EXHIBIT 4.6


                         SECURITIES PURCHASE AGREEMENT


                                 BY AND BETWEEN


                       MCI TELECOMMUNICATIONS CORPORATION


                                      AND


                 GENESYS TELECOMMUNICATIONS LABORATORIES, INC.



                               FEBRUARY 26, 1997


                                            MCI CONFIDENTIAL

 
                               TABLE OF CONTENTS

                                                                                       
ARTICLE 1 -- DEFINITIONS; PURCHASE AND SALE............................................    1
        1.1  Definitions...............................................................    1
             -----------
               (A)  "Affiliate"........................................................    1
               (B)  "Business Intellectual Property Rights"............................    1
               (C)  "CERCLA"...........................................................    2
               (D)  "Closing"...........................................................   2
               (E)  "Closing Date".....................................................    2
               (F)  "Code".............................................................    2
               (G)  "Commercial Documents"..............................................   2
               (H)  "Company Financial Statements".....................................    2
               (I)  "Company Interim Financial Statements".............................    2
               (J)  "Environmental Laws"...............................................    2
               (K)  "ERISA"............................................................    2
               (L)  "Fully Diluted Basis"..............................................    2
               (M)  "GAAP".............................................................    2
               (N)  "Hazardous Material"...............................................    2
               (O)  "IRS"..............................................................    2
               (P)  "Leased Improvements"..............................................    2
               (Q)  "Leased Property"..................................................    2
               (R)  "Material Adverse Effect"..........................................    3
               (S)  "Pension Plans"....................................................    3
               (T)  "Person"...........................................................    3
               (U)  "Plans"............................................................    3
               (V)  "Purchase Price"...................................................    3
               (W)  "Securities Act"...................................................    3
               (X)  "Stock"............................................................    3
               (Y)  "Tax"..............................................................    3
               (Z)  "Taxing Authority".................................................    3
               (AA) "Tax Return"......................................................     3
               (BB) "Warrant".........................................................     3
        1.2  Interpretive Rules........................................................    3
             ------------------
        1.3  Purchase and Sale.........................................................    4
             -----------------

ARTICLE 2 -- PURCHASE PRICE............................................................    4
        2.1  Purchase Price............................................................    4
             --------------
        2.2  Payment of Purchase Price.................................................    4
             -------------------------                                                                                       

ARTICLE 3 -- CLOSING...................................................................    4
 


                                      i 
                                      -  

 

                                                                                           
 ARTICLE 4 -- ADDITIONAL AGREEMENTS......................................................     4
        4.1  Registration Rights Agreement...............................................     4
             -----------------------------
        4.2  Commercial Documents........................................................     4
             --------------------

ARTICLE 5 -- REPRESENTATIONS AND WARRANTIES OF THE COMPANY...............................     4
        5.1  Corporate Organization......................................................     5
             ----------------------
        5.2  Valid and Binding Agreement.................................................     5
             ---------------------------
        5.3  No Violation................................................................     6
             ------------
        5.4  Consents and Approvals......................................................     6
             ----------------------
        5.5  Capitalization..............................................................     6
             --------------
        5.6  Subsidiaries and Affiliates.................................................     7
             ---------------------------
        5.7  Financial Statements........................................................     7
             --------------------
        5.8  Absence of Undisclosed Liabilities..........................................     7
             ----------------------------------
        5.9  Interim Operations and Absence of Certain Changes...........................     8
             -------------------------------------------------
        5.10  Taxes......................................................................     9
              -----
        5.11  Employee Benefit Plans.....................................................    10
              ----------------------
        5.12  Compliance with Law........................................................    12
              -------------------
        5.13  Litigation; Claims.........................................................    12
              ------------------
        5.14  Contracts and Commitments..................................................    12
              -------------------------
        5.15  Intellectual Property Rights...............................................    12
              ----------------------------
        5.16  Liens......................................................................    14
              -----
        5.17  Insurance..................................................................    14
              ---------
        5.18  Property...................................................................    14
              --------
        5.19  Environmental Matters......................................................    15
              ---------------------
        5.20  Governmental Authorizations................................................    15
              ---------------------------
        5.21  Employee Relations.........................................................    16
              ------------------
        5.22  Employees..................................................................    16
              ---------
        5.23  Broker's or Finder's Fees..................................................    16
              -------------------------
        5.24  Disclosure.................................................................    17
              ----------
        5.25  Certain Transactions.......................................................    17
              --------------------
        5.26  Offering...................................................................    17
              --------

ARTICLE 6 -- REPRESENTATIONS AND WARRANTIES OF THE BUYER.................................    17
        6.1  Corporate Organization......................................................    17
             ----------------------
        6.2  Valid and Binding Agreements................................................    17
             ----------------------------
        6.3  No Violation................................................................    18
             ------------
        6.4  Consents and Approvals......................................................    18
             ----------------------
        6.5  Broker's or Finder's Fees...................................................    18
             -------------------------
        6.6  Investment Representations..................................................    18
             --------------------------

ARTICLE 7 -- CONDITIONS PRECEDENT TO OBLIGATIONS OF THE BUYER............................    19
        7.1  Representations and Warranties..............................................    19
             ------------------------------
        7.2  Covenants, Agreements and Conditions........................................    19
             -----------------------------------



                                      ii
                                      --

 

                                                                                         
        7.3  Proceedings.................................................................   19
             -----------
        7.4  Corporate Proceedings.......................................................   19
             ---------------------
        7.5  Governmental Approvals......................................................   20
             ----------------------
        7.6  Amendment to Articles of Incorporation......................................   20
             --------------------------------------
        7.7  Insurance...................................................................   20
             ---------
        7.8  Deliveries..................................................................   20
             ----------
        7.9  Opinion of Counsel..........................................................   20
             ------------------

ARTICLE 8 -- CONDITIONS PRECEDENT TO OBLIGATIONS OF THE SELLERS..........................   20
        8.1  Representations and Warranties..............................................   21
             ------------------------------
        8.2  Covenants, Agreements and Conditions........................................   21
             ------------------------------------
        8.3  Proceedings.................................................................   21
             -----------
        8.4  Corporate Proceedings.......................................................   21
             ---------------------
        8.5  Governmental Approvals......................................................   21
             ----------------------
        8.6  Deliveries..................................................................   21
             ----------
ARTICLE 9 -- AFFIRMATIVE COVENANTS AND AGREEMENTS OF THE COMPANY.........................   21
        9.1  Financial Reporting.........................................................   21
             -------------------
        9.2  Reservation of Conversion Shares............................................   22
             --------------------------------
        9.3  Confidential Information and Invention Assignment Agreement.................   22
             -----------------------------------------------------------
        9.4  Repurchase..................................................................   22
             ----------

ARTICLE 10 -- OTHER MATTERS..............................................................   22
        10.1  Indemnification............................................................   22
              ---------------
        10.2  Indemnification Procedures.................................................   24
              --------------------------
        10.3  Confidentiality............................................................   25
              ---------------
        10.4  Further Assurances.........................................................   26
              ------------------

ARTICLE 11 -- MISCELLANEOUS..............................................................   26
        11.1  Survival of Representations, Warranties and Agreements.....................   26
              ------------------------------------------------------
        11.2  Service of Process.........................................................   26
              ------------------
        11.3  Notices....................................................................   26
              -------
        11.4  Governing Law..............................................................   27
              -------------
        11.5  Modification; Waiver.......................................................   27
              --------------------
        11.6  Entire Agreement...........................................................   27
              ----------------
        11.7  Assignment; Successors and Assigns.........................................   27
              ----------------------------------
        11.8  Public Announcements.......................................................   27
              --------------------
        11.9  Severability...............................................................   28
              ------------
        11.10  No Third Party Beneficiary................................................   28
               --------------------------
        11.11  Expenses..................................................................   28
               --------
        11.12  Execution in Counterpart..................................................   28
               ------------------------



                                      iii
                                      ---

 
                         SECURITIES PURCHASE AGREEMENT
                         -----------------------------
                                        

          This SECURITIES PURCHASE AGREEMENT (the "Agreement"), dated February
26, 1997, by and between MCI Telecommunications Corporation, a Delaware
corporation (the "Buyer"), and Genesys Telecommunications Laboratories, Inc., a
California corporation (the "Company").


                         W  I  T  N  E  S  S  E  T  H:
                                        
     WHEREAS, concurrently with the execution of the Commercial Documents (as
hereinafter defined) and the issuance of the Warrant (as hereinafter defined),
the Company desires to sell to the Buyer, and the Buyer desires to purchase from
the Company, the Stock (as hereinafter defined) upon the terms and conditions
set forth in this Agreement.

     NOW, THEREFORE, in consideration of the premises and of the mutual
representations, warranties and covenants which are to be made and performed by
the respective parties, it is hereby agreed as follows:


                  ARTICLE 1 -- DEFINITIONS; PURCHASE AND SALE

     2.1  Definitions.  The following terms when used in this Agreement have the
          -----------                                                           
meanings set forth below:

          (A)  "Affiliate" means any Person now or hereafter controlling,
     controlled by or under common control with another Person.

          (B)  "Business Intellectual Property Rights" means any and all
     inventions, Marks (including trademarks, service marks, certification
     marks, collective marks, and collective membership marks whether word,
     logo, or other forms of marks, all of the foregoing collectively referred
     to as "Marks"), trade names, copyrights, applications therefor, patents
     thereon, patent applications therefor, continuations, divisions and
     continuations in part, registrations thereof and licenses thereof, royalty
     rights, any and all goodwill associated with the business or represented by
     the assets of the Company, trade secrets, secret processes and procedures,
     engineering, production, assembly design and installation encompassed in
     any and all embodiments including, but not limited to technical drawings
     and specifications, working notes and memos, market studies, consultants'
     reports, technical and laboratory data, competitive samples, engineering
     prototypes, and confidential information, know-how, and all similar
     property of any nature, tangible or intangible.

                                            MCI CONFIDENTIAL

 
          (C)  "CERCLA" has the meaning set forth in Section 5.19(A).

          (D)  "Closing" has the meaning set forth in Article III.

          (E)  "Closing Date" has the meaning set forth in Article III.

          (F)  "Code" means the United States Internal Revenue Code of 1986, as
     amended.

          (G) "Commercial Documents" means, collectively, the Amendment to
     Master Software License Agreement, the Amendment to Maintenance Agreement
     and the Master Consulting Agreement to be entered into between the Buyer
     and the Company on the Closing Date.

          (H)  "Company Financial Statements" has the meaning set forth in
     Section 5.7.

          (I)  "Company Interim Financial Statements" has the meaning set forth
     in Section 5.7.

          (J)  "Environmental Laws" has the meaning set forth in Section
     5.19(C).

          (K)  "ERISA" means the Employment Retirement Income Security Act of
     1974, as amended.

          (L)  "Fully Diluted Basis" means, at any date as of which the number
     of shares thereof of any Person is to be determined, (a) all shares of
     capital stock of such Person outstanding at such date, and (b) the maximum
     number of shares of capital stock of such Person issuable pursuant to
     warrants, options or other rights to purchase or acquire (whether or not
     such warrants, options or other rights are then exercisable), or pursuant
     to securities convertible into or exchangeable (whether or not such
     securities are then convertible or exchangeable) for, shares of capital
     stock of such Person, outstanding on such date (including any warrants
     being issued on such date).

          (M)  "GAAP" means generally accepted accounting principles of the
     United States applied in a manner consistent with past practice of the
     Company.

          (N)  "Hazardous Material" has the meaning set forth in Section
     5.19(A).

          (O)  "IRS" means the United States Internal Revenue Service.

          (P)  "Leased Improvements" has the meaning set forth in Section
     5.18(A).

          (Q)  "Leased Property" has the meaning set forth in Section 5.18(A).

                                            MCI CONFIDENTIAL


 
          (R)  "Material Adverse Effect" means, with respect to any Person, any
     event, fact, condition, occurrence or effect which is materially adverse to
     the following, taken as a whole: the business, properties, assets,
     liabilities, capitalization, stockholders equity, financial condition,
     operations, licenses or other franchises or results of operations of such
     Person.

          (S)  "Pension Plans" has the meaning set forth in Section 5.11(B)(1).

          (T)  "Person" means and includes an individual, a partnership, a joint
     venture, a corporation or trust, an unincorporated organization, a group or
     a government or other department or agency thereof.

          (U)  "Plans" has the meaning set forth in Section 5.11(A).

          (V)  "Purchase Price" has the meaning set forth in Section 2.1.

          (W)  "Securities Act" shall mean the Securities Act of 1933, as
     amended.

          (X)  "Stock" means the 674,496 shares of Series C Preferred Stock of
     the Company, no par value, to be purchased by the Buyer at the Closing,
     which shares shall represent three percent (3.0%) of the equity of the
     Company on a Fully Diluted Basis as of the Closing Date (after giving
     effect to the sale of the Stock and the issuance of the Warrant).

          (Y)  "Tax" has the meaning set forth in Section 5.10(C).

          (Z)  "Taxing Authority" has the meaning set forth in Section 5.10(A).

          (AA)  "Tax Return" has the meaning set forth in Section 5.10(D).

          (AB)  "Warrant" shall mean that certain Warrant dated as of the
     Closing Date to purchase 449,664 shares of Series C Preferred Stock of the
     Company which shares shall represent two percent (2.0%) of the equity of
     the Company on a Fully Diluted Basis as of the Closing Date (after giving
     effect to the sale of the Stock and the issuance of the Warrant), in the
     form attached as Exhibit A hereto.
                      ---------        

     3.1  Interpretive Rules.  For purposes of this Agreement, except as
          ------------------                                            
otherwise expressly provided herein or unless the context otherwise requires:
(i) defined terms include the plural as well as the singular and the use of any
gender shall be deemed to include the other gender; (ii) references to
"Articles," "Sections" and other subdivisions and to "Schedules" and "Exhibits"
without reference to a document, are to designated Articles, Sections and other
subdivisions of, and to Schedules and Exhibits to, this Agreement; (iii) the use
of the term "including" means "including but not limited to"; and (iv) the words
"herein," "hereof," "hereunder" and other

                                            MCI CONFIDENTIAL
                                       3

 
words of similar import refer to this Agreement as a whole and not to any
particular provision.

     4.1  Purchase and Sale.  Upon the terms and subject to all of the
          -----------------                                           
conditions set forth herein, on the Closing Date, the Company agrees to (i) sell
to the Buyer and the Buyer agrees to purchase from the Company, free and clear
of all liens, pledges, security interests, claims, options, charges, rights of
first refusal or encumbrances whatsoever, the Stock and (ii) issue to the Buyer,
free and clear of all liens, pledges, security interests, claims, options,
charges, rights of first refusal or encumbrances whatsoever, the Warrant.


                          ARTICLE 5 -- PURCHASE PRICE

     6.1  Purchase Price.  The aggregate purchase price for the Stock (the
          --------------                                                  
"Purchase Price") shall be Seven Million Five Hundred Thousand Three Hundred
Ninety-five Dollars and Fifty Cents ($7,500,395.50).  The exercise price of the
Warrant shall be as set forth therein.

     7.1  Payment of Purchase Price.  At the Closing, the Buyer shall pay the
          -------------------------                                          
Company the Purchase Price by wire transfer, in immediately available funds, to
an account of the Company, which account shall be designated by the Company at
least three (3) business days prior to the date of the required payment.


                              ARTICLE 8 -- CLOSING

     The closing of the transactions contemplated hereby (the "Closing") shall
take place at the offices of Buyer, 1133 19th Street, N.W., Washington, D.C.
20036 at 10:00 a.m. local time, on February 26, 1997, or at such other time or
date as may be agreed upon by the parties hereto (the "Closing Date").


                       ARTICLE 9 -- ADDITIONAL AGREEMENTS

     10.1  Registration Rights Agreement.  At the Closing, the Company and Buyer
           -----------------------------                                        
will enter into the Registration Rights Agreement in the form attached as
                                                                         
Exhibit B, pursuant to which the Company shall grant certain registration rights
- ---------                                                                       
for the Stock and the shares of stock covered by the Warrant to Buyer.

     11.1  Commercial Documents.  At the Closing, the Company and Buyer will
           --------------------                                             
enter into the Commercial Documents.


          ARTICLE 12 -- REPRESENTATIONS AND WARRANTIES OF THE COMPANY

     The Company hereby represents and warrants, subject to the Schedule of
Exceptions attached hereto as Exhibit C, to the Buyer as follows, and the Buyer
                              ---------                                        
in agreeing to consummate

                                            MCI CONFIDENTIAL
                                       4

 
the transactions contemplated by this Agreement has relied upon such
representations and warranties, subject to such Schedule of Exceptions, that:

     13.1  Corporate Organization.
           ---------------------- 

          (A)  The Company is a corporation duly organized, validly existing and
     in good standing under the laws of the State of California and has the
     requisite power and authority (corporate and other) to own, lease and
     operate its properties and to carry on its business as now being conducted.

          (B)  The Company is duly qualified or licensed to do business as a
     foreign corporation and is in good standing in each of the jurisdictions
     listed on Schedule 5.1.  The Company is not qualified or licensed to do
               ------------                                                 
     business as a foreign corporation in any other jurisdiction and there are
     no other jurisdictions in which the failure to be qualified or licensed as
     a foreign corporation would have a Material Adverse Effect on the Company.

          (C)  The copies of the articles of incorporation and all amendments
     thereto of the Company, as certified by the Secretary of State of
     California, and the by-laws, as amended to date, of the Company, as
     certified by its secretary, which have heretofore been delivered to the
     Buyer, are true, complete and correct copies of the articles of
     incorporation and by-laws of the Company, as amended and in effect on the
     date hereof, and will be true, complete and correct as of the Closing Date.

          (D)  The minute books and records of the Company, copies of which have
     been furnished to the Buyer prior to the date hereof, are the original
     minute books and records of the Company, contain all proceedings of the
     stockholders, the Board of Directors and any committees thereof with
     respect to the Company, and are true, correct and complete in all material
     respects.  There have been no changes, alterations or additions to the
     minute books and records which have not been furnished to the Buyer prior
     to the date hereof.

     14.1  Valid and Binding Agreement.  The Company has all requisite corporate
           ---------------------------                                          
power and authority to enter into this Agreement.  All necessary action on the
part of the Company has been taken to authorize the execution and delivery of
this Agreement, the performance of its obligations hereunder and the
consummation of the transactions contemplated hereby (which includes, without
limitation, the issuance, sale, and delivery of the Stock, the Warrant and the
common stock issuable upon conversion of the Series C Preferred Stock).  This
Agreement has been duly and validly executed and delivered by the Company, and
constitutes the valid and binding agreement of the Company, enforceable in
accordance with its terms, except as the enforceability thereof may be limited
by bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
similar laws of general application relating to or affecting creditors' rights
generally and to general principles of equity (regardless of whether such
enforceability is considered in a proceeding in equity or at law).

                                            MCI CONFIDENTIAL
                                       5

 
     15.1  No Violation.  Neither the execution and delivery of this Agreement
           ------------                                                       
nor the consummation of the transactions contemplated hereby nor compliance by
the Company with any of the provisions hereof will (i) violate or conflict with
any provision of the articles of incorporation or by-laws of the Company, or to
the Company's knowledge, any statute, code, ordinance, rule, regulation,
judgment, order, writ, decree or injunction applicable to the Company, or (ii)
(a) violate, or (b) conflict with, or (c) result in a breach of any provision
of, or (d) constitute a default (or any event which, with or without due notice
or lapse of time, or both, would constitute a default) under, or (e) result in
the termination of, or (f) accelerate the performance required by, or (g) result
in the creation of any lien, security interest, charge or other encumbrance upon
the Stock, the Warrant or any of the properties or assets of the Company ( (a)
through (g) are collectively, "Defaults") under any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, deed of trust, license,
lease, agreement or other instrument or obligation of which the Company is
currently a party or by which the Company or any of its assets are bound where
such Default would have a Material Adverse Effect.

     16.1  Consents and Approvals.  No permit, consent, approval or
           ----------------------                                  
authorization of, or declaration, filing or registration with, any governmental
or regulatory authority or third party is required to be made or obtained by the
Company in connection with the execution, delivery and performance of this
Agreement or the consummation of the transactions contemplated hereby.

     17.1  Capitalization.
           -------------- 

          (A)  The authorized capital stock of the Company consists solely of
     (i) 120,000,000 shares of common stock, of which 12,744,086 shares are
     issued and outstanding; (ii) 900,000 shares of Series A Preferred Stock, of
     which 900,000 shares are issued and outstanding; (iii) 1,897,878 shares of
     Series B Preferred Stock, of which 1,897,878 shares are issued and
     outstanding; and (iv) 1,348,992 shares of Series C Preferred Stock of which
     854,363 shares are issued and outstanding (including the Stock).  The
     issued and outstanding capital stock is duly authorized, validly issued,
     fully paid and nonassessable, and none of the issued and outstanding shares
     of capital stock were issued in violation of the preemptive rights of any
     present or former stockholder of the Company.

          (B)  Schedule 5.5 contains a true, complete and correct listing of all
               ------------                                                     
     of the holders of issued and outstanding shares of capital stock of the
     Company and the number and type of shares held by each of them.

          (C)  Except as set forth in Section 5.5(A) and (B), (i) there are no
     shares of capital stock or other equity securities (as the term "equity
     security" is defined in the Securities Exchange Act of 1934, as amended) of
     the Company outstanding, (ii) there are no outstanding subscriptions,
     options, warrants or rights to purchase or acquire any

                                            MCI CONFIDENTIAL
                                       6

 
     equity securities of the Company, (iii) no equity securities of the Company
     are reserved for issuance for any purpose, (iv) there are no contracts,
     commitments, agreements, understandings, arrangements or restrictions to
     which the Company is a party or by which the Company is bound relating to
     any shares of the capital stock or other equity securities of the Company
     (including the Stock), whether or not outstanding, (v) and there is no
     other instrument, certificate, document or other right, whether or not
     represented by a certificate or other document or instrument, convertible
     (with or without consideration) into the capital stock of the Company.

          (D)  There are no repurchase rights except as set forth in Section 9.4
     hereof.

     18.1  Subsidiaries and Affiliates.  The Company owns no capital stock or
           ---------------------------                                       
other equity securities of any other corporation and has no other type of
interest (whether ownership or other) in any other corporation, partnership,
joint venture or other business organization or entity.  The interests of the
Company in any Person are owned by the Company free and clear of all liens,
options, claims or encumbrances (including without limitation, rights of first
refusal or similar rights) with respect to the ownership thereof.  The Company
is not subject to any obligation or requirement to provide funds for, or to make
any investment (in the form of a loan, capital contribution or otherwise) to or
in, any Person.

     19.1  Financial Statements.  The audited consolidated financial statements
           --------------------                                                
of the Company for each of the two (2) years ended June 30, 1994 and 1995,
attached as Schedule 5.7 hereto (the "Company Financial Statements") (i) present
            ------------                                                        
fairly the financial position, results of operations, shareholders' equity and
cash flows of the Company in accordance with GAAP, as of the statement dates and
for the periods indicated, and (ii) have been prepared in accordance with the
Company's customary procedures for the preparation of financial statements
consistently applied throughout and among the periods indicated.  The unaudited
interim consolidated financial statements of the Company for the year ended June
30, 1996 attached as Schedule 5.7A hereto (the "Company 1996 Financial
                     -------------                                    
Statements") and the unaudited condensed consolidated financial statements for
the six (6) months ended December 31, 1996, attached as Schedule 5.7B hereto
                                                        -------------       
(the "Company Interim Financial Statements") (x) present fairly the financial
position, results of operations, shareholder's equity and cash flows of the
Company, as of the statement date and for the period indicated, and (y) have
been prepared in accordance with the Company's customary procedures for the
preparation of annual and interim financial statements, respectively,
consistently applied throughout and among the periods indicated and are
consistent with the Company Financial Statements subject to year-end audit and
other normal or recurring year-end adjustments (made in accordance with GAAP, in
the ordinary course of business and consistent with prior year-end accounting
principles and adjustments), except that the Company Interim Financial
Statements do not contain any footnotes required by GAAP, are presented in a
condensed format and do not include a statement of shareholders' equity or a
statement of cash flows.

     20.1  Absence of Undisclosed Liabilities.  The Company has no material
           ----------------------------------                              
liability or obligation (absolute, accrued, contingent or otherwise), including
any guaranty with respect to

                                              MCI CONFIDENTIAL
                                       7

 
any obligation, except (a) such liabilities or obligations as are fully
reflected, reserved against or disclosed in the Company Financial Statements,
the Company 1996 Financial Statements or the Company Interim Financial
Statements and (b) such liabilities or obligations as have been incurred in the
ordinary course of business, consistent with past practice, since June 30, 1995.

     21.1  Interim Operations and Absence of Certain Changes.
           ------------------------------------------------- 

     Since December 31, 1996, the Company has conducted its business in the
ordinary course and consistent with past practice, and the Company has not:

          (A)  incurred any indebtedness or other liabilities (whether absolute,
     accrued, contingent or otherwise) or guaranteed any such indebtedness,
     except in the usual and ordinary course of its business, consistent with
     past practice;

          (B)  suffered any damage, destruction or loss of tangible assets,
     whether or not covered by insurance, in excess of $50,000;

          (C)  suffered any change in its financial condition, assets,
     liabilities or business or suffered any other event or condition of any
     character which individually or in the aggregate had or has a Material
     Adverse Effect on the Company or materially diminishes the value of the
     assets of the Company;

          (D)  paid, discharged or satisfied any claims, liabilities or
     obligations (absolute, accrued, contingent or otherwise) except in each
     case in the ordinary course of business;

          (E)  canceled any debts or waived any claims or rights of substantial
     value, except in each case in the ordinary course of business;

          (F)  pledged or permitted the imposition of any lien on or sold,
     assigned, transferred or otherwise disposed of any of its tangible assets,
     except the sale of inventory in the ordinary course of business;

          (G)  sold, assigned, encumbered, licensed, pledged, abandoned or
     otherwise transferred any patents, applications for patents, Marks, trade
     names, copyrights, licenses or other intangible assets other than in the
     ordinary course of its business;

          (H)  made any change in any method of accounting or accounting
     principle or practice;

          (I)  written up or down the value of the inventory or determined as
     collectible any notes or accounts receivable that were previously
     considered to be uncollectible, except for write-ups or write-downs and
     other determinations in accordance with GAAP and in the ordinary course of
     business and consistent with past practice;

          (J)  declared, paid or set aside for payment any dividend or other
     distribution on any shares of its capital stock;

                                              MCI CONFIDENTIAL
                                       8

 
          (K)  made any loans which in the aggregate exceed $10,000 to any
     employee or made any loans to any stockholder, officer, director or
     Affiliate;

          (L)  made capital expenditures or commitments for same in excess of
     $100,000 in the aggregate;

          (M)  agreed, whether in writing or otherwise, to take any action
     described in this Section 5.9.

     22.1  Taxes.
           ----- 

          (A)  The Company has duly and timely filed with each appropriate
     federal, state, local and foreign governmental entity or other authority
     (individually or collectively, "Taxing Authority") all Tax Returns required
     to be filed.  All such Tax Returns were true, correct and complete in all
     material respects.  The Company has timely paid all material Taxes which
     have become due and payable (whether or not shown on any Tax Return).  The
     Company is not currently, and has not been in the past, delinquent in the
     payment of any Tax, governmental charge or deposit for which any such
     failure would have a Material Adverse Effect.  Adequate reserves and
     accruals in accordance with generally accepted accounting principles have
     been established by the Company to provide for the payment of all Taxes
     which are not yet due and payable with respect to the Company for taxable
     periods or portions thereof ending on or before the Closing Date.  There
     are no liens for Taxes upon the Company or its assets except liens for
     current Taxes not yet due.  There are no liens on any property of the
     Company that arose in connection with the failure (or alleged failure) to
     pay any Taxes.  No audit, examination, investigation, proceeding, action or
     claim with respect to the Company's Taxes is pending, proposed or
     threatened, and there is no basis for the assessment or collection of
     additional Taxes against the Company.  To the Company's knowledge, there
     has never been an examination or notice of a potential examination of the
     Tax Returns of the Company by any Taxing Authority.  No extension is in
     effect with respect to the filing of any Tax Return, the payment of any
     Taxes, or any limitation period regarding the assessment or collection of
     any Taxes.

          (B)  All material Taxes that are required to have been withheld or
     collected by the Company have been duly withheld or collected and, to the
     extent required, have been paid to the proper governmental authorities or
     properly deposited as required by applicable laws.

          (C)  As used in this Agreement, "Tax" means any of the Taxes and
     "Taxes" means, with respect to the Company, all income taxes (including any
     tax on or based upon net income, or gross income, or income as specially
     defined, or earnings, or profits, or selected items of income, earnings or
     profits) and all gross receipts, capital gains, sales, use, ad valorem,
     transfer, franchise, license, withholding, payroll, employment, workers
     compensation, excise, severance, stamp, occupation, premium, property or
     windfall profit taxes, environmental (including taxes under Code Section
     59A, social security or similar taxes), unemployment, disability,
     registration, value-added, alternative or add-on minimum taxes, custom
     duties or other taxes, fees,

                                              MCI CONFIDENTIAL
                                       9

 
     assessments or charges of any kind whatsoever, together with any interest,
     penalties, additions to tax or additional amounts imposed by any Taxing
     Authority whether disputed or not.

          (D)  As used in this Agreement, "Tax Return" means any return, report,
     information return or other document (including any related or supporting
     information) filed or required to be filed with any Taxing Authority or
     other authority in connection with the determination, assessment or
     collection of any Tax paid or payable by the Company or the administration
     of any laws, regulations or administrative requirements relating to any
     such Tax.

          (E)  No claim which could have a Material Adverse Effect has ever been
     made by any Taxing Authority in a jurisdiction where the Company does not
     file Tax Returns that it is or may be subject to taxation by that
     jurisdiction.

     23.1  Employee Benefit Plans.
           ---------------------- 

          (A)  Except as set forth on the Schedule of Exceptions, the Company is
     not a party to any employee agreement, understanding, plan, policy,
     procedure, pattern or practice, or other arrangement, whether written or
     oral, which provides compensation or fringe benefits to its employees, and
     the Company is in material compliance with all its obligations under all
     annuity, bonus, cafeteria, stock option, stock purchase, profit sharing,
     savings, pension, retirement, incentive, group insurance, disability,
     employee welfare, prepaid legal, nonqualified deferred compensation
     (including without limitation, excess benefit plans, top-hat plans,
     deferred bonuses, rabbi trusts, secular trusts, nonqualified annuity
     contracts, insurance arrangements, nonqualified stock options, phantom
     stock plans, or golden parachute payments) and other similar fringe benefit
     plans, and all other employee benefit funds or programs (within the meaning
     of Section 3(3) of ERISA), covering employees, former employees or
     directors of the Company (the "Plans").  Except as required by applicable
     law, there are no negotiations, demands, commitments or proposals that are
     pending or that have been made that concern matters now covered, or that
     would be covered by the type of agreements described on the Schedule of
     Exceptions or in this Section 5.11(A).

          (B)  With respect to the Plans which are subject to ERISA:

               (1)  The Plans are in material compliance with the applicable
          provisions of ERISA and each of the employee pension benefit plans,
          within the meaning of Section 3(2) of ERISA (the "Pension Plans"),
          which are intended to be qualified under Section 401(a) of the Code
          have received a favorable determination letter from the IRS or a
          request for such determination has been timely filed with the IRS (and
          to the knowledge of the Company, nothing has occurred to cause the IRS
          to revoke such determination and the IRS has not indicated any
          disapproval

                                              MCI CONFIDENTIAL
                                      10

 
          of any request for such a determination);

               (2)  Each Plan has been materially operated in accordance with
          its terms and all required filings that are due prior to the date
          hereof, including without limitation, the Forms 5500, for all Plans
          have been timely made;

               (3)  No prohibited transactions, as defined by Section 406 of
          ERISA or Section 4975 of the Code, have occurred with respect to any
          of the Plans which would have a Material Adverse Effect;

               (4)  The Company has not engaged in any transaction in connection
          with which the Company could be subjected to a criminal or civil
          penalty under ERISA;

               (5)  None of the Plans, nor any trust which serves as a funding
          medium for any of such Plans, nor any issue relating thereto is
          currently under examination by or pending before the IRS, the
          Department of Labor, the PBGC or any court, other than applications
          for determinations pending before the IRS;

               (6)  None of the Pension Plans is a defined benefit plan within
          the meaning of Section 414(j) of the Code;

               (7)  None of the Plans is a "multiemployer plan" as that term is
          defined in Section 3(37) of ERISA, nor a plan maintained by more than
          one employer (hereinafter referred to as an "multiple employer plan"),
          nor a single employer plan under a multiple controlled group within
          the meaning of Section 4063 of ERISA, and neither the Company nor any
          entity required to be aggregated with the Company under Section
          414(b), (c), (m), or (o) of the Code has incurred any withdrawal
          liability with respect to any single plan, multiemployer or multiple
          employer plan;

               (8)  No benefit claims (except those submitted in the ordinary
          course of administration of such Plan) are currently pending against
          any Plan;

               (9)  No Plan provides for retiree medical or retiree life
          insurance benefits for former employees of the Company, except as
          required pursuant to the Consolidated Omnibus Reconciliation Act of
          1985, as amended, and there is no liability for taxes with respect to
          disqualified benefits under Section 4976 of the Code; and

               (10)  No Pension Plan has been terminated by the Company, and
          there is no liability for taxes with respect to a reversion of
          qualified plan assets under Section 4980 of the Code.

          (C)  There have been no failures to comply with the continuation
     coverage

                                              MCI CONFIDENTIAL
                                      11

 
     provisions required by Sections 601-608 of ERISA and Section 4980B of the
     Code under any Plan which would have a Material Adverse Effect.

          (D)  All excess contributions, if any (together with any income
     allocable thereto), have been distributed (or, if forfeitable, forfeited)
     before the close of the first two and one half (2 1/2) months of the
     following plan year; and there is no liability for excise tax under Section
     4979 of the Code with respect to such excess contributions, if any, for any
     Plan.

          (E)  There is no liability for taxes with respect to: (i) an
     accumulated funding deficiency under Section 4971 of the Code and/or (ii) a
     nondeductible contribution under Section 4792 of the Code.

     24.1  Compliance with Law.  The Company is in compliance with all
           -------------------                                        
applicable laws (including duties imposed by common law), rules, regulations,
orders, ordinances, judgments and decrees of all governmental authorities
(federal, state, local and foreign) and all requirements imposed under building,
zoning, occupational safety and health, pension, environmental control, toxic
waste, fair employment, equal opportunity or similar laws, rules, regulations
and ordinances, in each case the noncompliance with which would be likely to
have a Material Adverse Effect on the Company.

     25.1  Litigation; Claims.  There are no (a) claims, actions, suits,
           ------------------                                           
proceedings or investigations pending or (to the knowledge of the Company)
threatened by or against the Company in relation to the Company or its business,
or (b) judgments, decrees, arbitration awards, agreements or orders binding upon
the Company in relation to the Company or its business.  No material claims,
including without limitation, product liability claims, have been asserted
against the Company in relation to the Company or its business since the
Company's inception, and, to the knowledge of the Company, there is no
reasonable basis for any material action, proceeding or investigation involving
the Company in relation to the Company or its business.

     26.1  Contracts and Commitments.  The Company does not have any contract,
           -------------------------                                          
agreement, lease, or other commitment, written or oral, absolute or contingent,
other than (i) contracts for the purchase of supplies and services that were
entered into in the ordinary course of business and that do not, as of the date
hereof, involve more than $75,000 each; (ii) sales contracts entered into in the
ordinary course of business; (iii) license agreements entered into in the
ordinary course of business; and (iv) contracts terminable at will by the
Company on no more than  sixty (60) days notice without cost or liability to the
Company.

     27.1  Intellectual Property Rights.
           ---------------------------- 

          (A)  Schedule 5.15 sets forth an accurate and complete description of
               -------------                                                   
     (i) all patents, trademarks and copyrights of the Company which are
     registered or issued or for which registration or issuance is pending with
     any governmental authority specifying as to each such item, as applicable
     the jurisdiction(s) by or in which such patent, trademark

                                              MCI CONFIDENTIAL
                                      12

 
     or copyright has been issued or registered or in which an application for
     such issuance or registration has been filed, including the registration or
     application number; (ii) except as set forth in Section 5.14 (iii), all
     franchises, licenses, sublicenses, contracts and agreements pursuant to
     which any Person other than the Company is authorized to use any Business
     Intellectual Property Right owned by the Company; and (iii) the franchises,
     licenses, sublicenses, contracts and agreements pursuant to which the
     Company is authorized to use any such Business Intellectual Property Right
     not owned by the Company, including with respect to (ii) or (iii), the
     identity of all parties thereto, a description of the nature and subject
     matter thereof, the royalty provided and the term thereof.

          (B)  Except as set forth on the Schedule of Exceptions, the Company
     owns or has the right to use pursuant to franchise, license, sublicense,
     contract, agreement, or permission, all of the Business Intellectual
     Property Rights necessary for the conduct of its business (as currently
     conducted).  All applicable fees, royalties and other amounts due and
     payable by  by the Company to any Person or to the Company by any Person in
     respect of such Business Intellectual Property Rights have been paid.  The
     Company has taken all reasonably necessary and desirable action to maintain
     and protect each Business Intellectual Property Right that it owns or has
     the right to use.

          (C)  Except for third party licenses listed on the Schedule of
     Exceptions, the Company is the sole and exclusive owner of its Business
     Intellectual Property Rights including, but not limited to, those listed or
     described on the Schedule of Exceptions, or has the right to the use
     thereof for the material covered thereby in connection with the services or
     products in respect to which they have been or are now being used.

          (D)  Except as set forth on the Schedule of Exceptions, the Company
     (i) is not the subject of any pending litigation or, to the Company's
     knowledge, any claim regarding infringement of or misappropriation or
     misuse of any Business Intellectual Property Right of the Company or other
     tangible right of any other Person, (ii) has no knowledge of any such
     infringement, whether or not claimed by any other Person, which
     infringement might have a Material Adverse Effect, (iii) has no knowledge
     of any infringement by any other Person of any of the Business Intellectual
     Property Rights of the Company, and (iv) has no knowledge of any facts or
     circumstances which would reasonably be anticipated to result in any such
     litigation or claim or which would reasonably lead the Company to conclude
     that the continued operation and conduct of any aspect of its business
     would result in any such litigation or claim.  To the knowledge of the
     Company, except as set forth on the Schedule of Exceptions, there is no
     other Person that is operating under or otherwise using any name
     confusingly similar with any trade names, trademarks, service names,
     service marks or logos included in the Company's Business Intellectual
     Property Rights.  To the best of the Company's knowledge, no Business
     Intellectual Property licensed by the Company from a third party is subject
     to any outstanding order, judgment, decree, stipulation or agreement
     restricting the use thereof by the Company.  Except as set forth on the
     Schedule of Exceptions, no Business Intellectual Property Right of the
     Company is subject to any outstanding order, judgment, decree, stipulation
     or agreement restricting the use thereof by the Company.  Except as

                                              MCI CONFIDENTIAL
                                      13

 
     set forth on the Schedule of Exceptions, the Company has not entered into
     any written agreement to indemnify any other Person against any charge of
     infringement by any Business Intellectual Property Rights.

          (E)  Except as set forth on the Schedule of Exceptions, to the best of
     the Company's knowledge after reasonable inquiry, no material trade secrets
     included in the Company's Business Intellectual Property Rights have been
     disclosed by the Company to any Person other than employees, agents and
     representatives of the Company and its Affiliates or the Buyer.  The
     Company has taken such reasonable measures as is appropriate to protect all
     of its trade secrets.

          (F)  Except for obligations that arise under the common law of the
     appropriate jurisdiction, to the best of the Company's knowledge, neither
     the Company, nor any of its employees, has, other than confidentiality and
     other agreements assigning inventions made prior to their employment with
     the Company, any written agreements or arrangements with former employers
     of such employees relating to trade secrets of such employers, the
     assignment of inventions of such employers, or such employee's engagement
     in activities competitive with such employers.  Except for obligations that
     arise under the common law of the appropriate jurisdiction, to the best of
     the Company's knowledge, the activities of such employees on behalf of the
     Company do not violate any agreements or arrangements known to the Company
     which any such employees have with former employers.

     28.1  Liens.  None of the properties or assets, whether real, personal or
           -----                                                              
mixed, or tangible or intangible, owned or leased by the Company is subject to
any mortgage, lien, encumbrance or other security interest or restrictions on or
conditions to transfer or assignment, except for (a) liens for taxes and
assessments or governmental charges or levies not at the time due; (b) liens in
respect of pledges or deposits under workmen's compensation laws or similar
legislation, carriers', warehousemen's, mechanics', laborers' and materialmen's
and similar liens, if the obligations secured by such liens are not then
delinquent or are being contested in good faith by appropriate proceedings; and
(c) liens incidental to the conduct of the business.

     29.1  Insurance.  Schedule 5.17 contains a list of all insurance policies
           ---------   -------------                                          
and fidelity bonds relating to the assets of the Company, including summary
descriptions and the termination dates thereof.  The Company has not had
coverage denied or limited by any insurance carrier to which it has applied for
insurance or with which it has carried insurance, during the last two (2) years.
The Company is not in material default with respect to any provision contained
in any insurance policy and has not failed to give any notice or present any
claim thereunder in timely fashion.

     30.1  Property.
           -------- 

          (A)  Schedule 5.18 identifies all of the real property that the
               -------------                                             
     Company leases (as lessee), has agreed to lease or has an obligation to
     lease in connection with the Business.  Such leased real property, the loss
     of which would have a Material Adverse Effect, is hereinafter referred to
     as the "Leased Property," and the improvements and fixtures

                                              MCI CONFIDENTIAL
                                      14

 
     thereon are hereinafter referred to as the "Leased Improvements."  The
     Company does not own any real property.

          (B)  There are no adverse or other parties in possession of the Leased
     Property, the Leased Improvements or any portion or portions thereof, and
     the leasehold interest in the Leased Property and the Leased Improvements
     is free and clear of any and all leases, licensees, occupants or tenants.
     To the knowledge of the Company, there are no pending or threatened
     condemnation, eminent domain or similar proceedings, or litigation or other
     proceedings affecting the Leased Property, the Leased Improvements or any
     portion or portions thereof.  To the knowledge of the Company, there are no
     pending requests, applications or proceedings to alter or restrict any
     zoning or other use restrictions applicable to the Leased Property or the
     Leased Improvements that would interfere with the conduct of its business,
     which interference would have a Material Adverse Effect.  The Leased
     Property have access, in accordance with past practice, to and from a
     public right of way or road dedicated for public use and no notice has been
     received by the Company relating to the termination or impairment of such
     access (including applicable parking requirements).

     31.1  Environmental Matters.
           --------------------- 

          (A)  As used in this Agreement "Hazardous Material" shall mean:  (i)
     any "hazardous substance" as now defined pursuant to the Comprehensive
     Environmental Response, Compensation and Liability Act of 1980 ("CERCLA"),
     42 U.S.C. (S) 9601(14), or any substance listed or identified by any
     characteristic in any regulation adopted pursuant to any statute referred
     to or incorporated into such definition, all as in effect on the date
     hereof; (ii) any petroleum, including crude oil and any fraction thereof;
     (iii) natural gas, natural gas liquids, liquefied natural gas, or synthetic
     gas usable for fuel; (iv) any "hazardous chemical" as defined pursuant to
     29 C.F.R. Part 1910; and (v) any asbestos, polychlorinated biphenyl, or
     isomer of dioxin.

          (B)  To the Company's knowledge, the Company has not used, generated,
     manufactured, stored, disposed of, on, or about any of the real property
     leased or used by any the Company any Hazardous Materials in violation of
     any Environmental Laws.  The Company has not received any notice of, or to
     the knowledge of the Company is subject to, any actual or potential
     liability, fixed or contingent, under any Environmental Laws.

          (C)  To the Company's knowledge, neither the Company nor any of its
     predecessors in interest has any liability, matured or not matured,
     absolute or contingent, assessed or unassessed, imposed or based upon any
     provision under any foreign, federal, state or local law, rule, or
     regulation or common law, or under any code, order, decree, judgment or
     injunction applicable to the Company or its predecessors in interest, nor
     has the Company received any notice, or request for information issued,
     promulgated, approved or entered thereunder, or under the common law, or
     any tort, nuisance or

                                              MCI CONFIDENTIAL
                                      15

 
     absolute liability theory, relating to public health or safety, worker
     health or safety, or pollution, damage to or protection of the environment
     including without limitation, laws relating to emissions, discharges,
     releases or threatened releases of Hazardous Material into the environment
     (including without limitation, ambient air, surface water, groundwater,
     land surface or subsurface), or otherwise relating to the manufacture,
     processing, distribution, use, treatment, storage, generation, disposal,
     transport or handling of any Hazardous Material (collectively referred to
     as "Environmental Laws").

     32.1  Governmental Authorizations.  The Company possesses all licenses,
           ---------------------------                                      
franchises, permits, certificates, orders, approvals, exemptions, registrations
or other authorizations (collectively, the "Permits") from governmental,
regulatory or administrative agencies or authorities required for the ownership
of its properties and assets and operation of its business in the manner
presently conducted (including those required pursuant to laws or regulations
relating to the protection of the environment), each of which is in full force
and effect, the absence of which would have a Material Adverse Effect.  No
registrations, filings, applications, notices, transfers, consents, approvals,
orders, qualifications, waivers or other actions of any kind are required by
virtue of the execution and delivery of this Agreement or the consummation of
the transactions contemplated hereby to enable the Company to continue the
possession and operation of its properties and assets and the business of the
Company as presently conducted in all material respects.

     33.1  Employee Relations.  The Company has not at any time during the past
           ------------------                                                  
five years had, nor is there now threatened, any labor disputes or any strike,
picket, work stoppage, work slowdowns or other job action due to labor
disagreements.  The Company is (a) in material compliance with all applicable
laws respecting employment and employment practices, terms and conditions of
employment and wages and hours, including the terms and provisions of any
collective bargaining agreement or other contract with a labor union
representing any employees of the Company and is not engaged in any unfair labor
practice; (b) there is no unfair labor practice charge or complaint against the
Company, or (to the knowledge of the Company) threatened before the National
Labor Relations Board or any foreign authority; (c) no question concerning
representation has been raised to the Company or is (to the knowledge of the
Company) threatened respecting the employees of the Company; (d) no grievance
that might have a Material Adverse Effect on the Company, nor any arbitration
proceeding arising out of or under any collective bargaining agreement, is
pending and, to the Company's knowledge, no claims therefor exist; and (e) no
collective bargaining agreement that is binding on the Company restricts it from
relocating, closing or contracting any of its operations.

     34.1  Employees.  To the knowledge of the Company, no employee of the
           ---------                                                      
Company is in violation of any term of any employment contract, patent
disclosure agreement or any other contract or agreement relating to the
relationship of such employee with the Company or to the Company's knowledge any
other party because of the nature of the business conducted or to be conducted
by the Company.  There is no pending nor, to the Company's knowledge, threatened
action, suit, proceeding or claim, or to its knowledge any basis therefor or
threat thereof with respect to any contract, agreement, covenant or obligation
referred to in the preceding sentence.

                                              MCI CONFIDENTIAL
                                      16

 
The Company and each employee of the Company and any subsidiary of the Company
employed in any technical capacity or with access to  confidential information
of the Company has entered into a Confidential Information and Invention
Assignment Agreement substantially in the form of Exhibit D hereto.
                                                  ---------        

     35.1  Broker's or Finder's Fees.  No agent, broker, investment banker,
           -------------------------                                       
Person or firm acting on behalf of the Company or under the authority of the
Company is or will be entitled to any broker's or finder's fee or any other
commission or similar fee directly or indirectly from any of the parties hereto
in connection with any of the transactions contemplated hereby.


     36.1  Disclosure.  No representation or warranty by the Company to the
           ----------                                                      
Buyer contained in this Agreement, and no statement contained in the Schedules
hereto or any certificate furnished to the Buyer pursuant to the provisions
hereof, taken as a whole, contains any untrue statement of a material fact or
omits to state a material fact necessary in order to make the statements herein
or therein not misleading.

     37.1  Certain Transactions.  None of the directors or officers of the
           --------------------                                           
Company is currently a party to any material transaction with the Company (other
than for services as employees, officers and directors), including without
limitation, any material contract, agreement or other arrangement providing for
the furnishing of services to or by, providing for rental of real or personal
property to or from, or otherwise requiring payments to or from, any such
Person, or to or from any corporation, partnership, trust or other entity in
which any such Person owns in excess of five percent (5%) of the outstanding
equity interest.

     38.1  Offering.  Subject to the accuracy of the Buyer's representations in
           --------                                                            
Article VI hereof, the offer, sale and issuance of the Stock and Warrant to be
issued in accordance with the terms of this Agreement, and the issuance of the
common stock to be issued upon conversion of the Stock and shares issuable
pursuant to the Warrant, constitute transactions exempt from the registration
requirements of the Securities Act.


           ARTICLE 39 -- REPRESENTATIONS AND WARRANTIES OF THE BUYER

     The Buyer represents and warrants to the Company, and the Company in
agreeing to consummate the transactions contemplated by this Agreement have
relied upon such representations and warranties, that:

     40.1  Corporate Organization.  The Buyer is a corporation duly organized,
           ----------------------                                             
validly existing and in good standing under the laws of the State of Delaware
and has the requisite power and authority (corporate and other) to own, lease
and operate its properties and to carry on its business as now being conducted.

                                              MCI CONFIDENTIAL
                                      17

 
     41.1  Valid and Binding Agreements.  The Buyer has all requisite corporate
           ----------------------------                                        
power and authority to enter into this Agreement.  All necessary action on the
part of the Buyer has been taken to authorize the execution and delivery of this
Agreement, the performance of its obligations hereunder and the consummation of
the transaction contemplated hereby.  This Agreement has been duly and validly
executed and delivered by the Buyer, and will constitute the valid and binding
agreement of the Buyer, enforceable in accordance with its terms, except as the
enforceability thereof may be limited by bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar laws of general application
relating to or affecting creditors' rights generally and to general principles
of equity (regardless of whether such enforceability is considered in a
proceeding in equity or at law).

     42.1  No Violation.  Neither the execution and delivery of this Agreement
           ------------                                                       
nor the consummation of the transactions contemplated hereby or thereby nor
compliance by the Buyer with any of the provisions hereof or thereof will (i)
violate or conflict with any provision of the certificate of incorporation or
by-laws of the Buyer or any statute, code, ordinance, rule, regulation,
judgment, order, writ, decree or injunction applicable to the Buyer, or (ii)
violate or conflict with, or result in a breach of any provision of, or
constitute a default (or any event which, with or without due notice or lapse of
time, or both, would constitute a default) under, or result in the termination
of, or accelerate the performance required by, or result in the creation of any
lien, security interest, charge or other encumbrance upon the stock or any of
the properties or assets of the Buyer under any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, deed of trust, license,
lease, agreement or other instrument of the Buyer.

     43.1  Consents and Approvals.  No permit, consent, approval or
           ----------------------                                  
authorization of, or declaration, filing or registration with, any governmental
or regulatory authority or third party is required to be made or obtained by the
Buyer in connection with the execution, delivery and performance of this
Agreement or the consummation of the transactions contemplated hereby or
thereby.

     44.1  Broker's or Finder's Fees.  No agent, broker, investment banker,
           -------------------------                                       
Person or firm acting on behalf of the Buyer, or under the authority of the
Buyer, is or will be entitled to any broker's or finder's fee or any other
commission or similar fee directly or indirectly from the Buyer in connection
with any of the transactions contemplated hereby.

     45.1  Investment Representations.
           -------------------------- 

          (A)  By reason of its business and financial experience, Buyer has the
     capacity to protect its own interests in connection with the purchase of
     the Stock and Warrant hereunder and has the ability to bear the economic
     risk of this investment.

          (B)  Buyer is acquiring the Stock and the Warrant and the common stock
     underlying the Stock and Warrant for investment for its own account, not as
     a nominee or agent, and not with the view to, or for resale in connection
     with, any distribution

                                              MCI CONFIDENTIAL
                                      18

 
     thereof.  Buyer understands that the Stock and Warrant to be purchased (and
     the common stock issuable upon conversion of the Stock and Warrant) have
     not been, and will not be, registered under the Securities Act by reason of
     a specific exemption from the registration provisions of the Securities
     Act, the availability of which depends upon, among other things, the bona
     fide nature of the investment intent and the accuracy of Buyer's
     representations as expressed herein.

          (C)  Buyer acknowledges that the Stock and Warrant (and the common
     stock issuable upon conversion of the Stock  and Warrant) must be held
     indefinitely unless subsequently registered under the Securities Act or
     unless an exemption from such registration is available.  Buyer is aware of
     the provisions of Rule 144 promulgated under the Securities Act which
     permit limited resale of shares purchased in a private placement subject to
     the satisfaction of certain conditions, including, among other things, the
     existence of a public market for the shares, the availability of certain
     current public information about the Company, the resale occurring not less
     than two years after a party has purchased and paid for the security to be
     sold, the sale being effected through a "broker's transaction" or in
     transactions directly with a "market maker" and the number of shares being
     sold during any three-month period not exceeding specified limitations.

          (D)  Buyer understands that no public market now exists for any of the
     securities issued by the Company and that the Company has made no
     assurances that a public market will ever exist for the Company's
     securities.

          (E)  Buyer has had an opportunity to discuss business, management and
     financial affairs of the Company with its management.


         ARTICLE 46 -- CONDITIONS PRECEDENT TO OBLIGATIONS OF THE BUYER

     All obligations of the Buyer that are to be discharged under this Agreement
at the Closing are subject to the Company's fulfillment, at the Closing or
effective as of the Closing Date, of each of the following conditions (unless
expressly waived in writing by the Buyer at any time at or prior to the Closing)
and the Company shall use its reasonable efforts to cause each of such
conditions to be satisfied:

     47.1  Representations and Warranties.  On the Closing Date, the
           ------------------------------                           
representations and warranties of the Company set forth in Article V of this
Agreement shall be true and correct in all respects as though such
representations and warranties had been made by the Company on and as of the
Closing Date and the Buyer shall have received at the Closing a certificate,
dated the Closing Date, signed by the President or a Vice President of the
Company to such effect.

     48.1  Covenants, Agreements and Conditions.  The Company shall have
           ------------------------------------                         
performed and complied in all respects with all covenants, agreements and
conditions contained in this Agreement required to be performed by the Company
on or prior to the Closing Date, and the

                                              MCI CONFIDENTIAL
                                      19

 
Buyer shall have received at the Closing a certificate, dated the Closing Date,
signed by the President or a Vice President of the Company to such effect.

     49.1  Proceedings.  No action or proceeding shall be pending or threatened
           -----------                                                         
to restrain or prevent the consummation of the transactions contemplated hereby.

     50.1  Corporate Proceedings.  All corporate and other proceedings to be
           ---------------------                                            
taken and all consents to be obtained in connection with the transactions
contemplated by this Agreement and all documents incident thereto shall be
reasonably satisfactory in form and substance to the Buyer and its counsel,
both of whom shall have received all such originals or certified or other copies
of such documents as either may reasonably request.

     51.1  Governmental Approvals.  There shall have been received all necessary
           ----------------------                                               
governmental consents or authorizations required in connection with the
transactions contemplated hereby including all necessary Blue Sky law permits
and qualification.

     52.1  Amendment to Articles of Incorporation.  The Company shall have filed
           --------------------------------------                               
its Amended and Restated Articles of Incorporation in the form attached hereto
as Exhibit E.
   --------- 

     53.1  Insurance.  The Company shall have maintained in full force and
           ---------                                                      
effect the insurance coverage described on Schedule 5.17 hereto or policies
                                           -------------                   
providing substantially equivalent coverage.

     54.1  Deliveries.  The Company shall have delivered to the Buyer the
           ----------                                                    
following items:

          (A)  certificates representing the shares of Stock, duly endorsed or
     accompanied by stock powers duly executed in blank (with signatures
     guaranteed by any national bank or trust company) and otherwise in form
     acceptable for transfer on the books of the Company, with all requisite
     stock transfer tax stamps attached;

          (B)  the executed Warrant;

          (C)  the executed Commercial Documents and Registration Rights
     Agreement;

          (D)  a certificate dated as of or about the Closing Date, as to the
     good standing of the Company from the Secretary of State of California;

          (E)  a certificate of the Secretary or Assistant Secretary of the
     Company, certifying as to the Articles of Incorporation, By-laws,
     resolutions of the Board of Directors, and incumbency and signatures of
     officers of the Company; and

          (F)  all other previously undelivered items required to be delivered
     by the Company  to the Buyer at or prior to the Closing pursuant to this
     Agreement or otherwise required in connection herewith unless waived in
     writing by the Buyer.

                                              MCI CONFIDENTIAL
                                      20

 
     55.1  Opinion of Counsel.  The Buyer shall have received a written opinion
           ------------------                                                  
dated as of the Closing Date from Brobeck Phleger & Harrison LLP, counsel to the
Company, in the form attached hereto as Exhibit F.
                                        --------- 


        ARTICLE 56 -- CONDITIONS PRECEDENT TO OBLIGATIONS OF THE SELLERS

     All obligations of the Company that are to be discharged under this
Agreement at the Closing are subject to Buyer's fulfillment at the Closing or
effective as of the Closing Date of each of the following conditions (unless
expressly waived in writing by the Company at any time at or prior to the
Closing) and the Buyer shall use its reasonable efforts to cause each of such
conditions to be satisfied:

     57.1  Representations and Warranties.  On the Closing Date, the
           ------------------------------                           
representations and warranties of the Buyer set forth in Article VI of this
Agreement shall be true and correct in all respects as though such
representations and warranties had been made on and as of the Closing Date, and
the Company shall have received at the Closing a certificate, dated the Closing
Date, signed by the President or a Vice President of the Buyer to such effect.

     58.1  Covenants, Agreements and Conditions.  The Buyer shall have performed
           ------------------------------------                                 
and complied in all respects with all covenants, agreements and conditions
contained in this Agreement required to be performed by it on or prior to the
Closing Date, and the Company shall have received at the Closing a certificate,
dated the Closing Date, signed by the President or a Vice President of the Buyer
to such effect.

     59.1  Proceedings.  No action or proceeding shall be pending or threatened
           -----------                                                         
to restrain or prevent the consummation of the transactions contemplated hereby.

     60.1  Corporate Proceedings.  All corporate and other proceedings to be
           ---------------------                                            
taken and all consents to be obtained in connection with the transactions
contemplated by this Agreement and all documents incident thereto shall be
reasonably satisfactory in form and substance to the Company and its counsel,
Brobeck Phleger & Harrison LLP, each of whom shall have received all such
originals or certified or other copies of such documents as either may
reasonably request.

     61.1  Governmental Approvals.  There shall have been received all necessary
           ----------------------                                               
governmental consents or authorizations required in connection with the
transactions contemplated hereby including all necessary Blue Sky law permits
and qualities.

     62.1  Deliveries.  The Buyer shall have delivered to the Company the
           ----------                                                    
following items:

          (A)  the payment as required by Section 2.2;

          (B)  the Commercial Documents executed by it; and

                                              MCI CONFIDENTIAL
                                      21

 
          (C)  all other previously undelivered items required to be delivered
     by the Buyer at or prior to the Closing pursuant to this Agreement or
     otherwise required in connection herewith unless waived in writing by the
     Company and the Stockholders.


       ARTICLE 63 -- AFFIRMATIVE COVENANTS AND AGREEMENTS OF THE COMPANY

     64.1  Financial Reporting.  The Company hereby covenants and agrees with
           -------------------                                               
the Buyer that from and after the Closing, so long as any of the Series C
Preferred Stock is outstanding, the Company will deliver to the Buyer (i) within
forty-five (45) days after the end of each quarter, quarterly unaudited
financial statements; (ii) within one hundred twenty (120) days after the end of
each fiscal year,  audited financial statements for such period; and (iii)
within ninety (90) days after the end of the fiscal year, an annual financial
plan for the Company.  The Company also agrees to provide Buyer the opportunity
for its  representative who is approved by the Company to attend Board of
Directors meetings including the receipt of advance notice thereof; provided,
however, that the Company shall not be obligated to provide any information that
it considers in good faith to be a trade secret or to contain confidential or
classified information and provided further that the Company may at the
discretion of the Board of Directors exclude any non-board member from its
executive sessions of its Board of Directors.

     65.1  Reservation of Conversion Shares.  The Company shall at all times
           --------------------------------                                 
reserve and keep available out of its authorized but unissued shares of common
stock, for the purposes of effecting the conversion of the Stock and the
issuance of shares issuable pursuant to the Warrant and otherwise complying with
the terms of this Agreement, such number of its duly authorized shares of common
stock as shall be sufficient to effect the conversion of the Stock and the
issuance of shares issuable pursuant to the Warrant, as from time to time
outstanding.  If at any time the number of authorized but unissued shares of
common stock shall not be sufficient to effect the conversion of the Stock and
the issuance of shares issuable pursuant to the Warrant, the Company will
forthwith take such corporate action as may be necessary to increase its
authorized but unissued shares of common stock as shall be sufficient for such
purposes.

     66.1  Confidential Information and Invention Assignment Agreement.  The
           -----------------------------------------------------------      
Company and each person now or hereafter employed in any technical capacity by
it or any subsidiary with access to confidential information will enter into a
Confidential Information and Invention Assignment Agreement in substantially the
form of Exhibit E hereto, and the Company shall use its best efforts to cause
        ---------                                                            
any consultant retained by it that has access to confidential information to
enter into a form  of Consulting Agreement with substantially similar
confidentiality and non-solicitation provisions.

     67.1  Repurchase.  Upon and only at the written request of Buyer, so long
           ----------                                                         
as any of the Series C Preferred Stock is outstanding, in the event of (a) a
material breach of any of the Company's representations, warranties or covenants
contained herein, or (b) a termination of any of the Commercial Documents as a
result of the Company's material breach of any of its

                                              MCI CONFIDENTIAL
                                      22

 
representations, warranties or covenants contained in such documents, the
Company shall repurchase the Stock for the liquidation value thereof as
specified in the Company's articles of incorporation.


                          ARTICLE 68 -- OTHER MATTERS

     69.1  Indemnification.
           --------------- 

          (A)  Subject to the limitations hereinafter set forth in this Section
     10.1, the Company  shall protect, defend, hold harmless and indemnify the
     Buyer, its officers, directors, employees and agents, and their respective
     successors and assigns from, against and in respect of any and all losses,
     liabilities, deficiencies, penalties, fines, costs, damages and expenses
     whatsoever (including without limitation, reasonable professional fees and
     costs of investigation, litigation, settlement, and judgment and interest)
     (collectively, "Losses") that is suffered or incurred by any of them
     arising from or by reason of any of the following:

               (1)  Any breach of any representation, warranty, covenant or
          agreement made by the Company in this Agreement or contained in any
          certificate executed by the Company and delivered to the Buyer in
          connection with this Agreement;

               (2)  Any claims of any broker, investment banker, Person or firm
          acting on behalf of the Company for a broker's or finder's fee or any
          other commission or similar fee arising in connection with the
          transactions contemplated hereby;

               (3)  Any and all actions, suits, proceedings, claims, demands,
          assessments, judgments, costs and expenses (including without
          limitation, interest, penalties, reasonable legal fees and accounting
          fees) incident to the foregoing and the enforcement of the provisions
          of this Section 10.1.

          (B)  Subject to the limitations hereinafter set forth in this Section
     10.1, the Buyer shall protect, defend, hold harmless and indemnify the
     Company, its officers, directors, employees and agents, and its respective
     successors and assigns, from, against and in respect of any and all Losses
     that is suffered or incurred by any of them arising from or by reason of
     any of the following:

               (1)  Any breach of any representation, warranty, covenant or
          agreement made by the Buyer in this Agreement or contained in any
          certificate executed by the Buyer and delivered to the Company in
          connection with this Agreement;

               (2)  Any claims of any broker, investment banker, Person or firm
          acting on behalf of the Buyer for a broker's or finder's fee or any
          other commission or similar fee arising in connection with the
          transactions contemplated hereby; and

               (3)  Any and all actions, suits, proceedings, claims, demands,
          assessments,

                                              MCI CONFIDENTIAL
                                      23

 
          judgments, costs and expenses (including without limitation, interest,
          penalties, reasonable legal fees and accounting fees) incident to the
          foregoing and the enforcement of the provisions of this Section 10.1.

          (C)  Each of the Buyer and the Company shall be liable to the other
     for any Losses arising under this Agreement or caused by any breach of a
     representation or warranty made by such party as to which the Buyer or
     Company is otherwise entitled to indemnity under this Agreement only up to
     the amount of the Purchase Price.

          (D)  For purposes of this Section 10.1, any assertion of fact and/or
     law by a third party that, if true, would constitute a breach of a
     representation or warranty made by a party to this Agreement or make
     operational an indemnification obligation hereunder, shall, on the date
     that such assertion is made, immediately invoke that party's obligation to
     protect, defend, hold harmless and indemnify the other party to this
     Agreement pursuant to this Section 10.1.

     70.1  Indemnification Procedures.  All claims for indemnification under
           --------------------------                                       
this Agreement shall be asserted and resolved as follows:

          (A)  A party claiming indemnification under this Agreement (an
     "Indemnified Party") shall promptly (i) notify the party from whom
     indemnification is sought (the "Indemnifying Party") of any third-party
     claim ("Third Party Claim") asserted against the Indemnified Party which
     could give rise to a right of indemnification under this Agreement and (ii)
     transmit to the Indemnifying Party a written notice ("Claim Notice")
     describing in reasonable detail the nature of the Third Party Claim, a copy
     of all papers served with respect to such claim (if any), an estimate of
     the amount of damages attributable to the Third Party Claim, if reasonably
     possible, and the basis of the Indemnified Party's request for
     indemnification under this Agreement.

          (B)  Within thirty (30) days after receipt of any Claim Notice (the
     "Election Period"), the Indemnifying Party shall notify the Indemnified
     Party (i) whether the Indemnifying Party disputes its potential liability
     to the Indemnified Party under this Article X with respect to such Third
     Party Claim and (ii) whether the Indemnifying Party desires, at the sole
     cost and expense of the Indemnifying Party, to defend the Indemnified Party
     against such Third Party Claim.

          (C)  If the Indemnifying Party notifies the Indemnified Party within
     the Election Period that the Indemnifying Party does not dispute its
     potential liability to the Indemnified Party under this Article X and that
     the Indemnifying Party elects to assume the defense of the Third Party
     Claim, then the Indemnifying Party shall have the right to defend, at its
     sole cost and expense, such Third Party Claim by all appropriate
     proceedings, which proceedings shall be prosecuted diligently by the
     Indemnifying Party to a final conclusion or settled at the discretion of
     the Indemnifying Party in accordance with this Section 10.2.  The
     Indemnifying Party shall have full control of such defense and proceedings
     including any compromise or settlement thereof; provided that any

                                              MCI CONFIDENTIAL
                                      24

 
     non-monetary aspect of any settlement shall require the consent of the
     Buyer, which consent shall not be unreasonably withheld or delayed.  The
     Indemnified Party is hereby authorized, at the sole cost and expense of the
     Indemnifying Party (but only if the Indemnified Party consents, which
     consent shall not be unreasonably withheld), to file, during the Election
     Period, any motion, answer or other pleadings which the Indemnified Party
     shall deem necessary or appropriate to protect its interests or those of
     the Indemnifying Party.  If requested by the Indemnifying Party, the
     Indemnified Party shall, at the sole cost and expense of the Indemnifying
     Party, cooperate with the Indemnifying Party and its counsel in contesting
     any Third Party Claim which the Indemnifying Party elects to contest.  The
     Indemnified Party may participate in, but not control, any defense or
     settlement of any Third Party Claim controlled by the Indemnifying Party
     pursuant to this Section 10.2 and, except as permitted above, shall bear
     its own costs and expenses with respect to such participation.


          (D)  If the Indemnifying Party fails to notify the Indemnified Party
     within the Election Period that the Indemnifying Party elects to defend the
     Indemnified Party pursuant to this Section 10.2, or if the Indemnifying
     Party elects to defend the Indemnified Party pursuant to this Section 10.2
     but fails to diligently prosecute or settle the Third Party Claim, then the
     Indemnified Party shall have the right to defend, at the sole cost and
     expense of the Indemnifying Party, the Third Party Claim by all appropriate
     proceedings.  The Indemnified Party shall have full control of such defense
     and proceedings; provided, however, that the Indemnified Party may not
     enter into, without the Indemnifying Party's consent, which shall not be
     unreasonably withheld or delayed, any compromise or settlement of such
     Third Party Claim.  The Indemnifying Party may participate in, but not
     control, any defense or settlement controlled by the Indemnified Party
     pursuant to this Section 10.2, and the Indemnifying Party shall bear its
     own costs and expenses with respect to such participation.

          (E)  In the event an Indemnified Party should have a claim against an
     Indemnifying Party hereunder which does not involve a Third Party Claim,
     the Indemnified Party shall transmit to the Indemnifying Party a written
     notice (the "Indemnity Notice") describing in reasonable detail the nature
     of the claim, an estimate of the amount of damages attributable to such
     claim and the basis of the Indemnified Party's request for indemnification
     under this Agreement.  If the Indemnifying Party does not notify the
     Indemnified Party within sixty (60) days from its receipt of the Indemnity
     Notice that the Indemnifying Party disputes such claim, the claim specified
     by the Indemnified Party in the Indemnity Notice shall be deemed a
     liability of the Indemnifying Party hereunder.  If the Indemnifying Party
     has timely disputed such claim, as provided above, such dispute shall be
     resolved by litigation in an appropriate court of competent jurisdiction.

          (F)  Payments of all amounts owing by the Indemnifying Party pursuant
     to Sections 10.2(C) and (D) shall be made within thirty (30) days after the
     latest of (i) the

                                              MCI CONFIDENTIAL
                                      25

 
     settlement of the Third Party Claim, (ii) the expiration of the period for
     appeal of a final adjudication of such Third Party Claim or (iii) the
     expiration of the period for appeal of a final adjudication of the
     Indemnifying Party's liability to the Indemnified Party under this
     Agreement.  Payments of all amounts owing by the Indemnifying Party
     pursuant to Section 10.2(E) shall be made within thirty (30) days after the
     later of (i) the expiration of the sixty-day Indemnity Notice period or
     (ii) the expiration of the period for appeal of a final adjudication of the
     Indemnifying Party's liability to the Indemnified Party under this
     Agreement.

          (G)  The failure to provide notice as provided in this Section 10.2
     shall not excuse any party from its continuing obligations hereunder;
     however, any claim shall be reduced by the damages resulting from such
     party's delay or failure to provide notice as provided in this Section
     10.2.

     71.1  Confidentiality.  Notwithstanding the termination of this Agreement,
           ---------------                                                     
each party hereto and its respective accountants, attorneys, employees and other
agents, will keep confidential all information, oral and written, obtained from
any other party hereto or its Affiliates and refrain from using in any manner
all information set forth above in accordance with that certain Nondisclosure
Agreement between the Company and the Buyer dated October 29, 1996.

     72.1  Further Assurances.  Each party hereto shall cooperate with the
           ------------------                                             
others, and execute and deliver, or cause to be executed and delivered, all such
other instruments, including instruments of conveyance, assignment and transfer,
and take all such other actions as may be reasonably requested by the other
parties hereto from time to time, consistent with the terms of this Agreement,
to effectuate the purposes and provisions of this Agreement.


                          ARTICLE 73 -- MISCELLANEOUS

     74.1  Survival of Representations, Warranties and Agreements.  All
           ------------------------------------------------------      
representations and warranties of the Buyer and the Company contained in
Articles V and VI herein and in any certificate executed and delivered by either
the Buyer or the Company in connection with this Agreement shall survive the
Closing Date and shall terminate and expire one (1) year from the Closing Date.
All agreements of the parties contemplating performance after the Closing Date
shall survive the Closing Date for a period equal to ninety (90) days after the
expiration of the applicable statute of limitations for any claim relating
thereto.

     75.1  Service of Process.  Service of process on the Company or the Buyer
           ------------------                                                 
for any claim, legal action or proceeding under this Agreement may be made in
the manner set forth in Section 11.3.

     76.1  Notices.  All notices, requests, consents and other communications
           -------                                                           
hereunder shall be deemed given if delivered personally (including by courier),
telecopied (which is confirmed) or mailed by registered or certified mail
(return receipt requested) to the parties at the following addresses or to other
such addresses as may be furnished in writing by one party to the others:

                                              MCI CONFIDENTIAL
                                      26

 
          (A)  if to the Company:

          Genesys Telecommunications Laboratories, Inc.
          1155 Market Street, 11th Floor
          San Francisco, California  94103
          Attention:  Gregory Shenkman and Richard C. DeGolia

          with a copy to:

          Brobeck Phleger & Harrison LLP
          Two Embarcadero Place
          2200 Geng Road
          Palo Alto, California  94303
          Attention:  Edward M. Leonard, Esq.



          (B)  If to the Buyer:

          MCI Telecommunications Corporation
          1801 Pennsylvania Avenue, N.W.
          Washington, D.C.  20006
          Attention:  President, networkMCI Services

          with a copy to:

          MCI Communications Corporation
          1801 Pennsylvania Avenue, N.W.
          Washington, D.C.  20006
          Attention:  General Counsel

     77.1  Governing Law.  This Agreement shall be governed by, and construed in
           -------------                                                        
accordance with, the laws of the State of California, without regard to such
jurisdiction's conflicts of law principles.  The parties agree that venue or any
suit, action, proceeding or litigation arising out of or in relation to this
Agreement shall be in any federal or state court in the State of California
having subject matter jurisdiction.

     78.1  Modification; Waiver.  This Agreement shall not be altered or
           --------------------                                         
otherwise amended except pursuant to an instrument in writing signed by the
Buyer and the Company.  Any party may waive any misrepresentation by any other
party, or any breach of warranty by, or failure to perform any covenant,
obligation or agreement of, any other party, provided that mere inaction or
                                             --------                      
failure to exercise any right, remedy or option under this Agreement, or
delaying in exercising the same, will not operate as nor shall be construed as a
waiver, and no waiver will be effective

                                              MCI CONFIDENTIAL
                                      27

 
unless set forth in writing and only to the extent specifically stated therein.

     79.1  Entire Agreement.  This Agreement, the Schedules and Exhibits hereto,
           ----------------                                                     
and any other agreements or certificates delivered pursuant hereto constitute
the entire agreement of the parties hereto with respect to the matters
contemplated hereby and supersede all previous written or oral negotiations,
commitments, representations and agreements (provided however that the
Nondisclosure Agreement between the parties dated October 29, 1996 shall remain
in full force and effect).

     80.1  Assignment; Successors and Assigns.  This Agreement may not be
           ----------------------------------                            
assigned by either Party without the prior written consent of the other Party,
except that Buyer may assign this Agreement to its subsidiaries or affiliates.
All covenants, representations, warranties and agreements of the parties
contained herein shall be binding upon and inure to the benefit of their
respective successors and permitted assigns.

     81.1  Public Announcements.  No public announcement of the transactions
           --------------------                                             
contemplated hereby or of the terms hereof shall be made by the parties to this
Agreement without the written consent, such consent not to be unreasonably
withheld or delayed, of the Buyer and the Company, except to the extent required
by law.  The parties expressly agree that a public announcement shall be deemed
to include a description of the transactions contemplated hereby contained in
any registration statement filed by the Company with the Securities and Exchange
Commission.

     82.1  Severability.  The provisions of this Agreement are severable, and in
           ------------                                                         
the event that any one or more provisions are deemed illegal or unenforceable,
the remaining provisions shall remain in full force and effect, provided that no
such severability shall be effective if it materially changes the economic
benefits of this Agreement to either party.

     83.1  No Third Party Beneficiary.  This Agreement is intended and agreed to
           --------------------------                                           
be solely for the benefit of the parties hereto and their stockholders, and no
other party shall accrue any benefit, claim or right of any kind whatsoever
pursuant to, under, by or through this Agreement.

     84.1  Expenses.  Except as otherwise expressly provided herein, each party
           --------                                                            
to this Agreement will pay its own expenses in connection with the negotiation
of this Agreement, the performance of its obligations hereunder, and the
consummation of the transactions contemplated herein.

     85.1  Execution in Counterpart.  This Agreement may be executed in one or
           ------------------------                                           
more counterparts, each of which shall be deemed an original, but all of which
shall constitute one and the same instrument.


              THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK

                                              MCI CONFIDENTIAL
                                      28

 
               IN WITNESS WHEREOF, the parties have executed this Securities
Purchase Agreement as of the date first written above.


                              MCI TELECOMMUNICATIONS CORPORATION



                              By: /s/ John W. Gerdelman
                                  ---------------------------------
                                  Name:  John W. Gerdelman
                                  Title: Executive Vice President



                              GENESYS TELECOMMUNICATIONS 
                              LABORATORIES, INC.



                              By: /s/ Richard C. DeGolia
                                 ----------------------------------
                                 Name:  Richard C. DeGolia
                                 Title: Vice President


CONFIDENTIAL