CABLETRON SYSTEMS INC
8-K/A, 1998-03-04
COMPUTER COMMUNICATIONS EQUIPMENT
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<PAGE>
 
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549
                                        
                            -----------------------

                                  FORM 8-K/A

                                CURRENT REPORT
                    PURSUANT TO SECTION 13 OR 15(D) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

      Date of Report (Date of Earliest Event Reported):  February 7, 1998
                                                         ----------------

                              CABLETRON SYSTEMS, INC
             -----------------------------------------------------
               (Exact name of Registrant as Specified in Charter)


        DELAWARE                           0-10228             04-2797263
- -----------------------------------    ----------------   -------------------
 (State or Other Jurisdiction          (Commission File     (I.R.S. Employer
     of Incorporation)                      Number)        Identification No.)


         35 Industrial Way, Rochester, NH                     03867
         ---------------------------------------            ---------
         (Address of Principal Executive Offices)           (Zip Code)


                                (603) 332-9400
              ---------------------------------------------------
              (Registrant's telephone number including area code)


================================================================================
<PAGE>
 
     The undersigned Registrant hereby amends Item 7 of its Current Report on
Form 8-K for an event occurring on February 7, 1998 and filed on February 9,
1998, as follows:

ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.
         -------------------------------------------------------------------

         FINANCIAL STATEMENTS OF BUSINESS ACQUIRED

     (A) Audited Financial Statements of Business Acquired for the Fiscal Year
         ---------------------------------------------------------------------
         Ended June 28, 1997.
         ------------------- 

         1. Report of Independent Accountants

         2. Audited Statement of Revenue and Direct Expenses for Fiscal Year
            ended June 28, 1997

         3. Audited Statement of Assets Sold as of June 28, 1997

     (B) Unaudited Financial Statements of Business Acquired for the Three
         -----------------------------------------------------------------
         Months Ended September 27, 1997.
         ------------------------------- 

         1. Unaudited Statement of Revenue and Direct Expenses for the Three
            Months ended September 27, 1997

         2. Unaudited Statement of Assets Sold as of September 27, 1997

     (C) Notes to Financial Statements of Business Acquired
         --------------------------------------------------

         PRO FORMA FINANCIAL INFORMATION

     (D)  Unaudited Pro Forma Financial Statements of the Registrant
          ----------------------------------------------------------

          1. Unaudited Pro Forma Combined Statement of Income for the Fiscal
             Year ended February 28, 1997.

          2. Unaudited Pro Forma Combined Statement of Income for the Nine
             Months ended November 30, 1997.
              
          3. Unaudited Pro Forma Combined Balance Sheet at November 30, 1997.
                                                                                
<PAGE>
 
        EXHIBITS

Exhibit No.  Title
- -----------  -----

    2.1      Asset Purchase Agreement dated as of November 24, 1997 (the "Asset
             Purchase Agreement"), by and among the Registrant, Ctron and
             Digital, including a list briefly identifying the contents of the
             exhibits and disclosure schedules to the Asset Purchase Agreement.
             (Incorporated by reference from Exhibit 2.1 to the Registrant's
             Form 10-Q, for the quarterly period ended November 30, 1997, filed
             on January 14, 1998.)*

    2.2      First Amendment to Asset Purchase Agreement dated as of February 7,
             1998 (the "APA Amendment") by and among the Registrant, Ctron and
             Digital. The exhibits and disclosure schedules to the APA Amendment
             are not included with the APA Amendment. A list briefly identifying
             the contents of such omitted exhibits and disclosure schedules is
             included herein. The Registrant agrees to furnish supplementally to
             the Commission, upon request, a copy of such exhibits and
             disclosure schedules.

   10.1      Reseller and Services Agreement dated as of November 24, 1997, as
             amended, by and between the Registrant and Digital (the "Reseller
             Agreement"), including a list briefly identifying the contents of
             the exhibits and disclosure schedules to the Reseller Agreement.
             (Incorporated by reference from Exhibit 10.1 to the Registrant's
             Form 10-Q, for the quarterly period ended November 30, 1997, filed
             on January 14, 1998.)*
  
   10.2      Amendment No. One to Reseller Agreement dated as of February 7,
             1998 (the "Reseller Amendment"). The exhibits and disclosure
             schedules to the Reseller Amendment are not included with the
             Reseller Amendment. A list briefly identifying the contents of such
             omitted exhibits and disclosure schedules is included herein. The
             Registrant agrees to furnish supplementally to the Commission, upon
             request, a copy of such  exhibits and disclosure schedules.*

*  Confidential Treatment has been requested as to certain portions of this
   agreement.  The term "Confidential Treatment" and the mark (*) is used
   throughout the agreement in order to indicate that material has been omitted
   and separately filed with the Securities and Exchange Commission.

<PAGE>
 
   23        Consent of Coopers & Lybrand L.L.P.
 
         
   99        Press Release of the Registrant dated February 9, 1998.
             (Previously filed)
<PAGE>
 
                                  SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                  CABLETRON SYSTEMS, INC.


    
Date:  March 4, 1998              By:  /s/ David J. Kirkpatrick
                                       ----------------------------------------
                                       Senior Vice President and 
                                       Chief Financial Officer 
                                       
<PAGE>
 
                                 EXHIBIT INDEX

Exhibit Number                Description                                   Page
- --------------                -----------                                   ----
 
   7(A)(1)     Report of Independent Accountants
              
   7(A)(2)     Audited Statement of Revenue and Direct Expenses for the
               Fiscal Year ended June 28, 1997
              
   7(A)(3)     Audited Statement of Assets Sold as of June 28, 1997
              
   7(B)(1)     Unaudited Statement of Revenue and Direct Expenses for
               the Three Months Ended September 27, 1997
              
   7(B)(2)     Unaudited Statement of Assets Sold as of September 27,
               1997
              
   7(C)        Notes to Financial Statements of Business Acquired
              
   7(D)(1)     Unaudited Pro Forma Combined Statement of Income for
               the Fiscal Year ended February 28, 1997
              
   7(D)(2)     Unaudited Pro Forma Combined Statement of Income for
               the Nine Months ended November 30, 1997
                  
   7(D)(3)     Unaudited Pro Forma Combined Balance Sheet at November 30, 1997
                                                                             
   2.1         Asset Purchase Agreement dated as of November 24, 1997
               (the "Asset Purchase Agreement"), by and among the
               Registrant, Ctron, and Digital, including a list briefly
               identifying the contents of the exhibits and disclosure
               schedules to the Asset Purchase Agreement.  (Incorporated
               by reference from Exhibit 2.1 to the Registrant's Form 10-
               Q, for the quarterly period ended November 30, 1997, filed
               on January 14,  1998.)*
              
    2.2        First Amendment to Asset Purchase Agreement dated as of
               February 7, 1998 (the "APA Amendment") by and among
               the Registrant, Ctron and Digital.  The exhibits and
               disclosure schedules to the APA Amendment are not
               included with the APA Amendment.  A list briefly
               identifying the contents of such omitted exhibits and
               disclosure schedules is included herein.  The Registrant
               agrees to furnish supplementally to the Commission, upon
               request, a copy of such exhibits and disclosure schedules.
<PAGE>
 
Exhibit Number                   Description                                Page
- --------------                   -----------                                ----

   10.1        Reseller and Services Agreement dated as of November 24,
               1997, as amended, by and between the Registrant and
               Digital (the "Reseller Agreement"), including a list briefly
               identifying the contents of the exhibits and disclosure
               schedules to the Reseller Agreement.  (Incorporated by
               reference from Exhibit 10.1 to the Registrant's Form 10-Q,
               for the quarterly period ended November 30, 1997, filed on
               January 14, 1998.)*
              
   10.2        Amendment No. One to Reseller Agreement dated as of
               February 7, 1998 (the "Reseller Amendment").  The
               exhibits and disclosure schedules to the Reseller
               Amendment are not included with the Reseller Amendment.
               A list briefly identifying the contents of such omitted
               exhibits and disclosure schedules is included herein.  The
               Registrant agrees to furnish supplementally to the
               Commission, upon request, a copy of such exhibits and
               disclosure schedules.*
              
   23          Consent of Coopers & Lybrand L.L.P.

                        
              
   99          Press Release of the Registrant dated February 9, 1998.
               (Previously filed)

*    Confidential Treatment has been requested as to certain portions of this
     agreement. The term "Confidential Treatment" and the mark (*) is used
     throughout the agreement in order to indicate that material has been
     omitted and separately filed with the Securities and Exchange Commission.

<PAGE>
 
EXHIBIT 7(A)(1)

                       REPORT OF INDEPENDENT ACCOUNTANTS

To the Directors of
Digital Equipment Corporation:

We have audited the accompanying statement of assets sold, of the Network
Products Business of Digital Equipment Corporation (the "Business") as of June
28, 1997, and the related statement of revenue and direct operating expenses,
for the fiscal year ended June 28, 1997.  The statement of assets sold and
statement of revenue and direct operating expenses are the responsibility of
Digital Equipment Corporation's management.  Our responsibility is to express an
opinion on these statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the statement of assets sold and statement of revenue
and direct operating expenses are free of material misstatement.  An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the statements.  An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall presentation of the statement of assets sold and the
statement of revenue and direct operating expenses.  We believe that our audit
provides a reasonable basis for our opinion.

The accompanying statements were prepared to present the assets sold to
Cabletron Systems, Inc. of the Business and the revenue and direct operating
expenses of the Business pursuant to the acquisition agreement described in Note
1, and are not intended to be a complete presentation of the Business' financial
position or results of operations.

In our opinion, the statements referred to above present fairly, in all material
respects, the assets sold of the Business as of June 28, 1997, and its revenue
and direct operating expenses for the year then ended, pursuant to the
acquisition agreement described in Note 1, in conformity with generally accepted
accounting principles.

                                                        Coopers & Lybrand L.L.P.

February 19, 1998
Boston, Massachusetts

<PAGE>
 
EXHIBIT 7(A)(2)

                          NETWORK PRODUCTS BUSINESS OF
                         DIGITAL EQUIPMENT CORPORATION

                            STATEMENT OF REVENUE AND
                           DIRECT OPERATING EXPENSES

                                 (in thousands)

<TABLE> 
<CAPTION> 
                                                     FOR THE
                                                    YEAR ENDED
                                                     JUNE 28,
                                                       1997
                                                    ----------
<S>                                                 <C> 
Revenue:
  External                                          $  187,993
  Affiliates                                           293,778
                                                    ----------
       Total revenue                                   481,771
 
Direct operating expenses:
  Cost of external revenues                            131,132
  Cost of affiliates revenues                          180,154
  Research and engineering                              83,770
  Selling, general and administrative                  124,361
                                                    ----------
       Total direct operating expenses                 519,417
                                                    ----------
Excess revenue over direct operating 
 expenses/(excess direct operating 
  expenses over revenue)                            $  (37,646)
                                                    ==========
</TABLE> 

The accompanying notes are an integral part of the financial statements.

<PAGE>
 
EXHIBIT 7(A)(3)

                          NETWORK PRODUCTS BUSINESS OF
                         DIGITAL EQUIPMENT CORPORATION

                            STATEMENT OF ASSETS SOLD

                                 (in thousands)

<TABLE> 
<CAPTION> 
                                                JUNE 28,
                                                  1997
                                               ----------
<S>                                            <C> 
ASSETS

Inventory                                        $ 62,499
Net property, plant and equipment                  25,637
Prepaid license                                     6,250
Other investment                                    5,000
                                               ----------
  Total assets sold                              $ 99,386
                                               ==========
</TABLE> 

The accompanying notes are an integral part of the financial statements.

<PAGE>
 
EXHIBIT 7(B)(1)

                          NETWORK PRODUCTS BUSINESS OF
                         DIGITAL EQUIPMENT CORPORATION

                            STATEMENT OF REVENUE AND
                           DIRECT OPERATING EXPENSES
                                  (unaudited)
                                 (in thousands)

<TABLE> 
<CAPTION> 
                                           FOR THE THREE
                                            MONTHS ENDED
                                           SEPTEMBER 27,
                                               1997
                                           -------------
<S>                                        <C> 
Revenue:
  External                                      $ 44,844
  Affiliates                                      82,134
                                           -------------
       Total revenue                             126,978
 
Direct operating expenses:
  Cost of external revenues                       26,525
  Cost of affiliates revenues                     43,203
  Research and engineering                        19,370
  Selling, general and administrative             28,827
                                           -------------
       Total direct operating expenses           117,925
                                           -------------
Excess revenue over direct operating 
expenses/(excess direct operating 
expenses over revenue)                          $  9,053
                                           =============
</TABLE> 

The accompanying notes are an integral part of the financial statements.

<PAGE>
 
EXHIBIT 7(B)(2)

                          NETWORK PRODUCTS BUSINESS OF
                         DIGITAL EQUIPMENT CORPORATION

                            STATEMENT OF ASSETS SOLD
                                  (unaudited)
                                 (in thousands)

<TABLE>
<CAPTION>

                                     SEPTEMBER 27,
                                          1997
                                     -------------
<S>                                  <C>  
ASSETS
 
Inventory                                  $58,086
Net property, plant and equipment           25,216
Prepaid license                              5,000
Other investment                             5,000
                                     -------------
  Total assets sold                        $93,302
                                     =============
</TABLE> 


   The accompanying notes are an integral part of the financial statements.

<PAGE>
 
EXHIBIT 7(C)
                         NETWORK PRODUCTS BUSINESS OF              
                         DIGITAL EQUIPMENT CORPORATION             
                                                                   
                         NOTES TO FINANCIAL STATEMENTS             
                                                                   
                             (tables in thousands)                 
            Information as of September 27, 1997 and for the three 
                        months then ended, is unaudited             

1.   BACKGROUND:
     ---------- 
    
Pursuant to an Asset Purchase Agreement (the "Agreement") between Digital
Equipment Corporation ("Digital") and Cabletron Systems, Inc. ("Cabletron"),
dated November 24, 1997 and amended February 7, 1998, Digital sold to Cabletron
certain assets consisting principally of Property, plant and Equipment and
inventory of the Network Products Business of Digital (the "Business"). Digital
and Cabletron are also entering into certain related service and supply
agreements.

The Network Products Business is involved in the design, production and
marketing of computer networking products.

2.   BASIS OF PRESENTATION:
     --------------------- 

The statement of assets sold and the statement of revenue and direct operating
expenses (the "Statements") are derived from the historical books and records of
Digital and present assets sold and revenue and direct operating expenses of the
Business.  With the exception of Plant, property and certain equipment as
specified in the Agreement, the assets and the revenue and direct operating
expenses in the Statements represent the assets and the revenues and direct
operating expenses of the Business sold pursuant to the Agreement.  Certain
direct operating expenses presented in these statements have been allocated
based on management's estimates of the cost of services provided to the Business
by Digital.  Such expenses include manufacturing costs such as distribution and
logistics and corporate overhead.  Management believes that these allocations
are based on assumptions that are reasonable under the circumstances.  The
Business is not a separate taxable entity for federal, state or local income tax
purposes.  The Business' operations are included in the consolidated Digital tax
returns.  No income tax provision/(benefit) has been allocated.  As a result of
the foregoing, the Statements presented may not be indicative of the results of
operations that would have been achieved had the Business been operated as a
nonaffiliated entity.

The Statements of the Business as of September 27, 1997 and for the three months
then ended are unaudited.  All adjustments (consisting only of normal recurring
adjustments) have been made which, in the opinion of management, are necessary
for a fair presentation.  Results of operations 

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF              
                         DIGITAL EQUIPMENT CORPORATION             
                                                                   
                         NOTES TO FINANCIAL STATEMENTS             
                                                                   
                             (tables in thousands)                 
            Information as of September 27, 1997 and for the three 
                        months then ended, is unaudited             


for the three months ended September 27, 1997 are not necessarily indicative of
the results that may be expected for any future period. 


3.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
     ------------------------------------------ 

     The following policies were followed in the Statements presented:

     USE OF ESTIMATES

     The preparation of the Statements requires management to make estimates and
judgments that affect the reported assets sold of the Business and its revenues
and direct operating expense related disclosures.  Such estimates include
inventory reserves and allowance for sales returns. Actual results could differ
from those estimates.

     FISCAL YEAR

     The fiscal year of Digital is the fifty-two/fifty-three week period ending
the Saturday nearest the last day of June.  The fiscal year ended June 28, 1997
included 52 weeks.

     TRANSLATION OF FOREIGN CURRENCIES

     For non-U.S. operations, the U.S. dollar is the functional currency.
Monetary assets and liabilities of foreign subsidiaries are translated into U.S.
dollars at current exchange rates. Nonmonetary assets and liabilities such as
inventories and property, plant and equipment are translated at historical
rates.  Income and expense items are translated at average exchange rates
prevailing during the year, except that inventories and depreciation charged to
operations are translated at historical rates.

     REVENUE RECOGNITION

     Revenue from external sales is recognized at the time the product is
shipped.  Provisions for product sales returns and allowances are recorded in
the same period as the related revenue. 

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF              
                         DIGITAL EQUIPMENT CORPORATION             
                                                                   
                         NOTES TO FINANCIAL STATEMENTS             
                                                                   
                             (tables in thousands)                 
            Information as of September 27, 1997 and for the three 
                        months then ended, is unaudited             


Revenue from affiliates is recognized at the point of transfer to affiliates at
a transfer price negotiated by the business units of Digital.

     INVENTORIES

     Inventories are stated at the lower of cost (first-in, first-out) or
market. Inventories are routinely subject to changes in value, resulting from
rapid technological change, intense price competition and changes in customer
demand patterns. While Digital has provided for estimated declines in market
value of inventories, no estimate can be made of the rate of amounts of loss
that are reasonably possible under various competitive conditions.

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF               
                         DIGITAL EQUIPMENT CORPORATION              
                                                                    
                         NOTES TO FINANCIAL STATEMENTS              
                                                                    
                             (tables in thousands)                  
            Information as of September 27, 1997 and for the three  
                        months then ended, is unaudited              


<TABLE>
<CAPTION>
                            SEPTEMBER 27, 1997  JUNE 28, 1997
                            ------------------  -------------
<S>                         <C>                 <C>
 
          Raw materials                $ 4,645        $ 5,422
          Finished goods                53,441         57,077
                                       -------        -------
          Total inventories            $58,086        $62,499
                                       =======        =======
</TABLE> 

     RESEARCH AND ENGINEERING COSTS

     Research and engineering costs are charged to expense when incurred.

     PROPERTY, PLANT AND EQUIPMENT

     Property, plant and equipment are stated at cost, subject to review for
impairment for significant assets whenever events or changes in circumstances
indicate that the carrying amount of the asset may not be recoverable.
<TABLE>
<CAPTION>
 
                                          SEPTEMBER 27, 1997  JUNE 28, 1997
                                          ------------------  -------------
<S>                                       <C>                 <C>
 
       Land                                          $ 1,783        $ 1,783
       Buildings                                      17,423         17,365
       Machinery and equipment                        53,836         53,126
                                                     -------        -------

       Total property, plant and equipment            73,042         72,274

       Less accumulated depreciation                  47,826         46,637
                                                     -------        -------
       Net property, plant and equipment             $25,216        $25,637
                                                     =======        =======
</TABLE> 

     Depreciation expense was approximately $1,500,000 and $5,950,000 for the
three months ended September 27, 1997 and the year ended June 28, 1997,
respectively.

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF                
                         DIGITAL EQUIPMENT CORPORATION               
                                                                     
                         NOTES TO FINANCIAL STATEMENTS               
                                                                    
                             (tables in thousands)                  
            Information as of September 27, 1997 and for the three  
                        months then ended, is unaudited              

     Depreciation expense is computed principally on the following bases:

              CLASSIFICATION           DEPRECIATION LIVES AND METHODS
              --------------           ------------------------------

           Buildings                   33 years (straight-line)
           Leasehold improvements      Life of assets or term of lease whichever
                                       is shorter (straight-line)
           Machinery and equipment     2 to 10 years (principally accelerated
                                       methods)

     When assets are retired, or otherwise disposed of, the assets and related
accumulated depreciation are removed from the accounts.  Resulting gains and
losses are included in income.

4.   POSTRETIREMENT AND OTHER POSTEMPLOYMENT BENEFITS:
     ------------------------------------------------ 

     PENSION PLANS

     The Business participates in Digital's defined benefit and defined
contribution pension plans (the "Retirement Plan") covering substantially all
employees.  Those Digital Employees who accept employment with Cabletron will
terminate from Digital and will maintain their vested rights in the Retirement
Plan, with liability remaining with Digital.  The benefits are based on years of
service and compensation during the employee's career.  Pension cost is based on
estimated benefit payment formulas.  It is Digital's policy to make tax-
deductible contributions to the plans in accordance with local laws.  The
projected benefit obligation was determined using discount rates of 7.75% for
both the three months ended September 27, 1997 and the year ended June 28, 1997.
For the U.S. pension plan, there was no contribution in the fiscal year.  The
assets of the plans include corporate equity and debt securities, government
securities and the real estate.

     The statement of revenue and direct operating expenses includes allocated
costs as fringe benefits based upon an average cost per employee for the
Retirement Plan of approximately $701,000 and $2,757,000 for the three months
ended  September 27, 1997 and the year ended June 28, 1997, respectively.  These
costs are reported as cost of sales for direct labor and selling, general 

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF               
                         DIGITAL EQUIPMENT CORPORATION              
                                                                    
                         NOTES TO FINANCIAL STATEMENTS              
                                                                    
                             (tables in thousands)                  
            Information as of September 27, 1997 and for the three  
                        months then ended, is unaudited              


and administrative for indirect labor. The measurement dates for all plans were
within 90 days of year-end.

     POSTRETIREMENT BENEFITS OTHER THAN PENSIONS

     The Business participates in Digital's defined benefit postretirement plans
that provide medical and dental benefits for U.S. retirees and their eligible
dependents.  Substantially all of Digital's U.S. employees may become eligible
for postretirement benefits if they reach retirement age while working for
Digital.  During the second quarter of fiscal 1997, Digital amended its U.S.
postretirement medical plan to provide full retiree medical benefits only to
employees working ten years after age 45.  As a result of the amendment, Digital
recognized a one-time curtailment gain. The majority of Digital's non-U.S.
subsidiaries do not offer postretirement benefits other than pensions to
retirees.

     Digital's postretirement benefit plans other than pensions are funded as
costs are incurred. The postretirement benefit obligation was determined using
discount rates of 7.75% for both the three months ended September 27, 1997 and
the year ending June 28, 1997.

     The statement of revenue and direct operating expenses includes allocated
costs/(credits) of fringe benefits (based upon an average cost/(credit) per
employee) for the postretirement benefits of approximately $(417,000) and
$(3,208,000) the three months ended September 27, 1997 and the year ended June
28, 1997, respectively.

5.   INTEREST EXPENSE:
     ---------------- 

There was no direct interest expense incurred by the Business.  However, the
interest expense reflected in the statement of revenue and direct operating
expenses is an allocation of Digital's worldwide interest expense based upon the
ratio of the Business' assets sold to total Digital assets as of September 27,
1997 and June 28, 1997.  Management believes that this method provides a
reasonable basis for allocation within the Business' historical statement of
revenue and direct operating expenses.

                                   Continued
<PAGE>
 
                         NETWORK PRODUCTS BUSINESS OF               
                         DIGITAL EQUIPMENT CORPORATION              
                                                                    
                         NOTES TO FINANCIAL STATEMENTS              
                                                                    
                             (tables in thousands)                  
            Information as of September 27, 1997 and for the three  
                        months then ended, is unaudited              

6.   DEPENDENCE ON CONTRACT ASSEMBLY MANUFACTURER:
     -------------------------------------------- 

     The Business currently relies on a single contract manufacturer to assemble
certain products including switches.  Although a number of contract
manufacturers exist, the interruption or termination of the Business' current
manufacturing relationship could have a short-term adverse effect on its
operations.  Under the Agreement, all of Digital's rights associated with this
contract manufacturer are assigned to Cabletron.

7.   SUBSEQUENT EVENTS:
     ----------------- 

In December 1997, the Business sold its other investment to a third party for
$5,000,000.  The agreement was amended to include in the assets sold to
Cabletron, the proceeds from the sale of the investment.

Digital is also selling to Cabletron a certain building with a net book value of
$8,845,000 as of December 27, 1997.  The building was occupied under an
operating lease at June 28, 1997 and was purchased by Digital in November 1997.



<PAGE>
EXHIBIT 7(D)(1)
 

                    UNAUDITED PRO FORMA COMBINED STATEMENT
                         OF INCOME FOR THE YEAR ENDED
                               FEBRUARY 28, 1997
                                (in thousands)

<TABLE>      
<CAPTION>
                                            2/28/97     12/29/96     PRO FORMA      PRO FORMA
                                           CABLETRON   DIGITAL NPB  ADJUSTMENTS     COMBINED/h/
                                        -------------- -----------  -----------     ---------
<S>                                     <C>            <C>          <C>            <C>
Net Sales                               $   1,406,552      598,034                  2,004,586
Cost of Sales                                 575,107      344,577                    919,684
Gross Profit                                  831,445      253,457            0     1,084,902
 
Research and development                      161,674       84,305                    245,979
Selling, general and administrative           286,469      139,485          396 /b/   429,992
                                                                          2,594 /c/         
                                                                            360 /e/       
                                                                            688 /d/   
Non recurring items                            63,024                                  63,024
Total operating expense                       511,167      223,790        4,038       738,995
 
Operating income                              320,278       29,667       (4,038)      345,907
 
Interest income                                19,422                    (5,810)/a/    13,612
Income before income taxes                    339,700       29,667       (9,848)      359,519
 
Income taxes                                  117,575                    (3,863)/g/   125,349
                                                                         11,637 /f/          
Net income                                    222,125       29,667      (17,622)      234,170
 
Earnings per share                               1.43                                    1.51
Shares outstanding                            155,207                                 155,207
</TABLE>       

/a/  Reduction of interest income due to cash portion of the purchase price 
     of $129,107 from available cash at Cabletron's historical investment
     rate of return of 4.5%.
/b/  Amortization related to goodwill.
/c/  Amortization related to existing patents and technologies.
/d/  Amortization related to assembled workforce.
/e/  Depreciation on building acquired.
/f/  Tax effect of DNPG operating income at Cabletron's marginal tax rate of
     39.225%.
/g/  Tax effect of (a), (b), (c), (d), and (e) at Cabletron's marginal tax rate 
     of 39.225%.
/h/  Not included in the Pro Forma Combined Statements of Income are non-
     recurring expenses of $380,370 (pre-tax) as disclosed in the Pro Forma
     Balance Sheet as these are unusual and relate directly to the acquisition.


   
NOTE: The above Statement of Income combines Cabletron's fiscal year ended 
February 28, 1997 and Digital NPB's twelve months ended December 29, 1996.  
     


                          

<PAGE>
 
EXHIBIT 7(D)(2)    UNAUDITED PRO FORMA COMBINED STATEMENT OF
                          INCOME FOR THE NINE MONTHS
                            ENDED NOVEMBER 30, 1997
                                (in thousands)


<TABLE>      
<CAPTION>
                                            11/30/97        9/27/97        PRO FORMA    PRO FORMA
                                           CABLETRON      DIGITAL NPB     ADJUSTMENTS   COMBINED/h/
                                           ---------      -----------     -----------   ---------
<S>                                        <C>            <C>             <C>         <C>
Net sales                                  $1,065,808      393,717                    1,459,525
Cost of sales                                 476,847      230,489                      707,336
Gross profit                                  588,961      163,228            0         752,189
 
Research & development                        134,583       60,666                      195,249
Selling, general & administrative             261,848       89,958          297 /b/     354,835
                                                                            270 /e/             
                                                                          1,946 /c/            
                                                                            516 /d/
Total operating expense                       396,431      150,624        3,029         550,084
 
Operating income                              192,530       12,604       (3,029)        202,105
 
Interest income                                14,269                    (4,357)/a/       9,912
Income before income taxes                    206,799       12,604       (7,386)        212,017
 
Income Taxes                                   70,490                    (2,897)/g/      72,537
                                                                          4,944 /f/            
 
Net Income                                    136,309       12,604       (9,433)        139,480
 
Earnings per share                               0.87                                      0.89
Shares outstanding                            157,527                                   157,527
</TABLE>       

/a/  Reduction of interest income due to cash portion of the purchase price of
     $129,107 from available cash at Cabletron's historical investment rate of
     return of 4.5%.

/b/  Amortization related to goodwill.       

/c/  Amortization related to existing patents and technologies.

/d/  Amortization related to assembled workforce.
    
/e/  Depreciation on building acquired.
    
/f/  Tax effect of DNPG operating income at Cabletron's marginal tax rate of 
     39.225%

/g/  Tax effect of (a), (b), (c), (d) and (e) at Cabletron's marginal tax rate 
     of 39.225%

/h/  Not included in the Pro Forma Combined Statements of Income are non-
     recurring expenses of $380,370 (pre-tax) as disclosed in the Pro Forma
     Balance Sheet as these are unusual and relate directly to the acquisition.

NOTE: The above Statement of Income Combines Cabletron's nine months ended 
November 30, 1997 and Digital NPB's nine months ended September 27, 1997.


<PAGE>
 
EXHIBIT 7(D)(3)          
                  UNAUDITED PRO FORMA COMBINED BALANCE SHEET
                             AT NOVEMBER 30, 1997
                                (in thousands)

<TABLE>      
<CAPTION>

                                                
                                               11/30/97       9/27/97                PRO FORMA     PRO FORMA  
                                               CABLETRON      DIGITAL NPB           ADJUSTMENTS     COMBINED
                                               ---------     ------------          ------------    ---------
<S>                                            <C>           <C>                   <C>             <C>
Assets                                  
Cash and cash equivalents                       208,926                            (129,107)/a/      77,819
Short-term investments                          214,680                                             214,680
Accounts Receivable                             298,672                                             298,672
Inventories                                     280,021          58,086             (18,102)/e/     298,005
                                                                                    (22,000)/L/            
Deferred income taxes                            57,691                             149,200 /o/     206,891
Prepaid exp. & other assets                      37,521          10,000              (5,000)/j/      37,521
                                                                                     (5,000)/c/
 Total current assets                         1,095,511          68,086             (30,009)      1,133,588
                                                                                                           
Long-term investments                           148,554                                             148,554
Property, plant & equipment                     212,023          25,216              10,800 /i/     248,039
Other long-term assets                                                                3,166 /b/      29,416
                                                                                     20,750 /g/            
                                                                                      5,500 /h/            
Long term deferred income taxes                  30,756                                              30,756
                                                                                                           
 Total assets                                 1,486,844          93,302              10,207       1,590,353 
                                              =============================================       =========
                                        
Liabilities & stockholders' equity                                     
Accounts payable                                 69,003                                              69,003
Accrued expenses                                169,332                               7,000 /n/     214,702
                                                                                      5,000 /m/            
                                                                                     33,370 /k/            
Other short term liabilities                                                        165,633 /d/     165,633
Income taxes payable                              5,282                                               5,282
 Total current liabilities                      243,617            0                211,003         454,620
                                                                                                           
Long-term liabilities                                                               123,676 /d/     123,676
Deferred income taxes                             4,577                                               4,577
                                                                                                           
Total liabilities                               248,194            0                334,679         582,873
                                                                                                           
Total stockholders' equity                    1,238,650                            (325,000)/f/   1,007,480
                                                                                    149,200 /o/            
                                                                                    (33,370)/k/            
                                                                                    (22,000)/L/            
                                                                                                           
Total liabilities & stockholders' equity      1,486,844            0                103,509       1,590,353 
                                              =============================================       =========
</TABLE> 

/a/ Purchase price of $430,107. Cash payments were made in the amount of
    $129,107 (including acquisition costs of $500.) The remainder of the price
    consisted of product credits of $289,309, net of $11,691 net present value 
    discount.

/b/ Record goodwill $3,166

/c/ Adjust for assets received in cash, $5,000

/d/ Record short term product credits ($165,633 net of $2,867 net present value
    discount) and long term product credits ($123,676 net of $8,824 net present
    value discount)

/e/ Write down of Digital NPB inventory due to product overlap as a result of
    the combined product line and adjustment of reserves to conform to
    Cabletron's policies.

/f/ In-process research and devlopment costs of $325,000 were written off in
    connection with the acquisition. The charge to operations for such acquired
    technology in process is excluded from the unaudited Pro Forma Combined
    Statements of Income as it is non-recurring and unusual and relates
    directly to the acquisition.

/g/ Record fair value of existing patents and technologies acquired.

/h/ Record fair value of assembled work force acquired.

/i/ Record fair value of building acquired.

/j/ Write off of software licenses

/k/ To record effect of acquisition related expenses including:
    Personnel related                   14,200
    Information systems                  7,000
    Marketing related                    5,000
    Professional fees                    3,150
    Manufacturing related                2,000
    Facilities & relocation              1,300
    Misc. taxes                            720
                                      --------
                                        33,370
    The charges to operations for the above expenses are excluded from the
    unaudited Pro Forma Combined Statements of Income as these are non-
    recurring and unusual and relate directly to the acquisition.

/L/ Adjustment of Cabletron's inventory rendered obsolete and excess due to
    product overlap. The charge to operations for such inventory is excluded
    from the unaudited Pro Forma Combined Statements of Income as it is non-
    recurring and unusual and relates directly to the acquisition.

/m/ Record liability associated with cancellation of vendor commitments as a 
    result of a change in production plans.

/n/ Severance & Relocation

/o/ Tax effect of expenses (f),(k), & (L) at Cabletron's marginal tax rate of 
    39.225%.


<PAGE>
 
                                                                     EXHIBIT 2.2
                                                                     -----------

                  FIRST AMENDMENT TO ASSET PURCHASE AGREEMENT

     First Amendment to Asset Purchase Agreement (the "Amendment"), dated as of
February 7, 1998 by and among Cabletron Systems, Inc., a Delaware corporation
and Ctron Acquisition, Inc., a Delaware corporation and a wholly-owned
subsidiary of Cabletron Systems, Inc., and Digital Equipment Corporation, a
Massachusetts corporation.

     Whereas, pursuant to an Asset Purchase Agreement between Seller and the
Buyer dated as of November 24, 1997, as amended (the "Purchase Agreement") the
Seller agreed to sell and the Buyer agreed to purchase the Acquired Assets
relating to Seller's Network Products Business;

     Whereas, on the date hereof, the parties are conducting the Closing of the
transactions contemplated by the Purchase Agreement with respect to the business
of the NPB in the United States, including the hiring by Buyer of the NPB
employees and the assignment of the Acquired Assets located in the United
States, including the inventory and any distributor or other reseller contracts
of the NPB worldwide, but excluding the hiring by Buyer of the NPB Employees and
the assignment of the Acquired Assets (other than the inventory) located outside
the United States;

     Whereas, in connection with the Closing, on the date hereof the parties are
entering into certain other agreements, including a certain Transitional
Services Agreement and a certain International Operating Agreement, and a
certain Contract Supply and Manufacturing Agreement, each by and among the
parties to the Purchase Agreement; and

     Whereas, the parties desire to make certain amendments to the Purchase
Agreement and set out certain other agreements related to the Closing.

     Now, Therefore, in consideration of the premises and of the mutual
agreements, provisions, covenants and conditions contained in this Agreement,
Seller and the Buyer hereby agree as follows:

     SECTION 1.  Definitions.  Capitalized terms used herein and not otherwise
                 -----------                                                  
defined in this Agreement shall have the meanings assigned such terms in the
Purchase Agreement.

     SECTION 2.  Closing. Except as expressly set forth herein, the Closing of
                 -------                                                      
the transactions contemplated by the Purchase Agreement has occurred on the date
hereof in accordance with the terms of the Purchase Agreement.  The transactions
consummated at the Closing include, without limitation, (i) in the United
States, (a) the hiring by Buyer of the Hired Employees whose principal work
location is the United States, and (b) the assignment of the Acquired Assets
located in the United States, and (ii) throughout the world, (a) the assignment
of all Acquired Assets that constitute inventory, and (b) the assignment of any
<PAGE>
 
Contracts with any distributor or other reseller of the NPB, but specifically
excluding the hiring by Buyer of the NPB Employees whose principal work location
is outside of the United States and the assignment of the Acquired Assets (other
than inventory) located outside the United States.  Notwithstanding anything to
the contrary in the Purchase Agreement, the Closing shall be deemed to have
occurred at 11:59 p.m. on the Closing Date.

     SECTION 3.  Consideration.
                 ------------- 

     (a) This Amendment hereby terminates and renders null and void a letter
agreement dated December 8, 1997 among Buyer and Seller which amended the
Purchase Agreement.

     (b) The Purchase Agreement is hereby amended as follows:

          (i)  Section 2.5(a) is amended in its entirety to read as follows:

     Cash.  $132,725,000.00 in cash (subject to adjustment pursuant to Section
     ----                                                                     
     2.6). Notwithstanding the preceding sentence, at the Closing Buyer will pay
     $127,832,452.70 by wire transfer to the Seller in accordance with written
     instructions of the Seller given to the Buyer at least two business days
     prior to the Closing which amount represents payment in full of the cash
     portion of the Purchase Price minus adjustments for monies owed between the
     Parties.  These adjustments are set forth in detail in Schedule 3.

          (ii) Section 2.5(b) is hereby deleted.

          (iii) The first paragraph of Section 2.5(C)(ii) is amended in its
     entirety to read as follows:

     Second Year Product Credits.  Subject to adjustment pursuant to Section
     2.6, $132,500,000 in Second Year Product Credits.

          (iv) Section 2.1(d) is amended in its entirety to read as follows:

     (d)  the securities of Ipsilon Networks, Inc. owned by the Seller (or the
     $4,999,999.80 cash value of such securities);

          (v) Section 2.6(a)(ii) is amended to add the following new subsection:

     (a)(ii)  Solely for purposes of this Section 2.6(a)(ii), the Asset Value
     shall be deemed not to include up to $1.5 million in Stage 1 Assets.

     SECTION 4.  Financial Statements. Section 5.27 of the Purchase Agreement is
                 --------------------                                           
amended in its entirety to read as follows:

                                      -2-
<PAGE>
 
     Form 8-K Financial Statements.  Seller agrees to engage its outside
     -----------------------------                                      
     accountants to assist, at the Buyer's expense, in the preparation and audit
     of the financial statements required by Buyer for its 8-K as set forth in
     Schedule 1 (the "Financial Statements"). Seller agrees to deliver such
     Financial Statements by February 23, 1998.  For each day beyond February
     23, 1998 that Seller is late in delivering such Financial Statements,
     Seller agrees to pay Buyer $25,000.  For each day prior to February 20,
     1998 that Seller is early in delivering such Financial Statements, Buyer
     agrees to pay Seller $25,000.  Seller agrees to make reasonably available
     the Seller financial staff that prepared the Financial Statements during
     the days immediately following delivery of the financial statements for the
     purposes of conducting diligence and making any necessary amendments.  The
     Financial Statements shall be prepared in accordance with United States
     Generally Accepted Accounting Principles.  In addition, Seller agrees to
     use all reasonable efforts to assist Buyer in obtaining such comfort
     letters, consents and other similar items from Seller's outside accountants
     required by Buyer in a timely fashion in connection with its use of the
     Financial Statements, both in connection with the 8-K and future filings
     with the Securities Exchange Commission which contain or incorporate by
     reference the Financial Statements, including a Registration Statement on
     Form S-4 which Buyer anticipates filing in connection with its acquisition
     of Yago Systems, Inc.

     SECTION 5.  Transfer Taxes.  Schedule 2 sets forth the amounts of the
                 --------------                                           
various Transfer Taxes to be paid in connection with the Closing.  In the event
that Transfer Taxes are required to be paid by either party subsequent to the
Closing, the party not making such payment agrees to reimburse or otherwise pay
in cash the party making the payment for one-half of such Transfer Taxes.  This
provision is intended to supplement, and not replace, any provisions in the
Purchase Agreement concerning Transfer Taxes.

     SECTION 6.  Amended Schedules.  The following Exhibits and Schedules to the
                 -----------------                                              
Purchase Agreement are amended as set forth in the Exhibits and Schedules
attached hereto: Exhibit A, Schedule 1.2, Schedule 1.3, Schedule 1.6, Schedule
2.1(a), Schedule 2.1(h), Schedule 2.1(x) and Disclosure Schedule (S)(S)3.4,
3.15(a) and 3.16(a).

       Patents in Dispute
       ------------------

     The Parties are in dispute as to whether Patent Number PD25665 (Buffer
     Management Scheme With Packet Based Flow Control Algorithm) should be
     assigned to Buyer or retained by Seller pursuant to the Asset Purchase
     Agreement.  The Parties agree to further investigate the source and use of
     this patent in order to resolve this issue by mutual agreement following
     the Closing.

     SECTION 7.  Closings in Foreign Countries.  The parties agree to continue
                 -----------------------------                                
to use all reasonable efforts to consummate the closing of the transactions
contemplated by the Purchase Agreement in countries other than the United
States.  Where reasonably practicable (including economic effect), the parties
will agree to close the transactions in any particular country at the end of
Seller's fiscal month or fiscal week.  In the event that despite the use of all
reasonable efforts by both parties to resolve a Local Transfer Impediment, the
closing of the transactions contemplated by the Purchase Agreement in any
particular country has not occurred within 

                                      -3-
<PAGE>
 
nine months following the effective date of this Agreement, Buyer and Seller
will cooperate to develop a mutually agreeable solution that finally resolves
the transactions contemplated by the Purchase Agreement with respect to such
country within twelve months following the effective date of this Agreement,
provided that the dates set forth in this provision shall not be applicable to
- --------
any country where the transaction continues to be under review by any agency,
court, panel, council, governmental entity or similar body or where the parties
have not exhausted the reasonable steps available to them to resolve a Local
Transfer Impediment.

     SECTION 8.  Assignments. As of the Closing, Seller has been unable to
                 -----------                                              
obtain consent to assign certain Contracts or Assigned Licenses that are
necessary to the manufacture of certain NPB Products.  Seller agrees that,
subject to compliance with all of the applicable terms of the Contract or
Assigned License and the Contract Supply and Manufacturing Agreement (or any
replacement agreement) including the payment provisions, Seller shall continue
to employ its rights under such Contracts or Licenses, including the Super Lat
license under the Meridian Agreement, to manufacture products or components, as
applicable, and to sell such products or components to Buyer. This provision
shall terminate (i) with respect to any particular Contract or Assigned License
that has terminated (unless terminated by Seller prior to its termination in the
ordinary course), or (ii) with respect to all of the applicable Contracts and
Assigned Licenses, upon termination of the Contract Supply and Manufacturing
Agreement, provided that in the event of any termination of the Contract Supply
and Manufacturing Agreement the parties shall use reasonable good faith efforts
to enter into a corporate agreement addressing such Contracts and Assigned
Licenses.  This provision is not intended to supersede any provision of the
Purchase Agreement.

          Meridian LAT License.  Seller is entitled to certain net LAT Base
          --------------------                                             
     License and royalty fees pursuant to a LAT Cross Licensing/Technology
     Exchange/Marketing/ Service Agreement between Digital Equipment Corporation
     and Meridian Technology Corporation executed November 16, 1992 and amended
     March 1, 1994 (the "Meridian Agreement").  Seller agrees to pay to Buyer
     all net LAT Base License and royalty fees actually received by it from
     Meridian under the Meridian Agreement within 30 days of receipt by Seller
     and Buyer agrees to assume all obligations of Seller under such Agreement
     related to the license pursuant to which such fees are paid.

     SECTION 9.  Certificates.  Section 6.1(f) of the Purchase Agreement is
                 ------------                                              
amended in its entirety to read as follows:

     Certificates.  The Seller shall have delivered to the Buyer a certificate
     ------------                                                             
     signed by an authorized officer to the effect that each of the conditions
     specified above in (S) 6.1(a), (b) and (d) are satisfied in all respects;

     SECTION 10.  Counterparts.  This Amendment may be executed in any number of
                  ------------                                                  
counterparts, each of which shall be deemed to be an original and all of which
together shall be deemed to be one and the same document.

                                      -4-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of
the day and year first above written.


                              CABLETRON SYSTEMS, INC.


                              By: /s/ David J. Kirkpatrick
                                  -----------------------------------

                              Name:  David J. Kirkpatrick
                                     -------------------------------

                              Title:  Senior Vice President and 
                                      Chief Financial Officer
                                      -------------------------------


                              CTRON ACQUISITION, INC.


                              By: /s/ David J. Kirkpatrick
                                  ------------------------------------

                              Name:  David J. Kirkpatrick
                                     -------------------------------

                              Title:  Treasurer
                                      -------------------------------------


                              DIGITAL EQUIPMENT CORPORATION


                              By: /s/ Chris Sullivan
                                  ---------------------------------------

                              Name:  Chris Sullivan
                                     ----------------------------------

                              Title:   Vice President, Finance
                                       -------------------------------

                                      -5-
<PAGE>
 
                            CABLETRON SYSTEMS, INC.
                            SCHEDULES AND EXHIBITS
                                     INDEX
 
Schedule 1         --   Financial Statements to be Delivered

Schedule 2         --   Transfer Taxes
 
Schedule 3         --   Purchase Price Allocation
 
  Exhibit A        --   Statement of Assets
 
Schedule 1.2       --   Assigned Licenses
 
Schedule 1.3       --   Assigned Patents
 
Schedule 1.6       --   Retained Patents
 
Schedule 1.2(a)    --   Encumbrances on Acquired Assets
 
Schedule 2.1(h)    --   Contracts
 
Schedule 2.1(x)    --   International Assets

Disclosure Schedule to Asset Purchase Agreement

     Section 3.4

     Section 3.15(a)
 
     Section 3.16(b)

                                      -6-

<PAGE>
 
                                                                    EXHIBIT 10.2
                                                                    ------------

            AMENDMENT NUMBER ONE TO RESELLER AND SERVICES AGREEMENT
                        BETWEEN CABLETRON SYSTEMS, INC.
                       AND DIGITAL EQUIPMENT CORPORATION

     This Agreement, dated February 7, 1998, constitutes Amendment number one
(1) to the Reseller and Services Agreement by and between Cabletron Systems,
Inc. ("Seller") and Digital Equipment Corporation ("Digital") dated November 24,
1997 ("Reseller Agreement"). Capitalized terms not otherwise defined herein
shall have the respective meanings ascribed to them in the Reseller Agreement.

     WHEREAS, Seller and Digital desire to amend certain provisions of the
Reseller Agreement,
 
     NOW THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, Seller and Digital hereby agree as
follows:

The Reseller Agreement is hereby amended by either substituting the following
sections and appendices for the corresponding sections and appendices contained
in the Reseller Agreement or, in cases where a particular section set forth
below is not currently contained in the Reseller Agreement (as indicated by the
words "(Insert as new section)" immediately preceding the new section), by
inserting such section into the appropriate place in the Reseller Agreement.  To
the extent that the insertion of a new section would alter the section numbering
of the Reseller Agreement, the Reseller Agreement should be renumbered
accordingly.  For the purposes of this Amendment, however, preexisting sections
will be numbered as they were in the Reseller Agreement prior to this Amendment.

1.40 "PRODUCT INFORMATION" shall mean descriptions, documentation, technical
     tips, Software support tools, publications, technical newsletters, training
     materials and all other information in any media which Digital may
     reasonably require in order to sell, support and maintain the Products
     and/or deliver Services to Customers.

4.4  The price of Spare Parts used for the provision of Contract Services of NPB
     Products shall be [ * ] from the pricing set forth in Sections 4.1 and 4.2.
     Unless otherwise agreed between the parties, no MDF or incentive programs
     shall apply to such purchases.  The price for repair services for NPB
     Product Spare Parts

* Confidential Treatment has been requested as to certain portions of this
  agreement.  The term "Confidential Treatment and the mark (*) is used
  throughout this agreement in order to indicate that material has been omitted
  and separately filed with the Securities and Exchange Commission.
<PAGE>
 
provided in connection with Digital's provision of Contract Services for NPB
Products shall be [ * ].

4.7   Seller's prices, when sold and/or shipped to Digital, shall include all
      charges such as packaging, packing, customs duties imposed before passage
      of title, and all taxes except sales, use and other such taxes imposed
      upon the sale or transfer of Product for which Digital is solely
      responsible under applicable law and for which Digital is properly in
      voiced by Seller. If Product or Spare Parts are supplied without normal
      packaging or packing, Seller will pass on to Digital its resultant cost
      savings in connection therewith.

6.1   Prior to delivery, Seller shall insure that all Products conform in all
      material respects to the guidelines set forth on Schedules 6.1 and 6.1.1
      as applicable.

6.2   Digital may perform source inspection and quality assurance reviews in
      accordance with the Quality Assurance Guidelines contained in Schedules
      6.1 and 6.1.1 as applicable, but this shall in no way relieve Seller of
      its obligation to materially conform to the guidelines set forth in
      Schedules 6.1 and 6.1.1 respectively, nor does said right of inspection
      waive (i) any of Seller's obligations hereunder; (ii) the rights of
      Digital to inspect the Products upon delivery; or (iii) the specific
      Product Warranty provisions. Seller shall assist Digital, at Digital's
      request, in performing such inspection and reviews.

6.3   Seller shall have fourteen (14) days from the date of notification by
      Digital of a deviation from the Quality Assurance Guidelines or, for
      Seller Products, the quality guidelines established by the parties
      pursuant to the Service Implementation Plan described in Section 8.2.3, to
      cure such deviation. In the event such a deviation is not cured within
      fourteen (14) days, Digital, at its option, may:

6.3.2 immediately terminate Seller's right to continue to use the Digital
      Marks on any Digital-Branded Products.

*    Confidential Treatment

                                      -2-
<PAGE>
 
7.4   Seller shall pay Digital [ * ]. The foregoing takes into account the fact
      that Digital will provide as part of the Warranty Services (i) call
      handling, (ii) pur chasing, stocking and storage of Spare Parts and
      replacement whole units, and (iii) logistics and revision management, and
      will not be providing repair services.

8.2.3 Digital shall not commence its obligations under Sections 8.2.1 and 8.2.2
      until ninety (90) days following the Closing Date. During such ninety (90)
      day period, Seller and Digital shall enter into a mutually agreeable
      service implementation plan (the "Service Implementation Plan") which
      provides sufficient additional details beyond the contractual provisions
      necessary to ensure a quality service delivery and an efficient working
      relationship between Seller and Digital for the servicing of Seller
      Products. Such Service Implementation Plan shall include, but not be
      limited to, sufficient detail on: (i) quality; (ii) Product Information
      and documentation in any medium and from any Seller source, system, or
      database; and (iii) branding. The agreement by the parties with respect to
      such plan shall be subject to the Escalation Process contained in Schedule
      3.1 of the Reseller Agreement, and the scheduling of the agreement process
      shall be given sufficient priority to ensure its successful completion.

8.8   Seller acknowledges that Digital's worldwide implementation of the
      Services contemplated by this Agreement will likely be accomplished in a
      phased approach. Seller also acknowledges that Digital's ability and
      commitment to perform such Services is greatly dependent on Seller's
      delivery to Digital of all necessary training, tools, diagnostics,
      information and support ("Readiness Requirements") in a timely and
      efficient manner. As such, Seller will work with Digital to establish a
      Service Readiness Plan, (the "Plan"). The Plan shall be incorporated by
      reference into this Agreement, and shall establish detailed operational
      instructions concerning how to invoke the service relationship created by
      this Agreement. The parties

*    Confidential Treatment

                                      -3-
<PAGE>
 
       agree to assign the necessary resources to begin the development of the
       Plan immediately upon execution of this Agreement. Specifics to be
       included in the Plan shall be: (i) Seller's deliverables respecting
       Digital's implementation of Warranty Services and Contract Services; (ii)
       logistics planning and disposition requirements; (iii) training and
       information/documentation deliverables for all NPB Products, Digital-
       Branded Products and Seller Products; (iv) Digital staffing and training
       requirements to satisfy mutually acceptable certification levels; (v)
       field deployment (persons/equipment); (vi) communications and
       infrastructure requirements; (vii) problem tracking and reporting
       requirements; (viii) sales forecasting details (types/frequency) by
       region/territory; and (ix) service quality metrics. Readiness
       Requirements for New Products shall be added to the Plan by amendment.

8.13   Seller will package Spare Parts consistent in all material respects with
       MCS' current packaging requirements, a copy of which is attached hereto
       as Schedule 6.1.

8.15   Seller's exclusive remedies for Digital's failure to perform Services in
       accordance with the applicable descriptions of such Services agreed to by
       the parties are i) to request that Digital perform conforming Services;
       or ii) to receive a refund of the amount(s) paid to Digital for such
       Services. Digital shall not be liable for any costs or other expenses
       incurred by Seller in connection with such failure.

9.1.1. Digital may terminate this license with respect to an individual Digital-
       Branded Product if Seller neglects or fails to perform or observe any of
       the obligations set forth on Schedule 9.1.1 with respect to such
       individual Digital-Branded Product if Digital determines, in its sole
       discretion, that such neglect or failure causes a material adverse effect
       on Digital's trademark rights, and such condition is not remedied within
       thirty (30) days after written notice of such neglect or failure; or if
       Seller enters bankruptcy proceedings, becomes insolvent, makes an
       assignment for the benefit of its creditors, discontinues its business or
       is placed in receivership. Notwithstanding the foregoing, if Seller is
       using reasonable and prompt efforts to cure such neglect or failure,
       Digital shall not exercise its right of termination hereunder until the
       earlier of (i) ten (10) days after the end such thirty (30) day cure
       period, and (ii) Seller ceases using reasonable efforts to cure such
       neglect or failure, as determined in Digital's sole discretion.

                                      -4-
<PAGE>
 
9.3    Seller shall submit all uses of the Digital Marks and the Digital Brand
       to Digital for its prior approval, which shall not be unreasonably
       withheld. Digital shall use reasonable efforts to grant or deny such
       approval promptly. As of the Closing Date, the Digital contact person for
       such approval shall be Jean Bouchenoire. All current uses of the Digital
       Marks and the Digital Brand on NPB Products and NPB Product packaging
       shall be deemed to have been approved. Digital's approval of any standard
       layouts and designs shall be limited to ensuring that such layouts and
       designs comply with the standards set forth in Schedule 9.1.1, as the
       same may be amended from time to time. After a layout or design has been
       approved. Seller may use the approved layouts or designs and
       substantially identical layouts and designs upon products, packaging and
       marketing collateral without further approval of Digital, except in the
       event that the standards set forth on Schedule 9.1.1 have been modified
       by Digital, in which case all such layouts and designs must be
       resubmitted to Digital for reapproval. The parties shall meet once per
       year for Digital to review all uses of the Digital Marks, the Seller
       Trade name, and the Digital Brand and confirm that such uses are in
       accordance with this Agreement.

9.6    After the Closing Date, the Seller Products listed on Schedule 9.6 shall
       be sold under the Digital Marks in accordance with the Product Road Map.
       Before the First Revenue Ship of such Products under the Digital Marks,
       Seller must have met all of Digital's requirements with respect to the
       items listed in Section 8.8 to ensure that Digital is prepared to be the
       exclusive provider of Warranty Services and the Strategic Network
       Services Partner for Contract Services for all such Products. Digital
       shall use reasonable efforts to expedite the approval of the branding of
       all such Seller Products with the Digital Marks, it being understood that
       the average time required is expected to be no less than eight (8) weeks
       but in no event shall exceed twelve (12) weeks after the Closing Date.

9.9    Seller shall be entitled to refer to an organization within Seller that
       predominantly sells Digital-Branded Products as the "DIGITAL Network
       Products Group, a Cabletron Systems, Inc. Company" (the "Seller Trade
       name").

9.9.2  Seller may not use the word mark "DIGITAL" other than i) as part of
       the Seller Trade name, ii) in all capital letters, and (iii) as set forth
       in this Agreement.

                                      -5-
<PAGE>
 
9.9.4  The Seller Trade name and the Relationship Logo may only be used to
       identify the group or division within Seller which is manufacturing,
       selling, marketing, and servicing Digital-Branded Products and doing
       business under the Seller Trade name and the Relationship Logo. They may
       not be used for product branding.

9.9.7  The example set forth on Schedule 9.9.5 illustrates permitted uses of
       Seller Trade name and Relationship Logo, subject to Digital's approval
       with respect to color, size and appearance of the Digital Brand.

9.10   Seller shall abide by the Digital Trademark License and Quality
       Requirements terms set forth on Schedule 9.1.1.

11.2   Seller hereby grants to Digital and its Authorized Warranty Service
       Providers a royalty-free, non-exclusive, worldwide license to reproduce
       and distribute, in whole or in part, (i) all Product Information
       excluding documentation and training materials which the Seller markets
       for profit; and (ii) any other service-related materials or documentation
       provided by Seller to Digital or Digital Partners hereunder.

12.1   Digital owns all right, title and interest, including all Intellectual
       Property Rights in all materials (including diagnostic software, hardware
       and software tools and associated documentation) developed by Digital for
       its own use or the use of its Authorized Warranty Service Providers in
       the performance of Services.

12.2   Seller hereby grants to Digital and its Digital Partners a non-exclusive,
       worldwide license, until the expiration of the last Digital Services
       Agreement, to duplicate, use, and distribute, directly and indirectly,
       all Software, including revisions and updates. All Software, including
       revisions and updates, shall be available for duplication and
       distribution internally by Digital, and to Customers and/or third parties
       via down-loading from Seller's on-line database(s). Digital will pay
       Seller a royalty on any Software that is duplicated and distributed by
       Digital, at rates to be negotiated by the parties. Royalty payments shall
       be reduced by the amount of any tax required to be withheld against
       Seller income from royalties by a government or governmental agency;
       provided that the parties shall cooperate in good faith to reduce such
       -------- ---- 
       withholding to the extent legally possible. Where reduced or nil rates of
       withholding tax apply under the provisions of double

                                      -6-
<PAGE>
 
     
       taxation treaties, Seller shall provide Digital with the authorizations
       necessary to apply for such rates, and Digital shall make such filings as
       may be necessary to claim the benefit of the reduced or nil rate. Digital
       shall provide Seller any certification of the amounts withheld and copies
       of any certificates furnished by a withholding jurisdiction. In the event
       that Digital makes any payment without deduction of withholding tax,
       Seller shall indemnify Digital against any subsequent liability arising
       from the failure to make such a deduction. Prior to First Revenue Ship of
       a Software Product or revision or upgrade thereto, Seller will provide
       Digital with a distribution master for such Product, revision or upgrade.
     

12.2.1 Notwithstanding the foregoing, Digital may issue no charge Purchase
       Orders for all Software that is provided by Seller generally to Customers
       at no cost. Such Software shall be provided to Digital in such quantities
       as requested by Digital, on a royalty-free basis. Seller may, at Seller's
       option, provide Digital with an electronic master copy to make copies for
       Digital's internal use.

12.3   Seller hereby grants to Digital and its Authorized Warranty Service
       Providers a royalty free, non-exclusive, worldwide license, until the
       expiration of the last Digital Services Agreement, to use and distribute,
       and to provide Customers, both directly and indirectly, electronic access
       to all data and information contained in Seller's Product Information
       database (excluding company confidential information and documents and
       training materials which Seller markets for profit) for the purpose of
       providing support to Customers.

13.3   Seller shall make available for use by Digital and Digital's Authorized
       Warranty Service Providers service tools (including diagnostic software
       and hardware, hardware tools and associated documentation) to assist
       Digital and Digital's Authorized Warranty Service Providers in performing
       Services hereunder. The types, quantities and deployment of such service
       tools will be mutually determined by the parties. The proprietary service
       tools shall remain the exclusive property of Seller, and shall be
       returned to Seller upon expiration or termination of this Agreement.

21.1   The manufacturer of a Digital-Branded Product shall bear all costs
       associated with the one year manufacturer's warranty. The manufacturer of
       a

                                      -7-
<PAGE>
 
       Seller Product shall bear all costs associated with the standard
       manufacturer's warranty for such Seller Product.
    
21.3   Seller warrants that all Digital-Branded Products sold by Seller to
       Digital under the terms of this Agreement will be free from defects in
       workmanship and materials under normal use and service for (i) one year
       for hardware and Software and (ii) ninety (90) days for floppy discs and
       magnetic media. All Warranty claims for Digital-Branded Products must
       comply with the terms of the Warranty set forth on Schedule 8.10. The
       manufacturer of a Digital-Branded Product, whether Digital or Seller, as
       the case may be, shall be responsible for all Digital-Branded Product
       repairs during the warranty period. Seller shall be responsible for all
       Seller Product repairs during the applicable standard manufacturer's
       warranty period.       

21.4   Seller warrants that (i) Software contained in Digital-Branded Products
       provided hereunder will perform in substantial conformance to the program
       specifications therefor during its one-year warranty period; (ii)
       Software contained in Seller Products provided hereunder will perform in
       substantial conformance to the program specifications therefor during its
       applicable standard manufacturer's warranty period; (iii) that all
       defects in Software, whether contained in Digital-Branded or Seller
       Products, identified during the applicable warranty period will be
       corrected; (iv) that all Software is Year 2000 Compliant; and (v) that
       the magnetic media containing Software will not fail during the first
       ninety (90) days.

21.5   The Warranty for Digital-Branded Products shall be as set forth on the
       Warranty Schedule attached hereto, Schedule 8.10. The parties shall
       mutually agree on all additions to, deletions from or changes to the
       Schedule. Prior to shipment of any Digital-Branded Products, Seller shall
       incorporate the Warranty set forth on Schedule 8.10 into its Digital-
       Branded Products literature, documentation and corresponding Warranty
       registration cards or forms.

21.7.1 In the event that Seller evaluates and determines that there is NPF in
       greater than ten percent (10%) of the Products or parts returned in a six
       (6) month period, Seller reserves the right to charge Digital for each
       returned unit determined to be NPF thereafter, the lesser of (i) $150 or
       (ii) twenty-five percent (25%) of the purchase price.

                                      -8-
<PAGE>
 
21.7.2 [Section renumbered as 21.7.1]

(Insert as new section)
21.8   [Text of former 21.7.1]


(Insert as new section)

21.11  Digital's exclusive remedies for breach of any warranties set forth in
       this Section 21 are (at Seller's option) (i) repair or replacement of the
       applicable Product or a refund of the purchase price; or (ii) the
       provision of conforming services. Seller shall not be liable for any
       costs or other expenses incurred by Digital in connection with such
       breach.

22.1.1 [ * ]



* Confidential Treatment

                                      -9-
<PAGE>
 
Except as amended hereby, the Reseller Agreement remains in full force and
effect.

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


DIGITAL EQUIPMENT CORPORATION         SELLER



/s/ Chris Sullivan                    /s/ David J. Kirkpatrick
- --------------------------------      --------------------------------------
Authorized Signature                  Authorized Signature

                                      David J. Kirkpatrick       
Chris Sullivan                        Senior Vice President and 
Vice President, Finance               Chief Financial Officer    
- --------------------------------      --------------------------------------
Name and Title                        Name and Title


February 7, 1998                      February 7, 1998
- --------------------------------      --------------------------------------
Date                                  Date

                                      -10-
<PAGE>
 
                            CABLETRON SYSTEMS, INC.
                            SCHEDULES AND EXHIBITS
                                     INDEX
 
Schedule 3.1     --   Appendix 1 - Product Road Map
 
Schedule 6.1.1   --   Quality Assurance Guidelines for Software
 
Schedule 9.1.1   --   Trademark License and Quality Requirements
 
     Appendix 1  --   The Digital Brand
 
     Appendix 2  --   DEC Formative Marks
 
     Appendix 3  --   Digital Logo Reproduction Requirements
 
     Appendix 5  --   Digital Brand Usage Requirements
 
     Appendix 6  --   Usage Criteria for DEC Formative Marks
 
     Appendix 7  --   Relationship Logo Usage Requirements
 
Schedule 9.6     --   Seller Products to be Digital-Branded
 
Schedule 9.8     --   Standards for Use of the Digital Marks
 
Schedule 9.9.5   --   Sample Business Card

                                      -11-

<PAGE>

                                                                      Exhibit 23

                      CONSENT OF INDEPENDENT ACCOUNTANTS



          We consent to the incorporation by reference in the registration 
statements of Cabletron Systems, Inc. ("Cabletron") on Forms S-8 (File No. 33-
31572 as filed on October 13, 1989, 33-42490 as filed on August 29, 1991, 33-
50454 as filed on August 4, 1992, 33-96058 as filed on August 18, 1995, 333-
09029 as filed on July 26, 1996, 333-09403 as filed on August 1, 1996 and as
amended November 11, 1996, 333-17557 as filed on December 12, 1996 and 333-21391
as filed on February 7, 1997) of our report, which includes an explanatory
paragraph, dated February 19, 1998, on our audit of the Statement of Assets Sold
and Statement of Revenue and Direct Operating Expenses (the "Statements") of the
Network Products Business of Digital Equipment Corporation (the "Business"),
which report is included in the current report on Form 8-K/A. The explanatory
paragraph states that the Statements were prepared to present the assets sold by
the Business to Cabletron and the revenue and direct operating expenses of the
Business and are not intended to be a complete presentation of the Business'
financial position or results of operations.



                                                      COOPERS & LYBRAND L.L.P.


Boston, Massachusetts
March 3, 1998


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