explicitly communicate to Madge the
      acceptance, non-acceptance, or additional costs (if any) to provide
      materials required of the stated shorter lead time indicated on the
      Purchase Order. Additional cost will be reviewed, and mutually agreed on a
      case-by-case basis. If there is any change to the above mentioned shorter
      lead-time delivery date acknowledged by SCI, SCI will notify Madge by
      email or facsimile of such occurrence within five (5) working days of such
      occurrence.

3.2.2 In the event of a late delivery, SCI will pay for the premium freight cost
      to expedite the Product delivery, unless the late delivery is due to
      issues mutually agreed between Madge and SCI as being outside of SCI's
      direct control. In any event, SCI shall use reasonable commercial efforts
      to meet the delivery date requested in Madge's Purchase Order.

3.2.3 Deliveries must be accompanied by appropriate paper work which must
      include and clearly state: The PO Number, The Part Number, The Quantity
      being delivered and the Country of Origin.

3.3   Procedure for Authorisation

      Madge will issue authorisations to SCI for activities in connection with
      delivery of the ordered units.

      These authorisations are divided into steps as follows:

3.3.1 Authorisation to Procure

      This contains the authorisation to purchase all components. SCI may
      procure all necessary components required to meet Purchase Orders placed
      by Madge, in a manner which takes into account the lead-times for the
      materials in a responsible purchasing manner.

      Authorisation to purchase specific components as required to build a
      specified number of forecasted requirements, over and above those on
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      order, shall be ordered upon written notification to order such materials
      by Madge, such requests to purchase shall be communicated to Madge as per
      Attachment B.

3.3.2 Authorisation to manufacture 4 weeks prior to confirmed delivery date

      Unless Madge advises by Facsimile or E-Mail no later than four (4) weeks
      before confirmed delivery date, SCI will be deemed to have been authorised
      to produce the number of units as ordered. Other than 3.3.3 below, this is
      the total limit of SCI authorisation to produce.

3.3.3 Authorisation to Customise

      The last authorisation specifies the final customisation, and will be
      given no later than two (2) weeks before confirmed delivery date. However,
      unless Madge advises by Facsimile or E-Mail no later than two (2) weeks
      before confirmed delivery date, SCI will be deemed to have been authorised
      to produce the number of units as ordered. This is the total limit of SCI
      authorisation to produce. Such final customisation will include Retail
      Pack, Bulk Pack, and OEM Specific requirements.

3.4   Rescheduling/Cancellation of Purchase Orders

3.4.1 Madge may issue Purchase Order revisions and reschedules by notifying SCI
      in accordance with the following schedule:

      Notice of Reschedule                        Reschedule Window
      (Days Prior to Line                         (Days Out Reschedule
      Item Delivery Date)                         a Delivery Date)
      -------------------                         ----------------

      0 to 14  (two weeks)                        No Reschedule

      15 to 30                                    25% of Product volume
                                                  60 days (two months)

      31 plus days                                180 days (six months)

      Reschedules beyond 60 days are subject to 1% per month inventory carrying
      charge on the Purchase Order quantity and unit price being rescheduled.

3.4.2 Madge may not cancel production of Products within fourteen (14) days of
      their scheduled ship dates. Customer may reschedule production of Products
      within thirty (30) days of the ship date as mutually agreed in Section
      3.4.1 above. Madge may cancel Purchase Orders by notifying SCI no later
      than thirty (30) days prior to the scheduled delivery date(s), but will be
      responsible for the Termination Inventory and handling charges in Section
      11.
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3.4.3 When Madge request for cancellation affects outstanding purchase orders,
      SCI shall inform Madge of impact of cost within two weeks from request for
      cancellation. The terms of Section 11 and Attachment "B" shall apply in
      calculating any cancellation costs. Madge's approval of the total costs
      will be required, as quickly as is reasonably possible, after notification
      from SCI for formal cancellation purposes. Cost associated with the
      subsequent cancellation of orders issued to sub-suppliers shall be limited
      to the liabilities detailed in Attachment "B" or any future mutually
      agreed revisions of Attachment "B" and shall be paid by Madge, following
      negotiation (as outlined in Section 11.3) with Madge, and only if the
      material cannot be used elsewhere by SCI, subject to Madge's agreement.

      The total liability of Madge for cancellation of purchase orders shall in
      no event exceed the liabilities detailed in this Section, Section 11, and
      current version of Attachment "B."

3.5   Delivery Delays

      In the event that SCI fails to deliver any Products within fifteen (15)
      calendar days of the agreed upon PO delivery period, except for the terms
      stated in Section 3.2.1, then Madge shall have the right to cancel the
      order or portion of the order. The Customer is responsible for Purchase
      Order Cancellations or partial Purchase Order cancellations as set forth
      in Section 11.1.

      When Madge issues Engineering Change Orders (ECO's) affecting outstanding
      purchase orders, SCI shall inform Madge of impact on delivery schedule and
      price within fifteen (15) days of receiving such request. SCI will not
      implement any changes without prior written approval of charges by Madge.
      SCI shall not be required to implement such change until the Parties have
      mutually agreed upon the price.

      Upon mutual agreement, the revised delivery schedule for outstanding
      Purchase Orders shall be adjusted.

3.6   Terms of Payment

      Payment terms are net thirty (30) days from the date of invoice in United
      States dollars. The invoice date shall be no earlier than the ship date.
      Payments are not subject to offset or setoff. In the absence of a bona
      fide dispute, SCI may impose a late payment fee or interest charge on all
      amounts past due by more than five (5) working days up to the maximum
      charge or rate allowed by law. SCI's acceptance of a partial payment on
      the undisputed portion of the Invoice is not a waiver of SCI's right to be
      paid the remainder due.

3.7   Inclusions in Price

      Prices are DDP INCOTERMS 2000.
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      Purchase prices set forth in Attachment A, hereto, shall include the full
      cost of ordered Products suitably packed.

4.0   TECHNICAL REQUIREMENTS & QUALITY STANDARDS

4.1   QA Standards, Procedures and Instructions

      SCI shall implement quality procedures and instructions as defined below
      and shall conform to either ISO 9002:1994 or ISO 9001:2000. In addition,
      SCI's facility shall be UL approved.

4.1.1 Incoming Inspection

      Madge does not define incoming inspection methods or criteria, but expects
      SCI to ensure that all incoming components conform to Madge specifications
      defined and described in the Bills of Materials (BOM), and that they are
      of good condition and fit for assembly. Madge reserves the right to audit
      the procedures and methods used to achieve this at any time.

4.1.2 Handling Storage and Delivery

      Madge does not define handling storage or delivery methods or criteria but
      expects SCI to ensure that component parts are handled, stored, and
      delivered according to manufacturer and/or Madge's specification for that
      part. Madge reserves the right to audit the procedures and methods used to
      achieve this at any time.

4.1.3 Workmanship

      For Electronic Assembly SCI shall implement

      a)    ANSI/IPC 610 Rev C class 2 - Acceptability of Electronic Assembly

      b)    Any exceptions to ANSI/IPC 610 Rev C - as defined by Madge

4.1.4 Manufacturing Control

      Manufacturing control methods should be defined by internal SCI
      documentation and these procedures should conform to ISO 9002:1994 or ISO
      9001:2000 requirements. Madge reserves the right to audit the procedures
      and methods used to achieve this at any time.

4.2   In Circuit Test (ICT)

      SCI shall be responsible for implementation and quality of ICT programmes
      and fixtures.
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      Madge shall specify ICT requirements and make available to SCI source
      programmes to support implementation of ICT programmes. SCI will develop
      ICT programs from schematics and will write a list of untested components.
      The untested components will be verified in the Functional Test or by
      visual inspection.

4.3   Functional Testing (Product Acceptance Test)

      Madge will make available to SCI test software and documentation to be
      used in functional testing. SCI will locally purchase the necessary PCs to
      be used in the functional test as specified by Madge in the event that SCI
      does not already have such PC's and subject to prior agreement with Madge.
      Any PC's paid for by Madge shall reside with SCI on a "loan" basis & will
      remain the property of Madge.

      All manufactured Products must pass the mutually agreed upon functional
      test set by Madge to verify the functional performance of the Products.

      Madge will also provide functionally operating boards to be used as `gold'
      standards for verification and correlation of the functional test process.
      Such boards will be on a "loan" basis to SCI and will remain the property
      of Madge.

      Madge will provide SCI with failure analysis support as per Madge's
      request and documentation for each parameter in the functional test
      software, which can have caused the rejection/failure.

      Equipment, jigs or PC's, paid for by Madge, and any equipment or boards
      provided to SCI by Madge remain the property of Madge. SCI shall maintain
      all such property in good order and ensure such product is adequately
      insured and shall promptly return such equipment on termination of this
      agreement.

4.4   Packaging

      Packaging for Product shipments in standard containers, and packaging of
      individual Products are specified in the relevant Bill of Material as
      supplied by Madge.

      Madge has the option to change from bulk to retail packaging prior to
      shipment. SCI is under no obligation to change packaging procedure until a
      mutual agreement is reached concerning any product price movements
      associated with packaging revision.

4.5   Quality Standards

      If SCI fails to comply with QA requirements (defined in Sections 4.1 -
      4.4) and functional performance (Product Acceptance Test), Madge has the

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      right to terminate the agreement under the terms of Section 8.1 (b) and
      Section 11 of this Agreement.

4.5.1 Quality Levels

      Delivered Quality is deemed to be equal to Manufacturing Delivered Quality
      and the target is 99% for products with an integral Power Supply, and
      99.5% for modules and plug-in option cards. Madge and SCI will review the
      Delivered Quality each month as set forth in Attachment "C".

4.5.2 "Delivered Quality" lower than target

      If Delivered Quality falls below 98% SCI will promptly issue to the
      Customer a corrective action plan to get back to or above 99%.

5.0   INSPECTION AND ACCEPTANCE

5.1   Acceptance Tests

      Until the parties will otherwise agree upon in writing, SCI shall perform
      ICT and customer functional testing on 100% of the manufactured units of
      Products before their delivery to Madge. SCI warrants to Madge that the
      quality levels of the Products shall fully conform to the specifications
      set out by Madge. Madge shall have the right to conduct, on ordered
      Products, the Acceptance Tests in accordance with sampling procedures,
      testing specifications, and quality levels described in Section 4.
      According to the results thereof, it shall have the right to accept or
      reject either the lots or, at Madge's option, the single defective units
      thereof.

      At any time Madge may perform inspections in two steps.

      Upon Madge notification, and a mutually agreed upon inspection time and
      date by both Parties, Product inspections may be performed at the premises
      of SCI before delivery, and/or at a destination within ten (10) working
      days after arrival of Products. SCI is not responsible for delays caused
      by Madge's right to inspect Product prior to delivery.

      If inspection tests are performed at the destination they will be
      identical with the tests, which are performed at SCI's facility according
      to the mutual agreed upon Product Acceptance Tests. Correlation between
      the two test processes will be established and maintained throughout. SCI
      has the option to verify any assembly, which is rejected at the final
      destination, to ensure there are no correlation issues, prior to
      finalisation of test report and disposition.

      The mutually agreed upon inspection performed at SCI's premises will
      result in a preliminary acceptance test report. An approved Acceptance
      Test report allows SCI to ship Products.

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      The inspection performed at destination within fifteen (15) days of
      receipt by Madge will result in a Final Acceptance Test report. Lots or
      units of Products, as the case may be, duly rejected by Madge, at SCI's
      option, shall be replaced or repaired by SCI at its expense no more than
      fifteen (15) working days from the date of SCI's receipt of the Products.

5.2   Transportation Costs of Rejected Products

      Any unit of Products rejected pursuant to the provisions of Section 5.1
      above shall be reshipped by Madge, at SCI's expense, to SCI's premises,
      subject to SCI's Return Material Authorisation procedure (RMA), and a
      credit note should also be issued to Madge. The replaced or repaired units
      of Products shall be re-invoiced and shipped by SCI to the original
      destination and the cost of any transportation shall be borne by SCI.

      SCI shall not be responsible for transportation costs if no defects are
      found (NDF) and will charge Madge a mutually agreed upon NDF charge.

5.3   Attendance at SCI's Plant

      Madge reserves the right in accordance with SCI's safety and security
      requirements, to place at any time, on reasonable notice, one or more
      engineer(s) in the manufacturing plant of the Products to carry out
      acceptance tests referred to in Section 5.1. Madge shall be responsible
      for the actions and/or inaction of its employees while its employees are
      in the manufacturing plant of the Products.

      The salaries of said engineer(s) as well as their travel and living
      expenses are borne by Madge. SCI agrees to furnish said engineer(s) with
      reasonable working facilities as necessary for their job. SCI will make
      suitable arrangements so that said engineer(s) have access to the areas
      where Madge Products are manufactured and tested. Such engineer(s) shall
      be empowered to reject the Products to be delivered to Madge in the event
      that such Products fail the acceptance requirements.

6.0   WARRANTY.

6.1   SCI represents and warrants to Madge that each Product shall be free from
      defects in workmanship and materials for a period of fifteen (15) months
      from ship date (the Product Warranty). The material portion of the Product
      Warranty shall not apply (i) to any materials consigned or supplied to SCI
      by Madge, (ii) to any Product that has been abused, damaged, altered or
      misused, or (iii) to any Product damaged as a result of causes external to
      the Product. The Products shall be considered free from defects in
      workmanship, if they are manufactured in accordance with mutually agreed
      upon manufacturing workmanship standards, conform to the Product

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      Specifications, and successfully complete mutually agreed Product
      Acceptance Tests.

6.1.1 ALL CLAIMS FOR BREACH OF WARRANTY MUST BE RECEIVED BY SCI NO LATER THAN
      THIRTY (30) DAYS AFTER THE EXPIRATION OF THE WARRANTY PERIOD. THE PRODUCT
      WARRANTY IS THE ONLY WARRANTY GIVEN BY SCI. SCI MAKES, AND MADGE RECEIVES,
      NO OTHER WARRANTY EITHER EXPRESSED OR IMPLIED. ALL WARRANTIES OF
      MERCHANTABILITY OF FITNESS FOR A PARTICULAR PURPOSE OR USE, AND ALL
      IMPLIED WARRANTIES OF TITLE OF ANY CONSIGNED MATERIALS, ARE EXPRESSLY
      DISCLAIMED AND EXCLUDED.

6.1.2 Unless expressly agreed to by SCI in writing, SCI makes no warranty that
      the products will (1) meet any specifications not set forth herein, or (2)
      receive the approval of or be certified by underwriters laboratory, any
      federal, state, local or foreign government agency (including without
      limitation the Federal Communications Commission) or any other person or
      entity. SCI will assist Madge in obtaining such approvals or certificates
      or meeting such specifications.

6.1.3 Madge's exclusive remedy for any breach of the Product Warranty shall be
      at SCI's option, to repair at SCI facility, replacement of defect Product,
      or refund of Product purchase price. All Warranty repairs performed by SCI
      will be: (1) in accordance with the current Product Specifications and
      Acceptance Tests, (2) placed in new packaging, and (3) shipped to Madge or
      Madge Customer, as applicable. In the event that a Product is "no defect
      found" (NDF), after return to SCI, Madge shall pay the return shipping and
      mutually agreed NDF charges.

6.1.4 SCI will inspect all defective Warranty returns upon receipt. SCI will
      endeavour to action the chosen warranty option (repair, replacement, or
      refund) within fifteen (15) days of receipt. SCI's root cause defective
      Product investigation of why the Product failed will include investigation
      of the Madge reported symptoms. Such repaired Warranty Products shall be
      warranted for the remainder of its original Warranty or ninety (90) days,
      whichever is longer. Product Warranty repairs by a party other than SCI
      shall render the Product Warranty as null and void.

6.1.5 Madge warrants to SCI that Madge documentation and other data provided for
      manufacture of the Product is accurate and complete, unless Madge informs
      SCI otherwise.

6.1.6 Upon Madge request and mutual agreement on terms and conditions, SCI
      will provide Non-Warranty Product (outside the Product Warranty period)
      repairs.

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6.2   Survival of Warranty

      Section 6 shall survive termination of this Agreement as stated or upon
      SCI's fulfilment of Madge's request to return Madge-owned test equipment
      and fixtures.

7.0   PROPRIETARY RIGHTS AND CONFIDENTIALITY

7.1   All existing intellectual property owned by or licensed to Madge will
      remain owned by and licensed to Madge. Madge shall grant licenses to SCI
      to use Madge intellectual property to the extent that such licenses will
      assist SCI in SCI obligations pursuant to this Agreement. Madge shall own
      any inventions, discoveries, and manufacturing technology related to Madge
      Product(s) developed by SCI and paid for by Madge under this Agreement.

7.2   The proprietary rights to all product and documentation delivered
      hereunder by Madge shall remain solely with Madge.

      SCI and its employees covenants and agrees that he/she will not reveal or
      disclose to any person or persons outside the company any data or
      information that he/she acquires either verbally or in writing from Madge
      or to use this information for the benefit of anyone other than Madge.
      Such information will include, but is not limited to: technological
      techniques, product plans, customers' yields and pricing policies and the
      figures about the product produced or planned.

      Madge shall not disclose SCI processes or pricing or technology to any
      person or persons outside of the Contract relationship. The Bilateral
      Non-Disclosure Agreement between the Parties executed on April 4, 2001
      shall remain enforce and binding for the duration of this Agreement.

      SCI shall not be liable for disclosure of any such information if the
      same:

      (a)   was in public domain at the time it was disclosed

      (b)   is documented that it was known to SCI at the time it was disclosed

      (c)   is disclosed with prior written permission of Madge

      (d)   is documented that it became known to SCI from a source other than
            Madge without breach of this Agreement.

      (e)   is independently developed.

8.    TERMINATION

8.1   Either Party may terminate this Agreement by written notice to the other
      party in the event that such other party:

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      (a) file a petition of bankruptcy, or is adjudicated bankrupt, or makes a
      general assignment for the benefit of the creditors, or becomes insolvent
      or otherwise unable to meet its financial and business obligations in a
      reasonable manner after they become due, or (b) fail to perform any of its
      material obligations under this Agreement, and such failure is not
      remedied within thirty (30) days after a notification of default by the
      non-defaulting party, if the default can be remedied in this timescale. If
      SCI is the defaulting Party, SCI must within this thirty (30) day period,
      provide a detailed plan setting out when the breach will be remedied which
      will be at least within 60 days of the notice being served.

8.1.1 Either Party may terminate this Agreement for any cause with one hundred
      and eighty (180) days written notice of termination to the other party.

8.2   Under expiration or termination of this Agreement for any cause, the
      rights and obligations of the parties under this Agreement shall
      terminate, except for such rights and obligations which are expressly
      provided herein to survive the expiration or termination of this Agreement
      which are those rights and obligations in Sections 6, 7, 8, 10, 11, 12,
      13, 14, 15, and any payment obligations accrued prior to such expiration
      or termination.

8.3   Under expiration or termination of this Agreement for any cause, SCI shall
      promptly return to Madge any equipment, jigs, or PC's paid for by Madge,
      and any equipment or boards provided to SCI by Madge.

8.4   Under expiration or termination of this Agreement for any cause, SCI shall
      provide all commercially reasonable and practical assistance to Madge to
      transition production to another manufacturer.

8.5   The provisions for termination of this Agreement and their exercise shall
      not constitute a waiver by either party, or a substitute for, any relief
      or remedy that is otherwise available.

9.0   FORCE MAJEURE

      Neither party shall be liable for delays in or failures of performance due
      to causes beyond such party's reasonable control, including, but not
      limited to, Acts of God, acts of civil or military authority, priorities
      under governmental authority, legal restrictions, fires, explosions,
      embargoes, mobilisations, riots, epidemics: and to the extent the
      following are on a national basis, strikes, industrial disturbances,
      electricity, oil or transport, or restrictions in the use of power.

      In the event of any such delay or failure the affected party shall send
      written telegraphic notice of the same and the reason thereof to the other
      party within seven (7) calendar days from the time the affected party
      knew, or should have known, of the force majeure in question. The
      performance of the affected party shall be deemed suspended so long as and
      to the extent that any such force majeure continues; provided however,
      that after ninety (90) consecutive or cumulative days of such suspension
      on the part of

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      either party, the other party may terminate the affected installments
      under any Purchase Order.

      PARTY OBLIGATIONS: If SCI is the party claiming the force majeure event,
      SCI will submit within thirty (30) days a plan of action to cure the
      Product delivery or other breach. If Madge is the party claiming the force
      majeure event, SCI will work with Madge on rescheduling Product deliveries
      on current Purchase Orders. In the event the Parties agree to terminate
      this Agreement during a force majeure event, Madge will be responsible for
      fulfilling its obligations at the date of termination as set forth in this
      Agreement, including but not limited to, outstanding invoice payments, and
      termination obligations as stated in Section 11.

10.   ARBITRATION

      Any and all disputes that may arise under or in connection with the
      interpretation, performance or non-performance, or termination of this
      Agreement, shall be settled promptly by negotiation between the parties.
      If the parties cannot resolve the dispute within thirty (30) days of the
      matter in dispute being raised by the relevant party, the dispute shall be
      escalated to Madge's VP Operations and SCI Ireland's Senior or Executive
      VP for final resolution.

      If resolution of the dispute is not reached within fifteen (15) days from
      the date of being escalated by the parties to their respective senior
      management referred to above, either party may request that such dispute
      be resolved in accordance with the Rules of the London Court of
      International Arbitration. Such arbitration shall take place in London and
      shall be conducted in the English language by one arbitrator if Madge and
      SCI agree on one individual and if the parties do not so agree by three
      arbitrators; one of which will be selected by each party, and the third
      will be selected by the other two arbitrators.

      The decision of the arbitrators shall be final and without appeal and may
      be enforced in any Court having jurisdiction over the parties or their
      assets.

      The arbitrators shall decide all disputes in accordance with equity and
      good commercial practice. The arbitrator's award may include direct
      damages against either party but under no circumstances will the
      arbitrators be authorised to nor shall they award punitive, consequential
      or multiple damages against either party.

      The provisions of this Section 10 shall survive for five (5) years after
      the termination or expiration of this Agreement.

11.0  INVENTORY INDEMNIFICATION

                                       15

<PAGE>
11.1  Upon cancellation of a Purchase Order, order or any portion thereof, or
      upon expiration of this Agreement or termination of this Agreement for any
      reason, Madge shall be responsible for:

      (i) all finished Products scheduled for shipment within the thirty (30)
      days immediately following SCI's receipt of the cancellation or
      termination notice (the "Notice");

      (ii) all work-in-process at receipt of the Notice shall have manufacture
      completed by SCI and free from defects in line with the quality standards
      set out in this agreement, unless Madge requests otherwise in writing
      (facsimile or e-mail ); and

      (iii) all components (as expressed in current Attachment "B"),
      subassemblies and other material purchased to fill a Purchase Order or
      order or authorised to be purchased by Madge which are on hand or on order
      at receipt of the Notice. Without limitation (other than as expressed in
      Attachment "B") this includes inventory made obsolete or excessive due to
      change to the specifications or Products, minimum buy quantities, and reel
      quantities. Item (i)-(iii) are referred to as the "Termination Inventory".
      In calculating the quantity of finished Products under (i) above, Products
      rescheduled for manufacture and shipment during the forty-five (45) days
      immediately prior to receipt of the Notice may be counted by SCI.

11.2  SCI will make every reasonable effort to use the Termination Inventory on
      other current programs at the Plant where the Products are manufactured,
      will cancel all outstanding material orders with vendors, and will attempt
      to return piece parts to vendors. Madge will be responsible for costs,
      charges and fees actually incurred by SCI to cancel or return any portion
      of the Termination Inventory to vendors and, upon mutual agreement, the
      cost to modify the Products for other programs.

11.3  Within thirty (30) days from termination or cancellation, SCI will
      invoice, and Madge will purchase (subject to mutual agreement following
      audit by Madge) the Termination Inventory remaining after vendor
      cancellations and returns and after other program use, as follows: (i) for
      inventory and authorised long lead time components (save for such long
      lead-time components not yet delivered to SCI that shall be invoiced and
      ship to Madge upon arrival) at SCI's standard cost, plus a reasonable
      handling charge; (ii) for WIP, at a reasonable pro rata, percentage of the
      finished Product purchase price; and (iii) for finished Product, at the
      purchase price in effect at termination or cancellation. Madge will be
      responsible for any negative price differentials between the price SCI
      paid for the Piece Part Inventory and authorised long lead time components
      and the price at which SCI was able to return and/or utilise the items on
      other programs. SCI will credit Madge for any positive price
      differentials.

12.0  MISCELLANEOUS PROVISIONS

                                       16
<PAGE>

12.1  The rights and obligations of either party under this Agreement cannot be
      transferred or assigned to a third party without the prior written consent
      of the other party except that assignment to an affiliate of each of the
      Parties is allowed without consent. No other person or entity shall have
      any rights under or in connection with this Agreement

12.2  This Agreement shall not be considered modified, altered, changed or
      amended in any respect unless in writing and signed by an authorised
      representative of each of the parties hereto.

12.3  Notices under this Agreement shall be considered given when received by
      the other party by telex or facsimile or by personal delivery,
      confirmation copy by airmail, to the address indicated on the first page
      of this Agreement, to the attention of

      SCI: SCI Ireland Ltd. Attention: Plant Manager, cc: Program Manager. Fax
      no:+353 25 31104 , +353 25 31777

      Madge: Madge Networks Limited, Wexham Springs, Framewood Road, Wexham,
      Slough SL3 6PJ, England. Attention: VP Operations. Fax no: +44 1753
      661206; cc: Legal Department fax no: +44 1753 661448.

      Any change of the Authorised Representative by either party shall be
      notified in writing to the other party.

12.4  This Agreement with attachments and such changes and amendments made from
      time to time in writing signed by authorised representatives of the
      parties constitutes the complete governing conditions between the parties
      with respect to the extent of the Agreement, and supersedes any previous
      agreement, memorandum letter of intent (including LOA), representation or
      understanding regarding the subject matter hereof, save for the mutual Non
      Disclosure Agreement dated April 4th 2001 the terms of which are
      incorporated into this Agreement by reference.

12.5  Any failure by the other party to enforce any provision of this Agreement
      shall in no way constitute a waiver or affect its rights to require the
      performance thereof by the other party nor affect the validity of any
      other provisions, except when this Agreement expressly provides otherwise.

12.6  All performances under this Agreement by either party shall be performed
      as an independent business entity, and not as an agent of the other party.
      No persons furnished by either party shall be considered the other party's
      employees or agents, and each party shall be responsible for its
      employees' compliance with all laws, rules and regulations involving
      employment of labour, hours of labour, working conditions, payment of
      wages and payment of taxes, such as unemployment, social security and
      other payroll taxes, including applicable contributions from such persons
      when required by law.

                                       17
<PAGE>

12.7  It is agreed that the laws of England hereunder, shall govern the validity
      and construction of this Agreement and performance.

12.8  SCI shall do everything necessary to comply with INCOTERMS (2000) DDP.
      Madge's VAT number and other required export information shall be provided
      by Madge, upon SCI request. SCI will prepare the necessary export
      documentation to comply with applicable US and local government export
      control statues and regulations.

12.9  Madge hereby certifies that it will not knowingly export, directly or
      indirectly, any US origin technical data or software acquired from SCI or
      any direct product of that technical data or software, to any country for
      which the US Government requires an export license or other approval,
      without obtaining such approval from the US Government.

13.   This agreement is solely for the benefit of the parties and any person who
      is not a party to the term of this agreement has any rights under the
      Contracts (Rights of Third Parties) Act 1999 to enforce any term of this
      Agreement.

14.1  SCI agrees to promptly defend, indemnify and hold Madge, its successors
      and assigns, harmless from and against all claims, losses and expenses of
      every kind (including attorney's fees and costs) relating to any claim
      that a Product has a manufacturing defect. SCI will not have liability to
      the extent that a claim results from the Product design or specifications
      of Madge.

14.2  Madge is responsible for design of the Products. Madge agrees to promptly
      defend, indemnify and hold SCI, its successors and assigns, harmless from
      and against all claims, losses and expenses of every kind (including
      attorney's fees and costs) relating to (a) any claim or threatened claim
      that any Product, or portion thereof, infringes any patent, trademark,
      copyright, mask work or any property right, whether foreign or domestic,
      of any third party; or (b) the distribution, sale or use of any Product or
      part thereof, whether by Madge or third party and whether any such claim
      is based upon contract, tort or any other legal theory provided that in no
      event shall Madge's liability under the terms of this Agreement exceed the
      sum of $3,000,000 (three million dollars).

14.3  In no event shall either party be liable for any special, incidental,
      punitive, exemplary or consequential damages, whether based upon contract,
      tort, or any other legal theory (including without limitation lost profits
      and opportunity.

                                       18

<PAGE>
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed
by their duly empowered representatives as follows:

Madge Networks, Ltd.

by        /s/ Bob Lindsey

date      January 10, 2002

SCI

by        Chris White

date      January 18, 2002

                                       19
<PAGE>
                                 Attachment "A"

                                   Price list

                                 Attachment "B"

                            Authorisation To Procure

                                 Attachment "C"

         Schedule of Reports/Meetings and Service Level Agreements (SLA)

Schedules are available upon request.

                                       20<PAGE>
                                                             EXHIBIT 4.(a)(xxiv)

                             DATED 21 DECEMBER 2001

                       MADGE.WEB LIMITED (in liquidation)

                                       and

                                 THE LIQUIDATORS

                                       and

                                MADGE NETWORKS NV

                                       and

                             MADGE NETWORKS LIMITED

                                       and

                          MADGE GROUP SERVICES LIMITED

                                       and

                      MADGE.WEB INTERNATIONAL (CI) LIMITED

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

                           SUPPLEMENTAL AGREEMENT AND

                                DEED OF INDEMNITY

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

                                  ALLEN & OVERY
                                     LONDON
                                   BK:920855.1

<PAGE>
This SUPPLEMENTAL AGREEMENT AND DEED OF INDEMNITY is made on the 21st day of
December, 2001 BETWEEN:

(1)   MADGE.WEB LIMITED (in liquidation) (registered number 3846790) whose
      registered office is at Hill House, Richmond Hill, Bournemouth, BH2R 6HR
      (the "COMPANY") acting by Neville Barry Kahn and David James Waterhouse,
      licensed insolvency practitioners of PricewaterhouseCoopers, Plumtree
      Court, London EC4A 4HT (the "LIQUIDATORS"); and

(2)   THE LIQUIDATORS in their capacity as liquidators of the Company; and

(3)   MADGE NETWORKS NV ("NV") a company registered in the Netherlands
      registered number 34124140 whose registered office is at Transpolis
      Schiphol Airport, Polaris Avenue 23, 2132 JH Hoofddorp, the Netherlands;
      and

(4)   MADGE NETWORKS LIMITED ("NETWORKS") (registered number 2011579) whose
      registered office is at Wexham Springs, Framewood Road, Wexham, Slough SL3
      6PJ (together with NV, the "FUNDERS"); and

(5)   MADGE GROUP SERVICES LIMITED (registered number 3953966) ("GROUP
      SERVICES") whose registered office is at Wexham Springs, Framewood Road,
      Wexham, Slough SL3 6PJ; and

(6)   MADGE.WEB INTERNATIONAL (CI) LIMITED (registered number FC021680) whose
      registered office is at Coutts House, Le Truchot, St. Peter Port, Guernsey
      GY1 1WD (together with Networks and Group Services, the "GROUP COMPANY
      CREDITORS").

WHEREAS

(A)   The Company went into administration on 27th April, 2001 and Neville Barry
      Kahn and Peter Norman Spratt, both of PricewaterhouseCoopers, were
      appointed joint administrators of the Company (the "ADMINISTRATORS"). The
      administration order was discharged on 17th August, 2001 and the Company
      went into creditors' voluntary liquidation on the same date.

(B)   The Liquidators were appointed joint liquidators of the Company at a
      meeting of the Company's creditors held on 17th August 2001.

(C)   On 27th April, 2001 NV and the Administrators entered into an agreement
      (the "AGREEMENT") pursuant to which NV agreed to make available to the
      Administrators certain funding, inter alia to enable the Company's
      operations to be continued in administration and to fund the costs and
      expenses of the administration (the "FUNDING").

(D)   Under the terms of the Agreement, the Funding is classed as a liability
      incurred by the Administrators under section 19(5) of the Insolvency Act
      1986 (the "ACT") repayable to NV in accordance with the provisions
      contained in the Act as varied by the Agreement.

(E)   NV agreed to defer the repayment of the Funding until such time as the
      realisations were sufficient to fund a distribution in the amount of $2
      million to the Company's non-preferential unsecured creditors (the
      "MINIMUM UNSECURED DISTRIBUTION"). However, the Agreement reserves to the
      Administrators the absolute right in their sole discretion to agree to
      repay the Funding earlier than is otherwise provided in the Agreement
      after making such reserves as they in their sole discretion deem
      appropriate.

                                       2
<PAGE>
(F)   The Liquidators have agreed to make an immediate repayment of $1.5 million
      of the Funding to the Funders (the "EARLY REPAYMENT") subject to the
      terms, conditions, warranties and indemnities contained in this
      supplemental agreement and deed of indemnity (this "DEED").

NOW IT IS HEREBY AGREED as follows:-

1.    INTERPRETATION

1.1   DEFINITIONS

      In this Deed:

      "BUSINESS DAY" means a day (other than a Saturday or a Sunday) on which
      banks are open for general business in London.

1.2   CONSTRUCTION

(a)   In this Agreement, unless the contrary intention appears, a reference to:

      (i)   a person includes an individual, company, unincorporated association
            or body of persons (including a partnership, joint venture or
            consortium), government, state, agency, international organization
            or other entity;

      (ii)  a provision of law is a reference to that provision as amended or
            re-enacted;

      (iii) a Clause is a reference to a clause of this Deed;

      (iv)  this Deed or another document is a reference to this Deed or other
            document as amended;

      (v)   the singular shall include the plural and vice versa;

      (vi)  a person is a reference to or includes its successors, transferees
            and assigns; and

      (vii) a time of day is a reference to London time

      (viii) any indemnity, liability, warranty or obligation whatsoever of the
            Funders or of the Group Company Creditors contained in this Deed
            shall be joint and several.

(b)   The headings in this Deed are for convenience only and are to be ignored
      in construing this Deed.

2.    REPAYMENT AND INDEMNITY

2.1   The Company and/ or the Liquidators shall pay the Early Repayment by
      depositing the amount of $1.5 million into the bank account of Networks
      held at National Westminster Bank plc., High Street, Burnham, sort code
      XXX account number XXX Swift code XXX and the Funders acknowledge that
      such payment shall constitute good discharge of the entitlement of both of
      the Funders to receive the Early Repayment from the Company and/ or the
      Liquidators.

                                       3
<PAGE>
2.2   The Funders further acknowledge that any entitlement to receive repayment
      of the remainder of the Funding from the Company and/or the Liquidators
      shall belong solely to Networks and that both legal and beneficial title
      to such claim vest absolutely in Networks.

2.3   In consideration of the Company and/or the Liquidators making the Early
      Repayment, the Funders hereby undertake and agree with the Company and the
      Liquidators and each of them that the Funders will at all times hereafter:

      (a)   forthwith make a payment to the Company and/or the Liquidators upon
            receipt by either of them of every written notification by the
            Liquidators that they in their sole discretion consider that the
            Company will have insufficient funds to be able to make the Minimum
            Unsecured Distribution, the amount of each such payment being
            limited to the amount necessary (in the opinion of the Liquidators,
            in their sole discretion) to enable the Company to be able to make
            the Minimum Unsecured Distribution plus interest on any amounts
            outstanding under this Clause for more than 7 days after such
            payment was requested by the Liquidators, such interest to be
            payable on a non-compound basis at a rate of 8% p.a. (the
            "INTEREST"), save that the total amount of all such payments made
            pursuant to this Clause shall not exceed the amount of the Early
            Repayment plus the Interest.

      (b)   indemnify and keep indemnified the Company and the Liquidators and
            each of them from and against all actions, proceedings, claims,
            costs, expenses, damages, taxes, penalties and liabilities
            whatsoever brought against or incurred by the Company or the
            Liquidators in relation to their making of the Early Repayment
            including any costs and expenses (including, without limitation,
            legal costs and expenses) incurred by the Company and/or the
            Liquidators in considering or defending any claim in respect of any
            of the liabilities referred to above provided that the Liquidators
            shall give the Funders prompt notice of any such claims made against
            them and, on request by the Funders, shall provide the Funders with
            reasonable opportunity to consult with them in relation to the
            conduct of the defence to any such claims.

      (c)   indemnify and keep indemnified the Company and the Liquidators and
            each of them from and in respect of any misrepresentations by the
            Funders or breaches by the Funders of the terms, conditions and
            warranties contained in this Deed.

3.    FURTHER REDUCTION

3.1   In consideration for the Company and the Liquidators making the Early
      Repayment, the Funders agree to further reduce the amount of their claims
      against the Company and/or the Liquidator in relation to the repayment of
      the Funding by the amounts listed at Schedule 1 to this Deed (being the
      approximate inter company balances owed to the Company by various other
      companies within the same group, such amounts being agreed between the
      parties to this Deed for the purposes of the calculation in this clause)
      (the "INTER COMPANY ASSETS").

3.2   The parties to this Deed agree that, should any amounts be recovered by
      the Company in respect of the Inter Company Assets then the amount of any
      such realisations actually received by the Company shall be deducted from
      the Inter Company Asset value as shown on Schedule 1 to this Deed and the
      new value of the Inter Company Assets shall be used in the calculation
      referred to in clause 3.1 above. For the avoidance of doubt, whilst
      neither the Company nor the Liquidators shall be under any duty to claim
      or pursue a claim for payment

                                       4
<PAGE>
      of any of the Inter Company Assets, this Deed shall not constitute any
      waiver of the rights (if any) of the Company and/ or the Liquidators to
      pursue any such claims.

4.    WARRANTIES

4.1   The Funders warrant that they are the sole parties legally and
      beneficially entitled to the monies that were used towards the Funding.

4.2   The Funders further warrant that they are the sole parties legally and
      beneficially entitled to receive any repayment of the Funding including
      the Early Repayment.

4.3   The Funders and the Group Company Creditors warrant that they are not
      unable to pay their debts (as defined in section 123 of the Act) at the
      time of entering into this Deed, nor will they become unable to pay their
      debts (as defined in section 123 of the Act) as a consequence of executing
      this Deed.

5.    DIVIDEND PAYMENTS

5.1   The Funders and the Group Company Creditors agree that, in consideration
      for the Company and/ or the Liquidators making the Early Repayment, in the
      event that the Company and/ or the Liquidators have insufficient funds to
      pay the full Minimum Unsecured Distribution or whilst any amount payable
      or potentially payable by the Funders under the indemnity given by the
      Funders in Clause 2 above remains outstanding, the following provisions
      shall apply:

      (a)   The distributions payable to the Group Company Creditors
            ("(POUND)X") and the distributions payable to other unsecured
            creditors of the Company (the "OTHER UNSECUREDS") ("(POUND)Y") shall
            be calculated on the basis that the full amount of the Minimum
            Unsecured Distribution is available for distribution.

      (b)   The Group Company Creditors shall subordinate their claims to
            (pound)x to the OTHer Unsecureds' claims to (pound)y and the Company
            and the Liquidators shall be under no duTY to make a distribution to
            the Group Company Creditors until (pound)y has been paid to the
            OTHer Unsecureds.

      (c)   The Group Company Creditors shall waive their entitlement to receive
            the distribution of (pound)x if insufficient funds are available to
            make this distribution and neither the CoMPAny or the Liquidators
            shall be liable to account to the Group Company Creditors for any
            distribution which, in the absence of the provisions of this Deed,
            they would otherwise have been entitled to receive.

6.    MISCELLANEOUS

6.1.  It is hereby agreed and declared between the parties that:

      (a)   this Deed shall continue for the benefit of the successors assigns
            and personal representatives of the Company and the Liquidators and
            be binding upon the successors in office and assigns of the
            Liquidators;

      (b)   this indemnity is a continuing indemnity and will remain in force
            until the earlier of the date upon which the Funders receive a
            written notification of discharge from the

                                       5
<PAGE>

            Liquidators, or the date of the payment by the Liquidators of the
            final dividend to the creditors of the Company.

      (c)   nothing in this Deed shall affect any right of indemnity to which
            the Company or the Liquidators may be entitled by law from the
            Funders or its assets or from any third party.

6.2   This Deed may be executed in any number of counterparts, and this has the
      same effect as if the signatures on the counterparts were on a single copy
      of this Deed.

6.3   No party shall disclose the details of the terms of this Deed to any third
      party not being an employee, agent or adviser of a party unless mutually
      agreed in writing, such agreement not to be unreasonably withheld or
      unless a party has a legal obligation to disclose the terms of this Deed.

6.4   No person who is not a party to this Deed has any rights under the
      Contract (Rights of Third Parties) Act 1999 to rely on or enforce any term
      of this Deed. This Subclause 6.4 does not affect any right or remedy of a
      third party that exists or is available apart from that Act.

6.5   The Liquidators shall not incur any personal liability of any kind under,
      or by virtue of, this Deed, nor in relation to any related matter or
      claim, whether in contract, tort or restitution or by reference to any
      other remedy or right in any other jusridiction or forum.

7.    NOTICES

7.1.  Any notices to be served under this Deed must be in writing and may be
      delivered or sent by post or telex or facsimile process to the party to be
      served at its address appearing in this Deed as follows:

      (a)   to the Company and to the Liquidators at:

            PricewaterhouseCoopers
            Plumtree Court,
            London EC4A 4HT
            Tel. +44 207 583 5000
            Fax: +44 207 212 6000
            marked for the attention
            of Neville Barry Kahn and David James Waterhouse

      (b)   to NV at:

            c/o Wexham Springs,
            Framewood Road,
            Wexham,
            Slough SL3 6PJ
            Tel. +44 1753 661000
            Fax. +44 1753 661011
            marked for the attention
            of Martin Malina, CEO
            cc. Legal Dept.

      (c)   To Networks at:

                                       6
<PAGE>
            c/o Wexham Springs,
            Framewood Road,
            Wexham,
            Slough SL3 6PJ
            Tel. +44 1753 661000
            Fax. +44 1753 661011
            marked for the attention
            of Martin Malina, CEO
            cc. Legal Dept.

      or at such other address telex or facsimile number as that party may have
      notified to the other parties in accordance with this Clause. Any notice
      or other document sent by post shall be sent by prepaid first class post
      (if within the United Kingdom) or by prepaid airmail (if elsewhere).

7.2   Any notice or document shall be deemed to have been served:

      (a)   if delivered, at the time of delivery; or

      (b)   if posted, at 10.00 a.m. on the second Business Day after it was put
            into the post if sent within the United Kingdom, or at 10.00 a.m.
            (local time at the place of destination) on the fifth Business Day
            after it was put into the post if sent by airmail; or

      (c)   if sent by facsimile process, at the expiration of 2 hours after the
            time of despatch, if despatched before 3.00 p.m. (local time at the
            place of destination) on any Business Day, and in any other case at
            10.00 a.m. (local time at the place of destination) on the Business
            Day following the date of despatch.

7.3   In proving service of a notice or document it shall be sufficient to prove
      that delivery was made or that the envelope containing the notice or
      document was properly addressed and posted (either by prepaid first class
      post or by prepaid airmail, as the case may be) or that the telex or
      facsimile message was properly addressed and despatched, as the case may
      be.

8.    GOVERNING LAW

8.1.  This Deed is governed by, and shall be construed in accordance with,
      English law and the parties submit to the jurisdiction of the English
      courts in all matters relating to this Deed.

IN WITNESS whereof the Liquidators, the Funders and the Group Company Creditors
have executed, and the Liquidators have caused the common seal of the Company to
be affixed to, this Deed the day and year first above written.

                                       7
<PAGE>
                                   SCHEDULE 1

                                Intercompany debt

Executed as a Deed and Delivered by       )
MADGE.WEB LIMITED                         )
acting by the Liquidators without         )
personal liability pursuant to the        )
powers conferred on them under the        )
Insolvency Act 1986 in the presence of:   )     /s/ N KHAN

In the presence of:

Witness's signature V COSTA

Name ....................................

Address..................................

..........................................

..........................................

Signed as a Deed by                       )
NEVILLE BARRY KAHN                        )
for and on behalf of the LIQUIDATORS      )
in the presence of:                       )    /s/ N KHAN

In the presence of:

Witness's signature V COSTA

Name.....................................

Address..................................

..........................................

..........................................

                                       8
<PAGE>
Signed as a Deed by                       )
MADGE NETWORKS NV                         )
Acting by Martin Kazimier Malina          )
(Managing Director) acting                )
under the authority of that company       )

                                          /s/ M MALINA

                                          /s/ M K Malina (Director)

In the presence of:

Witness's signature  /s/ K HALLGATE

Name.....................................

Address..................................

..........................................

..........................................

Signed as a Deed by                 )
MADGE NETWORKS LIMITED              )
Acting by                           )
Christopher Semprini                )
and Kirstie Hallgate                )

                                    /s/ C SEPMPRINI             /s/ K HALLGATE
                                    Christopher Semprini        Kirstie Hallgate
                                    Director                    Secretary

Signed as a Deed by                 )
MADGE GROUP SERVICES                )
LIMITED                             )
Acting by                           )
Christopher Semprini                )
and Kirstie Hallgate                )

                                    /s/ C SEMPRINI              /s/ K HALLGATE
                                    Christopher Semprini        Kirstie Hallgate
                                    Director                    Secretary

<PAGE>
Signed as a Deed by                       )
MADGE.WEB INTERNATIONAL                   )
(CI) LIMITED                              )
Acting by Harry Wilson                    )
(Director) acting                         )
under the authority of that company       )

                                          /s/ H WILSON
                                          H Wilson (Director)

In the presence of:
Witness's signature...WITNESSED

Name.....................................

Address..................................

..........................................

..........................................

                                       10

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