BLUE WAVE SYSTEMS INC
10-Q, 1999-02-16
ELECTRONIC COMPUTERS
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<PAGE>
 
                     SECURITIES  AND  EXCHANGE  COMMISSION
                           Washington, D. C.  20549
                                     ----
                                        
                                        
                                   FORM 10-Q


               QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                    OF THE SECURITIES EXCHANGE ACT OF 1934


For the quarter ended December 31, 1998          Commission File Number  0-26858

 
                            BLUE WAVE SYSTEMS INC.
            (Exact name of registrant as specified in its charter)

                                        
         Delaware                                               41-1425902
(State or other jurisdiction of                               (IRS Employer
incorporation or organization)                              Identification No.)



       2410 Luna Road                                             75006
       Carrollton,  Texas                                       (Zip Code)
(Address of principal executive offices)


                                (972) 277-4600
                        (Registrant's telephone number)


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

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

                                                   Outstanding at
              Class                               February 12,1999
              -----                               ---------------- 

Common Stock, par value $0.01 per share              13,141,980
 
<PAGE>
 
                            Blue Wave Systems Inc.
                                        
                                   Form 10-Q
                    For the Quarter Ended December 31, 1998

                                     INDEX

                                                                       Page No.
                                                                       --------
PART I.  FINANCIAL  INFORMATION

Item 1.     Consolidated Financial Statements
 
            Balance Sheets
            December 31, 1998 and June 30, 1998                            3
 
            Statements of Operations for the three 
            and the six months ended December 31, 1998 and 1997            4
 
            Statements of Cash Flows
            for the six months ended December 31, 1998 and 1997            5
 
            Notes to Interim Consolidated Financial Statements           6-10
 
Item 2.     Management's Discussion and Analysis of
            Financial Condition and Results of Operations               11-15
 
PART II. OTHER INFORMATION
 
Item 4.     Submission of Matters to a Vote of Security Holders           16
 
Item 6.     Exhibits and Reports on Form 8-K                              16
 
SIGNATURE                                                                 17

                                       2
<PAGE>
 
                             Blue Wave Systems Inc
 
                                Balance Sheets
                  (in thousands, except par value per share)
<TABLE> 
<CAPTION> 
                                                                                                 December 31,     June 30,
                                                                                                     1998           1998
                                                                                                 -----------    -----------
                                                                                                 (unaudited)
<S>                                                                                              <C>            <C>
                                               ASSETS
                                               ------
Current assets:
    Cash and cash equivalents                                                                    $     1,717    $     1,060
    Restricted cash                                                                                      831            835
    Marketable securities, at fair value                                                                 224          3,062
    Accounts receivable, net of allowances of $214 and $336, respectively                              7,033          4,975
    Inventories, net                                                                                   3,760          4,156
    Prepaid expenses and other                                                                           480            612
    Deferred tax asset                                                                                   903            903
                                                                                                 -----------    -----------
                         Total current assets                                                         14,948         15,603
                                                                                                 -----------    -----------
 
Plant and equipment:
    Machinery and equipment                                                                            6,851          7,320
    Furniture and fixtures                                                                             3,437          2,876
                                                                                                 -----------    -----------
                                                                                                      10,288         10,196
    Less accumulated depreciation                                                                     (6,468)        (5,838)
                                                                                                 -----------    -----------
                         Plant and equipment, net                                                      3,820          4,358
                                                                                                 -----------    -----------
 
Deferred tax asset-noncurrent                                                                            477            478
                                                                                                                   
Other assets                                                                                              94            105
                                                                                                 -----------    -----------
                         Total assets                                                            $    19,339    $    20,544
                                                                                                 ===========    ===========
 
                            LIABILITIES AND STOCKHOLDERS' EQUITY
                            ------------------------------------ 
Current liabilities:
    Accounts payable                                                                             $     3,306    $     2,402
    Accrued compensation                                                                                 225            706
    Other current liabilities                                                                          2,548          3,625
    Line of credit                                                                                     2,527          2,302
                                                                                                 -----------    -----------
                         Total current liabilities                                                     8,606          9,035
                                                                                                 -----------    -----------
 
Deferred income taxes                                                                                    866            870
Noncurrent liabilities - other                                                                           270            366
Long-term debt                                                                                           837            835
                                                                                                 -----------    -----------
                         Total liabilities                                                            10,579         11,106
                                                                                                 -----------    -----------
 
 
Stockholders' equity:
    Preference stock, $.01 par value; 1,000 shares authorized; no shares            
          issued and outstanding at December 31 and June 30, 1998                                        -              -
    Common stock, $.01 par value; 50,000 shares authorized; 13,560 and 13,537       
          shares issued; 12,815 and 12,791 shares outstanding, at December 31 and   
          June 30, 1998, respectively                                                                    136            135  
    Additional paid-in capital                                                                        23,023         22,973
    Net unrealized gain on marketable securities                                                         -              -
    Retained earnings                                                                                (12,949)       (12,208)
    Cumulative translation adjustment                                                                    (49)           (61)
                                                                                                 -----------    -----------
                                                                                                      10,161         10,839
                                                                                                 -----------    -----------
    Less -- treasury stock, at cost                                                                   (1,401)        (1,401)
                                                                                                 -----------    -----------
                         Total stockholders' equity                                                    8,760          9,438
                                                                                                 -----------    -----------
                         Total liabilities and stockholders' equity                              $    19,339   $     20,544
                                                                                                 ===========    ===========
</TABLE>
                                                                                

       The accompanying notes are an integral part of these consolidated
                             financial statements.

                                       3
<PAGE>
 
                            Blue Wave Systems Inc.
 
                           Statements of Operations
                   (in thousands, except per share amounts)
                                  (unaudited)

<TABLE> 
<CAPTION>
     Three Months Ended                                                                              Six Months Ended     
        December 31,                                                                                    December 31,      
     1998          1997                                                                              1998          1997   
  ----------    ----------                                                                        ----------    ----------
  <C>           <C>                   <S>                                                         <C>           <C>        
  $    7,797    $    7,371            Net sales                                                   $   14,603    $   17,657
       3,501         3,479            Cost of sales                                                    6,728         7,761
  ----------    ----------                                                                        ----------    ----------
       4,296         3,892                        Gross margin                                         7,875         9,896
                                                                                                                          
                                      Operating expenses:                                                                 
       1,401         1,793              Product development and engineering                            2,856         3,625
       2,068         2,079              Sales and marketing                                            4,127         4,059
         760         1,104              General and administrative                                     1,585         2,267
  ----------    ----------                                                                        ----------    ----------
       4,229         4,976                        Total operating expenses                             8,568         9,951
  ----------    ----------                                                                        ----------    ----------
                                                                                                                          
          67        (1,084)           Operating income (loss)                                           (693)          (55)
  ----------    ----------                                                                        ----------    ----------
                                                                                                                          
                                      Other income (expense):                                                             
          22           144              Interest income                                                   68           292
         (62)          (43)             Interest expense                                                (122)          (30)
          21            51              Other income                                                      41            70
  ----------    ----------                                                                        ----------    ----------
         (19)          152                        Total other income (expense)                           (13)          332
  ----------    ----------                                                                        ----------    ----------
                                                                                                                          
                                      Income (loss) from continuing operations before                                     
          48          (932)                       provision (benefit) for income taxes                  (706)          277
                                                                                                                          
          12          (234)           Provision (benefit) for income taxes                                35           (41)
  ----------    ----------                                                                        ----------    ----------
          36          (698)           Income (loss) from continuing operations                          (741)          318
                                                                                                                          
                                      Loss from discontinued operations (first quarter of                                 
         -             -                          fiscal 1998), net of tax benefit of $62                  -          (137)
  ----------    ----------                                                                        ----------    ----------
          36          (698)           Net income (loss)                                                 (741)          181
  ----------    ----------                                                                        ----------    ----------
                                                                                                                          
                                      Preference share dividends, accretion and amortization                              
         -            (468)                       of issuance costs of preference shares                   -          (905)
  ----------    ----------                                                                        ----------    ----------
  $       36    $   (1,166)           Net income (loss) applicable to common stock                $     (741)   $     (724)
  ==========    ==========                                                                        ==========    ==========
                                                                                                                          
                                      Basic net income (loss) per share:                                                 
  $     0.00    $    (0.11)               Continuing operations                                   $    (0.06)   $    (0.06)
        -             -                   Discontinued operations                                          -         (0.01)
  ----------    ----------                                                                        ----------    ----------
  $     0.00    $    (0.11)                                                                       $    (0.06)   $    (0.07)
  ==========    ==========                                                                        ==========    ==========
                                                                                                                          
                                      Diluted net income (loss) per share:                                                
  $     0.00    $    (0.11)               Continuing operations                                   $    (0.06)   $    (0.06)
        -             -                   Discontinued operations                                          -         (0.01)
  ----------    ----------                                                                        ----------    ----------
  $     0.00    $    (0.11)                                                                       $    (0.06)   $    (0.07)
  ==========    ==========                                                                        ==========    ==========
                                                                                                                          
                                                                                                                          
                                      Weighted average common shares outstanding:                                         
      13,028        10,592                Basic                                                       13,021        10,479
  ==========    ==========                                                                        ==========    ==========
      13,669        10,592                Diluted                                                     13,021        10,479 
  ==========    ==========                                                                        ==========    ==========
</TABLE>


       The accompanying notes are an integral part of these consolidated
                             financial statements.

                                       4
<PAGE>
 
                            Blue Wave Systems Inc.
 
                           Statements of Cash Flows
                                (in thousands)
                                  (unaudited)

<TABLE> 
<CAPTION> 
                                                                                     Six Months Ended
                                                                                        December 31,
                                                                                     1998          1997
                                                                                  ----------    ----------
<S>                                                                               <C>           <C> 
CASH FLOWS FROM OPERATING ACTIVITIES:                                                           
  Net income (loss)                                                               $     (741)   $      181 
  Adjustments to reconcile net income to net cash                                                          
    provided (used) by operating activities -                                                              
       Depreciation                                                                      716           627 
  Changes in assets and liabilities -                                                                      
       Accounts receivable, net                                                       (2,058)        2,289 
       Inventories, net                                                                  396          (915)
       Prepaid expenses and other                                                        143          (955)
       Accounts payable and accrued liabilities                                         (602)       (1,466)
                                                                                  ----------    ----------
              Net cash used by operating activities                                   (2,146)         (239) 
                                                                                  ----------    ----------
 
CASH FLOWS FROM INVESTING ACTIVITIES:
       Purchases of machinery, equipment, furniture and fixtures                        (364)         (493)
       Proceeds from dispositions of fixed assets held for sale                           34           -
       Purchases of marketable securities                                                -             -
       Proceeds from maturities of marketable securities                               2,838         2,095
                                                                                  ----------    ----------
              Net cash provided by investing activities                                2,508         1,602
                                                                                  ----------    ----------
                                                                                                
CASH FLOWS FROM FINANCING ACTIVITIES:                                                           
       Exercise of stock warrants and options                                             50           590
       Purchase of treasury stock                                                        -            (573)
       Proceeds from debt borrowings                                                     225           417
       Net payments on capital lease obligations                                         -            (114)
                                                                                  ----------    ----------
              Net cash provided by financing activities                                  275           320
                                                                                  ----------    ----------
                                                                                                
       Effect of translation rates on cash                                                20           137
       Net decrease in cash attributable to overlapping period                           -            (562)
                                                                                                
NET INCREASE IN CASH AND CASH EQUIVALENTS                                                657         1,258
CASH AND CASH EQUIVALENTS, beginning of period                                         1,060         2,406
                                                                                  ----------    ----------
CASH AND CASH EQUIVALENTS, end of period                                          $    1,717    $    3,664
                                                                                  ==========    ==========
                                                                                                
SUPPLEMENTAL CASH FLOW DISCLOSURES:                                                             
       Cash paid for income taxes                                                 $      -      $      592
       Cash paid for interest                                                            120            63
</TABLE>

       The accompanying notes are an integral part of these consolidated
                             financial statements.

                                       5
<PAGE>
 
                             Blue Wave Systems Inc.
                                        
               Notes to Interim Consolidated Financial Statements


1.   Basis of Presentation

     While the accompanying interim consolidated financial statements are
unaudited, they have been prepared by the Company pursuant to the rules and
regulations of the Securities and Exchange Commission.  In the opinion of the
Company, all material adjustments and disclosures necessary to fairly present
the results of such periods have been made.  Certain information and footnote
disclosures normally included in financial statements prepared in accordance
with generally accepted accounting principles have been condensed or omitted
pursuant to the rules and regulations of the Securities and Exchange Commission.
These consolidated financial statements should be read in conjunction with the
consolidated financial statements and notes thereto for the year ended June 30,
1998, as included in the Form 10-K, as amended, previously filed.  Certain
previously reported amounts have been reclassified to conform with the current
year presentation.  The interim results of operations for the period ended
December 31, 1998, are not necessarily indicative of results to be expected for
the year ending June 30, 1999.

     The accompanying consolidated financial statements for periods presented
for fiscal year 1998 have been prepared to give retroactive effect to the
combination with Loughborough Sound Images Limited ("Sub" or "LSI") on April 27,
1998, which has been accounted for as a pooling of interests. The accompanying
restated consolidated statements of operations and cash flows for the three and
the six months ended December 31, 1997, combine Blue Wave's historical
statements of operations and cash flows with the corresponding Sub historical
statements of operations and cash flows for the same time period.

     The table below presents a reconciliation of revenues and net income (loss)
for the three and the six months ended December 31, 1997, as reported in the
consolidated statements of operations with those previously reported by the
Company.  The references to Blue Wave in this table are to the Company's
historical operating results prior to the acquisition of Sub (in thousands):

<TABLE>
<CAPTION>
                                            Three months ended         Six months ended
                                             December 31, 1997        December 31, 1997
                                            -----------------         -----------------
<S>                                         <C>                      <C>
REVENUES:
Blue Wave                                         $ 2,528                   $ 5,731
Sub                                                 4,843                    11,926
                                                  -------                   -------
        Total consolidated revenue                $ 7,371                   $17,657
                                                  =======                   =======
 
NET INCOME (LOSS):
Blue Wave                                         $  (198)                  $   117
Sub                                                  (968)                     (841)
                                                  -------                   -------
        Total consolidated net loss               $(1,166)                  $  (724)
                                                  =======                   =======
</TABLE>
                                                                                
     Included in the net income of Sub for the first fiscal quarter of 1998
was a loss from discontinued operations of $137,000, which was net of an income
tax benefit of $62,000.


2.   Marketable Securities

     The Company has determined that all of its marketable securities should be
classified as available for sale and reflected in the accompanying balance sheet
at their respective market values.  The Company's results of operations include
earnings from such securities as calculated on a yield-to-maturity basis.
Unrealized gains and losses from the changes in fair value are excluded from
income and are reported as an adjustment to stockholders' equity, net of the
deferred tax effect.  The Company's marketable securities consist of direct and
implied obligations of the U. S. Government and investment grade corporate debt
securities.

  The Company does not invest in or use derivative financial instruments other
than currency hedging transactions.  The Company did not enter into any hedging
transactions during the periods presented.

                                       6
<PAGE>
 
                             Blue Wave Systems Inc.
                                        
               Notes to Interim Consolidated Financial Statements


3.   Inventories

     Inventories at December 31 and June 30, 1998, consisted of the following
(in thousands):
 
<TABLE>
<CAPTION>
                                     December 31, 1998         June 30, 1998
                                     -----------------         -------------
<S>                                  <C>                       <C>
Raw materials                           $ 2,162                   $ 1,908
Work-in-process                           1,807                     1,969
Finished goods                            1,484                     1,893
Reserves                                 (1,693)                   (1,614)
                                        -------                   -------
Inventories, net                        $ 3,760                   $ 4,156
                                        =======                   =======
</TABLE>
                                                                                

4.   Debt

Lines of Credit

     In order to fund current operations and the payment of merger related
expenses the Company has in place credit facilities with a commercial bank in
the United Kingdom and a commercial bank in the United States. Following is a
description of these credit facilities:

     Facility with U.S. Bank--In December 1998, the Company entered into a
$2,500,000 revolving line of credit agreement with a commercial bank (U.S.
Agreement) which expires December 31, 1999.  Loans made pursuant to the U.S.
Agreement are secured by all assets in the United States and bear interest at
varying rates, as defined. The current rate for borrowings is prime plus 1%.
Borrowings are limited to a lending formula which is based on eligible trade
accounts receivable, as defined.  In January 1999 the Company made an initial
draw of $625,000 under the agreement.  The U.S. Agreement contains a number of
covenants including the maintenance of certain financial ratios and the
prohibition of certain transactions, as defined.  The Company believes it is in
compliance with all of the covenants of the U. S. Agreement.  The failure of the
Company to meet each covenant could be considered an event of default which
would enable the lender to demand immediate acceleration of the loan.

     Facility with U.K. Bank--In December 1998, the Company finalized a renewal
agreement for (Pounds)1,000,000 (approximately $1,660,000) with a commercial
bank (U.K. Renewal Agreement) which is due upon demand.  Loans made pursuant to
the U.K. Renewal Agreement are secured by all assets in the United Kingdom and
bear interest at the bank's base rate plus 1.75%.  At December 31, 1998 the
balance outstanding was (Pounds)1,520,000 (approximately $2.5 million).  This
amount exceeded the (Pounds)1,000,000 face amount of the U.K. Renewal Agreement.
Pursuant to the U.K. Renewal Agreement this condition was permissible up through
January 10, 1999 at which time the amount outstanding could not exceed the
lesser of (Pounds)1,000,000 and the lending formula, as defined.  This condition
was met at January 10, 1999.   The lending formula is calculated based on
eligible accounts receivable and inventory, as defined.

Long-term Debt

     In connection with the establishment of an employee stock ownership plan
("ESOP"), the Company has guaranteed the debt of the ESOP. The guarantee
required the Company to place cash in escrow in an amount equal to the debt.
Such cash has been reflected as restricted cash in the accompanying consolidated
financial statements.  The guarantee is reflected as long-term debt in the
accompanying consolidated financial statements.  This debt consists of a note
payable to a commercial bank with interest at the bank's base rate plus 1.50%
(7.50% at December 31, 1998).   The note is payable in 2002.  The debt
agreements related to this note contain warranties and covenants and require
maintenance of certain financial ratios.  Default on any warranty or covenant
could, if not waived or corrected, accelerate the maturity of any borrowings
outstanding.  Management believes the Company is in compliance with such
warranties and covenants.

                                       7
<PAGE>
 
                             Blue Wave Systems Inc.
                                        
               Notes to Interim Consolidated Financial Statements


5.   Income Taxes
 
     At fiscal year-end 1998, Blue Wave had federal and foreign net operating 
loss (NOL) carryforwards of approximately $8,300,000 and $2,000,000,
respectively, which begin to expire in 2002. Research and development tax credit
carryforwards of approximately $41,000 at fiscal year end 1998, were also
available to reduce future federal income taxes. Pursuant to Section 382 of the
Internal Revenue Code, a change in ownership occurred with the initial public
offering of Blue Wave in 1995. As a result, Blue Wave was subject to a
$2,300,000 annual net operating loss utilization limitation. A change in
ownership pursuant to Section 382 also occurred with the combination. As a
result, Blue Wave will be subject to a $1,373,000 annual net federal operating
loss utilization limitation.

     Blue Wave had net deferred tax assets of approximately $510,000 at fiscal
year end 1998 and December 31, 1998, which is reflected in the accompanying
balance sheets. These deferred tax assets are reflected net of a valuation
allowance. In accordance with the criteria contained in SFAS No. 109,
"Accounting for Income Taxes," the Company has recorded a valuation allowance
against a portion of its total NOL. Blue Wave believes it is more likely than
not that it will be able to realize the benefit of this net deferred tax asset.
Among the factors the Company considers when making this evaluation are the (1)
potential changes in operations which management believes will expand its
product capabilities and customer base, (2) cost reduction or synergies to be
gained from the combination of Mizar and LSI, (3) the realignment of the Company
including its strategy to expand its markets in the telecommunications industry,
(4) the introduction of systems based upon new DSP microprocessors, (5)
limitation of the net operating loss carryforwards, as described above, related
to the LSI merger, (6) and projections of sufficient taxable US income to fully
realize the net realized deferred tax asset by the end of calendar year 2000.
Management continually evaluates the realizability of the net deferred tax
assets and the need for a valuation allowance on such assets.


6.   Income (Loss) Per Share

     Basic net income per share for the three months ended December 31, 1998,
was computed by dividing net income by the weighted average number of shares of
common stock outstanding during the period. Diluted net income per share for the
three months ended December 31, 1998, was computed by dividing net income by the
weighted average number of shares of common stock and other potentially dilutive
securities outstanding during the period. Dilutive securities included in
diluted net income per share are stock options calculated under the treasury
stock method using the prevailing average market price for the period presented.
Options for 473,063 underlying shares were not included in calculating diluted
net income per share for the three months ended December 31, 1998, because these
options would have been anti-dilutive. Basic and diluted net loss per share for
the six months ended December 31, 1998 was computed by dividing net loss by the
weighted average number of shares of common stock outstanding during the period.
Basic and diluted net loss per share for the three and the six months ended
December 31, 1997 were computed by dividing net loss by the weighted average
number of shares of common stock outstanding during the period, as adjusted, on
a historical basis, for the exchange ratio applied in the combination. Other
dilutive securities outstanding during these periods were anti-dilutive to the
net loss per share, and were not used to calculate diluted loss per share.
Shares used in basic and diluted net income (loss) per share calculations are
presented below (in thousands):

<TABLE>
<CAPTION>
                                                                  Three Months Ended           Six Months Ended
                                                                     December 31,                December 31,
                                                                  1998          1997         1998          1997
                                                               ----------   -----------   ----------    ----------
<S>                                                           <C>           <C>           <C>           <C>
Basic:
- ------
Weighted average common stock outstanding
        during the period                                         13,028      10,592        13,021        10,479
                                                                  ======      ======        ======        ======
 
Diluted:
- --------
Weighted average common stock outstanding
        during the period                                         13,028      10,592        13,021        10,479
Other dilutive securities of stock option/warrant programs           641         N/A           N/A           N/A
                                                                  ------      ------        ------        ------
Shares used in calculation of diluted income (loss) per share     13,669      10,592        13,021        10,479
                                                                  ======      ======        ======        ======
</TABLE>

                                       8
<PAGE>
 
                             Blue Wave Systems Inc.
                                        
               Notes to Interim Consolidated Financial Statements


     Dilutive securities equivalent to approximately 550,000, 2,294,000, and
2,304,000 shares of common stock were outstanding during the six months ended
December 31, 1998 and the three and the six months ended December 31, 1997,
respectively, but were not included in the computation of diluted EPS because
the Company incurred a net loss.  The inclusion of these options would have been
anti-dilutive to diluted EPS.  Stock options scheduled to expire within the five
years following December 31, 1998, aggregate 608,201 underlying shares,
exercisable for a total of $226,460, and begin to expire in 1999.  Additional
disclosures regarding the stock option plan activity during the past three
fiscal years is disclosed in Note 13 to the consolidated financial statements in
the Company's Form 10-K for the year ended June 30, 1998.


7.   Comprehensive Income

     The Company has adopted SFAS No. 130, Reporting Comprehensive Income, in
fiscal 1999.  SFAS No. 130 establishes standards for reporting and display of
comprehensive income and its components in a full set of general-purpose
financial statements.  Comprehensive income is defined as the total of net
income (loss) and all other non-owner changes in equity.   The Company currently
has two types of non-owner changes in equity, excluding net income (loss),
including foreign currency translation gains and losses and unrealized gains and
losses on investments.  The computation of comprehensive income (loss) for the
three and the six months ended December 31, 1998 and 1997 follows (in
thousands):

<TABLE>
<CAPTION>
                                                          Three Months Ended              Six Months Ended
                                                             December 31,                   December 31,
                                                          1998           1997           1998           1997
                                                       ----------    ----------      ----------     ----------
<S>                                                  <C>             <C>             <C>            <C>
Net income (loss)                                         $  36       $(1,166)         $(741)         $(724)
Foreign currency translation adjustment                     (96)          168             12            168
Net unrealized gain (loss) on marketable securities          (2)            2             --             13
                                                          -----       -------          -----          -----
Total comprehensive income (loss)                         $ (62)      $  (996)         $(729)         $(543)
                                                          =====       =======          =====          =====
</TABLE>
                                                                                
8.   Recently Issued Accounting Pronouncements

     The Company has adopted SFAS No. 131, Disclosure about Segments of An
Enterprise and Related Information, in fiscal 1999.  This pronouncement changes
requirements under which public businesses must report segment information.  The
objective of the pronouncement is to provide information about a company's
different types of business activities and different economic environments.
SFAS No. 131 requires companies to select segments based on their internal
reporting system. The adoption of SFAS No. 131 is required for fiscal years
beginning after December 15, 1997, however application is not required for
interim periods in the initial year of its application.  The Company is
currently evaluating the impact that the adoption of SFAS 131 will have on the
Company's financial statement disclosures.

     The Company has adopted SFAS No. 132, Employers' Disclosures about Pensions
and Other Postretirement Benefits, in fiscal 1999.  This pronouncement revises
employers' disclosures about pension and other postretirement benefit plans.  It
does not change the measurement or recognition of those plans, however, it does
require additional information on changes in the benefit obligations and fair
values of plan assets in order to facilitate financial analysis.  The adoption
of SFAS No. 132 is required for fiscal years beginning after December 15, 1997.
The Company currently does not have any pension or postretirement benefit plans.
 
     The Financial Accounting Standards Board has issued SFAS No. 133,
Accounting for Derivative and Similar Financial Instruments For Hedging
Activities. This pronouncement revises the accounting for derivative financial
instruments. It requires entities to recognize all derivatives as either assets
or liabilities in the balance sheet and measure those instruments at fair value.
The adoption of this statement is required for all quarters of fiscal years
beginning after June 15, 1999. Historically, the Company has not invested in
derivatives nor hedged any significant risks with the use of derivative
financial instruments.
                                       9
<PAGE>

     The Financial Accounting Standards Board has issued SFAS No. 134,
Accounting for Mortgaged-Backed Securities Retained After the Securitization of
Mortgage Loans Held for Sale by a Mortgage Banking Enterprise. The Company is
not a mortgage banking enterprise, thus this statement will not impact the
Company's financial condition or results of operations.

9.   Stockholders' Equity

Common Stock

     During 1997, the Company announced plans to repurchase up to $2,000,000
worth of its common stock outstanding. Through September 30, 1997, a total of
281,900 shares had been repurchased at a total cost of $1,081,000. In the second
quarter of fiscal 1998, the Board of Directors canceled the stock repurchase
plan.

Preferred Stock

     On April 10, 1997, Sub entered into an agreement with Boston Holdings
Limited ("BHL"), a subsidiary of BancBoston Capital Limited, to sell to BHL at a
subscription price of (Pounds)5,500,000 (approximately $8,914,000), 5,500,000
preference shares, one "B" ordinary share, and warrants to acquire an additional
20,115 "B" ordinary shares. Under the terms of Sub's Articles of Association,
any proceeds resulting from the exercises of the warrants was to be used to
redeem the preference shares. Contemporaneously with the combination, this
warrant was exercised for (Pounds)3,318,975 (or approximately $5,571,000) and
was converted into 1,903,522 common shares of Blue Wave Systems.

     The preference shares and accrued dividends thereon ranked first in
liquidation priority over all other equity shares and accrued first preference
cumulative dividends of 6% per annum beginning on April 1, 1998, such dividends
being payable in cash biannually on March 31 and September 30.  The preference
shares also accrued a second preference cumulative dividend of 8% per annum
until March 31, 1998, and 2% per annum thereafter, and such dividends were paid
as one additional preference share for each pound sterling in dividends due on
March 31 and September 30.  Dividends accrued between March 31, 1998 and the
date of redemption were paid in cash.

                                       10
<PAGE>
 
          Management's Discussion and Analysis of Financial Condition
                           and Results of Operations


     The consolidated financial statements for periods presented for fiscal year
1998 have been prepared to give retroactive effect to the combination with
Loughborough Sound Images Limited ("Sub" or "LSI") on April 27, 1998, which has
been accounted for as a pooling of interests. The restated consolidated
statements of operations and cash flows for the three and the six months ended
December 31, 1997, combine Blue Wave's historical statements of operations and
cash flows with the corresponding Sub historical statements of operations and
cash flows for the same time period.

     The following table expresses the Company's statements of operations as a
percentage of net sales.

<TABLE>
<CAPTION>
                                                              Three Months Ended             Six Months Ended
                                                                 December 31,                  December 31,
                                                             1998           1997           1998           1997
                                                         -------------  -------------  -------------  -------------
<S>                                                      <C>            <C>            <C>            <C>
Net sales                                                     100%           100%           100%           100%
Cost of sales                                                  45%            47%            46%            44%
                                                              ----           ----           ----           ----
          Gross margin                                         55%            53%            54%            56%
Operating expenses:
          Product development and engineering                  18%            25%            20%            20%
          Sales and marketing                                  26%            28%            28%            23%
          General and administrative                           10%            15%            11%            13%
                                                              ----           ----           ----           ----
Total operating expenses                                       54%            68%            59%            56%
                                                              ----           ----           ----           ----
Operating income (loss)                                         1%           -15%            -5%             0%
Total other income (expense)                                    0%             2%             0%             2%
                                                              ----           ----           ----           ----
Income (loss) from continuing operations
          before provision (benefit) for income taxes          1%           -13%            -5%             2%
Provision (benefit) for income taxes                           0%            -3%             0%             0%
                                                              ----           ----           ----           ----
Income (loss) from continuing operations                        1%           -10%            -5%             2%
Loss from discontinued operations, net of
          tax benefit                                           0%             0%             0%            -1%
                                                              ----           ----           ----           ----
Net income (loss)                                               1%           -10%            -5%             1%
                                                              ====           ====           ====           ====
</TABLE>
                                                                                
Results of operations for the three months ended December 31, 1998 compared to
three months ended December 31, 1997

     For the three months ended December 31, 1998 the Company reported net sales
of $7,797,000, as compared to $7,371,000 in the same period of the prior year.
The improvement in net sales is mainly attributable to two factors. Sales of the
Company's new ComstructTM product line for telecommunications applications were
approximately $500,000 during the second quarter of fiscal 1999. This is
inclusive of hardware product sales, a software license and engineering service
fees. The second factor effecting the comparison is the December 1997 net sales
amount was negatively impacted by component shortages and delays from a key
supplier of printed circuit boards. The Company's net sales during the past
several quarters have been significantly effected by recently introduced next
generation DSPs, including the C6000 family of DSPs offered by Texas Instruments
("TI"). The C6000 family represents a 10x improvement in performance over
existing DSPs. DSPs comprise a key portion of the technology content of the
Company's products and the majority of the Company's DSP-based revenues are
derived from products that incorporate TI DSPs. Market interest in recently
introduced products that utilize next generation DSPs has been at the expense of
the Company's existing products that incorporate previous generation DSPs. The
Company believes that its newer C6000-based products will be able to serve a
much larger market as new emerging applications utilize high-performance DSP-
based sub-systems and, leverage the Company's signal processing design
expertise. When TI introduced their C4x family of DSPs in 1992, the Company
experienced a similar revenue trend for existing products followed by a
significant increase in revenue as the C4x family of DSPs were incorporated into
new applications.

     A significant portion of the Company's sales are to prime contractors for
the federal government and are used in defense, aviation and intelligence
applications. The Company believes that the trend of the federal government is
to emphasize the purchase of commercial off-the-shelf (COTS) products versus
proprietary designs dedicated to a specific application and expects this trend
will have a positive impact on revenues in the future. More recently, the
Company has also experienced a significant increase in bookings for "ruggedized"
DSP-based products that are designed for harsh environments. The time lag
between order booking and revenue recognition associated with "ruggedized"
products can be

                                       11
<PAGE>
 
much longer due to engineering effort, component ordering and manufacturing
lead-times. Previously, a large portion of the Company's DSP business was modest
orders for relatively standard products. These products were used to prove a
concept or deploy a small number of prototypes or systems. Customer orders for
"ruggedized" products typically are quite large and result in a high degree of
variability in bookings during any given three month measurement period. The
customer order backlog was $11,920,000 at December 31, 1998, as compared to
$11,298,000 at June 30, 1998. Certain customer orders may be subject to
cancellation and/or revision and therefore backlog is not a guarantee of future
revenue.

     Gross margin percent for the three months ended December 31, 1998 was 55%,
as compared to 53% for the same period in the prior year. The improvement in
gross margin percentage is due to a reduction in functional spending for
operations, including a reduction in force, that was a part of the Company's
post-merger organization plan. The Company's historical gross margin percentage
has also varied by quarter in both a positive and negative fashion due to 
volume-related efficiencies, changes in product and customer mix and provisions
for manufacturing scrap and obsolescence.

     During the three months ended December 31, 1998 product development and
engineering expenses were $1,401,000, or 18% of net sales, compared to
$1,793,000, or 25% of net sales, during the same period in the prior year.  The
reduction in absolute spending is the result of the Company's focus on specific
vertical markets and certain cost benefits attributable to the post-merger
organization plan.

     During the three months ended December 31, 1998 sales and marketing
expenses were essentially flat. Certain cost benefits were realized as a result
of the post-merger organization plan, however, those savings have been invested
in technical sales support functions as well as marketing efforts for the new
Comstruct(TM) product line.

     During the three months ended December 31, 1998 general and administrative
expenses were $760,000, or 10% of net sales, as compared to $1,104,000, or 15%
of net sales, during the same period in the prior year.  The reduction in
absolute spending is the result of implementing the post-merger organization
plan and realizing other cost benefits as a result of the combination.

     During the three months ended December 31, 1998 total other income
(expense) declined to $(19,000), as compared to $152,000 during the same period
in the prior year. The change is due to both a decline in interest income and an
increase in interest expense associated with bank credit facilities. Total cash
consumed in conjunction with completing the merger and implementing the post-
merger organization plan was approximately $8 million during the 18 months ended
December 31, 1998. Operating losses, capital expenditures, and other items
consumed an additional $3.6 million in cash during the 18 months ended December
31, 1998.

     The Company reported net income of $36,000 for the three months ended
December 31, 1998 as compared to a net loss of $1,166,000 during the same period
in the prior year. The significant improvement in operating results is
attributable to the increase in net sales and significant operating expense
reductions created by implementing the post-merger organization plan.


Results of operations for the six months ended December 31, 1998 compared to six
months ended December 31, 1997

     For the six months ended December 31, 1998 the Company reported net sales
of $14,603,000, as compared to $17,657,000 in the same period of the prior year.
The Company's net sales during the past several quarters have been significantly
effected by recently introduced next generation DSPs, including the C6000 family
of DSPs offered by Texas Instruments ("TI"). The C6000 family represents a 10x
improvement in performance over existing DSPs. DSPs comprise a key portion of
the technology content of the Company's products and the majority of the
Company's DSP-based revenues are derived from products that incorporate TI DSPs.
Market interest in recently introduced products that utilize next generation
DSPs has been at the expense of the Company's existing products that incorporate
previous generation DSPs. The Company believes that its newer C6000-based
products will be able to serve a much larger market as new emerging applications
utilize high-performance DSP-based sub-systems and, leverage the Company's
signal processing design expertise. When TI introduced their C4x family of DSPs
in 1992, the Company experienced a similar revenue trend for existing products
followed by a significant increase in revenue as the C4x family of DSPs were
incorporated into new applications.

     Gross margin percent for the six months ended December 31, 1998 was 54%, as
compared to 56% for the same period in the prior year. The decline in gross
margin percentage is due to the high margin % reported in the September (first)
quarter of fiscal 1998. That quarter represented a record revenue level for the
Company and the associated fixed costs of manufacturing the Company's products
were spread over a much larger revenue base. Those fixed manufacturing costs
have recently been reduced as a result of implementing the post-merger
organization plan.

                                       12
<PAGE>
 
     During the six months ended December 31, 1998 product development and
engineering expenses were $2,856,000, or 20% of net sales, compared to
$3,625,000, or 20% of net sales, during the same period in the prior year.  The
reduction in absolute spending is the result of the Company's focus on specific
vertical markets and certain cost benefits attributable to the post-merger
organization plan.

     During the six months ended December 31, 1998 sales and marketing expenses
were essentially flat.  Certain cost benefits were realized as a result of the
post-merger organization plan, however, those savings have been invested in
technical sales support functions as well as marketing efforts for the new
Comstruct(TM) product line.

     During the six months ended December 31, 1998 general and administrative
expenses were $1,585,000, or 11% of net sales, as compared to $2,267,000, or 13%
of net sales during the same period in the prior year. The reduction in absolute
spending is the result of implementing the post-merger organization plan and
realizing other cost benefits as a result of the combination.

     During the six months ended December 31, 1998 total other income (expense)
declined to $(13,000), as compared to $332,000 during the same period in the
prior year.  The change is due to both a decline in interest income and an
increase in interest expense associated with bank credit facilities.  Total cash
consumed in conjunction with completing the merger and implementing the post-
merger organization plan was approximately $8 million during the 18 months ended
December 31, 1998.  Operating losses, capital expenditures, and other items
consumed an additional $3.6 million in cash during the 18 months ended December
31, 1998.
 
     The Company reported a net loss of $741,000 for the six months ended
December 31, 1998 as compared to a net loss of $724,000 during the same period
in the prior year. The loss is attributable to the 17% decline in net sales
somewhat offset by significant operating expense reductions created by
implementing the post-merger organization plan.


Liquidity and Capital Resources

     The Company's total cash, cash equivalents and purchased marketable
securities were $2,772,000 at December 31, 1998, as compared to $4,957,000 at
June 30, 1998. Net working capital at December 31, 1998, was $6,342,000, as
compared to $6,568,000 at June 30, 1998, a decrease of $226,000. Accounts
receivable at December 31, 1998 increased significantly over the June 30, 1998
balance primarily due to the timing of shipments during the quarter and an
increase in total shipments during the quarter.

     Expenditures for capital equipment were $364,000 for the six months ended
December 31, 1998, as compared to $493,000 in the prior year.

     During the six months ended December 31, 1998 the Company has consumed cash
approximating $2.1 million and increased its short-term bank borrowings by
approximately $200,000. The cash consumption during this period is attributable
to the payment of merger related expenses of approximately $900,000 and a $2
million increase in accounts receivable due to the timing of shipments within
the quarter. In order to fund current operations and the payment of merger
related expenses the Company has in place credit facilities with a commercial
bank in the United Kingdom and a commercial bank in the United States. Following
is a description of these credit facilities:

     Facility with U.S. Bank--In December 1998, the Company entered into a
$2,500,000 revolving line of credit agreement with a commercial bank (U.S.
Agreement) which expires December 31, 1999.  Loans made pursuant to the U.S.
Agreement are secured by all assets in the United States and bear interest at
varying rates, as defined. The current rate for borrowings is prime plus 1%.
Borrowings are limited to a lending formula which is based on eligible trade
accounts receivable, as defined.  In January 1999 the Company made an initial
draw of $625,000 under the agreement.  The U.S. Agreement contains a number of
covenants including the maintenance of certain financial ratios and the
prohibition of certain transactions, as defined.  The Company believes it is in
compliance with all of the covenants of the U. S. Agreement.  The failure of the
Company to meet each covenant could be considered an event of default which
would enable the lender to demand immediate acceleration of the loan.  Such
acceleration, or any other significant negative change to the lending formula,
would have a material negative impact upon the Company's ability to fund its
1999 operating plan.

     Facility with U.K. Bank--In December 1998, the Company finalized a renewal
agreement for (Pounds)1,000,000 (approximately $1,660,000) with a commercial
bank (U.K. Renewal Agreement) which is due upon demand. Loans made

                                       13
<PAGE>
 
pursuant to the U.K. Renewal Agreement are secured by all assets in the United
Kingdom and bear interest at the bank's base rate plus 1.75%. At December 31,
1998 the balance outstanding was (Pounds)1,520,000 (approximately $2.5 million).
This amount exceeded the (Pounds)1,000,000 face amount of the U.K. Renewal
Agreement. Pursuant to the U.K. Renewal Agreement this condition was permissible
up through January 10, 1999 at which time the amount outstanding could not
exceed the lesser of (Pounds)1,000,000 and the lending formula, as defined. This
condition was met at January 10, 1999. The lending formula is calculated based
on eligible accounts receivable and inventory, as defined. Any significant
reduction in the borrowing capacity allowable under this agreement or
acceleration of amounts due would have a material negative impact upon the
Company's ability to fund its 1999 operating plan.

     In connection with the establishment of an employee stock ownership plan
("ESOP"), the Company has guaranteed the debt of the ESOP. The guarantee
required the Company to place cash in escrow in an amount equal to the debt.
Such cash has been reflected as restricted cash in the accompanying consolidated
financial statements.  The guarantee is reflected as long-term debt in the
accompanying consolidated financial statements.  This debt consists of a note
payable to a commercial bank with interest at the bank's base rate plus 1.50%
(7.50% at December 31, 1998).   The note is payable in 2002.  The debt
agreements related to this note contain warranties and covenants and require
maintenance of certain financial ratios.  Default on any warranty or covenant
could, if not waived or corrected, accelerate the maturity of any borrowings
outstanding.  Management believes the Company is in compliance with such
warranties and covenants.
 
     Management believes that through its cash resources and currently available
debt facilities it will have adequate resources to fund the Company's 1999
operating plan. The Company will, from time to time, evaluate potential
strategic transaction opportunities including acquisitions, joint ventures and
new product plans. In order to fund any of these initiatives the Company may
find it necessary to seek additional capital via either a debt or equity
offering.

Year 2000 Initiatives

     The Company has implemented a plan ("Y2K Plan") to attempt to assess and
mitigate the potential impact of the Year 2000 problem throughout the Company.
This problem can arise when time-sensitive embedded software utilizes a two
digit year date field, sorting years beginning in 2000 ("00") before the year
1999 ("99").  Improper sorting can result in data corruption and processing
errors.  This problem can be present in licensed software, software developed
for internal use, software developed for customer use, and technology equipment.
Additionally, Year 2000 problems resident with key business partners to the
Company must also be identified and addressed.

     The Company has completed a detailed assessment of its internal systems and
will have to replace portions of software used internally so that its computer
systems will function properly with respect to dates beginning in 2000, and
thereafter.  Year 2000 compliance questionnaires are being sent to key suppliers
and a monitoring process has been established to ensure the suppliers respond
and comply with the requirements. Compliance testing of a substantial portion of
the areas covered by the Company's Y2K Plan was completed by, and applicable
corrective action plans established by, December 31, 1998. Compliance testing of
the remaining areas are scheduled for completion by April 30, 1999. Any
remaining required corrective actions are scheduled for completion by June 1,
1999, and will be tested to insure they are Year 2000 compliant. The total Year
2000 project cost is not expected to be material in relation to the Company's
financial position or results of operations.

     Although the Company believes that its Y2K Plan will adequately address the
potential impact caused by the Year 2000 problem, there can be no assurance that
the Company's Y2K Plan will be sufficiently comprehensive or that it will be
completed on a timely basis.  In addition, there can be no assurance that the
systems of other companies on which the Company's systems rely will be Y2K
compliant, or that a failure to convert by a supplier or customer, or a
conversion that is incompatible with the Company's systems, would not have a
material adverse affect on the Company.  If a key supplier of the Company fails
to be Y2K compliant, the Company could suffer a material loss of business or
incur significant additional expenses.  The Company has developed the framework
for contingency plans in the event it or third parties are unable to complete
system modification to address the Year 2000 issue.
 

                                       14
<PAGE>
 
     Other than historical facts, disclosures and statements made by the Company
should be considered forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995.  These disclosures and
statements involve a number of risks and uncertainties including, but not
limited to, technological change, quarterly fluctuations, integration of Mizar
and Loughborough Sound Images, dependence on the defense industry, dependence
upon key suppliers and employees, competition, and Year 2000 compliance.  The
foregoing list should not be construed as exhaustive and the Company disclaims
any obligation subsequently to revise forward-looking statements to reflect
unanticipated events.  For a further explanation of risk factors, please see the
Company's most recent SEC filings.  The Company further cautions users who may
utilize published bookings and backlog information as tools to forecast the
Company's revenue during a given timeframe since certain purchase orders may be
subject to 1) cancellation and, 2) revision to delivery schedules.

                                       15
<PAGE>
 
                            Blue Wave Systems Inc.

                        Part II.     Other Information


Item 4.  Submission of Matters to a Vote of Security Holders

     The Company's Annual Meeting of Stockholders was held on February 2, 1999.
The following measure was approved at the meeting:
 
<TABLE>
<CAPTION>
                                                                   Shares             Shares             Shares
                                                                     For              Against          Abstaining
                                                              -----------------  -----------------  -----------------
<S>                                                           <C>                <C>                <C>
Election of Directors:
       Simon Yates                                                10,963,875           15,120              7,200
       John Forrest                                               10,963,575           15,420              7,200
       Rob Shaddock                                               10,963,875           15,120              7,200
       John Rynearson                                             10,964,075           14,920              7,200
       Sam Smith                                                  10,963,675           15,320              7,200
</TABLE>


Item 6.  Exhibits and Reports on Form 8-K

(a)  Exhibits (exhibit reference numbers refer to Item 601 of Regulation S-K)

     10.1   Credit Agreement by and between Fleet National Bank and the Company
            dated December 11, 1998.

     10.2   Advice of Borrowing Terms by and between National Westminster Bank
            plc and the Company dated December 16, 1998.

     11(a)  Computation of Per Share Income (Loss) for the three months ended
            December 31, 1998 and 1997.

     11(b)  Computation of Per Share Income (Loss) for the six months ended
            December 31, 1998 and 1997.

     27     Financial Data Schedule (filed electronically only).

(b)  Reports on Form 8-K

     None.

                                       16
<PAGE>
 
                            Blue Wave Systems Inc.


                                  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 thereunto duly authorized.


                                   Blue Wave Systems Inc.

 
Date: February 15, 1999            By /s/  Charles D. Brockenbush
      -----------------              ---------------------------------
                                      Charles D. Brockenbush
                                      Vice President, Finance and
                                      Chief Financial Officer
                                      (Principal Financial and
                                      Accounting Officer)

                                       17
<PAGE>
 
                                 Exhibit Index
                                        
Exhibit
   No.              Description
- --------    ----------------------------
10.1        Credit Agreement by and between Fleet National Bank and the Company
            dated December 11, 1998.

10.2        Advice of Borrowing Terms by and between National Westminster Bank
            plc and the Company dated December 16, 1998.

11(a)       Computation of Per Share Income (Loss) for the three months ended
            December 31, 1998 and 1997.

11(b)       Computation of Per Share Income (Loss) for the six months ended
            December 31, 1998 and 1997.

27          Financial Data Schedule (filed electronically only).

<PAGE>
 
                                                                    Exhibit 10.1
                                                                                



                                        
- --------------------------------------------------------------------------------
                                        
                                        
                                        
                                        
                               CREDIT AGREEMENT
                                        

                                    Between


                            BLUE WAVE SYSTEMS INC.


                                      And


                              FLEET NATIONAL BANK





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


                               December 11,1998



- --------------------------------------------------------------------------------
<PAGE>
 
                               TABLE OF CONTENTS

                                                            PAGE
ARTICLE I - DEFINITIONS...................................................... 1

  1.1   Defined Terms........................................................ 1
  1.2   Accounting Terms..................................................... 16
  1.3   Certain Matters of Construction...................................... 16

ARTICLE II - DESCRIPTION OF THE CREDIT....................................... 16

  2.1   The Credit Facilities................................................ 16
  2.2   Interest Rates and Payments of Interest.............................. 17
  2.3   Duration of Interest Periods......................................... 17
  2.4   The Note............................................................. 18
  2.5   Notice and Manner of Borrowing....................................... 19
  2.6   Fees................................................................. 19
  2.7   Payments; Debit Authorization; Application of Payments............... 21
  2.8   The Loan Account..................................................... 21
  2.9   Late Fee; Default Rate............................................... 21
  2.10  Voluntary Prepayments................................................ 22
  2.11  Mandatory Prepayments................................................ 22
  2.12  Use of Proceeds...................................................... 22
  2.13  Changed Circumstances................................................ 22
  2.14  Funding Losses....................................................... 24
  2.15  Savings Clause....................................................... 25
  2.16  Taxes................................................................ 25
  2.17  Special Provisions Relating To Letters of Credit..................... 26
        2.17.1  Requests for Letters of Credit............................... 26
        2.17.2  Payment of Reimbursement Obligations......................... 26
        2.17.3  Indemnification.............................................. 26
        2.17.4  Assumption of Risk by the Borrower........................... 26
        2.17.4  Cash Collateral.............................................. 27

ARTICLE III - CONDITIONS..................................................... 28

  3.1   Closing Conditions................................................... 28
        3.1.1   Executed Loan Documents...................................... 28
        3.1.2   No Material Change........................................... 28
        3.1.3   Warranties and Representations Accurate...................... 28
        3.1.4   Financials................................................... 28
        3.1.5   Validity and Sufficiency of Collateral Documents............. 28
        3.1.6   No Other Liens; Taxes and Municipal Charges Current.......... 28
        3.1.7   Condition of Collateral...................................... 29
 

                                      (i)
<PAGE>
 
        3.1.8   Insurance.................................................... 29
        3.1.9   Organizational Documents and Entity Agreements............... 29
        3.1.10  Votes, Consents and Authorizations........................... 29
        3.1.11  Legal and Other Opinions..................................... 29
        3.1.12  No Default................................................... 29
        3.1.13  Closing Certificate.......................................... 29
        3.1.14  Other Documents and Information.............................. 30
        3.1.15  Proceedings, Etc............................................. 30
        3.1.16  Payment of Lenders' Counsel's Fees and Costs................. 30
  3.2   Conditions Precedent to All Loans.................................... 30

ARTICLE IV - BORROWER'S REPRESENTATIONS AND WARRANTIES....................... 31

  4.1   Organization......................................................... 31
  4.2   Authorization, No Violations......................................... 31
  4.3   Ownership; Subsidiaries.............................................. 32
  4.4   Governmental and Other Approvals..................................... 32
  4.5   Litigation........................................................... 32
  4.6   Absence of Burdensome Contracts and Restrictions..................... 32
  4.7   Financial Statements; No Undisclosed Liabilities; No Changes......... 33
  4.8   Licenses, Permits, Compliance with Law, Etc.......................... 33
  4.9   Title to Properties and Assets....................................... 33
  4.10  Leases............................................................... 34
  4.11  Patents; Trademarks, Etc............................................. 34
  4.12  Tax Returns and Taxes................................................ 34
  4.13  ERISA Matters........................................................ 34
  4.14  No Default........................................................... 35
  4.15  Margin Stock......................................................... 35
  4.16  Collateral Documents................................................. 35
  4.17  Disclosure........................................................... 35
  4.18  Survival of Representations and Warranties........................... 35
  4.19  Solvency............................................................. 36
  4.20  Year 2000............................................................ 36
  4.21  Statutory Indebtedness Restrictions.................................. 36

ARTICLE V - AFFIRMATIVE COVENANTS............................................ 36

  5.1   Information to be Furnished.......................................... 36
  5.2   Accounting Practices and Changes..................................... 39
  5.3   Notice Requirements.................................................. 39
  5.4   Inspection........................................................... 40
  5.5   Type of Business..................................................... 40
  5.6   Legal Existence...................................................... 41
  5.7   Payment of Taxes and Claims.......................................... 41
  5.8   Maintenance of Properties............................................ 41
  5.9   Maintenance of Insurance............................................. 41


                                     (ii)

<PAGE>
 
  5.10  Compliance With Law.................................................. 42
  5.11  Additional Subsidiaries.............................................. 42
  5.12  Further Assurances................................................... 42

ARTICLE VI - NEGATIVE COVENANTS.............................................. 42

  6.1   Financial Covenants.................................................. 42
        6.1.1   Minimum Quick Ratio.......................................... 42
        6.1.2   Minimum Profitability/Maximum Quarterly Losses............... 43
        6.1.3   Minimum Tangible Net Worth................................... 43
        6.1.4   Maximum Total Liabilities/Tangible Net Worth................. 43
  6.2   Liens, Security Interests, Etc....................................... 43
  6.3   Indebtedness......................................................... 45
  6.4   Merger; Consolidation; Sale or Lease of Assets....................... 45
  6.5   Sale and Leaseback................................................... 45
  6.6   Acquisitions; Investments............................................ 45
  6.7   ERISA................................................................ 46
  6.8   Equity Distributions................................................. 46
  6.9   Transactions With Affiliates......................................... 46
  6.10  Fiscal Year.......................................................... 46
  6.11  Bank Accounts........................................................ 46
  6.12. Change of Control; Changes in Capital Structure...................... 47
  6.13. Subordinated Debt.................................................... 47

ARTICLE VII - POWER OF ATTORNEY.............................................. 47

ARTICLE VIII - EVENTS OF DEFAULT; REMEDIES................................... 48

  8.1   Events of Default.................................................... 48
  8.2   Remedies Upon Default................................................ 51
  8.3   Remedies Cumulative.................................................. 51

ARTICLE IX - PARTICIPATIONS.................................................. 51

  9.1   Participations....................................................... 51
  9.2   Disclosure........................................................... 52
  9.3   Assignments to Federal Reserve Bank.................................. 52
  9.4   No Assignment by Borrower............................................ 52

ARTICLE X - GENERAL.......................................................... 52

  10.1  Set-Off.............................................................. 52
  10.2  Amendments and Waivers............................................... 52
  10.3  Notices.............................................................. 53
  10.4  Waivers and Assents.................................................. 54
  10.5  Marshaling........................................................... 54
  10.6  Expenses............................................................. 55

                                     (iii)
<PAGE>
 
  10.7  Indemnification...................................................... 55
  10.8  Sealed Instrument; Successors and Assigns............................ 55
  10.9  Governing Law........................................................ 55
  10.10 Provisions Severable................................................. 56
  10.11 Rights and Remedies Cumulative....................................... 56
  10.12 Captions............................................................. 56
  10.13 Counterparts......................................................... 56
  10.14 Term of Agreement.................................................... 56
  10.15 Integration; Ambiguities............................................. 56
  10.16 Jury Waiver.......................................................... 57

                                   EXHIBITS
                                   --------

Exhibit 2.4(a)  -   Form of Revolving Credit Note                
Exhibit 2.5     -   Notice of Borrowing or Conversion            
Exhibit 4.3     -   Ownership of Borrower and Subsidiaries       
Exhibit 4.5     -   Litigation                                   
Exhibit 4.7     -   Material Changes                             
Exhibit 4.8     -   Licenses, Permits, Compliance With Law       
Exhibit 4.9     -   Existing Financing Statements, Trade names,  
                    Name Changes, Mergers, Acquisitions          
Exhibit 4.12    -   Tax Claims                                   
Exhibit 5.1(c)  -   Form of Covenant Compliance Certificate      
Exhibit 5.1(e)  -   Form of Borrowing Base Certificate           
Exhibit 5.3(l)  -   Form of Assignment and Notice of Assignment  
                    (U.S. Government Contracts)                  
Exhibit 6.3     -   Existing Indebtedness                         
         
                                     (iv)
<PAGE>
 
                               CREDIT AGREEMENT

     THIS CREDIT AGREEMENT (this "Agreement") is dated as of December ___ 1998
                                  ---------                                  
and entered into by and among BLUE WAVE SYSTEMS INC., a Delaware corporation
("Borrower"), having its chief executive office at 2410 Luna Road, Carrollton,
  --------
Texas 75006, and FLEET NATIONAL BANK, a national banking association having its
head office at One Federal Street, Boston, Massachusetts 02110 ("Lender").
                                                                 ------
                                   RECITALS:
                                   --------

     WHEREAS, Borrower has requested that Lender establish a revolving line of
credit and letter of credit facility pursuant to which Lender may make loans,
issue letters of credit and provide other financial accommodations to Borrower;

     WHEREAS, in reliance upon the representations and warranties of Borrower
contained herein, Lender is willing to establish such credit facilities and
provide such financial accommodations to Borrower on the terms and conditions
set forth herein;

     NOW, THEREFORE, in consideration of the mutual covenants contained herein
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged by the parties, the parties hereby agree as
follows:


                                   ARTICLE I

                                  DEFINITIONS
                                  -----------

     Section 1.1 Defined Terms. All capitalized terms used in this Agreement or
                 -------------                                                 
in any certificate, report or other or other document made or delivered pursuant
to this Agreement (unless otherwise defined therein) shall have the meanings
assigned to them below:

     Accounts. All rights to payment for goods sold or leased or for services
     --------                                                                
rendered, all sums of money or other proceeds due or becoming due thereon, all
instruments pertaining thereto, all guarantees and security therefor, all goods
giving rise thereto and all rights pertaining to and interest in such goods
including the right of stoppage in transit; all rights under contracts to
receive money, all other rights and claims to the payment of money, including,
without limitation, chattel paper and amounts due from affiliates of Borrower;
and insurance proceeds with respect to any of the foregoing.

     Adjusted Libor Rate. With respect to any Libor Loan for the applicable
     -------------------                                                   
Interest Period, (i) the Libor Rate divided by (ii) a number equal to the number
one minus the Libor Reserve Percentage. The Adjusted Libor Rate shall be
adjusted automatically on and as of the effective date of any change in the
Libor Reserve Percentage. For
<PAGE>
 
                                      -2-

purposes of this definition, "Libor Rate" and "Libor Reserve Percentage" shall
have the following meanings:

     "Libor Rate" means the simple average (rounded upwards, if necessary, to
     the next 1/16 of 1%) of the rates shown on the display referred to as the
     "Telerate Page 3750," or any display substituted therefor, of the Dow Jones
     Telerate Service, as being the respective rates at which deposits in U.S.
     Dollars would be offered by the principal London offices of each of the
     banks named thereon to major banks in the London interbank market at
     approximately 11:00 A.M., London time in an amount approximately equal to
     the principal amount of such Libor Loan, for a period of time equal to such
     Interest Period, two Business Days prior to the Business Day on which such
     Interest Period begins. In the event that such rate is not available at
     such time for any reason, then "Libor Rate" with respect to such Libor Loan
     for such Interest Period shall be the per annum interest rate equal to (i)
     the simple average, rounded upwards, if necessary, to the next 1/16 of 1%,
     of the rates at which deposits in U.S. Dollars are offered by the principal
     London offices of any three major banks in the London interbank market (as
     selected by Lender) at approximately 11:00 A.M., London time, two Business
     Days prior to the Business Day on which such Interest Period begins, in an
     amount approximately equal to the principal amount of such Libor Loan, for
     a period of time equal to such Interest Period, divided by (ii) a number
     equal to the number one minus the Libor Reserve Percentage.

     "Libor Reserve Percentage" applicable to any Interest Period means the
     maximum effective rate (expressed as a decimal) of the statutory reserve
     requirements (without duplication, but including, without limitation,
     basic, supplemental, marginal and emergency reserves) applicable to Lender
     during such Interest Period under regulations of the Board of Governors of
     the Federal Reserve System (or any successor), including without limitation
     Regulation D or any other regulation dealing with maximum reserve
     requirements which are applicable to Lender with respect to its
     "Eurocurrency Liabilities," as that term may be defined from time to time
     in Regulation D of the Board of Governors of the Federal Reserve System (or
     any successor), as in effect from time to time, or which in any other
     respect relate to the funding of Libor Loans.

     Affiliate. See Section 6.9
     ---------                 

     Agreement. This Agreement (including all exhibits, schedules, annexes and
     ---------                                                                
the like referred to herein) as originally executed, or if amended, restated,
supplemented, or otherwise modified from time to time, as so amended, restated,
supplemented or modified.
<PAGE>
 
                                      -3-


     Applicable Margin. As of any date, for the period commencing on the
     -----------------                                                  
Closing Date and ending on the first Interest Rate Adjustment Date, as defined
below, occurring after the Closing Date (the "Initial Period"), with respect to
                                              ----------------                 
Prime Rate Loans, one percent (1.0%) per annum (it being understood that no
Libor Loans shall be available during the Initial Period), and thereafter, the
applicable per annum percentage set forth below:

                                                                      PRIME RATE
   LEVEL              EBITDA                     LIBOR LOANS             LOANS
   -----    --------------------------    -------------------------   ----------
     I       Equal to or greater than                               
                    $1,000,000                      2.5%                 .50%
                                                                    
    II         $1.00 - $999,999.99                  2.75%                .75%
                                                                    
    III         $0.99 - ($250,000)        LIBOR LOANS NOT AVAILABLE      1.0%
                                                                    
    IV      ($250,000.01) - ($500,000)    LIBOR LOANS NOT AVAILABLE      2.0%
                                                                    
     V         Less than ($500,000)       LIBOR LOANS NOT AVAILABLE      4.0%


For purposes of calculating the Applicable Margin, EBITDA shall be based on
Borrower's financial statements most recently delivered to Lender pursuant to
Section 5.1 (a) and (b)(i), with changes in the Applicable Margin resulting from
a change in EBITDA to be effective as of the fifteenth (l\\5\\th) day of the
month in which each such financial statements are delivered by Borrower to
Lender (each such date, an "Interest Rate Adjustment Date"). In the event that
                            -----------------------------                   
the financial statements required to be delivered pursuant to Section 5.1(a) and
(b)(i) are not delivered when due, then during the period from the date on which
such financial statements were required to be delivered until the fifteenth day
of the month in which they actually are delivered, the "Applicable Margin" shall
be deemed to be the highest percentage set forth in the above table. In the
event that the Applicable Margin which is calculated based on Borrower's
unaudited financial statements for the last fiscal quarter of any fiscal year of
Borrower delivered pursuant to Section 5.1(b)(i) is different than the
Applicable Margin which is calculated based on Borrower's audited financial
statements delivered pursuant to Section 5.1(a) for such year, then the
Applicable Margin shall be adjusted retroactively and, upon demand by Lender,
Borrower shall pay to Lender an amount equal to the difference, if positive,
between the two calculations. If the difference between the two calculations is
negative,
<PAGE>
 
                                      -4-

such amount shall be credited against accrued interest on the Loans then
outstanding, or, if no Loans are then outstanding, such amount shall be credited
against interest accruing on any Loans made thereafter.

     Blue Wave Guaranty. The Guarantee dated December 15, 1998 executed by
     ------------------                                                   
Borrower in favor of NatWest for obligations of UK Subsidiary under the UK Loan
Documents.

     Borrowing Base. As of the date of any determination thereof, (i) for the
     --------------                                                          
period commencing on the Closing Date and ending on the last day of the month in
which both of the following events shall have occurred: (a) a field examination
of Borrower conducted by Lender with results satisfactory to Lender is
completed, and (b) Net Income for Borrower's fiscal quarter ending December 31,
1998 shall be equal to or greater than a loss of fifty thousand dollars
($50,000.00), an amount equal to fifty percent (50%) of the Net Outstanding
Amount of Eligible Accounts due and owing at such time, and (ii) thereafter, an
amount equal to eighty percent (80%) of the Net Outstanding Amount of Eligible
Accounts due and owing at such time.

     Borrowing Base Certificate. A Borrowing Base Certificate, in the form set
     --------------------------                                               
forth on Exhibit 5.1(e) hereto, or such other form as Lender shall provide to
         -------------                                                       
Borrower.

     Business Day. (i) For all purposes other than as covered by subclause (ii)
     ------------                                                              
hereof, any day other than a Saturday, Sunday or other day on which commercial
banks in Boston, Massachusetts are authorized or required by law to close, and
(ii) with respect to all notices and determinations in connection with, and
payments of principal and interest on, Libor Loans, any day that is a business
day described in subclause (i) hereof and that is also a day for trading by and
between banks in deposits of freely transferable United States dollars in the
London interbank eurodollar market.

     Cash and Cash Equivalents. (i) Cash on hand or on deposit in any bank or
     -------------------------                                               
trust company which has not suspended business, (ii) securities issued, or
directly and fully guaranteed or insured, by the United States government or any
agency or instrumentality thereof having maturities of not more than six months
from the date of acquisition, (iii) certificates of deposit and eurodollar time
deposits with maturities of six months or less from the date of acquisition,
bankers' acceptances, with maturities not exceeding six months, and overnight
bank deposits, in each case with Lender or with any domestic commercial bank
having capital and surplus in excess of $500,000,000, (iv) repurchase
obligations with a term of not more than seven days for underlying securities of
the types described in clause (ii) above and entered into with any financial
institution meeting the qualifications specified in clause (iii) above, (v)
commercial paper issued by Lender or the parent corporation of Lender, and
commercial paper rated A-1 or the equivalent thereof by Standard & Poor's
Ratings Group, a division of McGraw-Hill, Inc., a New York corporation, or P-1
or the equivalent thereof by Moody's Investors Service, Inc., and in each case
maturing
<PAGE>
 
                                      -5-

within six months after the date of acquisition, and (vi) a readily redeemable
"money market mutual fund" advised by a bank described in clause (iii) hereof,
or as investment advisor registered under Section 203 of the Investment Advisors
Act of 1940, that has and maintains an investment policy limiting its investment
primarily to instruments of the types described in clauses (i) through (v)
hereof and having on the date of such investment total assets of at least One
Hundred Million Dollars ($100,000,000.00).

     Change of Control. The occurrence of any of the following:
     -----------------                                         

     (i)    any "person" or "group" (each as used in Sections 13(d)(3) and
            14(d)(2) of the Securities Exchange Act of 1934, as amended from
            time to time) either (A) becomes the "beneficial owner" (as defined
            in Rule 13d-3 of the Exchange Act), directly or indirectly, of
            voting capital stock of Borrower (or securities convertible into or
            exchangeable for such voting capital stock) representing twenty
            percent (20%) or more of the combined voting power of all voting
            capital stock of Borrower (on a fully diluted basis), or (B)
            otherwise has the ability, directly or indirectly, to elect a
            majority of the board of directors of Borrower; or

     (ii)   during any period of up to 24 consecutive months, commencing on the
            Closing Date, individuals who at the beginning of such 24-month
            period were directors of Borrower shall cease for any reason (other
            than (A) the death, disability or retirement of a director, or (B)
            the death, disability or retirement of an officer of Borrower who is
            serving as a director at such time so long as another officer of
            Borrower replaces such Person as a director) to constitute a
            majority of the board of directors of Borrower; or

     (iii)  any Person or two or more Persons acting in concert shall have
            acquired by contract or otherwise, or shall have entered into a
            contract or arrangement that, upon consummation thereof, will result
            in its or their acquisition of the power to exercise, directly or
            indirectly, a controlling influence on the management or policies of
            the Borrower.

     Closing Date. The Business Day on which Lender shall be satisfied that the
     ------------                                                              
conditions precedent set forth in Article III hereof have been satisfied.

     Code. The Internal Revenue Code of 1986 and the rules and regulations
     ----                                                                 
thereunder, collectively, as the same may from time to time be supplemented or
amended and remain in effect.

     Collateral. All property in which a security interest, mortgage or other
     ----------                                                              
lien is currently or hereafter granted to Lender to secure the Obligations.
<PAGE>
 
                                      -6-


     Collateral Documents. Any and all documents, instruments and agreements now
     --------------------                                                       
or hereafter providing security for the Obligations and any other Indebtedness
of Borrower or any Subsidiary to Lender, including without limitation the
following documents, instruments and agreements between, or in favor of, Lender
and Borrower or any Subsidiary: any mortgages on and collateral assignments of
real property interests (fee, leasehold and easement) of Borrower and any
Subsidiary granting Liens thereon; landlord lien waivers and consents as may be
reasonably requested by the Lender; security agreements granting first Liens on
all Borrower's and any Subsidiary's fixtures and tangible and intangible
personal property; collateral assignments of Borrower's and any Subsidiary's
contracts, licenses, permits, easements and leases; collateral assignments of
Borrower's and any Subsidiary's copyrights; conditional assignments of
Borrower's and any Subsidiary's trademarks and patents; any subordination
agreement; any software escrow agreement, any guaranty by a Subsidiary; any
pledge of the capital stock of any Subsidiary; casualty and liability insurance
policies providing coverage to Lender; UCC-1 financing statements or similar
filings perfecting the above-referenced security interests, pledges and
assignments, all as executed, delivered to and accepted by Lender on or prior to
the Closing Date or subsequent to the Closing Date as may be required by this
Agreement, as any of the foregoing may be amended in writing by Lender and any
other party or parties thereto.

     Covenant Compliance Certificate. A Covenant Compliance Certificate, in the
     -------------------------------                                           
form set forth on Exhibit 5.1(c) hereto, or such other form as shall be provided
                  --------------      
by Lender to Borrower.

     Current Liabilities. All liabilities of Borrower and its Subsidiaries which
     -------------------                                                        
would, in accordance with GAAP on a consolidated basis, be classified as current
liabilities of entities conducting a business the same as or similar to that of
Borrower and its Subsidiaries, including without limitation, all lease rental
payments under capitalized leases and fixed prepayments of, and sinking fund
payments and reserves with respect to, Indebtedness, in each case required to be
made within one year from the date of determination.

     Default. An event which with the passage of time or the giving of notice,
     -------                                              
or both, shall constitute an Event of Default.

     Dollars and the sign "$". The lawful money of the United States of America.
     ------------------------                                                   

     Domestic Subsidiary. A Subsidiary of Borrower organized under the laws of
     -------------------                                                      
the United States or any state thereof or Puerto Rico.

     Default Rate. See Section 2.9.
     ------------                  
<PAGE>
 
                                      -7-


     EBITDA. As of the date of any determination and for the period specified,
     ------                                                                   
Net Income plus, to the extent deducted in the calculation of Net Income, the
           ----                                                              
sum of (i) deductions for income taxes, or, if Borrower is treated for tax
purposes as a pass-through entity, the aggregate amount of taxes on such income
payable by the shareholders or other owners thereof, (ii) interest expense,
(iii) depreciation expense, (iv) amortization expense, and (v) other non-cash
charges, as determined in accordance with GAAP ("Adjusted Net Income")
                                                 ------------------- 
calculated as follows: (i) for Borrower's fiscal quarter ending December 31,
1998, Adjusted Net Income for such period times four (4); (ii) for Borrower's
                                          -----                              
fiscal quarter ending March 31, 1999, Adjusted Net Income for Borrower's fiscal
quarters ending December 31, 1998 and March 31, 1999 times two (2); (iii) for
                                                     -----                   
Borrower's fiscal quarter ending June 30, 1999, Adjusted Net Income for
Borrower's fiscal quarters ending December 31, 1998, March 31, 1999 and June 30,
1999 divided by .75; and for each of Borrower's fiscal quarters ending after
     ----------                                                             
June 30, 1999, for the rolling four fiscal quarter period consisting of
Borrower's fiscal quarter then ending and Borrower's immediately preceding three
fiscal quarters.

     Eligible Accounts. Accounts created by Borrower as to which Lender has a
     -----------------                                                       
first priority perfected security interest and has received the information
required under Section 5.1(e) of this Agreement and which strictly comply with
all of Borrower's representations, warranties and covenants contained herein
with respect thereto, excluding:

     (i)    Accounts evidenced by promissory notes or chattel paper;

     (ii)   Accounts owing by any of Borrower's employees or any Person which is
            affiliated with Borrower, directly or indirectly, by virtue of
            family membership, ownership, control or management, or any officer,
            employee or agent of such Person;

     (iii)  Accounts past due more than 90 days after the date of the original
            invoices giving rise to such Accounts;

     (iv)   Accounts owing by an account debtor whose chief executive office is
            located outside the United States of America;

     (v)    Accounts arising from sales on consignment, guaranteed sale, sale
            and return, sale on approval, or other terms under which payment may
            be conditional or contingent;

     (vi)   Accounts consisting of progress billings, bill and hold receivables,
            or retainages;
<PAGE>
 
                                      -8-


     (vii)  Accounts as to which a contra or other right of set-off exists, or
            as to which an account debtor has asserted a counterclaim, defense
            or dispute;

     (viii) Accounts arising from sales of goods subject to any lien or other
            encumbrance other than liens in favor of Lender;

     (ix)   Accounts owing by the United States of America, or any state,
            political subdivision, department, agency or instrumentality
            thereof, unless pursuant to Section 5.3(I) hereof, a completed and
            duly executed Assignment and Notice of Assignment has been delivered
            to Lender in triplicate and any and all other requirements imposed
            by the Federal Assignment of Claims Act of 1940, as amended and
            including any successor statute thereto, or any similar state or
            local law has been complied with in a manner satisfactory to Lender;

     (x)    Accounts owing by any account debtor whose accounts with Borrower
            are past due more than ninety (90) days after the date of the
            original invoices evidencing such Accounts which constitute more
            than thirty-three percent (33%) of the total Accounts owing by such
            account debtor;

     (xi)   Amounts owing by any account debtor in excess of $150,000 in the
            aggregate, other than account debtors approved in writing by Lender
            having a minimum BBB-1 senior unsecured debt rating, or the
            equivalent thereof, by Standard & Poor's Ratings Group, a division
            of McGraw-Hill, Inc., a New York corporation, or a minimum Baa3
            senior unsecured debt rating, or the equivalent thereof, by Moody's
            Investors Service, Inc., as to which any amount in excess of
            $500,000 shall be excluded; and

     (xii)  Accounts otherwise deemed ineligible by Lender on the basis of any
            collectibility or other credit or collateral concerns therewith.

     Environmental Laws. All applicable past (which have current effect),
     ------------------      
present or future federal, state, county and local laws, by-laws, rules,
regulations, codes and ordinances, or any judicial or administrative
interpretations thereof, and any requirements issued by any governmental agency
or authority having or claiming jurisdiction with respect thereto, including,
without limitation, all orders, decrees, judgments, rulings, directives or
notices of violation that pertain to any property owned or leased by Borrower,
imposed through any public or private enforcement proceedings, that create one
or more duties, obligations, responsibilities or liabilities with respect to:
(i) the regulation or protection of the environment; (ii) any environmental
pollution or impairment; (iii) any environmental permits, licenses, emissions or
effluent reduction plans and reporting requirements; and (iv) in each instance
further including, without limitation, laws governing the existence, use,
storage, treatment, discharge, release, containment, transportation, generation
<PAGE>
 
                                      -9-


manufacture, refinement, handling, production, disposal or management of any
Hazardous Materials, or otherwise regulating or providing for the protection of
the environment.

     ERISA. The Employee Retirement Income Security Act of 1974, 29 U.S.C. 1001,
     -----                                                                      
et seq., and all rules and regulations from time to time promulgated thereunder,
as the same may from time to time be supplemented or amended and remain in
effect.

     ERISA Affiliate. Any Person under common control that, together with
     ---------------                                                     
Borrower, is treated as a single employer under Section 414(b) or 414(c) of the
Code or Section 4001 of ERISA.

     Event of Default. Any of the events listed in Article VIII hereof.
     ----------------                                                  

     Federal Funds Effective Rate. For any day, a fluctuating interest rate per
     ----------------------------                                              
annum equal to the weighted average of the rates on overnight Federal funds
transactions with members of the Federal Reserve System arranged by Federal
funds brokers, as published for such date (or, if such day is not a Business
Day, for the next preceding Business Day) by the Federal Reserve Bank of New
York, or, if such rate is not so published for any day that is a Business Day,
the average of the quotations for such day on such transactions received by
Lender from three Federal funds brokers of recognized standing selected by
Lender.

     GAAP. Generally accepted accounting principles consistently applied and
     ----                                                                   
maintained throughout the period indicated and consistent with the prior
financial practices of the Borrower and its Subsidiaries, if any, as reflected
on the financial statements referred to in Section 4.6 hereof.

     Guarantee. With respect to any Person, any obligation, direct or indirect,
     ---------                                                                 
contingent or otherwise, of such Person with respect to any Indebtedness or
other obligation of any other Person, whether or not reflected on the balance
sheet of such Person, including, without limitation, any obligation, whether by
virtue of partnership arrangements, by agreement to keep-well, make capital
contributions, advances or loans, or to enter into a contract for any of the
foregoing, or otherwise (i) to purchase or pay, or advance or supply funds for
the purchase or payment of, such Indebtedness or other obligation, (ii) to
purchase or lease property, securities, or services, for the purpose of assuring
holder of such Indebtedness or other obligation of the payment thereof, (iii) as
an account party in respect of any letter of credit or letter of guaranty issued
to support such Indebtedness or obligation, provided the term Guaranty shall not
include endorsements for collection or deposit in the ordinary course of
business.

     Hazardous Materials. Asbestos, explosives, radioactive or nuclear
     -------------------                                              
substances, polychlorinated biphenyls, oil and other petroleum products, radon
gas, urea
<PAGE>
 
                                     -10-

formaldehyde, chemicals, gases, solvents, pollutants or contaminants that are
detrimental or pose a danger to the environment or to the health or safety of
any person, and any other hazardous or toxic materials, wastes and substances
which are defined, determined or identified as such in any past, present or
future federal, state or local laws, by-laws, rules, regulations, codes or
ordinances or any judicial or administrative interpretation thereof.

     Indebtedness. As applied to any Person, (i) all obligations for borrowed
     ------------                                                             
money or other extensions of credit, including all obligations representing the
deferred purchase price of property (but excluding obligations under any lease
which in accordance with GAAP is properly accounted for as an "operating
lease"), (ii) all obligations evidenced by bonds, notes, debentures or other
similar instruments, (iii) all obligations secured by any mortgage, pledge,
security interest or other lien on property owned or acquired by such Person
whether or not the obligations secured thereby shall have been assumed, (iv)
that portion of all obligations arising under capital leases that is required to
be capitalized on the consolidated balance sheet of such Person, and (v) all
Guarantees, endorsements or other contingent surety obligations with respect to
obligations of other Persons, whether or not reflected on the balance sheet of
such Person.

     Interest Period.
     --------------- 

     (a)  with respect to each Prime Rate Loan, the period commencing on the
     date of the making or continuation of or conversion to such Prime Rate
     Loan, as Borrower may elect in the applicable Notice of Borrowing or
     Conversion, and ending on the date of its repayment or conversion to a Loan
     of another type permitted hereunder; and

     (b)  with respect to each Libor Loan, the period commencing on the date of
     the making or continuation of or conversion to such Libor Loan and ending
     one, two, three, or six months thereafter, as Borrower may elect in the
     applicable Notice of Borrowing or Conversion;

provided that:
- --------      

     (i)    any Interest Period (other than an Interest Period determined
            pursuant to clause (iii) below) that would otherwise end on a day
            that is not a Business Day shall be extended to the next succeeding
            Business Day unless, in the case of Libor Loans, such Business Day
            falls in the next calendar month, in which case such Interest Period
            shall end on the immediately preceding Business Day;

     (ii)   any Interest Period applicable to a Libor Loan that begins on the
            last Business Day of a calendar month (or on a day for which there
            is no
<PAGE>
 
                                     -11-

            numerically corresponding day in the calendar month at the end of
            such Interest Period) shall, subject to clause (iii) below, end on
            the last Business Day of a calendar month;

     (iii)  any Interest Period applicable to a Revolving Loan that would
            otherwise end after the Revolving Credit Termination Date shall end
            on the Revolving Credit Termination Date; and

     (iv)   notwithstanding clause (iii) above, no Interest Period applicable to
            a Libor Loan shall have a duration of less than one month, and if
            any Interest Period applicable to such Loan would be for a shorter
            period, such Interest Period shall not be available hereunder.

     Interest Rate Adjustment Date. See definition of Applicable Margin.
     -----------------------------                                      

     Investment. With respect to any Person, all investments in any other
     ----------  
Person, whether by way of extension of credit, loan, advance, purchase of stock
or other ownership interest (other than ownership interests in such Person),
bonds, notes, debentures or other securities, or otherwise, and whether existing
on the date of this Agreement or thereafter made, but such term shall not
include the cash surrender value of life insurance policies on the lives of
officers or employees, excluding amounts due from customers for services or
products delivered or sold in the ordinary course of business.

     Letter of Credit. Any standby letter of credit issued by Lender for the
     ----------------                                                       
account of Borrower, as originally issued, or if amended or extended, as amended
or extended.

     Letter of Credit Documents. Any all Reimbursement Agreements executed by
     --------------------------                                              
Borrower.

     Libor Loans. Any Loan bearing interest at a rate determined with reference
     -----------                                                               
to the Adjusted Libor Rate.

     Loan. A Revolving Loan, and "Loans" means all of such Loans collectively.
     ----                                                                     

     Loan Account. The general ledger account on the books of Lender in which
     ------------                                                            
Lender shall record all Loans made to Borrower hereunder, plus interest,
charges, expenses and other items chargeable to Borrower pursuant to this
Agreement or any other Loan Document, payments made on the Loans by Borrower,
and other appropriate debits and credits as provided herein this Agreement or
any other Loan Document.

     Loan Documents. This Agreement, the Note, the Letter of Credit Documents,
     --------------                                                           
the Collateral Documents and any interest rate future, interest rate option,
interest rate
<PAGE>
 
                                     -12-

swap, interest rate cap or other interest rate hedge arrangement entered into by
Borrower with Lender, and each and every other agreement, instrument and
document entered into and/or delivered in connection herewith and with the
transactions contemplated hereunder, whether substantially contemporaneously
with the execution of this Agreement or at any time thereafter, in each case, as
originally executed, or if amended, restated, supplemented, or otherwise
modified from time to time, as so amended, restated, supplemented or modified.

     Material Amount. See Section 5.3(a). 
     ---------------                      

     Maximum Commitment. $2,500,000.
     ------------------              

     NatWest. National Westminster Bank PLC,
     -------                                

     Net Income. As of any date as of which the amount thereof shall be
     ----------                                                        
determined and for the period specified, the aggregate of all amounts which, in
accordance with GAAP, would be included as net income (or net loss) on a
consolidated statement of income of Borrower and its Subsidiaries for such
period, excluding (a) any extraordinary or other non-recurring gains, and (b)
any gains from the sale or disposition of assets other than in the ordinary
course of business.

     Net Outstanding Amount of Eligible Accounts. As of the date of any
     -------------------------------------------                       
determination, the outstanding amount of Eligible Accounts less any credits or
other adjustments applicable thereto.

     Note. The Revolving Credit Note.
     ----                            

     Notice of Borrowing or Conversion. See Section 2.5.
     ---------------------------------                  

     Obligations. The unpaid principal of and interest on (including, without
     -----------                                                             
limitation, interest accruing after the maturity of the Loans and interest
accruing after the filing of any petition in bankruptcy, or the commencement of
any insolvency, reorganization or like proceeding, relating to Borrower or any
of its Subsidiaries, whether or not a claim for post-filing or post-petition
interest is allowed in such proceeding) and all other obligations and
liabilities of every kind (including obligations to perform acts and refrain
from taking action as well as obligations to pay money) of Borrower and/or any
of its Subsidiaries to Lender, whether on account of principal, interest, fees,
charges and disbursements of counsel to Lender that are required to be paid by
Borrower pursuant to this Agreement, or otherwise, direct or indirect, absolute
or contingent, primary or secondary, due or to become due, now existing or
hereafter acquired or arising, which may arise out of, or in connection with
this Agreement, the Note and the other Loan Documents, and including, without
limitation, the Reimbursement Obligations.
<PAGE>
 
                                     -13-

     Obligor. Any guarantor, endorser, acceptor, surety or other Person liable
     -------  
on or with respect to the Obligations, or who is the owner of any Collateral.

     Participant. See Section 9.1.
     -----------                  

     Permitted Indebtedness. See Section 6.3.
     ----------------------                  

     Permitted Liens. See Section 6.2.
     ---------------                  

     Person. Any individual, partnership, limited liability company,
     ------  
corporation, trust, unincorporated organization or association, and any
governmental agency or political subdivision thereof.

     Post-Closing Letter. That certain letter agreement between Borrower and
     -------------------                                                    
Lender dated the Closing Date and listing certain post-closing actions to be
completed by the Borrower.

     Post-Termination Letter of Credit. See Section 2.17.5.
     ---------------------------------                     

     Prime Rate. On any day of determination, a rate per annum equal to the
     ----------                                                            
greater of (i) the fluctuating rate of interest per annum publicly announced
from time to time by Lender at its office at One Federal Street, Boston,
Massachusetts 02110 as its "Prime Rate," it being understood that such rate is a
reference rate and not necessarily the lowest or best rate charged by Lender,
which rate shall change effective from and after the date such change is
publicly announced as being effective, and (ii) the Federal Funds Effective Rate
in effect on such day plus 1/2 of 1%. Any change in the Prime Rate due to a
change in the Prime Rate or the Federal Funds Effective Rate shall be effective
from and including the effective date of such change in the Prime Rate or the
Federal Funds Effective Rate, respectively.

     Prime Rate Loan. Any Loan bearing interest determined with reference to the
     ---------------                                                            
Prime Rate.

     Proceeds. Whatever is received upon the sale, lease, exchange, collection
     --------  
or other disposition of the Collateral including, but not limited to, all
Accounts, goods, money, checks, deposit accounts, and insurance proceeds.

     Quick Ratio. See Section 6.1.1.
     -----------                    

     Reimbursement Agreement. With respect to a Letter of Credit, such form of
     -----------------------                                                  
application therefor and form of reimbursement agreement therefor (whether in a
single document or several documents) as Lender may employ in the ordinary
course of business for its own account, as originally issued, or if amended or
extended, as amended or extended.
<PAGE>
 
                                     -14-

     Reimbursement Obligations. The reimbursement or repayment obligations of
     -------------------------                                               
Borrower with respect to amounts that have been drawn under Letters of Credit.

     Revolving Credit Commitment. The lesser of (i) the Maximum Commitment, and
     ---------------------------                                                
(ii) the Borrowing Base.

     Revolving Credit Facility. The revolving line of credit established
     -------------------------  
pursuant to Section 2.1(a) hereof.

     Revolving Credit Note. The promissory note of Borrower evidencing the
     ---------------------                                                
Revolving Loans, substantially in the form of Exhibit 2.4(a) hereto, together
                                              -------------                  
with any extension, renewal, or amendment thereof, or replacements or
substitutions therefor.

     Revolving Credit Termination Date. The earlier of (a) December 31, 1999, or
     ---------------------------------                                          
(b) the date of termination in whole of the Revolving Credit Commitment pursuant
to Section 8.2(a) hereof.

     Revolving Loan. A Loan made by Lender pursuant to Section 2.1(a) hereof.
     --------------                                                          

     Security Agreement. Each of the Security Agreements executed by Borrower
     ------------------ 
and Borrower's Subsidiaries granting a security interest in favor of Lender for
the Obligations (including all exhibits, schedules, annexes and the like
referred to herein) as originally executed, or if amended, restated,
supplemented, or otherwise modified from time to time, as so amended, restated,
supplemented or modified, and "Security Agreements" means all of such
agreements.

     Subsidiary. With respect to any Person, any corporation, limited liability
     ----------                                                                
company, partnership, joint venture, trust or estate of which (or in which) more
than 50% of (a) the issued and outstanding capital stock having ordinary voting
power to elect a majority of the Board of Directors of such corporation
(irrespective of whether at the time capital stock of any other class or classes
of such corporation shall or might have voting power upon the occurrence of any
contingency), (b) the interest in the capital or profits of such limited
liability company, partnership or joint venture, or (c) the beneficial interest
in such trust or estate, is at the time directly or indirectly owned or
controlled by such Person, by such Person and one or more of its other
Subsidiaries or by one or more of such Person's other Subsidiaries.

     Subsidiary Guaranties. All guarantees executed by any Subsidiary of
     ---------------------                                              
Borrower, including without limitation, the UK Subsidiary Guaranty, whether
executed contemporaneously with this Agreement or subsequent thereto, in each
case, as originally executed, or if amended, restated, supplemented, or
otherwise modified from time to time, as so amended, restated, supplemented or
modified.
<PAGE>
 
                                     -15-

     Tangible Net Worth. At any date as of which the amount thereof shall be
     ------------------                                                     
determined, (i) the total assets of Borrower and its Subsidiaries minus (ii)
                                                                  -----     
the sum of any amounts attributable to (a) assets which would be classified as
intangible assets under GAAP, including, without limitation, goodwill,
unamortized debt discount and expense, patents, trade and service marks and
names, copyrights, franchises, and capitalized research and development costs,
(b) all reserves not already deducted from assets, (c) any write-up in the book
value of assets resulting from any revaluation thereof subsequent to the date of
the audited financial statements referred to in Section 4.7, (d) the value of
any minority interests in Subsidiaries, (e) the value of non-compete agreements,
and (f) loans to shareholders, officers or other employees, or Affiliates of
Borrower (to the extent, if any, permitted hereunder), minus (iii) Total
                                                       -----            
Liabilities, all as determined on a consolidated basis in accordance with GAAP.

     Total Liabilities. At any date as of which the amount thereof shall be
     -----------------                                                     
determined, all liabilities of Borrower and its Subsidiaries which would, in
accordance with GAAP on a consolidated basis, be classified as liabilities of an
entity conducting a business the same as or similar to that of Borrower and any
of its Subsidiaries, including, without limitation, the capitalized amount of
capitalized leases and fixed prepayments of, and sinking fund payment and
reserves with respect to, Indebtedness.

     Type. With respect to any Loan, its nature as a Prime Rate Loan or a Libor
     ----                                                                      
Loan.

     UCC Financing Statements. All Uniform Commercial Code financing statements
     ------------------------                                                  
covering all or any portion of the Collateral.

     UK Subsidiary. Blue Wave Systems Limited, a Subsidiary organized under the
     -------------                                                             
laws of [ ], having a principal place of business at Loughborough,
Leicestershire, England.

     UK Subsidiary Guaranty. The Unlimited Guarantee dated the date of this
     ----------------------                                                
Agreement executed by the UK Subsidiary in favor of Lender, as originally
executed, or if amended, restated, supplemented, or otherwise modified from time
to time, as so amended, restated, supplemented or modified.

     UK Subsidiary Loan Documents. The Advice of Borrowing Terms dated September
     ----------------------------                                               
17, 1998 executed by the UK Subsidiary in favor of NatWest, as originally
executed, or if amended, restated, supplemented, or otherwise modified from time
to time, as so amended, restated, supplemented or modified.

     Unused Revolving Credit Commitment. On any date, (x) the Revolving Credit
     ----------------------------------                                       
Commitment at such time minus the sum of (y)(i) the aggregate principal amount
                        -----                                                  
of all Revolving Loans outstanding, and (ii) the outstanding aggregate undrawn
and unreimbursed drawn amount of Letters of Credit at any time outstanding
hereunder.
<PAGE>
 
                                     -16-

     Section 1.2 Accounting Terms. All terms of an accounting character not
                 ----------------                                          
specifically defined herein have the meanings given such terms by GAAP applied
on a basis consistent with the financial statements referred to in Section 4.7
of this Agreement.

     Section 1.3 Certain Matters of Construction. The terms "herein," "hereof,"
                 -------------------------------                              
and "hereunder" and other words of similar import refer to this Agreement as a
whole and not to any particular section, paragraph or subdivision thereof. Any
pronoun used shall be deemed to cover all genders. The section captions, table
of contents and list of exhibits appear as a matter of convenience only and
shall not affect the interpretation of the Agreement. All references to statutes
and related regulations shall include any amendments of same and any successor
statutes and regulations. All references to any instruments or agreements,
including, without limitation, references to any of the Loan documents, shall
include any and all modification or amendments thereto and any and all
extensions or renewals thereof.

                                  ARTICLE II

                           DESCRIPTION OF THE CREDIT
                           -------------------------

     Section 2.1 The Credit Facilities.
                 --------------------- 

(a)  The Revolving Loans. Subject to the terms and conditions set forth herein,
     -------------------                                                       
and so long as no Default or Event of Default has occurred which is continuing,
Lender agrees to make Revolving Loans to Borrower from time to time on any
Business Day on and after the Closing Date and prior to the Revolving Credit
Termination Date, as requested, in an amount for each such Loan not to exceed
(after giving effect to any Loan requested) the Unused Revolving Credit
Commitment on such Business Day. All Revolving Loans may be repaid and
reborrowed in accordance with the terms hereof. Any Revolving Loan not repaid by
the Revolving Credit Termination Date shall be due and payable on such date; and

(b)  Letters of Credit. Subject to the terms and conditions set forth herein,
     -----------------  
and so long as no Default or Event of Default has occurred, Borrower may also
request Letters of Credit, provided that the aggregate undrawn and unreimbursed
                           -------------                                       
drawn amount of Letters of Credit at any time outstanding hereunder after giving
effect to such request, shall not exceed the Unused Revolving Credit Commitment.
All Letters of Credit shall be issued on an annual renewable basis and shall
expire on or before the Business Day next preceding the thirtieth day preceding
the Revolving Credit Termination Date. Letters of Credit may be issued by
Lender, in its sole discretion, subject to the conditions of this Agreement.
<PAGE>
 
                                     -17-

     Section 2.2 Interest Rates and Payments of Interest.
                 --------------------------------------- 

(a)  Revolving Loans. So long as no Default or Event of Default has occurred
     ---------------                                                        
which is continuing and subject to the terms and conditions set forth herein,
Borrower may elect to have any Revolving Loan, or any portion thereof, made as a
Prime Rate Loan or a Libor Loan (in minimum amounts of $250,000 and integral
multiples of $250,000 in the case of a Libor Loan), and may continue or convert
all or any part of a Revolving Loan (in minimum amounts of $250,000 and integral
multiples of $250,000 in the case of a conversion to a Libor Loan) into a Loan
of any other Type permitted by this Agreement, on any Business Day (which, in
the case of a conversion of a Libor Loan, shall be the last day of the Interest
Period applicable to such Loan). Borrower shall give Lender prior notice of each
such conversion (which notice shall be effective upon receipt) in accordance
with Section 2.5 hereof.

     (i)    Each Prime Rate Loan shall bear interest on the outstanding
     principal amount thereof at a rate per annum equal to the Prime Rate plus
                                                                          ----
     the Applicable Margin, which rate shall change contemporaneously with any
     change in the Prime Rate. Such interest shall be payable in arrears on the
     first day of each month and when such Prime Rate Loan is due (whether at
     maturity, by reason of acceleration or otherwise);

     (ii)   Each Libor Loan shall bear interest on the outstanding principal
     amount thereof, for each Interest Period applicable thereto, at a rate per
     annum equal to the Adjusted Libor Rate plus the Applicable Margin. Such
                                            ----
     interest shall be payable quarterly and on the last day of the Interest
     Period applicable thereto and when such Libor Loan is due (whether at
     maturity, by reason of acceleration or otherwise);

(b)  Other Limitations on Libor Loans. In no event shall Borrower have more than
     --------------------------------                                           
three (3) different maturities of borrowings of Libor Loans outstanding at any
time and no Revolving Loan shall be made or continued as, or converted to, a
Libor Loan on any day on which, for purposes of determining the Applicable
Margin, EBITDA is less than $1.00. Any Libor Loan outstanding on any Interest
Rate Adjustment Date on which, for purposes of determining the Applicable
Margin; EBITDA is less than $1.00, shall be converted to Prime Rate Loans on
such Interest Rate Adjustment Date, and Borrower shall pay Lender forthwith upon
demand any amount due under Section 2.14 as a result of any such conversion];
and

(c)  360 Days. Interest shall be calculated on the basis of a 360-day year for
     --------                                                                 
the actual number of days elapsed.

     Section 2.3 Duration of Interest Periods.
                 ----------------------------

(a)  Subject to the provisions of the definition of Interest Period, the
duration of each
<PAGE>
 
                                     -18-

Interest Period applicable to a Libor Loan shall be as specified in the
applicable Notice of Borrowing or Conversion. Borrower shall have the option to
elect a subsequent Interest Period to be applicable to any such Loan by giving
notice of such election to Lender received no later than 11:00 a.m. Boston time
on the date which is the last Business Day of the then applicable Interest
Period if such Loan is to be continued as or converted to a Prime Rate Loan, and
three Business Days before the end of the then applicable Interest Period if
such Loan is to be continued as or converted to a Libor Loan;

(b)  If Lender does not receive a notice of election of duration of an Interest
Period for a Libor Loan pursuant to subsection (a) above within the applicable
time limits specified therein, or if, when such notice must be given, a Default
or an Event of Default exists, Borrower shall be deemed to have elected to
convert such Loan in whole into a Prime Rate Loan on the last day of the then
current Interest Period with respect thereto; and

(c)  Notwithstanding the foregoing, Borrower may not select an Interest Period
that would end, but for the provisions of the definition of Interest Period,
after the Revolving Credit Termination Date.

     Section 2.4 The Note.
                 -------- 

(a)  The Revolving Loans shall be evidenced by a promissory note made by
Borrower and payable to the order of Lender, substantially in the form of
Exhibit 2.4(a) hereto;
- --------------

(b)  Lender may, and is hereby irrevocably authorized by Borrower to, enter on
any schedule forming a part of any Note, or otherwise in its records,
appropriate notations evidencing the date and the amount of each Loan and the
date and amount of each payment of principal made by Borrower with respect
thereto; and such notations shall constitute prima facie evidence thereof.
                                             -----------                  
Lender is hereby irrevocably authorized by Borrower to attach to and make a part
of any Note a continuation of any such schedule as and when required, provided
that Borrower shall have the right to contest the accuracy thereof. No failure
on the part of Lender to make any notation as provided in this subsection shall
in any way affect any Loan or the rights or obligations of Lender or Borrower
with respect thereto; and

(c)  In the event that Lender delivers to Borrower an affidavit and indemnity
executed by Lender stating under oath that any Note has been lost, stolen,
destroyed or mutilated and indemnifying Borrower for any losses as a result
thereof, Borrower hereby agrees to execute and deliver a new Note as a
replacement therefor, in the same principal amount and otherwise of like tenor,
promptly upon receipt of such affidavit.
<PAGE>
 
                                     -19-

     Section 2.5 Notice and Manner of Borrowing. Whenever Borrower desires to
                 ------------------------------                              
obtain or continue a Loan hereunder or convert an outstanding Loan into a Loan
of another Type, a representative of Borrower, certified in writing as
authorized to request Loans hereunder, shall notify Lender (which notice shall
be irrevocable) by telecopy or telephone received no later than 11:00 a.m.
(Boston time) on the day on which the requested Loan is to be made or continued
as, or converted to, a Prime Rate Loan, and received no later than 11:00 a.m.
(Boston time) on the date three Business Days before the day on which the
requested Loan is to be made or continued as, or converted to, a Libor Loan.
Notices received after 11:00 a.m. (Boston time) shall be deemed to have been
received on the next Business Day. Such notice shall specify (i) the effective
date and amount of each Loan or portion thereof to be made, continued or
converted, subject to the limitations set forth in this Article II, (ii) the
interest rate option to be applicable thereto, and (iii) the duration of the
applicable Interest Period, if any (subject to the provisions of the definition
of Interest Period and Section 2.3 hereof). Each such notification (a "Notice of
Borrowing or Conversion") shall be immediately followed by a written
confirmation thereof, substantially in the form of Exhibit 2.5 hereto, provided
                                                   -----------         --------
that if such written confirmation differs in any material respect from the
- ----                                                                      
action taken by Lender, the records of Lender shall control absent manifest
error. The proceeds of each Loan requested hereunder shall be disbursed by
Lender in immediately available funds, by crediting the amount of such proceeds
to an account maintained by Borrower with Lender or by wire transfer to such
other account as Borrower may direct Lender from time to time.

     Section 2.6 Fees
                 ----

(a)  Facility Fees. In connection with and as consideration for the holding
     -------------                                                         
available for the use of Borrower the revolving line and letter of credit
facility established hereunder and the ongoing administration thereof, Borrower
shall pay to Lender a facility fee for the period commencing on the Closing Date
and ending on the fifteenth (15/th/) day of the month in which Borrower's
financial statements are delivered to Lender for Borrower's fiscal quarter
ending on the first Facility Fee Adjustment Date, as defined below, occurring
after the Closing Date, three-fourths of one percent (.75%) of the Maximum
Commitment, and thereafter the applicable per annum percentage set forth below
of Maximum Commitment during each quarter or portion thereof;
<PAGE>
 
                                     -  20-

        --------------------------------------------------------------------- 
                PERIOD                  QUICK RATIO              FACILITY FEE
        --------------------------------------------------------------------- 
        Closing Date -           Greater than or equal to            .50%
          8/31/99                        1.10%
        --------------------------------------------------------------------- 
        Closing Date -               Less than 1.10%                 .75%
          8/31/99
        --------------------------------------------------------------------- 
        9/1/99 - and             Greater than or equal to            .50%
         thereafter                      1.20%
        --------------------------------------------------------------------- 
        9/1/99 - and                 Less than 1.20%                 .75%
         thereafter
        ---------------------------------------------------------------------

  Facility fees shall be payable quarterly in arrears, on the last day of March,
  June, September, and December, of each year commencing December 31, 1998 and
  on the Revolving Credit Termination Date. For purposes of calculating the
  facility fee, the Quick Ratio shall be based on Borrower's financial
  statements most recently delivered to Lender pursuant to Section 5.1 (a) and
  (b)(i), with changes in the facility fee resulting from a change in the Quick
  Ratio to be effective as of the fifteenth (15/th/) day of the month in
  which each such financial statements are delivered by Borrower to Lender (each
  such date, a ("Facility Fee Adjustment Date"). In the event that the financial
                -------------------------------                                 
  statements required to be delivered pursuant to Section 5.1(a) and (b)(i) are
  not delivered when due, then during the period from the date on which such
  financial statements were required to be delivered until the fifteenth
  (15/th/) day of the month in which they actually are delivered, the facility
  fee shall be deemed to be the highest percentage set forth in the above table
  for the applicable period. In the event that the Quick Ratio which is
  calculated based on Borrower's unaudited financial statements for the last
  fiscal quarter of any fiscal year of Borrower delivered pursuant to Section
  5.1 (b)(i) is different than the Quick Ratio which is calculated based on
  Borrower's audited financial statements delivered pursuant to Section 5.1(a)
  for such year, then the Quick Ratio shall be adjusted retroactively and, upon
  demand by Lender, Borrower shall pay to Lender an amount equal to the
  difference, if positive, between the two calculations. If the difference
  between the two calculations is negative, such amount shall be credited
  against facility fees accruing hereunder; and

  (b) Letter of Credit Fees. Borrower shall pay to Lender a fee for each Letter
      ---------------------
  of Credit issued, at a per annum rate equal to the Applicable Margin then in
  effect for LIBOR Loans, or, if LIBOR Loans shall not then be available
  hereunder, the Applicable Margin then in effect for Prime Rate Loans plus two
                                                                       --------
  percent (2%) calculated on the stated amount of such Letter of Credit. Such
  fees shall be due and payable annually
<PAGE>
 
                                     -21-

  in advance. In addition, Borrower shall pay to Lender Lender's customary
  issuance, amendment, negotiation and administrative fees with respect to each
  Letter of Credit in such amounts and at such times as the Lender shall
  specify.

       Section 2.7 Payments; Debit Authorization; Application of Payments.
                   ------------------------------------------------------
Borrower shall make each payment of any amount due hereunder or under the Note
not later than 2 p.m. (Boston time) on the date when due (or on the next
Business Day if such due date is not a Business Day) in funds immediately
available to Lender at One Federal Street, Boston, Massachusetts 02110, or such
other place as may be designated in writing from time to time by Lender to
Borrower for such purpose. Borrower authorizes Lender, if and to the extent
payment owed to Lender is not made when due hereunder or the Note, to charge
from time to time against any or all of Borrower's accounts with Lender any
amount so due. Unless otherwise determined in any particular case by Lender, in
its sole discretion, each payment on the Note shall be deemed to be applied
first to any premiums, fees or other charges accrued hereunder or under such
Note, then to accrued interest to date of receipt and then to the outstanding
balance of the principal.

       Section 2.8 The Loan Account.
                   ---------------- 

  (a)  Lender shall maintain on its books a Loan Account in the name of Borrower
       to evidence the Loans and shall also record in the Loan Account all
       payments made on account of indebtedness evidenced by the Loan Account
       and all proceeds of Collateral which are finally paid to Lender at its
       office in cash or solvent credits, and may record therein, in accordance
       with customary accounting practice, other debits and credits, including
       all charges and expenses properly chargeable to Borrower and any other
       Obligation. The debit balance of the Loan Account shall reflect the
       amount of the Obligations from time to time by reason of Loans and other
       appropriate charges hereunder; and

  (b)  At least once each month Lender shall account to Borrower with a
       statement showing as of its date the Loans, charges and payments made by
       and for the account of Borrower for such month. Each such statement shall
       be considered correct and accepted by Borrower and presumptively binding
       upon it, absent manifest error unless, within sixty (60) days after the
       date of any such statement, notice to the contrary is received by Lender
       from Borrower.

       Section 2.9 Late Fee; Default Rate. At the discretion of Lender, if any
                   ----------------------                                     
amount due hereunder or under the Note is not paid in full within ten (10) days
after the same is due, Borrower shall pay to Lender, a late fee equal to five
percent (5%) of such late payment. In addition to any such late fee imposed by
Lender, all principal not paid when due, or within any grace period provided
therefor, (whether at the scheduled or any accelerated maturity or otherwise)
and, to the extent permitted by law, overdue interest thereon, and all fees not
paid when due hereunder, or within any grace period provided therefor, shall,
at the option of Lender, bear interest, payable monthly in arrears, for each day
until paid at a rate per
<PAGE>
 
                                     -22-

annum equal to the Prime Rate plus four percent (4%)(the "Default Rate").
                              ----                        -------------- 
Nothing in this Section, nor Lender's exercise of any of its rights hereunder,
shall affect or otherwise impair Lender's right to exercise any of its rights or
remedies if any Event of Default has occurred.

       Section 2.10 Voluntary Prepayments. Prime Rate Loans may be prepaid in
                    ---------------------
whole or in part at any time. Libor Loans may be prepaid, in whole or in part,
on the last day of any Interest Period applicable thereto upon three Business
Days' notice. Any interest accrued on the amounts so prepaid to the date of any
such prepayments and any amount due under Section 2.14 hereof must be paid at
the time of any such prepayment. No prepayment of the Revolving Loans shall
impair Borrower's right to borrow as set forth in Section 2.1(a) hereof.

       Section 2.11 Mandatory Prepayments. On demand by Lender, Borrower shall
                    ---------------------
pay to Lender any amount outstanding under the Revolving Credit Facility in
excess of the Revolving Credit Commitment. All amounts paid by Borrower pursuant
to this Section shall be applied (i) first to any Prime Rate Loans then
outstanding, and (ii)then to Libor Loans then outstanding.

       Section 2.12 Use of Proceeds. The proceeds of the Loans shall be used
                    ---------------
solely for working capital and general corporate purposes of Borrower.

       Section 2.13 Changed Circumstances.
                    --------------------- 

  (a)  Illegality. In the event that:
       ----------                    

       (i)  on any date on which the Adjusted Libor Rate would otherwise be
       set, Lender shall have determined in good faith (which determination
       shall be final and conclusive so long as made in good faith) that
       adequate and fair means do not exist for ascertaining the Adjusted Libor
       Rate; or

       (ii) at any time Lender shall have determined in good faith (which
       determination shall be final and conclusive so long as made in good
       faith) that:

            (A) the making or continuation of or conversion of any Loan to a
            Libor Loan has been made impracticable or unlawful by (1) the
            occurrence of a contingency that materially and adversely affects
            the London interbank eurodollar market, or (2) compliance by Lender
            in good faith with any applicable law or governmental regulation,
            guideline or order or interpretation or change thereof by any
            governmental authority charged with the interpretation or
            administration thereof or with any request or directive of any such
            governmental authority (whether or not having the force of law); or
<PAGE>
 
                                     -23-

            (B) the Adjusted Libor Rate shall no longer represent the effective
            cost to Lender for U.S. dollar deposits in the London interbank
            eurodollar market for deposits in which it regularly participates;

then, and in any such event, Lender shall forthwith so notify Borrower thereof.
Until Lender notifies Borrower that the circumstances giving rise to such notice
no longer apply, the obligation of Lender to allow selection by Borrower of the
Type of Loan affected by the contingencies described in this Section (herein
called "Affected Loans") shall be suspended. If at the time Lender so notifies
        ---------------                                                       
Borrower, Borrower have previously given Lender a Notice of Borrowing or
Conversion with respect to one or more Affected Loans but such Loans have not
yet gone into effect, such notification shall be deemed to be void and Borrower
may borrow Loans of a non-affected Type by giving a substitute Notice of
Borrowing or Conversion pursuant to Section 2.5 hereof. Upon such date as shall
be specified in such notice (which shall not be earlier than the date such
notice is given), Borrower shall, with respect to the outstanding Affected
Loans, prepay the same, together with interest thereon and any amounts required
to be paid pursuant to Section 2.14 hereof, and may borrow a Loan of another
Type in the same amount as the Affected Loan in accordance with Section 2.1(a)
hereof by giving a Notice of Borrowing or Conversion pursuant to Section 2.5
hereof; and

  (b) Increased Costs. In case any change in law, regulation, treaty or official
      ---------------                                                           
      directive or the interpretation or application thereof by any court or by
      any governmental authority charged with the administration thereof or the
      compliance with any guideline or request of any central bank or other
      governmental authority (whether or not having the force of law):

      (i)  subjects Lender to any tax with respect to payments of principal or
      interest or any other amounts payable hereunder or otherwise with respect
      to the transactions contemplated hereby (except for taxes on the overall
      net income of Lender imposed by the United States of America or any
      political subdivision thereof); or

      (ii)  imposes, modifies or deems applicable any deposit insurance,
      reserve, special deposit or similar requirement against assets held by, or
      deposits in or for the account of, or loans by, Lender (other than such
      requirements as are already included in the determination of the Adjusted
      Libor Rate); or

      (iii) imposes upon Lender any other condition with respect to its
      performance under this Agreement;

  and the result of any of the foregoing is to increase the cost to Lender,
  reduce the income receivable by Lender or impose any expense upon Lender with
  respect to any Loans, Lender shall notify Borrower thereof. Borrower agree to
  pay to Lender, within
<PAGE>
 
                                     -24-

  thirty (30) days after receipt of such notice, the amount of such increase in
  cost, reduction in income or additional expense as and when such cost,
  reduction or expense is incurred or determined, upon presentation by Lender of
  a statement in the amount and setting forth Lender's calculation thereof,
  which statement shall be deemed presumptively true and correct absent manifest
  error.

  (c) Capital Adequacy. If, after the date hereof, Lender shall have determined
      ----------------                                                         
  that the adoption of any applicable law, rule, regulation, guideline,
  directive or request (whether or not having the force of law) regarding
  capital requirements for banks or bank holding companies, or any change
  therein or in the interpretation or administration thereof by any governmental
  authority, central bank or comparable agency charged with the interpretation
  or administration thereof, or compliance by Lender with any of the foregoing
  imposes or increases a requirement by Lender to allocate capital resources to
  Lender's commitment to make Loans hereunder which has or would have the effect
  of reducing the return on Lender's capital to a level below that which Lender
  could have achieved (taking into consideration Lender's then existing policies
  with respect to capital adequacy and assuming full utilization of Lender's
  capital) but for such adoption, change or compliance by any amount reasonably
  deemed by Lender to be material, then Lender may, at its option, and by notice
  to Borrower, request that Borrower, and Borrower agrees to, pay to Lender
  within thirty (30) days following receipt by Borrower of such notice, such
  additional amounts as are necessary to compensate Lender for such reduction.
  Any notice given by Lender to Borrower pursuant to this Section shall be
  accompanied by a certificate setting forth the nature of the occurrence giving
  rise to such compensation, the additional amount or amounts to be paid to it
  hereunder and the method by which such amounts were determined. In determining
  such amount, Lender may use any reasonable averaging and attribution methods.
  Such certificate and the determinations set forth therein shall be
  presumptively true and correct in the absence of manifest error.

       Section 2.14 Funding Losses. If (a) all or any portion of a Libor Loan is
                    --------------                                              
repaid or converted to a Prime Rate Loan for any reason, other than as a result
of an event described in Section 2.13 hereof, including, without limitation,
pursuant to Sections 2.2(b), 2.10 or 2.11 hereof, on any day other than the last
day of the Interest Period applicable thereto, (b) any Libor Loan is not made as
a result of Borrower having withdrawn its Notice of Borrowing or Conversion, (c)
any Prime Rate Loan is not converted into a Libor Loan as a result of Borrower
having withdrawn its request for a conversion, or (d) any Libor Loan is not
continued as a result of Borrower having withdrawn its request for a
continuance, then, upon presentation by Lender of a statement setting forth the
amount and Lender's calculation thereof, Borrower shall also pay to Lender, as
liquidated damages and not as a penalty, such amount as may be necessary to
compensate Lender for any losses (including lost margins), costs and expenses
resulting therefrom by reason of the liquidation or redeployment of deposits or
other funds acquired by Lender to fund or maintain such Libor Loan.
<PAGE>
 
                                     -25-

       Section 2.15 Savings Clause. All agreements with respect to the Loans are
                    --------------                                              
hereby expressly limited so that in no contingency or event whatsoever, whether
by reason of acceleration of maturity of the Loans or otherwise, shall the
amount paid or agreed to be paid for the use, forbearance or retention of the
Loans (hereinafter referred to in this Section as "interest") exceed the maximum
permissible charge or rate under applicable law (the "Maximum Rate"). As used
                                                      --------------         
herein, the term "applicable law" shall mean the law in effect as of the date
hereof, provided, however, that in the event there is a change in the law which
results in a higher permissible rate of interest, then this Agreement shall be
governed by such new law as of its effective date. In this regard, Borrower and
Lender expressly stipulate that it is their respective intents in the execution,
delivery and acceptance of this Agreement to contract in strict compliance with
the laws of The Commonwealth of Massachusetts without regard to its conflicts of
law rules from time to time in effect. If, from any circumstance whatsoever,
fulfillment of any provision of this Agreement or the other Loan Documents, or
any other agreement between Borrower and Lender at the time performance of such
provision shall be due, shall involve exceeding the limit allowed by law, then
the obligation to be fulfilled shall automatically be reduced to said limit. If
from any circumstances Lender should ever receive as interest an amount or
amounts which would cause it to exceed the Maximum Rate, such amount which would
be excessive interest shall be applied to the reduction of the principal balance
of the Loans and not to the payment of interest. This provision shall control
every other provision of all instruments and agreements executed by Borrower in
connection with this Agreement.

       Section 2.16 Taxes. Any and all payments by Borrower hereunder shall be
                    -----                                                     
made, in accordance with Section 2.7, free and clear of and without deduction
for any and all present or future taxes, levies, imposts, deductions, charges or
withholdings, and all liabilities with respect thereto, excluding taxes imposed
                                                        ---------              
on the net income of Lender and franchise taxes imposed on Lender. In addition,
Borrower agrees to pay any present or future stamp or documentary taxes or any
other excise or property taxes, charges or similar levies which arise from any
payment made hereunder or from the execution, delivery or registration of, or
otherwise with respect to, this Agreement or any other Loan Document.

       Section 2.17. Special Provisions Relating To Letters of Credit.
                     ------------------------------------------------ 

   2.17.1. Requests for Letters of Credit. Whenever Borrower desires to obtain a
           ------------------------------                                       
   Letter of Credit, Borrower shall submit to Lender a letter of credit
   application, in form and substance satisfactory to Lender no later than three
   (3) Business Days prior to the proposed date of issuance of the Letter of
   Credit.

   2.17.2. Payment of Reimbursement Obligations. Notwithstanding any provisions
           ------------------------------------ 
   to the contrary in any Reimbursement Agreement, Borrower agrees to reimburse
   Lender for any drawings (whether partial or full) under each Letter of Credit
   and to pay to Lender the amount of all other Reimbursement Obligations and
   other amounts
<PAGE>
 
                                     -26-

   payable to Lender under or in connection with such Letter of Credit
   immediately when due, irrespective of any claim, set-off, defense or other
   right which Borrower may have at any time against Lender or any other Person;
   and

   2.17.3. Indemnification. In addition to amounts payable as elsewhere provided
           ---------------
   in this Agreement, Borrower agrees to protect, indemnify, pay and save Lender
   harmless from and against any and all claims, demands, liabilities, damages,
   losses, costs, charges and expenses (including reasonable attorneys' fees)
   which Lender may incur or be subject to as a consequence, directly or
   indirectly, of

     (a) the issuance of any Letter of Credit, other than as a result of the
     gross negligence or willful misconduct of Lender, as determined by a court
     of competent jurisdiction; or

     (b) the failure of Lender to honor a drawing under any Letter of Credit as
     a result of any act or omission, whether rightful or wrongful, of any
     present or future de jure or de facto governmental authority (all such acts
                       -- ----    -- ----- 
     or omissions being hereinafter referred to collectively as "Government
                                                                 ----------
     Acts").
     ----
  2.17.4. Assumption of Risk by Borrower. As between Borrower and Lender,
          ------------------------------ 
  Borrower assumes all risks of the acts and omissions of, or misuse of any of
  the Letters of Credit by, the respective beneficiaries of such Letters of
  Credit. In furtherance and not in limitation of the foregoing, subject to the
  provisions of the applications for the issuance of Letters of Credit, Lender
  shall not be responsible for:

     (a) the form, validity, sufficiency, accuracy, genuineness or legal effect
     of any document submitted by any Person in connection with the application
     for and issuance of and presentation of drafts with respect to any of the
     Letters of Credit, even if it should prove to be, in any or all respects,
     invalid, insufficient, inaccurate, fraudulent or forged;

     (b) the validity or sufficiency of any instrument transferring or assigning
     or purporting to transfer or assign any Letter of Credit or the rights or
     benefits thereunder or proceeds thereof, in whole or in part, which may
     prove to be invalid or ineffective for any reason;

     (c) the failure of the beneficiary of any Letter of Credit to comply duly
     with the conditions required in order to draw upon such Letter of Credit
     but only to the extent waived by Borrower where such failure results in
     damages to Borrower;

     (d) errors, omissions, interruptions or delays in transmission or delivery
     of any messages, by mail, cable, telegraph, telex or otherwise, whether or
     not they be in cipher;
<PAGE>
 
                                     -27-

     (e) errors in interpretation of technical terms other than those resulting
     from gross negligence or willful misconduct;

     (f) any loss or delay in the transmission or otherwise of any document
     required in order to make a drawing under any Letter of Credit or of the
     proceeds thereof;

     (g) the misapplication by the beneficiary of any Letter of Credit of the
     proceeds of any drawing under such Letter of Credit; or

     (h) any consequences arising from causes beyond the control of Lender,
     including, without limitation, any Government Acts.

  None of the foregoing shall affect, impair or prevent the vesting of any of
  Lender's rights or powers under this Section.

  2.17.5. Cash Collateral. If, notwithstanding the provisions of Section 2.1(b)
          ---------------                                                      
  hereof, any Letter of Credit is outstanding on the Revolving Credit
  Termination Date (each, a "Post-Termination Letter of Credit"), then on or
  prior to the Revolving Credit Termination Date, Borrower shall, promptly on
  demand by Lender, deposit with Lender Cash Collateral with respect to each
  Post-Termination Letter of Credit then outstanding. In the event that any
  amount of Cash Collateral remains after the expiration of all Post-Termination
  Letters of Credit, so long as no Obligation which is then due and payable is
  outstanding on such date, Lender shall return such amount promptly to
  Borrower.

                                  ARTICLE III

                                  CONDITIONS
                                  ----------

       Section 3.1 Closing Conditions. It shall be a condition precedent to
                   ------------------                                      
Lender's obligation to close and fund the initial Loan, or consider applications
for the initial Letter of Credit, hereunder that each of the following
conditions be satisfied in full, as determined by Lender, unless waived or
deferred by Lender in writing at or prior to the closing and funding of the
initial Loan hereunder:

  3.1.1 Executed Loan Documents. Each of the Loan Documents shall have been
        -----------------------                                            
  executed and delivered to Lender in form, content and manner of execution and
  delivery satisfactory to Lender and its counsel.

  3.1.2 No Material Change. No material adverse change shall have occurred in
        ------------------
the financial condition, business, affairs, operations or control of Borrower,
or Borrower and its Subsidiaries or their respective businesses taken as a
whole, since the date of the audited financial statements referred to in Section
4.7 hereof.
<PAGE>
 
                                     -28-

  3.1.3 Warranties and Representations Accurate. All warranties and
        ---------------------------------------                    
  representations made by or on behalf of Borrower or any of its Subsidiaries to
  Lender under the Loan Documents, shall be true, accurate and complete in all
  material respects and shall not have omitted any material fact necessary to
  make the same not misleading.

  3.1.4 Financials. Lender shall have received the financial statements for
        ----------                                                         
  Borrower and its Subsidiaries for the periods referenced in Section 4.7 of
  this Agreement, and for the month ending September 30, 1998;

  3.1.5 Validity and Sufficiency of Collateral Documents. Lender shall have
        ------------------------------------------------                   
  received evidence satisfactory to Lender of the perfection of the liens and
  security interests in the Collateral including evidence that each of the UCC
  Financing Statements has been filed.

  3.1.6 No Other Liens; Taxes and Municipal Charges Current. Lender shall have
        ---------------------------------------------------                   
  received the results of lien searches showing no liens or encumbrances on the
  Collateral, whether inferior or superior to Lender's liens on the Collateral,
  except in respect of: (a) real estate taxes, personal property taxes and other
  municipal charges not yet due and payable; and (b) Permitted Liens.

  3.1.7 Condition of Collateral. There shall have been no material unrepaired or
        -----------------------                                                 
  unrestored damage or destruction by fire or otherwise to any property
  comprising, or intended to comprise, the Collateral.

  3.1.8 Insurance. Borrower shall have provided to Lender with respect to the
        ---------                                                            
  Collateral evidence of: (i) insurance coverages which meet the insurance
  requirements set forth in Section 5.9 hereof to the satisfaction of Lender;
  and, if requested, (ii) payment of the premiums for such insurance, to the
  extent then due and payable.

  3.1.9 Organizational Documents and Entity Agreements. Lender shall have
        ----------------------------------------------
  received with respect to Borrower and its Subsidiaries and any other Obligor,
  other than an individual (i) a copy of the formation document on file with
  the governmental office of the jurisdiction of its organization certified by
  an authorized official of such office, and a legal existence and good standing
  issued by such official; (ii) a copy of the by-laws or other governing
  documents certified by the clerk or other official keeper of company records
  authorized to give such certification; and (iii) legal existence and good
  standing certificates for each jurisdiction, if any, in which Borrower and any
  of its Subsidiaries and any other Obligor is required by applicable law to
  have registered as a foreign entity to do business in such jurisdiction;

  3.1.10 Votes, Consents and Authorizations. Lender shall have received and
         ----------------------------------                                
  approved copies of all votes, consents and authorizations, certified by the
  clerk or other official keeper of company records authorized to give such
  certification, as may
<PAGE>
 
                                     -29-

  be reasonably required to evidence authority for: (i) the execution and
  delivery of each of the Loan Documents and the transactions contemplated
  thereby; and (ii) providing continuing authorization to designated persons to
  deal in all respects on behalf of Borrower hereunder or in connection with the
  transactions contemplated hereby;

  3.1.11 Legal and Other Opinions. Lender shall have received and approved legal
         ------------------------                                               
  opinion letters from counsel representing Borrower and any Obligors, including
  without limitation, an opinion from each of Borrower's counsel and the UK
  Subsidiary's UK counsel, which meet Lender's reasonable legal opinion
  requirements, and each of the foregoing Persons hereby directs its counsel to
  deliver such legal opinion letters;

  3.1.12 No Default. There shall not exist any Default or Event of Default under
         ----------                                                             
  any of the Loan Documents.

  3.1.13 Closing Certificate. Lender shall have received a certificate executed
         -------------------
  by an authorized representative of Borrower certifying that (i) all financial
  information furnished by or on behalf of Borrower to Lender is accurate and
  correct in all material respects as of the reporting date(s) thereof and that
  there have been no material adverse changes since the reporting date(s)
  thereof; (ii) to Borrower's actual knowledge, neither Borrower nor any of its
  Subsidiaries is in default under any material obligation or agreement to which
  it is a party or by which it or any of its properties are bound; and (iii)
  except as set forth on Exhibit 4.5 hereto, there is no material litigation
                         -----------
  pending or, to the best of Borrower's knowledge, after due inquiry,
  threatened, against Borrower or any of its Subsidiaries, or any of their
  respective assets.

  3.1.14 Other Documents and Information Lender shall have received and approved
         -------------------------------                                        
  such other documents, instruments, agreements, and information as Lender shall
  reasonably request in connection with the transactions contemplated hereby,
  including such other documents, instruments, agreements, and information as
  Lender reasonably determines are necessary at any time to perfect any of
  Lender's liens and security interests in the Collateral.

  3.1.15 Proceedings,  Etc. No action, proceeding, investigation, regulation or
         -----------------                                                     
  legislation shall have been instituted, threatened or proposed before any
  court, governmental agency or legislative body to enjoin, restrain or
  prohibit, or to obtain damages in respect of, or which is related to or arises
  out of this Agreement or the consummation of the transactions contemplated
  hereby and thereby or which, in Lender's good faith judgment, would make it
  inadvisable to consummate the transactions contemplated by this Agreement or
  any of the other Loan Documents.
<PAGE>
 
                                     -30-


  3.1.16  Payment of Lender's Counsel's Fees and Costs. Borrower shall have paid
          --------------------------------------------                          
  all fees due and payable to Lender and its counsel incurred in connection with
  this Agreement and the other Loan Documents.

     3.2 Conditions Precedent to All Loans. The obligation of Lender to make
         ---------------------------------                                  
each Loan, and to consider applications for Letters of Credit, including the
initial Loan and any initial applications for Letters of Credit, is further
subject to the following conditions:

  (a)  the representations and warranties contained in Article IV shall be true
  and accurate in all material respects on and as of the effective date of each
  Loan or Letter of Credit as though made at and as of each such date (except to
  the extent that such representations and warranties expressly relate to an
  earlier date), and no Default or Event of Default shall have occurred and be
  continuing, or would result from such Loan or Letter of Credit;

  (b)  the resolutions referred to in Section 3.1.10 shall remain in full force
  and effect;

  (c)  no change shall have occurred in any law or regulation or interpretation
  thereof that, in the opinion of counsel for Lender, would make it illegal or
  against the policy of any governmental agency or authority for Lender to make
  Loans hereunder; and

  (d)  Borrower shall have provided Lender with each of the items set forth in
  any "post-closing" side letter dated the date hereof within thirty (30) days
  of the date hereof, or such other time as may be set forth in such letter.
  Unless waived in writing by Lender, Borrower's failure to fully satisfy each
  of the conditions subsequent set forth in said letter within the aforesaid
  time periods, shall constitute a Default under Section 8.1(c) of this
  Agreement.

     The making of each Loan and issuance of each Letter of Credit shall be
deemed to be a representation and warranty by Borrower on the date of such Loan
or Letter of Credit as to the accuracy of the facts referred to in subsection
(a) of this Section 3.2.

                                  ARTICLE IV

                   BORROWER'S REPRESENTATIONS AND WARRANTIES
                   -----------------------------------------

     Borrower makes the representations and warranties set forth below to induce
Lender to make Loans, issue Letters of Credit, and to enter into this Agreement
and the transactions contemplated hereby, with the understanding that Lender is
relying thereon:

     Section 4.1 Organization Borrower and each of its Subsidiaries is duly
                 ------------                                              
organized, validly existing and in good standing under the laws of the
jurisdiction of its organization, has the power and authority to own its
property and to carry on its business as now being conducted, and is duly
qualified to do business and is in good standing in all jurisdictions
<PAGE>
 
                                     -31-


except where the failure to be so qualified or in good standing, individually or
in the aggregate, could materially adversely affect the enforceability of any
material contract or the business, operations, financial condition or prospects
of Borrower, or Borrower and its Subsidiaries or their respective businesses
taken as a whole. The copies of Borrower's organizational documents and by-laws
furnished to Lender are true, complete and correct copies of such documents as
they exist on the date of this Agreement.

     Section 4.2 Authorization, No Violations. The execution, delivery and
                 ----------------------------                             
performance of this Agreement, the Note and the other Loan Documents by Borrower
or any of its Subsidiaries, as the case may be, are within the powers and
authority of Borrower and each such Subsidiary, have been duly authorized by
proper proceedings, and do not and will not contravene any provision of
applicable law or Borrower's or any of its Subsidiary's organizational documents
or governing documents or any amendment thereof or any indenture or agreement to
which Borrower or any of its Subsidiaries is a party or of any other indenture
or agreement or any order, regulation, ruling or requirement of a court or
public body or authority by which Borrower or any of its Subsidiaries is bound,
and will not result in, or require the creation or imposition of, any mortgage,
security interest or other lien or encumbrance on the property or revenues of
Borrower or any of its Subsidiaries. This Agreement, the Note and the other Loan
Documents to which Borrower or any of its Subsidiaries is a party have been
executed and delivered by Borrower and each such Subsidiary and constitute
legal, valid and binding obligations of Borrower and each such Subsidiary,
enforceable against Borrower and each such Subsidiary in accordance with their
respective terms.

     Section 4.3 Ownership; Subsidiaries. As of the date of this Agreement, all
                 -----------------------                                       
ownership interests in (i) Borrower and each of its Subsidiaries, (ii) any
entities which own an interest in the Borrower or any of its Subsidiaries, other
than any owners of publicly held stock of Borrower or any such entities
constituting less than a five percent (5%) interest therein) are identified on
Exhibit 4.3 hereto by name and percentage interest of each owner and all such
- -----------                                                                  
interests in Borrower have been fully paid for and are owned, free and clear of
all liens and encumbrances. As of the date of this Agreement, Borrower does not
have any Subsidiaries (directly or indirectly held) other than those shown on
Exhibit 4.3 hereto.
- -----------        

     Section 4.4 Governmental and Other Approvals. No approval, consent or
                 --------------------------------                         
authorization of, or any other action by, or filing or registration with, any
governmental department, agency or instrumentality, domestic or foreign, other
than which have been obtained, if any, is necessary for (i) the execution and
delivery of, and the performance of the obligations under, and the consummation
of the transactions contemplated by, this Agreement, the Note, the other Loan
Documents, by Borrower and any of its Subsidiaries party thereto, and (ii) the
borrowing of the Loans and the use of proceeds thereof and the incurring of the
Reimbursement Obligations.

     Section 4.5 Litigation. Except as set forth in Exhibit 4.5 hereto or as
                 ----------                         -----------             
otherwise disclosed in writing to Lender subsequent to the date of this
Agreement pursuant to
<PAGE>
 
                                     -32-


Section 5.3 hereof, there are no actions, suits, investigations or proceedings
pending or actually known to be threatened against or affecting Borrower or any
of its Subsidiaries, or any properties or rights of Borrower or any of its
Subsidiaries, by or before any court or administrative agency or regulatory
authority or agency or arbitration tribunal which reasonably could be expected
to have a material adverse effect on the operations, financial condition,
business or prospects of Borrower, or Borrower and its Subsidiaries or their
respective businesses taken as a whole, if adversely determined, nor is any
substantial basis for such litigation actually known by Borrower or any of its
Subsidiaries to exist.

     Section 4.6 Absence of Burdensome Contracts and Restrictions. None of
                 ------------------------------------------------         
Borrower nor any of its Subsidiaries is subject to any provision in its
organizational or governing documents, or any amendment thereof, or is a party
to or otherwise bound by any indenture or agreement or bound by any order,
regulation, ruling or requirement of a court or public body or authority which
will, under current or foreseeable conditions, materially adversely affect its
normal operations or impair its financial condition, business or prospects.

     Section 4.7 Financial Statements; No Undisclosed Liabilities; No Changes.
                 ------------------------------------------------------------ 
The audited consolidated financial statements of Borrower and its Subsidiaries
for the period ending June 30,1998 and the unaudited consolidated financial
statements of Borrower and its Subsidiaries for Borrower's fiscal quarter ending
September 30, 1998 (subject to normal year-end adjustments), heretofore
delivered to Lender, fairly and accurately present the financial condition, the
results of operations and changes in financial position of Borrower and its
Subsidiaries as of and for the fiscal year ending on such date and have been
prepared in accordance with GAAP applied on a basis consistently followed in all
material respects throughout the periods involved. Other than as set forth in
Exhibit 4.7 hereto, since the date of the audited financial statements referred
- -----------                                                                    
to above, there has been no material adverse change in the assets, liabilities,
financial condition, results of operations, business or prospects shown on such
financial statements as at and for the period ended on said date, except for
changes in the ordinary course of business consistent with past practices.

     Section 4.8 Licenses, Permits, Compliance with Law, Etc. Borrower and each
                 -------------------------------------------                   
of its Subsidiaries has all necessary licenses and permits and other rights to
allow it to conduct its business as presently conducted and, to the best of
Borrower's and its Subsidiaries' knowledge, is in compliance with all laws,
rules, orders and regulations applicable to the conduct of its business or its
properties.

     Section 4.9 Title to Properties and Assets. Borrower and each of its
                 ------------------------------                          
Subsidiaries has good and marketable title to its properties and assets,
including such properties and assets as are reflected in the financial
statements referred to in Section 4.7 hereof (except such assets as have been
disposed of in the ordinary course of business subsequent to the date thereof),
free and clear of any mortgage, lien, security interest or encumbrance, except
for Permitted Liens. Other than financing statements filed in connection with
any Permitted Lien, or Liens in favor of any existing lender evidencing
Indebtedness of Borrower or any of
<PAGE>
 
                                     -33-


its Subsidiaries satisfied in full with the proceeds of the initial Loan
hereunder, no financing statement under the Uniform Commercial Code which names
either Borrower or any of its Subsidiaries has been filed which has not been
terminated, and neither Borrower nor any of its Subsidiaries has signed any
financing statement or any security agreement authorizing any secured party
thereunder to file any such financing statement or security agreement which has
not been terminated, except in favor of Lender. Except as may be set forth in
Exhibit 4.9 hereto, Borrower (i) does not use any trade name in the conduct of
- -----------                                                                   
its business; (ii) has not changed its name; (iii) has not been the surviving
entity in a merger, or acquired any other Person or assets of a Person, other
than in the ordinary course of business, within the most recent twelve year
period immediately preceding the date of this Agreement.

     Section 4.10 Leases. Borrower and each of its Subsidiaries enjoys peaceful
                  ------                                                       
and undisturbed possession under all leases of real or personal property of
which Borrower or any of its Subsidiaries is lessee, none of which contains any
unusual or burdensome provision which will materially adversely affect the
normal operations of Borrower, or Borrower and its Subsidiaries or their
respective businesses taken as a whole. All such leases are valid, subsisting
and in full force and effect, and to the best of Borrower's and its
Subsidiaries' actual knowledge (i) there are no material uncured defaults of
Borrower or any of its Subsidiaries, or the lessors thereunder, (ii) no event
has occurred which with the passage of time or the giving of notice, or both,
would constitute a default thereunder, and (iii) there is no other reason why
the tenant under each such lease may not continue to occupy the leased premises,
including without limitation foreclosure upon the landlord's interest therein.

     Section 4.11 Patents; Trademarks, Etc. Borrower and each of its
                  ------------------------                          
Subsidiaries owns or possesses the right to use all the patents, trademarks,
service marks, trade names, copyrights and licenses, and rights with respect
thereto, necessary for the conduct of its business as now conducted and as
proposed to be conducted, without any actually known conflict with the rights of
others.

     Section 4.12 Tax Returns and Taxes. All federal, state and other taxes,
                  ---------------------                                     
assessments and other governmental charges upon Borrower and its Subsidiaries or
their respective properties which are due and payable or claimed to be due have
been paid to federal, state or local taxing authorities (including, without
limitation, taxes on properties, franchises, licenses, sales and payrolls). All
charges, accruals and reserves for taxes reflected in the balance sheets
referred to in Section 4.7 are adequate to cover the tax liabilities of Borrower
and its Subsidiaries as of the date(s) thereof. There are no tax liens upon any
of the properties of Borrower or any of its Subsidiaries. There are no pending
tax examinations nor have any tax claims been asserted by any taxing authority
against Borrower or any of its Subsidiaries other than as disclosed on Exhibit
                                                                       -------
4.12 or as otherwise disclosed in writing to Lender subsequent to the date of
- ----                                                                         
this Agreement pursuant to Section 5.3 hereof, nor to Borrower's or any of its
Subsidiaries' actual knowledge is there any basis for any such claim.
<PAGE>
 
                                     -34-


     Section 4.13 ERISA Matters. Borrower and each of its Subsidiaries has
                  -------------                                           
fulfilled its obligations, if any, under the minimum funding standards of ERISA
with respect to any ERISA plan maintained by Borrower and is otherwise in
compliance in all material respects with any provisions of ERISA applicable to
Borrower or any of its Subsidiaries.

     Section 4.14 No Default. No Default has occurred and to the best of
                  ----------                                            
Borrower's and its Subsidiaries' knowledge, neither Borrower nor any of its
Subsidiaries is in default under any instrument, contract or other agreement to
which Borrower or any of its Subsidiaries is a party or by which Borrower or any
of its Subsidiaries, or any their respective properties are bound, or with
respect to any order, judgment, writ, injunction, decree, award, regulation,
ruling or requirement of a court or a public body or authority by which Borrower
or any of its Subsidiaries, or any their respective properties are bound.

     Section 4.15 Margin Stock. Neither Borrower nor any of its Subsidiaries is
                  ------------                                                 
engaged principally, or as one of its important activities, in the business of
extending credit for the purpose of purchasing or carrying margin stock within
the meaning of Regulation U, T or X of the Board of Governors of the Federal
Reserve System. The execution, delivery and performance of this Agreement and
the other Loan Documents and the use of the proceeds of the Loans, or the
benefits of the Letters of Credit, by Borrower do not and will not constitute a
violation of said regulations.

     Section 4.16 Collateral Documents. The provisions of the Collateral
                  --------------------                                  
Documents are effective to create in favor of Lender legal, valid and
enforceable liens and security interests, to the extent permitted by applicable
law, in the Collateral described therein, and when the UCC Financing Statements
have been duly filed and/or recorded in accordance with the laws of the
applicable jurisdictions in which the Collateral is located, such liens and
security interests shall constitute fully perfected liens on and security
interests in all right, title and interest of Borrower in the Collateral covered
thereby prior to all other interests therein, other than and subject only to
Permitted Liens.

     Section 4.17 Disclosure. None of the representations and warranties
                  ----------                                            
contained in this Article IV or otherwise made in writing by or on behalf of
Borrower pursuant hereto, or in the financial statements referred to in Section
4.7, or in any other document, certificate or written statement furnished to
Lender by or on behalf of Borrower or any of its Subsidiaries in connection with
this Agreement or any other Loan Document contains any untrue statement of a
material fact or omits stating a material fact necessary to make the statements
contained herein or therein not misleading as of the date thereof. There is no
fact known to Borrower or any of its Subsidiaries which materially adversely
affects the business, assets, operations, or prospects of Borrower, or Borrower
and its Subsidiaries taken as a whole, or the financial position or results of
operation of Borrower, or Borrower and its Subsidiaries taken as a whole, which
is not disclosed herein, in the financial statements described in Section 4.7
hereof or in any other documents, certificates or written statements furnished
to Lender in connection with this Agreement.
<PAGE>
 
                                     -35-


     Section 4.18 Survival of Representations and Warranties All representations
                  ------------------------------------------
and warranties made by Borrower herein or made in any certificate delivered
hereunder shall survive each advance of proceeds of the Loans and issuance of
the Letters of Credit until payment in full of the Obligations.

     Section 4.19 Solvency. After giving effect to the transactions contemplated
                  --------                                                      
under the Loan Documents, Borrower and each of its Subsidiaries will be solvent,
will be able to pay its debts as they become due, and will have funds and
capital sufficient to carry on its business and all businesses in which it is
about to engage.

     Section 4.20 Year 2000. Borrower and each of its Subsidiaries have reviewed
                  ---------                                                     
the areas within their respective businesses and operations which could be
adversely affected by, and have developed or are developing a program to address
on a timely basis, the "Year 2000 Problem" (i.e., the risk that computer
applications used by Borrower and its Subsidiaries may be unable to recognize
and perform properly date-sensitive functions involving certain dates prior to
and any date on or after December 31, 1999), and have made related appropriate
inquiry of material suppliers and vendors. Based on such review and program,
Borrower and each of its Subsidiaries believes that the "Year 2000 Problem" will
not have a material adverse effect on Borrower, or Borrower and its Subsidiaries
or their respective businesses taken as a whole.. From time to time, at the
request of Lender, Borrower will provide to Lender such updated information or
documentation as is requested regarding the status of its efforts to address the
"Year 2000 Problem."

     Section 4.21 Statutory Indebtedness Restrictions Neither Borrower nor any
                  -----------------------------------                         
of its Subsidiaries is subject to regulation under the Public Utility Holding
Company Act of 1935, the Federal Power Act, the Interstate Commerce Act, or the
Investment company Act of 1940, or any other federal, state or local statute,
ordinance or regulation which limits its ability to incur indebtedness or its
ability to consummate the transactions contemplated hereby.

                                   ARTICLE V

                             AFFIRMATIVE COVENANTS
                             ---------------------

     Borrower covenants and agrees that, from the date hereof and so long as any
Obligation under this Agreement or the other Loan Documents is outstanding,
Borrower shall:

     Section 5.1 Information to be Furnished. Furnish, or cause to be furnished,
                 ---------------------------                                    
to Lender:

  (a)  Annual Financial Statements. As soon as available and not later than
       ---------------------------     
  ninety (90) days after the close of each fiscal year of Borrower, a
  consolidated balance sheet and
<PAGE>
 
                                     -36-


  the related consolidated statements of income, shareholders' equity and cash
  flow for such year, (including a comparison to the immediately preceding
  fiscal year of Borrower and a comparison to budget), together with a statement
  of Arthur Andersen LLP, or a firm of independent certified nationally
  recognized public accountants selected by Borrower and satisfactory to Lender
  ("Independent Auditor"), to the effect that such financial statements, in such
    ------------------- 
  firm's opinion, fairly present the financial condition of Borrower and its
  Subsidiaries, if any, as at the end of such fiscal year and the results of
  Borrower's consolidated operations and changes in financial position for such
  fiscal year in conformity with GAAP. Such report shall not be qualified or
  limited because of a restricted or limited examination by the Independent
  Auditor of any material portion of Borrower's or its Subsidiaries' respective
  records. Such financial statements shall also be accompanied by a statement by
  the Independent Auditor to the effect that based upon a review of this
  Agreement and the transactions and condition of Borrower and its Subsidiaries
  during the accounting period covered by such financial statements, the
  Independent Auditor is not aware of the occurrence or existence of any Default
  or Event of Default, or if the Independent Auditor is aware that any such
  Default or Event of Default that exists or has existed or any such event has
  occurred, the nature and duration thereof and what action has been taken or is
  proposed with respect thereto. Borrower shall also deliver to Lender within
  the time period specified in the first sentence of this Section 5.1(a) its
  unaudited consolidating balance sheet and the related unaudited statements of
  income, shareholders' equity and cash flow for such year;

  (b)  Quarterly and Monthly Financial Statements.
       ------------------------------------------ 

     (i)    As soon as available and not later than forty-five (45) days after
     the close of each fiscal quarter of Borrower, a consolidated and
     consolidating balance sheet of Borrower and its Subsidiaries as of the
     close of the period and the related consolidated and consolidating
     statements of income, cash flow, and shareholders' equity for the elapsed
     portion of the year through such quarter, (including a comparison to the
     immediately preceding fiscal year of Borrower and a comparison to budget),
     and accompanied by a certificate signed by the chief financial officer of
     Borrower (a) to the effect that such financial statements in such officer's
     opinion, subject to year-end adjustments, fairly present the financial
     condition of Borrower and its Subsidiaries, if any, as at the end of such
     quarter and the results of its operations and changes in financial position
     for the period covered thereby in conformity with GAAP, and (b) certifying
     to the matters referred to in the concluding sentence of Section 5.1(a)
     hereof;

     (ii)   As soon as available and not later than thirty (30) days after the
     close of each fiscal month of Borrower, a consolidated and consolidating
     balance sheet of Borrower and the Domestic Subsidiaries as of the close of
     the period and the related consolidated and consolidating statements of
     income, cash flow, and shareholders' equity for the elapsed portion of the
     year through such month,
<PAGE>
 
                                     -37-


     (including a comparison to the immediately preceding fiscal year of
     Borrower and, if requested by Lender, a comparison to budget);

  (c)  Covenant Compliance Certificate. Concurrently with the delivery of the
       -------------------------------                                       
  financial statements required by clauses (a) and (b)(i) above, a duly
  completed Covenant Compliance Certificate of Borrower as of the end of the
  period covered by such statements, signed by the chief financial officer of
  Borrower;

  (d)  Management/Audit Reports. Promptly after the receipt thereof by Borrower,
       ------------------------                                                 
  copies of any management letter given in connection with the financial
  statements prepared at the end of any fiscal year and copies of any detailed
  audit reports submitted to Borrower by independent accountants in connection
  with any interim review of Borrower's accounts and/or books and records, or
  any audit of Borrower;

  (e)  Borrowing Base Certificate and Collateral Reports.
       ------------------------------------------------- 

     (i)    Within fifteen (15) days of the end of each month in which Loans or
            Letters of Credit are outstanding, a Borrowing Base Certificate, and
            reports identifying all of Borrower's Accounts, such reports to be
            in form and substance satisfactory to Lender and in such detail as
            Lender shall request, including in any event, the aging and
            reconciliation of such Accounts showing the total amount due from
            each account debtor and the month in which each Account was created;

     (ii)   Concurrently with the delivery of the Covenant Compliance
            Certificate, the certificate regarding "Third-Party Collateral
            Locations," as defined in and required by, Section 3.11 of the
            Security Agreement executed by the Borrower in favor of the Lender
            contemporaneously with the execution of this Agreement;

  (f)  SEC Information. Promptly upon transmission thereof, copies of any
       ---------------  
  filings and registrations with, and reports to, the Securities and Exchange
  Commission, or any successor thereto, by Borrower or any of its Subsidiaries,
  and, to the extent not otherwise delivered to Lender pursuant to this
  Agreement, copies of all financial statements, proxy statements, notices and
  reports as Borrower or any of its Subsidiaries shall generally send to
  analysts or the holders of their capital stock, convertible or otherwise
  exchangeable preferred stock, or holders of any subordinated debt in their
  capacity as such holders; and

  (g)  Other. From time to time such other data and information bearing on the
       -----
  financial condition, results of operations and changes in financial position
  of Borrower or the Collateral as Lender may reasonably request.
<PAGE>
 
                                     -38-


      Section 5.2 Accounting Practices and Changes Keep books and records and
                  --------------------------------                           
prepare all financial statements required under Section 5.1 hereof in accordance
with GAAP consistently applied.

     Section 5.3 Notice Requirements. Notify Lender in writing, promptly after
                 -------------------                                          
any officer of Borrower or any of its Subsidiaries obtains actual knowledge
thereof and with full details, of:

  (a)  any contingent liability(ies) involving an amount in excess of $100,000 (
  a "Material Amount"), in the aggregate during any fiscal year, which is not
     ---------------                                                       
  covered by insurance;

  (b)  any litigation or arbitration or other proceeding pending or commenced
  before any court or administrative or regulatory agency or authority which by
  itself or taken together with other such litigation or proceedings involves a
  Material Amount not covered by insurance, or which, if adversely determined,
  would have a material adverse effect on the financial condition, assets,
  business or prospects of Borrower or any of its Subsidiaries, individually or
  in the aggregate;

  (c)  the acceleration of the maturity of any Indebtedness of Borrower or any
  of its Subsidiaries (whether or not disputed) in excess of a Material Amount;

  (d)  the occurrence of a material default under any material agreement or
  instrument to which Borrower or any of its Subsidiaries is a party or by
  which Borrower or any of its Subsidiaries is bound;

  (e)  any loss, destruction or diminution in the value of any Collateral or of
  other assets, whether or not covered by insurance, in excess of a Material
  Amount, in the aggregate during any fiscal year of Borrower, or if any event
  having a material adverse effect on any of the Collateral or the value or
  amount thereof in excess of a Material Amount occurs, including, in any event
  but without limitation, any request by an account debtor for credit or
  adjustment of an Account of Borrower; any discount, allowance or other
  adjustment by Borrower of the amount owing on an Account of Borrower not shown
  on the face of any invoice therefor; any dispute; and any other event
  affecting Accounts or the value or amount thereof;

  (f)  any notice of cancellation, nonrenewal received from, or given by
  Borrower to, any insurer, or any material change in coverage from that
  existing on the Closing Date;

  (g)  any attachment, levy, execution or other legal process levied against any
  property of Borrower or any of its Subsidiaries in excess of a Material
  Amount, in the aggregate during any fiscal year of Borrower;
<PAGE>
 
                                     -39-


  (h)  any bankruptcy or other insolvency proceeding of any account debtor owing
  an aggregate in excess of a Material Amount to Borrower and any return or
  adjustment, rejection, repossession or loss or damage of or to merchandise
  represented by the Accounts, and of any credit adjustment or dispute arising
  in connection with the goods or services represented by the Accounts, in each
  case, or in the aggregate during any fiscal year of Borrower, involving an
  amount in excess of a Material Amount;

  (i)  the occurrence of any reportable event (as defined in 4043 of ERISA),
  together with a statement of Borrower's president or treasurer as to the
  details thereof and a copy of its notice thereof to the Pension Benefit
  Guaranty Corporation;

  (j)  any known release occurring after the date of this Agreement, or likely
  threat of release, of Hazardous Materials from, on or onto any site owned or
  operated by Borrower or any of its Subsidiaries, or of any expense or loss in
  connection therewith, or the commencement of any investigation, action or the
  incurrence of any expense or loss by any governmental authority in connection
  with the containment or removal of any hazardous or toxic chemical, material
  or oil for which expense or loss Borrower or any of its Subsidiaries may be
  liable or potentially responsible;

  (k)  any change in (i) Borrower's legal name, (ii) the address of Borrower's
  chief executive office, (iii) the jurisdiction of Borrower's organization, or
  (iv) the location of any Collateral or Borrower's records with respect to
  Accounts; and

  (l)  the entering into by Borrower of any contract with the United States of
  America or any state, political subdivision, department, agency or
  instrumentality thereof which gives, or will give, rise to an Account of
  Borrower, which notice shall be accompanied by three (3) originals of an
  Assignment and Notice of Assignment, substantially in the form of Exhibit
                                                                    -------
  5.3(l) hereto, or such other form(s) as Lender may require, shall have been
  -----                                                                      
  completed and executed by Borrower.

     Section 5.4 Inspection. Permit Lender or Lender's officers, employees or
                 ----------                                                  
representatives to visit and inspect any of Borrower's and its Subsidiaries'
properties and to examine and make extracts from Borrower's and its
Subsidiaries' books and discuss the affairs, finances and accounts of Borrower
and its Subsidiaries with their respective officers, all at such reasonable
times and as often as Lender may reasonably request and, so long as no Event of
Default has occurred which is continuing, upon reasonable notice.

     Section 5.5 Type of Business. Remain engaged solely in (i) the lines of
                 ----------------                                           
business carried on by Borrower and its Subsidiaries on the Closing Date, and
(ii) other businesses or activities that are similar thereto or that constitute
an extension, development, or expansion thereof, or that are ancillary or
otherwise related thereto.

     Section 5.6 Legal Existence. Do or cause to be done all things necessary to
                 ---------------                                                
preserve and keep in full force and effect Borrower's and each of its
Subsidiaries'
<PAGE>
 
                                     -40-

existence, rights and franchises and to maintain in good standing Borrower's and
its Subsidiaries' legal existence and status as a foreign entity qualified to do
business in those jurisdictions where Borrower or any of its Subsidiaries is
required to be qualified and where failure to be so qualified could have a
material adverse effect on Borrower, or Borrower and its Subsidiaries or their
respective businesses taken as a whole..

     Section 5.7 Payment of Taxes and Claims. Pay each tax or other assessment
                 ---------------------------                                  
or governmental charge or levy imposed upon Borrower or any of its Subsidiaries
or their respective property prior to the time when any penalties or interest
(except interest during extensions of time for filing of tax returns) accrue
with respect thereto, as well as any lawful claim for labor, materials or
supplies which if unpaid might become a lien or charge upon Borrower's or any of
its Subsidiaries' respective properties or any part thereof, unless in each such
case, the same is being contested in good faith and an adequate reserve therefor
has been established and is maintained in accordance with GAAP; indemnify Lender
against and hold each harmless from any and all sales, use or value added taxes
imposed by the United States or any state, municipality or other jurisdiction in
connection with the Loans or the Collateral.

     Section 5.8 Maintenance of Properties. Maintain and keep the properties
                 -------------------------                                  
useful, or deemed by Borrower to be useful, in Borrower's and each of its
Subsidiary's businesses in good repair, working order and condition,
condemnation and casualty excepted (subject to any obligation to restore from
insurance proceeds and/or condemnation awards made available to Borrower), make
or cause to be made such repairs thereto and replacements thereof as shall be
appropriate to the effective conduct of Borrower's and its Subsidiaries'
businesses.

     Section 5.9 Maintenance of Insurance. Maintain insurance with financially
                 ------------------------                                     
sound and reputable insurers reasonably satisfactory to Lender against such
risks and in such amounts as is usually carried by owners of similar businesses
and properties in the same general areas in which Borrower and each of its
Subsidiaries operates, or as shall otherwise be reasonably satisfactory to
Lender; provide to Lender on the Closing Date and annually thereafter, an
endorsement naming Lender as additional insured or loss payee under a lender's
loss payable endorsement under all insurance policies maintained with respect to
the Collateral and providing for thirty (30) days prior notice to Lender of
cancellation or reduction in coverage; maintain in full force and effect public
liability insurance, in such amounts as are deemed prudent by Borrower and
reasonably acceptable to Lender, against claims for bodily injury, death or
physical property damage occurring upon, in, about or in connection with any
properties owned or controlled by Borrower or any of its Subsidiaries or through
the operation of any motor vehicles by Borrower's or any of its Subsidiaries'
agents or employees or arising in any manner out of the business carried on by
Borrower or any of its Subsidiaries; and, upon request by Lender, furnish to
Lender satisfactory evidence of all such insurance. In the event of failure by
Borrower to provide or maintain insurance as required herein, Lender may, at its
option,
<PAGE>
 
                                     -41-

provide such insurance and add the amount of the premium therefor to the amount
of the Loans.

     Section 5.10 Compliance With Law. Comply with the requirements of all
                  -------------------                                     
present and future applicable laws, rules, regulations and orders of any
governmental authority having jurisdiction over Borrower and its Subsidiaries
and/or Borrower's or its Subsidiaries' businesses and maintain in full force and
effect at all times all licenses and permits necessary to the operation of
Borrower's and its Subsidiaries' businesses, except where (i) the failure to
comply would not have a material adverse effect on Borrower or its Subsidiaries'
or their respective businesses, or (ii) Borrower or any of its Subsidiaries
shall have commenced action to contest any such law, rule, regulation or order
and thereafter is diligently pursuing such action to completion, provided that,
                                                                 -------- ---- 
Borrower's or its Subsidiaries' non-compliance therewith shall not have, or
result in, a material adverse effect on the Borrower, or the Borrower and its
Subsidiaries or their respective businesses taken as a whole.

     Section 5.11 Additional Subsidiaries. In the event that any Person becomes
                  -----------------------                                      
a Subsidiary after the Closing Date, Borrower will promptly notify Lender of
that fact and cause such Subsidiary to execute and deliver to Lender
substantially contemporaneously therewith a Subsidiary Guaranty together with a
legal opinion with respect thereto from counsel licensed to practice in the
jurisdiction of such Subsidiary's organization.

     Section 5.12 Further Assurances. At any time and from time to time, execute
                  ------------------                                            
and deliver such further instruments and take such further action as may
reasonably be requested by Lender to effect the purposes of this Agreement,
including, without limitation, the defense of the right, title and interests of
Lender in and to any of Lender's or any Obligor's rights in the Collateral
against, and the taking of any action necessary to remove, any liens or
encumbrances other than Permitted Liens.


                                  ARTICLE VI

                              NEGATIVE COVENANTS
                              ------------------

     Borrower further covenants and agrees that so long as this Agreement is in
effect or any Obligation remains outstanding, Borrower and each of its
Subsidiaries shall not:

     Section 6.1 Financial Covenants.
                 ------------------- 

  6.1.1     Minimum Quick Ratio Permit the ratio of (x) the sum of (i) Cash
            -------------------                                            
  Equivalents, and (ii) accounts receivable to (y) Current Liabilities to be
  less than (z) (i) for the period commencing with Borrower's fiscal quarter
  ending on or about September 30, 1998 and ending on the last day of Borrower's
  fiscal quarter ending on or about June 30, 1999, 1.00:1.00, and (ii) for each
  of Borrower's fiscal quarters
<PAGE>
 
                                     -42-

  ending thereafter, 1.10:1.00, calculated as of the last day of the relevant
  fiscal quarter on a consolidated basis.

  6.1.2     Minimum Profitability/Maximum Quarterly Losses Permit Net Income for
            ----------------------------------------------      
  each of Borrower's fiscal quarters ending on or about the dates identified
  below to be less (or more in the case of losses) than the amount specified for
  each such period:

     --------------------------------------------------------------
            FISCAL QUARTER                       MINIMUM/MAXIMUM
                ENDING                          AMOUNT PERMITTED
     --------------------------------------------------------------
                             
               9/30/98                            ($1,000,000)

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

              12/31/98                             ($250,000)

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

        3/31/99 and thereafter                        $1.00
 
     --------------------------------------------------------------
 
  6.1.3     Minimum Tangible Net Worth Permit the Tangible Net Worth of Borrower
            --------------------------
  and its Subsidiaries, calculated as of the last day of the relevant fiscal
  quarter on a consolidated basis, to be less than $8,000,000, plus, the sum of
                                                               ---- 
  (i) on a cumulative basis, 100% of Net Income for each fiscal quarter ending
  on or about September 30, 1998, without reduction for losses, and (ii) 100% of
  the net proceeds of (a) any issuance of equity interests in Borrower or any of
  its Subsidiaries, and (b) any conversion of subordinated debt to equity of
  Borrower or any of its Subsidiaries.

  6.1.4     Maximum Total Liabilities/Tangible Net Worth Permit the ratio of
            --------------------------------------------                    
  Borrower's consolidated Total Liabilities to consolidated Tangible Net Worth
  to be more than (i) for the period commencing with Borrower's fiscal quarter
  ending on or about September 30, 1998 and ending on the last day of Borrower's
  fiscal quarter ending on or about March 31, 1999, 1.40:1.00, and (ii) for each
  of Borrower's fiscal quarters ending thereafter, 1.25:1.00, calculated as of
  the last day of the relevant fiscal quarter on a consolidated basis.

     Section 6.2 Liens, Security Interests, Etc: Other than sales of inventory
                 ------------------------------                               
or grants of licenses and other rights in the ordinary course of Borrower's or
its Subsidiaries' business for cash or an open account and on terms of payment
ordinarily extended to its customers, sell, factor or borrow on the security of
the Collateral, or create, assume or permit to exist any security interest,
whether by mortgage, pledge, lien or other encumbrance, in Borrower's or its
Subsidiaries' real or personal property in favor of any Person other than
Lender, except for the following ("Permitted Liens"):
                                  ------------------ 
<PAGE>
 
                                     -43-

  (a) liens for taxes or assessments not yet delinquent or whose validity or
  amount is being contested in good faith by appropriate proceedings (unless and
  until foreclosure or any similar proceeding shall have been commenced) and for
  which adequate reserves have been established and maintained in accordance
  with GAAP;

  (b) landlords' non-consensual statutory or common law liens in respect of rent
  not in default on property located at such landlord's leased premises,
  provided that such liens have been waived or subordinated by such landlord in
  -------- ---- 
  writing in favor of Lender, in form and substance satisfactory to Lender;

  (c) liens in respect of (i) pledges or deposits under workers' compensation,
  unemployment insurance, social security laws, or similar legislation (other
  than ERISA), (ii) appeal and similar bonds incidental to litigation, (iii)
  mechanics', laborers' and materialmen's and similar liens, if the obligations
  secured by such liens are not then delinquent or, if delinquent and in dispute
  action shall have been commenced to have such lien bonded off or otherwise
  removed or discharged and thereafter such action is being pursued diligently
  to completion for a period not to exceed 30 days, and (iv) statutory
  obligations incidental to the conduct of Borrower's and its Subsidiaries'
  businesses that do not in the aggregate materially detract from the value of
  Borrower's and its Subsidiaries' property, or materially impair the use
  thereof in the operation of Borrower's and its Subsidiaries' businesses, in
  each case, as to Borrower, or Borrower and its Subsidiaries taken as a whole;

  (d) judgment liens that shall not have been in existence for a period longer
  than 30 days after the creation thereof, or if a stay of execution shall have
  been obtained, for a period longer than 30 days after the expiration of such
  stay provided that such periods shall be extended by an additional 30 days if,
       -------- ---- 
  within any such initial 30 day period, action shall have been commenced to
  have any such lien bonded off or otherwise removed or discharged or to obtain
  a stay of execution and thereafter such action is being pursued diligently to
  completion;

  (e) rights of lessors under capital leases and equipment leases; and

  (f) Liens in the UK Subsidiary's assets granted in favor of NatWest solely for
  the UK Subsidiary's obligations under the UK Subsidiary Loan Documents.
<PAGE>
 
                                     -44-

     Section 6.3 Indebtedness. Incur, assume or permit to exist Indebtedness
                 ------------                                               
(including, without limitation, Guarantees) to any Person other than Lender
(excluding, in any event, unsecured trade liabilities in the ordinary course of
Borrower's and its Subsidiaries' businesses not more than 60 days overdue)
except for the following permitted Indebtedness ("Permitted Indebtedness"):
                                                  ---------------------- 

  (a) existing Indebtedness approved by Lender and shown on Exhibit 6.3 hereto
                                                            -----------
  and any other existing Indebtedness reflected in the most recent financial
  statements delivered to Lender hereunder prior to the date of this Agreement;

  (b) Indebtedness which is secured by Permitted Liens;

  (c) Guarantees in favor of Lender;

  (d) Indebtedness of UK Subsidiary to NatWest under the UK Loan Documents,
  which so long as the Blue Wave Guaranty shall remain in effect, shall not
  exceed the US Dollar equivalent of $5,000,000; and

  (e) the Blue Wave Guaranty covering the Indebtedness permitted under Section
  6.3(d) above.

     Section 6.4 Merger; Consolidation; Sale or Lease of Assets. Liquidate,
                 ----------------------------------------------            
merge or consolidate or sell, lease or otherwise dispose of all or a substantial
portion of Borrower's or its Subsidiaries' assets, or any material asset of
Borrower or any of its Subsidiaries, or sell or assign Borrower's or it
Subsidiaries' Accounts, present or future, except for (i) mergers or
consolidations by Borrower with a wholly-owned Subsidiary of Borrower in which
Borrower is the surviving entity, (ii) a merger or a consolidation of a wholly-
owned Subsidiary of Borrower with another wholly-owned Subsidiary of Borrower,
and (iii) sales and assignments of UK Subsidiary's Accounts to NatWest under the
UK Subsidiary Loan Documents.

     Section 6.5 Sale and Leaseback. Sell or transfer any of Borrower's or its
                 ------------------                                           
Subsidiaries' properties to any Person with the intention of taking back a lease
of the same property or leasing other property for substantially the same use as
the property being sold or transferred.

     Section 6.6 Acquisitions; Investments. Enter into any transaction, or
                 -------------------------                                
series of related transactions, by which (i) Borrower or any of its Subsidiaries
acquires the business of, or all or substantially all of the assets of, any
Person other than a Subsidiary of Borrower, or any division of such Person,
located in a specific geographic area or areas, whether through the purchase of
assets, purchase of stock, merger or otherwise, or (ii) any Person that was not
theretofore a Subsidiary of Borrower becomes a Subsidiary of Borrower, or make
any Investment except Investments in Cash and Cash Equivalents.
<PAGE>
 
                                     -45-

     Section 6.7 ERISA. With respect to all employee benefit plans maintained by
                 -----                                                          
Borrower, if any: (a) engage in any "prohibited transaction" (as such term is
defined in 406 or 2003(a) of ERISA); (b) incur any "accumulated funding
deficiency" (as such term is defined in 302 of ERISA), whether or not waived, by
failing to pay to any such employee benefit plan any contribution which Borrower
is obligated to pay under the terms of such plan;(c) incur any withdrawal
liability with respect to any multiemployer plan which is not fully bonded; or
(d) terminate any such employee benefit plan in a manner which could result in
the imposition of a lien on any property of Borrower pursuant to 4068 of ERISA,
or allow or suffer to exist any occurrence of a reportable event" (as defined in
4043 of ERISA) or any other event or condition which presents a material risk of
termination by the Pension Benefit Guaranty Corporation of any such employee
benefit plan.

     Section 6.8 Equity Distributions. Declare or make any payment of any cash
                 --------------------                                         
dividend on or in respect of any ownership interest in Borrower; redeem,
purchase or otherwise acquire for cash any ownership interest in Borrower,
directly or indirectly; or make any other distribution of cash or other property
of Borrower on or in respect of any ownership interest in Borrower ("Equity
Distributions") other than (i) tax distributions attributable to income derived
from Borrower and payable by the shareholders or other owners of Borrower, and
(ii) dividends payable by any Subsidiary of Borrower, provided that in no event
                                                      -------------            
shall Borrower (i) make any Equity Distribution if an Event of Default has
occurred which is continuing or would occur after giving effect to any Equity
Distribution, or (ii) make any Equity Distribution in redemption, or purchase or
other acquisition of any shareholder's or other owner's interest.

     Section 6.9 Transactions With Affiliates. Engage in any transaction or
                 ----------------------------                              
enter into any agreement with, or on behalf of, any Person that, directly or
indirectly, through one or more intermediaries controls or is controlled by or
is under common control with Borrower, or is a director or officer of Borrower
(an "Affiliate"), except on any terms that are not materially less favorable to
Borrower than those that would have been obtained in a comparable transaction by
that Borrower with an unrelated Person. As used herein, "control" of a Person
means the possession, direct or indirect, of the power to vote 5% or more of the
voting stock or equivalent interests of such Person, or to direct or cause the
direction of the management and policies of such Person, whether through the
ownership of such voting stock or equivalent interests, by contract, or
otherwise.

     Section 6.10 Fiscal Year. Change the last day of its fiscal year from June
                  -----------                                                  
30, or the Saturday or Sunday closest thereto.

     Section 6.11 Bank Accounts. On and after April 15, 1999, maintain, directly
                  -------------                                                 
or indirectly, the Borrower's or any Domestic Subsidiary's primary operating
accounts with any bank or other financial institution other than Lender.

     Section 6.12. Change of Control; Changes in Capital Structure. Cause or
                   -----------------------------------------------          
permit the occurrence of any Change of Control or, without Lender's prior
written consent which shall
<PAGE>
 
                                     -46-

not unreasonably be withheld, any change in Borrower's capital structure other
than (i) issuances of stock options to the Borrower's employees, and (ii)
issuances of equity interests in the Borrower.

     Section 6.13. Subordinated Debt (a) Amend, modify or terminate any document
                   -----------------                                            
governing, evidencing or otherwise relating to any subordinated debt in any way
that creates any change that conflicts with any subordination agreement relating
thereto or this Agreement, or (b) make any payment under any instrument or
agreement evidencing any subordinated debt in a manner that is inconsistent with
the terms of the applicable subordination agreement.

                                  ARTICLE VII

                               POWER OF ATTORNEY

     For the purpose of exercising the rights and remedies of Lender under this
Agreement or any of the other Loan Documents, or at law or in equity, Borrower
hereby irrevocably constitutes and appoints Lender its true and lawful attorney-
in-fact, upon and following any Event of Default, to execute, acknowledge and
deliver any instruments and to do and perform any acts reasonably permitted
hereunder or by law in the name and on behalf of Borrower. The foregoing power
of attorney shall be deemed to be coupled with an interest and shall be
irrevocable. Notwithstanding any provision to the contrary elsewhere in this
Agreement or the other Loan Documents, Lender shall not have any duties or
responsibilities, except those expressly set forth herein and therein, or any
fiduciary relationship with Borrower and no implied covenants, functions,
responsibilities duties, obligations or liabilities shall be read into this
Agreement or the other Loan Documents or otherwise exist against Lender.

                                 ARTICLE VIII

                          EVENTS OF DEFAULT; REMEDIES
                          ---------------------------

     Section 8.1 Events of Default. If any of the following events (an "Event of
                 -----------------                                              
Default") shall occur:

  (a) Borrower shall fail to pay (i) any amount of principal of or interest on
  the Loans or the Reimbursement Obligations within two (2) Business Days after
  the date when due, or (ii) any fees, expenses or other amounts (other than
  amounts covered by subclause (i) hereof) owing at any time hereunder within
  ten (10) Business Days;

  (b) Borrower or any of its Subsidiaries shall fail to comply with any covenant
  contained in Sections 5.1 (and such failure shall not be remedied within five
  (5) Business Days after notice), 5.3, 5.4, 5.9, and 5.11 and Article VI);
<PAGE>
 
                                     -47-

  (c) Borrower or any of its Subsidiaries shall fail to perform or observe any
  term, covenant or agreement herein contained (other than those referred to in
  subsections 8.1(a) and (b) above) and such failure shall not be remedied
  within thirty (30) days after notice, or, if earlier, the date an officer of
  Borrower or any of its Subsidiaries obtains actual knowledge thereof;

  (d) an Event of Default under any of the other Loan Documents shall have
  occurred and all grace periods, if any, applicable thereto shall have expired;

  (e) any representation, warranty, statement, certificate, schedule or report
  made herein or in any other Loan Document or furnished hereunder shall prove
  to have been false or misleading in any material respect as of the time made
  or deemed to have been made or furnished;

  (f) (i) there shall have occurred the death, dissolution, termination of
  existence of, or the insolvency of, or the making of an assignment or trust
  mortgage for the benefit of creditors by, the Borrower or any of its
  Subsidiaries, or any Obligor, and, with respect to the death of any individual
  guarantor, a period of ninety (90) days after the date of such guarantor's
  death shall have expired, unless, within such ninety (90) day period, either
  (a) the estate of such guarantor lawfully acknowledges and assumes in writing
  all obligations and liability of such guarantor under any guaranty delivered
  by such guarantor, or (b) additional collateral or a substitute guaranty from
  a creditworthy individual or entity acceptable, and in form and substance
  satisfactory, to Lender, shall be provided to Lender in lieu thereof, or (ii)
  any Obligor shall have challenged the validity of any instrument or agreement
  evidencing such Obligor's obligations to Lender, or the enforceability of its
  obligations thereunder;

  (g) The Borrower or any of its Subsidiaries or any Obligor, shall (i) apply
  for or consent to the appointment of, or the taking of possession by, a
  receiver, custodian, trustee, liquidator or similar official of itself or of
  all or a substantial part of its property, (ii) be generally not paying its
  debts as such debts become due, (iii) make a general assignment for the
  benefit of its creditors, (iv) commence a voluntary case under the Federal
  Bankruptcy Code (as now or hereafter in effect), (v) take any action or
  commence any case or proceeding under any law relating to bankruptcy,
  insolvency, reorganization, winding-up or composition or adjustment of debts,
  or any other law providing for the relief of debtors, (vi) fail to contest in
  a timely or appropriate manner, or acquiesce in writing to, any petition filed
  against it in an involuntary case under such Bankruptcy Code or other law,
  (vii) take any action under the laws of its jurisdiction of incorporation or
  organization similar to any of the foregoing, or (viii) take any corporate
  action for the purpose of effecting any of the foregoing;

  (h) A proceeding or case shall be commenced, without the application or
  consent of the Borrower or any of its Subsidiaries or any Obligor, in any
  court of competent jurisdiction, seeking (i) the liquidation, reorganization,
  dissolution, winding up, or
<PAGE>
 
                                     -48-

  composition or readjustment of its debts, (ii) the appointment of a trustee,
  receiver, custodian, liquidator or the like of it or of all or any substantial
  part of its assets, or (iii) similar relief in respect of it, under any law
  relating to bankruptcy, insolvency, reorganization, winding-up or composition
  or adjustment of debts or any other law providing for the relief of debtors,
  and such proceeding or case shall continue undismissed, or unstayed and in
  effect, for a period of sixty (60) days; or an order for relief shall be
  entered in an involuntary case under such Bankruptcy Code, against the
  Borrower or any of its Subsidiaries, or any Obligor, or action under the laws
  of the jurisdiction of incorporation or organization of the Borrower or any of
  its Subsidiaries or any Obligor, similar to any of the foregoing shall be
  taken with respect to the Borrower or any of its Subsidiaries or any Obligor;

  (i) Borrower or any of its Subsidiaries or any Obligor shall fail to pay when
  due, or within any applicable period of grace, Indebtedness exceeding $100,000
  in the aggregate for any such Person, or shall fail to observe any provision
  of any note, bond, debenture or similar instrument or security evidencing any
  such Indebtedness, or any agreement relating thereto, beyond any period of
  grace provided with respect thereto;

  (j) an entry of judgment or award against Borrower or any of its Subsidiaries
  or any Obligor shall be made (i) which exceeds $100,000 in the aggregate
  outstanding at any time for any such Person (ii) which has been in force more
  than 60 days (or, if the applicable appeal period is shorter, for such shorter
  period) or on which execution has been levied, (iii) in respect of which
  Borrower or any of its Subsidiaries or such Obligor shall not at the time in
  good faith be prosecuting an appeal or proceedings for review and in respect
  of which no stay of execution shall have been obtained pending such appeal or
  review, and (iv) a judgment or award shall have arisen out of liabilities not
  fully covered by insurance as to which the insurer shall have acknowledged in
  writing that full coverage (subject to any deductibles applicable thereto)
  exists with respect to such judgment or award;

  (k) an entry shall be made by any court or administrative agency of a final
  order requiring Borrower or any of its Subsidiaries or any Obligor, to divest
  itself of a substantial part of its assets and, as a consequence thereof, the
  ability of Borrower or any of its Subsidiaries or such Obligor to pay its
  indebtedness hereunder when due and payable is or may reasonably be expected
  to be materially adversely affected;

  (l) there shall have occurred the loss, theft, damage or destruction of any
  Collateral or other property of the Borrower or any of its Subsidiaries having
  a value in excess of a Material Amount for which there is either no insurance
  coverage or for which, in the reasonable opinion of Lender, there is
  insufficient insurance coverage, or any levy, seizure or attachment upon any
  of the Collateral or other property of Borrower having a value in excess of a
  Material Amount by any third party shall have been made;
<PAGE>
 
                                     -49-

   (m) a Change of Control shall have occurred;

   (n) Any Borrower or any of its Subsidiaries or any ERISA Affiliate shall fail
   to pay when due any amount which it shall have become liable to pay to the
   Pension Benefit Guaranty Corporation ("PBGC") or to a Plan under Title IV of
   ERISA; or notice of intent to terminate a Plan or Plans shall be filed under
   Title IV of ERISA by Borrower or any of its Subsidiaries, any ERISA
   Affiliate, any plan administrator or any combination of the foregoing; or the
   PBGC shall institute proceedings under Title IV of ERISA to terminate or to
   cause a trustee to be appointed to administer any such Plan or Plans or a
   proceeding shall be instituted by a fiduciary of any such Plan or Plans
   against Borrower or any of its Subsidiaries or any ERISA Affiliate and such
   proceedings shall not have been dismissed within 30 days thereafter; or a
   condition shall exist by reason of which the PBGC would be entitled to obtain
   a decree adjudicating that any such Plan or Plans must be terminated;

   (o) an event of default under the UK Subsidiary Loan Documents or any other
   instrument or agreement with, or in favor of, NatWest executed by the UK
   Subsidiary, whether substantially contemporaneously therewith, or subsequent
   thereto, including, without limitation, any instrument or agreement executed
   in connection with any refinancing of the obligations of the UK Subsidiary
   thereunder, each as amended, restated, substituted or otherwise modified or
   replaced from time to time, shall have occurred and be continuing; or

   (p) a material adverse change in the business, assets, or financial condition
   of Borrower, or Borrower and its Subsidiaries taken as a whole, shall have
   occurred.

     Section 8.2 Remedies Upon Default. Upon the occurrence of an Event of
                 ---------------------                                    
Default described in subsections 8.1(g) or (h) above, immediately and
automatically, and upon the occurrence of any other Event of Default, at any
time thereafter while such Event of Default is continuing, Lender may by notice
to Borrower terminate the unused portion of the Revolving Credit Commitment,
whereupon:

   (a) Lender's commitment to make any further Loans shall terminate;

   (b) the unpaid principal amount of the Loans together with accrued interest
   and all other Obligations shall become immediately due and payable without
   presentment, demand, protest or notice of any kind, all of which are hereby
   expressly waived; and

   (c) Lender may exercise any and all rights it has under this Agreement or any
   of the other Loan Documents, or at law or in equity, and proceed to protect
   and enforce Lender's rights by any action at law, in equity or other
   appropriate proceeding.

     Section 8.3 Remedies Cumulative. No right, power or remedy conferred upon
                 -------------------                                          
Lender hereby or by under this Agreement or any of the other Loan Documents, or
at law or
<PAGE>
 
                                     -50-

in equity, shall be exclusive of any other right, power or remedy referred to
herein or therein or now or hereafter available at law, in equity, by statute or
otherwise.

                                  ARTICLE IX

                                PARTICIPATIONS
                                --------------

     Section 9.1 Participations. Lender may without the consent of the Borrower
                 --------------                                                
sell participations to one or more banks or other entities (each, a
"Participant") in all or a portion of its rights and obligations under this
Agreement (including all or a portion of the Loans); provided, that (i) Lender's
                                                     --------                   
obligation under this Agreement shall remain unchanged, (ii) Lender shall remain
solely responsible to the other parties hereto for the performance of such
obligations, (iii) the Participant shall be entitled to the benefit of the cost
protection provisions contained in Section 2.13 hereof to the same extent as if
it were a Lender, provided that Borrower shall not be required to reimburse any
                  --------                                                     
Participant pursuant to Section 2.13 hereof in an amount which exceeds the
amount that would have been payable thereunder to Lender had Lender not sold
such participation, (iv) Borrower shall continue to deal solely and directly
with Lender in connection with Lender's rights and obligations under this
Agreement, and Lender shall retain the sole right to enforce the obligations of
Borrower relating to the Loans and to approve any amendment, modification or
waiver of any provision of the Agreement (provided that the Participant may be
                                          --------                            
provided with the right to approve amendments, modifications or waivers
affecting it with respect to (A) any decrease in the fees payable hereunder with
respect to Loans in which the Participant has purchased a participation, (B) any
change in the amount of principal of, or decrease in the rate at which interest
is payable, on the Loans, in which the Participant has purchased a
participation, (C) any extension of the dates fixed for scheduled payments of
principal of or interest on the Loans in which the Participant has purchased a
participation or, (D) any release of all or substantially all the Collateral,
and (v) the Participant shall have no right to sell participations in all or a
portion of its participation rights in respect of this Agreement.

     Section 9.2 Disclosure. Lender may, in connection with any assignment or
                 ----------                                                  
participation or proposed assignment or participation pursuant to this Article
IX disclose to any prospective participant and all Participants any information
relating to Borrower furnished to Lender by or on behalf of Borrower.

     Section 9.3 Assignments to Federal Reserve Bank. Lender may at any time
                 -----------------------------------                        
pledge or assign all or any portion of its rights under this Agreement and the
Note to a Federal Reserve Bank organized under the Federal Reserve Act, 12
U.S.C. (S)341, or any successor statute thereto, provided that no such
                                                 -------------        
assignment shall release Lender from any of its obligations hereunder.

     Section 9.4 No Assignment by Borrowers. No Borrower shall assign or
                 --------------------------                             
delegate any of its rights or obligations hereunder and any such assignment
shall be void.
<PAGE>
 
                                     -51-


                                   ARTICLE X

                                    GENERAL
                                    -------

     Section 10.1 Set-Off. Any deposits or other sums at any time credited by or
                  -------                                                       
due from Lender or any Participant to Borrower and any securities or other
property of Borrower in the possession of Lender or a Participant shall at all
times be held and treated as collateral security for the payment of the
Obligations. Regardless of the adequacy of any collateral, any such deposits or
other sums may be applied to or set off against Obligations at any time if
Borrower is primarily liable thereon, or at or after the maturity thereof if
Borrower is secondarily liable thereon. Borrower irrevocably invites each
financing institution which may consider becoming a Participant to rely on the
provisions of this Section 10.1 as making the Participant a creditor of Borrower
and agrees that its becoming a Participant shall constitute an acceptance of the
offer hereby made. Any and all rights to require Lender to exercise its rights
or remedies with respect to any other collateral which secures the Loans, prior
to exercising its right of setoff with respect to such deposits, credits or
other property of Borrower, are hereby knowingly, voluntarily and irrevocably
waived.

     Section 10.2 Amendments and Waivers. Neither this Agreement nor any
                  ----------------------                                
provision hereof shall be amended, modified, waived, discharged, nor any non-
compliance therewith deemed to have been consented to, orally or by course of
conduct, but only by a written agreement signed by an authorized officer of
Lender, as to amendments, as also signed by an authorized officer of Borrower.
Any such waiver or consent shall be effective only in the specific instance and
for the purpose for which given. No notice or demand on Borrower in any case
shall entitle Borrower to any other or further notice or demand in similar or
other circumstances or constitute a waiver of any right of Lender to take action
without notice or demand. No failure or delay on the part of Lender in
exercising any right hereunder shall operate as a waiver thereof or of any other
right, nor shall any single or partial exercise thereof preclude any other or
further exercise thereof or of any other right or remedy.

     Section 10.3 Notices. Except as otherwise provided herein, all notices and
                  -------                                                      
other communications in connection with this Agreement or any of the other Loan
Documents, shall be in writing, and shall have been duly given and be effective
(i) when delivered, (ii) the third Business Day following the day on which the
same is sent by certified or registered mail, postage prepaid, return receipt
requested, or (iii) when sent by facsimile transmission (provided a copy of such
facsimile transmission is also sent by first-class mail concurrently with such
transmission), in each case addressed to the respective parties at the address
set forth below, or at such other address as such party may specify by written
notice to the other parties hereto, provided, however, that failure to provide a
copy of any notice given hereunder to counsel to any party shall not affect the
validity of any notice given to any party hereunder:
<PAGE>
 
                                     -52-

If to Borrower:

     Blue Wave Systems Inc.
     2410 Luna Road
     Carrollton, TX 75006
        Attn:       Charles Brockenbush, Chief Financial Officer
        Telephone:  (972) 277-4609
        Telecopier: (972) 277-4666
 
with copies to:
 
Crouch & Hallett, L.L.P.
717 North Harwood Street, Suite 1400
Dallas, TX 75201
        Attn:       Bruce H. Hallett, Esquire
        Telephone:  (214) 953-0053
        Telecopier: (214) 953-3154
 
If to Lender:
 
     Fleet National Bank
     High Technology Group, 7th Floor, MA OF DO7A
     One Federal Street
     Boston, Massachusetts 02110
        Telecopier: (617) 346-0151
        Attn:
                    Frank H. Benesh, III, Vice President
                    Telephone:       (617) 346-0617
                    Andrew C. Wigren, Portfolio Manager
                    Telephone:       (617) 346-0071
 
with a copy to:
 
     Hinckley, Allen & Snyder
     28 State Street
     Boston, Massachusetts 02109-1775
        Attn:       Paula K. Andrews, Esquire
        Telephone:  (617) 345-9000
        Telecopier: (617) 345-9020

     Section 10.4 Waivers and Assents. Borrower waives notice of acceptance of
                  -------------------                                         
this Agreement, the Note and the other Loan Documents, notice of loans made,
credit extended, Collateral received, delivered or repossessed or other action
taken in reliance
<PAGE>
 
                                     -53-

hereon. With respect to both Obligations and Collateral, Borrower assents to any
extension or postponement of the time of payment or any other indulgence, to any
substitution, exchange or release of Collateral, to the addition or release of
any party or person primarily or secondarily liable, to the acceptance of
partial payments thereon and the settlement, compromising or adjusting of any
thereof, all in such manner and at such time or times as Lender may deem
advisable.

     Section 10.5 Marshaling. Lender shall not be required to marshal any
                  ----------                                             
present or future security for, or guaranties of, the Obligations, or to resort
to such security or guaranties in any particular order. To the extent that it
lawfully may, Borrower hereby waives any right, now or hereafter existing, to
require Lender to proceed against or exhaust all or any portion of any
collateral at any time securing the Obligations, or to marshal any assets, and
without limiting the generality of the foregoing, expressly agrees that Lender
may exercise its rights with respect to any collateral without resorting or
regard to other collateral or sources of reimbursement for Obligations. In the
event Lender seeks to take possession of any Collateral by court process, to the
extent permitted by applicable law, Borrower hereby irrevocably waives any
requirement for a bond or surety or security relating thereto under any statute,
court rule or otherwise as an incident to such possession, and waives any demand
for possession prior to the commencement of any suit or action to recover with
respect thereto.

     Section 10.6 Expenses. Borrower shall pay or reimburse Lender on demand for
                  --------                                                      
all expenses and costs (including, without limitation, reasonable attorneys'
fees and audit/examination fees) incurred or paid by Lender in connection with
the negotiation, preparation, review, execution or delivery of this Agreement
(whether or not the transactions contemplated hereby shall be consummated), the
other Loan Documents, or advice, interpretation, or other representation in
connection with any of the Loan Documents, any intercreditor agreements relating
to the Loans, and any amendments hereof or thereof or waivers or consents with
respect thereto; the making of the Loans; the perfection of any lien or security
interest; the administration or verification of any collateral; the enforcement
(including any arbitration, suit or other proceeding) of any obligation of the
Borrower or any Obligor; the satisfaction of any indebtedness under this
Agreement or the other Loan Documents; or the collection, administration,
verification, supervision, protection or realization upon or liquidation of any
collateral or any lien or security interest therein or with respect to any
obligation of any Obligor to Lender; and without limiting the foregoing any such
expenses incurred by Lender in connection with proceedings under a bankruptcy
petition filed by or against the Borrower or any of its Subsidiaries or any
Obligor.

     Section 10.7 Indemnification. Borrower agrees to indemnify, defend, and to
                  ---------------                                              
hold Lender harmless from and against any liability, claim, demand, expense, or
loss made against Lender on account of, or arising out of, this Agreement and
the transactions contemplated hereby, the reliance upon loan requests submitted
by Borrower and any other action taken by Lender hereunder or under any of the
other Loan Documents or any other agreement with Borrower and/or any other
Person except with respect to any such liability,
<PAGE>
 
                                     -54-
 
claim, demand, expense, or loss resulting solely from Lender's gross negligence
or willful misconduct.

     Section 10.8 Sealed Instrument; Successors and Assigns. This Agreement is
                  -----------------------------------------                   
intended to take effect as a sealed instrument, shall be binding upon and inure
to the benefit of Lender and Borrower and their respective successors and
assigns, except that Borrower not may assign or transfer its rights hereunder.

     Section 10.9 Governing Law. This Agreement and the other Loan Documents
                  -------------                                             
shall be deemed to be contracts under the laws of The Commonwealth of
Massachusetts, without regard to its conflicts of law rules, provided, however,
that if any collateral for the Obligations shall be' located in any jurisdiction
other than The Commonwealth of Massachusetts, the laws of such jurisdiction
shall govern the method, manner and procedure for foreclosure of Lender's liens
and security interests in such collateral and the enforcement of Lender's other
remedies in respect of such collateral to the extent the laws of such
jurisdiction are different from or inconsistent with the laws of The
Commonwealth of Massachusetts. Borrower hereby consents and submits to the
jurisdiction of the Superior Court of Suffolk County in The Commonwealth of
Massachusetts or, at Lender's discretion, the United States District Court for
the District of Massachusetts, as well as to the jurisdiction of all courts to
which an appeal may be taken or other review sought from the aforesaid courts,
for the purpose of any suit, action or other proceeding arising out of any of
the Obligations under or with respect to this Agreement or any other Loan
Document or any matter relating thereto, expressly waives any and all objections
it may have as to venue in any of such courts and personal service of the
summons or complaint or other process in any such action or suit, agrees that
service of process may be made by mailing a copy of the summons to Borrower at
their address for notices hereunder, and consents to the granting of such legal
or equitable relief as is deemed appropriate by any such court.

     Section 10.10 Provisions Severable. The provisions of this Agreement are
                   --------------------                                      
severable, and if any of these provisions shall be held by any court of
competent jurisdiction to be unenforceable, such holding shall not affect or
impair any other provision hereof, or, to the extent not invalidated, the effect
of said unenforceable provisions in other jurisdictions.

     Section 10.11 Rights and Remedies Cumulative. The rights and remedies set
                   ------------------------------                             
forth herein are cumulative and not exclusive of any other right which Lender or
any subsequent holder or holders of the Note would otherwise have.

     Section 10.12 Captions. The captions in this Agreement are for convenience
                   --------                                                    
of reference only and shall not be construed so as to define or limit the
provisions of this Agreement.
<PAGE>
 
                                     -55-

     Section 10.13 Counterparts. This Agreement may be executed in several
                   ------------                                           
counterparts, each of which when so executed and delivered shall be deemed an
original but all of which together shall constitute but one Agreement.

     Section 10.14 Term of Agreement. This Agreement shall continue in full
                   -----------------                                       
force and effect so long as Lender has any commitment to make Loans hereunder or
any Loan or any other Obligation hereunder shall be outstanding.

     Section 10.15 Integration; Ambiguities. This Agreement and the other Loan
                   ------------------------                                   
Documents represent the agreement of Borrower and Lender with respect to the
subject matter hereof, and there are no promises, undertakings, representations
or warranties by Lender relative to the subject matter hereof not expressly set
forth or referred to herein or in the other Loan Documents. Borrower
acknowledges that it and its counsel have reviewed and negotiated this Agreement
and the other Loan Documents and Borrower agrees that any rule of construction
to the effect that ambiguities are to be resolved against the drafting party
shall not be applied in construing this Agreement or the other Loan Documents.

     Section 10.16 JURY WAIVER. TO THE EXTENT PERMITTED BY APPLICABLE LAW
                   -----------                                           
BORROWER AND LENDER TOGETHER WITH THEIR RESPECTIVE SUCCESSORS AND ASSIGNS WAIVE
THEIR RESPECTIVE RIGHTS TO TRIAL BY JURY WITH RESPECT TO ANY ACTION, SUIT,
PROCEEDING, OR COUNTERCLAIM OF ANY KIND ARISING OUT OF OR RELATING TO THIS
AGREEMENT OR ANY OF THE LOAN DOCUMENTS, THE COLLATERAL OR THE OBLIGATIONS, OR
ANY COURSE OF CONDUCT, COURSE OF DEALINGS, STATEMENTS (WHETHER VERBAL OR
WRITTEN) OR ACTIONS OF ANY PARTY, AND AGREE NOT TO SEEK TO CONSOLIDATE ANY SUCH
ACTION WITH ANY OTHER ACTION IN WHICH A JURY TRIAL CANNOT BE OR HAS NOT BEEN
WAIVED. BORROWER REPRESENTS THAT IT HAS REVIEWED THE FOREGOING WAIVER WITH ITS
LEGAL COUNSEL AND HAS KNOWINGLY AND VOLUNTARILY WAIVED ITS JURY TRIAL RIGHTS
FOLLOWING CONSULTATION WITH ITS LEGAL COUNSEL, AND AGREES THAT IN THE EVENT OF
LITIGATION THIS AGREEMENT MAY BE FILED AS A WRITTEN CONSENT TO A TRIAL BY THE
COURT WITHOUT A JURY. BORROWER ACKNOWLEDGES THAT LENDER HAS NOT AGREED, OR
REPRESENTED THAT THE PROVISIONS OF THIS WAIVER WILL NOT BE FULLY ENFORCED IN ALL
INSTANCES.



                     [THIS SPACE INTENTIONALLY LEFT BLANK]
<PAGE>
 
                                     -56-

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as an instrument under seal as of the day and year first written
above.

                                        BORROWER:
 
WITNESSED:                              BLUE WAVE SYSTEMS INC.

                                           /s/ Charles Brockenbush
_____________________________           By:_____________________________
                                           Charles Brockenbush
                                           Vice President-Finance and
                                           Chief Financial Officer


_____________________________ 
        Print Name

                                        LENDER:

WITNESSED:                              FLEET NATIONAL BANK
 
                                           /s/ Frank H. Benesh
_____________________________           By:_____________________________
                                           Frank H. Benesh, III
                                           Vice President



_____________________________ 
        Print Name
 
 

<PAGE>
 
                                                                    Exhibit 10.2

                               Corporate Banking
                                       Services



                           Advice of Borrowing Terms
                                      for
                           Blue Wave Systems Limited



                                     From:
                      Leicester Corporate Business Centre


                               16 December 1998





                                    NatWest
<PAGE>
 
                           Advice of Borrowing Terms
                                        
Relationship Office: Leicester Corporate Business Centre  Date: 16 December 1998
 
                    Borrower(s)                  Registered Number:
             Blue Wave Systems Limited                1751065
                                        

We intend that the facilities listed in Part 1 of the attached Facility Schedule
(the "on-demand facilities") should remain available to the borrower(s) until 16
June 1999 and all facilities should be reviewed on or before that date.  The
facilities are, however, subject to the following:-

 .  the terms and conditions below,

 .  the specific conditions applicable to an individual facility as detailed in
   the Facility Schedule,

 .  the Security detailed in the attached Security Schedule, and

 .  the attached General Terms.

All amounts outstanding are repayable on demand which may be made by us at our
discretion at any time and the facilities may be withdrawn, reduced, made
subject to further conditions or otherwise varied by us giving notice in
writing.


Conditions:
The following conditions must be satisfied at all times while the facilities are
outstanding, but this will not affect our right to demand repayment at any time:
 .  Monthly management accounts to be provided to us within 28 days of the end of
   the month to which they relate
 .  Audited accounts to be provided to us within 180 days of the financial year
   end to which they relate.
 .  Month end overdraft utilisation to be covered 100% by a lending formula of
   the following in total;
1. 50% of month end eligible debtors 90 days or under. Eligible
   debtors are defined as those domiciled in Blue Wave Systems Ltd for UK and
   Export customers, excluding those to associated companies.
2. 50% of month end net finished stock. Net finished stock is defined as to
   total finished stock net of that not sold in the previous 6 months.
3. 30% of month end net WIP. Net WIP is defined as to total WIP less provision.
 .  Receipt of (Pounds)1,000,000 cash injection from Blue Wave Systems Inc. by
   10.1.99.



Other Fees and Costs
The following fees are due, in addition to the specific Arrangement Fee(s)
detailed in the Facility Schedule:

- --------------------------------------------------------------------------------
   Fee Type            Amount      Account to be debited     Date to be debited
- --------------------------------------------------------------------------------
Arrangement Fee     (Pounds)2,500         89286669                31.12.98
- --------------------------------------------------------------------------------

                                       2
<PAGE>
 
A T Dunlop
Corporate Manager
For and on behalf of
National Westminster Bank Plc



Acceptance:
To signify your agreement to the terms and conditions outlined above please sign
and return the enclosed copy of this Advice of Borrowing Terms within 28 days.


                              Form of Acceptance
                              ------------------
                                        

I accept the facility/facilities on the above terms and conditions and confirm
that I have been authorised by the Board(s) of Directors of the Borrower(s) to
sign this Form of Acceptance on behalf of the Borrower(s).



By (name and title): .....................                Date 22 December 1998.

For and on behalf of: Blue Wave Systems Limited

                                       3
<PAGE>
 
                               Facility Schedule

Part 1 - Facilities Repayable on Demand:

                              ------------------
                              Composite Facility
- --------------------------------------------------------------------------------
Name of Borrower(s):   Blue Wave Systems Limited
- --------------------------------------------------------------------------------
                       
Limit:  Gross          (Pounds)1,000,000 plus      Total between sterling and 
                       excess                      currency borrowing as 
                       (Pounds)1,000,000 to        detailed below. 
                       10.1.99
- ------------------------------------------------
Limit:  Net            (Pounds)1,000,000 plus
                       excess
                       (Pounds)1,000,000 to 
                       10.1.99
- --------------------------------------------------------------------------------

The following Facilities are included within the Composite Facility Limit
arrangement, together with any allocated sub-limit(s):

                            ----------------------
                            Overdraft: - Base rate
- --------------------------------------------------------------------------------
Account Number:             89286669
- --------------------------------------------------------------------------------
Name of Borrower            Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit:                      (Pounds)1,000,000 plus excess (Pounds)1,000,000 to
                            10.1.99
- --------------------------------------------------------------------------------
Purpose:                    To finance working capital
- --------------------------------------------------------------------------------
Repayment:                  Fully fluctuating with excess repayment from Blue 
                            Wave Systems Inc
- --------------------------------------------------------------------------------
1st Debit Interest Rate:    1.75% above the Bank's Base rate
- --------------------------------------------------------------------------------
2nd Debit Interest Rate:    The Bank's unarranged borrowing rate on borrowing
                            over (Pounds)2,000,000, reducing to
                            (Pounds)1,000,000 upon excess repayment or in excess
                            of agreed facilities
- --------------------------------------------------------------------------------
Interest Payable:           Quarterly
- --------------------------------------------------------------------------------
Monitoring Fee:             (Pounds)1,250  per quarter will be debited on 
                            31.12.98 and quarterly thereafter
- --------------------------------------------------------------------------------
Excess Fees:                We will be entitled to charge an excess fee at the
                            Bank's published rate for each day any agreed limit
                            is exceeded (see our "Services & Charges for
                            Business Customers" brochure for details).
- --------------------------------------------------------------------------------


                             ---------------------
                             Overdraft: - Currency
- --------------------------------------------------------------------------------
Account Number:             02559846            Currency:             US Dollars
- --------------------------------------------------------------------------------
Name of Borrower            Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit:                      (Pounds)1,000,000 plus excess (Pounds)1,000,000 
                            until 10.1.99 ( sterling equivalent )
- --------------------------------------------------------------------------------
Purpose:                    To finance working capital
- --------------------------------------------------------------------------------
Repayment:                  Fully fluctuating with excess repayment from 
                            Blue Wave Systems Inc.
- --------------------------------------------------------------------------------
1st Debit Interest Rate:    1.75% above the Bank's Currency Base rate.
- --------------------------------------------------------------------------------
2nd Debit Interest Rate:    We will be entitled to charge the Bank's unarranged
                            borrowing rate for the relevant currency for
                            borrowing over $3,200,000 reducing to $1,600,000 
                            upon excess repayment or in excess of agreed
                            facilities
- --------------------------------------------------------------------------------
Interest Payable:           Quarterly
- --------------------------------------------------------------------------------
Excess Fees:                We will be entitled to charge an excess fee at the
                            Bank's published rate for each day any agreed limit
                            is exceeded.
- --------------------------------------------------------------------------------

                                       4
<PAGE>
 
         ------------------------------------------------------------


Facilities not subject to a Composite Facility Limit:

                            ----------------------
                            Terminable Indemnities
- --------------------------------------------------------------------------------
Name of Borrower:      Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit:                 (Pounds)100,000
- --------------------------------------------------------------------------------
Type and Purpose:      Guarantee to H M Customs and Excise for the deferment of
                       import duty
- --------------------------------------------------------------------------------
Basis of Expiry:       7 days notice
- --------------------------------------------------------------------------------
Indemnity Fee:         1% p.a. payable quarterly in advance, to be debited to
                       account number 89286669 on pre-advised dates
- --------------------------------------------------------------------------------


                            ----------------------
                            Terminable Indemnities
- --------------------------------------------------------------------------------
Name of Borrower:      Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit:                 (Pounds)50,000
- --------------------------------------------------------------------------------
Type and Purpose:      A T A Carnets
- --------------------------------------------------------------------------------
Basis of Expiry:       31 months after issue or upon release by Chamber of
                       Commerce
- --------------------------------------------------------------------------------
Indemnity Fee:         1% p.a., minimum (Pounds)75 p a each payable quarterly in
                       advance, to be debited to account number 89286669 on
                       31.12.98 and quarterly thereafter
- --------------------------------------------------------------------------------


                              -------------------
                              Cheque Negotiations
- --------------------------------------------------------------------------------
Name of Borrower:      Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit:                 (Pounds)20,000
- --------------------------------------------------------------------------------
Purpose:               Negotiation of Foreign Cheques with Recourse
- --------------------------------------------------------------------------------
Fees:                  Subject to separate tariff, calculated on sterling value
                       of cheque. Information available upon request or at the
                       time the service is provided
- --------------------------------------------------------------------------------


                               ----------------
                               Forward Exchange
- --------------------------------------------------------------------------------
Name of Borrower:      Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Notional Limit:        (Pounds)300,000 gross contracts of 12 months or under
                       where utilisation is calculated in accordance with the
                       Bank's Forward Exchange Matrix from time to time, a copy
                       of which is available from your Corporate Manager.
- --------------------------------------------------------------------------------


                                ---------------
                                Settlement Risk
- --------------------------------------------------------------------------------
Name of Borrower:      Blue Wave Systems Limited
- --------------------------------------------------------------------------------
Limit/Frequency:       (Pounds) 275,000  per month
- --------------------------------------------------------------------------------
Type and Purpose:      Payments made via BACS
- --------------------------------------------------------------------------------

                                       5
<PAGE>
 
Part 2 - Facilities Subject to Separate Documentation:

The following facilities are made available on the terms of the separate
documentation between us.

    Name of Borrower        Facility and Purpose       Amount     Date Agreement
                                                      (Pounds)         Signed
- --------------------------------------------------------------------------------
Blue Wave Systems Limited      Corporate Cards        315,000      November 1996
- --------------------------------------------------------------------------------

                                       6
<PAGE>
 
                               Security Schedule
                                        
We rely on the security detailed below (and require additional security where
specified) to repay, on demand, all your current and future liabilities (both
actual and contingent) to us.  These liabilities include, without limitation,
those incurred by you under the facility(ies) specified in the Facility
Schedule.


Date Executed/New:          Security:                Given/to be given by:
- --------------------------------------------------------------------------------
24.8.94                 Mortgage Debenture        Given by the Borrower
- --------------------------------------------------------------------------------
11.11.98                Guarantee                 Given by Blue Wave Systems Inc
- --------------------------------------------------------------------------------

                                       7
<PAGE>
 
                                 General Terms

- --------------------------------------------------------------------------------
This section sets out in more detail the basis on which we make facilities
available to you. It covers issues such as how limits and interest are
calculated, how we can vary agreed terms and what we mean by "on demand".
- --------------------------------------------------------------------------------

These General Terms apply to all on demand facilities in the Advice of Borrowing
Terms (the "AOBT"), but do not apply to those facilities which are subject to
separate documentation, unless such documentation expressly incorporates these
General Terms.  In cases where the expression "you" includes more than one
person (for example joint account holders) it shall be taken to refer to all or
any one or more of you, and your obligations shall be joint and several.

 .  Independent Advice. Unless we expressly agree in writing to do so we do not
   hold ourselves out as providing advice on or considering the general
   suitability of facilities for your particular circumstances (including tax)
   and neither we nor our employees shall be liable for any indications given as
   to such suitability. We make no warranties or representations about the
   advisability of any underlying transaction entered into by you. You should
   obtain independent professional advice on such matters, and upon any security
   or guarantee required by us.

 .  Acceptance. Any offer of a facility must be accepted within the time period
   specified in the AOBT. We may, at our option, treat any usage of any of these
   facilities as acceptance (without amendment) of the terms and conditions of
   the AOBT.

 .  Availability. Our normal practice is to review all credit facilities
   periodically. Any references in the AOBT to a review of, or availability
   until a future date are merely indicative of our current intention, and we
   may, at our discretion, review on demand facilities at an earlier date.
   Facilities which are not loans or overdrafts are offered on the basis that
   there is no commitment on our part to enter into any such facility with you.
   We may, at our absolute discretion, decide whether a utilisation may be made
   and any conditions subject to which utilisations may be made.

 .  Repayment. Notwithstanding any reference to review or availability or
   repayment term in the AOBT, all facilities are repayable on demand which we
   may make at our sole discretion at any time and may by notice be withdrawn
   reduced or made subject to (further) conditions or otherwise varied. You must
   ensure that we receive by way of repayment, the full amount of any
   indebtedness irrespective of any taxes, duties or charges, in immediately
   available funds in the currency in which the facility is outstanding at the
   branch or office where the facilities are provided.

 .  Variation and waiver. We may vary these General Terms by giving one month's
   written notice to you. If a change in any currency of the United Kingdom
   occurs (including introduction of the euro), the AOBT and these General Terms
   will be amended to the extent we specify to reflect the change in currency
   and put us in the same position, so far as possible, that we would have been
   in if no change in currency had occurred. If we refrain from exercising any
   of our rights this shall not preclude us from exercising any rights at a
   later date.

 .  Limits. The limits specified in the AOBT or the Facility Schedule for each
   facility and/or each account (including any Group or Composite Facility
   limits) must not at any time be exceeded. In addition, the aggregate
   utilisation of any Composite and/or Group Limit specified for any group of
   accounts and/or facilities must not be exceeded notwithstanding the total of
   any individual or sub limits allocated. If we have agreed that there will be
   a gross limit for one or more facilities, this means that the aggregate
   utilisation of those facilities must not at any time exceed the gross limit.
   If we have agreed that there will be a net limit for one or more facilities,
   this means that the aggregate utilisation of those facilities, less the
   aggregate amount of the cleared credit balances on the accounts specified by
   us in the AOBT, will not exceed the net limit (if no accounts are specified
   we may determine which accounts are utilised for this purpose). We are not
   obliged to allow or continue to allow any borrowing in excess of agreed
   facilities. Any reference to a particular account will include any successor
   account.

 .  Interest. All interest rates are variable. Interest is payable monthly or
   quarterly (as detailed in the AOBT) on our usual charging days and on final
   repayment of the indebtedness. Interest accrues on the daily cleared debit
   balance on the account(s) concerned at the annual rate or rates shown in the
   AOBT (both before and after demand and/or judgement). It is calculated on the
   basis of a 365 day year for sterling (and either a 365 or 360 day year for
   currencies other than sterling or on such other basis as we may from time to
   time specify) and the actual number of days elapsed and is compounded monthly
   or quarterly. Our variable unarranged borrowing rate for the relevant
   currency will apply to any indebtedness from time to time (i) in excess of
   agreed facilities or (ii) outstanding after the expiry date of agreed
   facilities or, in respect of (i) only, such other interest rate as we may
   specify.

 .  Changes to interest. We may alter the basis on which interest is calculated
   including the size of the interest margin charged over our Base Rate or other
   published rate and/or the amount of any regular repayments of facilities
   which are repayable on demand by providing you with one month's written
   notice. As a change in our Base Rate or other variable rate is not an
   alteration of the basis upon which interest is calculated, no written notice
   need be given of such a change. Changes in our Base Rate or other published
   rates take effect when made. Details of current rates are available from any
   branch or office, and are published in selected national newspapers. Omission
   to publish details of any change in a newspaper shall not stop the change
   from taking effect. For a currency account, written notice of changes to the
   relevant Currency Base Rate will normally be given, although failure to do so
   will not stop the change taking effect when made.

 .  Fees. Fees quoted exclude charges for money transmission or similar services
   which are either advised (i) separately, or (ii) at the time a facility is
   used. All costs, charges and expenses incurred or suffered by us, including
   legal costs and our internal management costs, arising at any time in
   connection with any facility or with any related security or guarantee are
   payable by you on demand.

 .  Uncovered Payments. An "uncovered payment" is a payment where the cleared
   credit balance or agreed credit facility is insufficient to meet that payment
   and all other payments requested, disregarding uncleared credits to that
   account. We do not accept any obligation to make uncovered payments to third
   parties unless we have agreed to do so in writing. We need not make any
   uncovered payment which is in excess of any settlement risk limit.

 .  Set Off. We may, without notice, set-off against any credit balances on any
   of your account(s) (in any currency), your liability in respect of any
   facilities (including any uncovered payment) and may combine accounts. We are
   authorised to use all or any such credit balances to buy such other
   currencies as may be necessary in order to exercise any rights of set-off to
   which we may be entitled.

 .  Appropriation and Lien. Where more than one debt is owing to us we may use
   the whole or any part of any repayment to reduce or discharge the principal
   amount of your indebtedness as we may select, to meet any accrued interest or
   to discharge any other liabilities to us. We shall

                                       8
<PAGE>
 
   have a lien over securities of any kind and other items deposited by or on
   your behalf with us (including, without limitation, cheques given to us for
   collection).

 .  Security. Unless the AOBT expressly provides otherwise, any mortgage, charge
   or debenture must be a first legal mortgage, charge or debenture over the
   unencumbered title of the property in question. You may not grant (or allow
   to be created) without our prior written consent any other security interest
   in the property in question or part with possession of it. We may, at our
   sole discretion, require from time to time additional valuations (at your
   expense) by such valuer as we may approve, of any or all of the assets held
   by us as security.

 .  Environment. You represent and warrant (both now and in the future) that you
   have and will comply in all material respects with any applicable
   environmental law, regulation or code of practice ("environmental law") and
   with the terms and conditions of any applicable environmental licences or
   other consents or approvals required by environmental law ("environmental
   licences").

 .  Information. You must provide us with any information which we may at any
   time reasonably require, and must inform us of any material change of facts
   or circumstances. You authorise us to disclose to your auditors any such
   information concerning your accounts with us as they may from time to time
   require.

 .  Currency Accounts. If in our opinion deposits in a currency are unavailable
   to us at any time to fund a currency drawing then we will not make a drawing
   available in that currency. All payments (including interest) required to be
   made by you under a facility in a currency other than sterling must be made
   in the currency of the drawing (The "Agreed Currency") and by credit to our
   account with such banking office as we may require.

   Any amount payable by you which is received by us in a currency other than
   the Agreed Currency, will be calculated by converting (at the prevailing spot
   rate of exchange on such date and in such market as we shall determine as
   being most appropriate) the Currency so received into the Agreed Currency. If
   the amount received is less than the relevant amount of the Agreed Currency
   then you will indemnify us for the deficiency and for any losses we may
   sustain as a result. You will in addition pay the costs of such conversion.
   All payments shall be deemed to have been made on such date as we shall
   determine in accordance with our normal practice from time to time.

 .  Currency Equivalents. The Sterling/Currency Equivalent of any amount
   denominated in another currency shall be calculated by reference to the
   Bank's then current spot rate of exchange for the purchase of the relevant
   currency with the currency in which the facility is denominated. We may
   calculate the aggregate Sterling/Currency Equivalents of all drawings
   outstanding/proposed at any time to determine compliance or otherwise with
   the relevant facility limit.

 .  Contingent Liabilities. You will, on demand, pay to us an amount equal to the
   full face value of any contingent or future liabilities incurred by us at
   your request (such as letters of credit, bonds or guarantees). We may hold
   any such payment in our own name and may use it to meet such liabilities. You
   must in any event indemnify us against such liabilities and we will require
   you to execute a formal counter-indemnity in our standard form.

 .  Negotiations. You agree that all foreign cheques submitted to us for
   negotiation and/or collection will be dealt with on the basis that you have
   good title to all cheques and that you agree to indemnify us against all
   liabilities claims losses costs and expenses including exchange fluctuations
   and agents' charges which may be imposed upon, asserted against or incurred
   by us in any way relating to or arising out of the negotiation and/or
   collection of cheques on your behalf. If the cheque is subsequently returned
   unpaid you authorise us to debit your account with the amount credited to
   your account plus any losses, costs, expenses or charges which we may have
   incurred.

 .  Forward Exchange. Where we make a forward exchange facility available to you,
   you confirm and understand that no forward purchase or sale of foreign
   currency shall be made for investment purposes (see paragraph 8 of Schedule 1
   of the Financial Services Act 1986) without our prior written consent.

 .  General.
   a)  Whenever facilities are subject to Part V of the Consumer Credit Act 1974
       additional documents and procedures may be necessary before facilities
       can be drawn.

   b)  If we consider that any proposed payment or use of a facility might be
       made for an unlawful purpose, then we may refuse to make such a payment
       or allow such use.

   c)  We may give written notice or make demand by post or by hand or by
       facsimile machine or by other form of electronic communication. A notice
       or demand may be addressed to you at your Registered Office or address or
       the place of business last known to us and shall be deemed to have been
       received when transmitted or (if posted) on the business day after
       posting. We may use the facsimile number or electronic address last known
       to us.

   d)  The relationship between us, these General Terms and the AOBT are
       governed by English law and the English courts shall have jurisdiction in
       respect thereof. However when we consider it appropriate we may take
       proceedings against you in any other court of competent jurisdiction
       (whether concurrently or not with any other proceedings). These terms are
       in addition to the usual terms which apply to the relationship between a
       bank and its customer and to the operation of bank accounts (whether in
       credit or debit) and to the terms of your mandate with us and to all
       other consistent terms which may be implied by law.

   e)  You must maintain a current account with us throughout the life of any
       facilities and we may charge to your current account all amounts,
       including interest, due in respect of any facility.

 

                                       9

<PAGE>
 
                                                                   Exhibit 11(a)

                            Blue Wave Systems Inc.
 
                    Computation of Per Share Income (Loss)
                   (in thousands, except per share amounts)
<TABLE> 
<CAPTION>
                                                                                        Three Months Ended    
                                                                                            December 31,      
                                                                                         1998          1997   
                                                                                      ----------    ---------- 
<S>                                                                                   <C>           <C>       
Basic Income (Loss) Per Share:                                                    
  Net income (loss) applicable to common stock                                        $       36    $   (1,166)
                                                                                      ==========    ==========
                                                                                  
  Weighted average shares outstanding                                                     13,028        10,592
                                                                                                    
Basic income (loss) per share                                                         $     0.00    $    (0.11)
                                                                                      ==========    ==========
                                                                                                    
                                                                                                    
Diluted Income (Loss) Per Share:                                                                    
  Weighted average shares outstanding                                                     13,028        10,592
                                                                                                    
  Effect of common stock equivalents:                                                               
     Options granted                                                                         968           N/A
     Weighted average exercised options outstanding for portion of period,                          
        net of equivalent shares purchased at average fair market value                        8           N/A
     Effect of using option proceeds to repurchase common stock at                                  
        average fair market value                                                           (335)          N/A
                                                                                      ----------    ---------- 
             Total common stock equivalents                                                  641             -
                                                                                      ----------    ---------- 
                                                                                          13,669        10,592
                                                                                      ----------    ---------- 
                                                                                                    
Diluted income (loss) per share                                                       $     0.00    $    (0.11)
                                                                                      ==========    ==========
</TABLE>

<PAGE>
 
                                                                   Exhibit 11(b)

                            Blue Wave Systems Inc.
 
                    Computation of Per Share Income (Loss)
                   (in thousands, except per share amounts)
 
<TABLE>
<CAPTION>
                                                                                          Six Months Ended 
                                                                                             December 31,   
                                                                                         1998          1997
                                                                                      ----------    ----------
<S>                                                                                   <C>           <C>       
Basic Income (Loss) Per Share:
  Net income (loss) applicable to common stock                                        $     (741)   $     (724)
                                                                                      ==========    ==========
                                                                                         
  Weighted average shares outstanding                                                     13,021        10,479
                                                                                                       
Basic income (loss) per share                                                         $    (0.06)   $    (0.07)
                                                                                      ==========    ==========
                                                                                                       
                                                                                                       
Diluted Income (Loss) Per Share:                                                                       
  Weighted average shares outstanding                                                     13,021        10,479
                                                                                                       
  Effect of common stock equivalents:                                                                  
     Options granted                                                                         N/A           N/A
     Weighted average exercised options outstanding for portion of period,                             
        net of equivalent shares purchased at average fair market value                      N/A           N/A
     Effect of using option proceeds to repurchase common stock at                                     
        average fair market value                                                            N/A           N/A
                                                                                      ----------    ----------
             Total common stock equivalents                                                    -             -
                                                                                      ----------    ----------
                                                                                          13,021        10,479
                                                                                      ----------    ----------
                                                                                                       
Diluted income (loss) per share                                                       $    (0.06)   $    (0.07)
                                                                                      ==========    ==========
</TABLE>
                                        

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF BLUE WAVE SYSTEMS INC. AS OF DECEMBER 31, 1998 AND FOR
THE SIX MONTHS THEN ENDED, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1999
<PERIOD-START>                             JUL-01-1998
<PERIOD-END>                               DEC-31-1998
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