CASCADE COMMUNICATIONS CORP
8-K, 1997-02-04
COMPUTER COMMUNICATIONS EQUIPMENT
Previous: AASTROM BIOSCIENCES INC, 424B1, 1997-02-04
Next: CASCADE COMMUNICATIONS CORP, S-3, 1997-02-04



<PAGE>   1



                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549



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

                                    FORM 8-K

                                 CURRENT REPORT


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


       Date of report (Date of earliest event reported): January 28, 1997


                          Cascade Communications Corp.
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)

<TABLE>
<S>                                               <C>                           <C>
         Delaware                                   0-24578                          4-3099677
- -------------------------------                   -----------                   -------------------
(State or Other Jurisdiction of                   (Commission                    (I.R.S. Employer
 Incorporation or Organization)                   File Number)                  Identification No.)

5 Carlisle Road
Westford, Massachusetts                                                                01886
- -------------------------------                                                      ----------
(Address of Principal Executive                                                      (Zip Code)
Offices)
</TABLE>


       Registrant's telephone number, including area code: (508) 692-2600
                                                           --------------



<PAGE>   2


                                      - 1 -

Item 2.        Acquisition or Disposition of Assets.

         On January 2, 1997 Cascade Communications Corp. ("Cascade") entered
into an Agreement and Plan of Merger and Reorganization (the "Merger Agreement")
with Camel Acquisition, Corp., a Delaware corporation and wholly owned
subsidiary of Cascade ("Merger Sub"), and Sahara Networks, Inc., a Delaware
corporation ("Sahara"). On January 28, 1997 pursuant to the Merger Agreement,
and upon the satisfaction of certain closing conditions, Merger Sub merged (the
"Merger") with and into Sahara, with Sahara as the surviving corporation and a
wholly owned subsidiary of Cascade. Cascade has agreed to file a registration
statement with the Securities and Exchange Commission to effect the registration
of the shares issued or issuable in the transaction.

         Upon the closing of the Merger, all of the issued and outstanding
shares of capital stock of Sahara were converted into shares of Cascade common
stock and all of the outstanding stock options of Sahara were thereby assumed by
Cascade. The transaction is to be accounted for as a purchase. Cascade agreed to
issue a maximum of 3,800,000 shares of common stock in the transaction
(including shares issuable upon options assumed).



<PAGE>   3
                                     - 2 -



 Item 7. Financial Statements and Exhibits.

     (a) Financial Statements of Business Acquired.
         -----------------------------------------

         The following financial statements of Sahara, together with the report
thereon manually signed by Ernst & Young LLP, appear as Exhibit 99.1 to this
Current Report on Form 8-K and are incorporated herein by this reference:

         Balance Sheets as of December 31, 1995 and September 30, 1996 
(unaudited)

         Statements of Operations for the period from May 25, 1995 (inception)
to September 30, 1995 (unaudited), for the period from May 25, 1995 (inception)
to December 31, 1995 and for the nine months ended September 30, 1996
(unaudited)

         Statements of Stockholders' Deficit for the period from May 25, 1995
(inception) to December 31, 1995 and the nine months ended September 30, 1996
(unaudited)

         Statements of Cash Flows for the period from May 25, 1995 (inception)
to September 30, 1995 (unaudited), for the period from May 25, 1995 (inception) 
to December 31, 1995 and for the nine months ended September 30, 1996 
(unaudited)

         Notes to Financial Statements

     (b) Pro Forma Financial Information.
         -------------------------------

         The following unaudited pro forma combined financial statements appear
as Exhibit 99.2 to this Current Report on Form 8-K and are incorporated herein
by this reference:

         Unaudited Pro Forma Combined Balance Sheet at September 28, 1996

         Unaudited Pro Forma Combined Statement of Operations for the nine 
months ended September 28, 1996

         Unaudited Pro Forma Combined Statement of Operations for the year 
ended December 31, 1995

         Notes to Unaudited Pro Forma Combined Financial Statements



<PAGE>   4
                                     - 3 -



         Exhibits.
         ---------

Exhibit No.        Description
- -----------        -----------

2.1                Agreement and Plan of Merger and Reorganization by and among 
                   Cascade Communications Corp., Camel Acquisition Corporation
                   and Sahara Networks, Inc. dated as of January 2, 1997.

99.1               Sahara Networks, Inc. Financial Statements.

99.2               Unaudited Pro Forma Combined Financial Statements.



<PAGE>   5
                                     - 4 -


                                   SIGNATURES


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


                                  CASCADE COMMUNICATIONS CORP.
                                  (Registrant)


Date: February 4, 1997            By: /s/ Paul E. Blondin
                                     ------------------------------------------
                                      Paul E. Blondin
                                      Vice President Finance and Administration,
                                      Chief Financial Officer





<PAGE>   6








<TABLE>
                                                   EXHIBIT INDEX
                                                   -------------
<CAPTION>


                                                                                
Exhibit No.                         Description                                 
- -----------                         -----------                                 

<S>           <C>
2.1           Agreement and Plan of Merger and Reorganization by and 
              among Cascade Communications Corp., Camel Acquisition 
              Corporation and Sahara Networks, Inc. dated as of 
              January 2, 1997.

99.1          Sahara Networks, Inc. Financial Statements.

99.2          Unaudited Pro Forma Combined Financial Statements.
</TABLE>



<PAGE>   1


                                                                     EXHIBIT 2.1







                              AGREEMENT AND PLAN OF
                            MERGER AND REORGANIZATION

                                  BY AND AMONG

                          CASCADE COMMUNICATIONS CORP.

                          CAMEL ACQUISITION CORPORATION

                                       AND

                              SAHARA NETWORKS, INC.


                           Dated as of January 2, 1997


<PAGE>   2




                                TABLE OF CONTENTS

ARTICLE I - THE MERGER.........................................................5
   1.1 The Merger..............................................................5
   1.2 Effective Time..........................................................5
   1.3 Certain Effects of the Merger...........................................5
   1.4 Certificate of Incorporation............................................5
   1.5 By-Laws.................................................................5
   1.6 Directors and Officers..................................................5
   1.7 Certain Other Agreements................................................6
ARTICLE II - CONVERSION AND EXCHANGE OF SECURITIES.............................7
   2.1 Shares of the Surviving Corporation.....................................7
   2.2 Conversion of Company Common............................................7
   2.3 Conversion of Sahara Securities.........................................7
   2.4 Exchange Agent..........................................................8
   2.5 No Fractional Cascade Common............................................8
   2.6 Distribution of Cascade Common..........................................8
   2.7 Sahara Stock Options....................................................9
   2.8 Closing of Stock Transfer Books........................................10
   2.9 Dissenting Shares......................................................10
ARTICLE III - REPRESENTATIONS AND WARRANTIES OF SAHARA........................10
   3.1 Corporate Existence and Power..........................................10
   3.2 Corporate Authorization................................................10
   3.3 Governmental Authorization.............................................11
   3.4 Non-Contravention......................................................11
   3.5 Capitalization.........................................................11
   3.6 Subsidiaries...........................................................12
   3.7 Financial Statements...................................................12
   3.8 Absence of Undisclosed Liabilities.....................................12
   3.9 Properties.............................................................12
   3.10 Real Property.........................................................13
   3.11 Condition of Tangible Assets..........................................13
   3.12 Intellectual Property.................................................13
   3.13 Absence of Certain Changes............................................15
   3.14 Litigation............................................................16
   3.15 Material Contracts....................................................16
   3.16 Taxes.................................................................18
   3.17 Employees.............................................................19
   3.18 Transactions with Affiliates..........................................20
   3.19 Insurance Coverage....................................................20
   3.20 Compliance with Laws; No Defaults.....................................20
   3.21 Finders' Fees.........................................................20
   3.22 Environmental Matters.................................................20
   3.23 Employee Plans........................................................21
   3.24 Other Information.....................................................23


                                       -i-
<PAGE>   3
                     Agreement and Plan of Merger -- Page ii


ARTICLE IV - REPRESENTATIONS AND WARRANTIES OF CASCADE AND THE COMPANY........23
   4.1 Corporate Existence and Power..........................................23
   4.2 Corporate Authorization................................................23
   4.3 Governmental Authorization.............................................23
   4.4 Non-Contravention......................................................23
   4.5 Capitalization.........................................................24
   4.6 SEC Documents..........................................................24
   4.7 Cascade Common.........................................................24
   4.8 Ownership of the Company; No Prior Activities..........................24
ARTICLE V - COVENANTS.........................................................25
   5.1 Mutual Covenants and Agreements........................................25
   5.2 Certain Covenants of Sahara............................................26
   5.3 Covenants of Cascade and the Company...................................29
   ARTICLE VI - CLOSING MATTERS...............................................30
   6.1 The Closing............................................................30
   6.2 Documents and Certificates.............................................30
ARTICLE VII - CONDITIONS OF CLOSING...........................................30
   7.1 Conditions to Obligations of Cascade, the Company and Sahara...........30
   7.2 Conditions Applicable to Cascade and the Company.......................31
   7.3 Conditions Applicable to Sahara........................................33
ARTICLE VIII - TERMINATION....................................................33
   8.1 Termination............................................................33
   8.2 Notice of Termination; Effect of Termination...........................34
   8.3 Procedure Upon Termination.............................................35
ARTICLE IX -- SURVIVAL; INDEMNIFICATION.......................................35
   9.1 Survival...............................................................35
   9.2 Indemnification........................................................35
   9.3 Third Person Claims....................................................36
   9.4 Limitations on Indemnification.........................................37
   9.5 Method of Payment......................................................37
   9.6 No Contribution........................................................37
ARTICLE X -- MISCELLANEOUS....................................................37
   10.1 Other Remedies; Specific Performance..................................37
   10.2 Expenses..............................................................37
   10.3 Further Assurances....................................................37
   10.4 Parties in Interest...................................................38
   10.5 Entire Agreement......................................................38
   10.6 Amendment or Modification.............................................38
   10.7 Waiver................................................................38
   10.8 Assignability.........................................................38
   10.9 Certain Definitions...................................................39
   10.10 Headings and Interpretation..........................................39
   10.11 Notices..............................................................39
   10.12 Law Governing........................................................40
   10.13 Invalidity of Provisions.............................................41


                                      -ii-

<PAGE>   4

                     Agreement and Plan of Merger -- Page iii


   10.14 Counterparts.........................................................41
   10.15 Consent to Jurisdiction..............................................41




                                     -iii-
<PAGE>   5





                 AGREEMENT AND PLAN OF MERGER AND REORGANIZATION


           This Agreement and Plan of Merger and Reorganization dated as of
January 2, 1997 (the "AGREEMENT") by and among Cascade Communications Corp., a
Delaware corporation ("CASCADE"), Camel Acquisition Corporation, a Delaware
corporation and a wholly-owned subsidiary of Cascade (the "COMPANY"), and Sahara
Networks, Inc., a Delaware corporation ("SAHARA"; Sahara and the Company being
hereinafter sometimes called the "Constituent Corporations"):
                                  ------------------------

                                   WITNESSETH:

           WHEREAS, the authorized capital stock of Cascade consists of (i)
2,000,000 shares of Preferred Stock, par value $.01 per share, of which no
shares are issued and outstanding, and (ii) 225,000,000 shares of Common Stock,
par value $.001 per share (the "CASCADE COMMON"), of which 90,086,830 shares
were issued and outstanding as of December 17, 1996;

           WHEREAS, the authorized capital stock of the Company consists of 100
shares of Common Stock, par value $.01 per share, all of which shares are owned
beneficially and of record by Cascade;

           WHEREAS, the authorized capital stock of Sahara consists of (i)
7,000,474 shares of Preferred Stock, of which 3,636,000 are designated as Series
A Preferred Stock, par value $.01 per share, of which 3,636,000 are issued and
outstanding (the "SERIES A PREFERRED"), of which 1,311,843 are designated as
Series B Preferred Stock, par value $.01 per share, of which 1,311,843 are
issued and outstanding (the "SERIES B PREFERRED"), of which 1,052,632 are
designated as Series C Preferred Stock, par value $.01 per share, of which
1,052,632 are issued and outstanding (the "SERIES C PREFERRED") (the Series A, B
and C Preferred are collectively referred to herein as the "SAHARA PREFERRED");
and of which 1,000,000 shares are undesignated; and (ii) 20,000,000 shares of
Common Stock, par value $.01 per share (the "SAHARA COMMON"), of which
12,991,500 shares are issued and outstanding;

           WHEREAS, the respective Boards of Directors of the Company and Sahara
have by resolutions approved this Agreement and deem it advisable for the mutual
benefit of the Constituent Corporations, and of the respective stockholders of
each, that the Company merge with and into Sahara under and pursuant to the
General Corporation Law of the State of Delaware (the "DELAWARE CORPORATION
LAW") and upon the terms and subject to the conditions hereinafter set forth;

           WHEREAS, to induce Cascade and the Company to enter into this
Agreement, simultaneously with the execution and delivery of this Agreement,
Sahara and certain of its stockholders and employees have entered into certain
agreements with Cascade and the Company pursuant to which such Sahara
stockholders and employees have undertaken to take certain actions in connection
with the transactions contemplated by this Agreement;

           WHEREAS, the parties intend by executing and delivering this
Agreement to adopt a plan of reorganization within the meaning of Section 368(a)
of the Internal Revenue Code of 1986, as amended (the "CODE"); and
                                                      

           WHEREAS, the parties intend that the Merger be treated as a
"purchase" transaction for accounting purposes.

           NOW, THEREFORE, in consideration of these premises and the mutual
agreements, provisions and covenants contained in this Agreement, the parties
hereby agree as follows:


                                      -4-
<PAGE>   6
                     Agreement and Plan of Merger -- Page 5



                                  ARTICLE I

                                  THE MERGER

         1.1 THE MERGER. In accordance with Section 251 of the Delaware 
Corporation Law, the Company shall be merged with and into Sahara (the
"MERGER"), and Sahara shall be the surviving corporation (such corporation in
its capacity as such surviving corporation being hereinafter called the
"SURVIVING CORPORATION"). The terms and conditions of the Merger, the mode of
carrying the same into effect, and the manner and basis of converting shares of
each of the Constituent Corporations into the consideration which the holders of
those shares are to receive upon conversion of such shares, shall be as set
forth in this Agreement.

         1.2 EFFECTIVE TIME. The Merger shall become effective as of the time 
of the filing of the executed certificate of merger with the Secretary of State
of Delaware pursuant to Section 251(c) of the Delaware Corporation Law (the 
"EFFECTIVE TIME").

         1.3 CERTAIN EFFECTS OF THE MERGER. As of the Effective Time, the effect
of the Merger shall be as provided in this Agreement, the Certificate of Merger
and the applicable provisions of the Delaware Corporation Law. Without limiting
the generality of the foregoing and subject thereto, at the Effective Time: the
separate existence of the Company shall cease and the Company shall be merged
into Sahara; the Surviving Corporation shall possess, without further act or
deed, all the rights, privileges, powers and franchises of a public as well as
of a private nature, and be subject to all the restrictions, disabilities and
duties of each of the Constituent Corporations; and any and all rights,
privileges, powers and franchises of each of the Constituent Corporations, and
all property, real, personal and mixed, and all debts due to any of the
Constituent Corporations on whatever account, as well for stock subscriptions as
all other things in action or belonging to each of the Constituent Corporations
shall be vested in the Surviving Corporation; and all property, rights,
privileges, powers and franchises, and all and every other interest shall be
thereafter as effectively the property of the Surviving Corporation as they were
of the several and respective Constituent Corporations, and the title to any
real estate vested by deed or otherwise, in any of the Constituent Corporations,
shall not revert or be in any way impaired by reason of the Merger; but all
rights of creditors and all liens upon any property of any of the Constituent
Corporations shall be preserved unimpaired, and all debts, liabilities and
duties of the respective Constituent Corporations shall thenceforth attach to
the Surviving Corporation, and may be enforced against it to the same extent as
if such debts, liabilities and duties had been incurred or contracted by it. Any
action or proceeding, whether civil, criminal or administrative, pending by or
against any of the Constituent Corporations shall be prosecuted as if the Merger
had not taken place, and the Surviving Corporation may be substituted in such
action or proceeding.

         1.4 CERTIFICATE OF INCORPORATION. At the Effective Time, the 
certificate of incorporation of the Company, as in effect immediately prior to
the Effective Time, shall be the certificate of incorporation of the Surviving
Corporation until thereafter amended as provided by law and such certificate of
incorporation; PROVIDED, HOWEVER, that at the Effective Time the certificate of
incorporation of the Surviving Corporation shall be amended so that the name of
the Surviving Corporation shall be Sahara Networks, Inc.

         1.5 BY-LAWS. The by-laws of the Company, as in effect immediately prior
to the Effective Time shall be, at the Effective Time, the by-laws of the 
Surviving Corporation until thereafter amended.

         1.6 DIRECTORS AND OFFICERS. The directors and officers of the 
Surviving Corporation from and after the Effective Time shall be the directors
and officers of the Company immediately prior to the Effective Time, each to
hold office in accordance with applicable law and the certificate of
incorporation and by-laws of the Surviving Corporation.


                                      -5-
<PAGE>   7
                     Agreement and Plan of Merger -- Page 6



         1.7     CERTAIN OTHER AGREEMENTS. Concurrently with the execution and
delivery of this Agreement:

                (a)          Sahara shall deliver to Cascade and the Company:

                         (i) a copy of the Participation Agreement in the form
        of EXHIBIT A (the "PARTICIPATION AGREEMENT") duly executed and delivered
        by Sahara and the stockholders named therein (the "MAJOR STOCKHOLDERS");

                         (ii) a copy of the Registration Rights Agreement in the
        form of EXHIBIT B (the "REGISTRATION RIGHTS AGREEMENT" duly executed and
        delivered by Sahara's stockholders;

                         (iii) a copy of the Escrow Agreement in the form of
        EXHIBIT C (the "ESCROW AGREEMENT") duly executed and delivered by the
        Stockholder Representatives (as hereinafter defined); and

                         (iv) a copy of the Key Employee Noncompetition,
        Nondisclosure and Developments Agreement in the form of EXHIBIT D duly
        executed by Messrs. Reeves, Shea and Kraskey (the "NONCOMPETITION
        AGREEMENTS").

                (b)      Cascade and the Company shall deliver to the respective
other parties thereto copies of the Participation Agreement, the Registration
Rights Agreement, the Escrow Agreement and the Noncompetition Agreements duly
executed by Cascade, the Company or both, as the case may be.

         1.8    At the Effective Time, Cascade shall deliver to Fleet National
Bank, or any successor escrow agent appointed pursuant to the Escrow Agreement
(the "ESCROW AGENT"), (i) shares representing twelve percent (12%) of the shares
of Cascade Common (determined without regard to clause (ii) below) issued to
Sahara stockholders pursuant to Section 2.3 (other than shares of Cascade Common
reserved for issuance upon exercise of outstanding warrants and Outstanding
Sahara Options (as defined in Section 2.7 hereof)) (the "GENERAL ESCROW SHARES")
and (ii) additional shares representing forty-four percent (44%) of the shares
of Cascade Common (determined without regard to clause (i) above) issued to each
of the Sahara stockholders named in SCHEDULE 1.8 in exchange for their shares of
Sahara Common as further illustrated on SCHEDULE 1.8 (the "SPECIFIC ESCROW
SHARES"), all of the shares referenced in clause (i) and (ii) above to be held
and applied in accordance with Article IX herein and the Escrow Agreement.
General Escrow Shares and Specific Escrow Shares are sometimes hereinafter
collectively referred to as the "ESCROW SHARES."

         1.9    The stockholders of Sahara, by virtue of their approval of the
Agreement, will be deemed to have irrevocably constituted and appointed,
effective as of the Effective Time, Thomas Shea (together with his permitted
successors, the "STOCKHOLDER REPRESENTATIVE"), as their true and lawful agent
and attorney-in-fact to enter into any agreement in connection with the
transactions contemplated by this Agreement and any transactions contemplated by
the Escrow Agreement, to exercise all or any of the powers, authority and
discretion conferred on him under any such agreement, to waive any terms and
conditions of any such agreement (other than the Merger consideration), to give
and receive notices on their behalf and to be their exclusive representative
with respect to any matter, suit, claim, action or proceeding arising with
respect to any transaction contemplated by any such agreement, including,
without limitation, the defense, settlement or compromise of any claim, action
or proceeding for which Cascade or the Company may be entitled to
indemnification and the Stockholder Representative agrees to act as, and to
undertake the duties and responsibilities of, such agent and attorney-in-fact.
This power of attorney is coupled with an interest and is irrevocable. The
Stockholder Representative shall not be liable for any action taken or not taken
by him in connection with his obligations under this Agreement (i) with the
consent of stockholders who, as of the date of this Agreement, owned a majority
in number of the outstanding shares of Sahara Common (treating Sahara Preferred
on an as-converted basis) or (ii) in the absence of his own gross negligence or
willful misconduct. If the Stockholder Representative 


                                      -6-
<PAGE>   8
                     Agreement and Plan of Merger -- Page 7



shall be unable or unwilling to serve in such capacity, his successor shall be
named by those persons holding a majority of the outstanding shares of Sahara
Common (treating Sahara Preferred on an as-converted basis) at the Effective
Time who shall serve and exercise the powers of the Stockholder Representative
hereunder.


                                   ARTICLE II
 
                      CONVERSION AND EXCHANGE OF SECURITIES

         2.1      SHARES OF THE SURVIVING CORPORATION. The authorized number 
and par value of shares of all classes of stock of the Company immediately
prior to the Effective Time shall be the authorized number and par value of
shares of the classes of stock of the Surviving Corporation from and after
the Effective Time.

         2.2      CONVERSION OF COMPANY COMMON. At the Effective Time, each 
share of Common Stock, par value $.01 per share, of the Company issued and
outstanding immediately prior to the Effective Time shall, by virtue of the
Merger and without any action on the part of the holder thereof, automatically
be converted into and represent one validly issued, fully paid and
nonassessable share of Common Stock, par value $.01 per share, of the   
Surviving Corporation.

         2.3      CONVERSION OF SAHARA SECURITIES. The maximum number of Cascade
Common to be issued in exchange for all issued and outstanding shares of Sahara
Common and Sahara Preferred immediately prior to the Effective Time (other than
shares of Sahara Common and Sahara Preferred (i) held in the treasury of Sahara,
which shall not be considered as outstanding for purposes of this Agreement,
(ii) held by Cascade or any subsidiary of Cascade or Sahara, (iii) which are
Dissenting Shares (as hereinafter defined) or (iv) which are purchased by
Cascade for cash pursuant to Section 2.3(h)) and reserved for issuance upon
exercise of outstanding warrants to purchase Sahara Common and the exercise of
Outstanding Sahara Options shall be 3,800,000. Pursuant to the foregoing, at the
Effective Time each share of Sahara capital stock shall, by virtue of the Merger
and without any action on the part of the holder thereof, automatically be
canceled and extinguished and converted into the right to receive the following:

                  (a) with respect to each share of Sahara Common, a fraction of
a share of Cascade Common (the "COMMON EXCHANGE RATIO"), as determined in
accordance with EXHIBIT E, upon surrender of the certificate or certificates
representing such shares of Sahara Common in the manner provided in Section 2.6;

                  (b) with respect to each share of Sahara Series A Preferred, a
fraction of a share of Cascade Common (the "SERIES A EXCHANGE RATIO"), as
determined in accordance with EXHIBIT E, upon surrender of the certificate or
certificates representing such shares of Series A Preferred in the manner
provided in Section 2.6;

                  (c) with respect to each share of Sahara Series B Preferred, a
fraction of a share of Cascade Common (the "SERIES B EXCHANGE RATIO"), as
determined in accordance with EXHIBIT E, upon surrender of the certificate or
certificates representing such shares of Series B Preferred in the manner
provided in Section 2.6; and

                  (d) with respect to each share of Sahara Series C Preferred, a
fraction of a share of Cascade Common (the "SERIES C EXCHANGE RATIO"), as
determined in accordance with EXHIBIT E, upon surrender of the certificate or
certificates representing such shares of Series C Preferred in the manner
provided in Section 2.6.

                  (e) At the Effective Time, each share of Sahara Common or
Sahara Preferred held (i) in the treasury of Sahara, or (ii) by Cascade or any
subsidiary of Cascade or Sahara, immediately prior to the Effective Time shall,
by virtue of the Merger and without any action on the part of the holder
thereof, automatically be canceled and retired and all rights in respect thereof
shall cease to exist.


                                      -7-
<PAGE>   9
                     Agreement and Plan of Merger -- Page 8


                  (f) If between the date of this Agreement and the Effective
Time, the outstanding shares of Cascade Common, Sahara Common or Sahara
Preferred shall have been changed (subject to compliance with the applicable
provisions of Article V) into a different number of shares or a different class,
by reason of any stock dividend, subdivision, reclassification, split-up,
combination, exchange of shares or the like, the Common Exchange Ratio, Series A
Exchange Ratio, Series B Exchange Ratio and Series C Exchange Ratio, as the case
may be, shall be appropriately adjusted.

                  (g) Each certificate representing shares of Cascade Common to
be issued in the Merger shall bear a legend substantially in the following form:

                  THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
                  REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT BE
                  OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR
                  HYPOTHECATED UNLESS AND UNTIL SUCH SHARES ARE REGISTERED UNDER
                  SUCH ACT OR AN OPINION OF COUNSEL SATISFACTORY TO CASCADE IS
                  OBTAINED TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED.
                  THE HOLDER OF THIS CERTIFICATE IS ENTITLED TO CERTAIN
                  REGISTRATION RIGHTS SET FORTH IN A REGISTRATION RIGHTS
                  AGREEMENT DATED JANUARY 2, 1997, A COPY OF WHICH MAY BE
                  OBTAINED FROM THE SECRETARY OF CASCADE.

                  (h) Notwithstanding anything to the contrary in this
Agreement, if, at the Effective Time, a non-accredited and non-sophisticated
stockholder of Sahara, as determined in good faith by Cascade, has not retained
a purchaser representative, then at Cascade's election such stockholder shall
receive, in lieu of shares of Cascade Common, the Average Cascade Price per
share in cash for each share of Cascade Common such stockholder would otherwise
have received pursuant to this Section 2.3 after giving effect to the provisions
of Section 1.8 hereof.

         2.4      EXCHANGE AGENT. State Street Bank and Trust Company, or such
other national or state bank as is selected by Cascade, shall act as the agent
for Sahara stockholders for purposes of mailing and receiving transmittal
letters and distributing consideration to Sahara stockholders (the "EXCHANGE 
AGENT").

         2.5      NO FRACTIONAL CASCADE COMMON. Notwithstanding any other 
provision of this Agreement, neither certificates nor scrip for fractional
shares of Cascade Common shall be issued to any holder of Sahara Common or
Sahara Preferred in the Merger and the holder thereof shall not be entitled to
any voting or other rights of a holder of shares or a fractional share
interest. Each holder of shares of Sahara Common or Sahara Preferred who
otherwise would have been entitled to receive a fraction of a share of Cascade
Common (after aggregating all fractional shares of Cascade Common to be
received by such holder) shall receive in lieu thereof cash (rounded to the
nearest whole cent), without interest, in an amount determined by multiplying
such holder's fractional interest by the Average Cascade Price. All amounts of
cash in respect of fractional interests which have not been claimed at the end
of three years from the Effective Time by surrender of certificates for shares
of Sahara Common or Sahara Preferred shall be repaid to the Surviving
Corporation, subject to the provisions of applicable escheat or similar laws,
for the account of the holders entitled thereto.

         2.6      DISTRIBUTION OF CASCADE COMMON. (a) As soon as practicable 
after the Effective Time, the Exchange Agent shall distribute (i) the Cascade
Common as provided in this Section 2.6, (ii) any cash in respect of fractional
shares as provided in Section 2.5 and (iii) any cash in respect of shares of
Sahara Common or Sahara Preferred purchased by Cascade pursuant to Section
2.3(h). Cascade shall deliver to the Exchange Agent cash and one or more
certificates representing in the aggregate the number of shares of Cascade
Common issuable in the Merger in exchange for shares of Sahara Common or
Sahara Preferred outstanding at the Effective 


                                      -8-
<PAGE>   10
                     Agreement and Plan of Merger -- Page 9


Time in sufficient time for the Exchange Agent to make such distribution of
Cascade Common and cash as provided for in the foregoing sentence. The Exchange
Agent shall not be entitled to vote or exercise any rights of ownership with
respect to any shares of Cascade Common held by it from time to time hereunder,
except that it shall receive and hold all dividends or other distributions paid
or distributed with respect to such shares for the account of the persons
entitled thereto.

                (b) At the Effective Time, each holder of an outstanding
certificate or certificates for shares of Sahara Common or Sahara Preferred
shall cease to have any rights as a stockholder of Sahara, except such rights,
if any, as such holder may have with respect to Dissenting Shares. Each such
holder of an outstanding certificate or certificates for shares of Sahara Common
or Sahara Preferred converted in the Merger, upon surrender of each such
certificate to the Exchange Agent, shall receive promptly in exchange for each
such certificate the shares of Cascade Common and cash for fractional shares (if
any) to which such holder is entitled pursuant to Sections 2.3 and 2.5 of this
Agreement. Pending such surrender and exchange, such holder's certificate or
certificates for shares of Sahara Common or Sahara Preferred shall be deemed for
all corporate purposes, by virtue of the Merger and without any action on the
part of the holder thereof, to evidence only the right to receive the shares of
Cascade Common and cash (if any) provided for under this Agreement. Unless and
until any such outstanding certificates for shares of Sahara Common or Sahara
Preferred shall be so surrendered, no dividend (cash or stock) payable to
holders of record of shares of Cascade Common as of any date subsequent to the
Effective Time shall be paid to the holder of any such outstanding certificate
and such holder's other rights as a stockholder of Cascade shall be suspended,
but upon such surrender of such outstanding certificate there shall be paid to
the record holder of the certificate of shares of Cascade Common issued in
exchange therefor the amount of dividends, if any, without interest and less any
taxes which may have been imposed thereon, that have theretofore become payable
with respect to the number of those shares of Cascade Common represented by such
certificate issued upon such surrender and exchange, and such holder's other
rights as a stockholder of Cascade shall thereafter be restored.

         2.7    SAHARA STOCK OPTIONS. At or prior to the Effective Time, 
Cascade and Sahara shall take all action necessary to cause the assumption by
Cascade as of the Effective Time of the options to purchase Sahara Common
outstanding as of the Effective Time (the "OUTSTANDING SAHARA OPTIONS") and
warrants to purchase Sahara Common outstanding as of the Effective Time. Each
of the Outstanding Sahara Options and the outstanding warrants shall be
converted without any action on the part of the holder thereof into an option
to purchase shares of Cascade Common as of the Effective Time. The number of
shares of Cascade Common that the holder of an outstanding warrant or an
assumed Outstanding Sahara Option shall be entitled to receive upon the
exercise of such option shall be a number of whole and fractional shares
determined by multiplying the number of shares of Sahara Common subject to such
warrant or option, determined immediately before the Effective Time, by the
Exchange Ratio applicable to shares of Sahara Common. The exercise price of
each share of Cascade Common subject to an outstanding warrant or assumed
Outstanding Sahara Option shall be the amount (rounded up to the nearest whole
cent) obtained by dividing the exercise price per share of Sahara Common at
which such warrant or option is exercisable immediately before the Effective
Time by the Common Exchange Ratio applicable to shares of Sahara Common, but
shall be not less than $.001. The assumption and substitution of the warrants
and Outstanding Sahara Options as provided herein shall not give the holders of
such warrants or options additional benefits which they did not have
immediately prior to the Effective Time or relieve the holders of any
obligations or restrictions applicable to their warrants or options or the
shares obtainable upon exercise of the warrants or options. Only whole shares
of Cascade Common shall be issued upon exercise of any outstanding warrants or
Outstanding Sahara Option, and in lieu of receiving any fractional share of
Cascade Common, the holder of such warrant or option shall receive in cash the
fair market value of the fractional share, net of the applicable exercise price
of the fractional share and applicable withholding taxes. Cascade shall (i)
reserve out of its authorized but unissued shares of Common Stock sufficient
shares to provide for the exercise of the outstanding warrants and Outstanding
Sahara Options and (ii) use all reasonable efforts to register under the
Securities Act, as promptly as practicable after the Effective Time, those
shares of Cascade Common to be issued upon the exercise of the Outstanding
Sahara Options for a period ending on the first date 


                                      -9-
<PAGE>   11
                     Agreement and Plan of Merger -- Page 10


by which all Outstanding Sahara Options have been exercised, which registration
shall initially be effective under a registration statement on Form S-8 or such
other form as may be permitted under the Securities Act.

         2.8 CLOSING OF STOCK TRANSFER BOOKS. The stock transfer books of 
Sahara shall be closed at the close of business on the business day immediately
preceding the Effective Time. In the event of a transfer of ownership of Sahara
Common or Sahara Preferred which is not registered in the transfer records of
Sahara, the shares of Cascade Common and cash for fractional shares (if any) to
be issued in the Merger as provided herein may be delivered to a transferee, if
the certificate representing such Sahara Common or Sahara Preferred is
presented to the Exchange Agent, accompanied by all documents required to
evidence and effect such transfer and by payment of any applicable stock
transfer taxes.

         2.9 DISSENTING SHARES. Shares of Sahara Common or Sahara Preferred 
that have not been voted for adoption of this Agreement and with respect to
which appraisal rights shall have been properly perfected in accordance with
Section 262 of the Delaware Corporation Law (the "DISSENTING SHARES") shall not
be converted into the right to receive shares of Cascade Common and cash (if
any) in accordance with this Agreement at or after the Effective Time, unless
and until the holder of such Dissenting Shares withdraws such holder's demand
for such appraisal in accordance with Section 262(k) of the Delaware
Corporation Law or becomes ineligible for such appraisal. If a holder of
Dissenting Shares shall withdraw in accordance with Section 262(k) of the
Delaware Corporation Law or such holder's demand for such appraisal or shall
become ineligible for such appraisal, then, as of the later of the Effective
Time or the occurrence of such event, such holder's Dissenting Shares shall
cease to be Dissenting Shares and shall be converted into the right to receive
the shares of Cascade Common and cash (if any) into which such holder's Sahara
Common or Sahara Preferred was converted as of the Effective Time pursuant to
this Agreement. Any amounts to be paid to holders of Dissenting Shares with     
respect to such Dissenting Shares shall be paid by the Surviving Corporation.


                                   ARTICLE III

             ARTICLE III - REPRESENTATIONS AND WARRANTIES OF SAHARA

        Sahara hereby represents and warrants to each of Cascade and the Company
as follows:

         3.1 CORPORATE EXISTENCE AND POWER. Sahara is a corporation duly 
incorporated, validly existing and in good standing under the laws of the State
of Delaware and has all corporate power and authority necessary to enable it to
own, lease or otherwise hold its properties and assets and to carry on its
business as now conducted and currently proposed to be conducted. Sahara is
duly qualified to do business as a foreign corporation and is in good standing
in each jurisdiction where the character of the property owned or leased by it
or the nature of its activities makes such qualification necessary, except for
those jurisdictions where the failure to be so qualified would not have a
Material Adverse Effect (as defined in Section 10.9(c) hereof) on Sahara. All
jurisdictions in which Sahara is so qualified to do business are listed in
SCHEDULE 3.1. Sahara has previously delivered to Cascade and the Company true
and complete copies of the certificate of incorporation and by-laws of Sahara,
as amended to date and as currently in effect, and all minutes of meetings
(including actions in lieu thereof) of the board of directors (and each
committee thereof) and stockholders of Sahara.

         3.2 CORPORATE AUTHORIZATION. (a) The execution, delivery and 
performance by Sahara of this Agreement and the Participation Agreement and the
consummation by Sahara of the Merger and other transactions contemplated hereby
and thereby are within Sahara's corporate power and authority, and have been
duly authorized by all necessary corporate action (other than the Stockholder
Approval as defined in Section 3.2(b) below). The Board of Directors of Sahara
has (i) unanimously determined that this Agreement and the transactions
contemplated hereby, including the Merger, are fair to and in the best interest
of Sahara's stockholders, (ii) unanimously approved this Agreement and the 
transactions contemplated hereby, including the 


                                      -10-
<PAGE>   12

                   Agreement and Plan of Merger -- Page 11


Merger, and (iii) unanimously resolved to recommend approval and adoption of
this Agreement and the Merger by Sahara's stockholders. This Agreement has been
duly authorized, executed and delivered by Sahara and constitutes a valid and
binding obligation of Sahara, enforceable against Sahara in accordance with its
terms.

                (b) The affirmative vote of (i) the holders of a majority the
outstanding shares of Sahara's Common Stock and Preferred Stock, voting together
as a single class, and (ii) the holders of a majority of the Preferred Stock,
voting together as a single class, are the only votes (collectively, the
"STOCKHOLDER APPROVAL") of Sahara's capital stock necessary to approve this
Agreement and the Merger.

         3.3    GOVERNMENTAL AUTHORIZATION. The execution, delivery and 
performance by Sahara of this Agreement, and the consummation of the Merger and
other transactions contemplated by this Agreement by Sahara, do not and will
not require any consent, approval or action by or in respect of, or any
declaration, filing or registration with, any governmental or regulatory body,
court, agency, official or authority (each, a "GOVERNMENTAL AUTHORITY"), other
than (i) routine filings with the Secretary of State of the State of Delaware
necessary to consummate the Merger, and (ii) where the failure to obtain such
consents, approvals, action or to make such declaration, filing or
registration, would not have a Material Adverse Effect.

         3.4    NON-CONTRAVENTION. Except as disclosed on SCHEDULE 3.4, the 
execution, delivery and performance by Sahara of this Agreement and the
Participation Agreement, and the consummation of the Merger and other
transactions contemplated by this Agreement and the Participation Agreement by
Sahara, do not and will not, with or without the giving of notice, the lapse of
time or both: (i) contravene or conflict with the certificate of incorporation
or by-laws of Sahara, (ii) assuming compliance with the matters referred to in
Section 3.3, contravene or conflict with or constitute a violation of any
provision of any law, rule, regulation, judgment, injunction, order or decree
currently in effect and binding upon or applicable to Sahara, (iii) require any
consent, approval or other action by any person, contravene or conflict with or
constitute a violation of or a default under, or give rise to any right of
termination, cancellation or acceleration of any right or obligation of Sahara
or to a loss of any benefit to which Sahara is entitled, under any provision of
(A) any material agreement, contract, indenture, lease or other instrument
binding upon Sahara or (B) assuming compliance with the matters referred to in
Section 3.3, any material license, franchise, permit or other similar
authorization held by Sahara or (iv) except for the rights of any holders of
Dissenting Shares, result in the creation or imposition of any mortgage,
pledge, security interest, lien, claim, charge, restriction, encumbrance or
assessment of any kind (each, a "LIEN") on any asset of Sahara.

         3.5    CAPITALIZATION. The authorized capital stock of Sahara consists
of (i) 7,000,474 shares of Preferred Stock, of which 3,636,000 are designated
Series A Preferred and 3,636,000 of which are issued and outstanding and none
of which are held in the treasury of Sahara, of which 1,311,842 are designated
as Series B Preferred Stock and 1,311,842 of which are issued and outstanding
and none of which are held in the treasury of Sahara, of which 1,052,632 are
designated as Series C Preferred and 1,052,632 of which are issued and
outstanding and none of which are held in the treasury of Sahara, and (ii)
20,000,000 shares of Sahara Common, of which 12,991,500 shares are issued and
outstanding and none of which shares are held in the treasury of Sahara. All
issued and outstanding shares of Sahara Common and Sahara Preferred are validly
issued, fully paid and nonassessable, and have not been issued in violation of
any preemptive, first refusal or other subscription rights of any stockholder
of Sahara or any other person, and have been issued in compliance with federal
and state securities laws. Except as set forth on SCHEDULE 3.5, there are no
outstanding (i) shares of capital stock or other voting securities of Sahara,
(ii) securities of Sahara convertible into or exchangeable for shares of
capital stock or voting securities of Sahara, (iii) options, warrants, exchange
rights, subscription rights or other agreements, commitments or rights to
purchase or otherwise acquire from Sahara, or agreements, commitments or
obligations of Sahara to issue or sell, any capital stock, voting securities or
securities convertible into or exchangeable for capital stock or voting
securities of Sahara or (iv) any agreement, commitment or obligation of Sahara
to grant, or enter into any such option, warrant, call, right, commitment or
agreement (the items in clauses (i), (ii) (iii) and (iv) being referred to
collectively as the "SAHARA SECURITIES"). Except as set forth on 


                                      -11-
<PAGE>   13
                     Agreement and Plan of Merger -- Page 12


SCHEDULE 3.5, there are no outstanding obligations of Sahara to sell, issue or
deliver, or to repurchase, redeem or otherwise acquire, any Sahara Securities.
SCHEDULE 3.5 sets forth a true and complete list of the record, and, to the
knowledge of Sahara, the beneficial owners of all Sahara Securities.

         3.6      SUBSIDIARIES. Sahara does not hold or own, directly or 
indirectly, any capital stock or other equity securities of any other
corporation, or have any direct or indirect equity or ownership interest in any
association, partnership, joint venture or other entity.

         3.7      FINANCIAL STATEMENTS. Sahara has previously delivered to 
Cascade and the Company the following financial statements (collectively, the 
"FINANCIAL STATEMENTS"):

                (i) the audited consolidated balance sheet of Sahara as of
        December 31, 1995 and the related statements of operations,
        stockholders' equity and cash flows for the period from inception
        through December 31, 1995 together with the notes thereto, in each case
        audited by, and accompanied by the report thereon, of Ernst & Young, LLP
        ("E&Y"); and

                (ii) the unaudited consolidated balance sheet of Sahara as of
        November 30, 1996 (the "UNAUDITED BALANCE SHEET") and the related
        statements of operations and cash flows for the eleven months then
        ended.

Each of the Financial Statements has been prepared in accordance with generally
accepted accounting principles applied on a consistent basis; and fairly
presents the financial position of Sahara as of its date or the results of
operations or changes in financial position, as is appropriate, of Sahara for
the periods then ended (subject, in the case of unaudited interim financial
statements to normal recurring year-end adjustments, which adjustments will not
be material in amount or effect). The account records underlying the Financial
Statements accurately and fairly reflect, in reasonable detail, the transactions
of Sahara, and Sahara's books of account have been maintained on a consistent
basis. All accounts receivable of Sahara are valid and enforceable, are not
subject to any valid defense, set off or counterclaim, and are collectible in
full in accordance with their terms in the ordinary course of business of
Sahara, except to the extent of any reserves therefor reflected on the Unaudited
Balance Sheet or taken in the ordinary course of business which in the aggregate
are not material to Sahara.

         3.8      ABSENCE OF UNDISCLOSED LIABILITIES. Sahara has no material 
liabilities or obligations, except those liabilities or obligations which are
(a) fully reflected or in the aggregate adequately reserved against in the
Unaudited Balance Sheet (including any notes thereto), (b) disclosed in this
Agreement or in SCHEDULE 3.8 hereto, or (c) incurred in the ordinary course of
business and in the aggregate are not material to Sahara. To the knowledge of
Sahara, there is no basis for any assertion against Sahara of any material
liability or obligation of any nature or in any amount not (a) fully reflected
or in the aggregate adequately reserved against in the Unaudited Balance Sheet,
(b) disclosed in this Agreement or in SCHEDULE 3.8 hereto, or (c) incurred in
the ordinary course of business and in the aggregate not material in amount to
Sahara. For the purposes of this Agreement the phrase "LIABILITIES OR
OBLIGATIONS" shall include any direct or indirect indebtedness, claim, loss,
damage, deficiency (including deferred income tax and other net tax
deficiencies), cost, expense, obligation, guarantee, or responsibility, whether
accrued, absolute or contingent, known or unknown, fixed or unfixed, liquidated
or unliquidated, secured or unsecured.

         3.9      PROPERTIES. Except as set forth in SCHEDULE 3.9, all of the 
assets and properties of Sahara are reflected on the Unaudited Balance Sheet
(except to the extent not required to be so reflected by generally accepted
accounting principles), and Sahara has good, valid and marketable title to all
of its owned assets and properties, whether real, personal or mixed, tangible
or intangible, that are material to the business of Sahara, free and clear of
all Liens, except (a) Liens for current taxes not delinquent or being contested
in good faith by appropriate proceedings, (b) Liens in connection with
workmen's compensation, unemployment insurance or other social security
obligations, (c) deposits or pledges to secure bids, tenders, contracts (other
than contracts for the payment of money), leases, statutory obligations, surety 
and appeal bonds and other obligations of like nature 


                                      -12-
<PAGE>   14
                     Agreement and Plan of Merger -- Page 13


arising in the ordinary course of business, (d) mechanic's, workman's,
materialmen's or other like Liens arising in the ordinary course of business
with respect to obligations which are not due or which are being contested in
good faith, and (e) such imperfections of title, Liens, easements and
encumbrances, if any, as are not substantial and do not materially detract from
the value, or materially interfere with the present use, of any of the
properties subject thereto or effected thereby, or otherwise have a Material
Adverse Effect on Sahara.

         3.10 REAL PROPERTY. Sahara does not own any real property. Set forth 
on SCHEDULE 3.10 is an accurate and complete list and summary description of
all real property currently leased by or on behalf of Sahara and, except as set
forth on SCHEDULE 3.10, none of the described leases require any consent to the
transactions contemplated by this Agreement. Sahara has previously delivered to
Cascade and the Company accurate and complete copies of all leases listed and
described on SCHEDULE 3.10. Except as set forth on SCHEDULE 3.10, Sahara has
possession of each of the aforementioned properties and, to the knowledge of
Sahara, no event has occurred which, with the lapse of time or notice or both,
could result in a material default under any of the described leases. All rents
or other material payment obligations which have become due in respect of each
of such leased properties have been paid, Sahara has complied in all material
respects with its obligations under the said leases and Sahara has not received
any notice of any breach of its obligations under any covenants, agreements,
statutory requirements, planning consents, by-laws, orders and regulations
affecting any of such properties (whether owned or leased), their use and any 
business of Sahara there carried on.

         3.11 CONDITION OF TANGIBLE ASSETS. All material tangible property, 
including the real property and structures thereon, of Sahara is in good
operating condition, reasonable wear and tear excepted, and the operation and
use of such property in the business of Sahara conforms in all material
respects to all applicable laws, ordinances, regulations, permits, licenses and
certificates.

         3.12 INTELLECTUAL PROPERTY. Sahara owns, or is licensed or otherwise 
possesses legally enforceable rights to use all patents, trademarks, trade
names, service marks, copyrights, and any applications therefor, maskworks,
formulae, net lists, designs, schematics, technology, know-how, computer
software programs or applications (in both source code and object code form),
and tangible or intangible proprietary information or material that are used or
proposed to be used in the business of Sahara as currently conducted or as
proposed to be conducted by Sahara (excluding any of the foregoing validly
licensed or purchased from third parties as set forth on SCHEDULE 3.12(b), the
"SAHARA INTELLECTUAL PROPERTY RIGHTS"). SCHEDULE 3.12(a) sets forth a list of
all trademarks, service marks, trade names, registered copyrights and patents
(and any applications for the registration thereof) owned or licensed and used
or held for use by Sahara which relate to or are part of Sahara's products or
proposed products or are used in the business of Sahara, specifying as to each,
as applicable: (i) the nature of such right; (ii) the owner of such right; and
(iii) the jurisdictions by or in which such right has been issued or registered
or in which an application for such issuance or registration has been filed,
including the respective registration or application numbers. Sahara has
received executed assignments for each of Sahara's patents and patent
applications listed in SCHEDULE 3.12(a), and has recorded the assignments for
each of Sahara's United States patents and patent applications in the United
States Patent and Trademark Office. All registered trademarks, service marks
and copyrights held by Sahara are valid and subsisting. All patents held by
Sahara are valid and subsisting, and all patent applications held by Sahara are
pending in their respective patent office, and Sahara is unaware of any defects
in the prosecution of any such application that would irrevocably foreclose the
grant of patent rights under such application.

        SCHEDULE 3.12(b) sets forth a complete list of (i) all licenses,
sublicenses and other agreements as to which Sahara is a party and pursuant to
which any person is authorized to use any Sahara Intellectual Property Right or
any trade secret material to Sahara including the identity of all parties
thereto, and (ii) all licenses, sublicenses and other agreements as to which
Sahara is a party and pursuant to which Sahara is authorized to use (1) any
third party patents, trademarks or copyrights (including software) (the "SAHARA
THIRD PARTY INTELLECTUAL PROPERTY RIGHTS") which are incorporated in, are, or
form a part of, any Sahara product, or (2) any trade secret of a third party in
or as to any Sahara product including the identity of all parties thereto.
Sahara has no reason to believe 



                                      -13-
<PAGE>   15
                     Agreement and Plan of Merger -- Page 14


that the Sahara Third Party Intellectual Property Rights are not owned by or
have not been assigned or licensed to the licensor of such right. Sahara is not,
nor will it be as a result of the execution and delivery of this Agreement or
the performance of its obligations hereunder, in breach or violation of any
license, sublicense or agreement described on SCHEDULE 3.12(b).

        No claims with respect to Sahara Intellectual Property Rights, any trade
secret material to Sahara, or Sahara Third Party Intellectual Property Rights
(to the extent arising out of any use, reproduction or distribution of such
Sahara Third Party Intellectual Rights by or through Sahara), have been asserted
or are threatened by any person. Sahara does not know of any valid grounds for
any bona fide claims (i) to the effect that the manufacture, sale, licensing or
use of any product as now used, sold or licensed or proposed for use, sale or
license by Sahara infringes on any copyright, patent, trademark, service mark or
trade secret, (ii) against the use by Sahara of any trademarks, trade names,
trade secrets, copyrights, patents, technology, know-how or computer software
programs and applications used in Sahara's business as currently conducted or as
proposed to be conducted by Sahara, (iii) challenging the ownership, validity or
effectiveness of any of Sahara Intellectual Property Rights or other trade
secret material to Sahara, or (iv) challenging Sahara's license or legally
enforceable right to use, or the validity or effectiveness of Sahara Third Party
Intellectual Rights. Sahara (i) has not been sued or charged in writing as a
defendant in any claim, suit, action or proceeding which involves a claim of
infringement of any patents, trademarks, service marks, copyrights or violation
of any trade secret or other proprietary right of any third party, (ii) except
as set forth in SCHEDULE 3.12(d), has not been threatened or charged in writing,
orally or otherwise with infringement or violation of any patents, trademarks,
service marks, copyrights or trade secrets or other proprietary right of any
third party, and (iii) has no knowledge of the basis for any such threat or
claim.

        To the knowledge of Sahara, there is no unauthorized use, disclosure,
infringement or misappropriation of any of Sahara Intellectual Property Rights
or any trade secret material to Sahara, or any Sahara Third Party Intellectual
Property Right to the extent licensed by or through Sahara, by any third party,
including any employee or former employee of Sahara. Sahara has no products,
proposed products, infringement liability with respect to, or infringement or
violation by Sahara of, any patent, trademark, service mark, copyright, trade
secret or other proprietary right to any third party.

        No Sahara Intellectual Property Right, trade secret material to Sahara,
or Sahara Third Party Intellectual Property Right is subject to any outstanding
order, judgment, decree, legal or governmental proceeding (other than pending
applications for patent, trademark registration or copyright registration) or
stipulation restricting in any manner the licensing thereof by Sahara. Except
for contracts licensing Sahara's products executed in the ordinary course of
business and in accordance with Sahara's past practices, Sahara has not entered
into any agreement to indemnify any other person against any charge of
infringement of any Sahara Third Party Intellectual Property Right.

        Sahara has taken reasonable measures consistent with industry practice
to protect and preserve (i) the validity and enforceability of trademarks
included in the Sahara Intellectual Property Rights, (ii) the confidentiality
and validity and enforceability of copyrights or pending patent applications
included in the Sahara Intellectual Property Rights, (iii) the validity and
enforceability of patents included in the Sahara Intellectual Property Rights,
and (iv) the confidentiality and validity and enforceability of its trade
secrets and other confidential information. Except as set forth on SCHEDULE
3.12(c), all employees and consultants of Sahara have executed a nondisclosure
and assignment of inventions agreements to protect the confidentiality and to
vest in Sahara exclusive ownership of such Intellectual Property Rights. To the
knowledge of Sahara, no material trade secret or confidential information of
Sahara has been used, divulged or appropriated for the benefit of any person
other than Sahara or otherwise to the detriment of Sahara. No employee or
consultant of Sahara has used any trade secrets or other confidential
information of any other person in the course of their work for Sahara and,
except as set forth in SCHEDULE 3.12(d), Sahara has not been sued, charged or
threatened with any such claim. Sahara has no written or oral agreements with
employees or consultants with respect to the ownership of 


                                      -14-
<PAGE>   16
                     Agreement and Plan of Merger -- Page 15


inventions, trade secrets or other works created by them as a result of which
any such employee or consultant may have nonexclusive rights to the portions of
Sahara's Intellectual Property Rights so created by such individual.

         No officer, employee or consultant of Sahara is, or is now expected to
be, in violation of any term of any employment contract, patent disclosure
agreement, proprietary information agreement, noncompetition agreement,
nonsolicitation agreement, confidentiality agreement, or any other similar
contract or agreement or any restrictive covenant relating to the right of any
such officer, employee or consultant to be employed or engaged by Sahara because
of the nature of the business conducted or to be conducted by Sahara or relating
to the use of trade secrets or proprietary information of others; to Sahara's
best knowledge and belief, the continued employment or retention of its
officers, employees or consultants does not subject Sahara to any liability with
respect to any of the foregoing matters; and, except as set forth in SCHEDULE
3.12(d), Sahara has not been sued, charged or threatened with any claim with
respect to any of the foregoing matters.

         3.13     ABSENCE OF CERTAIN CHANGES. Except as disclosed in 
SCHEDULE 3.13, since November 30, 1996, the business of Sahara has been
conducted in the ordinary course and there has not been:

                   (i) any event, occurrence, development or state of
        circumstances or facts which has had or could reasonably be expected to
        result in or have a Material Adverse Effect on Sahara;

                  (ii) any declaration, setting aside or payment of any dividend
        or other distribution with respect to any shares of capital stock of
        Sahara, or any repurchase, redemption or other acquisition by Sahara of
        any outstanding shares of capital stock or other securities of, or other
        equity or ownership interests in, Sahara;

                 (iii) any amendment of any term of any outstanding security of 
        Sahara;

                  (iv) any incurrence, assumption or guarantee by Sahara of any
        indebtedness for borrowed money other than in the ordinary course of
        business, but in any event not exceeding an aggregate of $50,000;

                   (v) any creation or assumption by Sahara of any Lien on any
        asset, other than Liens that do not in the aggregate materially detract
        from the value of such assets or materially impair the use thereof in
        the operation of the business of Sahara;

                  (vi) any making of any loan, advance or capital contributions 
        to or investment in any person;

                 (vii) any damage, destruction or other casualty loss (whether
        or not covered by insurance) affecting the business or assets of Sahara
        which has had or would reasonably be expected to result in or have a
        Material Adverse Effect on Sahara;

                (viii) any acquisitions of any capital assets or any other 
        investments for aggregate consideration in excess of $50,000;

                  (ix) any sale, lease, pledge, transfer or other disposition of
        any capital assets for aggregate consideration in excess of $50,000;

                   (x) any transaction or commitment made, or any contract or
        agreement entered into, by Sahara relating to its assets or business
        (including the acquisition or disposition of any assets) other than
        those transactions covered by any other subparagraphs of this Section
        3.13 or any relinquishment by Sahara of any contract or other right, in
        either case, involving an amount in excess of $50,000, other than


                                      -15-
<PAGE>   17

                     Agreement and Plan of Merger -- Page 16


        transactions, commitments and relinquishments in the ordinary course of
        business and those contemplated by this Agreement;

                  (xi) any change in any method of accounting or accounting 
        practice by Sahara;

                 (xii) any (A) grant of any severance or termination pay to any
        director, officer or employee of Sahara, (B) entering into of any
        employment, severance, management, consulting, deferred compensation or
        other similar agreement (or any amendment to any such existing
        agreement) with any director, officer, consultant or employee of Sahara,
        (C) change in benefits payable under existing severance or termination
        pay policies or employment, severance, management, consulting or other
        similar agreements or (D) change in compensation, bonus or other
        benefits payable to directors, consultants, officers or employees of
        Sahara;

                (xiii) any labor dispute, other than routine individual
        grievances, or any activity or proceeding by a labor union or
        representative thereof to organize any employees of Sahara, or any
        lockouts, strikes, slowdowns, work stoppages or threats thereof by or
        with respect to any employees of Sahara;

                 (xiv) any agreement or commitment containing a covenant
        limiting or purporting to limit the freedom of Sahara to compete with
        any person in any geographic area or engage in any line of business;

                  (xv) any joint venture or similar arrangement which involves a
        sharing of profits or future payments to other persons; or

                 (xvi) any agreement, undertaking or commitment to do any of the
        foregoing.

         3.14     LITIGATION. There is no action, suit, investigation or 
proceeding pending against or, to the knowledge of Sahara, and except as set
forth in SCHEDULE 3.14, threatened against or affecting, Sahara or any of its
properties or assets before any court or arbitrator or any Governmental
Authority. Except as set forth in SCHEDULE 3.14, there is no litigation pending
or, to the knowledge of Sahara, except set forth in SCHEDULE 3.14, threatened
against any officer or key employee relating to Sahara or its business. Neither
Sahara nor any officer or key employee is subject to any judgment, order or
decree relating to Sahara entered in any lawsuit or proceeding or issued by any
Governmental Authority. The foregoing sentences include, without limiting their
generality, actions pending or threatened (or any basis therefor known to
Sahara) involving the prior employment or engagement of any of the Sahara's
officers or key employees or their use in connection with Sahara's business of
any information or techniques allegedly proprietary to any of their former
employers or to any other Person.

         3.15     MATERIAL CONTRACTS. (a) Except for agreements, contracts, 
plans, leases, arrangements or commitments disclosed in SCHEDULE 3.15 or the
Financial Statements provided to Cascade pursuant to this Agreement, Sahara is
not a party to or subject to:

                   (i) any collective bargaining agreement;

                  (ii) any agreements that contain any unpaid severance 
        liabilities or obligations;

                 (iii) any bonus, deferred compensation, incentive compensation,
        pension, profit-sharing or retirement plans, or any other employee
        benefit plans or arrangements;

                  (iv) any employment or consulting agreement, contract or
        commitment with an employee or individual consultant or salesperson or
        consulting or sales agreement, contract or commitment with a firm or
        other organization not terminable by Sahara on 90 days' notice without
        liability except to the extent 


                                      -16-
<PAGE>   18
                     Agreement and Plan of Merger -- Page 17


        applicable local law and/or general principles of wrongful termination 
        law may limit Sahara's ability to terminate such employees;

                   (v) any agreement or plan, including, without limitation, any
        stock option plan, stock appreciation right plan or stock purchase plan,
        any of the benefits of which will be increased, or the vesting of
        benefits of which will be accelerated, by the occurrence of any of the
        transactions contemplated by this Agreement or the value of any of the
        benefits of which will be calculated on the basis of any of the
        transactions contemplated by this Agreement;

                  (vi) any fidelity or surety bond or completion bond;

                 (vii) any lease of personal property having a remaining value 
        individually in excess of $50,000;

                (viii) any agreement of indemnification or guaranty;

                  (ix) any agreement, contract or commitment containing any
        covenant limiting the freedom of Sahara to engage in any line of
        business or compete with any person;

                   (x) any agreement, contract or commitment relating to capital
        expenditures and involving future obligations in excess of $50,000;

                  (xi) any agreement, contract or commitment relating to the
        disposition or acquisition of assets not in the ordinary course of
        business or any ownership interest in any corporation, partnership,
        joint venture or other business enterprise;

                 (xii) any mortgages, indentures, loans or credit agreements,
        security agreements or other agreements or instruments relating to the
        borrowing of money or extension of credit, including guaranties referred
        to in clause (viii) hereof

                (xiii) any purchase order or contract for the purchase of raw 
        materials or acquisition of assets involving $50,000 or more;

                 (xiv) any construction contracts;

                  (xv) any distribution, joint marketing, teaming or development
        agreement;

                 (xvi) any distributor, dealer, franchise, original equipment
        manufacturer, value-added reseller, manufacturer's representative or
        sales agency contract or commitment;

                (xvii) any agreements pertaining to Sahara's maintenance or 
        support of its products, services or supplies; or

               (xviii) any other agreement, contract or commitment which
        involves $50,000 or more and is not cancelable without penalty within
        thirty (30) days.

        Sahara has not breached, or received any claim or threat that it has
breached, any of the terms or conditions of (i) any agreement, contract or
commitment set forth in any of Sahara's Schedules or (ii) any other material
agreement, contract or commitment in such a manner as would permit any other
party to cancel or terminate the same or would permit any other party to seek
damages from Sahara that would have a Material Adverse Effect on Sahara. Each
agreement, plan, contract or commitment set forth in any of Sahara's Schedules
is a valid and binding agreement of Sahara and each other party thereto and is
in full force and effect and is not 


                                      -17-
<PAGE>   19
                     Agreement and Plan of Merger -- Page 18


subject to any material default thereunder of which Sahara is aware by any party
obligated to Sahara pursuant thereto. Sahara has obtained, or will obtain prior
to the Effective Time, all necessary consents, waivers and approvals as are
required in connection with the Merger under any of Sahara's material
agreements, contracts, licenses or leases.

                (b) There is no contract, agreement, commitment or obligation to
which Sahara is a party or is bound that at the time it was entered into or made
was, or is currently, known or expected by Sahara to result in any loss to
Sahara upon completion or performance thereof, or any bid, offer or proposal
which if accepted would result as such a contract, agreement, commitment or
obligation.

                (c) Except as disclosed in SCHEDULE 3.15, Sahara is not a party
to any agreement with any of its securityholders or optionholders, or any
affiliate thereof, nor, to the knowledge of Sahara, without inquiry by Sahara,
is any securityholder or optionholder of Sahara a party to any agreement with
any other such securityholder or optionholder relating to Sahara or any of its
securities.

         3.16     TAXES. (a) The term "TAXES" as used herein means all
federal, state, local, foreign and other net income, gross income, gross
receipts, sales, use, ad valorem, transfer, franchise, profits, license, lease,
service, service use, withholding, payroll, employment, excise, severance,
stamp, occupation, premium, property, windfall profits, customs duties,
unemployment insurance, environmental, worker's compensation, Pension Benefit
Guaranty Corporation premiums and all other taxes, fees, assessments or other
charges of any kind similar to Taxes, together with any interest and any
penalties, additions to tax or additional amounts with respect thereto, and the
term "TAX" means any one of the foregoing taxes. The term "RETURNS" as used
herein means all returns, declarations, reports, statements and other documents
required to be filed in respect of Taxes, including information returns or
reports with respect to backup withholding and other payments to third parties,
and "RETURN" means any one of the foregoing returns. All citations to the Code,
or the Treasury Regulations promulgated thereunder, shall include any amendments
or any substitute or successor provisions thereto. The representations and
warranties contained in this Section 3.16 shall pertain to the period from
Sahara's inception up to and including the Effective Time.

                  (b) Sahara has filed all Returns required to be filed by or on
its behalf on a timely basis and such Returns are true, complete and correct.
None of the Returns filed or required to be filed by Sahara contains or will
contain a disclosure statement under former Section 6661 or Section 6662 of the
Code or any similar provision of any state, local or foreign law.

                  (c) All Taxes shown to be payable by Sahara on the Returns or
on subsequent assessments with respect thereto have been paid in full on a
timely basis, and no other Taxes are payable by Sahara with respect to items or
periods covered by such Returns (whether or not shown on or reportable on such
Returns) or with respect to any period ending on or prior to the Effective Time.
Sahara has withheld and paid over all Taxes required to have been withheld and
paid over by it, and complied in all respects with all information reporting and
backup withholding requirements, including maintenance of required records with
respect thereto, in connection with amounts paid or owing to any employee,
creditor, independent contractor or other third party. There are no Liens on any
of the assets of Sahara with respect to Taxes, other than Liens for Taxes not
yet due and payable or for ad valorem property Taxes that Sahara is contesting
in good faith through appropriate proceedings and for which appropriate reserves
have been established, which reserves are fully reflected in the Financial
Statements and no Liens will arise as a result of the transactions contemplated
by this Agreement.

                  (d) The amount of Sahara's liability for unpaid Taxes for all
periods does not, in the aggregate, exceed the amount of the net current
liability accruals for Taxes set forth on the Unaudited Balance Sheet and Sahara
will incur no additional Taxes subsequent to the date of the Unaudited Balance
Sheet until the Effective Time except in the ordinary course of business.


                                      -18-
<PAGE>   20
                     Agreement and Plan of Merger -- Page 19

 
                 (e) No issues have been raised (and are currently pending) by
any taxing authority in connection with any of the Returns of Sahara. No waivers
of statutes of limitation with respect to any of the Returns have been given by
or requested from Sahara. All deficiencies asserted or assessments made as a
result of any examinations have been fully paid, or are fully reflected as a
liability in the Financial Statements, or are being contested and an appropriate
reserve therefor has been established and is fully reflected in the Financial
Statements. All elections with respect to Taxes affecting Sahara, as of the date
hereof, are set forth in the Returns, other than any such elections which are
not required to be included in the Returns, copies of which have been made
available to Buyer. As of the Effective Time Sahara will not be, and as of the
date hereof, except as set forth in SCHEDULE 3.16, Sahara is not, a party to any
agreement, contract, arrangement or plan that has resulted or would result,
separately or in the aggregate, in the payment of (i) any "excess parachute
payments" within the meaning of Section 280G of the Code (without regard to the
exceptions in Sections 280G(b)(4) and 280G(b)(5) of the Code) or (ii) any other
amount for which a deduction would be disallowed under Section 162(m) or Section
404 of the Code. Sahara has not agreed to make any adjustment under Section
481(a) of the Code by reason of a change in accounting method or otherwise, and
Sahara will not be required to make any such adjustment as a result of the
transactions contemplated by this Agreement. Sahara is not a party to any safe
harbor lease within the meaning of Section 168(f)(8) of the Code, as in effect
prior to amendment by the Tax Equity and Fiscal Responsibility Act of 1982.
Sahara is not and has not ever been, a "United States real property holding
corporation" within the meaning of Section 897(c)(2) of the Code. None of the
Major Stockholders nor any other holder of Sahara Common or Sahara Preferred is
a "foreign person" as that term is defined in Section 1445 of the Code. Sahara
is not (and has not ever been) a party to a tax-sharing agreement and has not
assumed the liability of any other person for Taxes under contract. Sahara has
not ever been a member of a group of corporations filing a consolidated, unitary
or combined Return. Sahara has not taken any action that would have the effect
of deferring any material liability for Taxes for Sahara from any taxable period
ending at or before the Effective Time to any taxable period thereafter. Sahara
has not participated in or cooperated with any international boycott within the
meaning of Section 999 of the Code. Except as set forth on SCHEDULE 3.16, as of
the Closing Date the ability of Sahara to use its net operating loss and other
carryovers will not have been affected by Sections 382, 383 or 384 of the Code
(other than as a result of the Merger). No claim has ever been made by a tax
authority in a jurisdiction where Sahara does not file Returns that it is or may
be subject to Tax in that jurisdiction. The transactions set forth in this
Agreement are not subject to the Tax withholding provisions of Section 3406 of
the Code, or of Subchapter A of Chapter 3 of the Code or of any other provision
of law. Sahara is not a party to any joint venture, partnership, or other
arrangement or contract which could be treated as a partnership for federal
income tax purposes. Sahara has not had a permanent establishment in any foreign
country, as defined in any applicable Tax treaty or convention between the
United States and such foreign country. Sahara has never filed a consent
pursuant to Section 341(f) of the Code (or any corresponding provision of state,
local or foreign law), relating to collapsible corporations, or agreed to have
Section 341(f)(2) of the Code (or any corresponding provision of state, local or
foreign law) apply to the disposition of any asset owned by it. Sahara shall
have fully complied with all federal, state, local and foreign Tax withholding
obligations arising in connection with the cancellation or exercise of Sahara
options, rights and warrants, and Cascade shall have no liability therefor. Any
adjustment of Taxes made by the Internal Revenue Service in any examination
which is required to be reported to state, local, foreign or other taxing
authorities has been so reported, and any additional Taxes due with respect
thereto have been paid. No power of attorney has been granted by Sahara, and is
currently in force, with respect to any matter relating to Taxes.

         3.17     EMPLOYEES. SCHEDULE 3.17 sets forth a true and complete list
of (a) the names, titles, annual salaries and other compensation of all
employees of Sahara (the "EMPLOYEES") as of the date first above written and
the location at which such Employees regularly perform services for Sahara and
(b) the wage rates for non-salaried Employees of Sahara (by classification).
Any agreements, commitments or understandings between Sahara and any Employee
concerning such Employee's future salary, compensation or terms of employment
are summarized in SCHEDULE 3.17. Except as set forth on SCHEDULE 3.17, as of
the date first written above none of such Employees has indicated to Sahara
that he intends to resign or retire as a result of the transactions
contemplated by this Agreement or otherwise. Sahara has no Employees
represented by a union and Sahara (i) 
        

                                      -19-
<PAGE>   21
                     Agreement and Plan of Merger -- Page 20


to its knowledge, is in compliance with all applicable laws and regulations
respecting welfare and retirement benefit plans, employment wages and laws and
(ii) is not engaged in any unfair labor practice.

         3.18     TRANSACTIONS WITH AFFILIATES. Except as set forth in
SCHEDULE 3.18, there are no loans, leases, royalty agreements or other
continuing transactions between Sahara, on the one hand, and any affiliate of
Sahara, any of the stockholders of Sahara, any affiliate of any stockholder of
Sahara, or any member of any such stockholder's family, on the other hand. To
the knowledge of Sahara, none of the officers or directors of Sahara (a) has
any material direct or indirect interest in any entity which does business with
Sahara, (b) has any direct or indirect interest in any property, asset or right
which is used by Sahara in the conduct of its business, or (c) has any
contractual relationship with Sahara other than such relationships which occur
from being an employee, officer, director or stockholder of Sahara.
        
         3.19     INSURANCE COVERAGE. SCHEDULE 3.19 sets forth an accurate and
complete list of all insurance policies and fidelity bonds covering the assets,
business, equipment, properties, operations, employees, officers and directors
of Sahara. There is no claim by Sahara pending under any of such policies or
bonds as to which coverage has been questioned, denied or disputed by the
underwriters of such policies or bonds. All premiums payable under all such
policies and bonds have been paid, and Sahara has otherwise complied in all
material respects with the terms and conditions of all such policies and bonds.
Such policies of insurance and bonds (or other policies and bonds providing
substantially similar insurance coverage) have been in effect since the dates
indicated on SCHEDULE 3.19 and remain in full force and effect. Sahara has no
knowledge of any threatened termination of, or has received written notice of,
any premium increase with respect to, any of such policies or bonds.
        
         3.20     COMPLIANCE WITH LAWS; NO DEFAULTS. (a) Sahara is not in
violation of any applicable provisions of any law, statute, ordinance,
regulation, judgment, order, injunction, permit,license, certificate or other
authorization, or its governing instruments, except for violations that have
not had and could not reasonably be expected to have a Material Adverse Effect
on Sahara.

                (b) Sahara is not in material default under, and to its
knowledge no condition exists that with notice or lapse of time or both would
constitute a material default under, any applicable law, statute, ordinance,
regulation, judgment, order, injunction, permit, license, certificate or other
authorization, or its governing instruments.

                (c) Sahara is in compliance with all currently applicable laws
respecting employment and employment practices, terms and conditions of
employment and wages and hours, and is not engaged in any unfair labor practice,
failure to comply with which or engagement in which, as the case may be, has
had, or could reasonably be expected to have, a Material Adverse Effect on
Sahara. There is no unfair labor practice complaint pending or, to the knowledge
of Sahara, threatened against Sahara before the National Labor Relations Board.

         3.21     FINDERS' FEES. Except as set forth on SCHEDULE 3.21, there is
no investment banker, broker, finder or other intermediary that has been
retained by or is authorized to act on behalf of Sahara who might be entitled
to any fee or commission from Cascade, the Company, Sahara or any other person
upon consummation of the transactions contemplated by this Agreement.
        
         3.22     ENVIRONMENTAL MATTERS. (a) Except as disclosed on 
SCHEDULE 3.22,

                   (i) no notice, notification, demand, request for information,
        citation, summons, complaint or order has been issued, no complaint has
        been filed, no penalty has been assessed and no investigation or review
        is pending or, to Sahara's knowledge, threatened by any governmental
        entity or other person with respect to any (A) alleged violation by
        Sahara of any Environmental Law (as defined below) or liability
        thereunder, (B) alleged failure by Sahara to have any permit,
        certificate, license, approval, registration or 


                                      -20-
<PAGE>   22
                     Agreement and Plan of Merger -- Page 21


        authorization required under any Environmental law in connection with
        the conduct of its business or (C) Release of Hazardous Substances;

                  (ii) no polychlorinated biphenyls, radioactive material, urea
        formaldehyde, lead, asbestos, asbestos-containing material or
        underground storage tank (active or abandoned) is or was present at any
        property now owned or leased by Sahara or was present at any property
        owned or leased by Sahara in the five years preceding the date of this
        Agreement at, or at any time before, the time such property was sold or
        such lease was terminated by Sahara; and

                 (iii) there are no Environmental Liabilities (as defined below)
        that have had or may reasonably be expected to have a Material Adverse
        Effect on Sahara.

                (b)    There has been no environmental investigation, study, 
audit, test, review or other analysis conducted of which Sahara has possession,
or to the knowledge of Sahara, to which it has access, in relation to the
current or prior business of Sahara or any property or facility now or
previously owned or leased by Sahara which has not been delivered to Cascade at
least five days prior to the date hereof.

                (c)    Sahara has not transported or arranged for the
transportation (directly or indirectly) of any Hazardous Substance to any
location which is listed or, to Sahara's knowledge, proposed for listing under
CERCLA, or on any similar state list or which is the subject of Federal, state
or local enforcement actions or, to Sahara's knowledge, other investigations
which may lead to claims for clean-up costs, remedial work, damages to natural
resources or for personal injury claims, including, but not limited to, claims
under CERCLA or analogous state environmental clean-up laws.

                (d)    "CERCLA" means the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, as amended.

                (e)    "ENVIRONMENTAL LAWS" means any and all laws or
regulations, judicial decisions, orders or permits relating to the environment
or to emissions, discharges or releases of pollutants, contaminants, petroleum
or petroleum products, chemicals or industrial, toxic, radioactive or hazardous
substances or wastes into the environment including, without limitation, ambient
air, surface water, ground water, or land, or otherwise relating to the
manufacture, processing, distribution, use, treatment, storage, disposal,
transport or handling of pollutants, contaminants, petroleum or petroleum
products, chemicals or industrial, toxic, radioactive or hazardous substances
medical wastes or other wastes or the clean-up or other remediation thereof.

                (f)    "ENVIRONMENTAL LIABILITIES" means all liabilities arising
in connection with or in any way relating to the assets of Sahara or Sahara's
use or ownership thereof, whether vested or unvested, contingent or fixed,
actual or potential, which (i) arise under or relate to Environmental Laws or
arise in connection with or relate to any matter disclosed or required to be
disclosed in SCHEDULE 3.22 and (ii) arise from or relate in any way to actions
occurring or conditions existing before the Closing Date.

                (g)    "HAZARDOUS SUBSTANCE" means petroleum products or 
hazardous substances as defined in Section 101 of CERCLA.

                (h)    "RELEASE" has the meaning specified in 42 U.S.C. 
[Section] 9601(22).

                (i)     For purposes of this Section, the term "Sahara" shall
include any business or business entity (including a corporation) which is a
predecessor, in whole or in part, of Sahara.

         3.23     EMPLOYEE PLANS. (a) Sahara has set forth on SCHEDULE 3.23
all employee benefit plans (as defined in Section 3(3) of the Employee
Retirement Income Security Act of 1974, as amended ("ERISA")) and 
        

                                      -21-


<PAGE>   23

                     Agreement and Plan of Merger -- Page 22

all bonus, stock option, stock purchase, incentive, deferred compensation,
supplemental retirement, severance insurance (including any self-insured or
post-retirement arrangements), disability, vacation, profit-sharing and other
similar employee benefit plans, arrangements, policies or agreements, and all
unexpired severance agreements, written or otherwise, for the benefit of, or
relating to, any current or former employee of Sahara or any trade or business
(whether or not incorporated) which, together with Sahara would be treated as a
single employer under Section 414 of the Code (an "ERISA AFFILIATE"), (together,
the "SAHARA EMPLOYEE PLANS").

                (b) With respect to each Sahara Employee Plan, Sahara has made
available to Cascade, a true and correct copy of (i) the most recent annual
report (Form 5500), if applicable, filed with the Internal Revenue Service
("IRS"), (ii) such Sahara Employee Plan, (iii) each trust agreement and group
annuity contract, if any, relating to such Sahara Employee Plan, (iv) the most
recent actuarial report or valuation, if any, relating to a Sahara Employee Plan
and (v) an accurate summary plan description of such Sahara Employee Plan.

                (c) With respect to the Sahara Employee Plans, individually and
in the aggregate, no event has occurred, and to the knowledge of Sahara, there
exists no condition or set of circumstances in connection with which Sahara
could be subject to any liability that is reasonably likely to have a Material
Adverse Effect on Sahara, under ERISA, the Code or any other applicable law.

                (d) Each Sahara Employee Plan which is intended to be qualified
under Section 401(a) of the Code is so qualified and has been so qualified
during the period from its adoption to date, and each trust forming a part
thereof is exempt from tax pursuant to Section 501(a) of the Code. Sahara has
furnished to Cascade copies of the most recent Internal Revenue Service
determination letters with respect to each such plan.

                (e) Each Sahara Employee Plan has been maintained in compliance
with its terms and with the requirements prescribed by any and all statutes,
orders, rules and regulations, including but not limited to ERISA and the Code,
which are applicable to such Sahara Employee Plan.

                (f) Neither Sahara nor any of its ERISA affiliates maintains or
has ever maintained or contributed to any "multiemployer plan" (as that term is
defined in Section 3(37) of ERISA) or any plan subject to Title IV of ERISA. No
"prohibited transaction" (as that term is defined in Section 406 of ERISA or
Section 4975 of the Code) has occurred with respect to any Sahara Employee Plan.
There is no contract, agreement, plan or arrangement covering any employee or
former employee of Sahara or any of its ERISA affiliates that, individually or
collectively, could give rise to the payment of any amount that would not be
deductible pursuant to the terms of Section 280G of the Code. No tax under
Section 4980B of the Code has been incurred in respect to any Sahara Employee
Plan that is a group health plan, as defined in Section 5000(b)(1) of the Code.
With respect to the employees and former employees of Sahara or any of its ERISA
affiliates, there are no employee post-retirement medical or health plans in
effect, except as required by Section 4980B of the Code.

                (g) With respect to the Sahara Employee Plans, individually and
in the aggregate, there are no funded benefit obligations for which
contributions have not been made or properly accrued and there are no unfunded
benefit obligations which have not been accounted for by reserves, or otherwise
properly footnoted in accordance with generally accepted accounting principles,
on the financial statements of Sahara, which obligations are reasonably likely
to have a Material Adverse Effect on Sahara.

                (h) Except as set forth in SCHEDULE 3.23, Sahara is not a party
to any oral or written (i) agreement with any officer or any other key employee
of Sahara, the benefits of which are contingent, or the terms of which are
materially altered, upon the occurrence of a transaction involving Sahara of the
nature contemplated by this Agreement, (ii) agreement with any officer of Sahara
providing any term of employment or compensation guarantee extending for a
period longer than one year from the date hereof or for the payment of
compensation in excess of $100,000 per annum, or (iii) agreement or plan,
including any stock option plan, stock 


                                      -22-
<PAGE>   24
                     Agreement and Plan of Merger -- Page 23

appreciation right plan, restricted stock plan or stock purchase plan, any of
the benefits of which will be increased, or the vesting of the benefits of which
will be accelerated, by the occurrence of any of the transactions contemplated
by this Agreement or the value of any of the benefits of which will be
calculated on the basis of any of the transactions contemplated by this
Agreement.

         3.24 OTHER INFORMATION. This Agreement and the Schedules hereto,
taken as a whole, do not contain an untrue statement of a material fact or omit
to state a material fact necessary in order to make the statements contained
therein not misleading.
        

                                   ARTICLE IV

            REPRESENTATIONS AND WARRANTIES OF CASCADE AND THE COMPANY

        Cascade and the Company hereby represent and warrant to Sahara as
follows:

         4.1 CORPORATE EXISTENCE AND POWER. Each of Cascade and the Company is
a corporation duly incorporated, validly existing and in good standing under
the laws of the State of Delaware and has all corporate power and authority
necessary to enable it to own, lease or otherwise hold its properties and
assets and to carry on its business as now conducted and proposed to be
conducted. Cascade is duly qualified to do business as a foreign corporation
and is in good standing in each jurisdiction where the character of the
property owned or leased by it or the nature of its activities makes such
qualification necessary, except for those jurisdictions where the failure to be
so qualified would not have a Material Adverse Effect on Cascade and its
subsidiaries, taken as a whole .
        
        4.2 CORPORATE AUTHORIZATION. The execution, delivery and performance by
Cascade and the Company of this Agreement, the Participation Agreement, the
Registration Rights Agreement, and the Escrow Agreement and the consummation by
Cascade and the Company of the Merger and other transactions contemplated
hereby and thereby, are within the corporate power and authority of Cascade and
the Company, respectively, and, have been duly authorized by all necessary
corporate action. Each of the Agreement, the Participation Agreement, the
Registration Rights Agreement and the Escrow Agreement has been duly and
validly authorized, executed and delivered by Cascade and the Company and
constitutes a valid and binding obligation of Cascade and the Company,
enforceable against Cascade and the Company in accordance with its terms.

        4.3 GOVERNMENTAL AUTHORIZATION. The execution, delivery and performance
by Cascade and the Company of this Agreement, and the consummation of the
Merger and other transactions contemplated by this Agreement by Cascade and the
Company, do not and will not require any consent, approval or action by or in
respect of, or any declaration, filing or registration with, any Governmental
Authority, other than (i) routine filings with the Secretary of State of the
State of Delaware necessary to consummate the Merger, (ii) compliance with the
applicable requirements of the Securities Act of 1933 (the "SECURITIES ACT"),
the Securities Exchange Act of 1934 (the "EXCHANGE ACT") and any applicable
state securities and blue sky laws in connection with the offering, sale and
delivery of the shares of Cascade Common to be issued in the Merger and (iii)
where the failure to obtain such consents, approvals, action, or to make such
declaration, filing or registration, would not have a Material Adverse Effect.

        4.4 NON-CONTRAVENTION. The execution, delivery and performance by
Cascade and the Company of this Agreement, and the consummation of the Merger
and other transactions contemplated by this Agreement by Cascade and the
Company, do not and will not, with or without the giving of notice, the lapse
of time or both: (i) contravene or conflict with the certificates of
incorporation or by-laws of Cascade or the Company; or (ii) assuming compliance
with the matters referred to in Section 4.3, contravene or conflict with or
constitute a 


                                      -23-
<PAGE>   25
                     Agreement and Plan of Merger -- Page 24

violation of any provision of any law, rule, regulation, judgment, injunction,
order or decree binding upon or applicable to Cascade or and the Company

         4.5      CAPITALIZATION. (a) As of December 17, 1996, the authorized
capital stock of Cascade consisted of (i) 2,000,0000 shares of Preferred Stock,
par value $.01 per share, none of which were issued and outstanding or held in
the treasury of Cascade, and (ii) 225,000,000 shares of Common Stock, par value
$.001 per share, of which 90,086,830 shares were issued and outstanding and no
shares were held in the treasury of Cascade. As of December 1, 1996, there were
reserved for issuance under Cascade's various stock plans (the "CASCADE PLANS")
an aggregate of up to 22,096,165 shares of Common Stock. Except as provided in
the immediately preceding sentence of this Section 4.5, as of December 1, 1996
there were no outstanding Cascade options, warrants, calls, rights, commitments
or agreements to which Cascade is a party or by which Cascade is bound
obligating Cascade to (x) issue, deliver or sell, or cause to be issued,
delivered or sold, additional shares of capital stock of Cascade or (y) grant,
execute or enter into any such option, warrant, call, right, commitment or
agreement.

                (b) The authorized capital stock of the Company consists of 100
shares of Common Stock, par value $.01 per share, all of which are issued and
outstanding and owned of record by Cascade. All issued and outstanding shares of
Cascade Common and Common Stock, par value $.01 per share, of the Company are
validly issued, fully paid and nonassessable, and have not been issued in
violation of any preemptive, first refusal or other subscription rights of any
stockholder of Cascade, the Company or any other person.

         4.6      SEC DOCUMENTS. Cascade has filed with the Commission and has
made available to Sahara a true and complete copy of the following Cascade
documents: (i) its annual report on Form 10-K for the fiscal year ended December
31, 1995; (ii) its quarterly reports on Form 10-Q for the fiscal quarters ended
March 30, 1996, June 29, 1996 and September 28, 1996; (iii) its current report
on Form 8-K dated July 11, 1996; (iv) its registration statement on Form S-3
that was declared effective on July 11, 1996; and (v) the proxy statement dated
April 5, 1996 (collectively, the "CASCADE SEC DOCUMENTS"), which are all of the
documents (other than preliminary material) that Cascade was required to file
with the Commission from December 31, 1995 through the date hereof. As of their
respective dates, the Cascade SEC Documents complied in all material respects
with the requirements of the Securities Act, or the Exchange Act, as the case
may be, and the rules and regulation of the Commission thereunder applicable to
such Cascade SEC Documents, and none of the Cascade SEC Documents, as of their
respective dates, contained any untrue statement of a material fact or omitted
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. None of Cascade's subsidiaries is required to file any forms,
reports or other documents with the Commission. The consolidated financial
statements of Cascade and its subsidiaries included in the Cascade SEC Documents
complied as to form in all material respects with the published rules and
regulations of the Commission with respect thereto, were prepared in accordance
with general accepted accounting principles applied on a consistent basis during
the periods involved (except as may be indicated in the notes thereto or, in the
case of the unaudited statements, as permitted by Rule 10-01 of Regulation S-X)
and fairly presented in accordance with applicable requirements of generally
accepted accounting principles (subject, in the case of the unaudited
statements, to normal recurring adjustments, none of which will be material) the
consolidated financial position of Cascade and its subsidiaries as of their
respective dates and the consolidated results of operations and the consolidated
cash flows of Cascade and its subsidiaries for the periods presented therein.
        
         4.7      CASCADE COMMON. The shares of Cascade Common to be issued and
exchanged for shares of Sahara Common and Sahara Preferred in the Merger will,
at the Effective Time, be duly authorized, validly issued, fully paid and
nonassessable and subject to no preemptive rights.

         4.8      OWNERSHIP OF THE COMPANY; NO PRIOR ACTIVITIES. (a) The 
Company was formed solely for the purpose of engaging in the transactions 
contemplated by this Agreement.


                                      -24-
<PAGE>   26
                     Agreement and Plan of Merger -- Page 25


                  (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 contemplated by this Agreement and except for
this Agreement and any other agreements or arrangements contemplated by this
Agreement, the Company has not and will not have incurred, directly or
indirectly, through any subsidiary or affiliate (other than its parent), 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.

                                    ARTICLE V

                                    COVENANTS

         5.1      MUTUAL COVENANTS AND AGREEMENTS. Each of the parties hereby   
covenants and agrees with the other parties as follows:

                  (a) COOPERATION. It shall cooperate fully with the other
parties hereto in furnishing any information or performing any action reasonably
requested by any such party, which information or action is necessary to the
successful consummation of the transactions contemplated by this Agreement or is
necessary, appropriate or desirable for the corporate purposes of Cascade.
Subject to its further rights under this Agreement, it shall use all reasonable
efforts to cause the Closing to occur at the earliest practicable time.

                  (b) OTHER REQUIRED INFORMATION. It shall furnish to the other
parties hereto any application or statement, and all information concerning
itself and its subsidiaries as is required to be set forth in any application or
statement, to be filed with any Governmental Authority in connection with the
transactions contemplated by this Agreement, or otherwise.

                  (c) CONFIDENTIALITY. Sahara and Cascade have agreed in a
nondisclosure agreement dated December 11, 1996 (the "NONDISCLOSURE AGREEMENT")
to, among other things, protect the confidential information of the other party.
The Company and Cascade each hereby affirm each of their obligations under such
agreement which shall continue in full force and effect in accordance with its
terms. If this Agreement is terminated in accordance with Section 8.1 hereof,
Cascade shall, and shall cause its agents, accountants, advisors, counsel and
other representatives to deliver to Sahara all documents and other material, and
all copies thereof, obtained by Cascade or on its behalf from Sahara in
connection with this Agreement, whether so obtained before or after the
execution hereof, and will not disclose any such information or documents to any
third parties or make any use of any confidential information contained therein.
If this Agreement is terminated in accordance with Section 8.1 hereof, Sahara
shall, and shall cause its agents, accountants, advisors, counsel and other
representatives to, deliver to Cascade all documents and other material, and all
copies thereof, obtained by Sahara or on its behalf or by a stockholder of
Sahara from Cascade in connection with this Agreement, whether so obtained
before or after the execution hereof, and will not disclose any such information
or documents to any third parties or make any use of any confidential
information contained therein.

                  (d) PUBLICITY. Except as otherwise required by applicable law
or by any applicable rules of any securities exchange or market, Sahara shall
not issue any press release or, prior to the Effective Time, make any other
public statement concerning the transactions contemplated by this Agreement
without obtaining the prior approval of Cascade.

                  (e) MISCELLANEOUS AGREEMENTS AND CONSENTS. Subject to the
terms and conditions provided in this Agreement, it shall use all reasonable
efforts to take, or cause to be taken, all action, and to do, or cause to be
done, all things necessary, appropriate or desirable under applicable laws and
regulations to consummate the transactions contemplated by this Agreement. It
will, and will cause each of its subsidiaries to, use their respective
reasonable efforts to obtain consents of all third parties and Governmental
Authorities necessary, appropriate or desirable for the consummation of the
transactions contemplated by this Agreement.


                                      -25-
<PAGE>   27
                     Agreement and Plan of Merger -- Page 26


                  (f) CERTAIN TAX MATTERS. It shall not, either before or after
the consummation of the Merger, take any action which would prevent the Merger
from qualifying as a tax-free reorganization under Section 368(a) of the Code.

                  (g) RESALE REGISTRATION STATEMENT. Promptly but in no event
later than five (5) business days after the Effective Time, Cascade shall file a
registration statement (the "RESALE REGISTRATION STATEMENT") on Form S-3
registering the shares of Cascade Common issued to the stockholders of Sahara
upon consummation of the Merger under the Securities Act and shall use
reasonable commercial efforts to cause the Resale Registration Statement to
become effective as expeditiously as possible and to remain effective until the
second anniversary of the Effective Time, all as more fully described in the
Registration Rights Agreement.

                (h) LOAN. Cascade and Sahara agree to use reasonable commercial
efforts to negotiate a loan agreement commencing the later of (i) seven business
days after the execution of this Agreement or (ii) the date the Information
Statement is mailed to Sahara Stockholders, pursuant to which Cascade shall
agree to loan Sahara an amount not to exceed $5 million in the event that this
Agreement is terminated pursuant to Section 8.1(a), (c), (g), (h) or (j) or by
Sahara pursuant to Section 8.1(b) with such terms and conditions including
interest rate as specified in EXHIBIT F, which loan shall be secured by a grant
in favor of Cascade of a first security interest in and to substantially all of
Sahara's assets (tangible and intangible); PROVIDED, HOWEVER, under no
circumstance shall Cascade be required to make the loan in the event of any
suit, action, claim, litigation or proceeding instigated by any party named on
SCHEDULE 3.14.

         5.2      CERTAIN COVENANTS OF SAHARA. Sahara hereby covenants and 
agrees with Cascade and the Company as follows:

                  (a) PRESERVATION OF BUSINESS ORGANIZATION. Sahara shall use
all reasonable efforts to preserve without material impairment the business
organization of Sahara and its goodwill as to payors, providers, suppliers,
distributors, clients and others having business relations with Sahara.

                  (b) CARRY ON IN REGULAR COURSE. Sahara shall carry on its
business in the ordinary course in a manner consistent with its past practices.

                  (c) CONSENTS. Sahara shall use all reasonable efforts to
obtain consents in writing to the transactions contemplated by this Agreement
and/or such amendments, assignments or modifications of such documents or
instruments as may be required in order that the transactions contemplated by
this Agreement shall not result in any default with respect to any law, rule,
regulation, order, decree, license, agreement, contract, commitment or
instrument to which Sahara is a party or by which Sahara, or any of its assets
is bound.

                  (d) CAPITAL STOCK. Sahara shall not redeem, purchase or
otherwise acquire, any Sahara Securities, or agree to do any of the foregoing .
Except for any agreement by which Sahara was bound immediately prior to the date
hereof and specifically disclosed on the Sahara Disclosure Schedules, Sahara
shall not accelerate, amend or change the period of exercisability of options or
restricted stock granted under employee stock plans or authorize cash payments
in exchange for any options granted under any of such plans. Sahara shall not
issue, deliver, sell or grant or authorize or propose the issuance, delivery,
sale or grant of, or purchase or propose the purchase of, any shares of its
capital stock or securities convertible into, or subscriptions, rights, warrants
or options to acquire, or other agreements or commitments of any character
obligating it to issue any such shares or other convertible securities, other
than the issuance by Sahara of (i) stock options that Sahara has disclosed in
SCHEDULE 3.17 hereto and (ii) shares of Sahara Common pursuant to the exercise
of stock options or warrants therefor outstanding as of the date of this
Agreement.



                                      -26-
<PAGE>   28
                     Agreement and Plan of Merger -- Page 27


                  (e) OTHER ACTIONS. Without the prior written consent or
approval of Cascade , Sahara shall not (i) amend its certificate of
incorporation or by-laws as describe in SCHEDULE 3.13, (ii) declare, set aside
or pay any dividend or otherwise make a distribution with respect to any shares
of capital stock of Sahara, or repurchase, redeem or otherwise acquire any
outstanding shares of capital stock or other securities of, or other equity or
ownership interests in, Sahara, (iii) amend any material term of any outstanding
security of Sahara,(iv) incur, assume or guarantee any indebtedness for borrowed
money other than in the ordinary course of business and in amounts and on terms
consistent with past practices, but in any event not exceeding an aggregate of
$50,000, (v) create or assume any Lien on any asset, other than Liens that do
not in the aggregate materially detract from the value of such assets or
materially impair the use thereof in the operation of the business of Sahara,
(vi) make any loan, advance or capital contributions to or investment in any
person, (vii) acquire any capital assets or any other investments for aggregate
consideration in excess of $50,000, (viii) sell lease, pledge, transfer or
dispose of any capital assets for aggregate consideration in excess of $50,000,
(ix) enter into any transaction or make any commitment or any contract or
agreement relating to its assets or business (including the acquisition or
disposition of any assets) or relinquish any contract or other right, in either
case, involving an amount in excess of $50,000, other than transactions,
commitments and relinquishments in the ordinary course of business consistent
with past practices and those contemplated by this Agreement, (x) other than in
the ordinary course of business, make or change any election in respect of
Taxes, adopt or change any method of accounting or accounting practice in
respect of Taxes, enter into any closing agreement, settle any claim in respect
of Taxes, or consent to any consent to any extension or waiver of the limitation
period applicable to any claim or assessment in respect of Taxes, (xi) except as
disclosed in SCHEDULE 5.2(e), grant any severance or termination pay to any
director, officer or employee of Sahara, enter into any employment, severance,
management, consulting, deferred compensation or other similar agreement (or any
amendment to any such existing agreement) with any director, officer or employee
of Sahara, change the benefits payable under existing severance or termination
pay policies or employment, severance, management, consulting or other similar
agreements or change the compensation, bonus or other benefits payable to
directors, officers or employees of Sahara, other than increases in the ordinary
course of business of the compensation of the employees of Sahara, (xii) enter
into any partnership arrangements, joint development agreements or strategic
alliances, (xiii) transfer or license to any person or entity or otherwise
extend, amend or modify in any material respect any rights to the Sahara
Intellectual Property Rights or enter into grants to future patent rights, other
than in the ordinary course of business, (xiv) make any grant of exclusive
rights to any third party, (xv) enter into any transaction with any of its
stockholders or any affiliates of any of its stockholders, other than in the
ordinary course of, and pursuant to the reasonable requirements of, its business
and upon terms that are no less favorable to Sahara than Sahara could obtain in
a comparable transaction with a person who was not such a stockholder or an
affiliate of such a stockholder or other than as contemplated by this Agreement,
or (xvi) agree to do any of the foregoing.

                  (f) ACCESS. Subject to the Nondisclosure Agreement, Sahara
shall permit officers, employees, agents, attorneys and accountants and other
persons designated by Cascade full access after reasonable notice during normal
business hours to the properties, books, contracts, commitments, tax returns,
examination reports of the Internal Revenue Service and other records of Sahara
in connection with and in furtherance of the transactions contemplated by this
Agreement. Unless prohibited by law or contract, such designees of Cascade shall
be furnished with true, accurate and complete copies of such contracts,
commitments and other records and all other information with respect to the
assets and business of Sahara as such designees may reasonably request.

                  (g) DOCUMENTS AND INFORMATION TO BE FURNISHED. Sahara shall
deliver to Cascade promptly after such documents are available Sahara's
unaudited monthly financial reports with respect to periods ending after the
date hereof and all other documents, financial statements, budgets, proxy or
information statements, reports, correspondence, notices and other items Sahara
delivers, or is required to deliver, to any of its stockholders.

                  (h) STOCKHOLDER CONSENT. Sahara shall take all action
necessary in accordance with applicable law to obtain the written consent of its
stockholders owning at least 95% of each class or series of Sahara's issued and
outstanding capital stock entitled to vote on this matter no later than January
23, 1997 (the 


                                      -27-
<PAGE>   29
                     Agreement and Plan of Merger -- Page 28


"STOCKHOLDER CONSENT") for the purpose of approving and adopting this Agreement
(including the transactions contemplated hereby). On or before January 13, 1997
or as promptly as practicable thereafter Sahara shall mail to each stockholder
who was a stockholder on the record date for determining stockholders entitled
to vote, (i) an information statement (the "INFORMATION STATEMENT") with respect
to the matters to be submitted for stockholder approval in the Stockholder
Consent, and its Board of Directors shall recommend to its stockholders the
adoption of this Agreement (including the transactions contemplated hereby),
(ii) the Consent, and (iii) a notice that appraisal rights are available for the
shares of Sahara Common and Sahara Preferred held by each such stockholder of
Sahara, together with a copy of Section 262 of the Delaware Corporation Law, in
satisfaction of Sahara's obligations under Section 262(d)(2) of the Delaware
Corporation Law. In addition, the Information Statement shall be accompanied by
such other information provided by Cascade as Cascade deems necessary in order
to provide for the offer and sale of the Cascade Common to be issued in the
Merger to be exempt from any applicable registration or qualification
requirements under either federal or state securities or "Blue Sky" laws. Sahara
shall use all reasonable efforts to obtain all votes and approvals of its
stockholders necessary for the approval and adoption of this Agreement under the
Delaware Corporation Law (including the transactions contemplated hereby).

                  (i) NOTICES OF CERTAIN EVENTS.  Sahara shall promptly notify 
        Cascade of:

                   (i) any notice or other communication from any person
        alleging that the consent of such person is or may be required in
        connection with the transactions contemplated by this Agreement;

                  (ii) any notice or other communication from any Governmental 
        Authority in connection with the transactions contemplated by this
        Agreement;

                 (iii) any actions, suits, claims, investigations or proceedings
        commenced relating to or involving or otherwise affecting Sahara that,
        if pending on the date of this Agreement, would have been required to
        have been disclosed pursuant to Article III or that relate to the
        consummation of the transactions contemplated by this Agreement; and

                  (iv) any matter arising and discovered after the date of this
        Agreement that, if existing or known on the date of this Agreement,
        would have been required to be disclosed pursuant to this Agreement or
        the Participation Agreement, or that constitutes a breach or prospective
        breach of this Agreement or the Participation Agreement by Sahara, the
        Major Stockholders or any of their affiliates.

                  (j) ACCURACY OF REPRESENTATIONS AND WARRANTIES. Sahara shall 
not (a) take or agree or commit to take any action that would make any
representation and warranty of Sahara hereunder inaccurate in any respect at, or
as of any time prior to, the Closing Date or (b) omit or agree or commit to omit
to take any action necessary to prevent any such representation or warranty from
being inaccurate in any respect at any such time.

                  (k) TERMINATION OF AGREEMENTS. Sahara shall terminate,
effective upon the Effective Time, all agreements among Sahara and any of its
securityholders or optionholders, or among any Sahara securityholders or
optionholders, providing for registration rights, rights of first refusal or
co-sale, relating to the voting of Sahara securities or requiring Sahara to
obtain the consent or approval of any such securityholders prior to taking or
failing to take any action, including without limitations: (i) the Second
Amended and Restated Registration Rights Agreement dated October 8, 1996; (ii)
the Voting Agreement dated October 8, 1996; (iii) Section 3 of the Amended and
Restated Shareholders' Agreement dated August 25, 1996; (iv) the Common Stock
and Series A Preferred Stock Purchase Agreement dated August 25, 1996 and all
amendments thereto; (v) the Series B Preferred Stock Purchase Agreement dated
April 30, 1996 and all amendments thereto; and (vi) the Series C Convertible
Preferred Stock Purchase Agreement dated October 8, 1996 and all amendments
thereto. In addition, Sahara shall cause the agreements and arrangements set
forth on SCHEDULE 5.2(k) to terminate at or prior to the Effective Time.



                                      -28-
<PAGE>   30
                     Agreement and Plan of Merger -- Page 29


                (l) NO SOLICITATION. From and after the date of this Agreement
until the earlier of the Effective Time or termination of this Agreement
pursuant to its terms, Sahara shall not, and will instruct its directors,
officers, employees, representatives, investment bankers, agents and affiliates
not to, directly or indirectly, initiate, solicit, encourage or participate in
discussions with, provide information to, or approve a transaction with, any
corporation, partnership, person or other entity or group concerning any merger,
purchase or sale of substantial assets, sale of shares of capital stock (or
securities convertible or exchangeable or otherwise evidencing, or any agreement
or instrument evidencing, the right to acquire capital stock) or similar
transaction involving Sahara ( all such transactions being referred to herein as
"ACQUISITION PROPOSALS"). Sahara will immediately cease any and all existing
activities, discussions or negotiations with any parties conducted heretofore
with respect to any of the foregoing. Sahara will (i) notify Cascade as promptly
as practicable if any inquiry or proposal is made or any information or access
is requested in writing in connection with an Acquisition Proposal or potential
Acquisition Proposal and (ii) as promptly as practicable notify Cascade of the
significant terms and conditions of any such Acquisition Proposal. In addition,
subject to the other provisions of this Section 5.2(l), from and after the date
of this Agreement until the earlier of the Effective Time and termination of
this Agreement pursuant to its terms, Sahara will not, and will instruct their
respective directors, officers, employees, representatives, investment bankers,
agents and affiliates not to, directly or indirectly, make or authorize any
public statement, recommendation or solicitation in support of any Acquisition
Proposal made by any person, entity or group (other than Cascade).

         5.3      COVENANTS OF CASCADE AND THE COMPANY. Cascade and the Company 
hereby covenant and agree with Sahara as follows:

                (a) PRESERVATION OF BUSINESS ORGANIZATION. Cascade shall use all
reasonable efforts to cause to preserve without material impairment the business
organization of Cascade and its subsidiaries and their goodwill as to payors,
providers, suppliers, distributors, clients and others having business relations
with Cascade and its subsidiaries.

                (b) CONSENTS. Cascade shall use all reasonable efforts to obtain
consents in writing to the transactions contemplated by this Agreement and/or
such amendments, assignments or modifications of such documents or instruments
as may be required in order that the transactions contemplated by this Agreement
shall not result in any default with respect to any law, rule, regulation,
order, decree, license, agreement, contract, commitment or instrument to which
Cascade is a party or by which Cascade or any of its assets is bound.

                (c) DOCUMENTS AND INFORMATION TO BE FURNISHED. Cascade shall
furnish to Sahara, promptly after filed with the Commission, its unaudited
quarterly financial reports in the form filed with the Commission on Form 10-Q
prescribed under the Exchange Act and such other reports, statements, documents
and other items Cascade files with the Commission or delivers, or is required to
deliver, to any of its stockholders.

                (d) NOTICES OF CERTAIN EVENTS. Cascade shall promptly notify 
Sahara of:

                   (i) any notice or other communication from any person
        alleging that the consent of such person is or may be required in
        connection with the transactions contemplated by this Agreement;

                  (ii) any notice or other communication from any Governmental 
        Authority in connection with the transactions contemplated by this
        Agreement; and

                 (iii) any actions, suits, claims, investigations or proceedings
        commenced relating to or involving or otherwise affecting Cascade or any
        of its subsidiaries that, if pending on the date of this Agreement,
        would have been required to have been disclosed pursuant to Article IV
        or that relate to the consummation of the transactions contemplated by
        this Agreement.


                                      -29-
<PAGE>   31
                     Agreement and Plan of Merger -- Page 30


                                   ARTICLE VI

                                 CLOSING MATTERS

         6.1      THE CLOSING. Subject to the satisfaction or waiver of all 
conditions precedent set forth in Article VII, the closing of the Merger (the
"CLOSING") shall be held at the offices of Testa, Hurwitz & Thibeault, LLP,
125 High Street, Boston, Massachusetts 02110, on January 24, 1997 or as soon as
thereafter as practicable (the "CLOSING DATE"). If any condition in Article VII
is not satisfied in any material respect (or is not duly waived) at the
Closing, any party whose obligations are subject to such condition may extend
the period in which the Closing must be consummated (during which period each
other party shall use its respective reasonable efforts to cause all such
conditions to be satisfied in all material respects). If all conditions are
determined to be satisfied in all material respects (or are duly waived) at the
Closing (whether or not delayed), the Closing shall be consummated by the
making of all necessary filings with the Secretary of State of Delaware under
the Delaware Corporation Law. If the Closing is consummated Cascade will be
deemed to have waived any of the conditions set forth in Sections 7.1 and 7.2
to the extent not satisfied at or prior to the Closing.

         6.2      DOCUMENTS AND CERTIFICATES. Each of Cascade, the Company and 
Sahara shall use all reasonable efforts, on or prior to the Closing, to
execute and deliver all such instruments, documents or certificates as may be
necessary or advisable, on the advice of counsel, for the consummation at the
Closing of the transactions contemplated by this Agreement or to cause the
Effective Time, subject to consummation at the Closing, to occur as soon as
practicable.


                                   ARTICLE VII

                              CONDITIONS OF CLOSING

         7.1      CONDITIONS TO OBLIGATIONS OF CASCADE, THE COMPANY AND
SAHARA. The obligations of each of Cascade, the Company and Sahara under this 
Agreement to cause the Merger to be consummated are, at its option, subject to 
the satisfaction of the following conditions:

                (a) GOVERNMENTAL APPROVALS. Cascade, the Company and Sahara
shall have received all necessary approvals of Governmental Authorities of the
transactions contemplated by this Agreement, and each of such approvals shall
remain in full force and effect at the Closing Date. It is understood that none
of such approvals shall be deemed to have been received if any such approval is
subject to satisfaction of or compliance with a Burdensome Condition.
"BURDENSOME CONDITION" shall mean the imposition of a material restriction on
Cascade's or Sahara's ability to operate Sahara and its subsidiaries following
the Effective Time or requiring Cascade or Sahara to dispose of a material
amount of the assets of Sahara or Cascade or any of their subsidiaries following
the Effective Time. Any of Cascade, the Company or Sahara may, but is not
obligated to, seek the removal or otherwise satisfactorily resolve the
Burdensome Condition.

                (b) LITIGATION. No action, suit, litigation, proceeding or
investigation shall (i) have been formally instituted and be pending with regard
to the Merger, (ii) have been instigated with respect to any matter referred to
on SCHEDULE 3.14 or (iii) be threatened by any Governmental Authority with
regard to the Merger which, in any case, if resolved substantially in accordance
with plaintiff's demand, would be reasonably likely to have a Material Adverse
Effect on Cascade or Sahara. On the Closing Date, there shall not be in force
any order or decree restraining or enjoining consummation of the Merger or
placing any limitation upon such consummation or invalidating, suspending or
requiring modification of any provision of this Agreement.


                                      -30-
<PAGE>   32
                     Agreement and Plan of Merger -- Page 31


                (c) NASDAQ LISTING. The shares of Cascade Common to be issued
and exchanged for shares of Sahara Common and Sahara Preferred in the Merger
pursuant to this Agreement will, at the Effective Time, be authorized for
listing on the Nasdaq National Market.

                (d) TAX OPINION. Sahara shall have received a written opinion
from Shipman & Goodwin, in form and substance satisfactory to Sahara and Cascade
to the effect that the Merger will constitute a "reorganization" within the
meaning of Section 368(a) of the Code.

         7.2      CONDITIONS APPLICABLE TO CASCADE AND THE COMPANY. The 
obligations of Cascade and the Company under this Agreement to cause the 
Merger to be consummated are, at their option, subject to the satisfaction of 
the following conditions, in addition to the conditions contained in 
Section 7.1:

                (a) AGREEMENTS AND COVENANTS. Sahara shall have performed or
complied with all agreements and covenants required by this Agreement or the
Participation Agreement to be performed or complied with by Sahara on or prior
to the Closing Date, except where the failure to perform or comply could not
reasonably be expected to have a Material Adverse Effect.

                (b) ACCURACY OF REPRESENTATIONS AND WARRANTIES. The
representations and warranties of Sahara set forth in Article III shall be true
and correct both on the date of this Agreement and as of the Closing Date (as to
the truth and correctness of the representations and warranties qualified by
SCHEDULE 3.12(d) and SCHEDULE 3.14, as though such representations and
warranties were not so qualified) with the same force and effect as if such
representations and warranties were made anew at and as of the Closing Date,
except: (i) to the extent such representations and warranties are by their
express provisions made as of the date of this Agreement or another specified
date; (ii) for the effect of any activities or transactions which may have taken
place after the date of this Agreement which are contemplated by this Agreement;
and (iii) where the failure to be true and correct, individually or in the
aggregate, could not reasonably be expected to have a Material Adverse Effect.

                (c) NO MATERIAL ADVERSE CHANGE. Since the date of this 
Agreement, there shall have been no Material Adverse Effect on Sahara.

                (d) OFFICERS' CERTIFICATE CONCERNING THIS AGREEMENT. Sahara
shall have furnished to Cascade and the Company a certificate dated the Closing
Date, signed by its chief executive officer and its chief financial officer, to
the effect that the conditions set forth in Sections 7.2(a) through 7.2(c) have
been satisfied.

                (e) OPINION OF COUNSEL. Cascade and the Company shall have
received from Shipman & Goodwin, counsel to Sahara, an opinion dated the Closing
Date substantially in the form set forth in EXHIBIT G.

                (f) REQUIRED CONSENTS. The holders of any note, guarantee or
other evidence of indebtedness of Sahara, the lessors of any material real or
personal property or assets leased by Sahara, the parties (other than Sahara) to
any other material contract, commitment or agreement to which Sahara is a party,
and any other person (other than Governmental Authorities) which owns or has
authority to grant any franchise, license, permit, easement, rights or other
authorization necessary for the business or operations of Sahara, to the extent
that their consent or approval of the Merger or any other transactions
contemplated by this Agreement is required under the pertinent lease, contract,
commitment or agreement or other document or instrument or under applicable
laws, rules or regulations for the consummation of the transactions contemplated
hereby in the manner herein provided, shall have granted such consent or
approval and no Burdensome Condition shall exist. "BURDENSOME CONDITION" shall
mean the imposition of a material restriction on Cascade's or Sahara's ability
to operate Sahara following the Effective Time or requiring Cascade or Sahara to
dispose of a material amount of the assets of Sahara or Cascade or any of their
subsidiaries following the Effective Time. Any of Cascade, the Company or Sahara
may, but is not obligated to, seek the removal or otherwise satisfactorily
resolve the Burdensome Condition.


                                      -31-
<PAGE>   33
                     Agreement and Plan of Merger -- Page 32


                (g) APPRAISAL RIGHTS.  Holders of not more than 5% of the 
outstanding shares of Sahara Common and Sahara Preferred shall have exercised
appraisal rights pursuant to Section 262 of the Delaware Corporation Law

                (h) PERFORMANCE OF PARTICIPATION AGREEMENT. All the terms,
covenants and conditions of the Participation Agreement to be complied with and
performed by Sahara and the Major Stockholders on or before the Closing Date
shall have been fully complied with and performed, except where the failure to
perform or comply could not reasonably be expected to have a Material Adverse
Effect.

                (i) TERMINATION OF AGREEMENTS. All agreements among Sahara and
any of its securityholders or optionholders, or among any of the Sahara
securityholders or optionholders, providing for registration rights, rights of
first refusal, rights of co-sale, an adjustment to the number, or conversion or
exercise price, of any of the shares of capital stock of Sahara (other than an
adjustment as a result of a subdivision, combination, reorganization or
reclassification of the shares of capital stock of Sahara generally), relating
to the voting of Sahara securities or requiring Sahara to obtain the consent or
approval of any such securityholders prior to taking or failing to take any
action, including without limitation all of the Agreements listed in Section
5.2(k), shall have been terminated in their entirety or as provided in Section
5.2(k) effective upon or before the Effective Time.

                (j) TAX CERTIFICATE. Sahara shall have delivered to Cascade a
clearance certificate or similar document(s) which may be required by any tax
authority to relieve Cascade of any obligation to withhold Taxes in connection
with the transactions set forth in this Agreement. Sahara shall have paid any
sales, use, transfer and documentary Taxes and recording and filing fees
applicable to the transactions set forth in this Agreement. Sahara shall have
delivered to Cascade a properly executed statement satisfying the requirements
of Treasury Regulation Sections 1.897-2(h) and 1.1445-2(c)(3) in a form
reasonably acceptable to Cascade.

                (k) EMPLOYEE AGREEMENTS. All employees of Sahara who are
continuing as employees of the Surviving Corporation shall have executed
Cascade's standard form nondisclosure and developments agreement.

                (l) EMPLOYEES. None of Messrs. Reeves, Shea or Kraskey, no more
than ten percent (10%) of Sahara's engineers as of the date hereof and no more
than twenty percent (20%) of Sahara's employees as of the date hereof
(excluding, for purposes of such calculation, administrative and finance
personnel) shall have: (i) voluntarily terminated their employment with Sahara
on or prior to the Effective Time or (ii) refused to accept employment with, or
given notice that they do not intend to continue employment with, the Surviving
Corporation.

                (m) COMDISCO WARRANT. Comdisco, Inc. shall have exercised in
full the Warrant Agreement dated December 20, 1995 to purchase shares of Sahara
Common prior to the Effective Time, or other appropriate provision with respect
to such warrant shall be made to the reasonable satisfaction of Cascade.

                (n) PURCHASER REPRESENTATIVE. Sahara shall have entered into a
Purchaser Representative Agreement, in form and substance satisfactory to
Cascade and Sahara, with a purchaser representative who shall certify thereunder
that (i) he is familiar with the definition and qualifications of a "Purchaser
Representative" as set forth in Rule 501(h) of Regulation D promulgated by the
Securities and Exchange Commission under the Securities Act of 1933, as amended,
(ii) he meets the conditions applicable to a Purchaser Representative and is
qualified to act in such capacity in connection with this transaction, (iii) he
is not an affiliate, director, officer or other employee of either Cascade or
Sahara and (iv) he has such knowledge and experience in financial and business
matters that he is capable of evaluating the merits and risks of this
transaction.


                                      -32-
<PAGE>   34
                     Agreement and Plan of Merger -- Page 33


         7.3      CONDITIONS APPLICABLE TO SAHARA. The obligations of Sahara 
under this Agreement to cause the Merger to be consummated are, at its option, 
subject to the satisfaction of the following conditions, in addition to the 
conditions contained in Section 7.1:

                (a) AGREEMENTS AND COVENANTS. Cascade and the Company shall have
performed or complied with all agreements and covenants required by this
Agreement or the Participation Agreement to be performed or complied with by
them on or prior to the Closing Date, except where the failure to perform or
comply could not reasonably be expected to have a Material Adverse Effect.

                (b) ACCURACY OF REPRESENTATIONS AND WARRANTIES. The
representations and warranties of Cascade and the Company set forth in Article
IV shall have been true and correct on the date of this Agreement and as of the
Closing Date with the same force and effect as if such representations and
warranties were made anew at and as of the Closing Date, except: (i) to the
extent such representations and warranties are by their express provisions made
as of the date of this Agreement or another specified date; (ii) for the effect
of any activities or transactions which may have taken place after the date of
this Agreement which are contemplated by this Agreement and (iii) where the
failure to be true and correct, individually or in the aggregate, could not
reasonably be expected to have a Material Adverse Effect.

                (c) OFFICERS' CERTIFICATE CONCERNING THIS AGREEMENT. Cascade
shall have furnished to Sahara a certificate dated the Closing Date, signed by
the chief executive officer and the chief financial officer of Cascade, to the
effect that, the conditions set forth in Sections 7.3(a) through 7.3(b) hereof
have been satisfied.

                (d) NO MATERIAL ADVERSE CHANGE. Since the date of this
Agreement, there shall have been no Material Adverse Effect on Cascade and its
subsidiaries, taken as a whole.

                (e) OPINION OF COUNSEL. Sahara shall have received from counsel
to Cascade an opinion dated the Closing Date substantially in the form set forth
on EXHIBIT H.

                (f) REQUIRED CONSENTS. Cascade shall have received all consents
or approvals of the Merger or any other transactions contemplated by this
Agreement required under any material lease, contract, commitment, note,
guaranty or other evidence of indebtedness of Cascade or any of its
subsidiaries, or any lease of any material real property of Cascade and its
subsidiaries, or under applicable law for the consummation of the transactions
contemplated hereby.



                                  ARTICLE VIII

                                   TERMINATION

         8.1      TERMINATION. This Agreement may be terminated at any time 
prior to the Effective Time of the Merger, whether before or after approval of 
the Merger by the stockholders of Sahara:

                (a) by mutual written consent duly authorized by the Boards of
Directors of Cascade and Sahara;

                  (b) by either Sahara or Cascade, if the Merger shall not have
been consummated by February 15, 1997; PROVIDED, HOWEVER, that the right to
terminate this Agreement under this Section 8.1(b) shall not be available to any
party whose action or failure to act has been a principal cause of or resulted
in the failure of the Merger to occur on or before such date and such action or
failure to act constitutes a breach of this Agreement;


                                      -33-
<PAGE>   35
                     Agreement and Plan of Merger -- Page 34


                  (c) by either Sahara or Cascade, if a court of competent
jurisdiction or governmental, regulatory or administrative agency or commission
shall have issued an order, decree or ruling or taken any other action (an
"ORDER"), in any case having the effect of permanently restraining, enjoining or
otherwise prohibiting the Merger, which order, decree or ruling is final and
nonappealable;

                  (d) by Cascade, if the required approvals of the stockholders
of Sahara contemplated by this Agreement shall not have been obtained by reason
of the failure to obtain the required vote either upon a vote taken at a meeting
of stockholders duly convened therefor or at any adjournment thereof or by
written consent of the Stockholders;

                  (e) by Cascade, if Sahara shall have accepted an Acquisition
Proposal or if the Sahara Board of Directors recommends an Acquisition Proposal
to the stockholders of Sahara;

                  (f) by Cascade, if the Board of Directors of Sahara shall have
withheld, withdrawn or modified in a manner adverse to Cascade its
recommendation in favor of approving this Agreement and the consummation of the
Merger;

                  (g) by Cascade, if there shall have occurred a Material
Adverse Effect on Sahara since the date of this Agreement;

                  (h) by Sahara, if there shall have occurred a Material Adverse
Effect on Cascade and its subsidiaries taken as a whole since the date of this
Agreement

                  (i) by Cascade, upon breach of any representation, warranty,
covenant or agreement on the part of Sahara set forth in this Agreement, or if
any representation or warranty (as though the representations and warranties
qualified by SCHEDULE 3.12(d) and SCHEDULE 3.14 were not so qualified) of Sahara
shall have become untrue, in either case such that the conditions set forth in
Section 7.2(a) or Section 7.2(b) (including provisions with respect to Material
Adverse Effect) would not be satisfied as of the time of such breach or as of
the time such representation or warranty shall have become untrue, provided,
that if such inaccuracy in Sahara's representations and warranties or breach by
Sahara is curable by Sahara through the exercise of its commercially reasonable
efforts within ten (10) days of the time such representation or warranty shall
have become untrue or such breach, then Cascade may not terminate this Agreement
under Section 8.1(i) during such ten-day period provided Sahara continues to
exercise such commercially reasonable efforts or thereafter if cured;

                  (j) by Sahara, upon a breach of any representation, warranty,
covenant or agreement on the part of Cascade set forth in this Agreement, or if
any representation or warranty of Cascade shall have become untrue, in either
case such that the conditions set forth in Section 7.3(a) or Section 7.3(b)
(including provisions with respect to Material Adverse Effect) would not be
satisfied as of the time of such breach or as of the time such representation or
warranty shall have become untrue, PROVIDED, that if such inaccuracy in
Cascade's representations and warranties or breach by Cascade is curable by
Cascade through the exercise of its commercially reasonable efforts within ten
(10) days of the time such representation or warranty shall have become untrue
or such breach, then Sahara may not terminate this Agreement under this Section
8.1(j) during such ten-day period provided Cascade continues to exercise such
commercially reasonable efforts or thereafter if cured.

         8.2      NOTICE OF TERMINATION; EFFECT OF TERMINATION. Any termination
of this Agreement under Section 8.1 above will be effective immediately upon
the delivery of written notice of the terminating party to the other parties
hereto. In the event of the termination of this Agreement as provided in
Section 8.1, this Agreement shall be of no further force or effect, except (i)
as set forth in this Section 8.2, Sections 5.1(c), 5.1(d), 5.1(h), 8.3 and
Article X (Miscellaneous), each of which shall survive the termination of this
Agreement, and 


                                      -34-
<PAGE>   36
                     Agreement and Plan of Merger -- Page 35


(ii) nothing herein shall relieve any party from liability for any willful
breach of this Agreement. No termination of this Agreement shall affect the
obligations of the parties contained in the Nondisclosure Agreement, all of
which obligations shall survive termination of this Agreement in accordance with
their terms.

         8.3      PROCEDURE UPON TERMINATION. In the event of the termination 
of this Agreement, the Board or Boards of Directors so terminating may direct 
its or their officers not to file the certificate of merger in the office of 
the Secretary of State of the State of Delaware, notwithstanding favorable 
action by the stockholders of the Company and Sahara.


                                   ARTICLE IX

                            SURVIVAL; INDEMNIFICATION

         9.1      SURVIVAL. The covenants, agreements, representations and 
warranties of Sahara contained in this Agreement shall survive the Closing
until the first anniversary of the Effective Time, whereupon    they shall
terminate; PROVIDED that any such termination shall not terminate or limit in
any manner whatsoever any liabilities Sahara has or may have for knowing and
intentional misrepresentations, breaches, nonfulfillments and violations.
Notwithstanding the preceding sentence (other than the proviso), any claim or
liability regarding any covenant, agreement, representation or warranty arising
prior to the termination of the covenant, agreement, representation or warranty
in respect of which indemnity may be sought under Section 9.2(a) or (b) shall
survive such termination pursuant to the preceding sentence, if notice of the
inaccuracy or breach thereof giving rise to such right to indemnity shall have
been given to the party against whom such indemnity may be sought prior to such
time. The covenants, agreements, representations and warranties of Sahara and
the rights and remedies that may be exercised by any Indemnitee (as defined
below) shall not be limited, diminished or otherwise affected by or as a result
of any information that may have been provided, any investigation or
examination that may have or be made by, or any knowledge of, any Indemnitee or
any other party on the behalf of any Indemnitee.

         9.2      INDEMNIFICATION. (a) By their approval of this Agreement, the
stockholders of Sahara agree that the General Escrow Shares held under the
Escrow Agreement shall be available to indemnify, defend, protect, and hold
harmless each of Cascade and, effective at and as of the Effective Time, 
without duplication, the Surviving Corporation and each of their respective
subsidiaries and affiliates (each in its capacity as an indemnified party, an
"INDEMNITEE") at all times from and after the date of this Agreement from and
against all claims, damages, actions, suits, proceedings, demands, assessments,
adjustments, settlements, costs and expenses (net of income tax benefits to
such Indemnitee in the relevant year) (including specifically, but without
limitation, reasonable attorneys' fees and expenses of investigation)
(collectively "DAMAGES") incurred by such Indemnitee as a result of or arising
out of (i) any breach of any representation or warranty of Sahara or any of the
Major Stockholders set forth herein or in the Participation Agreement, or in
any certificate or other document delivered in connection herewith or therewith
(as such representation or warranty would read if all qualifications as to
knowledge and materiality and Material Adverse Effect were deleted from it and,
with respect to the representations and warranties qualified by SCHEDULE
3.12(d) and SCHEDULE 3.14, as though such representations and warranties were
not so qualified, such that any matter set forth in such Schedules are subject
to indemnification hereunder) with respect to which a claim for indemnification
is brought by an Indemnitee within the applicable survival period described in
Section 9.1, (ii) any breach or nonfulfillment by Sahara or any of the Major
Stockholders, or any noncompliance by Sahara or any of the Major Stockholders
with, any covenant, agreement, or obligation contained herein, in the
Participation Agreement, or in any certificate or other document delivered in
connection herewith except to the extent waived by Cascade, or (iii) any claim
by a stockholder or former stockholder of Sahara or any other person, firm,
corporation or entity, seeking to assert, or based upon: (A) ownership or
rights of ownership to any shares of capital stock of Sahara; (B) any rights of
the stockholder (other than the right to receive the Merger consideration
pursuant to this Agreement or appraisal rights under the applicable provisions
of the Delaware Corporation Law), including any option, preemptive rights, or
rights to


                                      -35-
<PAGE>   37
                     Agreement and Plan of Merger -- Page 36


notice or to vote; (C) any rights under the charter or bylaws of Sahara; or (D)
any claim that his, her or its shares were wrongfully repurchased by Sahara,
regardless of whether an action, suit or preceding can or has been made against
Sahara.

                  (b) By their approval of this Agreement, the stockholders of
Sahara named in SCHEDULE 1.8 agree that the Specific Escrow Shares held under
the Escrow Agreement shall be available to indemnify, defend, protect, and hold
harmless each Indemnitee at all times from and after the date of this Agreement
from and against all Damages incurred by such Indemnitee as a result of or
arising out of any breach of any representation or warranty of Sahara set forth
in Sections 3.08, 3.12 and 3.14 hereof concerning or related to any of the
parties named in SCHEDULE 3.14 (as such representation or warranty would read if
all qualifications as to knowledge and materiality and Material Adverse Effect
were deleted from it and, with respect to the representations and warranties
qualified by SCHEDULE 3.12(d)(2) and SCHEDULE 3.14, as though such
representations and warranties were not so qualified, such that any matter set
forth in such Schedules are subject to indemnification hereunder) with respect
to which a claim for indemnification is brought by an Indemnitee within the
applicable survival period described in Section 9.1; PROVIDED, HOWEVER, that any
claims with respect to any breach or misrepresentation of the representations or
warranties in Sections 3.08, 3.12 and 3.14 must be satisfied first from the
General Escrow Shares prior to satisfying claims for indemnification from the
Specific Escrow Shares.

         9.3      THIRD PERSON CLAIMS. Promptly after an Indemnitee has 
received notice of or has knowledge of any claim by a person not a party to
this Agreement ("THIRD PERSON") or the commencement of any action or    
proceeding by a Third Person, the Indemnitee shall, as a condition precedent to
a claim with respect thereto being made against the Escrow Agreement with
respect to the General Escrow Shares, give the Stockholder Representative
written notice of such claim or the commencement of such action or proceeding;
PROVIDED, HOWEVER that the failure to give such notice will not affect the
Indemnitees' right to indemnification hereunder with respect to such claim,
action or proceeding, except to the extent that the Stockholder Representative
has, or the stockholders have, been actually prejudiced as a result of such
failure. If the Stockholder Representative notifies the Indemnitee within 30
days from the receipt of the foregoing notice that he wishes to defend against
the claim by the Third Person and if the amount of the claim, if known,
together with all other claims made against the General Escrow Shares that have
not been settled, is less than the remaining balance of the General Escrow
Shares, then the Stockholder Representative shall have the right to assume and
control the defense of the claim by appropriate proceedings with counsel
reasonably acceptable to Indemnitee, and the Stockholder Representative shall
be entitled to reimbursement out of the General Escrow Shares for such defense.
The Indemnitee may participate in the defense, at its sole expense, of any such
claim for which the Stockholder Representative shall have assumed the defense
pursuant to the preceding sentence, provided that counsel for the Stockholder
Representative shall act as lead counsel in all matters pertaining to the
defense or settlement of such claims, suit or proceedings; PROVIDED, HOWEVER,
that Indemnitee shall control the defense of any claim or proceeding that in
Indemnitee's reasonable judgment could have a material and adverse effect on
Indemnitee's business apart from the payment of money damages. Under no
circumstances shall the Stockholder Representative be entitled to assume the
defense of any claim against the Specific Escrow Shares; PROVIDED, HOWEVER,
that the Stockholder Representative may participate in the defense, at its sole
expense, of any such claim provided that counsel to Cascade shall act as lead
counsel in all matters pertaining to the defense or settlement of such claims,
suit or proceedings. The Indemnitee shall be entitled to indemnification under
Section 9.2 for the reasonable fees and expenses of its counsel for any period
during which the Stockholder Representative has not assumed the defense of any
claim. Whether or not the Stockholder Representative shall have assumed the
defense of any claim, nether the Indemnitee nor the Stockholder Representative
shall make any settlement with respect to any such claim, suit or proceeding
without the prior consent of the other, which consent shall not be unreasonably
withheld or delayed. It is understood and agreed that in situations where
failure to settle a claim expeditiously could have an adverse effect on the
party wishing to settle, the failure of the party controlling the defense to
act upon a request for consent to such settlement within five business days of
receipt of notice thereof shall be deemed to constitute consent to such
settlement for purposes of this Article IX.


                                      -36-
<PAGE>   38
                     Agreement and Plan of Merger -- Page 37


         9.4  LIMITATIONS ON INDEMNIFICATION. No Indemnitee shall be entitled 
to indemnification under Section 9.2(a) and (b) for Damages relating to
breaches of representations and warranties set forth herein or in the
Participation Agreement or in any certificate or document delivered in
connection herewith or therewith all as provided in Section 9.2(a)(i)-(ii) and
9.2(b), until the aggregate amount of Damages incurred exceeds $500,000, in
which event such liability shall apply to all such Damages. The limitation
provided in this Section 9.4 on an Indemnitee's right to indemnification under
this Article IX shall not apply to Damages for any matters set forth in Section
9.2(a)(iii).

         9.5  EXCLUSIVITY; METHOD OF PAYMENT. Upon consummation of the Merger 
and except for claims based on knowing and intentional misrepresentations,      
breaches, nonfulfillments and violations, Cascade's and the Surviving
Corporation's sole recourse to satisfy any claims for indemnification pursuant
to Section 9.2(a) shall be to the General Escrow Shares, and no Indemnitee
shall be entitled to seek to recover any Damages under Section 9.2(a) from the
assets of stockholders of Sahara other than the General Escrow Shares. Upon
consummation of the Merger and except for claims based on knowing and
intentional misrepresentations, breaches, nonfulfillments and violations,
Cascade's and Surviving Corporation's sole recourse to satisfy claims for
indemnification pursuant to Section 9.2(b) shall be to the Escrow Shares, and
no Indemnitee shall be entitled to seek to recover any Damages under Section
9.2(b) from assets of stockholders of Sahara other than all of the Escrow
Shares. To the extent that Cascade, or the Surviving Corporation makes a claim
against the Escrow Shares pursuant to the Escrow Agreement, and such claim is
paid in shares of Cascade Common, then for purposes of such payment, the shares
of Cascade Common shall be valued at the Average Cascade Price.

         9.6  NO CONTRIBUTION. The stockholders of Sahara acknowledge and agree
that they shall not have and shall not exercise or assert any right of
contribution, indemnification, subrogation or other remedy or right against the
Surviving Corporation in connection with any indemnification obligation or other
liability to which they may become subject under or in connection with this
Agreement, the Participation Agreement or any certificate or other document
delivered in connection herewith or therewith.


                                    ARTICLE X

                                  MISCELLANEOUS

         10.1 OTHER REMEDIES; SPECIFIC PERFORMANCE. Except as set forth in 
Section 9.5, any and all remedies herein expressly conferred upon a party will  
be deemed cumulative and not exclusive of any other remedy conferred hereby, or
by law or equity upon such party, and the exercise by a party of any one remedy
will not preclude the exercise of any other remedy. The parties hereto agree
that irreparable damage would occur in the event that any of the provisions of
this Agreement were not performed in accordance with their specific terms or
were otherwise breached. It is accordingly agreed that the parties shall be
entitled to an injunction or injunctions to prevent breaches of this Agreement
and to enforce specifically the terms and provisions hereof in any court of the
United States or any state having jurisdiction, this being in addition to any
other remedy to which they are entitled at law or in equity.

         10.2 EXPENSES. All fees and expenses (including all accounting, legal 
and investment banking fees and expenses and all other  expenses) incurred by
Cascade and the Company in connection with this Agreement and the transactions
contemplated hereby will be borne by Cascade. All fees and expenses (including
without limitation all accounting, legal and investment banking fees and
expenses) incurred by Sahara in connection with this Agreement and the
transactions contemplated hereby will be borne by the Surviving Corporation or,
if the Merger does not occur, Sahara.

         10.3 FURTHER ASSURANCES. If at any time after the Effective Time, 
Cascade or the Company shall consider it advisable that any further     
conveyance, agreements, documents, instruments and assurances of law or



                                      -37-
<PAGE>   39
                     Agreement and Plan of Merger -- Page 38


any other things are necessary or advisable to vest, perfect, confirm or record
in the Surviving Corporation the title to any property, rights, privileges,
powers and franchises of Sahara, the officers of Sahara last in office and such
other persons, if any, as the Board of Directors of Sahara last in office may
authorize shall, at Cascade's expense, execute and deliver, upon Cascade's or
the Company's reasonable request, any and all proper conveyances, agreements,
documents, instruments and assurances of law, in a form acceptable to counsel to
such officers or other persons (at such officer's or other person's expense) and
do all things reasonably necessary or proper to vest, perfect, confirm or record
title to such property, rights, privileges, powers and franchises in the
Surviving Corporation, and otherwise to carry out the provisions of this
Agreement.

         10.4 PARTIES IN INTEREST. All the terms and provisions of this 
Agreement shall be binding upon, shall inure to the benefit of and shall be
enforceable by the respective successors and permitted assigns  of the parties
hereto. Nothing expressed or implied in this Agreement is intended or shall be
construed to confer upon or give any person, firm or corporation other than the
parties hereto, their permitted successors or assigns, and their respective
stockholders any rights or remedies under or by reason of this Agreement or any
transaction contemplated hereby.

         10.5 ENTIRE AGREEMENT. This Agreement, the Participation Agreement, 
the Registration Rights Agreement, the Escrow Agreement, the Nondisclosure
Agreement, and the Noncompetition Agreements    together with the Schedules and
Exhibits hereto and thereto, supersede any other agreement, whether written or
oral, that may have been made or entered into by Cascade and Sahara (or by any
officer or officers of such parties) relating to the matters contemplated
hereby or thereby. This Agreement, the Participation Agreement, the
Registration Rights Agreement, the Nondisclosure Agreement, the Escrow
Agreement and the Noncompetition Agreements, together with the Schedules and
Exhibits hereto and thereto, constitute the entire agreement by the parties,
and there are no agreements or commitments except as set forth herein and
therein.

         10.6 AMENDMENT OR MODIFICATION. At any time before or after the 
adoption of this Agreement by the stockholders of Sahara, this Agreement may be 
amended or supplemented by additional agreements, articles or certificates, as
may be mutually agreed by the parties hereto to be necessary, desirable or
expedient to further the purposes of this Agreement, or to clarify the
intention of the parties hereto, or to add to or to modify the covenants, terms
or conditions hereof or to effect or facilitate any governmental approval or
acceptance of the Merger or of this Agreement or to effect or facilitate the
filing or recording of this Agreement or the consummation of any of the
transactions contemplated hereby.

         10.7 WAIVER. Any party to this Agreement may, by written notice to the
other parties to this Agreement, (a) extend the time for the performance of
any of the obligations or other actions of the other parties under this
Agreement, (b) waive any inaccuracies in the representations or warranties of
the other parties contained in this Agreement or in any document delivered
pursuant to this Agreement, (c) waive compliance with any of the conditions or
covenants of the other parties contained in this Agreement, or (d) waive or
modify performance of any of the obligations of the other parties under this
Agreement. Except as provided in the preceding sentence or as expressly
provided in this Agreement, no action taken pursuant to this Agreement,
including without limitation any investigation by or on behalf of any party,
shall be deemed to constitute a waiver by the party taking such action of
compliance with any representations, warranties, covenants, conditions or
agreements contained in this Agreement. The failure of any party hereto to
enforce at any time any of the provisions of this Agreement shall in no way be
construed to be a waiver of any such provision, nor in any way to affect the
validity of this Agreement or any part hereof or the right of such party
thereafter to enforce each and every such provision. No waiver of any breach of
or non-compliance with this Agreement shall be held to be a waiver of any other
or subsequent breach or non-compliance.

         10.8 ASSIGNABILITY. This Agreement shall not be assignable by Sahara,
on the one hand, or Cascade or the Company, on the other hand, without the 
prior written consent of Cascade, on the one hand, or Sahara, on the other 
hand, as the case may be.


                                      -38-
<PAGE>   40
                     Agreement and Plan of Merger -- Page 39


         10.9     CERTAIN DEFINITIONS. For purposes of this Agreement, the 
following terms shall have the meanings set forth below:

                (a) "AFFILIATE" shall mean, when used with respect to a
specified person, another person that directly, or indirectly through one or
more intermediaries, controls or is controlled by or is under common control
with the person specified;

                (b) "AVERAGE CASCADE PRICE" means the average price of a Cascade
share (rounded to the nearest penny), for the ten consecutive trading days
ending on and including the second trading day preceding the Effective Time
calculated on the basis of the last reported sales prices of Cascade shares on
the Nasdaq Stock Market on such trading days.

                (c) "CONTROL" (including, with its correlative meanings,
"CONTROLLED BY" and "UNDER COMMON CONTROL WITH") shall mean possession, directly
or indirectly, of power to direct or cause the direction of management or
policies (whether through ownership of securities or partnership or other
ownership interests, by contract or otherwise);

                (d) "MATERIAL ADVERSE EFFECT" shall mean, when used with respect
to Sahara, on the one hand, and Cascade and its subsidiaries, taken as a whole,
on the other hand, as the case may be, any change, effect or circumstance that,
individually or when taken together with all other such changes, effects or
circumstances that have occurred prior to the date of determination of the
Material Adverse Effect, is or could reasonably be materially adverse to the
financial condition, business, properties, intellectual property rights, assets
or operations of Sahara or Cascade and its subsidiaries, taken as a whole, as
the case may be; PROVIDED, HOWEVER, that the following shall not be considered a
Material Adverse Effect: any adverse effect that primarily results from the
execution and delivery of this Agreement or from changes in Sahara's or
Cascade's respective industry or the financial markets.

                (e) "PERSON" shall mean any individual, corporation,
partnership, limited liability company, trust, joint venture, unincorporated
association, Governmental Authority or other entity; and

                (f) "SUBSIDIARY" of any person shall mean a corporation, company
or other entity (i) more than 50% of whose outstanding shares or securities
(representing the right to vote for the election of directors or other managing
authority) are, or (ii) which does not have outstanding shares or securities (as
may be the case in a partnership, limited liability company, joint venture or
unincorporated association), but more than 50% of whose ownership interest
representing the right to make decisions for such other entity is, now or
hereafter owned or controlled, directly or indirectly, by such person.

         10.10    HEADINGS AND INTERPRETATION. The headings contained in this 
Agreement are for reference purposes only and   shall not affect the meaning or
interpretation of this Agreement. Terms such as "herein," "hereof" and
"hereinafter" refer to this Agreement as a whole and not to the particular
sentence or paragraph where they appear, unless the context otherwise requires.
Whenever the words "include," "includes" or "including" are used in this
Agreement they shall be deemed to be followed by the words "without
limitation." The phrase "made available" in this Agreement shall mean that the
information referred to has been made available if requested by the party to
whom such information is to be made available. Unless the context otherwise
requires, (i) terms used in the plural include the singular, and vice versa,
and (ii) words in the masculine gender include the feminine or neuter, and vice
versa.

         10.11    NOTICES. All notices and other communications under this 
Agreement shall be in writing and shall be delivered by hand or overnight
courier service, mailed or sent by telex, graphic scanning or other telegraphic
communications equipment of the sending party, as follows:


                                      -39-
<PAGE>   41
                     Agreement and Plan of Merger -- Page 40


        If to Cascade or the Company:

                Cascade Communications Corp.
                5 Carlisle Road
                Westford, Massachusetts  01886
                Attention: Paul E. Blondin, Chief Financial Officer

                with a copy to:

                Testa, Hurwitz & Thibeault, LLP
                High Street Tower
                125 High Street
                Boston, Massachusetts  02110
                Attention:  John A. Meltaus, Esq.

        If to Sahara:

                Sahara Networks, Inc.
                860 North Main Street
                Wallingford, Connecticut  06492
                Attention:  W. Thomas Shea

                with a copy to:

                Ropes and Gray
                One International Place
                Boston, MA 02110
                Attention:  Gregory Moore, Esq.

                and

                Shipman & Goodwin
                One American Row
                Hartford, Connecticut 06103
                Attention:  Frank Marco, Esq.

or to such other address as any party may have furnished to the others in
writing in accordance herewith, except that notices of change of address shall
only be effective upon receipt. All notices and other communications given to
any party hereto in accordance with the provisions of this Agreement shall be
deemed to have been given on the date of receipt if delivered by hand or
overnight courier service or sent by telex, graphic scanning or other
telegraphic communications equipment of the sender, or on the date five business
days after dispatch by certified or registered mail if mailed, in each case
delivered, sent or mailed (properly addressed) to such party as provided in this
Section 10.11 or in accordance with the latest unrevised direction from such
party given in accordance with this Section 10.11.

         10.12 LAW GOVERNING. This Agreement shall be governed by and construed
and enforced in accordance with the laws of the State of Delaware, without 
giving effect to the principles of conflicts of law thereof.

                                      -40-
<PAGE>   42
                     Agreement and Plan of Merger -- Page 41


         10.13 INVALIDITY OF PROVISIONS. Each of the provisions contained in 
this Agreement is distinct and severable and a  declaration of invalidity or
unenforceability of any such provision or part thereof by a court of competent
jurisdiction shall not affect the validity or enforceability of any other
provision hereof. The parties agree to replace such invalid or unenforceable
provision of this Agreement with a valid and enforceable provision that will
achieve, to the extent possible, the economic, business and other purposes of
such invalid or unenforceable provision.

         10.14 COUNTERPARTS. This Agreement may be executed simultaneously 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 instrument.

         10.15 CONSENT TO JURISDICTION. Each of Sahara, Cascade and the 
Company hereby irrevocably submits to the exclusive jurisdiction of any state
or federal court in the State of Delaware over any suit, action or proceeding
brought against it by any of the other parties hereto and arising out of or
relating to this Agreement and the transactions contemplated hereby.



                                      -41-

<PAGE>   43

                   Agreement and Plan of Merger -- Page 42


        IN WITNESS WHEREOF, this Agreement has been duly executed and delivered
by the parties on the date first above written.

                                             CASCADE COMMUNICATIONS CORP.


Attest:

_____________________________                By: __________________________
Name:                                            Name:
Title:                                           Title:

                                             CAMEL ACQUISITION CORPORATION


Attest:

_____________________________                By: __________________________
Name:                                            Name:
Title:                                           Title:

                                             SAHARA NETWORKS, INC.


Attest:

_____________________________                By: __________________________
Name:                                            Name:
Title:                                           Title:





                                      -42-



<PAGE>   1



                                                                    EXHIBIT 99.1


                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                           Index to Financial Statements
<CAPTION>





<S>                                                                                             <C>
Report of Independent Auditors...................................................................1

Audited Financial Statements for the period from May 25, 1995 (inception) to
December 31, 1995

Balance Sheet....................................................................................2
Statement of Operations..........................................................................3
Statement of Stockholders' Deficit...............................................................4
Statement of Cash Flows..........................................................................5
Notes to Financial Statements....................................................................6

Unaudited Financial Statements for the nine months ended September 30, 1996 and
the period from May 25, 1995 (inception) to September 30, 1995

Balance Sheets..................................................................................11
Statements of Operations........................................................................12
Statements of Shareholders' Deficit.............................................................13
Statements of Cash Flows........................................................................14
Notes to Unaudited Financial Statements.........................................................15
</TABLE>



<PAGE>   2


                                       -1-







                         Report of Independent Auditors



Stockholders and Board of Directors
Sahara Networks, Inc.

We have audited the accompanying balance sheet of Sahara Networks, Inc., a
development stage enterprise, as of December 31, 1995, and the related
statements of operations, stockholders' deficit, and cash flows for the period
from May 25, 1995 (inception) to December 31, 1995. These financial statements
are the responsibility of the Company's management. Our responsibility is to
express an opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the 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 audit provides 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 Sahara Networks, Inc. at
December 31, 1995, and the results of its operations and its cash flows for the
period from May 25, 1995 (inception) to December 31, 1995, in conformity with
generally accepted accounting principles.

                                                 /s/ Ernst & Young LLP



Hartford, Connecticut 
January 5, 1996, except for Note 8, 
as to which the date is October 8, 1996, 
and for Note 9 as to which the date is 
January 2, 1997


                                                                               1

<PAGE>   3
                                      -2-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                                       Balance Sheet

                                                     December 31, 1995
<CAPTION>



<S>                                                                                 <C>       
ASSETS
Current assets:
   Cash and cash equivalents                                                        $2,621,879
   Other assets                                                                          5,521
                                                                                    ----------
Total current assets                                                                 2,627,400

Property and equipment:
   Furniture and fixtures                                                               22,445
   Office equipment                                                                    100,455
   Technical equipment                                                                 165,040
   Leasehold improvements                                                                3,056
                                                                                    ----------
                                                                                       290,996
Less accumulated depreciation                                                          (27,340)
                                                                                    ----------
                                                                                       263,656
Other assets:
   Organization costs, net of accumulated amortization of $693                           6,565

                                                                                    ----------
Total assets                                                                        $2,897,621
                                                                                    ==========

LIABILITIES AND STOCKHOLDERS' DEFICIT 
Current liabilities:
   Accounts payable                                                                 $   74,267
   Accrued liabilities                                                                  12,000
   Capital lease obligations                                                            12,929
                                                                                    ----------
Total current liabilities                                                               99,196

Capital lease obligations                                                               27,851
Series A redeemable preferred stock - $.99 par value; 3,650,000 shares
   authorized; 3,636,000 shares issued and outstanding, net of stock
   subscription receivable                                                           3,534,157

Stockholders' deficit:
   Common stock - $.01 par value; 20,000,000 shares authorized; 12,674,250 shares
     issued and outstanding                                                            126,158
   Stock subscription receivable                                                          (100)
   Deficit accumulated during development stage                                       (889,641)
                                                                                    ----------
Total stockholders' deficit                                                           (763,583)
                                                                                    ----------
Total liabilities and stockholders' deficit                                         $2,897,621
                                                                                    ==========
</TABLE>


See accompanying notes.

                                                                               2
<PAGE>   4
                                      -3-


                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                             Statement of Operations

        For the period from May 25, 1995 (inception) to December 31, 1995
<CAPTION>




<S>                                                                 <C>        
Product development expenses                                        $ (464,184)
Sales and marketing expenses                                          (111,168)
General and administrative expenses                                   (269,222)
                                                                    ----------
Loss from operations                                                  (844,574)

Other income (expense):
   Interest income                                                      30,029
   Interest expense                                                     (4,683)
                                                                    ----------
Net loss                                                            $ (819,228)
                                                                    ==========

Net loss per common share                                           $     (.09)
                                                                    ==========

Average outstanding common shares                                    9,074,893
                                                                    ==========

</TABLE>

See accompanying notes.

                                                                               3
<PAGE>   5
                                      -4-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                         Statement of Stockholders' Deficit

                                                 December 31, 1995
<CAPTION>

                                                                                                                
                                                                                                           Deficit  
                                                                                                        Accumulated
                                                                      Common Stock            Stock        During   
                                                                  --------------------    Subscription  Development
                                                                     Shares  Par Value     Receivable       Stage        Totals
                                                                  ---------------------------------------------------------------

<S>                                                               <C>         <C>             <C>         <C>          <C>      
Issuance of common stock to officers upon organization             1,847,000  $ 18,470                                 $  18,470

Issuance of common and preferred stock in exchange for
   $1,751,500 and extinguishment of $250,000 bridge loan,
   net of expenses                                                 2,150,000    21,157                                    21,157

Net proceeds from issuance of common stock                         1,400,000    13,768                                    13,768

Net proceeds from issuance of common stock                           226,000     2,250                                     2,250

Subscription of 10,000 shares of common stock                         10,000       100        $(100)                           -

Net loss                                                                                                  $(819,228)    (819,228)

Effect of three-for-two stock splits                               7,041,250    70,413                      (70,413)           -
                                                                  ---------------------------------------------------------------

Balances at December 31, 1995                                     12,674,250  $126,158        $(100)      $(889,641)   $(763,583)
                                                                  ===============================================================

</TABLE>

See accompanying notes.

                                                                               4
<PAGE>   6
                                      -5-


                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                              Statement of Cash Flows

                         For the period from May 25, 1995 (inception) to December 31, 1995
<CAPTION>



<S>                                                                                             <C>        
OPERATING ACTIVITIES
Net loss                                                                                        $ (819,228)
Adjustments to reconcile net loss to net cash used in operating activities:
   Depreciation                                                                                     27,340
   Amortization                                                                                        693
   Changes in assets and liabilities:
     Organization costs                                                                             (7,258)
     Accounts payable                                                                               74,267
     Accrued liabilities                                                                            12,000
     Other assets                                                                                   (5,521)
                                                                                                ----------
Net cash used in operating activities                                                             (717,707)

INVESTING ACTIVITIES
Purchase of property and equipment, net                                                           (247,577)
                                                                                                ----------
Net cash used in investing activities                                                             (247,577)

FINANCING ACTIVITIES
Net proceeds from the issuance of common stock                                                      53,145
Net proceeds from the issuance of redeemable preferred stock                                     3,286,657
Proceeds from the issuance of debt converted into capital stock                                    250,000
Repayment of capital lease obligation                                                               (2,639)
                                                                                                ----------
Net cash provided by financing activities                                                        3,587,163
                                                                                                ----------

Increase in cash and cash equivalents                                                            2,621,879
Cash at beginning of the period                                                                          -
                                                                                                ----------
Cash at end of the period                                                                       $2,621,879
                                                                                                ==========

SUPPLEMENTAL INFORMATION
Interest paid                                                                                   $    4,683
                                                                                                ==========
</TABLE>


See accompanying notes.

                                                                               5
<PAGE>   7
                                      -6-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                          Notes to Financial Statements



1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS

The Company is a development stage enterprise incorporated in Delaware on May
25, 1995. The Company is in the process of designing, manufacturing and
marketing integrated broadband access products for communications services based
on Asynchronous Transfer Mode (ATM) technology. These products are intended to
serve multiple markets focusing on Local Exchange Carriers, Interexchange
Carriers, Competitive Access Providers, foreign Post and Telecommunications
Authorities and large information intensive end users.

The financial statements are prepared in conformity with generally accepted
accounting principles applicable to a development stage company.

It is management's opinion that the current financial performance is a result of
the start-up of operations and is not permanent. If there are delays in bringing
the Company's products to market, there could be a substantial effect on the
Company. Until operations provide adequate cash flow, the Company intends to
meet it cash requirements through raising additional capital (see Note 8).

PROPERTY AND EQUIPMENT

Property and equipment are stated at cost. Depreciation is computed using the
straight-line method over estimated useful lives of three to five years.
Depreciation expense for 1995 was $27,340 including all leased machinery and
equipment.

ORGANIZATION COSTS

The Company has capitalized the costs of its organization and is amortizing such
costs over five years using a straight-line method.

CASH AND CASH EQUIVALENTS

The Company maintains checking and money market accounts which are fully liquid
in nature. The Company does not hold any instruments which would not become
liquid within 90 days or less from the date of acquisition.

NET LOSS PER COMMON SHARE

Net loss per common share is based on the weighted average number of shares of
Common Stock outstanding during the year. Common stock equivalents are not
included in the computation as their effect would be antidilutive. All common
and per common share amounts have been restated to reflect the stock splits
described in Note 8.

INCOME TAXES

Income taxes have been provided using the liability method in accordance with
Statement of Financial Accounting Standard ("SFAS") No. 109, Accounting for
Income Taxes.


                                                                               6
<PAGE>   8
                                      -7-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                    Notes to Financial Statements (continued)



1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

RESEARCH AND DEVELOPMENT COSTS

The Company's research and development costs are expensed as incurred in
accordance with SFAS No. 2, Accounting for Research and Development Costs.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes.
Actual results could differ from those estimates.

2. CAPITAL STOCK

The Company is authorized to issue 20,000,000 shares of common stock, par value
of $.01 per share and 3,650,000 shares of preferred stock, par value $.99 per
share designated as Series A Redeemable Preferred Stock ("Series A Preferred").
The shares of common stock are entitled to one vote per share. The Company
cannot declare or pay dividends on the common stock without the consent of a
majority of the Series A Preferred shareholders.

Holders of the Series A Preferred are entitled to dividends when and if declared
by the Board of Directors. The Series A Preferred is non-voting and is
redeemable at par value plus any declared and unpaid dividends, at a rate of
one-third of the outstanding shares on each of August 25, 2001, 2002 and 2003 or
in full on a change in control or initial public offering of the Company's
equity securities ("IPO"). The Series A Preferred has a liquidation preference
equal to par value plus any declared and unpaid dividends.

In May 1995, the three founding officers ("Founders") of the Company contributed
a total of $18,470 for 1,847,000 shares (4,155,750 shares after reflecting the
stock splits) of common stock. Under the terms of the shareholders agreement the
Founders cannot sell their common stock before August 1997. For the next eight
years, or until an IPO, first the Company, then the remaining Founders, have a
right of first refusal to purchase any shares being sold by any Founder. In the
event a Founder leaves the Company, the Company has an option to repurchase
shares owned by the Founder for $.01 per share. At December 31, 1995, the
Company's option extends to approximately 73% of the shares owned by each
Founder, decreasing ratably to zero by August 1999.

In June and August 1995, the Company received $1,500 and $1,750,000,
respectively, from a venture capital firm in exchange for 2,000,000 shares of
Series A preferred stock, 2,150,000 shares (4,837,500 shares after reflecting
the stock splits) of common stock, and the extinguishment of a $250,000 bridge
loan provided to the Company by the venture capital firm.

In October 1995, the Company received $1,400,000 from a second venture capital
firm in exchange for 1,400,000 shares of Series A preferred stock and 1,400,000
shares (3,150,000 shares after reflecting the stock splits) of common stock. The
Company also received $226,000 from various investors, including two officers,
in exchange for 226,000 shares of Series A preferred stock and 226,000 shares
(508,500 shares after reflecting the stock splits) of common stock.



                                                                               7
<PAGE>   9
                                      -8-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                    Notes to Financial Statements (continued)




2. CAPITAL STOCK (CONTINUED)

In October 1995, the Company agreed to issue 10,000 shares of Series A preferred
stock and 10,000 shares (22,500 shares after reflecting the stock splits) of
common stock. Accordingly, the Company has recorded a stock subscription
receivable of $10,000.

3. STOCK OPTIONS

The Company's 1995 Stock Plan (the "Plan") provides for the granting of
Incentive Stock Options ("ISO"), Non-Qualified Options ("NQO") and other awards
to employees, directors, officers and consultants up to an aggregate of
1,353,000 shares (3,044,250 shares after reflecting the stock splits) of common
stock. The exercise price of the options shall be no less than 100% for ISOs and
50% for NQO's respectively, of the fair market value on the date of grant as
determined by the Board of Directors. The exercisability of the options is
determined on an individual grant basis by the Board of Directors, however, no
options can be exercisable prior to six months from the date of grant.

During 1995, the Company granted 365,000 options (821,250 options after
reflecting the stock splits) at an option price of $.01 per share, the fair
market value on the date of grant as determined by the Board of Directors.

At December 31, 1995, none of the outstanding options are exercisable. Options
as to 335,000 shares (753,750 shares after reflecting the stock splits) become
exercisable as to 20% of the shares in 1996 and an additional 20% per year over
the next four years. Options as to an additional 30,000 shares (67,500 shares
after reflecting the stock splits) become exercisable at 10,000 shares (22,500
shares after reflecting the stock splits) per year beginning in 1996 in
conjunction with a non-qualified stock option agreement entered into by the
Company.

The Company accounts for options under Accounting Principles Board Opinion No.
25, "Accounting for Stock Issued to Employees" and will continue to do so.

4. INCOME TAXES

<TABLE>
The Company's deferred tax asset is as follows as of December 31, 1995:
<CAPTION>

          <S>                                                   <C>
          Deferred tax asset
             Net operating loss carryforwards                   $ 370,600
             Valuation allowance                                 (370,600)
                                                                --------- 
          Net deferred tax asset                                $       -
                                                                =========
</TABLE>

At December 31, 1995, the Company had available for federal income tax purposes,
a net operating loss carryforward of approximately $819,000 expiring in 2010,
that may be used to offset future federal taxable income. The difference between
the deficit accumulated during the development stage for financial reporting
purposes and the net operating loss carryforward for tax purposes is primarily
due to certain general and administrative expenses which are not currently
deductible for tax purposes. The Company has provided a valuation reserve
against the full amount of the net operating loss tax benefit of $278,500 since
the likelihood of realization cannot be determined. The ability of the Company
to realize a future tax benefit from a portion of its net operating
carryforwards is severely limited due to changes in ownership of the Company.


                                                                               8
<PAGE>   10
                                      -9-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                    Notes to Financial Statements (continued)



4. INCOME TAXES (CONTINUED)

The Company also has available for state income tax purposes, a net operating
loss tax benefit of approximately $92,100 which is offset by a valuation
reserve.

5. OPERATING LEASES

The Company leases office space for its Cheshire, Connecticut headquarters. Rent
expense totaled $14,070 from inception through December 31, 1995. Minimum future
rental payments under noncancelable leases at December 31, 1995 are as follows:
1996--$33,650.

6. CAPITAL LEASES

The Company leases office equipment and machinery used in the development of
products. The minimum future lease obligations under noncancelable leases at
December 31, 1995 using imputed interest rates of 18.6% and 13% respectively,
are as follows: 1996--$12,929, 1997--$14,626, 1998--$13,225, and zero
thereafter.

7. DEFINED CONTRIBUTION PLAN

The Company offers a defined contribution plan in the form of a 401K plan. All
employees with at least three months of service and who are 21 years of age are
eligible to participate in the Plan. The Company is not obligated to make
contributions to the Plan. Employees may make contributions through payroll
deductions up to 14% of their salary. The Company did not make any contributions
for the year ended December 31, 1995.

8. SUBSEQUENT EVENTS

In March 1996, the Company entered into a financing arrangement with an outside
investor group in which the Company received $325,000 in exchange for an
unsecured loan with an interest rate of 14%. The Company received an additional
$350,000 in exchange for a loan secured by equipment with an interest rate of
8%. In connection with the financing arrangement, the Company has issued to this
investor group warrants to purchase 72,000 shares of common stock at $.67 per
share. The Company also has the right to draw an additional $300,000 under the
secured loan agreement by December 31, 1996.

In April and October 1996, the Company's Board of Directors declared
three-for-two splits of its Common Stock effective immediately prior to the
effectiveness of the Company's Amended and Restated Certificate of Incorporation
related to the authorization and issuance of Series B Participating Convertible
Preferred Stock and Series C Convertible Preferred Stock, respectively.
Accordingly, the financial statements and all common and per common share data
have been retroactively adjusted to reflect the increase in authorized common
shares and the stock splits. The par value of the additional shares of common
stock issued in connection with the stock splits was credited to Common Stock
and charged to Deficit Accumulated During Development Stage.


                                                                               9
<PAGE>   11
                                      -10-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                    Notes to Financial Statements (continued)



9. ACQUISITION OF THE COMPANY

On January 2, 1997, the Company signed an agreement with Cascade Communications
Corp. ("Cascade"), whereby Cascade will purchase the Company in exchange for 3.8
million shares of Cascade's common stock. The transaction is subject to, among
other matters, the approval of the shareholders of the Company.




                                                                              10
<PAGE>   12
                                      -11-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                                   Balance Sheets
<CAPTION>

                                                                                         SEPTEMBER 30,           DECEMBER 31,
                                                                                             1996                   1995
                                                                                         ------------------------------------
                                                                                          (Unaudited)
<S>                                                                                       <C>                    <C>       
ASSETS
Current assets:
   Cash and cash equivalents                                                              $ 1,881,155            $2,621,879
   Prepaid expenses                                                                           129,332                     -
   Other assets                                                                               112,007                 5,521
                                                                                          ---------------------------------
Total current assets                                                                        2,122,494             2,627,400

Property and equipment:
   Furniture and fixtures                                                                      80,211                22,445
   Office equipment                                                                           396,202               100,455
   Technical equipment                                                                        582,480               165,040
   Leasehold improvements                                                                      52,706                 3,056
                                                                                          ---------------------------------
                                                                                            1,111,599               290,996
Less accumulated depreciation                                                                (170,365)              (27,340)
                                                                                          ---------------------------------
                                                                                              941,234               263,656
Other assets:
   Organization costs, net of accumulated amortization of
     $1,782 and $693                                                                            5,476                 6,565
                                                                                          ---------------------------------
Total assets                                                                              $ 3,069,204            $2,897,621
                                                                                          =================================

LIABILITIES AND STOCKHOLDERS' DEFICIT 
Current liabilities:
   Accounts payable                                                                       $   676,242            $   74,267
   Accrued liabilities                                                                         40,000                12,000
   Capital lease obligations                                                                  138,082                12,929
   Note payable                                                                                91,490                     -
                                                                                          ---------------------------------
Total current liabilities                                                                     945,814                99,196

Note payable                                                                                  177,334                     -
Capital lease obligations                                                                     387,613                27,851
Series A redeemable preferred stock - $.99 par value; 3,636,000 shares
   authorized, issued and outstanding, net of stock subscription receivable in
   1995
                                                                                            3,544,057             3,534,157
Series B redeemable participating convertible preferred stock - $.01 par value;
   1,312,500 shares authorized; 1,311,842 shares issued and outstanding
                                                                                            3,484,261                     -

Stockholders' deficit:
   Common stock - $.01 par value; 20,000,000 shares authorized; 12,674,250 shares
     issued and outstanding                                                                   126,158               126,158
   Additional paid-in capital                                                                 440,100                     -
   Unearned compensation                                                                     (418,693)                    -
   Stock subscriptions receivable                                                                   -                  (100)
   Deficit accumulated during development stage                                            (5,617,440)             (889,641)
                                                                                          ---------------------------------
Total stockholders' deficit                                                                (5,469,875)             (763,583)
                                                                                          ---------------------------------
Total liabilities and stockholders' deficit                                               $ 3,069,204            $2,897,621
                                                                                          =================================
</TABLE>

See accompanying notes.

                                                                              11
<PAGE>   13
                                      -12-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                              Statements of Operations
<CAPTION>




                                                                                             
                                                                      FOR THE PERIOD         FOR THE PERIOD   
                                              NINE MONTHS ENDED     FROM  MAY 25, 1995     FROM MAY 25, 1995  
                                                  SEPTEMBER           (INCEPTION) TO      (INCEPTION) THROUGH 
                                                  30, 1996          SEPTEMBER 30, 1995     SEPTEMBER 30, 1996 
                                              ---------------------------------------------------------------
                                                 (Unaudited)          (Unaudited)             (Unaudited)

<S>                                              <C>                  <C>                    <C>         
Product development expenses                     $(3,281,537)         $ (137,063)            $(3,745,721)
Sales and marketing expenses                        (657,328)            (50,311)               (768,496)
General and administrative expenses                 (853,932)           (102,262)             (1,123,154)
                                                 -------------------------------------------------------
Loss from operations                              (4,792,797)           (289,636)             (5,637,371)

Other income (expense):
   Interest income                                   106,500               5,585                 136,529
   Interest expense                                  (41,502)             (4,056)                (46,185)
                                                 -------------------------------------------------------
Net loss                                         $(4,727,799)         $ (288,107)            $(5,547,027)
                                                 -------------------------------------------------------

Net loss per common share                        $      (.37)         $     (.05)            $      (.50)
                                                 =======================================================

Average outstanding common shares                 12,674,250           5,365,125              11,099,531
                                                 =======================================================
</TABLE>


See accompanying notes.

                                                                              12
<PAGE>   14
                                      -13-

                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                        Statements of Stockholders' Deficit

                                                 September 30, 1996

                                                    (Unaudited)
<CAPTION>

                                                                                
                                                                                                            Deficit  
                                                                                                           Accumulated
                                                   Common Stock      Additional                 Stock        During   
                                              ---------------------   Paid-In     Unearned   Subscription  Development 
                                               Shares     Par Value   Capital   Compensation  Receivable      Stage        Totals
                                              -------------------------------------------------------------------------------------
                                              
<S>                                           <C>          <C>       <C>         <C>         <C>           <C>          <C>   
Issuance of common stock to officers upon     
   organization                                1,847,000   $ 18,470                                                     $    18,470
Issuance of common and preferred stock in     
   exchange for $1,751,500 and extinguishment 
   of $250,000 bridge loan, net of expenses   
                                               2,150,000     21,157                                                          21,157
Net proceeds from issuance of common stock     1,400,000     13,768                                                          13,768
Net proceeds from issuance of common stock       226,000      2,250                                                           2,250
Subscription of 10,000 shares of common 
stock                                             10,000        100                             $(100)                            -
Net loss                                                                                                    $(819,228)     (819,228)
Effect of three-for-two stock splits           7,041,250     70,413                                           (70,413)            -
                                              -------------------------------------------------------------------------------------
                                              
Balances at December 31, 1995                 12,674,250    126,158                              (100)       (889,641)     (763,583)
                                              
Unearned compensation relating to incentive   
   stock option grants                                               $440,100    $(440,100)                                       -
Amortization of unearned compensation                                               21,407                                   21,407
Payment for stock subscription                                                                    100                           100
Net loss                                                                                                    (4,727,799)  (4,727,799)
                                              -------------------------------------------------------------------------------------
                                              
Balances at September 30, 1996                12,674,250   $126,158  $440,100    $(418,693)  $      -      $(5,617,440) $(5,469,875)
                                              =====================================================================================
</TABLE>

                                                                              13
See accompanying notes.


<PAGE>   15



                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

<TABLE>
                                              Statements of Cash Flows
<CAPTION>




                                                                                     FOR THE PERIOD FROM       FOR THE PERIOD 
                                                                NINE MONTHS ENDED       MAY 25, 1995         FROM MAY 25, 1995
                                                                  SEPTEMBER 30,        (INCEPTION) TO       (INCEPTION) THROUGH
                                                                      1996           SEPTEMBER 30, 1995      SEPTEMBER 30, 1996
                                                                ---------------------------------------------------------------
                                                                   (Unaudited)           (Unaudited)             (Unaudited)

<S>                                                               <C>                    <C>                    <C>         
Net cash used in operating activities                             $(4,168,121)           $ (279,331)            $(4,885,828)

INVESTING ACTIVITIES
Purchase of property and equipment, net                              (274,585)             (112,036)               (522,162)
                                                                  ---------------------------------------------------------
Net cash used in investing activities                                (274,585)             (112,036)               (522,162)

FINANCING ACTIVITIES
Proceeds from the issuance of note payable                            325,000                                       325,000
Repayments of note payable                                            (56,176)                                      (56,176)
Net proceeds from the issuance of common stock                                               38,420                  53,145
Payment for stock subscriptions                                        10,000                                        10,000
Net proceeds from the issuance of redeemable preferred stock
                                                                    3,484,261             1,730,000               6,770,918
Proceeds from the issuance of debt converted into capital
   stock                                                                                    250,000                 250,000
Repayment of capital lease obligations                                (61,103)                                      (63,742)
                                                                  ---------------------------------------------------------
Net cash provided by financing activities                           3,701,982             2,018,420               7,289,145
                                                                  ---------------------------------------------------------

Increase (decrease) in cash and cash equivalents                     (740,724)            1,627,053               1,881,155
Cash at beginning of the period                                     2,621,879                     -                       -

Cash at end of the period                                         $ 1,881,155            $1,627,053             $ 1,881,155
                                                                  =========================================================
</TABLE>


                                                                              14
See accompanying notes.


<PAGE>   16


                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

                     Notes to Unaudited Financial Statements



1. ACCOUNTING POLICIES

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The accompanying unaudited financial statements have been prepared in accordance
with generally accepted accounting principles for interim financial information.
Accordingly, they do not include all of the information and footnotes required
by generally accepted accounting principles for complete financial statements.
In the opinion of management, all adjustments (consisting of normal recurring
accruals) considered necessary for a fair presentation have been included.
Operating results for the nine-month period ended September 30, 1996 are not
necessarily indicative of the results that may be expected for the year ended
December 31, 1996.

2. CAPITAL STOCK

The Company is authorized to issue 20,000,000 shares of common stock, par value
of $.01 per share, 3,636,000 shares of preferred stock, par value $.99 per share
designated as Series A Redeemable Preferred Stock ("Series A Preferred") and
1,312,500 shares of preferred stock, par value $.01 per share designated as
Series B Participating Convertible Preferred Stock ("Series B Preferred").

In April 1996, the Company's Board of Directors declared a three-for-two split
of Common Stock effective immediately prior to the effectiveness of the
Company's Amended and Restated Certificate of Incorporation related to the
authorization of 1,312,500 shares of Series B Preferred. Accordingly, the
financial statements, and all common and per common share data, have been
retroactively adjusted to reflect the stock split. The par value of the
additional shares of Common Stock issued in connection with the stock split was
credited to Common Stock and charged to Deficit Accumulated During Development
Stage. The Company received $3,484,261, net of expenses, for the issuance of
1,311,842 shares of Series B Preferred.

Holders of Series B Preferred are entitled to dividends when and if declared by
the Board of Directors and may participate in voting to the extent of one vote
per share of Series B Preferred as if converted. The Series B Preferred is
redeemable at par value plus any declared and unpaid dividends at a rate of
one-third of the outstanding shares on each of April 30, 2002, 2003 and 2004 or
in full on a change in control or initial public offering of the Company's
equity securities. Series B Preferred has a liquidation preference equal to par
value, pooled with Series A, including any declared and unpaid dividends in the
event of a merger, sale or liquidation.

3. NOTES PAYABLE

In March 1996, the Company entered into a financing arrangement with an outside
investor group from which the Company received $325,000 in exchange for an
unsecured loan with an interest rate of 14%. Principal and interest are to be
paid in 36 equal monthly installments of $10,890 each, commencing on April 1,
1996. The Company received an additional $350,000 in exchange for a loan secured
by equipment with an interest rate of 8%. In connection with this financing
arrangement, the Company issued to this investor group warrants to purchase
72,000 shares of Common Stock at an exercise price of $.67 per share. The
warrants became exercisable upon issuance and expire seven years from the
issuance date.


                                                                              15
<PAGE>   17


                              Sahara Networks, Inc.
                        (A Development Stage Enterprise)

               Notes to Unaudited Financial Statements (continued)



4. SUBSEQUENT EVENTS

On October 8, 1996, the Company's Board of Directors declared a three-for-two
split of Common Stock effective immediately prior to the effectiveness of the
Company's Amended and Restated Certificate of Incorporation related to the
authorization of 1,052,632 shares of Series C Convertible Preferred Stock.
Accordingly, the financial statements, and all common and per common share data,
have been retroactively adjusted to reflect the increase in authorized common
shares and the stock split. The par value of the additional shares of Common
Stock issued in connection with the stock split was credited to Common Stock and
charged to Deficit Accumulated During Development Stage. The shares authorized
under the Company's Stock Option Plan were increased to 3,825,750 in conjunction
with this transaction.

On January 2, 1997, the Company signed an agreement with Cascade Communications
Corp. ("Cascade"), whereby Cascade will purchase the Company in exchange for 3.8
million shares of Cascade's common stock. The transaction is subject to, among
other matters, the approval of the shareholders of the Company.



                                                                             16

<PAGE>   1



                                                                    EXHIBIT 99.2

CASCADE COMMUNICATIONS CORP.
UNAUDITED PRO FORMA
COMBINED FINANCIAL STATEMENTS

          The accompanying unaudited pro forma combined balance sheet combines
the Cascade Communications Corp. ("Cascade") balance sheet with the Sahara
Networks, Inc. ("Sahara") balance sheet, each as of September 28, 1996 giving
effect to the Merger ("Merger") as if it occurred on September 28, 1996. The
accompanying unaudited pro forma combined statements of income combine Cascade's
results of operations for the nine months ended September 28, 1996 and for the
year ended December 31, 1995 with Sahara's results of operations for the same
periods, giving effect to the Merger, applying the purchase method of
accounting, including Sahara's results of operations from inception, May 25,
1995. The unaudited pro forma combined financial information does not
purport to represent the actual financial position or results of operations of
Cascade or Sahara had the Merger actually occurred at the indicated dates, nor
does it project Cascade's or Sahara's financial position or results of
operations for any future date or period.

          The unaudited pro forma financial information was prepared utilizing
the accounting policies of the respective companies. The policies of Sahara are
substantially consistent with those of Cascade. The unaudited pro forma
financial information reflects the allocation of purchase price in accordance
with generally accepted accounting principles. These condensed financial
statements should be read in conjunction with the financial statements and notes
thereto included in Cascade's Annual Report on Form 10-K for the year ended
December 31, 1995, Form 10-Q for the nine month period ended September 28, 1996
and Sahara's historical financial statements filed as part of this Form 8-K.


<PAGE>   2



             CASCADE COMMUNICATIONS CORP. AND SAHARA NETWORKS, INC.
<TABLE>
                             UNAUDITED PRO FORMA COMBINED BALANCE SHEET AT SEPTEMBER 28, 1996
                                                   (IN THOUSANDS)
<CAPTION>


                                                        HISTORICAL                    PRO FORMA
                                                   CASCADE       SAHARA      ADJUSTMENTS       COMBINED
                                                  --------      -------      -----------       ---------
<S>                                               <C>           <C>            <C>             <C>
ASSETS

Current assets:
   Cash and cash equivalents                      $ 84,276      $ 1,881        $      -        $  86,157
   Marketable securities                            15,876            -               -           15,876
   Accounts receivable, net                         48,570            -                           48,570
   Note receivable                                   1,703            -               -            1,703
   Inventories                                      18,611            -               -           18,611
   Deferred income taxes                             7,335            -               -            7,335
   Prepaid expenses and other current assets         2,075          241               -            2,316
                                                  --------      -------        --------        ---------
Total current assets                               178,446        2,122               -          180,568

Property and equipment, net                         29,051          941               -           29,992
Note receivable                                      1,353            -               -            1,353
Other assets                                         1,156            6           1,400 (e)        2,562
                                                  --------      -------        --------        ---------


Total assets                                      $210,006      $ 3,069        $  1,400        $ 214,475
                                                  ========      =======        ========        =========

LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)

Current liabilities:
   Accounts payable                               $ 13,398      $   676        $      -        $  14,074
   Deferred revenue                                  6,890            -               -            6,890
   Accrued expenses                                 16,320           40           4,050 (a)       20,410
   Capital lease obligations                             -          138               -              138
   Note payable                                          -           92               -               92
                                                  --------      -------        --------        ---------
Total current liabilities                           36,608          946           4,050           41,604

Note payable                                             -          177               -              177
Capital lease obligations                                -          388               -              388
Redeemable convertible preferred stock                   -        7,028          (7,028)(b)           -


Stockholders' equity:
   Common stock                                         89          126            (126)(b)           92
                                                                                      3 (c)
   Additional paid-in capital                       98,820          440            (440)(b)      311,934
                                                                                190,914 (c)
                                                                                 22,200 (d)
   Unearned compensation                                 -         (419)            419 (b)            -
   Retained earnings                                74,489       (5,617)          5,617 (b)     (139,720)
                                                                               (214,209 (f)
                                                  --------      -------        --------        ---------
Total stockholders' equity (deficit)               173,398       (5,470)          4,378          172,306
                                                  --------      -------        --------        ---------

Total liabilities and stockholders' equity
  (deficit)                                       $210,006      $ 3,069        $  1,400        $ 214,475
                                                  ========      =======        ========        =========
</TABLE>

                                                                               
See Notes to Unaudited Pro Forma Combined Financial Statements


<PAGE>   3


             CASCADE COMMUNICATIONS CORP. AND SAHARA NETWORKS, INC.
<TABLE>
                                UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                                    FOR THE NINE MONTHS ENDED SEPTEMBER 28, 1996
                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<CAPTION>


                                                        HISTORICAL                              PROFORMA
                                               --------------------------            ---------------------------
                                                CASCADE            SAHARA            ADJUSTMENTS        COMBINED
                                               --------           -------            -----------        --------

<S>                                            <C>                <C>                   <C>             <C>     
Revenue                                        $230,676           $     -               $    -          $230,676
Cost of revenue                                  80,898                 -                    -            80,898
                                               --------           -------               -------         --------
   Gross profit                                 149,778                 -                    -           149,778

Operating expenses:
   Research and development                      36,422             3,282                     -           39,704
   Sales and marketing                           30,233               657                     -           30,890
   General and administrative                     9,311               854                     -           10,165
                                               --------           -------               -------         --------
Total operating expenses                         75,966             4,793                     -           80,759

Income (loss) from operations                    73,812            (4,793)                    -           69,019

Interest income, net                              3,745                65                     -            3,810


Income (loss) before income taxes                77,557            (4,728)                    -           72,829

Provision for income taxes                       30,174                 -                (1,891)(e)       28,283
                                               --------           -------               -------         --------

Net income (loss)                              $ 47,383           $(4,728)              $ 1,891         $ 44,546
                                               ========           =======               =======         ========


Net income per common share                    $   0.49                                                 $   0.44

Weighted average shares of
   common stock outstanding                      97,457                                                  102,314
   
</TABLE>




See Notes to Unaudited Pro Forma Combined Financial Statements

                                          
<PAGE>   4



             CASCADE COMMUNICATIONS CORP. AND SAHARA NETWORKS, INC.
<TABLE>
                                UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS
                                        FOR THE YEAR ENDED DECEMBER 31, 1995
                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<CAPTION>


                                                         HISTORICAL                            PROFORMA
                                               ---------------------------            -------------------------
                                                CASCADE             SAHARA            ADJUSTMENTS      COMBINED
                                               --------             ------            -----------      --------

<S>                                            <C>                  <C>                  <C>           <C>     
Revenue                                        $134,834             $   -                $   -         $134,834
Cost of revenue                                  48,563                 -                    -           48,563
                                               --------             -----                -----          -------

   Gross profit                                  86,271                 -                    -           86,271

Operating expenses:
   Research and development                     20,651                464                    -           21,115
   Sales and marketing                          20,587                111                    -           20,698
   General and administrative                    6,955                269                    -            7,224
                                              --------              -----                -----          -------
Total operating expenses                        48,193                844                    -           49,037

Income (loss) from operations                   38,078               (844)                   -           37,234

Interest income, net                             3,238                 25                    -            3,263
                                              --------              -----                -----          -------

Income (loss) before income taxes               41,316               (819)                   -           40,497

Provision for income taxes                      15,906                  -                 (328)(e)       15,578
                                              --------              -----                -----          -------

Net income (loss)                             $ 25,410              $(819)               $ 328          $24,919
                                              ========              =====                =====          =======


Net income per common share
                                              $   0.28                                                  $  0.27

Weighted average shares of
   common stock outstanding                     91,220                                                   93,433
   
</TABLE>




See Notes to Unaudited Pro Forma Combined Financial Statements



                                                                            

<PAGE>   5


CASCADE COMMUNICATIONS CORP.
NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

DESCRIPTION OF THE TRANSACTION

         On January 28, 1997 Cascade completed its acquisition of Sahara, a
privately held developer of scalable, high-speed broadband access products
located in Wallingford, Connecticut, by means of a Merger of a wholly owned
subsidiary of Cascade with and into Sahara. As a result of the Merger, Sahara
became a wholly owned subsidiary of Cascade. Cascade issued approximately 3.4
million shares of Cascade common stock in exchange for all the outstanding
shares of Sahara. In addition, Cascade issued options for approximately 400,000
shares of Cascade common stock in exchange for Sahara's outstanding stock
options. The acquisition is accounted for under the purchase method of
accounting.

         The pro forma combined financial statements are intended for
information purposes and are not necessarily indicative of the future
consolidated financial position or future results of operations of the combined
entity. These condensed financial statements should be read in conjunction with
the financial statements and notes thereto included in Cascade's Annual Report
on Form 10-K for the year ended December 31, 1995, Form 10-Q for the nine month
period ended September 28, 1996 and Sahara's historical financial statements
filed as part of this Form 8-K.

PURCHASE PRICE ALLOCATION

<TABLE>
         The following is a summary of the purchase price and the allocation of
the purchase price to the net assets to be acquired as a result of the Merger,
calculated using an assumed Average Price of the Cascade Common Stock of $56.00:
<CAPTION>


Purchase Price:                                    (in thousands)

<S>                                                   <C>     
Fair value of shares of Cascade common stock          $190,917
Fair value of stock options                             22,200
Estimated transaction costs                              4,050
Assumed liabilities                                      1,511
                                                      --------
Total purchase price                                  $218,678
                                                      ========

Allocation of the Purchase Price:

Current assets                                        $  2,122
Property and equipment                                     941
Deferred taxes and other assets                          1,406
In-process technology                                  214,209
                                                      --------
Total purchase price                                  $218,678
                                                      ========
</TABLE>


         The purchase price was allocated to the assets of Sahara based on their
estimated respective fair values. In-process technology that has not reached
technological feasibility and that has no alternative future use is valued using
a risk adjusted cash flow model under which future cash flows were discounted,
taking into account risks related to existing and future markets and assessments
of the life expectancy of the technology. No completed technology was purchased
as Sahara has brought no products to market and no development project has
reached technological feasibility. Expected future cash flows associated with
in-process technology are discounted considering risks and uncertainties related
to the viability of and to the potential changes in future target markets and to
the completion of the products expected to ultimately be marketed by Cascade.
The in-process technology relates to the products that management intends to
further develop to the point of technological feasibility.


                                 
<PAGE>   6



PRO FORMA ADJUSTMENTS TO PRO FORMA COMBINED FINANCIAL STATEMENTS

     The accompanying unaudited pro forma combined statements of income combine
Cascade's results of operations for the nine months ended September 28, 1996 and
for the year ended December 31, 1995 with Sahara's results of operations for the
same periods, giving effect to the Merger, applying the purchase method of
accounting, including Sahara's results of operations from inception, May 25,
1995. Pro forma adjustments to the pro forma combined statements of income do
not give effect to an anticipated charge for in-process technology, which is
non-deductible for tax purposes and which is expected to be charged to
operations upon consummation of the Merger. The allocation of the purchase price
to the fair value of the in-process technology related to Sahara is subject to
change based on the final determination of the fair values of the assets of
Sahara.

     The following pro forma adjustments are reflected in the unaudited
combined financial statements.

a)    To record accrual for estimated acquisition costs.

b)    To eliminate Sahara's preferred stock and stockholders' deficit.

c)    Record issuance of 3,409,196 shares of $.001 par value Cascade common
      stock in exchange for all outstanding Sahara preferred and common stock.

d)    To record additional-paid-in capital related to the estimated fair value
      of the options to purchase Cascade common stock deemed to be exchanged 
      for the outstanding options to acquire Sahara common stock described 
      above.

e)    To record adjustments to income tax expense to reflect the estimated 
      income tax effects of the results of operations of the acquired business
      and record the tax benefits of Sahara's net operating losses.

f)    To record the impact to retained earnings of the charge for acquired
      in-process technology expected to be recorded upon consummation of the
      Merger.





© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission