DSC COMMUNICATIONS CORP
424B3, 1997-11-20
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>   1
                                                Filed Pursuant to Rule 424(b)(3)
                                                Registration No. 333-39591

 
                                 [CELCORE LOGO]
 
                                 CELCORE, INC.
                         3800 FOREST HILL -- IRENE ROAD
                            MEMPHIS, TENNESSEE 38125
 
                               November 14, 1997
 
To the Stockholders of CELCORE, INC.:
 
     Enclosed are a Notice of Special Meeting of Stockholders, a
Prospectus/Proxy Statement and a Proxy for a Special Meeting of Stockholders
(the "Special Meeting") of CELCORE, INC. ("CELCORE") to be held on December 15,
1997 at 10:00 a.m., central time, at 3800 Forest Hill -- Irene Road, Memphis,
Tennessee 38125. At the Special Meeting you will be asked to consider and vote
on a proposal to approve and adopt (i) an Agreement and Plan of Merger (the
"Merger Agreement") pursuant to which a wholly-owned subsidiary of DSC
Communications Corporation ("DSC") will be merged with and into CELCORE (the
"Merger"), as a result of which CELCORE will become a wholly-owned subsidiary of
DSC and (ii) the payments under the Employment Agreements between DSC and each
of Thomas R. Berger, James M. Foley and Joseph J. Gonzalez, which are being
entered into in connection with the Merger. The approval of the payments under
the Employment Agreements is not a condition to the consummation of the Merger.
Additionally, the holders of CELCORE's Series A Convertible Preferred Stock, par
value $.10 per share ("Series A Preferred Stock"), Series B Convertible
Preferred Stock, par value $.10 per share ("Series B Preferred Stock"), Series C
Convertible Preferred Stock, par value $.10 per share ("Series C Preferred
Stock"), and Series D Convertible Preferred Stock, par value $.10 per share
("Series D Preferred Stock," together with the Series A Preferred Stock, Series
B Preferred Stock and Series C Preferred Stock, the "CELCORE Preferred Stock"),
will be requested to waive their right to receive cash or other property upon a
liquidation of CELCORE as provided in CELCORE's Certificate of Incorporation and
in CELCORE's Certificate of Designation for Series C Convertible Preferred Stock
and Certificate of Designation for Series D Convertible Preferred Stock (the
"Liquidation Rights").
 
     The terms of the Merger Agreement provide that each share of CELCORE's
common stock, par value $.10 per share ("CELCORE Common Stock"), and CELCORE
Preferred Stock outstanding immediately prior to the effective time of the
Merger (the "Effective Time") other than Dissenting Shares (as defined below)
will be converted into the right to receive a number of shares of DSC's common
stock, $.01 par value per share (the "DSC Common Stock"), based on the Exchange
Ratio (herein so called). The Exchange Ratio will depend on the Average Trading
Price (as defined below) of DSC Common Stock and will be equal to eight divided
by the average last sale price of DSC Common Stock on the ten consecutive
trading days immediately preceding the second trading day before the Special
Meeting (the "Average Trading Price"); provided that in the event the Average
Trading Price is $25.00 or less, then the Exchange Ratio will be .32. In
addition, each option to acquire CELCORE Common Stock, except for certain
options held by Messrs. Berger, Foley and Gonzalez, will be assumed by DSC and
will be converted into an option to acquire DSC Common Stock, based on the
Exchange Ratio. CELCORE stockholders will also receive the preferred stock
purchase rights (if any) attaching to such stock pursuant to that certain Rights
Agreement dated April 25, 1996 by and between DSC and Harris Trust and Savings
Bank, formerly KeyCorp Shareholder Services, Inc. Any resulting fractional share
interest will be paid in cash. Pursuant to the terms of the Merger Agreement, an
aggregate amount equal to 5.333% of the shares of DSC Common Stock otherwise
issuable to holders of CELCORE Common Stock and CELCORE Preferred Stock by
virtue of the Merger will be placed in two escrow funds ("Escrow Funds") with
the initial 5% held as security for losses incurred by DSC in the event CELCORE
breaches certain covenants, representations and warranties contained in the
Merger Agreement and the remaining .333% held as security for the costs and
expenses incurred by Robert P. Goodman, as the representative of CELCORE's
stockholders, in performing his duties and obligations under the escrow
provisions of the Merger Agreement.
<PAGE>   2
 
     The closing price of the DSC Common Stock on November 13, 1997 was
$21 15/16. If the Merger had been consummated as of that date, each share of
CELCORE Common Stock and CELCORE Preferred Stock would have been converted into
approximately 5,803,047 shares of DSC Common Stock and the aggregate dollar
value of all shares of DSC Common Stock to be issued in the Merger would have
been approximately $127.3 million. The exact amount of DSC Common Stock that you
will be entitled to receive for your CELCORE shares and options -- and the
dollar value of the DSC Common Stock -- will depend on a number of factors,
including (i) the actual market value of DSC Common Stock and (ii) the amount of
claims (if any) against the Escrow Funds. The Merger will become effective as
soon as practicable after all necessary regulatory and stockholder approvals are
obtained and certain other conditions are satisfied by the filing of a
Certificate of Merger with the Secretary of State of the State of Delaware.
 
     Details of the matters to be considered at the Special Meeting are set
forth in the accompanying Prospectus/Proxy Statement which you should read
carefully. A complete list of stockholders entitled to vote at the Special
Meeting will be available for examination by any of CELCORE's stockholders at
CELCORE's office, for purposes pertaining to the Special Meeting, during normal
business hours for a period of ten days prior to the Special Meeting.
 
     After careful consideration, the Board of Directors of CELCORE has
unanimously approved the Merger Agreement and the transactions contemplated
thereby and recommends that all stockholders vote for its approval. The Board of
Directors of CELCORE has received a written opinion from Donaldson, Lufkin &
Jenrette Securities Corporation, its financial advisor, dated as of October 29,
1997, that the consideration to be received by CELCORE's stockholders pursuant
to the Merger Agreement is fair to CELCORE's stockholders from a financial point
of view as of that date.
 
     All stockholders are invited to attend the Special Meeting in person. The
affirmative vote of the holders of (i) a majority of all outstanding shares of
CELCORE Common Stock and Series A Convertible Preferred Stock, voting together
as a single class, and (ii) 60% of all outstanding shares of each of CELCORE's
Series B Convertible Preferred Stock, Series C Convertible Preferred Stock and
Series D Convertible Preferred Stock, each voting separately as a single class,
represented and entitled to vote at the Special Meeting or any adjournment
thereof will be necessary for approval and adoption of the Merger Agreement. The
payments under the Employment Agreements with Messrs. Berger, Foley and Gonzalez
are contingent upon the consummation of the Merger and the approval by the
affirmative vote of the holders of more than 75% of the outstanding shares of
CELCORE Common Stock and CELCORE Preferred Stock (excluding shares held by
Messrs. Berger, Foley and Gonzalez and certain of their related parties), voting
together as a single class, represented and entitled to vote at the Special
Meeting or any adjournment thereof. The approval of the payments under the
Employment Agreements is not a condition to the consummation of the Merger. In
addition, the approval of the waiver of the Liquidation Rights by the holders of
CELCORE Preferred Stock will require the affirmative vote of the holders of 80%
of the outstanding shares of CELCORE Preferred Stock, voting together as a
single class, represented and entitled to vote at the Special Meeting or any
adjournment thereof.
 
     IN ORDER THAT YOUR SHARES MAY BE REPRESENTED AT THE SPECIAL MEETING, YOU
ARE URGED TO PROMPTLY COMPLETE, SIGN, DATE AND RETURN THE ACCOMPANYING PROXY IN
THE ENCLOSED ENVELOPE, WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING. If
you attend the Special Meeting in person you may, if you wish, vote personally
on all matters brought before the Special Meeting even if you have previously
returned your Proxy.
 
                                            Sincerely,
 
                                            /s/ ROBERT P. GOODMAN
 
                                            Robert P. Goodman
                                            Chairman of the Board and
                                            Chief Executive Officer
<PAGE>   3
 
                                 [CELCORE LOGO]
 
                         3800 FOREST HILL -- IRENE ROAD
                            MEMPHIS, TENNESSEE 38125
                              TEL: (901) 624-4000
 
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON DECEMBER 15, 1997
 
     A Special Meeting of Stockholders (the "Special Meeting") of CELCORE, INC.,
a Delaware corporation ("CELCORE"), will be held on December 15, 1997 at 10:00
a.m., central time, at 3800 Forest Hill -- Irene Road, Memphis, Tennessee 38125,
for the following purposes:
 
          1. To consider and vote upon a proposal to approve and adopt an
     Agreement and Plan of Merger, dated as of October 29, 1997 (the "Merger
     Agreement") among DSC Communications Corporation, a Delaware corporation
     ("DSC"), CI Acquisition Company, a Delaware corporation and a wholly-owned
     subsidiary of DSC ("Merger Subsidiary"), and CELCORE, pursuant to which,
     among other things (a) Merger Subsidiary would be merged with and into
     CELCORE, as a result of which CELCORE would become a wholly-owned
     subsidiary of DSC, (b) each share of CELCORE's common stock, par value $.10
     per share ("CELCORE Common Stock"), Series A Convertible Preferred Stock,
     par value $.10 per share, Series B Convertible Preferred Stock, par value
     $.10 per share, Series C Convertible Preferred Stock, par value $.10 per
     share, and Series D Convertible Preferred Stock, par value $.10 per share
     (collectively, "CELCORE Preferred Stock"), outstanding immediately prior to
     the effective time of the Merger (the "Effective Time") other than
     Dissenting Shares (as defined below) will be converted into the right to
     receive a number of shares of DSC's common stock, $.01 par value per share
     (the "DSC Common Stock"), based on the Exchange Ratio (herein so called).
     The Exchange Ratio will depend on the Average Trading Price (as defined
     below) of DSC Common Stock and will be equal to eight divided by the
     average last sale price of DSC Common Stock on the ten consecutive trading
     days immediately preceding the second trading day before the Special
     Meeting (the "Average Trading Price") as described in the accompanying
     Prospectus/Proxy Statement; provided, however, if the Average Trading Price
     is $25.00 or less then the Exchange Ratio will be .32, and (c) each option
     to acquire CELCORE Common Stock, except for certain options held by Thomas
     R. Berger, James M. Foley and Joseph J. Gonzalez, will be assumed by DSC
     and will be converted into an option to acquire DSC Common Stock, based on
     the Exchange Ratio. A copy of the Merger Agreement is attached to the
     Prospectus/Proxy Statement as Appendix A.
 
          2. To consider and vote upon a proposal to approve and adopt the
     payments under the Employment Agreements between DSC and each of Messrs.
     Berger, Foley and Gonzalez. The approval of the payments under the
     Employment Agreements is not a condition to the consummation of the Merger.
 
          3. To consider and vote upon a proposal for the holders of CELCORE
     Preferred Stock to waive any rights to receive cash or other property upon
     a liquidation of CELCORE as provided in CELCORE's Certificate of
     Incorporation and CELCORE's Certificate of Designation for Series C
     Convertible Preferred Stock and Certificate of Designation for Series D
     Convertible Preferred Stock.
 
          4. To transact such other business as may properly come before the
     Special Meeting or any adjournment(s) or postponement(s) thereof.
 
     Stockholders of record of CELCORE Common Stock and CELCORE Preferred Stock
at the close of business on October 16, 1997 will be entitled to vote as set
forth in the accompanying Prospectus/Proxy Statement at the Special Meeting and
any adjournment thereof. Only holders of record of CELCORE Common Stock and
CELCORE Preferred Stock at the close of business on the record date are entitled
to notice of, and to vote at, the Special Meeting. A complete list of
stockholders entitled to vote at the Special Meeting will be available for
examination by any of CELCORE's stockholders at CELCORE's office, for
<PAGE>   4
 
purposes pertaining to the Special Meeting, during normal business hours for a
period of ten days prior to the Special Meeting.
 
     You are cordially invited and urged to attend the Special Meeting in
person. Whether or not you plan to attend, please complete, sign, date and
promptly return the enclosed Proxy in the enclosed self-addressed, stamped
envelope. A stockholder of CELCORE who has given a proxy may revoke such proxy
at any time prior to its exercise at the Special Meeting.
 
     THE BOARD OF DIRECTORS OF CELCORE HAS UNANIMOUSLY APPROVED AND ADOPTED THE
MERGER AGREEMENT AND THE PAYMENTS UNDER THE EMPLOYMENT AGREEMENTS WITH MESSRS.
BERGER, FOLEY AND GONZALEZ. THE BOARD OF DIRECTORS OF CELCORE RECOMMENDS THAT
YOU VOTE IN FAVOR OF EACH OF THE ABOVE PROPOSALS, INCLUDING THE PROPOSAL THAT
THE HOLDERS OF CELCORE PREFERRED STOCK WAIVE ANY LIQUIDATION RIGHTS PROVIDED IN
THE CERTIFICATE OF INCORPORATION AND CERTIFICATES OF DESIGNATIONS OF CELCORE. IN
ORDER TO ASSURE YOUR REPRESENTATION AT THE SPECIAL MEETING, PLEASE COMPLETE,
SIGN, DATE AND MAIL PROMPTLY THE ENCLOSED PROXY, WHICH IS BEING SOLICITED BY THE
BOARD OF DIRECTORS OF CELCORE, WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL
MEETING. YOUR COOPERATION IS APPRECIATED.
 
                                            By order of the Board of Directors,
 
                                            CELCORE, INC.
 
                                            /s/ JAY M. ROSEN
                                            Jay M. Rosen
                                            Vice President, General Counsel and
                                            Secretary
 
Memphis, Tennessee
November 14, 1997
<PAGE>   5
 
PROSPECTUS/PROXY STATEMENT
 
<TABLE>
<C>                               <C>
          [DSC LOGO]                                 [CELCORE LOGO]
DSC COMMUNICATIONS CORPORATION                        CELCORE, INC.
        866,384 SHARES                       SPECIAL MEETING OF STOCKHOLDERS
       OF COMMON STOCK,                                TO BE HELD
   PAR VALUE $.01 PER SHARE                         DECEMBER 15, 1997
</TABLE>
 
     This Prospectus/Proxy Statement (the "Prospectus/Proxy Statement") is being
furnished to the stockholders of CELCORE, INC., a Delaware corporation
("CELCORE"), in connection with the solicitation of proxies by the Board of
Directors of CELCORE for use at a special meeting of stockholders of CELCORE to
be held on December 15, 1997, and any adjournments or postponements thereof (the
"Special Meeting").
 
     At the Special Meeting, all holders of shares of CELCORE Capital Stock (as
defined below) will consider and vote upon proposals to approve and adopt (i) an
Agreement and Plan of Merger, dated as of October 29, 1997 (the "Merger
Agreement"), among DSC Communications Corporation, a Delaware corporation
("DSC"), CI Acquisition Company, a Delaware corporation and a wholly-owned
subsidiary of DSC ("Merger Subsidiary"), and CELCORE, pursuant to which Merger
Subsidiary will merge with and into CELCORE (the "Merger"), (ii) the payments
under the employment agreements (the "Employee Agreements") between DSC and each
of Thomas R. Berger, James M. Foley and Joseph J. Gonzalez, and (iii) such other
business as may come before the Special Meeting. The approval of the payments
under the Employment Agreements is not a condition to the consummation of the
Merger. Additionally, at the Special Meeting the holders of CELCORE Preferred
Stock (as defined below) will be requested to waive any rights to receive cash
or other property upon a liquidation of CELCORE (the "Liquidation Rights") as
provided in CELCORE's Certificate of Incorporation and CELCORE's Certificate of
Designation for Series C Convertible Preferred Stock and Certificate of
Designation for Series D Convertible Preferred Stock (collectively,
"Certificates of Designations"). The waiver of such Liquidation Rights by the
holders of CELCORE Preferred Stock is a condition to consummation of the Merger.
 
     As a result of the Merger, CELCORE will become a wholly-owned subsidiary of
DSC and each share of CELCORE Capital Stock outstanding immediately prior to the
effective time of the Merger (the "Effective Time") other than Dissenting Shares
(as defined below) will be converted into the right to receive a number of
shares of DSC's common stock, $.01 par value per share (the "DSC Common Stock"),
based on the Exchange Ratio (herein so called). The Exchange Ratio will depend
on the Average Trading Price (as defined below) of DSC Common Stock and will be
equal to eight divided by the average last sale price of DSC Common Stock on the
ten
 
                                                        (Continued on next page)
 
     SEE "RISK FACTORS" BEGINNING ON PAGE 20 FOR INFORMATION THAT SHOULD BE
CONSIDERED REGARDING THE SECURITIES OFFERED HEREBY.
 
      This Prospectus/Proxy Statement and the accompanying proxy are first being
mailed to CELCORE stockholders on or about November 14, 1997.
                             ---------------------
 
THE SECURITIES TO BE ISSUED IN THE MERGER HAVE NOT BEEN APPROVED OR DISAPPROVED
BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR
 HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
  PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS/PROXY STATEMENT. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                             ---------------------
 
       The date of this Prospectus/Proxy Statement is November 14, 1997.
<PAGE>   6
 
consecutive trading days immediately preceding the second trading day before the
Special Meeting (the "Average Trading Price"); provided that in the event the
Average Trading Price is $25.00 or less then the Exchange Ratio will be .32.
Each option to acquire CELCORE Common Stock (as defined below), including
options held by Messrs. Berger, Foley and Gonzalez (the "BFG Options") other
than Canceled Options (as defined below) will be assumed by DSC and will be
converted into an option to acquire DSC Common Stock, based on the Exchange
Ratio. See "The Merger -- Interests of Certain Persons; Possible Conflicts of
Interest." CELCORE stockholders will also receive the preferred stock purchase
rights ("Preferred Stock Purchase Rights") (if any) attaching to such stock
pursuant to that certain Rights Agreement dated April 25, 1996 by and between
DSC and Harris Trust and Savings Bank, formerly KeyCorp Shareholder Services,
Inc. (the "DSC Rights Agreement"). Any resulting fractional share interest will
be paid in cash. Pursuant to the terms of the Merger Agreement, an aggregate
amount equal to 5.333% of the shares of DSC Common Stock otherwise issuable to
holders of CELCORE Capital Stock by virtue of the Merger will be placed into two
escrow funds ("Escrow Funds") and with the initial 5% held as security for
losses incurred by DSC in the event CELCORE breaches certain covenants,
representations and warranties contained in the Merger Agreement and the
remaining .333% held as security for the costs and expenses incurred by Robert
P. Goodman, as representative of the CELCORE stockholders (the
"Representative"), in performing his duties and obligations under the escrow
provisions of the Merger Agreement. A copy of the Merger Agreement is attached
to this Prospectus/Proxy Statement as Appendix A and is incorporated herein by
reference. As used herein, "CELCORE Capital Stock" means all issued and
outstanding shares of Common Stock of CELCORE, par value $.10 per share
("CELCORE Common Stock"), and all issued and outstanding shares of Series A
Convertible Preferred Stock of CELCORE, par value $.10 per share ("Series A
Preferred Stock"), Series B Convertible Preferred Stock of CELCORE, par value
$.10 per share ("Series B Preferred Stock"), Series C Convertible Preferred
Stock of CELCORE, par value $.10 per share ("Series C Preferred Stock"), and
Series D Convertible Preferred Stock of CELCORE, par value $.10 per share
("Series D Preferred Stock," and together with the Series A Preferred Stock,
Series B Preferred Stock and Series C Preferred Stock, "CELCORE Preferred
Stock").
 
     The closing price of the DSC Common Stock on November 13, 1997 was
$21 15/16. If the Merger had been consummated as of that date, each share of
CELCORE Capital Stock would have been converted into approximately 5,803,047
shares of DSC Common Stock and the aggregate dollar value of all shares of DSC
Common Stock to be issued in the Merger would have been approximately $127.3
million. The exact amount of DSC Common Stock that CELCORE's stockholders will
be entitled to receive in exchange for their CELCORE shares and options -- and
the dollar value of the DSC Common Stock -- will depend on a number of factors,
including (i) the actual market value of DSC Common Stock and (ii) the amount of
claims (if any) against the Escrow Funds. The Merger will become effective as
soon as practicable after all necessary regulatory and stockholder approvals are
obtained and certain other conditions are satisfied by the filing of a
Certificate of Merger with the Secretary of State of the State of Delaware.
 
     This Prospectus/Proxy Statement also constitutes the prospectus for the
offering of shares of DSC Common Stock to be issued in the Merger to the holders
of CELCORE Capital Stock. DSC has filed a Registration Statement on Form S-4
(together with any amendments or supplements thereto, the "Registration
Statement") with the Securities and Exchange Commission (the "Commission") of
which this Prospectus/Proxy Statement is a part. All information concerning
CELCORE contained or incorporated by reference in this Prospectus/Proxy
Statement has been furnished by CELCORE, and all information concerning DSC
contained or incorporated by reference in this Prospectus/Proxy Statement has
been furnished by DSC.
<PAGE>   7
 
                             AVAILABLE INFORMATION
 
     DSC is subject to the informational requirements of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"), and in accordance therewith files
reports and other information with the Commission. Reports, proxy statements and
other information filed by DSC may be inspected and copied at the public
reference facilities maintained by the Commission at 450 Fifth Street, NW, Room
1024, Washington, D.C. 20549 and at the Commission's regional offices at 7 World
Trade Center, 13th Floor, New York, New York 10048 and Citicorp Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of such materials
may be obtained at prescribed rates upon request from the Public Reference
Section of the Commission at 450 Fifth Street, NW, Washington, D.C. 20549. In
addition, such materials filed electronically by DSC with the Commission are
available at the Commission's World Wide Web Site at http://www.sec.gov. DSC
Common Stock is listed on the NASDAQ National Market, and such reports, proxy
statements and other information can also be inspected at the offices of the
NASDAQ National Market, Inc., Reports Section, 1735 K Street, N.W., Washington,
D.C. 20006.
 
     DSC has filed with the Commission the Registration Statement under the
Securities Act of 1933, as amended (the "Securities Act"), with respect to the
shares of DSC Common Stock to be issued pursuant to the Merger. This
Prospectus/Proxy Statement does not contain all the information set forth in the
Registration Statement and the Appendices thereto, certain parts of which were
omitted as permitted by the rules and regulations of the Commission. Such
additional information may be obtained from the Commission's principal office in
Washington, D.C.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     DSC hereby incorporates in this Prospectus/Proxy Statement by reference the
following documents which have been filed with the Commission pursuant to the
Exchange Act and made a part hereof:
 
          (a) DSC's Annual Report on Form 10-K for the fiscal year ended
     December 31, 1996 ("DSC 1996 Form 10-K");
 
          (b) DSC's Quarterly Report on Form 10-Q for the quarter ended March
     31, 1997;
 
          (c) DSC's Quarterly Report on Form 10-Q for the quarter ended June 30,
     1997;
 
          (d) DSC's Quarterly Report on Form 10-Q for the quarter ended
     September 30, 1997;
 
          (e) DSC's Current Report on Form 8-K filed August 26, 1997;
 
          (f) DSC's Current Report on Form 8-K filed November 3, 1997;
 
          (g) DSC's Current Report on Form 8-K filed November 13, 1997; and
 
          (h) The description of the DSC Common Stock as contained in DSC's
     Registration Statement on Form 8-A dated October 27, 1981, including all
     amendments and reports filed for the purpose of updating such descriptions;
     and the description of DSC's Preferred Stock Purchase Rights as contained
     in DSC's Registration Statement on Form 8-A dated May 13, 1996, including
     all amendments and reports filed for the purpose of updating such
     descriptions.
 
     All documents filed by DSC pursuant to Section 13(a), 13(c), 14 or 15(d) of
the Exchange Act subsequent to the date of this Prospectus/Proxy Statement and
prior to the date of the Special Meeting shall be deemed to be incorporated by
reference herein from the date of filing such documents. Any statement contained
herein or in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this
Prospectus/Proxy Statement to the extent that a statement contained herein (or
in any subsequently filed document which also is or is deemed to be incorporated
by reference herein) modifies or supersedes such statement. Any such statement
so modified or superseded shall not be deemed, except as so modified or
superseded, to constitute a part of this Prospectus/Proxy Statement.
 
                                        1
<PAGE>   8
 
     THIS PROSPECTUS/PROXY STATEMENT INCORPORATES DOCUMENTS BY REFERENCE WHICH
ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. THESE DOCUMENTS (OTHER THAN
APPENDICES TO SUCH DOCUMENTS THAT ARE NOT SPECIFICALLY INCORPORATED BY REFERENCE
HEREIN) ARE AVAILABLE WITHOUT CHARGE UPON REQUEST FROM, IN THE CASE OF DOCUMENTS
RELATING TO DSC, ATTN.: GENERAL COUNSEL, AT 1000 COIT ROAD, PLANO, TEXAS 75075,
(972) 519-3000. IN ORDER TO ENSURE TIMELY DELIVERY OF THE DOCUMENTS, ANY REQUEST
SHOULD BE MADE BY DECEMBER 9, 1997.
 
     No person is authorized to give any information or to make any
representation not contained in this Prospectus/Proxy Statement or in the
documents incorporated herein by reference in connection with the solicitation
and the offering made hereby and, if given or made, such information or
representation should not be relied upon as having been authorized by DSC or
CELCORE. This Prospectus/Proxy Statement does not constitute an offer to sell,
or a solicitation of an offer to purchase, the securities offered by this
Prospectus/Proxy Statement, or the solicitation of a proxy from any person, in
any jurisdiction in which it is unlawful to make such offer, solicitation of an
offer or proxy solicitation. Neither the delivery of this Prospectus/Proxy
Statement nor any distribution of the securities made under this
Prospectus/Proxy Statement shall, under any circumstances, create an implication
that there has not been any change in the affairs of DSC or CELCORE since the
date of this Prospectus/Proxy Statement other than as set forth in the documents
incorporated herein by reference.
 
                                   TRADEMARKS
 
     DSC is a registered trademark of DSC. Celcore, GlobalSwitch, GlobalCell and
GlobalHub are trademarks of CELCORE. This Prospectus/Proxy Statement may contain
certain other trademarks.
 
                           FORWARD-LOOKING STATEMENTS
 
     This Prospectus/Proxy Statement contains statements relating to future
results of DSC and CELCORE (including certain projections and business trends)
that are "forward-looking statements." Actual results may differ materially from
the results discussed in or implied by the forward-looking statements within the
meaning of Section 27A of the Securities Act and Section 21E of the Exchange
Act, which involves risks and uncertainties. Factors that might cause such a
difference include, but are not limited to, those set forth under "Risk Factors"
and detailed from time to time in the filings of DSC with the Commission.
 
                                        2
<PAGE>   9
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
AVAILABLE INFORMATION.......................................    1
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.............    1
TRADEMARKS..................................................    2
FORWARD-LOOKING STATEMENTS..................................    2
SUMMARY.....................................................    6
  Risk Factors..............................................    6
  The Companies.............................................    6
  The Special Meeting.......................................    7
  The Merger and Certain Provisions of the Merger
     Agreement..............................................    9
  Voting Agreements.........................................   13
  Description of Capital Stock and Comparison of
     Stockholders' Rights...................................   14
  Market Price Information..................................   14
  SELECTED HISTORICAL AND UNAUDITED COMBINED CONDENSED PRO
     FORMA FINANCIAL DATA...................................   16
  SELECTED UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL
     DATA...................................................   18
  COMPARATIVE HISTORICAL AND UNAUDITED PRO FORMA PER SHARE
     DATA...................................................   19
RISK FACTORS................................................   20
  Potential Effects of the Merger...........................   20
  Customer Concentration....................................   20
  Product Obsolescence and Importance of New Products.......   20
  Timely and Adequate Supply of Materials...................   21
  Competition...............................................   21
  Quarterly Earnings Fluctuations and Liquidity.............   21
  International Growth and Foreign Exchange.................   21
  Key Personnel.............................................   22
  Intellectual Property and Licensing.......................   22
  Volatility of DSC Stock Price.............................   22
  Stock Escrow..............................................   23
  Impact of Regulation......................................   23
  Multi-Year Agreements.....................................   23
  Certain Anti-Takeover Effects.............................   23
  Interests of Certain Persons; Possible Conflicts of
     Interests of Certain Persons in the Merger.............   23
THE SPECIAL MEETING.........................................   24
  General...................................................   24
  Purpose of the Special Meeting............................   24
  Vote Required.............................................   24
  Voting of Proxies.........................................   25
  Revocability of Proxies...................................   25
  Solicitation of Proxies...................................   25
  Record Date; Shares Entitled to Vote......................   25
  Quorum....................................................   26
THE MERGER..................................................   27
  General...................................................   27
  Background of the Merger..................................   27
</TABLE>
 
                                        3
<PAGE>   10
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
  CELCORE's Reasons for the Merger; Recommendation of
     CELCORE's Board of Directors...........................   27
  Opinion of Financial Advisor to CELCORE...................   29
  DSC's Reasons for the Merger..............................   30
  Effective Time............................................   31
  Terms of the Merger.......................................   31
  Certain United States Federal Income Tax Consequences.....   31
  Regulatory Approvals......................................   34
  Accounting Treatment......................................   34
  NASDAQ National Market Listing............................   34
  Interests of Certain Persons; Possible Conflicts of
     Interest...............................................   34
  Restrictions on Resales by Affiliates.....................   37
  Management................................................   38
  Loan by DSC to CELCORE....................................   38
CERTAIN PROVISIONS OF THE MERGER AGREEMENT..................   38
  Conversion of Securities..................................   38
  Exchange Procedures.......................................   39
  Escrow and Indemnification................................   40
  Certain Representations and Warranties....................   43
  Conduct of Business Pending the Merger....................   44
  No Solicitation of Transactions...........................   44
  Conditions to the Consummation of the Merger..............   45
  Termination...............................................   46
  Transaction Fee; Expenses; Damages........................   47
  Amendment and Waiver......................................   47
  Effect of the Merger on CELCORE Options...................   47
VOTING AGREEMENTS...........................................   49
  Voting and Proxy..........................................   49
  Waiver of Appraisal Rights and Preferred Stock Liquidation
     Rights.................................................   49
  No Voting Trusts and Agreements...........................   49
  Covenants and Representations.............................   49
  Registration of Merger Shares.............................   50
  No Solicitation...........................................   50
  Covenant Not-to-Compete...................................   50
INFORMATION CONCERNING DSC AND MERGER SUBSIDIARY............   51
  DSC Communications Corporation............................   51
  Merger Subsidiary.........................................   51
INFORMATION CONCERNING CELCORE..............................   52
  Products..................................................   52
  Customers.................................................   53
  Sales and Marketing.......................................   54
  Service and Support.......................................   54
  Research and Development..................................   54
  Competition...............................................   54
  Patents and Proprietary Rights............................   55
  Manufacturing.............................................   55
  Employees.................................................   56
  Legal Proceedings.........................................   56
</TABLE>
 
                                        4
<PAGE>   11
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
  AND RESULTS OF OPERATIONS.................................   56
  Overview..................................................   56
  Results of Operations.....................................   57
  Liquidity and Capital Resources...........................   58
  Recent Accounting Pronouncements..........................   59
MANAGEMENT..................................................   60
COMPENSATION OF CELCORE'S EXECUTIVE OFFICERS................   62
  Stock Options.............................................   63
PRINCIPAL STOCKHOLDERS OF CELCORE...........................   64
UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS...........   67
NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL
  STATEMENTS................................................   71
DESCRIPTION OF CAPITAL STOCK AND COMPARISON OF STOCKHOLDERS'
  RIGHTS....................................................   73
  Capital Stock.............................................   73
  CELCORE Preferred Stock...................................   73
  Special Meetings of Stockholders..........................   74
  Number of Directors.......................................   75
  Classification of Board...................................   75
  Removal of Directors......................................   75
  Anti-Takeover Provisions; Restrictions on Certain Business
     Combinations...........................................   75
  Indemnification...........................................   76
  Limitation of Monetary Liabilities........................   77
  Preemptive Rights.........................................   77
  Payment of Dividends......................................   77
  Advance Notice Requirements for Stockholder Proposals and
     Nominations............................................   78
  Rights of Dissenting Stockholders.........................   78
  Stockholders' Lists and Inspection of Books and Records...   79
PROPOSAL TO APPROVE THE PAYMENTS UNDER THE EMPLOYMENT
  AGREEMENTS................................................   80
  Vote Required for Approval................................   81
PROPOSAL TO APPROVE THE WAIVER OF LIQUIDATION RIGHTS BY
  HOLDERS OF CELCORE PREFERRED STOCK........................   82
  Vote Required for Approval................................   82
LEGAL MATTERS...............................................   83
EXPERTS.....................................................   83
GLOSSARY OF TERMS...........................................   84
INDEX TO HISTORICAL FINANCIAL STATEMENTS....................  F-1
APPENDICES
  Merger Agreement..........................................  A-1
  Fairness Opinion..........................................  B-1
  Section 262 of the Delaware General Corporation Law.......  C-1
</TABLE>
 
                                        5
<PAGE>   12
 
                                    SUMMARY
 
     The following is a summary of certain information contained elsewhere or
incorporated by reference in this Prospectus/Proxy Statement. It does not
purport to be complete and is qualified in its entirety by the full text,
including the Appendices attached hereto. Certain capitalized terms used in this
Summary are defined elsewhere in this Prospectus/Proxy Statement or in the
Glossary. The information contained in this Prospectus/Proxy Statement with
respect to DSC and its affiliates has been provided by DSC, and the information
with respect to CELCORE and its affiliates has been provided by CELCORE.
 
RISK FACTORS
 
     STOCKHOLDERS OF CELCORE SHOULD CAREFULLY EVALUATE CERTAIN RISK FACTORS
RELATING TO THE COMBINED COMPANY AFTER THE MERGER. SEE "RISK FACTORS."
 
THE COMPANIES
 
     DSC. DSC designs, develops, manufactures and markets digital switching,
access, transport and network management system products for the worldwide
telecommunications marketplace. These products allow telecommunications service
providers to build and upgrade their networks to support a wide range of voice,
data and video services. DSC offers a comprehensive product line including
digital switching systems, intelligent network products, cellular switching
systems, digital loop carrier products, digital cross-connect products and
optical transmission systems and related advanced network management systems.
DSC develops such systems to meet U.S. and international telecommunications
standards and the specific requirements of the operating companies of the
Regional Holding Companies ("RHCs"), independent telephone companies,
long-distance carriers, private networks and companies operating public and
private communications networks in other countries.
 
     DSC supplies products to a domestic and international customer base,
including local exchange telephone companies, long-distance carriers, cellular
telephone companies, international telephone companies, various Fortune 1000
companies and utility companies. Its domestic customers include the RHCs and
most major domestic independent telephone and long- distance companies,
including MCI Communications Corporation, U.S. Sprint Communications Company
L.P., GTE Communications Systems Corporation and WorldCom, Inc. DSC is also a
major manufacturer of high-capacity cellular switches for Motorola, Inc., a
leading supplier of wireless communication systems throughout the world.
International customers include DDI Corporation of Japan, Tele Danmark, Deutsche
Telekom in Germany, Cable & Wireless PLC and Mercury Communications, Ltd. in the
United Kingdom, British Telecommunications PLC, Telefonos de Mexico, S.A. de
C.V. and AAP Communications, Pty. Ltd. of Australia.
 
     DSC was incorporated under the laws of the State of Delaware in 1976. DSC's
executive offices are located at 1000 Coit Road, Plano, Texas 75075. Its
telephone number is (972) 519-3000.
 
     CELCORE. CELCORE designs, develops, assembles and installs wireless
telecommunication systems for cellular, PCS and wireless local loop applications
in low teledensity markets. CELCORE's "Target Markets" are rural locations and
areas in developing countries and emerging markets with low teledensities and
where wireline or traditional wireless infrastructure is not readily available
or economically feasible. CELCORE's systems utilize proprietary switching
software, distributed processing and open architectures in combination with
commercially available hardware to create scaleable and modular systems which
are designed to be easily adapted to any of the existing air protocol standards.
CELCORE's systems currently support the two most widely deployed air protocol
standards: AMPS, an analog air protocol standard, and GSM, a digital air
protocol standard. Through the use of object oriented technology and modular
hardware, CELCORE plans to support the other air protocol standards in the
future. CELCORE's focus is to provide telecommunications solutions to operators
in its Target Markets by emphasizing low lifetime cost of ownership comprised of
capital investment in telecommunications infrastructure and ongoing operational
costs.
                                        6
<PAGE>   13
 
     As a result of the worldwide acceptance of the GSM air protocol standard,
CELCORE's business strategy is to concentrate its business activities on
products utilizing the GSM protocol standards. Beginning in 1995, CELCORE has
concentrated its development efforts on the GSM system which it believes is the
most cost-effective and scaleable GSM system available. Currently, CELCORE has
shipped two GSM systems which are being field tested by its customers.
 
     CELCORE currently markets its systems and products worldwide through its
direct sales force, sales agents, joint ventures and strategic relationships.
CELCORE has sought joint ventures and strategic relationships in order to
achieve quick and effective penetration of international markets, and compete
effectively against larger and more established competitors. Examples include
CELCORE's strategic relationships with United International Communications
Company Limited ("United International") and Cellarer Telecommunications
Consulting ("Cellarer"), a subsidiary of Millicom International Cellular S.A.
("Millicom"), and its joint venture agreement with India Telecom Industries
Limited ("ITI") to cooperatively market, install and provide after sale support
of its wireless systems in Southeast Asia, Russia, and India and its surrounding
countries. CELCORE's customers include operators such as AT&T Wireless (U.S. and
Latin America), Celumovil (Colombia), Millicom (Russia and Bolivia),
Southwestern Bell Mobile Systems (U.S.), Telecel International (Africa) and
Yorkville Telephone Cooperative (U.S.).
 
     CELCORE was incorporated in Delaware in September 1992, and acted as the
general partner of Celcore L.P. until November 1994, when it succeeded to the
business of Celcore L.P. as a result of a reorganization. CELCORE's executive
offices are located at 3800 Forest Hill-Irene Road, Memphis, Tennessee 38125,
and its telephone number is (901) 624- 4000.
 
     Merger Subsidiary. Merger Subsidiary was formed on October 6, 1997 by DSC
solely for the purpose of effecting the Merger. It has no material assets and
has not engaged in any activities except in connection with the Merger. Its
principal executive office is located at 1000 Coit Road, Plano, Texas 75075, and
its telephone number is (972) 519-3000.
 
THE SPECIAL MEETING
 
     Time, Date and Place. The Special Meeting will be held on December 15, 1997
at 10:00 a.m., central time, at 3800 Forest Hill-Irene Road, Memphis, Tennessee
38125.
 
     Purpose of the Special Meeting. The purpose of the Special Meeting is to
consider and vote upon (i) a proposal to approve and adopt the Merger Agreement,
(ii) a proposal to approve the payments under the Employment Agreements, (iii) a
proposal for the holders of CELCORE Preferred Stock to waive any Liquidation
Rights as provided in CELCORE's Certificate of Incorporation and Certificates of
Designations and transact such other business as may properly be brought before
the Special Meeting or any adjournments or postponements thereof. See "The
Special Meeting -- Purpose of the Special Meeting."
 
     Vote Required. The affirmative vote of the holders of (i) a majority of all
outstanding shares of CELCORE Common Stock and Series A Preferred Stock, voting
together as a single class, and (ii) 60% of all outstanding shares of each of
CELCORE's Series B Preferred Stock, Series C Preferred Stock and Series D
Preferred Stock, each voting separately as a single class, represented and
entitled to vote at the Special Meeting or any adjournment thereof will be
necessary for approval and adoption of the Merger Agreement. The payments under
the Employment Agreements with Messrs. Berger, Foley and Gonzalez are contingent
upon the consummation of the Merger and the approval by the affirmative vote of
the holders of more than 75% of the outstanding shares of CELCORE Capital Stock
(excluding shares held by Messrs. Berger, Foley and Gonzalez and certain of
their related parties), voting together as a single class, represented and
entitled to vote at the Special Meeting or any adjournment thereof. The approval
of the payments under the Employment Agreements is not a condition to the
consummation of the Merger. In addition, the approval of the waiver of the
Liquidation Rights by the holders of CELCORE Preferred Stock will require the
affirmative vote of the holders of 80% of the outstanding shares of CELCORE
Preferred Stock, voting together as a single class, represented and entitled to
vote at the Special Meeting or any adjournment thereof. The Principal
Stockholders (as defined below) have entered into agreements with DSC whereby
they have agreed to vote the Principal Stockholder Shares (as defined below) and
to execute written consents with respect to such
                                        7
<PAGE>   14
 
shares in favor of approval of the Merger Agreement, the Merger, the payments
under the Employment Agreements and any other matter which could reasonably be
expected to facilitate the Merger. Furthermore, each Principal Stockholder who
is a holder of CELCORE Preferred Stock has also waived, and agreed to vote such
shares and to execute written consents with respect to such shares in favor of
the approval of the waiver of, any Liquidation Rights of such Principal
Stockholder. Each Principal Stockholder has also agreed not to take any actions
to perfect any appraisal rights it may have under Section 262 of the Delaware
General Corporation Law (the "DGCL"). In connection therewith, the Principal
Stockholders have granted irrevocable proxies to the Board of Directors of DSC
covering as of the Record Date (as defined below) approximately 5,375,171 shares
of CELCORE Common Stock, or 96% of the outstanding CELCORE Common Stock,
approximately 3,079,363 shares of Series A Preferred Stock, or 68% of the
outstanding Series A Preferred Stock, approximately 2,807,485 shares of Series B
Preferred Stock, or 93.6% of the outstanding Series B Preferred Stock,
approximately 2,160,846 shares of Series C Preferred Stock, or 71.1% of the
outstanding Series C Preferred Stock, and approximately 2,004,227 shares of
Series D Preferred Stock, or 100% of the outstanding Series D Preferred Stock.
Therefore, no additional votes from the holders of CELCORE Capital Stock are
necessary to approve the Merger Agreement or the payments under the Employment
Agreements. In addition, no additional votes from the holders of CELCORE
Preferred Stock are necessary to approve the waiver of the Liquidation Rights.
See "Voting Agreements."
 
     Voting of Proxies. Shares of CELCORE Capital Stock represented by properly
executed proxies received at or prior to the Special Meeting, and which have not
thereafter been properly revoked as described below, will be voted in accordance
with the instructions indicated therein. If no instructions are indicated, such
proxies will be voted FOR approval and adoption of the Merger Agreement, FOR
approval of the payments under the Employment Agreements, FOR approval of the
waiver of the Liquidation Rights by the holders of CELCORE Preferred Stock, and
in the discretion of the proxy holder as to any other matter that may properly
come before the Special Meeting. See "The Special Meeting -- Voting of Proxies."
 
     Revocability of Proxies. A CELCORE stockholder who has given a proxy may
revoke such proxy at any time prior to its exercise at the Special Meeting by
any manner permitted by law, including (i) giving written notice of revocation
by mail or facsimile to CELCORE prior to the Special Meeting, (ii) properly
submitting to CELCORE by mail or facsimile a duly executed proxy bearing a later
date, or (iii) voting in person at the Special Meeting. Submissions to CELCORE
should be made to Celcore, Inc., Attn: Corporate Secretary, at 3800 Forest
Hill-Irene Road, Memphis, Tennessee 38125, facsimile number (901) 624-4100. See
"The Special Meeting -- Revocability of Proxies."
 
     Record Date; Shares Entitled to Vote. The close of business on October 16,
1997 has been fixed as the record date (the "Record Date") for determining
holders of shares of CELCORE Capital Stock entitled to notice of and to vote at
the Special Meeting. As of the Record Date, (i) 5,592,250 shares of CELCORE
Common Stock were outstanding and held of record by 47 holders, (ii) 4,500,000
shares of Series A Preferred Stock were outstanding and held of record by 16
holders, (iii) 3,000,000 shares of Series B Preferred Stock were outstanding and
held of record by 33 holders, (iv) 3,038,046 shares of Series C Preferred Stock
were outstanding and held of record by 45 holders and (v) 2,004,227 shares of
Series D Preferred Stock were outstanding and held of record by one holder. Each
stockholder of record of CELCORE Common Stock as of the close of business on the
Record Date is entitled at the Special Meeting to one vote for each share of
CELCORE Common Stock held. Each stockholder of record of CELCORE Preferred Stock
as of the close of business on the Record Date is entitled at the Special
Meeting to a number of votes equal to the number of whole shares of CELCORE
Common Stock into which such shares of CELCORE Preferred Stock could be
converted on the Record Date. As of the Record Date, each share of CELCORE
Preferred Stock was convertible into one share of CELCORE Common Stock. See "The
Special Meeting--Record Date; Shares Entitled to Vote."
 
     Quorum. The presence, in person or by proxy, of the holders of a majority
of the outstanding shares of CELCORE Common Stock and CELCORE Preferred Stock
(with each series computed on an as converted basis) entitled to vote as a class
at the Special Meeting is necessary to constitute a quorum for the transaction
of business at the Special Meeting. See "The Special Meeting -- Quorum" and
"Voting Agreements."
                                        8
<PAGE>   15
 
THE MERGER AND CERTAIN PROVISIONS OF THE MERGER AGREEMENT
 
     General. If all stockholder approvals described in this Prospectus/Proxy
Statement are obtained and all other conditions to the Merger are satisfied (or
waived, if permissible), then at the Effective Time, Merger Subsidiary will be
merged with and into CELCORE, with CELCORE to be the surviving corporation (the
"Surviving Corporation") with the name DSC/Celcore, Inc. In the Merger, each
share of CELCORE Capital Stock outstanding immediately prior to the Effective
Time (other than any shares held by a holder who has not voted for the Merger
and with respect to which appraisal has been properly demanded ("Dissenting
Shares") in accordance with the applicable provisions of the DGCL) will be
converted into the right to receive that number of shares of DSC Common Stock
equal to the Exchange Ratio upon the surrender of the certificate representing
such shares of CELCORE Capital Stock including, with respect to each whole share
of CELCORE Capital Stock to be received, the right to receive one Preferred
Stock Purchase Right, and in any case, subject to the escrow provisions of the
Merger Agreement. See "Certain Provisions of the Merger Agreement -- Exchange
Procedures" and "-- Escrow and Indemnification." The Exchange Ratio will be
equal to eight divided by the Average Trading Price; provided that in the event
the Average Trading Price is $25.00 or less then the Exchange Ratio will be .32.
In addition, all options to purchase shares of CELCORE Common Stock ("CELCORE
Options"), except for certain BFG Options, outstanding under the Celcore, Inc.
1995 Stock Option Plan (the "1995 Plan") and the Celcore, Inc. 1996 Stock
Incentive Plan (the "1996 Plan"), each as amended, will be assumed by DSC and
will be converted into an option to acquire DSC Common Stock, based on the
Exchange Ratio. Any resulting fractional share interest will be paid in cash.
See "Certain Provisions of the Merger Agreement -- Effect of the Merger on
CELCORE Options." See "The Merger -- Interests of Certain Persons; Possible
Conflicts of Interest."
 
     Escrow and Indemnification. At the Effective Time, an aggregate amount
equal to 5.333% of the shares (rounded to the nearest whole share) of DSC Common
Stock issuable to CELCORE's stockholders (other than holders of Dissenting
Shares) as a result of the Merger will be segregated and deducted therefrom and
deposited in two Escrow Funds with an institution designated by DSC and
reasonably acceptable to the Representative (the "Escrow Agent"). The first
escrow fund (the "DSC Escrow Fund") will be comprised of 5% of such shares and
will be held as collateral for the indemnification obligations of the persons
who were CELCORE stockholders (other than holders of Dissenting Shares) or
holders of CELCORE Options immediately prior to the Effective Time. The second
escrow fund (the "Representative Escrow Fund") will be comprised of .333% of
such shares and will be used to pay for certain costs and expenses
("Representative Expenses") incurred by the Representative in performing his
obligations under the escrow provisions of the Merger Agreement. Upon the
exercise of any CELCORE Option after the Effective Time but before the
Expiration Date (as defined below), 5% and .333% of the shares of DSC Common
Stock issued upon such exercise will be added to the DSC Escrow Fund and the
Representative Escrow Fund, respectively, upon such exercise. Each stockholder
of CELCORE and each individual who, prior to the Expiration Date, has exercised
CELCORE Options assumed by DSC, will have voting rights with respect to the
shares of DSC Common Stock contributed to the Escrow Funds by such party (and on
any voting securities added to the Escrow Funds in respect of such shares of DSC
Common Stock). The Escrow Funds will terminate at 5:00 p.m., Dallas, Texas time,
one year following the Closing Date (the "Expiration Date"). On the Expiration
Date, the shares comprising the Escrow Funds, less any payments pursuant to the
indemnification provisions of the Merger Agreement and Representative Expenses,
will be released from the Escrow Funds and distributed to CELCORE's stockholders
and, with respect to the DSC Escrow Fund, to those individuals who have on or
prior to the Expiration Date exercised CELCORE Options assumed by DSC. BY
APPROVING THE MERGER AGREEMENT, CELCORE'S STOCKHOLDERS (OTHER THAN THE HOLDERS
OF DISSENTING SHARES) WILL BE DEEMED TO HAVE APPROVED THE ESTABLISHMENT OF THE
ESCROW FUNDS AND CONSENTED TO THE APPOINTMENT OF ROBERT P. GOODMAN TO ACT AS
REPRESENTATIVE ON BEHALF OF CELCORE'S STOCKHOLDERS UNDER THE MERGER AGREEMENT
AND THE ESCROW AGREEMENTS WITH THE ESCROW AGENT TO DELIVER SHARES HELD IN ESCROW
TO DSC IN SATISFACTION OF CERTAIN CLAIMS BROUGHT BY DSC, AND THE REPRESENTATIVE
IN SATISFACTION OF THE REPRESENTATIVE EXPENSES, TO OBJECT TO SUCH DELIVERIES, TO
AGREE TO, TO NEGOTIATE AND TO ENTER INTO SETTLEMENTS AND COMPROMISES WITH
RESPECT TO SUCH CLAIMS, AND
                                        9
<PAGE>   16
 
TO TAKE CERTAIN OTHER ACTIONS ON BEHALF OF CELCORE'S STOCKHOLDERS, ALL AS MORE
FULLY DESCRIBED IN ARTICLE IX OF THE MERGER AGREEMENT. SEE ARTICLE IX OF THE
MERGER AGREEMENT FOR A MORE DETAILED EXPLANATION OF THE ESCROW FUNDS AND RIGHTS
WITH RESPECT THERETO AND "CERTAIN PROVISIONS OF THE MERGER AGREEMENT -- ESCROW
AND INDEMNIFICATION."
 
     Recommendation of the Board of Directors of CELCORE. CELCORE'S BOARD OF
DIRECTORS HAS UNANIMOUSLY DETERMINED THAT THE TERMS OF THE MERGER AGREEMENT AND
THE MERGER OFFER THE BEST VALUE REASONABLY AVAILABLE TO, AND ARE IN THE BEST
INTERESTS OF, CELCORE AND ITS STOCKHOLDERS. ACCORDINGLY, THE BOARD OF DIRECTORS
OF CELCORE HAS UNANIMOUSLY APPROVED THE MERGER AGREEMENT AND THE PAYMENTS UNDER
THE EMPLOYMENT AGREEMENTS AND RECOMMENDS THAT THE STOCKHOLDERS OF CELCORE VOTE
FOR APPROVAL AND ADOPTION OF THE MERGER AGREEMENT AND THE PAYMENTS UNDER THE
EMPLOYMENT AGREEMENTS. ADDITIONALLY, THE BOARD OF DIRECTORS OF CELCORE
RECOMMENDS THAT THE HOLDERS OF CELCORE PREFERRED STOCK VOTE FOR APPROVAL OF THE
WAIVER OF THE LIQUIDATION RIGHTS. The recommendation of the Board of Directors
of CELCORE is based on a number of factors described in "The
Merger -- Background of the Merger" and "-- CELCORE's Reasons for the Merger;
Recommendation of CELCORE's Board of Directors."
 
     Effective Time. The Effective Time will occur as soon as practicable after
the requisite approval of CELCORE's stockholders has been obtained and all other
conditions have been satisfied or waived, and in no event later than the first
business day after all conditions to the Merger have been satisfied or waived,
unless the parties agree otherwise, the filing of a Certificate of Merger with
the Secretary of State of the State of Delaware.
 
     Fairness Opinion. On October 29, 1997, Donaldson, Lufkin & Jenrette
Securities Corporation ("DLJ"), financial advisor to CELCORE, delivered a
written opinion to the Board of Directors of CELCORE that, as of that date, the
consideration to be provided to CELCORE stockholders pursuant to the Merger
Agreement is fair to the holders of shares of CELCORE Capital Stock from a
financial point of view. The Board of Directors of CELCORE has not requested
that DLJ update its opinion. The full text of the written opinion of DLJ, which
sets forth the procedures followed and the factors considered by DLJ, is
attached as Appendix B to this Prospectus/Proxy Statement. HOLDERS OF SHARES OF
CELCORE CAPITAL STOCK ARE URGED TO, AND SHOULD, READ SUCH OPINION IN ITS
ENTIRETY. See "The Merger -- Opinion of Financial Advisor to CELCORE."
 
     Certain United States Federal Income Tax Consequences. The Merger is
intended to qualify, for federal income tax purposes, as a "tax-free
reorganization" so that generally no gain or loss would be recognized by CELCORE
stockholders who exchange their CELCORE Capital Stock solely for shares of DSC
Common Stock. Holders of shares of CELCORE Capital Stock who receive cash in
lieu of fractional shares generally will be treated as if the fractional shares
had been issued and subsequently redeemed by DSC. Unless the redemption is found
to be essentially equivalent to a dividend, each stockholder of CELCORE will
recognize gain or loss measured by the difference between such stockholder's
basis in the fractional share and the amount of cash received. CELCORE has
received the opinion of Powell, Goldstein, Frazer & Murphy LLP, its counsel, and
DSC has received the opinion of Baker & McKenzie, its counsel (collectively, the
"Tax Opinions"), that the Merger should constitute a reorganization within the
meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended (the
"Code"), and that, generally, the CELCORE stockholders should not recognize gain
or loss on the exchange of their CELCORE Capital Stock for the stock of DSC
pursuant to the Merger. Depending upon uncertain factual developments, it is
possible that the Merger might not be treated as a reorganization within the
meaning of Section 368(a) of the Code, as a result of which each holder of
shares of CELCORE Capital Stock would recognize gain or loss in the amount of
the difference between the fair market value of the shares of DSC Common Stock
and any cash received in lieu of fractional shares, and such holder's adjusted
tax basis in CELCORE Capital Stock exchanged therefor. In particular, tax-free
"reorganization" status is dependent, in part, on stockholders of CELCORE that
receive a certain percentage of the DSC Common Stock distributed in the
reorganization not having a present plan or intention
                                       10
<PAGE>   17
 
to dispose of such stock. The conclusions in the Tax Opinions were predicated on
certain assumptions and representations regarding the plans or intentions of
certain stockholders of CELCORE, including the Principal Stockholders. See "The
Merger--Certain United States Federal Income Tax Consequences."
 
     Regulatory Approvals. DSC and CELCORE are aware of no government regulatory
approvals remaining to be obtained for consummation of the Merger, other than
compliance with notification requirements of environmental agencies, with
federal securities laws and with state securities or "Blue Sky" laws. The Merger
was subject to the premerger notification provisions of the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"). Filings were
made under the HSR Act by DSC and CELCORE with the Federal Trade Commission and
the Department of Justice Antitrust Division. DSC, CELCORE and Merger Subsidiary
have each agreed to use their best efforts to obtain any additional regulatory
approvals. See "The Merger -- Regulatory Approvals."
 
     Accounting Treatment. DSC intends to account for the Merger as a purchase
of CELCORE in accordance with generally accepted accounting principles ("GAAP").
See "The Merger -- Accounting Treatment" and "DSC and CELCORE Unaudited Pro
Forma Combined Financial Statements."
 
     NASDAQ Listing. An application has been filed to have the shares of DSC
Common Stock to be issued in connection with the Merger approved for quotation
on the NASDAQ National Market. Evidence that the shares of DSC Common Stock to
be issued in connection with the Merger have been approved for quotation on the
NASDAQ National Market immediately following the Effective Time is a condition
to consummation of the Merger. See "Certain Provisions of the Merger
Agreement -- Conditions to the Consummation of the Merger."
 
     Interests of Certain Persons in the Merger. In considering the
recommendation of the Board of Directors of CELCORE with respect to the Merger
Agreement and the transactions contemplated thereby, stockholders should be
aware that certain members of the management of CELCORE and of its Board of
Directors have certain interests in the Merger that differ from, and are in
addition to, the interests of stockholders of CELCORE. See "The
Merger -- Interests of Certain Persons; Possible Conflicts of Interest" and
"-- Management."
 
     Management. After the Merger, the officers and directors of DSC will not
change. Pursuant to the Merger Agreement, upon the consummation of the Merger,
the officers and directors of Merger Subsidiary immediately prior to the
Effective Time will be the officers and directors of the Surviving Corporation.
See "The Merger -- Management."
 
     Procedures for Exchange of Certificates. Promptly after the Effective Time,
a letter of transmittal and instructions for surrendering stock certificates
will be mailed to each holder of CELCORE Capital Stock for use in exchanging
such holder's stock certificates for certificates evidencing shares of DSC
Common Stock and cash in lieu of fractional shares and any dividends or other
distributions to which such holder is entitled as a result of the Merger. See
"Certain Provisions of the Merger Agreement -- Exchange Procedures."
 
     Representations and Warranties. The Merger Agreement contains various
representations and warranties of DSC, Merger Subsidiary and CELCORE. See
"Certain Provisions of the Merger Agreement -- Certain Representations and
Warranties."
 
     Conduct of Business Pending the Merger; No Solicitations. The Merger
Agreement restricts the ability of CELCORE and DSC to take certain actions and
enter into certain transactions pending the Merger. See "Certain Provisions of
the Merger Agreement -- Conduct of Business Pending the Merger" and "-- No
Solicitation of Transactions."
 
     Conditions to the Consummation of the Merger. The obligations of DSC,
Merger Subsidiary and CELCORE to consummate the Merger are subject to the
satisfaction of various conditions, including, among others: (i) the
effectiveness of the Registration Statement and the absence of any stop order
suspending the effectiveness thereof; (ii) approval of the Merger Agreement and
the transactions contemplated thereunder by the holders of the requisite number
of shares of CELCORE Capital Stock; (iii) the waiver of the Liquidation Rights
by the holders of CELCORE Preferred Stock; (iv) the absence of any proceeding by
any governmental authority challenging or seeking material damages in connection
with the Merger or otherwise seeking to
                                       11
<PAGE>   18
 
restrain or prohibit the consummation of the Merger; (v) the absence of any
award, decision, decree, determination, injunction, judgment, order, consent
decree, ruling, subpoena, writ or verdict entered, issued, made or rendered by
any court, administrative agency or other governmental authority or by any
arbitrator (each, an "Order") prohibiting consummation of the Merger or making
the Merger illegal; (vi) evidence from the NASDAQ National Market that the
shares of DSC Common Stock to be issued in the Merger have been approved for
quotation on the NASDAQ National Market; (vii) any applicable waiting period
under the HSR Act relating to the Merger will have expired or been terminated;
and (viii) DSC and CELCORE will have received from their respective counsel an
opinion that the Merger qualifies as a tax-free reorganization. See "Certain
Provisions of the Merger Agreement -- Conditions to the Consummation of the
Merger."
 
     Termination. The Merger Agreement may be terminated at any time prior to
the Effective Time by (i) mutual consent of the Boards of Directors of each of
DSC, Merger Subsidiary, and CELCORE, (ii) by either DSC or CELCORE if, subject
to certain limitations: (A) the Effective Time has not occurred on or before
January 31, 1998; (B) there exists any Order which is final and nonappealable
preventing the consummation of the Merger; (C) the stockholders of CELCORE fail
to approve and adopt the Merger Agreement and the transactions contemplated
thereunder or if the holders of CELCORE Preferred Stock fail to waive their
Liquidation Rights; or (D) the other party has breached any representation,
warranty, covenant or agreement in the Merger Agreement or if any representation
or warranty of such other party is not true and correct in all material
respects, such that the related closing conditions would not be satisfied
(unless the breach is curable by the breaching party through the exercise of its
best efforts and it continues to exercise its best efforts to cure the breach).
In addition, DSC may terminate the Merger Agreement if (i) the Board of
Directors of CELCORE withdraws its recommendation to the holders of CELCORE
Capital Stock to approve the Merger; or (ii) the Board of Directors of CELCORE
resolves or recommends to the holders of CELCORE Capital Stock (A) any merger,
consolidation, share exchange, business combination or other similar transaction
(other than the Merger); (B) any sale, lease, exchange, transfer or other
disposition (other than a pledge or mortgage) of 25% or more of the assets of
CELCORE; or (C) a tender offer or exchange offer of 33 1/3% or more of the
shares of CELCORE Capital Stock. CELCORE may also terminate the Merger Agreement
if the Average Trading Price is less than $25.00 per share. See "Certain
Provisions of the Merger Agreement -- Termination."
 
     Transaction Fee; Expenses; Damages. In connection with the termination of
the Merger Agreement, upon the occurrence of certain events, CELCORE would be
required to pay to DSC a fee (the "Transaction Fee") of $5 million (less
reasonable out-of-pocket expenses and fees actually incurred by DSC related to
the Merger and previously paid). CELCORE would also be required to pay to DSC
its expenses (but not the Transaction Fee) up to $1 million under certain
circumstances, and one-half of its expenses up to $500,000 under other
circumstances. Subject to certain events, DSC would be required to pay to
CELCORE its expenses up to $500,000. See "Certain Provisions of the Merger
Agreement -- Transaction Fee; Expenses; Damages."
 
     Rights of Dissenting Stockholders. Holders of CELCORE Capital Stock who
object to the Merger may, under certain circumstances and by following
procedures prescribed by Section 262 of the DGCL, exercise appraisal rights and
receive cash for their shares of CELCORE Capital Stock in an amount equal to the
fair market value of CELCORE Capital Stock as determined pursuant to such
procedures. The failure of a dissenting stockholder of CELCORE to follow the
appropriate procedures will result in the termination or waiver of such rights.
In the event that a CELCORE stockholder who attempts to exercise appraisal
rights should fail to make a proper demand for payment or otherwise relinquishes
or loses such stockholder's status as a dissenting stockholder, such CELCORE
stockholder will be entitled to receive from DSC the same number of shares of
DSC Common Stock that such CELCORE stockholder would have received in the Merger
if such CELCORE stockholder had not attempted to exercise appraisal rights. A
copy of the full text of Section 262 of the DGCL is attached to this
Prospectus/Proxy Statement as Appendix C and is incorporated herein by
reference. See "Description of Capital Stock and Comparison of Stockholders'
Rights -- Rights of Dissenting Stockholders" and Appendix C.
 
     Treatment of Stock Options. Pursuant to the Merger Agreement, all CELCORE
Options outstanding under the 1995 Plan and the 1996 Plan, except for certain
BFG Options, will be assumed by DSC and will be
                                       12
<PAGE>   19
 
converted into options to acquire DSC Common Stock, based on the Exchange Ratio.
See "The Merger -- Interests of Certain Persons; Possible Conflicts of Interest"
and "Certain Provisions of the Merger Agreement -- Effect of the Merger on
CELCORE Options."
 
     Affiliate Agreements. CELCORE has agreed to use its best efforts to cause
persons identified by CELCORE as "affiliates" (as that term is defined for
purposes of Rule 145 promulgated under the Securities Act) to enter into
agreements restricting sales, dispositions or other transactions reducing their
risk of investment in respect of the shares of CELCORE Capital Stock held by
them prior to the Merger and the shares of DSC Common Stock received by them in
the Merger, subject to a de minimis exception, so as to comply with the
requirements of applicable federal securities and tax laws. See "Certain
Provisions of the Merger Agreement -- Conditions to the Consummation of the
Merger" and "The Merger -- Restrictions on Resales by Affiliates."
 
VOTING AGREEMENTS
 
     Voting and Proxy; Waiver of Appraisal Rights and Preferred Stock
Liquidation Rights. In connection with the Merger Agreement, each of the
directors and executive officers of CELCORE, certain of their affiliates,
certain other significant stockholders of CELCORE and UCOM International Company
Limited (each, a "Principal Stockholder" and collectively, the "Principal
Stockholders") entered into a Voting Agreement (the "Voting Agreements") with
DSC. A copy of the form of the Voting Agreement is attached to this
Prospectus/Proxy Statement as Exhibit C to Appendix A. As of the Record Date,
the Principal Stockholders together held approximately 5,375,171 shares or 96.1%
of the outstanding shares of CELCORE Common Stock, approximately 3,079,363
shares or 68.4% of the outstanding Series A Preferred Stock, approximately
2,807,485 shares or 93.6% of the outstanding Series B Preferred Stock,
approximately 2,160,846 shares or 71.1% of the outstanding Series C Preferred
Stock, and approximately 2,004,227 shares or 100% of the outstanding Series D
Preferred Stock. Pursuant to the Voting Agreements, the Principal Stockholders
agreed to vote, and have granted an irrevocable proxy to allow DSC to vote, the
shares of CELCORE Capital Stock over which they have voting control (the
"Principal Stockholder Shares") in favor of the Merger, the Merger Agreement,
the payments under the Employment Agreements, and any other matter that could
reasonably be expected to facilitate the Merger. Pursuant to the Voting
Agreements, each Principal Stockholder who is a holder of CELCORE Preferred
Stock also waived, and agreed to vote such shares and to execute written
consents with respect to such shares in favor of the approval of the waiver of,
any Liquidation Rights of such Principal Stockholders. Additionally, under the
Voting Agreements, each Principal Stockholder agreed not to take any action or
actions to perfect any appraisal rights it may have as a result of the Merger
under Section 262 of the DGCL. See "Voting Agreements -- Voting and Proxy" and
"-- Waiver of Appraisal Rights and Preferred Stock Liquidation Rights."
 
     No Voting Trusts and Agreements. Pursuant to the Voting Agreements, each
Principal Stockholder agreed that it will not, and will not permit any entity
under its control to, subject any shares of CELCORE Capital Stock held by such
Principal Stockholder or such entity to a voting trust or any arrangement or
agreement with respect to the voting of such shares other than agreements
entered into with DSC or its affiliates. See "Voting Agreements -- No Voting
Trusts and Agreements."
 
     Covenants and Representations. Pursuant to the Voting Agreements, each
Principal Stockholder agreed that it has been advised that: (i) the offer, sale
and delivery of the DSC Common Stock to such Principal Stockholder pursuant to
the Merger may not be registered under the Securities Act, despite DSC's
obligations to use commercially reasonable efforts to effect such registration;
(ii) if the offer, sale and delivery of the DSC Common Stock to such Principal
Stockholder pursuant to the Merger has not been registered under the Securities
Act, then such shares may not be offered, sold, pledged, hypothecated or
otherwise transferred unless subsequently registered under the Securities Act or
an exemption from such registration is available; and (iii) even if such sale
and delivery to such Principal Stockholder of shares of DSC Common Stock is
registered under the Securities Act, to the extent such Principal Stockholder is
considered an affiliate of CELCORE at the time the Merger Agreement is submitted
for a vote of CELCORE's stockholders, any public offering or sale by such
Principal Stockholder of such person's shares of DSC Common Stock will, under
current law, require (a) the further registration under the Securities Act of
such shares, which DSC is
                                       13
<PAGE>   20
 
obligated to use commercially reasonable efforts to effect, (b) compliance with
Rule 145 under the Securities Act, or (c) the availability of another exemption
from registration under the Securities Act. See "Voting Agreements -- Covenants
and Representations."
 
     Registration of Merger Shares. Pursuant to the Voting Agreements, DSC
agreed to use all commercially reasonable efforts to effect on or before the
Effective Time the registration under the Securities Act, on an appropriate
form, of the shares of DSC Common Stock to be issued to the Principal
Stockholders pursuant to the Merger. In addition, the Voting Agreements require
DSC to use its best efforts to keep such registration statement effective for
the earlier of two years after the Effective Time or until all shares of DSC
Common Stock issued to such Principal Stockholder pursuant to the Merger have
been disposed of by such Principal Stockholder. See "Voting
Agreements -- Registration of Merger Shares."
 
     No Solicitation. Pursuant to the Voting Agreements, each Principal
Stockholder agreed it will not, and will not permit any entity under such
Principal Stockholder's control to, (i) solicit proxies or become a participant
in a solicitation with respect to any proposal made in opposition to or
competition with consummation of the Merger and the Merger Agreement, any
merger, consolidation, share exchange, sale of securities or assets,
reorganization, recapitalization or other business combination involving CELCORE
and any other party (other than DSC and it affiliates), any liquidation
(including the Liquidation Rights provided for in the Certificate of
Incorporation and Certificates of Designations of CELCORE), or winding up of
CELCORE and any other matter that would, or could reasonably be expected to,
prohibit or discourage the Merger (each, an "Opposing Proposal"), or otherwise
encourage or assist any party in taking or planning any action that would
compete with, restrain or otherwise serve to interfere with or inhibit the
timely consummation of the Merger in accordance with the terms of the Merger
Agreement, (ii) initiate a vote of the Principal Stockholders or action by
consent of the stockholders of CELCORE or (iii) become a member of a "group" (as
defined in Section 13(d) of the Exchange Act) with respect to any voting
securities of CELCORE with respect to an Opposing Proposal. See "Voting
Agreements -- No Solicitation."
 
     Covenant Not-to-Compete. Robert P. Goodman, Chairman of the Board and Chief
Executive Officer of CELCORE, executed a covenant not-to-compete as part of his
Voting Agreement. Mr. Goodman agreed that until after the fifth anniversary of
the Closing Date, he will not be involved in developing, marketing,
manufacturing or selling GSM or AMPS mobile switching centers (a "Prohibited
Business") within certain geographic areas. Mr. Goodman also agreed that until
after the first anniversary of the Closing Date, he will not make known to
persons or corporations involved in a Prohibited Business the customers of
CELCORE; contact or take away or attempt to contact or take away CELCORE
customers for persons or corporations involved in a Prohibited Business; or
recruit or hire or attempt to recruit or hire CELCORE employees, consultants or
independent contractors. Mr. Goodman agreed that a breach or violation of the
covenant not-to-compete will entitle DSC to an injunction restraining any
further or continued breach or violation of the covenant not-to-compete. None of
the other Principal Stockholder's Voting Agreements contain a covenant
not-to-compete. See "Voting Agreements -- Covenant Not-to-Compete."
 
DESCRIPTION OF CAPITAL STOCK AND COMPARISON OF STOCKHOLDERS' RIGHTS
 
     Upon consummation of the Merger, stockholders of CELCORE will become
stockholders of DSC. Various differences exist between their rights as
stockholders of CELCORE and as stockholders of DSC. See "Description of Capital
Stock and Comparison of Stockholders' Rights."
 
MARKET PRICE INFORMATION
 
     The following table sets forth, for the quarters indicated, the high and
low closing sale prices per share of DSC Common Stock. DSC Common Stock is
listed on the NASDAQ National Market under the symbol "DIGI." Neither CELCORE
Common Stock nor any CELCORE Preferred Stock is traded in an established public
market. Each of DSC's and CELCORE's fiscal year ends on December 31. On October
28, 1997, the last full trading day preceding the execution of the Merger
Agreement, the last reported sale price per share of DSC Common Stock was
$25 3/16 per share. On November 4, 1997, the most recent practicable date prior
to
                                       14
<PAGE>   21
 
the filing of the Registration Statement, the last sale price of DSC Common
Stock as reported on the NASDAQ National Market was $25 3/8 per share.
 
     Because the market price of DSC Common Stock is subject to fluctuation, the
number of the shares of DSC Common Stock that holders of CELCORE Capital Stock
will receive in the Merger (and the market value of those DSC shares) may
increase or decrease prior to the Merger.
 
     CELCORE STOCKHOLDERS ARE URGED TO OBTAIN A CURRENT MARKET QUOTATION FOR THE
DSC COMMON STOCK.
 
<TABLE>
<CAPTION>
                                                                   DSC
                                                              COMMON STOCK
                                                              -------------
                                                              HIGH      LOW
                                                              ----      ---
<S>                                                           <C>       <C>
CALENDAR YEAR 1995
  1st Quarter...............................................  $39       $315/8
  2nd Quarter...............................................   461/2     313/4
  3rd Quarter...............................................   63        455/8
  4th Quarter...............................................   583/4     31
CALENDAR YEAR 1996
  1st Quarter...............................................   371/8     227/8
  2nd Quarter...............................................   351/4     243/8
  3rd Quarter...............................................   323/4     251/8
  4th Quarter...............................................   231/8     127/8
CALENDAR YEAR 1997
  1st Quarter...............................................   241/4     18
  2nd Quarter...............................................   267/16    185/8
  3rd Quarter...............................................   321/8     2111/16
  4th Quarter (through November 13, 1997)...................   3011/16   2023/32
</TABLE>
 
                                       15
<PAGE>   22
 
              SELECTED HISTORICAL AND UNAUDITED COMBINED CONDENSED
                            PRO FORMA FINANCIAL DATA
 
     The following selected historical financial data for the periods indicated
have been derived from the consolidated financial statements of DSC. The balance
sheet data as of December 31, 1995 and 1996, and the statement of operations
data for each of the years in the three-year period ended December 31, 1996,
have been derived from DSC's audited consolidated financial statements for such
years and should be read in conjunction with such consolidated financial
statements and the notes thereto that are incorporated herein by reference. The
balance sheet data as of December 31, 1992, 1993 and 1994, and the statement of
operations data for the years ended December 31, 1992 and 1993, have been
derived from DSC's audited consolidated financial statements, which are not
included in this Prospectus/Proxy Statement. The selected historical financial
data for the nine months ended September 30, 1996 and 1997 have been derived
from unaudited condensed financial statements incorporated herein by reference
and reflect, in the opinion of management of DSC, all adjustments necessary to
present fairly DSC's financial position and results of operations. Such
adjustments are of a recurring nature unless otherwise disclosed therein.
Interim results are not necessarily indicative of results which may be expected
for any other period or the full fiscal year.
 
                         DSC COMMUNICATIONS CORPORATION
                       SELECTED HISTORICAL FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                                          NINE MONTHS ENDED
                                                           YEAR ENDED DECEMBER 31,                          SEPTEMBER 30,
                                          ----------------------------------------------------------   -----------------------
                                            1992       1993        1994         1995       1996(1)      1996(1)      1997(2)
                                          --------   --------   ----------   ----------   ----------   ----------   ----------
                                                                                                             (UNAUDITED)
<S>                                       <C>        <C>        <C>          <C>          <C>          <C>          <C>
STATEMENT OF OPERATIONS DATA:
  Revenues..............................  $536,319   $730,774   $1,003,125   $1,422,018   $1,380,891   $  990,331   $1,130,374
  Gross profit..........................   202,776    317,969      490,392      685,899      455,144      304,942      468,957
  Operating income (loss)...............    42,431    110,176      213,999      279,418      (12,043)     (42,821)     106,811
  Net income (loss).....................  $ 11,594   $ 81,660   $  162,626   $  192,680   $   (7,555)  $  (25,103)  $   86,433
                                          ========   ========   ==========   ==========   ==========   ==========   ==========
  Income (loss) per share(3)............  $   0.12   $   0.77   $     1.39   $     1.63   $    (0.06)  $    (0.22)  $     0.73
                                          ========   ========   ==========   ==========   ==========   ==========   ==========
  Average shares used in per share
    computation(3)......................    93,198    106,650      116,889      118,126      116,514      116,269      119,169
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                                                AS OF
                                                              AS OF DECEMBER 31,                            SEPTEMBER 30,
                                          ----------------------------------------------------------   -----------------------
                                            1992       1993        1994         1995         1996         1996       1997(4)
                                          --------   --------   ----------   ----------   ----------   ----------   ----------
                                                                                                             (UNAUDITED)
<S>                                       <C>        <C>        <C>          <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
  Cash and marketable securities........  $ 69,839   $313,808   $  271,322   $  569,264   $  334,039   $  420,457   $  678,109
  Working capital.......................    79,010    406,752      393,034      738,965      769,956      770,778    1,143,420
  Property and equipment, net...........   149,209    179,783      282,963      370,522      403,596      398,798      443,664
  Total assets..........................   547,669    900,417    1,268,536    1,865,275    1,925,655    1,922,619    2,406,156
  Short-term and long-term debt.........   140,409     70,412       82,369      326,977      308,580      348,419      665,448
  Shareholders' equity(5)...............   202,627    617,800      851,100    1,124,079    1,147,636    1,117,389    1,244,262
</TABLE>
 
- ---------------
 
(1) For the nine months ended September 30, 1996 and the year ended December 31,
    1996, DSC recorded non-cash special charges totaling $96.0 million ($82.5
    million reduced gross profit and $13.5 million was charged to operating
    costs and expenses) related primarily to a reduction in the carrying value
    of certain assets for several of DSC's products.
 
(2) Net income for the nine-month period ended September 30, 1997 included
    pre-tax gains of approximately $35.5 million (after-tax gain of $22.0
    million, or $0.18 per share) from sales of stock received from a 1996
    litigation settlement.
 
(3) In April 1994, the Board of Directors declared a two-for-one stock split,
    effected in the form of a 100% stock dividend, for stockholders of record on
    May 11, 1994. All per share amounts prior to 1994 have been restated to
    retroactively reflect the stock split.
 
(4) Short-term and long-term debt included $400 million of 7% convertible
    subordinated notes issued in August 1997. Net proceeds were invested in cash
    equivalents and marketable securities.
 
(5) Since inception, DSC has not declared or paid a cash dividend.
                                       16
<PAGE>   23
 
     The following historical financial data for the periods indicated have been
derived from the financial statements of CELCORE. The balance sheet data as of
December 31, 1995 and 1996, and the statement of operations data for each of the
years in the three-year period ended December 31, 1996 have been derived from
CELCORE's audited financial statements for such years and are included elsewhere
in this Prospectus/Proxy Statement. CELCORE's historical balance sheet data as
of December 31, 1993 and 1994 and historical statement of operations data for
the period from March 19, 1993 (inception) through December 31, 1993 are derived
from CELCORE's audited financial statements which are not included in this
Prospectus/Proxy Statement. CELCORE's financial information should be read in
conjunction with CELCORE's financial statements and notes thereto included
elsewhere herein. The selected financial data as of September 30, 1997 and for
the nine months ended September 30, 1996 and 1997 have been derived from
unaudited financial statements included elsewhere herein and, reflect, in the
opinion of the management of CELCORE, all adjustments necessary to present
fairly CELCORE's financial position and results of operations. Such adjustments
are of a recurring nature unless otherwise disclosed therein. Interim results
are not necessarily indicative of results which may be expected for any other
period or the full fiscal year.
 
                                 CELCORE, INC.
 
                       SELECTED HISTORICAL FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                                  NINE MONTHS ENDED
                                                              YEAR ENDED DECEMBER 31,               SEPTEMBER 30,
                                                     -----------------------------------------   -------------------
                                                     1993(1)(2)   1994(2)    1995       1996       1996       1997
                                                     ----------   -------   -------   --------   --------   --------
                                                                                                     (UNAUDITED)
<S>                                                  <C>          <C>       <C>       <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
Net revenues.......................................    $   8      $2,166    $ 4,908   $  3,680   $  2,756   $  9,485
Gross profit.......................................        8       1,457      3,146      2,329      1,837      3,766
Operating loss.....................................     (285)       (719)    (4,509)   (15,139)   (10,370)   (12,353)
Net loss...........................................    $(281)     $ (714)   $(4,273)  $(14,631)  $(10,028)  $(12,378)
                                                       =====      ======    =======   ========   ========   ========
Net loss per share(3)..............................      N/A         N/A    $ (0.81)  $  (2.69)  $  (1.85)  $  (2.26)
                                                                            =======   ========   ========   ========
Weighted average common shares outstanding(3)......      N/A         N/A      5,500      5,502      5,500      5,533
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                                        AS OF
                                                                AS OF DECEMBER 31,                  SEPTEMBER 30,
                                                     -----------------------------------------   -------------------
                                                        1993       1994      1995       1996       1996       1997
                                                     ----------   -------   -------   --------   --------   --------
                                                                                                     (UNAUDITED)
<S>                                                  <C>          <C>       <C>       <C>        <C>        <C>
BALANCE SHEET DATA:
Cash and cash equivalents..........................    $ 430      $2,315    $14,468   $ 12,056   $ 19,785   $    619
Working capital....................................       98       2,271     16,558     15,304     21,244      1,100
Total assets.......................................      576       3,313     20,910     22,827     27,287     17,972
Short-term and long-term debt......................       --          --         --        829        912      2,836
Convertible redeemable preferred stock.............       --       3,163     23,189     39,293     39,146     39,439
Shareholders' equity (deficit)(4)..................      219        (507)    (4,951)   (19,768)   (15,108)   (32,202)
</TABLE>
 
- ---------------
 
(1) Financial results are from March 19, 1993 (commencement of operations)
    through December 31, 1993. From CELCORE's incorporation in September 1992 to
    March 19, 1993, CELCORE had no operations and accordingly, financial
    information for this period is not presented.
 
(2) CELCORE was the general partner of Celcore L.P until November 1994, when it
    succeeded to the business of Celcore L.P. as a result of a reorganization.
    Accordingly, loss per share data is not presented for 1993 and 1994, as it
    would not be meaningful.
 
(3) Net loss per share is based upon the weighted average number of shares of
    common stock outstanding for each period. Common equivalent shares do not
    include common shares issuable upon conversion of CELCORE's preferred stock
    or common shares issuable, net of the treasury stock effect, upon the
    exercise of options as the effect of these common equivalent shares are
    antidilutive. Net loss per share has been adjusted for the accretion of the
    redeemable preferred stock.
 
(4) Since its inception, CELCORE has not declared or paid a cash dividend.
                                       17
<PAGE>   24
 
                                DSC AND CELCORE
 
         SELECTED UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
     The following selected unaudited pro forma combined condensed statement of
operations data combines DSC's and CELCORE's historical consolidated results of
operations for the year ended December 31, 1996 and for the nine-month period
ended September 30, 1997, giving effect to the Merger as if it had occurred at
January 1, 1996. The following selected unaudited pro forma combined condensed
balance sheet data combines DSC's and CELCORE's historical consolidated balance
sheet data as of September 30, 1997, giving effect to the Merger as if it had
occurred as of September 30, 1997. The unaudited pro forma combined condensed
financial information is presented for informational purposes only and may not
be indicative of the financial position or results of operations as they would
have been if DSC and CELCORE had been a single entity during the periods
presented, nor is it necessarily indicative of the result of operations which
may occur in the future. Anticipated efficiencies from the consolidation of DSC
and CELCORE are not fully determinable and have been excluded from the amounts
included in the pro forma amounts presented below. See "Unaudited Pro Forma
Combined Financial Statements" and accompanying notes thereto.
 
<TABLE>
<CAPTION>
                                                                                 NINE
                                                               YEAR ENDED    MONTHS ENDED
                                                              DECEMBER 31,   SEPTEMBER 30,
                                                                  1996           1997
                                                              ------------   -------------
<S>                                                           <C>            <C>
UNAUDITED PRO FORMA COMBINED CONDENSED STATEMENT OF
  OPERATIONS DATA:
  Revenues..................................................   $1,384,571      $1,139,859
  Gross profit..............................................      457,473         472,723
  Operating income (loss)...................................      (30,307)         92,114
  Net income (loss).........................................      (25,311)         71,711
  Income (loss) per share...................................   $    (0.21)     $     0.57
  Weighted average common shares outstanding................      122,317         125,498
</TABLE>
 
<TABLE>
<CAPTION>
                                                                  AS OF
                                                              SEPTEMBER 30,
                                                                  1997
                                                              -------------
<S>                                                           <C>
UNAUDITED PRO FORMA COMBINED CONDENSED BALANCE SHEET DATA:
  Cash and marketable securities............................   $  675,892
  Working capital...........................................    1,131,855
  Property and equipment, net...............................      448,681
  Total assets..............................................    2,449,796
  Short-term and long-term debt.............................      665,448
  Shareholders' equity......................................    1,267,338
</TABLE>
 
                                       18
<PAGE>   25
 
                      COMPARATIVE HISTORICAL AND UNAUDITED
                            PRO FORMA PER SHARE DATA
 
     The following table sets forth certain historical per share data of DSC and
CELCORE and combined per share data on an unaudited pro forma basis after giving
effect to the Merger based on the purchase method of accounting assuming that
 .32 of a share of DSC Common Stock is issued in exchange for each share of
CELCORE Capital Stock. See "Certain Provisions of the Merger
Agreement -- Conversion of Securities." This data should be read in conjunction
with the selected historical financial data and the historical financial
statements of DSC and CELCORE and the notes thereto that are either included
elsewhere herein or incorporated herein by reference. The selected pro forma
combined financial information of DSC and CELCORE is derived from the Unaudited
Pro Forma Combined Financial Statements and should be read in conjunction with
such pro forma statements and notes thereto included elsewhere herein. The pro
forma information is presented for illustrative purposes only and is not
necessarily indicative of the combined financial position or results of
operations of future periods or the results that actually would have been
realized had the entities been a single entity during the periods presented.
Since inception, neither DSC nor CELCORE has declared or paid a cash dividend.
Accordingly, no cash dividends declared per share data is presented below.
 
<TABLE>
<CAPTION>
                                                                              NINE MONTHS
                                                               YEAR ENDED        ENDED
                                                              DECEMBER 31,   SEPTEMBER 30,
                                                                  1996           1997
                                                              ------------   -------------
<S>                                                           <C>            <C>
DSC Historical Per Common Share:
  Net income (loss).........................................     $(0.06)        $  0.73
  Book value(1).............................................       9.79           10.55
CELCORE Historical Per Common Share:
  Net loss..................................................     $(2.69)        $ (2.26)
  Book value(2).............................................       1.08            0.40
Pro Forma Combined -- Per DSC Share (unaudited):
  Net income (loss).........................................     $(0.21)        $  0.57
  Book value(1).............................................        N/A           10.24
Equivalent Pro Forma Combined -- Per CELCORE Share
  (unaudited):(3)
  Net income (loss).........................................     $(0.07)        $  0.18
  Book value................................................        N/A            3.28
</TABLE>
 
- ---------------
 
(1) DSC's historical book value per share is computed by dividing shareholders'
    equity by the number of shares of common stock outstanding at the end of
    each period. DSC pro forma book value per share is computed by dividing pro
    forma shareholders' equity, including the effect of pro forma adjustments,
    by the pro forma number of shares of DSC Common Stock outstanding at the end
    of the period.
 
(2) The computation of CELCORE's historical book value per share includes the
    carrying value of redeemable preferred stock and the assumed conversion of
    all series of preferred stock on a one-for-one basis, based on the
    requirement in the Merger Agreement that all common and preferred stock
    shares will be exchanged based on a common exchange ratio.
 
(3) The unaudited equivalent CELCORE pro forma per share amounts are calculated
    by multiplying the DSC combined pro forma per share amounts by the assumed
    Exchange Ratio of .32.
                                       19
<PAGE>   26
 
                                  RISK FACTORS
 
     CELCORE stockholders should carefully evaluate all of the information
contained and incorporated by reference in this Prospectus/Proxy Statement and,
in particular, the following:
 
POTENTIAL EFFECTS OF THE MERGER
 
     DSC believes the Merger will improve DSC's long-term consolidated operating
performance. However, the success of the Merger will depend upon many factors,
including, the timely completion of the development of CELCORE's new GSM switch
product, acceptance of the product in selected international markets, and the
achievement of certain operating efficiencies. Failure to successfully achieve
any of these objectives, including a delay in attaining them, could adversely
effect DSC's financial results. Additionally, DSC expects that its consolidated
short term earnings will not be significantly affected as a result of the Merger
other than the effect resulting from the in-process research and development
write-off described herein. However, the issuance of DSC Common Stock to
CELCORE's stockholders in the Merger will be dilutive to DSC's earnings.
Accordingly, there can be no assurance that DSC's financial results and earnings
per share will not be negatively effected as a result of the Merger. See
"-- Quarterly Earnings Fluctuations."
 
     In addition, there can be no assurance that the combining of the two
companies' businesses, even if achieved in an efficient, effective manner, will
result in combined results of operations superior to what would have been
achieved by each company independently, or as to the period of time required to
achieve such result, if any. Accordingly, there can be no assurance that
stockholders of CELCORE would not achieve greater returns on investment if
CELCORE were to remain an independent company. See "The Merger -- Background of
the Merger" and "-- CELCORE's Reasons for the Merger; Recommendation of
CELCORE's Board of Director's."
 
CUSTOMER CONCENTRATION
 
     DSC has a diversified customer base including long distance carriers, RHCs,
Motorola, Inc., international PTTs and other domestic and international
independent telephone companies. However, a large portion of DSC's revenue is
concentrated among several of DSC's larger customers. During 1996, revenue from
DSC's three largest customers in total accounted for approximately 39% of DSC's
consolidated revenue. Although DSC expects that these customer relationships
will continue to generate substantial revenue in the near term, there can be no
assurance that any of these customers will continue to purchase products, or
continue to purchase products at historical levels. Product orders generally are
subject to rescheduling and cancellation without penalty. A material reduction
in the purchases of DSC's products by any of DSC's significant customers could
have a material adverse effect on DSC.
 
PRODUCT OBSOLESCENCE AND IMPORTANCE OF NEW PRODUCTS
 
     The industry in which DSC operates is characterized by rapidly changing
technological and market conditions, which may shorten product life cycles.
DSC's future competitive position and operating results depend upon successful
production and sales of its existing products, its ability to develop and
produce on a timely basis new products to meet existing and anticipated industry
demands, and its ability to reduce the costs of existing systems, software and
services. During the product development process, DSC is required to make a
substantial investment in research and development, capital and, at times,
inventory for products that often require extensive field testing and evaluation
prior to actual sales to its customers. Delays in product completion and/or
slower than expected market acceptance of certain products have negatively
impacted DSC's operating performance in the past and also, in certain cases,
resulted in adjustments to carrying values of assets, including the majority of
the non-cash special charge in the third quarter of 1996. In addition, when
DSC's products are eventually sold to customers, there can be no assurance that
such products will be profitable. DSC may be materially adversely affected if it
is unable to develop and produce on a timely basis new products to meet existing
and industry demands, if substantial delays in the availability of new products
occur, or if any of DSC's existing or new products are not commercially
successful and DSC is therefore required to adjust the carrying value, or
discontinue such product.
 
                                       20
<PAGE>   27
 
TIMELY AND ADEQUATE SUPPLY OF MATERIALS
 
     DSC generally uses standard parts and components for its products and
believes that, in most cases, there are a number of alternative, qualified
vendors for most of those parts and components. DSC purchases certain custom
components and products from single suppliers. DSC believes that the
manufacturers of the particular custom components and products should be able to
meet expected future demands. Recent changes in silicon wafer and other
electronic component technologies have required DSC to evaluate the feasibility
of "lifetime" purchases of certain component materials. Such "lifetime"
purchases may or may not be sufficient to fulfill customer demand.
Alternatively, DSC could be required to find second sourcing of these component
materials or modify existing product designs. Although DSC has not experienced
any material adverse effects from the inability to obtain timely delivery of
needed components, an unanticipated interruption of DSC's ability to secure
comparable components could have a material adverse effect on DSC's revenues and
profitability. In addition, certain of DSC's products contain a number of
subsystems or components acquired from other manufacturers on an original
equipment manufacturer ("OEM") basis. These OEM products are often available
only from a limited number of manufacturers. In the event that an OEM product
was no longer available from a current OEM vendor, second sourcing would be
required and could delay customer deliveries which could have a material adverse
effect on DSC's revenues and profitability.
 
COMPETITION
 
     DSC currently faces significant competition in its markets and expects that
the level of price and product competition will increase. In addition, as a
result of both the trend toward global expansion by foreign and domestic
competitors and technological and public policy changes, DSC anticipates that
new and different competitors will enter its markets. These competitors may
include entrants from the telecommunications, software and data networking
industries. DSC believes that it enjoys a strong competitive position due to its
large installed base, its strong relationship with key customers and its
technological leadership and new product development capabilities. However, many
of DSC's foreign and domestic competitors have more extensive engineering,
manufacturing, marketing, financial and personnel resources than those of DSC.
DSC's ability to compete is dependent upon several factors, including, but not
limited to, product features, innovation, quality, reliability, service,
support, price and the retention and attraction of qualified design and
development personnel.
 
QUARTERLY EARNINGS FLUCTUATIONS
 
     DSC's operating results may fluctuate significantly from quarter to quarter
due to several factors. As is the case with other companies in the
telecommunications manufacturing industry, a large portion of customer purchase
orders are received and shipments occur in the latter part of most quarters. As
a result, revenue and earnings can fluctuate significantly from quarter to
quarter based on customer requirements and the timing of orders and shipments.
In addition, periodic operating results may be materially affected by shifts in
the mix of products delivered, including the amount of software content, the
impact of sales price changes, the timing of satisfactory completion of
development and testing of new products and product enhancements and adjustments
in the carrying value, or the discontinuation, of any of DSC's products. See
"-- Product Obsolescence and Importance of New Products." DSC has historically
experienced a stronger demand for its products in the fourth quarter and a lower
demand for its products in the first quarter; however, there is no assurance
this will continue in the future. In addition, DSC currently estimates that
approximately $135.0 million of the purchase price paid for CELCORE will be
allocated to in-process research and development which will be charged to
expense in the period the Merger is consummated, currently estimated to be the
fourth quarter of 1997.
 
INTERNATIONAL GROWTH AND FOREIGN EXCHANGE
 
     The international marketplace has become an increasingly important source
of new business opportunities for DSC as potential growth rates of some
international markets are higher than those of the United States. However,
access to customers in international markets is often more difficult due to a
variety of factors including the established relationships between the national
service providers, some of which are currently or
 
                                       21
<PAGE>   28
 
were formerly government-owned or -controlled, and their traditional indigenous
suppliers of telecommunications equipment. There can be no assurance that DSC
will be able to overcome these barriers. In addition, pursuit of customers in
international markets may require significant investments for an extended period
before returns on such investments, if any, are realized. DSC also has
manufacturing operations at several locations outside the United States. Such
business, investment and operating activities could be materially adversely
affected by economic and labor conditions, political instability, tax laws
(including U.S. taxes on foreign subsidiaries) and changes in the value of the
United States dollar versus the local currency in which products are sold. A
significant change in the value of the dollar against the currency of one or
more countries where DSC recognizes substantial revenue or earnings may
materially adversely affect DSC's operating results. DSC attempts to mitigate
this risk through the use of forward foreign exchange contracts where possible,
although there can be no assurances that such attempts will be successful.
 
KEY PERSONNEL
 
     DSC is dependent upon the continued services and management experience of
certain of their senior management personnel. If DSC were to lose the services
of such senior management personnel, it could have a material adverse effect on
DSC.
 
INTELLECTUAL PROPERTY AND LICENSING
 
     DSC's proprietary technology is a key component of the value of its
products. DSC has an established program to protect its proprietary information
through patent, trademark, copyright and trade secret procedures. DSC currently
has patents issued to it and numerous patent applications pending in the United
States and foreign countries. There is no guarantee that the pending
applications will mature into issued patents or that the patents issued will be
held valid or will provide competitive advantage to DSC in the respective
jurisdictions if challenged or circumvented. The laws of some foreign countries
do not extend the same level of protection for intellectual property as do the
laws of the United States. While DSC believes that the protection of its
intellectual property by patents, copyrights and trade secrets has value, it
also believes the continued innovative skills technological expertise and
management abilities of its employees underlies the success of DSC.
 
     Because of the rapid rate of technological innovation in the
telecommunications industry, the high numbers of patents being applied for
internationally and delays in various patent offices, it is not possible to
anticipate whether each of DSC's products or any of their respective components
may be covered by a patent applied for or issued to a third party. From time to
time DSC receives notice from third parties regarding patent or other
intellectual property claims. If infringement is alleged, DSC believes that,
based upon industry practice, any necessary license or rights from a third party
may be obtained on terms that would not have a material adverse effect on DSC's
financial condition or its results of operations. Nevertheless, there can be no
assurance that the necessary licenses would be available on acceptable terms, if
at all, or that DSC would prevail in any challenge by a third party. The
inability to obtain certain licenses or other rights or to obtain such licenses
or rights on favorable terms, or litigation arising out of such other parties'
assertion, could have a material adverse effect on DSC's business, operating
results and financial condition.
 
VOLATILITY OF DSC STOCK PRICE
 
     The market price of DSC Common Stock has been, and may continue to be,
volatile. Factors such as new product announcements by DSC or its competitors,
quarterly fluctuations in the operating results of DSC, its competitors and
other technology companies may have a significant impact on the market price of
the DSC Common Stock. In particular, if DSC were to report operating results
which did not meet the expectations of the research analysts, the market price
of DSC Common Stock could be materially adversely affected. From time to time,
the stock market has experienced extreme price and volume fluctuations, which
have particularly affected the market prices for many high technology companies
and which have often been unrelated to the operating performance of the specific
companies.
 
                                       22
<PAGE>   29
 
STOCK ESCROW
 
     At the Effective Time, DSC will deposit into escrow, certificates
representing that number of shares equal to 5.333% of the shares of DSC Common
Stock to be issued to the holders of CELCORE Capital Stock (other than holders
of Dissenting Shares) in the Merger as security for the indemnification
obligations of CELCORE stockholders set forth in Article IX of the Merger
Agreement and the costs and expenses incurred by the Representative in
performing his duties under the escrow provisions of the Merger Agreement.
Subject to the foregoing indemnification obligations of CELCORE stockholders,
such shares will not be released from the Escrow Funds until the Expiration Date
and, therefore, will be subject to fluctuations in the market value of the DSC
Common Stock during the Escrow Period. To the extent such escrowed shares are
used to satisfy the indemnification obligations of CELCORE, the CELCORE
stockholders may receive up to 5.333% fewer shares based upon the Exchange Ratio
than they would have otherwise received following the Effective Time. Further,
the CELCORE stockholders will be obligated to indemnify the Representative for
losses, liabilities or expense he may incur without negligence or bad faith in
connection with the acceptance or administration of his duties as the
Representative. See "Certain Provisions of the Merger Agreement -- Escrow and
Indemnification."
 
IMPACT OF REGULATION
 
     The telecommunications industry is subject to regulation in the United
States and other countries. Federal and state regulatory agencies, including the
Federal Communications Commission and the various state Public Utility
Commissions and Public Service Commissions, regulate most of DSC's domestic
customers. In addition, the RHCs are restricted by the terms of the Modified
Final Judgment which resulted from the court-ordered divestiture of the RHCs by
AT&T Corporation, and which prohibited the RHCs from manufacturing
telecommunications equipment and providing interexchange or long-distance
services. In early 1996, the Telecommunications Act of 1996 (the "1996
Legislation") was passed. The 1996 Legislation contains provisions that permit
the RHCs, subject to satisfying certain conditions, to manufacture
telecommunications equipment. One or more RHCs may decide to manufacture
telecommunications equipment, to design and provide telecommunications software,
or to form alliances with other manufacturers, any of which could result in
increased competition for DSC and reduce the RHCs' and other customers'
purchases from DSC. There can be no assurance that deregulation will continue in
the future or that future deregulation will not have a material adverse effect
on DSC.
 
MULTI-YEAR AGREEMENTS
 
     As part of its ongoing operations, DSC periodically enters into agreements
with customers which have a duration of greater than one year. Certain of these
agreements have included requirements to develop new technologies, including
hardware and software, as well as requirements to provide installation of
infrastructure systems. Certain of these agreements also contain performance
criteria, which, if not satisfied, could subject DSC to substantial penalties,
damages or non-payment, or could result in termination of such agreements.
 
CERTAIN ANTI-TAKEOVER EFFECTS
 
     DSC has adopted a stockholder rights plan, which may make an unsolicited
acquisition of DSC more difficult or expensive. See "Description of Capital
Stock and Comparison of Stockholders' Rights -- Anti-Takeover Provisions;
Restrictions on Certain Business Combinations."
 
INTERESTS OF CERTAIN PERSONS; POSSIBLE CONFLICTS OF INTERESTS OF CERTAIN PERSONS
IN THE MERGER
 
     Certain members of the management of CELCORE and the Board of Directors of
CELCORE have interests in the Merger that differ from, and are in addition to,
their interests as stockholders of CELCORE. In particular, 20% of the BFG
Options will vest immediately prior to the consummation of the Merger. The
directors and executive officers of CELCORE and certain of their affiliates are
also obligated to vote or direct the vote of all of the outstanding shares of
CELCORE Capital Stock over which they have voting control (and to execute
written consents with respect to such shares) in favor of the approval of the
Merger Agreement, the
 
                                       23
<PAGE>   30
 
payments under the Employment Agreements and, to the extent such directors,
officers and affiliates are holders of CELCORE Preferred Stock, the waiver of
their Liquidation Rights under CELCORE's Certificate of Incorporation and
Certificates of Designations. See "The Merger -- Interests of Certain Persons;
Possible Conflicts of Interest" and "Voting Agreements."
 
                              THE SPECIAL MEETING
 
GENERAL
 
     This Prospectus/Proxy Statement is being furnished to stockholders of
CELCORE in connection with the solicitation of proxies by the Board of Directors
of CELCORE for use at the Special Meeting of stockholders to be held on December
15, 1997 at 10:00 a.m., central time, at 3800 Forest Hill-Irene Road, Memphis,
Tennessee 38125, and at any adjournments or postponements thereof.
 
     This Prospectus/Proxy Statement also constitutes the Prospectus with
respect to the shares of DSC Common Stock issuable in connection with the
Merger.
 
PURPOSE OF THE SPECIAL MEETING
 
     At the Special Meeting, holders of shares of CELCORE Capital Stock will
consider and vote upon a proposal to approve and adopt the Merger Agreement and
the payments under the Employment Agreements. Additionally, the holders of
CELCORE Preferred Stock will consider and vote upon a proposal to waive any
Liquidation Rights of the holders of CELCORE Preferred Stock. CELCORE's
stockholders will also transact such other business as may properly be brought
before the Special Meeting or any adjournments or postponements thereof. THE
BOARD OF DIRECTORS OF CELCORE HAS UNANIMOUSLY APPROVED THE MERGER AGREEMENT AND
THE PAYMENTS UNDER THE EMPLOYMENT AGREEMENTS AND RECOMMENDS THAT CELCORE'S
STOCKHOLDERS VOTE FOR APPROVAL AND ADOPTION OF THE MERGER AGREEMENT AND THE
PAYMENTS UNDER THE EMPLOYMENT AGREEMENTS. THE BOARD OF DIRECTORS OF CELCORE ALSO
RECOMMENDS THAT THE HOLDERS OF CELCORE PREFERRED STOCK WAIVE THEIR LIQUIDATION
RIGHTS.
 
VOTE REQUIRED
 
     The affirmative vote of the holders of a majority of the shares of CELCORE
Common Stock and the Series A Preferred Stock, voting together as a single
class, and the affirmative vote of 60% of all outstanding shares of Series B
Preferred Stock, Series C Preferred Stock and Series D Preferred Stock, voting
separately as single classes, represented and entitled to vote at the Special
Meeting or any adjournment thereof, is required to approve the Merger Agreement.
The payments under the Employment Agreements require approval by the affirmative
vote of the holders of more than 75% of the outstanding shares of CELCORE
Capital Stock (excluding shares held by Messrs. Berger, Foley and Gonzalez and
certain of their related parties), voting together as a single class,
represented and entitled to vote at the Special Meeting or any adjournment
thereof. The approval of the payments under the Employment Agreements is not a
condition to the consummation of the Merger. In addition, the approval of the
waiver of the Liquidation Rights by the holders of CELCORE Preferred Stock will
require the affirmative vote of the holders of 80% of the outstanding shares of
CELCORE Preferred Stock, voting together as a single class, represented and
entitled to vote at the Special Meeting or any adjournment thereof. Abstentions
(i.e., votes withheld by stockholders who are present and entitled to vote) from
voting on the Merger Agreement, the payments under the Employment Agreements and
the waiver of the Liquidation Rights of the holders of CELCORE Preferred Stock
will be included in the voting tally. As a result, abstentions and failures to
vote will have the same effect as votes against the Merger Agreement, the
payments under the Employment Agreements and the waiver of the Liquidation
Rights of the holders of CELCORE Preferred Stock since they are not votes for
approval. The Principal Stockholders have entered into agreements with DSC
whereby they have agreed to vote the Principal Stockholder Shares and to execute
written consents with respect to such shares in favor of approval
 
                                       24
<PAGE>   31
 
of the Merger Agreement, the payments under the Employment Agreements and any
matter which could reasonably be expected to facilitate the Merger. Furthermore,
each Principal Stockholder who is a holder of CELCORE Preferred Stock has also
waived, and agreed to vote such shares and to execute written consents with
respect to such shares in favor of the approval of the waiver of, the
Liquidation Rights as provided in CELCORE's Certificate of Incorporation and
Certificates of Designations. Each Principal Stockholder has also agreed not to
take any action to perfect any appraisal rights it may have under Section 262 of
the DGCL. Pursuant to the Voting Agreements, the Principal Stockholders Shares
(representing as of the Record Date approximately 96% of the outstanding shares
of CELCORE Common Stock, 68% of the outstanding shares of Series A Preferred
Stock, 93.6% of the outstanding shares of Series B Preferred Stock, 71.1% of the
outstanding shares of Series C Preferred Stock and 100% of the outstanding
shares of Series D Preferred Stock) will be present and vote at the Special
Meeting in favor of the Merger Agreement, the payments under the Employment
Agreements and the waiver of the Liquidation Rights by the holders of CELCORE
Preferred Stock. Therefore, no additional votes from the holders of CELCORE
Capital Stock are necessary to approve the Merger Agreement or the payments
under the Employment Agreements. In addition, no additional votes from the
holders of CELCORE Preferred Stock are necessary to approve the waiver of the
Liquidation Rights. See "Voting Agreements," "Proposal to Approve the Payments
Under the Employment Agreements" and "Proposal to Approve the Waiver of
Liquidation Rights by Holders of CELCORE Preferred Stock."
 
VOTING OF PROXIES
 
     Shares of CELCORE Common Stock and CELCORE Preferred Stock represented by
properly executed proxies received at or prior to the Special Meeting, and which
have not thereafter been properly revoked as described below, will be voted in
accordance with the instructions indicated therein. If no instructions are
indicated, such proxies will be voted FOR approval and adoption of the Merger
Agreement, FOR approval of the payments under the Employment Agreements, FOR
approval of the waiver of Liquidation Rights by the holders of CELCORE Preferred
Stock, and in the discretion of the proxy holder as to any other matter that may
properly come before the Special Meeting.
 
REVOCABILITY OF PROXIES
 
     A CELCORE stockholder who has given a proxy may revoke such proxy at any
time prior to its exercise at the Special Meeting by any manner permitted by
law, including (i) giving written notice of revocation by mail or facsimile to
CELCORE prior to the Special Meeting, (ii) properly submitting to CELCORE by
mail or facsimile a duly executed proxy bearing a later date, or (iii) voting in
person at the Special Meeting. Submissions to CELCORE should be made to Celcore,
Inc., Attn: Corporate Secretary, at 3800 Forest Hill -- Irene Road, Memphis,
Tennessee 38125, facsimile number (901) 624-4100.
 
SOLICITATION OF PROXIES
 
     Each of DSC and CELCORE agreed to pay its own expenses incurred in
connection with this Prospectus/Proxy Statement and the Special Meeting
including without limitation, the fees and disbursements of their respective
counsel, accountants and other representatives, except that DSC has agreed to
pay any printing, filing and other fees and expenses associated with this
Prospectus/Proxy Statement and the Special Meeting.
 
RECORD DATE; SHARES ENTITLED TO VOTE
 
     The close of business on October 16, 1997 has been fixed as the Record Date
for determining holders of CELCORE Capital Stock entitled to notice of and to
vote at the Special Meeting. As of the Record Date, (i) 5,592,250 shares of
CELCORE Common Stock were outstanding and held of record by 47 holders, (ii)
4,500,000 shares of Series A Preferred Stock were outstanding and held of record
by 16 holders, (iii) 3,000,000 shares of Series B Preferred Stock were
outstanding and held of record by 33 holders, (iv) 3,038,046 shares of Series C
Preferred Stock were outstanding and held of record by 45 holders and (v)
2,004,227 shares of Series D Preferred Stock were outstanding and held of record
by one holder. Each
 
                                       25
<PAGE>   32
 
stockholder of record of CELCORE Common Stock as of the close of business on the
Record Date is entitled at the Special Meeting to one vote for each share of
CELCORE Common Stock held. Each stockholder of record of CELCORE Preferred Stock
as of the close of business on the Record Date is entitled to a number of votes
equal to the number of whole shares of CELCORE Common Stock into which such
shares of CELCORE Preferred Stock could be converted on the Record Date. As of
the Record Date, each share of CELCORE Preferred Stock was convertible into one
share of CELCORE Common Stock. CELCORE Common Stock and CELCORE Preferred Stock
are the only classes of capital stock of CELCORE issued and outstanding.
 
QUORUM
 
     The presence, in person or by proxy, of the holders of a majority of the
outstanding shares of CELCORE Common Stock and CELCORE Preferred Stock (with
each series computed on an as converted basis) entitled to vote at the Special
Meeting is necessary to constitute a quorum for the transaction of business at
the Special Meeting. Abstentions will be counted as present for purposes of
determining whether there is a quorum for the transaction of business.
 
                                       26
<PAGE>   33
 
                                   THE MERGER
 
GENERAL
 
     The Merger Agreement provides for a business combination between DSC and
CELCORE in which a wholly owned subsidiary of DSC would be merged with and into
CELCORE and the holders of CELCORE Capital Stock would be issued shares of DSC
Common Stock. In addition, all CELCORE Options outstanding under the 1995 Plan
and the 1996 Plan, except for certain BFG Options, will be assumed by DSC and
will be converted into an option to acquire DSC Common Stock. See "The
Merger -- Interests of Certain Persons; Possible Conflicts of Interest." As a
result of the Merger, CELCORE would become a wholly owned subsidiary of DSC. A
copy of the Merger Agreement is attached to this Prospectus/Proxy Statement as
Appendix A and is incorporated herein by reference.
 
BACKGROUND OF THE MERGER
 
     Between March 1997 and June 1997, DLJ was engaged by CELCORE to assist
CELCORE in its consideration of an initial public offering and in connection
therewith, DLJ assisted CELCORE in the drafting of a draft S-1 registration
statement. As part of this process, DLJ conducted extensive due diligence,
reviewed projections and monitored CELCORE's progress related to its business
plan. CELCORE planned to file the S-1 in the latter half of 1997, after
completion of the preparation of CELCORE's June or September quarterly financial
statements.
 
     On June 24, 1997, CELCORE, DLJ and DSC met in Memphis to discuss the
possible acquisition of CELCORE by DSC. These discussions were the result of an
inquiry made by DSC regarding one of CELCORE's products in the fall of 1996.
After the June 24th meeting, discussions between DSC and CELCORE were not
resumed until July 21, 1997, when Broadview Associates (financial advisor to
DSC), DLJ and CELCORE met in New York City. During this time, CELCORE and DLJ
also had preliminary discussions with several other potential buyers. Further
discussions between CELCORE and DSC were held by telephone on August 11, 1997
and on August 14, 1997 in Dallas. During the meeting, the parties agreed to the
general terms of the Merger Agreement, including the price to be paid by DSC.
These terms were outlined in a letter of intent dated September 17, 1997.
 
     Between September 18, 1997 and October 29, 1997, DSC, CELCORE and DLJ, and
their respective legal counsels met in Dallas on several occasions and carried
on numerous telephone conferences in order to negotiate the definitive Merger
Agreement. During this period, due diligence was conducted by DSC and certain
ancillary documents and schedules were also prepared and finalized.
 
CELCORE'S REASONS FOR THE MERGER; RECOMMENDATION OF CELCORE'S BOARD OF DIRECTORS
 
     The Board of Directors of CELCORE has unanimously determined that the terms
of the Merger Agreement and the transactions contemplated thereby offer the best
opportunity to maximize stockholder value for the holders of CELCORE Common
Stock based on the stock value of the combined companies and are in the best
interests of CELCORE and its stockholders. Accordingly, the Board of Directors
of CELCORE has unanimously approved the Merger Agreement and the payments under
the Employment Agreements and recommends approval thereof by the stockholders of
CELCORE. The Board of Directors of CELCORE also recommends approval of the
waiver of Liquidation Rights by the holders of CELCORE Preferred Stock. In
reaching its determination, the Board of Directors of CELCORE consulted with
CELCORE management, as well as its legal counsel and its financial advisors, and
considered a number of factors, including, without limitation, the following:
 
     (i)    an evaluation of the prospects of CELCORE on a stand-alone basis;
 
     (ii)   CELCORE's immediate and projected cash needs and the availability
            from third parties of funding required for CELCORE to continue to
            operate on a stand-alone basis;
 
     (iii)  DSC's ability to provide the financial and technical assistance to
            support the completion of CELCORE's GSM system;
 
                                       27
<PAGE>   34
 
     (iv)   the historical market prices, volatility and trading information
            with respect to DSC Common Stock, and the opportunity for future
            liquidity for CELCORE's stockholders through their ownership of DSC
            Common Stock, which is quoted on the NASDAQ National Market;
 
     (v)    the opportunity afforded CELCORE's stockholders to share in the
            potential cost savings achieved through consolidation;
 
     (vi)   the balance sheet strength of the combined company relative to
            CELCORE's stand-alone balance sheet;
 
     (vii)  the Exchange Ratio between DSC Common Stock and CELCORE Capital
            Stock, which the Board of Directors of CELCORE believed would result
            in enhanced value for CELCORE's stockholders;
 
     (viii) the expected tax-free nature of the Merger;
 
     (ix)   the savings in the general and administrative as well as sales and
            marketing expenses, which would enable CELCORE to utilize DSC's
            infrastructure and therefore invest more in research and development
            than it would otherwise be able to invest;
 
     (x)    an evaluation of other strategic alternatives potentially available
            to CELCORE, including an initial public offering and other merger
            opportunities;
 
     (xi)   information concerning, and their knowledge of, CELCORE's and DSC's
            respective business, prospects, historical financial performances
            and conditions, operations, technologies, management, competitive
            positions, products, customers and future development plans;
 
     (xii)  the consideration to be received by CELCORE's stockholders in the
            Merger and the market value of the shares of DSC Common Stock to be
            issued in exchange for CELCORE Capital Stock and upon exercise of
            outstanding CELCORE Options;
 
     (xiii) the terms of the Merger Agreement;
 
     (xiv)  the compatibility of the management and businesses of CELCORE and
            DSC, as well as the fact that certain members of CELCORE's senior
            management would manage the operations relating to CELCORE's 
            products and business for the combined company;
 
     (xv)   the potential disruption of CELCORE's business that might result 
            from employee uncertainty and lack of focus following announcement
            of the Merger and during the integration of the operations of DSC 
            and CELCORE;
 
     (xvi)  the possibility that the Merger might not be consummated, and the
            effects of the public announcement of the Merger on CELCORE's sales
            and operating results, its ability to attract and retain key
            management, and marketing and technical personnel and the progress
            of certain of its development projects;
 
     (xvii) the possibility of management disruption associated with the Merger
            and the risk that, despite the efforts of the combined company, the
            combined company may not be able to retain key technical, sales and
            management personnel of CELCORE;
 
     (xviii)the risk that the benefits sought to be achieved by the Merger will
            not be achieved; and
 
     (xix)  other risks described above under "Risk Factors."
 
     Based on the opinion of DLJ to the effect that, from a financial point of
view, the consideration to be received by CELCORE's stockholders upon
consummation of the Merger is fair to such stockholders, and on the foregoing
matters and such other matters as were deemed relevant, the Board of Directors
of CELCORE unanimously approved the Merger as being in the best interests of
CELCORE's stockholders.
 
     The foregoing discussion of the information and factors considered and
given weight by the Board of Directors of CELCORE is not intended to be
exhaustive but is believed to include the material factors the
 
                                       28
<PAGE>   35
 
Board of Directors of CELCORE considered. In addition, in reaching the
determination to approve and recommend the Merger, considering the wide variety
of factors considered in connection with its evaluation of the proposed Merger,
the Board of Directors of CELCORE did not find it practical to, and did not,
quantify or otherwise attempt to assign any relative or specific weights to the
foregoing factors, and individual CELCORE directors may have given different
weights to different factors.
 
     THE BOARD OF DIRECTORS OF CELCORE UNANIMOUSLY RECOMMENDS THAT THE
STOCKHOLDERS OF CELCORE VOTE FOR APPROVAL AND ADOPTION OF THE MERGER AGREEMENT,
THE PAYMENTS UNDER THE EMPLOYMENT AGREEMENTS AND, AS CONTEMPLATED THEREBY,
APPROVAL OF THE MERGER. ADDITIONALLY, THE BOARD OF DIRECTORS OF CELCORE
UNANIMOUSLY RECOMMENDS THAT THE HOLDERS OF CELCORE PREFERRED STOCK VOTE FOR THE
WAIVER OF THE LIQUIDATION RIGHTS AS PROVIDED IN CELCORE'S CERTIFICATE OF
INCORPORATION AND CERTIFICATES OF DESIGNATIONS.
 
OPINION OF FINANCIAL ADVISOR TO CELCORE
 
     In its role as financial advisor to CELCORE, DLJ was asked by CELCORE to
render an opinion to CELCORE's Board of Directors as to the fairness to the
holders of CELCORE Capital Stock, from a financial point of view, of the
Exchange Ratio pursuant to the terms of the Merger Agreement.
 
     A COPY OF THE DLJ OPINION IS ATTACHED HERETO AS APPENDIX B. CELCORE
STOCKHOLDERS ARE URGED TO READ THE DLJ OPINION IN ITS ENTIRETY FOR ASSUMPTIONS
MADE, PROCEDURES FOLLOWED, OTHER MATTERS CONSIDERED AND LIMITS OF THE REVIEW BY
DLJ.
 
     DLJ delivered to CELCORE's Board of Directors on October 16, 1997, its oral
opinion to the effect that the Exchange Ratio was fair to the holders of CELCORE
Capital Stock from a financial point of view, based on and subject to the
assumptions, factors and limitations set forth in its written opinion and as
described below. This opinion was subsequently confirmed in a written opinion
("the DLJ Opinion") dated October 29, 1997 to CELCORE's Board of Directors to
the effect that, as of October 29, 1997 and based upon and subject to, the
assumptions, limitations and qualifications set forth in such opinion, the
Exchange Ratio was fair to the holders of CELCORE Capital Stock from a financial
point of view.
 
     The DLJ Opinion was prepared for CELCORE's Board of Directors and is
directed only to the fairness of the Exchange Ratio to holders of CELCORE
Capital Stock from a financial point of view and does not constitute a
recommendation to any CELCORE stockholder as to how such stockholder should vote
at the Special Meeting.
 
     The DLJ Opinion does not constitute an opinion as to the price at which DSC
Common Stock will actually trade at any time. The Exchange Ratio was determined
in arm's-length negotiations between CELCORE and DSC, in which negotiations DLJ
advised CELCORE. No restrictions or limitations were imposed by CELCORE upon DLJ
with respect to the investigations made or the procedures followed by DLJ in
rendering its opinion.
 
     In arriving at its opinion, DLJ reviewed the Merger Agreement. DLJ also has
reviewed financial and other information that was furnished to it by CELCORE,
including information provided during discussions with CELCORE's management.
Included in the information provided during discussions with management were
certain financial projections of CELCORE for the period beginning July 1, 1997
and ending December 31, 1998, prepared by the management of CELCORE. In
addition, DLJ compared certain financial data of CELCORE with various other
companies whose securities are traded in public markets, reviewed prices and
premiums paid in certain other business combinations and conducted such other
financial studies, analyses and investigations as DLJ deemed appropriate for
purposes of its opinion.
 
     In rendering its opinion, DLJ relied upon and assumed the accuracy and
completeness of all of the financial and other information that was available to
it that was provided to it by CELCORE or its representatives, or that was
otherwise reviewed. With respect to the financial projections supplied to it,
DLJ
 
                                       29
<PAGE>   36
 
assumed that they have been reasonably prepared on the basis reflecting the best
currently available estimates and judgments of the management of CELCORE as to
the future operating and financial performance of CELCORE. DLJ did not assume
any responsibility for making an independent evaluation of CELCORE's assets or
liabilities or for making any independent verification of any of the information
that it reviewed.
 
     The DLJ Opinion is necessarily based on economic, market, financial and
other conditions as they existed on, and on the information made available to it
as of, the date of its opinion. It should be understood that, although
subsequent developments may affect its opinion, DLJ does not have any obligation
to update, revise or reaffirm the DLJ Opinion.
 
     Pursuant to the terms of an engagement letter dated June 16, 1997, CELCORE
agreed to pay DLJ a fee of approximately $1.8 million (including $300,000 upon
notification that DLJ was prepared to deliver the DLJ Opinion). DLJ's fee was
based upon a calculation of 1.1% of the enterprise value of the price paid for
CELCORE by DSC. CELCORE also agreed to reimburse DLJ promptly for all
out-of-pocket expenses (including the reasonable fees and out-of-pocket expenses
of counsel) incurred by DLJ in connection with its engagement, and to indemnify
DLJ and certain related persons against certain liabilities in connection with
its engagement, including liabilities under the federal securities laws. The
terms of the fee arrangement with DLJ, which DLJ and CELCORE believe are
customary in transactions of this nature, were negotiated at arm's length
between CELCORE and DLJ and CELCORE's Board of Directors was aware of such
arrangement, including the fact that a significant portion of the aggregate fee
payable to DLJ is contingent upon consummation of the Merger.
 
     The Board of Directors of CELCORE selected DLJ to render a fairness opinion
because DLJ is an internationally recognized investment banking firm with
substantial expertise in transactions similar to the Merger and because it is
familiar with CELCORE and its business. DLJ, as part of its investment banking
services, is regularly engaged in the valuation of businesses and securities in
connection with the mergers, acquisitions, underwritings, sales and
distributions of listed and unlisted securities, private placements and
valuations for corporate and other purposes.
 
DSC'S REASONS FOR THE MERGER
 
     The Board of Directors of DSC unanimously approved the Merger Agreement on
October 27, 1997. The Board of Directors of DSC believes the consummation of the
Merger is in DSC's best interest. In arriving at its decision, DSC's management
reviewed with the Board of Directors a number of factors that support the
consideration to be paid by DSC.
 
     Among the factors the Board of Directors of DSC considered were:
 
     (i)    information concerning DSC's and CELCORE's respective businesses,
            historical financial performance, operations and products including
            possible future product releases;
 
     (ii)   historic and anticipated growth rates for global wireless and mobile
            communications markets;
 
     (iii)  the prospects for CELCORE's future GSM products;
 
     (iv)   DSC's strategy to capitalize on its existing international presence
            and to expand its international revenue base through the sale of
            CELCORE's products;
 
     (v)    DSC's opportunity to offer service providers a more comprehensive
            product offering by combining CELCORE's products with other DSC
            products;
 
     (vi)   a comparison of the financial terms of comparable merger and
            acquisition transactions;
 
     (vii)  the compatibility of the management and businesses of DSC and
            CELCORE; and
 
     (viii) reports from DSC's management and legal advisors on specific terms
            of the relevant agreements.
 
                                       30
<PAGE>   37
 
EFFECTIVE TIME
 
     If the Merger Agreement is approved and adopted by the requisite vote of
CELCORE's stockholders and the other conditions to the Merger are satisfied or
waived (if permissible), the Effective Time will occur at the time a Certificate
of Merger is filed with the Secretary of State of the State of Delaware or at
such later time as the parties to the Merger Agreement agree to in writing and
specify in such Certificate of Merger. The Merger Agreement provides that DSC
and CELCORE will cause the Effective Time to occur as promptly as practicable,
but in no event later than the first business day (unless such other date is
agreed to in writing by the parties to the Merger Agreement) following the
satisfaction or, if permissible, waiver of all the conditions set forth in the
Merger Agreement. The Merger Agreement may be terminated prior to the Effective
Time by either DSC or CELCORE in certain circumstances, whether before or after
approval and adoption of the Merger Agreement by the stockholders of CELCORE.
See "Certain Provisions of the Merger Agreement -- Termination."
 
TERMS OF THE MERGER
 
     If all required stockholder approvals are obtained and all other conditions
to the Merger are satisfied or waived, if permissible, then at the Effective
Time Merger Subsidiary will be merged with and into CELCORE, which will be the
Surviving Corporation with the name DSC/Celcore, Inc., and the Certificate of
Incorporation and Bylaws of CELCORE will be amended automatically to conform
with those of Merger Subsidiary. In the Merger, each share of CELCORE Capital
Stock outstanding immediately prior to the Effective Time (other than Dissenting
Shares) will be converted into a fraction of a share of DSC Common Stock, based
on the Exchange Ratio. The Exchange Ratio will depend on the Average Trading
Price and will be equal to eight divided by the Average Trading Price; provided
that in the event the Average Trading Price is $25.00 or less then the Exchange
Ratio will be .32. CELCORE's stockholders will also receive the rights (if any)
attaching to such stock pursuant to the DSC Rights Agreement. In addition, each
CELCORE Option outstanding under the 1995 Plan and the 1996 Plan, except for
certain BFG Options, will be assumed by DSC and will be converted into an option
to acquire DSC Common Stock, based on the Exchange Ratio. Any resulting
fractional share interest will be paid in cash. In connection with the Merger,
an aggregate amount equal to 5.333% of the shares of DSC Common Stock otherwise
issuable to holders of CELCORE Capital Stock by virtue of the Merger will be
placed into escrow and held as security for losses incurred by DSC in the event
of certain breaches by CELCORE of the covenants, representations or warranties
contained in the Merger Agreement and for the costs and expenses incurred by the
Representative in performing his obligations under the escrow provisions of the
Merger Agreement. The Merger is structured as a tax-free reorganization to the
extent CELCORE's stockholders receive shares of DSC Common Stock. Depending upon
uncertain factual developments, it is possible that the Merger might not be
treated as a reorganization within the meaning of Section 368(a) of the Code, as
a result of which each holder of shares of CELCORE Capital Stock would recognize
gain in the amount of the difference between the fair market value of the shares
of DSC Common Stock and/or cash in lieu of fractional shares, and such holder's
tax basis in CELCORE Capital Stock exchanged therefor. See "The
Merger -- Certain United States Federal Income Tax Consequences."
 
CERTAIN UNITED STATES FEDERAL INCOME TAX CONSEQUENCES
 
     The following discussion is a summary of the material United States federal
income tax consequences of the Merger and is not intended to be a complete
discussion of all potential tax effects that might be relevant to the Merger.
Such discussion deals only with a citizen or resident of the United States or a
domestic corporation (a "U.S. Holder"). This summary assumes that CELCORE
Capital Stock has been held as a capital asset. It may not be applicable to
certain classes of taxpayers, including, without limitation, insurance
companies, tax-exempt organizations, financial institutions, securities dealers,
broker-dealers, foreign persons, persons who hold CELCORE Capital Stock as part
of a conversion transaction, and persons who acquired CELCORE Capital Stock
pursuant to the exercise of employee stock options or rights or otherwise as
compensation. Moreover, the state, local, foreign, and estate tax consequences
to CELCORE stockholders of the Merger are not discussed.
 
                                       31
<PAGE>   38
 
     This summary is based on laws, regulations, rulings, practice, and judicial
decisions in effect at the date of this Prospectus/Proxy Statement, on the
opinion of Baker & McKenzie, counsel to DSC, and on the opinion of Powell,
Goldstein, Frazer & Murphy LLP, counsel to CELCORE. However, legislative,
judicial, or administrative changes or interpretations may be forthcoming that
could alter or modify the statements and conclusions set forth herein. Any such
changes or interpretations may or may not be retroactive and could affect the
tax consequences described herein to stockholders.
 
     It is intended that the Merger qualify as a reorganization within the
meaning of Section 368(a) of the Code and that, for federal income tax purposes,
no gain or loss will be recognized by DSC or CELCORE as a result of the Merger.
 
     DSC and CELCORE have received the "Tax Opinions" each dated as of the date
of this Prospectus/Proxy Statement, that the Merger should be treated as a
reorganization within the meaning of Section 368(a) of the Code and that CELCORE
and DSC will each be a party to the reorganization pursuant to Section 368(b) of
the Code. Such an opinion is not binding on the Internal Revenue Service ("IRS")
or the courts, and, therefore, the delivery of the Tax Opinions cannot assure
that the IRS or the courts will treat the Merger as a reorganization within the
meaning of Section 368(a) of the Code. The Tax Opinions are based, among other
things, on assumptions relating to certain facts and circumstances of, and the
intentions of the parties to, the Merger, which assumptions have been made with
the consent of CELCORE and DSC.
 
     The Tax Opinions rely, in part, on certain assumptions, representations and
warranties relating to the satisfaction of the "continuity of interest"
requirement for reorganization treatment. To satisfy the continuity of interest
requirement, CELCORE stockholders must not, pursuant to a plan or intent
existing at or prior to the Merger, dispose of or transfer so much of either (i)
their CELCORE Capital Stock in anticipation of the Merger or (ii) the DSC Common
Stock to be received in the Merger (collectively "Planned Dispositions"), such
that the CELCORE stockholders, as a group, would no longer have a meaningful
continuing equity interest in DSC after the Merger. Planned Dispositions
include, among other things, disposition of shares pursuant to the exercise of
appraisal rights. Although it is unsettled as to what constitutes sufficient
continuity of interest, 50% continuity should satisfy the requirement. CELCORE
has represented that CELCORE knows of no plan or intention on the part of the
CELCORE stockholders to engage in Planned Dispositions that would reduce the
holdings of DSC Common Stock by all CELCORE stockholders to less than 50% of the
total value of CELCORE Capital Stock as of immediately prior to the Merger. The
Tax Opinions are based on the assumption that there is no plan or intention on
the part of the CELCORE stockholders to dispose of a number of shares of DSC
Common Stock to be issued to such stockholders in the Merger, sufficient to
reduce the CELCORE stockholders ownership of the DSC Common Stock to a number of
shares having an aggregate fair market value (determined as of the Effective
Time) of less than 50% of the aggregate fair market value (determined
immediately prior to the Effective Time) of all outstanding shares of CELCORE
Capital Stock.
 
     In the case of reorganizations that are subsidiary mergers, such as the
Merger, the surviving corporation must acquire "substantially all" the assets of
the acquired corporation. For advance letter ruling purposes the IRS will rule
that the "substantially all" requirement will be met if, at the time of the
merger, the surviving corporation holds at least 90% of the fair market value of
the net assets and 70% of the fair market value of the gross assets of the
acquired corporation (taking into account certain pre-merger redemptions and
distributions and amounts used by the acquired corporation to pay reorganization
expenses and dissenting stockholders). Pursuant to the Merger Agreement, CELCORE
has represented that the IRS ruling standard set forth above will be met.
Accordingly, assuming the accuracy of this representation, the "substantially
all" requirement will be met.
 
     The Tax Opinions provide, assuming the Merger is a reorganization within
the meaning of Section 368(a) of the Code, that (i) a U.S. Holder of CELCORE
Capital Stock who, pursuant to the Merger, exchanges such U.S. Holder's CELCORE
Capital Stock solely for DSC Common Stock will not recognize gain or loss on the
exchange, (ii) the holding period of DSC Common Stock received by each U.S.
Holder of CELCORE Capital Stock in the Merger will include the holding period of
CELCORE Capital Stock surrendered therefor, (iii) the tax basis of such DSC
Common Stock will equal the U.S. Holder's tax basis in
 
                                       32
<PAGE>   39
 
CELCORE Capital Stock exchanged in the Merger less the tax basis allocated to
fractional share interests, (iv) that a U.S. Holder of CELCORE Capital Stock
who, pursuant to the Merger, receives cash in lieu of a fractional share of DSC
Common Stock will recognize capital gain or loss equal to the difference between
the amount of cash received and the U.S. Holder's adjusted tax basis in the
fractional share of DSC Common Stock, (v) no gain or loss will be recognized by
DSC, Merger Subsidiary or CELCORE as a result of the Merger and (vi) the tax
basis of the shares of CELCORE Capital Stock received by DSC will, at the
election of DSC, equal either: (x) DSC's tax basis in its Merger Subsidiary
stock immediately prior to the Merger plus CELCORE's net tax basis of CELCORE's
assets and liabilities immediately prior to the Merger, or (y) the tax basis of
CELCORE Capital Stock in the hands of CELCORE's stockholders immediately prior
to the Merger. The gain or loss recognized by a U.S. Holder of CELCORE Capital
Stock who, pursuant to the Merger, receives cash in lieu of a fractional share
of DSC Common Stock, will be capital gain or loss, provided that such share of
CELCORE Capital Stock was held as a capital asset at the Effective Time. Capital
gains will be based at a lower rate if such share of CELCORE Capital Stock has
been held for more than one year. The capital gain rate may be further reduced
if the U.S. Holder's holding period in such share of CELCORE Capital Stock is
more than eighteen months.
 
     The Merger is not contingent on the updating of the Tax Opinions as of the
Effective Time. Further, the accuracy of the assumptions counsel was directed to
make in rendering the Tax Opinions will not be known until after the Effective
Time. In the event that the 50% continuity representation described above is not
satisfied, it is possible that the Merger would not be treated as a
reorganization within the meaning of Section 368(a) of the Code. Additionally,
if the "substantially all" representations or assumption proves to be inaccurate
because, for example, CELCORE's payments to dissenters constitute more than 10%
of the fair market value of the net assets of CELCORE, it is possible that the
"substantially all" requirement will not be satisfied, and if such requirement
is not satisfied, the Merger would not be treated as a reorganization. The Tax
Opinions do not address the tax consequences to the CELCORE stockholders in the
event the Merger is not treated as a reorganization within the meaning of
Section 368(a) of the Code. Generally in such event, each stockholder of CELCORE
would recognize gain in the amount of the difference between (i) the fair market
value of the DSC Common Stock and the amount of cash received in lieu of a
fractional share of DSC Common Stock and (ii) such holder's adjusted tax basis
in CELCORE Capital Stock surrendered therefor. Any such recognized gain
generally would be characterized as capital gain or loss. If the Merger is not
considered a reorganization, the holding period of DSC Common Stock received by
each U.S. Holder of CELCORE Capital Stock in the Merger would not include the
holding period of CELCORE Capital Stock surrendered therefor and the aggregate
adjusted tax basis of such DSC Common Stock would equal the fair market value of
DSC Common Stock received.
 
     THE FOREGOING DISCUSSION IS INTENDED ONLY AS A GENERAL SUMMARY OF CERTAIN
FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER AND DOES NOT PURPORT TO BE A
COMPLETE ANALYSIS OR LISTING OF ALL POTENTIAL TAX EFFECTS RELEVANT TO A DECISION
WHETHER TO VOTE IN FAVOR OF APPROVAL AND ADOPTION OF THE MERGER AGREEMENT AND
THE MERGER. THE DISCUSSION DOES NOT ADDRESS THE TAX CONSEQUENCES THAT MAY BE
RELEVANT TO A PARTICULAR CELCORE STOCKHOLDER SUBJECT TO SPECIAL TREATMENT UNDER
CERTAIN FEDERAL INCOME TAX LAWS, SUCH AS DEALERS IN SECURITIES, BANKS, INSURANCE
COMPANIES, TAX-EXEMPT ORGANIZATIONS, NON-UNITED STATES PERSONS AND STOCKHOLDERS
WHO ACQUIRED THEIR SHARES OF CELCORE CAPITAL STOCK PURSUANT TO THE EXERCISE OF
CELCORE OPTIONS OR OTHERWISE AS COMPENSATION, NOR DOES IT ADDRESS ANY
CONSEQUENCES ARISING UNDER THE LAWS OF ANY STATE, LOCALITY OR FOREIGN
JURISDICTION. THE DISCUSSION IS BASED ON THE CODE, TREASURY REGULATIONS
THEREUNDER AND ADMINISTRATIVE RULINGS AND COURT DECISIONS AS OF THE DATE HEREOF.
ALL OF THE FOREGOING ARE SUBJECT TO CHANGE AND ANY SUCH CHANGE COULD AFFECT THE
CONTINUING VALIDITY OF THE DISCUSSION. CELCORE STOCKHOLDERS ARE URGED TO CONSULT
THEIR OWN TAX ADVISORS CONCERNING THE FEDERAL, STATE, LOCAL AND FOREIGN TAX
CONSEQUENCES OF THE MERGER TO THEM.
 
                                       33
<PAGE>   40
 
REGULATORY APPROVALS
 
     DSC and CELCORE are aware of no governmental regulatory approvals still
required for consummation of the Merger, other than compliance with notification
requirements of environmental agencies, with federal securities laws, and with
state securities or "Blue Sky" laws. The Merger was subject to the pre-merger
notification provisions of the HSR Act. Filings were made under the HSR Act by
DSC and CELCORE with the Federal Trade Commission and the Department of Justice
Antitrust Division.
 
     Under the Merger Agreement, CELCORE, DSC and Merger Subsidiary have agreed
to use their best efforts to (i) take, or cause to be taken, all appropriate
action, and do, or cause to be done, all things necessary, proper or advisable
under applicable law or required to be taken by any governmental authority or
otherwise to consummate and make effective the transactions contemplated by the
Merger Agreement as promptly as practicable, (ii) obtain from any governmental
authorities any consents or other governmental authorizations required to be
obtained or made by DSC or CELCORE or any of their subsidiaries in connection
with the authorization, execution and delivery of the Merger Agreement and the
consummation of the transactions contemplated thereunder, including without
limitation, the Merger, and (iii) as promptly as practicable, make all necessary
filings, and thereafter make any other required submissions, with respect to the
Merger Agreement and the Merger required under (a) the Securities Act and the
Exchange Act, and any other applicable federal or state securities laws, (b) the
rules and regulations of the NASDAQ National Market, (c) the DGCL, (d) the HSR
Act and any related governmental request thereunder, and (e) any other
applicable law. DSC and CELCORE have agreed to cooperate with each other in
connection with the making of all such filings, including providing copies of
all such documents to the non-filing party and its advisors prior to filing and,
if requested, accepting all reasonable additions, deletions or changes suggested
in connection therewith. CELCORE and DSC have also agreed to use reasonable best
efforts to furnish to each other all information required for any application or
other filing to be made pursuant to the rules and regulations of any applicable
law (including all information required to be included in this Prospectus/Proxy
Statement and the Registration Statement) in connection with the transactions
contemplated by the Merger Agreement.
 
ACCOUNTING TREATMENT
 
     It is intended that DSC will account for the Merger as a purchase
transaction under GAAP. See "Unaudited Pro Forma Combined Financial Statements."
 
NASDAQ NATIONAL MARKET LISTING
 
     An application has been filed to have the shares of DSC Common Stock to be
issued in connection with the Merger approved for quotation on the NASDAQ
National Market. Evidence from the NASDAQ National Market that the shares of DSC
Common Stock to be issued in connection with the Merger have been approved for
quotation on the NASDAQ National Market immediately following the Effective Time
is a condition to the consummation of the Merger. See "Certain Provisions of the
Merger Agreement -- Conditions to the Consummation of the Merger."
 
INTERESTS OF CERTAIN PERSONS; POSSIBLE CONFLICTS OF INTEREST
 
     Interests of Certain Persons in the Merger. In considering the
recommendation of the Board of Directors of CELCORE with respect to the Merger
Agreement and the transactions contemplated thereby, stockholders should be
aware that certain members of the management of CELCORE and of its Board of
Directors have certain interests in the Merger that are in addition to the
interests of the stockholders of CELCORE generally.
 
     Voting. As of October 30, 1997, directors and executive officers of CELCORE
and their affiliates may be deemed to be beneficial owners of approximately
66.85% of the outstanding shares of CELCORE Common Stock and 78.70% of the
outstanding shares of Series A Preferred Stock, 0.83% of the outstanding shares
of Series B Preferred Stock and 0.27% of the outstanding shares of Series C
Preferred Stock. See "Principal Stockholders of CELCORE." The directors and
executive officers of CELCORE and certain of their affiliates are obligated to
vote or direct the vote of all of the outstanding shares of CELCORE Capital
Stock over which they have voting control in favor of the approval and adoption
of the Merger Agreement, the payments under
 
                                       34
<PAGE>   41
 
the Employment Agreements, and to the extent they are holders of CELCORE
Preferred Stock, the waiver of Liquidation Rights under CELCORE's Certificate of
Incorporation and Certificates of Designations. Additionally, such directors and
executive officers of CELCORE and certain of their affiliates have agreed not to
take any action or actions to perfect any appraisal rights such Principal
Stockholder may have as a result of the Merger under Section 262 of the DGCL.
See "Voting Agreements -- Voting and Proxy" and "-- Waiver of Appraisal Rights
and Preferred Stock Liquidation Rights."
 
     Covenant Not-to-Compete. Concurrently with the execution of the Merger
Agreement and as a condition of the willingness of DSC to enter into the Merger
Agreement, Robert P. Goodman, Chairman of the Board and Chief Executive Officer
of CELCORE, has executed a covenant not-to-compete under the terms of his Voting
Agreement. Mr. Goodman has agreed that until after the fifth anniversary of the
Closing Date, he will not be involved in a Prohibited Business within certain
geographic areas. Mr. Goodman has also agreed that until after the first
anniversary of the Closing Date, he will not make known to persons or
corporations involved in a Prohibited Business the customers of CELCORE; contact
or take away or attempt to contact or take away CELCORE customers for persons or
corporations involved in a Prohibited Business; or recruit or hire or attempt to
recruit or hire CELCORE employees, consultants or independent contractors. Mr.
Goodman has agreed that a breach or violation of the covenant not-to-compete
will entitle DSC to an injunction restraining any further or continued breach or
violation of the covenant not-to-compete. See "Voting Agreements -- Covenant
Not-to-Compete."
 
     Payments Under the Employment Agreements. In connection with the
consummation of the Merger, the stockholders of CELCORE will be asked to approve
all payments to each of Thomas R. Berger, James M. Foley and Joseph Gonzalez
under the terms of the Employment Agreements. DSC's obligation to enter into the
Employment Agreements is contingent upon the approval of such payments to
Messrs. Berger, Foley and Gonzalez under the Employment Agreements by the
affirmative vote of holders of more than 75% of the outstanding shares of
CELCORE Capital Stock (excluding shares held by Messrs. Berger, Foley and
Gonzalez and certain of their respective related parties), voting together as a
single class, represented and entitled to vote at the Special Meeting or any
adjournment thereof. The approval of the payments under the Employment
Agreements is not a condition to the consummation of the Merger. See "Proposal
to Approve the Payments Under the Employment Agreements." Messrs. Berger, Foley
and Gonzalez are executive officers of CELCORE. Each of the Employment
Agreements will be for a term of two years, and will provide annual compensation
and bonuses as follows: Mr. Berger, $226,550 and $350,000; Mr. Foley, $151,225
and $150,000; and Mr. Gonzalez, $148,925 and $150,000. The bonuses under the
Employment Agreements will be payable in two installments, the first of which is
due on the Closing Date and the second of which is due on the second anniversary
of the Closing Date (the second such installment is referred to as the
"Retention Award"), as follows: Mr. Berger, $100,000 and $250,000; Mr. Foley,
$50,000 and $100,000; and Mr. Gonzalez, $50,000 and $100,000. In the event
Messrs. Berger's, Foley's or Gonzalez's employment is terminated by DSC without
Cause or by such person for Good Reason (as such terms are defined in the
Employment Agreements), (i) DSC will pay a lump sum amount in cash equal to a
pro-rata amount of the Retention Award, based on the number of days elapsed from
the Closing Date to the date of termination, (ii) DSC will continue to pay to
such persons base salary for a period of six months, and (iii) such person will
be entitled to six months of continued coverage under the health and welfare
benefit plans in which such person was eligible to participate immediately prior
to the date of termination on the same basis as such benefits were made
available immediately prior to the date of termination. Pursuant to the
Employment Agreements, DSC has also agreed to provide each of Messrs. Berger,
Foley and Gonzalez with options under DSC's 1993 Employee Stock Option and
Securities Award Plan to purchase up to the following number of shares of DSC
Common Stock: Mr. Berger, 40,000 shares; Mr. Foley, 20,000 shares; and Mr.
Gonzalez, 20,000 shares. The Employment Agreements further provide that Messrs.
Berger, Foley and Gonzalez will be eligible for performance-based bonus payments
under DSC's Annual Incentive Compensation Plan.
 
     Proprietary Rights Agreements. In connection with the execution of the
Employment Agreements, certain of the officers and other employees of CELCORE,
including Messrs. Berger, Foley and Gonzalez, will enter into proprietary rights
agreements with DSC, which will contain a covenant not-to-compete. The covenant
not-to-compete restricts each person, for so long as such person is employed by
DSC and until the
 
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<PAGE>   42
 
second anniversary of the termination of his employment, from directly or
indirectly, either as an employer, consultant, agent, principal, partner, or in
any other capacity, engaging or participating in any business that is in
competition in any manner whatsoever with the business of CELCORE, which
involves the use of technology reasonably similar to the Intellectual Property
Assets (as defined in the Merger Agreement) of CELCORE, or which involves any
technologies which are acquired by CELCORE, prior to the date of termination of
employment or which are derived from the Intellectual Property Assets as of the
date of termination of employment, within the United States or any country in
which CELCORE or DSC or any of their respective subsidiaries is conducting or
reasonably expects to conduct or expand its business. Additionally, the covenant
not-to-compete provides that so long as such person is employed by DSC and until
the second anniversary of the termination of his employment such person will not
perform work on technical development projects or programs that are similar to
the projects or programs that such person has worked on for DSC or CELCORE
during the past five years.
 
     CELCORE Options. Certain officers and directors of CELCORE hold CELCORE
Options pursuant to the 1995 Plan and the 1996 Plan. Under the Merger Agreement,
these CELCORE Options will be assumed by DSC and will be converted into options
to acquire DSC Common Stock based on the Exchange Ratio following the Effective
Time. DSC has agreed to assume the obligations of CELCORE under the 1995 Plan
and the 1996 Plan. See "Certain Provisions of the Merger Agreement -- Effect of
the Merger on CELCORE Options." CELCORE's option agreements (the "Original
Option Agreements") with Messrs. Berger, Foley and Gonzalez under the 1995 Plan
to acquire 500,000, 105,000 and 150,000 shares of CELCORE Common Stock,
respectively, contain provisions providing for the full and immediate
exercisability of the BFG Options evidenced by the Original Option Agreements as
a result of a Change in Control (as defined in the Original Option Agreements).
Immediately prior to the execution of the Merger Agreement, 162,500, 22,500 and
37,500 shares of the CELCORE Common Stock were vested. Following the execution
of the Merger Agreement, the Original Option Agreements with Messrs. Berger,
Foley and Gonzalez were amended (as amended, the "Amended Option Agreements").
Under the Amended Option Agreements, each of Messrs. Berger, Foley and Gonzalez
have agreed that the consummation of the Merger would not give rise to a Change
in Control. Notwithstanding the foregoing, the Amended Option Agreements and the
Employment Agreements provide that a portion of the unvested amount of the BFG
Options will become vested and the remainder of such unvested portion will be
canceled. These agreements provide that 20% of the unvested amount of the BFG
Options under the Original Option Agreements will become immediately
exercisable, which will represent options to purchase the following shares of
CELCORE Common Stock: Mr. Berger, 67,500 shares; Mr. Foley, 16,500 shares; and
Mr. Gonzalez, 22,500 shares. Consequently, as of the Effective Time, Messrs.
Berger, Foley and Gonzalez will hold vested BFG Options to purchase the
following shares of CELCORE Common Stock: Mr. Berger, 230,000 shares; Mr. Foley,
39,000 shares; and Mr. Gonzalez, 60,000 shares. Additionally, pursuant to the
Employment Agreements, Messrs. Berger, Foley and Gonzalez will be deemed to have
been granted at the Effective Time an option (the "Retainage Option") to
purchase that number of shares of DSC Common Stock equal to the product of the
shares of CELCORE Common Stock covered by the Canceled Options multiplied by the
Exchange Ratio. The Retainage Option will, except as provided below, be subject
to the same terms and conditions as the Amended Option Agreement. The Retainage
Option will be granted at an exercise price equal to the reported last sale
price of DSC Common Stock on the NASDAQ National Market on the date of grant. On
each of the first and second anniversary date of the date of grant of the
Retainage Option, one-half of the shares of DSC Common Stock covered by the
Retainage Option will be exercisable. All other provisions of the Retainage
Option will be subject to the terms and conditions of the 1995 Plan. The
Retainage Option will be assumed by DSC and will be converted into options to
acquire DSC Common Stock based on the Exchange Ratio following the Effective
Time. Pursuant to the Employment Agreements, the remaining balance of the
unvested amount of such BFG Options outstanding immediately prior to the
Effective Time will be forfeited, terminated and canceled (the "Canceled
Options"). Under the Amended Option Agreements, if Messrs. Berger's, Foley's or
Gonzalez's employment is terminated by such person as a result of a Constructive
Discharge (as defined in the Amended Option Agreement), all of the shares of DSC
Common Stock subject to the options evidenced by the Amended Option Agreement
will become immediately exercisable on the date such person's employment is
terminated, and such options will terminate on the earlier of (i) one year after
the date such person's
 
                                       36
<PAGE>   43
 
employment by DSC and its subsidiaries is terminated, or (ii) the date on which
such option expires by its terms. Under the Employment Agreements, Messrs.
Berger, Foley and Gonzalez have agreed that the terms of the Merger Agreement
and the Employment Agreement will not give rise to an event of Constructive
Discharge.
 
     Promissory Notes. In consideration of the termination of the Canceled
Options, on the date of the Effective Time, DSC will execute and deliver to each
of Messrs. Berger, Foley and Gonzalez a promissory note (collectively, the
"Notes"). The principal balance of each Note shall be determined by (1) in
respect of each of the Canceled Options, calculating the product of (i) the
difference of (A) the Average Trading Price, minus (B) the quotient of the
exercise price of the Canceled Options of such individual, divided by the
Exchange Ratio, times (ii) the number of shares covered by the Canceled Options,
times (iii) the Exchange Ratio, and (2) aggregating the total of all amounts
computed for each of the Canceled Options in clause (1) above. The principal
balance of each Note will be payable in two equal installments on the first and
second anniversary of the Effective Time, each of which will be an amount equal
to one-half of the aggregate original principal balance of such Note. Payments
of the principal amounts will be made by delivery of that number of whole shares
of DSC Common Stock having an aggregate value (based on the reported last sale
price of a share of DSC Common Stock on the NASDAQ National Market as reported
on the date immediately preceding the date such principal installment is due)
equal to the principal installment due. No fractional share of DSC Common Stock
will be delivered thereunder, and, in lieu thereof, cash payments will be made
in lieu of any fractional shares. The principal balance of each Note will bear
no interest. The entire unpaid principal balance of the Note payable to Messrs.
Berger, Foley and Gonzalez, as the case may be, will immediately become due and
payable in the event such individual's employment with DSC and its subsidiaries
is terminated (i) for any reason other than "for cause," (ii) by reason of a
Constructive Discharge (as defined in the Amended Option Agreement), or (iii) by
reason of his death or disability. Notwithstanding the foregoing, if (i) such
individual's employment with DSC, or its subsidiaries, is terminated "for cause"
or (ii) such individual ceases to be employed by DSC and its subsidiaries
because he voluntarily terminates such employment (other than by reason of a
Constructive Discharge), then in each such case such individual will be deemed
to have forever released and fully discharged DSC of any obligation whatsoever
to pay such individual any remaining principal balance due under his Note as of
the date of termination of such individual's employment.
 
     DSC Special Celcore Incentive Plan. In connection with the Merger, DSC
adopted the DSC Special Celcore Incentive Plan ("Incentive Plan"), pursuant to
which certain key employees of CELCORE, including Messrs. Berger, Foley and
Gonzalez, will be granted as of the Effective Time options ("Incentive Options")
to purchase shares of DSC Common Stock and, subject to the attainment of certain
target revenues, awarded certain cash payments ("Cash Payments").
 
RESTRICTIONS ON RESALES BY AFFILIATES
 
     DSC has registered the shares of DSC Common Stock and related Preferred
Stock Purchase Rights that the holders of CELCORE Capital Stock will be entitled
to receive upon consummation of the Merger under the Securities Act. Following
the Effective Time, CELCORE's stockholders who are not deemed to be "affiliates"
of CELCORE may freely sell the shares of DSC Common Stock they receive in the
Merger. Stockholders of CELCORE who are deemed to be "affiliates" of CELCORE may
resell the shares of DSC Common Stock received in the Merger (i) in transactions
in compliance with Rule 145 under the Securities Act, (ii) pursuant to an
effective registration statement under the Securities Act, or (iii) pursuant to
any other exemption from registration which may be available to such
stockholder. Such stockholders may not use this Prospectus/Proxy Statement to
effect resales of the shares of DSC Common Stock they receive.
 
     Rule 145, as currently in effect, imposes restrictions on the manner in
which such affiliates may make resales and also on the volume of resales that
such affiliates, and others with whom they may act in concert, may make in any
three-month period. The term "affiliates" is defined in the Securities Act to
include any person who, directly or indirectly, controls, is controlled by, or
is under common control with, CELCORE at the time the Merger is submitted to a
vote of the stockholders of CELCORE. DSC has been advised by CELCORE that Robert
P. Goodman, Thomas R. Berger, Joseph J. Gonzalez and Jay M. Rosen (each a
 
                                       37
<PAGE>   44
 
CELCORE executive officer), Robert M. Flanagan, G. Felda Hardymon and Robert E.
LaBlanc (each a director of CELCORE), and UCOM International Company Limited (a
Principal Stockholder) may be deemed "affiliates" of CELCORE for purposes of the
Securities Act. Pursuant to the Merger Agreement, CELCORE has agreed to use its
best efforts to cause (i) each of the officers and directors of CELCORE to
deliver an affiliates' agreement to DSC at least 30 days prior to the Closing
Date and (ii) any person who may be deemed to be an "affiliate" of CELCORE (for
purposes of the Securities Act) to deliver an affiliates' agreement to DSC on or
prior to the Effective Time. The affiliates' agreement must be in substantially
the form attached as Exhibit B to the Merger Agreement.
 
     Pursuant to the Voting Agreements, DSC has agreed to use all commercially
reasonable efforts to effect the registration under the Securities Act of the
transfer of certain shares of DSC Common Stock to be received by the Principal
Stockholders in exchange for the Principal Stockholders Shares and the resale of
shares of DSC Common Stock by the Principal Stockholders, subject to certain
restrictions. See "Voting Agreements -- Registration of Merger Shares."
 
MANAGEMENT
 
     Pursuant to the Merger Agreement, upon the consummation of the Merger, the
officers and directors of Merger Subsidiary immediately prior to the Effective
Time will be the officers and directors of the Surviving Corporation, in each
case until their respective successors are duly elected or appointed and
qualified, or as otherwise provided in the Certificate of Incorporation and
Bylaws of the Surviving Corporation. The terms and responsibilities of each
officer and director of the Surviving Corporation will be as set forth in the
Certificate of Incorporation and Bylaws of the Surviving Corporation.
 
LOAN BY DSC TO CELCORE
 
     In the fourth quarter of 1997, CELCORE and a subsidiary of DSC entered into
a revolving credit agreement under which CELCORE can borrow up to $10,000,000
for working capital purposes. At October 31, 1997, $4,400,000 of borrowings were
outstanding under the revolving credit agreement. Borrowings are unsecured, bear
interest at 11.5% and mature on January 15, 1998.
 
                   CERTAIN PROVISIONS OF THE MERGER AGREEMENT
 
     The following is a summary of the material provisions of the Merger
Agreement not summarized elsewhere in this Prospectus/Proxy Statement. Such
summary is qualified in its entirety by reference to the Merger Agreement.
Stockholders of CELCORE are urged to read the Merger Agreement in its entirety
for a more complete description of the Merger. The Merger Agreement is attached
as Appendix A to this Prospectus/Proxy Statement and is incorporated herein by
reference.
 
CONVERSION OF SECURITIES
 
     At the Effective Time, each share of CELCORE Capital Stock issued and
outstanding immediately prior to the Effective Time (other than Dissenting
Shares) will be converted into the right to receive that number of shares of DSC
Common Stock (including any Preferred Stock Purchase Rights or any other
purchase right issued in substitution thereof) equal to the Exchange Ratio. The
Exchange Ratio will be a fraction, the numerator of which is eight and the
denominator of which is the Average Trading Price; provided, however, in the
event the Average Trading Price is $25.00 or less then the Exchange Ratio will
be .32.
 
     From and after the Effective Time, all shares of CELCORE Capital Stock
(other than Dissenting Shares) will no longer be outstanding and will
automatically be canceled and retired and will cease to exist, and each
certificate previously representing any such shares (other than Dissenting
Shares) will thereafter represent the right to receive, subject to the escrow
provisions of the Merger Agreement, a certificate representing the shares of DSC
Common Stock into which such CELCORE Capital Stock was converted in the Merger.
Subject to the escrow provisions of the Merger Agreement, certificates
previously representing shares of CELCORE Capital Stock (other than Dissenting
Shares) will be exchanged for certificates
 
                                       38
<PAGE>   45
 
representing whole shares of DSC Common Stock issued in consideration therefor
upon the surrender of such certificates in accordance with the Merger Agreement,
without interest. A cash payment will be made in lieu of any fractional shares
of DSC Common Stock. In any event, if between the date of the Merger Agreement
and the Effective Time, the outstanding shares of DSC Common Stock, CELCORE
Common Stock or CELCORE Preferred Stock will have been changed into a different
number of shares or a different class by reason of any stock dividend,
subdivision, reclassification, recapitalization, split, combination or exchange
of shares, the Exchange Ratio will be correspondingly adjusted to reflect such
event.
 
     Any shares of CELCORE Capital Stock held in the treasury of CELCORE and any
shares of CELCORE Capital Stock owned by DSC or any direct or indirect wholly
owned subsidiary of DSC or CELCORE immediately prior to the Effective Time will
be canceled and extinguished without any conversion thereof and no payment will
be made with respect thereto. Each share of Common Stock of Merger Subsidiary
issued and outstanding immediately prior to the Effective Time will be converted
into and exchanged for one newly and validly issued, fully paid and
non-assessable share of common stock of the Surviving Corporation.
 
EXCHANGE PROCEDURES
 
     The Merger Agreement provides that DSC will deposit with a bank or trust
company designated by DSC (the "Exchange Agent"), for the benefit of the holders
of CELCORE Capital Stock, for exchange in accordance with the Merger Agreement,
through the Exchange Agent, (i) certificates evidencing the number of whole
shares of DSC Common Stock issuable in exchange for CELCORE Capital Stock and
(ii) cash in an amount sufficient to permit payment of cash payable in lieu of
fractional shares (such certificates and cash, the "Exchange Fund"). Subject to
the escrow provisions of the Merger Agreement, the Exchange Agent will deliver
the shares of DSC Common Stock and cash contemplated to be issued out of the
Exchange Fund.
 
     Promptly after the Effective Time and subject to the escrow provisions of
the Merger Agreement, DSC will instruct the Exchange Agent to mail to each
holder of record of a certificate or certificates which immediately prior to the
Effective Time represented outstanding shares of CELCORE Capital Stock (the
"Certificates") (i) a letter of transmittal (which must be in customary form and
specify that delivery will be effected, and risk of loss and title to the
Certificates will pass, only upon proper delivery of the Certificates to the
Exchange Agent) and (ii) instructions for exchanging the Certificates for
certificates representing shares of DSC Common Stock. Upon surrender of a
Certificate for cancellation to the Exchange Agent together with such duly
executed letter of transmittal and such other documents as may be required
pursuant to such instructions, the holder of such Certificate will be entitled
to receive in exchange therefor a certificate representing that number of whole
shares of DSC Common Stock which such holder has the right to receive in respect
of the shares of CELCORE Capital Stock formerly represented by such
Certificates, less a number of shares of DSC Common Stock constituting such
holder's proportionate interest of the shares held in escrow, together with cash
in lieu of fractional shares (rounded to the nearest whole share) of DSC Common
Stock and any dividends or other distributions to which such holder is entitled.
The surrendered Certificates will then be marked canceled. In addition, the
holder of such Certificate subsequently may receive shares of DSC Common Stock
pursuant to the escrow provisions of the Merger Agreement. See "Certain
Provisions of the Merger Agreement -- Escrow and Indemnification." In the event
of a transfer of ownership of shares of CELCORE Capital Stock which is not
registered in the transfer records of CELCORE, a certificate representing the
proper number of shares of DSC Common Stock may be issued to a transferee if the
Certificates representing such shares of CELCORE Capital Stock are presented to
the Exchange Agent, accompanied by all documents required to evidence and effect
such transfer and by evidence that any applicable stock transfer taxes have been
paid. Until surrendered, each Certificate will be deemed at any time after the
Effective Time to represent only the right to receive upon such surrender the
certificate representing shares of DSC Common Stock, cash in lieu of any
fractional shares of DSC Common Stock and any dividends or other distributions
to which such holder is entitled pursuant to the terms of the Merger Agreement.
 
     No dividends or other distributions declared or made after the Effective
Time with respect to DSC Common Stock with a record date after the Effective
Time will be paid to the holder of any unsurrendered Certificate with respect to
the shares of DSC Common Stock evidenced thereby until the holder of such
 
                                       39
<PAGE>   46
 
Certificate surrenders such Certificate. Subject to the effect of applicable
laws, following surrender of any such Certificate, there will be paid to the
holder of such Certificate, in addition to the shares of DSC Common Stock to
which such holder is entitled to receive in exchange for CELCORE Capital Stock,
without interest, the amount of dividends or other distributions with a record
date after the Effective Time theretofore paid with respect to the whole shares
of DSC Common Stock evidenced by such Certificate. There will be paid to the
holder of the certificates representing whole shares of DSC Common Stock issued
in exchange therefor, without interest: (i) promptly, the amount of cash payable
with respect to a fractional share of DSC Common Stock to which such holder is
entitled and the amount of dividends or other distributions with a record date
after the Effective Time theretofore paid with respect to such whole shares of
DSC Common Stock, subject to the escrow provisions of the Merger Agreement and
(ii) at the appropriate payment date, the amount of dividends or other
distributions, with a record date after the Effective Time but prior to
surrender and a payment date occurring after surrender, payable with respect to
such whole shares of DSC Common Stock, subject to the escrow provisions of the
Merger Agreement.
 
     All shares of DSC Common Stock issued or paid upon conversion of the shares
of CELCORE Capital Stock in accordance with the terms of the Merger Agreement
(including any cash paid or other distributions) will be deemed to have been
issued or paid in full satisfaction of all rights pertaining to such shares of
CELCORE Capital Stock. No certificates or scrip evidencing fractional shares of
DSC Common Stock will be issued upon the surrender for exchange of Certificates,
but in lieu thereof each CELCORE stockholder who would otherwise be entitled to
receive a fraction of a share of DSC Common Stock, after aggregating all shares
of DSC Common Stock that such holder would be entitled to receive in exchange
for that holder's shares of CELCORE Capital Stock, will receive an amount equal
to the Average Trading Price multiplied by the fraction of a share of DSC Common
Stock to which such holder would otherwise be entitled, without interest. Such
payment in lieu of fractional shares will be administered by the Exchange Agent
pursuant to the exchange procedures of the Merger Agreement.
 
     Any portion of the Exchange Fund which remains undistributed to the holders
of CELCORE Capital Stock for one year after the Effective Time will be delivered
to DSC, upon demand, and any holders of CELCORE Capital Stock who have not
theretofore complied with the exchange procedures will thereafter look only to
DSC for the shares of DSC Common Stock, any cash in lieu of fractional shares of
DSC Common Stock, and any dividends or other distributions with respect to DSC
Common Stock to which they are entitled pursuant to the distribution provisions
of the Merger Agreement. Neither DSC nor the Surviving Corporation will be
liable to any CELCORE stockholder for any shares of DSC Common Stock or cash (or
dividends or distributions with respect thereto) delivered to a public official
pursuant to any applicable abandoned property, escheat or similar law.
 
     At the Effective Time, the stock transfer books of CELCORE will be closed
and there will be no further registration of transfers of shares of CELCORE
Capital Stock thereafter on the records of CELCORE. On or after the Effective
Time, any Certificates presented to the Exchange Agent or DSC for any reason
will be converted into the shares of DSC Common Stock (subject to the escrow
provisions of the Merger Agreement), any cash in lieu of fractional shares of
DSC Common Stock and any dividends or other distributions to which they are
entitled pursuant to the terms of the Merger Agreement.
 
ESCROW AND INDEMNIFICATION
 
     The Merger Agreement provides that, at the Effective Time, an aggregate
amount equal to 5.333% of the shares (rounded to the nearest whole share) of DSC
Common Stock issuable to CELCORE's stockholders (other than holders of
Dissenting Shares) pursuant to the Merger Agreement as a result of the Merger
will be segregated and deducted therefrom and deposited into two escrow funds
with a financial institution designated by DSC and reasonably acceptable to the
Representative (the "Escrow Agent"). The first escrow fund (the "DSC Escrow
Fund") will be comprised of 5% of the shares of DSC Common Stock issuable to
CELCORE stockholders as a result of the Merger (the "DSC Escrow Amount"), plus a
proportionate share of any additional shares that may be issued to CELCORE
stockholders in respect of such shares upon any stock split, stock dividend or
recapitalization effected by DSC after the Effective Time and prior to the
Expiration Date (as defined below). The second escrow fund (the "Representative
Escrow Fund") will be comprised of .333%
 
                                       40
<PAGE>   47
 
of the shares of DSC Common Stock issuable to CELCORE stockholders as a result
of the Merger (the "Representative Escrow Amount"), plus a proportionate share
of any additional shares that may be issued to CELCORE stockholders in respect
of such shares upon any stock split, stock dividend or recapitalization effected
by DSC after the Effective Time and prior to the Expiration Date. The DSC Escrow
Fund and the Representative Escrow Fund are sometimes collectively referred to
as the "Escrow Funds." Upon the exercise of any CELCORE Option between the
Effective Time and the Expiration Date (as defined below), 5% and .333% of the
shares of DSC Common Stock issued upon such exercise will be added and deposited
to the DSC Escrow Fund and the Representative Escrow Fund, respectively, upon
such exercise. Any CELCORE Option that remains unexercised as of the termination
of the Escrow Period (as defined below) will have the number of shares of DSC
Common Stock issuable upon the exercise of such option reduced in proportion to
any reduction in the number of shares of DSC Common Stock received by holders of
the CELCORE Options assumed by DSC which are exercised prior to the Expiration
Date as a result of any distribution made to DSC pursuant to the escrow and
indemnification provisions of the Merger Agreement.
 
     The DSC Escrow Fund will be held as collateral for the indemnification
obligations of the persons who were CELCORE stockholders (other than holders of
Dissenting Shares) or holders of CELCORE Options immediately prior to the
Effective Time. The Representative Escrow Fund will be used to pay for the costs
and expenses, including reasonable attorneys' fees and expenses, and expenses of
investigation and defense ("Representative Expenses"), incurred by the
Representative in performing his obligations under the escrow provisions of the
Merger Agreement.
 
     The Escrow Funds will be held in accordance with and subject to the escrow
and indemnification provisions of the Merger Agreement and the escrow agreement
with the Escrow Agent. All of CELCORE's representations, warranties, covenants
and agreements relating to the intellectual property assets of CELCORE, whether
contained in the Merger Agreement or in any instrument delivered pursuant to the
Merger Agreement, will survive the Merger and continue until 5:00 p.m., Dallas,
Texas time, one year following the Closing Date (the "Expiration Date"). None of
CELCORE's other representations, warranties, covenants and agreements will
survive the Closing Date. Furthermore, none of DSC's representations,
warranties, covenants and agreements contained in the Merger Agreement or in any
instrument delivered pursuant to the Merger Agreement will survive the Merger.
 
     The DSC Escrow Fund will be the sole and exclusive remedy available to
compensate DSC and its affiliates for any claims, losses, liabilities, damages,
deficiencies, costs and expenses, including reasonable attorneys' fees and
expenses, and expenses of investigation and defense ("Losses"), incurred by DSC,
its officers, directors, or affiliates (including the Surviving Corporation)
directly as a result of any inaccuracy or breach of a representation, warranty,
covenant or agreement of CELCORE contained in the Merger Agreement, or any
instrument delivered pursuant to the Merger Agreement, relating to the
intellectual property assets of CELCORE. In the Merger Agreement, DSC agreed to
act in good faith and in a commercially reasonable manner to mitigate all Losses
it may suffer. Upon receipt by the Escrow Agent at any time on or before the
last day of the Escrow Period of a certificate signed by any officer of DSC
stating that DSC has accrued or reasonably anticipates that it will accrue
Losses, and specifying the basis for such Losses, the Escrow Agent will deliver
to DSC out of the DSC Escrow Fund shares of DSC Common Stock in an amount equal
to such Losses. However, DSC will not be entitled to make a claim for payment of
Losses until DSC has suffered Losses of $100,000 in the aggregate. Thereafter,
DSC will be entitled to indemnification for all Losses without regard to such
$100,000 threshold. The Escrow Agent will make no delivery to DSC of any shares
in the DSC Escrow Fund unless the Escrow Agent has received written
authorization from the Representative to make such delivery or if the
Representative fails to object after 30 days from the date notice was given. No
delivery of DSC Common Stock may be made if the Representative delivers a
written objection to the claim to the Escrow Agent. If DSC and the
Representative are unable to agree upon the rights of the respective parties
with respect to a claim, either DSC or the Representative may demand arbitration
of the matter before a panel of three arbitrators. The decision of a majority of
the arbitrators as to the validity and amount of any claim will be binding and
conclusive upon the parties. For the purposes of determining the number of
shares of DSC Common Stock to be delivered to DSC out of the DSC Escrow Fund
pursuant to the indemnification provisions of the Merger Agreement, the shares
of DSC Common Stock will be valued at
 
                                       41
<PAGE>   48
 
the average of the reported last sale price of a share of DSC Common Stock as
reported by the NASDAQ National Market for the 10 consecutive trading days
ending immediately preceding the second trading day before the date such
determination is made. Upon receipt by the Escrow Agent at any time on or before
the last day of the Escrow Period, as appropriate, of a certificate signed by
the Representative stating that the Representative has paid or properly accrued
or reasonably anticipates that he will have to pay or accrue Representative
Expenses, the Escrow Agent will deliver to the Representative out of the
Representative Escrow Fund, as promptly as practicable, shares of DSC Common
Stock held in the Representative Escrow Fund in an amount equal to such
Representative Expenses. For the purposes of determining the number of shares of
DSC Common Stock to be delivered to Representative out of the Representative
Escrow Fund pursuant to the indemnification provisions of the Merger Agreement,
the shares of DSC Common Stock will be valued at the last reported sale price of
a share of DSC Common Stock as reported by the NASDAQ National Market on the
date such determination is made.
 
     Subject to the following requirements, the Escrow Funds will be in
existence immediately following the Effective Time and will terminate at 5:00
p.m., Texas time, on the Expiration Date (the "Escrow Period"). On the
Expiration Date the shares comprising the Escrow Funds less any payment under
the indemnification provision of the Merger Agreement ("Loss Amounts") and
Representative Expenses will be released from the Escrow Funds and distributed
to the stockholders of CELCORE and, with respect to the DSC Escrow Fund, to
those individuals who have on or prior to the Expiration Date exercised CELCORE
Options assumed by DSC (the "Escrow Release"). Notwithstanding the above, with
respect to the DSC Escrow Fund, the Escrow Release will not occur and the Escrow
Period will not terminate with respect to such amount (or some portion thereof)
that is necessary in the reasonable judgment of DSC, subject to the objection of
the Representative and the arbitration provisions of the Merger Agreement, to
satisfy any unsatisfied claims concerning facts and circumstances existing prior
to the contemplated date of the Escrow Release or the termination of the Escrow
Period. Additionally, with respect to the Representative Escrow Fund, the Escrow
Release will not occur and the Escrow Period will not terminate with respect to
such amount (or some portion thereof) that is necessary in the reasonable
judgment of the Representative to satisfy any unsatisfied claims concerning
facts and circumstances existing prior to the contemplated termination of the
Escrow Period. As soon as all such claims have been resolved, the Escrow Agent
will deliver to CELCORE's stockholders the portion of the Escrow Funds not
required to satisfy such claims. Deliveries of the DSC Escrow Amount and the
Representative Escrow Amount, as applicable, to the CELCORE stockholders and
holders of CELCORE Options will be made in proportion to their respective
original contributions to the Escrow Funds.
 
     Any shares of DSC Common Stock or other equity securities issued or
distributed by DSC, including shares issued upon a stock split ("New Shares"),
in respect of DSC Common Stock in the Escrow Funds which have not been released
from the Escrow Funds will be added to the Escrow Funds and become a part
thereof. New Shares issued in respect of shares of DSC Common Stock which have
been released from the Escrow Funds will not be added to the Escrow Funds but
will be distributed to the record holders thereof. Cash dividends on DSC Common
Stock, if any, will not be added to the Escrow Funds but will be distributed to
the record holders thereof. Each stockholder of CELCORE and each individual who,
prior to the Expiration Date, has exercised CELCORE Options assumed by DSC, will
have voting rights with respect to the shares of DSC Common Stock contributed to
the Escrow Funds by such party (and on any voting securities added to the Escrow
Funds in respect of such shares of DSC Common Stock).
 
     The Merger Agreement provides that the Representative will not be liable
for any act done or omitted hereunder as Representative while acting in good
faith. The Merger Agreement further provides that the CELCORE stockholders on
whose behalf the DSC Escrow Amount was contributed to the DSC Escrow Fund must
severally indemnify the Representative and hold the Representative harmless
against any loss, liability or expense incurred without negligence or bad faith
on the part of the Representative and arising out of or in connection with the
acceptance or administration of the Representative's duties thereunder,
including the reasonable fees and expenses of any legal counsel retained by the
Representative. A decision, act, consent or instruction of the Representative
relating to the DSC Escrow Fund shall constitute a decision of all CELCORE
stockholders (except such stockholders of CELCORE, if any, that have perfected
appraisal rights under the DGCL), and shall be final, binding and conclusive
upon each of such CELCORE stockholders, and
 
                                       42
<PAGE>   49
 
the Escrow Agent and DSC may rely upon any such decision, act, consent or
instruction of the Representative as being the decision, act, consent or
instruction of each such CELCORE stockholder. In the absence of bad faith, the
Escrow Agent and DSC are relieved from any liability to any person for any acts
done by them in accordance with such decision, act, consent or instruction of
the Representative.
 
     BY APPROVING THE MERGER AGREEMENT, CELCORE'S STOCKHOLDERS (OTHER THAN
HOLDERS OF DISSENTING SHARES) WILL BE DEEMED TO HAVE CONSENTED TO THE
ESTABLISHMENT OF THE ESCROW FUNDS AND THE APPOINTMENT OF ROBERT P. GOODMAN TO
ACT AS REPRESENTATIVE ON BEHALF OF CELCORE'S STOCKHOLDERS UNDER THE MERGER
AGREEMENT AND THE ESCROW AGREEMENTS WITH THE ESCROW AGENT TO DELIVER SHARES HELD
IN ESCROW TO DSC IN SATISFACTION OF CERTAIN CLAIMS BROUGHT BY DSC, AND THE
REPRESENTATIVE IN SATISFACTION OF THE REPRESENTATIVE EXPENSES, TO OBJECT TO SUCH
DELIVERIES, TO AGREE TO, TO NEGOTIATE AND TO ENTER INTO SETTLEMENTS AND
COMPROMISES WITH RESPECT TO SUCH CLAIMS, AND TO TAKE CERTAIN OTHER ACTIONS ON
BEHALF OF CELCORE'S STOCKHOLDERS, ALL AS MORE FULLY DESCRIBED IN ARTICLE IX OF
THE MERGER AGREEMENT. SEE ARTICLE IX OF THE MERGER AGREEMENT FOR A MORE DETAILED
EXPLANATION OF THE ESCROW FUNDS AND RIGHTS WITH RESPECT THERETO.
 
CERTAIN REPRESENTATIONS AND WARRANTIES
 
     The Merger Agreement contains various representations and warranties of
DSC, Merger Subsidiary and CELCORE relating to, among other things, the
following matters (which representations and warranties are subject, in certain
cases, to specified exceptions and generally apply only to facts and
circumstances existing as of the date of the Merger Agreement): (i) the due
organization, valid existence, good standing, power, and authority of, and
necessary governmental approvals secured by, and similar corporate matters with
respect to, each of DSC, CELCORE, Merger Subsidiary, and the subsidiaries of
CELCORE (the "Subsidiaries"); (ii) the delivery of, and absence of violation of,
the Certificate of Incorporation and Bylaws (collectively, "Organizational
Documents") of each of DSC, CELCORE, Merger Subsidiary, and the Subsidiaries;
(iii) the capital structure of each of DSC, CELCORE, Merger Subsidiary, and the
Subsidiaries; (iv) the power and authority of each of the parties to the Merger
Agreement to execute the Merger Agreement and to perform its obligations
thereunder, and its due authorization, execution, delivery, and validity; (v)
the absence of conflict with the Organizational Documents, with domestic or
foreign laws, rules, regulations, Orders, judgments, or decrees, and with notes,
bonds, indentures, mortgages, contracts, agreements, permits, leases, licenses,
franchises, and other instruments or obligations; (vi) the absence of certain
governmental consent, approval, authorization, permit, notification, and filing
requirements; (vii) the possession of all franchises, grants, authorizations,
licenses, permits, easements, variances, exceptions, consents, certificates,
approvals, and Orders of any governmental authority necessary to carry on the
business of CELCORE and the Subsidiaries; (viii) reports and other documents
filed by DSC with the Commission and the accuracy of the information contained
therein; (ix) the accuracy of the financial statements prepared by CELCORE; (x)
the absence of certain changes or events prior to the date of the Merger
Agreement having a material adverse effect on CELCORE, the Subsidiaries, DSC, or
Merger Subsidiary; (xi) the absence of certain pending or threatened litigation
against CELCORE or the Subsidiaries; (xii) the existence and content of employee
benefit plans, employment contracts, and severance agreements of CELCORE and the
Subsidiaries; (xiii) the absence of any collective bargaining agreement or other
labor union contract applicable to CELCORE or the Subsidiaries; (xiv) the
intellectual property rights used, employed, exploited, or licensed by CELCORE
or any Subsidiary; (xv) currency and completeness of tax filings, payments, and
accruals by CELCORE, and the Subsidiaries; (xvi) the absence of actions by
CELCORE or any Subsidiary preventing the Merger from qualifying as a
reorganization under Section 368(a) of the Code; (xvii) certain environmental
matters; (xviii) the absence of defects in any products of CELCORE and the
Subsidiaries; (xix) the engagement and opinion of DLJ; (xx) the vote required by
stockholders of CELCORE; (xxi) the absence of brokers', finders', or investment
bankers' fees incurred by CELCORE, the Subsidiaries, DSC, and Merger Subsidiary;
(xxii) the validity of CELCORE's and the Subsidiaries' title and interest in
properties and assets; (xxiii) the material contracts to which CELCORE or any
Subsidiary is a party; (xxiv) the absence of certain unlawful
 
                                       43
<PAGE>   50
 
business practices by CELCORE, the Subsidiaries, and their officers, directors,
agents, and employees; (xxv) real property leased by CELCORE and the
Subsidiaries; (xvi) insurance policies to which CELCORE or any Subsidiary has
been a party, named insured, or other beneficiary; (xvii) the recommendation of
the Merger by the Board of Directors of CELCORE; (xviii) contractual or other
provisions relating to "changes in control" or similar occurrences; (xix)
absence of payments and other benefits payable to officers, directors and
employees as a result of the Merger; and (xxx) compliance with state takeover
statutes, including Section 203 of the DGCL.
 
CONDUCT OF BUSINESS PENDING THE MERGER
 
     CELCORE has agreed that, between the date of the Merger Agreement and the
Effective Time, except for certain transactions previously disclosed to DSC or
as contemplated by the Merger Agreement, unless DSC otherwise agrees in writing,
(i) the business of CELCORE will be conducted only in, and CELCORE will not, and
will cause the Subsidiaries not to take any action except in, the ordinary
course of business consistent with past practice and in accordance with all
applicable laws, (ii) CELCORE will use all reasonable efforts to preserve
substantially intact its business organization, to keep available the services
of the current officers, employees and consultants of CELCORE and to preserve
the current relationships of CELCORE with customers, suppliers and other persons
with which CELCORE has significant business relations, (iii) CELCORE will not,
and will not permit any Subsidiary to, engage in any practice, take any action,
or enter into any of a number of enumerated transactions relating to changes or
events having a material adverse effect on CELCORE or the Subsidiaries, and (iv)
CELCORE will keep in full force and effect liability and other insurance and
bonds comparable in amount and scope of coverage to that currently maintained
and described in a list previously provided to DSC.
 
NO SOLICITATION OF TRANSACTIONS
 
     The Merger Agreement provides that CELCORE will not, directly or
indirectly, negotiate with any person other than DSC or Merger Subsidiary with
respect to the acquisition of CELCORE or the shares of CELCORE Capital Stock and
it will not, and will not permit any of its officers, directors, employees,
agents or representatives (including, without limitation, investment bankers,
attorneys and accountants) to (i) initiate contact with, (ii) make, solicit or
encourage any inquiries or proposals, (iii) enter into, or participate in, any
discussions or negotiations with, (iv) disclose, directly or indirectly, any
information not customarily disclosed concerning the business and properties of
CELCORE or any of the Subsidiaries to or (v) afford any access to any of
CELCORE's or any of the Subsidiaries' properties, books and records to any
person in connection with any possible proposal relating to (a) the disposition
of their respective businesses or substantially all or a significant portion of
their assets, (b) the acquisition of equity or debt securities of CELCORE or any
of the Subsidiaries, or (c) the merger, share exchange or business combination,
or similar acquisition transaction of or involving CELCORE or any of the
Subsidiaries with any person other than DSC or Merger Subsidiary. CELCORE also
agrees to cease and cause to be terminated any existing solicitation,
initiation, encouragement, activity, discussion or negotiation with any parties
conducted up to and including the date of the Merger Agreement with respect to
any of the foregoing. However, the Merger Agreement allows the Board of
Directors of CELCORE to furnish information concerning CELCORE pursuant to a
confidentiality agreement and participate in negotiations regarding an
unsolicited alternative proposal ("Superior Proposal") that involves
consideration to CELCORE's stockholders with a value that CELCORE's Board of
Directors reasonably believes, after receiving written advice from DLJ, is
superior to the consideration provided for in the Merger after taking into
account the liability in respect of the Transaction Fee (as defined below) if,
based on the written advice from outside counsel, CELCORE's Board of Directors
determines in good faith that it must do so in order to discharge its fiduciary
duties under the DGCL. CELCORE agrees to notify DSC promptly if any request for
information or any proposal or any inquiry is made and in any such notice to
DSC, to indicate in reasonable detail the identity of the person making such
request, proposal or inquiry and the terms and conditions of such request,
proposal. CELCORE also agrees that neither CELCORE's Board of Directors nor any
committee thereof will withdraw or modify, or propose to withdraw or modify, in
a manner adverse to DSC, the approval (including CELCORE's Board of Directors or
any committee's resolution thereof providing for such approval) or
recommendation by CELCORE's Board of Directors or committee
 
                                       44
<PAGE>   51
 
thereof of the Merger Agreement or the Merger. Additionally, CELCORE agrees that
neither the CELCORE's Board of Directors nor any committee thereof will approve
or recommend, or propose to approve or recommend any takeover proposal of
CELCORE, except in connection with a Superior Proposal and then only at or after
the termination of the Merger Agreement by DSC by reason of the Board of
Directors of CELCORE resolving or recommending to the holders of CELCORE Capital
Stock any Business Combination Transaction (as defined below).
 
CONDITIONS TO THE CONSUMMATION OF THE MERGER
 
     The Merger Agreement provides that the obligations of CELCORE, DSC and
Merger Subsidiary to consummate the Merger are subject to the satisfaction of
conditions, including: (i) the Registration Statement shall have been declared
effective by the Commission under the Securities Act and no stop order
suspending the effectiveness of the Registration Statement shall have been
issued by the Commission therefor and no proceedings for that purpose shall have
been initiated or, to the knowledge of DSC or CELCORE, threatened by the
Commission; (ii) the Merger Agreement and the transactions contemplated
thereunder must have been approved and adopted by the affirmative vote of the
stockholders of CELCORE in accordance with the DGCL, CELCORE's Certificate of
Incorporation and Bylaws and the rules of the National Association of Securities
Dealers, Inc. and the holders of CELCORE Preferred Stock must have waived their
Liquidation Rights provided for in CELCORE's Certificate of Incorporation and
Certificates of Designations; (iii) there must not be pending any proceeding by
any governmental authority challenging or seeking material damages in connection
with the Merger or the conversion of CELCORE Capital Stock into DSC Common Stock
or seeking to restrain or prohibit the consummation of the Merger or the
transactions contemplated thereunder or otherwise limiting the right of DSC to
own or operate all or any portion of the business or assets of CELCORE at and
after the Effective Time; (iv) no governmental authority may have enacted,
issued, promulgated, enforced or entered any Order which is in effect and which
has the effect of making the Merger illegal or otherwise prohibiting
consummation of the Merger or the transactions contemplated thereunder; (v) DSC
and CELCORE must have received from the NASDAQ National Market evidence that the
shares of DSC Common Stock to be issued to the stockholders of CELCORE in the
Merger have been approved for quotation on the NASDAQ National Market
immediately following the Effective Time; (vi) any applicable waiting period
under the HSR Act relating to the Merger must have expired or been terminated;
(vii) receipt by DSC and CELCORE of written tax opinions from their respective
counsel to the effect that the Merger will constitute a tax-free reorganization
under the Code; and (viii) all other consents and waivers required to be
obtained and all filings or notices required to be made by DSC, Merger
Subsidiary and/or CELCORE prior to consummation of the Merger (other than filing
an appropriate Certificate of Merger with the Secretary of State of the State of
Delaware in accordance with the DGCL) must have been obtained from and made with
all required governmental authorities. The approval of the payments under the
Employment Agreement is not a condition to the consummation of the Merger.
 
     Under the Merger Agreement, the obligations of DSC and Merger Subsidiary to
consummate the Merger are subject to the satisfaction of certain further
conditions, including: (i) CELCORE must have performed and complied in all
material respects with all obligations and covenants required by the Merger
Agreement, delivered each document that must be delivered and each of the
representations and warranties of CELCORE contained in the Merger Agreement must
be true and correct in all material respects as of the Effective Time; (ii) DSC
must have received from each affiliate of CELCORE and any other person who may
be deemed to have become an affiliate of CELCORE (under Rule 145 of the
Securities Act) after the date of the Merger Agreement and on or prior to the
Effective Time a signed Affiliate Agreement (a form of which is attached to the
Merger Agreement as Exhibit B); (iii) since the date of the Merger Agreement, no
material adverse change in the financial condition, results of operations or
business of CELCORE and the Subsidiaries, taken as a whole, may have occurred,
and neither CELCORE nor any Subsidiary may have suffered any damage, destruction
or loss materially affecting the business or properties of CELCORE and the
Subsidiaries, taken as a whole; (iv) DSC must have received from Powell,
Goldstein, Frazer & Murphy LLP, counsel to CELCORE, a written opinion dated as
of the Closing Date covering the matters set forth on Exhibit F to the Merger
Agreement; (v) the holders of CELCORE Preferred Stock must have waived any
Liquidation Rights as provided in the Certificate of Incorporation and
Certificates of Designations of CELCORE;
 
                                       45
<PAGE>   52
 
(vi) CELCORE shall have obtained all material consents of each other person
whose consent is required in connection with the Merger; (vii) DSC shall have
received from CELCORE "cold comfort" letters of KPMG Peat Marwick LLP dated as
of the Effective Time; and (viii) the CELCORE Stockholders must approve the
Merger and the transactions contemplated thereby and, in the aggregate, not more
than 10% of the outstanding shares of CELCORE Capital Stock are subject to
claims for appraisal rights as provided for under the DGCL, or converted into
cash as a result of being fractional shares.
 
     Under the Merger Agreement, the obligations of CELCORE to consummate the
Merger are subject to the satisfaction of the following further conditions: (i)
DSC and Merger Subsidiary must have performed and complied in all material
respects with all obligations and covenants required by the Merger Agreement and
each of the representations and warranties of DSC and Merger Subsidiary
contained in the Merger Agreement must be true and correct in all material
respects; (ii) since the date of the Merger Agreement, no material adverse
change in the financial condition, results of operations or business of DSC and
its subsidiaries, taken as a whole, may have occurred, and DSC and its
subsidiaries may not have suffered any damage, destruction or loss materially
affecting the business or properties of DSC and its subsidiaries, taken as a
whole; and (iii) CELCORE must have received from Baker & McKenzie, as counsel to
DSC, a written opinion dated as of the Closing Date covering the matters set
forth on Exhibit G to the Merger Agreement.
 
TERMINATION
 
     The Merger Agreement provides that it may be terminated and the Merger and
the other transactions contemplated by the Merger Agreement may be abandoned at
any time prior to the Effective Time, notwithstanding any requisite approval and
adoption of the Merger Agreement and the transactions contemplated thereby, as
follows: (i) by mutual written consent duly authorized by the Board of Directors
of CELCORE and the Boards of Directors of DSC and Merger Subsidiary; (ii) by
either DSC or CELCORE, if either the Effective Time has not occurred on or
before January 31, 1998, (provided, however, that the right to terminate the
Merger Agreement described in this clause (ii) will not be available to any
party whose failure to fulfill any obligation under the Merger Agreement has
been the cause of, or resulted in, the failure of the Effective Time to occur on
or before such date) or there is any Order which is final and nonappealable
preventing the consummation of the Merger, except if the party relying on such
Order has not complied with its obligations relating to obtaining any consents,
licenses, permits, waivers, approvals, authorizations, or Orders required to be
obtained from governmental authorities in connection with the Merger Agreement
(see "The Merger -- Regulatory Approvals"); (iii) by either DSC or CELCORE, if
the stockholders of CELCORE fail to approve and adopt the Merger Agreement, the
Merger and the other transactions contemplated by the Merger Agreement at a
meeting duly convened therefor; (iv) by either DSC or CELCORE, if the holders of
CELCORE Preferred Stock fail to waive their Liquidation Rights; (v) by DSC, upon
a breach of any representation, warranty, covenant or agreement on the part of
CELCORE set forth in the Merger Agreement, or if any representation or warranty
of CELCORE is not true and correct in all material respects, in either case such
that the conditions to the consummation of the Merger would not be satisfied,
other than a breach that would not have a material adverse effect on CELCORE (a
"Terminating CELCORE Breach") (provided, however, that, if such Terminating
CELCORE Breach is curable by CELCORE through the exercise of its best efforts
and for so long as CELCORE continues to exercise such best efforts, DSC may not
terminate the Merger Agreement as provided in this clause (v)); (vi) by CELCORE,
upon breach of any representation, warranty, covenant or agreement on the part
of DSC set forth in the Merger Agreement, or if any representation or warranty
of DSC is not true and correct in all material respects, in either case such
that the conditions to the consummation of the Merger would not be satisfied,
other than a breach that would not have a material adverse effect on DSC (a
"Terminating DSC Breach") (provided, however, that, if such Terminating DSC
Breach is curable by DSC through the exercise of its best efforts and for so
long as DSC continues to exercise such best efforts, CELCORE may not terminate
the Merger Agreement as provided in this clause (vi)); (vii) by DSC if the Board
of Directors of CELCORE withdraws its recommendation to the holders of CELCORE
Capital Stock to approve the Merger; (viii) by DSC, if the Board of Directors of
CELCORE resolves or recommends to the holders of CELCORE Capital Stock any
transaction (a "Business Combination Transaction") involving (A) any merger,
consolidation, share exchange, business combination or other similar transaction
(other than the Merger); (B) any sale,
 
                                       46
<PAGE>   53
 
lease, exchange, transfer or other disposition (other than a pledge or mortgage)
of 25% or more of the assets of CELCORE and the Subsidiaries, taken as a whole,
in a single transaction or series of transactions; or (C) the acquisition by a
person or any "group" (as such term is defined under Section 13(d) of the
Exchange Act) of beneficial ownership of 33 1/3% or more of the shares of
CELCORE Capital Stock, considered as a whole, whether by tender offer, exchange
offer or otherwise; and (ix) by CELCORE, if the Average Trading Price is less
than $25.00 per share.
 
TRANSACTION FEE; EXPENSES; DAMAGES
 
     The Merger Agreement provides that CELCORE will pay DSC a Transaction Fee
of $5 million, less any of DSC's expenses previously paid, if the Merger
Agreement is terminated as described in clauses (iii) or (iv) of "Termination"
above and any Business Combination Transaction is thereafter consummated within
12 months of such termination, or as described in clause (viii) of "Termination"
above.
 
     Under the Merger Agreement, DSC will be entitled to receive its expenses
(but not the Transaction Fee) up to $1 million in immediately available funds in
the event that the Merger Agreement is terminated by DSC as described in clause
(v) of "Termination" above and one-half of its expenses up to $500,000 in
immediately available funds if the Merger Agreement is terminated by DSC as
described in clauses (iii) or (iv) of "Termination" above. CELCORE will be
entitled to receive its expenses up to $500,000 in immediately available funds
if the Merger Agreement is terminated by CELCORE as described in clause (vi) of
"Termination" above.
 
     The Merger Agreement provides that no termination of the Merger Agreement
as a result of the matters as described in clauses (v) or (vi) of "Termination"
above will prejudice the ability of a non-breaching party from seeking damages
from any other party for any breach of the Merger Agreement, including, without
limitation, attorneys' fees and the right to pursue any remedy at law or in
equity.
 
     The Merger Agreement provides that, notwithstanding the foregoing, if DSC
is required to file suit to seek the Transaction Fee or either DSC or CELCORE is
required to file suit to seek its expenses and such party ultimately succeeds on
the merits, such party shall be entitled to all costs and expenses incurred in
enforcing its rights.
 
AMENDMENT AND WAIVER
 
     The Merger Agreement may be amended by the parties thereto by action taken
by or on behalf of their respective Boards of Directors at any time prior to the
Effective Time. However, after the approval and adoption of the Merger Agreement
and the transactions contemplated thereby by the stockholders of CELCORE, no
amendment may be made which would violate the DGCL.
 
     The Merger Agreement also provides that, at any time prior to the Effective
Time, any party thereto may (i) extend the time for the performance of any
obligation or other act of any other party thereto, (ii) waive any inaccuracy in
the representations and warranties contained therein or in any document
delivered pursuant thereto and (iii) waive compliance with any agreement or
condition contained therein.
 
EFFECT OF THE MERGER ON CELCORE OPTIONS
 
     DSC has agreed that each CELCORE Option outstanding at the Effective Time,
except for certain BFG Options, whether or not exercisable, whether or not
vested, and whether or not performance-based, will remain outstanding following
the Effective Time. See "The Merger -- Interests of Certain Persons; Possible
Conflicts of Interest." At the Effective Time, CELCORE Options, except for
certain BFG Options, will, by virtue of the Merger and without any further
action on the part of the holders thereof or CELCORE, be assumed by DSC. Each
CELCORE Option assumed by DSC (each a "Substitute Option") will be exercisable
upon the same terms and conditions as under the 1995 Plan and the 1996 Plan, as
applicable, and the applicable option agreement issued thereunder, except that
(i) each Substitute Option will be exercisable for, and represent the right to
acquire, that whole number of shares of DSC Common Stock (rounded up or down to
the nearest whole share) equal to the number of shares of CELCORE Common Stock
subject to such Substitute Option
 
                                       47
<PAGE>   54
 
multiplied by the Exchange Ratio; (ii) the option price per share of DSC Common
Stock will be an amount equal to the option price per share of CELCORE Common
Stock subject to such Substitute Option in effect immediately prior to the
Effective Time divided by the Exchange Ratio (the option price per share, as so
determined, being rounded upward to the nearest full cent); (iii) with respect
to any Substitute Option which is performance-based, the performance targets
will be adjusted following the Effective Time in the good faith judgment of the
Board of Directors of DSC to fairly reflect the impact, if any, of the
transactions contemplated by the Merger Agreement; and (iv) in the case of any
Substitute Option that remains unexercised as of the termination of the Escrow
Period, the number of shares of DSC Common Stock issuable upon the exercise of
such Substitute Options will be reduced in proportion to any reduction in the
number of shares of DSC Common Stock received by holders of the Substitute
Options assumed by DSC which are exercised prior to the Expiration Date as a
result of any distribution made to DSC pursuant to the escrow and
indemnification provisions of the Merger Agreement. No payment will be made for
fractional interests of DSC Common Stock represented by the Substitute Options.
 
     Under the Merger Agreement, as soon as practicable after the Effective
Time, DSC will deliver to each holder of an outstanding CELCORE Option, except
for certain BFG Options, an appropriate notice setting forth such holder's
rights pursuant thereto, and such CELCORE Option will continue in effect on the
same terms and conditions (including any antidilution provisions, and subject to
adjustments required by the Merger Agreement after giving effect to the Merger).
DSC will comply with the terms of all such CELCORE Options and ensure, to the
extent required by, and subject to the provisions of, the 1995 Plan and the 1996
Plan that CELCORE Options, except for certain BFG Options, which qualified as
incentive stock options under Section 422 of the Code prior to the Effective
Time, continue to qualify as incentive stock options after the Effective Time.
Following the Effective Time, DSC has agreed to file a registration statement on
Form S-8 or another appropriate form with the Commission for the shares of DSC
Common Stock subject to CELCORE Options and to use its best efforts to maintain
the effectiveness of such registration statement or registration statements for
so long as Substitute Options remain outstanding. See "The Merger -- Interests
of Certain Persons; Possible Conflicts of Interest" for a discussion of certain
options held by directors and executive officers.
 
                                       48
<PAGE>   55
 
                               VOTING AGREEMENTS
 
VOTING AND PROXY
 
     DSC has entered into Voting Agreements with the Principal Stockholders,
which as of the Record Date together own approximately 5,375,171 shares of
CELCORE Common Stock, or 96.1% of the outstanding shares of CELCORE Common
Stock, approximately 3,079,363 shares of Series A Preferred Stock, or 68.4% of
the outstanding Series A Preferred Stock, approximately 2,807,485 shares of
Series B Preferred Stock, or 93.6% of the outstanding Series B Preferred Stock,
approximately 2,160,846 shares of Series C Preferred Stock, or 71.1% of the
outstanding Series C Preferred Stock, and approximately 2,004,227 shares of
Series D Preferred Stock, or 100% of the outstanding Series D Preferred Stock. A
copy of the form of the Voting Agreement is attached to this Prospectus/Proxy
Statement as Exhibit C to Appendix A. Pursuant to the terms of the Voting
Agreements, the Principal Stockholders have agreed to vote, and has granted an
irrevocable proxy to allow DSC to vote, the Principal Stockholders Shares in
favor of approval of the Merger, the payments under the Employment Agreements
and any matter that could reasonably be expected to facilitate the Merger.
Furthermore, each Principal Stockholder who is a holder of CELCORE Preferred
Stock has also agreed to vote, and have granted an irrevocable proxy to allow
DSC to vote, such shares and to execute written consents with respect to such
shares in favor of the approval of the waiver of any Liquidation Rights of such
Principal Stockholder as provided in CELCORE's Certificate of Incorporation and
Certificates of Designations. DSC and Merger Subsidiary intend that the
Principal Stockholders' Shares be so voted. Each Principal Stockholder has
agreed that it will not, and will not offer or agree to, sell, transfer, pledge,
exchange or otherwise dispose of or encumber any Principal Stockholder Shares
prior to the earlier of (i) the Effective Date, or (ii) the date the Merger
Agreement is terminated pursuant to the terms of the Merger Agreement.
 
WAIVER OF APPRAISAL RIGHTS AND PREFERRED STOCK LIQUIDATION RIGHTS
 
     Pursuant to the Voting Agreements, the Principal Stockholders who are
holders of CELCORE Preferred Stock have waived any Liquidation Rights of such
Principal Stockholder. The Principal Stockholders additionally agreed not to
take any action or actions to perfect any appraisal rights the Principal
Stockholders may have as a result of the Merger under Section 262 of the DGCL.
 
NO VOTING TRUSTS AND AGREEMENTS
 
     Pursuant to the Voting Agreements, each of the Principal Stockholders will
not, and will not permit any entity under such Principal Stockholder's control
to, deposit any shares of CELCORE Capital Stock held by the Principal
Stockholder or such entity in a voting trust or subject any shares of CELCORE
Capital Stock held by the Principal Stockholder or such entity to any
arrangement or agreement with respect to the voting of such shares of CELCORE
Capital Stock, other than agreements entered into with DSC or its affiliates.
 
COVENANTS AND REPRESENTATIONS
 
     Pursuant to the Voting Agreements, each Principal Stockholder has agreed
that it has been advised that (i) the offer, sale and delivery of the DSC Common
Stock to such Principal Stockholder pursuant to the Merger may not be registered
under the Securities Act, despite DSC's obligations to use commercially
reasonable efforts to effect such registration; (ii) if the offer, sale and
delivery of the DSC Common Stock to such Principal Stockholder pursuant to the
Merger has not been registered under the Securities Act, then such shares may
not be offered, sold, pledged, hypothecated or otherwise transferred unless
subsequently registered under the Securities Act or an exemption from such
registration is available; and (iii) even if such sale and delivery to such
Principal Stockholder of shares of DSC Common Stock is registered under the
Securities Act, to the extent such Principal Stockholder is considered an
"affiliate" of CELCORE at the time the Merger Agreement is submitted for a vote
of the stockholders of CELCORE, any public offering or sale by such Principal
Stockholder of its shares of DSC Common Stock will, under current law, require
(a) the further registration under the Securities Act of such shares, which DSC
is obligated to use commercially reasonable efforts to effect, (b) compliance
with Rule 145 promulgated by the Commission under the Securities Act, or (c) the
availability of another exemption from such registration under the Securities
Act.
 
                                       49
<PAGE>   56
 
Furthermore, each Principal Stockholder also has agreed that it understands that
stop transfer instructions will be given to DSC's transfer agents with respect
to the shares of DSC Common Stock receivable by such Principal Stockholder and
that a legend will be placed on the certificates for such shares issued to such
Principal Stockholder, to the extent such Principal Stockholder is considered an
"affiliate" of CELCORE at the time the Merger Agreement is submitted for a vote
of the stockholders of CELCORE.
 
REGISTRATION OF MERGER SHARES
 
     Pursuant to the Voting Agreements, DSC has agreed to use all commercially
reasonable efforts to effect on or before the Effective Time the registration
under the Securities Act, on an applicable form, of the transfer of the shares
of DSC Common Stock to be issued to the Principal Stockholders in exchange for
the Principal Stockholders Shares pursuant to the Merger. In addition, the
Voting Agreements require DSC to use its best efforts to keep such registration
statement effective for the earlier of two years after the Effective Time or
until all shares of DSC Common Stock issued to such Principal Stockholder
pursuant to the Merger have been disposed of by such Principal Stockholder.
 
NO SOLICITATION
 
     Pursuant to the Voting Agreements, each of the Principal Stockholders will
not, and will not permit any entity under such Principal Stockholder's control
to, (i) solicit proxies or become a participant in a "solicitation" (as such
term is defined in Rule 14a-11 under the Exchange Act), with respect to any
proposal made in opposition to or competition with consummation of the Merger
and the Merger Agreement, any merger, consolidation, share exchange, sale of
securities or assets, reorganization, recapitalization or other business
combination involving CELCORE and any other party (other than DSC and its
affiliates), any liquidation (including the Liquidation Rights provided for in
the Certificate of Incorporation and Certificates of Designations of CELCORE),
or winding up of CELCORE and any other matter that would, or could reasonably be
expected to, prohibit or discourage the Merger (each of the foregoing is
referred to as an "Opposing Proposal"), or otherwise encourage or assist any
party in taking or planning any action that would compete with, restrain or
otherwise serve to interfere with or inhibit the timely consummation of the
Merger in accordance with the terms of the Merger Agreement, (ii) initiate a
stockholders' vote or action by consent of the stockholders of CELCORE or (iii)
become a member of a "group" (as such term is used in Section 13(d) of the
Exchange Act) with respect to any voting securities of CELCORE with respect to
an Opposing Proposal.
 
COVENANT NOT-TO-COMPETE
 
     Robert P. Goodman, Chairman of the Board and Chief Executive Officer of
CELCORE, has executed a covenant not-to-compete as part of his Voting Agreement.
Mr. Goodman has agreed that for a period commencing upon the Closing Date and
ending on the fifth anniversary thereof (unless extended pursuant to the terms
of the Voting Agreement) he will not, directly or indirectly, either as an
employer, consultant, agent, principal, partner, stockholder, or in any other
capacity, engage or participate in any business that is involved in a Prohibited
Business, within any state or country in which CELCORE, DSC or DSC's
subsidiaries is conducting or reasonably expects to conduct or expend its
business. Mr. Goodman has represented that the enforcement of the covenant
not-to-compete will not be unduly burdensome to him and further represents and
acknowledges that he is willing and able to compete in other geographical areas
not prohibited by the covenant not-to-compete. Notwithstanding the foregoing,
Mr. Goodman will not be prohibited from owning up to 5% of the outstanding
capital stock of any class of capital stock registered under Section 12(b) or
(g) of the Exchange Act. Mr. Goodman also agrees he will not for a period
commencing upon the Closing Date and ending upon the first anniversary thereof,
either directly or indirectly, (A) make known to any person, firm or corporation
involved in a Prohibited Business the names and addresses of any of the
customers of CELCORE or contacts of CELCORE or any other information pertaining
to such persons, (B) call on, solicit or take away, or attempt to call on,
solicit or take away any of the customers of CELCORE on whom he called or with
whom he became acquainted during his association with CELCORE for any other
person, firm or corporation involved in a Prohibited Business or (C) recruit or
hire or attempt to recruit or hire, directly or by assisting
 
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<PAGE>   57
 
others, any employee, consultant or independent contractor of CELCORE. Mr.
Goodman agreed that a breach or violation of the covenant not-to-compete by him
will entitle DSC to an injunction issued by any court or arbitration panel of
competent jurisdiction restraining any further or continued breach or violation
of the covenant not-to-compete. Such right to an injunction will be cumulative
and in addition to, and not in lieu of, any other remedies to which DSC may show
itself justly entitled. Furthermore, during any period in which Mr. Goodman is
in breach of the covenant not-to-compete, the time period of the covenant
not-to-compete will be extended for an amount of time that Mr. Goodman is in
breach thereof. None of the other Principal Stockholder's Voting Agreements
contain a covenant not-to-compete.
 
                INFORMATION CONCERNING DSC AND MERGER SUBSIDIARY
 
DSC COMMUNICATIONS CORPORATION
 
     DSC designs, develops, manufactures and markets digital switching, access,
transport and network management system products for the worldwide
telecommunications marketplace. These products allow telecommunications service
providers to build and upgrade their networks to support a wide range of voice,
data and video services. DSC offers a comprehensive product line including
digital switching systems, intelligent network products, cellular switching
systems, digital loop carrier products, digital cross-connect products and
optical transmission systems and related advanced network management systems.
DSC develops such systems to meet U.S. and international telecommunications
standards and the specific requirements of the operating companies of the RHCs,
independent telephone companies, long-distance carriers, private networks and
companies operating public and private communications networks in other
countries.
 
     DSC supplies products to a domestic and international customer base,
including local exchange telephone companies, long-distance carriers, cellular
telephone companies, international telephone companies, various Fortune 1000
companies and utility companies. Its domestic customers include the RHCs and
most major domestic independent telephone and long-distance companies, including
MCI Communications Corporation, U.S. Sprint Communications Company L.P., GTE
Communications Systems Corporation and WorldCom, Inc. DSC is also a major
manufacturer of high-capacity cellular switches for Motorola, Inc., a leading
supplier of wireless communication systems throughout the world. International
customers include DDI Corporation of Japan, Tele Danmark, Deutsche Telekom in
Germany, Cable & Wireless PLC and Mercury Communications, Ltd. in the United
Kingdom, British Telecommunications PLC, Telefonos de Mexico, S.A. de C.V. and
AAP Communications, Pty. Ltd. of Australia.
 
     DSC was incorporated under the laws of the State of Delaware in 1976. DSC's
executive offices are located at 1000 Coit Road, Plano, Texas 75075. Its
telephone number is (972) 519-3000.
 
MERGER SUBSIDIARY
 
     Merger Subsidiary was incorporated under the laws of the State of Delaware
on October 6, 1997 by DSC solely for the purpose of effecting the Merger. It has
no material assets and has not engaged in any activities except in connection
with the Merger. All of its outstanding capital stock is owned by DSC. Its
principal executive office is located at 1000 Coit Road, Plano, Texas 75075, and
its telephone number is (972) 519-3000.
 
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<PAGE>   58
 
                         INFORMATION CONCERNING CELCORE
 
                                    BUSINESS
 
OVERVIEW
 
     CELCORE designs, develops, assembles and installs wireless
telecommunication systems for cellular, PCS and wireless local loop applications
in low teledensity markets. CELCORE's "Target Markets" are rural locations and
areas in developing countries and emerging markets with low teledensities and
where wireline or traditional wireless infrastructure is not readily available
or economically feasible. CELCORE's systems utilize proprietary switching
software, distributed processing and open architectures in combination with
commercially available hardware to create scaleable and modular systems which
are designed to be easily adapted to any of the existing air protocol standards.
CELCORE's systems currently support the two most widely deployed air protocol
standards: AMPS, an analog air protocol standard, and GSM, a digital air
protocol standard. Through the use of object oriented technology and modular
hardware, CELCORE plans to support the other air protocol standards in the
future. CELCORE's focus is to provide telecommunications solutions to operators
in its Target Markets by emphasizing low lifetime cost of ownership comprised of
capital investment in telecommunications infrastructure and ongoing operational
costs.
 
     As a result of the worldwide acceptance of the GSM air protocol standard,
CELCORE's business strategy is to concentrate its business activities on
products utilizing the GSM protocol standards. Beginning in 1995, CELCORE has
concentrated its development effort on the GSM system which it believes will be
the most cost-effective and scaleable GSM system available. Currently, CELCORE
has shipped two GSM systems which are being field tested by its customers. With
its experienced management team assembled from major global telecommunications
companies, CELCORE believes it has developed the products, focus, and processes
to allow it to serve system operators and to fill a significant void in the
rapidly expanding worldwide wireless telecommunication market.
 
PRODUCTS
 
     CELCORE offers wireless telecommunications systems comprised of a
combination of discrete products. CELCORE also offers some of its products and
systems on a stand-alone basis. To date, CELCORE's revenues have been derived
mostly from the sale of its GlobalHub product and AMPS systems. In 1997, CELCORE
has increased its focus on the developing and marketing of its future GSM
System. Each of CELCORE's products and systems is described below:
 
     GlobalSwitches. CELCORE's switches route calls, determine which Base
Station will handle each call and manage the call hand-off process between Base
Stations. The AMPS and GSM GlobalSwitches integrate the functions of the MSC,
HLR and BSC into a single hardware platform. Both versions of the GlobalSwitch
support features such as flexible and least cost call routing, in-band and
out-of-band signaling, intersystem networking and hand-off, collection of
billing information, and a full set of custom calling features such as three-way
calling and conferencing. All models of the GlobalSwitch utilize standard Intel
Pentium processors operating over standard buses and industrial computer
chassis. CELCORE provides a variety of GlobalSwitch configurations based upon
capacity and redundancy requirements. Currently, the GSM GlobalSwitch contains
all of the logic and circuitry necessary to directly control radio Base
Stations. CELCORE plans to offer a GSM GlobalSwitch that interfaces with radio
Base Stations on an "A interface" basis. In this configuration, the GlobalSwitch
acts as a low-cost switching system which can be purchased by a system operator
and used with existing GSM Base Stations purchased from any major Base Station
vendor. This "switch only" product is also attractive to traditional
infrastructure manufacturers who may be interested in purchasing the low-cost "A
interface" GSM GlobalSwitch for resale in order to complement their product
lines. One GSM GlobalSwitch can support up to 20,000 subscribers. The AMPS
GlobalSwitch is available in two different capacity configurations. Both
switches are available in redundant and non-redundant configurations. The MSC-8
AMPS GlobalSwitch can support up to 3,000 subscribers and the MSC-24 AMPS
GlobalSwitch can support up to 10,000 subscribers. These two model versions
utilize the same hardware modules and software and can be easily expanded in the
field to meet growing subscriber demand. Both the planned GSM and
 
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<PAGE>   59
 
AMPS versions of the GlobalSwitch can be configured in distributed networks to
increase the overall system capacity to more than 100,000 subscribers.
 
     Network Management System. The NMS is a software application that allows
for the centralized management, configuration and monitoring of all of the
associated wireless infrastructure components, including multiple switches,
GlobalHubs and radio Base Stations. In both the GSM and AMPS versions, the NMS
allows for the gathering of billing data, interaction with external billing
applications, and the remote downloading of software to infrastructure
components, even while the system is processing user traffic. In the fully
integrated CELCORE GSM system, the NMS performs the OMC-S and OMC-R functions,
thus providing provisioning, monitoring and controlling functions for all
switching system and radio system components. Multiple NMS systems can be
connected to either a GSM or AMPS system and can be utilized to perform
different functions. For example, one NMS could be used to monitor alarms while
another collects billing data. The NMS's graphical user interface is easy to use
and is especially appealing to inexperienced system operators.
 
     The GSM version of the NMS system utilizes a client/server architecture.
The server component operates under Windows NT within the GlobalSwitch itself
and is closely coupled to the various logical entities in the GlobalSwitch. The
server component constantly gathers and maintains operational data and
statistics from the other network components. System operators interact with the
server component contained in the GlobalSwitch through client components that
are JAVA-based and support an easy-to-use Windows-based graphical user
interface. All user help screens and on-line documentation is accessible through
the client portion of the system and are accessible through a web browser that
is simple to learn and use.
 
     GlobalCell Base Stations. CELCORE's GlobalCell Base Stations provide the
radio link between CELCORE's GSM or AMPS systems and a subscriber's terminal
equipment. CELCORE currently offers two models of the GSM GlobalCell Base
Station with the smaller model supporting up to 15 traffic channels and the
larger model supporting up to 47 traffic channels. Both models of the GSM
GlobalCell Base Station are manufactured for CELCORE on an OEM basis by Italtel.
CELCORE currently offers two models of its AMPS GlobalCell Base Stations
supporting two to 47 traffic channels. They are manufactured for CELCORE on an
OEM basis by Allen Telecom and 3dbm.
 
     GlobalHub. The GlobalHub is a product used in conjunction with CELCORE's
AMPS system that functions as a VLR and provides a gateway to the IS-41 network,
allowing seamless roaming from one carrier to another. GlobalHub has been
commercially deployed with connections to virtually all major manufacturers'
AMPS systems, which is a distinguishing feature of the GlobalHub product. In
addition, the modularity and the well-layered software architecture of the
GlobalHub allow it to be adapted easily to other applications. For example, the
GlobalHub is sold as a stand-alone product to provide call routing for wireless
PBX systems and for cellular/cordless phones manufactured by Motorola, OKI and
Panasonic.
 
CUSTOMERS
 
     CELCORE's customers include operators such as AT&T Wireless (U.S. and Latin
America), Celumovil (Colombia), Millicom (Russia and Bolivia), Southwestern Bell
Mobile Systems (U.S.), Telecel International (Africa) and Yorkville Telephone
Cooperative (U.S.). Examples of typical customers and applications include: (i)
Millicom International Cellular S.A. (which operates cellular systems in 20
countries around the world), which currently employs CELCORE's AMPS system in
Smolensk, Russia with a population of 350,000; (ii) Telecel International, Ltd.,
which utilizes CELCORE's AMPS system connected to the PSTN via satellite in two
towns in Madagascar with populations of 50,000 and 100,000, respectively; (iii)
Yorkville Telephone Cooperative in rural Tennessee, which uses CELCORE's AMPS
system to serve approximately 9,000 subscribers over an area of approximately
1,500 square miles with a population of approximately 96,000; and (iv)
Celumovil, the largest cellular carrier in Colombia, which uses CELCORE's AMPS
systems in six rural areas of Colombia.
 
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<PAGE>   60
 
SALES AND MARKETING
 
     CELCORE currently markets its systems and products worldwide through its
direct sales force, sales agents, joint ventures and strategic relationships.
CELCORE also intends to form OEM relationships with certain leading
telecommunications manufacturers. CELCORE's direct sales force is located in the
United States, Canada, China, India, Russia, Singapore, and South Africa. As of
September 30, 1997, CELCORE employed 11 salespersons. CELCORE also works with
sales agents in certain countries such as Brazil, Malaysia and Indonesia.
 
     Both the direct sales personnel and independent sales agents generate
sales, and provide system support, customer service, and customer feedback for
systems development. In addition, the sales personnel and independent sales
agents receive support from CELCORE's marketing, system support and customer
service departments. As CELCORE's potential customer base expands, CELCORE
intends to further expand the number of its direct sales force personnel and its
network of independent sales agents.
 
SERVICE AND SUPPORT
 
     CELCORE's operations department provides pre-sale, installation and
post-sale support to those who have purchased CELCORE's systems, and operators
evaluating CELCORE's products. The operations department also offers seven-day,
24-hour toll-free telephone service to system operators. CELCORE provides
extensive documentation on its products to operators of CELCORE's systems, as
well as training courses which are offered either on-site or at CELCORE's
facilities. CELCORE personnel typically diagnose and solve system operators'
problems over the telephone but are available to travel on-site in order to
diagnose and correct any problems.
 
     CELCORE offers a maintenance program for its products, which consists of
product enhancements, product updates and technical support. Maintenance is
provided without additional charge during the one-year warranty period offered
pursuant to CELCORE's standard form license agreement. System operators may
renew maintenance and support on an annual basis by paying the then-current
maintenance fee. System operators may also subscribe for maintenance and product
support over extended periods of time. Recurring post first year maintenance
charges are recognized ratably over the maintenance period.
 
RESEARCH AND DEVELOPMENT
 
     To maintain and improve its competitive position, CELCORE's research and
development efforts will continue to focus primarily on the development of its
GSM system. CELCORE has developed a core competency in GSM technology through
the design and continued development of its GSM system. In addition, CELCORE
will continue to consider strategic opportunities and will invest in
complementary programs that will help achieve its goals in its Target Markets.
 
     While CELCORE is committed to maintaining its leading edge position in
scaleable equipment for the GSM market, it is also committed to supporting other
air protocol standards for its equipment. Accordingly, CELCORE intends to
migrate the GSM GlobalSwitch to support other air protocol standards by
developing a radio subsystem interface that utilizes the applicable open
standards. This will allow CELCORE's GlobalSwitch to interconnect with radio
Base Stations manufactured by a wide variety of manufacturers that support other
air protocol standards such as TDMA. The software and hardware modularity of the
GSM GlobalSwitch will permit re-use of the elemental software and hardware
components contained in the system as CELCORE migrates its GSM GlobalSwitch to
support other air protocol standards. CELCORE also remains committed to its AMPS
system. The AMPS air protocol standard remains dominant in North America and
Latin America where CELCORE believes that its equipment has substantial market
potential.
 
COMPETITION
 
     The wireless telecommunications market is intensely competitive and
characterized by rapid technological change. CELCORE expects competition from
large and small system suppliers, including suppliers of used equipment.
Competitive large system suppliers include Alcatel, Ericsson, Lucent
Technologies, Motorola,
 
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<PAGE>   61
 
NEC, Nokia, Northern Telecom and Siemens. Competitive small system suppliers
include Comsat RSI/Plexsys, Harris Wireless Access Division, Phoenix Wireless,
TeCore, and Telos Engineering. CELCORE believes that the primary competitive
factors in the market in which CELCORE's products compete are cost-effectiveness
of systems and products, uniqueness of system capabilities, terms and conditions
of vendor financing, responsiveness and breadth of system or product offerings.
While CELCORE believes it is in a position to develop low-cost and reliable
systems, most of CELCORE's current and potential competitors have longer
operating histories, larger installed customer bases, substantially greater name
recognition and significantly greater financial, technical, manufacturing,
marketing, sales, distribution and other resources than CELCORE. CELCORE may
also face competition in the future from new market entrants offering other
competing technologies. There can be no assurance that CELCORE will be able to
compete successfully against current and future competitors or that competitive
pressures faced by CELCORE will not materially adversely affect its business,
operating results and financial condition. In addition, increased competitive
pressures could lead to intensified price-based competition, resulting in lower
prices and lower margins, which could materially adversely affect CELCORE's
business, operating results and financial condition.
 
PATENTS AND PROPRIETARY RIGHTS
 
     CELCORE has received three patents in the United States that relate to
using small microsystems as seamless underlays to larger cellular systems (the
"Microsystem Patents"). Another patent relating to CELCORE's GSM systems is
pending. Related patent applications that cover the microsystem inventions have
also been filed in Brazil and Mexico and CELCORE is awaiting action on these
applications.
 
     CELCORE also seeks to protect its intellectual property rights through
trademarks and copyrights and by safeguarding CELCORE's trade secrets through
confidentiality and nondisclosure agreements and other measures. Employees of
CELCORE engaged in system or product development are required to sign agreements
assigning to CELCORE all inventions or other work product developed in
connection with their employment. Nonetheless, there can be no assurance that
such measures will provide adequate protection for CELCORE's proprietary rights
and information, that such rights and information will not be misappropriated,
that disputes as to the ownership of intellectual property will not arise, or
that CELCORE's proprietary rights and information will not otherwise become
known or independently developed by competitors.
 
MANUFACTURING
 
     CELCORE's manufacturing strategy is to use commercially available
microprocessors and other commercially available software and hardware systems
whenever possible. However, CELCORE does design certain key modules and
assemblies that result in cost or performance advantages. CELCORE does not
directly manufacture any of the components used in its systems or products. It
outsources the actual fabrication of its custom designed modules and chassis.
CELCORE does, however, perform final assembly, testing and integration of all of
the components manufactured by others to CELCORE's specifications. Each system
supplied to each customer is fully staged and tested in an operational state in
CELCORE's facilities in order to minimize operational issues during field
deployment.
 
     Certain components included in CELCORE's products are obtained from a
single supplier or a limited group of suppliers. The disruption or termination
of these sources of supply could have an adverse effect on CELCORE's business,
operating results and financial condition. CELCORE believes that alternative
sources could be obtained and qualified to supply these components, if
necessary. Nevertheless, any inability to obtain adequate deliveries or any
other circumstance that would require CELCORE to seek alternative sources of
supply or to manufacture such components internally could delay CELCORE's
ability to ship its products, which could damage relationships with current and
prospective customers and could result in a material adverse effect on CELCORE's
business, operating results and financial condition.
 
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<PAGE>   62
 
EMPLOYEES
 
     As of September 30, 1997, CELCORE employed 175 full-time employees and 24
contract employees. Of all full-time persons employed by CELCORE at such date,
25% hold advanced degrees and 75% hold undergraduate degrees. CELCORE's
employees are not covered by a collective bargaining agreement. CELCORE
considers its relationship with its employees to be good.
 
LEGAL PROCEEDINGS
 
     CELCORE is a party to routine legal proceedings incidental to its business.
CELCORE does not believe the ultimate resolution of these legal proceedings will
have a material adverse effect on its financial position and results of
operations.
 
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion and analysis should be read in conjunction with
CELCORE's "Selected Historical Financial Data" and CELCORE's Financial
Statements and Notes thereto included elsewhere in this Prospectus/Proxy
Statement.
 
OVERVIEW
 
     CELCORE provides functional and scaleable analog and digital cellular
telecommunications equipment designed to meet the needs of rapidly growing lower
teledensity markets which are underserved by traditional equipment suppliers.
CELCORE's switches, Base Stations, GlobalHub product and network management
systems are designed to have the full functionality of traditional wireless
telecommunications systems but at a much lower cost due to their scaleability,
distributed processing architecture and ease of installation and use.
 
     Since its inception in March 1993, CELCORE's revenues have consisted
primarily of sales of AMPS systems and the GlobalHub product. CELCORE began
shipping AMPS systems through an OEM arrangement in 1994 and began shipping AMPS
systems directly to customers in the second half of 1995. CELCORE experienced
decreased revenue growth in 1996 primarily due to slower than expected sales of
its GlobalHub product resulting from slow market acceptance of the cellular
cordless service offered by cellular operators using CELCORE's GlobalHub
product, and the lack of a switching system which supported Base Stations with a
digital air protocol, such as GSM, to accommodate the worldwide transition from
analog to digital wireless service. Revenues increased significantly in the
first nine months of 1997 primarily due to the wider acceptance of CELCORE's
AMPS systems which resulted in the sale of several large AMPS systems.
 
     In 1995, CELCORE began development of its digital GSM system, which is
currently being shipped to customers for evaluation. CELCORE emphasized the
development of a GSM product because it is the leading digital wireless
telecommunications technology in the world, with approximately 200
telecommunication networks being built or operated in 110 countries. It is
expected that by the year 2000 the GSM air protocol standard and its variants,
DCS-1800 and PCS-1900 will represent 50% of the cellular and PCS subscribers in
the world. Because of CELCORE's reliance on its GSM system for a significant
portion of future revenues, CELCORE's historical operating results will not be
comparable to, and should not be relied upon as an indication of, future
operation results. CELCORE's ability to derive future revenues from its GSM
system is subject to certain risks and uncertainties, including risks associated
with the successful completion of the development and market acceptance of such
systems.
 
     CELCORE sells its products worldwide and anticipates a significant portion
of future revenues to come from customers outside the United States. To support
this growth, CELCORE maintains offices or works closely with agents or joint
venture partners in Brazil, China, India, Indonesia, Russia, Singapore and
Thailand. Further, many of CELCORE's customers may require financing to fund
purchases of CELCORE's systems or products. To date, CELCORE has provided only
limited financial assistance to certain of its customers in the form of
extensions of CELCORE's customary payment terms.
 
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<PAGE>   63
 
     Due to CELCORE's limited revenues and high operating expenses, CELCORE has
incurred operating losses in each year since its inception. If CELCORE's
revenues and profit margins do not increase to support the higher levels of
operating expenses or if CELCORE fails to fully develop and market its GSM
system and other digital systems, CELCORE's business, operating results and
financial condition will be materially adversely affected.
 
RESULTS OF OPERATIONS
 
  Nine Months Ended September 30, 1996 Compared to Nine Months Ended September
30, 1997
 
     Revenues. Revenues increased 239.3% from $2.8 million in the nine months
ended September 30, 1996 to $9.5 million in the nine months ended September 30,
1997. This increase in revenues was primarily attributable to greater unit sales
of AMPS systems to new and existing customers, resulting from broader acceptance
of these products. The increase in unit sales of AMPS systems was partially
offset by a decline in shipments of CELCORE's GlobalHub product, which resulted
from the slow market acceptance of the cellular cordless service offered by
cellular operators using the GlobalHub product.
 
     For the nine months ended September 30, 1997, net revenues of approximately
$5.1 million were attributable to two customers located in South America.
 
     Gross Profit. Gross profit margin decreased from 66.7% in the nine months
ended September 30, 1996 to 39.7% in the nine months ended September 30, 1997.
This decrease in gross profit margin was primarily due to sales of CELCORE's
lower margin AMPS systems as compared to sales of higher margin GlobalHub
product.
 
     Research and Development. Research and development expenses increased 43.8%
from $4.8 million in the nine months ended September 30, 1996 to $6.9 million in
the nine months ended September 30, 1997. This increase was primarily
attributable to the increased number of engineering employees, prototype
expenses and consulting costs associated with the development of the new GSM
system and supporting current and future product development and enhancement.
 
     Sales and Marketing. Sales and marketing expenses increased 55.2% from $2.9
million in the nine months ended September 30, 1996 to $4.5 million in the nine
months ended September 30, 1997. This increase was primarily attributable to
increased headcount, commissions, promotional costs and expenditures associated
with foreign sales offices opened in late 1996.
 
     Other Income (expense), net. For the nine months ended September 30, 1996,
the other income, net was $342,000. For the nine months ended September 30,
1997, the balance was a net expense of ($24,000). This decrease was primarily
attributed to interest expense incurred on higher outstanding debt balances
during 1997 and lower interest income earned on lower average cash balances
during the nine months ended September 30, 1997.
 
  Year Ended December 31, 1995 Compared to Year Ended December 31, 1996
 
     Revenues. Revenues decreased 24.5% from $4.9 million in 1995 to $3.7
million in 1996. This decrease was primarily due to a decrease in unit shipments
of CELCORE's GlobalHub product in 1996, which resulted from the slow market
acceptance of the cellular cordless service offered by cellular operators using
the GlobalHub product and the sale of a large AMPS system in 1995 for which
there was no comparable sale in 1996.
 
     Gross Profit. Gross profit margin decreased from 64.1% in 1995 to 63.3% in
1996. This decrease in gross profit margin was primarily due to an increase in
the percentage of sales attributable to CELCORE's lower margin AMPS systems as
compared to sales of the higher margin GlobalHub product.
 
     Research and Development. Research and development expenses increased
103.0% from $3.3 million in 1995 to $6.7 million in 1996. This increase was
primarily attributable to increased headcount and expenses associated with the
enhancement of CELCORE's AMPS systems and GlobalHub product, as well as the
design of its new GSM system.
 
                                       57
<PAGE>   64
 
     Sales and Marketing. Sales and marketing expenses increased 100.0% from
$2.1 million in 1995 to $4.2 million in 1996. This increase was primarily due to
the expansion of CELCORE's sales and marketing organization, including
international operations.
 
     General and Administrative. General and administrative expenses increased
187.0% from $2.3 million in 1995 to $6.6 million in 1996. This increase was
primarily attributable to increases in headcount and related recruitment and
relocation expenses, higher travel costs, increased legal fees and provision for
bad debt.
 
     Other Income, Net. Other income, net increased from $236,000 in 1995 to
$507,000 in 1996. This increase was due to higher interest income earned on
higher average cash balances in 1996.
 
  Year Ended December 31, 1994 Compared to Year Ended December 31, 1995
 
     Revenues. Revenues increased 122.7% from $2.2 million in 1994 to $4.9
million in 1995. This increase was primarily attributable to the commencement of
direct shipments of the AMPS systems and GlobalHub product to customers in
various locations in the United States and abroad.
 
     Gross Profit. Gross profit margin decreased from 67.3% in 1994 to 64.1% in
1995. This decrease was primarily attributable to the sale of non-recurring high
margin product and consulting revenues in 1994.
 
     Research and Development. Research and development expenses increased
230.0% from $1.0 million in 1994 to $3.3 million in 1995. This increase was
primarily attributable to increases in the number of engineering personnel, an
increase in engineering salaries and benefits, and spending on product design
and enhancements activities.
 
     Sales and Marketing. Sales and marketing expenses increased 283.9% from
$547,000 in 1994 to $2.1 million in 1995. This increase was primarily
attributable to increased headcount, commissions, promotional activities and
travel expenses.
 
     General and Administrative. General and administrative expenses increased
285.9% from $596,000 in 1994 to $2.3 million in 1995. This increase was
primarily due to increases in headcount, recruitment and relocation costs, legal
fees and facility expenses.
 
     Other Income, Net. Other income, net increased from $5,000 in 1994 to
$236,000 in 1995. This increase was due to higher interest income earned on
higher average cash balances in 1995.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Historically, CELCORE's cash flow from operations has been insufficient to
satisfy CELCORE's cash requirements. To date, CELCORE has financed its
operations and met its capital expenditure requirements through private sales of
equity securities and bank borrowings. Through September 30, 1997, CELCORE had
raised approximately $40.8 million from sales of equity securities in private
financings and net proceeds from bank borrowings of $2.8 million. At September
30, 1997, CELCORE had $619,000 million in cash and cash equivalents.
 
     Net cash used for operating activities was $1.0 million, $6.2 million,
$15.2 million and $11.7 million in 1994, 1995, 1996 and the nine months ended
September 30, 1997, respectively. The net cash used for operating activities
during such periods was principally due to operating losses and increases in
inventory and accounts receivable.
 
     Net cash used for investing activities was approximately $310,000, $1.5
million, $3.9 million and approximately $1.8 million in 1994, 1995, 1996 and the
nine months ended September 30, 1997, respectively. These expenditures consisted
primarily of purchases of furniture and equipment. CELCORE anticipates that its
capital needs will be approximately $300,000 for the remainder of 1997,
substantially all of which is expected to be used for further purchases of
furniture and equipment.
 
     CELCORE's financing activities generated net cash of $3.2 million, $19.8
million, $16.7 million and $2.1 million, in 1994, 1995, 1996 and nine months
ended September 30, 1997, respectively, primarily from the sale of equity
securities and bank borrowings.
 
                                       58
<PAGE>   65
 
     At September 30, 1997 CELCORE had outstanding borrowings of $450,000 under
a working capital line and approximately $2.4 million under a term loan. In
addition, CELCORE had utilized $375,000 of its working capital line to
collateralize a stand-by letter of credit. All of the borrowings are secured by
substantially all of the assets of CELCORE. As of September 30, 1997, CELCORE
was in default of certain financial covenants contained in the term loan
agreement and have not repaid the outstanding balance from the working capital
line which expired in August 1997. As a result, all outstanding borrowings have
been classified as current at September 30, 1997.
 
     In the fourth quarter of 1997, CELCORE and a subsidiary of DSC entered into
a revolving credit agreement under which CELCORE can borrow up to $10.0 million
for working capital purposes. At October 31, 1997, $4.4 million is outstanding
under the revolving credit agreement. Borrowings are unsecured, bear interest at
11.5% and mature on January 15, 1998.
 
     In October 1997, CELCORE entered into the Merger Agreement with DSC. The
Merger, valued at approximately $167 million (including transaction costs) will
be consummated with the issuance of DSC Common Stock in exchange for all the
outstanding shares of CELCORE Capital Stock. DSC will assume substantially all
CELCORE Options. The Merger is subject to a number of items including
governmental approval and should be completed prior to the end of 1997.
 
     Should the Merger be consummated, CELCORE's short-term and long-term cash
requirements would be funded by DSC. See "The Merger -- Loan by DSC to CELCORE."
It is anticipated that DSC would advance CELCORE the necessary funds to repay
all outstanding borrowings with its bank. However, if the Merger is not
consummated, it would be necessary for CELCORE to find alternative financing,
which may include extending terms with its bank, a debt or equity offering or
other lending sources. There can be no assurance that CELCORE would be able to
raise the necessary funds to sustain future operations. If CELCORE is unable to
obtain additional funding on acceptable terms, its business, operating results
and financial condition would be materially adversely affected.
 
RECENT ACCOUNTING PRONOUNCEMENTS
 
     In February 1997, the Financial Accounting Standards Board (FASB) issued
Statement of Financial Accounting Standards (SFAS) No. 128, "Earnings per
Share", ("FAS 128"). FAS 128 simplifies the standards for computing earnings per
share and is effective for financial statements for both interim and annual
periods ending after December 15, 1997. Earlier application is not permitted.
The adoption of FAS 128 is not expected to have a significant impact on
CELCORE's net income (loss) per share.
 
     In June 1997, the FASB issued SFAS No. 130, "Reporting Comprehensive
Income", ("FAS 130") which establishes standards for reporting and display of
comprehensive income and its components. The required disclosures for FAS 130
will be included in the quarterly financial statements for the first quarter of
1998.
 
     In June 1997, the FASB issued SFAS No. 131, "Disclosure about Segments of
an Enterprise and Related Information" which supersedes existing accounting
standards related to disclosure of operating segment information beginning in
1998. CELCORE has yet to determine the impact of this new standard on its
financial statement disclosures for the 1998 annual financial statements.
 
                                       59
<PAGE>   66
 
                                   MANAGEMENT
 
     The executive officers and directors of CELCORE as of November 5, 1997 are
as follows:
 
EXECUTIVE OFFICERS AND DIRECTORS
 
<TABLE>
<CAPTION>
               NAME                 AGE                        POSITION
               ----                 ---                        --------
<S>                                 <C>   <C>
Robert P. Goodman.................  37    Chairman of the Board and Chief Executive Officer
Thomas R. Berger..................  52    President and Chief Operating Officer
                                          Vice President, Chief Financial Officer and
Joseph J. Gonzalez................  53    Treasurer
Jay M. Rosen......................  59    Vice President, General Counsel and Secretary
Robert M. Flanagan(1)(2)..........  67    Director
G. Felda Hardymon(2)..............  50    Director
Robert E. La Blanc(1).............  63    Director
</TABLE>
 
- ---------------
 
(1) Member of Audit Committee
 
(2) Member of Compensation Committee
 
     All directors of CELCORE hold office until the next annual meeting of
stockholders or until their successors are duly elected and qualified. All
officers serve at the discretion of the Board of Directors.
 
     Robert P. Goodman is a co-founder of CELCORE and has served as Chairman of
the Board and Chief Executive Officer of CELCORE since September 1992. From
November 1987 to April 1994, Mr. Goodman served as Chairman and Chief Executive
Officer of CruisePhone, Inc. ("CruisePhone"), a company he co-founded, which
provides telecommunications services to the maritime industry. From April 1994
to October 1996, Mr. Goodman served solely in the capacity as Chairman of
CruisePhone. From 1988 to 1991, Mr. Goodman served as Chief Executive Officer
and as a director of Boatphone Marketing, a management company for cellular
telecommunication companies in Caribbean countries that he co-founded along with
Cable & Wireless (W.I.) Ltd. From 1986 to 1989, Mr. Goodman served as Vice
President of Caribbean Cellular Telephone, a cellular telecommunications company
he co-founded that serves the British Virgin Islands. Mr. Goodman received a
Bachelor's degree from Brown University and a Masters of Business Administration
degree from the Columbia University Graduate School of Business.
 
     Thomas R. Berger has served as President and Chief Operating Officer of
CELCORE since March 1995. From November 1993 until March 1995, Mr. Berger served
as Senior Vice President, Technology and Operations, of ARDIS, a wholly-owned
subsidiary of Motorola. From May 1990 until November 1993, Mr. Berger was Vice
President, Radio Network and Product Technology, of ARDIS. From February 1973
until May 1990, Mr. Berger held a variety of positions at Motorola, most
recently within the Mobile Data Division as Director of the Federal Express
account, as Product Manager for Automatic Vehicle Location Systems, and as
National Sales Manager for Data Systems. Mr. Berger received a Bachelor of
Science degree from the University of Toledo and a Master's degree in Electrical
Engineering from Cleveland State University.
 
     Joseph J. Gonzalez has served as Vice President and Chief Financial Officer
of CELCORE since January 1996 and as Treasurer of CELCORE since January 1997.
From January 1995 To December 1995, Mr. Gonzalez was a consultant to Global
Information Technologies, Inc. From 1987 to December 1994, Mr. Gonzalez held
various positions with Millicom International Cellular S.A. and its predecessor,
Millicom, Inc., including President of the U.S. subsidiary, American Satellite
Network, Inc., and Vice President Finance and Treasurer of Millicom, Inc.
Previously, he held various financial management positions with MCI and the
American Express Company. Mr. Gonzalez holds a Bachelor of Business
Administration degree in Accounting from Pace College and a Masters of Business
Administration degree from Baruch College of the City University of New York.
 
     Jay M. Rosen has served as Vice President, General Counsel and Secretary of
CELCORE since January 1997. Prior to that time Mr. Rosen was with GTE
Corporation for 28 years in various capacities, most
 
                                       60
<PAGE>   67
 
recently as Vice President and Associate General Counsel, and has a background
in international and transactional matters. He formerly was Vice President and
General Counsel of GTE Telecommunications Products and Services Group and was
responsible for the legal affairs of GTE Mobilnet, GTE Airfone, GTE Information
Services and GTE Government Systems. Mr. Rosen received his Bachelor of Arts
degree from Bowling Green State University. He received his Juris Doctor and LLM
degrees from the New York University School of Law.
 
     Robert M. Flanagan has served as a director of CELCORE since 1992. Since
November 1987, Mr. Flanagan has served as director and in various executive
positions, most recently as Chairman and Chief Executive Officer, of
CruisePhone, a company that he co-founded with Mr. Goodman. From December 1985
until October 1989, Mr. Flanagan served as Managing Director of Caribbean
Cellular Telephone, Ltd., which he also co-founded. From 1976 until 1984, Mr.
Flanagan served in a variety of executive positions with Western Union
Corporation, most recently as Chairman, President and Chief Executive Officer.
 
     G. Felda Hardymon has served as a director of CELCORE since November 1994
as a representative elected by the holders of the Series B Preferred Stock of
CELCORE, which will be converted to DSC Common Stock upon the consummation of
the Merger. Since 1981, Mr. Hardymon has been a partner of Bessemer Venture
Partners, a venture capital firm. Mr. Hardymon presently serves as a director of
Learmonth & Burchett Management Systems PLC, Mobile Systems International, Inc.,
Airtech, Inc., and several privately held companies.
 
     Robert E. La Blanc has served as a director of CELCORE since November 1994.
Mr. La Blanc has served as President of Robert E. La Blanc Associates, Inc., a
telecommunications consulting firm, since 1981. Prior to founding Robert E. La
Blanc Associates, Inc., Mr. La Blanc served as Vice Chairman of Continental
Telecom, a diversified telecommunications company. Prior to joining Continental
Telecom, Mr. La Blanc spent 10 years with the investment banking firm of Salomon
Brothers, where he was a general partner and founder of the firm's
telecommunications group. Mr. La Blanc also serves as a director of The Tribune
Company, a media and broadcasting company, Salient 3 Communications, Inc., a
telecommunications equipment manufacturer, Titan Corp., a defense electronics
company, Norwood Venture Corp., a venture capital firm, and Storage Technology
Corp., a computer equipment manufacturer. Mr. La Blanc serves as a trustee and
director of a number of funds in a family of Prudential mutual funds.
 
                                       61
<PAGE>   68
 
                  COMPENSATION OF CELCORE'S EXECUTIVE OFFICERS
 
     The following Summary Compensation Table sets forth certain information
concerning the annual and long-term compensation for services in all capacities
to CELCORE in the fiscal years ended December 31, 1996, December 31, 1995 and
December 31, 1994 of those persons who during such fiscal year (i) served as
CELCORE's chief executive officer or (ii) were the most highly-compensated other
executive officers (collectively, the "Named Executive Officers"):
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                               LONG-TERM
                                                                              COMPENSATION
                                                                              ------------
                                                                               SECURITIES
                                       ANNUAL COMPENSATION                     UNDERLYING
          NAME AND            FISCAL   --------------------   OTHER ANNUAL      OPTIONS/       ALL OTHER
     PRINCIPAL POSITION        YEAR     SALARY      BONUS     COMPENSATION        SARS        COMPENSATION
     ------------------       ------   ---------   --------   ------------    ------------    ------------
<S>                           <C>      <C>         <C>        <C>             <C>             <C>
Robert P. Goodman,             1996     $115,885    $50,000           --        $  1,500(1)       $575(2)
  Chairman and Chief           1995       90,923      5,000           --           8,000            --
  Executive Officer            1994        9,462         --     $ 66,448(5)           --            --
Thomas R. Berger,              1996      190,516     31,780      144,441(3)      250,000(1)        506(2)
  President and Chief          1995      138,346     35,000           --         250,000            --
  Operating Officer            1994           --         --           --              --            --
Joseph J. Gonzalez,            1996      118,616     24,938       67,344(4)      150,000(1)         93(2)
  Vice President and           1995           --         --           --              --            --
  Chief Financial Officer      1994           --         --           --              --            --
</TABLE>
 
- ---------------
 
(1) Represents options to purchase Common Stock.
 
(2) Represents matching contributions under CELCORE's 401(k) Plan.
 
(3) Represents relocation expenses paid to Mr. Berger in connection with his
    move to the Memphis area.
 
(4) Represents relocation expenses paid to Mr. Gonzalez in connection with his
    move to the Memphis area.
 
(5) Represents partnership distribution paid to Mr. Goodman from Celcore L.P.,
    the predecessor company to CELCORE.
 
                                       62
<PAGE>   69
 
STOCK OPTIONS
 
     The following table sets forth certain information regarding CELCORE
Options granted to the Named Executive Officers for the purchase of CELCORE
Common Stock during the fiscal year ended December 31, 1996.
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                   INDIVIDUAL GRANTS                     POTENTIAL REALIZABLE
                                   --------------------------------------------------      VALUE AT ASSUMED
                                   NUMBER OF    PERCENT OF TOTAL                         ANNUAL RATES OF STOCK
                                     SHARES         OPTIONS                             PRICE APPRECIATION FOR
                                   UNDERLYING      GRANTED TO      PRICE                    OPTION TERM(2)
                                     OPTION       EMPLOYEES IN      PER    EXPIRATION   -----------------------
              NAMES                  GRANTS       FISCAL YEAR      SHARE      DATE          5%          10%
              -----                ----------   ----------------   -----   ----------   ----------   ----------
<S>                                <C>          <C>                <C>     <C>          <C>          <C>
Robert P. Goodman................      1,500           0.1%        $2.10    07/14/06      $  1,981     $  5,020
Thomas R. Berger.................    125,000          10.0%         2.10    09/14/06       165,085      418,357
                                     100,000           8.0%         2.10    12/23/06       138,068      334,686
                                      25,000           2.0%         2.10    06/05/06        33,017       83,671
Joseph J. Gonzalez...............    100,000           8.0%         2.10    01/07/06       132,068      334,686
                                      50,000           4.0%         2.10    09/14/06        66,034      167,343
</TABLE>
 
- ---------------
 
(1) All options were granted at an exercise price equal to the fair market value
    of CELCORE Common Stock on the date of grant as determined by the CELCORE
    Board of Directors.
 
(2) Potential gains are net of the exercise price but before taxes associated
    with the exercise. The 5% and 10% assumed annual rates of compounded stock
    appreciation are mandated by the rules of the Commission and do not
    represent CELCORE's estimate or projection of the future CELCORE Common
    Stock price. Actual gains, if any, on stock option exercises are dependent
    on the future financial performance of CELCORE, overall market conditions
    and the option holders' continued employment through the vesting period.
 
     The following table sets forth the number and value of unexercised CELCORE
Options held by the Named Executive Officers as of December 31, 1996. None of
the Named Executive Officers has exercised any of the CELCORE Options granted to
them.
 
                         FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                 NUMBER OF SECURITIES            VALUE OF UNEXERCISED
                                                UNDERLYING UNEXERCISED         IN-THE-MONEY OPTIONS AT
                                             OPTIONS AT DECEMBER 31, 1996        DECEMBER 31, 1996(1)
                                             ----------------------------    ----------------------------
                   NAME                      EXERCISABLE    UNEXERCISABLE    EXERCISABLE    UNEXERCISABLE
                   ----                      -----------    -------------    -----------    -------------
<S>                                          <C>            <C>              <C>            <C>
Robert P. Goodman..........................     2,000            7,500        $ 13,900       $   50,550
Thomas R. Berger...........................    62,500          437,500         461,875        2,860,625
Joseph J. Gonzalez.........................         0          150,000              --          885,000
</TABLE>
 
- ---------------
 
(1) There was no public trading market for CELCORE Common Stock at December 31,
    1996. Accordingly, these values have been calculated based on a price of
    $8.00 per share less the applicable exercise price. The valuation of CELCORE
    Options in this table does not reflect any change in the value of such
    options since such date as a consequence of the Merger.
 
                                       63
<PAGE>   70
 
                       PRINCIPAL STOCKHOLDERS OF CELCORE
 
     The following table sets forth certain information known to CELCORE
regarding the beneficial ownership of CELCORE as of October 30, 1997, by (i)
each person who is known by CELCORE to own beneficially more than 5% of any
class of the outstanding shares of CELCORE Capital Stock, (ii) each of CELCORE's
directors, (iii) each of CELCORE's Named Executive Officers, and (iv) all
directors and executive officers of CELCORE as a group.
<TABLE>
<CAPTION>
                                                                SHARES OF CELCORE PREFERRED STOCK
                                                              BENEFICIALLY OWNED PRIOR TO MERGER(2)
                                                        -------------------------------------------------
                                  SHARES OF CELCORE            SERIES A                  SERIES B
                                    COMMON STOCK            PREFERRED STOCK           PREFERRED STOCK
                                 BENEFICIALLY OWNED     -----------------------   -----------------------
                                 PRIOR TO MERGER(2)
                                ---------------------                PERCENT OF                PERCENT OF
       BENEFICIAL OWNER          NUMBER       PERCENT    NUMBER        CLASS       NUMBER        CLASS
       ----------------         ---------     -------   ---------    ----------   ---------    ----------
<S>                             <C>           <C>       <C>          <C>          <C>          <C>
PRINCIPAL STOCKHOLDERS:
Robert P. Goodman(1)(3).......  5,538,864(4)   63.55%   3,116,364(4)   69.25%            --         --
UCOM International Company
  Limited(1)(5)...............  2,004,227      26.38           --         --             --         --
Bessemer Venture Partners III
  L.P.(1)(6)..................  1,602,500      22.91      200,000       4.44      1,000,000      33.33%
Charles River Partnership
  VII(1)(7)...................  1,166,667      17.26           --         --      1,000,000      33.33
Williams Jones & Associates,
  Inc.(1)(8)..................  1,104,667(9)   16.49           --         --        938,000(9)   31.27
John Hatcher(1)(3)............    934,000      16.70           --         --             --         --
James Davis(1)(3).............    934,000      16.70           --         --             --         --
Tony Fletcher(1)(3)...........    934,000      16.70           --         --             --         --
Amerindo Investment
  Advisors(1)(10).............    500,000(11)   8.20           --         --             --         --
Henry Goldberg(12)............    492,545       8.14      454,545      10.10             --         --
21st Century Communications
  Partners L.P.(1)(13)........    333,334(14)   5.62           --         --             --         --
Amerindo Technology Growth
  Fund II(1)(10)..............    333,333       5.62           --         --             --         --
Citicorp Trustee Ltd.(15).....    330,000       5.57           --         --             --         --
Strome Partners(1)(16)........    250,000(17)   4.28           --         --             --         --
T. Rowe Price New Age Media
  Fund, Inc.(1)(18)...........    250,000       4.28           --         --             --         --
Dorothy Goodman(3)............    227,273       3.91      227,273       5.05             --         --
21st Century Communications
  L.P.(1)(13).................    226,010       3.88           --         --             --         --
Vereins Und Westbank(19)......    165,000       2.86           --         --             --         --
DIRECTORS:
Robert M. Flanagan(1).........    299,045(20)   5.11      254,545       5.66             --         --
Robert E. La Blanc(1).........    174,973(21)   3.03      170,473       3.79             --         --
G. Felda Hardymon(1)..........     44,388          *           --         --         25,000          *
OTHER NAMED EXECUTIVE
  OFFICERS:
Thomas R. Berger..............    187,500(22)   3.24           --         --             --         --
Joseph J. Gonzalez............     37,500(23)      *           --         --             --         --
Jay M. Rosen..................     22,500(24)      *           --         --             --         --
All executive officers and
  directors as a group (7
  persons)....................  6,304,770(25)  66.85    3,541,382      78.70%        25,000          *
 
<CAPTION>
                                       SHARES OF CELCORE PREFERRED STOCK
                                     BENEFICIALLY OWNED PRIOR TO MERGER(2)
                                -----------------------------------------------
                                       SERIES C                 SERIES D
                                   PREFERRED STOCK          PREFERRED STOCK
                                ----------------------   ----------------------    PERCENTAGE
                                                                                     OF ALL
                                            PERCENT OF               PERCENT OF      CELCORE
       BENEFICIAL OWNER         NUMBER        CLASS       NUMBER       CLASS      CAPITAL STOCK
       ----------------         -------     ----------   ---------   ----------   -------------
<S>                             <C>         <C>          <C>         <C>          <C>
PRINCIPAL STOCKHOLDERS:
Robert P. Goodman(1)(3).......      --           --             --       --           30.53%
UCOM International Company
  Limited(1)(5)...............      --           --      2,004,227      100%          11.05
Bessemer Venture Partners III
  L.P.(1)(6)..................  200,000        5.13%            --       --            8.84
Charles River Partnership
  VII(1)(7)...................  166,667        5.49             --       --            6.43
Williams Jones & Associates,
  Inc.(1)(8)..................  166,667(9)     5.49             --       --            6.09
John Hatcher(1)(3)............      --           --             --       --            5.15
James Davis(1)(3).............      --           --             --       --            5.15
Tony Fletcher(1)(3)...........      --           --             --       --            5.15
Amerindo Investment
  Advisors(1)(10).............  500,000(11)   16.46             --       --            2.76
Henry Goldberg(12)............      --           --             --       --            2.72
21st Century Communications
  Partners L.P.(1)(13)........  333,334(14)   10.97             --       --            1.84
Amerindo Technology Growth
  Fund II(1)(10)..............  333,333       10.97             --       --            1.84
Citicorp Trustee Ltd.(15).....  330,000       13.66             --       --            1.82
Strome Partners(1)(16)........  250,000(17)    8.23             --       --            1.38
T. Rowe Price New Age Media
  Fund, Inc.(1)(18)...........  250,000        8.23             --       --            1.38
Dorothy Goodman(3)............      --           --             --       --            1.25
21st Century Communications
  L.P.(1)(13).................  226,010        7.44             --       --            1.25
Vereins Und Westbank(19)......  165,000        5.43             --       --           *
DIRECTORS:
Robert M. Flanagan(1).........      --           --             --       --            1.65
Robert E. La Blanc(1).........      --           --             --       --           *
G. Felda Hardymon(1)..........   8,333            *             --       --           *
OTHER NAMED EXECUTIVE
  OFFICERS:
Thomas R. Berger..............      --           --             --       --            1.02
Joseph J. Gonzalez............      --           --             --       --           *
Jay M. Rosen..................      --           --             --       --           *
All executive officers and
  directors as a group (7
  persons)....................   8,333            *             --       --           34.27
</TABLE>
 
                                       64
<PAGE>   71
 
- ---------------
 
  *  Less than 1%.
 
 (1) Each has signed a voting agreement with respect to all of its shares of
     CELCORE Capital Stock. See "Voting Agreements."
 
 (2) Under the rules of the Commission, a person is deemed to be a beneficial
     owner of a security if such person has or shares the power to vote or
     direct the voting of such security or the power to dispose of or direct the
     disposition of such security. A person is also deemed to be a beneficial
     owner of a security if that person has the right to acquire beneficial
     ownership within 60 days. Accordingly, more than one person may be deemed
     to be a beneficial owner of the same securities. Unless otherwise indicated
     by footnote, the named individuals have sole voting and investment power
     with respect to the shares of CELCORE Common Stock beneficially owned.
     Includes CELCORE Common Stock and Series A Preferred Stock, Series B
     Preferred Stock, Series C Preferred Stock and Series D Preferred Stock as
     though converted into CELCORE Common Stock on a 1-for-1 basis as of October
     30, 1997.
 
 (3) The business address of Messrs. Goodman, Hatcher, Davis and Fletcher and
     Dorothy Goodman is 3800 Forest Hill-Irene Rd., Memphis, Tennessee 38125.
 
 (4) Includes 661,819 shares of Series A Preferred Stock (including 227,273
     shares of Series A Preferred Stock held by Dorothy Goodman) and 2,500
     shares of CELCORE Common Stock held by certain family members for which Mr.
     Goodman possesses powers of attorney with respect to voting and
     disposition, and 25,600 shares of CELCORE Common Stock held in trusts for
     the benefit of Mr. Goodman's children. Mr. Goodman disclaims beneficial
     ownership of all of the foregoing shares. Also includes 4,500 shares of
     CELCORE Common Stock subject to options exercisable within 60 days of
     October 30, 1997.
 
 (5) The business address of UCOM International Company Limited is 499 Moo 3
     Benchachinda Building, 12th Floor, Tower 13, Vibhavadi Rangsit Road,
     Chatuchak Bangkok, 10900.
 
 (6) The business address of Bessemer Venture Partnership III L.P. ("Bessemer")
     is 1025 Old Country Road, Suite 205, Westbury, New York, 11509. Includes
     44,388 shares of CELCORE Common Stock which may be deemed to be
     beneficially owned by Mr. Hardymon for which Bessemer possesses power of
     attorney with respect to voting and disposition.
 
 (7) The business address of Charles River Partnership VII is 10 Post Office
     Square, Suite 1330, Boston, Massachusetts, 02109.
 
 (8) The business address of Williams Jones & Associates, Inc. is 717 Fifth
     Avenue, New York, NY 10022.
 
 (9) Of the shares indicated above, 938,000 shares of Series B Preferred Stock
     are held through the Celcor Fund and 166,667 shares of Series C Preferred
     Stock are held through the Celcor Fund #2. Williams Jones & Associates,
     Inc. acts as the discretionary manager of both of the foregoing funds.
 
(10) The business address of Amerindo Investment Advisors ("Amerindo") and
     Amerindo Technology Growth Fund II is 399 Park Avenue, 18th Floor, New York
     City, New York 10022.
 
(11) Of the shares indicated above, 333,333 shares of Series C Preferred Stock
     are held by the Amerindo Technology Growth Fund II, 125,000 shares of
     Series C Preferred Stock are held by the Litton Industries, Inc. Master
     Trust and 41,667 shares of Series C Preferred Stock are held by Paul
     Marcus. Amerindo is the investment advisor of Litton Industries, Inc.
     Master Trust. The Amerindo Technology Growth Fund II is an affiliated
     investment advisor of Amerindo.
 
(12) The business address of Mr. Goldberg is 1229 19th Street, N.W., Washington,
     D.C. 20036.
 
(13) The business address of 21st Century Communications Partners L.P. and 21st
     Century Communications L.P. is 767 Fifth Avenue, New York City, New York
     10153.
 
(14) Of the shares indicated above, 226,010 shares of Series C Preferred Stock
     are held by 21st Century Communications L.P., 76,898 shares of Series C
     Preferred Stock are held by 21st Century Communications TELP and 30,426
     shares of Series C Preferred Stock are held by 21st Century Communications
     Foreign L.P. Sandler Investment Partners L.P. is the general partner of the
     foregoing funds.
 
                                       65
<PAGE>   72
 
(15) The business address of Citicorp Trustee Ltd. is 1410 N. Westshore Blvd.,
     4th Floor, Tampa, Florida 33607.
 
(16) The business address of Strome Partners is 100 Wilshire Boulevard, 15th
     Floor, Santa Monica, California 90401.
 
(17) Of the shares indicated above, Strome Partners L.P. and Strome Offshore
     Ltd. each hold 125,000 shares of Series C Preferred Stock. Strome Suskind
     Investment Management L.P. is the general partner of both funds.
 
(18) The business address of T. Rowe Price New Age Media Fund, Inc. is 100 East
     Pratt Street, Baltimore, Maryland 31202.
 
(19) The business address of Vereins Und Westbank is Alter Wall 12, 20457
     Hamburg, Germany.
 
(20) Includes 4,500 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997 and 254,545 shares of Series
     A Preferred Stock.
 
(21) Includes 4,500 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997.
 
(22) Includes 187,500 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997.
 
(23) Includes 37,500 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997.
 
(24) Includes 22,500 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997.
 
(25) Includes 261,000 shares of CELCORE Common Stock subject to options
     exercisable within 60 days of October 30, 1997.
 
                                       66
<PAGE>   73
 
                                DSC AND CELCORE
 
               UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS
 
     The following unaudited pro forma combined statements of operations combine
DSC's historical consolidated statements of operations and CELCORE's historical
results of operations for the nine-month period ended September 30, 1997 and for
the year ended December 31, 1996, giving effect to the Merger as if it had
occurred January 1, 1996. The unaudited pro forma combined balance sheet
combines DSC's historical consolidated balance sheet as of September 30, 1997
with CELCORE's historical balance sheet as of September 30, 1997, giving effect
to the Merger as if it had occurred on September 30, 1997. Of the total purchase
price, approximately $135 million represented the value of in-process research
and development. The excess of the purchase price of CELCORE (exclusive of the
amount allocated to in-process research and development) over the net
identifiable tangible and intangible assets and liabilities of CELCORE is
reported as Costs in Excess of Net Assets of Businesses Acquired, Net. The
carrying values of CELCORE's net assets are assumed to equal their fair values
for purposes of these unaudited pro forma financial statements, unless indicated
otherwise in the Notes to Unaudited Pro Forma Combined Financial Statements.
These values are subject to revision. However, management believes that any
resulting adjustments from purchase price allocation will not have a material
effect on the financial position or results of operations.
 
     The historical financial information of DSC has been derived from the
unaudited consolidated financial statements for the nine-month period ended
September 30, 1997 and the audited consolidated financial statements for the
year ended December 31, 1996 which are incorporated by reference and should be
read in conjunction with such financial information and the notes thereto. The
historical financial information of CELCORE has been derived from the unaudited
financial statements for the nine-month period ended September 30, 1997 and the
audited financial statements for the year ended December 31, 1996 which are
included elsewhere herein and should be read in conjunction with such financial
information and the notes thereto.
 
     The Unaudited Pro Forma Combined Balance Sheet and Unaudited Pro Forma
Combined Statements of Operations were prepared assuming the consummation of the
Merger, which is accounted for under the purchase method of accounting. The
unaudited pro forma adjustments are described in the accompanying notes. The
unaudited pro forma adjustments represent DSC's preliminary determination of the
necessary adjustments and are based upon certain assumptions DSC considers
reasonable under the circumstances. Final amounts may differ from those set
forth in the unaudited pro forma combined financial statements.
 
     The unaudited pro forma financial information presented herein may not be
indicative of the results of operations as they would have been if DSC and
CELCORE had been a single entity during 1996 and the nine months ended September
30, 1997, nor is it necessarily indicative of the results of operations which
may occur in the future. Anticipated efficiencies from the consolidation of DSC
and CELCORE are not fully determinable and have been excluded from the amounts
included in the pro forma amounts presented herein.
 
                                       67
<PAGE>   74
 
                                DSC AND CELCORE
 
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                               NINE MONTHS ENDED SEPTEMBER 30, 1997 (UNAUDITED)
                                             ----------------------------------------------------
                                                DSC        CELCORE     ADJUSTMENTS      COMBINED
                                             ----------   ----------   -----------     ----------
<S>                                          <C>          <C>          <C>             <C>
Revenue....................................  $1,130,374   $    9,485   $       --      $1,139,859
Cost of revenue............................     661,417        5,719           --         667,136
                                             ----------   ----------   ----------      ----------
  Gross profit.............................     468,957        3,766           --         472,723
                                             ----------   ----------   ----------      ----------
 
Operating costs and expenses:
  Research and product development.........     181,852        6,932           --         188,784
  Selling, general and administrative......     172,585        9,187           --         181,772
  Other operating costs....................       7,709           --        2,344(e)       10,053
                                             ----------   ----------   ----------      ----------
     Total operating costs and expenses....     362,146       16,119        2,344         380,609
                                             ----------   ----------   ----------      ----------
 
  Operating income (loss)..................     106,811      (12,353)      (2,344)         92,114
 
Interest income............................      16,840          249           --          17,089
Interest expense...........................     (19,334)        (173)          --         (19,507)
Other income (expense), net................      34,014         (101)          --          33,913
                                             ----------   ----------   ----------      ----------
     Income (loss) before income taxes.....     138,331      (12,378)      (2,344)        123,609
Income taxes...............................      51,898           --           --          51,898
                                             ----------   ----------   ----------      ----------
     Net income (loss).....................  $   86,433   $  (12,378)  $   (2,344)     $   71,711
                                             ==========   ==========   ==========      ==========
     Income (loss) per share...............  $     0.73   $    (2.26)                  $     0.57
                                             ==========   ==========                   ==========
 
Average shares used in per share
  computation..............................     119,169        5,533                      125,498
</TABLE>
 
See the accompanying Notes to Unaudited Pro Forma Combined Financial Statements.
 
                                       68
<PAGE>   75
 
                                DSC AND CELCORE
 
              UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                   YEAR ENDED DECEMBER 31, 1996 (UNAUDITED)
                                             ----------------------------------------------------
                                                DSC        CELCORE     ADJUSTMENTS      COMBINED
                                             ----------   ----------   -----------     ----------
<S>                                          <C>          <C>          <C>             <C>
Revenue....................................  $1,380,891   $    3,680   $       --      $1,384,571
Cost of revenue:
  Special charges related to inventories
     and associated assets.................      82,500           --           --          82,500
  Other....................................     843,247        1,351           --         844,598
                                             ----------   ----------   ----------      ----------
                                                925,747        1,351           --         927,098
                                             ----------   ----------   ----------      ----------
  Gross profit.............................     455,144        2,329           --         457,473
                                             ----------   ----------   ----------      ----------
 
Operating costs and expenses:
  Research and product development.........     210,091        6,700           --         216,791
  Selling, general and administrative......     233,576       10,768           --         244,344
  Special charges for excess facilities and
     equipment.............................      13,500           --           --          13,500
  Other operating costs....................      10,020           --        3,125(e)       13,145
                                             ----------   ----------   ----------      ----------
     Total operating costs and expenses....     467,187       17,468        3,125         487,780
                                             ----------   ----------   ----------      ----------
 
  Operating loss...........................     (12,043)     (15,139)      (3,125)        (30,307)
 
Interest income............................      24,146          605           --          24,751
Interest expense...........................     (26,355)         (71)          --         (26,426)
Other income (expense), net................       2,066          (26)          --           2,040
                                             ----------   ----------   ----------      ----------
     Loss before income taxes..............     (12,186)     (14,631)      (3,125)        (29,942)
Income taxes...............................      (4,631)          --           --          (4,631)
                                             ----------   ----------   ----------      ----------
     Net loss..............................  $   (7,555)  $  (14,631)  $   (3,125)     $  (25,311)
                                             ==========   ==========   ==========      ==========
     Loss per share........................  $    (0.06)  $    (2.69)                  $    (0.21)
                                             ==========   ==========                   ==========
 
Average shares used in per share
  computation..............................     116,514        5,502                      122,317
</TABLE>
 
See the accompanying Notes to Unaudited Pro Forma Combined Financial Statements.
 
                                       69
<PAGE>   76
 
                                DSC AND CELCORE
 
                   UNAUDITED PRO FORMA COMBINED BALANCE SHEET
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                 SEPTEMBER 30, 1997 (UNAUDITED)
                                                      ----------------------------------------------------
                                                         DSC        CELCORE     ADJUSTMENTS      COMBINED
                                                      ----------   ----------   -----------     ----------
<S>                                                   <C>          <C>          <C>             <C>
                       ASSETS
CURRENT ASSETS
  Cash and cash equivalents.........................  $  409,341   $      619   $   (2,836)(d)  $  407,124
  Marketable securities.............................     268,768           --           --         268,768
  Receivables.......................................     406,174        4,769           --         410,943
  Inventories.......................................     370,338        5,629           --         375,967
  Deferred income taxes.............................      60,429           --           --          60,429
  Other current assets..............................      72,911          818           --          73,729
                                                      ----------   ----------   ----------      ----------
 
          Total current assets......................   1,587,961       11,835       (2,836)      1,596,960
                                                      ----------   ----------   ----------      ----------
 
PROPERTY AND EQUIPMENT, NET.........................     443,664        5,017           --         448,681
 
LONG-TERM RECEIVABLES...............................      46,321          639           --          46,960
CAPITALIZED SOFTWARE DEVELOPMENT COSTS..............      66,900           --           --          66,900
COST IN EXCESS OF NET ASSETS OF BUSINESSES ACQUIRED,
  NET...............................................     141,906           --       19,504(b)      161,410
OTHER ASSETS........................................     119,404          481        9,000(b)      128,885
                                                      ----------   ----------   ----------      ----------
 
          Total assets..............................  $2,406,156   $   17,972   $   25,668      $2,449,796
                                                      ==========   ==========   ==========      ==========
 
   LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
 
CURRENT LIABILITIES
  Short-term debt...................................  $      126   $      450   $     (450)(d)  $      126
  Accounts payable..................................     116,911        4,841           --         121,752
  Accrued liabilities...............................     264,449        3,058       12,665(c)      280,172
  Income taxes payable..............................      30,558           --           --          30,558
  Current portion of long-term debt.................      32,497        2,386       (2,386)(d)      32,497
                                                      ----------   ----------   ----------      ----------
          Total current liabilities.................     444,541       10,735        9,829         465,105
                                                      ----------   ----------   ----------      ----------
 
LONG-TERM DEBT......................................     632,825           --           --         632,825
NONCURRENT LIABILITIES..............................      84,528           --           --          84,528
 
REDEEMABLE PREFERRED STOCK..........................          --       39,439      (39,439)(a)          --
 
SHAREHOLDERS' EQUITY (DEFICIT)
  Preferred stock...................................          --          450         (450)(a)          --
  Common stock......................................       1,229          559         (501)(a)       1,287
  Additional capital................................     748,330           --      158,018(a)      906,348
  Unrealized gains on securities, net of income
     taxes..........................................         265           --           --             265
  Accumulated translation adjustment................         930           --           --             930
  Retained earnings (deficit).......................     536,619      (33,211)    (101,789)(a)     401,619
                                                      ----------   ----------   ----------      ----------
                                                       1,287,373      (32,202)      55,278       1,310,449
 
Treasury stock......................................     (43,111)          --           --         (43,111)
                                                      ----------   ----------   ----------      ----------
 
          Total shareholders' equity (deficit)......   1,244,262      (32,202)      55,278       1,267,338
                                                      ----------   ----------   ----------      ----------
 
          Total liabilities and shareholders'
            equity..................................  $2,406,156   $   17,972   $   25,668      $2,449,796
                                                      ==========   ==========   ==========      ==========
</TABLE>
 
See the accompanying Notes to Unaudited Pro Forma Combined Financial Statements.
 
                                       70
<PAGE>   77
 
                          NOTES TO UNAUDITED PRO FORMA
                         COMBINED FINANCIAL STATEMENTS
 
NOTE 1: BASIS OF PRESENTATION
 
     The unaudited pro forma combined statements of operations for all periods
presented and the pro forma combined balance sheet at September 30, 1997 of DSC
and CELCORE have been prepared based upon the purchase method of accounting.
 
NOTE 2: PURCHASE PRICE OF CELCORE
 
     The estimated purchase price of the Merger is approximately $167.2 million,
including transaction costs and other Merger related costs of approximately $6.5
million. The preliminary purchase price includes the conversion of all of the
outstanding CELCORE Capital Stock into approximately 5.8 million shares of DSC
Common Stock at an estimated value of $145 million using an assumed Exchange
Ratio of .32 and the valuation of the CELCORE Options assumed by DSC and the
Notes of $15.7 million.
 
NOTE 3: PRO FORMA ADJUSTMENTS
 
     Adjustments included in the unaudited pro forma combined financial
statements are as follows:
 
     (a) Reflects the elimination of CELCORE Capital Stock, additional paid-in
         capital and accumulated deficit and the projected issuance of 5.8
         million shares of DSC Common Stock using an assumed Exchange Ratio of
         .32. Also reflects the write-off of in-process research and
         development, as discussed in Note 4. This charge has been excluded from
         the unaudited pro forma statements of operations as it was considered a
         non-recurring charge.
 
     (b) Reflects the remaining excess of the purchase price of CELCORE over its
         net book value. See Note 4.
 
     (c) Reflects DSC's estimate of transaction costs and other related Merger
         costs.
 
     (d) CELCORE and a Subsidiary of DSC entered into a revolving credit
         agreement under which CELCORE can borrow up to $10 million for working
         capital purposes. For purposes of calculating the pro forma
         adjustments, all of CELCORE's short term borrowings were eliminated
         with a corresponding reduction in cash and cash equivalents. The impact
         on net financing costs was minimal.
 
     (e) Reflects amortization expense for Acquired Technology and Costs in
         Excess of Net Assets of Businesses Acquired, Net.
 
NOTE 4: IN-PROCESS RESEARCH AND DEVELOPMENT
 
     A preliminary estimate of the intangible assets acquired aggregated
approximately $163.5 million. DSC received a preliminary appraisal of the
intangible assets which indicates that approximately $135 million of the
acquired intangible assets consists of in-process research and development.
Because there can be no assurance that DSC will be able to successfully complete
the development and integration of CELCORE's products or that the acquired
technology has any alternative future use, the acquired in-process research and
development will be charged to expense by DSC in the quarter in which the Merger
is consummated. The remaining intangible assets of $28.5 million were assigned
to Acquired Technology and Costs in Excess of Net Assets of Businesses Acquired,
Net and will be amortized on a straight-line basis over its estimated useful
lives. Management believes that the unamortized balance is recoverable through
future operating results. These estimates could change as the estimates of the
fair value of assets acquired and liabilities assumed are finalized and the
appraisal of in-process research and development is completed.
 
                                       71
<PAGE>   78
 
NOTE 5: PRO FORMA NET INCOME (LOSS) PER SHARE
 
     The pro forma combined net income (loss) per share is based on the combined
weighted average number of common and dilutive equivalent shares outstanding of
DSC and the 5.8 million shares of DSC Common Stock expected to be issued to
CELCORE shareholders upon the Merger using the assumed Exchange Ratio of .32.
This ratio is subject to change depending on the Average Trading Price. Common
equivalent shares are excluded from the computation when the effect is
antidilutive. The consolidated net income (loss) per share has been adjusted to
exclude the accretion on CELCORE Preferred Stock which will be exchanged for DSC
Common Stock in the Merger.
 
                                       72
<PAGE>   79
 
      DESCRIPTION OF CAPITAL STOCK AND COMPARISON OF STOCKHOLDERS' RIGHTS
 
     Upon consummation of the Merger, stockholders of CELCORE will become
stockholders of DSC. The rights of former CELCORE stockholders will continue to
be governed by the DGCL and will be governed by the Certificate of Incorporation
and Bylaws, each as amended, of DSC (the "DSC Certificate" and the "DSC Bylaws,"
respectively). The following is a summary of the material differences between
the DSC Certificate and the DSC Bylaws, on the one hand, and the Certificate of
Incorporation and Bylaws of CELCORE (the "CELCORE Certificate" and the "CELCORE
Bylaws," respectively), on the other hand, that may affect the rights of
CELCORE's stockholders who become holders of DSC Common Stock. The following
summary does not purport to be a complete statement of the rights of holders of
DSC Common Stock and CELCORE Capital Stock, and is qualified in its entirety by
reference to the DGCL, the DSC Certificate and DSC Bylaws (each of which is
incorporated by reference in this Prospectus/Proxy Statement), and the CELCORE
Certificate and CELCORE Bylaws.
 
CAPITAL STOCK
 
     CELCORE. The authorized capital stock of CELCORE consists of 50,000,000
shares of CELCORE Common Stock and 14,000,000 shares of CELCORE Preferred Stock,
consisting of 4,500,000 shares of Series A Preferred Stock, 3,000,000 shares of
Series B Preferred Stock, 4,000,000 shares of Series C Preferred Stock and
2,500,000 shares of Series D Preferred Stock. The Board of Directors of CELCORE
is authorized, without further stockholder action, to issue shares of CELCORE
Preferred Stock in one or more series, and to fix the rights, preferences,
privileges and restrictions thereof, including dividend rates, conversion
rights, voting rights, terms of redemption, redemption prices, amounts payable
upon liquidation and the number of shares constituting any series or the
designation of such series. The CELCORE Preferred Stock ranks senior to CELCORE
Common Stock with respect to rights to receive dividends and to participate in
distributions or payments in the event of any liquidation, dissolution or
winding up of CELCORE. See "-- CELCORE Preferred Stock." Since its inception in
1992, CELCORE has issued and sold, and there are outstanding, 4,500,000 shares
of Series A Preferred Stock, 3,000,0000 shares of Series B Preferred Stock,
3,038,046 shares of Series C Preferred Stock and 2,004,227 shares of Series D
Preferred Stock. All shares of CELCORE Common Stock are identical and have one
vote per share.
 
     DSC. The authorized capital stock of DSC consists of 500,000,000 shares of
DSC Common Stock and 5,000,000 shares of Preferred Stock (as defined in the DSC
Certificate), par value $1.00. No shares of Preferred Stock of DSC are currently
outstanding. All shares of DSC Common Stock have identical rights and have one
vote per share.
 
CELCORE PREFERRED STOCK
 
     The outstanding series of CELCORE Preferred Stock have certain redemption
rights, dividend entitlements, liquidation preferences, and conversion options
which are not applicable to DSC Common Stock. As of the Effective Time, holders
of CELCORE Preferred Stock will no longer be entitled to certain rights and
privileges previously provided for in the CELCORE Certificate and CELCORE's
Certificates of Designations. Such rights include (i) a dividend preference,
(ii) a liquidation preference, (iii) certain redemption rights, (iv) certain
anti-dilution adjustments upon dilutive issuances of CELCORE Capital Stock, and
(v) with respect to the Series B Preferred Stock, the Series C Preferred Stock
and the Series D Preferred Stock, the right to vote as a separate class (with a
60% approval requirement) concerning certain corporate transactions. Certain
terms of the outstanding CELCORE Preferred Stock are summarized below.
 
     Dividends. Holders of Series B Preferred Stock, Series C Preferred Stock
and Series D Preferred Stock are entitled to dividend preferences with respect
to any dividends, when, as, and if declared by the CELCORE Board, at annual
rates of (i) $0.16 per share with respect to shares of Series B Preferred Stock,
(ii) $0.48 per share with respect to Series C Preferred Stock and (iii) $0.64
per share with respect to Series D Preferred Stock. All dividends are
cumulative. CELCORE may not pay cash dividends on CELCORE Common Stock or Series
A Preferred Stock while there are any declared but unpaid cash dividends on any
shares of Series B Preferred Stock, Series C Preferred Stock or Series D
Preferred Stock outstanding.
 
                                       73
<PAGE>   80
 
     Liquidation. In the event of any liquidation, dissolution or winding up of
CELCORE (which, as defined in the CELCORE Certificate, would include the
Merger), holders of the Series B Preferred Stock, Series C Preferred Stock and
Series D Preferred Stock are entitled to receive, prior and in preference to any
distribution of any assets of CELCORE to the holders of CELCORE Common Stock or
Series A Preferred Stock, $2.00, $6.00 and $8.00 per share, respectively, plus
all accrued and unpaid dividends. After holders of Series B Preferred Stock,
Series C Preferred Stock and Series D Preferred Stock have received the full
amount of their liquidation preferences, the holders of Series A Preferred Stock
will be entitled to receive prior and in preference to any distribution of any
assets of CELCORE to the holders of CELCORE Common Stock, $0.50 per share, plus
all accrued and unpaid dividends. After the holders of CELCORE Preferred Stock
have received the full amount of their liquidation preference, the holders of
CELCORE Common Stock will be entitled to receive all remaining assets of CELCORE
available for distribution, pro rata, based on the number of shares of CELCORE
Common Stock held by each.
 
     Conversion. Each share of CELCORE Preferred Stock is presently convertible
into one share of CELCORE Common Stock, subject to future adjustment based on
any future subdivisions, dividends or distributions, reclassifications and
diluting issues. The current conversion prices for the Series A Preferred Stock,
Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock
are $0.50, $2.00, $6.00 and $8.00 per share, respectively.
 
     Voting Rights. In any case where the holders of Series A Preferred Stock,
Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock
are entitled to vote together as one class upon any matter submitted to the
stockholders for a vote: (i) each share of CELCORE Common Stock issued and
outstanding has one vote; and (ii) each holder of CELCORE Preferred Stock has a
number of votes equal to the number of full shares of CELCORE Common Stock into
which such CELCORE Preferred Stock is then convertible.
 
     Certain Protective Provisions. In addition to any vote required by
applicable law or the CELCORE Certificate, and for so long as any shares of
Series B Preferred Stock, Series C Preferred Stock or Series D Preferred Stock
remain outstanding, no amendment of the CELCORE Certificate materially adversely
affecting the voting, dividend, liquidation, or conversion rights, preferences
or privileges, of any such series of CELCORE Preferred Stock shall be valid or
effective without the previous affirmative vote of the record holders of a
majority of such series of CELCORE Preferred Stock, voting separately as a
class. In addition to any other rights provided by law or agreement, so long as
any shares of Series B Preferred Stock, Series C Preferred Stock or Series D
Preferred Stock are outstanding, CELCORE may not without first obtaining the
affirmative vote or written consent of the holders of 60% of the outstanding
shares of each such series: (i) amend the CELCORE Certificate or the CELCORE
Bylaws to change the number of directors or to amend the provisions relating to
the election of directors; (ii) authorize or issue any additional class or
series of capital stock having liquidation, dividend or redemption preferences
greater than such series of CELCORE Preferred Stock; or (iii) engage in any
consolidation or merger of CELCORE with or into any other entity, or sell all,
or substantially all, of its assets.
 
     Redemption. CELCORE must redeem one third of the outstanding shares of
Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock
on each of December 1, 2000, December 1, 2001 and December 1, 2002 at a price of
$2.00, $6.00 and $8.00 per share, respectively, subject to adjustment.
 
     Election of Directors. Until consummation of an initial public offering of
CELCORE, the holders of the Series B Preferred Stock, voting separately as a
class, will be entitled to elect one director of CELCORE. The four remaining
directors will be elected by the holders of CELCORE Common Stock and CELCORE
Preferred Stock (other than the Series B Preferred Stock) voting together as a
single class.
 
SPECIAL MEETINGS OF STOCKHOLDERS
 
     Under the DGCL, a special meeting of stockholders may be called by the
board of directors or by any other person authorized to do so in the certificate
of incorporation or the bylaws.
 
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<PAGE>   81
 
     The CELCORE Bylaws contain provisions concerning special meetings
consistent with the provisions of the DGCL described above. The DSC Bylaws
contain provisions concerning special meetings consistent with the provisions of
the DGCL described above, and also empower the chairman of the board to call a
special meeting.
 
NUMBER OF DIRECTORS
 
     Under the DGCL, the minimum number of directors is one. The DGCL permits
the board of directors alone to change the authorized number or the range of
directors by amendment to the bylaws, unless the directors are not authorized in
the certificate of incorporation to amend the bylaws or the number of directors
is fixed in the certificate of incorporation, in which cases a change in the
number of directors may be made only upon approval of such change by the
stockholders.
 
     The CELCORE Bylaws provide that the number of directors shall be determined
from time to time by resolution of the stockholders or directors. The number of
persons constituting the Board of Directors of CELCORE has been fixed at five.
The DSC Certificate and the DSC Bylaws also provide for a variable number of
directors between 7 and 15. The DSC Board of Directors currently consists of
seven members.
 
CLASSIFICATION OF BOARD
 
     A classified board is one in which a certain number of the directors are
elected on a rotating basis each year. This method of electing directors makes
changes in the composition of the board of directors, and thus a potential
change in control of a corporation, a lengthier and more difficult process. The
DGCL permits, but does not require, a classified board of directors, with
staggered terms under which one-half or one-third of the directors are elected
for terms of two or three years, respectively.
 
     CELCORE does not have a classified board of directors. The DSC Certificate
divides the DSC board of directors into three classes serving staggered
three-year terms with each class to consist as nearly as possible of one-third
of the directors; provided, that once elected, no director's term shall be
reduced.
 
REMOVAL OF DIRECTORS
 
     Under the DGCL, a director of a corporation that does not have a classified
board of directors may be removed with or without cause with the approval of a
majority of the outstanding shares entitled to vote at an election of directors,
and a director of a corporation that has a classified board of directors may be
removed only for cause unless the corporation's certificate of incorporation
provides otherwise.
 
     The CELCORE Bylaws provide that a director may be removed with or without
cause by CELCORE's stockholders and for cause by the board of directors. The DSC
Bylaws provide that a director may be removed only for cause by affirmative vote
of the holders of stock having more than 50% of the voting power of all voting
stock then outstanding.
 
ANTI-TAKEOVER PROVISIONS; RESTRICTIONS ON CERTAIN BUSINESS COMBINATIONS
 
     CELCORE. CELCORE has elected to be subject to Section 203 of the DGCL
("Section 203"). Under Section 203, certain transactions and business
combinations between a corporation and an "interested stockholder" which owns
15% or more of the corporation's outstanding voting stock, are restricted for a
period of three years from the date the stockholder becomes an interested
stockholder. Generally, Section 203 prohibits significant business transactions
by CELCORE such as a merger with, disposition of assets to, or receipt of
disproportionate financial benefits by, any interested stockholder, or any other
transaction that would increase such interested stockholder's proportionate
ownership of any class or series of CELCORE's capital stock, unless: (i) the
transaction resulting in a person's becoming an interested stockholder, or the
business combination, has been approved by the Board of Directors of CELCORE
before the person becomes an interested stockholder; (ii) the interested
stockholder acquires 85% or more of the outstanding voting stock of CELCORE in
the same transaction that makes it an interested stockholder; or (iii) on or
after the date the person becomes an interested stockholder, the business
combination is approved by the Board of Directors of
 
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<PAGE>   82
 
CELCORE or by the holders of at least two-thirds of CELCORE's outstanding voting
stock at an annual or special meeting, excluding shares owned by the interested
stockholder.
 
     DSC. On April 25, 1996, DSC's Board of Directors declared a dividend of one
Preferred Stock Purchase Right for each outstanding share of DSC Common Stock.
The dividend was payable on May 22, 1996 to the stockholders of record on that
date. Each Preferred Stock Purchase Right entitles the registered holder to
purchase from DSC one one-thousandth of a share of Series B Junior Participating
Preferred Stock, par value $1.00 per share of DSC at a price of $175.00 per one
one-thousandth of a share of Preferred Stock, subject to adjustment. The
Preferred Stock Purchase Rights set forth in the DSC Rights Agreement are
described on DSC's Registration Statement Form 8-A dated May 13, 1996, which is
incorporated by reference in this Prospectus/Proxy Statement. DSC has not
elected to be subject to Section 203, but the DSC Certificate provides that any
merger or consolidation of DSC with or into any other corporation, or any sale,
lease, exchange or other disposition of all or substantially all of the assets
of DSC to another corporation, person or entity requires the affirmative vote of
the holders of at least three-fourths of the outstanding shares of DSC capital
stock if, as of the record date for the determination of stockholders entitled
to notice thereof and to vote thereon, such other corporation, person or entity
is the beneficial owner, directly or indirectly, of 5% or more of the
outstanding shares of DSC capital stock. A corporation, person or other entity
will be deemed to be the beneficial owner of any shares of DSC capital stock (i)
which it has the right to acquire pursuant to any agreement, or upon exercise of
conversion rights, warrants or options, or otherwise, or (ii) which are
beneficially owned, directly or indirectly by any other corporation, person, or
other entity (a) with which it or its "affiliate" or "associate" (as referenced
below) has any agreement, arrangement or understanding for the purpose of
acquiring, holding, voting or disposing of capital stock of DSC or (b) which is
its "affiliate" or "associate" as those terms are defined in Rule 12b-2 of the
Exchange Act. This provision may not be amended or rescinded except by the
affirmative vote of the holders of at least three-fourths of the outstanding
shares of DSC capital stock.
 
INDEMNIFICATION
 
     Section 145 of the DGCL ("Section 145") provides generally that a Delaware
corporation may indemnify its directors and officers against expenses,
judgments, fines and settlements actually and reasonably incurred by them in
connection with any civil, criminal, administrative, or investigative suit or
action except actions by or in the right of the corporation if, in connection
with the matters in issue, they acted in good faith and in a manner they
reasonably believed to be in or not opposed to the best interests of the
corporation, and in connection with any criminal suit or proceeding, if in
connection with the matters in issue, they had no reasonable cause to believe
their conduct was unlawful. Section 145 further provides that in connection with
the defense or settlement of any action by or in the right of the corporation, a
Delaware corporation may indemnify its directors and officers against expenses
actually and reasonably incurred by them if, in connection with the matters in
issue, they acted in good faith, in a manner they reasonably believed to be in
or not opposed to the best interests of the corporation, except that no
indemnification may be made with respect to any claim, issue or matter as to
which such person has been adjudged liable for negligence or misconduct unless
the Court of Chancery or the court in which such action or suit is brought
approves such indemnification. Section 145 further permits a Delaware
corporation to grant its directors and officers additional rights of
indemnification through bylaw provisions and otherwise, and to purchase
indemnity insurance on behalf of its directors and officers.
 
     CELCORE. Article Nine of the CELCORE Certificate and Article Eight of the
CELCORE Bylaws provide, in general, that CELCORE must indemnify its directors
and officers to the fullest extent permitted by the DGCL. Article Eight of the
CELCORE Bylaws further allows CELCORE to purchase and maintain insurance on
behalf of its directors, officers, employers or agents.
 
     DSC. Article Eight of the DSC Bylaws provides, in general, that DSC must
indemnify its directors and officers to the fullest extent authorized by the
DGCL, as the same exists or may hereafter be amended (but, in the case of any
such amendment, only to the extent that such amendment permits DSC to provide
broader indemnification rights than said law permitted DSC to provide prior to
such amendment), against all expense, liability and loss reasonably incurred or
suffered by such person in connection therewith. Such right to
 
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<PAGE>   83
 
indemnification includes the right to have DSC pay the expenses incurred in
defending any such proceeding in advance of its final disposition, subject to
the provisions of the DGCL. The DSC Certificate and DSC Bylaws also authorize
DSC to maintain insurance and to grant similar indemnification rights to
employees or agents of DSC. The directors and officers of DSC are covered by
insurance policies indemnifying against certain liabilities, including certain
liabilities arising under the Securities Act, which might be incurred by them in
such capacities. DSC has purchased and currently has in force directors' and
officers' liability insurance policies which cover certain liabilities of
directors and officers arising out of claims based on certain acts or omissions
by them in their capacity as directors or officers. DSC has entered into
indemnification agreements with certain of its directors and executive officers.
Each of these agreements, among other things, contractually obligates DSC to,
under certain circumstances, indemnify the officer or director against certain
expenses and liabilities arising out of legal proceedings which may be brought
against such officer or director by reason of his status or service as a
director or officer. In addition, in a related trust agreement (the "Trust
Agreement"), DSC has provided $1 million to be held in trust by a third-party
trustee to be used to satisfy DSC's obligations pursuant to the indemnification
agreements which have been executed and any similar agreements which may be
executed in the future. The Trust Agreement further provides that DSC's Board of
Directors may, in its discretion, provide up to an additional $1 million to the
trustee.
 
LIMITATION OF MONETARY LIABILITIES
 
     CELCORE. The CELCORE Certificate provides that, to the fullest extent
permitted by the DGCL, no director shall be liable to CELCORE or its
stockholders for monetary damages for breach of fiduciary duty as a director. By
virtue of these provisions, a director of CELCORE is not personally liable for
monetary damages for a breach of such director's fiduciary duty except for
liability for (i) breach of the duty of loyalty to CELCORE or to its
stockholders, (ii) acts or omissions not in good faith or that involve
intentional misconduct or a knowing violation of law, (iii) dividends or stock
repurchases or redemptions that are unlawful under the DGCL, and (iv) any
transaction from which such director receives an improper personal benefit. In
addition, the CELCORE Certificate provides that if the DGCL is amended to
authorize the further elimination or limitation of the liability of a director,
then the liability of the directors will be eliminated or limited to the fullest
extent permitted by the DGCL, as amended.
 
     DSC. The DSC Certificate and DSC Bylaws provide that a director of DSC will
not be personally liable to DSC or its stockholders for monetary damages for
breach of fiduciary duty as a director, except, if required by the DGCL as
amended from time to time, for liability (i) for any breach of the director's
duty of loyalty to DSC or its stockholders, (ii) for acts or omissions not in
good faith or which involve intentional misconduct or a knowing violation of
law, (iii) under Section 174 of the DGCL, which concerns unlawful payments of
dividends, stock purchases or redemptions or (iv) for any transaction from which
the director derived an improper personal benefit. Neither the amendment nor
repeal of such provision will eliminate or reduce the effect of such provision
in respect of any matter occurring, or any cause of action, suit or claim that,
but for such provision, would accrue or arise prior to such amendment or repeal.
 
PREEMPTIVE RIGHTS
 
     Unless the certificate of incorporation provides otherwise, the
stockholders of a Delaware corporation do not have preemptive rights. Neither
the DSC Certificate nor the CELCORE Certificate provides for any preemptive
rights.
 
PAYMENT OF DIVIDENDS
 
     The holders of CELCORE Common Stock are entitled to receive ratably such
dividends, if any, as may be declared by the Board of Directors out of funds
legally available therefor. In the event of a voluntary or involuntary
liquidation, dissolution or winding up of CELCORE, the holders of CELCORE Common
Stock are entitled to share ratably in all assets remaining after payment of
liabilities and liquidation preferences of any outstanding shares of CELCORE
Preferred Stock. See "-- CELCORE Preferred Stock." Neither DSC nor CELCORE has
paid any cash dividends on their respective capital stock since their respective
inceptions.
 
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<PAGE>   84
 
Following the Merger, DSC intends to retain any future earnings for use in its
business and does not anticipate paying cash dividends in the foreseeable
future.
 
ADVANCE NOTICE REQUIREMENTS FOR STOCKHOLDER PROPOSALS AND NOMINATIONS
 
     For proposals or director nominations that a DSC stockholder desires to
present at the annual meeting of stockholders, the DSC Bylaws require advance
notice by such DSC stockholder, delivered to DSC's Secretary between 70 and 90
days prior to the first anniversary of the preceding year's annual meeting,
except that, in the event that the date of the annual meeting is advanced by
more than 20 days or delayed by more than 70 days from such anniversary date,
notice by the stockholder must be delivered not earlier than the ninetieth day
prior to such annual meeting and not later than the close of business on the
later of the seventieth day prior to such annual meeting or the tenth day
following the day on which public announcement of the date of such meeting is
first made. Only a person who was nominated in accordance with the notice
procedures will be eligible to serve as a director of DSC, and the only business
that may be conducted at a meeting of stockholders is that which was brought
before the meeting in accordance with the notice procedures. The chairman of the
meeting will determine whether a nomination or any business proposed to be
brought before any meeting was made in accordance with the notice procedures
and, if any proposed nomination or business is not in compliance with such
procedures, to declare that such defective proposal or nomination will be
disregarded. The CELCORE Bylaws do not require advance notice of proposals or
director nominations intended to be presented by a CELCORE stockholder at an
annual meeting.
 
RIGHTS OF DISSENTING STOCKHOLDERS
 
     Holders of record of shares of CELCORE Capital Stock who follow the
appropriate procedures will be entitled to appraisal rights under Section 262 of
the DGCL ("Section 262") in connection with the Merger. The following summary of
the provisions of Section 262 is not intended to be a complete statement of such
provisions and is qualified in its entirety by reference to the full text of
Section 262, a copy of which is attached to this Prospectus/Proxy Statement as
Appendix C and incorporated herein by reference.
 
     Under Section 262, record holders of CELCORE Capital Stock who follow the
procedures set forth in Section 262 will be entitled to have their shares
appraised by the Delaware Court of Chancery (the "Court") and to receive payment
of the "fair value" of their shares as of the Effective Time, exclusive of any
element of value arising from the accomplishment or expectation of the Merger,
together with a fair rate of interest, as determined by the Court. However, no
holder of CELCORE Capital Stock who votes in favor of the Merger will be
entitled to exercise these rights.
 
     Under Section 262, where a merger agreement is to be submitted for approval
and adoption at a meeting of stockholders, as in the case of the Special
Meeting, not less than 20 days prior to the meeting, CELCORE must notify each of
its stockholders of record at the close of business on the Record Date that
appraisal rights are available and include in each such notice a copy of Section
262. THIS PROSPECTUS/PROXY STATEMENT IS BEING SENT BY PERSONAL DELIVERY OR BY
MAIL TO ALL HOLDERS OF RECORD OF SHARES OF CELCORE CAPITAL STOCK ON THE RECORD
DATE AND CONSTITUTES NOTICE OF THE APPRAISAL RIGHTS AVAILABLE TO SUCH HOLDERS
UNDER SECTION 262. Any stockholder who wishes to exercise appraisal rights
should review the following discussion and Appendix C carefully, because failure
to timely and properly comply with the procedures specified in Section 262 will
result in the loss of appraisal rights under the DGCL.
 
     A stockholder of CELCORE electing to exercise appraisal rights must, prior
to the vote concerning the Merger at the Special Meeting, perfect his, her or
its appraisal rights by demanding in writing from CELCORE the appraisal of his,
her or its shares of CELCORE Capital Stock. A vote against the Merger will not
constitute a demand for appraisal. A stockholder electing to take such action
must do so by a separate written demand as provided in Section 262. A holder who
elects to exercise appraisal rights should mail or deliver his, her or its
written demand to CELCORE at Attn: Corporate Secretary, 3800 Forest Hill-Irene
Road, Memphis, Tennessee, 38125, so as to be received before the vote on the
approval and adoption of the Merger Agreement at the Special Meeting. The demand
should specify the holder's name and mailing
 
                                       78
<PAGE>   85
 
address, the number of shares of CELCORE Capital Stock owned and that such
holder is demanding appraisal of his, her or its shares. Only a holder of record
of shares of CELCORE Capital Stock (or his, her or its duly appointed
representative) is entitled to assert appraisal rights for the shares registered
in that holder's name. A demand for appraisal should be executed by or on behalf
of the holder of record fully and correctly, as the holder's name appears on the
stock certificates.
 
     Within ten days after the Effective Time of the Merger, CELCORE must
provide notice of the Effective Time of the Merger to all stockholders who have
complied with Section 262 and have not voted in favor of approval and adoption
of the Merger Agreement and approval of the Merger. Within 120 days after the
Effective Time of the Merger, any stockholder who has made a valid written
demand and who has not voted in favor of approval and adoption of the Merger
Agreement and approval of the Merger may (i) file a petition in the Court
demanding a determination of the value of shares of CELCORE Capital Stock, and
(ii) upon written request, receive from CELCORE a statement setting forth the
aggregate number of shares of CELCORE Capital Stock not voted in favor of
approval and adoption of the Merger Agreement and approval of the Merger and
with respect to which demands for appraisal have been received and the aggregate
number of holders of such shares. Such statement must be mailed within ten days
after the written request therefor has been received by CELCORE.
 
     If a petition for an appraisal is timely filed, at a hearing on such
petition, the Court is required to determine the holders of Dissenting Shares
entitled to appraisal rights and to determine the "fair value" of the Dissenting
Shares exclusive of any element of value arising from the accomplishment or
expectation of the Merger, together with a fair rate of interest, if any, to be
paid upon the value of the Dissenting Shares. In determining such "fair value,"
the Court is required to take into account all relevant factors, including the
market value of CELCORE Capital Stock and the net asset and earnings value of
CELCORE, and in determining the fair value of interest, the Court may consider
the rate of interest which CELCORE would have had to pay to borrow money during
the pendency of the proceeding. Upon application by a stockholder, the Court may
also order that all or a portion of the expenses incurred by any stockholder in
connection with the appraisal proceeding, including, without limitation,
reasonable attorneys' fees and the fees and expenses of experts utilized in the
appraisal proceeding, be charged pro rata against the value of all the shares of
CELCORE Capital Stock entitled to appraisal.
 
     Any holder of Dissenting Shares who has duly demanded an appraisal under
Section 262 will not, after the Effective Time of the Merger, be entitled to
vote the shares subject to such demand for any purpose or be entitled to the
payment of dividends or other distributions on such Dissenting Shares (except
dividends or other distributions payable to stockholders of record as of a date
prior to the Effective Time of the Merger).
 
     If any holder of shares of CELCORE Capital Stock who demands appraisal
under Section 262 effectively withdraws or loses, his, her or its right to
appraisal, the shares of such holder will be converted into a right to receive
that number of shares of DSC Common Stock as is determined in accordance with
the Merger Agreement. A holder will effectively lose his, her or its right to
appraisal if he, she or it votes in favor of approval and adoption of the Merger
Agreement and approval of the Merger, or if no petition for appraisal is filed
within 120 days after the Effective Time of the Merger, or if the holder
delivers to CELCORE a written withdrawal of such holder's demand for an
appraisal and an acceptance of the Merger, except that any such attempt to
withdraw made more than 60 days after the Effective Time of the Merger requires
the written approval of CELCORE or its successor. A holder of stock represented
by certificates may also lose his, her or its right to appraisal if he, she or
it fails to comply with the Court's direction to submit such certificates of
stock to the Register in Chancery for notation thereon of the pendency of the
appraisal proceedings.
 
STOCKHOLDERS' LISTS AND INSPECTION OF BOOKS AND RECORDS
 
     Both the DSC Bylaws and the CELCORE Bylaws provide that any stockholder may
examine such corporation's list of stockholders for a period of at least 10 days
prior to any meeting of stockholders, if such examination is for any purpose
germane to the meeting. The list may also be inspected at the time and place of
the meeting by any stockholder who is present. Except as stated above and as
provided by applicable law, no stockholder of DSC or CELCORE has any additional
rights to inspect the corporation's books and records.
 
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<PAGE>   86
 
        PROPOSAL TO APPROVE THE PAYMENTS UNDER THE EMPLOYMENT AGREEMENTS
 
     At the Special Meeting, the stockholders of CELCORE will be asked to
approve the payments to Thomas R. Berger, James M. Foley and Joseph J. Gonzalez
under the Employment Agreements between each of those individuals and DSC. The
effectiveness of the Employment Agreements is contingent upon the consummation
of the Merger and the approval of the payments thereunder by the affirmative
vote of the holders of more than 75% of the outstanding shares of CELCORE
Capital Stock (excluding shares held by Messrs. Berger, Foley and Gonzalez and
certain of their related parties), voting together as a single class,
represented and entitled to vote at the Special Meeting or any adjournment
thereof. The approval of the payments under the Employment Agreements is not a
condition to consummation of the Merger.
 
BACKGROUND
 
     In connection with the Merger Agreement, DSC and each of Messrs. Berger,
Foley and Gonzalez agreed to enter into the Employment Agreements, which provide
annual compensation and bonuses as follows: Mr. Berger, $226,550 and $350,000;
Mr. Foley, $151,225 and $150,000; and Mr. Gonzalez, $148,925 and $150,000. The
bonuses under the Employment Agreements will be payable in two installments, the
first of which is due on the Closing Date (as defined in the Merger Agreement)
and the second of which is due on the second anniversary of the Closing Date, as
follows: Mr. Berger, $100,000 and $250,000; Mr. Foley, $50,000 and $100,000; and
Mr. Gonzalez, $50,000 and $100,000. Under the Employment Agreements, Messrs.
Berger, Foley and Gonzalez have agreed to forfeit and terminate the Canceled
Options representing that portion of the BFG Options that has not vested
immediately prior to the Effective Time pursuant to the terms of their Amended
Option Agreements. In consideration of the termination of the Canceled Options,
on the date of the Effective Time, DSC will execute and deliver to each of
Messrs. Berger, Foley and Gonzalez a promissory note, the principal balance of
which will be payable in two equal installments on the first and second
anniversary of the Effective Time by delivery of shares of DSC Common Stock on
each such date. The Employment Agreements also provide each of Messrs. Berger,
Foley and Gonzalez with options to purchase shares of DSC Common Stock and the
eligibility to receive performance-based bonus payments. Additionally, DSC has
agreed to assume the obligations of CELCORE under the Amended Option Agreements
with Messrs. Berger, Foley and Gonzalez. Pursuant to the Amended Option
Agreements, each of Messrs. Berger, Foley and Gonzalez agreed that the
consummation of the Merger would not result in the full and immediate
exercisability of all BFG Options; provided that as of the Effective Time, 20%
of such unvested BFG Options will be immediately exercisable representing the
following shares of CELCORE Common Stock: Mr. Berger, 67,500 shares; Mr. Foley,
16,500 shares; and Mr. Gonzalez, 22,500 shares. See "The Merger -- Interests of
Certain Persons; Possible Conflicts of Interest."
 
     DSC and Messrs. Berger, Foley and Gonzalez have agreed that the payments
under the Employment Agreements will be contingent upon the approval of the
holders of more than 75% of the outstanding CELCORE Capital Stock (and, for this
purpose, the shares of CELCORE Common Stock held by Messrs. Berger, Foley and
Gonzalez and certain of their related parties are not counted as outstanding),
voting together as a single class, represented and entitled to vote at the
Special Meeting or any adjournment thereof. The approval of the payments under
the Employment Agreements is not a condition to the consummation of the Merger.
However, in the absence of such stockholder approval, certain payments under the
Employment Agreements made within one year of the Effective Time might be
considered as "parachute payments" under Section 280G of the Code. To the extent
such payments are considered "excess parachute payments," then under Section
4999 of the Code, Messrs. Berger, Foley and Gonzalez would be obligated to pay a
non-deductible excise tax of 20% on their respective excess parachute payments
and, under Section 280G of the Code, DSC would not be able to deduct the amount
of the excess parachute payments.
 
     The term "excess parachute payment" is defined in Section 280G of the Code.
This definition is based upon the term "parachute payment" which (in the absence
of certain conditions) means any payment in the nature of compensation to, among
others, an officer of a corporation when such payment is contingent upon (and
would not be made except for) a change in the ownership or effective control of
such corporation. The amount of any excess parachute payment is reduced by any
portion of the payment that is established by clear and convincing evidence as
reasonable compensation for personal services actually rendered by such person
 
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<PAGE>   87
 
on, after or before the date of the change in ownership or control. Any payment
pursuant to an agreement (or an amendment of a previous agreement) that is
entered into within one year before a change in ownership or control is presumed
to be contingent on such change unless the contrary is established by clear and
convincing evidence. A "parachute payment" exists if the aggregate present value
of the parachute payments equals or exceeds an amount equal to three times the
recipient's average annual compensation for the immediately preceding five years
(the "Base Amount").
 
     Certain payments, such as certain severance payments, if any, and bonus
payments made to Messrs. Berger, Foley and Gonzalez pursuant to the Employment
Agreements and the value realized from BFG Options held by such persons, might
be considered to be "excess parachute payments" if such payments are later
determined to have been contingent upon (and would not be made except for) a
change in the ownership or effective control of such corporation and are not
considered reasonable compensation. Because the proposed regulations under
Section 280G of the Code are subject to varying interpretations, it is difficult
to determine the exact amounts under the Employment Agreements which would
constitute parachute payments. Additionally, legislative, judicial, or
administrative changes or interpretations may be forthcoming that could alter or
modify any current understandings as to what constitutes a parachute payment
pursuant to Section 280G of the Code and the proposed regulations thereunder.
Therefore, it is not possible at this time to determine with certainty what
payments under the Employment Agreements are parachute payments. Although
CELCORE believes that such payments are reasonable compensation for personal
services actually rendered by Messrs. Berger, Foley and Gonzalez, there can be
no assurance that the IRS or the courts will not treat all or a portion of such
other payments under the Employment Agreements as "parachute payments," within
the meaning of Section 280G of the Code.
 
     Notwithstanding the foregoing, under Section 280G of the Code, a payment to
an officer of a corporation (such as Messrs. Berger, Foley and Gonzalez) will
not be considered a parachute payment if the following conditions are met:
 
     (a) immediately before the change of control, no stock in the corporation
         was readily tradeable on an established securities market or otherwise;
         and
 
     (b) the payment is approved by persons who hold, immediately before the
         change of control, more than 75% of the voting power of all outstanding
         stock of such corporation after adequate disclosure to the stockholders
         of all material facts concerning the payment. For purposes of this
         vote, the shares of CELCORE Capital Stock owned by Messrs. Berger,
         Foley and Gonzalez and certain of their respective related parties will
         not be counted as outstanding.
 
     There is no established trading market for the shares of CELCORE Capital
Stock. See "Summary -- Market Price Information." As a result, the payments
under the Employment Agreements will not be considered parachute payments if the
stockholders of CELCORE approve the payments under the Employment Agreements.
 
VOTE REQUIRED FOR APPROVAL
 
     The affirmative vote of the holders of 75% of the outstanding shares of
CELCORE Capital Stock (other than shares held by Messrs. Berger, Foley and
Gonzalez and certain of their respective related parties), voting together as a
single class, represented and entitled to vote at the Special Meeting or any
adjournment thereof, is necessary to approve the payments under the Employment
Agreements. Pursuant to the Voting Agreements, each Principal Stockholder has
agreed to vote, and has granted an irrevocable proxy to allow DSC to vote, the
Principal Stockholder Shares in favor of the Employment Agreements. The
Principal Stockholders may be deemed to beneficially own approximately 85.0% of
the shares of CELCORE Capital Stock. Therefore, no additional votes from the
holders of CELCORE Capital Stock are necessary to approve the payments under the
Employment Agreements.
 
     THE BOARD OF DIRECTORS OF CELCORE UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS
VOTE IN FAVOR OF THE PROPOSAL TO APPROVE THE PAYMENTS UNDER THE EMPLOYMENT
AGREEMENTS.
 
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<PAGE>   88
 
              PROPOSAL TO APPROVE THE WAIVER OF LIQUIDATION RIGHTS
                     BY HOLDERS OF CELCORE PREFERRED STOCK
 
     Proposal 3 seeks approval of the holders of CELCORE Preferred Stock to
waive any Liquidation Rights as provided in the Certificate of Incorporation and
Certificates of Designations of CELCORE. The waiver of such Liquidation Rights
by the holders of CELCORE Preferred Stock is a condition to consummation of the
Merger. As currently in force, the Certificate of Incorporation and Certificates
of Designations of CELCORE provide that in the event of any voluntary or
involuntary liquidation, dissolution or winding up of CELCORE, or any merger or
consolidation of CELCORE with any other corporation or entity or the sale of all
or substantially all of CELCORE's assets to any other person, before any
distribution or payment shall be made to or set apart for the holders of CELCORE
Common Stock, the holders of Series B Preferred Stock, Series C Preferred Stock
and Series D Preferred Stock shall be entitled to receive from the assets of
CELCORE $2.00, $6.00 and $8.00 per share, respectively, in cash or other
property, such amount to be appropriately adjusted in the event of any stock
dividend, stock split or combination, or similar recapitalization, plus
dividends accrued but undeclared thereon. After holders of Series B Preferred
Stock, Series C Preferred Stock and Series D Preferred Stock have received the
full amount of their liquidation preferences, the holders of Series A Preferred
Stock will be entitled to receive prior and in preference to any distribution of
any assets of CELCORE to the holders of CELCORE Common Stock, $0.50 per share in
cash or other property, such amount to be appropriately adjusted in the event of
any stock dividend, stock split or combination, or similar recapitalization,
plus all accrued and unpaid dividends. The Certificate of Incorporation and
Certificates of Designations of CELCORE further provide, however, that with
respect to any Liquidation Rights to which a holder of CELCORE Preferred Stock
would be entitled upon a merger or consolidation of CELCORE with any other
corporation or entity or the sale of all or substantially all of CELCORE's
assets to any other person, such Liquidation Rights may be waived if the holders
of 80% of the outstanding shares of CELCORE Preferred Stock, voting together as
a single class, agree to such a waiver.
 
     The approval of Proposal 3 is necessary in order for CELCORE to effectuate
the Merger. Pursuant to the terms of the Merger Agreement, each share of CELCORE
Preferred Stock outstanding at the Effective Time will be converted into a
fraction of a share of DSC Common Stock, based on the Exchange Ratio. CELCORE
stockholders will also receive the Preferred Stock Purchase Rights attaching to
such stock pursuant to the DSC Rights Agreement. Any resulting fractional share
interest will be paid in cash. Pursuant to the terms of the Merger Agreement, an
aggregate amount equal to 5.333% of the shares of DSC Common Stock otherwise
issuable to holders of CELCORE Capital Stock by virtue of the Merger will be
placed into the Escrow Funds. See "Certain Provisions of the Merger
Agreement -- Conversion of Securities" and "-- Escrow and Indemnification."
 
VOTE REQUIRED FOR APPROVAL
 
     The affirmative vote of 80% of the outstanding shares of CELCORE Preferred
Stock, voting together as a single class, represented and entitled to vote at
the Special Meeting or any adjournment thereof, is necessary to approve Proposal
3. Pursuant to the Voting Agreements, each Principal Stockholder who is a holder
of CELCORE Preferred Stock has waived, and has agreed to vote and has granted an
irrevocable proxy to DSC to vote in favor of the waiver of, any Liquidation
Rights as provided in the Certificate of Incorporation and Certificates of
Designations of CELCORE. The Principal Stockholders may be deemed to
beneficially own approximately 80.14% of the shares of CELCORE Preferred Stock.
Therefore, no additional votes from the holders of CELCORE Preferred Stock are
necessary to approve the waiver of the Liquidation Rights as provided in the
Certificate of Incorporation and Certificates of Designations of CELCORE. THE
APPROVAL OF PROPOSAL 3 BY THE HOLDERS OF CELCORE PREFERRED STOCK IS A CONDITION
TO CONSUMMATION OF THE MERGER. ANY FAILURE TO OBTAIN THE REQUISITE APPROVAL FOR
PROPOSAL 3 WILL LIKELY PREVENT THE CONSUMMATION OF THE MERGER.
 
     THE BOARD OF DIRECTORS OF CELCORE UNANIMOUSLY RECOMMENDS THAT THE HOLDERS
OF CELCORE PREFERRED STOCK VOTE IN FAVOR OF THE PROPOSAL TO WAIVE ANY
LIQUIDATION RIGHTS THEY HAVE AS PROVIDED IN THE CERTIFICATE OF INCORPORATION AND
CERTIFICATES OF DESIGNATIONS OF CELCORE.
 
                                       82
<PAGE>   89
 
                                 LEGAL MATTERS
 
     The legality of the shares of DSC Common Stock being offered hereby will be
passed upon for DSC by Baker & McKenzie, Dallas, Texas. The federal income tax
consequences in connection with the Merger will be passed upon for DSC by Baker
& McKenzie and for CELCORE by Powell, Goldstein, Frazer & Murphy LLP.
 
                                    EXPERTS
 
     The consolidated financial statements and schedule of DSC and its
subsidiaries incorporated by reference in DSC's Annual Report (Form 10-K) for
the year ended December 31, 1996, have been audited by Ernst & Young LLP,
independent auditors, as set forth in their report thereon incorporated by
reference therein and incorporated herein by reference. Such consolidated
financial statements are incorporated herein by reference in reliance upon such
report given upon the authority of such firm as experts in accounting and
auditing.
 
     The financial statements of CELCORE as of December 31, 1995 and 1996, and
for each of the years in the three-year period ended December 31, 1996, have
been included herein and in the registration statement in reliance upon the
report of KPMG Peat Marwick, LLP, independent certified public accountants,
appearing elsewhere herein, and upon the authority of said firm as experts in
accounting and auditing.
 
     The fairness opinion of DLJ incorporated by reference in this
Prospectus/Proxy Statement has been so incorporated in reliance upon the
authority of DLJ as experts in investment banking.
 
                                       83
<PAGE>   90
 
                               GLOSSARY OF TERMS
 
A Interface................  The standard interface between the MSC and the BSC
                             in a GSM system whose purpose is to pass connection
                             related messages and paging requests between the
                             MSC and BSC. It is the most common "division point"
                             between the "switching" portion (MSC) and the
                             "radio" portion (BSC) of a GSM system.
 
AMPS.......................  An acronym for Advanced Mobile Phone Service, an
                             analog cellular standard originally developed by
                             Bell Labs and in use throughout North and South
                             America and many other world markets.
 
Base Station...............  The network element that consists of the radio
                             frequency transmitter/receiver assembly used to
                             generate and receive the RF signal to communicate
                             with mobile and portable cellular phones
                             (subscribers).
 
BSC........................  An acronym for the Base Station Controller, a
                             network element that controls the Base Station
                             resources including assigning voice channels,
                             managing call hand-offs, and controlling the power
                             output of the Base Station transmitters. The
                             division of functionality between the BSC and the
                             Base Stations varies from one manufacturer to
                             another.
 
CDMA.......................  An acronym for Code Division Multiple Access which
                             is a technique for organizing a radio channel. In
                             this context, it refers to the IS-95 standard air
                             link protocol. In this implementation, a single
                             1.25MHz wideband carrier transmits a digital
                             sequence that contains coded information that can
                             support approximately 20 simultaneous voice
                             conversations.
 
GSM........................  An acronym for Global System for Mobile
                             Communications. The ETSI standard for digital
                             cellular telephone systems that operate in the 890
                             to 960 MHZ frequency range. Although originally
                             specified for use in Europe, the standard has now
                             been adopted globally by more than 100 countries.
 
HLR........................  An acronym for Home Location Register which is a
                             database of subscribers that are registered with
                             the network and contains profile and billing
                             information.
 
IS-41......................  An abbreviation for Interim Standard 41 which is an
                             ANSI standard officially entitled "Cellular Radio
                             Telecommunications Intersystem Operations." It
                             describes the procedures and message formats that
                             are sent between networks that are necessary to
                             provide cellular subscribers transparency of
                             service when roaming between different cellular
                             systems.
 
JAVA.......................  An interpreted, platform independent, object
                             oriented language designed specifically for
                             graphical applications.
 
MoU........................  An acronym for Memorandum of Understanding. In this
                             context, it refers to the GSM MoU which is an
                             organization of Operators, prospective operators,
                             and government regulatory bodies that meet
                             regularly and form cooperative agreements covering
                             the commercial and operational aspects of GSM. The
                             GSM MoU was formed in 1987.
 
MSC........................  An acronym for Mobile service Switching Center
                             which is the network element responsible for
                             setting up and terminating mobile calls to other
                             mobiles as well as to the PSTN. It is often
                             referred to as the "switch".
 
NMS........................  An acronym for Network Management System which is
                             the network component that is used to monitor and
                             control various network elements.
 
                                       84
<PAGE>   91
 
                             Some systems also are used to add, delete, and
                             modify subscriber databases. These functions are
                             also referred to as an Operations Maintenance
                             Center (OMC) or OA&M (see below).
 
OA&M.......................  An acronym for Operations, Administration, and
                             Maintenance system which, as its name implies,
                             includes all of the facilities associated with
                             operating and controlling the entities within a
                             system. This function can be performed by one or
                             more Network Management Systems (NMS) or Operations
                             Maintenance Centers (OMC).
 
Object oriented............  A software development strategy that organizes
                             software as a collection of objects that contain
                             both data structure and behavior.
 
OMC-R......................  An acronym for Operations Maintenance Center for
                             Radio subsystem which is the entity used to
                             configure, monitor, and control the radio system
                             components. In GSM systems, the OMC-R provides
                             these functions for the Base Station Controllers
                             and the Base Stations.
 
OMC-S......................  An acronym for Operations Maintenance Center for
                             Switching subsystem which is the entity used to
                             configure, monitor, and control the switching
                             system components. In GSM systems, the OMC-S can
                             provide these functions for the MSC, HLR, VLR, AuC,
                             and other related components.
 
PCS........................  An acronym for Personal Communications Systems
                             which is a broad conceptual term that is used to
                             describe advanced communications services for
                             wireline and wireless networks for both voice and
                             data. In the context of this document, it refers to
                             digital airlink protocol wireless systems typically
                             operating at either 1,800 or 1,900 MHZ.
 
PSTN.......................  An acronym for Public Switched Telephone Network
                             which is the ordinary dial-up telephone network
                             with its multitude of country specific variants.
 
Switch.....................  An abbreviation for a wireline or cellular
                             telephone exchange or switching center that is used
                             to connect calling and called parties.
 
TDMA.......................  An acronym for Time Division Multiple Access which
                             is a technique for organizing a radio channel. In
                             this context, it refers to the IS-136 standard air
                             link protocol. In this implementation, a single
                             30KHz wideband carrier transmits a digital sequence
                             that contains coded information that supports three
                             simultaneous voice conversations.
 
VLR........................  An acronym for Visitor Location Register which is a
                             database of subscribers that are registered within
                             the area of the network that is under its control.
                             It is, therefore, made up of "temporary" entries
                             that are obtained from queries to each subscriber's
                             Home Location Register.
 
Wireless Local Loop........  Refers to the use of a radio link to link fixed
                             location telephone subscribers to the wired Public
                             Switched Telephone Network. The radio link and
                             complexity of a Wireless Local Loop system can vary
                             from as simple as a "last mile" basic one channel
                             radio system that emulates a copper pair of
                             telephone lines to a highly complex, city wide
                             network with active antenna systems designed to
                             accommodate 100,000 or more subscribers.
 
                                       85
<PAGE>   92
 
                                 CELCORE, INC.
 
                    INDEX TO HISTORICAL FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                           <C>
Independent Auditors' Report................................  F-2
Balance Sheets as of December 31, 1995 and 1996.............  F-3
Statements of Operations for the Years Ended December 31,
  1994, 1995 and 1996.......................................  F-4
Statements of Redeemable Preferred Stock, Shareholders'
  Equity (Deficit) and Partners' Capital
  for the Years Ended December 31, 1994, 1995 and 1996......  F-5
Statements of Cash Flows for the Years Ended December 31,
  1994, 1995 and 1996.......................................  F-6
Notes to Financial Statements...............................  F-7
Balance Sheet as of September 30, 1997 (unaudited)..........  F-14
Statements of Operations for the Nine Months Ended September
  30, 1996 and 1997
  (unaudited)...............................................  F-15
Statements of Cash Flows for the Nine Months Ended September
  30, 1996 and 1997
  (unaudited)...............................................  F-16
Notes to Financial Statements...............................  F-17
</TABLE>
 
                                       F-1
<PAGE>   93
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors
Celcore, Inc.:
 
     We have audited the accompanying balance sheets of Celcore, Inc., as of
December 31, 1995 and 1996, and the related statements of operations, redeemable
preferred stock, shareholders' equity (deficit) and partners' capital and cash
flows for each of the years in the three-year period ended December 31, 1996.
These financial statements are the responsibility of Celcore's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Celcore, Inc. as of December
31, 1995 and 1996, and the results of its operations and its cash flows for each
of the years in the three-year period ended December 31, 1996, in conformity
with generally accepted accounting principles.
 
                                            KPMG Peat Marwick LLP
 
Memphis, Tennessee
February 10, 1997
 
                                       F-2
<PAGE>   94
 
                                 CELCORE, INC.
 
                                 BALANCE SHEETS
 
                           DECEMBER 31, 1995 AND 1996
 
<TABLE>
<CAPTION>
                                                                  1995            1996
                                                              ------------    ------------
<S>                                                           <C>             <C>
                           ASSETS
CURRENT ASSETS:
  Cash and cash equivalents.................................  $ 14,467,858    $ 12,056,065
  Accounts receivable, less allowances of $100,000 and
     $400,000 in 1995 and 1996, respectively (note 11)......     3,388,943       1,765,249
  Inventories (note 3)......................................     1,157,862       3,766,222
  Prepaid expenses and other current assets.................       138,166         457,574
                                                              ------------    ------------
          TOTAL CURRENT ASSETS..............................    19,152,829      18,045,110
                                                              ------------    ------------
Furniture and equipment (note 4)............................     1,993,243       5,444,866
Less accumulated depreciation and amortization..............      (317,688)     (1,150,331)
                                                              ------------    ------------
          NET FURNITURE AND EQUIPMENT.......................     1,675,555       4,294,535
                                                              ------------    ------------
Other assets................................................        81,587         487,282
                                                              ------------    ------------
                                                              $ 20,909,971    $ 22,826,927
                                                              ============    ============
 
       LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
 
CURRENT LIABILITIES:
  Current installments of long-term debt (note 5)...........  $         --    $    331,667
  Accounts payable..........................................     1,579,531       1,113,926
  Accrued expenses and other liabilities....................       249,950         586,513
  Accrued relocation and recruiting.........................       310,511         345,753
  Unearned revenue..........................................       454,338         362,758
                                                              ------------    ------------
          TOTAL CURRENT LIABILITIES.........................     2,594,330       2,740,617
Long-term debt (note 5).....................................            --         497,500
Other.......................................................        77,730          64,187
                                                              ------------    ------------
          TOTAL LIABILITIES.................................     2,672,060       3,302,304
                                                              ------------    ------------
REDEEMABLE PREFERRED STOCK, cumulative and convertible, $.10
  par value, aggregate liquidation and redemption value of
  $24,228,270 in 1995 and $40,262,086 in 1996 Shares
  authorized -- 7,000,000 in 1995 and 9,500,000 in 1996;
  shares issued and outstanding -- 6,038,045 in 1995 and
  8,042,272 in 1996 (note 7)................................    23,188,966      39,292,597
 
COMMITMENTS AND CONTINGENCIES (NOTE 6)
 
SHAREHOLDERS' EQUITY (DEFICIT) (NOTES 8 AND 10):
  Series A preferred stock, cumulative and convertible $.10
     par value, aggregate liquidation value of $2,250,000.
     4,500,000 shares authorized, issued and outstanding....       450,000         450,000
  Common stock, $.10 par value; shares
     authorized -- 50,000,000; shares issued and
     outstanding -- 5,500,000 in 1995 and 5,507,500 in
     1996...................................................       550,000         550,750
  Accumulated deficit.......................................    (5,951,055)    (20,768,724)
                                                              ------------    ------------
          TOTAL SHAREHOLDERS' EQUITY (DEFICIT)..............    (4,951,055)    (19,767,974)
                                                              ------------    ------------
                                                              $ 20,909,971    $ 22,826,927
                                                              ============    ============
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                       F-3
<PAGE>   95
 
                                 CELCORE, INC.
 
                            STATEMENTS OF OPERATIONS
 
                  YEARS ENDED DECEMBER 31, 1994, 1995 AND 1996
 
<TABLE>
<CAPTION>
                                                        1994            1995            1996
                                                    ------------    ------------    ------------
<S>                                                 <C>             <C>             <C>
Net revenues (notes 11 and 12)....................  $  2,166,050    $  4,907,855    $  3,680,032
Cost of revenues..................................       709,404       1,762,013       1,350,854
                                                    ------------    ------------    ------------
  Gross profit....................................     1,456,646       3,145,842       2,329,178
                                                    ------------    ------------    ------------
Operating expenses:
  Research and development........................     1,033,315       3,261,607       6,700,300
  Sales and marketing.............................       546,974       2,104,720       4,207,391
  General and administrative......................       595,571       2,288,190       6,560,377
                                                    ------------    ------------    ------------
                                                       2,175,860       7,654,517      17,468,068
                                                    ------------    ------------    ------------
     Operating loss...............................      (719,214)     (4,508,675)    (15,138,890)
Other income, net (note 13).......................         5,098         235,576         507,451
                                                    ------------    ------------    ------------
     Net loss.....................................  $   (714,116)   $ (4,273,099)   $(14,631,439)
                                                    ============    ============    ============
     Net loss per common share (note 2)...........                  $      (0.81)   $      (2.69)
                                                                    ============    ============
     Weighted average common shares outstanding...                     5,500,000       5,501,567
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                       F-4
<PAGE>   96
 
                                 CELCORE, INC.
 
                   STATEMENTS OF REDEEMABLE PREFERRED STOCK,
              SHAREHOLDERS' EQUITY (DEFICIT) AND PARTNERS' CAPITAL
 
                  YEARS ENDED DECEMBER 31, 1994, 1995 AND 1996
 
<TABLE>
<CAPTION>
                                                                  SHAREHOLDERS' EQUITY (DEFICIT)             PARTNERS' CAPITAL
                                                         ------------------------------------------------        (NOTE 1)
                                           REDEEMABLE    PREFERRED              ADDITIONAL                  -------------------
                                            PREFERRED      STOCK      COMMON     PAID-IN     ACCUMULATED    GENERAL    LIMITED
                                              STOCK      SERIES A     STOCK      CAPITAL       DEFICIT      PARTNER   PARTNERS
                                           -----------   ---------   --------   ----------   ------------   -------   ---------
<S>                                        <C>           <C>         <C>        <C>          <C>            <C>       <C>
Balance at December 31, 1993.............  $       --    $     --    $    --     $    --     $        --    $ 2,195   $ 217,262
  Net loss through November 13, 1994.....          --          --         --          --              --     (4,635)   (458,909)
  Issuance of 4,500,000 shares of Series
    A preferred stock....................          --     450,000         --          --        (691,647)        --     241,647
  Issuance of 5,500,000 shares of common
    stock................................          --          --    550,000          --        (552,440)     2,440          --
  Sale of 1,625,000 shares of Series B
    preferred stock......................   3,150,446          --         --          --              --         --          --
  Accretion of redeemable preferred
    stock................................      12,413          --         --          --         (12,413)        --          --
  Net loss from inception of corporation
    to December 31, 1994.................          --          --         --          --        (250,572)        --          --
                                           -----------   --------    --------    -------     ------------   -------   ---------
Balance at December 31, 1994.............   3,162,859     450,000    550,000          --      (1,507,072)        --          --
  Sale of 1,375,000 shares of Series B
    preferred stock......................   2,732,342          --         --          --              --         --          --
  Sale of 3,038,046 shares of Series C
    preferred stock......................  17,122,881          --         --          --              --         --          --
  Accretion of redeemable preferred
    stock................................     170,884          --         --          --        (170,884)        --          --
  Net loss for the year ended December
    31, 1995.............................          --          --         --          --      (4,273,099)        --          --
                                           -----------   --------    --------    -------     ------------   -------   ---------
Balance at December 31, 1995.............  23,188,966     450,000    550,000          --      (5,951,055)        --          --
  Exercise of options for 7,500 shares of
    common stock.........................          --          --        750       7,125              --         --          --
  Sale of 2,004,227 shares of Series D
    preferred stock......................  15,910,276          --         --          --              --         --          --
  Accretion of redeemable preferred
    stock................................     193,355          --         --      (7,125)       (186,230)        --          --
  Net loss for the year ended December
    31, 1996.............................          --          --         --          --     (14,631,439)        --          --
                                           -----------   --------    --------    -------     ------------   -------   ---------
Balance at December 31, 1996.............  $39,292,597   $450,000    $550,750    $    --     $(20,768,724)  $    --   $      --
                                           ===========   ========    ========    =======     ============   =======   =========
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                       F-5
<PAGE>   97
 
                                 CELCORE, INC.
 
                            STATEMENTS OF CASH FLOWS
                  YEARS ENDED DECEMBER 31, 1994, 1995 AND 1996
 
<TABLE>
<CAPTION>
                                                        1994            1995            1996
                                                    ------------    ------------    ------------
<S>                                                 <C>             <C>             <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss........................................  $   (714,116)   $ (4,273,099)   $(14,631,439)
  Adjustments to reconcile net loss to net cash
     used in operating activities:
     Depreciation and amortization................        51,905         272,534         853,649
     Loss on sale of equipment....................            --              --          26,812
     Changes in operating assets and liabilities:
       Accounts receivable........................      (403,260)     (2,985,683)      1,623,694
       Inventories................................      (166,262)       (973,335)     (2,608,360)
       Prepaids and other assets..................       (23,934)       (112,955)       (319,408)
       Accounts payable...........................       137,604       1,425,333        (465,605)
       Accrued expenses and other liabilities.....       180,114         320,350         377,609
       Unearned revenue...........................       (16,740)        151,078         (91,580)
                                                    ------------    ------------    ------------
          TOTAL ADJUSTMENTS.......................      (240,573)     (1,902,678)       (603,189)
                                                    ------------    ------------    ------------
          NET CASH USED IN OPERATING ACTIVITIES...      (954,689)     (6,175,777)    (15,234,628)
                                                    ------------    ------------    ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of furniture and equipment............      (269,258)     (1,488,976)     (3,510,578)
  Proceeds from disposal of equipment.............            --              --          19,974
  Purchase of treasury bill.......................            --              --        (414,532)
  Other...........................................       (41,029)             --              --
                                                    ------------    ------------    ------------
          NET CASH USED IN INVESTING ACTIVITIES...      (310,287)     (1,488,976)     (3,905,136)
                                                    ------------    ------------    ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from sale of stock.....................     3,150,446      19,855,223      15,918,151
  Proceeds from issuance of long-term debt........            --              --         995,000
  Principal payments on long-term debt............            --              --        (165,833)
  Other...........................................            --         (37,635)        (19,347)
                                                    ------------    ------------    ------------
          NET CASH PROVIDED BY FINANCING
            ACTIVITIES............................     3,150,446      19,817,588      16,727,971
                                                    ------------    ------------    ------------
Net increase (decrease) in cash and cash
  equivalents.....................................     1,885,470      12,152,835      (2,411,793)
Cash and cash equivalents at beginning of year....       429,553       2,315,023      14,467,858
                                                    ------------    ------------    ------------
Cash and cash equivalents at end of year..........  $  2,315,023    $ 14,467,858    $ 12,056,065
                                                    ============    ============    ============
Supplemental disclosure:
  Interest paid for 1996 was $71,066. Capital
lease
  obligations of $155,664 and $20,461 were
     incurred in
  1995 and 1996, respectively
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                       F-6
<PAGE>   98
 
                                 CELCORE, INC.
 
                         NOTES TO FINANCIAL STATEMENTS
 
(1) DESCRIPTION OF THE BUSINESS
 
     Celcore, Inc. (the "Company" or "Celcore"), a Delaware corporation, was
incorporated in September 1992, and acted as the general partner of Celcore LP
until November 1994, when it succeeded to the business of Celcore LP as a result
of a reorganization. The reorganization was affected by the exchange of
convertible preferred stock to the Class B limited partners and common stock to
the Class A limited partners and the general partner. The Partnership was
liquidated, and all of the Partnership's assets were transferred to the Company
and all of the liabilities of the Partnership were assumed by the Company; such
assets and liabilities were recorded in the Company's financial statements at
the Partnership's carrying value.
 
     The Company designs, assembles and installs cost-effective wireless
telecommunications systems for cellular, PCS and wireless local loop
applications in low teledensity markets. The Company's "Target Markets" are
rural locations and areas in developing countries with low teledensities and
where wireline or traditional wireless infrastructure is not readily available
or economically feasible.
 
     Since inception of operations (March 1993), the Company has not generated
revenues sufficient to cover its operating expenses. The activities of the
Company continue to require significant amounts of working capital to finance
its operations. During 1994, 1995, and 1996, the Company raised additional
capital of $3,150,446, $19,855,223 and $15,918,151, respectively, to support
operations. The Company may require additional cash infusions until such time as
operations become self-sustaining.
 
(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Cash Equivalents
 
     Cash equivalents of approximately $14,200,000 and $11,259,000 at December
31, 1995 and 1996, respectively, consisted of overnight repurchase agreements,
treasury bills and securities of federal agencies with an initial term of less
than 90 days. For purposes of the statements of cash flows, the Company
considers all highly liquid debt instruments with original maturities of 90 days
or less to be cash equivalents.
 
  Inventories
 
     Inventories are stated at the lower of cost (first-in, first-out) or
market.
 
  Furniture and Equipment
 
     Furniture and equipment are stated at cost. Furniture under capital leases
is stated at the present value of minimum lease payments. Depreciation and
amortization of furniture and equipment is calculated on a straight-line basis
over the estimated useful lives of the respective assets which are principally 7
years for furniture, 5 years for computer hardware, and 3 years for computer
software.
 
  Fair Value of Financial Instruments
 
     The carrying values of the Company's financial instruments recorded on the
accompanying balance sheets approximate fair value due to the short-term nature
of the financial instruments.
 
  Impairment of Long-Lived Assets and Long-Lived Assets to be Disposed Of
 
     The Company adopted the provisions of Statement of Financial Accounting
Standards No. 121 (SFAS 121), Accounting for the Impairment of Long-Lived Assets
and For Long-Lived Assets to be Disposed Of, on January 1, 1996. This Statement
requires that long-lived assets and certain identifiable intangibles be reviewed
for impairment whenever events or changes in circumstances indicate that the
carrying amount of an asset may not be recoverable. Recoverability of assets to
be held and used is measured by a comparison of the carrying amount of an asset
to future net cash flows expected to be generated by the asset.
 
                                       F-7
<PAGE>   99
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
If such amounts are considered to be impaired, the impairment to be recognized
is measured by the amount by which the carrying amount of the assets exceed the
fair value of the assets. Assets to be disposed of are reported at the lower of
the carrying amount of fair value less costs to sell. Adoption of this Statement
did not have a material impact on the Company's financial position, results of
operations, or liquidity.
 
  Income Taxes
 
     The Company is subject to income taxes under the provisions of SFAS 109,
Accounting for Income Taxes. Under the asset and liability method of Statement
109, deferred tax assets and liabilities are recognized for the estimated future
tax consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases. Deferred tax assets and liabilities are measured using enacted tax rates
in effect for the year in which those temporary differences are expected to be
recovered or settled. Under SFAS 109, the effect on deferred tax assets and
liabilities of a change in tax rates is recognized in income in the period that
includes the enactment date. In assessing the realizability of the deferred tax
assets, management considers whether it is more likely than not that the
deferred tax assets will be realized through the generation of future taxable
income.
 
  Revenue Recognition
 
     For contracts involving new technologies, revenues and profits or parts
thereof are deferred until technological feasibility is established, the
products are delivered and customer acceptance is obtained. For other product
sales, revenue is recognized at the time of shipment. Revenue from system
installation and training is recognized as services are provided.
 
  Unearned Revenue
 
     The Company received payments in 1994, 1995 and 1996 relating to sales
commitments to customers for future shipment of the Company's products. These
payments have been recorded as unearned revenue and recognized as revenue in
accordance with the Company's revenue recognition policy.
 
  Research and Development
 
     Research and development costs are expensed as incurred.
 
  Loss Per Common Share
 
     The Company's net loss per share calculations are based upon the weighted
average number of shares of common stock outstanding for each period. Common
shares issuable upon conversion of the Company's preferred stock or common
equivalent shares issuable, using the treasury stock method, upon the exercise
of options to purchase common stock have not been included as the effect on net
loss per common share would be antidilutive. Net loss per common share has been
adjusted for the accretion of the Company's preferred stock to its redemption
value, which accretion has been included in Shareholders' deficit. The Company
has not paid dividends to holders of the Company's common or preferred stock
since its inception.
 
     The Company operated as a limited partnership during most of 1994;
therefore, net loss per common share during 1994 is not applicable.
 
  Concentrations of Risk
 
     Financial instruments which potentially expose the Company to
concentrations of credit risk consist primarily of trade accounts receivable.
The Company sells its products and services throughout the world to places such
as Asia, Africa, Europe and South America. The Company performs an ongoing
credit evaluation
 
                                       F-8
<PAGE>   100
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
of its customers' financial condition and has established an allowance for
non-collection of accounts receivable based upon the collectibility of all
accounts receivable.
 
  Use of Estimates in Preparation of Financial Statements
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
 
  Stock Option Plan
 
     Prior to January 1, 1996, the Company accounted for its stock option plan
in accordance with the provisions of Accounting Principles Board ("APB") Opinion
25, Accounting for Stock Issued to Employees, and related interpretations. As
such, compensation expense would be recorded on the date of grant only if the
current market price of the underlying stock exceeded the exercise price. On
January 1, 1996, the Company adopted SFAS 123, Accounting for Stock-Based
Compensation, which permits entities to recognize as expense over the vesting
period the fair value of all stock-based awards on the date of grant.
Alternatively, SFAS 123 also allows entities to continue to apply the provisions
of APB Opinion 25 and provide pro forma net income and pro forma earnings per
share disclosures for employee stock option grants made in 1995 and future years
as if the fair-value-based method defined in SFAS 123 had been applied. The
Company has elected to continue to apply the provisions of APB Opinion 25 and
provide the pro forma disclosure provisions of SFAS 123.
 
(3) INVENTORIES
 
     Inventories at December 31, 1995 and 1996 consisted of the following:
 
<TABLE>
<CAPTION>
                                                                 1995          1996
                                                              ----------    ----------
<S>                                                           <C>           <C>
Raw materials...............................................  $1,085,128    $  517,709
Work in process.............................................      44,797        20,850
Finished goods..............................................      27,937     3,227,663
                                                              ----------    ----------
                                                              $1,157,862    $3,766,222
                                                              ==========    ==========
</TABLE>
 
(4) FURNITURE AND EQUIPMENT
 
     Furniture and equipment at December 31, 1995 and 1996 consisted of the
following:
 
<TABLE>
<CAPTION>
                                                                 1995          1996
                                                              ----------    ----------
<S>                                                           <C>           <C>
Furniture...................................................  $  285,779    $  372,116
Computer hardware...........................................   1,220,417     3,885,192
Computer software...........................................     487,047     1,187,558
                                                              ----------    ----------
                                                              $1,993,243    $5,444,866
                                                              ==========    ==========
</TABLE>
 
(5) LONG-TERM DEBT
 
     On August 27, 1996, the Company entered into a loan and security agreement
for a $3,000,000 working capital line of credit, a $3,000,000 export/import
working capital line of credit and a $1,000,000 equipment line of credit. The
lines of credit are secured by substantially all assets of the Company and bear
interest at a rate of prime plus 1% for the working capital line of credit and
prime plus 1 1/2% for the export/import working
 
                                       F-9
<PAGE>   101
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
capital line of credit and the equipment line of credit. At December 31, 1996,
the lines of credit had no outstanding balances.
 
     Long-term debt at December 31, 1996 consisted of a note payable for
$829,167 due in monthly principal payments of $27,639 plus interest at prime
plus 1 1/2% (9.75% at December 31, 1996), with final payment due June 1999; the
note was secured by substantially all assets of the Company.
 
     The Company's loan agreements contain various debt covenants including
tangible net worth, certain financial ratios and restrictions on dividends.
 
     Aggregated maturities of long-term debt as of December 31, 1996 are as
follows: 1997, $331,667; 1998, $331,667 and 1999, $165,833.
 
(6) COMMITMENTS AND CONTINGENCIES
 
     The Company has several noncancelable operating leases, primarily for
office space. Total rental expense for operating leases was $40,673, $187,722
and $600,237 for the years ended December 31, 1994, 1995 and 1996, respectively.
 
     Future minimum lease payments under noncancelable operating leases as of
December 31, 1996 are:
 
<TABLE>
<CAPTION>
 YEAR ENDED
DECEMBER 31,
- ------------
<S>          <C>                                               <C>
   1997......................................................  $  575,080
   1998......................................................     575,385
   1999......................................................     260,625
   2000......................................................      45,393
                                                               ----------
                                                               $1,456,483
                                                               ==========
</TABLE>
 
(7) REDEEMABLE PREFERRED STOCK
 
  Series B Preferred Stock
 
     The 3,000,000 issued shares of Series B preferred stock have a liquidation
value of $2.00 per share and are participating and voting. Each share of Series
B preferred stock is convertible into shares of common stock at a conversion
rate of one share of common stock for each share of preferred stock. The Company
shall redeem one-third of the outstanding preferred shares on each of December
1, 2000, 2001 and 2002. The redemption price shall be $2.00 per share plus all
declared dividends (note to date) and accrued dividends up to the redemption
dates.
 
       Series C Preferred Stock
 
     The 3,038,046 issued shares of Series C preferred stock have a liquidation
value of $6.00 per share and are participating and voting. Each share of Series
C preferred stock is convertible into shares of common stock at a conversion
rate of one share of common stock for each share of preferred stock. The Company
shall redeem one-third of the outstanding preferred shares on each of December
1, 2000, 2001 and 2002. The redemption price shall be $6.00 per share plus all
declared dividends (none to date) and accrued dividends up to the redemption
dates.
 
  Series D Preferred Stock
 
     The 2,004,227 issued shares of Series D preferred stock have a liquidation
value of $8.00 per share and are participating and voting. Each share of Series
D preferred stock is convertible into shares of common stock at a conversion
rate of one share of common stock for each share of preferred stock. The Company
shall
 
                                      F-10
<PAGE>   102
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
redeem one-third of the outstanding preferred shares on each of December 1,
2000, 2001 and 2002. The redemption price shall be $8.00 per share plus all
declared dividends (none to date) and accrued dividends up to the redemption
dates.
 
     The Company is recording accretion to increase the carrying value of the
redeemable preferred stock to the redemption value of $40,262,086 by December 1,
2002.
 
(8) SHAREHOLDERS' EQUITY
 
  Common Stock
 
     Of the authorized but unissued shares as of December 31, 1996, 12,542,273
have been reserved for conversion rights of preferred stockholders.
 
  Series A Preferred Stock
 
     The 4,500,000 issued shares of Series A preferred stock have a liquidation
value of $0.50 per share and are participating and voting. Each share of Series
A preferred stock is convertible into shares of common stock at a conversion
rate of one share of common stock for each share of preferred stock.
 
(9) INCOME TAXES
 
     The tax effect of temporary differences at December 31, 1995 and 1996 is
presented below:
 
<TABLE>
<CAPTION>
                                                               1995           1996
                                                            -----------    -----------
<S>                                                         <C>            <C>
Deferred tax assets:
  Net difference in capitalized start-up, organization and
     patent expenses......................................  $    42,000    $    66,000
  Cash deposits recognized in taxable income..............      173,000        138,000
  Inventories, principally due to adjustment for tax
     purposes.............................................       21,000         24,000
  Accruals, principally for warranties and moving
     expenses.............................................      156,000        157,000
  Accounts receivable, principally for sales deductions...       38,000        152,000
  Federal and state loss carryforwards....................    1,444,000      7,041,000
                                                            -----------    -----------
          Total gross deferred tax assets.................    1,874,000      7,578,000
  Less valuation allowance................................   (1,808,000)    (7,357,000)
                                                            -----------    -----------
          Net deferred tax assets.........................       66,000        221,000
Deferred tax liabilities -- furniture and equipment,
  principally due to depreciation.........................      (66,000)      (221,000)
                                                            -----------    -----------
          Net deferred tax assets.........................  $        --    $        --
                                                            ===========    ===========
</TABLE>
 
     The ultimate realization of deferred tax assets is dependent upon the
generation of future taxable income during the period in which those temporary
differences become deductible. Due to the historical net operating losses,
management cannot reliably predict when the deferred assets can be realized.
Consequently, a valuation allowance of $195,000, $1,808,000 and $7,357,000 has
been provided at December 31, 1994, 1995 and 1996, respectively. At December 31,
1996, the Company has net operating loss carryforwards for federal and state
income tax purposes of approximately $18,500,000 which are available to offset
future federal and state income, if any, through 2012.
 
(10) STOCK OPTIONS
 
     The 1995 Stock Option Plan (the "1995 Plan") provides for the granting of
stock options to employees, directors or consultants to the Company. Under the
1995 Plan, the Board of Directors is authorized to issue up
 
                                      F-11
<PAGE>   103
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
to 2,000,000 shares of common stock. The Board has the authority to select the
individuals to receive options and determine the number of shares and terms of
the options granted.
 
     In December 1996, the 1995 Plan was frozen with the simultaneous adoption
of the 1996 Stock Incentive Plan (the "1996 Plan"). The 1996 Plan provides for
the granting of awards of shares of common stock, awards of derivative
securities related to the value of common stock, and certain cash awards to
employees, directors, and consultants of the Company. Awards under the 1996 Plan
are determined by a committee of no less than two members of the Board of
Directors. The Board of Directors has reserved 3,000,000 shares of Company
common stock for issuance pursuant to awards that may be made under the 1996
Plan, and has adopted a policy that shares of common stock issuable pursuant to
options outstanding under the 1995 Plan will be deducted from the number of
shares of common stock issuable pursuant to options outstanding under the 1996
Plan. The number of shares available under the 1996 Plan will be redetermined
each succeeding fiscal year to equal the greater of 3,000,000 or 15% of the
issued and outstanding shares of common stock on a fully diluted basis. The term
of the 1996 Plan is indefinite. Substantially all stock options under both plans
have 10 year terms and shall be exercisable as to 25% of the shares covered by
the options on the first, second, third and fourth anniversary of the dates of
the grant.
 
     As of December 31, 1996, options for 848,250 shares were available to be
awarded under the 1996 Plan.
 
     The per share weighted-average minimum value of the stock options granted
during 1995 and 1996 was $.027 and $.055, respectively, on the date of grant
using the minimum value method with the following weighted-average assumptions:
risk free interest rate of 7% and an expected life of 2 years after vesting.
 
     The Company applies APB Opinion No. 25 in accounting for the plans. The
exercise price of options at their respective grant dates is equal to the
estimated fair market value, and accordingly, no compensation cost has been
recognized for the stock options in the financial statements. Had the Company
determined compensation cost based on the minimum value at the grant date for
its stock options under SFAS 123, the Company's net loss for the years ended
December 31, 1995 and 1996 would have been increased to the pro forma amounts
indicated below:
 
<TABLE>
<CAPTION>
                                                                   NET LOSS
                                                         -----------------------------
                                                            1995              1996
                                                         -----------      ------------
<S>                                                      <C>              <C>
As reported........................................      $(4,273,099)     $(14,631,439)
Pro forma..........................................      $(4,335,326)     $(14,872,257)
Pro forma per share................................      $     (0.82)     $      (2.74)
</TABLE>
 
     In 1995 and 1996 the Board of Directors granted options to officers and
employees at various prices which were believed to approximate the fair market
value of the shares at the grant date. Activity with respect to these options
during the period indicated is as follows:
 
<TABLE>
<CAPTION>
                                                                           WEIGHTED-AVERAGE
                                                     NUMBER OF SHARES       EXERCISE PRICE
                                                     ----------------      ----------------
<S>                                                  <C>                   <C>
Balance at December 31, 1994...................                 --                 --
  Granted......................................          1,099,500              $1.02
  Canceled.....................................            (87,000)              1.05
                                                        ----------             ------
Balance at December 31, 1995...................          1,012,500               1.02
  Granted......................................          1,245,250               2.10
  Exercised....................................             (7,500)              1.05
  Canceled.....................................           (106,000)              1.84
                                                        ----------             ------
Balance at December 31, 1996...................          2,144,250              $1.61
                                                        ==========             ======
</TABLE>
 
                                      F-12
<PAGE>   104
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     At December 31, 1996, the range of exercise prices and weighted average
contractual life of outstanding options was $0.50 to $2.10 and 9 years.
 
     At December 31, 1996, the number of options exercisable was 260,250 and the
weighted average exercise price of those options was $1.00.
 
(11) SIGNIFICANT CUSTOMERS
 
     The Company's sales and trade accounts receivable are concentrated among a
small number of customers. For the year ended December 31, 1994, sales to two
customers aggregated approximately 78% and 16%, respectively, of total net
revenues. For the year ended December 31, 1995, sales to two customers
represented approximately 20% and 21%, respectively, of total net revenues. For
the year ended December 31, 1996, sales to five customers aggregated
approximately $2,500,000 representing approximately 72% of the Company's total
net revenues. Sales to these customers ranged from 10% to 17% of total net
revenues.
 
(12) GEOGRAPHIC INFORMATION
 
     Net Revenues from product sales and services provided outside the United
States for the years ended December 31, 1995 and 1996 (none in 1994) were as
follows:
 
<TABLE>
<CAPTION>
                                                                1995        1996
                                                              --------    --------
<S>                                                           <C>         <C>
Asia........................................................  $469,435    $ 21,583
Europe......................................................        --     580,202
Africa......................................................   530,035     387,576
                                                              --------    --------
                                                              $999,470    $989,361
                                                              ========    ========
</TABLE>
 
(13) OTHER INCOME, NET
 
<TABLE>
<CAPTION>
                                                       1994        1995        1996
                                                      -------    --------    --------
<S>                                                   <C>        <C>         <C>
Interest Income.....................................  $10,705    $255,381    $608,995
Interest Expense....................................   (5,607)     (9,429)    (71,066)
Other, net..........................................       --     (10,376)    (30,478)
                                                      -------    --------    --------
                                                      $ 5,098    $235,576    $507,451
                                                      =======    ========    ========
</TABLE>
 
                                      F-13
<PAGE>   105
 
                                 CELCORE, INC.
 
                                 BALANCE SHEET
                               SEPTEMBER 30, 1997
                                  (UNAUDITED)
 
<TABLE>
<S>                                                           <C>
                           ASSETS
CURRENT ASSETS:
  Cash and cash equivalents.................................  $    619,279
  Accounts receivable, less allowances of $477,336..........     4,153,989
  Finance receivables, current (note 2).....................       614,989
  Inventories (note 3)......................................     5,629,406
  Prepaid expenses and other current assets.................       817,238
                                                              ------------
          TOTAL CURRENT ASSETS..............................    11,834,901
                                                              ------------
Furniture and equipment.....................................     7,192,574
Less accumulated depreciation and amortization..............    (2,175,177)
                                                              ------------
          NET FURNITURE AND EQUIPMENT.......................     5,017,397
                                                              ------------
Finance receivables, long-term (note 2).....................       638,796
Other assets................................................       481,274
                                                              ------------
                                                              $ 17,972,368
                                                              ============
 
       LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
 
CURRENT LIABILITIES:
  Short-term debt (note 4)..................................  $    450,000
  Current installments of long-term debt (note 4)...........     2,385,972
  Accounts payable..........................................     4,840,740
  Accrued expenses and other liabilities....................     2,316,945
  Unearned revenue..........................................       741,686
                                                              ------------
          TOTAL CURRENT LIABILITIES.........................    10,735,343
                                                              ------------
  REDEEMABLE PREFERRED STOCK, cumulative and convertible,
     $.10 par value, aggregate liquidation and redemption
     value of $40,262,086
     Authorized 9,500,000 shares; 8,042,272 shares issued
      and outstanding.......................................    39,438,766
COMMITMENTS AND CONTINGENCIES (NOTE 8)
SHAREHOLDERS' EQUITY (DEFICIT):
  Series A preferred stock, cumulative and convertible $.10
     par value, aggregate liquidation value of $2,250,000.
     4,500,000 shares authorized, issued and outstanding....       450,000
  Common stock, $.10 par value; 50,000,000 shares
     authorized; 5,591,250 shares issued and outstanding....       559,125
  Accumulated deficit.......................................   (33,210,866)
                                                              ------------
          TOTAL SHAREHOLDERS' EQUITY (DEFICIT)..............   (32,201,741)
                                                              ------------
                                                              $ 17,972,368
                                                              ============
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                      F-14
<PAGE>   106
 
                                 CELCORE, INC.
 
                            STATEMENTS OF OPERATIONS
 
                 NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1997
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                  1996            1997
                                                              ------------    ------------
<S>                                                           <C>             <C>
Net revenues (notes 5 and 6)................................  $  2,755,992    $  9,485,096
Cost of revenues............................................       918,568       5,719,315
                                                              ------------    ------------
  Gross profit..............................................     1,837,424       3,765,781
                                                              ------------    ------------
Operating expenses:
  Research and development..................................     4,764,698       6,931,944
  Sales and marketing.......................................     2,882,354       4,518,004
  General and administrative................................     4,560,438       4,669,148
                                                              ------------    ------------
                                                                12,207,490      16,119,096
                                                              ------------    ------------
  Operating loss............................................   (10,370,066)    (12,353,315)
Other income (expense), net.................................       342,102         (24,320)
                                                              ------------    ------------
  Net loss..................................................  $(10,027,964)   $(12,377,635)
                                                              ============    ============
  Net loss per common share.................................  $      (1.85)   $      (2.26)
                                                              ============    ============
  Weighted average common shares outstanding................     5,500,238       5,532,839
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                      F-15
<PAGE>   107
 
                                 CELCORE, INC.
 
                            STATEMENTS OF CASH FLOWS
 
                 NINE MONTHS ENDED SEPTEMBER 30, 1996 AND 1997
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                  1996            1997
                                                              ------------    ------------
<S>                                                           <C>             <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss..................................................  $(10,027,964)   $(12,377,635)
  Adjustments to reconcile net loss to net cash used in
     operating activities:
     Depreciation and amortization..........................       499,566       1,034,123
     Loss on disposal of equipment..........................        26,812         100,085
     Changes in operating assets and liabilities:
       Accounts receivable..................................     1,812,584      (2,388,739)
       Finance receivables..................................            --      (1,253,785)
       Inventories..........................................    (1,031,549)     (1,863,183)
       Prepaids and other assets............................      (148,592)       (375,023)
       Accounts payable.....................................      (728,601)      3,726,811
       Accrued expenses and other liabilities...............       719,887       1,320,490
       Unearned revenue.....................................      (326,922)        378,929
                                                              ------------    ------------
          NET CASH USED IN OPERATING ACTIVITIES.............    (9,204,779)    (11,697,927)
                                                              ------------    ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of furniture and equipment......................    (2,238,870)     (1,847,795)
  Proceeds from disposal of equipment.......................        19,974              --
  Purchase of treasury bill.................................            --      (2,507,908)
  Proceeds from sale of treasury bill.......................            --       2,520,000
                                                              ------------    ------------
          NET CASH USED IN INVESTING ACTIVITIES.............    (2,218,896)     (1,835,703)
                                                              ------------    ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from sale of stock...............................    15,828,351          90,038
  Increase in short-term debt...............................            --         450,000
  Proceeds from issuance of long-term debt..................       995,000       2,000,000
  Principal payments on long-term debt......................       (82,917)       (443,194)
                                                              ------------    ------------
          NET CASH PROVIDED BY FINANCING ACTIVITIES.........    16,740,434       2,096,844
                                                              ------------    ------------
Net increase (decrease) in cash and cash equivalents........     5,316,759     (11,436,786)
Cash and cash equivalents at beginning of period............    14,467,858      12,056,065
                                                              ------------    ------------
Cash and cash equivalents at end of period..................  $ 19,784,617    $    619,279
                                                              ============    ============
Supplemental disclosure:
  Interest paid for 1997 and 1996 was $162,733 and $42,375,
     respectively.
  A capital lease obligation of $20,740 was incurred in
     1996.
</TABLE>
 
See accompanying Notes to Financial Statements.
 
                                      F-16
<PAGE>   108
 
                                 CELCORE, INC.
 
                         NOTES TO FINANCIAL STATEMENTS
                                  (UNAUDITED)
 
(1) DESCRIPTION OF THE BUSINESS
 
     The accompanying unaudited financial statements reflect, in the opinion of
management, all adjustments necessary to present fairly the Company's financial
position, results of operations and cash flows. Such adjustments are of a
recurring nature unless otherwise disclosed herein. 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 rules and regulations promulgated by the Securities and
Exchange Commission. However, the Company believes that the disclosures
contained herein are adequate to make information presented not misleading. Nine
month financial results may not be indicative of annual financial results.
 
     These unaudited financial statements and notes should be read in
conjunction with the audited financial statements and accompanying notes.
 
     The Company designs, assembles and installs cost-effective wireless
telecommunications systems for cellular, PCS and wireless local loop
applications in low teledensity markets. The Company's "Target Markets" are
rural locations and areas in developing countries with low teledensities and
where wireline or traditional wireless infrastructure is not readily available
or economically feasible.
 
     Since inception of operations (March 1993), the Company has not generated
revenues from operations sufficient to cover its operating expenses. The
activities of the Company continue to require significant amounts of working
capital to finance its operations. The Company has not raised additional capital
to support operations during 1997. The Company will require additional cash
infusions until such time as operations become self-sustaining.
 
(2) FINANCE RECEIVABLES
 
     The Company began extending long-term credit in 1997 to certain of its
customers at interest rates commensurate with the credit and prepayment risks
involved. At September 30, 1997, total finance receivables were $1,253,785.
Aggregate maturities of finance receivables for each twelve month period
subsequent to September 30, 1997, are $614,989 and $638,796 in 1998 and 1999,
respectively.
 
(3) INVENTORIES
 
     Inventories at September 30, 1997 consisted of the following:
 
<TABLE>
<S>                                                        <C>
Raw materials............................................  $  542,453
Finished goods...........................................   5,086,953
                                                           ----------
                                                           $5,629,406
                                                           ==========
</TABLE>
 
(4) LONG-TERM DEBT
 
     As of September 30, 1997, the Company had outstanding borrowings of
$450,000 under a working capital line and had utilized $375,000 to collateralize
a standby letter of credit. Interest on the outstanding borrowings are at prime
plus 1 and  1/2%. Additionally, the Company had outstanding borrowings of
$2,385,972 under a term loan. This term loan bears interest at prime plus 1 and
 1/2%. All of the borrowings are secured by all of the assets of the Company. As
of September 30, 1997, the Company was in default of certain financial covenants
contained in the term loan agreement and has not repaid the outstanding line of
credit balance which expired in August 1997. As a result, all outstanding
borrowings have been classified as current at September 30, 1997. (See note 7)
 
                                      F-17
<PAGE>   109
 
                                 CELCORE, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     In the fourth quarter of 1997, the Company entered into a $10,000,000
revolving credit agreement with DSC Communications Corporation (DSC) to fund
working capital requirements. Borrowings under the Agreement will be unsecured,
bear interest at 11.5% per annum and will mature on January 15, 1998. At October
31, 1997, the Company had borrowed $4,400,000 under the revolving credit
agreement. (See note 7)
 
(5) SIGNIFICANT CUSTOMERS
 
     The Company's net revenues and trade accounts receivable are concentrated
among a small number of customers. For the nine months ended September 30, 1997,
sales to eight customers aggregated $8,492,173 representing approximately 90% of
the Company's total net revenues. For the nine months ended September 30, 1996,
sales to eight customers aggregated $1,984,651 representing approximately 72% of
the Company's total net revenues.
 
     For the nine months ended September 30, 1997, net revenues of approximately
$5.1 million were attributable to two customers located in South America.
 
(6) RELATED PARTY TRANSACTION
 
     During the third quarter of 1997, CELCORE recorded an approximate $250,000
special sales allowance provision related to the expected return of certain
equipment with an original selling price of approximately $764,000. The
equipment was sold in 1997 to a customer who is an affiliate of a 11.05% owner
of the Company's Capital Stock.
 
(7) SUBSEQUENT EVENT
 
     In October 1997, the Company entered into a merger agreement with DSC. The
merger, valued at approximately $167,000,000 (including transaction costs), will
be consummated with the issuance of DSC common stock in exchange for all the
outstanding common and preferred shares of the Company. DSC will assume
substantially all of the Company's outstanding stock options. The merger is
subject to a number of items including governmental approval and should be
completed prior to the end of 1997.
 
     Should the merger be consummated, the Company's short-term and long-term
cash requirements would be funded by DSC. It is anticipated that DSC would
advance the Company the necessary funds to repay all outstanding borrowings with
its bank. However, if the merger is not consummated, it would be necessary for
the Company to find alternative financing, which may include extending terms
with its bank, a debt or equity offering or other lending sources. There can be
no assurance that the Company would be able to raise the necessary funds to
sustain future operations.
 
(8) COMMITMENTS AND CONTINGENCIES
 
     The Company is a party to routine legal proceedings incidental to its
business. The Company does not believe the ultimate resolution of these legal
proceedings will have a material adverse effect on its financial position and
results of operations.
 
                                      F-18
<PAGE>   110
 
                                   APPENDIX A
 
                                 AGREEMENT AND
                                 PLAN OF MERGER
<PAGE>   111
 
================================================================================
 
                          AGREEMENT AND PLAN OF MERGER
 
                                     AMONG
 
                        DSC COMMUNICATIONS CORPORATION,
 
                             CI ACQUISITION COMPANY
 
                                      AND
 
                                 CELCORE, INC.
 
                             DATED OCTOBER 29, 1997
 
================================================================================
 
                                       A-1
<PAGE>   112
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
    SECTION                                                                     PAGE
    -------                                                                     ----
<S>               <C>                                                           <C>
ARTICLE I  THE MERGER
  SECTION 1.01.   The Merger..................................................   A-5
  SECTION 1.02.   Effective Time; Closing.....................................   A-5
  SECTION 1.03.   Effect of the Merger........................................   A-5
  SECTION 1.04.   Certificate of Incorporation; Bylaws........................   A-6
  SECTION 1.05.   Directors and Officers......................................   A-6
ARTICLE II  CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES
  SECTION 2.01.   Conversion of Securities....................................   A-6
  SECTION 2.02.   Exchange of Certificates....................................   A-7
  SECTION 2.03.   Stock Transfer Books........................................   A-9
  SECTION 2.04.   Stock Options...............................................   A-9
  SECTION 2.05.   Escrow Approval.............................................  A-10
  SECTION 2.06.   Appraisal Rights............................................  A-10
ARTICLE III  REPRESENTATIONS AND WARRANTIES OF THE TARGET
  SECTION 3.01.   Corporate Organization and Qualification; Subsidiaries......  A-11
  SECTION 3.02.   Certificate of Incorporation and Bylaws.....................  A-11
  SECTION 3.03.   Capitalization..............................................  A-11
  SECTION 3.04.   Authority Relative to This Agreement........................  A-12
  SECTION 3.05.   No Conflict; Required Filings and Consents..................  A-12
  SECTION 3.06.   Permits; Compliance.........................................  A-12
  SECTION 3.07.   Financial Statements; Books and Records.....................  A-13
  SECTION 3.08.   Absence of Certain Changes or Events........................  A-13
  SECTION 3.09.   Absence of Litigation.......................................  A-13
  SECTION 3.10.   Employee Benefits...........................................  A-14
  SECTION 3.11.   Labor Matters...............................................  A-17
  SECTION 3.12.   Intellectual Property Assets................................  A-17
  SECTION 3.13.   Taxes.......................................................  A-20
  SECTION 3.14.   Environmental Matters.......................................  A-20
  SECTION 3.15.   Target Products; Regulation.................................  A-21
  SECTION 3.16.   Opinion of Financial Advisor................................  A-21
  SECTION 3.17.   Vote Required...............................................  A-21
  SECTION 3.18.   Brokers.....................................................  A-21
  SECTION 3.19.   Tangible Property...........................................  A-21
  SECTION 3.20.   Material Contracts..........................................  A-22
  SECTION 3.21.   Accounting and Tax Matters..................................  A-23
  SECTION 3.22.   Certain Business Practices..................................  A-24
  SECTION 3.23.   Real Property and Leases....................................  A-24
  SECTION 3.24.   Insurance...................................................  A-24
  SECTION 3.25.   Indemnification Claims......................................  A-24
  SECTION 3.26.   Board Recommendation........................................  A-24
  SECTION 3.27.   Change in Control...........................................  A-25
  SECTION 3.28.   Payments Resulting from Mergers.............................  A-25
  SECTION 3.29.   State Takeover Statutes.....................................  A-25
</TABLE>
 
                                       A-2
<PAGE>   113
<TABLE>
<CAPTION>
    SECTION                                                                     PAGE
    -------                                                                     ----
<S>               <C>                                                           <C>
ARTICLE IV  REPRESENTATIONS AND WARRANTIES OF PARENT AND PARENT SUB
  SECTION 4.01.   Corporate Organization and Qualification....................  A-25
  SECTION 4.02.   Certificate of Incorporation and Bylaws.....................  A-25
  SECTION 4.03.   Capitalization..............................................  A-26
  SECTION 4.04.   Authority Relative to This Agreement........................  A-26
  SECTION 4.05.   No Conflict; Required Filings and Consents..................  A-26
  SECTION 4.06.   Ownership of Parent Sub; No Prior Activities................  A-27
  SECTION 4.07.   Parent Stock................................................  A-27
  SECTION 4.08.   Parent Documents............................................  A-27
  SECTION 4.09.   Legal Proceedings...........................................  A-27
  SECTION 4.10.   Subsequent Events...........................................  A-27
  SECTION 4.11.   Certain Representations.....................................  A-27
ARTICLE V  CONDUCT OF BUSINESS PENDING THE MERGER
  SECTION 5.01.   Conduct of Business by the Target Pending the Merger........  A-28
ARTICLE VI  ADDITIONAL AGREEMENTS
  SECTION 6.01.   Registration Statement; Proxy Statement.....................  A-29
  SECTION 6.02.   Target's Stockholder Meeting................................  A-31
  SECTION 6.03.   Appropriate Action; Consents; Filings.......................  A-31
  SECTION 6.04.   Access to Information; Confidentiality......................  A-32
  SECTION 6.05.   No Solicitation.............................................  A-32
  SECTION 6.06.   Obligations of Parent Sub...................................  A-33
  SECTION 6.07.   Public Announcements........................................  A-33
  SECTION 6.08.   Employee Matters............................................  A-33
  SECTION 6.09.   Further Action..............................................  A-33
  SECTION 6.10.   Registration on Form S-8....................................  A-33
  SECTION 6.11.   Tax-Free Reorganization.....................................  A-33
  SECTION 6.12.   Unaudited Financial Information.............................  A-33
  SECTION 6.13.   Letters of Accountants......................................  A-33
  SECTION 6.14.   Update Disclosure; Breaches.................................  A-33
  SECTION 6.15.   Affiliate Agreements........................................  A-34
  SECTION 6.16.   Voting Agreements...........................................  A-34
  SECTION 6.17.   DSC Special Celcore Incentive Plan..........................  A-34
ARTICLE VII  CONDITIONS PRECEDENT TO THE MERGER
  SECTION 7.01.   Conditions to the Obligations of Each Party.................  A-34
  SECTION 7.02.   Conditions to the Obligations of Parent and Parent Sub......  A-35
  SECTION 7.03.   Conditions to the Obligations of Target.....................  A-36
ARTICLE VIII  TERMINATION
  SECTION 8.01.   Termination.................................................  A-37
  SECTION 8.02.   Fees and Expenses...........................................  A-37
  SECTION 8.03.   Amendment...................................................  A-38
  SECTION 8.04.   Waiver......................................................  A-38
ARTICLE IX  ESCROW AND INDEMNIFICATION
  SECTION 9.01.   Survival of Representations and Warranties..................  A-39
  SECTION 9.02.   Parent Escrow Arrangements..................................  A-39
  SECTION 9.03.   Representative Escrow Arrangements..........................  A-42
</TABLE>
 
                                       A-3
<PAGE>   114
<TABLE>
<CAPTION>
    SECTION                                                                     PAGE
    -------                                                                     ----
<S>               <C>                                                           <C>
ARTICLE X  GENERAL PROVISIONS
  SECTION
     10.01.       Expenses....................................................  A-44
  SECTION
     10.02.       Confidentiality.............................................  A-44
  SECTION
     10.03.       Notices.....................................................  A-44
  SECTION
     10.04.       Further Assurances..........................................  A-45
  SECTION
     10.05.       Entire Agreement and Modification...........................  A-45
  SECTION
     10.06.       Target Disclosure Schedule..................................  A-45
  SECTION
     10.07.       Assignments, Successors, and No Third-Party Rights..........  A-45
  SECTION
     10.08.       Severability................................................  A-45
  SECTION
     10.09.       Section Headings, Construction..............................  A-46
  SECTION
     10.10.       Time of Essence.............................................  A-46
  SECTION
     10.11.       Incorporation of Schedules..................................  A-46
  SECTION
     10.12.       Specific Performance........................................  A-46
  SECTION
     10.13.       Waiver of Jury Trial........................................  A-46
  SECTION
     10.14.       Governing Law...............................................  A-46
  SECTION
     10.15.       Certain Definitions.........................................  A-46
  SECTION
     10.16.       Counterparts................................................  A-48
 
EXHIBITS:
  Exhibit A       -- Certificate of Incorporation
  Exhibit B       -- Affiliate Agreement
  Exhibit C       -- Voting Agreement
  Exhibit D       -- Tax Opinion of Baker & McKenzie
  Exhibit E       -- Tax Opinion of Powell, Goldstein, Frazer & Murphy LLP
  Exhibit F       -- Opinion of Powell, Goldstein, Frazer & Murphy LLP
  Exhibit G       -- Opinion of Baker & McKenzie
  Exhibit H       -- DSC Special Celcore Incentive Plan
</TABLE>
 
                                       A-4
<PAGE>   115
 
     This AGREEMENT AND PLAN OF MERGER, dated as of October 29, 1997 (this
"Agreement"), by and among DSC Communications Corporation, a Delaware
corporation ("Parent"), CI Acquisition Company, a Delaware corporation and a
direct, wholly owned subsidiary of Parent ("Parent Sub"), and Celcore, Inc., a
Delaware corporation (the "Target").
 
     WHEREAS, Parent Sub, upon the terms and subject to the conditions of this
Agreement and in accordance with the Delaware General Corporation Law ("Delaware
Law"), will merge with and into Target (the "Merger") and as a result of the
Merger, the separate corporate existence of Parent Sub shall cease and Target
shall continue as the surviving corporation of the Merger (the "Surviving
Corporation");
 
     WHEREAS, the Board of Directors of Target (i) has determined that the
Merger is in the best interests of Target and its stockholders (the "Target
Stockholders") and unanimously approved and adopted this Agreement and the
transactions contemplated hereby (the "Transactions") and (ii) has unanimously
recommended approval and adoption of this Agreement and approval of the Merger
by, and directed that this Agreement and the Merger be submitted to a vote of,
the Target Stockholders;
 
     WHEREAS, the Boards of Directors of Parent and Parent Sub have determined
that the Merger is in the best interests of Parent and Parent Sub and their
stockholders and have unanimously approved and adopted this Agreement and the
Transactions; and
 
     WHEREAS, for federal income tax purposes, it is intended that the Merger
shall qualify as a tax-free reorganization under the provisions of Section
368(a) of the United States Internal Revenue Code of 1986, as amended (the
"Code").
 
     NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements herein contained, and intending to be legally bound hereby,
Parent, Parent Sub and Target hereby agree as follows:
 
                                   ARTICLE I
 
                                   THE MERGER
 
     SECTION 1.01. The Merger. Upon the terms and subject to the conditions set
forth in this Agreement and in accordance with Delaware Law, at the Effective
Time (as defined below), Parent Sub shall be merged with and into Target. As a
result of the Merger, the outstanding shares of capital stock of Parent Sub and
Target shall be converted or canceled in the manner provided in Article II of
this Agreement, the separate corporate existence of Parent Sub shall cease, and
Target will be the surviving corporation in the Merger and shall become a
subsidiary of Parent. The name of the Surviving Corporation shall be
DSC/Celcore, Inc.
 
     SECTION 1.02. Effective Time; Closing. As promptly as practicable on or
before December 1, 1997, and in no event later than the first business day
following the satisfaction or, if permissible, waiver of the conditions set
forth in Article VII (or such other date as may be agreed in writing by each of
the parties hereto), the parties hereto shall cause the Merger to be consummated
by filing a certificate of merger (the "Certificate of Merger") with the
Secretary of State of the State of Delaware (the "Secretary") in such form as is
required by, and executed in accordance with the relevant provisions of,
Delaware Law. The term "Effective Time" means the date and time of the filing of
the Certificate of Merger with the Secretary (or such later time as may be
agreed in writing by each of the parties hereto and specified in the Certificate
of Merger). Immediately prior to the filing of the Certificate of Merger, a
closing (the "Closing") will be held at the Dallas, Texas offices of Baker &
McKenzie (the "Closing Date") (or such other place as the parties may agree).
 
     SECTION 1.03. Effect of the Merger. At the Effective Time, the effect of
the Merger shall be as provided in the applicable provisions of Delaware Law.
Without limiting the generality of the foregoing, and subject thereto, at the
Effective Time all the rights, privileges, powers and franchises (of a public as
well as of a private nature) of Target and Parent Sub and all property (real,
personal and mixed) of Target and Parent Sub and all debts due to either Target
or Parent Sub on any account, including subscriptions to shares, and every other
interest of or belonging to or due to each of Target and Parent Sub shall vest
in the Surviving
 
                                       A-5
<PAGE>   116
 
Corporation, and all debts, liabilities and duties of each of Target and Parent
Sub shall become the debts, liabilities, obligations and duties of the Surviving
Corporation and may be enforced against the Surviving Corporation to the same
extent as if such debts, liabilities, obligations and duties had been incurred
or contracted by the Surviving Corporation. The title to any real estate or any
interest therein vested, by deed or otherwise, in Target or Parent Sub shall not
revert or in any way become impaired by reason of the Merger, and all rights of
creditors and all liens upon any property of Target or Parent Sub shall be
preserved unimpaired following the Merger.
 
     SECTION 1.04. Certificate of Incorporation; Bylaws. (a) At the Effective
Time, the certificate of incorporation of Target, as in effect immediately prior
to the Effective Time, shall be amended as of the Effective Time by operation of
this Agreement and by virtue of the Merger without any further action by the
stockholders or directors of the Surviving Corporation to read in its entirety
as set forth in Exhibit A attached hereto.
 
     (b) At the Effective Time, the bylaws of Parent Sub, as in effect
immediately prior to the Effective Time, shall be the bylaws of the Surviving
Corporation until thereafter amended as provided by Delaware Law, the
certificate of incorporation of the Surviving Corporation and such bylaws.
 
     SECTION 1.05. Directors and Officers. The directors of Parent Sub
immediately prior to the Effective Time shall be the initial directors of the
Surviving Corporation, each to hold office in accordance with the certificate of
incorporation and bylaws of the Surviving Corporation until a successor is
elected or appointed and has qualified or until the earliest of such director's
death, resignation, removal or disqualification, and the officers of Parent Sub
immediately prior to the Effective Time shall be the initial officers of the
Surviving Corporation, in each case until their respective successors are duly
elected or appointed and qualified, or as otherwise provided in the bylaws of
the Surviving Corporation.
 
                                   ARTICLE II
 
               CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES
 
     SECTION 2.01. Conversion of Securities. At the Effective Time, by virtue of
the Merger and without any action on the part of Parent Sub, Target or the
holders of any of the following securities:
 
          (a) Each share of common stock, $0.10 par value per share ("Target
     Common Stock"), of Target issued and outstanding immediately prior to the
     Effective Time (other than Dissenting Shares (as defined below)) shall be
     converted into the right to receive that number of shares of common stock,
     par value $0.01 per share (including any preferred stock purchase rights
     issuable pursuant to the Rights Agreement, dated April 25, 1996 between
     Parent and KeyCorp Shareholder Services, Inc. as rights agent, or any other
     purchase right issued in substitution thereof, "Parent Common Stock"), of
     Parent equal to the Exchange Ratio. The "Exchange Ratio" shall be a
     fraction, the numerator of which is eight (8) and the denominator of which
     is the Average Trading Price of the Parent Common Stock; provided, however,
     in the event the Average Trading Price is twenty-five dollars ($25.00) or
     less then the Exchange Ratio shall be .32. The term "Average Trading Price"
     shall mean the average of the reported last sale prices of a share of
     Parent Common Stock on the NASDAQ National Market ("Nasdaq") as reported by
     Nasdaq for the 10 consecutive trading days ending immediately preceding the
     second trading day before the meeting of Target Stockholders (as defined
     below) called for the purpose of voting on the Merger.
 
          (b) Each share of Series A Convertible Preferred Stock, par value
     $0.10 per share ("Series A Preferred Stock"), Series B Convertible
     Preferred Stock, par value $0.10 per share ("Series B Preferred Stock"),
     Series C Convertible Preferred Stock, par value $0.10 per share ("Series C
     Preferred Stock"), and Series D Convertible Preferred Stock, par value
     $0.10 per share ("Series D Preferred Stock"), of Target (collectively, the
     "Target Preferred Stock") issued and outstanding immediately prior to the
     Effective Time (other than Dissenting Shares) shall be converted into the
     right to receive that number of shares of Parent Common Stock equal to the
     Exchange Ratio.
 
                                       A-6
<PAGE>   117
 
          (c) From and after the Effective Time, all shares of Target Common
     Stock and Target Preferred Stock (together referred to as the "Target
     Stock") (other than Dissenting Shares) shall no longer be outstanding and
     shall automatically be canceled and retired and shall cease to exist, and
     each certificate previously representing any such shares (other than
     Dissenting Shares) shall thereafter represent the right to receive, subject
     to Section 2.02(h), a certificate representing the shares of Parent Common
     Stock into which such Target Stock was converted in the Merger. Subject to
     Section 2.02(h), certificates previously representing shares of Target
     Stock (other than Dissenting Shares) shall be exchanged for certificates
     representing whole shares of Parent Common Stock issued in consideration
     therefor upon the surrender of such certificates in accordance with the
     provisions of Section 2.02, without interest. All arithmetic calculations
     of conversions pursuant to this Section 2.01 shall be made through the
     fourth decimal place (i.e., to the closest ten-thousandth). No fractional
     share of Parent Common Stock shall be issued, and, in lieu thereof, a cash
     payment shall be made pursuant to Section 2.02(e) hereof. In any event, if
     between the date of this Agreement and the Effective Time, the outstanding
     shares of Parent Common Stock, Target Common Stock or Target Preferred
     Stock shall have been changed into a different number of shares or a
     different class, by reason of any stock dividend, subdivision,
     reclassification, recapitalization, split, combination or exchange of
     shares, the Exchange Ratio shall be correspondingly adjusted to reflect
     such stock dividend, subdivision, reclassification, recapitalization,
     split, combination or exchange of shares.
 
          (d) Any shares of Target Stock held in the treasury of Target and any
     shares of Target Stock owned by Parent or any direct or indirect wholly
     owned subsidiary of Parent or of Target immediately prior to the Effective
     Time shall be canceled and extinguished without any conversion thereof and
     no payment shall be made with respect thereto.
 
          (e) Each share of common stock, par value $0.01 per share, of Parent
     Sub ("Parent Sub Common Stock") issued and outstanding immediately prior to
     the Effective Time shall be converted into and exchanged for one newly and
     validly issued, fully paid and non-assessable share of common stock of the
     Surviving Corporation.
 
     SECTION 2.02. Exchange of Certificates. (a) Exchange Agent. As of or before
the Effective Time, Parent shall deposit, or shall cause to be deposited, with a
bank or trust company organized under the laws of, and having an office in, any
state of the United States and designated by Parent (the "Exchange Agent"), for
the benefit of the holders of shares of Target Stock and, for exchange through
the Exchange Agent in accordance with this Article II, (i) certificates
representing the whole shares of Parent Common Stock issuable pursuant to
Section 2.01 in exchange for outstanding shares of Target Stock and (ii) cash in
an amount sufficient to permit payment of cash payable in lieu of fractional
shares pursuant to Section 2.02(e) (such certificates for shares of Parent
Common Stock, together with any dividends or distributions with respect thereto,
and cash, being hereinafter referred to as the "Exchange Fund"). Subject to
Section 2.02(h), the Exchange Agent shall, pursuant to irrevocable instructions
from Parent, deliver the Parent Common Stock and cash contemplated to be issued
pursuant to Section 2.01 out of the Exchange Fund.
 
     (b) Exchange Procedures. Promptly after the Effective Time and subject to
Section 2.02(h), Parent shall instruct the Exchange Agent to mail to each holder
of record of a certificate or certificates which immediately prior to the
Effective Time represented outstanding shares of Target Stock (the
"Certificates") (i) a letter of transmittal (which shall be in customary form
and specify that delivery shall be effected, and risk of loss and title to the
Certificates shall pass, only upon proper delivery of the Certificates to the
Exchange Agent) and (ii) instructions for exchanging the Certificates for
certificates representing shares of Parent Common Stock. Upon surrender of a
Certificate for cancellation to the Exchange Agent together with such duly
executed letter of transmittal and such other documents as may be required
pursuant to such instructions, the holder of such Certificate shall be entitled
to receive in exchange therefor a certificate representing that number of whole
shares of Parent Common Stock which such holder has the right to receive in
respect of the shares of Target Stock formerly represented by such Certificates,
less a number of shares of Parent Common Stock constituting such holder's
proportionate interest of the shares held in escrow pursuant to Section 2.02(h)
hereof, as set forth in Schedule 2.01, together with cash in lieu of fractional
shares (rounded to
 
                                       A-7
<PAGE>   118
 
the nearest whole share) of Parent Common Stock to which such holder is entitled
pursuant to Section 2.02(e) and any dividends or other distributions to which
such holder is entitled pursuant to Section 2.02(c). The surrendered
Certificates shall then be marked canceled. In addition, the holder of such
Certificate subsequently may receive shares of Parent Common Stock and other
property in accordance with the escrow provisions of Article IX. In the event of
a transfer of ownership of shares of Target Stock which is not registered in the
transfer records of Target, a certificate representing the proper number of
shares of Parent Common Stock may be issued to a transferee if the Certificates
representing such shares of Target Stock are presented to the Exchange Agent,
accompanied by all documents required to evidence and effect such transfer and
by evidence that any applicable stock transfer taxes have been paid. Until
surrendered as contemplated by this Section 2.02, each Certificate shall be
deemed at any time after the Effective Time to represent only the right to
receive upon such surrender the certificate representing shares of Parent Common
Stock, cash in lieu of any fractional shares of Parent Common Stock to which
such holder is entitled pursuant to Section 2.02(e) and any dividends or other
distributions to which such holder is entitled pursuant to Section 2.02(c).
 
     (c) Distributions with Respect to Unexchanged Shares of Parent Common
Stock. No dividends or other distributions declared or made after the Effective
Time with respect to Parent Common Stock with a record date after the Effective
Time shall be paid to the holder of any unsurrendered Certificate with respect
to the shares of Parent Common Stock evidenced thereby until the holder of such
Certificate shall surrender such Certificate. Subject to the effect of
applicable laws, following surrender of any such Certificate, there shall be
paid to the holder of such Certificate, in addition to the shares of Parent
Common Stock as provided in Section 2.02(b), without interest, the amount of
dividends or other distributions with a record date after the Effective Time
theretofore paid with respect to the whole shares of Parent Common Stock
evidenced by such Certificate. There shall be paid to the holder of the
certificates representing whole shares of Parent Common Stock issued in exchange
therefor, without interest: (i) promptly, the amount of cash payable with
respect to a fractional share of Parent Common Stock to which such holder is
entitled pursuant to Section 2.02(e) and the amount of dividends or other
distributions with a record date after the Effective Time theretofore paid with
respect to such whole shares of Parent Common Stock, subject to the escrow
provisions of Article IX hereof, and (ii) at the appropriate payment date, the
amount of dividends or other distributions, with a record date after the
Effective Time but prior to surrender and a payment date occurring after
surrender, payable with respect to such whole shares of Parent Common Stock,
subject to the escrow provisions of Article IX hereof.
 
     (d) No Further Rights in Target Stock. All shares of Parent Common Stock
issued or paid upon conversion of the shares of Target Stock in accordance with
the terms hereof (including any cash paid or other distributions pursuant to
Sections 2.02(c) and (e)) shall be deemed to have been issued or paid in full
satisfaction of all rights pertaining to such shares of Target Stock.
 
     (e) No Fractional Shares. No certificates or scrip evidencing fractional
shares of Parent Common Stock shall be issued upon the surrender for exchange of
Certificates, but in lieu thereof each Target Stockholder who would otherwise be
entitled to receive a fraction of a share of Parent Common Stock, after
aggregating all shares of Parent Common Stock which such holder would be
entitled to receive under Section 2.01, shall receive an amount equal to the
Average Trading Price multiplied by the fraction of a share of Parent Common
Stock to which such holder would otherwise be entitled, without interest. Such
payment in lieu of fractional shares shall be administered by the Exchange Agent
pursuant to the procedures set forth in Section 2.02(b).
 
     (f) Termination of Exchange Fund. Any portion of the Exchange Fund which
remains undistributed to the holders of Target Stock for one year after the
Effective Time shall be delivered to Parent, upon demand, and, subject to
Section 2.02(g), any holders of Target Stock who have not theretofore complied
with this Article II shall thereafter look only to Parent for the shares of
Parent Common Stock, any cash in lieu of fractional shares of Parent Common
Stock to which they are entitled pursuant to Section 2.02(e) and any dividends
or other distributions with respect to Parent Common Stock to which they are
entitled pursuant to Section 2.02(c).
 
     (g) No Liability. Neither Parent nor the Surviving Corporation shall be
liable to any Target Stockholders for any shares of Parent Common Stock or cash
(or dividends or distributions with respect thereto)
 
                                       A-8
<PAGE>   119
 
delivered to a public official following termination of the Exchange Fund
pursuant to any applicable abandoned property, escheat or similar Law.
 
     (h) Escrow. Notwithstanding the foregoing, at the Effective Time, five
percent (5%) of the shares (rounded to the nearest whole share) of Parent Common
Stock issuable pursuant to Section 2.01 hereof to Target Stockholders (including
holders of Target Options) as a result of the Merger shall be segregated and
deducted therefrom and established as an escrow amount (the "Parent Escrow
Amount"). In addition, at the Effective Time, three hundred and thirty-three
one-thousandths percent (.333%) of the shares (rounded to the nearest whole
share) of Parent Common Stock issuable pursuant to Section 2.01 hereof to the
Target Stockholders (including holders of Target Options) as a result of the
Merger shall be segregated and deducted therefrom and established as an escrow
amount (the "Representative Escrow Amount"). The Parent Escrow Amount and the
Representative Escrow Amount shall be held in accordance with and subject to the
provisions of Article IX of this Agreement. The Parent Escrow Amount shall be
held as collateral for the indemnification obligations of the Persons who were
holders of Target Stock and Target Options immediately prior to the Effective
Time under Article IX of this Agreement. The Representative Escrow Amount shall
be held for the purpose of paying certain costs and expenses of the
Representative (as defined below) in performing his/her obligations under
Article IX.
 
     (i) Lost Certificates. If any Certificate shall have been lost, stolen or
destroyed, upon the making of an affidavit of that fact by the Person claiming
such Certificate to be lost, stolen or destroyed and, if required by the
Surviving Corporation, the posting by such Person of a bond in such reasonable
amount as the Surviving Corporation may direct as indemnity against any claim
that may be made against it with respect to such Certificate, the Exchange Agent
will issue in exchange for such lost, stolen or destroyed Certificate the shares
of Parent Common Stock (subject to Section 2.02(h)), and unpaid dividends and
distributions on shares of Parent Common Stock deliverable in respect thereof
pursuant to this Agreement.
 
     SECTION 2.03. Stock Transfer Books. At the Effective Time, the stock
transfer books of Target shall be closed and there shall be no further
registration of transfers of shares of Target Stock thereafter on the records of
Target. On or after the Effective Time, any Certificates presented to the
Exchange Agent or Parent for any reason shall be converted into the shares of
Parent Common Stock (subject to Section 2.02(h)), any cash in lieu of fractional
shares of Parent Common Stock to which they are entitled pursuant to Section
2.02(e) and any dividends or other distributions to which they are entitled
pursuant to Section 2.02(c) in accordance with the terms of this Agreement.
 
     SECTION 2.04. Stock Options. (a) All options (the "Target Options") under
the Target's 1995 Stock Option Plan and 1996 Stock Incentive Plan (together, the
"Target Stock Option Plan"), outstanding at the Effective Time, whether or not
exercisable, whether or not vested, and whether or not performance-based, shall
remain outstanding following the Effective Time, except that, in accordance with
the amendments to the Target Options for Messrs. Berger, Foley, Gonzalez and
Rosen, each of which is dated January 30, 1997 under the Target Stock Option
Plan, the Target Options for Messrs. Berger, Foley, Gonzales and Rosen shall be
fully exercisable immediately prior to the Effective Time. At the Effective
Time, the Target Options shall, by virtue of the Merger and without any further
action on the part of the holders thereof or the Target, be assumed by Parent.
From and after the Effective Time, all references to the Target in the Target
Stock Option Plan and the applicable stock option agreements issued thereunder
shall be deemed to refer to Parent, which shall have assumed the Target Stock
Option Plan as of the Effective Time by virtue of this Agreement and without any
further action. Each Target Option assumed by Parent (each a "Substitute
Option") shall be exercisable upon the same terms and conditions as under the
applicable Target Stock Option Plan and the applicable option agreement issued
thereunder, except that (i) each such Target Option shall be exercisable for,
and represent the right to acquire, that whole number of shares of Parent Common
Stock (rounded up or down to the nearest whole share) equal to the number of
shares of Target Common Stock subject to such Target Option multiplied by the
Exchange Ratio; (ii) the option price per share of Parent Common Stock shall be
an amount equal to the option price per share of Target Common Stock subject to
such Target Option in effect immediately prior to the Effective Time divided by
the Exchange Ratio (the option price per share, as so determined, being rounded
upward to the nearest full cent); and (iii) with respect to any Target Option
which is performance-based, the performance targets shall be adjusted following
the Effective Time in the good faith
 
                                       A-9
<PAGE>   120
 
judgment of the Board of Directors of Parent to fairly reflect the impact, if
any, of the Transactions; and (iv) in the case of any Substitute Option that
remains unexercised as of the termination of the Escrow Period (as defined
below), the number of shares of Parent Common Stock issuable upon the exercise
of such Substitute Options shall be reduced in proportion to any reduction in
the number of shares of Parent Common Stock received by holders of the
Substitute Options assumed by Parent which are exercised prior to the Expiration
Date as a result of any distribution made to Parent pursuant to Article IX of
this Agreement. No payment shall be made for fractional interests of Parent
Common Stock represented by the Substitute Options.
 
     (b) As soon as practicable after the Effective Time, Parent shall deliver
to each holder of an outstanding Target Option an appropriate notice setting
forth such holder's rights pursuant thereto and such Target Option shall
continue in effect on the same terms and conditions (including any antidilution
provisions, and subject to the adjustments required by this Section 2.04 after
giving effect to the Merger). Parent shall comply with the terms of all such
Target Options and ensure, to the extent required by, and subject to the
provisions of, the Target Stock Option Plan that Target Options which qualified
as incentive stock options under Section 422 of the Code (as defined below)
prior to the Effective Time continue to qualify as incentive stock options after
the Effective Time. Parent shall take all corporate action necessary to reserve
for issuance a sufficient number of shares of Parent Common Stock for delivery
upon exercise of Substitute Options pursuant to the terms set forth in this
Section 2.04. Following the Effective Time, the shares of Parent Common Stock
subject to Target Options will be covered by an effective registration statement
on Form S-8 (or any successor form) or another appropriate form with the
Securities and Exchange Commission ("SEC") and Parent shall use its Best Efforts
to maintain the effectiveness of such registration statement or registration
statements for so long as Substitute Options remain outstanding.
 
     SECTION 2.05. Escrow Approval. By adopting and approving this Agreement,
the Target Stockholders, except in respect of Dissenting Shares, approve the
Parent Escrow Agreement (as defined below) and the Representative Escrow
Agreement (as defined below), the appointment of the Escrow Agent to act under
the authority granted it under the Escrow Agreement and this Agreement and the
appointment of the Representative (as defined below) to act on behalf of the
Target Stockholders under the terms of the Parent Escrow Agreement and the
Representative Escrow Agreement and this Agreement. If the Representative ceases
to be the Representative for any reason, he will be replaced in accordance with
the terms of the Parent Escrow Agreement.
 
     SECTION 2.06. Appraisal Rights. Any issued and outstanding share of Target
Stock which has not been voted for the Merger and with respect to which
appraisal will have been properly demanded in accordance with Section 262 of the
Delaware Law ("Dissenting Shares") will not be converted into the right to
receive the consideration described in Section 2.01, and the holders thereof
will have only such rights as are provided in Section 262 of the Delaware Law,
unless and until the Target Stockholder withdraws such holder's demand for such
appraisal in accordance with the Delaware Law or otherwise loses such holder's
right to such appraisal. If a Target Stockholder withdraws such holder's demand
for appraisal or will otherwise lose the right to such appraisal, then, as of
the Effective Time or the occurrence of such event, whichever last occurs, such
holder's shares of Target Stock will cease to be Dissenting Shares and will be
converted into the consideration described in Section 2.01. Prior to the
Effective Time, Target will give Parent prompt notice of any written demands for
appraisal or withdrawals of demands for appraisal received by Target and, except
with the prior written consent of Parent, will not settle or offer to settle any
such demands.
 
                                      A-10
<PAGE>   121
 
                                  ARTICLE III
 
                  REPRESENTATIONS AND WARRANTIES OF THE TARGET
 
     Except as set forth in the disclosure schedule delivered by Target and
signed by Target, Parent and Parent Sub for identification prior to the
execution and delivery of this Agreement (the "Target Disclosure Schedule"),
which shall identify exceptions by specific section references, the Target
hereby represents and warrants to Parent and Parent Sub that:
 
     SECTION 3.01. Corporate Organization and Qualification; Subsidiaries. Each
of Target and Celcore International, Inc. (Delaware), a Delaware corporation,
and Celcore International, Inc. (Mauritius), a Republic of Mauritius corporation
(the "Target Subsidiaries"), is a corporation duly organized, validly existing
and in good standing under the laws of the jurisdiction of its incorporation and
has the requisite corporate power and authority to own, lease and operate its
properties and to carry on its business as it is now being conducted. Each of
Target and the Target Subsidiaries is duly qualified or licensed as a foreign
corporation to do business, and is in good standing, in each jurisdiction where
the character of the properties owned, leased or operated by it or the nature of
its business makes such qualification or licensing necessary, except for such
failures to be so qualified or licensed and in good standing that would not,
individually or in the aggregate, have a Material Adverse Effect. As used in
this Agreement, the term "Material Adverse Effect" means with respect to any
Person, any change or effect that is, or is reasonably likely to be, materially
adverse to the financial condition, business or results of operations of such
Person and its subsidiaries, taken as a whole. Other than the Target
Subsidiaries, Target does not have any subsidiaries. Neither Target nor either
Target Subsidiary owns directly or indirectly any voting equity or similar
voting interest in, or any interest convertible into or exchangeable or
exercisable for, any voting equity or similar voting interest in, any
corporation, partnership, joint venture or other business association or entity.
Target is not, and has not been within the two years immediately preceding the
date hereof, a subsidiary or division of another corporation, nor has Target
within such time owned, directly or indirectly, any shares of Parent Common
Stock.
 
     SECTION 3.02. Certificate of Incorporation and Bylaws. The Target has
heretofore furnished or made available to Parent a complete and correct copy of
its and the Target Subsidiaries' certificates of incorporation and bylaws, each
as amended to date. Neither the Target nor either of the Target Subsidiaries is
in violation of any provision of its certificate of incorporation or bylaws.
 
     SECTION 3.03. Capitalization. The authorized capital stock of the Target
consists of 50,000,000 shares of Target Common Stock and 14,000,000 shares of
Target Preferred Stock, consisting of 4,500,000 shares of Series A Preferred
Stock, 3,000,000 shares of Series B Preferred Stock, 4,000,000 shares of Series
C Preferred Stock and 2,500,000 shares of Series D Preferred Stock. As of the
date of this Agreement, (a) 5,591,250 shares of Target Common Stock and (b)
4,500,000, 3,000,000, 3,038,045.66 and 2,004,227 shares of Series A Preferred
Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred
Stock, respectively (a total of 12,542,273 shares of Target Preferred Stock),
were issued and outstanding, all of which are validly issued, fully paid and
nonassessable and not subject to preemptive rights, and (c) 2,460,250 shares of
Target Common Stock are issuable pursuant to outstanding Target Options. Each
share of Target Preferred Stock is convertible into one share of Target Common
Stock. All of the issued and outstanding shares of capital stock of the Target
Subsidiaries are held by Target and are validly issued, fully paid and
nonassessable and not subject to preemptive rights. No shares of capital stock
of the Target have been acquired by the Target that are subject to outstanding
pledges by the Target to secure the future payment of some or all of the
purchase price for such shares. Other than the Target Options, as of the date of
this Agreement, there are no options, warrants or other rights, agreements,
arrangements or commitments of any character relating to the issued or unissued
capital stock of the Target obligating the Target to issue or sell any shares of
capital stock of, or other equity interests in, the Target or the Target
Subsidiaries. Between August 31, 1997 and the date of this Agreement, no shares
of Target Common Stock have been issued by the Target, except pursuant to the
exercise of the stock options, stock incentive rights and warrants described
above that were outstanding on August 31, 1997, in each case in accordance with
their respective terms. All shares of Target Common Stock subject to issuance as
aforesaid, upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, will be duly authorized,
validly issued, fully paid and nonassessable. Other
 
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<PAGE>   122
 
than as set forth in Target's certificate of incorporation (including the Target
Preferred Stock certificates of designation, each a "Certificate of
Designation"), there are no outstanding contractual obligations of the Target to
repurchase, redeem or otherwise acquire any shares of Target Stock. Target has
not made any distributions to any Target Stockholders or participated in or
effected any issuance, exchange or retirement of shares of Target Common Stock,
or otherwise changed the equity interests of Target Stockholders, in
contemplation of effecting the Merger within the two years immediately preceding
the date hereof. Target has not reacquired during the two years immediately
preceding the date of this Agreement any shares of Target Common Stock.
 
     SECTION 3.04. Authority Relative to This Agreement. The Target has all
necessary corporate power and authority to execute and deliver this Agreement
and, with respect to the Merger, upon the approval and adoption of the Merger by
the Target Stockholders in accordance with this Agreement and Delaware Law, to
perform its obligations hereunder and to consummate the Transactions. The
execution and delivery of this Agreement by the Target and the consummation by
the Target of the Transactions have been duly and validly authorized by all
necessary corporate action and no other corporate proceedings on the part of the
Target are necessary to authorize this Agreement or to consummate the
Transactions (other than, with respect to the Merger, the approval and adoption
of this Agreement by the Target Stockholders as described in Section 3.17 and
recordation of an appropriate Certificate of Merger with the Secretary as
required by Delaware Law). This Agreement has been duly and validly executed and
delivered by the Target and, assuming the due authorization, execution and
delivery of this Agreement by Parent and Parent Sub, constitutes a legal, valid
and binding obligation of the Target, enforceable against the Target in
accordance with its terms.
 
     SECTION 3.05. No Conflict; Required Filings and Consents. (a) The execution
and delivery of this Agreement by the Target do not, and the performance of this
Agreement by the Target will not, subject to, (x) with respect to the Merger,
obtaining the requisite approval and adoption of the Merger by the Target
Stockholders in accordance with its certificate of incorporation, this Agreement
and Delaware Law, and (y) obtaining any necessary Consents from third parties
and permits from Governmental Authorities and making the filings described in
Section 3.05(b) and Section 3.05(b) of the Target Disclosure Schedule, (i)
conflict with or violate the certificate of incorporation or bylaws of the
Target or the Target Subsidiaries, (ii) conflict with or violate any Law
applicable to the Target or the Target Subsidiaries or by which any property or
asset of the Target or the Target Subsidiaries is bound or affected, or (iii)
except as specified in Section 3.20 of the Target Disclosure Schedule, result in
any Breach of or constitute a default (or an event which with notice or lapse of
time or both would become a default) under, or give to others any right of
termination, amendment, acceleration or cancellation of, or result in the
creation of a lien or other encumbrance on any property or asset of the Target
or the Target Subsidiaries or require the Consent of any third party pursuant
to, any note, bond, mortgage, indenture, Contract, license, permit, franchise or
other instrument or obligation to which the Target or the Target Subsidiaries is
a party other than with respect to breaches or defaults which would not
constitute a Material Adverse Effect.
 
     (b) The execution and delivery of this Agreement by the Target do not, and
the performance of this Agreement and the Transactions contemplated hereby by
the Target will not, require any Consent or permit of, or filing with or
notification to, any United States (federal, state or local) or foreign
government, or governmental, regulatory or administrative authority, agency or
commission or court of competent jurisdiction ("Governmental Authority"), except
(i) for applicable requirements, if any, of the Securities Exchange Act of 1934,
as amended (the "Exchange Act"), the Securities Act of 1933, as amended (the
"Securities Act"), state securities or "blue sky" laws ("Blue Sky Laws"), the
pre-merger notification requirements of the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended, and the rules and regulations promulgated
thereunder (the "HSR Act"), and filing and recordation of an appropriate
Certificate of Merger with the Secretary as required by Delaware Law or (ii) as
specified in Section 3.05(b) of the Target Disclosure Schedule.
 
     SECTION 3.06. Permits; Compliance. Each of the Target and the Target
Subsidiaries is in possession of all Governmental Authorizations necessary for
each of the Target and the Target Subsidiaries to own, lease and operate its
properties or to carry on its business as it is now being conducted (the "Target
Permits") and, as of the date hereof, no suspension or cancellation of any of
the Target Permits is pending or, to the
 
                                      A-12
<PAGE>   123
 
Knowledge of the Target, Threatened, except in each case for such Governmental
Authorizations, the absence of which would not have a Material Adverse Effect.
Neither the Target nor the Target Subsidiaries is in conflict with, or in
default or violation of, (i) any Law applicable to it or by which any property
or asset of it is bound or affected, or (ii) any Target Permit, other than a
conflict with, or default or violation of, such Laws or Target Permits that
would not have a Material Adverse Effect on Target.
 
     SECTION 3.07. Financial Statements; Books and Records.   (a) Target has
delivered to Parent: (i) (A) audited balance sheets of the Target and statements
of stockholders' (deficit) equity as at December 31, 1994, 1995 and 1996; (B)
audited statements of operations and statements of cash flows for the years
ended December 31, 1994, 1995, 1996; and (C) notes to such financial statements
(the "Notes") together with a report thereon of KPMG Peat Marwick LLP,
independent accountants; and (ii) (A) unaudited balance sheets of the Target and
statements of stockholders' (deficit) equity as at August 31, 1996 and 1997; and
(B) unaudited statements of operations and statements of cash flows for the
eight months ended August 31, 1996 and 1997 and (c) Notes (such financial
statements referred to in clauses (i) and (ii) together referred to as the
"Financial Statements"). Such Financial Statements and Notes fairly present the
financial condition and the results of operations, changes in stockholders'
equity, and cash flow of the Target as at the respective dates of and for the
periods referred to in such Financial Statements, all in accordance with GAAP,
except that the unaudited financial statements referred to in clause (ii) may be
subject to normal year-end adjustments. The Financial Statements reflect the
consistent application of such accounting principles throughout the periods
involved. No financial statements of any Person other than the Target are
required by GAAP to be included in the Financial Statements of the Target.
 
     (b) The books of account, minute books, stock record books, and other
records of the Target and each Target Subsidiary, all of which have been made
available to Parent, are complete and correct in all material respects and have
been maintained in accordance with sound business practices, including the
maintenance of an adequate system of internal controls. The minute books of the
Target and each Target Subsidiary contain accurate and complete records of all
meetings held of, and corporate action taken by, the stockholders, the Boards of
Directors, and committees of the Boards of Directors of the Target and each
Target Subsidiary, as appropriate, and no meeting of any such stockholders,
Board of Directors, or committee has been held for which minutes have not been
prepared and are not contained in such minute books. At the Closing, all of
those books and records will be in the possession of the Target.
 
     SECTION 3.08. Absence of Certain Changes or Events. Since August 31, 1997,
each of the Target and the Target Subsidiaries has conducted business only in
the Ordinary Course of Business and, since August 31,1997, there has not been
(a) any event or events (whether or not covered by insurance), individually or
in the aggregate, having a Material Adverse Effect, (b) any material change by
the Target in its accounting methods, principles or practices, (c) any entry by
the Target or the Target Subsidiaries into any Contract or transaction material
to the Target or the Target Subsidiaries, except in the Ordinary Course of
Business, (d) any declaration, setting aside or payment of any dividend or
distribution in respect of any capital stock of either the Target or the Target
Subsidiaries, (e) any redemption, purchase or other acquisition (including
issuance or granting of any rights to acquire) of any of their securities or (f)
other than pursuant to the Target Plans and the Target Other Benefit Obligations
(as defined in Section 3.10 hereof), any increase in or establishment of any
bonus, insurance, severance, deferred compensation, pension, retirement, profit
sharing, stock option, stock purchase or other employee benefit plan, except in
the Ordinary Course of Business.
 
     SECTION 3.09. Absence of Litigation.  Except as set forth in Section 3.09
of the Target Disclosure Schedule, there is no claim or Proceeding pending or,
to Target's Knowledge, Threatened against the Target or the Target Subsidiaries,
before any arbitrator or Governmental Authority, (a) to be asserted or
instituted against Target or the Target Subsidiaries, (b) which directly relates
to the Target, the Target Subsidiaries or any of their properties, assets or
business or to which the Target or Target Subsidiaries is a party, including
without limitation, the Intellectual Property Assets, (c) that affects any
Target Stockholders' Target Stock, (d) which seeks to and is reasonably likely
to significantly delay or prevent the consummation of the Merger, or (e) which
arises out of a warranty covering any of the Target Products or Target or the
Target Subsidiaries' other current or past goods or services other than warranty
claims in the Ordinary Course of Business. Neither the Target or the Target
Subsidiaries nor any property or asset of the Target or the Target Subsidiaries
is in
 
                                      A-13
<PAGE>   124
 
violation of any Order against Target or the Target Subsidiaries having,
individually or in the aggregate, a Material Adverse Effect.
 
     SECTION 3.10. Employee Benefits. (a) As used in this Section 3.10, the
following terms have the meanings set forth below.
 
          "ERISA" shall mean the Employee Retirement Income Security Act of
     1974, and regulations and rules issued pursuant to that Act, or any
     successor Law.
 
          "ERISA Affiliate" means any Person (including the Target Subsidiaries)
     that, together with the Target, would be treated as a single employer under
     Code Section 414.
 
          "Multiemployer Plan" has the meaning given in ERISA Section 3(37)(A).
 
          "Other Benefit Obligations" means all obligations, arrangements, or
     customary practices, whether or not legally enforceable, to provide
     benefits, other than salary, as compensation for services rendered, to
     present or former directors, employees, or agents, other than obligations,
     arrangements, and practices that are Plans. Other Benefit Obligations
     include consulting agreements under which the compensation paid does not
     depend upon the amount of service rendered, sabbatical policies, severance
     payment policies, dependent care assistance plans, cafeteria plans and
     fringe benefits within the meaning of Code Section 132.
 
          "PBGC" means the Pension Benefit Guaranty Corporation, or any
     successor thereto.
 
          "Pension Plan" has the meaning given in ERISA Section 3(2)(A).
 
          "Plan" has the meaning given in ERISA Section 3(3).
 
          "Plan Sponsor" has the meaning given in ERISA Section 3(16)(B).
 
          "Qualified Plan" means any Plan that meets or purports to meet the
     requirements of Code Section 401(a).
 
          "Target Other Benefit Obligation" means an Other Benefit Obligation
     owed, adopted, or followed by the Target or an ERISA Affiliate.
 
          "Target Plan" means all Plans of which the Target or an ERISA
     Affiliate is or was a Plan Sponsor, or to which the Target or an ERISA
     Affiliate otherwise contributes or has contributed, or in which the Target
     or an ERISA Affiliate otherwise participates or has participated. All
     references to Plans are to Target Plans unless the context requires
     otherwise.
 
          "Target VEBA" means a VEBA whose members include employees of the
     Target or any ERISA Affiliate.
 
          "Title IV Plans" means all Pension Plans that are subject to Title IV
     of ERISA, 29 U.S.C. Section 1301 et seq., other than Multiemployer Plans.
 
          "VEBA" means a voluntary employees' beneficiary association under Code
     Section 501(c)(9).
 
          "Welfare Plan" has the meaning given in ERISA Section 3(1).
 
     (b) (i) Section 3.10(b)(i) of the Target Disclosure Schedule contains a
complete and accurate list of all Target Plans and Target Other Benefit
Obligations, and identifies as such all Target Plans that are Qualified Plans.
 
          (ii) Section 3.10(b)(ii) of the Target Disclosure Schedule contains a
     complete and accurate list of (A) all ERISA Affiliates and (B) all Plans of
     which any such ERISA Affiliate is or was a Plan Sponsor, in which any such
     ERISA Affiliate participates or has participated, or to which any such
     ERISA Affiliate contributes or has contributed within the three years
     preceding the date of this Agreement.
 
                                      A-14
<PAGE>   125
 
     (c) Target has delivered to Parent:
 
          (i) all documents that set forth the terms of each Target Plan or
     Target Other Benefit Obligation and of any related trust, including (A) all
     plan descriptions and summary plan descriptions of Target Plans for which
     the Target is required to prepare and distribute plan descriptions and
     summary plan descriptions, and (B) all summaries and descriptions furnished
     to participants and beneficiaries regarding Target Plans and Target Other
     Benefit Obligations for which a plan description or summary plan
     description is not required;
 
          (ii) all personnel, payroll, and employment manuals and policies;
 
          (iii) a written description of any Target Plan or Target Other Benefit
     Obligation that is not otherwise in writing;
 
          (iv) all insurance policies purchased by or to provide benefits under
     any Target Plan;
 
          (v) all Contracts with third party administrators, actuaries,
     investment managers, consultants, and other independent contractors that
     relate to any Target Plan or Target Other Benefit Obligation;
 
          (vi) all reports submitted within the three years preceding the date
     of this Agreement by third party administrators, actuaries, investment
     managers, consultants, or other independent contractors with respect to any
     Target Plan or Target Other Benefit Obligation;
 
          (vii) the Form 5500 filed in each of the most recent three plan years
     with respect to each Target Plan, including all schedules thereto and the
     opinions of independent accountants;
 
          (viii) all notices that were given by the Internal Revenue Service or
     the Department of Labor to the Target, any ERISA Affiliate, or any Target
     Plan within the three years preceding the date of this Agreement; and
 
          (ix) with respect to Qualified Plans, the most recent determination
     letter for each such Target Plan and the most recent financial statement.
 
     (d) In addition:
 
          (i) The Target and each ERISA Affiliate has performed all of their
     material obligations to provide benefits under all Target Plans and Target
     Other Benefit Obligations. The Target and each ERISA Affiliate has made
     appropriate entries in its financial records and statements for all
     obligations and liabilities under such Plans and Obligations that have
     accrued but are not due.
 
          (ii) No statement, either written or oral, has been made by the Target
     or any ERISA Affiliate to any Person with regard to any Plan or Other
     Benefit Obligation that was not in accordance with the Plan or Other
     Benefit Obligation and that could have a Material Adverse Effect to the
     Target, any ERISA Affiliate or Parent.
 
          (iii) The Target and each ERISA Affiliate, with respect to all Target
     Plans and Target Other Benefit Obligations, is, and each Target Plan and
     Target Other Benefit Obligation is, in full compliance with ERISA, the
     Code, and other applicable Laws including the provisions of such Laws
     expressly mentioned in this Section 3.10, except where any failures to
     comply alone or in the aggregate would not have a Material Adverse Effect
     to the Target Plan or Target Other Benefit Obligation (or any participant
     or beneficiaries thereunder), the Target, any ERISA Affiliate or Parent.
     Any bonding required with respect to any Target Plan in accordance with
     applicable provisions of ERISA has been obtained and is in full force and
     effect.
 
             (A) No transaction prohibited by ERISA Section 406 and no
        "prohibited transaction" under Code Section 4975(c) has occurred with
        respect to any Target Plan.
 
             (B) Neither the Target nor any ERISA Affiliate has any known
        liability to the Internal Revenue Service with respect to any Plan,
        including any liability imposed by Chapter 43 of the Code.
 
                                      A-15
<PAGE>   126
 
             (C) Neither the Target nor any ERISA Affiliate has any known
        liability under ERISA Section 502.
 
             (D) All filings required by ERISA and the Code as to each Target
        Plan have been timely filed, and all material notices and disclosures to
        participants required by either ERISA or the Code have been timely
        provided.
 
             (E) All contributions and payments made or accrued with respect to
        all Target Plans and Target Other Benefit Obligations are deductible
        under Code Section 162 or Section 404.
 
          (iv) With respect to all Target Plans and Target Other Benefit
     Obligations, all applicable contributions and premium payments for all
     periods ending prior to the Closing Date shall be or have been made or
     accrued prior to the Closing Date in accordance with past practice. No
     Target Plan has any unfunded liability. The financial records of each
     funded Target Plan have been kept in accordance with GAAP.
 
          (v) Since December 31, 1996, there has been no establishment or
     amendment of any Target Plan or Target Other Benefit Obligation.
 
          (vi) To the Knowledge of the Target, no event has occurred or
     circumstance exists that could result in a material increase in premium
     costs of Target Plans and Target Other Benefit Obligations that are
     insured, or a material increase in benefit costs of such Plans and
     Obligations that are self-insured.
 
          (vii) Other than claims for benefits submitted by participants or
     beneficiaries, no claim against, or Proceeding involving, any Target Plan
     or Target Other Benefit Obligation is pending or, to Target's or any ERISA
     Affiliate's Knowledge, is Threatened.
 
          (viii) Each Qualified Plan of the Target or any ERISA Affiliate is
     qualified in form and operation under Code Section 401(a); each trust for
     each such Plan is exempt from federal income tax under Code Section 501(a).
     To Target's Knowledge, no event has occurred or circumstance exists that
     will or could give rise to disqualification or loss of tax-exempt status of
     any such Plan or trust. Each Qualified Plan of the Target or any ERISA
     Affiliate has received a favorable determination letter from the Internal
     Revenue Service evidencing compliance with the relevant provisions of the
     Tax Reform Act of 1986.
 
          (ix) No Target Plan is subject to Title IV of ERISA, and neither
     Target nor any ERISA Affiliate has any liability with respect to any Title
     IV Plan.
 
          (x) Neither the Target nor any ERISA Affiliate has ever established,
     maintained, or contributed to or otherwise participated in, or had an
     obligation to maintain, contribute to, or otherwise participate in, any
     Multiemployer Plan.
 
          (xi) Neither the Target nor any ERISA Affiliate has any liability
     (including current or potential withdrawal liability) with respect to any
     Multiemployer Plan.
 
          (xii) Neither the Target nor any ERISA Affiliate has ever established,
     maintained or contributed to any VEBA, and neither the Target nor any ERISA
     Affiliate has any liability with respect to any VEBA.
 
          (xiii) Except to the extent required under ERISA Section 601 et seq.
     and Code Section 4980B, neither the Target nor any ERISA Affiliate provides
     health or welfare benefits for any retired or former employee or is
     obligated to provide health or welfare benefits to any active employee
     following such employee's retirement or other termination of service.
 
          (xiv) The Target and each ERISA Affiliate has complied in all material
     respects with the provisions of ERISA Section 601 et seq. and Code Section
     4980B and has also complied in all material respects with the applicable
     provisions of ERISA Section 701 et seq. and Subtitle K of the Code.
 
          (xv) No payment that is owed or may become due to any Person will be
     non-deductible to the Target or subject to tax under Code Section 280G or
     Section 4999; nor will the Target be required to
 
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     "gross up" or otherwise compensate any such Person because of the
     imposition of any excise tax on a payment to such Person.
 
          (xvi) The consummation of the Transactions will not result in the
     payment, vesting, or acceleration of any benefit.
 
     SECTION 3.11. Labor Matters. (a) Section 3.11 of the Target Disclosure
Schedule contains a complete and accurate list of the following information for
each employee or director of the Target or the Target Subsidiaries, including
each employee on leave of absence or layoff status: name; job title; current
compensation paid or payable and any change in compensation since December 31,
1996; vacation accrued; and service credited for purposes of vesting and
eligibility to participate under the Target Plans and Target Other Benefit
Obligations (as defined in Section 3.10 hereof).
 
     (b) To Target's Knowledge, no officer or key employee of the Target or the
Target Subsidiaries is a party to, or is otherwise bound by, any agreement or
arrangement, including any confidentiality, noncompetition, or proprietary
rights agreement, between such officer or employee and any other Person
("Proprietary Rights Agreement") that would materially and adversely affect (i)
the performance of his duties as an officer or employee of the Target or the
Target Subsidiaries, or (ii) the ability of Target or the Target Subsidiaries to
conduct their business, including any Proprietary Rights Agreement with Target
or the Target Subsidiaries by any such employee or director. To the Target's
Knowledge, no officer or other key employee of the Target or the Target
Subsidiaries intends to terminate his employment with the Target or the Target
Subsidiaries.
 
     (c) Neither the Target nor the Target Subsidiaries has been or is a party
to any collective bargaining or other labor Contract. There has not been, there
is not presently pending or existing, and, to Target's Knowledge, there is not
Threatened, (a) any strike, slowdown, picketing, work stoppage, or employee
grievance process, (b) any Proceeding against either the Target or the Target
Subsidiaries relating to the alleged violation of any Law pertaining to labor
relations or employment matters, including any charge or complaint filed by an
employee or union with the National Labor Relations Board, the Equal Employment
Opportunity Commission, or any comparable Governmental Authority, organizational
activity, or other labor or employment dispute against or affecting any of the
Target or the Target Subsidiaries or (c) any application for certification of a
collective bargaining agent. There is no lockout of any employees by the Target
or the Target Subsidiaries, and no such action is contemplated by the Target or
the Target Subsidiaries. Each of the Target and the Target Subsidiaries has
complied in all respects with all Laws relating to employment, equal employment
opportunity, nondiscrimination, immigration, wages, hours, benefits, collective
bargaining, the payment of social security and similar taxes, occupational
safety and health, and plant closing, except for any noncompliance alone or in
the aggregate which would not have a Material Adverse Effect on Target, the
Target Subsidiaries or Parent.
 
     SECTION 3.12. Intellectual Property Assets. (a) The term "Intellectual
Property Assets" includes:
 
          (i) all business names, designs, trade names, trademarks or service
     marks, and any applications and registrations relating thereto, used or
     intended to be used by the Target or the Target Subsidiaries in relation to
     its goods or services, including, without limitation, all rights associated
     with those names recited in Schedule 3.12(a)(i) of the Target Disclosure
     Schedule (collectively, "Marks");
 
          (ii) all patents and patent applications on any subject matter, which
     have been developed, designed, made, conceived or reduced to practice
     jointly or individually by any employee of, or any Person retained by, the
     Target or the Target Subsidiaries, or which have been otherwise acquired by
     the Target or the Target Subsidiaries within the scope of such employment
     or retention, including, without limitation, those patents and patent
     applications recited in Schedule 3.12(a)(ii) of the Target Disclosure
     Schedule (collectively, "Patents");
 
          (iii) all copyrights in both published and unpublished works, which
     have been authored or placed in a tangible medium either jointly or
     individually by any employee of, or any Person retained by, the Target or
     the Target Subsidiaries within the scope of such employment or retention,
     or which have been otherwise acquired by the Target or the Target
     Subsidiaries (collectively, "Copyrights");
 
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<PAGE>   128
 
          (iv) all rights in mask works, which have been developed, designed,
     made, conceived or reduced to practice either jointly or individually by
     any employee of, or any Person retained by, the Target or the Target
     Subsidiaries within the scope of such employment or retention, or which
     have been otherwise acquired by the Target or the Target Subsidiaries
     (collectively, "Rights in Mask Works");
 
          (v) all trade secrets, not commonly known or available to the public
     which derive economic value, actual or potential, from not being generally
     known to, or ascertainable by proper means by, other Persons who can obtain
     economic value from its disclosure or use, including confidential or
     proprietary information, know-how, processes, methods, research, technical
     information, data, improvements, ideas, inventions, discoveries,
     techniques, developments, plans, schematics, drawings, flowcharts, prints,
     specifications, software programs, source and executable codes, development
     and marketing plans, strategies, forecasts, customer information, customer
     lists and the like, whether or not commercial, experimental or patentable,
     which have been developed, designed, made, conceived or reduced to practice
     jointly or individually by any employee of, or Person retained by, the
     Target or the Target Subsidiaries within the scope of such employment or
     retention, or which have been otherwise acquired by the Target or the
     Target Subsidiaries (collectively, "Trade Secrets");
 
          (vi) all goodwill associated with the Marks, Patents, Copyrights,
     Rights in Mask Works and Trade Secrets, all remedies and protections
     afforded under the laws of all applicable jurisdictions against violations
     or infringements thereof, as well as all rights of the Target or the Target
     Subsidiaries under any Contract relating to the Marks, Patents, Copyrights,
     Rights in Mask Works and Trade Secrets; and
 
          (vii) all attorney work files owned by the Target or the Target
     Subsidiaries relating to the foregoing.
 
     (b) Agreements. Section 3.12(b) of the Target Disclosure Schedule contains
a complete and accurate list and summary description, including any royalties
paid or received by the Target or the Target Subsidiaries, of all Contracts
relating to the Intellectual Property Assets to which the Target or the Target
Subsidiaries is a party or by which the Target or the Target Subsidiaries is
bound, except for any license implied by the sale of a product and perpetual,
paid-up licenses for commonly available software programs with a value of less
than $5,000.00 under which the Target or the Target Subsidiaries is the
licensee. There are no outstanding or Threatened disputes or disagreements with
respect to any such Contract.
 
     (c) Intellectual Property Assets Necessary for the Target's Business
 
          (i) The Intellectual Property Assets are all those necessary for the
     operation of the Target's businesses as they are currently conducted. The
     Target or one of the Target's Subsidiaries is the owner of all right,
     title, and interest in and to each of the Intellectual Property Assets,
     free and clear of all liens, security interests, charges, encumbrances,
     equities, and other than those Liens referred to in Section 3.19 of the
     Target Disclosure Schedule hereof and has the right to make, have made,
     develop, use, sell or otherwise employ any technology or product of the
     Target without payment to a third party and without a claim of infringement
     or other challenge except as otherwise set forth in Section 3.19 of the
     Target Disclosure Schedule.
 
          (ii) All former and current employees of the Target or the Target
     Subsidiaries, and any Person otherwise retained by the Target or the Target
     Subsidiaries, on a consulting or other non- employee basis, have executed
     written Contracts with the Target or the Target Subsidiaries that assign
     all rights to any inventions, improvements, discoveries, or information
     relating to the Intellectual Property Assets to the Target or one of the
     Target's Subsidiaries. To Target's Knowledge, no employee of the Target or
     the Target Subsidiaries has entered into any Contract that restricts or
     limits in any way the scope or type of work in which the employee may be
     engaged or that requires the employee to transfer, assign or disclose
     information concerning his work to anyone other than the Target or one of
     the Target Subsidiaries.
 
     (d) Marks
 
          (i) Section 3.12(a)(i) of the Target Disclosure Schedule contains a
     complete and accurate list and summary description of all Marks. The Target
     is the owner of all right, title, and interest in and to each of
 
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<PAGE>   129
 
     the Marks, free and clear of all liens, security interests, charges,
     encumbrances, equities and other adverse claims.
 
          (ii) All Marks that have been registered with the United States Patent
     and Trademark Office are currently in compliance with all Laws (including
     the timely post-registration filing of affidavits of use and
     incontestability and renewal applications), are valid and enforceable, and
     are not subject to any maintenance fees or actions falling due within
     ninety days after the Effective Time.
 
          (iii) No Mark has been or is now involved in any opposition,
     invalidation, or cancellation, and no such action is Threatened with the
     respect to any of the Marks.
 
          (iv) There is no trademark or trademark application of any third party
     that may or does interfere with any of the Marks.
 
          (v) No Mark is infringed or has been challenged or Threatened in any
     way. None of the Marks used by the Target or Target's Subsidiaries
     infringes or is alleged to infringe any trade name, trademark or service
     mark of any third party.
 
          (vi) All products and materials containing a Mark bear the proper
     federal registration notice where required by Law.
 
     (e) Patents
 
          (i) Section 3.12(a)(ii) of the Target Disclosure Schedule contains a
     complete and accurate list and summary description of all Patents. The
     Target is the owner of all right, title and interest in and to each of the
     Patents, free and clear of all liens, security interests, charges,
     encumbrances, entities, and other adverse claims.
 
          (ii) All of the issued Patents are currently in compliance with all
     Laws (including payment of filing, examination and maintenance fees), are
     valid and enforceable, and are not subject to any maintenance fees or
     actions falling due within ninety days after the Effective Time.
 
          (iii) No Patent has been or is now involved in any interference,
     reissue, reexamination or opposition proceeding. There is no patent or
     patent application of any third party that may or does interfere with any
     of the Patents.
 
          (iv) No Patent is infringed, or has been challenged or Threatened in
     any way. None of the products manufactured or sold, nor any method or
     process used, by the Target or Target's Subsidiaries infringes or is
     alleged to infringe any patent or other proprietary right of any third
     party.
 
          (v) All products made, used, or sold under the Patents have been
     marked with the proper patent notice.
 
     (f) Copyrights
 
          (i) Section 3.12(a)(iii) of the Target Disclosure Schedule contains a
     complete and accurate list and summary description of all Copyrights that
     have been registered. The Target is the owner of all right, title, and
     interest in and to each of the Copyrights, free and clear of all liens,
     security interests, charges, encumbrances, equities, and other adverse
     claims.
 
          (ii) All the Copyrights that have been registered are currently in
     compliance with all Laws, are valid and enforceable, and are not subject to
     any maintenance fees or taxes or actions falling due within ninety days
     after the Effective Time.
 
          (iii) No Copyright is infringed or has been challenged or Threatened
     in any way. None of the subject matter of any of the Copyrights infringes
     or is alleged to infringe any copyright of any third party, or is a
     derivative work based on the work of a third party.
 
          (iv) All works encompassed by the Copyrights have been marked with the
     proper copyright notice, if any, required by Law.
 
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<PAGE>   130
 
     (g) Trade Secrets
 
          (i) With respect to each Trade Secret, the written documentation
     relating to such Trade Secret is accurate in all material respects.
 
          (ii) The Target has taken all reasonable precautions to protect the
     secrecy, confidentiality and value of its Trade Secrets.
 
          (iii) The Target has good title and an absolute (but not necessarily
     exclusive) right to use the Trade Secrets. The Trade Secrets have not been
     made public, and have not been used, divulged or appropriated either for
     the benefit of any Person (other than the Target) or to the detriment of
     the Target. No Trade Secret is subject to any adverse claim or has been
     challenged or Threatened in any way, or has been improperly obtained from a
     third party.
 
     SECTION 3.13. Taxes. (a) The Target (including the Target Subsidiaries) has
(i) filed all federal, state, local and foreign tax returns required to be filed
by it prior to the date of this Agreement (taking into account extensions), (ii)
paid or accrued all taxes shown to be due on such returns and paid all
applicable ad valorem and value added taxes as are due and (iii) paid or accrued
all taxes for which a notice of assessment or collection has been received
(other than amounts being contested in good faith by appropriate Proceedings),
except in the case of clause (i), (ii) or (iii) for any such filings, payments
or accruals which would not, individually or in the aggregate, have a Material
Adverse Effect. Neither the Internal Revenue Service nor any other taxing
authority has asserted any claim for taxes, or to the best Knowledge of the
Target, is Threatening to assert any claims for taxes; which claims,
individually or in the aggregate, could have a Material Adverse Effect. The
Target has open years for federal tax returns only as set forth in the Section
3.13(a) of the Target Disclosure Schedule. The Target has withheld or collected
and paid over to the appropriate Governmental Authorities (or is properly
holding for such payment) all taxes required by Law to be withheld or collected,
except for amounts which would not, individually or in the aggregate, have a
Material Adverse Effect. The Target has not made an election under Section
341(f) of the Code. There are no liens for taxes upon the assets of the Target.
 
     (b) The Target has not taken or agreed to take any action that would
prevent the Merger from constituting a reorganization qualifying under the
provisions of Section 368(a) of the Code.
 
     SECTION 3.14. Environmental Matters. (a) For purposes of this Agreement,
the following terms shall have the following meanings: (i) "Hazardous
Substances" means (A) those substances defined in or regulated under the
following federal statutes and their state counterparts, as each may be amended
from time to time, and all regulations thereunder: the Hazardous Materials
Transportation Act, the Resource Conservation and Recovery Act, the
Comprehensive Environmental Response, Compensation and Liability Act, the Clean
Water Act, the Safe Drinking Water Act, the Atomic Energy Act, the Federal
Insecticide, Fungicide, and Rodenticide Act, the Toxic Substances Control Act
and the Clean Air Act; (B) petroleum and petroleum products, byproducts and
breakdown products including crude oil and any fractions thereof; (C) natural
gas, synthetic gas, and any mixtures thereof; (D) polychlorinated biphenyls; and
(E) any other chemicals, materials or substances defined or regulated as toxic
or hazardous or as a pollutant or contaminant or as a waste under any applicable
Environmental Law; and (ii) "Environmental Laws" means any Law, now or hereafter
in effect and as amended, and any judicial or administrative interpretation
thereof, including any judicial or administrative Order or Consent, relating to
pollution or protection of the environment, health, safety or natural resources,
including without limitation, those relating to (A) releases or threatened
releases of Hazardous Substances or materials containing Hazardous Substances or
(B) the manufacture, handling, transport, use, treatment, storage or disposal of
Hazardous Substances or materials containing Hazardous Substances.
 
     (b) Except as would not individually or in the aggregate result in or be
likely to result in any damages in excess of $500,000: (i) to Target's
Knowledge, the Target is and has been in material compliance with all applicable
Environmental Laws; (ii) the Target has obtained all material permits,
approvals, identification numbers, licenses or other authorizations required
under any applicable Environmental Laws ("Environmental Permits") and is and has
been in material compliance with their requirements; (iii) there are no
 
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<PAGE>   131
 
underground or aboveground storage tanks or any surface impoundments, septic
tanks, pits, sumps or lagoons in which Hazardous Substances are being or have
been treated, stored or disposed of on any owned or leased real property or on
any real property formerly owned, leased or occupied by the Target; (iv) there
is, to Target's Knowledge, no asbestos or asbestos-containing material on any
owned or leased real property in violation of applicable Environmental Laws; (v)
to Target's Knowledge, the Target has not released, discharged or disposed of
Hazardous Substances on any owned or leased real property or on any real
property formerly owned, leased or occupied by the Target and none of such
property is contaminated with any Hazardous Substances; (vi) the Target is not
undertaking, and has not completed, any investigation or assessment or remedial
or response action relating to any such release, discharge or disposal of or
contamination with Hazardous Substances at any site, location or operation,
either voluntarily or pursuant to the Order of any Governmental Authority or the
requirements of any Environmental Law; and (vii) there are no past, pending or,
to Target's Knowledge, Threatened actions, suits, demands, demand letters,
claims, liens, notices of non-compliance or violation, notices of liability or
potential liability, investigations, Proceedings, consent orders or consent
agreements relating in any way to Environmental Laws, any Environmental Permits
or any Hazardous Substances ("Environmental Claims") against the Target or any
of its property, and to Target's Knowledge, there are no circumstances that can
reasonably be expected to form the basis of any such Environmental Claim,
including without limitation with respect to any off-site disposal location
presently or formerly used by the Target or any of its predecessors.
 
     (c) The Target has provided Parent or Parent Sub with copies of any
environmental reports, studies or analyses in its possession or under its
control relating to owned or leased real property or the operations of the
Target.
 
     SECTION 3.15. Target Products; Regulation. There have been no written
notices, citations or decisions by any Governmental Authority received by Target
or the Target Subsidiaries that any product produced, manufactured, marketed or
distributed at any time by the Target or the Target Subsidiaries (the "Target
Products") is defective or fails to meet any applicable standards promulgated by
any such Governmental Authority.
 
     SECTION 3.16. Opinion of Financial Advisor. The Target has received the
written opinion of Donaldson, Lufkin & Jenrette Securities Corporation ("Target
Banker") on the date of this Agreement to the effect that the consideration to
be paid by Parent in the Merger is fair from a financial point of view to the
Target Stockholders as of the date thereof, and the Target will promptly, after
the date of this Agreement, deliver a copy of such opinion to Parent. A copy of
the Target Banker engagement letter, dated June 16, 1997, has previously been
delivered to Parent.
 
     SECTION 3.17. Vote Required. The affirmative vote of a majority of the then
outstanding shares of Target Common Stock and the Series A Preferred Stock
voting together as a single class along with (i) an affirmative vote of the
holders of 60% of the shares of Series B Preferred Stock, (ii) an affirmative
vote of the holders of 60% of the shares of Series C Preferred Stock, and (iii)
an affirmative vote of the holders of 60% of the shares of Series D Preferred
Stock are the only votes of the holders of any class or series of capital stock
of the Target necessary to approve the Merger.
 
     SECTION 3.18. Brokers. No broker, finder or investment banker (other than
Target Banker) is entitled to any brokerage, finder's or other fee or commission
in connection with the Transactions based upon arrangements made by or on behalf
of the Target. The Target has heretofore furnished to Parent a correct copy of
all agreements between the Target and Target Banker pursuant to which such firm
would be entitled to any payment relating to the Transactions.
 
     SECTION 3.19. Tangible Property. The Target and the Target Subsidiaries
have good title to, or a valid leasehold interest in, the properties and assets
used by them or shown on the unaudited balance sheet dated August 31, 1997 or
acquired after the date thereof, with the exception of such property and assets
sold in the Ordinary Course of Business, and such properties and assets are free
and clear of any mortgage, pledge, lien, encumbrance, charge, or other security
interest ("Liens"), except Liens in favor of lenders as reflected in the
Financial Statements and statutory, purchase money, workers compensation,
landlord and similar Liens incurred in the Ordinary Course of Business.
 
                                      A-21
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     SECTION 3.20. Material Contracts. (a) Section 3.20(a) of the Target
Disclosure Schedule contains a complete and accurate list as of October 2, 1997,
and the Target has delivered to the Parent true and complete copies of the
following outstanding Contracts, except where noted, to which Target or either
Target Subsidiary are currently a party or for which Target or either Target
Subsidiary are currently liable:
 
          (i) each Contract that involves performance of services or delivery of
     goods or materials by the Target or either Target Subsidiary of an amount
     or value in excess of $100,000;
 
          (ii) each Contract that involves performance of services or delivery
     of goods or materials to the Target or either Target Subsidiary of an
     amount or value in excess of $100,000;
 
          (iii) each Contract that was not entered into in the Ordinary Course
     of Business and that involves expenditures or receipts of the Target or
     either Target Subsidiary in excess of $100,000;
 
          (iv) each lease, rental or occupancy agreement, license, installment
     and conditional sale agreement, and other Contract affecting the ownership
     of, leasing of, title to, use of, or any leasehold or other interest in,
     any real or personal property (except personal property leases and
     installment and conditional sales agreements having a value per item or
     aggregate payments of less than $100,000 and with terms of less than one
     year);
 
          (v) each licensing agreement other than "shrink wrap" or similar
     licenses of commercially available software or other material Contract with
     respect to the Intellectual Property Assets or any other Patents, Marks,
     Copyrights, or other intellectual property, including agreements with
     current or former employees, consultants, or contractors regarding the
     appropriation or the non-disclosure of any of the Intellectual Property
     Assets;
 
          (vi) each collective bargaining agreement and other Contract to or
     with any labor union or other employee representative of a group of
     employees;
 
          (vii) each joint venture, partnership, and other Contract (however
     named) not otherwise described in this Section involving a sharing of
     profits, losses, costs, or liabilities by the Target or either Target
     Subsidiary with any other Person;
 
          (viii) each Contract containing covenants that in any way purport to
     restrict the on-going business activity of the Target or either Target
     Subsidiary or limit the freedom of the Target or either Target Subsidiary
     to engage in any line of business or to compete with any Person;
 
          (ix) each Contract providing for payments to or by any Person not
     affiliated with Target or either Target Subsidiary based on sales,
     purchases, or profits, other than direct payments for goods or services;
 
          (x) each power of attorney given by Target or either Target Subsidiary
     that is currently effective and outstanding;
 
          (xi) each Contract entered into other than in the Ordinary Course of
     Business that contains or provides for an express undertaking by the Target
     or either Target Subsidiary to be responsible for consequential Damages;
 
          (xii) each Contract for capital expenditures in excess of $100,000;
 
          (xiii) each written warranty, guaranty, and or other similar
     undertaking with respect to contractual performance extended by the Target
     or either Target Subsidiary other than in the Ordinary Course of Business;
 
          (xiv) each Contract for sales, marketing and support services provided
     by independent agents or other Persons for the Target Products or other
     goods and services of the Target or either Target Subsidiary of an amount
     or value in excess or expected to be in excess of $100,000;
 
          (xv) each Contract under which another Person is appointed a
     distributor of the Target Products or other goods and services of the
     Target or either Target Subsidiary or under which the Target or either
 
                                      A-22
<PAGE>   133
 
     Target Subsidiary is appointed a distributor of another Person's goods or
     services, of an amount or value in excess of $100,000;
 
          (xvi) each Contract relating to manufacturing of proprietary
     components of the Target Products or other goods of the Target or either
     Target Subsidiary of an amount or value in excess of $100,000; and
 
          (xvii) each amendment, supplement, and modification (whether oral or
     written) in respect of any of the foregoing.
 
     Section 3.20(a) of the Target Disclosure Schedule identifies any such
     written Contracts and, in respect of oral Contracts, sets forth reasonably
     complete details concerning any such oral Contracts.
 
     (b) Each Contract identified or required to be identified in Section
3.20(a) of the Target Disclosure Schedule is, in all material respects, in full
force and effect and is valid and enforceable in accordance with its terms, and
to Target's Knowledge, no party is in default thereunder and no event has
occurred which, but for the passage of time or the giving of notice or both,
would constitute a default thereunder, except, in each case, where the
invalidity, default or breach would not, individually or in the aggregate, have
a Material Adverse Effect, and the Target has given to or received from any
other Person any notice or other communication (whether oral or written)
regarding any actual, alleged, possible, or potential violation or breach of, or
default under, any Contract, except in each case, where any breach would not
individually or in the aggregate have a Material Adverse Effect.
 
     (c) There are no renegotiations of, attempts to renegotiate, or outstanding
rights to renegotiate any material amounts paid or payable to the Target under
current or completed Contracts with any Person and no such Person has made
written demand for such renegotiation.
 
     (d) The Contracts relating to the sale, design, manufacture, or provision
of products or services by the Target or either Target Subsidiary have been
entered into in the Ordinary Course of Business and, to Target's Knowledge, have
been entered into without the commission of any act alone or in concert with any
other Person, or any consideration having been paid or promised, that is or
would be in violation of any Law.
 
     SECTION 3.21. Accounting and Tax Matters. (a) At least ninety percent (90%)
of the fair market value of the net assets and at least seventy percent (70%) of
the fair market value of the gross assets held by the Target immediately prior
to the Merger will be held by the Target at the Effective Time. For the purpose
of determining the percentage of the Target's net and gross assets held by the
Target at the Effective Time, the following assets will be treated as property
held by the Target immediately prior to but not at the Effective Time: (i)
assets disposed of by the Target prior to the Merger and in contemplation
thereof (including without limitation any asset disposed of by the Target, other
than in the Ordinary Course of Business, pursuant to a plan or intent existing
during the period ending at the Effective Time and beginning with the
commencement of negotiations (whether formal or informal) with Parent regarding
the Merger (the "Pre-Merger Period")), (ii) assets used by the Target to pay
expenses or liabilities incurred in connection with the Merger and (iii) assets
used to make distributions, redemptions or other payments in respect of the
Target Stock or rights to acquire such stock (including payments treated as such
for tax purposes but excluding regular, normal dividends) that are made in
contemplation of the Merger or related thereto.
 
     (b) The Target has no Knowledge of, and believes that there does not exist,
any plan or intention on the part of the Target Stockholders (a "Target
Stockholder Plan") to engage in a sale, exchange, transfer, distribution
(including, without limitation, a distribution by a partnership to its partners
or by a corporation to its stockholders), pledge, disposition or any other
transaction which results in a reduction in the risk of ownership or a direct or
indirect disposition (a "Sale") of a number of shares of Parent Common Stock to
be issued to such stockholders in the Merger, sufficient to reduce the Target
Stockholders' ownership of Parent Common Stock to a number of shares having an
aggregate fair market value, as of the Effective Time of the Merger, of less
than fifty percent (50%) of the aggregate fair market value, immediately prior
to the Merger, of all outstanding shares of Target Stock. For purposes of this
paragraph, shares of Target Stock (i) with respect to which a Target Stockholder
receives consideration in the Merger other than Parent Common Stock (including,
without limitation, cash received in lieu of fractional shares of Parent Common
Stock) and/or
 
                                      A-23
<PAGE>   134
 
(ii) shares of Target Stock with respect to which a Sale occurs prior to and in
contemplation of the Merger, shall be considered shares of outstanding Target
Stock exchanged for Parent Common Stock in the Merger and then disposed of
pursuant to a Target Stockholder Plan.
 
     (c) The Target is not an investment company as defined in Section
368(a)(2)(F)(iii) and (iv) of the Code.
 
     (d) As of the Effective Time, the fair market value of the assets of the
Target will exceed the sum of its liabilities, plus the amount of other
liabilities, if any, to which its assets are subject.
 
     (e) The Target is not under the jurisdiction of a court in a Title 11 or
similar case within the meaning of Section 368(a)(3)(A) of the Code.
 
     SECTION 3.22. Certain Business Practices. As of the date of this Agreement,
to the Knowledge of Target or any Target Subsidiary neither the Target nor
either Target Subsidiary nor any director, officer, agent or employee of the
Target or either Target Subsidiary and no party to any Contract with Target or
the Target Subsidiaries, has (i) used any funds for contributions, gifts,
entertainment or other expenses relating to political activities that violate
any Law, (ii) made any payment to foreign or domestic government officials or
employees or to foreign or domestic political parties or campaigns that violate
any Law or violated any provision of the Foreign Corrupt Practices Act of 1977,
as amended, or (iii) made any other payment that violates any Law.
 
     SECTION 3.23. Real Property and Leases. (a) Neither the Target nor the
Target Subsidiaries owns or has owned any real property.
 
     (b) Section 3.23(b) of the Target Disclosure Schedule lists and describes
all real property leased or subleased to either the Target or the Target
Subsidiaries. With respect to each lease and sublease: (i) the lease or sublease
is legal, valid, binding, enforceable, and in full force and effect in all
material respects; (ii) to the Knowledge of Target, no party to the lease or
sublease is in material breach or default, and no event has occurred which, with
notice or lapse of time, would constitute a material breach or default or permit
termination, modification, or acceleration thereunder; (iii) to the Knowledge of
Target, no party to the lease or sublease has repudiated any material provision
thereof; (iv) there are no material disputes, oral agreements, or forbearance
programs in effect as to the lease or sublease; (v) neither of the Target or the
Target Subsidiaries has assigned, transferred, conveyed, mortgaged, deeded in
trust, or encumbered any interest in the leasehold or subleasehold; and (vi) to
Target's Knowledge, all facilities leased or subleased thereunder have received
all Governmental Authorizations (including material licenses and permits)
required in connection with the operation thereof, and have been operated and
maintained in all material respects in accordance with all applicable Laws.
 
     SECTION 3.24. Insurance. All material assets and risks of the Target are
covered by valid and currently effective insurance policies in such types and
amounts as are consistent, to Target's Knowledge, with customary practices and
standards of companies engaged in businesses and operations similar to those of
the Target.
 
     SECTION 3.25. Indemnification Claims. Section 3.25 of the Target Disclosure
Schedule sets forth a list of all Persons who are parties to director, officer
and/or employee indemnification agreements with Target or the Target
Subsidiaries (the "Indemnification Agreements"). Except as set forth in Section
3.25 of the Target Disclosure Schedule, there are no outstanding claims under
any of the Indemnification Agreements or under any indemnification rights
granted pursuant to the certificate of incorporation or bylaws of Target or the
Target Subsidiaries (as currently in effect); and to Target's Knowledge, there
are no facts or circumstances that either now, or with the passage of time,
could reasonably be expected to provide a basis for a claim under any such
Indemnification Agreement or under any indemnification rights granted pursuant
to the certificate of incorporation or bylaws of Target or the Target
Subsidiaries.
 
     SECTION 3.26. Board Recommendation. At a meeting duly called and held in
compliance with Delaware Law, the Board of Directors of the Target has
unanimously adopted a resolution (i) approving the Merger, based on a
determination that the Merger is fair to the holders of Target Stock and is in
the best interests of
 
                                      A-24
<PAGE>   135
 
the Target Stockholders and (ii) approving and adopting this Agreement and the
Transactions contemplated hereby and thereby and unanimously recommending
approval and adoption of this Agreement and the Transactions contemplated hereby
and thereby by the stockholders of the Target.
 
     SECTION 3.27. Change in Control. Except as set forth in Section 3.27 of the
Target Disclosure Schedule, copies of which have been delivered to Parent,
neither the Target nor the Target Subsidiaries is a party to any Contract which
contains a "change in control," "potential change in control" or similar
provision and the consummation of the Transactions will not (either alone or
upon the occurrence of any additional acts or events) result in any payment
(whether of severance pay or otherwise) becoming due from the Target or the
Target Subsidiaries to any Person.
 
     SECTION 3.28. Payments Resulting from Mergers. Except as set forth in
Section 3.28 of the Target Disclosure Schedule, copies of which have been
delivered to Parent, neither the consummation nor announcement of any of the
Transactions will result in any (i) material payment (whether of severance pay
or otherwise) becoming due from Target or the Target Subsidiaries to any
director, officer, employee or former employee thereof under (i) any management,
employment, deferred compensation, severance (including any payment, right or
benefit resulting from a change in control), bonus or other contract for
personal services with any officer, director or employee or any plan, agreement
or understanding similar to any of the foregoing, or any "rabbi trust" or
similar arrangement, or (ii) material benefit under any Plan being established
or becoming accelerated, vested or payable.
 
     SECTION 3.29. State Takeover Statutes. The Board of Directors of Target has
approved the terms of this Agreement and the Merger and the other Transactions,
and such approval is sufficient to render inapplicable to the Merger and the
other Transactions the provisions of Section 203 of the Delaware Law. To
Target's Knowledge, no other state takeover statute or similar statute or
regulation applies or purports to apply to the Merger or the other Transactions
and no provision of the certificate of incorporation, bylaws or other governing
instruments of Target (including the Certificates of Designations) or either of
the Target Subsidiaries would, directly or indirectly, restrict or impair the
ability of Parent to vote, or otherwise to exercise the rights of a stockholder
with respect to, shares of Target and the Target Subsidiaries that may be
acquired or controlled by Parent.
 
                                   ARTICLE IV
 
                    REPRESENTATIONS AND WARRANTIES OF PARENT
                                 AND PARENT SUB
 
     Except as set forth in the disclosure schedule delivered by Parent and
Parent Sub to the Target and signed by the Target, Parent and Parent Sub for
identification prior to the execution and delivery of this Agreement (the
"Parent Disclosure Schedule"), which shall identify exceptions by specific
section references, Parent and Parent Sub hereby, jointly and severally,
represent and warrant to the Target that:
 
     SECTION 4.01. Corporate Organization and Qualification. Each of Parent and
Parent Sub is a corporation duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation and has the
requisite corporate power and authority to own, lease and operate its properties
and to carry on its business as it is now being conducted. Each of Parent and
Parent Sub is duly qualified or licensed as a foreign corporation to do
business, and is in good standing in each jurisdiction where the character of
the properties owned, leased or operated by it or the nature of its business
makes such qualification or licensing necessary, except for such failures to be
so qualified or licensed and in good standing as would not, individually or in
the aggregate, have a Material Adverse Effect. Parent is not, and has not been
within the two years immediately preceding the date of this Agreement, a
subsidiary or division of another corporation, nor has Parent within such time
owned, directly or indirectly, any shares of Target Common Stock.
 
     SECTION 4.02. Certificate of Incorporation and Bylaws. Parent has
heretofore furnished or made available to the Target a complete and correct copy
of the certificates of incorporation and bylaws of each of Parent and Parent
Sub, each as amended to date. Neither Parent nor Parent Sub is in violation of
any provision of its certificate of incorporation or bylaws.
 
                                      A-25
<PAGE>   136
 
     SECTION 4.03. Capitalization. As of the date of this Agreement, the
authorized capital stock of Parent consists of 500,000,000 shares of Parent
Common Stock, $0.01 par value, and 5,000,000 shares of preferred stock, $1.00
par value ("Parent Preferred Stock"). As of June 30, 1997, (a) 117,388,254
shares of Parent Common Stock were issued and outstanding, all of which were
validly issued, fully paid and nonassessable, (b) 4,988,958 shares of Parent
Common Stock were held in the treasury of Parent, (c) 9,414,142 shares of Parent
Common Stock were reserved for future issuance pursuant to outstanding stock
options or stock incentive rights granted pursuant to Parent's stock option and
restricted stock plans, and (d) no shares of Parent Preferred Stock were
outstanding. The authorized capital stock of Parent Sub consists of 1,000 shares
of Parent Sub Common Stock, of which, as of the date of this Agreement, one (1)
share is issued and outstanding and held by Parent. The shares of Parent Common
Stock to be issued pursuant to the Merger will be duly authorized, validly
issued, fully paid and nonassessable and not subject to preemptive rights
created by statute, Parent's certificate of incorporation or bylaws or any
agreement to which Parent is a party or by which Parent is bound and will, when
issued, be registered under the Securities Act and the Exchange Act and
registered or exempt from registration under applicable Blue Sky Laws and
authorized for listing on Nasdaq.
 
     SECTION 4.04. Authority Relative to This Agreement. Each of Parent and
Parent Sub has all necessary corporate power and authority to execute and
deliver this Agreement and, with respect to the Merger, to perform its
obligations hereunder and to consummate the Transactions. The execution and
delivery of this Agreement by Parent and Parent Sub and the consummation by
Parent and Parent Sub of the Transactions have been duly and validly authorized
by all necessary corporate action and no other corporate proceedings on the part
of Parent or Parent Sub are necessary to authorize this Agreement or to
consummate the Transactions (other than, with respect to the issuance of Parent
Common Stock pursuant to the Merger, approval of the application for listing of
such shares of Parent Common stock on Nasdaq, and with respect to the Merger,
the filing and recordation of the appropriate Certificate of Merger with the
Secretary as required by Delaware Law). This Agreement has been duly and validly
executed and delivered by Parent and Parent Sub and, assuming the due
authorization, execution and delivery of this Agreement by the Target,
constitutes a legal, valid and binding obligation of each of Parent and Parent
Sub enforceable against each of Parent and Parent Sub in accordance with its
terms.
 
     SECTION 4.05. No Conflict; Required Filings and Consents. (a) The execution
and delivery of this Agreement by Parent and Parent Sub do not, and the
performance of this Agreement by Parent and Parent Sub will not, subject to,
obtaining the Consents and permits and making the filings described in Section
4.05(b) and Section 4.05(b) of the Parent Disclosure Schedule, (i) conflict with
or violate the certificate of incorporation of either Parent or Parent Sub, (ii)
conflict with or violate any Law applicable to Parent or Parent Sub or by which
any property or asset of any of them is bound or affected, or (iii) result in
any Breach of or constitute a default (or an event which with notice or lapse of
time or both would become a default) under, or give to others any rights of
termination, amendment, acceleration or cancellation of, or result in the
creation of a lien or other encumbrance on any property or asset of Parent or
Parent Sub or require the Consent of any third party pursuant to, any note,
bond, mortgage, indenture, Contract, license, permit, franchise or other
instrument to which Parent or Parent Sub is a party or by which Parent or Parent
Sub or any property or asset of any of them is bound or affected, except for any
such conflicts, violations, breaches, defaults or other occurrences which would
not, individually or in the aggregate, have a Material Adverse Effect on Parent
or prevent Parent or Parent Sub from performing their respective obligations
under this Agreement and consummating the Transactions.
 
     (b) The execution and delivery of this Agreement by Parent and Parent Sub
do not, and the performance of this Agreement by Parent and Parent Sub will not,
require any Consent or filing with or notification to, any Governmental
Authority, except (i) for applicable requirements, if any, of the Exchange Act,
the Securities Act, Blue Sky Laws, the HSR Act and filing and recordation of an
appropriate Certificate of Merger with the Secretary as required by Delaware
Law, (ii) as specified in Section 4.05(b) of the Parent Disclosure Schedule, and
(iii) where failure to obtain such consents, approvals, authorizations or
permits, or to make such filings or notifications, would not have a Material
Adverse Effect on Parent and would not prevent or delay consummation of the
Transactions, or otherwise prevent Parent or Parent Sub from performing their
respective obligations under this Agreement.
 
                                      A-26
<PAGE>   137
 
     SECTION 4.06. Ownership of Parent Sub; No Prior Activities. (a) Parent Sub
was formed solely for the purpose of engaging in the Transactions contemplated
by this Agreement.
 
     (b) As of the date hereof and the Effective Time, except for obligations or
liabilities incurred in connection with its incorporation or organization and
the Transactions and except for this Agreement and any other agreements or
arrangements contemplated by this Agreement, Parent Sub has not and will not
have incurred, directly or indirectly, through any subsidiary or affiliate, any
obligations or liabilities or engaged in any business activities of any type or
kind whatsoever or entered into any agreements or arrangements with any Person.
 
     SECTION 4.07. Parent Stock. Parent has not made any distributions to any
holder of Parent Stock or participated in or effected any issuance, exchange or
retirement of Parent Common Stock, or otherwise changed the equity interest of
holders of Parent Common Stock, in contemplation of effecting the Merger within
the two years immediately preceding the date hereof. Any shares of Parent Common
Stock that Parent has reacquired during the two years immediately preceding the
date hereof have been so reacquired only for purposes other than "business
combinations," as such term is defined in Accounting Principals Board Opinion
No. 16, as amended.
 
     SECTION 4.08. Parent Documents. Parent has heretofore furnished Target with
a true and complete copy of each report, schedule, registration statement and
definitive proxy statement filed by it with the SEC since January 1, 1997 (as
any such documents have since the time of their original filing been amended,
the "Parent Documents"), which are all the documents (other than preliminary
materials) that it was required to file with the SEC since that date. As of
their respective dates, the Parent Documents did not contain any untrue
statements of a material fact or omit to state material facts required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading. As of their respective
dates, the Parent Documents complied in all material respects with applicable
requirements of the Securities Act and the Exchange Act and the rules and
regulations promulgated under such statutes. The financial statements contained
in the Parent Documents, together within the notes thereto, have been prepared
in accordance with GAAP (except as may be indicated in the notes thereto, or in
the case of unaudited financial statements, as permitted by Form 10-Q), and
present fairly the financial condition of Parent at said dates and the
consolidated results of operations and cash flows of Parent of the periods then
ended.
 
     SECTION 4.09. Legal Proceedings. Except as disclosed in the Parent
Documents, there is no material litigation, governmental investigation or other
Proceeding pending or, to Parent's Knowledge, Threatened against or relating to
Parent, its properties or business, or the Transactions contemplated by this
Agreement, that if adversely decided would have a Material Adverse Effect on
Parent.
 
     SECTION 4.10. Subsequent Events. Except as disclosed in the last-filed
Parent Document, there have been no event or events which individually or in the
aggregate would have a Material Adverse Effect on Parent.
 
     SECTION 4.11. Certain Representations.
 
     (a) Parent has not agreed, directly or indirectly, to retire or reacquire
all or part of the shares of Parent Common Stock.
 
     (b) Parent does not intend or plan to dispose of, or cause the Surviving
Corporation to dispose of, a significant part of the assets of the Surviving
Corporation within two years after the Effective Time, other than dispositions
in the Ordinary Course of Business of the Surviving Corporation and dispositions
intended to eliminate duplicate facilities or excess capacity.
 
                                      A-27
<PAGE>   138
 
                                   ARTICLE V
 
                     CONDUCT OF BUSINESS PENDING THE MERGER
 
     SECTION 5.01. Conduct of Business by the Target Pending the Merger. The
Target covenants and agrees that, except as otherwise contemplated by this
Agreement, unless Parent shall otherwise agree in writing, between the date of
this Agreement and the Effective Time, (a) the business of the Target shall be
conducted only in, and the Target shall not, and shall cause the Target
Subsidiaries not to, take any action except in, the Ordinary Course of Business,
(b) the Target shall use all reasonable efforts to preserve substantially intact
its business organization, to keep available the services of the current
officers, employees and consultants of the Target and to preserve the current
relationships of the Target with customers, suppliers and other persons with
which the Target has significant business relationships, (c) Target shall keep
in full force and effect liability and other insurance and bonds comparable in
amount and scope of coverage to that currently maintained and described in
Section 3.24 of the Target Disclosure Schedule, (d) Target shall not and shall
not permit the Target Subsidiaries to engage in any practice, take any action,
or enter into any transaction of the sort described in Section 3.08 above or
paragraph (e) below and Target shall not:
 
          (i) amend or otherwise change its certificate of incorporation or
     bylaws;
 
          (ii) issue, sell, pledge, dispose of, grant, encumber, or authorize
     the issuance, sale, pledge, disposition, grant or encumbrance of, (A) any
     shares of capital stock of the Target of any class, or any options,
     warrants, convertible securities or other rights of any kind to acquire any
     shares of such capital stock, or any other ownership interest (including
     without limitation, any phantom interest), of the Target (except for (i)
     the issuance of shares of capital stock issuable pursuant to currently
     outstanding Target Options and rights pursuant to Plans or Other Benefit
     Obligations currently in effect on the date hereof and described in Section
     3.10 of the Target Disclosure Schedule or (ii) the granting of Target
     Options pursuant to offer letters for employment outstanding on the date
     hereof for an aggregate of 65,500 shares of Target Stock), or (B) any of
     the Target's assets, except for sales in the Ordinary Course of Business;
 
          (iii) declare, set aside, make or pay any dividend or other
     distribution, payable in cash, stock, property or otherwise, with respect
     to any of its capital stock;
 
          (iv) reclassify, combine, split, divide or redeem, purchase or
     otherwise acquire, directly or indirectly, any of its capital stock;
 
          (v) (A) acquire (including without limitation, by merger,
     consolidation, or acquisition of stock or assets) any interest in any
     corporation, limited liability company, partnership, joint venture, other
     business organization or any division thereof or any assets, other than the
     acquisition of assets in the Ordinary Course of Business, (B) incur any
     indebtedness for borrowed money or issue any debt securities or assume,
     guarantee or endorse, or otherwise as an accommodation become responsible
     for, the obligations of any Person, or make any loans or advances other
     than (I) indebtedness owed to Parent or (II) advances to employees or the
     Target Subsidiaries made in the Ordinary Course of Business, (C) enter into
     any Contract material to the business, results of operations or financial
     condition of the Target other than in the Ordinary Course of Business, (D)
     authorize any capital expenditure, other than capital expenditures set
     forth in Section 5.01(e)(v)(D) of the Target Disclosure Schedule or (E)
     enter into or amend any Contract with respect to any matter set forth in
     this subsection (v);
 
          (vi) (A) increase the compensation payable or to become payable to any
     director, officer or other employee, or grant any bonus (except bonuses
     under existing Target Plans in ordinary course of business consistent with
     past practices), to, or grant any severance or termination pay to, or enter
     into any employment or severance Contract with any director, officer or
     other employee or enter into any collective bargaining Contract, except in
     accordance with existing terms of the current Target Plan consistent with
     past practices or (B) establish, adopt, enter into or amend any Plan or
     Other Benefit Obligation (as defined in Section 3.10) or trust or fund for
     the benefit of any director, officer or class of employees except as may be
     required by applicable Law;
 
                                      A-28
<PAGE>   139
 
          (vii) settle or compromise any pending or Threatened litigation which
     is material or which relates to the Transactions contemplated hereby
     without the prior written consent of Parent, which consent shall not be
     unreasonably withheld;
 
          (viii) grant or convey to any Person any rights, including, but not
     limited to, by way of sale, license or sub-license, in any of the
     Intellectual Property Assets;
 
          (ix) enter into any Contract with any Person for the sale, licensing,
     development, marketing, distribution, manufacture or commercial
     exploitation of any of the Target Products or the Intellectual Property
     Assets, except in connection with the sale of Target Products made in the
     Ordinary Course of Business;
 
          (x) abandon, or fail to pay any maintenance fees, or fail to renew any
     Intellectual Property Asset registration, or application for any of the
     foregoing, or license agreement, owned by the Target;.
 
          (xi) (A) change any of its methods of accounting in effect at December
     31, 1996 or (B) make or rescind any express or deemed election relating to
     taxes, settle or compromise any claim relating to taxes, or change any of
     its methods of reporting income or deductions for federal income tax
     purposes from those employed in the preparation of the federal income tax
     returns for the taxable year ending December 31, 1996, except, in the case
     of (A) or (B), as may be required by Law, the Internal Revenue Service or
     GAAP;
 
          (xii) take any action or fail to take any action which to Target's
     Knowledge, would reasonably be expected to have a Target Material Adverse
     Effect prior to or after the Effective Time or would reasonably be expected
     to adversely effect the ability of the Target prior to the Effective Time,
     or Parent or any of its subsidiaries after the Effective Time, to obtain
     consents of third parties or approvals of Governmental Authorities required
     to consummate the Transactions;
 
          (xiii) exercise the right to cancel any of the Target Options for
     Messrs. Berger, Foley, Gonzalez or Rosen or any other employees of Target
     in exchange for cash as described in Section 13(d) of the 1995 Stock Option
     Plan and their stock option agreements with Target or take any action to
     accelerate the time or times at which a Target Option may be exercised in
     whole or in part; or
 
          (xiv) agree in writing or otherwise to do any of the foregoing.
 
                                   ARTICLE VI
 
                             ADDITIONAL AGREEMENTS
 
     SECTION 6.01. Registration Statement; Proxy Statement. (a) Parent shall use
its reasonable efforts to prepare and file with the SEC within twenty-one (21)
days of the date of this Agreement (after approval of Target and its counsel,
which approval shall not be unreasonably withheld) a registration statement on
Form S-4 (together with all amendments thereto, the "Registration Statement")
including therein a combined proxy statement to be sent to the stockholders of
Target (the "Proxy Statement") and Prospectus, in connection with the
registration under the Securities Act of the shares of Parent Common Stock to be
issued to the stockholders of Target pursuant to the Merger. Parent and Target
each shall use all reasonable efforts to cause the Registration Statement to
become effective as promptly as practicable, and, prior to the effective date of
the Registration Statement, Parent shall take all or any action required under
any applicable federal or state securities laws in connection with the issuance
of shares of Parent Common Stock pursuant to the Merger. Each of Target and
Parent shall pay its own expenses incurred in connection with the Registration
Statement, Proxy Statement and Target's Stockholder Meeting including without
limitation, the fees and disbursements of their respective counsel, accountants
and other representatives, except that Parent shall pay any printing, filing and
other fees and expenses incurred in connection therewith. Target shall furnish
all information concerning Target as Parent may reasonably request in connection
with such actions and the preparation of the Registration Statement and Proxy
Statement. As promptly as practicable after the Registration Statement shall
have become effective, Target shall mail the Proxy Statement to the Target
 
                                      A-29
<PAGE>   140
 
Stockholders. The Proxy Statement shall include the unanimous recommendation of
the Board of Directors of Target in favor of the Merger.
 
     No amendment or supplement to the Registration Statement or the Proxy
Statement will be made by Parent or Target without the approval of the other
party, which shall not be unreasonably withheld. Parent and Target each will
advise the other, promptly after it receives notice thereof, of the time when
the Registration Statement has become effective or any supplement or amendment
has been filed, the issuance of any stop order, the suspension of the
qualification of the Parent Common Stock issuable in connection with the Merger
for offering or sale in any jurisdiction, or any request by the SEC for
amendment of the Proxy Statement or the Registration Statement or comments
thereon and responses thereto or requests by the SEC for additional information.
 
     Parent shall promptly prepare and submit to Nasdaq a listing application
covering the shares of Parent Common Stock issuable in the Merger, and shall use
its reasonable Best Efforts to obtain, prior to the Effective Time, approval for
the listing of such Parent Common Stock on Nasdaq, subject to official notice of
issuance, and Target shall cooperate with Parent with respect to such listing.
 
     (b) Parent represents, warrants and agrees that the information supplied by
Parent for inclusion in the Registration Statement and the Proxy Statement shall
not, at (i) the time the Registration Statement is declared effective, (ii) the
time the Proxy Statement (or any amendment thereof or supplement thereto) is
first mailed to the Target Stockholders, (iii) the time of Target's Stockholder
Meeting, and (iv) the Effective Time, contain any statement which, at such time
and in light of the circumstances under which it is made, is false or misleading
with respect to any material fact, or omit to state any material fact required
to be stated therein, or necessary in order to make the statements therein not
false or misleading. If at any time prior to the Effective Time any event or
circumstance relating to Parent or Parent Sub, or their respective officers or
directors, should be discovered by Parent which should be set forth in an
amendment or a supplement to the Registration Statement or Proxy Statement,
Parent shall promptly inform Target. Notwithstanding the foregoing, Parent and
Parent Sub make no representation or warranty with respect to any information
supplied by Target or any of its representatives which is contained in the
Registration Statement or Proxy Statement. All documents that Parent is
responsible for filing with the SEC in connection with the Transactions
contemplated herein will comply as to form and substance in all material aspects
with the applicable requirements of the Securities Act and the rules and
regulations promulgated thereunder and the Exchange Act and the rules and
regulations promulgated thereunder.
 
     (c) Target represents, warrants and agrees that the information supplied by
Target for inclusion in the Registration Statement and the Proxy Statement shall
not, at (i) the time the Registration Statement is declared effective, (ii) the
time the Proxy Statement (or any amendment thereof or supplement thereto) is
first mailed to the Target Stockholders, (iii) the time of Target's Stockholder
Meeting, and (iv) the Effective Time, contain any statement which, at such time
and in light of the circumstances under which it is made, is false or misleading
with respect to any material fact, or omit to state any material fact required
to be stated therein, or necessary in order to make the statements therein not
false or misleading. If at any time prior to the Effective Time any event or
circumstance relating to Target, or its officers or directors, should be
discovered by Target which should be set forth in an amendment or a supplement
to the Registration Statement or Proxy Statement, Target shall promptly inform
Parent. Notwithstanding the foregoing, Target makes no representation or
warranty with respect to any information supplied by Parent or Parent Sub or any
of their representatives in the Registration Statement or Proxy Statement.
 
     (d) Target, Parent and Parent Sub each hereby (i) consents to the use of
its name and, on behalf of its subsidiaries and affiliates, the names of such
subsidiaries and affiliates and to the inclusion of financial statements and
business information relating to such party and its subsidiaries and affiliates
(in each case, to the extent required by applicable securities laws) in the
Registration Statement and the Proxy Statement, (ii) agrees to use all
reasonable efforts to obtain the written consent of any Person retained by it
which may be required to be named (as an expert or otherwise) in the
Registration Statement or the Proxy Statement, and (iii) agrees to cooperate,
and agrees to use all reasonable efforts to cause its subsidiaries and
affiliates to cooperate, with any legal counsel, investment banker, accountant
or other agent or representative retained by
 
                                      A-30
<PAGE>   141
 
any of the parties in connection with the preparation of any and all information
required, as determined after consultation with each party's counsel, to be
disclosed by applicable securities laws in the Registration Statement or the
Proxy Statement.
 
     SECTION 6.02. Target's Stockholder Meeting. Target shall call and hold a
meeting of its stockholders (the "Target's Stockholder Meeting") as promptly as
practicable for the purpose of voting upon the approval of this Agreement and
the Merger, and Target shall use all commercially reasonable efforts to hold
Target's Stockholder Meeting as soon as practicable after the date on which the
Registration Statement becomes effective. Target shall use all commercially
reasonable efforts to solicit from the Target Stockholders proxies in favor of
the approval of this Agreement and the Merger and waivers of liquidation rights
by Target Stockholders holding Target Preferred Stock and shall take all other
actions reasonably necessary or advisable to secure the vote or consent of
Target Stockholders required by Delaware Law and the Target's certificate of
incorporation (including the Certificates of Designations) to obtain such
approvals (including unanimously recommending such approval). Target shall
request the holders of Target Preferred Stock also to waive any liquidation
rights provided for in Target's certificate of incorporation (including the
Certificates of Designations).
 
     SECTION 6.03. Appropriate Action; Consents; Filings. (a) Target, Parent and
Parent Sub shall use their Best Efforts to (i) take, or cause to be taken, all
appropriate action, and do, or cause to be done, all things necessary, proper or
advisable under applicable Law or required to be taken by any Governmental
Authority or otherwise to consummate and make effective the Transactions as
promptly as practicable, (ii) obtain from any Governmental Authorities any
Consents or other Governmental Authorizations required to be obtained or made by
Parent or Target or any of their subsidiaries in connection with the
authorization, execution and delivery of this Agreement and the consummation of
the Transactions, including without limitation, the Merger, and (iii) as
promptly as practicable, make all necessary filings, and thereafter make any
other required submissions, with respect to this Agreement and the Merger
required under (A) the Securities Act and the Exchange Act, and any other
applicable federal or state securities Laws, (B) the rules and regulations of
Nasdaq, (C) Delaware Law, (D) the HSR Act and any related governmental request
thereunder, and (E) any other applicable Law; provided that Parent and Target
shall cooperate with each other in connection with the making of all such
filings, including providing copies of all such documents to the non-filing
party and its advisors prior to filing and, if requested, accepting all
reasonable additions, deletions or changes suggested in connection therewith.
Target and Parent shall use reasonable Best Efforts to furnish to each other all
information required for any application or other filing to be made pursuant to
the rules and regulations of any applicable Law (including all information
required to be included in the Registration Statement and the Proxy Statement)
in connection with the Transactions contemplated by this Agreement.
 
     (b)  (i) Each of Parent and Target shall give (or shall cause their
respective subsidiaries to give) any notices to third parties, and use, and
cause their respective subsidiaries to use, their commercially reasonable
efforts to obtain any third party Consents (including those set forth in Section
3.05), (A) necessary to consummate the Transactions, (B) disclosed or required
to be disclosed in Target Disclosure Schedule or the Parent Disclosure Schedule
or (C) required to prevent a Material Adverse Effect from occurring prior to or
after the Effective Time.
 
          (ii) In the event that Parent or Target shall fail to obtain any third
     party Consent described in subsection (b)(i) above, it shall use its Best
     Efforts, and shall take any such actions reasonably requested by the other
     party, to minimize any adverse effect upon Target and Parent, their
     respective subsidiaries, and their respective businesses resulting, or
     which could reasonably be expected to result after the Effective Time, from
     the failure to obtain such Consent.
 
     (c) From the date of this Agreement until the Effective Time, each party
shall promptly notify the other party of any pending, or to the Knowledge of the
first party, Threatened Proceeding by or before any Governmental Authority or
any other Person (i) challenging or seeking material Damages in connection with
the Merger or the conversion of Target Stock into Parent Common Stock pursuant
to the Merger or (ii) seeking to restrain or prohibit the consummation of the
Merger or otherwise limit the right of Parent or Parent Sub to own or operate
all or any portion of the businesses or assets of Target, which in either case
is
 
                                      A-31
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reasonably likely to have a Material Adverse Effect on Target prior to the
Effective Time, or a Material Adverse Effect on Parent or Parent Sub (including
the Surviving Corporation) after the Effective Time.
 
     SECTION 6.04. Access to Information; Confidentiality. Subject to the
Non-Disclosure Agreement dated October 21, 1996 between Parent and Target (the
"Non-Disclosure Agreement"), between the date of this Agreement and the Closing
Date, Target will (a) afford Parent and its representatives and prospective
lenders and their representatives full and free access to Target's personnel,
properties, Contracts, books and records, and other documents and data, (b)
furnish Parent and its advisors with copies of all such Contracts, books and
records, and other existing documents and data as Parent may reasonably request,
and (c) furnish Parent and its advisors with such additional financial,
operating and other data and information as Parent may reasonably request.
 
     SECTION 6.05. No Solicitation. (a) Target shall not, directly or
indirectly, negotiate with any Person other than Parent or Parent Sub with
respect to the acquisition of Target or the shares of Target Stock and it will
not, and will not permit any of its officers, directors, employees, agents or
representatives (including without limitation, investment bankers, attorneys and
accountants) ("Agents") to (i) initiate contact with, (ii) make, solicit or
encourage any inquiries or proposals, (iii) enter into, or participate in, any
discussions or negotiations with, (iv) disclose, directly or indirectly, any
information not customarily disclosed concerning the business and properties of
Target or the Target Subsidiaries to or (v) afford any access to any of Target's
or the Target Subsidiaries' properties, books and records to any Person in
connection with any possible proposal relating to (x) the disposition of their
respective businesses or substantially all or a significant portion of their
assets, (y) the acquisition of equity or debt securities of Target or the Target
Subsidiaries, or (z) the merger, share exchange or business combination, or
similar acquisition transaction of or involving Target or the Target
Subsidiaries (each of (x), (y) and (z), a "Takeover Proposal") with any Person
other than Parent or Parent Sub; provided, however, that if at any time prior to
the receipt of the votes of the Target Stockholders necessary to approve the
Merger pursuant to Section 6.02, the Board of Directors of Target determines in
good faith, based on the written advice of outside counsel, that it is necessary
to do so in order to comply with its fiduciary duties to the Target Stockholders
under Delaware Law, Target (and its Agents) may, in response to an unsolicited
Takeover Proposal (a "Superior Proposal") that involves consideration to the
Target Stockholders with a value that Target's Board of Directors reasonably
believes, after receiving written advice from Target Banker, is superior to the
consideration provided for in the Merger and after taking into consideration the
liability in respect of the Transaction Fee, and subject to compliance with
Section 6.05(b), furnish information with respect to Target pursuant to a
confidentiality agreement with terms substantially the same as the terms of the
Confidentiality Agreement to any Person making such proposal and participate in
negotiations regarding such proposal. Target shall immediately cease and cause
to be terminated any existing solicitation, initiation, encouragement, activity,
discussion or negotiation with any parties conducted heretofore by Target with
respect to any Takeover Proposal existing on the date hereof. Without limiting
the foregoing, it is understood that any violation of the restrictions set forth
in the preceding sentence by Target, the Target Subsidiaries or any Agent of
Target or the Target Subsidiaries, whether or not such Person is purporting to
act on behalf of Target or the Target Subsidiaries or otherwise, shall be deemed
to be a breach of this Section 6.05(a) by Target.
 
     (b) In addition to the obligations of Target set forth in paragraph (a) of
this Section 6.05, Target promptly shall advise Parent orally and in writing of
any request for information or of any Takeover Proposal or any inquiry with
respect to or which could reasonably be expected to lead to any Takeover
Proposal, the identity of the Person making any such request, Takeover Proposal
or inquiry and all the terms and conditions thereof. Target will keep Parent
fully informed of the status and details (including amendments or proposed
amendments) of any such request, Takeover Proposal or inquiry.
 
     (c) Neither the Board of Directors of Target nor any committee thereof
shall (x) withdraw or modify, or propose to withdraw or modify, in a manner
adverse to Parent, the approval (including, without limitation, either the Board
of Directors' or any committee's resolution thereof providing for such approval)
or recommendation by such Board of Directors or such committee of this Agreement
or the Merger or (y) approve or recommend, or propose to approve or recommend,
any Takeover Proposal, except in
 
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<PAGE>   143
 
connection with a Superior Proposal and then only at or after the termination of
this Agreement pursuant to Section 8.01(f).
 
     SECTION 6.06. Obligations of Parent Sub. Parent shall take all action
necessary to cause Parent Sub to perform its obligations under this Agreement
and to consummate the Merger on the terms and subject to conditions set forth in
this Agreement.
 
     SECTION 6.07. Public Announcements. (a) Each of Parent and Target shall
consult with the other before issuing any press release or otherwise making any
public statements with respect to this Agreement or any Transaction and shall
not issue any such press release or make any such public statement without the
prior written consent of the other party, except as may be required by Law or
any listing agreement with the National Association of Securities Dealers, Inc.,
and (b) prior to the Effective Time, Target will not issue any other press
release or otherwise make any public statements regarding its business without
the prior written consent of Parent, which consent shall not be unreasonably
withheld.
 
     SECTION 6.08. Employee Matters. Parent shall be permitted, on and after the
date hereof, to offer to and endeavor to enter into employment agreements at the
Effective Time with the officers and employees of Target on terms reasonably
satisfactory to Parent.
 
     SECTION 6.09. Further Action. At any time and from time to time, each party
to this Agreement agrees, subject to the terms and conditions of this Agreement,
to take such reasonable actions and to execute and deliver such documents as may
be necessary to effectuate the purposes of this Agreement at the earliest
practicable time.
 
     SECTION 6.10. Registration on Form S-8. Parent shall prepare and file with
the SEC, and shall use its Best Efforts to cause to become effective, a
registration statement on Form S-8 with respect to the shares of Parent Common
Stock issuable upon exercise of the Substitute Options.
 
     SECTION 6.11. Tax-Free Reorganization. Parent and Target further agree that
each shall use its Best Efforts to cause the Merger to be treated as a
reorganization qualifying under the provisions of Section 368(a) of the Code.
 
     SECTION 6.12. Unaudited Financial Information. Until the Effective Time,
Target will cause to be prepared (and furnish to Parent) as promptly as possible
on a monthly basis unaudited balance sheets, commencing with September 30, 1997,
and the related unaudited statements of operations, statements of stockholders'
equity and statements of cash flows for the respective one-month periods (such
balance sheets, and related statements being collectively referred to in this
Agreement as the "Unaudited Monthly Statements"). The Unaudited Monthly
Statements will be prepared from the books and records of Target and will fairly
present, in all material respects, the financial position of Target and the
results of its operations and its cash flows as of and for the respective time
periods in accordance with internal Target accounting methods and standards
currently used.
 
     SECTION 6.13. Letters of Accountants. Target shall use its Best Efforts to
cause to be delivered to Parent "cold comfort" letters of KPMG Peat Marwick LLP,
its independent public accountants, dated the date on which the Registration
Statement shall become effective and as of the Effective Time, respectively, and
addressed to Parent, in form and substance reasonably satisfactory to Parent and
reasonably customary in scope and substance for letters delivered by independent
public accountants in connection with registration statements similar to the
Registration Statement and Transactions such as those contemplated by this
Agreement.
 
     SECTION 6.14. Update Disclosure; Breaches. From and after the date of this
Agreement until the Effective Time, each party hereto shall promptly notify the
other party hereto by written update to its Disclosure Schedule of (i) the
occurrence, or non-occurrence, of any event the occurrence, or non-occurrence,
of which would, or would reasonably be likely to, cause any condition to the
obligations of any party to effect the Merger and the other Transactions
contemplated by this Agreement not to be satisfied, or (ii) the failure of
Target or Parent, as the case may be, to comply with or satisfy in any material
respect any covenant, condition or agreement to be complied with or satisfied by
it pursuant to this Agreement which would, or
 
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<PAGE>   144
 
would reasonably be likely to, result in any condition to the obligations of any
party to effect the Merger and the other Transactions contemplated by this
Agreement not to be satisfied. No disclosure by any party pursuant to this
Section 6.14 will be deemed to amend or supplement either the Target Disclosure
Schedule or the Parent Disclosure Schedule or prevent or cure any inaccuracy or
Breach of representation or warranty, or Breach of any covenant or obligation
hereunder.
 
     SECTION 6.15. Affiliate Agreements. Target shall use its Best Efforts to
deliver or cause to be delivered to Parent an executed affiliate agreement,
substantially in the form of Exhibit B attached hereto (an "Affiliate
Agreement"), from (i), at least thirty (30) days prior to the Closing Date, each
of the officers and directors of Target specified in Section 6.15 of the Target
Disclosure Schedule and (ii) any Person who may be deemed to have become an
affiliate of Target (under SEC Rule 145 of the Securities Act) after the date of
this Agreement and on or prior to the Effective Time as soon as practicable
after the date on which such Person attains such status (each, a "Target
Affiliate"). Parent shall be entitled to place appropriate legends on the
certificates evidencing any Parent Common Stock to be received by such Target
Affiliates pursuant to the terms of this Agreement, and to issue appropriate
stop transfer instructions to the transfer agent for the Parent Common Stock,
consistent with the terms of the Affiliate Agreements.
 
     SECTION 6.16. Voting Agreements. Target shall cause each director and
officer of Target to execute and deliver to Parent and, with respect to the
Target Stockholders listed on Section 6.16 of the Target Disclosure Schedule,
use its Best Efforts to deliver or cause to be delivered, by the date of this
Agreement, voting agreements and irrevocable proxies in the forms annexed hereto
as Exhibit C (the "Voting Agreements"), agreeing, among other things, to vote in
favor of the Merger.
 
     SECTION 6.17. DSC Special Celcore Incentive Plan. As of the Effective Time,
Parent shall adopt the DSC Special Celcore Incentive Plan in the form annexed
hereto as Exhibit H.
 
                                  ARTICLE VII
 
                       CONDITIONS PRECEDENT TO THE MERGER
 
     SECTION 7.01. Conditions to the Obligations of Each Party. The obligations
of the Target, Parent and Parent Sub to consummate the Merger are subject to the
satisfaction of the following conditions:
 
          (a) Effectiveness of Registration Statement. The Registration
     Statement shall have been declared effective by the SEC under the
     Securities Act. No stop order suspending the effectiveness of the
     Registration Statement shall have been issued by the SEC and no Proceedings
     for that purpose shall have been initiated or, to the Knowledge of Parent
     or the Target, Threatened by the SEC. Parent shall have received all other
     federal or state securities permits and other Governmental Authorizations
     necessary to issue Parent Common Stock in exchange for Target Stock and to
     consummate the Merger.
 
          (b) Stockholder Approval. This Agreement and the Transactions
     contemplated hereby shall have been approved and adopted by the affirmative
     vote of the Target Stockholders in accordance with Delaware Law and the
     Target's certificate of incorporation (including the Certificates of
     Designations) and bylaws and the rules of the NASD and the Target
     Stockholders holding Target Preferred Stock shall have waived the
     liquidation rights provided for in the Target's certificate of
     incorporation (including the Certificates of Designations).
 
          (c) No Challenge. There shall not be pending any Proceeding by any
     Governmental Authority (i) challenging or seeking material Damages in
     connection with the Merger or the conversion of Target Stock into Parent
     Common Stock or (ii) seeking to restrain or prohibit the consummation of
     the Merger or the Transactions or otherwise limiting the right of Parent or
     its subsidiaries to own or operate all or any portion of the business or
     assets of the Target at and after the Effective Time.
 
          (d) No Order. No Governmental Authority shall have enacted, issued,
     promulgated, enforced or entered any Order which is in effect and which has
     the effect of making the Merger illegal or otherwise prohibiting
     consummation of the Merger or the other Transactions contemplated herein.
 
                                      A-34
<PAGE>   145
 
          (e) Quotation on Nasdaq. Parent and the Target shall have received
     from Nasdaq evidence that the shares of Parent Common Stock to be issued to
     the Target Stockholders in the Merger have been approved for quotation on
     Nasdaq immediately following the Effective Time.
 
          (f) HSR. Any applicable waiting period under the HSR Act relating to
     the Merger shall have expired or been terminated.
 
          (g) Other Approvals. All Consents and waivers required to be obtained,
     which are set forth in Section 7.01(g) of the Target Disclosure Schedule,
     and all filings or notices required to be made, by Parent, Parent Sub
     and/or the Target prior to consummation of the Transactions (other than
     filing an appropriate Certificate of Merger with the Secretary in
     accordance with Delaware Law) shall have been obtained from and made with
     all required Governmental Authorities.
 
          (h) Tax Opinions. Parent and the Target shall have received from Baker
     & McKenzie and Powell, Goldstein, Frazer & Murphy LLP opinions to be filed
     with the SEC as exhibits to the Registration Statement, in form and
     substance satisfactory to Parent and the Target, covering the qualification
     of the Merger as a tax-free reorganization under the Code and related tax
     matters as set forth in the forms of opinion attached hereto as Exhibits D
     and E, respectively.
 
     SECTION 7.02. Conditions to the Obligations of Parent and Parent Sub. Each
of Parent's and Parent Sub's obligations to consummate the Merger and to take
the other actions required to be taken by each of Parent and Parent Sub at the
Closing is subject to the satisfaction, at or prior to the Closing, of each of
the following conditions (any of which may be waived by Parent and Parent Sub,
in whole or in part):
 
          (a) Accuracy of Representations. Each of the representations and
     warranties of Target contained in this Agreement, without giving effect to
     any update to the Target Disclosure Schedule under Section 6.14, shall be
     true and correct in all material respects as of the date of this Agreement
     and shall be true and correct in all material respects (except that where
     any statement in a representation or warranty expressly includes a standard
     of materiality, such statement shall be true and correct) as of the
     Effective Time as though made as of the Effective Time, except that those
     representations and warranties which address matters only as of a
     particular date shall remain true and correct in all material respects
     (except that where any statement in a representation or warranty expressly
     includes a standard of materiality, such statement shall be true and
     correct) as of such date. Parent shall have received a certificate of the
     Chief Executive Officer and Chief Financial Officer of the Target to that
     effect.
 
          (b) Target's Performance. All of the covenants and obligations that
     Target is required to perform or to comply with pursuant to this Agreement
     at or prior to the Effective Time (considered collectively), and each of
     those covenants and obligations (considered individually), must have been
     duly performed and complied in all material respects with and each document
     required to be delivered must have been delivered.
 
          (c) Consents. Target shall have obtained the Consent of each other
     Person whose Consent shall be required in connection with the Merger under
     all loan or credit arrangements, notes, mortgages, indentures, leases or
     other Contracts to which Target is a party other than Consents which the
     failure to obtain would not have a Material Adverse Effect on Target or
     Parent.
 
          (d) Affiliate Agreements. Parent shall have received from each Target
     Affiliate and any other Person who may be deemed to have become an
     affiliate of the Target (under SEC Rule 145 of the Securities Act) after
     the date of this Agreement and on or prior to the Effective Time a signed
     Affiliate Agreement.
 
          (e) Opinion of Counsel. Parent shall have received from Powell,
     Goldstein, Frazer and Murphy LLP one or more opinions dated the Closing
     Date, in form and substance reasonably satisfactory to Parent, covering the
     matters set forth in the form of opinion attached hereto as Exhibit F.
 
          (f) Accountant Letters. Parent shall have received from the Target
     "cold comfort" letters of KPMG Peat Marwick LLP of the kind contemplated by
     the Statement of Auditing Standards with
 
                                      A-35
<PAGE>   146
 
     respect to Letters to Underwriters promulgated by the American Institute of
     Certified Public Accountants (the "AICPA Statement") dated the date on
     which the Registration Statement shall become effective and the Effective
     Time, respectively, and addressed to Parent, in form and substance
     satisfactory to Parent, in connection with the procedures undertaken by
     them with respect to the Financial Statements of the Target contained in
     the Registration Statement and the other matters contemplated by the AICPA
     Statement and customarily included in comfort letters relating to
     transactions similar to the Merger.
 
          (g) Target Material Adverse Effect. After the date hereof, there shall
     not have been a Target Material Adverse Effect, it being understood that
     the matters described in the Target Disclosure Schedule as of the date
     hereof (but not thereafter updated pursuant to Section 6.14 hereof) shall
     not be deemed a Target Material Adverse Effect for purposes of this
     Section. Parent shall have received a certificate of the Chief Executive
     Officer and Chief Financial Officer of the Target to that effect.
 
          (h) Dissenting Shareholders and Fractional Shares; Waiver of
     Liquidation Rights. The Target Stockholders approve the Merger and the
     Transactions contemplated hereby and shares of Target Stock representing,
     in the aggregate, not more than ten percent (10%) of the outstanding shares
     of Target Stock are (i) subject to claims for dissenter's rights as
     provided for under Delaware Law, or (ii) converted into cash pursuant to
     Section 2.02(e) as a result of being fractional shares. The Target
     Stockholders holding Target Preferred Stock shall have waived any rights to
     receive cash or other property upon a liquidation of the Target as provided
     in any of the Certificates of Designations.
 
     SECTION 7.03. Conditions to the Obligations of Target. Target's obligation
to consummate the Merger and to take the other actions required to be taken by
the Target at the Closing is subject to the satisfaction, at or prior to the
Closing, of each of the following conditions (any of which may be waived by the
Target, in whole or in part):
 
          (a) Accuracy of Representations. Each of the representations and
     warranties of Parent and Parent Sub contained in this Agreement, without
     giving effect to any update to the Parent Disclosure Schedule under Section
     6.14, shall be true and correct in all material respects (except that where
     any statement in a representation or warranty expressly includes a
     statement of materiality, such statement shall be true and correct) as of
     the date hereof and as of the Effective Time, as though made on and as of
     the Effective Time, except that those representations and warranties which
     address matters only as of a particular date shall remain true and correct
     in all material respects (except that where any statement in a
     representation or warranty expressly includes a standard of materiality,
     such statement shall be true and correct) as of such date. Target shall
     have received a certificate of an executive officer of each of Parent and
     Parent Sub, respectively, to that effect.
 
          (b) Parent's and Parent Sub's Performance. All of the covenants and
     obligations that each of Parent and Parent Sub is required to perform or to
     comply with pursuant to this Agreement at or prior to the Closing
     (considered collectively), and each of these covenants and obligations
     (considered individually), must have been performed and complied with in
     all material respects.
 
          (c) Opinion of Counsel. Target shall have received from Baker &
     McKenzie one or more opinions dated the Closing Date, in form and substance
     reasonably satisfactory to Target, covering the matters set forth in the
     form of opinion attached hereto as Exhibit G.
 
          (d) Parent Material Adverse Effect. After the date hereof, there shall
     not have been a Material Adverse Effect of Parent, it being understood that
     the matters described in the Parent Disclosure Schedule as of the date
     hereof (but not thereafter updated pursuant to Section 6.14 hereof) shall
     not be deemed a Material Adverse Effect of Parent for purposes of this
     Section. Target shall have received a certificate of an executive officer
     of Parent to that effect.
 
                                      A-36
<PAGE>   147
 
                                  ARTICLE VIII
 
                                  TERMINATION
 
     SECTION 8.01. Termination. This Agreement may be terminated and the Merger
and the other Transactions may be abandoned at any time prior to the Effective
Time, notwithstanding any requisite approval and adoption of this Agreement and
the Transactions, as follows:
 
          (a) by mutual written consent duly authorized by the Boards of
     Directors of each of Parent, Parent Sub and Target;
 
          (b) by either Parent or Target, if either (i) the Effective Time shall
     not have occurred on or before January 31, 1998 (or such later date as
     shall have been agreed to in writing by Parent and Target); provided,
     however, that the right to terminate this Agreement under this Section
     8.01(b) shall not be available to any party whose failure to fulfill any
     obligation under this Agreement has been the cause of, or resulted in, the
     failure of the Effective Time to occur on or before such date; or (ii)
     there shall be any Order which is final and nonappealable preventing the
     consummation of the Merger, except if the party relying on such Order has
     not complied with its obligations under Section 6.03(a);
 
          (c) by either Parent or Target, if (i) the Target Stockholders shall
     have failed to approve and adopt this Agreement, the Merger and other
     Transactions at a meeting duly convened therefor, or (ii) the condition
     precedent under Section 7.02(i) has not been fulfilled;
 
          (d) by Parent, upon a Breach of any representation, warranty, covenant
     or agreement on the part of Target set forth in this Agreement, or if any
     representation or warranty of Target is not true and correct in all
     material respects (except that where any statement in a representation or
     warranty expressly includes a standard of materiality, such statement shall
     be true and correct), in either case such that the conditions set forth in
     Sections 7.02(a) and (b) would not be satisfied, other than a Breach that
     would not have a Material Adverse Effect on Target (a "Terminating Target
     Breach"); provided, however, that, if such Terminating Target Breach is
     curable by the Target through the exercise of its Best Efforts and for so
     long as the Target continues to exercise such Best Efforts, Parent may not
     terminate this Agreement under Section 8.01(d); or
 
          (e) by Target, upon Breach of any representation, warranty, covenant
     or agreement on the part of Parent set forth in this Agreement, or if any
     representation or warranty of Parent is not true and correct in all
     material respects (except that where any statement in a representation or
     warranty expressly includes a standard of materiality, such statement shall
     be true and correct), in either case such that the conditions set forth in
     Sections 7.03(a) and (b) would not be satisfied, other than a Breach that
     would not have a Material Adverse Effect on Parent ("Terminating Parent
     Breach"); provided, however, that, if such Terminating Parent Breach is
     curable by Parent through the exercise of its Best Efforts and for so long
     as Parent continues to exercise such Best Efforts, the Target may not
     terminate this Agreement under this Section 8.01(e);
 
          (f) by Parent, if the Board of Directors of Target shall (i) withdraw
     its recommendation to the Target Stockholders to approve the Merger, or
     (ii) have recommended to the Target Stockholders any Business Combination
     Transaction (as defined below) or resolved to do so; or
 
          (g) by Target, if the Average Trading Price is less than $25.00 per
     share.
 
     SECTION 8.02. Fees and Expenses. (a) Target shall pay Parent a fee (an
"Transaction Fee") of $5,000,000, less any Specified Expenses (as defined below)
previously paid, if this Agreement is terminated pursuant to (i) Section 8.01(c)
and any Business Combination Transaction is thereafter consummated within twelve
(12) months of such termination or (ii) Section 8.01(f). As used herein, the
term "Business Combination Transaction" shall mean any of the following
involving Target: (A) any merger, consolidation, share exchange, business
combination or other similar transaction (other than the Transactions); (B) any
sale, lease, exchange, transfer or other disposition (other than a pledge or
mortgage) of 25% or more of the assets of Target and the Target Subsidiaries,
taken as a whole, in a single transaction or series of transactions; or (C) the
acquisition by a Person or any "group" (as such term is defined under Section
13(d) of the
 
                                      A-37
<PAGE>   148
 
Exchange Act and the rules and regulations thereunder) of beneficial ownership
of 33 1/3% or more of the shares of Target Stock, considered as a whole, whether
by tender offer, exchange offer or otherwise.
 
     (b) Parent shall be entitled to receive its Specified Expenses (but not the
Transaction Fee) up to $1,000,000 in immediately available funds in the event
that this Agreement is terminated pursuant to Section 8.01(d) and one-half
( 1/2) of its Specified Expenses up to $500,000 in immediately available funds
in the event the Agreement is terminated pursuant to Section 8.01(c). Target
shall be entitled to receive its Specified Expenses up to $500,000 in
immediately available funds in the event that this Agreement is terminated
pursuant to Section 8.01(e).
 
     (c) In the event of termination of this Agreement and the abandonment of
the Merger pursuant to Section 8.01, all obligations of the parties hereto shall
terminate except the obligations of the parties pursuant to this Section 8.02
and Sections 6.07, 10.01, 10.02, 10.03, 10.05, 10.08, 10.12, 10.13, 10.14 and
10.15 and pursuant to the Confidentiality Agreement. No termination of this
Agreement pursuant to Section 8.01(d) or 8.01(e) shall prejudice the ability of
a non-breaching party from seeking Damages to which such party would otherwise
be entitled from any other party for any breach of this Agreement including
without limitation, attorneys' fees and the right to pursue any remedy at law or
in equity. Notwithstanding the foregoing, if Parent is required to file suit to
seek the Transaction Fee or either Parent or the Target is required to file suit
to seek its Specified Expenses, and such party ultimately succeeds on the
merits, the party shall be entitled to all cost and expenses, including
attorneys' fees, which it has incurred in enforcing its rights under this
Section 8.02.
 
     (d) As used herein, "Specified Expenses" means all reasonable out-of-pocket
expenses and fees actually incurred by a Person or on its behalf in connection
with the Transactions prior to the termination of this Agreement (including
without limitation, all reasonable fees and expenses of counsel, financial
advisors, banks or other entities providing financing to such Person (including
financing, commitment and other fees payable thereto), accountants,
environmental and other experts and consultants to such Person and its
affiliates, all SEC or HSR Act related filing fees, and all printing and
advertising expenses) and in connection with the negotiation, preparation,
execution, performance and termination of this Agreement, the structuring of the
Transactions, any agreements relating thereto and any filings to be made in
connection therewith. Specified Expenses shall not include compensation of
employees of Parent or Target.
 
     SECTION 8.03. Amendment. This Agreement may be amended by the parties
hereto by action taken by or on behalf of their respective Boards of Directors
at any time prior to the Effective Time; provided, however, that, after the
approval and adoption of this Agreement and the Transactions by the Target
Stockholders, no amendment may be made which would violate Delaware Law. This
Agreement may not be amended except by an instrument in writing signed by the
parties hereto.
 
     SECTION 8.04. Waiver. At any time prior to the Effective Time, any party
hereto may (a) extend the time for the performance of any obligation or other
act of any other party hereto, (b) waive any inaccuracy in the representations
and warranties contained herein or in any document delivered pursuant hereto and
(c) waive compliance with any agreement or condition contained herein. Any such
extension or waiver shall be valid only if set forth in an instrument in writing
signed by the party or parties to be bound thereby.
 
                                      A-38
<PAGE>   149
 
                                   ARTICLE IX
 
                           ESCROW AND INDEMNIFICATION
 
     SECTION 9.01. Survival of Representations and Warranties. All of Target's
representations, warranties, covenants and agreements contained in this
Agreement or in any instrument delivered pursuant to this Agreement (including
without limitation, the Target Disclosure Schedule) relating to the Intellectual
Property Assets of Target, including without limitation pursuant to Sections
3.09, 3.12 and 3.20 shall survive the Merger and continue until 5:00 p.m.,
Dallas, Texas time, one year following the Closing Date, (the "Expiration
Date"). Except as provided in the immediately preceding sentence, none of the
Target's representations, warranties, covenants, and agreements shall survive
the Closing Date. None of Parent's representations, warranties, covenants and
agreements contained in this Agreement or in any instrument delivered pursuant
to this Agreement (including without limitation, the Parent Disclosure Schedule)
shall survive the Merger.
 
     SECTION 9.02. Parent Escrow Arrangements. (a) Parent Escrow Fund. At the
Effective Time the Target Stockholders (except Target Stockholders, in respect
of Dissenting Shares) will be deemed to have received and deposited with the
Escrow Agent (as defined below) that number of shares of Parent Common Stock
that is equal to their proportionate share of the Parent Escrow Amount (which
shares shall not include that portion of the Parent Escrow Amount which is
allocated for contribution by holders of Target Options assumed by Parent), plus
a proportionate share of any additional shares as may be issued to such Target
Stockholders in respect of such shares upon any stock split, stock dividend or
recapitalization effected by Parent after the Effective Time and prior to the
Expiration Date, without any act of any Target Stockholder. As soon as
practicable after the Effective Time, the Parent Escrow Amount, without any act
of any Target Stockholder, will be deposited with an institution designated by
Parent and reasonably acceptable to the Representative (as defined in Section
9.02(g) below)) as escrow agent (the "Escrow Agent"). The Parent Escrow Amount,
together with other shares deposited in respect of Target Options assumed by
Parent, plus a proportionate share of any additional shares as may be issued to
such Target Stockholders in respect of such shares upon any stock split, stock
dividend or recapitalization effected by Parent after the Effective Time and
prior to the Expiration Date, shall constitute an escrow fund (the "Parent
Escrow Fund") and shall be governed by the terms set forth herein and in an
escrow agreement to be agreed upon by the parties and to be entered into by and
among, Parent, the Representative and the Escrow Agent (the "Parent Escrow
Agreement"). The portion of the Parent Escrow Amount contributed on behalf of
each Target Stockholder shall be in proportion to the aggregate number of shares
of Parent Common Stock which such holder would otherwise be entitled under
Section 2.01, plus the number of Target Options subject to adjustment under this
Section 9.02 and Section 2.04(a)(iv). Upon the exercise of any Target Option
between the Effective Time and the Expiration Date, five percent (5%) of the
shares of Parent Common Stock issued upon such exercise shall be added and
deposited to the Parent Escrow Fund upon such exercise, and at the expiration of
the Escrow Period (as defined in Section 9.02(b)), any Target Options not so
exercised as of the expiration of the Escrow Period shall be adjusted in
accordance with Section 2.04(a)(iv). The Parent Escrow Fund shall be the sole
and exclusive remedy available to compensate Parent and its affiliates for any
claims, losses, liabilities, damages, deficiencies, costs and expenses,
including reasonable attorneys' fees and expenses, and expenses of investigation
and defense (hereinafter individually a "Loss" and collectively "Losses"),
incurred by Parent, its officers, directors, or affiliates (including the
Surviving Corporation) directly as a result of any inaccuracy or Breach of a
representation, warranty, covenant or agreement of Target contained in this
Agreement (without regard to any update or modification of the Target Disclosure
Schedule following the date of this Agreement), or any instrument delivered
pursuant to this Agreement relating to the Intellectual Property Assets of
Target, including without limitation pursuant to Sections 3.09, 3.12 and 3.20.
Parent shall act in good faith and in a commercially reasonable manner to
mitigate all Losses it may suffer. Parent may not receive any shares from the
Parent Escrow Fund (and no adjustment shall be made pursuant to Section
2.04(a)(iv)) unless and until Officer's Certificates (as defined in Section
9.02(d) below) identifying Losses have been delivered to the Escrow Agent as
provided in Section 9.02(e); in such case, Parent may recover from the Parent
Escrow Fund Losses to Parent (and adjustment may be made pursuant to Section
2.04(a)(iv)).
 
                                      A-39
<PAGE>   150
 
     (b) Escrow Period; Distribution upon Termination of Escrow Period. Subject
to the following requirements, the Parent Escrow Fund shall be in existence
immediately following the Effective Time and shall terminate at 5:00 p.m., Texas
time, on the Expiration Date (the "Escrow Period"). On the Expiration Date any
remaining shares comprising the Parent Escrow Fund less any Loss shall be
released from the Parent Escrow Fund and distributed to the Target Stockholders
and those individuals who have on or prior to the Expiration Date exercised the
Target Options assumed by Parent (the "Escrow Release"). Notwithstanding the
above, no Escrow Release shall occur and the Escrow Period shall not terminate
with respect to such amount (or some portion thereof) that is necessary in the
reasonable judgment of Parent, subject to the objection of the Representative
and the subsequent arbitration of the matter in the manner provided in Section
9.02(f) hereof, to satisfy any unsatisfied claims concerning facts and
circumstances existing prior to the contemplated date of the Escrow Release or
the termination of the Escrow Period, as the case may be, each as specified in
an Officer's Certificate delivered to the Escrow Agent prior to the contemplated
date of an Escrow Release or termination of the Escrow Period, as appropriate.
As soon as all such claims have been resolved, the Escrow Agent shall deliver to
the Target Stockholders the amount which is subject to an Escrow Release or at
the end of the Escrow Period, as appropriate the remaining portion of the Parent
Escrow Fund not required to satisfy such claims. Deliveries of Escrow Amounts to
the Target Stockholders and holders of Target Options pursuant to this Section
9.02(b) shall be made in proportion to their respective original contributions
to the Parent Escrow Fund.
 
     (c) Protection of Parent Escrow Fund.
 
          (i) Any shares of Parent Common Stock or other equity securities
     issued or distributed by Parent (including shares issued upon a stock
     split) ("New Shares") in respect of Parent Common Stock in the Parent
     Escrow Fund which have not been released from the Parent Escrow Fund shall
     be added to the Parent Escrow Fund and become a part thereof. New Shares
     issued in respect of shares of Parent Common Stock which have been released
     from the Parent Escrow Fund shall not be added to the Parent Escrow Fund
     but shall be distributed to the record holders thereof. Cash dividends on
     Parent Common Stock shall not be added to the Parent Escrow Fund and not
     distributed to the record holders thereof.
 
          (ii) Each Target Stockholder and each individual who, prior to the
     Expiration Date, has exercised the Target Options assumed by Parent shall
     have voting rights with respect to the shares of Parent Common Stock
     contributed to the Parent Escrow Fund by such party (and on any voting
     securities added to the Parent Escrow Fund in respect of such shares of
     Parent Common Stock).
 
     (d) Claims Upon Parent Escrow Fund.
 
          (i) Upon receipt by the Escrow Agent at any time on or before the last
     day of the Escrow Period, as appropriate, of a certificate signed by any
     officer of Parent (an "Officer's Certificate"): (A) stating that Parent has
     paid or properly accrued or reasonably anticipates that it will have to pay
     or accrue Losses, and (B) specifying in reasonable detail the individual
     items of Loss included in the amount so stated, the date each such item was
     paid or properly accrued, or the basis for such anticipated liability, and
     the nature of the misrepresentation, Breach of warranty or covenant to
     which such item is related, the Escrow Agent shall, subject to the
     provisions of Section 9.02(e) hereof, deliver to Parent out of the Parent
     Escrow Fund, as promptly as practicable, shares of Parent Common Stock held
     in the Parent Escrow Fund in an amount equal to such Losses.
 
          (ii) For the purposes of determining the number of shares of Parent
     Common Stock to be delivered to Parent out of the Parent Escrow Fund
     pursuant to Section 9.02(d)(i) hereof, the shares of Parent Common Stock
     and the adjustment to the number of Target Options issuable under Section
     2.04(a)(iv) shall be valued at the average of the reported last sale price
     of a share of Parent Common Stock as reported by Nasdaq for the 10
     consecutive trading days ending immediately preceding the second trading
     day before the date such determination is made. Parent and the
     Representative shall certify such value in a certificate signed by both
     Parent and the Representative, and shall deliver such certificate to the
     Escrow Agent.
 
                                      A-40
<PAGE>   151
 
          (iii) Notwithstanding the foregoing, Parent shall not be entitled to
     make a claim for payment of Losses under this Section 9.02(d) until Parent
     has suffered Losses of $100,000 in the aggregate and thereafter Parent
     shall be entitled to indemnification for all Losses without regard to such
     $100,000 threshold.
 
     (e) Objections to Claims. At the time of delivery of any Officer's
Certificate to the Escrow Agent, a duplicate copy of such certificate shall be
delivered by Parent to the Representative and for a period of thirty (30) days
after such delivery, the Escrow Agent shall make no delivery to Parent of any
Escrow Amounts pursuant to Section 9.02(d) hereof unless the Escrow Agent shall
have received written authorization from the Representative to make such
delivery. After the expiration of such thirty (30) day period, the Escrow Agent
shall make delivery of shares of Parent Common Stock from the Parent Escrow Fund
in accordance with Section 9.02(d) hereof, provided that no such payment or
delivery may be made if the Representative shall object in a written statement
(the "Representative Agent Notice") to the claim made in the Officer's
Certificate, and such statement shall have been delivered to the Escrow Agent,
with a copy to Parent, prior to the expiration of such thirty (30) day period.
 
     (f) Resolution of Conflicts; Arbitration.
 
          (i) In case the Representative shall so object in writing to any claim
     or claims made in any Officer's Certificate, the Representative and Parent
     shall attempt in good faith to agree upon the rights of the respective
     parties with respect to each of such claims. If the Representative and
     Parent should so agree, a memorandum setting forth such agreement shall be
     prepared and signed by both parties and shall be furnished to the Escrow
     Agent. The Escrow Agent shall be entitled to rely on any such memorandum
     and distribute shares of Parent Common Stock from the Parent Escrow Fund in
     accordance with the terms thereof.
 
          (ii) If no such agreement is reached within thirty (30) days following
     receipt by the Escrow Agent of the Representative Agent Notice, either
     Parent or the Representative may demand arbitration of the matter unless
     the amount of the Loss is at issue in pending litigation with a third
     party, in which event arbitration shall not be commenced until such amount
     is ascertained or both parties agree to arbitration; and in either such
     event the matter shall be settled by arbitration conducted by three
     arbitrators. Parent and the Representative shall each select one
     arbitrator, and the two arbitrators so selected shall select a third
     arbitrator, each of which arbitrators shall be independent and have at
     least ten years relevant experience. The arbitrators shall set a limited
     time period and establish procedures designed to reduce the cost and time
     for discovery while allowing the parties an opportunity, adequate in the
     sole judgment of the arbitrators, to discover relevant information from the
     opposing parties about the subject matter of the dispute. The arbitrators
     shall rule upon motions to compel or limit discovery and shall have the
     authority to impose sanctions, including attorneys' fees and costs, to the
     same extent as a court of competent law or equity, should the arbitrators
     determine that discovery was sought without substantial justification or
     that discovery was refused or objected to without substantial
     justification. The decision of a majority of the three arbitrators as to
     the validity and amount of any claim in such Officer's Certificate shall be
     binding and conclusive upon the parties to this Agreement, and
     notwithstanding anything in Section 9.02(e) hereof, the Escrow Agent shall
     be entitled to act in accordance with such decision and make or withhold
     payments out of the Parent Escrow Fund in accordance therewith. Such
     decision shall be written and shall be supported by written findings of
     fact and conclusions which shall set forth the award, judgment, decree or
     order awarded by the arbitrators.
 
          (iii) Judgment upon any award rendered by the arbitrators may be
     entered in any court having jurisdiction. Any such arbitration shall be
     held in New York, New York under the American Arbitration Association rules
     then in effect. The non-prevailing party to an arbitration shall pay its
     own expenses, the fees of each arbitrator, the administrative costs of the
     arbitration, and the expenses, including without limitation, reasonable
     attorneys' fees and costs, incurred by the other party to the arbitration.
 
                                      A-41
<PAGE>   152
 
     (g) Representative of the Stockholders; Power of Attorney.
 
          (i) At the Effective Time, and without further act of any party,
     Robert P. Goodman shall be appointed as agent and attorney-in-fact (the
     "Representative") for each Target Stockholder (except such Target
     Stockholders, if any, as shall have perfected their appraisal rights under
     Delaware Law), for and on behalf of Target Stockholders, to give and
     receive notices and communications, to authorize delivery to Parent of
     shares of Parent Common Stock from the Parent Escrow Fund in satisfaction
     of claims by Parent, to object to such deliveries, to agree to, negotiate,
     enter into settlements and compromises of, and demand arbitration and
     comply with orders of courts and awards of arbitrators with respect to such
     claims, and to take all actions necessary or appropriate in the judgment of
     Representative for the accomplishment of the foregoing. Such agency may be
     changed by the Target Stockholders from time to time upon not less than
     thirty (30) days prior written notice to Parent; provided that the
     Representative may not be removed unless holders of at least a majority in
     interest of the Parent Escrow Fund agree to such removal and to the
     identity of the substituted agent. Any vacancy in the position of
     Representative may be filled by approval of the holders of a majority in
     interest of the Parent Escrow Fund. No bond shall be required of the
     Representative, and the Representative shall not receive compensation for
     his or her services. Notices or communications to or from the
     Representative relating to the Parent Escrow Fund shall constitute notice
     to or from each of the Target Stockholders.
 
          (ii) The Representative shall not be liable for any act done or
     omitted hereunder as Representative while acting in good faith. The Target
     Stockholders on whose behalf the Escrow Amount was contributed to the
     Parent Escrow Fund shall severally indemnify the Representative and hold
     the Representative harmless against any loss, liability or expense incurred
     without negligence or bad faith on the part of the Representative and
     arising out of or in connection with the acceptance or administration of
     the Representative's duties hereunder, including the reasonable fees and
     expenses of any legal counsel retained by the Representative.
 
     (h) Actions of the Representative. A decision, act, consent or instruction
of the Representative relating to the Parent Escrow Fund shall constitute a
decision of all Target Stockholders (except such Target Stockholders if any, as
shall have perfected appraisal rights under Delaware Law), and shall be final,
binding and conclusive upon each of such Target Stockholders, and the Escrow
Agent and Parent may rely upon any such decision, act, consent or instruction of
the Representative as being the decision, act, consent or instruction of each
such Target Stockholder. In the absence of bad faith, the Escrow Agent and
Parent are hereby relieved from any liability to any person for any acts done by
them in accordance with such decision, act, consent or instruction of the
Representative.
 
     (i) Third-Party Claims. In the event Parent becomes aware of a third-party
claim which Parent believes may result in a demand against the Parent Escrow
Fund, Parent shall notify the Representative of such claim, and the
Representative, as representative for the Target Stockholders, shall be
entitled, at their expense, to participate in any defense of such claim. Parent
shall have the right in its sole discretion to settle any such claim; provided,
however, that except with the consent of the Representative, no settlement of
any such claim with third-party claimants shall alone be determinative of the
amount of any claim against the Parent Escrow Fund. In the event that the
Representative has consented to any such settlement and acknowledged that the
claim is a valid claim against the Parent Escrow Fund, the Representative shall
have no power or authority to object under any provision of this Article IX to
the amount of any claim by Parent against the Parent Escrow Fund with respect to
such settlement.
 
     SECTION 9.03. Representative Escrow Arrangements. (a) Representative Escrow
Fund. At the Effective Time the Target Stockholders (except Target Stockholders,
in respect of Dissenting Shares) will be deemed to have received and deposited
with the Escrow Agent that number of shares of Parent Common Stock that is equal
to their proportionate share of the Representative Escrow Amount, plus a
proportionate share of any additional shares as may be issued to such Target
Stockholders in respect of such shares upon any stock split, stock dividend or
recapitalization effected by Parent after the Effective Time and prior to the
Expiration Date, without any act of any Target Stockholder. As soon as
practicable after the Effective Time, the Representative Escrow Amount , without
any act of any Target Stockholder, will be deposited with the
 
                                      A-42
<PAGE>   153
 
Escrow Agent. The Representative Escrow Amount, plus a proportionate share of
any additional shares as may be issued to such Target Stockholders in respect of
such shares upon any stock split, stock dividend or recapitalization effected by
Parent after the Effective Time and prior to the Expiration Date, shall
constitute an escrow fund (the "Representative Escrow Fund") and shall be
governed by the terms set forth herein and in an escrow agreement to be agreed
upon by the parties and to be entered into by and between the Representative and
the Escrow Agent (the "Representative Escrow Agreement"). The portion of the
Representative Escrow Amount contributed on behalf of each Target Stockholder
shall be in proportion to the aggregate number of shares of Parent Common Stock
which such holder would otherwise be entitled under Section 2.01, plus the
number of Target Options subject to adjustment under this Section 9.03 and
Section 2.04(a)(iv). Upon the exercise of any Target Option between the
Effective Time and the Expiration Date, three hundred and thirty-three
one-thousandths percent (.333%) of the shares of Parent Common Stock issued upon
such exercise shall be added and deposited to the Representative Escrow Fund
upon such exercise, and at the expiration of the Escrow Period, any Target
Options not so exercised as of the expiration of the Escrow Period shall be
adjusted in accordance with Section 2.04(a)(iv). The Representative Escrow Fund
shall be used to pay for the costs and expenses, including reasonable attorneys'
fees and expenses, and expenses of investigation and defense (hereinafter
individually a "Representative Expense" and collectively "Representative
Expenses"), incurred by Representative in performing his or her obligations
under this Article IX.
 
     (b) Representative Escrow Period; Distribution Upon Termination of
Representative Escrow Period. Subject to the following requirements, the
Representative Escrow Fund shall be in existence immediately following the
Effective Time and shall terminate at 5:00 p.m., Texas time, on the Expiration
Date (the "Representative Escrow Period"). On the Expiration Date any remaining
shares comprising the Representative Escrow Fund less any additional
Representative Expenses shall be released from the Representative Escrow Fund
and distributed to the Target Stockholders (the "Representative Escrow
Release"). Notwithstanding the above, no Representative Escrow Release shall
occur and the Representative Escrow Period shall not terminate with respect to
such amount (or some portion thereof) that is necessary in the reasonable
judgment of Representative to satisfy any unsatisfied claims concerning facts
and circumstances existing prior to the contemplated termination of the
Representative Escrow Period. As soon as all such claims have been resolved, the
Escrow Agent shall deliver to the Target Stockholders the amount which is
subject to a Representative Escrow Release and the remaining portion of the
Representative Escrow Fund not required to satisfy such claims. Deliveries of
Representative Escrow Amounts to the Target Stockholders pursuant to this
Section 9.03(b) shall be made in proportion to their respective original
contributions to the Representative Escrow Fund.
 
     (c) Protection of Representative Escrow Fund.
 
          (i) Any shares of Parent Common Stock or other equity securities
     issued or distributed by Parent (including shares issued upon a stock
     split) ("New Shares") in respect of Parent Common Stock in the
     Representative Escrow Fund which have not been released from the
     Representative Escrow Fund shall be added to the Representative Escrow Fund
     and become a part thereof. New Shares issued in respect of shares of Parent
     Common Stock which have been released from the Representative Escrow Fund
     shall not be added to the Representative Escrow Fund but shall be
     distributed to the record holders thereof. Cash dividends on Parent Common
     Stock shall not be added to the Representative Escrow Fund and not
     distributed to the record holders thereof.
 
          (ii) Each Target Stockholder shall have voting rights with respect to
     the shares of Parent Common Stock contributed to the Representative Escrow
     Fund by such party (and on any voting securities added to the
     Representative Escrow Fund in respect of such shares of Parent Common
     Stock).
 
     (d) Claims Upon Representative Escrow Fund.
 
          (i) Upon receipt by the Escrow Agent at any time on or before the last
     day of the Representative Escrow Period, as appropriate, of a certificate
     signed by the Representative stating that Representative has paid or
     properly accrued or reasonably anticipates that it will have to pay or
     accrue Representative Expenses, the Escrow Agent shall deliver to Parent
     out of the Representative Escrow Fund, as promptly
 
                                      A-43
<PAGE>   154
 
     as practicable, shares of Parent Common Stock held in the Representative
     Escrow Fund in an amount equal to such Representative Expenses.
 
          (ii) For the purposes of determining the number of shares of Parent
     Common Stock to be delivered to Representative out of the Representative
     Escrow Fund pursuant to Section 9.03(d)(i) hereof, the shares of Parent
     Common Stock shall be valued at the last reported sale price of a share of
     Parent Common Stock as reported by Nasdaq on the date such determination is
     made.
 
                                   ARTICLE X
 
                               GENERAL PROVISIONS
 
     SECTION 10.01. Expenses. Except as set forth in Sections 6.01 and 8.02,
each party to this Agreement will bear its respective costs and expenses
incurred in connection with the preparation, execution, and performance of this
Agreement and the Transactions, including all fees and expenses of agents,
representatives, counsel, and accountants. Parent will pay the HSR Act filing
fee. In the event of termination of this Agreement, the obligation of each party
to pay its own expenses will be subject to any rights of such party arising from
a Breach of this Agreement by another party.
 
     SECTION 10.02. Confidentiality. In addition to the obligations set forth in
the Non-Disclosure Agreement between the date of this Agreement and the Closing
Date, Parent and the Target will maintain in confidence, and will cause their
respective directors, officers, employees, agents, and advisors to maintain in
confidence, any written, oral, or other information obtained in confidence from
another party or the Target in connection with this Agreement or the
Transactions, unless (a) such information is already known to such party or to
others not bound by a duty of confidentiality or such information becomes
publicly available through no fault of such party, (b) the use of such
information is necessary or appropriate in making any filing or obtaining any
consent or approval required for the consummation of the Transactions, or (c)
the furnishing or use of such information is required by Proceedings. If the
Transactions are not consummated, each party will return or destroy as much of
such written information as the other party may reasonably request.
 
     SECTION 10.03. Notices. All notices, consents, waivers, and other
communications under this Agreement must be in writing and will be deemed to
have been duly given when (a) delivered by hand (with written confirmation of
receipt), (b) sent by facsimile (with written confirmation of receipt), provided
that a copy is mailed by registered mail, return receipt requested, or (c) when
received by the addressee, if sent by a nationally recognized overnight delivery
service (receipt requested), in each case to the appropriate addresses and
facsimile numbers set forth below (or to such other addresses and facsimile
numbers as a party may designate by notice to the other parties):
 
     Target:
 
        Celcore, Inc.
        3800 Forest Hill-Irene Road
        Memphis, Tennessee 38125
        Attention: Robert P. Goodman
        Facsimile No.: (901) 624-4118
 
     with a copy to:
 
          Powell, Goldstein, Frazer and Murphy, LLP
          Sixteenth Floor
          191 Peachtree Street, N.E.
          Atlanta, Georgia 30303-1740
          Attention: G. William Speer
          Facsimile No.: (404) 571-6999
 
                                      A-44
<PAGE>   155
 
     Parent and Parent Sub:
 
          DSC Communications Corporation
          1000 Coit Road
          Plano, Texas 75075
          Attention: General Counsel
          Facsimile No.: (972) 519-2321
 
     with a copy to:
 
          Baker & McKenzie
          4500 Trammell Crow Center
          2001 Ross Avenue
          Dallas, Texas 75201
          Attention: Daniel W. Rabun
          Facsimile No.: (214) 978-3099
 
     Representative:
 
        Robert P. Goodman
        1013 Cove Road
        Mamaroneck, New York 10543
        Facsimile No.: (914) 777-2639
 
     SECTION 10.04. Further Assurances. The parties agree (a) to furnish upon
request to each other such further information, (b) to execute and deliver to
each other such other documents, and (c) to do such other acts and things, all
as the other party may reasonably request for the purpose of carrying out the
intent of this Agreement and the documents referred to in this Agreement.
 
     SECTION 10.05. Entire Agreement and Modification. This Agreement supersedes
all prior agreements between the parties with respect to its subject matter and
constitutes (along with the documents referred to in this Agreement) a complete
and exclusive statement of the terms of the agreement between the parties with
respect to its subject matter, but the Confidentiality Agreement shall be deemed
to be a part of this Agreement and is hereby incorporated by reference.
 
     SECTION 10.06. Target Disclosure Schedule. (a) The disclosures in the
Target Disclosure Schedule relate only to the representations and warranties in
the Section of the Agreement to which they expressly relate and not to any other
representation or warranty in this Agreement.
 
     (b) In the event of any inconsistency between the statements in the body of
this Agreement and those in the Target Disclosure Schedule (other than an
exception expressly set forth as such in the Target Disclosure Schedule with
respect to a specifically identified representation or warranty), the statements
in the body of this Agreement will control.
 
     SECTION 10.07. Assignments, Successors, and No Third-Party Rights. Neither
party may assign any of its rights under this Agreement without the prior
consent of the other parties (whether by operation of Law or otherwise) except
that Parent may assign any of its rights under this Agreement to any subsidiary
of Parent. Subject to the preceding sentence, this Agreement will apply to, be
binding in all respects upon, and inure to the benefit of the successors and
permitted assigns of the parties. Nothing expressed or referred to in this
Agreement will be construed to give any Person other than the parties to this
Agreement any legal or equitable right, remedy, or claim under or with respect
to this Agreement or any provision of this Agreement. This Agreement and all of
its provisions and conditions are for the sole and exclusive benefit of the
parties to this Agreement and their successors and assigns.
 
     SECTION 10.08. Severability. If any provision of this Agreement is held
invalid or unenforceable by any court of competent jurisdiction, the other
provisions of this Agreement will remain in full force and effect. Any provision
of this Agreement held invalid or unenforceable only in part or degree will
remain in full force and effect to the extent not held invalid or unenforceable.
 
                                      A-45
<PAGE>   156
 
     SECTION 10.09. Section Headings, Construction. The headings of Sections in
this Agreement are provided for convenience only and will not affect its
construction or interpretation. All references to "Section" or "Sections" refer
to the corresponding Section or Sections of this Agreement. All words used in
this Agreement will be construed to be of such gender or number as the
circumstances require. Unless otherwise expressly provided, the word "including"
does not limit the preceding words or terms.
 
     SECTION 10.10. Time of Essence. With regard to all dates and time periods
set forth or referred to in this Agreement, time is of the essence.
 
     SECTION 10.11. Incorporation of Schedules. The Target Disclosure Schedule
and the Parent Disclosure Schedule referred to herein and signed for
identification by the parties hereto are hereby incorporated herein and made a
part hereof for all purposes as if fully set forth herein.
 
     SECTION 10.12. Specific Performance. The parties hereto agree that
irreparable damage would occur in the event any provision of this Agreement was
not performed in accordance with the terms hereof and that the parties shall be
entitled to specific performance of the terms hereof, in addition to any other
remedy at law or equity.
 
     SECTION 10.13. Waiver of Jury Trial. Each of Parent, the Target and Parent
Sub hereby irrevocably waives all right to trial by jury in any Proceeding
(whether based on contract, tort or otherwise) arising out of or relating to
this Agreement or the actions of Parent, the Target or Parent Sub in the
negotiation, administration, performance and enforcement thereof.
 
     SECTION 10.14. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of Delaware without regard
to the rules of conflicts of law thereof. All actions and proceedings arising
out of or relating to this Agreement shall be heard and determined in any court
sitting in the City of Wilmington, Delaware and each of the parties consents to
the jurisdiction of such courts in any such Proceeding and waives any objection
to venue laid therein.
 
     SECTION 10.15. Certain Definitions. For purposes of this Agreement:
 
          "Affiliate" of a specified person shall mean a person who, directly or
     indirectly, through one or more intermediaries, controls, is controlled by,
     or is under common control with, such specified person.
 
          "Best Efforts" shall mean the efforts that a prudent Person desirous
     of achieving a result would use in similar circumstances to ensure that
     such result is achieved as expeditiously as possible but without the
     necessity of making payments to third parties to procure consents,
     approvals or similar requirements.
 
          "Breach" shall mean a "Breach" of a representation, warranty,
     covenant, obligation, or other provision of this Agreement or any
     instrument delivered pursuant to this Agreement if there is or has been any
     inaccuracy in or breach of, or any failure to perform or comply with, such
     representation, warranty, covenant, obligation, or other provision.
 
          "business day" shall mean any day on which the principal offices of
     the SEC in Washington, D.C. are open to accept filings, or, in the case of
     determining a date when any payment is due, any day on which banks are not
     required or authorized to close in New York, New York.
 
          "Consent" shall mean any approval, consent, ratification, waiver, or
     other authorization of third parties (excluding any Governmental
     Authorization).
 
          "Contract" shall mean any agreement, contract, lease, obligation,
     commitment, arrangement, promise, or undertaking (whether written or oral
     and whether express or implied) that is legally binding.
 
          "control" (including the terms "controlled by" and "under common
     control with") means the possession, directly or indirectly or as trustee
     or executor, of the power to direct or cause the direction of the
     management and policies of a person, whether through the ownership of
     voting securities, as trustee or executor, by contract or credit
     arrangement or otherwise.
 
          "GAAP" shall mean generally accepted United States accounting
     principles.
 
                                      A-46
<PAGE>   157
 
          "Governmental Authorization" shall mean any franchises, grants,
     approval, license, permit, easements, variances, exceptions, certificates,
     approvals, orders, waiver, or other authorization issued, granted, given,
     or otherwise made available by or under the authority of any Governmental
     Authority or pursuant to any Law.
 
          "Knowledge:" an individual will be deemed to have "Knowledge" of a
     particular fact or other matter if:
 
             (a) such individual is actually aware of such fact or other matter;
        or
 
             (b) a prudent individual would be expected to discover or otherwise
        become aware of such fact or other matter in the course of conducting
        reasonable inquiries.
 
          A Person (other than an individual) will be deemed to have "Knowledge"
     of a particular fact or other matter if any individual who is serving, or
     who has at any time served, as a director, officer, key employee, partner,
     executor, or trustee of such Person (or in any similar capacity) has, or at
     any time had, Knowledge of such fact or other matter.
 
          "Law" shall mean any federal, state, local, municipal, foreign,
     international, multinational, or other administrative order, constitution,
     law, ordinance, principle of common law, rule, regulation, judgment,
     decree, statute, or treaty.
 
          "Order" shall mean any award, decision, decree, determination,
     injunction, judgment, order, consent decree, ruling, subpoena, writ or
     verdict entered, issued, made, or rendered by any court, administrative
     agency, or other Governmental Authority or by any arbitrator.
 
          "Ordinary Course of Business:" an action taken by a Person will be
     deemed to have been taken in the "Ordinary Course of Business" only if:
 
             (a) such action is consistent with the past practices of such
        Person and is taken in the ordinary course of the normal day-to-day
        operations of such Person;
 
             (b) such action is not required under law to be authorized by the
        board of directors of such Person; and
 
             (c) such action is similar in nature and magnitude to actions
        customarily taken, without any authorization by the board of directors
        (or by any Person or group of Persons exercising similar authority), in
        the ordinary course of the normal day-to-day operations of other Persons
        that are in the same line of business as such Person.
 
          "Person" shall mean any individual, corporation (including any
     non-profit corporation), general or limited partnership, limited liability
     company, joint venture, estate, trust, association, organization, labor
     union, or other entity or Governmental Authority.
 
          "Proceeding" shall mean any action, arbitration, audit, hearing,
     investigation, litigation, or suit (whether civil, criminal,
     administrative, investigative, or informal) commenced, brought, conducted,
     or heard by or before, or otherwise involving, any Governmental Authority
     or arbitrator.
 
          "Subsidiary" or "subsidiaries" of any Person means any corporation,
     limited liability company, partnership, joint venture or other legal entity
     of which such Person (either alone or through or together with any other
     subsidiary), owns or has rights to acquire, directly or indirectly, more
     than 50% of the stock or other equity interests the holders of which are
     generally entitled to vote for the election of the board of directors or
     other governing body of such corporation or other legal entity.
 
          "Threatened:" a claim, Proceeding, dispute, action, or other matter
     will be deemed to have been "Threatened" if any demand or statement has
     been made (orally or in writing) or any notice has been given (orally or in
     writing), or if any other event has occurred or any other circumstances
     exist, that would lead a prudent Person to conclude that such a claim,
     Proceeding, dispute, action, or other matter is likely to be asserted,
     commenced, taken, or otherwise pursued in the future.
 
                                      A-47
<PAGE>   158
 
     SECTION 10.16. Counterparts. This Agreement may be executed in one or more
counterparts, each of which will be deemed to be an original copy of this
Agreement and all of which, when taken together, will be deemed to constitute
one and the same agreement.
 
     IN WITNESS WHEREOF, the parties have executed and delivered this Agreement
as of the date first written above.
 
                                        DSC COMMUNICATIONS CORPORATION
 
                                        By:       /s/ JAMES L. DONALD
                                           -------------------------------------
                                                      James L. Donald
                                             Chairman of the Board, President
                                                and Chief Executive Officer
 
                                        CI ACQUISITION
 
                                                 /s/ JAMES L. DONALD
                                        ----------------------------------------
                                                    James L. Donald
                                            Chairman of the Board, President
                                              and Chief Executive Officer
 
                                        CELCORE, INC.:
 
                                        By:      /s/ ROBERT P. GOODMAN
                                           -------------------------------------
                                                     Robert P. Goodman
                                                 Chairman of the Board and
                                                  Chief Executive Officer
 
                                      A-48
<PAGE>   159
 
                                 DEFINED TERMS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Affiliate...................................................  A-46
Affiliate Agreement.........................................  A-34
Agents......................................................  A-32
Agreement...................................................   A-5
AICPA Statement.............................................  A-36
Average Trading Price.......................................   A-6
Best Efforts................................................  A-46
Blue Sky Laws...............................................  A-12
Breach......................................................  A-46
Business Combination Transaction............................  A-37
business day................................................  A-46
Certificate of Designation..................................  A-12
Certificate of Merger.......................................   A-5
Certificates................................................   A-7
Closing.....................................................   A-5
Closing Date................................................   A-5
Code........................................................   A-5
Consent.....................................................  A-46
Contract....................................................  A-46
control.....................................................  A-46
Copyrights..................................................  A-17
Delaware Law................................................   A-5
Dissenting Shares...........................................  A-10
Effective Time..............................................   A-5
Environmental Claims........................................  A-21
Environmental Laws..........................................  A-20
Environmental Permits.......................................  A-20
ERISA.......................................................  A-14
ERISA Affiliate.............................................  A-14
Escrow Agent................................................  A-39
Escrow Period...............................................  A-40
Escrow Release..............................................  A-40
Exchange Act................................................  A-12
Exchange Agent..............................................   A-7
Exchange Fund...............................................   A-7
Exchange Ratio..............................................   A-6
Expiration Date.............................................  A-39
Financial Statements........................................  A-13
GAAP........................................................  A-46
Governmental Authority......................................  A-12
Governmental Authorization..................................  A-47
Hazardous Substances........................................  A-20
HSR Act.....................................................  A-12
Indemnification Agreements..................................  A-24
Intellectual Property Assets................................  A-17
Knowledge...................................................  A-47
Law.........................................................  A-47
Liens.......................................................  A-21
Loss........................................................  A-39
Losses......................................................  A-39
</TABLE>
 
                                      A-49
<PAGE>   160
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Marks.......................................................  A-17
Material Adverse Effect.....................................  A-11
Merger......................................................   A-5
Multiemployer Plan..........................................  A-14
Nasdaq......................................................   A-6
New Shares..................................................  A-40
Non-Disclosure Agreement....................................  A-32
Notes.......................................................  A-13
Officer's Certificate.......................................  A-40
Order.......................................................  A-47
Ordinary Course of Business.................................  A-47
Other Benefit Obligations...................................  A-14
Parent......................................................   A-5
Parent Common Stock.........................................   A-6
Parent Disclosure Schedule..................................  A-25
Parent Documents............................................  A-27
Parent Escrow Agreement.....................................  A-39
Parent Escrow Amount........................................   A-9
Parent Escrow Fund..........................................  A-39
Parent Preferred Stock......................................  A-26
Parent Sub..................................................   A-5
Parent Sub Common Stock.....................................   A-7
Patents.....................................................  A-17
PBGC........................................................  A-14
Pension Plan................................................  A-14
Person......................................................  A-47
Plan........................................................  A-14
Plan Sponsor................................................  A-14
Pre-Merger Period...........................................  A-23
Proceeding..................................................  A-47
Proprietary Rights Agreement................................  A-17
Proxy Statement.............................................  A-29
Qualified Plan..............................................  A-14
Registration Statement......................................  A-29
Representative..............................................  A-42
Representative Agent Notice.................................  A-41
Representative Escrow Agreement.............................  A-43
Representative Escrow Amount................................   A-9
Representative Escrow Fund..................................  A-43
Representative Escrow Period................................  A-43
Representative Escrow Release...............................  A-43
Representative Expense......................................  A-43
Representative Expenses.....................................  A-43
Rights in Mask Works........................................  A-18
Sale........................................................  A-23
SEC.........................................................  A-10
Secretary...................................................   A-5
Section.....................................................  A-46
Securities Act..............................................  A-12
Series A Preferred Stock....................................   A-6
Series B Preferred Stock....................................   A-6
Series C Preferred Stock....................................   A-6
</TABLE>
 
                                      A-50
<PAGE>   161
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Series D Preferred Stock....................................   A-6
Specified Expenses..........................................  A-38
Subsidiary..................................................  A-47
Substitute Option...........................................   A-9
Superior Proposal...........................................  A-32
Surviving Corporation.......................................   A-5
Takeover Proposal...........................................  A-32
Target......................................................   A-5
Target Affiliate............................................  A-34
Target Banker...............................................  A-21
Target Common Stock.........................................   A-6
Target Disclosure Schedule..................................  A-11
Target Options..............................................   A-9
Target Other Benefit Obligation.............................  A-14
Target Permits..............................................  A-12
Target Plan.................................................  A-14
Target Preferred Stock......................................   A-6
Target Products.............................................  A-21
Target Stock................................................   A-7
Target Stock Option Plan....................................   A-9
Target Stockholder Plan.....................................  A-23
Target Stockholders.........................................   A-5
Target Subsidiaries.........................................  A-11
Target VEBA.................................................  A-14
Target's Stockholder Meeting................................  A-31
Terminating Parent Breach...................................  A-37
Terminating Target Breach...................................  A-37
Threatened..................................................  A-47
Title IV Plans..............................................  A-14
Trade Secrets...............................................  A-18
Transaction Fee.............................................  A-37
Transactions................................................   A-5
Unaudited Monthly Statements................................  A-33
VEBA........................................................  A-14
Voting Agreements...........................................  A-34
Welfare Plan................................................  A-14
</TABLE>
 
                                      A-51
<PAGE>   162
 
                                                                       EXHIBIT A
 
                          CERTIFICATE OF INCORPORATION
                                       OF
                             CI ACQUISITION COMPANY
 
                                   ARTICLE I
 
     The name of the corporation is CI Acquisition Company (the "Corporation").
 
                                   ARTICLE II
 
     The address of the Corporation's registered office in the State of Delaware
is Corporation Trust Center, 1209 Orange Street, Wilmington, New Castle County,
Delaware 19801. The name of its registered agent at such address is The
Corporation Trust Company.
 
                                  ARTICLE III
 
     The purpose of the Corporation is to engage in any lawful act or activity
for which corporations may be organized under the General Corporation Law of the
State of Delaware.
 
                                   ARTICLE IV
 
     The total number of shares of stock which the Corporation shall have the
authority to issue is one thousand (1,000) shares of Common Stock, par value one
cent ($.01) per share.
 
                                   ARTICLE V
 
     The powers of the incorporator are to terminate upon the filing of this
certificate of incorporation, and the name and mailing address of the persons
who are to serve as the board of directors until the first annual meeting of the
stockholders or until their successors are elected and qualified are as follows:
 
<TABLE>
<CAPTION>
             NAMES OF DIRECTORS                      MAILING ADDRESS
             ------------------                      ---------------
<S>                                           <C>
James L. Donald.............................  DSC Communications Corporation
                                                              1000 Coit Road
                                                          Plano, Texas 75075
Gerald F. Montry............................  DSC Communications Corporation
                                                              1000 Coit Road
                                                          Plano, Texas 75075
George Brunt................................  DSC Communications Corporation
                                                              1000 Coit Road
                                                          Plano, Texas 75075
</TABLE>
 
                                   ARTICLE VI
 
     Elections of directors need not be by written ballot unless the bylaws of
the Corporation shall so provide.
 
                                  ARTICLE VII
 
     The Board of Directors of the Corporation is expressly authorized to adopt,
amend or repeal bylaws of the Corporation, but the stockholders may make
additional bylaws and may alter or repeal any bylaw whether adopted by them or
otherwise.
 
                                      A-A-1
<PAGE>   163
 
                                  ARTICLE VIII
 
     Whenever a compromise or arrangement is proposed between the Corporation
and its creditors or any class of them and/or between the Corporation and its
stockholders or any class of them, any court of equitable jurisdiction within
the State of Delaware may, on the application in a summary way of the
Corporation or of any creditor or stockholder thereof or on the application of
any receiver or receivers appointed for the Corporation under the provisions of
Section 291 of the General Corporation Law of the State of Delaware or on the
application of trustees in dissolution or of any receiver or receivers appointed
for the Corporation under the provisions of Section 279 of the General
Corporation Law of the State of Delaware, order a meeting of the creditors or
class of creditors, and/or of the stockholders or class of stockholders of the
Corporation, as the case may be, to be summoned in such manner as the said court
directs. If a majority in number representing three-fourths in value of the
creditors or class of creditors, and/or of the stockholders or class of
stockholders of the Corporation, as the case may be, agree to any compromise or
arrangement and to any reorganization of the Corporation as consequence of such
compromise or arrangement, the said compromise or arrangement and the said
reorganization shall, if sanctioned by the court to which the said application
has been made, be binding on all of the creditors or class of creditors, and/or
on all of the stockholders or class of stockholders, of the Corporation, as the
case may be, and also on the Corporation.
 
                                   ARTICLE IX
 
     A director of the Corporation or any director of a predecessor corporation
shall not be personally liable to the Corporation or its stockholders for
monetary damages for breach of fiduciary duty as a director, except for
liability (i) for any breach of the director's duty of loyalty to the
Corporation or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) under
Section 174 of the General Corporation Law of the State of Delaware, as the same
exists or hereafter may be amended, or (iv) for any transaction from which the
director derived an improper personal benefit. If the General Corporation Law of
the State of Delaware is amended after the date of filing of this certificate of
incorporation to authorize corporate action further eliminating or limiting the
personal liability of directors, then the liability of a director of the
Corporation, in addition to the limitation on personal liability provided
herein, shall be limited to the fullest extent permitted by the amended General
Corporation Law of the State of Delaware. Each director and officer of this
corporation and any predecessor corporation shall be indemnified to the full
extend permitted under Section 145 of the General Corporation Law of the State
of Delaware. Any repeal or modification of this Article IX by the stockholders
of the Corporation shall be prospective only, and shall not adversely affect any
limitation on the personal liability of a director of the Corporation existing
at the time of such repeal or modification.
 
                                   ARTICLE X
 
     The name and mailing address of the incorporator is as follows:
 
<TABLE>
<CAPTION>
                      NAME                              MAILING ADDRESS
                      ----                              ---------------
<S>                                                <C>
Daniel W. Rabun..................................           Baker & McKenzie
                                                   4500 Trammell Crow Center
                                                            2001 Ross Avenue
                                                         Dallas, Texas 75201
</TABLE>
 
     The undersigned incorporator under penalties of perjury hereby acknowledges
that the foregoing certificate of incorporation is his act and deed and that the
facts stated therein are true.
 
                                            ------------------------------------
                                            Daniel W. Rabun
 
                                      A-A-2
<PAGE>   164
 
                                                                       EXHIBIT B
 
                              AFFILIATE AGREEMENT
 
                                October   , 1997
 
DSC Communications Corporation
1000 Coit Road
Plano, Texas 75075
 
Ladies and Gentlemen:
 
     I understand that an Agreement and Plan of Merger dated as of October 29,
1997 (the "Merger Agreement") has been entered into by and among DSC
Communications Corporation, a Delaware corporation ("Parent"), CI Acquisition
Company, a Delaware corporation ("Parent Sub") and Celcore, Inc., a Delaware
corporation ("Target"), and that pursuant to the Merger Agreement, Parent Sub
will merge with and into Target, Target will become a wholly-owned subsidiary of
Parent, and the stockholders of Target will become stockholders of Parent (the
"Merger"). Capitalized terms used herein and not defined have the meaning for
them set forth in the Merger Agreement.
 
     I also understand that in accordance with the Merger Agreement, the shares
of Target Stock owned by the undersigned at the Effective Time shall be
converted into shares of Parent Common Stock in the manner and in the amounts
described in the Merger Agreement.
 
     In consideration of the mutual agreements, provisions and covenants set
forth in the Merger Agreement and hereinafter in this Affiliate Agreement, the
undersigned represents and agrees as follows:
 
     1. Rule 145. The undersigned will not offer, sell, pledge, transfer or
otherwise dispose of any of the shares of Parent Common Stock issued to the
undersigned in the Merger unless at such time either: (i) such transaction shall
be permitted pursuant to the provisions of Rule 145 promulgated under the
Securities Act; (ii) the undersigned shall have furnished to Parent an opinion
of counsel, satisfactory to Parent, to the effect that no registration under the
Securities Act would be required in connection with the proposed offer, sale,
pledge, transfer or other disposition; or (iii) a registration statement under
the Securities Act covering the proposed offer, sale, pledge, transfer or other
disposition shall be effective under the Securities Act.
 
     2. Legends.
 
     (a) The undersigned understands that all certificates representing Parent
Common Stock deliverable to the undersigned pursuant to the Merger shall bear a
legend substantially as follows:
 
     "THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE OFFERED, SOLD,
     PLEDGED, TRANSFERRED OR OTHERWISE DISPOSED OF EXCEPT IN ACCORDANCE WITH THE
     REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED, AND THE OTHER
     CONDITIONS SPECIFIED IN THE AFFILIATE AGREEMENT DATED AS OF OCTOBER 29,
     1997 BETWEEN THE HOLDER OF THIS CERTIFICATE AND DSC COMMUNICATIONS
     CORPORATION ("PARENT"), A COPY OF WHICH MAY BE INSPECTED BY THE HOLDER OF
     THE CERTIFICATE AT THE OFFICES OF PARENT, 1000 COIT ROAD, PLANO, TEXAS
     75075 OR FURNISHED BY PARENT TO THE HOLDER OF THIS CERTIFICATE UPON WRITTEN
     REQUEST AND WITHOUT CHARGE."
 
     (b) The undersigned also understands that unless the transfer by the
undersigned of shares of Parent Common Stock has been registered under the
Securities Act or is a sale made in conformity with the provisions of Rule 145,
Parent reserves the right to put the following legend on the certificate issue
to my transferee:
 
     "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
     THE SECURITIES ACT OF 1933, AS AMENDED, AND WERE ACQUIRED FROM A PERSON WHO
     RECEIVED SUCH SHARES IN A TRANSACTION TO WHICH RULE 145
 
                                      A-B-1
<PAGE>   165
 
     PROMULGATED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, APPLIES. THE
     SHARES HAVE BEEN ACQUIRED BY THE HOLDER NOT WITH A VIEW TO, OR FOR RESALE
     IN CONNECTION WITH, ANY DISTRIBUTION THEREOF WITHIN THE MEANING OF THE
     SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR
     OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH AN EXEMPTION FROM THE
     REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED."
 
     It is understood and agreed that the legends set forth in paragraphs (a)
and (b) above shall be removed by delivery of substitute certificates without
such legends if I, the undersigned, shall have delivered to Parent a copy of a
letter from the staff of the Securities and Exchange Commission, or an opinion
of counsel in form and substance reasonably satisfactory to Parent, to the
effect that such legends are not required for purposes of the Securities Act.
 
     Parent, in its discretion, may cause stop transfer orders to be placed with
its transfer agent with respect to the certificates for the shares of Parent
Common Stock which are required to bear the foregoing legends.
 
     3. Miscellaneous.
 
     (a) This Affiliate Agreement shall be governed by and construed in
accordance with the internal laws of the State of Delaware applicable to
agreements to be performed wholly within such state (without regard to its
conflicts of law rules).
 
     (b) This Affiliate Agreement shall be binding on my successors and assigns,
including my heirs, executors, administrators, trustees, and personal
representatives.
 
     (c) I acknowledge, understand and agree that the representations,
warranties and covenants set forth above will be relied upon by Parent and
Target and their respective affiliates, legal counsel and accountants, and that
substantial losses and damages may be incurred by such persons if any of such
representations, warranties or covenants are inaccurate or breached.
 
     (d) If a court of competent jurisdiction determines that any provision of
this Affiliate Agreement is not enforceable or enforceable only if limited in
time, scope or otherwise, this Affiliate Agreement shall continue in full force
and effect with such provision stricken or so limited.
 
     (e) This Affiliate Agreement may be executed in one or more counterparts,
each of which shall be deemed to be an original, but all of which together shall
constitute one and the same document.
 
     (f) This Affiliate Agreement shall not be modified or amended, or any right
hereunder waived or any obligation excused, except by a written instrument
signed by both parties.
 
     (g) I have carefully read this agreement and discussed its requirements, to
the extent I have believed necessary, with my counsel or counsel for Target.
                                            Very truly yours,
 
                                            ------------------------------------
                                            Signature
 
                                            ------------------------------------
                                            Print Name
 
Accepted:
 
DSC COMMUNICATIONS CORPORATION
 
By:
- ------------------------------------
 
Name:
- ------------------------------------
 
Title:
- ------------------------------------
 
Dated:
- ------------------------------------,
1997
 
                                      A-B-2
<PAGE>   166
 
                                                                       EXHIBIT C
 
                                VOTING AGREEMENT
 
     This Voting Agreement ("Agreement") is made and entered into as of October
  , 1997 by and between DSC Communications Corporation, a Delaware corporation
("Parent"), and the undersigned director, executive officer, or affiliate of
Celcore, Inc., a Delaware corporation ("Target").
 
                                    RECITALS
 
     A. Concurrently with the execution of this Agreement, Parent, CI
Acquisition Company, a Delaware corporation and a wholly-owned subsidiary of
Parent ("Parent Sub"), and Target have entered into an Agreement and Plan of
Merger dated as of October 29, 1997 (the "Merger Agreement"), providing for the
merger of Parent Sub with and into Target (the "Merger"), pursuant to which
Target will become a wholly-owned subsidiary of Parent.
 
     B. Capitalized terms used herein and not defined have the meaning for them
set forth in the Merger Agreement.
 
     C. The stockholder named on the signature page hereof (the "Stockholder")
is the beneficial holder of record of the number and class of shares of the
outstanding Target Stock, as is indicated on the final page of this Agreement
(the "Shares"). In connection with the Merger, Parent will acquire the
Stockholder's entire equity interest in Target and the Stockholder will receive
in exchange an equity interest in Parent. In consideration of and in order to
induce the execution of the Merger Agreement by Parent, the Stockholder agrees
not to sell or otherwise dispose of any shares of Target Stock held by the
Stockholder and to vote the Shares so as to facilitate consummation of the
Merger as more fully described below.
 
     NOW, THEREFORE, in consideration of the mutual promises and the mutual
covenants and agreements contained herein, the parties agree as follows:
 
     1. Agreement to Retain Shares. The Stockholder agrees not to transfer,
pledge, sell, exchange or offer to transfer or sell or otherwise dispose of or
encumber any of the Shares or to make any offer or agreement relative thereto at
any time prior to the Expiration Date. The "Expiration Date" shall mean the
earlier of (a) the date and time on which the Merger shall become effective in
accordance with the terms and provisions of the Merger Agreement, or (b) the
date on which the Merger Agreement shall be terminated pursuant to the Merger
Agreement.
 
     2. Agreement to Vote Shares; Waiver of Liquidation Rights and Appraisal
Rights. At any meeting of the Target Stockholders called with respect to any of
the following, and at any adjournment thereof, and on every action approved by
written consent of the Target Stockholders with respect to any of the following,
the Stockholder shall vote the Shares in favor of approval of (i) the Merger
Agreement and the Merger and any matter that could reasonably be expected to
facilitate the Merger, (ii) the employment agreements for Messrs. Berger, Foley,
and Gonzalez which are being entered into with such individuals in connection
with the Merger and (iii) the waiver of any rights to receive cash or other
property upon a liquidation of Target as provided in the certificate of
incorporation of Target or in any of the Certificates of Designations in respect
of any Target Preferred Stock. The Stockholder, as the holder of voting stock of
Target shall be present in person or by proxy, at all meetings of Target
Stockholders so that all Shares are counted for the purposes of determining the
presence of a quorum at such meetings. This Agreement is intended to bind the
Stockholder only with respect to the specific matters set forth herein, and
shall not prohibit the Stockholder from action in accordance with his fiduciary
duties as an officer or director of Target. In respect of the Merger, the
Stockholder hereby waives any rights to receive cash or other property upon a
liquidation of the Target as provided in the certificate of incorporation of
Target or any of the Certificates of Designations in respect of any Target
Preferred Stock owned by such Stockholder. In addition, the Stockholder agrees
not to take any action or actions to perfect any appraisal rights the
Stockholder may have as a result of the Merger under Section 262 of the Delaware
Law.
 
                                      A-C-1
<PAGE>   167
 
     3. Irrevocable Proxy. Concurrently with the execution of this Agreement,
the Stockholder agrees to deliver to Parent a proxy in the form attached hereto
as Annex A (the "Proxy"), which shall be irrevocable to the extent provided
therein; provided that the Proxy shall be revoked upon termination of this
Agreement in accordance with its terms.
 
     4. Additional Purchases. For purposes of this Agreement (including without
limitation, the recitals hereto), the term "Shares" shall include any shares of
Target capital stock (including Target Stock) that the Stockholder purchases or
as to which the Stockholder otherwise acquires voting power after the execution
of this Agreement and prior to the Expiration Date.
 
     5. Representations, Warranties and Covenants of the Stockholder. The
Stockholder hereby represents, warrants and covenants to Parent the following:
 
          (a) Ownership of Shares. Except as specifically described on Annex B
     to this Agreement (if any), the Stockholder (i) is the holder and
     beneficial owner of the Shares, which at the date hereof and at all times
     until the Expiration Date will be free and clear of any liens, claims,
     options, charges or other encumbrances, (ii) does not beneficially own any
     shares of Target Stock other than the Shares and (iii) has full power and
     authority to make, enter into, deliver and carry out the terms of this
     Agreement and the Proxy.
 
          (b) No Voting Trusts and Agreements. The Stockholder will not, and
     will not permit any entity under the Stockholder's control to, deposit any
     shares of Target capital stock (including Target Stock) held by the
     Stockholder or such entity in a voting trust or subject any shares of
     Target capital stock (including Target Stock) held by the Stockholder or
     such entity to any arrangement or agreement with respect to the voting of
     such shares of capital stock, other than agreements entered into with
     Parent or its affiliates.
 
          No Proxy Solicitations. The Stockholder will not, and will not permit
     any entity under the Stockholder's control to, (i) solicit proxies or
     become a participant in a "solicitation" (as such term is defined in Rule
     14a-11 under the Securities Exchange Act of 1934, as amended (the "Exchange
     Act")), with respect to any proposal made in opposition to or competition
     with consummation of the Merger and the Merger Agreement, any merger,
     consolidation, share exchange, sale of securities or assets,
     reorganization, recapitalization or other business combination involving
     Target and any other party (other than Parent and its affiliates), any
     liquidation (including the liquidation rights provided for in the
     Certificates of Designations), or winding up of Target and any other matter
     that would, or could reasonably be expected to, prohibit or discourage the
     Merger (each of the foregoing is referred to as an "Opposing Proposal"), or
     otherwise encourage or assist any party in taking or planning any action
     that would compete with, restrain or otherwise serve to interfere with or
     inhibit the timely consummation of the Merger in accordance with the terms
     of the Merger Agreement, (ii) initiate a Stockholders' vote or action by
     consent of Target Stockholders or (iii) become a member of a "group" (as
     such term is used in Section 13(d) of the Exchange Act) with respect to any
     voting securities of Target with respect to an Opposing Proposal.
 
     6. Representations, Warranties and Covenants of Parent. Parent represents,
warrants and covenants to the Stockholder as follows:
 
          (a) Due Authorization. This Agreement has been authorized by all
     necessary corporate action on the part of Parent and has been duly executed
     by a duly authorized officer of Parent.
 
          (b) Validity; No Conflict. This Agreement constitutes the legal, valid
     and binding obligation of Parent. Neither the execution of this Agreement
     by Parent nor the consummation of the transactions contemplated hereby will
     result in a breach or violation of the terms of any agreement by which
     Parent is bound or of any decree, judgment, order, law or regulation now in
     effect of any court or other governmental body applicable to Parent.
 
                                      A-C-2
<PAGE>   168
 
     7. Registration of Merger Shares.
 
          (a) Parent shall use all commercially reasonable efforts on or before
     the Effective Time to effect the registration under the Securities Act, on
     an appropriate form, of the shares of Parent Common Stock that will be
     issued to the Stockholder pursuant to the Merger (the "Merger Shares")
     unless Parent shall have provided to the Stockholder a no-action letter or
     opinion of counsel reasonably acceptable to the Stockholder, concluding
     that the Stockholder will not be restricted in any way in their ability
     absent such registration to resell the Merger Shares. Parent shall be
     required to file only one such registration statement and shall use its
     Best Efforts to keep such registration statement continuously effective
     until such time as the Merger Shares have been disposed of by the Target
     Stockholders but in no event for a period of longer than twenty-four (24)
     months after the date of the Effective Time. For purposes of this Section
     7, "Registration Statement" means the registration statement covering the
     Merger Shares filed pursuant hereto, including, to the extent applicable,
     the prospectus (the "Prospectus") included in any such registration
     statement, all amendments and supplements to any such registration
     statement (including post-effective amendments), all exhibits to any such
     registration statement and all material incorporated by reference in any
     such registration statement.
 
          (b) In connection with Parent's registration obligations pursuant to
     Section 7(a) and, except as provided in Section 7(b)(i), Parent shall use
     its Best Efforts to keep the Registration Statement continuously effective
     at Parent's sole expense for the period of time provided in Section 7(a),
     to permit the sale of the Merger Shares pursuant to the Registration
     Statement in accordance with the intended method or methods of distribution
     thereof specified by the Stockholder, and shall:
 
             (i) notify the Stockholder, promptly (A) when a new Registration
        Statement, Prospectus or supplement thereto or post-effective amendment
        has been filed, and, with respect to a new Registration Statement or
        post-effective amendment when it has become effective, (B) of any
        request by the SEC for amendments or supplements to any Registration
        Statement or Prospectus or for additional information, (C) of the
        issuance by the SEC of any comments with respect to any filing and of
        any stop order suspending the effectiveness of any Registration
        Statement or the initiation of any proceedings for that purpose, (D) of
        the receipt by Parent of any notification with respect to the suspension
        of the qualification of the Merger Shares for sale in any jurisdiction
        or the initiation or threatening of any proceeding for such purpose, (E)
        of the happening of any event that makes any statement made in any
        Registration Statement, Prospectus or any document incorporated therein
        by reference untrue or that requires the making of any changes in any
        Registration Statement, Prospectus or any document incorporated therein
        by reference in order to make the statements therein not misleading, and
        (F) of Parent's determination that a post-effective amendment to a
        Registration Statement would be appropriate;
 
             (ii) furnish to the Stockholder, without charge, as many conformed
        copies of the Registration Statement and any amendments thereto as may
        reasonably be requested by the Target Stockholders;
 
             (iii) deliver to the Stockholder, without charge, as many copies of
        the Prospectus covering the Merger Shares and any amendments or
        supplements thereto as the Stockholder may reasonably request;
 
             (iv) register, qualify, or obtain an exemption therefrom, in
        connection with the registration or qualification or exemption therefrom
        of the Merger Shares for offer and sale under the securities or Blue Sky
        Laws of New York and, as the Stockholder reasonably requests, any other
        jurisdictions within the United States and do any and all other acts or
        things necessary or advisable to enable the disposition in such
        jurisdictions of the Merger Shares covered by the Registration
        Statement; provided, however, that Parent shall not be required to
        qualify as a dealer in securities or as a foreign corporation, or
        otherwise subject itself to taxation in connection with such activities,
        or to execute a general consent to service of process in any
        jurisdiction;
 
             (v) otherwise use its Best Efforts to comply with all applicable
        rules and regulations of the SEC relating to such registration and the
        distribution of the securities being offered, and make
 
                                      A-C-3
<PAGE>   169
 
        generally available to its securities holders earning statements
        satisfying the provisions of Section 11(a) of the Securities Act no
        later than 90 days after the end of any twelve (12) month period (or 120
        days if such period is a fiscal year) beginning with the first month of
        the first fiscal quarter commencing after the effective date of such
        Registration Statement, which earning statements shall cover such twelve
        (12) month periods;
 
             (vi) in no event later than ten (10) business days before filing
        any Registration Statement or Prospectus, or any amendment or supplement
        (other than any amendment or supplement made solely as a result of
        incorporation by reference of documents) thereof (or, in the case of any
        Prospectus supplement or post-effective amendment relating to a proposed
        shelf "draw-down," three (3) business days before the filing thereof),
        furnish to the Stockholder copies of all such documents proposed to be
        filed, which documents shall be subject to the reasonable review of the
        Stockholder;
 
             (vii) promptly after the filing of any document that is to be
        incorporated by reference into a Registration Statement or Prospectus,
        provide copies of such document to the Stockholder; and
 
             (viii) use all commercially reasonable efforts to take all actions
        necessary or advisable to effect such registration in the manner
        contemplated by this Agreement.
 
          (c) The Stockholder shall furnish to Parent such information regarding
     the Stockholder and the plan of distribution of the Merger Shares as Parent
     may from time to time reasonably request.
 
          (d) The Stockholder agrees that upon receipt of any notice from Parent
     of the happening of any event of the kind described in Sections 7(b)(i)(B),
     7(b)(i)(C), 7(b)(i)(D), 7(b)(i)(E) or 7(b)(i)(F), it shall forthwith
     discontinue disposition of the Merger Shares pursuant to the Prospectus
     until (a) it is advised in writing by Parent that a new Registration
     Statement covering the offer of the Merger Shares has become effective
     under the Securities Act, (b) it receives copies of a supplemented or
     amended Prospectus, or (c) until it is advised in writing by Parent that
     the use of the Prospectus may be resumed. Parent shall promptly take all
     such action as may be necessary or appropriate, including without
     limitation, the filing of a new Registration Statement or an amendment to
     the then current Registration Statement and/or the filing of an amended
     Prospectus, to limit the duration of any discontinuance with respect to the
     disposition of the Merger Shares pursuant to this Section 7(d).
 
          (e) The Stockholder shall cooperate with Parent in all reasonable
     respects in connection with the preparation and filing of the Registration
     Statement,
 
          (f) All expenses incident to Parent's performance of or compliance
     with this Agreement, including without limitation all registration and
     filing fees, fees and expenses for compliance with securities or Blue Sky
     Laws (including fees and disbursements of Parent's counsel in connection
     with blue sky qualifications or registrations (or the obtaining of
     exemptions therefrom) of the Merger Shares), printing expenses (including
     expenses of printing Prospectuses), messenger and delivery expenses,
     internal expenses (including without limitation, all salaries and expenses
     of its officers and employees performing legal or accounting duties), fees
     and disbursements of its counsel and its independent certified public
     accountants, fees and expenses of any special experts retained by Parent in
     connection with any registration hereunder, and fees and expenses of other
     persons retained by Parent, but excluding fees and disbursements of counsel
     retained by the Stockholder, any fees and expenses of any underwriters
     relating to the Merger Shares and transfer taxes, if any, relating to the
     Merger Shares, shall be borne by Parent.
 
          (g) Parent shall indemnify and hold harmless the Stockholder against
     all losses, claims, damages, liabilities and expenses (including reasonable
     costs of investigation and legal expenses) resulting from any untrue or
     alleged untrue statement of a material fact contained in any Registration
     Statement or any Prospectus, or any amendment or supplement thereto, or any
     omission or alleged omission to state in any thereof a material fact
     required to be stated therein or necessary to make the statements therein
     not misleading, except in each case insofar as the same arises out of or is
     based upon an untrue statement or alleged untrue statement of a material
     fact or an omission or alleged omission to state a material fact in such
     Registration Statement, Prospectus, amendment or supplement, as the case
     may be, made or
 
                                      A-C-4
<PAGE>   170
 
     omitted, as the case may be, in reliance upon and in conformity with
     information furnished to Parent or its affiliates by the Stockholder
     expressly for use therein.
 
          (h) The Stockholder with respect only to information furnished by it
     to Parent or its affiliates expressly for use in any Registration
     Statement, any Prospectus, or any amendment or supplement thereto shall
     indemnify and hold harmless their officers, directors, employees,
     representatives, agents and affiliates and each Person who controls (within
     the meaning of the Securities Act) Parent, against all losses, claims,
     damages, liabilities and expenses (including reasonable costs of
     investigation and legal expenses) resulting from any untrue or alleged
     untrue statement of a material fact contained in such Registration
     Statement, any Prospectus, or any amendment or supplement thereto, or any
     omission or alleged omission to state in any thereof a material fact
     required to be stated therein or necessary to make the statements therein
     not misleading, as the same arises out of or is based upon an untrue
     statement or alleged untrue statement of a material fact or an omission or
     alleged omission to state a material fact in such Registration Statement,
     Prospectus, amendment or supplement, as the case may be, made or omitted,
     as the case may be, in reliance upon and in conformity with such written
     information.
 
          (i) Each party entitled to indemnification under this Section 7 (the
     "Indemnified Party") shall give notice to the party required to provide
     indemnification (the "Indemnifying Party") promptly after such Indemnified
     Party has actual knowledge of any claim as to which indemnity may be
     sought, and shall permit the Indemnifying Party to assume the defense of
     any such claim or any litigation resulting therefrom; provided, that
     counsel for the Indemnifying Party, who will conduct the defense of such
     claim or litigation, is approved by the Indemnified Party (whose approval
     will not be unreasonably withheld or delayed); and provided, further, that
     the failure of any Indemnified Party to give notice as provided herein
     shall not relieve the Indemnifying Party of its obligations except to the
     extent that its defense of the claim or litigation involved is prejudiced
     by such failure. The Indemnified Party may participate in such defense at
     such party's expense; provided, however, that the Indemnifying Party shall
     pay such expense if representation of such Indemnified Party by the counsel
     retained by the Indemnifying Party would be inappropriate due to actual or
     potential conflicts of interest between the Indemnified Party and any other
     party represented by such counsel in such proceeding. No Indemnifying
     Party, in the defense of any such claim or litigation, shall, except with
     the consent of each Indemnified Party, consent to entry of any judgment or
     enter into any settlement that does not include as an unconditional term
     thereof the giving by the claimant or plaintiff to such Indemnified Party
     of a release from all liability in respect of any claim or litigation, and
     no Indemnified Party will consent to entry of any judgment or settle any
     claim or litigation without the prior written consent of the Indemnifying
     Party. Each Indemnified Party shall furnish such information regarding
     himself or itself and the claim in question as the Indemnifying Party may
     reasonably request and as shall be reasonably required in connection with
     the defense of such claim and litigation resulting therefrom.
 
          (j) If for any reason the indemnification provided for in this Section
     7 from an Indemnifying Party is unavailable to an Indemnified Party
     hereunder or insufficient to hold it harmless as contemplated by this
     Section 7, then the Indemnifying Party, in lieu of indemnifying such
     Indemnified Party, shall contribute to the amount paid or payable by such
     Indemnified Party as a result of such losses, claims, damages, liabilities
     or expenses in such proportion as is appropriate to reflect the relative
     fault of an Indemnifying Party and Indemnified Party in connection with the
     actions that resulted in such losses, claims, damages, liabilities or
     expenses, as well as any other relevant equitable considerations. The
     relative fault of the Indemnifying Party and Indemnified Party shall be
     determined by reference to, among other things, whether any action in
     question, including any untrue or alleged untrue statement of a material
     fact, has been made by, or relates to information supplied by, an
     Indemnifying Party or Indemnified Party, and the parties' relative intent,
     knowledge, access to information and opportunity to correct or prevent such
     action. The amount paid or payable by a party as a result of the losses,
     claims, damages, liabilities and expenses referred to above shall be deemed
     to include, subject to the limitations set forth in Section 7(i), any legal
     or other fees or expenses reasonably incurred by such party in connection
     with any investigation or proceeding. The parties hereto agree that it
     would not be just and equitable if contribution pursuant to this Section
     7(k) were determined by pro rata allocation or by any
 
                                      A-C-5
<PAGE>   171
 
     other method of allocation that does not take account of the equitable
     considerations referred to in the immediately preceding paragraph. No
     person guilty of fraudulent misrepresentation (within the meaning of
     Section 11(f) of the Securities Act) shall be entitled to contribution from
     any person who was not guilty of such fraudulent misrepresentation.
 
     8. Securities Act Covenants and Representations. Subject to Parent's
obligations under Section 7.1, the Stockholder hereby agrees and represents to
Parent as follows:
 
          (a) The Stockholder has been advised that the offer, sale and delivery
     of the Parent Common Stock to the Stockholder pursuant to the Merger may
     not be registered under the Securities Act, despite Parent's obligations to
     use commercially reasonable efforts to effect such registration. The
     Stockholder has been advised that if the offer, sale and delivery of the
     Parent Common Stock to the Stockholder pursuant to the Merger has not been
     registered under the Securities Act, then the Merger Shares may not be
     offered, sold, pledged, hypothecated or otherwise transferred unless
     subsequently registered under the Securities Act or an exemption from such
     registration is available. The Stockholder has also been advised that even
     if the sale and delivery to the Stockholder of the Merger Shares is
     registered under the Securities Act, to the extent the Stockholder is
     considered an "affiliate" of Target at the time the Merger Agreement is
     submitted for a vote of the Target Stockholders, any public offering or
     sale by the Stockholder of the Merger Shares will, under current law,
     require either (i) the further registration under the Securities Act of the
     Merger Shares, which Parent is obligated under Section 7.1 to use
     commercially reasonable efforts to effect, (ii) compliance with Rule 145
     promulgated by the SEC under the Securities Act or (iii) the availability
     of another exemption from such registration under the Securities Act.
 
          (b) The Stockholder has read this Agreement and the Merger Agreement
     and has discussed their requirements and other applicable limitations upon
     its ability to sell, transfer or otherwise dispose of the Merger Shares, to
     the extent the Stockholder believed necessary, with its counsel or counsel
     for Target.
 
          (c) The Stockholder also understands that stop transfer instructions
     will be given to Parent's transfer agents with respect to the Merger Shares
     and that a legend will be placed on the certificates for the Merger Shares
     issued to the Stockholder, to the extent the Stockholder is considered an
     "affiliate" of Target at the time the Merger Agreement is submitted for a
     vote of the Target Stockholders.
 
     9. Additional Documents. The Stockholder and Parent hereby covenant and
agree to execute and deliver any additional documents necessary or desirable, in
the reasonable opinion of Parent's legal counsel or the Stockholder, as the case
may be, to carry out the intent of this Agreement.
 
     10. Consent and Waiver. The Stockholder hereby gives any consent or waivers
that are reasonably required for the consummation of the Merger under the terms
of any agreement to which the Stockholder is a party or pursuant to any rights
the Stockholder may have.
 
     11. Miscellaneous.
 
     (a) Severability. If any term, provision, covenant or restriction of this
Agreement is held by a court of competent jurisdiction to be invalid, void or
unenforceable, the remainder of the terms, provisions, covenants and
restrictions of this Agreement shall remain in full force and effect and shall
in no way be affected, impaired or invalidated.
 
     (b) Binding Effect and Assignment. This Agreement and all of the provisions
hereof shall be binding upon and inure to the benefit of the parties hereto and
their respective successors and permitted assigns, but, except as otherwise
specifically provided herein, neither this Agreement nor any of the rights,
interests or obligations of the parties hereto may be assigned by any of the
parties without the prior written consent of the other.
 
     (c) Amendments and Modifications. This Agreement may not be modified,
amended, altered or supplemented except upon the execution and delivery of a
written agreement executed by the parties hereto.
 
     (d) Specific Performance; Injunctive Relief. The parties hereto acknowledge
that Parent will be irreparably harmed and that there will be no adequate remedy
at law for a violation of any of the covenants or
 
                                      A-C-6
<PAGE>   172
 
agreements of the Stockholder set forth herein. Therefore, it is agreed that, in
addition to any other remedies that may be available to Parent upon such
violation, Parent shall have the right to enforce such covenants and agreements
by specific performance, injunctive relief or by any other means available to it
at law or in equity.
 
     (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and sufficient if delivered in
person, by commercial overnight courier service, by confirmed facsimile, or sent
by mail (registered or certified mail, postage prepaid, return receipt
requested) to the respective parties as follows:
 
         (i) if to Parent, to:
 
            DSC Communications Corporation
            1000 Coit Road
            Plano, Texas 75075
            Attention: General Counsel
            Facsimile No.: (972) 519-2321
 
            with a copy to:
 
            4500 Trammell Crow Center
            2001 Ross Avenue
            Dallas, Texas 75201
            Attention: Daniel W. Rabun
            Facsimile No.: (214) 965-5902
 
            Stockholder:
 
            ---------------------------------------------------------
 
            ---------------------------------------------------------
 
            ---------------------------------------------------------
 
            Attention:
            ---------------------------------------------
 
            Facsimile No.:
            ----------------------------------------
 
            with a copy to:
 
            ---------------------------------------------------------
 
            ---------------------------------------------------------
 
            ---------------------------------------------------------
 
            Attention:
            ---------------------------------------------
 
            Facsimile No.:
            ----------------------------------------
 
or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
only be effective upon receipt.
 
     (f) Governing Law. This Agreement shall be governed by, construed and
enforced in accordance with the laws of the State of Delaware without giving
effect to principles of conflicts of law.
 
     (g) Entire Agreement. This Agreement contains the entire understanding of
the parties in respect of the subject matter hereof, and supersedes all prior
negotiations and understanding between the parties with respect to such subject
matter.
 
     (h) Counterparts. This Agreement may be executed in counterparts, each of
which shall be an original, but all of which together shall constitute one and
the same agreement.
 
     (i) Effect of Headings. The section headings herein are for convenience
only and shall not affect the construction or interpretation of this Agreement.
 
                                      A-C-7
<PAGE>   173
 
     (j) Termination. Notwithstanding anything else in this Agreement, this
Agreement and the Proxy, and all obligations of the Stockholder under either of
them, shall automatically terminate as of the Expiration Date.
 
     (k) Covenant Not-to-Compete. [ROBERT GOODMAN ONLY]
 
          (i) Stockholder acknowledges that Parent is acquiring the goodwill of
     the Target. Therefore, Stockholder agrees that for a period commencing upon
     the Closing Date and ending upon the fifth anniversary thereof, unless
     otherwise extended pursuant to the terms hereof, Stockholder will not,
     directly or indirectly, either as an employer, consultant, agent,
     principal, partner, stockholder, or in any other capacity, engage or
     participate in any business that is involved in the development, marketing,
     manufacturing or sale of GSM or AMPS mobile switching centers (a
     "Prohibited Business"), within any state or country in which the Target or
     Parent or its Subsidiaries is conducting or reasonably expects to conduct
     or expend its business (the "Covenant Not-to-Compete"). Stockholder
     represents to Parent that the enforcement of the restriction contained in
     this Section 11(k) would not be unduly burdensome to Stockholder and that
     in order to induce Parent to enter into this Agreement, Stockholder further
     represents and acknowledges that Stockholder is willing and able to compete
     in other geographical areas not prohibited by this Section 11(k).
     Notwithstanding the foregoing, Stockholder shall not be prohibited from
     owning up to five percent (5%) of the outstanding capital stock of any
     class of capital stock registered under Section 12 (b) or (g) of the
     Exchange Act.
 
          (ii) Stockholder agrees that a breach or violation of the Covenant
     Not-to-Compete by Stockholder shall entitle Parent, as a matter of right,
     to an injunction issued by any court or arbitration panel of competent
     jurisdiction, restraining any further or continued breach or violation of
     this covenant. Such right to an injunction shall be cumulative and in
     addition to, and not in lieu of, any other remedies to which Parent may
     show itself justly entitled. Further, during any period in which
     Stockholder is in breach of the Covenant Not-to-Compete, the time period of
     the Covenant Not-to-Compete shall be extended for an amount of time that
     Stockholder is in breach hereof.
 
          (iii) In addition to the restrictions set forth in sub-paragraph (i)
     of this Section 11(k), Stockholder shall not for a period commencing upon
     the Closing Date and ending upon the first anniversary thereof, either
     directly or indirectly, (A) make known to any person, firm or corporation
     involved in a Prohibited Business the names and addresses of any of the
     customers of the Target or contacts of the Target or any other information
     pertaining to such persons, (B) call on, solicit, or take away, or attempt
     to call on, solicit or take away any of the customers of the Target on whom
     Stockholder called or with whom Stockholder became acquainted during
     Stockholder's association with the Target, for any other person, firm or
     corporation involved in a Prohibited Business or (C) recruit or hire or
     attempt to recruit or hire, directly or by assisting others, any employee,
     consultant or independent contractor of the Target.
 
          (iv) The representations and covenants contained in this Section 11 on
     the part of Stockholder will be construed as ancillary to and independent
     of any other provision of this Agreement, and the existence of any
     proceeding of Stockholder against the Target or any officer, director, or
     shareholder of Parent whether predicated on this Agreement or otherwise,
     shall not constitute a defense to the enforcement by Parent of the
     covenants of the Stockholder contained in this Section 11.
 
          (v) If Stockholder violates any covenant contained in this Section 11
     and Parent brings legal action for injunctive or other relief, Parent shall
     not, as a result of the time involved in obtaining the relief, be deprived
     of the benefit of the full period of any such covenant. Accordingly, the
     covenants of Stockholder contained in this Section 11 shall be deemed to
     have durations as specified above, which periods shall commence upon the
     Closing Date and shall be extended for the amount of time between the
     Closing Date and the date of entry by a court of competent jurisdiction of
     a final judgment enforcing the covenants of Stockholder in this Section 11.
 
          (vi) The parties to this Agreement agree that the limitations
     contained in this Section 11 with respect to geographic area, duration and
     scope of activity are reasonable. However, if any court shall determine
     that the geographic area, duration or scope of activity of any restriction
     contained in this
 
                                      A-C-8
<PAGE>   174
 
     Section 11 is unenforceable, it is the intention of the parties that such
     restrictive covenant set forth herein shall not thereby be terminated but
     shall be deemed amended to the extent required to render it valid and
     enforceable.
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed on the day and year first above written.
 
                                            DSC COMMUNICATIONS CORPORATION
 
                                            By:
                                            ------------------------------------
 
                                            Its:
                                            ------------------------------------
 
                                            Stockholder
 
                                            ------------------------------------
 
                                            Printed Name:
                                            ------------------------------------
 
                                      A-C-9
<PAGE>   175
 
                                    ANNEX A
 
                               IRREVOCABLE PROXY
 
     The undersigned holder of shares of capital stock (the "Stockholder") of
Celcore, Inc., a Delaware corporation ("Target"), hereby irrevocably appoints
and constitutes the members of the Board of Directors of DSC Communications
Corporation, a Delaware corporation ("Parent"), and each of them, (the
"Proxyholders"), the agents and proxies of the undersigned, with full power of
substitution and resubstitution, to the full extent of the undersigned's rights
with respect to the shares of capital stock of Target beneficially owned by the
undersigned, which shares are listed below (the "Shares"), and any and all other
shares or securities issued or issuable in respect thereof on or after the date
hereof and prior to the date this proxy terminates, to vote the Shares as
follows:
 
     If within five (5) business days after the commencement by Target of the
solicitation of Stockholder written consents for the adoption and approval of
the Merger Agreement (as such term is defined below), the Stockholder shall not
have executed and delivered to Target a duly and validly signed and dated
consent adopting and approving the Merger Agreement, and upon written notice to
Target with a copy to Target's counsel and prior to termination of this proxy,
the Proxyholder is empowered to exercise all voting and other rights (including
without limitation, the power to execute and deliver written consents with
respect to the Shares) of the undersigned at every annual, special or adjourned
meeting of Target Stockholders, and in every written consent in lieu of such a
meeting, or otherwise,
 
     In favor of approval of the (i) Merger (as defined in the Voting Agreement
dated October   , 1997 between the Stockholder and Parent (the "Voting
Agreement")) and that certain Agreement and Plan of Merger (the "Merger
Agreement") dated as of October 29, 1997 by and among Parent, CI Acquisition
Company, a Delaware corporation and a wholly-owned subsidiary of Parent ("Parent
Sub"), and Target, and any matter that could reasonably be expected to
facilitate the Merger, (ii) employment agreements for Messrs. Berger, Foley, and
Gonzalez which are being entered into with such individuals in connection with
the Merger and (iii) the waiver of the right of the undersigned to receive cash
or other property upon a liquidation of Target as provided in the certificate of
incorporation of Target or in any of the Certificates of Designations in respect
of any Target Preferred Stock.
 
     The Proxyholder may not exercise this proxy on any other matter. The
undersigned Stockholder may vote the Shares on all such other matters.
 
     The proxy granted by the Stockholder to the Proxyholder hereby is granted
as of the date of this Agreement in order to secure the obligations of the
Stockholders set forth in Section 2 of the Voting Agreement, and is irrevocable
and coupled with an interest in such obligations and in the interests in Target
to be purchased and sold pursuant the Merger Agreement. This proxy will
terminate upon the termination of the Voting Agreement in accordance with its
terms.
 
     Upon the execution hereof, all prior proxies given by the undersigned with
respect to the Shares and any and all other shares or securities issued or
issuable in respect thereof on or after the date hereof are hereby revoked and
no subsequent proxies will be given until such time as this proxy shall be
terminated in accordance with its terms.
 
     Any obligation of the undersigned hereunder shall be binding upon the
successors and assigns of the undersigned. The undersigned Stockholder
authorizes the Proxyholder to file this proxy and any substitution with the
Secretary of Target and with any Inspector of Elections at any meeting of the
Target Stockholders.
 
                                     A-C-10
<PAGE>   176
 
     This proxy is irrevocable and shall survive the insolvency, incapacity,
death or liquidation of the undersigned.
 

                          Dated: _______________________, 1997

                          Signature of Stockholder: _______________________

                          Print name of Stockholder: ______________________

                          Shares beneficially owned:

                          ________ shares of Target Common Stock
 
                          ________ shares of Target Series A Preferred Stock

                          ________ shares of Target Series B Preferred Stock

                          ________ shares of Target Series C Preferred Stock

                          ________ shares of Target Series D Preferred Stock


                                    A-C-11
<PAGE>   177
 
                                                                       EXHIBIT D
 
                        TAX OPINION OF BAKER & MCKENZIE
 
                         [BAKER & MCKENZIE LETTERHEAD]
 
                                            , 1997
 
DSC Communications Corporation
1000 Coit Road
Plano, Texas 75075
 
Gentlemen:
 
     We have acted as counsel to DSC Communications Corporation, a Delaware
corporation ("Parent"), in connection with the execution and delivery of the
Agreement and Plan of Merger (the "Agreement"), dated as of October 29, 1997,
among Parent, CI Acquisition Company, a Delaware corporation and a direct,
wholly-owned subsidiary of Parent ("Parent Sub"), and Celcore, Inc., a Delaware
corporation (the "Target"), providing for the merger of Parent Sub with and into
the Target (the "Merger"). This opinion letter is being furnished to you,
pursuant to Section 7.01(i) of the Agreement. Unless otherwise defined herein or
the context hereof otherwise requires, each term used herein with its initial
letter capitalized has the meaning given to such term in the Agreement.
 
     In preparing our opinion, we have reviewed and relied upon, the Agreement,
the representations and warranties made by Parent, Parent Sub and Target in the
Agreement, and other documents as we have deemed necessary.
 
     In addition, in preparing our opinion we have assumed that (i) the Merger
will be effected in accordance with the terms of the Agreement, (ii) the
representations made by Target, Parent and Parent Sub are true and accurate in
all material respects, and (iii) there will be no change in any of the facts
material to this opinion between the date of this opinion and the Effective
Time. We have not made any independent investigation of any of the facts
material to this opinion, other than as described above.
 
     Furthermore, we have assumed that there is no plan or intention on the part
of Target Stockholders to dispose of a number of shares of Parent Common Stock
to be issued to such stockholders in the Merger, sufficient to reduce the
Target's Stockholders' ownership of Parent Common Stock to a number of shares
having an aggregate fair market value, as of the Effective Time of the Merger,
of less than fifty percent (50%) of the aggregate fair market value, immediately
prior to the Merger, of all outstanding shares of Target Common Stock and Target
Preferred Stock.
 
     Our opinion is based on the Code, the currently applicable Treasury
Regulations promulgated under the Code, published administrative positions of
the Internal Revenue Service ("IRS") and judicial decisions. Such authorities
are all subject to change, either prospectively or retroactively. No assurances
can be provided as to the effect of any such changes upon the opinion given
herein. Our opinion represents our best legal judgment as to the United States
federal income tax consequences of the Merger; it is not, however, binding on
the IRS or the courts.
 
     Based upon and subject to the foregoing, we are of the opinion that the
Merger will, under current law, constitute a tax-free reorganization under
Section 368(a)(1)(A) of the Code by reason of the application of Section
368(a)(2)(E) of the Code, and under Section 368(a)(1)(B) of the Code. Parent,
Parent Sub and Target will each be a party to the reorganization within the
meaning of Section 368(b) of the Code. As a tax-free reorganization, the Merger
will have the following federal income tax consequences for the Target
stockholders, Target, Parent and Parent Sub:
 
          1. No gain or loss will be recognized by the holders of shares of
     Target Common Stock or Target Preferred Stock (collectively, the "Target
     Stock") as a result of the exchange of such shares of Target Stock for
     shares of Parent Common Stock pursuant to the Merger, except that holders
     of Target Stock who receive cash proceeds in lieu of fractional shares of
     Parent Common Stock will recognize gain or loss
 
                                      A-D-1
<PAGE>   178
 
     equal to the difference, if any, between such proceeds and the tax basis of
     the shares of Target Stock allocated to their fractional share interests,
     and such gain or loss, if any, will be capital gain or loss if their
     fractional interests are held as capital assets at the time of their sale.
     Code Section 354(a). Capital gain or loss will be long-term capital gain or
     loss if the fractional interests exchanged are held for more than one year.
     Code Section 1222.
 
          2. The tax basis of the shares of Parent Common Stock received by each
     Target Stockholder will equal the tax basis of such Target Stockholder's
     shares of Target Stock exchanged in the Merger less the tax basis allocated
     to fractional share interests. Code Section 358(a).
 
          3. The holding period for the shares of Parent Common Stock received
     by each Target Stockholder will include the holding period for the shares
     of Target Stock of such Target Stockholder exchanged in the Merger. Code
     Section 1223(1).
 
          4. Parent will not recognize gain or loss as a result of the Merger.
     Code Section 1032.
 
          5. Target will not recognize gain or loss as a result of the Merger.
 
          6. Parent Sub will not recognize gain or loss as a result of the
     Merger. Code Section 361(a).
 
          7. The tax basis of the shares of Target Stock received by Parent
     will, at the election of Parent, equal either: (i) Parent's tax basis in
     its Parent Sub stock immediately prior to the Merger plus Target's net tax
     basis of Target's assets and liabilities immediately prior to the Merger,
     or (ii) the tax basis of the Target Stock in the hands of Target's
     stockholders immediately prior to the Merger. Code Section 362(b) and
     Treasury Regulation Section 1.358-6(c)(2)(ii).
 
     Except as set forth above, we express no opinion as to the tax consequences
to any party, whether federal, state, local or foreign, of the Merger or of any
transactions related to the Merger. This opinion is being furnished only to you
in connection with the Merger solely for your benefit in connection therewith
and may not be used or relied upon for any other purpose and may not be
circulated, quoted or otherwise referred to for any other purpose without our
express written consent, except that we consent to the filing of this opinion as
an Exhibit to the Registration Statement.
 
                                            Very truly yours,
 
                                            BAKER & MCKENZIE
 
                                      A-D-2
<PAGE>   179
 
                                                                       EXHIBIT E
 
             TAX OPINION OF POWELL, GOLDSTEIN, FRAZER & MURPHY LLP
 
                    [POWELL, GOLDSTEIN, FRAZER & MURPHY LLP]
 
                                           , 1997
 
Celcore, Inc.
3800 Forest Hill-Irene Road
Memphis, Tennessee 38125
 
Gentlemen:
 
     We have acted as counsel to Celcore, Inc., a Delaware corporation (the
"Target"), in connection with the execution and delivery of the Agreement and
Plan of Merger (the "Agreement"), dated as of October 29, 1997, among DSC
Communications Corporation, a Delaware corporation ("Parent"), CI Acquisition
Company, a Delaware corporation and a direct, wholly-owned subsidiary of Parent
("Parent Sub"), and, providing for the merger of Parent Sub with and into the
Target (the "Merger"). This opinion letter is being furnished to you, pursuant
to Section 7.01(i) of the Agreement. Unless otherwise defined herein or the
context hereof otherwise requires, each term used herein with its initial letter
capitalized has the meaning given to such term in the Agreement.
 
     In preparing our opinion, we have reviewed and relied upon, the Agreement,
the representations and warranties made by Parent, Parent Sub and Target in the
Agreement, and other documents as we have deemed necessary.
 
     In addition, in preparing our opinion we have assumed that (i) the Merger
will be effected in accordance with the terms of the Agreement, (ii) the
representations made by Target, Parent and Parent Sub are true and accurate in
all material respects, and (iii) there will be no change in any of the facts
material to this opinion between the date of this opinion and the Effective
Time. We have not made any independent investigation of any of the facts
material to this opinion, other than as described above.
 
     Furthermore, we have assumed that there is no plan or intention on the part
of Target Stockholders to dispose of a number of shares of Parent Common Stock
to be issued to such stockholders in the Merger, sufficient to reduce the
Target's Stockholders' ownership of Parent Common Stock to a number of shares
having an aggregate fair market value, as of the Effective Time of the Merger,
of less than fifty percent (50%) of the aggregate fair market value, immediately
prior to the Merger, of all outstanding shares of Target Common Stock and Target
Preferred Stock.
 
     Our opinion is based on the Code, the currently applicable Treasury
Regulations promulgated under the Code, published administrative positions of
the Internal Revenue Service ("IRS") and judicial decisions. Such authorities
are all subject to change, either prospectively or retroactively. No assurances
can be provided as to the effect of any such changes upon the opinion given
herein. Our opinion represents our best legal judgment as to the United States
federal income tax consequences of the Merger; it is not, however, binding on
the IRS or the courts.
 
     Based upon and subject to the foregoing, we are of the opinion that the
Merger will, under current law, constitute a tax-free reorganization under
Section 368(a)(1)(A) of the Code by reason of the application of Section
368(a)(2)(E) of the Code, and under Section 368(a)(1)(B) of the Code. Parent,
Parent Sub and Target will each be a party to the reorganization within the
meaning of Section 368(b) of the Code. As a tax-free reorganization, the Merger
will have the following federal income tax consequences for Target Stockholders,
Target, Parent and Parent Sub:
 
          1. No gain or loss will be recognized by the holders of shares of
     Target Common Stock or Target Preferred Stock (collectively, the "Target
     Stock") as a result of the exchange of such shares of Target Stock for
     shares of Parent Common Stock pursuant to the Merger, except that holders
     of Target Stock
 
                                      A-E-1
<PAGE>   180
 
     who receive cash proceeds in lieu of fractional shares of Parent Common
     Stock will recognize gain or loss equal to the difference, if any, between
     such proceeds and the tax basis of the shares of Target Stock allocated to
     their fractional share interests, and such gain or loss, if any, will be
     capital gain or loss if their fractional interests are held as capital
     assets at the time of their sale. Code Section 354(a). Capital gain or loss
     will be long-term capital gain or loss if the fractional interests
     exchanged are held for more than one year. Code Section 1222.
 
          2. The tax basis of the shares of Parent Common Stock received by each
     Target Stockholder will equal the tax basis of such Target Stockholder's
     shares of Target Stock exchanged in the Merger less the tax basis allocated
     to fractional share interests. Code Section 358(a).
 
          3. The holding period for the shares of Parent Common Stock received
     by each Target Stockholder will include the holding period for the shares
     of Target Stock of such Target Stockholder exchanged in the Merger. Code
     Section 1223(1).
 
          4. Parent will not recognize gain or loss as a result of the Merger.
     Code Section 1032.
 
          5. Target will not recognize gain or loss as a result of the Merger.
 
          6. Parent Sub will not recognize gain or loss as a result of the
     Merger. Code Section 361(a).
 
          7. The tax basis of the shares of Target Stock received by Parent
     will, at the election of Parent, equal either: (i) Parent's tax basis in
     its Parent Sub stock immediately prior to the Merger plus Target's net tax
     basis of Target's assets and liabilities immediately prior to the Merger,
     or (ii) the tax basis of the Target Stock in the hands of Target's
     stockholders immediately prior to the Merger. Code Section 362(b) and
     Treasury Regulation Section 1.358-6(c)(2)(ii).
 
     Except as set forth above, we express no opinion as to the tax consequences
to any party, whether federal, state, local or foreign, of the Merger or of any
transactions related to the Merger. This opinion is being furnished only to you
in connection with the Merger solely for your benefit in connection therewith
and may not be used or relied upon for any other purpose and may not be
circulated, quoted or otherwise referred to for any other purpose without our
express written consent, except that we consent to the filing of this opinion as
an Exhibit to the Registration Statement.
 
                                            Very truly yours,
 
                                            POWELL, GOLDSTEIN, FRAZER
                                            & MURPHY LLP
 
                                      A-E-2
<PAGE>   181
 
                                                                       EXHIBIT F
 
                         TARGET COUNSEL OPINION LETTER
 
                          [TARGET COUNSEL LETTERHEAD]
 
                                            , 1997
 
DSC Communications Corporation
1000 Coit Road
Plano, Texas 75075
 
Gentlemen:
 
     We have acted as counsel to Celcore, Inc., a Delaware corporation (the
"Target"), in connection with the execution and delivery of the Agreement and
Plan of Merger (the "Agreement"), dated as of October 29, 1997, among DSC
Communications Corporation, a Delaware corporation ("Parent"), CI Acquisition
Company, a Delaware corporation and a direct, wholly-owned subsidiary of Parent
("Parent Sub"), and Target providing for the merger of Parent Sub with and into
Target (the "Merger"). This opinion letter is being furnished to you pursuant to
Section 7.02 of the Agreement. Unless otherwise defined herein or the context
hereof otherwise requires, each term used herein with its initial letter
capitalized has the meaning given to such term in the Agreement.
 
     We have examined and are familiar with originals or copies, certified or
otherwise authenticated to our satisfaction, of such documents and records of
Target and each Target Subsidiary, and such statutes, regulations and
instruments as we have deemed necessary or advisable for the purposes of this
opinion letter, including, without limitation, (i) the Agreement, (ii) the
Certificate of Merger dated as of             , 1997 between Target and Parent
Sub and (iii) the certificate of incorporation and bylaws of Target.
 
     As to certain facts material to our opinions herein, we have assumed the
accuracy of the representations of Target in the Agreement and of one or more
officers of Target. In addition, we have assumed that all signatures on all
documents presented to us are genuine, that all documents submitted to us as
originals are accurate and complete, that all documents submitted to us as
copies are true and complete copies of the originals thereof, that all
information submitted to us was accurate and complete, and that all persons
executing and delivering originals or copies of documents examined by us were
competent to execute and deliver such documents. We have also assumed the due
authorization, execution and delivery by the Parent and Parent Sub of the
Agreement and the Certificate of Merger and that the Agreement and the
Certificate of Merger constitute legal, valid and binding obligations of the
Parent and Parent Sub enforceable against each of them in accordance with their
terms.
 
     Based upon the foregoing and subject to the qualifications and limitations
set forth below, we are of the opinion that:
 
          1. Target is duly incorporated, validly existing and in good standing
     under the Laws of the jurisdiction of its incorporation and has the
     requisite corporate power and authority to own, lease and operate its
     properties and to carry on its business as it is now being conducted.
     Target is duly qualified or licensed as a foreign corporation to do
     business, and is in good standing in each jurisdiction where the character
     of the properties owned, leased or operated by it or the nature of its
     business makes such qualification or licensing necessary, except where the
     failure to be qualified or licensed would not have a Material Adverse
     Effect.
 
          2. Target has all necessary corporate power and authority to execute
     and deliver the Agreement and to perform its obligations thereunder and to
     consummate the Merger and the Transactions. The execution and delivery of
     the Agreement by Target and the consummation by Target of the Transactions
     have been duly and validly authorized by all necessary corporate action and
     no other corporate proceedings on the part of Target are necessary to
     authorize the Agreement or to consummate the Merger and the
 
                                      A-F-1
<PAGE>   182
 
     Transactions (other than the recordation of an appropriate Certificate of
     Merger with the Secretary as required by Delaware Law).
 
          3. The Agreement has been duly and validly executed and delivered by
     Target and constitutes a legal, valid and binding obligation of Target,
     enforceable against Target in accordance with its terms, except as may be
     (i) limited by bankruptcy, insolvency, fraudulent conveyance,
     reorganization, moratorium, or other Laws affecting enforcement of
     creditors' rights generally, and (ii) subject to general principles of
     equity, regardless of whether enforcement is considered in a Proceeding at
     law or in equity.
 
          4. The execution and delivery of the Agreement by Target do not, and
     the performance of the Agreement by Target and the consummation of the
     Merger and the Transactions will not, (i) conflict with or violate the
     certificate of incorporation or bylaws of Target, (ii) conflict with or
     violate Delaware Law or the laws of the United States of America, or (iii)
     to the best of our knowledge, result in any breach of or constitute a
     default (or an event which with notice or lapse of time or both would
     become a default) under, or give to others any right of termination,
     amendment, acceleration or cancellation of, or result in the creation of a
     lien or other encumbrance on any property or asset of Target or the Target
     Subsidiaries or require the Consent of any third party pursuant to, any
     note, bond, mortgage, indenture, Contract, license, permit, franchise or
     other instrument or obligation to which Target or the Target Subsidiaries
     is a party or by which Target or the Target Subsidiaries or any property or
     asset of Target or the Target Subsidiaries is bound or affected.
 
          5. The execution and delivery of the Agreement by Target do not, and
     the performance of the Agreement and the Merger and the Transactions
     contemplated thereby by Target will not, require any Consent or permit of,
     or filing with or notification to, any federal or Delaware Governmental
     Authority, except the filing and recordation of an appropriate Certificate
     of Merger with the Secretary as required by Delaware Law.
 
          6. Upon the issuance of a Certificate of Merger by the Secretary, the
     Merger will become effective in accordance with the Agreement and the
     Delaware Law, and each issued and outstanding share of Target Stock (other
     than Dissenting Shares) will be converted into the consideration provided
     in Section 2.01 of the Agreement.
 
          7. To the best of our knowledge, except as set forth in the Target
     Disclosure Schedule, no Proceedings are pending or Threatened against
     Target or the Target Subsidiaries seeking to prevent or delay the Merger or
     the Transactions contemplated by the Agreement or challenging any of the
     terms or provisions of the Agreement or seeking material damages in
     connection therewith.
 
          8. Immediately prior to the Merger, the authorized capital stock of
     Target and each of the Target Subsidiaries is as set forth in Section 3.03
     of the Agreement. Each share of Target Preferred Stock is convertible into
     one share of Target Common Stock. All of the issued and outstanding shares
     of capital stock of the Target Subsidiaries are held by Target and are
     validly issued, fully paid and nonassessable and, to the best of our
     knowledge, not subject to preemptive rights, except as identified in this
     Opinion. To the best of our knowledge, no shares of capital stock of the
     Target have been acquired by the Target that are subject to outstanding
     pledges by the Target to secure the future payment of some or all of the
     purchase price for such shares. To the best of our knowledge, other than
     the Target Options, as of the date of this Agreement, there are no options,
     warrants or other rights, agreements, arrangements or commitments of any
     character relating to the issued or unissued capital stock of the Target
     obligating the Target to issue or sell any shares of capital stock of, or
     other equity interests in, the Target or the Target Subsidiaries. To the
     best of our knowledge, other than as set forth in Target's certificate of
     incorporation (including the Target Certificate of Designations), there are
     no outstanding contractual obligations of the Target to repurchase, redeem
     or otherwise acquire any shares of Target Stock.
 
          9. The Board of Directors of Target has approved the terms of the
     Agreement and the Merger and the other Transactions, and such approval is
     sufficient to render inapplicable to the Merger and the other Transactions
     the provisions of Section 203 of the Delaware Law.
 
                                      A-F-2
<PAGE>   183
 
     We have participated in conferences with officers and other representatives
of Parent, Parent Sub and Target, and representatives of the independent
auditors for Target and Parent, at which the contents of the Registration
Statement on Form S-4 (File No. 333-          ) declared effective by the SEC on
            , 1997 (the "Registration Statement"), the Proxy
Statement/Prospectus dated             , 1997 included in the Registration
Statement (the "Proxy Statement") and related matters were discussed. We are not
passing upon, do not assume any responsibility for and have not, and shall not
be deemed to have, independently verified the accuracy, completeness, or
fairness of the statements contained in the Registration Statement and the Proxy
Statement; however, on the basis of our participation in the preparation of the
Proxy Statement and the Registration Statement and our participation in
discussions relating to the contents thereof, no facts have come to our
attention which lead us to believe that the information with respect to Target
and the Target Subsidiaries contained in the Registration Statement or the Proxy
Statement (except for the financial information, financial statements, financial
schedules and other financial or statistical data contained therein, as to which
we express no opinion), on the date such Registration Statement became effective
under the Securities Act, on the date such Proxy Statement was first mailed to
Target Stockholders, on the date of the Target's Stockholder Meeting convened to
consider the Merger, or on the date hereof, contained or contains any untrue
statement of a material fact or omitted or omits to state a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading.
 
     The preceding opinions and "negative assurance" statements are subject to
the following qualifications and limitations:
 
          A. In connection with statements herein qualified by "to our
     knowledge" or as to matters that have "come to our attention," our
     examination has been limited to discussions with the officers and other
     representatives of Target and each Target Subsidiary by, and those
     statements refer only to what is in the actual knowledge of, attorneys of
     this Firm who have been involved in the representation of Target and the
     Target Subsidiaries in connection with the Merger and the Transactions
     described in the Agreement, and we have made no independent investigations
     as to the accuracy or completeness of any of the representations,
     warranties, data or other information, written or oral, made or furnished
     by Parent or Parent Sub to us or to you.
 
          B. The opinions and statements expressed herein are limited to the
     matters specifically addressed, and no opinion or statement is implied or
     may be inferred beyond the matters so specifically addressed.
 
          C. With respect to the opinion expressed in Paragraph 7, we have not
     conducted any search of any indexes, dockets or other records of any court
     or other Governmental Authority.
 
          D. The opinions and statements expressed herein are rendered as of the
     time immediately preceding the Effective Time, and we hereby disclaim any
     obligation to advise you of, or to supplement any of our opinions or
     statements because of, any changes in fact or Law which might affect any of
     those opinions or statements.
 
          E. We are licensed to practice law only in the State of Georgia and
     are therefore unable to render an opinion regarding the laws of any
     jurisdiction other than the State of Georgia. Accordingly, for purposes of
     this opinion we have assumed that the laws of the State of Georgia and
     Delaware or any other jurisdiction that is the subject of this opinion are
     the same. Notwithstanding the foregoing, we are able to render an opinion
     with respect to any matter covered by this opinion that is governed or
     controlled by Delaware Law and accordingly our opinion is not subject to
     the foregoing limitation to the extent it relates to Delaware Law.
 
                                      A-F-3
<PAGE>   184
 
          F. This opinion letter is solely for your benefit in connection with
     the Merger and the Transactions described in the Agreement and may not be
     relied upon, quoted or otherwise used by any other person or entity or for
     any other purpose without our express written consent.
 
                                            Very truly yours,
 
                                            POWELL, GOLDSTEIN, FRAZER
                                            & MURPHY LLP
 
                                      A-F-4
<PAGE>   185
 
                                                                       EXHIBIT G
 
                         PARENT COUNSEL OPINION LETTER
 
                          [PARENT COUNSEL LETTERHEAD]
 
                                            , 1997
 
Celcore, Inc.
3800 Forest Hill-Irene Road
Memphis, Tennessee 38125
 
Gentlemen:
 
     We have acted as counsel to DSC Communications Corporation, a Delaware
corporation ("Parent"), and CI Acquisition Company, a Delaware corporation and a
direct, wholly-owned subsidiary of Parent ("Parent Sub"), in connection with the
execution and delivery of the Agreement and Plan of Merger (the "Agreement"),
dated as of October 29, 1997, among Parent, Parent Sub and Celcore, Inc., a
Delaware corporation (the "Target"), providing for the merger of Parent Sub with
and into Target (the "Merger"). This opinion letter is being furnished to you
pursuant to Section 7.03 of the Agreement. Unless otherwise defined herein or
the context hereof otherwise requires, each term used herein with its initial
letter capitalized has the meaning given to such term in the Agreement.
 
     We have examined and are familiar with originals or copies, certified or
otherwise authenticated to our satisfaction, of such documents and records of
Parent and Parent Sub, and such statutes, regulations and instruments as we have
deemed necessary or advisable for the purposes of this opinion letter, including
without limitation, (i) the Agreement, (ii) the Certificate of Merger dated as
of             , 1997 between Target and Parent Sub and (iii) the certificates
of incorporation and bylaws of Parent and Parent Sub.
 
     As to certain facts material to our opinions herein, we have assumed the
accuracy of the representations of Parent and Parent Sub in the Agreement and of
one or more officers of Parent or Parent Sub. In addition, we have assumed that
all signatures on all documents presented to us are genuine, that all documents
submitted to us as originals are accurate and complete, that all documents
submitted to us as copies are true and complete copies of the originals thereof,
that all information submitted to us was accurate and complete, and that all
persons executing and delivering originals or copies of documents examined by us
were competent to execute and deliver such documents. We have also assumed the
due authorization, execution and delivery by Target of the Agreement and the
Certificate of Merger and that the Agreement and the Certificate of Merger
constitute legal, valid and binding obligations of Target enforceable against
Target in accordance with their terms.
 
     Based upon the foregoing and subject to the qualifications and limitations
set forth below, we are of the opinion that:
 
          1. Each of Parent and Parent Sub is duly incorporated, validly
     existing and in good standing under the Laws of the jurisdiction of its
     incorporation and has the requisite corporate power and authority to own,
     lease and operate its properties and to carry on its business as it is now
     being conducted. Each of Parent and Parent Sub is duly qualified or
     licensed as a foreign corporation to do business, and is in good standing
     in each jurisdiction where the character of the properties owned, leased or
     operated by it or the nature of its business makes such qualification or
     licensing necessary, except where the failure to be qualified or licensed
     would not have a Material Adverse Effect.
 
          2. Each of Parent and Parent Sub has all necessary corporate power and
     authority to execute and deliver the Agreement and to perform its
     obligations thereunder and to consummate the Merger and the Transactions.
     The execution and delivery of the Agreement by Parent and Parent Sub and
     the consummation by Parent and Parent Sub of the Transactions have been
     duly and validly authorized by all necessary corporate action and no other
     corporate proceedings on the part of Parent or Parent Sub are
 
                                      A-G-1
<PAGE>   186
 
     necessary to authorize the Agreement or to consummate the Merger and the
     Transactions (other than the recordation of an appropriate Certificate of
     Merger with the Secretary as required by Delaware Law).
 
          3. The Agreement has been duly and validly executed and delivered by
     Parent and Parent Sub and constitutes a legal, valid and binding obligation
     of each of Parent and Parent Sub, enforceable against each of Parent and
     Parent Sub in accordance with its terms, except as may be (i) limited by
     bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium,
     or other Laws affecting enforcement of creditors' rights generally, and
     (ii) subject to general principles of equity, regardless of whether
     enforcement is considered in a Proceeding at law or in equity.
 
          4. The execution and delivery of the Agreement by Parent and Parent
     Sub do not, and the performance of the Agreement by Parent and Parent Sub
     and the consummation of the Merger and the Transactions will not, (i)
     conflict with or violate the certificate of incorporation or bylaws of
     either Parent or Parent Sub, (ii) conflict with or violate Delaware Law or
     the laws of the United States of America, or (iii) to the best of our
     knowledge, result in any breach of or constitute a default (or an event
     which with notice or lapse of time or both would become a default) under,
     or give to others any right of termination, amendment, acceleration or
     cancellation of, or result in the creation of a lien or other encumbrance
     on any property or asset of Parent or Parent Sub or require the Consent of
     any third party pursuant to, any note, bond, mortgage, indenture, Contract,
     license, permit, franchise or other instrument or obligation to which
     Parent or Parent Sub is a party or by which Parent or Parent Sub or any
     property or asset of Parent or Parent Sub is bound or affected.
 
          5. The execution and delivery of the Agreement by Parent and Parent
     Sub do not, and the performance of the Agreement and the Merger and the
     Transactions contemplated thereby by Parent and Parent Sub will not,
     require any Consent or permit of, or filing with or notification to, any
     federal or Delaware Governmental Authority, except the filing and
     recordation of an appropriate Certificate of Merger with the Secretary as
     required by Delaware Law.
 
          6. Upon the issuance of a Certificate of Merger by the Secretary, the
     Merger will become effective in accordance with the Agreement and the
     Delaware Law, and each issued and outstanding share of Target Stock (other
     than Dissenting Shares) will be converted into the consideration provided
     in Section 2.01 of the Agreement.
 
          7. To the best of our knowledge, except as set forth in the Parent
     Disclosure Schedule, no Proceedings are pending or Threatened against
     Parent or Parent Sub seeking to prevent or delay the Merger or the
     Transactions contemplated by the Agreement or challenging any of the terms
     or provisions of the Agreement or seeking material damages in connection
     therewith.
 
     We have participated in conferences with officers and other representatives
of Parent, Parent Sub and Target, and representatives of the independent
auditors for Target and Parent, at which the contents of the Registration
Statement on Form S-4 (File No. 333-          ) declared effective by the SEC on
            , 1997 (the "Registration Statement"), the Proxy
Statement/Prospectus dated             , 1997 included in the Registration
Statement (the "Proxy Statement") and related matters were discussed. We are not
passing upon, do not assume any responsibility for and have not, and shall not
be deemed to have, independently verified the accuracy, completeness, or
fairness of the statements contained in the Registration Statement and the Proxy
Statement; however, on the basis of our participation in the preparation of the
Proxy Statement and the Registration Statement and our participation in
discussions relating to the contents thereof, no facts have come to our
attention which lead us to believe that the information with respect to Parent
and Parent Sub contained in the Registration Statement or the Proxy Statement
(except for the financial information, financial statements, financial schedules
and other financial or statistical data contained therein, as to which we
express no opinion), on the date such Registration Statement became effective
under the Securities Act, on the date such Proxy Statement was first mailed to
Target Stockholders, on the date of the Target's Stockholder Meeting convened to
consider the Merger, or on the date hereof, contained or contains any untrue
statement of a material fact or omitted or omits to state a material fact
required to be stated therein or necessary to make the statements therein, in
light of the circumstances under which they were made, not misleading.
 
                                      A-G-2
<PAGE>   187
 
     The preceding opinions and "negative assurance" statements are subject to
the following qualifications and limitations:
 
          A. In connection with statements herein qualified by "to our
     knowledge" or as to matters that have "come to our attention," our
     examination has been limited to discussions with the officers and other
     representatives of Parent and Parent Sub by, and those statements refer
     only to what is in the actual knowledge of, attorneys in the Dallas,
     Chicago and Washington D.C. offices of this Firm who have been involved in
     the representation of Parent and Parent Sub in connection with the Merger
     and the Transactions described in the Agreement, and we have made no
     independent investigations as to the accuracy or completeness of any of the
     representations, warranties, data or other information, written or oral,
     made or furnished by Target or the Target Subsidiaries to us or to you.
 
          B. The opinions and statements expressed herein are limited to the
     matters specifically addressed, and no opinion or statement is implied or
     may be inferred beyond the matters so specifically addressed.
 
          C. With respect to the opinion expressed in Paragraph 7, we have not
     conducted any search of any indexes, dockets or other records of any court
     or other Governmental Authority.
 
          D. The opinions and statements expressed herein are rendered as of the
     time immediately preceding the Effective Time, and we hereby disclaim any
     obligation to advise you of, or to supplement any of our opinions or
     statements because of, any changes in fact or Law which might affect any of
     those opinions or statements.
 
          E. We are licensed to practice law only in the State of Texas and are
     therefore unable to render an opinion regarding the laws of any
     jurisdiction other than the State of Texas. Accordingly, for purposes of
     this opinion we have assumed that the laws of the State of Texas and
     Delaware or any other jurisdiction that is the subject of this opinion are
     the same. Notwithstanding the foregoing, we are able to render an opinion
     with respect to any matter covered by this opinion that is governed or
     controlled by Delaware Law and accordingly our opinion is not subject to
     the foregoing limitation to the extent it relates to Delaware Law.
 
          F. This opinion letter is solely for your benefit in connection with
     the Merger and the Transactions described in the Agreement and may not be
     relied upon, quoted or otherwise used by any other person or entity or for
     any other purpose without our express written consent.
 
                                            Very truly yours,
 
                                            BAKER & MCKENZIE
 
                                      A-G-3
<PAGE>   188
 
                                                                       EXHIBIT H
 
                         DSC COMMUNICATIONS CORPORATION
 
                       DSC SPECIAL CELCORE INCENTIVE PLAN
 
                           SCOPE AND PURPOSE OF PLAN
 
     This DSC Special Celcore Incentive Plan (the "Plan") provides for the
granting of:
 
     (a) Options (hereinafter defined) to certain employees of DSC
         Communications Corporation, a Delaware corporation (the "Corporation"),
         or its Affiliates (as hereinafter defined) who are Eligible Individuals
         (as hereinafter defined), and
 
     (b) The right to cash payments (the "Cash Payments") to certain employees
         of the Corporation or its Affiliates who are Eligible Individuals.
 
This Plan is being implemented pursuant to the terms of the Agreement and Plan
of Merger (the "Merger Agreement"), dated as of October 29, 1997 by and among
the Corporation, CI Acquisition Company, a Delaware corporation and a direct,
wholly owned subsidiary of the Corporation, and CELCORE, INC., a Delaware
corporation ("Celcore").
 
SECTION 1. DEFINITIONS.
 
     "ACT" shall mean the Securities Exchange Act of 1934, as amended.
 
     "AFFILIATES" shall mean all persons and business entities, whether
corporations, partnerships, joint ventures or otherwise, which now or hereafter
control, or are owned or controlled, directly or indirectly, by the Corporation,
or are under common control with the Corporation.
 
     "AGGREGATE OPTION AMOUNT" shall mean (i) with respect to the Fiscal Year
ending December 31, 1998, an amount equal to $800,000 divided by the Closing
Sales Price, (ii) with respect to the Fiscal Year ending December 31, 1999, an
amount equal to $1,450,000 divided by the Closing Sales Price, and (iii) with
respect to each Fiscal Year ending December 31, 2000 and December 31, 2001, an
amount equal to the difference of (A) $2,250,000 minus (B) the then aggregate of
the Annual Option Vesting Amount for each of the Fiscal Years prior to the
Fiscal Year in question.
 
     "AGGREGATE OPTION SHARES" shall have the meaning set forth in Section 2.1
hereof.
 
     "AGGREGATE PAYMENT AMOUNT" shall mean (i) with respect to the Fiscal Year
ending December 31, 1998, an amount equal to $800,000, and (ii) with respect to
the Fiscal Year ending December 31, 1999, an amount equal to $1,450,000.
 
     "AGREEMENT" shall mean the written agreement between the Corporation and an
Eligible Individual in the form attached as Exhibit A hereto evidencing the
Option and Cash Payment granted by the Corporation.
 
     "ANNUAL OPTION VESTING AMOUNT" shall have the meaning set forth in Section
6.2(a) hereof.
 
     "ANNUAL PAYMENT AWARD" shall have the meaning set forth in Section 2.2
hereof.
 
     "APPLICABLE PERCENTAGE" shall mean with respect to a Fiscal Year, the sum
of (i) sixty percent (60%), plus (ii) the product of (A) two (2), times (B) the
difference of the Attained Percentage with respect to such Fiscal Year, minus
eighty percent (80%); provided, however, in the event the Applicable Percentage
for that Fiscal Year is less than zero, the Applicable Percentage for such
Fiscal Year shall be deemed to be zero.
 
     "ATTAINED PERCENTAGE" shall mean with respect to a Fiscal Year, the
percentage when expressed as a fraction has as its numerator the Celcore
Revenues with respect to that Fiscal Year and has as its denominator the Target
Revenue with respect to that Fiscal Year; provided that in no event shall the
Attained Percentage exceed one hundred twenty-five percent (125%).
 
     "BOARD OF DIRECTORS" shall mean the board of directors of the Corporation.
 
                                      A-H-1
<PAGE>   189
 
     "CASH PAYMENT" shall have the meaning set forth in the recitals hereof.
 
     "CAUSE" that amounts to (i) fraud or dishonesty against the Corporation or
its Affiliates, (ii) Eligible Individual's willful misconduct, repeated refusal
to follow the reasonable directions of the board of directors of the Corporation
or its Affiliates, or knowing violation of law in the course of performance of
the duties of Eligible Individual's service with the Corporation or its
Affiliates, (iii) repeated absences from work without a reasonable excuse, (iv)
repeated intoxication with alcohol or drugs while on the Corporation or
Affiliates' premises during regular business hours, (v) a conviction or plea of
guilty or nolo contendere to a felony or a crime involving dishonesty, (vi) a
breach or violation of the terms of any agreement to which an Eligible
Individual and the Corporation or its Affiliates are party, including, without
limitation, any agreement providing for the protection of the confidential
information or the proprietary rights of the Corporation or its Affiliates or
any agreement involving non-competition obligations of the Eligible Individual,
or (vii) the violation of the sexual harassment policy of the Corporation or any
of its Affiliates or the determination that such Eligible Individual has engaged
in any misconduct of a sexual nature that unreasonably interferes with an
individual's work performance or creates an intimidating, hostile or offensive
working environment at the Corporation or any of its Affiliates; provided,
however, notwithstanding the foregoing, in respect of Messrs. Berger, Gonzalez
and Foley, the term "Cause" shall have the meaning provided in their respective
Employment Agreements dated October 29, 1997.
 
     "CELCORE REVENUES" shall mean the revenues, if any, of the Corporation and
its Affiliates recognized by the Corporation under its revenue recognition
policy and attributable to the line of products currently being developed or
marketed by Celcore as of the Effective Time. For purposes of this Plan,
"Celcore Revenues" and "revenues" (i) shall be reduced by all discounts or
rebates, and Federal, state, county, city and local taxes and any charges for
shipping, duty or insurance, relating to the products and related services
referred to above and (ii) shall include revenues derived from services
associated with such products, including engineering, installation, repair,
service and training.
 
     "CLOSING SALES PRICE" shall mean the reported last sale prices of a share
of Stock on the NASDAQ National Market as reported on the date of the Effective
Time.
 
     "CODE" shall mean the Internal Revenue Code of 1986, as amended.
 
     "COMMITTEE" shall mean the committee appointed pursuant to Section 3 hereof
by the Board of Directors to administer this Plan.
 
     "EFFECTIVE TIME" shall have the meaning provided in the Merger Agreement.
 
     "ELIGIBLE INDIVIDUALS" shall mean the employees of the Corporation or its
Affiliates participating in the Plan.
 
     "FISCAL YEAR" shall mean the twelve months beginning on January 1 of any
year and ending on December 31 of the same year, except that the first Fiscal
Year shall begin on January 1, 1998 and shall end on December 31, 1998.
 
     "OPTION" shall mean any stock option which is granted by the Committee to
an Eligible Individual under the Plan.
 
     "PERCENTAGE PARTICIPATION" of an Eligible Individual with respect to the
Annual Payment Award and/or the Annual Option Vesting Amount, as the case may
be, for any Fiscal Year shall be the percentage opposite such Eligible
Individual's name as set forth on Schedule I hereto.
 
     "PERMANENT AND TOTAL DISABILITY" has the same meaning as provided in the
long-term disability plan or policy maintained or, if applicable, most recently
maintained, by the Corporation or, if applicable, any Affiliate of the
Corporation for the Eligible Individual. If no long-term disability plan or
policy was ever maintained on behalf of the Eligible Individual Permanent and
Total Disability shall mean that condition described in Code Section 22(e)(3),
as amended from time to time. In the event of a dispute, the determination of
Permanent and Total Disability shall be made by the Board of Directors and shall
be supported by advice of a physician competent in the area to which such
Permanent and Total Disability relates. The scope of this definition shall
 
                                      A-H-2
<PAGE>   190
 
automatically be reduced or expanded to the extent that section 22(e)(3) of the
Code is amended to reduce or expand the scope of the definition of Permanent and
Total Disability thereunder.
 
     "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.
 
     "STOCK" shall mean the Corporation's authorized $0.01 par value common
stock together with any other securities with respect to which Options granted
hereunder may become exercisable (including any preferred stock purchase rights
issuable pursuant to the Rights Agreement, dated April 25, 1996 between the
Corporation and Harris Trust and Savings Bank (formerly KeyCorp Shareholder
Services, Inc.) as rights agent, or any other purchase right issued in
substitution thereof).
 
     "TARGET REVENUE" shall mean an amount equal to (i) $60,000,000 with respect
to the Fiscal Year ending December 31, 1998, (ii) $110,000,000 with respect to
the Fiscal Year ending December 31, 1999, (iii) $215,000,000 with respect to
Fiscal Year ending December 31, 2000 and (iv) $300,000,000 with respect to
Fiscal Year ending December 31, 2001.
 
     "TERMINATION OF SERVICE" means the termination of the service relationship,
whether employment or otherwise, between an Eligible Individual and the
Corporation and its Affiliates, regardless of the fact that severance or similar
payments are made to the Eligible Individual for any reason, including, but not
by way of limitation, a termination by resignation, discharge, death, Permanent
and Total Disability or retirement. The Committee shall, in its absolute
discretion, determine the effect of all matters and questions relating to
Termination of Service, including, but not by way of limitation, the question of
whether a leave of absence constitutes a Termination of Service, or whether a
Termination of Services is for Cause.
 
SECTION 2. MAXIMUM NUMBER OF SHARES SUBJECT TO AND AMOUNT OF CASH PAYMENTS
           AVAILABLE UNDER THE PLAN.
 
     2.1 Description of Stock and Maximum Shares Allocated. The Stock which
Options granted hereunder give an Eligible Individual the right to purchase may
be unissued or reacquired shares of Stock, as the Board of Directors may, in its
sole and absolute discretion, from time to time determine. Subject to the
adjustments provided for in Section 6.9 hereof, the aggregate number of shares
of Stock available for issuance pursuant to the exercise of all Options granted
hereunder shall be $3,375,000 divided by the Closing Sales Price (the "Aggregate
Option Shares"). The Options granted to each Eligible Individual pursuant to
this Plan shall vest in accordance with the provisions of paragraph (a) of
Section 6.2 hereof.
 
     2.2 Maximum Amount of Cash Payments. The aggregate amount of funds
available for Cash Payments to all Eligible Individuals pursuant to the Plan
shall be $3,375,000. The aggregate amount of Cash Payments (the "Annual Payment
Award") to be made to Eligible Individuals with respect to a Fiscal Year shall
be an amount equal to the product of (i) the Aggregate Payment Amount with
respect to such Fiscal Year, times (ii) the Applicable Percentage with respect
to such Fiscal Year. Notwithstanding anything contained herein to the contrary,
no Cash Payment shall be made in a Fiscal Year under this Plan if the Attained
Percentage for that Fiscal Year is less than eighty percent (80%). With respect
to a Fiscal Year, any portion of the Aggregate Payment Amount attributable to
such Fiscal Year which shall not have been delivered as Cash Payments pursuant
to this Plan with respect to such Fiscal Year shall cease to be available for
Cash Payments under this Plan.
 
SECTION 3. ADMINISTRATION OF THIS PLAN.
 
     3.1 Committee. The Plan shall be administered by the Committee. The
Committee shall consist of such number of directors of the Corporation as shall
be determined by the Board of Directors, and may be constituted by all members
of the Board of Directors.
 
     3.2 Duration, Removal, Etc. The members of the Committee shall serve at the
pleasure of the Board of Directors, which shall have the power, at any time and
from time to time, to remove members from the Committee or to add members
thereto. Vacancies on the Committee, however caused, shall be filled by action
of the Board of Directors.
 
                                      A-H-3
<PAGE>   191
 
     3.3 Meetings and Actions of Committee. The Committee shall elect one of its
members as its Chairman and shall hold its meetings at such times and places as
it may determine. All decisions and determinations of the Committee shall be
made by the majority vote or decision of all of its members present at a
meeting; provided, however, that any decision or determination reduced to
writing and signed by all of the members of the Committee shall be as fully
effective as if it had been made at a meeting duly called and held. The
Committee may make any rules and regulations for the conduct of its business
that are not inconsistent with the provisions hereof and with the by-laws of the
Corporation as it may deem advisable.
 
     3.4 Committee's Powers. Subject to the express provisions hereof, the
Committee shall have the authority, in its sole and absolute discretion
exercised in good faith, (a) to adopt, amend, and rescind administrative and
interpretive rules and regulations relating to this Plan; (b) to determine the
Celcore Revenues for purposes of determining the vesting of the Options and the
award of Cash Payments; (c) to determine the circumstances of any termination of
employment of an Eligible Individual for purposes of applying the provisions of
Section 6.8 hereof and the effect of approved leaves of absence; (d) to construe
the respective Agreements and this Plan; (e) to make all other determinations
and perform all other acts necessary or advisable for administering this Plan,
including the delegation of such ministerial acts and responsibilities as the
Committee deems appropriate; and (f) to correct any defect or supply any
omission or reconcile any inconsistency in this Plan or in any Agreement in the
manner and to the extent it shall deem expedient to carry it into effect,
provided that no such correction, addition, reconciliation or other amendment to
this Plan shall adversely affect the rights of any Eligible Individual.
 
SECTION 4. ELIGIBILITY AND PARTICIPATION.
 
     Options and Cash Payments shall be granted hereunder as of the Effective
Time to all persons who are Eligible Individuals and only to persons who are
Eligible Individuals, subject to the provisions of Section 6.8 hereof. In
addition, no person shall be considered an Eligible Individual and entitled to
any of the rights under the Plan unless such person has executed and delivered
to the Corporation the Employee Patent, Copyright, and Proprietary Information
Agreement, attached hereto as Exhibit B.
 
SECTION 5. GRANT OF OPTIONS AND CERTAIN TERMS OF THE AGREEMENTS.
 
     Each Option and Cash Payment granted hereunder shall be evidenced by an
Agreement, dated as of the Effective Time, executed by the Corporation and the
Eligible Individual to whom the Option and Cash Payment is granted. The
Effective Time shall be deemed to be the date on which the Option covered by an
Agreement is granted, even though the Agreement may not be executed until a
later time.
 
SECTION 6. TERMS AND CONDITIONS OF OPTIONS AND CASH PAYMENTS.
 
     All Options and Cash Payments granted hereunder shall comply with, be
deemed to include, and be subject to the following terms and conditions:
 
     6.1 Number of Shares. Each Agreement shall provide for the grant of Options
to an Eligible Individual to purchase a number of shares of Stock, subject to
the adjustments provided for in Section 6.9 hereof, equal to the product of (a)
the Aggregate Option Shares and (b) the Percentage Participation allocated to
such Eligible Individual.
 
     6.2 Vesting of Options.
 
     (a) Subject to the provisions of Section 6.8 hereof, the Options granted to
an Eligible Individual shall be eligible for vesting at the end of each of the
Fiscal Years of the Corporation ending December 31, 1998 to December 31, 2001 as
provided in this Section 6.2(a). The number of Options that shall vest (the
"Annual Option Vesting Amount") at the end of the Fiscal Years of the
Corporation ending December 31, 1998 through December 31, 2001 shall equal the
product of (i) the Aggregate Option Amount with respect to such Fiscal Year
times (ii) the Applicable Percentage with respect to such Fiscal Year.
Notwithstanding anything contained herein to the contrary, the Annual Option
Vesting Amount shall be zero in any Fiscal Year in which the Attained Percentage
for that Fiscal Year is less than eighty percent (80%). The number of Options
 
                                      A-H-4
<PAGE>   192
 
granted to an Eligible Individual that shall vest with respect to each Fiscal
Year of the Corporation ending December 31, 1998 through December 31, 2001 shall
be an amount equal to the Percentage Participation of such Eligible Individual
with respect to that Fiscal Year times the Annual Option Vesting Amount, if any,
for that Fiscal Year. If the number of Options that would vest according to the
immediately preceding sentence exceeds the number of Options granted to an
Eligible Individual which have not yet vested, then only those Options that have
not yet vested shall vest according to this Section 6.2(a). All Options that
have not vested with respect to the Fiscal Years ending December 31, 1998
through December 31, 2001 in accordance with this Section 6.2(a) shall vest on
December 31, 2002.
 
     (b) An Eligible Individual may not purchase the shares of Stock subject to
an Option until such time as that portion of the Option has vested pursuant to
this Section 6.2. Notwithstanding any other provision of this Plan, including
the provisions of Section 6.8 hereof, no Option shall be exercisable after the
fifth anniversary of the vesting date of such Option.
 
     6.3  Exercise Price of Options. The exercise price per share of Stock
subject to an Option shall be the Closing Sales Price.
 
     6.4  Cash Payments. Each Agreement shall provide for the grant of the right
to Cash Payments to an Eligible Individual with respect to each Fiscal Year of
the Corporation ending December 31, 1998 and December 31, 1999 in an amount
equal to the Percentage Participation of such Eligible Individual with respect
to that Fiscal Year times the Annual Payment Award, if any, for that Fiscal
Year. Each Cash Payment under this Section 6.4 shall be deemed payable as of
December 31 in respect of each Fiscal Year and the delivery of any Cash Payment
with respect to a Fiscal Year shall be made by the Corporation not later than 75
days after the end of such Fiscal Year. The Corporation may, in its discretion,
withhold from the amount of any Cash Payment delivered to an Eligible Individual
the portion thereof that it deems necessary to satisfy its obligation to
withhold Federal, state or local income or other taxes incurred by reason of
such Cash Payment.
 
     6.5  Determination of Celcore Revenues. For purposes of determining the
Annual Option Vesting Amount with respect to a Fiscal Year and the Annual
Payment Award with respect to a Fiscal Year, within 60 days after the end of
each Fiscal Year of the Corporation (i) from December 31, 1998 to December 31,
2001 with respect to the Annual Option Vesting Amount and (ii) December 31, 1998
and December 31, 1999 with respect to the Annual Payment Award, the Corporation
shall furnish the Committee with such financial information as it shall require
in order to determine the Celcore Revenues with respect to that Fiscal Year, and
the Committee shall make such determination in good faith as soon as possible
after the receipt of such information, which determination shall be final and
binding on all Eligible Individuals. Within 75 days after the end of each Fiscal
Year of the Corporation ending December 31, 1998 to December 31, 2001, the
Committee shall notify each Eligible Individual with respect to whom an Option
is eligible for vesting for that Fiscal Year of the determination of the Celcore
Revenues for that Fiscal Year and the number of shares of Stock subject to such
Eligible Individual's Option which has vested with respect to that Fiscal Year,
together with delivery of the Cash Payment, if any, with respect to that Fiscal
Year.
 
     6.6  Medium and Time of Payment, Method of Exercise, and Withholding Taxes.
The exercise price of an Option shall be payable upon the exercise of the Option
in cash or by check payable to the order of the Corporation. Exercise of an
Option shall not be effective until the Corporation has received written notice
of exercise. Such notice must specify the number of whole shares of Stock to be
purchased and be accompanied by payment in full of the aggregate exercise price
of the number of shares purchased. The Corporation shall not in any case be
required to sell, issue, or deliver a fractional share with respect to any
Option.
 
     The Committee may, in its discretion, require an Eligible Individual to pay
to the Corporation at the time of exercise of an Option or portion thereof the
amount that the Corporation deems necessary to satisfy its obligation to
withhold Federal, state or local income or other taxes incurred by reason of the
exercise.
 
     6.7  Term, Time of Exercise, and Transferability of Options. In addition to
such other terms and conditions as may be included in a particular Agreement
granting an Option, during the term of an Option such Option shall be
exercisable during an Eligible Individual's lifetime only by him or by his
guardian or legal representative. An Option shall not be transferable other than
by will or the laws of descent and distribution.
 
                                      A-H-5
<PAGE>   193
 
No Option shall be deemed to satisfy the provisions of Section 422A of the Code.
As soon as reasonably practicable after the Corporation receives written notice
that the Eligible Individual has elected to exercise all or a portion of an
Option which has vested pursuant to the Plan, such notice to be accompanied by
payment in full of the aggregate Option price of the number of shares purchased,
the Corporation shall issue and deliver a certificate representing the shares
acquired in consequence of the exercise and any other amounts payable in
consequence of such exercise.
 
     Nothing herein or in any Option granted hereunder shall require the
Corporation to issue any shares upon exercise of any Option if such issuance
would, in the opinion of counsel for the Corporation, constitute a violation of
the Securities Act or any similar or superseding statute or statutes, any
applicable blue sky or state securities laws or any other applicable statute or
regulation, as then in effect. The Corporation shall file or cause to be filed
with the Securities and Exchange Commission at least twenty days prior to the
date of the notification to Eligible Individuals of that portion of the Options
which has vested with respect to the Fiscal Year ended December 31, 1998, a
Registration Statement on Form S-8 registering under the Securities Act the
Stock issuable upon exercise of the Options, and shall keep such Registration
Statement effective for so long as Options remain outstanding and exercisable
under this Plan or, if shorter, so long as such Form S-8, or any successor form,
remains available to the Corporation for registration of such Stock. At the time
of any exercise of an Option, in the event such Registration Statement on Form
S-8 or successor form is not effective, the Corporation may, as a condition
precedent to the exercise of such Option, require from the Eligible Individual
exercising such Option (or in the event of his death, his legal representatives,
heirs, legatees, or distributees) such written representations, if any,
concerning his intentions with regard to the retention or disposition of the
shares being acquired by exercise of such Option and such written covenants and
agreements, if any, as to the manner of disposal of such shares as, in the
opinion of counsel to the Corporation, may be necessary to ensure that any
disposition by such Eligible Individual (or in the event of his death, his legal
representatives, heirs, legatees, or distributees), will not involve a violation
of the Securities Act or any similar or superseding statute or statutes, or any
other applicable state or federal statute or regulation, as then in effect.
 
     6.8  Termination of Employment, Death or Disability.
 
     (a) If an Eligible Individual ceases to be employed by at least one of the
employers in the group of employers consisting of the Corporation and its
Affiliates because the Eligible Individual voluntarily terminates employment
with such group of employers, (i) the portion, if any, of an Option that has not
yet vested under the terms of the Plan, on the date of the Eligible Individual's
Termination of Service shall terminate as of such date, (ii) the Eligible
Individual shall have the right for thirty (30) days after such Termination of
Service to exercise the portion, if any, of the Option which has vested pursuant
to the Plan as of the date of the Eligible Individual's Termination of Service,
and thereafter such Option shall terminate and cease to be exercisable, (iii)
the portion of any Option which has vested with respect to a Fiscal Year ending
prior to the date of the Eligible Individual's Termination of Service but with
respect to which the Committee has not yet determined the amount which has
vested at the date of such termination may be exercised by the Eligible
Individual within thirty (30) days after (A) the date of receipt by the Eligible
Individual of the portion of any Cash Payment which has vested with respect to
such Fiscal Year, or (B) if no Cash Payment is made with respect to such Fiscal
Year, the date of receipt by the Eligible Individual of a notice from the
Committee pursuant to Section 6.5 hereof of the number of shares of Stock
subject to such Eligible Individual's Option which has vested with respect to
that Fiscal Year, and thereafter such portion shall terminate and cease to be
exercisable, and (iv) the portion of any Cash Payment granted to the Eligible
Individual which is payable with respect to a Fiscal Year ending prior to the
date of the Eligible Individual's Termination of Service shall be paid to such
Eligible Individual at the time provided for in this Plan, and no other Cash
Payment shall be required to be paid by the Corporation in connection with this
Plan. Notwithstanding the foregoing, if an Eligible Individual ceases to be
employed during the Fiscal Year because the Eligible Individual voluntarily
terminates employment as provided in this Section 6.8(a), no Cash Payment for
such Fiscal Year shall be payable to the Eligible Individual and no Options
shall vest in respect of such Fiscal Year.
 
                                      A-H-6
<PAGE>   194
 
     (b) If an Eligible Individual ceases to be employed by at least one of the
employers in the group of employers consisting of the Corporation and its
Affiliates because any of such entities terminates the Eligible Individual's
employment for Cause, (i) the portion, if any, of an Option that remains
unexercised, including that portion, if any, that has vested under the terms of
the Plan, on the date of the Eligible Individual's Termination of Service, shall
terminate and cease to be exercisable as of such date, and (ii) the right of
such Eligible Individual to any Cash Payment which has not been paid prior to
the date of the Eligible Individual's Termination of Service shall be
terminated.
 
     (c) If an Eligible Individual ceases to be employed by at least one of the
employers in the group of employers consisting of the Corporation and its
Affiliates because one or more of such entities terminates the employment of the
Eligible Individual but not for Cause, (i) subject to Section 6.8(f) below, the
portion, if any, of an Option that has not yet vested under the terms of the
Plan, on the date of the Eligible Individual's Termination of Service shall
terminate as of such date, (ii) subject to Section 6.8(f) below, such Eligible
Individual shall be entitled to exercise the Option to the extent that such
Eligible Individual was entitled to exercise it on such date, but only until the
earlier of the date (A) the Option held by such Eligible Individual expires, or
(B) six (6) months after the date of the Termination of Services of such
Eligible Individual, and (iii) subject to Section 6.8(f) below, such Eligible
Individual shall receive a Cash Payment pursuant to Section 2.2 hereof.
 
     (d) Notwithstanding the provisions of Sections 6.8(a), (b) and (c) above,
if an Eligible Individual ceases to be employed by at least one of the employers
in the group of employers consisting of the Corporation and its Affiliates by
reason of Permanent and Total Disability, (i) subject to Section 6.8(f) below,
the portion, if any, of an Option that has not yet vested under the terms of the
Plan on the date of the Eligible Individual's Termination of Service due to such
Permanent and Total Disability shall terminate as of such date, (ii) subject to
Section 6.8(f) below, notwithstanding such Termination of Service, such Eligible
Individual may exercise an Option in whole or in part to the extent such Option
was exercisable on the date of Termination of Service of such Eligible
Individual due to such Permanent and Total Disability, but only until the
earlier of the date (A) the Option held by the Eligible Individual expires, or
(B) twelve (12) months from the date of Termination of Service of such Eligible
Individual due to such Permanent and Total Disability, and (ii) subject to
Section 6.8(f) below, such Eligible Individual shall be eligible to receive a
Cash Payment pursuant to Section 2.2 hereof.
 
     (e) Upon the death of an Eligible Individual, (i) any Option held by an
Eligible Individual shall terminate and be of no further effect; provided,
however, notwithstanding the provisions of Sections 6.8(a), (b) and (c) above
and subject to Section 6.8(f) below, if an Eligible Individual dies while in the
employ of the Corporation or an Affiliate, such legal representatives, heirs,
legatees, or distributees shall have the right to exercise such Options in
accordance with this Plan and such Eligible Individual's Agreement to the extent
such Options had vested at the time of such Eligible Individual's death, but
only until the earlier of the date (A) the Option held by the Eligible
Individual expires, or (B) twelve (12) months from the date of the Eligible
Individual's death, and (ii) subject to Section 6.8(f) below, the Eligible
Individual's legal representatives, heirs, legatees, or distributees shall be
eligible to receive a Cash Payment pursuant to Section 2.2 hereof.
 
     (f) Unless otherwise determined by the Committee or required by applicable
law, in the event during the Fiscal Year an Eligible Individual ceases to be
employed by at least one of the employers in the group of employers consisting
of the Corporation and its Affiliates because one or more of such entities
terminates the employment of such Eligible Individual but not for Cause, or by
reason of death or Permanent and Total Disability of such Eligible Individual
that occurs:
 
          (i) if such Eligible Individual is otherwise entitled to receive a
     Cash Payment under Section 2.2 hereof for such Fiscal Year but for the fact
     the Eligible Individual is no longer employed, the Eligible Individual (or
     the Eligible Individual's legal representative or beneficiary) shall
     receive a Cash Payment equal to the product of (i) the Cash Payment he/she
     would have received for such entire Fiscal Year, multiplied by (ii) a
     fraction, the numerator of which is the number of days during such Fiscal
     Year in
 
                                      A-H-7
<PAGE>   195
 
     which the Eligible Individual was an employee of the Corporation or its
     Affiliates, and the denominator of which is the number of days in such
     Fiscal Year; and
 
          (ii) if an Option would otherwise vest under Section 6.2 hereof, the
     Annual Option Vesting Amount allocable to such Eligible Individual based on
     his Percentage Participation shall be adjusted such that the number of
     Options granted to such Eligible Individual that shall vest with respect to
     such Fiscal Year shall be equal to the product of (i) the Annual Option
     Vesting Amount that would have been allocable to such Eligible Individual
     for such entire Fiscal Year, multiplied by (ii) a fraction, the numerator
     of which is the number of days during such Fiscal Year in which the
     Eligible Individual was an employee of the Corporation or its Affiliates,
     and the denominator of which is the number of days in such Fiscal Year.
 
     6.9  Adjustments Upon Changes in Capitalization, Merger,
Etc. Notwithstanding any other provision hereof, in the event of any change in
the number of outstanding shares of Stock effected without receipt of
consideration therefor by the Corporation, by reason of a stock dividend, or
split, combination, exchange of shares of other recapitalization, merger, or
otherwise, in which the Corporation is the surviving corporation, the aggregate
number and class of the reserved shares, the number and class of shares subject
to each outstanding Option and the exercise price of each outstanding Option
shall be automatically adjusted to accurately and equitably reflect the effect
thereon of such change, provided that any fractional share resulting from such
adjustment may be eliminated, and provided further that the exercise price of an
Option shall not be less than $.01 per share. In the event of a dispute
concerning such adjustment, the decision of the Committee made in good faith
shall be conclusive. Neither this Plan nor any Agreement shall affect the right
of the Corporation or any Affiliate thereof to reclassify, recapitalize or
otherwise change its capital or debt structure or to merge, consolidate, convey
any or all of its assets, dissolve, liquidate, wind up, or otherwise reorganize.
 
     In the event of (a) a dissolution or liquidation of the Corporation, (b) a
merger or consolidation (other than a merger effecting a reincorporation of the
Corporation in another state or other jurisdiction or any other merger or a
consolidation in which the stockholders of the surviving corporation and their
proportionate interests therein immediately after the merger or consolidation
are substantially identical to the stockholders of the Corporation and their
proportionate interests therein immediately prior to the merger or
consolidation) in which the Corporation is not the surviving corporation (or
survives only as a subsidiary of another corporation in a transaction in which
the stockholders of the parent of the Corporation and their proportionate
interests therein immediately after the transaction are not substantially
identical to the stockholders of the Corporation and their proportionate
interests therein immediately prior to the transaction; provided that the Board
of Directors may at any time prior to such merger or consolidation provide by
resolution that the foregoing provisions of this parenthetical shall not apply
if a majority of the board of directors of such parent immediately after the
transaction consists of individuals who constituted a majority of the Board of
Directors immediately prior to the transaction), or (c) a transaction in which
any person becomes the owner of 50% or more of the total combined voting power
of all classes of stock of the Corporation (provided that the Board of Directors
may at any time prior to such transaction provide by resolution that this
Subparagraph (c) shall not apply if such acquiring person is a corporation and a
majority of the board of directors of such corporation immediately after the
transaction consists of individuals who constituted a majority of the Board of
Directors immediately prior to the acquisition of such 50% or more total
combined voting power), every Option then outstanding shall terminate, but the
holders of each such then outstanding Option shall, in any event, have the
right, immediately prior to such dissolution, liquidation, merger,
consolidation, or transaction, to exercise such Options, to the extent not
theretofore exercised, without regard to the vesting provisions of Section 6.2
hereof if (and only if) such Options have not at that time expired or been
terminated pursuant to Section 6.8 hereof. Such acceleration of exercisability
shall not apply to a given Option if any surviving or acquiring corporation
agrees to assume such Option in connection with the merger, consolidation, or
transaction, in which event such Options will continue to be subject to the
vesting provisions of Section 6.2 hereof.
 
     6.10  Rights as a Stockholder. An Eligible Individual shall have no right
as a stockholder with respect to any shares covered by his Option until a
certificate representing such shares is issued to him. No adjustment shall be
made for dividends (ordinary or extraordinary, whether in cash or other
property) or distributions or
 
                                      A-H-8
<PAGE>   196
 
other rights for which the record date is prior to the date such certificate is
issued, except as provided in Section 6.9 hereof.
 
     6.11  Furnish Information. Each Eligible Individual shall furnish to the
Corporation all information requested by the Corporation to enable it to comply
with any reporting or other requirement imposed upon the Corporation by or under
any applicable statute or regulation.
 
     6.12  Obligation to Exercise. The granting of an Option hereunder shall
impose no obligation upon the Eligible Individual to exercise the same or any
part thereof.
 
SECTION 7. GENERAL.
 
     7.1  Application of Funds; Issuance of Shares. The proceeds received by the
Corporation from the sale of shares pursuant to Options shall be used for
general corporate purposes. When issued upon exercise of Options in accordance
with the terms of this Plan, all shares of Stock will be duly authorized,
validly issued, fully paid and nonassessable.
 
     7.2  Right of the Corporation and Affiliates to Terminate
Employment. Nothing contained in this Plan, or in any Agreement, shall confer
upon any Eligible Individual the right to continue in the employ of the
Corporation or any Affiliate, or interfere in any way with the rights of the
Corporation or any Affiliate to terminate or modify in any way the terms,
including but not limited to the compensation and responsibilities, of the
Eligible Individual's employment at any time. Nothing contained herein shall be
deemed to require any action on the part of the Committee or the Board of
Directors of the Corporation or any Affiliate in connection with the termination
of employment of an Eligible Individual.
 
     7.3  No Liability for Good Faith Determinations. Neither the members of the
Board of Directors nor any member of the Committee shall be liable for any act,
omission, or determination taken or made in good faith with respect to this Plan
or any Option or right to Cash Payment granted under it, and members of the
Board of Directors and the Committee shall be entitled to indemnification and
reimbursement by the Corporation in respect of any claim, loss, damage, or
expense (including attorneys' fees, the costs of settling any suit, provided
such settlement is approved by independent legal counsel selected by the
Corporation, and amounts paid in satisfaction of a judgment, except a judgment
based on a finding of bad faith) arising therefrom to the full extent permitted
by law and under any directors and officers liability or similar insurance
coverage that may from time to time be in effect.
 
     7.4  Other Benefits. Participation in the Plan shall not preclude the
Eligible Individual from eligibility in any other stock option plan of the
Corporation or any Affiliate or any old age benefit, insurance, pension, profit
sharing retirement, bonus, or other extra compensation plans which the
Corporation or any Affiliate has adopted, or may, at any time, adopt for the
benefit of its employees.
 
     7.5  Execution of Receipts and Releases. Any payment of cash or any
issuance or transfer of shares of Stock to the Eligible Individual, or to his
legal representatives, heir, legatee, or distributee, in accordance with the
provisions hereof, shall, to the extent thereof, be in full satisfaction of all
claims of such persons with respect to such payment, issuance or transfer
hereunder. The Committee may require any Eligible Individual, legal
representative, heir, legatee, or distributee, as a condition precedent to such
payment, to execute a release and receipt therefor in such form as it shall
determine.
 
     7.6  No Guarantee of Interests. Neither the Committee nor the Corporation
guarantees the Stock of the Corporation from loss or depreciation.
 
     7.7  Severability. If any provision of this Plan is held to be illegal or
invalid for any reason, the illegality or invalidity shall not affect the
remaining provisions hereof, but such provision shall be fully severable and
this Plan shall be construed and enforced as if the illegal or invalid provision
had never been included herein.
 
     7.8  Notices. Whenever any notice is required or permitted hereunder, such
notice must be in writing and personally delivered or sent by mail. Any notice
required or permitted to be delivered hereunder shall be deemed to be delivered
on the date on which it is personally delivered, or, whether actually received
or not on the third business day after it is deposited in the United States
mail, certified or registered, postage prepaid,
 
                                      A-H-9
<PAGE>   197
 
addressed to the person who is to receive it at the address which such person
has theretofore specified by written notice delivered in accordance herewith.
The Corporation or an Eligible Individual may change, at any time and from time
to time, by written notice to the other, the address which it or he/she had
previously specified for receiving notices. Until changed in accordance
herewith, the Corporation and each Eligible Individual shall specify as his
address for receiving notices, the address set forth in the Agreement pertaining
to the Option or Cash Payment to which such notice relates.
 
     7.9  Waiver of Notice. Any person entitled to notice hereunder may waive
such notice.
 
     7.10  Headlines. The title and headings of Sections are included for
convenience of reference only and are not to be considered in construction of
the provisions hereof.
 
     7.11  Governing Law. All questions arising with respect to the provisions
of the Plan and each Agreement shall be determined by application of the laws of
the State of Texas except to the extent Texas law is preempted by federal law.
The obligation of the Corporation to sell and deliver Stock hereunder is subject
to applicable laws and to the approval of any governmental authority required in
connection with the authorization, issuance, sale, or delivery of such Stock.
 
     7.12  Word Usage. Words used in the masculine shall apply to           ,
the feminine where applicable, and wherever the context of this Plan dictates,
the plural shall be read as the singular and the singular as the plural.
 
     7.13  Fiscal Year. Nothing contained in this Plan or any Agreement shall be
deemed to restrict or prohibit the Corporation from changing its Fiscal Year,
provided that in the event the Corporation changes its Fiscal Year appropriate
adjustments shall be made with respect to the vesting schedule for the Options
and the Cash Payments to avoid any impairment of benefits hereunder caused by
such change in Fiscal Year.
 
     7.14  Other Agreements. Notwithstanding any provision in the Plan to the
contrary, the right of an Eligible Individual to receive, or obtain the benefits
after the receipt of, Cash Payments and Options pursuant to the Plan is subject
to the rights and remedies of the Corporation pursuant to the Employee Patent,
Copyright, and Proprietary Information Agreement with such Eligible Individual.
 
     IN WITNESS WHEREOF, DSC Communications Corporation, acting by and through
its officers hereunto duly authorized has executed this instrument, this
day of             , 1997.
 
                                            DSC COMMUNICATIONS CORPORATION
 
                                            By:
                                            ------------------------------------
 
                                            Name:
                                            ------------------------------------
 
                                            Title:
                                            ------------------------------------
 
                                     A-H-10
<PAGE>   198
 
                                   APPENDIX B
 
                                FAIRNESS OPINION
 
                                       B-1
<PAGE>   199
 
                                October 29, 1997
Board of Directors
Celcore, Inc.
3800 Forrest Hill-Irene Road
Memphis, TN 38125
 
Dear Sirs:
 
     You have requested our opinion as to the fairness from a financial point of
view to the holders of $0.10 par value common stock ("Company Common Stock") of
Celcore, Inc. (the "Company"); the Series A Convertible Preferred Stock, par
value $0.10; the Series B Convertible Preferred Stock, par value $0.10; the
Series C Convertible Preferred Stock, par value $0.10; and the Series D
Convertible Preferred Stock, par value $0.10; (collectively the "Preferred
Stock" and, together with the Company Common Stock, the "Company Capital
Stock"), in the aggregate, of the Exchange Ratio (as defined below) pursuant to
the terms of the Agreement and Plan of Merger, dated as of October 29, 1997 (the
"Agreement"), by and among DSC Communications Corporation ("Purchaser"), CI
Acquisition Company ("Merger Sub"), a wholly-owned subsidiary of Purchaser, and
the Company, pursuant to which Merger Sub will be merged (the "Merger") with and
into the Company.
 
     Pursuant to the Agreement, each share of Company Common Stock and Preferred
Stock shall be converted, subject to certain exceptions, into the right to
receive that number of shares of common stock, par value $0.01 per share, of
Purchaser equal to: (i) a fraction, the numerator of which is eight (8) and the
denominator of which is the Average Trading Price (as defined below) of
Purchaser Common Stock; or (ii) in the event the Average Trading Price is
twenty-five dollars ($25.00) or less, 0.32 (such number determined pursuant to
clauses (i) and (ii), the "Exchange Ratio"). The term Average Trading Price
means the average reported last sales price of a share of Purchaser Common Stock
on the NASDAQ National Market ("NASDAQ") as reported by NASDAQ for the 10
consecutive trading days ending immediately preceding the second day before the
meeting of Celcore's stockholders called for the purpose of voting on the
Merger.
 
     In arriving at our opinion, we have reviewed the Agreement. We also have
reviewed financial and other information that was publicly available or
furnished to us by the Company including information provided during discussions
with management. Included in the information provided during discussions with
management was certain financial projections of the Company for the period
beginning July 1, 1997 and ending December 31, 1998 prepared by the management
of the Company. In addition, we have compared certain financial data of the
Company with various other companies whose securities are traded in public
markets, reviewed prices and premiums paid in certain other business
combinations and conducted such other financial studies, analyses and
investigations as we deemed appropriate for purposes of this opinion. We were
not requested to, nor did we, solicit the interest of any other party in
acquiring the Company.
 
     In rendering our opinion, we have relied upon and assumed the accuracy and
completeness of all of the financial and other information that was available to
us from public sources, that was provided to us by the Company or its
representatives, or that was otherwise reviewed by us. With respect to the
financial projections supplied to us, we have assumed that they have been
reasonably prepared on a basis reflecting the best currently available estimates
and judgments of the management of the Company as to the future operating and
financial performance of the Company. We also assumed that each share of
Preferred Stock will be converted into Company Common Stock prior to
consummation of the Merger. We have not assumed any responsibility for making an
independent evaluation of the Company's assets or liabilities or for making any
independent verification of any of the information reviewed by us. We have
relied as to certain legal matters on advice of counsel to the Company.
 
     Our opinion is necessarily based on economic, market, financial and other
conditions as they exist on, and on the information made available to us as of,
the date of this letter. It should be understood that, although subsequent
developments may affect this opinion, we do not have any obligation to update,
revise or reaffirm
 
                                       B-2
<PAGE>   200
 
this opinion. We are expressing no opinion herein as to the price at which
Purchaser Common Stock will actually trade at any time. Our opinion does not
address the relative merits of the Merger and any other business strategies
being considered by the Company's Board of Directors, nor does it address the
Board's decision to proceed with the Merger. Our opinion does not constitute a
recommendation to any stockholder as to how such stockholder should vote on the
proposed Merger.
 
     Donaldson, Lufkin & Jenrette Securities Corporation ("DLJ"), as part of its
investment banking services, is regularly engaged in the valuation of businesses
and securities in connection with mergers, acquisitions, underwritings, sales
and distributions of listed and unlisted securities, private placements and
valuations for estate, corporate and other purposes. DLJ has performed
investment banking and other services for the Company in the past including
review of financing alternatives in 1997.
 
     Based upon the foregoing and such other factors as we deem relevant, we are
of the opinion that the Exchange Ratio is fair to the holders of Company Capital
Stock in the aggregate, from a financial point of view.
 
                                            Very truly yours,
 
                                            DONALDSON, LUFKIN & JENRETTE
                                              SECURITIES CORPORATION
 
                                            By:     /s/ ERIK M. JENSEN
                                              ----------------------------------
                                                        Erik M. Jensen
                                                    Senior Vice President
 
                                       B-3
<PAGE>   201
 
                                   APPENDIX C
 
                                  SECTION 262
                        DELAWARE GENERAL CORPORATION LAW
                                APPRAISAL RIGHTS
 
                                       C-1
<PAGE>   202
 
SECTION 262. APPRAISAL RIGHTS
 
     (a) Any stockholder of a corporation of this State who holds shares of
stock on the date of the making of a demand pursuant to subsection (d) of this
section with respect to such shares, who continuously holds such shares through
the effective date of the merger or consolidation, who has otherwise complied
with subsection (d) of this section and who has neither voted in favor of the
merger or consolidation nor consented thereto in writing pursuant to Section 228
of this title shall be entitled to an appraisal by the Court of Chancery of the
fair value of the stockholder's shares of stock under the circumstances
described in subsections (b) and (c) of this section. As used in this section,
the word "stockholder" means a holder of record of stock in a stock corporation
and also a member of record of a nonstock corporation; the words "stock" and
"share" mean and include what is ordinarily meant by those words and also
membership or membership interest of a member of a nonstock corporation; and the
words "depository receipt" mean a receipt or other instrument issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.
 
     (b) Appraisal rights shall be available for the shares of any class or
series of stock of a constituent corporation in a merger or consolidation to be
effected pursuant to Section 251 (other than a merger effected pursuant to
Section 251(g) of this title), Section 252, Section 254, Section 257, Section
258, Section 263 or Section 264 of this title:
 
          (1) Provided, however, that no appraisal rights under this section
     shall be available for the shares of any class or series of stock, which
     stock, or depository receipts in respect thereof, at the record date fixed
     to determine the stockholders entitled to receive notice of and to vote at
     the meeting of stockholders to act upon the agreement of merger or
     consolidation, were either (i) listed on a national securities exchange or
     designated as a national market system security on an interdealer quotation
     system by the National Association of Securities Dealers, Inc. or (ii) held
     of record by more than 2,000 holders; and further provided that no
     appraisal rights shall be available for any shares of stock of the
     constituent corporation surviving a merger if the merger did not require
     for its approval the vote of the stockholders of the surviving corporation
     as provided in subsection (f) of Section 251 of this title.
 
          (2) Notwithstanding paragraph (1) of this subsection, appraisal rights
     under this section shall be available for the shares of any class or series
     of stock of a constituent corporation if the holders thereof are required
     by the terms of an agreement of merger or consolidation pursuant to
     Sections 251, 252, 254, 257, 258, 263 and 264 of this title to accept for
     such stock anything except:
 
             a. Shares of stock of the corporation surviving or resulting from
        such merger or consolidation, or depository receipts in respect thereof;
 
             b. Shares of stock of any other corporation, or depository receipts
        in respect thereof, which shares of stock (or depository receipts in
        respect thereof) or depository receipts at the effective date of the
        merger or consolidation will be either listed on a national securities
        exchange or designated as a national market system security on an
        interdealer quotation system by the National Association of Securities
        Dealers, Inc. or held of record by more than 2,000 holders;
 
             c. Cash in lieu of fractional shares or fractional depository
        receipts described in the foregoing subparagraphs a. and b. of this
        paragraph; or
 
             d. Any combination of the shares of stock, depository receipts and
        cash in lieu of fractional shares or fractional depository receipts
        described in the foregoing subparagraphs a., b. and c. of this
        paragraph.
 
          (3) In the event all of the stock of a subsidiary Delaware corporation
     party to a merger effected under Section 253 of this title is not owned by
     the parent corporation immediately prior to the merger, appraisal rights
     shall be available for the shares of the subsidiary Delaware corporation.
 
     (c) Any corporation may provide in its certificate of incorporation that
appraisal rights under this section shall be available for the shares of any
class or series of its stock as a result of an amendment to its certificate of
incorporation, any merger or consolidation in which the corporation is a
constituent corporation or the sale
 
                                       C-2
<PAGE>   203
 
of all or substantially all of the assets of the corporation. If the certificate
of incorporation contains such a provision, the procedures of this section,
including those set forth in subsections (d) and (e) of this section, shall
apply as nearly as is practicable.
 
     (d) Appraisal rights shall be perfected as follows:
 
          (1) If a proposed merger or consolidation for which appraisal rights
     are provided under this section is to be submitted for approval at a
     meeting of stockholders, the corporation, not less than 20 days prior to
     the meeting, shall notify each of its stockholders who was such on the
     record date for such meeting with respect to shares for which appraisal
     rights are available pursuant to subsection (b) or (c) hereof that
     appraisal rights are available for any or all of the shares of the
     constituent corporations, and shall include in such notice a copy of this
     section. Each stockholder electing to demand the appraisal of his shares
     shall deliver to the corporation, before the taking of the vote on the
     merger or consolidation, a written demand for appraisal of his shares. Such
     demand will be sufficient if it reasonably informs the corporation of the
     identity of the stockholder and that the stockholder intends thereby to
     demand the appraisal of his shares. A proxy or vote against the merger or
     consolidation shall not constitute such a demand. A stockholder electing to
     take such action must do so by a separate written demand as herein
     provided. Within 10 days after the effective date of such merger or
     consolidation, the surviving or resulting corporation shall notify each
     stockholder of each constituent corporation who has complied with this
     subsection and has not voted in favor of or consented to the merger or
     consolidation of the date that the merger or consolidation has become
     effective; or
 
          (2) If the merger or consolidation was approved pursuant to Section
     228 or Section 253 of this title, each constituent corporation, either
     before the effective date of the merger or consolidation or within ten days
     thereafter, shall notify each of the holders of any class or series of
     stock of such constituent corporation who are entitled to appraisal rights
     of the approval of the merger or consolidation and that appraisal rights
     are available for any or all shares of such class or series of stock of
     such constituent corporation, and shall include in such notice a copy of
     this section; provided that, if the notice is given on or after the
     effective date of the merger or consolidation, such notice shall be given
     by the surviving or resulting corporation to all such holders of any class
     or series of stock of a constituent corporation that are entitled to
     appraisal rights. Such notice may, and, if given on or after the effective
     date of the merger or consolidation, shall, also notify such stockholders
     of the effective date of the merger or consolidation. Any stockholder
     entitled to appraisal rights may, within 20 days after the date of mailing
     of such notice, demand in writing from the surviving or resulting
     corporation the appraisal of such holder's shares. Such demand will be
     sufficient if it reasonably informs the corporation of the identity of the
     stockholder and that the stockholder intends thereby to demand the
     appraisal of such holder's shares. If such notice did not notify
     stockholders of the effective date of the merger or consolidation, either
     (i) each such constituent corporation shall send a second notice before the
     effective date of the merger or consolidation notifying each of the holders
     of any class or series of stock of such constituent corporation that are
     entitled to appraisal rights of the effective date of the merger or
     consolidation or (ii) the surviving or resulting corporation shall send
     such a second notice to all such holders on or within 10 days after such
     effective date; provided, however, that if such second notice is sent more
     than 20 days following the sending of the first notice, such second notice
     need only be sent to each stockholder who is entitled to appraisal rights
     and who has demanded appraisal of such holder's shares in accordance with
     this subsection. An affidavit of the secretary or assistant secretary or of
     the transfer agent of the corporation that is required to give either
     notice that such notice has been given shall, in the absence of fraud, be
     prima facie evidence of the facts stated therein. For purposes of
     determining the stockholders entitled to receive either notice, each
     constituent corporation may fix, in advance, a record date that shall be
     not more than 10 days prior to the date the notice is given, provided, that
     if the notice is given on or after the effective date of the merger or
     consolidation, the record date shall be such effective date. If no record
     date is fixed and the notice is given prior to the effective date, the
     record date shall be the close of business on the day next preceding the
     day on which the notice is given.
 
     (e) Within 120 days after the effective date of the merger or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with subsections (a) and (d) hereof and who is otherwise
 
                                       C-3
<PAGE>   204
 
entitled to appraisal rights, may file a petition in the Court of Chancery
demanding a determination of the value of the stock of all such stockholders.
Notwithstanding the foregoing, at any time within 60 days after the effective
date of the merger or consolidation, any stockholder shall have the right to
withdraw his demand for appraisal and to accept the terms offered upon the
merger or consolidation. Within 120 days after the effective date of the merger
or consolidation, any stockholder who has complied with the requirements of
subsections (a) and (d) hereof, upon written request, shall be entitled to
receive from the corporation surviving the merger or resulting from the
consolidation a statement setting forth the aggregate number of shares not voted
in favor of the merger or consolidation and with respect to which demands for
appraisal have been received and the aggregate number of holders of such shares.
Such written statement shall be mailed to the stockholder within 10 days after
his written request for such a statement is received by the surviving or
resulting corporation or within 10 days after expiration of the period for
delivery of demands for appraisal under subsection (d) hereof, whichever is
later.
 
     (f) Upon the filing of any such petition by a stockholder, service of a
copy thereof shall be made upon the surviving or resulting corporation, which
shall within 20 days after such service file in the office of the Register in
Chancery in which the petition was filed a duly verified list containing the
names and addresses of all stockholders who have demanded payment for their
shares and with whom agreements as to the value of their shares have not been
reached by the surviving or resulting corporation. If the petition shall be
filed by the surviving or resulting corporation, the petition shall be
accompanied by such a duly verified list. The Register in Chancery, if so
ordered by the Court, shall give notice of the time and place fixed for the
hearing of such petition by registered or certified mail to the surviving or
resulting corporation and to the stockholders shown on the list at the addresses
therein stated. Such notice shall also be given by 1 or more publications at
least 1 week before the day of the hearing, in a newspaper of general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems advisable. The forms of the notices by mail and by publication
shall be approved by the Court, and the costs thereof shall be borne by the
surviving or resulting corporation.
 
     (g) At the hearing on such petition, the Court shall determine the
stockholders who have complied with this section and who have become entitled to
appraisal rights. The Court may require the stockholders who have demanded an
appraisal for their shares and who hold stock represented by certificates to
submit their certificates of stock to the Register in Chancery for notation
thereon of the pendency of the appraisal proceedings; and if any stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.
 
     (h) After determining the stockholders entitled to an appraisal, the Court
shall appraise the shares, determining their fair value exclusive of any element
of value arising from the accomplishment or expectation of the merger or
consolidation, together with a fair rate of interest, if any, to be paid upon
the amount determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors, including the rate of
interest which the surviving or resulting corporation would have had to pay to
borrow money during the pendency of the proceeding. Upon application by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion, permit discovery
or other pretrial proceedings and may proceed to trial upon the appraisal prior
to the final determination of the stockholder entitled to an appraisal. Any
stockholder whose name appears on the list filed by the surviving or resulting
corporation pursuant to subsection (f) of this section and who has submitted his
certificates of stock to the Register in Chancery, if such is required, may
participate fully in all proceedings until it is finally determined that he is
not entitled to appraisal rights under this section.
 
     (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto. Interest may be simple or compound, as the Court
may direct. Payment shall be so made to each such stockholder, in the case of
holders of uncertificated stock forthwith, and the case of holders of shares
represented by certificates upon the surrender to the corporation of the
certificates representing such stock. The Court's decree may be enforced as
other decrees in the Court of Chancery may be enforced, whether such surviving
or resulting corporation be a corporation of this State or of any state.
 
                                       C-4
<PAGE>   205
 
     (j) The costs of the proceeding may be determined by the Court and taxed
upon the parties as the Court deems equitable in the circumstances. Upon
application of a stockholder, the Court may order all or a portion of the
expenses incurred by any stockholder in connection with the appraisal
proceeding, including, without limitation, reasonable attorney's fees and the
fees and expenses of experts, to be charged pro rata against the value of all
the shares entitled to an appraisal.
 
     (k) From and after the effective date of the merger or consolidation, no
stockholder who has demanded his appraisal rights as provided in subsection (d)
of this section shall be entitled to vote such stock for any purpose or to
receive payment of dividends or other distributions on the stock (except
dividends or other distributions payable to stockholders of record at a date
which is prior to the effective date of the merger or consolidation); provided,
however, that if no petition for an appraisal shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to the surviving or resulting corporation a written withdrawal of his demand for
an appraisal and an acceptance of the merger or consolidation, either within 60
days after the effective date of the merger or consolidation as provided in
subsection (e) of this section or thereafter with the written approval of the
corporation, then the right of such stockholder to an appraisal shall cease.
Notwithstanding the foregoing, no appraisal proceeding in the Court of Chancery
shall be dismissed as to any stockholder without the approval of the Court, and
such approval may be conditioned upon such terms as the Court deems just.
 
     (l) The shares of the surviving or resulting corporation to which the
shares of such objecting stockholders would have been converted had they
assented to the merger or consolidation shall have the status of authorized and
unissued shares of the surviving or resulting corporation.
 
                                       C-5


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