TRESCOM INTERNATIONAL INC
8-K, 1998-02-09
TELEGRAPH & OTHER MESSAGE COMMUNICATIONS
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                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549



                                    FORM 8-K

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



       Date of report (Date of earliest event reported): February 3, 1998


                           TRESCOM INTERNATIONAL, INC.
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)


         Florida                         0-27594                 65-0454571
(STATE OR OTHER JURISDICTION          (Commission              (IRS Employer
     OF INCORPORATION)                File Number)           Identification No.)


                          200 EAST BROWARD BOULEVARD,              33301
                            FT. LAUDERDALE, FLORIDA             (Zip Code)
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)



       Registrant's telephone number, including area code: (954) 763-4000



<PAGE>



ITEM 5.           OTHER EVENTS.

                  On  February  3,  1998,   Primus   Telecommunications   Group,
Incorporated  (the  "Company"),   Taurus  Acquisition  Corporation,   a  Florida
corporation and a wholly-owned  subsidiary of the Company  ("TAC"),  and TresCom
International,   Inc.,  a  Florida  corporation  ("TresCom"),  entered  into  an
Agreement and Plan of Merger (the "Merger  Agreement"),  which  provides,  among
other things, for the merger (the "Merger") of TAC with and into TresCom.

                  Under the terms of the Merger Agreement,  TresCom stockholders
will receive  shares of the  Company's  common stock in exchange for the TresCom
common  stock held by the  TresCom  stockholders  at the  effective  time of the
Merger. The Merger Agreement provides for an exchange of TresCom common stock at
a ratio  that is  subject  to  certain  adjustments  based upon the price of the
Company's  common stock.  If the average  trading price of the Company's  common
stock as of the  closing  date is $15.89 or higher,  TresCom  stockholders  will
receive Company common stock valued at $10.00 per share of TresCom common stock.
If the price of the Company's common stock is lower than $15.89, the value to be
received for each TresCom share will be adjusted  downward.  If the price of the
Company's  common stock is less than $14.02,  TresCom may  terminate  the Merger
Agreement,  subject to the  Company's  option to override such  termination  and
reinstate  the Merger  Agreement  by  agreeing  to pay to each holder of TresCom
shares  additional  consideration (in cash or in shares of Company common stock,
or a combination thereof),  such that each holder of TresCom shares will receive
an aggregate value of $8.82 for each TresCom share exchanged in the Merger. Upon
consummation of the Merger, TresCom will become a wholly-owned subsidiary of the
Company.

                  The  transaction  is  contingent  upon,  among  other  things,
approval by both the Company's and TresCom's  stockholders,  certain  regulatory
approvals (including approval under the Hart-Scott-Rodino Antitrust Improvements
Act of 1976 and  various  telecommunications  regulatory  approvals)  and  other
customary  conditions,  and is  expected to close  during the second  quarter of
1998.  The Merger is  intended to  constitute  a tax-free  reorganization  under
Section 368(a)(2)(E) of the Internal Revenue Code of 1986.

                  Warburg, Pincus Investors,  L.P. ("Warburg"),  which currently
owns  approximately 52% of the outstanding shares of TresCom's common stock, has
agreed to vote its shares of TresCom in favor of the Merger.  In  addition,  two
stockholders of TresCom and two  stockholders of the Company have agreed to vote
their  shares  in favor of the  Merger.  Warburg  has also  agreed to pay to the
Company 50% of any  increase in price it would  receive if a superior  offer (as
determined  in the Merger  Agreement)  is  accepted by the  Company.  The Merger
Agreement  also grants a reciprocal  break-up fee of  $5,000,000  under  certain
conditions of termination.



                                       -2-

<PAGE>



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

          2.1    Agreement and Plan of Merger by and among TAC, TresCom and  the
                 Company, dated as of February 3, 1998.

         10.1    Stockholder Agreement by and  among  the  Company, TAC, K. Paul
                 Singh and Warburg, dated as of February 3, 1998.

         10.2    Voting Agreement  by  and  between  TresCom  and K. Paul Singh,
                 dated as of February 3, 1998.

         10.3    Voting Agreement by and between TresCom  and John F. DePodesta,
                 dated as of February 3, 1998.

         10.4    Voting Agreement  by  and  between  the  Company  and Wesley T.
                 O'Brien, dated as of February 3, 1998.

         10.5    Voting Agreement by and between the Company and Rudy McGlashan,
                 dated as of February 3, 1998.


                                       -3-

<PAGE>



                                   SIGNATURES


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


                                      TRESCOM INTERNATIONAL, INC.



Date: February 6, 1998                By:  /s/ Wesley T. O'Brien
                                           -------------------------------------
                                           Wesley T. O'Brien
                                           President and Chief Executive Officer




                                       -4-

<PAGE>


                                  EXHIBIT INDEX


EXHIBIT NO.                         DESCRIPTION


 2.1             Agreement and Plan of Merger by and among TAC, TresCom and the
                 Company, dated as of February 3, 1998.

10.1             Stockholder Agreement by and among the Company, TAC, K. Paul 
                 Singh and Warburg, dated as of February 3, 1998.

10.2             Voting Agreement by and between TresCom and K. Paul Singh, 
                 dated as of February 3, 1998.

10.3             Voting Agreement by and between TresCom and John F. DePodesta,
                 dated as of February 3, 1998.

10.4             Voting Agreement by and between the Company and Wesley T. 
                 O'Brien, dated as of February 3, 1998.

10.5             Voting Agreement by and between the Company and Rudy McGlashan,
                 dated as of February 3, 1998.






                         AGREEMENT AND PLAN OF MERGER

      Agreement and Plan of Merger (the "AGREEMENT") entered into as of February
3,  1998,  by and  among  Primus  Telecommunications  Group,  Inc.,  a  Delaware
corporation  (the  "PURCHASER"),   Taurus  Acquisition  Corporation,  a  Florida
corporation  and a  wholly-owned  Subsidiary  of the Purchaser  (the  "PURCHASER
SUBSIDIARY"),  and  TresCom  International,  Inc.,  a Florida  corporation  (the
"TARGET").  The Purchaser,  the Purchaser Subsidiary and the Target are referred
to collectively herein as the "PARTIES."

                                  WITNESSETH:

      WHEREAS, this Agreement  contemplates a transaction in which the Purchaser
will acquire all of the outstanding capital stock of the Target through a merger
of the Purchaser Subsidiary with and into the Target.

      WHEREAS,  each  Board  of  Directors  of  the  Purchaser,   the  Purchaser
Subsidiary  and the Target has  approved  the  acquisition  of the Target by the
Purchaser,  including the merger of the Purchaser  Subsidiary  with and into the
Target (the  "MERGER"),  upon the terms and subject to the  conditions set forth
herein;

      WHEREAS,  the Board of  Directors  of the Target has  determined  that the
Merger  is fair to and in the best  interests  of the  holders  of the  Target's
common  stock,  par value  $0.0419  per share  (the  "TARGET  SHARES"),  and has
resolved to recommend  the  acceptance  and approval of the Merger by the Target
Stockholders (as defined in Section 1 below);

      WHEREAS,  the Board of Directors of the Purchaser has determined  that the
Merger is fair to and in the best  interests  of the holders of the  Purchaser's
common  stock,  par value  $0.01 per share  (the  "PURCHASER  SHARES"),  and has
resolved to recommend the acceptance and approval of the Merger by the Purchaser
Stockholders (as defined in Section 1 below);

      WHEREAS,  to induce the Purchaser  and the  Purchaser  Subsidiary to enter
into this Agreement,  the Purchaser, the Purchaser Subsidiary and K. Paul Singh,
the Chairman of the Board and Chief  Executive  Officer of the  Purchaser,  have
entered into a Stockholder Agreement (the "STOCKHOLDER AGREEMENT") with Warburg,
Pincus,  Investors,  L.P. (the "Stockholder") pursuant to which the Stockholder,
among other things,  has agreed to vote its Target Shares in favor of the Merger
and has granted the Purchaser  Subsidiary an option to purchase  certain  Target
Shares beneficially owned by the Stockholder,  the Purchaser has agreed to grant
certain  registration  rights  to the  Stockholder,  and the  Purchaser's  Chief
Executive Officer has granted certain other rights to the Stockholder,  all upon
the terms and subject to the conditions set forth in the Stockholder Agreement;

      WHEREAS,  to induce the Purchaser and the Purchaser  Subsidiary on the one
hand,  and the Target on the other hand, to enter into this  Agreement,  certain
other stockholders of the Target and the Purchaser,  respectively,  have entered
into voting agreements, pursuant to which such stockholders, among other things,
have agreed to vote their shares in favor of the Merger,  all upon the terms and
subject to the conditions set forth in said agreements;


<PAGE>




      WHEREAS,  this Agreement  contemplates a tax-free  merger of the Purchaser
Subsidiary  with  and into  the  Target  in a  reorganization  pursuant  to Code
Section 368(a)(2)(E),  and the Target  Stockholders  will  receive capital stock
in the Purchaser in exchange for their capital stock in the Target;

      NOW,  THEREFORE,  in consideration of the premises and the mutual promises
set forth herein,  and in consideration of the  representations,  warranties and
covenants set forth herein, the Parties agree as follows:

            1.    DEFINITIONS.

            "ACQUISITION  PROPOSAL"  means  any  proposal  or offer  (including,
without limitation,  any proposal or offer to Target  Stockholders) with respect
to  a  merger,  acquisition,  consolidation,  recapitalization,  reorganization,
tender offer or exchange offer or similar transaction involving, or any purchase
of all or any  significant  portion of the  assets  of, or any  equity  interest
representing 25% or more of the outstanding  Target Shares in, the Target or any
of its material Subsidiaries.

            "ADDITIONAL CONSIDERATION" has the meaning set forth in Section 
7(a)(vi) below.

            "AFFILIATE"  has  the  meaning  set  forth  in  Rule  12b-2  of  the
regulations promulgated under the Securities Exchange Act; PROVIDED, HOWEVER, in
the case of the  Target or the  Stockholder,  (i) no  portfolio  company  of the
Stockholder or of any related venture fund, (ii) no  representative  or employee
of the  Stockholder  or of any related  venture  fund serving as a member of the
board of  directors  on any such  portfolio  company,  and  (iii) no  registered
broker-dealer or any other Affiliated entity of Stockholder that is a registered
investment adviser, as well as certain registered  investment companies that may
be deemed to be Affiliates of the Stockholder,  shall be considered an Affiliate
of the Target or the Stockholder for purposes of this Agreement.

            "AGREEMENT" has the meaning set forth in the preambles.

            "ARTICLES OF MERGER" has the meaning set forth in Section 2(c) 
below.

            "BENEFIT PLAN"  and "BENEFIT PLANS" has the meaning set forth in
Section 3(m)(i).

            "BLUE SKY FILINGS" has the meaning set forth in Section 5(c)(i).

            "CLOSING" has the meaning set forth in Section 2(b) below.

            "CLOSING DATE" has the meaning set forth in Section 2(b) below.

            "CODE" has the meaning set forth in Section 3(m)(ii).

            "COMMON STOCK" has the meaning set forth in the preambles.


                                    - 2 -

<PAGE>


            "CONFIDENTIALITY  AGREEMENT"  means the letter agreement dated March
21, 1997 between the  Purchaser  and The  Robinson-Humphrey  Company,  Inc.,  as
representative  of the Target,  providing that,  among other things,  each Party
would maintain confidential certain information of the other Party.

            "CONFIDENTIAL INFORMATION" means Confidential  Evaluation  Material,
as defined in the Confidentiality Agreement.

            "DELAWARE  GENERAL  CORPORATION LAW" means Title 8, Chapter 1 of the
Delaware Code, as amended.

            "EFFECTIVE TIME" has the meaning set forth in Section 2(d)(i) below.

            "EMPLOYEES" has the meaning set forth in Section 3(m)(i).

            "ERISA" has the meaning set forth in Section 3(m)(i).

            "ERISA AFFILIATE" has the meaning set forth in Section 3(m)(iii).

            "EXCHANGE AGENT" has the meaning set forth in Section 2(e)(i).

            "EXCHANGE FUND" has the meaning set forth in Section 2(e)(i).

            "EXCHANGE RATIO" has the meaning set forth in Section 2(d)(v).

            "FLORIDA  BUSINESS  CORPORATION LAW"  means  the  Florida   Business
Corporation Act, as amended.

            "GAAP" means United States generally accepted accounting  principles
as in effect from time to time.

            "HART-SCOTT-RODINO  ACT"  means  the   Hart-Scott-Rodino   Antitrust
Improvements Act of 1976, as amended.

            "INDEMNIFIED PARTY" has the meaning  set  forth  in Section 5(h)(ii)
below.

            "JOINT PROXY STATEMENT/PROSPECTUS" has  the  meaning  set  forth  in
Section 5(c)(i) below.

            "MERGER" has the meaning set forth in the preambles.

            "NASDAQ" has the meaning set forth in Section 5(c)(ii) below.

            "ORDER" has the meaning set forth in Section 6(a)(v) below.

            "OUTSTANDING DEBT" has the meaning  set  forth  in  Section 5(d)(iv)
below.


                                    - 3 -

<PAGE>



            "PARTY" has the meaning set forth in the preambles.

            "PENSION PLAN"  has the meaning set forth in Section 3(m)(ii).

            "PERSON"  means an  individual,  a  partnership,  a  corporation,  a
limited liability  company,  an association,  a joint stock company,  a trust, a
joint venture,  an unincorporated  organization or a governmental entity (or any
department, agency or political subdivision thereof).

            "PER  SHARE  MERGER  CONSIDERATION"  has  the  meaning  set forth in
Section 2(d)(v) below.

            "POTENTIAL BUYER" has the meaning set forth in Section  5(g) below.

            "PURCHASE  WARRANT"  means that certain  warrant to purchase  Target
Shares issued to the Stockholder and dated October 2, 1995.

            "PURCHASER" has the meaning set forth in the preambles.

            "PURCHASER 10-K" has the meaning set forth in Section 4(f) below.

            "PURCHASER 10-Q" has the meaning set forth in Section 4(f) below.

            "PURCHASER BOARD" means the board of directors of the Purchaser.

            "PURCHASER  COMPANIES" means the Purchaser, the Purchaser Subsidiary
and any of their respective Affiliates.

            "PURCHASER  DISCLOSURE  LETTER" has the meaning set forth in Section
4(a) below.

            "PURCHASER  FAIRNESS  OPINION"  means an opinion  of BT Alex.  Brown
Incorporated, addressed to the Purchaser Board, as to the fairness of the Merger
to the Purchaser from a financial point of view.

            "PURCHASER REPORTS" has the meaning set forth in Section 4(e) below.

            "PURCHASER SHARES" has the meaning set forth in the preambles.

            "PURCHASER  SPECIAL  MEETING" has  the  meaning set forth in Section
5(c)(ii) below.

            "PURCHASER STOCKHOLDER"  means  any  Person  who  or which holds any
Purchaser Shares.

            "PURCHASER SUBSIDIARY" has the meaning set forth in the preambles.

            "PURCHASER-OWNED  SHARE" means any Target Share that is beneficially
owned by any Purchaser Company.


                                    - 4 -

<PAGE>




            "PURCHASER'S  MOST RECENT  AUDITED  FISCAL YEAR END" has the meaning
set forth in Section 4(f) below.

            "REGISTRATION  STATEMENT"  has  the  meaning  set  forth  in Section
5(c)(i) below.

            "REQUISITE  STOCKHOLDER APPROVAL" means, with respect to the Target,
the  affirmative  vote of the  holders of a majority of the  outstanding  Target
Shares in favor of this Agreement and the Merger in accordance  with the Florida
Business  Corporation  Law, or, with respect to the Purchaser,  the  affirmative
vote of the holders of a majority of the outstanding  Purchaser  Shares in favor
of this  Agreement  and the  Merger  in  accordance  with the  Delaware  General
Corporation Law.

            "SEC" means the Securities and Exchange Commission.

            "SECURITIES  ACT" means the Securities Act of 1933, as amended,  and
the rules and regulations promulgated thereunder.

            "SECURITIES EXCHANGE ACT" means the Securities Exchange Act of 1934,
as amended, and the rules and regulations promulgated thereunder.

            "SECURITY INTEREST" means any mortgage,  pledge, lien,  encumbrance,
charge or other security interest, OTHER THAN (a) mechanic's,  materialman's and
similar liens; (b) liens for taxes not yet due and payable or for taxes that the
taxpayer  is  contesting  in good faith  through  appropriate  proceedings;  (c)
purchase  money liens and liens  securing  rental  payments  under capital lease
arrangements; and (d) other liens arising in the ordinary course of business and
not incurred in connection with the borrowing of money.

            "STOCK  RIGHTS"  means  each  option,   warrant,   purchase   right,
subscription  right,   conversion  right,  exchange  right  or  other  contract,
commitment or security  providing for the issuance or sale of any capital stock,
or otherwise causing to become outstanding any capital stock.

            "STOCKHOLDER" has the meaning set forth in the preambles.

            "STOCKHOLDER AGREEMENT" has the meaning set forth in the preambles.

            "SUBSIDIARY" means any corporation with respect to which a specified
Person  (or a  Subsidiary  thereof)  owns a  majority  of the  voting  stock  or
otherwise has the power to vote or direct the voting of sufficient securities to
elect a majority of the directors.

            "SURVIVING CORPORATION" has the meaning set forth  in  Section  2(a)
below.

            "TARGET" has the meaning set forth in the preambles.

            "TARGET 10-K" has the meaning set forth in Section 3(f) below.


                                    - 5 -

<PAGE>


            "TARGET 10-Q" has the meaning set forth in Section 3(f) below.

            "TARGET BOARD" means the board of directors of the Target.

            "TARGET DISCLOSURE LETTER" has the meaning set forth in Section 3(a)
below.

            "TARGET FAIRNESS OPINION" means an opinion of The  Robinson-Humphrey
Company,  Inc.,  addressed to the Target Board, as to the fairness of the Merger
to the Target Stockholders from a financial point of view.

            "TARGET REPORTS" has the meaning set forth in Section 3(e) below.

            "TARGET SHARES" has the meaning set forth in the preambles.

            "TARGET SPECIAL MEETING" has the meaning set forth in Section 
5(c)(ii) below.

            "TARGET STOCKHOLDER" means any Person who or which  holds any Target
Shares.

            "TARGET'S  MOST RECENT  AUDITED FISCAL YEAR END" has the meaning set
forth in Section 3(f) below.


            "TAX  RETURN"  means  any  report,  return,   declaration  or  other
information  required to be supplied to a taxing  authority in  connection  with
Taxes.

            "TAXES" means all taxes or other like assessments including, without
limitation,  income,  withholding,  gross  receipts,  excise,  real or  personal
property, asset, sales, use, license, payroll,  transaction,  capital, net worth
and franchise taxes imposed by or payable to any federal,  state,  county, local
or  foreign  government,  taxing  authority,   subdivision  or  agency  thereof,
including interest, penalties, additions to tax or additional amounts thereto.

            "VALUATION PERIOD" has the meaning  set  forth  in  Section  2(d)(v)
below.

            "WEIGHTED  AVERAGE SALES PRICE OF A PURCHASER SHARE" has the meaning
set forth in Section 2(d)(v) below.

            2.    THE TRANSACTION.

                  (a) THE MERGER.  On and subject to the terms and conditions of
this Agreement,  the Purchaser Subsidiary will merge with and into the Target at
the Effective  Time.  The Target shall be the  corporation  surviving the Merger
(the "SURVIVING CORPORATION").

                  (b) THE CLOSING. The closing of the transactions  contemplated
by this Agreement (the "CLOSING") shall take place at the offices of Kelley Drye
& Warren LLP, 101 Park Avenue, New York, New York, commencing at 9:00 a.m. local
time on the third  business  day  following  the  satisfaction  or waiver of all
conditions to the obligations of the Parties  to  consummate  the   transactions

                                    - 6 -

<PAGE>



contemplated   hereby  (other  than  conditions  with  respect  to  actions  the
respective  Parties  will take at the Closing  itself) or such other date as the
Parties may mutually determine (the "CLOSING DATE").

                  (c) ACTIONS AT THE  CLOSING.  At the  Closing,  (i) the Target
will  deliver  to  the  Purchaser  and  the  Purchaser  Subsidiary  the  various
certificates,  instruments and documents referred to in Section 6(a) below; (ii)
the  Purchaser  and the  Purchaser  Subsidiary  will  deliver  to the Target the
various  certificates,  instruments  and  documents  referred to in Section 6(b)
below;  (iii)  the  Target  and the  Purchaser  Subsidiary  will  file  with the
Department  of State of the  State of  Florida  Articles  of  Merger in the form
attached hereto as Exhibit A (the "ARTICLES OF MERGER");  and (iv) the Purchaser
will deliver the  Exchange  Fund to the  Exchange  Agent in the manner  provided
below in this Section 2.

                  (d) EFFECT OF MERGER.

                        (i)   GENERAL.  The Merger shall become effective at the
time (the  "EFFECTIVE  TIME") the Target and the Purchaser  Subsidiary  file the
Articles of Merger  with the  Department  of State of the State of Florida.  The
Merger shall have the effect set forth in the Florida Business  Corporation Law.
The Surviving  Corporation  may, at any time after the Effective  Time, take any
action  (including  executing  and  delivering  any document) in the name and on
behalf of either the Target or the  Purchaser  Subsidiary  in order to carry out
and effectuate the transactions contemplated by this Agreement.

                        (ii)  ARTICLES  OF  INCORPORATION.   The   Articles   of
Incorporation   of  the   Surviving   Corporation   shall  be  the  Articles  of
Incorporation of the Purchaser Subsidiary, except that its name shall be changed
to TresCom International, Inc.

                        (iii) BYLAWS.  The Bylaws of the  Surviving  Corporation
shall be amended and restated at and as of the Effective Time to read as did the
Bylaws of the  Purchaser  Subsidiary  immediately  prior to the  Effective  Time
(except   that  the  name  of  the   Surviving   Corporation   will  be  TresCom
International, Inc.).

                        (iv)  DIRECTORS AND OFFICERS. The directors and officers
of the  Purchaser  Subsidiary  shall  become the  directors  and officers of the
Surviving  Corporation  at  and  as  of  the  Effective  Time  (retaining  their
respective positions and terms of office).

                        (v)   CONVERSION OF TARGET SHARES   At  and  as  of  the
Effective  Time,  (A) each issued and  outstanding  Target Share (other than any
Purchaser-owned  Shares)  shall be  converted  into the right to receive the Per
Share  Merger  Consideration,  and all such  Target  Shares  shall no  longer be
outstanding,  shall be canceled  and  retired,  shall  cease to exist,  and each
holder of a certificate  representing  any such Target  Shares shall  thereafter
cease to have any rights with respect to such Target Shares, except the right to
receive  the Per Share  Merger  Consideration  for such  Target  Shares upon the
surrender of such  certificate  in accordance  with Section 2(e) below,  and (B)
each  Purchaser-owned  Share and each Target  Share held in the  treasury of the
Target or by any  Subsidiary  of the Target  shall be canceled  without  payment
therefor;  PROVIDED,  HOWEVER,  that the Per Share Merger Consideration shall be


                                    - 7 -

<PAGE>



subject  to  proportionate  adjustment  in the event of any stock  split,  stock
dividend  or  reverse  stock  split.  No  Target  Share  shall be  deemed  to be
outstanding  or to have any  rights  other  than  those set forth  above in this
Section  2(d)(v) after the Effective  Time. As used herein,  the term "PER SHARE
MERGER  CONSIDERATION"  shall mean that number of Purchaser Shares determined by
applying  to  each  Target  Share  an  exchange  ratio  (the  "EXCHANGE  RATIO")
determined as follows:  In the event that the Weighted  Average Sales Price of a
Purchaser Share as of the Closing Date is greater than or equal to $15.8905, the
Exchange Ratio shall be the quotient of $10.00  divided by the Weighted  Average
Sales Price of a Purchaser  Share as of the Closing  Date;  and (B) in the event
that the  Weighted  Average  Sales Price of a Purchaser  Share as of the Closing
Date is less than  $15.8905,  the  Exchange  Ratio  shall be  0.6293,  PROVIDED,
HOWEVER,  that in the event that the Weighted Average Sales Price of a Purchaser
Share as of the  Closing  Date is less than  $14.0210,  the  Target  shall  have
certain  termination  rights as set forth in  Section  7(a)(vi),  subject to the
rights  of the  Purchaser  to  override  such  termination  as set forth in such
Section  7(a)(vi).   Notwithstanding   anything  in  this  Section  2(d)(v),  no
fractional Purchaser Shares shall be issued to holders of Target Shares. In lieu
thereof,  each holder of shares of Target Shares who would  otherwise  have been
entitled to receive a fraction of a Purchaser  Share (after  taking into account
all  certificates  delivered  by such holder at any one time)  shall  receive an
amount in cash equal to such  fraction of a Purchaser  Share,  multiplied by the
Weighted  Average  Sales  Price of a  Purchaser  Share as of the  Closing  Date.
"WEIGHTED  AVERAGE SALES PRICE OF A PURCHASER  SHARE" means the  volume-weighted
average  sales price per  Purchaser  Share as reported by Bloomberg  Information
Systems,  Inc. during a period  consisting of the third Nasdaq trading day prior
to the date as of which the Weighted Average Sales Price of a Purchaser Share is
being  determined and the nineteen (19)  consecutive  trading days prior to such
day (the "VALUATION PERIOD").

                        (vi)  CONVERSION  OF  STOCK  RIGHTS.  At  the  Effective
Time,  each Stock Right granted by the Target to purchase Target Shares which is
outstanding and unexercised  immediately prior thereto (whether or not vested or
exercisable),  other than the Purchase Warrant, shall be converted automatically
into an option to  purchase  Purchaser  Shares in an amount  and at an  exercise
price determined as follows:

      (x) The number of  Purchaser  Shares to be subject to the new option shall
      be equal to the  product  of the  number of Target  Shares  subject to the
      original Stock Right  multiplied by the Exchange Ratio,  provided that any
      fractional  Purchaser Shares resulting from such  multiplication  shall be
      rounded up to the next whole share; and

      (y) The exercise  price per Purchaser  Share under the new option shall be
      equal to the  quotient of the  exercise  price per Target  Share under the
      original  Stock Right  divided by the Exchange  Ratio,  provided  that the
      exercise  price  resulting  from such division  shall be rounded up to the
      next whole cent.

The adjustment  provided  herein with respect to any original Stock Rights which
are  "incentive  stock options" (as defined in Section 422 of the Code) shall be
and are  intended to be effected in a manner  which is  consistent  with Section
424(a) of the Code. The option plan of the Target under which the original Stock
Rights were issued shall be assumed by the Purchaser, and the duration and other
terms of the new option  shall be the same as the original  Stock Right,  except
that all  references  to the  Target  shall be  deemed to be  references  to the


                                    - 8 -

<PAGE>



Purchaser.  At the Effective  Time,  the  Purchaser  shall deliver to holders of
original Stock Rights  appropriate  option agreements  representing the right to
acquire  Purchaser  Shares on the terms and conditions set forth in this Section
2(d)(vi).

            The Purchaser shall take all corporate  action  necessary to reserve
for issuance a sufficient  number of Purchaser Shares for delivery upon exercise
of the new options in accordance with this Section 2(d)(vi). The Purchaser shall
file a  registration  statement on Form S-8 (or any  successor  form) or another
appropriate form,  effective  promptly after the Effective Time, with respect to
Purchaser Shares subject to the new options and shall use all reasonable efforts
to maintain the  effectiveness  of such  registration  statement or registration
statements  (and maintain the current status of the  prospectus or  prospectuses
contained therein) for so long as such options remain outstanding.  With respect
to those  individuals  who  subsequent  to the  Merger  will be  subject  to the
reporting  requirements under Section 16(a) of the Securities  Exchange Act, the
Purchaser  shall  administer  the option plans assumed  pursuant to this Section
2(d)(vi)  in a manner  that  complies  with  Rule  16b-3  promulgated  under the
Securities  Exchange Act to the extent the Target option plan complied with such
rule prior to the Merger.

                        (vii)  CONVERSION  OF  CAPITAL  STOCK  OF  THE PURCHASER
SUBSIDIARY.  At and as of the Effective Time,  each share of common stock,  $.01
par value per share,  of the Purchaser  Subsidiary  shall be converted  into one
share of common stock, $.01 par value per share, of the Surviving Corporation.

                  (e)   PROCEDURE FOR EXCHANGE.

                        (i)   Immediately  after  the  Effective  Time,  (A) the
Purchaser will furnish to StockTrans,  Inc., its transfer agent, or such bank or
trust company  reasonably  acceptable to Target,  to act as exchange  agent (the
"EXCHANGE  AGENT") a corpus (the "EXCHANGE FUND") consisting of Purchaser Shares
and cash sufficient to permit the Exchange Agent to make full payment of the Per
Share Merger  Consideration  to the holders of all of the issued and outstanding
Target Shares  (other than any  Purchaser-owned  Shares),  and (B) the Purchaser
will cause the Exchange Agent to mail a letter of transmittal (with instructions
for its  use) in the  form to be  mutually  agreed  upon by the  Target  and the
Purchaser to each holder of issued and outstanding Target Shares (other than any
Purchaser-owned  Shares) for the holder to use in surrendering  the certificates
which  represented  his or its Target  Shares  against  payment of the Per Share
Merger Consideration. Upon surrender to the Exchange Agent of such certificates,
together  with such  letter of  transmittal,  duly  executed  and  completed  in
accordance  with the  instructions  thereto,  the  Surviving  Corporation  shall
promptly  cause to be issued a  certificate  representing  that  number of whole
Purchaser  Shares  and a check  representing  the  amount of cash in lieu of any
fractional shares and unpaid dividends and distributions,  if any, to which such
Persons are entitled,  after giving effect to any required tax withholdings.  No
interest  will be paid or accrued on the cash in lieu of  fractional  shares and
unpaid dividends and  distributions,  if any, payable to recipients of Purchaser
shares. If payment is to be made to a Person other than the registered holder of
the  certificate  surrendered,  it shall be a condition of such payment that the
certificate  so  surrendered  shall be properly  endorsed or otherwise in proper
form for transfer  and that the Person  requesting  such  payment  shall pay any
transfer or other taxes required by reason of the payment to a Person other than


                                    - 9 -

<PAGE>



the  registered  holder  of the  certificate  surrendered  or  establish  to the
satisfaction  of the Surviving  Corporation  or the Exchange Agent that such tax
has been paid or is not applicable.  In the event any  certificate  representing
Shares  shall  have  been  lost,  stolen  or  destroyed,  upon the  making of an
affidavit  of that fact by the  Person  claiming  such  certificate  to be lost,
stolen or  destroyed,  the Exchange  Agent will issue in exchange for such lost,
stolen or destroyed  certificate the Per Share Merger Consideration  deliverable
in respect thereof;  PROVIDED,  HOWEVER, the Person to whom the Per Share Merger
Consideration  is paid shall, as a condition  precedent to the payment  thereof,
give the Surviving  Corporation a bond in such sum as it may direct or otherwise
indemnify the Surviving  Corporation in a manner  satisfactory to it against any
claim that may be made  against the  Surviving  Corporation  with respect to the
certificate  alleged to have been lost,  stolen or  destroyed.  No  dividends or
other distributions  declared after the Effective Time with respect to Purchaser
Shares and payable to the holders of record  thereof shall be paid to the holder
of any  unsurrendered  certificate until the holder thereof shall surrender such
certificate  in  accordance  with this Section  2(e).  After the  surrender of a
certificate  in  accordance  with this Section 2(e),  the record holder  thereof
shall be entitled to receive any such dividends or other distributions,  without
any interest  thereon,  which theretofore had become payable with respect to the
Purchaser Shares represented by such certificate.  No holder of an unsurrendered
certificate shall be entitled, until the surrender of such certificate,  to vote
the Purchaser Shares into which his Target Shares shall have been converted.

                        (ii)  The  Target  will  cause  its  transfer  agent  to
furnish promptly to the Purchaser Subsidiary a list, as of a recent date, of the
record holders of Target Shares and their  addresses,  as well as mailing labels
containing  the names and  addresses of all record  holders of Target Shares and
lists of security  positions of Target  Shares held in stock  depositories.  The
Target will furnish the Purchaser  Subsidiary with such  additional  information
(including,  but not limited to,  updated  lists of holders of Target Shares and
their addresses,  mailing labels and lists of security positions) and such other
assistance  as the  Purchaser or the  Purchaser  Subsidiary  or their agents may
reasonably request.

                        (iii) The Purchaser may  cause  the  Exchange  Agent  to
invest  the  cash  included  in the  Exchange  Fund in one or  more  investments
selected by the Purchaser;  PROVIDED,  HOWEVER, that the terms and conditions of
the  investments  shall be such as to permit the  Exchange  Agent to make prompt
payment of the Per Share Merger  Consideration  as necessary.  The Purchaser may
cause  the  Exchange  Agent to pay  over to the  Surviving  Corporation  any net
earnings  with  respect  to the  investments,  and the  Purchaser  will  replace
promptly any portion of the Exchange Fund which the Exchange Agent loses through
investments.

                        (iv)  The  Purchaser may cause the Exchange Agent to pay
over to the Surviving  Corporation  any portion of the Exchange Fund  (including
any  earnings  thereon)  remaining  180  days  after  the  Effective  Time,  and
thereafter  all former  stockholders  of the Target shall be entitled to look to
the  Surviving  Corporation  (subject to abandoned  property,  escheat and other
similar laws) as general creditors thereof with respect to the cash payable upon
surrender of their certificates.


                                    - 10 -

<PAGE>



                        (v)   The  Purchaser  shall  pay,  or  shall  cause  the
Surviving Corporation to pay, all charges and expenses of the Exchange Agent.

                  (f) CLOSING OF TRANSFER RECORDS.  After the Effective Time, no
transfer of Target Shares  outstanding prior to the Effective Time shall be made
on the  stock  transfer  books  of the  Surviving  Corporation.  If,  after  the
Effective Time, certificates representing such shares are presented for transfer
to the Exchange  Agent,  they shall be canceled and exchanged  for  certificates
representing  Purchaser Shares and cash in lieu of fractional shares, if any, as
provided in Section 2(e).

            3.   REPRESENTATIONS  AND  WARRANTIES  OF  THE  TARGET.  The  Target
represents and warrants to the Purchaser and the Purchaser  Subsidiary  that the
statements contained in this Section 3 are true and correct as of  the  date  of
this Agreement.

                  (a)  ORGANIZATION,  QUALIFICATION AND CORPORATE POWER. Each of
the  Target  and its  Subsidiaries  is a  corporation  duly  organized,  validly
existing  and in  good  standing  under  the  laws  of the  jurisdiction  of its
incorporation.  Each of the Target and its  Subsidiaries  is duly  authorized to
conduct  business and is in good  standing  under the laws of each  jurisdiction
where  such   qualification   is  required,   except  where  the  lack  of  such
qualification  would  not  have a  material  adverse  effect  on  the  business,
financial  condition or results of operations of the Target and its Subsidiaries
taken as a whole or on the ability of the Parties to consummate the transactions
contemplated by this Agreement. Each of the Target and its Subsidiaries has full
corporate power and corporate authority,  and all material foreign,  federal and
state governmental permits, licenses and consents, to carry on the businesses in
which it is engaged and to own and use the properties  owned and used by it. The
Target does not own any equity interest in any corporation or other entity other
than  the  Subsidiaries  listed  in  Section 3(a)  of  the   Target   Disclosure
Letter accompanying this Agreement (the "TARGET DISCLOSURE LETTER").

                  (b) CAPITALIZATION. The entire authorized capital stock of the
Target  consists of  1,000,000  shares of  preferred  stock,  $.01 par value per
share,  none of which are issued and outstanding,  and 50,000,000 Target Shares,
of which 12,130,571  Target Shares were issued and outstanding as of January 26,
1998  and no  Target  Shares  were  held  in  treasury.  All of the  issued  and
outstanding  Target  Shares have been duly  authorized  and are validly  issued,
fully paid and  nonassessable,  and none have been  issued in  violation  of any
preemptive or similar right.  Except as set forth in  Section 3(b) of the Target
Disclosure  Letter,  neither  the  Target  nor any of its  Subsidiaries  has any
outstanding or authorized  Stock Rights.  There are no outstanding or authorized
stock appreciation,  phantom stock, profit  participation or similar rights with
respect to the Target or any of its Subsidiaries.  The Target owns,  directly or
indirectly,  100% of the  outstanding  shares  of  capital  stock of each of its
Subsidiaries  and each such share of capital stock has been duly  authorized and
is validly  issued,  fully paid and  nonassessable,  and none of such  shares of
capital stock has been issued in violation of any preemptive or similar right.

                  (c)  AUTHORIZATION  OF TRANSACTION.  The Target has full power
and authority  (including full corporate power and corporate  authority) and has
taken all  required  action  necessary  to properly  execute  and  deliver  this


                                    - 11 -

<PAGE>



Agreement  and  to  perform  its  obligations  hereunder,   and  this  Agreement
constitutes the valid and legally binding obligation of the Target,  enforceable
in accordance with its terms and conditions, except as limited by (i) applicable
bankruptcy,  insolvency,  reorganization,  moratorium  and other laws of general
application  affecting  enforcement  of  creditors'  rights  generally  and (ii)
general principles of equity,  regardless of whether asserted in a proceeding in
equity or at law;  PROVIDED,  HOWEVER,  that the Target  cannot  consummate  the
Merger unless and until it receives the Requisite Stockholder Approval.

                  (d)  NONCONTRAVENTION.  Neither the execution and the delivery
of this Agreement, nor the consummation of the transactions contemplated hereby,
will (i)  violate  any  constitution,  statute,  regulation,  rule,  injunction,
judgment,  order,  decree or other  restriction of any government,  governmental
agency or court to which the Target or any of its Subsidiaries is subject or any
provision of the charter or bylaws of the Target or any of its  Subsidiaries  or
(ii) conflict with, result in a breach of, constitute a default under, result in
the  acceleration  of, create in any party the right to  accelerate,  terminate,
modify or cancel or require any notice  under any  agreement,  contract,  lease,
license,  instrument  or other  arrangement  to which  the  Target or any of its
Subsidiaries is a party or by which it is bound or to which any of its assets is
subject, except where the violation,  conflict,  breach, default,  acceleration,
termination,  modification,  cancellation,  or failure to give notice  would not
have a material adverse effect on the business,  financial  condition or results
of  operations  of the  Target and its  Subsidiaries  taken as a whole or on the
ability of the  Parties to  consummate  the  transactions  contemplated  by this
Agreement. Other than in connection with the provisions of the Hart-Scott-Rodino
Act, the Florida  Business  Corporation  Law, the  Securities  Exchange Act, the
Securities  Act,  state  securities  laws,  and  with  regard  to  any  required
governmental   or   regulatory   approvals   or   consents   relating   to   the
telecommunications  industry,  the  laws,  rules or  regulations  of the  United
States,  the several  states or the District of Columbia,  the  Commonwealth  of
Puerto Rico, the United States Virgin Islands and of any other  jurisdiction  in
which such approvals or consents may be required, and any other statutes,  rules
or  regulations  set forth in  Section  3(d) of the  Target  Disclosure  Letter,
neither the Target nor any of its Subsidiaries needs to give any notice to, make
any  filing  with or  obtain  any  authorization,  consent  or  approval  of any
government or  governmental  agency in order for the Parties to  consummate  the
transactions  contemplated by this  Agreement,  except where the failure to give
notice,  to file or to obtain any  authorization,  consent or approval would not
have a material adverse effect on the business,  financial  condition or results
of  operations  of the  Target and its  Subsidiaries  taken as a whole or on the
ability of the  Parties to  consummate  the  transactions  contemplated  by this
Agreement.

                  (e)  FILINGS  WITH  THE SEC.  Except  as  set forth in Section
3(e) of the Target Disclosure  Letter,  the Target has made all filings with the
SEC  that  it has  been  required  to  make  under  the  Securities  Act and the
Securities Exchange Act (collectively, the "TARGET REPORTS"). Each of the Target
Reports has complied with the Securities Act and the Securities  Exchange Act in
all material respects. None of the Target Reports, as of their respective dates,
contained any untrue statement of a material fact or omitted to state a material
fact  necessary in order to make the  statements  made therein,  in light of the
circumstances under which they were made, not misleading.


                                    - 12 -

<PAGE>



                  (f)  FINANCIAL  STATEMENTS.  The  Target  has  filed an Annual
Report on Form 10-K (the "TARGET  10-K") for the fiscal year ended  December 31,
1996 (the "TARGET'S MOST RECENT AUDITED FISCAL YEAR END") and a Quarterly Report
on Form 10-Q (the "TARGET 10- Q") for the fiscal  quarter  ended  September  30,
1997. The financial  statements  included in the Target 10-K and the Target 10-Q
(including  the related notes and  schedules)  have been prepared from the books
and records of the Target and its  Subsidiaries  in accordance with GAAP applied
on a consistent basis throughout the periods covered thereby, and present fairly
in all  material  respects  the  financial  condition  of  the  Target  and  its
Subsidiaries  as of the indicated  dates and the results of operations  and cash
flows of the Target and its Subsidiaries for the indicated periods,  except that
unaudited interim results are subject to year-end adjustments.

                  (g) EVENTS  SUBSEQUENT  TO TARGET'S  MOST RECENT  FISCAL YEAR.
Since the Target's Most Recent Audited  Fiscal Year End,  except as disclosed in
the  Target  Reports  and  except as set  forth in  Section  3(g) of the  Target
Disclosure  Letter,  (i) the Target and its  Subsidiaries  have conducted  their
respective  businesses  only in, and have not engaged in any  transaction  other
than  according to, the ordinary and usual course of such  businesses,  and (ii)
there has not been A) any change in the financial condition, business or results
of operations of the Target or any of its  Subsidiaries,  or any  development or
combination of developments relating to the Target or any of its Subsidiaries of
which  management  of the Target has  knowledge,  and which could  reasonably be
expected to have a material adverse effect upon the usiness, financial condition
or results of  operations of the Target and its  Subsidiaries  taken as a whole;
(B)  any  declaration,  setting  aside  or  payment  of any  dividend  or  other
distribution with respect to the capital stock of the Target, or any redemption,
repurchase or other reacquisition of any of the capital stock of the Target; (C)
any change by the Target in accounting principles, practices or methods; (D) any
increase in the  compensation  of any officer or grant of any general  salary or
benefits  increase  to their  employees  other  than in the  ordinary  course of
business consistent with past practices; (E) any issuance or sale of any capital
stock or other  securities  (including any Stock Rights) by the Target or any of
its Subsidiaries of any kind, other than upon exercise of Stock Rights issued by
or binding  upon the  Target;  (F) any  modification,  mendment or change to the
terms  or   conditions   of  any  Stock  Right;   G)  any  split,   combination,
reclassification,  redemption,  repurchase or other reacquisition of any capital
stock or other securities of the Target or any of its  Subsidiaries;  or (H) the
taking by the Target of, or the entry into any  agreement by the Target to take,
any action  prohibited under clauses (i), and (iv) through (vi), of Section 5(d)
below.

                  (h)  COMPLIANCE.  Except as set forth in Section 3(h)  of  the
Target Disclosure Letter, the Target and its Subsidiaries are in compliance with
all applicable  foreign,  federal,  state and local laws,  rules and regulations
except where the failure to be in  compliance  could  reasonably  be expected to
have a material adverse effect on the business,  financial  condition or results
of operations of the Target and its Subsidiaries taken as a whole.

                  (i) BROKERS' AND OTHER FEES. Except as set  forth  in  Section
3(i) of the Target  Disclosure  Letter,  none of the Target and its Subsidiaries
has any liability or obligation  to pay any fees or  commissions  to any broker,
finder or agent with respect to the transactions contemplated by this Agreement.
Attached to Section 3(i) of the Target  Disclosure  Letter are true and complete
copies of the  Target's  engagement  or similar  letters  with (i) the  brokers,
finders and agents referred to in such section of the Target Disclosure  Letter,



                                    - 13 -

<PAGE>



and (ii) Kelley Drye & Warren LLP as to its legal  services to be  performed  in
connection  with  transactions  involving  a  possible  change in control of the
Company, including this Agreement and the transactions contemplated hereby.

                  (j)  LITIGATION  AND  LIABILITIES.  Except as disclosed in the
Target Reports, or the Target Disclosure Letter, there are (i) no actions, suits
or  proceedings  pending or, to the  knowledge of the  management of the Target,
threatened  against  the  Target  or any of the  Subsidiaries,  or any  facts or
circumstances  known to the  management  of the Target which may give rise to an
action, suit or proceeding against the Target or any of its Subsidiaries,  which
(x) could  reasonably  be  expected to have a material  adverse  effect upon the
business,  financial  condition or results of  operations  of the Target and its
Subsidiaries  taken as a whole or (y) could  reasonably be expected to impair or
delay the Target's ability to consummate the  transactions  contemplated by this
Agreement,  or (ii) no  obligations  or  liabilities of the Target or any of its
Subsidiaries,  whether accrued, contingent or otherwise, known to the management
of the Target  which could  reasonably  be  expected to have a material  adverse
effect upon the  business,  financial  condition or results of operations of the
Target and its Subsidiaries taken as a whole.

                 (k)  TAXES.  Except as set forth in Section 3(k) of the  Target
Disclosure  Letter,  the  Target has duly filed all  federal,  state,  local and
foreign tax returns required to be filed by it, and has duly paid,  caused to be
paid or made adequate provision for the payment of all Taxes required to be paid
in respect of the periods  covered by such returns,  except where the failure to
pay such  Taxes  would not have a material  adverse  effect  upon the  business,
financial  condition or results of operations of the Target and its Subsidiaries
taken as a whole.  Except as set forth in Section 3(k) of the Target  Disclosure
Letter,  no claims  for Taxes  have been  asserted  against  the  Target  and no
material deficiency for any Taxes has been proposed,  asserted or assessed which
has not  been  resolved  or paid  in  full.  To the  knowledge  of the  Target's
management,  no Tax Return or taxable period of the Target is under  examination
by any  taxing  authority,  and Target has not  received  written  notice of any
pending audit by any taxing  authority.  There are no outstanding  agreements or
waivers  extending  the  statutory  period of  limitation  applicable to any Tax
Return for any period of the Target.  To the knowledge of the  management of the
Target,  the  Target  has  no  obligation  or  liability  to  pay  Taxes  of  or
attributable to any other person or entity.  No issue or claim has been asserted
for Taxes by any taxing  authority for any prior period.  Except as set forth in
Section 3(k) of the Target Disclosure Letter,  there are no tax liens other than
liens for Taxes not yet due relating to the Target. The Target is not a party to
any agreement or contract which would result in payment of any "excess parachute
payment"  within the  meaning of  Section  280G of the Code.  The Target has not
filed  any  consent  pursuant  to  Section  341(f) of the Code or agreed to have
Section 341(f)(2) of the Code apply to any disposition of a subsection (f) asset
owned by the Target or any of the  Subsidiaries.  The Target has not been and is
not a United  States  real  property  holding  company  (as  defined  in Section
897(c)(2)  of the Code)  during  the  applicable  period  specified  in  Section
897(c)(1)(A)(ii) of the Code).

                  (l)   FAIRNESS OPINION.  The  Robinson-Humphrey  Company,  LLC
has  delivered  to  the  Target  Board, and  not  withdrawn, the Target Fairness
Opinion,  and  a  true  and  complete  copy  thereof  has  been furnished to the
Purchaser.


                                    - 14 -

<PAGE>


                  (m)   EMPLOYEE BENEFITS.

                        (i)  All pension, profit-sharing, deferred compensation,
savings,  stock bonus and stock option plans,  and all employee  benefit  plans,
whether or not covered by the Employee  Retirement  Income Security Act of 1974,
as amended  ("ERISA")  which are sponsored by the Target or any ERISA  Affiliate
(as defined  below) of the Target or to which the Target or any ERISA  Affiliate
of the Target makes contributions,  and which cover employees of the Target (the
"EMPLOYEES")  or former  employees of the Target,  all  employment  or severance
contracts with officers of the Target, and any applicable "change of control" or
similar  provisions in any plan,  contract or arrangement  that cover  Employees
(collectively, "BENEFIT PLANS" and individually a "BENEFIT PLAN") are accurately
and  completely  listed in Section  3(m) of the  Target  Disclosure  Letter.  No
Benefit Plan is a  multi-employer  plan,  money purchase plan or defined benefit
plan and no  Benefit  Plan is covered  by Title IV of ERISA.  True and  complete
copies of all Benefit Plans (other than medical and other similar  welfare plans
made  generally  available  to all  Employees)  have been made  available to the
Purchaser.

                        (ii)  All  Benefit Plans to the extent subject to ERISA,
are in  compliance  in all  material  respects  with  ERISA  and the  rules  and
regulations  promulgated  thereunder.  Each  Benefit  Plan which is an "employee
pension  benefit  plan"  within the meaning of Section  3(2) of ERISA  ("PENSION
PLAN")  and  which is  intended  to be  qualified  under  Section  401(a) of the
Internal Revenue Code of 1986, as amended (the "CODE"), has received a favorable
determination  letter from the Internal  Revenue  Service,  which  determination
letter is currently in effect,  and there are no proceedings  pending or, to the
best  knowledge of the  management  of the Target,  threatened,  or any facts or
circumstances known to the management of the Target, which are reasonably likely
to result in revocation of any such favorable  determination letter. There is no
pending or, to the best  knowledge of the  management of the Target,  threatened
litigation  relating  to the  Benefit  Plans.  Neither the Target nor any of the
Subsidiaries has engaged in a transaction with respect to any Benefit Plan that,
assuming the taxable period of such  transaction  expired as of the date hereof,
is reasonably  likely to subject the Target or any of the  Subsidiaries to a tax
or penalty  imposed  by either  Section  4975 of the Code or  Section  502(i) of
ERISA.

                        (iii)  No liability under  Title IV of ERISA has been or
is  reasonably  likely to be incurred  by the Target or any of the  Subsidiaries
with  respect  to any  ongoing,  frozen  or  terminated  Benefit  Plan that is a
"single-employer  plan",  within the  meaning of Section  4001(a)(15)  of ERISA,
currently or formerly maintained by any of them, or the single-employer  plan of
any entity which is considered a predecessor  of the Target or one employer with
the Target under Section 001 of ERISA (an "ERISA AFFILIATE"); PROVIDED, HOWEVER,
for purposes hereof, the Stockholder, its Affiliates and its partners, and their
respective  Affiliates,   shall  not  be  considered  an  ERISA  Affiliate.  All
contributions  required to be made under the terms of any Benefit Plan have been
timely  made or reserves  therefor on the balance  sheet of the Target have been
established,  which reserves are adequate. Except as required by Part 6 of Title
I of ERISA, the Target does not have any unfunded obligations for retiree health
and life benefits under any Benefit Plan.


                                    - 15 -

<PAGE>



                  (n) FLORIDA BUSINESS  CORPORATION LAW. For purposes of Section
607.0902 of the Florida Business  Corporation Law, the execution and delivery of
the Stockholder Agreement and the purchase of Target Shares thereunder,  and the
purchase of Target Shares or other securities  issued by the Target by Purchaser
Companies  generally,  has received the prior approval of the Board of Directors
of  the  Target  and,   accordingly,   will  not  constitute  a  "control  share
acquisition"  as  defined  in  Section   607.0902(2)  of  the  Florida  Business
Corporation Law.

            4. REPRESENTATIONS AND WARRANTIES OF THE PURCHASER AND THE PURCHASER
SUBSIDIARY.  Each of the  Purchaser and the  Purchaser  Subsidiary,  jointly and
severally,  represents and warrants to the Target that the statements  contained
in this Section 4 are true and correct as of the date of this Agreement.

                  (a)  ORGANIZATION,  QUALIFICATION AND CORPORATE POWER. Each of
the Purchaser and its  Subsidiaries  is a corporation  duly  organized,  validly
existing  and in  good  standing  under  the  laws  of the  jurisdiction  of its
incorporation.  Each of the Purchaser and its Subsidiaries is duly authorized to
conduct  business and is in good  standing  under the laws of each  jurisdiction
where  such   qualification   is  required,   except  where  the  lack  of  such
qualification  would  not  have a  material  adverse  effect  on  the  business,
financial   condition  or  results  of  operations  of  the  Purchaser  and  its
Subsidiaries taken as a whole or on the ability of the Parties to consummate the
transactions  contemplated  by this  Agreement.  Each of the  Purchaser  and its
Subsidiaries has full corporate power and corporate authority,  and all material
foreign, federal and state governmental permits, licenses and consents, to carry
on the businesses in which it is engaged and to own and use the properties owned
and  used  by it.  The  Purchaser  does  not  own  any  equity  interest  in any
corporation  or  other entity other than the Subsidiaries listed in Section 4(a)
of the Purchaser's  disclosure  letter  accompanying  this  Agreement  (the
"PURCHASER DISCLOSURE LETTER").

                  (b) CAPITALIZATION. The entire authorized capital stock of the
Purchaser  consists of 2,000,000 shares of preferred  stock,  $.01 par value per
share,  none of which are  issued  and  outstanding,  and  40,000,000  Purchaser
Shares,  of which 19,676,057  Purchaser Shares were issued and outstanding as of
January  30, 1998 and no  Purchaser  Shares  were held in  treasury.  All of the
issued  and  outstanding  Purchaser  Shares  have been duly  authorized  and are
validly  issued,  fully  paid and  nonassessable,  and none have been  issued in
violation of any  preemptive  or similar  right.  Except as set forth in Section
4(b) of the Purchaser  Disclosure  Letter,  neither the Purchaser nor any of its
Subsidiaries  has any  outstanding  or  authorized  Stock  Rights.  There are no
outstanding   or  authorized   stock   appreciation,   phantom   stock,   profit
participation  or similar  rights with  respect to the  Purchaser  or any of its
Subsidiaries.  Except as set forth in Section 4(b) of the  Purchaser  Disclosure
Letter,  the  Purchaser,  directly or indirectly,  owns 100% of the  outstanding
shares of  capital  stock of each of its  Subsidiaries  and each  such  share of
capital stock has been duly  authorized  and is validly  issued,  fully paid and
nonassessable,  and none of such  shares of  capital  stock  has been  issued in
violation of any preemptive or similar right.

                  (c)  AUTHORIZATION  OF TRANSACTION.  Each of the Purchaser and
the Purchaser  Subsidiary has full power and authority (including full corporate
power and corporate authority),  and has taken all required action necessary, to


                                    - 16 -

<PAGE>



properly  execute  and deliver  this  Agreement  and to perform its  obligations
hereunder,  and  this  Agreement  constitutes  the  valid  and  legally  binding
obligation of each of the Purchaser and the Purchaser Subsidiary, enforceable in
accordance  with its terms and  conditions,  except as limited by (i) applicable
bankruptcy,  insolvency,  reorganization,  moratorium  and other laws of general
application  affecting  enforcement  of  creditors'  rights  generally  and (ii)
general principles of equity,  regardless of whether asserted in a proceeding in
equity or at law;  PROVIDED,  HOWEVER,  that the Purchaser cannot consummate the
Merger unless and until it receives the Requisite Stockholder Approval.

                   (d)  NONCONTRAVENTION. Neither the execution and the delivery
of this Agreement, nor the consummation of the transactions contemplated hereby,
will (i)  violate  any  constitution,  statute,  regulation,  rule,  injunction,
judgment,  order,  decree or other  restriction of any government,  governmental
agency or court to which either the Purchaser or its  Subsidiaries is subject or
any  provision  of  the  charter  or  bylaws  of  either  the  Purchaser  or its
Subsidiaries or (ii) conflict with,  result in a breach of, constitute a default
under,  result  in the  acceleration  of,  create  in any  party  the  right  to
accelerate,  terminate,  modify  or  cancel  or  require  any  notice  under any
agreement,  contract,  lease, license,  instrument or other arrangement to which
either the Purchaser or its  Subsidiaries  is a party or by which it is bound or
to which any of its assets is  subject,  except in the case of clause (ii) where
the   violation,   conflict,   breach,   default,   acceleration,   termination,
modification,  cancellation  or failure to give notice would not have a material
adverse effect on the business,  financial condition or results of operations of
the  Purchaser  and its  Subsidiaries  taken as a whole or on the ability of the
Parties to consummate the  transactions  contemplated by this  Agreement.  Other
than in connection with the provisions of the Hart-Scott-Rodino Act, Nasdaq, the
Securities  Exchange Act, the Securities  Act, state  securities  laws, and with
regard to any required governmental or regulatory approvals or consents relating
to the telecommunications industry, the laws, rules or regulations of the United
States,  the several  states or the District of Columbia,  the  Commonwealth  of
Puerto Rico, the United States Virgin Islands and of any other  jurisdiction  in
which such approvals or consents may be required, and any other statutes,  rules
or  regulations  set forth in Section 4(d) of the Purchaser  Disclosure  Letter,
neither the Purchaser nor its Subsidiaries needs to give any notice to, make any
filing with or obtain any  authorization,  consent or approval of any government
or governmental  agency in order for the Parties to consummate the  transactions
contemplated by this Agreement, except where the failure to give notice, to file
or to obtain any  authorization,  consent or approval  would not have a material
adverse  effect on the ability of the  Parties to  consummate  the  transactions
contemplated by this Agreement.

                  (e) FILINGS WITH THE SEC. The  Purchaser  has made all filings
with the SEC that it has been required to make under the  Securities Act and the
Securities  Exchange Act (collectively,  the "PURCHASER  REPORTS").  Each of the
Purchaser  Reports  has  complied  with the  Securities  Act and the  Securities
Exchange Act in all material  respects.  None of the  Purchaser  Reports,  as of
their  respective  dates,  contained any untrue  statement of a material fact or
omitted to state a material fact necessary in order to make the statements  made
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading.

                  (f)  FINANCIAL  STATEMENTS.  The Purchaser has filed an Annual
Report on Form 10-K (the  "PURCHASER  10-K") for the fiscal year ended  December
31, 1996 (the "PURCHASER'S MOST RECENT AUDITED FISCAL YEAR END") and a Quarterly


                                    - 17 -

<PAGE>


Report  on Form  10-Q  (the  "PURCHASER  10-Q")  for the  fiscal  quarter  ended
September 30, 1997. The financial  statements included in the Purchaser 10-K and
the  Purchaser  10-Q  (including  the  related  notes and  schedules)  have been
prepared  from the books and records of the Purchaser  and its  Subsidiaries  in
accordance  with GAAP  applied on a  consistent  basis  throughout  the  periods
covered  thereby,  and present  fairly in all material  respects  the  financial
condition of the Purchaser and its  Subsidiaries  as of the indicated  dates and
the results of operations  and cash flows of the Purchaser and its  Subsidiaries
for the indicated periods,  except that unaudited interim results are subject to
year-end adjustments.

                  (g) EVENTS  SUBSEQUENT  TO  PURCHASER'S  MOST  RECENT  AUDITED
FISCAL  YEAR.  Since the Most  Recent  Fiscal  Year End,  there has not been any
change in the  financial  condition,  business or results of  operations  of the
Purchaser or any of its  Subsidiaries,  or any  development  or  combination  of
developments  relating  to the  Purchaser  or any of its  Subsidiaries  of which
management  of the  Purchaser  has  knowledge,  and which  could  reasonably  be
expected  to  have a  material  adverse  effect  upon  the  business,  financial
condition or results of operations of the Purchaser and its  Subsidiaries  taken
as a whole.

                  (h)  BROKERS'  FEES.  Except  as set forth in  Section 4(h) of
the Purchaser  Disclosure Letter,  none of the Purchaser or its Subsidiaries has
any liability or obligation to pay any fees or commissions to any broker, finder
or agent with respect to the transactions contemplated by this Agreement.

                  (i)  LITIGATION  AND  LIABILITIES.  Except as disclosed in the
Purchaser  Reports or the  Purchaser  Disclosure  Letter,  there are no actions,
suits or  proceedings  pending or, to the  knowledge  of the  management  of the
Purchaser,  threatened against the Purchaser or any of the Subsidiaries,  or any
facts or  circumstances  known to the management of the Purchaser which may give
rise to an  action,  suit or  proceeding  against  the  Purchaser  or any of its
Subsidiaries,  which (x) could reasonably be expected to have a material adverse
effect upon the  business,  financial  condition or results of operations of the
Purchaser  and its  Subsidiaries  taken as a whole or (y)  could  reasonably  be
expected  to  impair  or  delay  the  Purchaser's   ability  to  consummate  the
transactions contemplated by this Agreement.

                  (j)   FAIRNESS  OPINION.   BT  Alex.  Brown  Incorporated  has
delivered to the Purchaser  Board,  and not  withdrawn,  the Purchaser  Fairness
Opinion, and a true and complete copy thereof has been furnished to the Target.

                  (k) TAXES.  The Purchaser  has duly filed all federal,  state,
local and  foreign  tax  returns  required to be filed by it, and has duly paid,
caused  to be paid or made  adequate  provision  for the  payment  of all  Taxes
required to be paid in respect of the periods  covered by such  returns,  except
where the  failure to pay such Taxes  would not have a material  adverse  effect
upon the business, financial condition or results of operations of the Purchaser
and its  Subsidiaries  taken as a whole.  Except as set forth in Section 4(k) of
the Purchaser  Disclosure Letter, no claims for Taxes have been asserted against
the  Purchaser  and no  material  deficiency  for any Taxes  has been  proposed,
asserted  or  assessed  which  has not been  resolved  or paid in  full.  To the
knowledge of the Purchaser's management,  no Tax Return or taxable period of the
Purchaser is under  examination by any taxing  authority,  and Purchaser has not


                                    - 18 -

<PAGE>



received written notice of any pending audit by any taxing authority.  There are
no  outstanding   agreements  or  waivers  extending  the  statutory  period  of
limitation  applicable  to any Tax Return for any period of the  Target.  To the
knowledge of the management of the Purchaser, the Purchaser has no obligation or
liability  to pay Taxes of or  attributable  to any other  person or entity.  No
issue or claim has been asserted for Taxes by any taxing authority for any prior
period.  Except as set forth in Section 4(k) of the Purchaser Disclosure Letter,
there are no tax liens  other than liens for Taxes not yet due  relating  to the
Purchaser. The Purchaser is not a party to any agreement or contract which would
result in payment  of any  "excess  parachute  payment"  within  the  meaning of
Section 280G of the Code.  The Purchaser  has not filed any consent  pursuant to
Section 341(f) of the Code or agreed to have Section 341(f)(2) of the Code apply
to any  disposition  of a subsection  (f) asset owned by the Purchaser or any of
the  Subsidiaries.  The  Purchaser  has not been and is not a United States real
property  holding  company (as defined in Section  897(c)(2) of the Code) during
the applicable period specified in Section 897(c)(1)(A)(ii) of the Code).

                  (l)  COMPLIANCE.  The  Purchaser and its  Subsidiaries  are in
compliance with all applicable foreign, federal, state and local laws, rules and
regulations  except where the failure to be in  compliance  could  reasonably be
expected to have a material adverse effect on the business,  financial condition
or results of operations of the Purchaser and its Subsidiaries taken as a whole.

                  (m)   OWNERSHIP  OF  THE   PURCHASER   SUBSIDIARY;   NO  PRIOR
ACTIVITIES. The Purchaser Subsidiary is a direct, wholly-owned Subsidiary of the
Purchaser and was formed solely for the purpose of engaging in the  transactions
contemplated by this Agreement.  Except for obligations or liabilities  incurred
in  connection  with its  incorporation  or  organization  and the  transactions
contemplated  by this  Agreement  and  except for this  Agreement  and any other
agreements  or  arrangements  contemplated  by  this  Agreement,  the  Purchaser
Subsidiary has not and will not have incurred,  directly or indirectly,  through
any  Subsidiary or Affiliate,  any  obligations or liabilities or engaged in any
business  activities  of any  type  or  kind  whatsoever  or  entered  into  any
agreements  or  arrangements  with any Person which could  adversely  effect the
ability of the Purchaser to consummate the transactions contemplated hereby.

            5.  COVENANTS.  The  Parties  agree as follows  with  respect to the
period from and after the execution of this Agreement  through and including the
Closing Date  (except for Section 5(h) and  Section 5(i),  which will apply from
and after the Effective Time in accordance with their respective terms).

                  (a)  GENERAL.  Each of the  Parties  will  use all  reasonable
efforts  to  take  all  actions  and to do all  things  necessary  in  order  to
consummate and make effective the  transactions  contemplated  by this Agreement
(including satisfaction,  but not waiver, of the closing conditions set forth in
Section 6 below).

                  (b) NOTICES AND CONSENTS.  The Target and the  Purchaser  will
give any notices (and will cause each of their  respective  Subsidiaries to give
any notices) to third  parties,  and will use all  reasonable  efforts to obtain
(and will  cause each of their  respective  Subsidiaries  to use all  reasonable
efforts to obtain) any third-party consents,  that may be required in connection
with the matters referred to in Section 3(d) and Section 4(d) above.

                                    - 19 -

<PAGE>




                  (c)  REGULATORY  MATTERS AND  APPROVALS.  Each of the Parties,
promptly  after the date hereof,  will (and the Target,  promptly after the date
hereof,  will cause each of its  Subsidiaries  to) give any notices to, make any
filings  with and use all  reasonable  efforts  to  obtain  any  authorizations,
consents and approvals of governments  and  governmental  agencies in connection
with the matters  referred to in Section 3(d) and Section 4(d) above.  Purchaser
shall be responsible for preparing and filing the appropriate  applications  and
documentation  which are necessary or appropriate to request the authorizations,
consents and approvals from governmental  authorities with jurisdiction over the
telecommunications  industry  to the  Merger and the  transactions  contemplated
hereby and,  the Target at its sole cost and  expense  will  cooperate  with the
Purchaser in that regard,  providing  such  assistance  as the  Purchaser  shall
reasonably  request.  The  Purchaser  will provide the Target with drafts of all
applications and other documents to be filed with any such regulatory  authority
prior to such  filing  and shall  give the Target a  reasonable  opportunity  to
review and comment thereon. Without limiting the generality of the foregoing:

                        (i)   FEDERAL   SECURITIES   LAWS.    As   promptly   as
practicable   following  the  date  hereof,  the  Purchaser  and  the  Purchaser
Subsidiary shall, in cooperation with the Target,  prepare and file with the SEC
preliminary   proxy   materials   which   shall   constitute   the  Joint  Proxy
Statement/Prospectus  (such proxy  statement/prospectus,  and any  amendments or
supplements thereto, the "JOINT PROXY  STATEMENT/PROSPECTUS") and a registration
statement on Form S-4 with  respect to the  issuance of Purchaser  Shares in the
Merger  (the   "REGISTRATION   STATEMENT"),   and  file  with  state  securities
administrators  such  registration  statements  or  other  documents  as  may be
required  under  applicable  blue sky laws to qualify or register such Purchaser
Shares in such states as are  designated by the Target (the "BLUE SKY FILINGS").
The  Joint  Proxy  Statement/Prospectus  will be  included  in the  Registration
Statement as the  Purchaser's  prospectus.  The  Registration  Statement and the
Joint  Proxy  Statement/Prospectus  shall  comply  as to  form  in all  material
respects with the  applicable  provisions of the Securities Act and the Exchange
Act and the rules and  regulations  thereunder.  Each of the  Purchaser  and the
Purchaser  Subsidiary shall use all reasonable  efforts to have the Registration
Statement  declared effective by the SEC as promptly as practicable after filing
with  the SEC and to keep the  Registration  Statement  effective  as long as is
necessary to consummate the Merger.  The Purchaser and the Purchaser  Subsidiary
agree that none of the  information  supplied or to be supplied by the Purchaser
or the Purchaser  Subsidiary for inclusion or  incorporation by reference in the
Joint Proxy  Statement/Prospectus  and each amendment or supplement  thereto, at
the time of mailing thereof and at the time of the Target Special Meeting or the
Purchaser  Special Meeting,  will contain an untrue statement of a material fact
or omit to state a material fact  required to be stated  therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The Target agrees that none of the information supplied or
to be supplied by the Target for inclusion or  incorporation by reference in the
Joint Proxy  Statement/Prospectus  and each amendment or supplement  thereto, at
the time of mailing thereof and at the time of the Target Special Meeting or the
Purchaser  Special Meeting,  will contain an untrue statement of a material fact
or omit to state a material fact  required to be stated  therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. For purposes of the foregoing, it is understood and agreed
that  information  concerning  or related  to the  Purchaser  and the  Purchaser


                                    - 20 -

<PAGE>


Special  Meeting  will be deemed  to have been  supplied  by the  Purchaser  and
information  concerning or related to the Target and the Target Special  Meeting
shall be deemed to have been supplied by the Target.  The Purchaser will provide
the Target with a reasonable  opportunity to review and comment on any amendment
or supplement to the Joint Proxy  Statement/Prospectus prior to filing such with
the SEC,  will  provide the Target with a copy of all such filings made with the
SEC and will notify the Target as promptly as  practicable  after the receipt of
any  comments  from  the  SEC  or  its  staff  or  from  any  state   securities
administrators  and of any  request  by the  SEC or its  staff  or by any  state
securities  administrators  for amendments or  supplements  to the  Registration
Statement  or any Blue  Sky  Filings  or for  additional  information,  and upon
request of the Target,  will supply the Target and its legal counsel with copies
of all correspondence  between the Purchaser or any of its  representatives,  on
the one hand, and the SEC, its staff or any state securities administrators,  on
the other hand,  with  respect to the  Registration  Statement.  No amendment or
supplement to the information  supplied by the Target for inclusion in the Joint
Proxy  Statement/Prospectus  shall be made  without the  approval of the Target,
which approval shall not be  unreasonably  withheld or delayed.  If, at any time
prior to the Effective  Time,  any event relating to the Target or the Purchaser
or any of their  respective  Affiliates,  officers or directors is discovered by
the  Target  or the  Purchaser,  as the case  may be,  that is  required  by the
Securities Act, the Exchange Act, or the rules or regulations thereunder,  to be
set forth in an amendment to the  Registration  Statement or a supplement to the
Joint Proxy  Statement/Prospectus,  the Target or the Purchaser, as the case may
be, will as promptly as  practicable  inform the other,  and such  amendment  or
supplement  will  be  promptly  filed  with  the  SEC  and  disseminated  to the
stockholders  of the  Target  and  the  Purchaser,  to the  extent  required  by
applicable  securities  laws.  All  documents  which the Target of the Purchaser
files or is responsible for filing with the SEC and any other regulatory  agency
in connection with the Merger (including,  without limitation,  the Registration
Statement and the Joint Proxy  Statement/Prospectus)  will comply as to form and
content  in all  material  respects  with  the  provisions  of  applicable  law.
Notwithstanding  the foregoing,  the Target,  on the one hand, and the Purchaser
and the Purchaser  Subsidiary,  on the other hand,  make no  representations  or
warranties with respect to any information  that has been supplied in writing by
the other, or the other's auditors, attorneys, financial advisors,  specifically
for use in the Registration  Statement or the Joint Proxy  Statement/Prospectus,
or in any  other  documents  to be filed  with the SEC or any  other  regulatory
agency  expressly  for use in  connection  with  the  transactions  contemplated
hereby.

                        (ii)  FLORIDA  BUSINESS  CORPORATION  LAW  AND  DELAWARE
GENERAL  CORPORATION  LAW.  The  Target  will  take all  action,  to the  extent
necessary in accordance with applicable law, its articles of  incorporation  and
bylaws to convene a special  meeting of its  stockholders  (the "TARGET  SPECIAL
MEETING"),  as soon as reasonably practicable in order that the stockholders may
consider  and vote upon the adoption of this  Agreement  and the approval of the
Merger in accordance with the Florida  Business  Corporation  Law. The Purchaser
will take all action, to the extent necessary in accordance with applicable law,
its certificate of incorporation  and bylaws to convene a special meeting of its
stockholders  (the  "PURCHASER   SPECIAL   MEETING"),   as  soon  as  reasonably
practicable  in order  that the  stockholders  may  consider  and vote  upon the
adoption of this  Agreement  and the  approval of the Merger in order to satisfy
the  requirements  of the Nasdaq  Stock  Market  ("NASDAQ").  The Target and the
Purchaser shall mail the Joint Proxy  Statement/Prospectus  to their  respective
stockholders  simultaneously  and as soon as reasonably  practicable.  The Joint


                                    - 21 -

<PAGE>



Proxy    Statement/Prospectus    shall   contain   the   affirmative   unanimous
recommendations  of  the  respective  boards  of  directors  of the  Target  and
Purchaser  in favor of the  adoption of this  Agreement  and the approval of the
Merger;  PROVIDED,  HOWEVER,  that no  director  of  either  the  Target  or the
Purchaser  shall be  required  to take any action if it is advised in writing by
Kelley Drye & Warren LLP, in the case of the Target Board, or by Pepper Hamilton
LLP, in the case of the  Purchaser  Board,  that such action  would  violate its
fiduciary duty to stockholders.

                        (iii)  HART-SCOTT-RODINO ACT.  As soon as possible after
the date  hereof,  each of the Parties will file (and the Target will cause each
of its  Subsidiaries  to file) any  Notification  and Report  Forms and  related
material that it may be required to file with the Federal Trade  Commission  and
the  Antitrust  Division of the United  States  Department  of Justice under the
Hart-Scott-Rodino Act, will use all reasonable efforts to obtain (and the Target
will cause each of its Subsidiaries to use all reasonable  efforts to obtain) an
early  termination  of the  applicable  waiting  period,  and will make (and the
Target will cause each of its Subsidiaries to make) any further filings pursuant
thereto that may be necessary.

                        (iv)  PERIODIC REPORTS.  Unless an  exemption  shall  be
expressly  applicable to the Target, or unless the Purchaser agrees otherwise in
writing, the Target will file with the SEC and Nasdaq all reports required to be
filed by it pursuant to the rules and  regulations  of the SEC. Such reports and
other  information  shall  comply  in  all  material  respects  with  all of the
requirements of the SEC rules and regulations and, when filed,  will not include
an untrue statement of a material fact or omit to state a material fact required
to be stated  therein or necessary to make the statements  therein,  in light of
the circumstances under which they were made, not misleading.  The Purchaser and
the Purchaser  Subsidiary,  and their counsel,  shall be given an opportunity to
review such  filings  prior to their  being  filed with the SEC and Nasdaq,  and
shall be provided with final copies thereof  concurrently with their filing with
the SEC.

                  (d)  OPERATION OF BUSINESS.  The Target will not (and will not
cause or permit any of its Subsidiaries  to), without the written consent of the
Purchaser,  take any  action or enter  into any  transaction  other  than in the
ordinary course of business.  Without  limiting the generality of the foregoing,
except as  expressly  provided in this  Agreement  or Section 5(d) of the Target
Disclosure Letter, without the written consent of the Purchaser:

                        (i)   none  of  the  Target  and  its  Subsidiaries will
authorize or effect any change in its charter or bylaws;

                        (ii)  none of the Target and its Subsidiaries will grant
any Stock Rights or issue, sell or otherwise dispose of any of its capital stock
(except upon the  conversion or exercise of Stock Rights  outstanding  as of the
date of this  Agreement and except for options to purchase up to 330,000  Target
Shares to  employees  to be  designated  by the Target with the  approval of the
Purchaser,  it being  understood  that all such options  shall be granted at the
fair  market  value of the  Target  Shares as of the date of grant,  shall  vest
one-third on each of the first,  second and third anniversary of the grant date,
but shall not vest as a result of the completion of the Merger);


                                    - 22 -

<PAGE>



                        (iii) none  of  the  Target  and  its  Subsidiaries will
declare,  set aside or pay any  dividend  or  distribution  with  respect to its
capital stock (whether in cash or in kind),  or redeem,  repurchase or otherwise
acquire any of its capital stock;

                        (iv)  none  of  the Target and its Subsidiaries (1) will
have  incurred  any  indebtedness  for borrowed  money,  whether to fund working
capital  requirements,  operating  losses or  capital  expenditure  requirements
(including equipment purchases), or for any capitalized lease obligation, or (2)
will have entered into any legally binding commitment or obligation to (w) incur
any capital expenditure (including equipment purchases), (x) pay any fees, costs
or  expenses  relating to the  transactions  contemplated  hereby,  (y) make any
acquisition  earn-out payments or (z) pay any compensation  (including,  without
limitation,   "stay-bonus"  or  similar  arrangements  or  fees)  to  employees,
stockholders  or  consultants  (or any  Affiliates  thereof)  of the Target as a
result of the  consummation of the Merger,  the aggregate  amount of clauses (1)
and (2),  after giving  effect to the Closing of the  transactions  contemplated
hereby,  does not  exceed $38  million;  it being  understood  that prior to the
Closing,  the Target  agrees to advise the  Purchaser,  and to consult  with the
Purchaser,  in  connection  with  entering  into any  commitment  or  obligation
relating  to any  capital  expenditure  (including  equipment  purchases)  which
individually,   or  when  taken  together  with  related  capital   expenditures
(including equipment purchases), exceeds $50,000;

                        (v)   none  of  the  Target  and  its  Subsidiaries will
impose any Security  Interest  upon any of its assets other than in the ordinary
course of business PROVIDED,  that no such Security Interest could reasonably be
expected to have a material adverse effect on the business,  financial condition
or results of operations of the Target and its Subsidiaries taken as a whole;

                        (vi)  none of the Target and its  Subsidiaries will make
any capital  investment in, make any loan to or acquire the securities or assets
of any other  Person  other  than to or from  wholly-owned  Subsidiaries  in the
ordinary course of business;

                        (vii) none of the Target and its Subsidiaries will  make
any change in employment terms for any of its directors,  officers and employees
other than customary  increases to employees who are neither executive  officers
or directors of the Target or any Subsidiary  awarded in the ordinary  course of
business  consistent  with past  practices  (except as  provided  for in Section
5(d)(vii) of the Target Disclosure Schedule); and

                        (viii)  none  of  the  Target  and its Subsidiaries will
commit to any of the foregoing.

            In the event the Target  shall  request the  Purchaser to consent in
writing to an action  otherwise  prohibited by this Section 5(d),  the Purchaser
shall use all reasonable efforts to respond in a prompt and timely fashion,  but
may otherwise respond affirmatively or negatively in its sole discretion.

                  (e)   ACCESS.   Each Party will (and will cause  each  of  its
Subsidiaries to) permit representatives of the other Party to have access at all


                                    - 23 -

<PAGE>



reasonable  times and in a manner  so as not to  materially  interfere  with the
normal business operations of the Target and its Subsidiaries,  or the Purchaser
and its Subsidiaries,  as applicable,  to all premises,  properties,  personnel,
books, records (including tax records), contracts and documents of or pertaining
to such Party. Each Party and all of their respective representatives will treat
and hold as such any  Confidential  Information it receives from the other Party
or any of its representatives in accordance with the Confidentiality Agreement.

                  (f)  NOTICE OF  DEVELOPMENTS.  Each  Party  will  give  prompt
written  notice to the  others of any  material  adverse  development  causing a
breach of any of its own representations and warranties in Section 3 and Section
4 above.  No  disclosure by any Party  pursuant to this Section  5(f),  however,
shall be deemed to amend or supplement the Target Disclosure Letter or Purchaser
Disclosure  Letter  or to  prevent  or cure  any  misrepresentation,  breach  of
warranty or breach of covenant.

                  (g)  EXCLUSIVITY.  Neither the Target nor any of its  officers
and  directors  shall,  and the  Target  will  cause its  employees,  agents and
representatives (including,  without limitation, any investment banker, attorney
or accountant retained by the Target) not to, directly or indirectly, encourage,
initiate or solicit any inquiries or the making of any Acquisition  Proposal or,
except to the extent  required  for the  discharge  by the  Target  Board of its
fiduciary duties to the Target Stockholders as advised in writing by Kelley Drye
& Warren LLP, engage in any negotiations concerning, or provide any confidential
information or data to, or have any discussions  with, any Person relating to an
Acquisition Proposal, or otherwise assist or facilitate any effort or attempt by
any Person or entity (other than the Purchaser and the Purchaser Subsidiary,  or
their officers, directors, representatives, agents, Affiliates or associates) to
make or implement an Acquisition Proposal.  The Target will notify the Purchaser
promptly  if  any  such  inquiries  or  proposals  are  received  by,  any  such
information  is requested  from, or any such  negotiations  or  discussions  are
sought to be instituted or continued  with, the Target,  and will provide to the
Purchaser a copy of such Acquisition  Proposal.  The Target and its officers and
directors   will,  and  the  Target  will  cause  its   employees,   agents  and
representatives (including,  without limitation, any investment banker, attorney
or  accountant  retained by the Target)  to,  immediately  cease and cause to be
terminated any existing activities, discussions or negotiations with any parties
conducted  heretofore  with  respect to any of the  foregoing.  The Target  will
promptly  request  that  each  Person  to whom  any  confidential  documents  or
information  concerning  the Target was disclosed by the Target since January 1,
1997 for the  purpose of  discussing  a possible  change in control  transaction
involving  the  Target  (a  "POTENTIAL  BUYER"),   either  return  all  of  such
confidential documents and information, and all copies thereof, to the Target or
deliver a written  certification of such  destruction to the Target.  The Target
shall use all reasonable  efforts to cause each such  Potential  Buyer to comply
with such request.

                  (h)   INSURANCE AND INDEMNIFICATION.

                        (i)   The  Purchaser  will  provide  each individual who
served as a director or officer of the Target at any time prior to the Effective
Time with liability insurance for a period of six years after the Effective Time
no less  favorable in coverage and amount than any  applicable  insurance of the
Target in effect immediately prior to the Effective Time; PROVIDED,  HOWEVER, if
the existing  liability  insurance  expires, or is terminated or canceled by the

                                    - 24 -

<PAGE>



insurance  carrier during such six-year period,  the Surviving  Corporation will
use its best  efforts to obtain as much  liability  insurance as can be obtained
for the  remainder of such period for a premium not in excess (on an  annualized
basis) of 150% of the last  annual  premium  paid prior to the date  hereof.  In
fulfillment of its obligations  under this clause (i), the Purchaser may arrange
insurance  providing  coverage that in the aggregate is no less favorable to the
Target's  officers and directors  than that which is currently in effect for the
Purchaser's officers and directors.

                        (ii)  The  Purchaser  (A)  will  not  take  or knowingly
permit  to  be  taken  any  action  to  alter  or  impair  any   exculpatory  or
indemnification provisions now existing in the articles of incorporation, bylaws
or  indemnification  and  employment  agreements  of  the  Target  or any of its
Subsidiaries  for the  benefit of any  individual  who  served as a director  or
officer of the Target or any of its Subsidiaries (an "INDEMNIFIED PARTY") at any
time prior to the Effective Time, and (B) shall cause the Surviving  Corporation
to honor and fulfill such provisions  until the date which is six years from the
Effective Date; PROVIDED, HOWEVER, in the event any claim or claims are asserted
within such period,  all rights to  indemnification  in respect of such claim or
claims shall continue until the final disposition thereof.

                        (iii)  To the extent clause (i) above shall not serve to
indemnify and hold harmless an Indemnified Party, the Purchaser,  subject to the
terms and conditions of this clause (iii),  will indemnify,  for a period of six
years from the Effective Date, to the fullest extent  permitted under applicable
law,  each  Indemnified  Party  from and  against  any and all  actions,  suits,
proceedings,  hearings,  investigations,  charges, complaints,  claims, demands,
injunctions,  judgments,  orders,  decrees,  rulings,  damages, dues, penalties,
fines,  costs,  amounts paid in  settlement,  liabilities,  obligations,  taxes,
liens,  losses,  expenses  and fees,  including  all court costs and  reasonable
attorneys'  fees and expenses,  resulting  from,  arising out of, relating to or
caused  by  this  Agreement  or  any of the  transactions  contemplated  herein;
PROVIDED,  HOWEVER,  in the event any claim or claims are asserted or threatened
within such six-year  period,  all rights to  indemnification  in respect of any
such claim or claims shall continue until final  disposition of any and all such
claims. Any Indemnified Party wishing to claim indemnification under this clause
(iii), and  notwithstanding the provisions set forth in the Target's articles of
incorporation,   by-laws  or  other  agreements  respecting  indemnification  of
directors or officers, upon learning of any such claim, action, suit, proceeding
or investigation,  shall promptly notify the Purchaser thereof,  but the failure
to so notify  shall not relieve the  Purchaser  of any  liability it may have to
such  Indemnified  Party if such  failure  does  not  materially  prejudice  the
Purchaser.  In  the  event  of any  such  claim,  action,  suit,  proceeding  or
investigation  (whether  arising  before or after the Effective  Time),  (A) the
Purchaser  or the  Surviving  Corporation  shall  have the right to  assume  the
defense  thereof  and the  Purchaser  shall not be  liable  to such  Indemnified
Parties  for  any  legal  expenses  of  other  counsel  or  any  other  expenses
subsequently incurred by such Indemnified Parties in connection with the defense
thereof,  except that if the  Purchaser or the  Surviving  Corporation  fails to
assume such defense or counsel for the  Purchaser  advises that there are issues
which  raise  conflicts  of  interest  between the  Purchaser  or the  Surviving
Corporation,  on the one hand, and the Indemnified  Parties,  on the other hand,
the Indemnified Parties may retain counsel satisfactory to them, and the Target,
the  Purchaser or the Purchaser  Subsidiary  shall pay all  reasonable  fees and
expenses of such  counsel for the  Indemnified  Parties  promptly as  statements


                                    - 25 -

<PAGE>



therefor are received;  PROVIDED, HOWEVER, that the Purchaser shall be obligated
to pay  for  only  one  firm  of  counsel  for all  Indemnified  Parties  in any
jurisdiction  unless the use of one counsel for such  Indemnified  Parties would
present such counsel  with a conflict of interest,  in which case the  Purchaser
need only pay for  separate  counsel to the  extent  necessary  to resolve  such
conflict;  (B) the Indemnified Parties will reasonably  cooperate in the defense
of any such matter; and (C) the Purchaser shall not be liable for any settlement
effectuated  without  its prior  written  consent,  which  consent  shall not be
unreasonably withheld or delayed. Purchaser shall not settle any action or claim
identified  in this  Section  5(h)(iii)  in any  manner  that  would  impose any
liability or penalty on an  Indemnified  Party not paid by the  Purchaser or the
Surviving  Corporation  without such Indemnified  Party's prior written consent,
which consent shall not be unreasonably withheld or delayed.

                        (iv)  Notwithstanding anything contained in clause (iii)
above, the Purchaser shall not have any obligation  hereunder to any Indemnified
Party  (A) if the  indemnification  of  such  Indemnified  Party  in the  manner
contemplated  hereby is  prohibited  by  applicable  law, (B) the conduct of the
Indemnified  Party  relating to the matter for which  indemnification  is sought
involved bad faith or willful  misconduct,  or (C) with respect to actions taken
by any such Indemnified  Party in its individual  capacity,  including,  without
limitations,  with respect to any matters relating,  directly or indirectly,  to
the purchase,  sale or trading of  securities  issued by the Target other than a
tender or sale pursuant to a stock tender  agreement or (D) if such  Indemnified
Party shall have breached its  obligation to cooperate with the Purchaser in the
defense of any claim in respect of which indemnification is sought.

                  (i) FINANCIAL  STATEMENTS.  As soon as they are made available
to and  reviewed  by senior  management  of the  Target,  the Target  shall make
available to the Purchaser copies of all internally generated monthly, quarterly
(including,  quarterly  statements for the three-month period ended December 31,
1997) and  annual  financial  statements,  consisting  of  consolidated  balance
sheets,  and  statements  of income and of cash flows.  The delivery of any such
quarterly and annual financial  statements shall constitute a representation and
warranty by the Target that such  financial  statements  were  prepared from the
books and records of the Target,  in accordance with GAAP  consistently  applied
during the periods involved and fairly present the financial condition,  results
of  operations  and cash flows,  as the case may be, of the Target as at and for
the  periods  set forth  therein  (subject  in the case of  quarterly  financial
statements to the absence of complete footnotes other than as may be required by
GAAP and subject to normal year-end audit adjustments).

                  (j)   CONTINUITY  OF  BUSINESS   ENTERPRISE.   The  Purchaser,
Purchaser  Subsidiary or any other member of the qualified  group (as defined in
Treasury  Regulation  Section  1.368-1(d))  shall,  for the foreseeable  future,
continue at least one significant  historic  business line of the Target and use
at least a significant  portion of the Target's  historic  business  assets in a
business,  in each case  within  the  meaning  of  Treasury  Regulation  Section
1.368-1(d).

            6.    CONDITIONS TO OBLIGATION TO CLOSE.

                  (a)   CONDITIONS  TO  OBLIGATION  OF  THE  PURCHASER  AND  THE
PURCHASER SUBSIDIARY.  The obligation of each of the Purchaser and the Purchaser
Subsidiary to consummate  the  transactions  to be performed by it in connection


                                    - 26 -

<PAGE>



with the Closing is subject to  satisfaction or waiver by Purchaser or Purchaser
Subsidiary of the following conditions at or prior to the Closing Date:

                        (i)   this  Agreement and the Merger shall have received
the Requisite Stockholder Approval;

                        (ii)  the  Target  and  its  Subsidiaries   shall   have
procured  all  third-party  consents  specified  in Section 5(b) above which are
applicable to the Target and its Subsidiaries;

                        (iii) the representations and warranties  set  forth  in
Section 3 above shall be true and correct in all material  respects at and as of
the Closing Date,  except for (A) changes  contemplated by this  Agreement,  (B)
those  representations  and  warranties  which  address  matters  only  as  of a
particular date (which shall have been true and correct as of such date);

                        (iv)  the  Target shall have performed and complied with
all of its covenants hereunder in all material respects through the Closing;

                        (v)   neither  any  statute,  rule,  regulation,  order,
stipulation  or  injunction  (each an "ORDER")  shall be  enacted,  promulgated,
entered,  enforced or deemed applicable to the Merger nor any other action shall
have been taken by any governmental authority, administrative agency or court of
competent  jurisdiction (A) which prohibits the consummation of the transactions
contemplated by the Merger; (B) which prohibits the Purchaser's or the Purchaser
Subsidiary's  ownership or operation of all or any material  portion of their or
the Target's business or assets, or which compels the Purchaser or the Purchaser
Subsidiary  to dispose of or hold  separate all or any  material  portion of the
Purchaser's or the Purchaser  Subsidiary's or the Target's business or assets as
a result of the  transactions  contemplated  by the Merger;  (C) which makes the
purchase of, or payment for,  some or all of the Target Shares  illegal;  or (D)
which  imposes  material  limitations  on the  ability of the  Purchaser  or the
Purchaser Subsidiary to acquire or hold or to exercise effectively all rights of
ownership of Target Shares, including, without limitation, the right to vote any
Target Shares  purchased by the Purchaser on all matters  properly  presented to
the Target Stockholders;  or (E) which imposes any limitations on the ability of
the  Purchaser  or  the  Purchaser  Subsidiary,   or  any  of  their  respective
Subsidiaries,  effectively  to control in any  material  respect the business or
operations of the Target or any of its Subsidiaries;

                        (vi)  the Target shall have delivered to  the  Purchaser
and the  Purchaser  Subsidiary  a  certificate  to the  effect  that each of the
conditions specified above in Section  6(a)(i)-Section  6(a)(iv) is satisfied in
all respects;  PROVIDED,  HOWEVER,  with respect to Section 6(a)(i),  the Target
shall only be required to certify that this  Agreement  and the Merger  received
the Requisite Stockholder Approval of the Target Stockholders;

                        (vii) all applicable waiting periods (and any extensions
thereof)  under the  Hart-Scott-Rodino  Act shall have expired or otherwise been
terminated,   and  the  Parties   shall  have   received   all  other   material
authorizations,  consents and approvals of governments and governmental agencies
referred to in Section 3(d) and Section 4(d) above;


                                    - 27 -

<PAGE>



                        (viii) the Purchase Warrant shall have been exercised in
full, PROVIDED,  that such exercise may be conditioned upon the effectiveness of
the Merger;

                        (ix)  the Purchaser Shares to be issued  in  the  Merger
shall have been  approved  upon  official  notice of issuance  for  quotation on
Nasdaq, subject to official notice of issuance; and

                        (x)  the Registration Statement shall have been declared
effective  by the SEC under the  Securities  Act. No stop order  suspending  the
effectiveness  of the  Registration  Statement shall have been issued by the SEC
and no  proceedings  for that purpose shall have been initiated or threatened by
the SEC.

            Subject  to  the   provisions  of  applicable   law,  the  Purchaser
Subsidiary  may waive,  in whole or in part,  any  condition  specified  in this
Section 6(a) if they execute a writing so stating at or prior to the Closing.

                  (b) CONDITIONS TO OBLIGATION OF THE TARGET.  The obligation of
the Target to consummate  the  transactions  to be performed by it in connection
with the  Closing  is  subject  to  satisfaction  or waiver by the Target of the
following conditions at or prior to the Closing Date:

                        (i)   this  Agreement and the Merger shall have received
the Requisite Stockholder Approval;

                        (ii)  the  Purchaser  and  its  Subsidiaries  shall have
procured all material third-party consents specified in Section 5(b) above which
are applicable to the Purchaser and its Subsidiaries;

                        (iii) the representations and warranties  set  forth  in
Section 4 above shall be true and correct in all material  respects at and as of
the Closing Date,  except for (A) changes  contemplated by this  Agreement,  (B)
those  representations  and  warranties  which  address  matters  only  as  of a
particular date (which shall have been true and correct as of such date);

                        (iv)  each of the Purchaser and the Purchaser Subsidiary
shall have  performed and complied  with all of its  covenants  hereunder in all
material respects through the Closing;

                        (v)   neither  any  Order shall be enacted, promulgated,
entered,  enforced or deemed applicable to the Merger nor any other action shall
have been taken by any governmental authority, administrative agency or court of
competent  jurisdiction (A) which prohibits the consummation of the transactions
contemplated by the Merger; (B) which prohibits the Purchaser's or the Purchaser
Subsidiary's  ownership or operation of all or any material  portion of their or
the Target's business or assets, or which compels the Purchaser or the Purchaser
Subsidiary  to dispose of or hold  separate all or any  material  portion of the
Purchaser's or the Purchaser  Subsidiary's or the Target's business or assets as


                                    - 28 -

<PAGE>



a result of the transactions  contemplated by the Merger; or (C) which makes the
purchase of, or payment for, some or all of the Target Shares illegal;

                        (vi)  each of the Purchaser and the Purchaser Subsidiary
shall have delivered to the Target a certificate to the effect  that each of the
conditions specified above in Section 6(b)(i)-(iv) is satisfied in all respects;
PROVIDED,  HOWEVER,  with respect to  Section 6(b)(i), each of the Purchaser and
the Purchaser  Subsidiary  shall only be required to certify that this Agreement
and the  Merger received the Requisite Stockholder  Approval  of  the  Purchaser
Stockholders;

                        (vii)  the  Merger  shall  be  a  tax-free merger of the
Purchaser  Subsidiary with and into the Target in a  reorganization  pursuant to
Code Section 368(a)(2)(E);

                        (viii) all   applicable   waiting   periods   (and   any
extensions  thereof)  under the  Hart-Scott-Rodino  Act shall  have  expired  or
otherwise been terminated and the Parties shall have received all other material
authorizations,  consents and approvals of governments and governmental agencies
referred to in Section 3(d) and Section 4(d) above;

                        (ix)  the   Registration   Statement   shall  have  been
declared effective by the SEC under the Securities Act;  and

                        (x)   the  Purchaser  Shares  to be issued in the Merger
shall have been approved for quotation on Nasdaq,  subject to official notice of
issuance.

            Subject to the  provisions of applicable  law, the Target may waive,
in whole or in part, any condition specified in this Section 6(b) if it executes
a writing so stating at or prior to the Closing.

            7.    TERMINATION.

                  (a)  TERMINATION OF AGREEMENT.  The Parties may terminate this
Agreement with the prior authorization of their respective board of directors as
provided below:

                        (i)   The  Parties may terminate this Agreement, and the
Merger  may be  abandoned,  by mutual  written  consent at any time prior to the
Effective Time;

                        (ii)  This  Agreement  may  be terminated and the Merger
may be abandoned by action of the Board of Directors of either the  Purchaser or
the Target if (i) the Merger shall not have been consummated by October 31, 1998
(unless the failure to  consummate  the Merger by such date is due to the action
or failure  to act of the Party  seeking  to  terminate),  or (iii) if any Order
shall have become final and non-appealable;

                        (iii)  This Agreement may be terminated and  the  Merger
may be abandoned at any time prior to the  Effective  Time,  before or after the
approval by the Target stockholders or the Purchaser Stockholders,  by action of
the Target Board,  in the event that the  Purchaser or the Purchaser  Subsidiary
shall have breached any of their representations,  warranties or covenants under


                                    - 29 -

<PAGE>



this Agreement  which breach shall have caused a reasonable  likelihood that the
Purchaser  and the  Purchaser  Subsidiary  will  not be able to  consummate  the
Merger;

                        (iv)  This Agreement may be  terminated  and  the Merger
may be abandoned at any time prior to the  Effective  Time,  before or after the
approval by the Target Stockholders or the Purchaser Stockholders,  by action of
the Purchaser Board, in the event that the Target shall have breached any of its
representations, warranties or covenants under this Agreement which breach shall
have  caused  a  reasonable  likelihood  that  the  Target  will  not be able to
consummate the Merger;

                        (v)   (A)   This  Agreement  may  be  terminated  by the
Target and the Merger may be abandoned at any time, before or after the approval
by the Target Stockholders or the Purchaser Stockholders,  if, without violating
its obligations  under Section 5(g) hereof,  the Target enters into an agreement
with respect to an unsolicited  Acquisition  Proposal after having  received (A)
the written opinion from The Robinson-Humphrey  Company, Inc. to the effect that
such Acquisition  Proposal is more favorable to the Target  Stockholders  from a
financial  point of view than the Merger,  and (B) the written opinion of Kelley
Drye  &  Warren  LLP  that  approval,  acceptance  and  recommendation  of  such
Acquisition  Proposal  is  required  by  fiduciary  obligations  to  the  Target
Stockholders under applicable law;

                              (B)   This  Agreement  may  be  terminated  by the
Purchaser,  and the Merger may be abandoned, if the Target Board (i) enters into
or publicly  announces  its intention to enter into an agreement or agreement in
principle with respect to an Acquisition Proposal,  (ii) withdraws or materially
modifies its recommendation to the Target  Stockholders of this Agreement or the
Merger or (iii) after the receipt of an Acquisition  Proposal,  fails to confirm
publicly,  upon the request of the Purchaser,  its  recommendation to the Target
Stockholders that the Target Stockholders approve this Agreement and the Merger;

                        (vi)  This  Agreement  may  be terminated by the Target,
and the Merger may be  abandoned in the event that the  Weighted  Average  Sales
Price  of a  Purchaser  Share  as of the  Closing  Date is less  than  $14.0210;
PROVIDED,  HOWEVER,  the Purchaser may override such  termination  and reinstate
this  Agreement  within  three (3) Business  Days after it has received  written
notice of termination by the Target pursuant to this clause (vi), by delivery of
written  notice to the Target  that it agrees to pay to each  holder of a Target
Share  additional  consideration  such that,  when added to the Per Share Merger
Consideration,  each holder of Target Shares shall receive an aggregate value of
$8.8235  for  each  Target  Share  exchanged  in  the  Merger  (the  "ADDITIONAL
CONSIDERATION").  The  Additional  Consideration  may  be  paid  in  cash  or in
Purchaser  Shares, or a combination  thereof,  at the election of the Purchaser,
with each such  Purchaser  Share to be  delivered  to be valued  based  upon the
Weighted  Average  Sales  Price of a  Purchaser  Share as of the  Closing  Date.
Notwithstanding  the  foregoing,  the  amount  of cash  which  may be  delivered
pursuant  to this clause  (vi),  if any,  shall not be in an amount  which would
result in the Merger not being  qualified as a  reorganization  pursuant to Code
Section 368(a)(2)(E);

                        (vii)  Any Party may terminate this Agreement,  and  the
the Merger may be abandoned,  by giving  written  notice to the other Parties at


                                    - 30 -

<PAGE>



any time after the Target  Special  Meeting in the event that this Agreement and
the Merger  fail to receive  the  Requisite  Stockholder  Approval by the Target
Stockholders; or

                        (viii)  Any Party may terminate this Agreement, and  the
the Merger may be abandoned,  by giving  written  notice to the other Parties at
any time after the Purchaser  Special  Meeting in the event that this  Agreement
and the  Merger  fail to  receive  the  Requisite  Stockholder  Approval  by the
Purchaser Stockholders.

                  (b)   EFFECT OF TERMINATION.

                        (i)   Except as provided in clauses  (ii)  or  (iii)  of
this Section 7(b), if any Party  terminates  this Agreement  pursuant to Section
7(a) above, all rights and obligations of the Parties  hereunder shall terminate
without any  liability of any Party to any other Party (except for any liability
of any Party then in breach);  PROVIDED,  HOWEVER,  that the  provisions  of the
Confidentiality  Agreement,  this  Section  7(b) and Section  8(l) below,  shall
survive any such termination.

                        (ii)  If  this   Agreement  is  terminated  (x)  by  the
Purchaser  pursuant to Section  7(a)(iv),  but only with  respect to a breach by
Target of Section 5(g), (y) by Target  pursuant to Section  7(a)(v)(A) or (z) by
Purchaser pursuant to Section 7(a)(v)(B),  then, within five (5) days after such
termination,  the  Target  shall  pay the  Purchaser  the sum of  $5,000,000  in
immediately  available  funds,  which the Parties  agree is a reasonable  sum to
reimburse the Purchaser for costs and expenses  incurred in connection with this
Agreement.

                        (iii) If this Agreement is terminated by the Target as a
result of the Purchaser not obtaining the Requisite  Stockholder Approval by the
Purchaser Stockholders, then the Purchaser shall pay the Target, within five (5)
days after the  completion  of the meeting at which the  Purchaser  Stockholders
considered the approval of this Agreement and the Merger,  the sum of $5,000,000
in immediately  available funds,  which the Parties agree is a reasonable sum to
reimburse  the Target for costs and expenses  incurred in  connection  with this
Agreement.

            8.    MISCELLANEOUS.

                  (a)  SURVIVAL.  None of the  representations,  warranties  and
covenants  of the  Parties  (other  than  the  provisions  in  Section  2  above
concerning  payment of the Per Share Merger  Consideration and the provisions in
Section 5(h) above  concerning  insurance and  indemnification  and Section 5(i)
concerning continuity of business enterprise) will survive the Effective Time.

                  (b) PRESS  RELEASES AND PUBLIC  ANNOUNCEMENTS.  No Party shall
issue any press release or make any public announcement  relating to the subject
matter  of this  Agreement  without  the  prior  written  approval  of the other
Parties;  PROVIDED,  HOWEVER,  that any Party may make any public  disclosure it
believes in good faith is required by  applicable  law or any listing or trading
agreement   concerning  its  publicly-traded   securities  (in  which  case  the
disclosing  Party will use all  reasonable  efforts to advise the other  Parties
prior to making the disclosure).


                                    - 31 -

<PAGE>



                  (c) NO THIRD-PARTY  BENEFICIARIES.  This  Agreement  shall not
confer any rights or remedies  upon any Person  other than the Parties and their
respective  successors and permitted assigns;  PROVIDED,  HOWEVER,  that (i) the
provisions in Section 2 above (A) concerning  payment  of the Per  Share  Merger
Consideration  are intended for the benefit of the Target  Stockholders  and (B)
concerning  the  conversion of the stock options are intended for the benefit of
the holders of such stock options, and (ii) the provisions in Section 5(h) above
concerning  insurance  and  indemnification  are intended for the benefit of the
individuals specified therein and their respective legal representatives.

                  (d)  ENTIRE   AGREEMENT.   This   Agreement   (including   the
Confidentiality   Agreement  and  the  other   documents   referred  to  herein)
constitutes  the entire  agreement  among the Parties and  supersedes  any prior
understandings,  agreements or representations by or among the Parties,  written
or oral, to the extent they related in any way to the subject matter hereof.

                  (e)  BINDING  EFFECT;  ASSIGNMENT.  This  Agreement  shall  be
binding  upon and inure to the  benefit  of the  Parties  and  their  respective
successors and permitted  assigns.  No Party may assign or delegate  either this
Agreement or any of its rights, interests or obligations hereunder, by operation
of law or otherwise,  without the prior written  approval of the other  Parties.
Any purported  assignment or delegation  without such approval shall be void and
of no effect.

                  (f) COUNTERPARTS. This Agreement may be executed (including by
facsimile)  in one or more  counterparts,  each of  which  shall  be  deemed  an
original but all of which together will constitute one and the same instrument.

                  (g) HEADINGS. The section headings contained in this Agreement
are inserted for convenience only and shall not affect in any way the meaning or
interpretation of this Agreement.

                  (h) NOTICES. All notices, requests,  demands, claims and other
communications hereunder shall be in writing. Any notice, request, demand, claim
or other  communication  hereunder  shall be deemed  duly given if (and then two
business days after) it is sent by registered or certified mail,  return receipt
requested,  postage prepaid and addressed to the intended recipient as set forth
below:

      IF TO THE TARGET:                TresCom International, Inc.
      ----------------                 200 East Broward Blvd.
                                       Ft. Lauderdale, FL 33301
                                       Attention: Chief Executive Officer
                                       Fax: (954) 463-4353


                                    - 32 -

<PAGE>



      WITH A COPY TO:                  Kelley Drye & Warren LLP
      --------------                   Two Stamford Plaza
                                       281 Tresser Boulevard
                                       Stamford, Connecticut  06901-3229
                                       Fax:  (203) 351-8115
                                       Attention:  John T. Capetta, Esquire

      IF TO THE PURCHASER:             PRIMUS TELECOMMUNICATIONS GROUP INC.
      -------------------              2070 Chain Bridge Road
                                       Vienna, VA 22182
                                       K. Paul Singh, Chairman and
                                       Chief Executive Officer
                                       Fax:  (703) 902-2814

      WITH A COPY TO:                  Pepper Hamilton LLP
      --------------                   3000 Two Logan Square
                                       Eighteenth & Arch Streets
                                       Philadelphia, PA   19103-2799
                                       Fax:  (215) 981-4750
                                       Attention:  James D. Epstein, Esquire

      IF TO THE PURCHASER SUBSIDIARY:  TAURUS ACQUISITION CORPORATION
      ------------------------------   2070 Chain Bridge Road
                                       Vienna, VA 22182
                                       K. Paul Singh, Chairman and
                                       Chief Executive Officer
                                       Fax:  (703) 902-2814

      WITH A COPY TO:                  Pepper Hamilton LLP
      --------------                   3000 Two Logan Square
                                       Eighteenth & Arch Streets
                                       Philadelphia, PA   19103-2799
                                       Fax:  (215) 981-4750
                                       Attention:  James D. Epstein, Esquire

Any Party may send any notice,  request,  demand,  claim or other  communication
hereunder  to the  intended  recipient  at the  address  set forth  above  using
personal delivery,  expedited courier,  messenger service,  telecopy or ordinary
mail, but no such notice, request, demand, claim or other communication shall be
deemed to have been duly given  unless and until it  actually is received by the
intended recipient. Any Party may change the address to which notices, requests,
demands, claims and other communications hereunder are to be delivered by giving
the other Parties notice in the manner set forth in this Section 8(h),  provided
that no such change of address shall be effective  until it actually is received
by the intended recipient.

                  (i)   GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED  BY AND
CONSTRUED IN ACCORDANCE WITH THE DOMESTIC LAWS OF THE STATE OF  FLORIDA  WITHOUT


                                    - 33 -

<PAGE>



GIVING EFFECT TO ANY CHOICE OR CONFLICT OF LAW PROVISION OR RULE (WHETHER OF THE
STATE OF FLORIDA OR ANY OTHER  JURISDICTION) THAT WOULD CAUSE THE APPLICATION OF
THE LAWS OF ANY JURISDICTION OTHER THAN THE STATE OF FLORIDA.

                  (j) AMENDMENTS AND WAIVERS. The Parties may mutually amend any
provision  of this  Agreement at any time prior to the  Effective  Time with the
prior authorization of their respective boards of directors;  PROVIDED, HOWEVER,
that any amendment effected subsequent to Requisite Stockholder Approval will be
subject to the restrictions  contained in the Florida  Business  Corporation Law
and the Delaware General Corporation Law, to the extent applicable. No amendment
of any  provision of this  Agreement  shall be valid unless the same shall be in
writing and signed by all of the Parties. No waiver by any party of any default,
misrepresentation   or  breach  of  warranty  or  covenant  hereunder,   whether
intentional  or not,  shall be  deemed  to  extend  to any  prior or  subsequent
default, misrepresentation or breach of warranty or covenant hereunder or affect
in any way any  rights  arising  by  virtue  of any  prior  or  subsequent  such
occurrence.

                  (k) SEVERABILITY. Any term or provision of this Agreement that
is invalid or  unenforceable  in any  situation  in any  jurisdiction  shall not
affect the validity or  enforceability  of the  remaining  terms and  provisions
hereof or the validity or  enforceability  of the offending term or provision in
any other situation or in any other jurisdiction.

                  (l) EXPENSES.  Except as expressly set forth elsewhere in this
Agreement,  each of the Parties will bear its own costs and expenses  (including
legal fees and  expenses)  incurred in  connection  with this  Agreement and the
transactions contemplated hereby.

                  (m) CONSTRUCTION. The Parties have participated jointly in the
negotiation  and  drafting  of this  Agreement.  In the  event an  ambiguity  or
question of intent or interpretation  arises,  this Agreement shall be construed
as if drafted jointly by the Parties and no presumption or burden of proof shall
arise  favoring or  disfavoring  any Party by virtue of the authorship of any of
the provisions of this Agreement.  Any reference to any federal, state, local or
foreign  statute  or law  shall  be  deemed  also  to  refer  to all  rules  and
regulations promulgated  thereunder,  unless the context otherwise requires. The
word "including" shall mean including without  limitation.  The phrase "business
day" shall mean any day other than a day on which banks in the State of New York
are required or authorized to be closed.  Any disclosure  made with reference to
one or more sections of the Target Disclosure Schedule shall be deemed disclosed
with  respect to each other  section  therein  as to which  such  disclosure  is
relevant provided that such relevance is reasonably apparent.  Disclosure of any
matter in the Target Disclosure  Schedule or the Purchaser  Disclosure  Schedule
shall not be deemed an admission that such matter is material.

                  (n) INCORPORATION OF EXHIBITS AND SCHEDULES.  The Exhibits and
Schedules  identified in this Agreement are incorporated herein by reference and
made a part hereof.


                                    - 34 -

<PAGE>



                  (o)  DEFINITION  OF  KNOWLEDGE.  As  used  herein,  the  words
"knowledge",  "best  knowledge" or "known" shall, (i) with respect to the Target
or Target  management,  mean the actual  knowledge  of the  corporate  executive
officers of the Target,  in each case after such  individuals  have made due and
diligent inquiry as to the matters which are the subject of the statements which
are "known" by the Target or made to the "knowledge" or "best  knowledge" of the
Target, (ii) with respect to the Purchaser or the Purchaser management, mean the
actual knowledge of the corporate  executive officers of the Purchaser,  in each
case after such individuals have made due and diligent inquiry as to the matters
which are the subject of the  statements  which are "known" by the  Purchaser or
made to the  "knowledge" or "best  knowledge" of the  Purchaser,  and (iii) with
respect to the Purchaser Subsidiary or the Purchaser Subsidiary management, mean
the actual knowledge of the corporate executive officers of the Purchaser or the
Purchaser  Subsidiary,  in each case  after such  individuals  have made due and
diligent inquiry as to the matters which are the subject of the statements which
are "known" by the  Purchaser  Subsidiary  or made to the  "knowledge"  or "best
knowledge" of the Purchaser Subsidiary.

                  (p) WAIVER OF JURY TRIAL. EACH OF THE PURCHASER, THE PURCHASER
SUBSIDIARY  AND THE  TARGET,  AND EACH  INDEMNIFIED  PARTY,  HEREBY  IRREVOCABLY
WAIVES,  TO THE FULLEST EXTENT  PERMITTED BY LAW, ALL RIGHTS TO TRIAL BY JURY IN
ANY ACTION,  PROCEEDING OR  COUNTERCLAIM  (WHETHER BASED UPON CONTRACT,  TORT OR
OTHERWISE)  ARISING  OUT  OF OR  RELATING  TO  THIS  AGREEMENT  OR  ANY  OF  THE
TRANSACTIONS CONTEMPLATED HEREBY.




                                    - 35 -

<PAGE>


      IN WITNESS WHEREOF,  the Parties hereto have executed this Agreement as of
the date first above written.

                                   PRIMUS COMMUNICATIONS
                                   GROUP, INC.



                                   By:  /S/ K. PAUL SINGH
                                        ----------------------------------------
                                   Name:  K. Paul Singh
                                   Title:  President and Chief Executive Officer


                                   TAURUS ACQUISITION CORPORATION



                                   By:  /S/ K. PAUL SINGH
                                        ----------------------------------------
                                   Name:  K. Paul Singh
                                   Title:  President


                                   TRESCOM INTERNATIONAL, INC.



                                   By: /S/ WESLEY T. O'BRIEN
                                       -----------------------------------------
                                   Name:  Wesley T. O'Brien
                                   Title:  President and Chief Executive Officer


                                    - 36 -





                             STOCKHOLDER AGREEMENT


            STOCKHOLDER  AGREEMENT (this  "AGREEMENT"),  dated as of February 3,
1998 by and among Warburg, Pincus Investors, LLP, a Delaware limited partnership
("Stockholder"),  PRIMUS  TELECOMMUNICATIONS GROUP, INC., a Delaware corporation
("PURCHASER"),  Taurus  Acquisition  Corporation,  a Florida  corporation  and a
wholly-owned  subsidiary  of  Purchaser  ("PURCHASER  SUBSIDIARY"),  and K. Paul
Singh, a resident of the Commonwealth of Virginia (the "EXECUTIVE").

                             W I T N E S S E T H:

            WHEREAS,  concurrently herewith,  Purchaser,  TRESCOM INTERNATIONAL,
INC., a Florida corporation  ("COMPANY"),  and Purchaser Subsidiary are entering
into an  Agreement  and  Plan of  Merger  of even  date  herewith  (the  "MERGER
AGREEMENT"),  pursuant to which  Purchaser  will acquire all of the  outstanding
shares of common stock, $0.0419 par value per share (the "COMMON STOCK"), of the
Company,  pursuant to a reverse  triangular merger of Purchaser  Subsidiary with
and into Company (the "MERGER");

            WHEREAS,  the  Stockholder  owns,  as of the date hereof,  6,319,468
shares of Common  Stock  (the  "EXISTING  SHARES",  together  with any shares of
Common Stock acquired after the date hereof and prior to the termination  hereof
(including  358,034 shares of Common Stock acquired  pursuant to the exercise of
the warrant  dated  October 2, 1995 issued by the  Company to  Stockholder  (the
"WARRANT")), hereinafter collectively referred to as the "SHARES");

            WHEREAS,  as a  condition  to their  willingness  to enter  into the
Merger  Agreement,   and  in  reliance  upon  Stockholder's     representations,
warranties,  covenants and  agreements  hereunder,  Purchaser has requested that
Stockholder agree, and Stockholder has agreed, to enter into this Agreement; and

            WHEREAS, this Agreement is  being entered into concurrently with the
execution of the Merger Agreement;

            NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and
agreements herein contained and for such other good and valuable  consideration,
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, it is agreed as follows:

1. AGREEMENT TO VOTE.

            1.1.  Stockholder  hereby agrees that, except as expressly set forth
below,  during  the time this  Agreement  is in  effect,  at any  meeting of the
stockholders  of Company,  however  called,  and in any action by consent of the
stockholders of Company,  Stockholder shall: (a) vote the Shares in favor of the
Merger; (b) vote the Shares against any action or agreement that would result in
a breach of any covenant,  representation or warranty or any other obligation or
agreement of Company under the Merger Agreement; (c) vote the Shares against any
action or


<PAGE>


agreement  that would  impede,  interfere  with,  delay,  postpone or attempt to
discourage  the Merger  including,  but not  limited  to, (i) any  extraordinary
corporate  transaction (other than the Merger), such as a merger, other business
combination,  recapitalization,   reorganization  or  liquidation  (a  "BUSINESS
COMBINATION  TRANSACTION")  involving  Company,  (ii) a sale  or  transfer  of a
material  amount of  assets of  Company  or any of its  Subsidiaries,  (iii) any
change in the  management or board of directors of Company,  except as otherwise
agreed to in writing  by  Purchaser,  (iv) any  material  change in the  present
capitalization of the Company, or (v) any other material change in the corporate
structure  or business  of Company;  and (d)  without  limiting  the  foregoing,
consult  with  Purchaser  prior to any such  vote and vote  such  Shares in such
manner as is determined by Purchaser to be in compliance  with the provisions of
this  Section 1.  Stockholder  acknowledges  receipt and review of a copy of the
Merger Agreement. In furtherance of this Section 1, Stockholder hereby grants to
Purchaser an irrevocable  proxy to vote the Shares in accordance  with the terms
and conditions of this Agreement, it being understood that such proxy is coupled
with an interest;  PROVIDED,  HOWEVER, such proxy shall automatically  terminate
upon the termination of the Merger Agreement in accordance with its terms.

2. PARTICIPATION RIGHTS.

            2.1.  Subject to the terms and conditions  set forth herein,  in the
event that the Merger Agreement is terminated  pursuant to  s.7(a)(iv) (but only
if such  termination is as a result of a  breach by the Company of s.5(g) of the
Merger Agreement) or s.7(a)(v) of the  Merger Agreement,  and, upon or following
such  termination,  a  definitive  agreement  with  respect  to  a  Third  Party
Transaction  (as defined below) is executed by the Company and a Third Party (as
defined  below)  prior  to or  within  90  days  of  such  termination,  and the
Stockholder  receives  any  cash or  non-cash  consideration  (the  "ALTERNATIVE
CONSIDERATION")  in  respect of all or any  portion of the Shares in  connection
with such  Third  Party  Transaction,  the  Stockholder  within  five days after
receipt  of the  Alternative  Consideration  (or  after  the date  the  value of
non-cash  Alternative  Consideration  is determined as provided below) shall pay
over to Purchaser  or its  designee,  an amount equal in value to fifty  percent
(50%) of the excess (if any) of (x) such Alternative  Consideration OVER (y) (A)
$10 per Share  multiplied  by (B) the number of Shares with respect to which the
Stockholder  received  such  Alternative   Consideration.   If  the  Alternative
Consideration  received  by the  Stockholder  shall be  securities  listed  on a
national securities exchange or traded on the Nasdaq National Market ("NASDAQ"),
the per share value of such  consideration  shall be equal to the closing  price
per share listed on such national securities exchange or NASDAQ on the date such
transaction is consummated; and if the consideration received by the Stockholder
shall be in a form other than such  listed or traded  securities,  the per share
value  shall be  determined  in good  faith as of the date such  transaction  is
consummated  by the  Purchaser or its designee and the  Stockholder,  or, if the
Purchaser or its  designee and the  Stockholder  cannot  reach  agreement,  by a
nationally  recognized  investment  banking firm  reasonably  acceptable  to the
Purchaser and the Stockholder.

            2.2. The term "THIRD  PARTY  TRANSACTION"  shall mean a  transaction
constituting an Acquisition Proposal (as defined in the Merger Agreement) with a
person or entity other than any of the  Purchaser  Companies,  as defined in the
Merger Agreement (a "THIRD PARTY").


                                    - 2 -

<PAGE>



3. REPRESENTATIONS   AND   WARRANTIES   OF  STOCKHOLDER.  Stockholder represents
and warrants to Purchaser and Purchaser Subsidiary as follows:

            3.1. OWNERSHIP OF SHARES. On the date hereof the Existing Shares are
all of the Shares  currently  beneficially  owned  (which,  for purposes of this
Agreement shall be determined in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the "EXCHANGE ACT")) by the Stockholder or any
Affiliate  (as  defined  in the Merger  Agreement)  of the  Stockholder.  On the
Closing Date, the Shares will constitute all of the shares of Common Stock owned
beneficially  by  Stockholder or any Affiliate of the  Stockholder.  Stockholder
does not have any  rights to  acquire  any  additional  shares of Common  Stock.
Stockholder  currently has with respect to the Existing  Shares,  and at Closing
will have with respect to the Shares, good, valid and marketable title, free and
clear of all liens,  encumbrances,  restrictions,  options,  warrants, rights to
purchase,  voting  agreements or voting trusts,  and claims of every kind (other
than the encumbrances  created by this Agreement and other than  restrictions on
transfer under applicable Federal and State securities laws).

            3.2. POWER; BINDING AGREEMENT. Stockholder has the full legal right,
power and authority to enter into and perform all of  Stockholder's  obligations
under  this  Agreement.   The  execution  and  delivery  of  this  Agreement  by
Stockholder will not violate any other agreement to which Stockholder is a party
including,  without limitation,  any voting agreement,  stockholder agreement or
voting trust. This Agreement has been duly executed and delivered by Stockholder
and constitutes a legal, valid and binding agreement of Stockholder, enforceable
in  accordance  with its  terms.  Neither  the  execution  or  delivery  of this
Agreement nor the consummation by Stockholder of the  transactions  contemplated
hereby  will  (a)  require  any  consent  or  approval  of or  filing  with  any
governmental  or other  regulatory  body other than filings  required  under the
federal  securities  laws, or (b)  constitute a violation  of,  conflict with or
constitute  a default  under,  any  material  contract,  commitment,  agreement,
understanding, arrangement or other restriction of any kind to which Stockholder
is a party or by which Stockholder is bound.

            3.3.  FINDER'S FEES.  No  person  is,  or  will  be, entitled to any
commission or finder's fees from Stockholder in  connection with  this Agreement
or the transactions contemplated hereby exclusive  of any commission or finder's
fees referred to in the Merger Agreement.

4. REPRESENTATIONS  AND  WARRANTIES  OF  PURCHASER.   Purchaser  represents  and
warrants to Stockholder as follows:

            4.1. AUTHORITY.  Purchaser has full legal right, power and authority
to enter into and  perform  all of its  obligations  under this  Agreement.  The
execution and delivery of this Agreement by Purchaser will not violate any other
agreement to which  Purchaser is a party.  This Agreement has been duly executed
and delivered by Purchaser and constitutes a legal,  valid and binding agreement
of Purchaser, enforceable in accordance with its terms. Neither the execution of
this  Agreement  nor  the   consummation   by  Purchaser  of  the   transactions
contemplated  hereby  will (a) require any consent or approval of or filing with
any  governmental or other regulatory body other than filings required under the


                                    - 3 -

<PAGE>


federal  securities  laws, or (b)  constitute a violation  of,  conflict with or
constitute  a default  under,  any  material  contract,  commitment,  agreement,
understanding,  arrangement or other  restriction of any kind to which Purchaser
is a party or by which it is bound.

            4.2.  FINDER'S  FEES.  No  person  is, or  will  be, entitled to any
commission or finder's fee from Purchaser in  connection  with this Agreement or
the transactions contemplated  hereby  exclusive of  any  commission or finder's
fees referred to in the Merger Agreement.

5.  TERMINATION.  This  Agreement  shall  terminate  on the  earliest of (a) the
Effective Time (as defined in the Merger  Agreement),  (b) the date  immediately
following the termination of the Merger  Agreement in accordance with its terms,
and (c) October 31, 1998; PROVIDED,  however, the provisions of Sections 5 and 6
shall survive any termination of this Agreement,  and the provisions of Sections
8.3,  8.4, 8.5, 8.7 and 9 shall  survive the  Effective  Time if this  Agreement
otherwise terminates at the Effective Time.

6.  EXPENSES.  Except  as  provided  in  Section  20,  each  party   hereto will
pay all of its expenses in connection with the transactions contemplated by this
Agreement, including, without limitation, the fees and  expenses of  its counsel
and other advisers.

7. CONFIDENTIALITY.  Stockholder recognizes that successful  consummation of the
transactions   contemplated   by   this   Agreement   may  be   dependent   upon
confidentiality  with  respect to these  matters.  In this  connection,  pending
public disclosure, Stockholder agrees that it will not disclose or discuss these
matters with anyone (other than officers,  directors, legal counsel and advisors
of the  Stockholder  or the  Company,  if any)  not a party  to this  Agreement,
without prior written consent of Purchaser, except for filings required pursuant
to the Exchange Act, and the rules and  regulations  thereunder,  or disclosures
Stockholder's legal counsel advises in writing are necessary in order to fulfill
Stockholder's  obligations imposed by law, in which event Stockholder shall give
prompt prior notice of such disclosure to Purchaser.

8. COVENANTS

            8.1.  Except in accordance  with the  provisions of this  Agreement,
Stockholder  agrees,  prior to the  termination of this Agreement as provided in
Section 5 above, not to, directly or indirectly:

                  (a) sell,  transfer,  pledge,  encumber,  assign or  otherwise
dispose  of,  or enter  into  any  contract,  option  or  other  arrangement  or
understanding  with  respect  to  the  sale,  transfer,   pledge,   encumbrance,
assignment or other disposition of, any of the Shares;

                  (b) grant any proxies,  deposit any Shares into a voting trust
or enter into a voting agreement with respect to any Shares; or

                  (c) take any action to  encourage,  initiate  or  solicit  any
inquiries  or the making of any  Acquisition  Proposal (as defined in the Merger
Agreement) or engage in any negotiations concerning, or provide any confidential
information or data to, or have any discussions  with, any person relating to an


                                    - 4 -

<PAGE>


Acquisition  Proposal or otherwise assist or facilitate any effort or attempt by
any person or entity (other than  Purchaser and Purchaser  Subsidiary,  or their
officers, directors, representatives,  agents, affiliates or associates) to make
or implement an Acquisition  Proposal.  Stockholder will  immediately  cease and
cause to be terminated any existing  activities,  discussions or negotiations on
its part  with any  parties  conducted  heretofore  with  respect  to any of the
foregoing,  and will notify  Purchaser  Subsidiary and Purchaser  promptly if it
becomes  aware of any such  inquiries or that any proposals are received by, any
such information is requested from, or any such  negotiations or discussions are
sought to be  instituted  or  continued  with,  the  Company  (or its  officers,
directors,  representatives,  agents, affiliates or associates),  such notice to
include the material terms  communicated;  PROVIDED HOWEVER,  that the foregoing
shall  not  restrict  the  Stockholder  or  any of  its  representatives  on the
Company's  board of directors from taking actions to the same extent and only in
the same  circumstances  permitted  for the Company and the  Company's  board of
directors under Section 5(g) of the Merger Agreement.

            8.2.  Stockholder  agrees,  while this  Agreement  is in effect,  to
notify  Purchaser  promptly of the number of any shares of Common Stock acquired
by Stockholder after the date hereof.

            8.3.  Stockholder  agrees that neither it nor any of its  Affiliates
(as such term is defined in the Merger Agreement) will,  directly or indirectly,
unless in any such case specifically invited in writing to do so by the board of
directors of Purchaser,  for a period of 3 years from the date hereof, except as
otherwise expressly set forth in this Agreement or in the Merger Agreement:  (i)
individually or together with one or more persons, acquire beneficial ownership,
offer to acquire or agree to acquire,  or  participate  in the  financing of any
acquisition of, beneficial  ownership of any securities of Purchaser entitled to
vote in the general  election of directors,  or securities  convertible  into or
exercisable for such  securities  (collectively,  "SECURITIES");  (ii) initiate,
propose,  engage or otherwise participate in the solicitation of Stockholders or
their  proxies for  approval of one or more  stockholder  proposals  (including,
without limitation,  the election of directors,  any amendment to the charter or
bylaws,  or any Business  Combination  Transaction)  with respect to  Purchaser;
(iii)  otherwise  act  alone or in  concert  with any  other  person  to seek to
influence or control the management, Board of Directors,  policies or affairs of
Purchaser, or to solicit,  propose or encourage any other person with respect to
any form of Business Combination Transaction with Purchaser, or to solicit, make
or propose or encourage  any other person with respect to, or announce an intent
to make,  any tender offer or exchange  offer for any  Securities;  (iv) request
Purchaser or its Board of Directors,  officers, employees or agents, to amend or
waive,  or seek any  modification  to, any provision of this Section 8.3; or (v)
take any action  designed  to or which can  reasonably  be  expected  to require
Purchaser to make a public announcement regarding any of the matters referred to
in this Section 8.3.  Notwithstanding anything to the contrary contained herein,
the provisions of this Section 8.3 shall  automatically  terminate if the Merger
Agreement  terminates in accordance  with its terms without  consummation of the
Merger. Notwithstanding anything to the contrary, the provisions of this Section
8.3 shall not be  applicable to  "Stockholder  Affiliated  Entities",  or to any
portfolio  company of the Stockholder or of any venture fund which is related to
the Stockholder,  or to any  representative or employee of the Stockholder or of
any related  venture  fund  serving as a member of the board of directors on any
such portfolio  company.  The term  "Stockholder  Affiliated  Entities"  means a
registered  broker-dealer and another affiliated entity of Stockholder that is a

                                    - 5 -

<PAGE>



registered   investment  adviser,  as  well  as  certain  registered  investment
companies that may be deemed to be Affiliates of the Stockholder.

            8.4.  Stockholder agrees to provide Purchaser with reasonable notice
prior to the  distribution of the  Registrable  Securities (as defined below) to
its general and limited partners.

            8.5. At the effective time of the Merger,  Purchaser agrees to cause
the board of directors of Purchaser  ("PURCHASER  BOARD") to increase the number
of directors by one and take any other action to facilitate  the  nomination and
appointment  of  the   Stockholder   Nominee.   Following  such  nomination  and
appointment  of  the  Stockholder   Nominee,  and  continuing  for  so  long  as
Stockholder  beneficially owns (which, for purposes of this Section 8.5 shall be
determined in accordance with Rule 13d-3 under the Exchange Act; PROVIDED,  that
beneficial  ownership  shall be  determined  without  reference  to Shares which
Stockholder  may  acquire  either  (x)  pursuant  to the  exercise  of  options,
warrants,  or other rights to purchase Shares, or (y) pursuant to the conversion
or exchange of securities which are convertible or exchangeable  into Shares) at
least 10% of the outstanding  shares of common stock,  par value $.01 per share,
of  Purchaser  ("PURCHASER  COMMON  STOCK"),   Purchaser  agrees  to  cause  the
nomination from time to time of the Stockholder  Nominee to serve as a member of
the Purchaser  Board and to submit the Stockholder  Nominee to its  stockholders
for election to the  Purchaser  Board,  all in  accordance  with the  procedures
applicable to the election of members of the Purchaser Board generally.  As used
herein,  "STOCKHOLDER NOMINEE" shall mean such person designated by Stockholder,
and subject to the  reasonable  approval of the  non-employee  directors  of the
Purchaser, to serve on the Purchaser Board.

            8.6.  No later  than  immediately  prior to the  Effective  Time (as
defined in the Merger  Agreement),  Stockholder  shall  exercise  the Warrant in
full.

            8.7. If, at any time after the Effective Time, the Executive  enters
into an agreement with a Third Party purchaser (the "THIRD PARTY  PURCHASER") to
sell all or any portion of his shares of common stock,  par value $.01 per share
(the "PURCHASER SHARES"),  other than Purchaser Shares to be sold pursuant to an
Excluded  Transaction (as defined  below),  the Executive will make provision in
his agreement with the Third Party  Purchaser  pursuant to which the Stockholder
may sell to the  Third  Party  Purchaser,  at the same  price and  otherwise  on
substantially the same terms and conditions as the Executive,  its Proportionate
Share (as defined  below) of the Purchaser  Shares to be sold to the Third Party
Purchaser. The Executive will give written notice of the proposed transaction at
least 15 days prior to the proposed  closing date and such notice shall  include
the name and address of the Third Party Purchaser, the proposed closing date and
a reasonably detailed  description of the terms and conditions pursuant to which
Stockholder may join in the proposed  transaction.  Within 10 days after receipt
of such notice,  the Stockholder  shall notify the Executive and the Third Party
Purchaser  of  the  number  of  Purchaser   Shares,  up  to  a  maximum  of  its
Proportionate  Share,  which it  intends  to sell,  if any,  to the Third  Party
Purchaser  and,  at the  election of the Third  Party  Purchaser,  the number of
Purchaser  Shares which it shall purchase either (a) shall be increased by up to
the number of Purchaser Shares sought to be sold by the Stockholder,  and/or (b)
the number of shares which the Executive shall sell to the Third Party Purchaser
shall be decreased by up to that number of Purchaser Shares sought to be sold by


                                    - 6 -

<PAGE>



the Stockholder.  As used herein, the Stockholder's  "PROPORTIONATE SHARE" shall
be determined  by  multiplying  (i) the number of Purchaser  Shares sought to be
sold to the Third  Party  Purchaser  by (ii) the  quotient  of (A) the number of
Purchaser Shares beneficially owned by the Stockholder on the date the Executive
gave notice of the proposed  transaction to the Stockholder,  divided by (B) the
sum of (x) the number of Purchaser Shares beneficially owned by the Executive on
the date it gave notice of the proposed  transaction to the Stockholder plus (y)
the number of Purchaser Shares beneficially owned by the Stockholder on the date
the Executive  gave notice of the proposed  transaction to the  Stockholder.  As
used  herein,  the  term  "EXCLUDED  TRANSACTION"  shall  mean:  (i) any sale of
Purchaser  Shares  by  the  Executive  effected  in  accordance  with  Rule  144
promulgated under the Securities Act of 1933, as amended (the "SECURITIES ACT"),
or any successor rules or regulations;  (ii) any transfer of Purchaser Shares by
the Executive,  or the grant of any right or interest therein,  or any agreement
to do any of the foregoing, to the Executive's spouse, one or more of his lineal
descendants,  siblings or the lineal  descendants  of his siblings,  or a trust,
custodian or guardian for the benefit of one or more of such lineal  decendants,
siblings or the lineal decendants of his siblings,  PROVIDED,  THAT, in the case
of this clause (ii), as a condition to such transfer, the transferee enters into
a written agreement to be bound by the terms and conditions of this Section 8.7;
(iii) to a foundation  or other  charitable  organization  established  by or on
behalf of the  Executive  or his  spouse;  or (iv) the first  500,000  Purchaser
Shares  transferred by the Executive  after the date of this Agreement (it being
understood  that if there  shall  occur any  change in the  Purchaser  Shares by
reason of any stock dividend, extraordinary dividend or distribution,  split-up,
recapitalization,  combination,  exchange  of shares or the like,  the number of
Purchaser  Shares  set  forth  in  this  clause  (iv)  shall  be  proportionally
adjusted).

9. REGISTRATION RIGHTS.

            9.1.  DEFINITIONS.  As  used  herein,  unless  the context otherwise
requires, the following terms have the following respective meanings:

                  "COMMISSION"  means the United States  Securities and Exchange
Commission or any other federal agency at the time  administering the Securities
Act.

                  "REGISTRABLE   SECURITIES"  means  all  the  Purchaser  Shares
received by the Stockholder at the Effective Time,  together with any additional
Purchaser  Shares received by the Stockholder as a result of any stock dividend,
extraordinary dividend or distribution, split-up, recapitalization, combination,
exchange of shares or the like and involving the  Purchaser  Shares  received by
the Stockholder at the Effective Time; PROVIDED,  HOWEVER, such securities shall
cease to be  Registrable  Securities  when they  become  freely  saleable to the
public under Rule 145(d) and Rule 144,  without volume  limitation,  as the case
may be.

                  "REGISTRATION  EXPENSES"  means all  expenses  incurred by the
Purchaser incident to the Purchaser's  performance of this Section 9, including,
without  limitation,  all  registration,  filing  and  National  Association  of
Securities  Dealers,  Inc.  fees,  all listing  fees,  all fees and  expenses of
complying  with  securities  or blue sky laws  (including,  without  limitation,
reasonable fees and  disbursements of counsel for the underwriters in connection
with  blue sky  qualifications  of the  Registrable  Securities),  all  printing
expenses,  the fees and  disbursements  of counsel for the  Purchaser and of the


                                    - 7 -

<PAGE>


Purchaser's independent public accountants,  including the expenses of "comfort"
letters,  its expenses incurred in connection with any "roadshow"  presentations
in which it may  participate  and any fees  and  disbursements  of  underwriters
customarily paid by issuers or sellers of securities.

                  "SELLING   EXPENSES"  means  all  expenses   incurred  by  the
Stockholder  incident  to the  Stockholder's  performance  of  this  Section  9,
including,  without limitation, all underwriting discounts and commissions,  the
fees and  disbursements  of its advisors,  including its counsel (other than the
fees and expenses of one counsel for the Stockholder)  and its accountants,  and
its expenses  incurred in connection with any "roadshow"  presentations in which
it may participate.

            9.2.  REQUESTED REGISTRATION.

                  (a) At such time as the  Purchaser's  obligations  to register
shares set forth in that certain  registration rights agreement dated as of July
31, 1996 between the Purchaser and Quantum Industrial  Partners LDC, S-C Phoenix
Holdings,   L.L.C.,  Winston  Partners  II  LDC  and  Winston  Partners  II  LLC
(collectively,  the "CHATERJEE GROUP") have terminated (the "PRIOR  AGREEMENT"),
or the Purchaser  otherwise  amends, or obtains a waiver of, the Prior Agreement
which  permits  the  granting  of  registration  rights  upon the request of the
Stockholder,   which  the  Purchaser  hereby  agrees  to  use  its  commercially
reasonable  efforts  to secure on behalf of the  Stockholder,  upon the  written
request (the  "REQUEST") of the  Stockholder,  the  Purchaser  shall cause to be
filed under the Securities Act a registration statement on such form as selected
by the  Stockholder  (with the  approval  of the  Purchaser,  which shall not be
unreasonably  withheld) of all or such portion of the Registrable  Securities so
requested by the Stockholder, and the Purchaser shall take reasonable actions to
effect,  as soon as  practicable,  subject to the reasonable  cooperation of the
Stockholder,   within  120  days  after  the  Request  is   received   from  the
Stockholders,  the  registration  under the Securities  Act, of the  Registrable
Securities  which  the  Purchaser  has  been so  requested  to  register  by the
Stockholder.  Whenever the  Purchaser  shall effect a  registration  pursuant to
Section 9.2(a) which is an  underwritten  public  offering by the Stockholder of
Registrable  Securities,  holders  of  securities  of  the  Purchaser  who  have
"piggyback"  registration rights may include all or a portion of such securities
in such  registration,  offering or sale;  PROVIDED,  HOWEVER,  if the  managing
underwriter of any such public  offering shall inform the Purchaser by letter of
its belief that the number or type of securities  of the Purchaser  requested by
holders of the  securities of the  Purchaser  other than the  Stockholder  to be
included  in  such  registration  would  materially  and  adversely  affect  the
underwritten  public  offering,   then  the  Purchaser  shall  include  in  such
registration,  to the  extent of the  number  and type of  securities  which the
Purchaser is so advised can be sold in such Public  Offering,  first, all of the
Registrable  Securities  specified by the Stockholder in the Request and second,
for each holder of the Purchaser's  securities other than the  Stockholder,  the
fraction of each holder's securities proposed to be registered which is obtained
by dividing (i) the number of the  securities of the Purchaser  that such holder
proposes to include in such  registration by (ii) the total number of securities
proposed  to be  included in such  registration  by all  holders  other than the
Stockholder.

                  (b)  EXPENSES.   The  Purchaser  shall  pay  the  Registration
Expenses in connection with any registration  effected  pursuant to this Section
9.2 and the  Stockholder  shall pay the Selling  Expenses in connection with any
registration effected pursuant to this Section 9.2.


                                    - 8 -

<PAGE>


                  (c)  EFFECTIVE REGISTRATION.  Notwithstanding anything to  the
contrary herein, a registration requested pursuant to this Section 9.2 shall not
be deemed to have been effected  unless a  registration  statement  with respect
thereto has become effective and either remains continuously effective,  without
interruption by any stop order for a period not to exceed the earlier of (i) 180
days following the effective date of such registration or (ii) the date when the
Purchaser  Shares  sought to be offered  and sold  pursuant  thereto are in fact
offered and sold in accordance  with the terms of such offering (the  "EFFECTIVE
PERIOD").

                  (d)  SELECTION  OF  UNDERWRITERS.   In  connection  with  each
underwritten  public  offering  effected  pursuant to this  Section 9.2, (a) the
Purchaser shall promptly select the managing underwriter subject to the approval
of the Stockholder,  which approval shall not be unreasonably withheld,  delayed
or conditioned by the Stockholder, and (b) if it so desires, the Stockholder may
promptly  select the  co-managing  underwriter  subject to the  approval  of the
Purchaser  (which  approval  shall  not be  unreasonably  withheld,  delayed  or
conditioned by the Purchaser).

                  (e)  LIMITATIONS ON  REGISTRATION.  The Purchaser shall not be
required to file a  registration  statement  pursuant to this  Section 9.2 which
would become  effective  within (i) 180 days  following the effective  date of a
registration statement (other than a registration statement filed on Form S-4 or
S-8)  filed  by the  Purchaser  with the  Commission  pertaining  to any  public
offering for the account of the Purchaser or another holder of securities of the
Purchaser if the  Stockholder  was afforded the  opportunity to include at least
1,000,000  Purchaser  Shares (it being  understood that if there shall occur any
change in the  Purchase  Shares by reason of any stock  dividend,  extraordinary
dividend or distribution, split-up,  recapitalization,  combination, exchange of
shares or the like,  the number of  Purchaser  Shares set forth  herein shall be
proportionally  adjusted)  in such  registration  pursuant to Section 9.3. In no
event shall the  Purchaser be required to effect more than one (1)  registration
pursuant to Section 9.2.  Notwithstanding  the foregoing,  if, in the good faith
determination  of the  Purchaser's  Board of  Directors,  a  registration  would
adversely affect certain  activities of the Purchaser to the material  detriment
of the  Purchaser,  then  the  Purchaser  may at its  option  direct  that  such
registration  be delayed for a period not in excess of 90 days in the  aggregate
from the date of the  Purchaser's  receipt of the Request or from the first date
upon which the Purchaser is required to effect the registration  contemplated by
Section 9.2, as applicable (the "PERIOD OF DELAY").

            9.3.  PIGGYBACK REGISTRATION.

                  (a) RIGHT TO INCLUDE REGISTRABLE SECURITIES.  If the Purchaser
at any time proposes to register any of its securities  under the Securities Act
by  registration  on Forms S-1, S-2,  S-3) or any  successor or similar  form(s)
(except  registrations on such forms or similar forms solely for registration of
securities  in  connection  with  (i)  an  employee  benefit  plan  or  dividend
reinvestment plan or a merger or consolidation or (ii) debt securities which are
not convertible into Common Stock), whether or not for sale for its own account,
it shall each such time give written notice to the  Stockholder of its intention
to do so at least 30 days prior to the anticipated filing date of a registration
statement  with  respect  to such  registration  with the  Commission.  Upon the
written  request of the  Stockholder  made as promptly as practicable and in any
event  within 10  business  days  after the  receipt of any such  notice,  which
request shall specify the Registrable  Securities  intended to be disposed of by



                                    - 9 -

<PAGE>



the  Stockholder,  the  Purchaser  shall use  reasonable  efforts  to effect the
registration  under the Securities Act of all Registrable  Securities  which the
Purchaser  has been so  requested  to  register  by the  Stockholder;  PROVIDED,
HOWEVER,  that if, at any time after giving  written  notice of its intention to
register any  securities  and prior to the  effective  date of the  registration
statement  filed in  connection  with such  registration,  the  Purchaser  shall
determine  for any  reason  not to  register  or to delay  registration  of such
securities,  the  Purchaser  may, at its election,  give written  notice of such
determination  to the Stockholder and (i) in the case of a determination  not to
register,  shall be  relieved of its  obligation  to  register  any  Registrable
Securities in connection with such registration,  without  prejudice,  PROVIDED,
HOWEVER,  that the Stockholder may request that such registration be effected as
a registration  under Section 9.2.  hereof if such  registration  right was then
available to the Stockholder under Section 9.2 hereof) and (ii) in the case of a
determination to delay registering,  shall be permitted to delay registering any
Registrable  Securities  for the same  period as the delay in  registering  such
other securities.  If an underwritten  offering, any right of the Stockholder to
participate in a registration  pursuant to this Section 9.3 shall be conditioned
upon it agreeing to offer and sell Registrable Securities in accordance with the
plan of  distribution  applicable  to the other  Purchaser  Shares  sought to be
offered and sold in such registration.

                  (b)  EXPENSES.   The  Purchaser  shall  pay  the  Registration
Expenses in connection with any registration  effected  pursuant to this Section
9.3 and the  Stockholder  shall pay the Selling  Expenses in connection with any
registration effected pursuant to this Section 9.3.

                  (c)  SELECTION  OF  UNDERWRITERS   AND  FORM  OF  REGISTRATION
STATEMENT.  In connection  with each public offering  effected  pursuant to this
Section 9.3, the Purchaser shall promptly select the managing  underwriters,  if
any, and the form of  registration  statement to be used in connection  with any
such offering.

                  (d)  PRIORITY  IN  PIGGYBACK  REGISTRATIONS.   Notwithstanding
anything in Section 9.3 above to the contrary,  if the managing  underwriter  of
any  underwritten  public  offering  shall inform the Purchaser by letter of its
belief  that  the  number  or type of  Registrable  Securities  requested  to be
included in such registration  would materially and adversely affect such public
offering, then the Purchaser shall promptly notify the Stockholder of such fact.
If the managing underwriter does not agree to include all (or such lesser amount
as the  Stockholder  shall,  in its  discretion,  agree to) of the number of the
Registrable  Securities initially requested by the Stockholder to be included in
such registration, then the Purchaser shall include in such registration, to the
extent of the number and type which the  Purchaser  is so advised can be sold in
such Public  Offering,  (i) FIRST,  the Purchaser  Shares proposed to be sold by
Purchaser;  (ii)  SECOND,  to the  extent  additional  Purchaser  Shares  may be
included,  the  Purchaser  Shares  proposed  to be  sold by any  members  of the
Chaterjee Group, or any of their respective affiliates or transferees, and (iii)
THIRD,  to  the  extent  additional  Purchaser  Shares  may  be  included,   the
Registrable  Securities sought to be sold by the Stockholder.  In the event that
the  proposed  registration  by Purchaser  is pursuant to a  contractual  demand
registration right, the sale of Purchaser Shares by such party making the demand
or by any member of the Chaterjee Group shall have priority over the sale of the
Registrable Securities.

                                    - 10 -

<PAGE>




            9.4.  SHELF REGISTRATION.

                  (a)  FILING  OF  SHELF  REGISTRATION.  At  such  time  as  the
Purchaser's obligations to register shares set forth in the Prior Agreement have
terminated, or the Purchaser otherwise amends, or obtains a waiver of, the Prior
Agreement which permits the granting of registration  rights upon the request of
the  Stockholder,  which the  Purchaser  hereby  agrees to use its  commercially
reasonable  efforts  to secure on behalf of the  Stockholder,  upon the  written
request of the  Stockholder,  the  Purchaser  shall  cause to be filed under the
Securities Act a  registration  statement on Form S-2 or S-3, as selected by the
Purchaser,  for a shelf  registration  pursuant  to  Rule  415  pursuant  to the
Securities Act (the "SHELF REGISTRATION") relating to all or such portion of the
Registrable Securities so requested by the Stockholder,  and the Purchaser shall
take  reasonable  actions  to  effect,  as soon as  practicable,  subject to the
reasonable  cooperation of the Stockholder,  within 90 days after the request to
file a Shelf  Registration is received from the Stockholder,  such  registration
under the Securities Act, of the Registrable  Securities which the Purchaser has
been so  requested  to  register  by the  Stockholder.  The  obligations  of the
Purchaser to file a registration  statement relating to a Shelf Registration for
Registrable  Securities  may be  exercised on not more than two  occasions.  The
obligations  set forth above in this  subsection (a) shall terminate on the date
which is two years from the Effective Time of the Merger.  The Company shall use
its  best  efforts  to  maintain  its  eligibility  to use  Form  S-2 or S-3 for
secondary offerings.

                  (b) PERIOD OF DELAY.  The Purchaser  shall not be obligated to
effect the filing of a registration  statement  pursuant to this Section 9.4 if,
at the time of any request to register  Registrable  Securities pursuant to this
Section 9.4, the Purchaser is preparing,  or within 30 days thereafter engages a
managing  underwriter and commences to prepare,  a registration  statement for a
primary public offering (other than a registration  effected solely to implement
an employee  benefit  plan) by the  Purchaser (a  "PURCHASER  OFFERING"),  or is
engaged in any material acquisition or divestiture or other business transaction
with a third party which, in the good faith opinion of the board of directors of
the  Purchaser,  would  be  adversely  affected  by the  Shelf  Registration  (a
"MATERIAL  PURCHASER  TRANSACTION"),  in which  event the  Purchaser  may at its
option by  written  notice to the  Stockholder  direct  that the  obligation  to
commence the preparation and filing of such Shelf  Registration be delayed for a
period of 45 days from the date of such request or, if during such 45-day period
the  Purchaser  files a  registration  statement  with  respect  to a  Purchaser
Offering,  then until such date that is 90 days after the effective date of such
registration  statement.  Additionally,  if the  Purchaser  has  filed  and  the
Commission has declared  effective any registration  statement  pursuant to this
Section 9.4, and  thereafter  the Purchaser  commences to prepare,  or engages a
managing  underwriter and commences to prepare,  a registration  statement for a
Purchaser Offering,  or is engaged in any Material Purchaser  Transaction,  then
the Purchaser may at its option by written notice to the Stockholder direct that
no Registrable  Securities be distributed pursuant to the Shelf Registration for
a period  of 45 days  from the date of such  notice  to the  Stockholder  or, if
during such 45-day period,  the Purchaser  files a  registration  statement with
respect  to a  Purchaser  Offering,  90 days  after the  effective  date of such
registration statement.

                  (c)   EXPENSES AND EFFECTIVE PERIOD.  The Purchaser shall pay 
the Registration Expenses in connection with any registration effected  pursuant



                                    - 11 -

<PAGE>



to this  Section  9.4 and the  Stockholder  shall pay the  Selling  Expenses  in
connection  with any  registration  effected  pursuant to this  Section 9.4. The
Purchaser  shall use  reasonable  efforts to maintain the  effectiveness  of any
registration statement relating to the Shelf Registration until the distribution
of the Registrable  Securities  subject thereto,  but in no event beyond 2 years
after the Effective Time of the Merger.

                  (a) LIMITATION ON DISTRIBUTION PURSUANT TO SHELF REGISTRATION.
The Stockholder shall not knowingly  distribute through the Shelf  Registration,
to any one  beneficial  holder,  whether  in one  transaction  or in a series of
related transactions, more than 3.5% of the then outstanding Purchaser Shares.

            9.5.  REGISTRATION PROCEDURES.

                  (a) In connection  with the  registration  of any  Registrable
Securities under the Securities Act as provided in Sections 9.2, 9.3 or 9.4, the
Purchaser shall as promptly as practicable:

                        (i)   prepare and file with the Commission the requisite
registration statement to effect such registration and thereafter use reasonable
efforts to cause such registration statement to become and remain effective;

                        (ii)  use reasonable efforts to  prepare  and  file with
the Commission such amendments and  supplements to such  registration  statement
and the  prospectus  used in  connection  therewith as may be necessary  to keep
such registration statement effective  and  to  comply  with  provisions  of the
Securities Act with respect to  the  disposition of all  Registrable  Securities
covered by such registration statement for the applicable effective period;

                        (iii) furnish  to  the   Stockholder   such   number  of
conformed copies  of such  registration statement and of each such amendment and
supplement thereto (in each case including all  exhibits), such number of copies
of the  prospectus  contained  in such  registration  statement  (including each
preliminary  prospectus  and  any  summary  prospectus) and any other prospectus
filed  under  Rule  424  under  the  Securities  Act,  in  conformity  with  the
requirements of the Securities Act;

                        (iv)  use reasonable efforts to register or  qualify all
Registrable  Securities  and  other  securities  covered  by  such  registration
statement  under  such other  securities  or Blue Sky laws of such States of the
United  States of  America  where  an  exemption  is  not  available  and as the
Stockholder  shall reasonably  request;  PROVIDED, HOWEVER, that  the  Purchaser
shall  not for  any such purpose be required to qualify generally to do business
as a foreign corporation in any  jurisdiction wherein it would  not, but for the
requirements  of  this  paragraph  (iv),  be  obligated to be so qualified or to
consent to general service of process in any such jurisdiction;

                        (v)   notify  the Stockholder when a prospectus relating
thereto is required to be delivered under the Securities Act and, upon discovery
that there has  occurred  any event as a result of which the prospectus included


                                    - 12 -

<PAGE>


in such registration  statement, as then in effect, includes an untrue statement
of a material  fact or omits to state any  material  fact  required to be stated
therein or necessary to make the statements therein not misleading, in the light
of the  circumstances  under  which  they were made,  and at the  request of the
Stockholder  use its  best  efforts  to  promptly  prepare  and  furnish  to the
Stockholder  such number of copies of a  supplement  to or an  amendment of such
prospectus  as  may  be  necessary  so  that,  as  thereafter  delivered  to the
purchasers  of such  securities,  such  prospectus  shall not  include an untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated therein or necessary to make the statements therein not misleading in the
light of the circumstances under which they were made;

                        (vi)  otherwise  use  its  reasonable  efforts to comply
with all  applicable rules and regulations of the Commission, and, except in the
case of a Shelf  Registration,  make  available  to  its  security-holders,   as
soon  as reasonably  practicable, an earnings statement meeting the requirements
of Section 11(a) of the Securities Act, which the Purchaser shall be entitled to
satisfy by complying  with the  requirements of Rule 158 promulgated thereunder,
and promptly furnish a copy of the same to the Stockholder;

                        (vii) provide  and  cause  to  be  maintained a transfer
agent and registrar for all Registrable  Securities covered by such registration
statement  from  and  after  a date not later  than the  effective  date of such
registration statement;

                        (viii) use  reasonable  efforts  to list all Registrable
Securities covered by  such  registration  statement on any national  securities
exchange or over-the-counter market, if any, on which  Registrable Securities of
the  same  class,  and  if  applicable,  series,  covered  by such  registration
statement are then listed; and

                        (ix)  subject to customary  confidentiality obligations,
the  Purchaser  shall  permit  reasonable  access to  the  Stockholder  and  its
counsel and other advisors to its financial  statements  and its other books and
records to permit the Stockholder to perform reasonable due diligence.

                  The Stockholder agrees  that  upon  receipt of any notice from
the  Purchaser  of the  happening  of an event of the kind  described in Section
9.4(v),   the  Stockholder  shall  forthwith   discontinue  its  disposition  of
Registrable  Securities pursuant to the registration  statement relating to such
Registrable  Securities  until the  Stockholder's  receipt  of the copies of the
supplemented or amended prospectus contemplated by Section 9.4(v).

            9.6.  UNDERWRITTEN  OFFERINGS.  If requested by the underwriters for
any underwritten  public offering by the Stockholder  pursuant to a registration
requested  under  Section  9.2  or  9.3,  the  Purchaser  shall  enter  into  an
underwriting  agreement with such  underwriters for such public  offering,  such
agreement to be reasonably  satisfactory in substance and form to the Purchaser,
the Stockholder and the underwriters,  and to contain such  representations  and
warranties  by the  Purchaser  and the  Stockholder  and such other terms as are
generally prevailing in agreements of that type, including,  without limitation,
customary  indemnities  and  contribution  provisions  generally  prevailing  in
agreements of that type. The  Stockholder  shall cooperate with the Purchaser in
the negotiation of the  underwriting  agreement and shall give  consideration to


                                    - 13 -

<PAGE>



the  reasonable  suggestions  of the Purchaser  regarding the form and substance
thereof. The Stockholder shall be a party to such underwriting agreement.

            9.7.  HOLDBACK  AGREEMENTS.  The  Stockholder  agrees that, upon the
request  of and to the  extent  required  by  the  underwriter(s)  managing  any
registration of Purchaser Shares under the Securities Act by the Purchaser or by
any member of the  Chaterjee  Group  (except to the  extent the  Stockholder  is
participating as a selling securityholder  pursuant to this Agreement),  it will
not,  without the prior written consent of such  underwriters,  during the 7-day
period prior to, and during the 90-day  (180-days in the case of a  registration
effected by the Chaterjee Group) period beginning on, the effective date of such
registration,  sell,  make any short sale of,  pledge,  grant any option for the
purchase of or otherwise  dispose of, or enter into any other hedging or similar
transaction with respect to, any Purchaser Shares, or any securities convertible
into or exchangeable  for Purchaser  Shares.  The provisions of this Section 9.7
shall not be cumulative with the provisions of Section 9.4 (b) hereof.

            9.8.  INDEMNIFICATION AND CONTRIBUTION.

                  (a)  INDEMNIFICATION  BY THE  PURCHASER.  In the  event of any
registration  of any  securities of the Purchaser  under the  Securities  Act in
which the Stockholder is a selling shareholder,  the Purchaser shall, and hereby
does,  indemnify and hold harmless,  in the case of any  registration  statement
filed  pursuant  to this  Section  9,  the  Stockholder's  directors,  officers,
partners,  employees,  agents and affiliates  and, to the extent required by any
underwriting  agreement  entered  into by the  Purchaser,  each other person who
participates  as an  underwriter  in the  registration  statement and each other
person who controls the Stockholder or any such  underwriter  within the meaning
of the Securities Act, insofar as losses,  claims,  damages,  or liabilities (or
actions or proceedings,  whether  commenced or threatened,  in respect  thereof)
arise out of or are based upon any untrue  statement or alleged untrue statement
of any fact contained in any registration  statement under which such securities
were  registered  under the Securities Act, any  preliminary  prospectus,  final
prospectus,  or  summary  prospectus  contained  therein,  or any  amendment  or
supplement  thereto, or any omission or alleged omission to state therein a fact
required to be stated  therein or  necessary to make the  statements  therein in
light of the  circumstances  in which  they were  made not  misleading,  and the
Purchaser  shall  reimburse the  Stockholder  and each such  director,  officer,
partner,  employee,  agent  or  affiliate  and,  to the  extent  required  by an
underwriting  agreement  entered  into by the  Purchaser,  any  underwriter  and
controlling  person for any legal or any other expenses  reasonably  incurred by
them in  connection  with  investigating  or  defending  any such  loss,  claim,
liability, action or proceeding described in this clause (a); PROVIDED, HOWEVER,
that the  Purchaser  shall not be liable in any such case to the extent that any
such loss, claim, damage, liability (or action or proceeding in respect thereof)
or expense arises out of or is based upon an untrue  statement or alleged untrue
statement or omission or alleged omission made in such  registration  statement,
any such preliminary prospectus, summary prospectus,  amendment or supplement in
reliance  upon and in  conformity  with  written  information  furnished  to the
Purchaser by or on behalf of the Stockholder specifically stating that it is for
use in the preparation of such registration  statement,  preliminary prospectus,
final prospectus,  summary prospectus,  amendment or supplement.  Such indemnity
shall remain in full force and effect regardless of any investigation made by or


                                    - 14 -

<PAGE>



on behalf of the Stockholder or any such director,  officer,  agent or affiliate
or controlling  person and shall survive the transfer of such  securities by the
Stockholder.

                  (b)  INDEMNIFICATION  BY THE  STOCKHOLDER.  If any Registrable
Securities are included in any  registration  statement,  the Stockholder  shall
indemnify  and hold  harmless  (in the same manner and to the same extent as set
forth in subsection  (a) above) the  Purchaser,  each director of the Purchaser,
each officer of the Purchaser  and each  employee of the  Purchaser  and, to the
extent required by any underwriting  agreement  entered into by the Stockholder,
each  other  person  who  participates  as an  underwriter  in the  registration
statement or sale of such securities and each other person who controls any such
underwriter  within  the  meaning of the  Securities  Act,  with  respect to any
statement  or alleged  statement  in or omission or alleged  omission  from such
registration statement, any preliminary prospectus,  final prospectus or summary
prospectus  contained therein,  or any amendment or supplement  thereto, if such
statement  or alleged  statement  or  omission or alleged  omission  was made in
reliance  upon and in  conformity  with  written  information  furnished  to the
Purchaser by or on behalf of the Stockholder specifically stating that it is for
use in the preparation of such registration  statement,  preliminary prospectus,
final  prospectus,  summary  prospectus,   amendment  or  supplement;  PROVIDED,
HOWEVER,  in no  event  shall  the  liability  of  any  Stockholder  under  this
subsection(b)  exceed the  proceeds  obtained by the sale of such  Stockholder's
Registrable Securities in any such registration.

                  (c) NOTICE OF  CLAIMS,  ETC.  Promptly  after  receipt,  by an
indemnified  party of notice of the  commencement  of any  action or  proceeding
involving a claim  referred to in the  preceding  subsections  (a) and (b), such
indemnified  party shall, if a claim in respect thereof is to be made against an
indemnifying  party,  immediately  give  written  notice  to the  latter  of the
commencement  of  such  action;  PROVIDED,  HOWEVER,  that  the  failure  of any
indemnified  party to give  notice as  provided  herein  shall not  relieve  the
indemnifying  party of its  obligations  under the preceding  paragraphs of this
Section 9.8, except to the extent that the  indemnifying  party is prejudiced by
such  failure.   The  indemnified   party  shall  be  entitled  to  receive  the
indemnification payments described herein after providing such written notice to
the  indemnifying  party.  In  case  any  such  action  is  brought  against  an
indemnified  party, the  indemnifying  party shall be entitled to participate in
and to assume the defense thereof, with counsel reasonably  satisfactory to such
indemnified  party,  and  after  notice  from  the  indemnifying  party  to such
indemnified  party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying  party shall not be liable to such indemnified  party for any legal
or other  expenses  subsequently  incurred by the latter in connection  with the
defense thereof. Each indemnified party shall furnish such information regarding
itself or the claim in question as an indemnifying  party may reasonably request
in writing and as shall be reasonably required in connection with the defense of
such claim and litigation  resulting  therefrom.  No indemnifying party shall be
liable for any  settlement  of any action or  proceeding  effected  without  its
written  consent,  which  shall  not  be  unreasonably   withheld,   delayed  or
conditioned. Consent of the indemnified party shall be required for the entry of
any judgment or to enter into a settlement only when such judgment or settlement
does not include as an unconditional  term thereof the giving by the claimant or
plaintiff to such  indemnified  party of a release from all liability in respect
such claim or litigation.

                  (d)   CONTRIBUTION.  If  the  indemnification  provided for in
this Section 9.8 shall for any reason be held by a court to be unavailable to an


                                    - 15 -

<PAGE>



indemnified  party in respect of any loss,  claim,  damage or liability,  or any
action in respect  thereof,  then,  in lieu of the amount paid or payable  under
Sections 9.8(a) and 9.8(b) hereof,  the indemnified  party and the  indemnifying
party shall contribute to the aggregate losses,  claims, damages and liabilities
(including  legal or other  expenses  reasonably  incurred  in  connection  with
investigating  the same) in such  proportion  as is  appropriate  to reflect the
relative  fault of the  Purchaser on one hand and the  Stockholder  on the other
that resulted in such loss,  claim,  damage or  liability,  or action in respect
thereof,  as well as any  other  relevant  equitable  considerations  or, if the
allocation provided above is not permitted by applicable law, in such proportion
as shall be  appropriate  to  reflect  the  relative  benefits  received  by the
Purchaser  on one hand and the  Stockholder  on the other.  No Person  guilty of
fraudulent misrepresentation (within the meaning of the Securities Act) shall be
entitled to  contribution  from any Person who was not guilty of such fraudulent
misrepresentation.  In addition,  no Person  shall be  obligated  to  contribute
hereunder  any  amounts in payment  for any  settlement  of any action or claim,
effected  without such  Person's  written  consent,  which  consent shall not be
unreasonably withheld; PROVIDED, HOWEVER, in no event shall the liability of any
Stockholder  under this subsection  exceed the proceeds  obtained by the sale of
such Stockholder's Registrable Securities in any such registration.

10. SURVIVAL   OF   REPRESENTATIONS   AND   WARRANTIES.    All  representations,
warranties, covenants and agreements made  by Stockholder  or Purchaser  in this
Agreement shall survive the Closing hereunder and  any investigation at any time
made by or on behalf of any party.

11. NOTICES. All notices or other communications required or permitted hereunder
shall be in writing (except as otherwise  provided herein),  given in the manner
provided in the Merger Agreement,  and shall be deemed duly given when received,
addressed as follows:

                              If to Purchaser:

                              Primus Telecommunications Group, Inc.
                              2070 Chain Bridge Road
                              Vienna, VA 22102
                              Attention: K. Paul Singh, Chairman and CEO
                              Facsimile: (703) 902-2814

                              With a copy to:

                              Pepper Hamilton LLP
                              3000 Two Logan Square
                              Philadelphia, PA  19103-2799
                              Attention: James D. Epstein, Esq.
                              Facsimile:  (215) 981-4750
                          

                                    - 16 -

<PAGE>


                              If to Stockholder:

                              Warburg, Pincus Investors, L.P.
                              E.M. Warburg, Pincus & Co., LLC
                              466 Lexington Avenue, 10th Floor
                              New York, New York 10017
                              Attention:  Doug Karp
                              Facsimile:  (212) 878-6162

                              With a copy to:

                              Wilkie Farr & Gallagher
                              One Citicorp Center
                              153 East 53rd Street
                              New York, New York 10022-4677
                              Attention:  Jack H. Nusbaum, Esq.
                              Facsimile:  (212) 821-8111


12. ENTIRE  AGREEMENT;  AMENDMENT.  This Agreement,  together with the documents
expressly referred to herein,  constitute the entire agreement among the parties
hereto with respect to the subject  matter  contained  herein and  supersede all
prior  agreements  and  understandings  among the parties  with  respect to such
subject  matter.  This  Agreement  may  not be  modified,  amended,  altered  or
supplemented  except by an  agreement  in  writing  executed  by  Purchaser  and
Stockholder.

13. ASSIGNS.  This Agreement  shall be binding upon and inure  to the benefit of
the  parties  hereto  and their  respective  successors,  assigns  and  personal
representatives,  but neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto without the
prior written consent of the other parties.

14. GOVERNING LAW. Except as expressly set forth below,  this Agreement shall be
governed by and construed in  accordance  with the laws of the State of Florida,
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of laws thereof. In addition, each of the Stockholder and Purchaser
hereby agree that any dispute  arising out of this  Agreement  shall be heard in
the  appropriate  court of the State of Florida or in the United States District
Court for the Southern  District of Florida and, in connection  therewith,  each
party to this Agreement  hereby consents to the  jurisdiction of such courts and
agrees that any service of process in connection with any dispute arising out of
this Agreement may be given to any other party hereto by certified mail,  return
receipt requested, at the respective addresses set forth in Section 10 above.

15. INJUNCTIVE  RELIEF.  The parties agree that in the event  of a breach of any
provision  of this  Agreement,  the  aggrieved  party may be without an adequate
remedy at law. The parties  therefore agree that in the event of a breach of any
provision of this Agreement,  the aggrieved party shall be entitled to obtain in
any court of  competent  jurisdiction  a decree of  specific  performance  or to
enjoin  the  continuing  breach  of such  provision,  in each case  without  the
requirement  that a bond be posted,  as well as to obtain  damages for breach of



                                    - 17 -

<PAGE>



this  Agreement.  By seeking or obtaining such relief,  the aggrieved party will
not be precluded  from seeking or obtaining  any other relief to which it may be
entitled.

16. COUNTERPARTS;  FACSIMILE   SIGNATURES.  This   Agreement  may  be  executed,
including  execution by  facsimile, in any number of counterparts, each of which
shall be deemed to be an original and all of which together shall constitute one
and the same document.

17. SEVERABILITY.  Any term or provision of this  Agreement  which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the  remaining  terms and  provisions  of this  Agreement  or
affecting  the validity or  enforceability  of any of the terms or provisions of
this Agreement in any other jurisdiction.  If any provision of this Agreement is
so broad as to be unenforceable,  such provision shall be interpreted to be only
so broad as is enforceable.

18. FURTHER ASSURANCES.  Each    party  hereto  shall  execute  and deliver such
additional  documents  as  may  be  necessary  or  desirable  to  consummate the
transactions contemplated by this Agreement.

19. THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, expressed or implied,
shall be construed to give any person other than the parties hereto any legal or
equitable  right,  remedy or claim under or by reason of this  Agreement  or any
provision contained herein.


                                    - 18 -

<PAGE>


            IN WITNESS  WHEREOF,  the Purchaser and the Stockholder  have caused
this  Agreement  to be  executed  by their  duly  authorized  officers,  and the
Executive has duly executed this  Agreement,  each as of the date and year first
above written.


                                   Primus Telecommunications Group, Inc.



                                   By:     /S/ K. PAUL SINGH
                                           -------------------------------------
                                   Name:   K. Paul Singh
                                   Title:  President and Chief Executive Officer


                                   Taurus Acquisition Corporation



                                   By:      /S/ K. PAUL SINGH
                                            ------------------------------------
                                   Name:    K. Paul Singh
                                   Title:   President


                                   Warburg, Pincus, Investors, L.P.



                                   By:  Warburg, Pincus & Co., general partner

                                   By:      /S/ DOUGLAS M. KARP
                                            ------------------------------------
                                   Name:    Douglas M. Karp
                                   Title:   General Partner

                                   As to Section 8.7 only:



                                            /S/ K. PAUL SINGH
                                   ---------------------------------------------
                                            K. Paul Singh



                                     - 19 -




                               VOTING AGREEMENT

            AGREEMENT  dated as of  February  3, 1998 by and  among  the  person
identified as a Shareholder of PRIMUS TELECOMMUNICATIONS GROUP, INC., a Delaware
corporation (the "COMPANY"), on the signature page below (the "SHAREHOLDER") and
TRESCOM INTERNATIONAL, INC., a Florida corporation (the "TARGET").

             WHEREAS,  the  Shareholder  owns, as of the date hereof,  4,101,731
shares of Common  Stock  (the  "EXISTING  SHARES",  together  with any shares of
common  stock,  par value $.01 per share,  of the Company (the "COMMON  STOCK"),
acquired after the date hereof and prior to the  termination  hereof  (including
shares of Common  Stock  acquired  pursuant to the  exercise  of employee  stock
options  issued  by  the  Company  (the  "OPTIONS")),  hereinafter  collectively
referred to as the "SHARES");

            WHEREAS,  concurrently herewith, the Company and Target are entering
into an Agreement and Plan of Merger (the "MERGER  AGREEMENT") for the merger of
a subsidiary of the Company with and into the Target (the "MERGER");

            WHEREAS,  as a  condition  to their  willingness  to enter  into the
Merger   Agreement,   and  in  reliance  upon   Shareholder's   representations,
warranties,  covenants and agreements  hereunder,  the Target has requested that
the  Shareholder  agree,  and the  Shareholder  has  agreed,  to enter into this
Agreement;

            WHEREAS,  to induce the  Target to enter into the Merger  Agreement,
the Shareholder is willing to execute and deliver this Agreement.

            NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and
agreements herein contained and for such other good and valuable  consideration,
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, it is agreed as follows:

1. AGREEMENT TO VOTE. The Shareholder  hereby agrees that,  during the time this
Agreement  is in effect,  at any  meeting of the  stockholders  of the  Company,
however called, and in any action by consent of the stockholders of the Company,
the Shareholder  shall: (a) vote the Shares in favor of the Merger; (b) vote the
Shares  against  any action or  agreement  that would  result in a breach of any
covenant, representation or warranty or any other obligation or agreement of the
Company under the Merger  Agreement;  (c) vote the Shares  against any action or
agreement  that would  impede,  interfere  with,  delay,  postpone or attempt to
discourage  the Merger  including,  but not  limited  to, (i) any  extraordinary
corporate  transaction (other than the Merger), such as a merger, other business
combination, reorganization or liquidation involving the Company, (ii) a sale or
transfer  of a  material  amount  of  assets  of  the  Company  or  any  of  its
Subsidiaries,  (iii) any change in the  management  or board of directors of the
Company,  except as  otherwise  agreed to in  writing  by the  Target,  (iv) any
material change in the present  capitalization of the Company,  or (v) any other
material  change  in the corporate structure or business of the Company; and (d)


<PAGE>


without  limiting the foregoing,  consult with the Target prior to any such vote
and vote such  Shares in such  manner as is  determined  by the  Target to be in
compliance with the provisions of this Section 1. The  Shareholder  acknowledges
receipt and review of a copy of the Merger  Agreement.  In furtherance  thereof,
the  Shareholder  hereby grants to the Target an  irrevocable  proxy to vote the
Shares in accordance with the terms and conditions of this  Agreement,  it being
understood that such proxy is coupled with an interest.

2.    REPRESENTATIONS  AND  WARRANTIES  OF  THE  SHAREHOLDER.  The   Shareholder
represents and warrants to the Target as follows:

      2.1.  OWNERSHIP OF SHARES.  On the date hereof the Existing Shares are all
of the  Shares  currently  beneficially  owned  (which,  for  purposes  of  this
Agreement shall be determined in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"); PROVIDED, that beneficial
ownership  shall be determined  solely with  reference to Shares over which such
person has voting power as described in  subsection  (a)(1) of such Rule) by the
Shareholder  or any  Affiliate  (as  defined  in the  Merger  Agreement)  of the
Shareholder.  On the  Closing  Date (as  defined in the Merger  Agreement),  the
Shares will  constitute all of the shares of Common Stock owned  beneficially by
the Shareholder or any Affiliate of the  Shareholder.  The Shareholder  does not
have  any  rights  to  acquire  any  additional  shares  of  Common  Stock.  The
Shareholder  currently has with respect to the Existing  Shares,  and at Closing
will have with respect to the Shares, good, valid and marketable title, free and
clear of all liens,  encumbrances,  restrictions,  options,  warrants, rights to
purchase,  voting  agreements or voting trusts,  and claims of every kind (other
than the encumbrances  created by this Agreement and other than  restrictions on
transfer under applicable Federal and State securities laws).

      2.2. POWER;  BINDING AGREEMENT.  The Shareholder has the full legal right,
power  and  authority  to  enter  into  and  perform  all of  the  Shareholder's
obligations  under this Agreement.  The execution and delivery of this Agreement
by the Shareholder will not violate any other agreement to which the Shareholder
is a party including,  without limitation,  any voting agreement,  stockholder's
agreement or voting trust.  This  Agreement has been duly executed and delivered
by the Shareholder and constitutes a legal,  valid and binding  agreement of the
Shareholder,  enforceable in accordance with its terms. Neither the execution or
delivery of this  Agreement,  nor the  consummation  by the  Shareholder  of the
transactions contemplated hereby, will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment, agreement,  understanding,  arrangement or other restriction of  any
kind to which the Shareholder is a party or by which the Shareholder is bound.

      2.3.  FINDER'S FEES.  No person is, or will be, entitled to any commission
 or finder's fees from the Shareholder in connection with this Agreement or  the
transactions contemplated hereby, exclusive of  any  commission or finder's fees
referred to in the Merger Agreement.


                                    -2-


<PAGE>



3.    REPRESENTATIONS AND WARRANTIES OF THE TARGET.  The Target  represents  and
warrants to the Shareholder as follows:

      3.1.  AUTHORITY.  The Target has full legal right,  power and authority to
enter  into  and  perform  all of its  obligations  under  this  Agreement.  The
execution  and  delivery  of this  Agreement  by the Target will not violate any
other  agreement to which the Target is a party.  This  Agreement  has been duly
executed and delivered by the Target and constitutes a legal,  valid and binding
agreement of the Target,  enforceable in accordance with its terms.  Neither the
execution  of  this  Agreement  nor  the  consummation  by  the  Target  of  the
transactions  contemplated hereby will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment,  agreement,  understanding,  arrangement or other restriction of any
kind to which the Target is a party or by which it is bound.

      3.2.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or  finder's  fee  from  the  Target  in  connection  with this Agreement or the
transactions contemplated  hereby,  exclusive of any commission or finder's fees
referred to in the Merger Agreement.

4.  TERMINATION.  This Agreement (other than the provisions of Sections 5 and 6,
which shall survive any  termination of this  Agreement)  shall terminate on the
earliest of (a) the Effective Time (as defined in the Merger Agreement), (b) the
date immediately following the termination of the Merger Agreement in accordance
with its terms, and (c) October 31, 1998.

5.    EXPENSES.  Except as  provided  in  Section 18, each party hereto will pay
all of its expenses in  connection  with  the  transactions contemplated by this
Agreement, including,  without  limitation, the fees and expenses of its counsel
and other advisers.

6. CONFIDENTIALITY.  The Shareholder recognizes that successful  consummation of
the   transactions   contemplated  by  this  Agreement  may  be  dependent  upon
confidentiality  with  respect to these  matters.  In this  connection,  pending
public  disclosure,  the Shareholder agrees that it will not disclose or discuss
these matters with anyone  (other than  officers,  directors,  legal counsel and
advisors  of the  Shareholder,  the Target or the  Company)  not a party to this
Agreement,  without  prior  written  consent of the  Target,  except for filings
required pursuant to the Exchange Act, and the rules and regulations thereunder,
or  disclosures  which the  Shareholder's  legal counsel  advises in writing are
necessary in order to fulfill the Shareholder's  obligations  imposed by law, in
which event the Shareholder shall give prompt prior notice of such disclosure to
the Target.

7.    CERTAIN COVENANTS OF THE SHAREHOLDER.

      7.1.  Except in  accordance  with the  provisions of this  Agreement,  the
Shareholder  agrees,  prior to the  termination of this Agreement as provided in
Section 4 above, not to, directly or indirectly:


                                    -3-


<PAGE>


            (a) sell, transfer,  pledge,  encumber,  assign or otherwise dispose
of, or enter into any contract,  option or other  arrangement  or  understanding
with respect to the sale,  transfer,  pledge,  encumbrance,  assignment or other
disposition of, any of the Shares; or

            (b) grant any  proxies,  deposit any Shares  into a voting  trust or
enter into a voting agreement with respect to any Shares.

      7.2. The Shareholder agrees,  while this Agreement is in effect, to notify
the Target  promptly of the number of any shares of Common Stock acquired by the
Shareholder after the date hereof.

8.    SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  All representations,
warranties,  covenants  and  agreements made by the Shareholder or the Target in
this Agreement shall survive regardless of any investigation at any time made by
or on behalf of any party.

9. NOTICES. All notices or other communications  required or permitted hereunder
shall be in writing (except as otherwise  provided herein),  given in the manner
provided in the Merger Agreement,  and shall be deemed duly given when received,
addressed as follows:

                              If to the Target:

                              TresCom International, Inc.
                              200 East Broward Blvd.
                              Ft. Lauderdale, FL 33301
                              Attention:  Wesley T. O'Brien, Chairman and CEO
                              Facsimile:  (954) 463-4353

                              With a copy to:

                              Kelley Drye & Warren LLP
                              Two Stamford Plaza
                              281 Tresser Boulevard
                              Stamford, Connecticut  06901-3229
                              Fax:  (203) 351-8115
                              Attention:  John T. Capetta, Esquire

                              If to the Shareholder:

                              Mr. K. Paul Singh
                              c/o Primus Telecommunications Group, Inc.
                              2070 Chain Bridge Road
                              Vienna, VA 22102
                              Facsimile:  (703) 902-2870



                                    -4-


<PAGE>


                              With a copy to:

                              Pepper Hamilton LLP
                              3000 Two Logan Square
                              Philadelphia, PA  19103-2799
                              Attention: James D. Epstein, Esquire
                              Facsimile: (215) 981-4750

10. ENTIRE  AGREEMENT;  AMENDMENT.  This Agreement,  together with the documents
expressly referred to herein,  constitute the entire agreement among the parties
hereto with respect to the subject  matter  contained  herein and  supersede all
prior  agreements  and  understandings  among the parties  with  respect to such
subject  matter.  This  Agreement  may  not be  modified,  amended,  altered  or
supplemented  except by an  agreement in writing  executed by the party  against
whom such  modification,  amendment,  alteration  or  supplement is sought to be
enforced.

11.  ASSIGNS.  This Agreement  shall be binding upon and inure to the benefit of
the  parties  hereto  and their  respective  successors,  assigns  and  personal
representatives,  but neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto without the
prior written consent of the other parties.

12. GOVERNING LAW. Except as expressly set forth below,  this Agreement shall be
governed by and construed in  accordance  with the laws of the State of Florida,
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of laws  thereof.  In addition,  each of the  Shareholders  and the
Target hereby agree that any dispute arising out of this Agreement or the Merger
shall be heard in the  primary  trial  court of the State of  Florida  or in the
United  States  District  Court for the  Southern  District  of Florida  and, in
connection  therewith,  each  party to this  Agreement  hereby  consents  to the
jurisdiction of such courts and agrees that any service of process in connection
with any dispute arising out of this Agreement or the Merger may be given to any
other  party  hereto  by  certified  mail,  return  receipt  requested,  at  the
respective addresses set forth in Section 9 above.

13.  INJUNCTIVE  RELIEF.  The parties agree that in the event of a breach of any
provision  of this  Agreement,  the  aggrieved  party may be without an adequate
remedy at law. The parties  therefore agree that in the event of a breach of any
provision of this Agreement,  the aggrieved party shall be entitled to obtain in
any court of  competent  jurisdiction  a decree of  specific  performance  or to
enjoin  the  continuing  breach  of such  provision,  in each case  without  the
requirement  that a bond be posted,  as well as to obtain  damages for breach of
this  Agreement.  By seeking or obtaining such relief,  the aggrieved party will
not be precluded  from seeking or obtaining  any other relief to which it may be
entitled.

14.   COUNTERPARTS;  FACSIMILE  SIGNATURES.  This  Agreement  may  be  executed,
including execution  by  facsimile, in any number of counterparts, each of which
shall be deemed to be an original and all of which together shall constitute one
and the same document.


                                    -5-


<PAGE>




15.  SEVERABILITY.  Any term or provision of this Agreement  which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the  remaining  terms and  provisions  of this  Agreement  or
affecting  the validity or  enforceability  of any of the terms or provisions of
this Agreement in any other jurisdiction.  If any provision of this Agreement is
so broad as to be unenforceable,  such provision shall be interpreted to be only
so broad as is enforceable.

16.   FURTHER  ASSURANCES.  Each  party  hereto  shall  execute and deliver such
additional  documents  as  may  be  necessary  or  desirable  to  consummate the
transactions contemplated by this Agreement.

17. THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, expressed or implied,
shall be construed to give any person other than the parties hereto any legal or
equitable  right,  remedy or claim under or by reason of this  Agreement  or any
provision contained herein.

18. LEGAL EXPENSES.  In the event any legal proceeding is commenced by any party
to this Agreement to enforce or recover damages for any breach of the provisions
hereof,  the  prevailing  party in such legal  proceeding  shall be  entitled to
recover in such legal  proceeding from the losing party such prevailing  party's
costs and expenses incurred in connection with such legal proceedings, including
reasonable attorneys fees.

19.   AMENDMENT AND MODIFICATION.  This Agreement  may  be amended, modified and
supplemented by a written document executed by the Target and the Shareholder.


                                    -6-


<PAGE>


            IN WITNESS  WHEREOF,  the Target has  caused  this  Agreement  to be
executed  by its  duly  authorized  officers,  and the  Shareholders  have  duly
executed this Agreement, each as of the date and year first above written.


                              COMPANY:

                              TRESCOM INTERNATIONAL COMMUNICATIONS, INC.


                              By:   /S/ WESLEY O'BRIEN
                                 ---------------------------------------
                                    Wes O'Brien, Chief Executive Officer

                              SHAREHOLDER:



                                         /S/ K. PAUL SINGH
                               -----------------------------------------
                                           K. Paul Singh


                                    -7-





                               VOTING AGREEMENT

            AGREEMENT  dated as of  February  3, 1998 by and  among  the  person
identified as a Shareholder of PRIMUS TELECOMMUNICATIONS GROUP, INC., a Delaware
corporation (the "COMPANY"), on the signature page below (the "SHAREHOLDER") and
TRESCOM INTERNATIONAL, INC., a Florida corporation (the "TARGET").

             WHEREAS,  the  Shareholder  owns,  as of the date  hereof,  320,035
shares of Common  Stock  (the  "EXISTING  SHARES",  together  with any shares of
common  stock,  par value $.01 per share,  of the Company (the "COMMON  STOCK"),
acquired after the date hereof and prior to the  termination  hereof  (including
shares of Common  Stock  acquired  pursuant to the  exercise  of employee  stock
options  issued  by  the  Company  (the  "OPTIONS")),  hereinafter  collectively
referred to as the "SHARES");

            WHEREAS,  concurrently herewith, the Company and Target are entering
into an Agreement and Plan of Merger (the "MERGER  AGREEMENT") for the merger of
a subsidiary of the Company with and into the Target (the "MERGER");

            WHEREAS,  as a  condition  to their  willingness  to enter  into the
Merger   Agreement,   and  in  reliance  upon   Shareholder's   representations,
warranties,  covenants and agreements  hereunder,  the Target has requested that
the  Shareholder  agree,  and the  Shareholder  has  agreed,  to enter into this
Agreement;

            WHEREAS,  to induce the  Target to enter into the Merger  Agreement,
the Shareholder is willing to execute and deliver this Agreement.

            NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and
agreements herein contained and for such other good and valuable  consideration,
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, it is agreed as follows:

1. AGREEMENT TO VOTE. The Shareholder  hereby agrees that,  during the time this
Agreement  is in effect,  at any  meeting of the  stockholders  of the  Company,
however called, and in any action by consent of the stockholders of the Company,
the Shareholder  shall: (a) vote the Shares in favor of the Merger; (b) vote the
Shares  against  any action or  agreement  that would  result in a breach of any
covenant, representation or warranty or any other obligation or agreement of the
Company under the Merger  Agreement;  (c) vote the Shares  against any action or
agreement  that would  impede,  interfere  with,  delay,  postpone or attempt to
discourage  the Merger  including,  but not  limited  to, (i) any  extraordinary
corporate  transaction (other than the Merger), such as a merger, other business
combination, reorganization or liquidation involving the Company, (ii) a sale or
transfer  of a  material  amount  of  assets  of  the  Company  or  any  of  its
Subsidiaries,  (iii) any change in the  management  or board of directors of the
Company,  except as  otherwise  agreed to in  writing  by the  Target,  (iv) any
material change in the present  capitalization of the Company,  or (v) any other
material change in the corporate structure or business of the Company; and (d)


<PAGE>



without  limiting the foregoing,  consult with the Target prior to any such vote
and vote such  Shares in such  manner as is  determined  by the  Target to be in
compliance with the provisions of this Section 1. The  Shareholder  acknowledges
receipt and review of a copy of the Merger  Agreement.  In furtherance  thereof,
the  Shareholder  hereby grants to the Target an  irrevocable  proxy to vote the
Shares in accordance with the terms and conditions of this  Agreement,  it being
understood that such proxy is coupled with an interest.

2.    REPRESENTATIONS  AND  WARRANTIES  OF  THE  SHAREHOLDER.  The   Shareholder
represents and warrants to the Target as follows:

      2.1.  OWNERSHIP OF SHARES.  On the date hereof the Existing Shares are all
of the  Shares  currently  beneficially  owned  (which,  for  purposes  of  this
Agreement shall be determined in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"); PROVIDED, that beneficial
ownership  shall be determined  solely with  reference to Shares over which such
person has voting power as described in  subsection  (a)(1) of such Rule) by the
Shareholder  or any  Affiliate  (as  defined  in the  Merger  Agreement)  of the
Shareholder.  On the  Closing  Date (as  defined in the Merger  Agreement),  the
Shares will  constitute all of the shares of Common Stock owned  beneficially by
the Shareholder or any Affiliate of the  Shareholder.  The Shareholder  does not
have  any  rights  to  acquire  any  additional  shares  of  Common  Stock.  The
Shareholder  currently has with respect to the Existing  Shares,  and at Closing
will have with respect to the Shares, good, valid and marketable title, free and
clear of all liens,  encumbrances,  restrictions,  options,  warrants, rights to
purchase,  voting  agreements or voting trusts,  and claims of every kind (other
than the encumbrances  created by this Agreement and other than  restrictions on
transfer under applicable Federal and State securities laws).

      2.2. POWER;  BINDING AGREEMENT.  The Shareholder has the full legal right,
power  and  authority  to  enter  into  and  perform  all of  the  Shareholder's
obligations  under this Agreement.  The execution and delivery of this Agreement
by the Shareholder will not violate any other agreement to which the Shareholder
is a party including,  without limitation,  any voting agreement,  stockholder's
agreement or voting trust.  This  Agreement has been duly executed and delivered
by the Shareholder and constitutes a legal,  valid and binding  agreement of the
Shareholder,  enforceable in accordance with its terms. Neither the execution or
delivery of this  Agreement,  nor the  consummation  by the  Shareholder  of the
transactions contemplated hereby, will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment, agreement,  understanding,  arrangement or other restriction of  any
kind to which the Shareholder is a party or by which the Shareholder is bound.

      2.3.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or finder's fees from the Shareholder in connection with this  Agreement  or the
transactions contemplated hereby, exclusive of any  commission or  finder's fees
referred to in the Merger Agreement.



                                    -2-


<PAGE>



3.    REPRESENTATIONS AND WARRANTIES OF THE TARGET.  The  Target  represents and
warrants to the Shareholder as follows:

      3.1.  AUTHORITY.  The Target has full legal right,  power and authority to
enter  into  and  perform  all of its  obligations  under  this  Agreement.  The
execution  and  delivery  of this  Agreement  by the Target will not violate any
other  agreement to which the Target is a party.  This  Agreement  has been duly
executed and delivered by the Target and constitutes a legal,  valid and binding
agreement of the Target,  enforceable in accordance with its terms.  Neither the
execution  of  this  Agreement  nor  the  consummation  by  the  Target  of  the
transactions  contemplated hereby will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment,  agreement,  understanding,  arrangement or other restriction of any
kind to which the Target is a party or by which it is bound.

      3.2.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or  finder's  fee  from  the Target  in  connection  with  this Agreement or the
transactions contemplated hereby, exclusive of  any  commission or finder's fees
referred to in the Merger Agreement.

4.  TERMINATION.  This Agreement (other than the provisions of Sections 5 and 6,
which shall survive any  termination of this  Agreement)  shall terminate on the
earliest of (a) the Effective Time (as defined in the Merger Agreement), (b) the
date immediately following the termination of the Merger Agreement in accordance
with its terms, and (c) October 31, 1998.

5.    EXPENSES.  Except as provided in Section 18,  each  party  hereto will pay
all of its expenses in connection  with  the  transactions  contemplated by this
Agreement, including, without  limitation,  the fees and expenses of its counsel
and other advisers.

6. CONFIDENTIALITY.  The Shareholder recognizes that successful  consummation of
the   transactions   contemplated  by  this  Agreement  may  be  dependent  upon
confidentiality  with  respect to these  matters.  In this  connection,  pending
public  disclosure,  the Shareholder agrees that it will not disclose or discuss
these matters with anyone  (other than  officers,  directors,  legal counsel and
advisors  of the  Shareholder,  the Target or the  Company)  not a party to this
Agreement,  without  prior  written  consent of the  Target,  except for filings
required pursuant to the Exchange Act, and the rules and regulations thereunder,
or  disclosures  which the  Shareholder's  legal counsel  advises in writing are
necessary in order to fulfill the Shareholder's  obligations  imposed by law, in
which event the Shareholder shall give prompt prior notice of such disclosure to
the Target.

7.    CERTAIN COVENANTS OF THE SHAREHOLDER.

      7.1.  Except in  accordance  with the  provisions of this  Agreement,  the
Shareholder  agrees,  prior to the  termination of this Agreement as provided in
Section 4 above, not to, directly or indirectly:


                                    -3-


<PAGE>


            (a) sell, transfer,  pledge,  encumber,  assign or otherwise dispose
of, or enter into any contract,  option or other  arrangement  or  understanding
with respect to the sale,  transfer,  pledge,  encumbrance,  assignment or other
disposition of, any of the Shares; or

            (b) grant any  proxies,  deposit any Shares  into a voting  trust or
enter into a voting agreement with respect to any Shares.

      7.2. The Shareholder agrees,  while this Agreement is in effect, to notify
the Target  promptly of the number of any shares of Common Stock acquired by the
Shareholder after the date hereof.

8.    SURVIVAL  OF   REPRESENTATIONS   AND  WARRANTIES.   All   representations,
warranties, covenants  and  agreements made  by the Shareholder or the Target in
this Agreement shall survive regardless of any investigation at any time made by
or on behalf of any party.

9. NOTICES. All notices or other communications  required or permitted hereunder
shall be in writing (except as otherwise  provided herein),  given in the manner
provided in the Merger Agreement,  and shall be deemed duly given when received,
addressed as follows:

                              If to the Target:

                              TresCom International, Inc.
                              200 East Broward Blvd.
                              Ft. Lauderdale, FL 33301
                              Attention:  Wesley T. O'Brien, Chairman and CEO
                              Facsimile:  (954) 463-4353

                              With a copy to:

                              Kelley Drye & Warren LLP
                              Two Stamford Plaza
                              281 Tresser Boulevard
                              Stamford, Connecticut  06901-3229
                              Fax:  (203) 351-8115
                              Attention:  John T. Capetta, Esquire

                              If to the Shareholder:

                              Mr. John DePodesta
                              c/o Primus Telecommunications Group, Inc.
                              2070 Chain Bridge Road
                              Vienna, VA 22102
                              Facsimile:  (703) 902-2870



                                    -4-


<PAGE>



                              With a copy to:

                              Pepper Hamilton LLP
                              3000 Two Logan Square
                              Philadelphia, PA  19103-2799
                              Attention: James D. Epstein, Esquire
                              Facsimile: (215) 981-4750

10. ENTIRE  AGREEMENT;  AMENDMENT.  This Agreement,  together with the documents
expressly referred to herein,  constitute the entire agreement among the parties
hereto with respect to the subject  matter  contained  herein and  supersede all
prior  agreements  and  understandings  among the parties  with  respect to such
subject  matter.  This  Agreement  may  not be  modified,  amended,  altered  or
supplemented  except by an  agreement in writing  executed by the party  against
whom such  modification,  amendment,  alteration  or  supplement is sought to be
enforced.

11.  ASSIGNS.  This Agreement  shall be binding upon and inure to the benefit of
the  parties  hereto  and their  respective  successors,  assigns  and  personal
representatives,  but neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto without the
prior written consent of the other parties.

12. GOVERNING LAW. Except as expressly set forth below,  this Agreement shall be
governed by and construed in  accordance  with the laws of the State of Florida,
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of laws  thereof.  In addition,  each of the  Shareholders  and the
Target hereby agree that any dispute arising out of this Agreement or the Merger
shall be heard in the  primary  trial  court of the State of  Florida  or in the
United  States  District  Court for the  Southern  District  of Florida  and, in
connection  therewith,  each  party to this  Agreement  hereby  consents  to the
jurisdiction of such courts and agrees that any service of process in connection
with any dispute arising out of this Agreement or the Merger may be given to any
other  party  hereto  by  certified  mail,  return  receipt  requested,  at  the
respective addresses set forth in Section 9 above.

13.  INJUNCTIVE  RELIEF.  The parties agree that in the event of a breach of any
provision  of this  Agreement,  the  aggrieved  party may be without an adequate
remedy at law. The parties  therefore agree that in the event of a breach of any
provision of this Agreement,  the aggrieved party shall be entitled to obtain in
any court of  competent  jurisdiction  a decree of  specific  performance  or to
enjoin  the  continuing  breach  of such  provision,  in each case  without  the
requirement  that a bond be posted,  as well as to obtain  damages for breach of
this  Agreement.  By seeking or obtaining such relief,  the aggrieved party will
not be precluded  from seeking or obtaining  any other relief to which it may be
entitled.

14.   COUNTERPARTS;  FACSIMILE  SIGNATURES.  This  Agreement  may  be  executed,
including execution  by  facsimile, in any number of counterparts, each of which
shall be deemed to be an original and all of which together shall constitute one
and the same document.


                                    -5-


<PAGE>



15.  SEVERABILITY.  Any term or provision of this Agreement  which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the  remaining  terms and  provisions  of this  Agreement  or
affecting  the validity or  enforceability  of any of the terms or provisions of
this Agreement in any other jurisdiction.  If any provision of this Agreement is
so broad as to be unenforceable,  such provision shall be interpreted to be only
so broad as is enforceable.

16.   FURTHER  ASSURANCES.  Each  party  hereto  shall  execute and deliver such
additional  documents  as  may  be  necessary  or  desirable  to  consummate the
transactions contemplated by this Agreement.

17. THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, expressed or implied,
shall be construed to give any person other than the parties hereto any legal or
equitable  right,  remedy or claim under or by reason of this  Agreement  or any
provision contained herein.

18. LEGAL EXPENSES.  In the event any legal proceeding is commenced by any party
to this Agreement to enforce or recover damages for any breach of the provisions
hereof,  the  prevailing  party in such legal  proceeding  shall be  entitled to
recover in such legal  proceeding from the losing party such prevailing  party's
costs and expenses incurred in connection with such legal proceedings, including
reasonable attorneys fees.

19.   AMENDMENT AND MODIFICATION.  This Agreement may be amended, modified and
supplemented by a written document executed by the Target and the Shareholder.


                                    -6-


<PAGE>


IN WITNESS  WHEREOF,  the Target has caused this Agreement to be executed by its
duly  authorized  officers,   and   the  Shareholders  have duly executed   this
Agreement, each as of the date and year first above written.


                              COMPANY:

                              TRESCOM INTERNATIONAL COMMUNICATIONS


                              By:   /S/ WESLEY O'BRIEN
                                 ---------------------------------------   
                                    Wes O'Brien, Chief Executive Officer

                              SHAREHOLDER:



                              /S/ JOHN F. DEPODESTA
                              ------------------------------------------
                                    John F. DePodesta


                                    -7-





                               VOTING AGREEMENT

            AGREEMENT  dated as of  February  3, 1998 by and  among  the  person
identified  as  a  Shareholder  of  TRESCOM   INTERNATIONAL,   INC.,  a  Florida
corporation (the "COMPANY"), on the signature page below (the "SHAREHOLDER") and
PRIMUS TELECOMMUNICATIONS GROUP, INC., a Delaware corporation (the "PURCHASER").

             WHEREAS, the Shareholder owns, as of the date hereof, 30,595 shares
of Common  Stock  (the  "EXISTING  SHARES",  together  with any shares of common
stock, par value $.0419 per share, of the Company (the "COMMON STOCK"), acquired
after the date hereof and prior to the termination  hereof  (including shares of
Common Stock acquired  pursuant to the exercise of employee stock options issued
by the Company (the  "OPTIONS")),  hereinafter  collectively  referred to as the
"SHARES");

            WHEREAS,  concurrently  herewith,  the  Company  and  Purchaser  are
entering into an Agreement and Plan of Merger (the "MERGER  AGREEMENT")  for the
merger of a subsidiary of the Company with and into the Company (the "MERGER");

            WHEREAS,  as a  condition  to their  willingness  to enter  into the
Merger   Agreement,   and  in  reliance  upon   Shareholder's   representations,
warranties, covenants and agreements hereunder, the Purchaser has requested that
the  Shareholder  agree,  and the  Shareholder  has  agreed,  to enter into this
Agreement;

            WHEREAS, to induce the Purchaser to enter into the Merger Agreement,
the Shareholder is willing to execute and deliver this Agreement.

            NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and
agreements herein contained and for such other good and valuable  consideration,
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, it is agreed as follows:

1. AGREEMENT TO VOTE. The  Shareholder  hereby agrees that,  except as expressly
set forth below,  during the time this Agreement is in effect, at any meeting of
the stockholders of the Company, however called, and in any action by consent of
the stockholders of the Company,  the Shareholder  shall: (a) vote the Shares in
favor of the Merger;  (b) vote the Shares  against any action or agreement  that
would  result in a breach of any  covenant,  representation  or  warranty or any
other  obligation  or agreement of the Company under the Merger  Agreement;  (c)
vote the Shares  against any action or agreement  that would  impede,  interfere
with,  delay,  postpone or attempt to discourage the Merger  including,  but not
limited to, (i) any extraordinary corporate transaction (other than the Merger),
such as a merger,  other  business  combination,  reorganization  or liquidation
involving the Company, (ii) a sale or transfer of a material amount of assets of
the Company or any of its  Subsidiaries,  (iii) any change in the  management or
board of directors of the Company,  except as otherwise  agreed to in writing by
the Purchaser,  (iv) any material  change in the present  capitalization  of the
Company, or (v) any other material change in the corporate structure or business
of the Company; and (d)


<PAGE>



without  limiting the  foregoing,  consult with the Purchaser  prior to any such
vote and vote such Shares in such manner as is determined by the Purchaser to be
in  compliance   with  the  provisions  of  this  Section  1.  The   Shareholder
acknowledges  receipt  and  review  of  a  copy  of  the  Merger  Agreement.  In
furtherance   thereof,  the  Shareholder  hereby  grants  to  the  Purchaser  an
irrevocable proxy to vote the Shares in accordance with the terms and conditions
of this  Agreement,  it being  understood  that such  proxy is  coupled  with an
interest.  Notwithstanding  the  foregoing,  if the  Board of  Directors  of the
Company  enters  into an  agreement  with  another  person or entity to effect a
Superior  Offer (as  defined in the Merger  Agreement),  and the  Company is not
otherwise  in  violation  of its  obligations  under  Section 5(g) of the Merger
Agreement,  then the obligations of the Shareholder set forth in this Section 1,
and the proxy granted by this Section 1, may be terminated by the Shareholder.

2.    REPRESENTATIONS  AND  WARRANTIES  OF  THE  SHAREHOLDER.  The   Shareholder
represents and warrants to the Purchaser as follows:

      2.1.  OWNERSHIP OF SHARES.  On the date hereof the Existing Shares are all
of the  Shares  currently  beneficially  owned  (which,  for  purposes  of  this
Agreement shall be determined in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"); PROVIDED, that beneficial
ownership  shall be determined  solely with  reference to Shares over which such
person has voting power as described in  subsection  (a)(1) of such Rule) by the
Shareholder  or any  Affiliate  (as  defined  in the  Merger  Agreement)  of the
Shareholder.  On the  Closing  Date (as  defined in the Merger  Agreement),  the
Shares will  constitute all of the shares of Common Stock owned  beneficially by
the Shareholder or any Affiliate of the  Shareholder.  The Shareholder  does not
have  any  rights  to  acquire  any  additional  shares  of  Common  Stock.  The
Shareholder  currently has with respect to the Existing  Shares,  and at Closing
will have with respect to the Shares, good, valid and marketable title, free and
clear of all liens,  encumbrances,  restrictions,  options,  warrants, rights to
purchase,  voting  agreements or voting trusts,  and claims of every kind (other
than the encumbrances  created by this Agreement and other than  restrictions on
transfer under applicable Federal and State securities laws).

      2.2. POWER;  BINDING AGREEMENT.  The Shareholder has the full legal right,
power  and  authority  to  enter  into  and  perform  all of  the  Shareholder's
obligations  under this Agreement.  The execution and delivery of this Agreement
by the Shareholder will not violate any other agreement to which the Shareholder
is a party including,  without limitation,  any voting agreement,  stockholder's
agreement or voting trust.  This  Agreement has been duly executed and delivered
by the Shareholder and constitutes a legal,  valid and binding  agreement of the
Shareholder,  enforceable in accordance with its terms. Neither the execution or
delivery of this  Agreement,  nor the  consummation  by the  Shareholder  of the
transactions contemplated hereby, will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment, agreement,  understanding,  arrangement or other restriction  of any
kind to which the Shareholder is a party or by which the Shareholder is bound.


                                    -2-


<PAGE>




      2.3.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or finder's fees  from the  Shareholder in connection with this Agreement or the
transactions  contemplated  hereby, exclusive of any commission or finder's fees
referred to in the Merger Agreement.

3.    REPRESENTATIONS AND WARRANTIES OF THE PURCHASER.  The Purchaser represents
and warrants to the Shareholder as follows:

      3.1. AUTHORITY. The Purchaser has full legal right, power and authority to
enter  into  and  perform  all of its  obligations  under  this  Agreement.  The
execution and delivery of this  Agreement by the Purchaser  will not violate any
other agreement to which the Purchaser is a party.  This Agreement has been duly
executed and  delivered by the  Purchaser  and  constitutes  a legal,  valid and
binding  agreement of the Purchaser,  enforceable in accordance  with its terms.
Neither the execution of this Agreement nor the consummation by the Purchaser of
the transactions contemplated hereby will (a) require any consent or approval of
or filing with any  governmental or other  regulatory  body, or (b) constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment,  agreement,  understanding,  arrangement or other restriction of any
kind to which the Purchaser is a party or by which it is bound.

      3.2.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or  finder's  fee  from  the  Purchaser in connection with this Agreement or the
transactions  contemplated hereby,  exclusive of any commission or finder's fees
referred to in the Merger Agreement.

4.  TERMINATION.  This Agreement (other than the provisions of Sections 5 and 6,
which shall survive any  termination of this  Agreement)  shall terminate on the
earliest of (a) the Effective Time (as defined in the Merger Agreement), (b) the
date immediately following the termination of the Merger Agreement in accordance
with its terms,  and (c) October 31, 1998.  The  foregoing is in addition to the
termination rights of the Shareholder set forth in Section 1 above.

5.    EXPENSES.  Except  as  provided  in Section 18, each party hereto will pay
all of its  expenses in  connection  with  the transactions contemplated by this
Agreement, including,  without  limitation, the fees and expenses of its counsel
and other advisers.

6. CONFIDENTIALITY.  The Shareholder recognizes that successful  consummation of
the   transactions   contemplated  by  this  Agreement  may  be  dependent  upon
confidentiality  with  respect to these  matters.  In this  connection,  pending
public  disclosure,  the Shareholder agrees that it will not disclose or discuss
these matters with anyone  (other than  officers,  directors,  legal counsel and
advisors of the  Shareholder,  the Purchaser or the Company) not a party to this
Agreement,  without prior written  consent of the Purchaser,  except for filings
required pursuant to the Exchange Act, and the rules and regulations thereunder,
or  disclosures  which the  Shareholder's  legal counsel  advises in writing are
necessary in order to fulfill the Shareholder's  obligations  imposed by law, in
which event the Shareholder shall give prompt prior notice of such disclosure to
the Purchaser.


                                    -3-


<PAGE>



7.    CERTAIN COVENANTS OF THE SHAREHOLDER.

      7.1.  Except in  accordance  with the  provisions of this  Agreement,  the
Shareholder  agrees,  prior to the  termination of this Agreement as provided in
Section 4 above, not to, directly or indirectly:

            (a) sell, transfer,  pledge,  encumber,  assign or otherwise dispose
of, or enter into any contract,  option or other  arrangement  or  understanding
with respect to the sale,  transfer,  pledge,  encumbrance,  assignment or other
disposition of, any of the Shares; or

            (b) grant any  proxies,  deposit any Shares  into a voting  trust or
enter into a voting agreement with respect to any Shares; or

            (c) take any action to encourage,  initiate or solicit any inquiries
or the making of any Acquisition  Proposal (as defined in the Merger Agreement),
engage in any negotiations concerning or provide any confidential information or
data to, or have any  discussions  with,  any  person or entity  relating  to an
Acquisition Proposal, or otherwise assist or facilitate any effort or attempt by
any person or entity  (other than the  Company,  or their  officers,  directors,
representatives,  agents,  affiliates  or  associates)  to make or  implement an
Acquisition  Proposal.  The Shareholders  will immediately cease and cause to be
terminated any existing activities, discussions or negotiations on its part with
any parties conducted heretofore with respect to any of the foregoing,  and will
notify the Company  promptly if they become aware of any such  inquiries or that
any proposals are received by, any such  information  is requested  from, or any
such  negotiations or discussions are sought to be instituted or continued with,
the Company (or its officers, directors, representatives,  agents, affiliates or
associates), such notice to include the material terms communicated.

      7.2. The Shareholder agrees,  while this Agreement is in effect, to notify
the Purchaser  promptly of the number of any shares of Common Stock  acquired by
the Shareholder after the date hereof.

8.    SURVIVAL   OF   REPRESENTATIONS   AND   WARRANTIES.  All  representations,
warranties, covenants and agreements made by the Shareholder or the Purchaser in
this Agreement shall survive regardless of any investigation at any time made by
or on behalf of any party.


                                    -4-


<PAGE>




9. NOTICES. All notices or other communications  required or permitted hereunder
shall be in writing (except as otherwise  provided herein),  given in the manner
provided in the Merger Agreement,  and shall be deemed duly given when received,
addressed as follows:


                              If to the Purchaser:

                              Primus Telecommunications Group, Inc.
                              2070 Chain Bridge Road
                              Vienna, VA 22102
                              Attention:  K. Paul Singh, Chairman and CEO
                              Facsimile:  (703) 902-2814

                              With a copy to:

                              Pepper Hamilton LLP
                              3000 Two Logan Square
                              Philadelphia, PA  19103-2799
                              Attention: James D. Epstein, Esquire
                              Facsimile: (215) 981-4750

                              If to the Shareholder:

                              c/o TresCom International, Inc.
                              200 East Broward Blvd.
                              Ft. Lauderdale, FL 33301
                              Facsimile:  (954) 463-4353

                              With a copy to:

                              Kelley Drye & Warren LLP
                              Two Stamford Plaza
                              281 Tresser Boulevard
                              Stamford, Connecticut  06901-3229
                              Fax:  (203) 351-8115
                              Attention:  John T. Capetta, Esquire

10. ENTIRE  AGREEMENT;  AMENDMENT.  This Agreement,  together with the documents
expressly referred to herein,  constitute the entire agreement among the parties
hereto with respect to the subject  matter  contained  herein and  supersede all
prior  agreements  and  understandings  among the parties  with  respect to such
subject  matter.  This  Agreement  may  not be  modified,  amended,  altered  or
supplemented except by an agreement in writing


                                    -5-


<PAGE>



executed by the party against whom such modification,  amendment,  alteration or
supplement is sought to be enforced.

11.  ASSIGNS.  This Agreement  shall be binding upon and inure to the benefit of
the  parties  hereto  and their  respective  successors,  assigns  and  personal
representatives,  but neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto without the
prior written consent of the other parties.

12. GOVERNING LAW. Except as expressly set forth below,  this Agreement shall be
governed by and construed in  accordance  with the laws of the State of Florida,
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of laws  thereof.  In addition,  each of the  Shareholders  and the
Purchaser  hereby  agree that any dispute  arising out of this  Agreement or the
Merger  shall be heard in the primary  trial court of the State of Florida or in
the United States  District  Court for the Southern  District of Florida and, in
connection  therewith,  each  party to this  Agreement  hereby  consents  to the
jurisdiction of such courts and agrees that any service of process in connection
with any dispute arising out of this Agreement or the Merger may be given to any
other  party  hereto  by  certified  mail,  return  receipt  requested,  at  the
respective addresses set forth in Section 9 above.

13.  INJUNCTIVE  RELIEF.  The parties agree that in the event of a breach of any
provision  of this  Agreement,  the  aggrieved  party may be without an adequate
remedy at law. The parties  therefore agree that in the event of a breach of any
provision of this Agreement,  the aggrieved party shall be entitled to obtain in
any court of  competent  jurisdiction  a decree of  specific  performance  or to
enjoin  the  continuing  breach  of such  provision,  in each case  without  the
requirement  that a bond be posted,  as well as to obtain  damages for breach of
this  Agreement.  By seeking or obtaining such relief,  the aggrieved party will
not be precluded  from seeking or obtaining  any other relief to which it may be
entitled.

14.   COUNTERPARTS;  FACSIMILE  SIGNATURES.   This  Agreement  may  be executed,
including execution by facsimile, in any number of  counterparts, each  of which
shall be deemed to be an original and all of which together shall constitute one
and the same document.

15.  SEVERABILITY.  Any term or provision of this Agreement  which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the  remaining  terms and  provisions  of this  Agreement  or
affecting  the validity or  enforceability  of any of the terms or provisions of
this Agreement in any other jurisdiction.  If any provision of this Agreement is
so broad as to be unenforceable,  such provision shall be interpreted to be only
so broad as is enforceable.

16.   FURTHER  ASSURANCES.  Each  party  hereto  shall  execute and deliver such
additional  documents  as  may  be  necessary  or  desirable  to  consummate the
transactions contemplated by this Agreement.



                                    -6-


<PAGE>



17. THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, expressed or implied,
shall be construed to give any person other than the parties hereto any legal or
equitable  right,  remedy or claim under or by reason of this  Agreement  or any
provision contained herein.

18. LEGAL EXPENSES.  In the event any legal proceeding is commenced by any party
to this Agreement to enforce or recover damages for any breach of the provisions
hereof,  the  prevailing  party in such legal  proceeding  shall be  entitled to
recover in such legal  proceeding from the losing party such prevailing  party's
costs and expenses incurred in connection with such legal proceedings, including
reasonable attorneys fees.

19.   AMENDMENT AND MODIFICATION.  This  Agreement may  be amended, modified and
supplemented  by  a  written  document  executed  by  the  Purchaser   and   the
Shareholder.




                 [Remainder of Page Intentionally Left Blank]


                                    -7-


<PAGE>



            IN WITNESS  WHEREOF,  the Purchaser has caused this  Agreement to be
executed  by its  duly  authorized  officers,  and  the  Shareholders  have duly
executed this Agreement, each as of the date and year first above written.


                              PURCHASER:

                              PRIMUS TELECOMMUNICATIONS GROUP, INC.


                              By:   /S/ K. PAUL SINGH
                                 -----------------------------------------
                                    K. Paul Singh, Chief Executive Officer

                              SHAREHOLDER:



                              /S/ WESLEY T. O'BRIEN
                              --------------------------------------------
                                    Wesley T. O'Brien


                                    -8-







                               VOTING AGREEMENT

            AGREEMENT  dated as of  February  3, 1998 by and  among  the  person
identified  as  a  Shareholder  of  TRESCOM   INTERNATIONAL,   INC.,  a  Florida
corporation (the "COMPANY"), on the signature page below (the "SHAREHOLDER") and
PRIMUS TELECOMMUNICATIONS GROUP, INC., a Delaware corporation (the "PURCHASER").

             WHEREAS,  the  Shareholder  owns,  as of the date  hereof,  220,032
shares of Common  Stock  (the  "EXISTING  SHARES",  together  with any shares of
common stock,  par value $.0419 per share, of the Company (the "COMMON  STOCK"),
acquired after the date hereof and prior to the  termination  hereof  (including
shares of Common  Stock  acquired  pursuant to the  exercise  of employee  stock
options  issued  by  the  Company  (the  "OPTIONS")),  hereinafter  collectively
referred to as the "SHARES");

            WHEREAS,  concurrently  herewith,  the  Company  and  Purchaser  are
entering into an Agreement and Plan of Merger (the "MERGER  AGREEMENT")  for the
merger of a subsidiary of the Company with and into the Company (the "MERGER");

            WHEREAS,  as a  condition  to their  willingness  to enter  into the
Merger   Agreement,   and  in  reliance  upon   Shareholder's   representations,
warranties, covenants and agreements hereunder, the Purchaser has requested that
the  Shareholder  agree,  and the  Shareholder  has  agreed,  to enter into this
Agreement;

            WHEREAS, to induce the Purchaser to enter into the Merger Agreement,
the Shareholder is willing to execute and deliver this Agreement.

            NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and
agreements herein contained and for such other good and valuable  consideration,
the receipt and sufficiency of which is hereby acknowledged, and intending to be
legally bound hereby, it is agreed as follows:

1. AGREEMENT TO VOTE. The  Shareholder  hereby agrees that,  except as expressly
set forth below,  during the time this Agreement is in effect, at any meeting of
the stockholders of the Company, however called, and in any action by consent of
the stockholders of the Company,  the Shareholder  shall: (a) vote the Shares in
favor of the Merger;  (b) vote the Shares  against any action or agreement  that
would  result in a breach of any  covenant,  representation  or  warranty or any
other  obligation  or agreement of the Company under the Merger  Agreement;  (c)
vote the Shares  against any action or agreement  that would  impede,  interfere
with,  delay,  postpone or attempt to discourage the Merger  including,  but not
limited to, (i) any extraordinary corporate transaction (other than the Merger),
such as a merger,  other  business  combination,  reorganization  or liquidation
involving the Company, (ii) a sale or transfer of a material amount of assets of
the Company or any of its  Subsidiaries,  (iii) any change in the  management or
board of directors of the Company,  except as otherwise  agreed to in writing by
the Purchaser,  (iv) any material  change in the present  capitalization  of the
Company, or (v) any other material change in the corporate structure or business
of the Company; and (d)


<PAGE>



without  limiting the  foregoing,  consult with the Purchaser  prior to any such
vote and vote such Shares in such manner as is determined by the Purchaser to be
in  compliance   with  the  provisions  of  this  Section  1.  The   Shareholder
acknowledges  receipt  and  review  of  a  copy  of  the  Merger  Agreement.  In
furtherance   thereof,  the  Shareholder  hereby  grants  to  the  Purchaser  an
irrevocable proxy to vote the Shares in accordance with the terms and conditions
of this  Agreement,  it being  understood  that such  proxy is  coupled  with an
interest.  Notwithstanding  the  foregoing,  if the  Board of  Directors  of the
Company  enters  into an  agreement  with  another  person or entity to effect a
Superior  Offer (as  defined in the Merger  Agreement),  and the  Company is not
otherwise  in  violation  of its  obligations  under  Section 5(g) of the Merger
Agreement,  then the obligations of the Shareholder set forth in this Section 1,
and the proxy granted by this Section 1, may be terminated by the Shareholder.

2.    REPRESENTATIONS  AND  WARRANTIES  OF  THE  SHAREHOLDER.  The   Shareholder
represents and warrants to the Purchaser as follows:

      2.1.  OWNERSHIP OF SHARES.  On the date hereof the Existing Shares are all
of the  Shares  currently  beneficially  owned  (which,  for  purposes  of  this
Agreement shall be determined in accordance with Rule 13d-3 under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"); PROVIDED, that beneficial
ownership  shall be determined  solely with  reference to Shares over which such
person has voting power as described in  subsection  (a)(1) of such Rule) by the
Shareholder  or any  Affiliate  (as  defined  in the  Merger  Agreement)  of the
Shareholder.  On the  Closing  Date (as  defined in the Merger  Agreement),  the
Shares will  constitute all of the shares of Common Stock owned  beneficially by
the Shareholder or any Affiliate of the  Shareholder.  The Shareholder  does not
have  any  rights  to  acquire  any  additional  shares  of  Common  Stock.  The
Shareholder  currently has with respect to the Existing  Shares,  and at Closing
will have with respect to the Shares, good, valid and marketable title, free and
clear of all liens,  encumbrances,  restrictions,  options,  warrants, rights to
purchase,  voting  agreements or voting trusts,  and claims of every kind (other
than the encumbrances  created by this Agreement and other than  restrictions on
transfer under applicable Federal and State securities laws).

      2.2. POWER;  BINDING AGREEMENT.  The Shareholder has the full legal right,
power  and  authority  to  enter  into  and  perform  all of  the  Shareholder's
obligations  under this Agreement.  The execution and delivery of this Agreement
by the Shareholder will not violate any other agreement to which the Shareholder
is a party including,  without limitation,  any voting agreement,  stockholder's
agreement or voting trust.  This  Agreement has been duly executed and delivered
by the Shareholder and constitutes a legal,  valid and binding  agreement of the
Shareholder,  enforceable in accordance with its terms. Neither the execution or
delivery of this  Agreement,  nor the  consummation  by the  Shareholder  of the
transactions contemplated hereby, will (a) require any consent or approval of or
filing with any  governmental  or other  regulatory  body,  or (b)  constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment, agreement,  understanding,  arrangement or other restriction  of any
kind to which the Shareholder is a party or by which the Shareholder is bound.


                                    -2-


<PAGE>




      2.3.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or finder's fees from the Shareholder in connection  with  this Agreement or the
transactions contemplated hereby,  exclusive of  any commission or finder's fees
referred to in the Merger Agreement.

3.    REPRESENTATIONS AND WARRANTIES OF THE PURCHASER.  The Purchaser represents
and warrants to the Shareholder as follows:

      3.1. AUTHORITY. The Purchaser has full legal right, power and authority to
enter  into  and  perform  all of its  obligations  under  this  Agreement.  The
execution and delivery of this  Agreement by the Purchaser  will not violate any
other agreement to which the Purchaser is a party.  This Agreement has been duly
executed and  delivered by the  Purchaser  and  constitutes  a legal,  valid and
binding  agreement of the Purchaser,  enforceable in accordance  with its terms.
Neither the execution of this Agreement nor the consummation by the Purchaser of
the transactions contemplated hereby will (a) require any consent or approval of
or filing with any  governmental or other  regulatory  body, or (b) constitute a
violation  of,  conflict  with or  constitute  a default  under,  any  contract,
commitment,  agreement,  understanding,  arrangement or other restriction of any
kind to which the Purchaser is a party or by which it is bound.

      3.2.  FINDER'S FEES.  No person is, or will be, entitled to any commission
or  finder's  fee  from  the  Purchaser in connection with this Agreement or the
transactions  contemplated  hereby, exclusive of any commission or finder's fees
referred to in the Merger Agreement.

4.  TERMINATION.  This Agreement (other than the provisions of Sections 5 and 6,
which shall survive any  termination of this  Agreement)  shall terminate on the
earliest of (a) the Effective Time (as defined in the Merger Agreement), (b) the
date immediately following the termination of the Merger Agreement in accordance
with its terms,  and (c) October 31, 1998.  The  foregoing is in addition to the
termination rights of the Shareholder set forth in Section 1 above.

5.    EXPENSES.  Except as provided in Section 18, each party  hereto  will  pay
all of its expenses in connection  with the  transactions  contemplated  by this
Agreement,  including,  without limitation, the fees and expenses of its counsel
and other advisers.

6. CONFIDENTIALITY.  The Shareholder recognizes that successful  consummation of
the   transactions   contemplated  by  this  Agreement  may  be  dependent  upon
confidentiality  with  respect to these  matters.  In this  connection,  pending
public  disclosure,  the Shareholder agrees that it will not disclose or discuss
these matters with anyone  (other than  officers,  directors,  legal counsel and
advisors of the  Shareholder,  the Purchaser or the Company) not a party to this
Agreement,  without prior written  consent of the Purchaser,  except for filings
required pursuant to the Exchange Act, and the rules and regulations thereunder,
or  disclosures  which the  Shareholder's  legal counsel  advises in writing are
necessary in order to fulfill the Shareholder's  obligations  imposed by law, in
which event the Shareholder shall give prompt prior notice of such disclosure to
the Purchaser.



                                    -3-


<PAGE>



7.    CERTAIN COVENANTS OF THE SHAREHOLDER.

      7.1.  Except in  accordance  with the  provisions of this  Agreement,  the
Shareholder  agrees,  prior to the  termination of this Agreement as provided in
Section 4 above, not to, directly or indirectly:

            (a) sell, transfer,  pledge,  encumber,  assign or otherwise dispose
of, or enter into any contract,  option or other  arrangement  or  understanding
with respect to the sale,  transfer,  pledge,  encumbrance,  assignment or other
disposition of, any of the Shares; or

            (b) grant any  proxies,  deposit any Shares  into a voting  trust or
enter into a voting agreement with respect to any Shares; or

            (c) take any action to encourage,  initiate or solicit any inquiries
or the making of any Acquisition  Proposal (as defined in the Merger Agreement),
engage in any negotiations concerning or provide any confidential information or
data to, or have any  discussions  with,  any  person or entity  relating  to an
Acquisition Proposal, or otherwise assist or facilitate any effort or attempt by
any person or entity  (other than the  Company,  or their  officers,  directors,
representatives,  agents,  affiliates  or  associates)  to make or  implement an
Acquisition  Proposal.  The Shareholders  will immediately cease and cause to be
terminated any existing activities, discussions or negotiations on its part with
any parties conducted heretofore with respect to any of the foregoing,  and will
notify the Company  promptly if they become aware of any such  inquiries or that
any proposals are received by, any such  information  is requested  from, or any
such  negotiations or discussions are sought to be instituted or continued with,
the Company (or its officers, directors, representatives,  agents, affiliates or
associates), such notice to include the material terms communicated.

      7.2. The Shareholder agrees,  while this Agreement is in effect, to notify
the Purchaser  promptly of the number of any shares of Common Stock  acquired by
the Shareholder after the date hereof.

8.    SURVIVAL   OF   REPRESENTATIONS  AND   WARRANTIES.   All  representations,
warranties, covenants and agreements made by the Shareholder or the Purchaser in
this Agreement shall survive regardless of any investigation at any time made by
or on behalf of any party.


                                    -4-


<PAGE>




9. NOTICES. All notices or other communications  required or permitted hereunder
shall be in writing (except as otherwise  provided herein),  given in the manner
provided in the Merger Agreement,  and shall be deemed duly given when received,
addressed as follows:


                              If to the Purchaser:

                              Primus Telecommunications Group, Inc.
                              2070 Chain Bridge Road
                              Vienna, VA 22102
                              Attention:  K. Paul Singh, Chairman and CEO
                              Facsimile:  (703) 902-2814

                              With a copy to:

                              Pepper Hamilton LLP
                              3000 Two Logan Square
                              Philadelphia, PA  19103-2799
                              Attention: James D. Epstein, Esquire
                              Facsimile: (215) 981-4750

                              If to the Shareholder:

                              c/o TresCom International, Inc.
                              200 East Broward Blvd.
                              Ft. Lauderdale, FL 33301
                              Facsimile:  (954) 463-4353

                              With a copy to:

                              Kelley Drye & Warren LLP
                              Two Stamford Plaza
                              281 Tresser Boulevard
                              Stamford, Connecticut  06901-3229
                              Fax:  (203) 351-8115
                              Attention:  John T. Capetta, Esquire

10. ENTIRE  AGREEMENT;  AMENDMENT.  This Agreement,  together with the documents
expressly referred to herein,  constitute the entire agreement among the parties
hereto with respect to the subject  matter  contained  herein and  supersede all
prior  agreements  and  understandings  among the parties  with  respect to such
subject  matter.  This  Agreement  may  not be  modified,  amended,  altered  or
supplemented except by an agreement in writing


                                    -5-


<PAGE>



executed by the party against whom such modification,  amendment,  alteration or
supplement is sought to be enforced.

11.  ASSIGNS.  This Agreement  shall be binding upon and inure to the benefit of
the  parties  hereto  and their  respective  successors,  assigns  and  personal
representatives,  but neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto without the
prior written consent of the other parties.

12. GOVERNING LAW. Except as expressly set forth below,  this Agreement shall be
governed by and construed in  accordance  with the laws of the State of Florida,
regardless of the laws that might otherwise govern under  applicable  principles
of conflicts of laws  thereof.  In addition,  each of the  Shareholders  and the
Purchaser  hereby  agree that any dispute  arising out of this  Agreement or the
Merger  shall be heard in the primary  trial court of the State of Florida or in
the United States  District  Court for the Southern  District of Florida and, in
connection  therewith,  each  party to this  Agreement  hereby  consents  to the
jurisdiction of such courts and agrees that any service of process in connection
with any dispute arising out of this Agreement or the Merger may be given to any
other  party  hereto  by  certified  mail,  return  receipt  requested,  at  the
respective addresses set forth in Section 9 above.

13.  INJUNCTIVE  RELIEF.  The parties agree that in the event of a breach of any
provision  of this  Agreement,  the  aggrieved  party may be without an adequate
remedy at law. The parties  therefore agree that in the event of a breach of any
provision of this Agreement,  the aggrieved party shall be entitled to obtain in
any court of  competent  jurisdiction  a decree of  specific  performance  or to
enjoin  the  continuing  breach  of such  provision,  in each case  without  the
requirement  that a bond be posted,  as well as to obtain  damages for breach of
this  Agreement.  By seeking or obtaining such relief,  the aggrieved party will
not be precluded  from seeking or obtaining  any other relief to which it may be
entitled.

14.   COUNTERPARTS;  FACSIMILE  SIGNATURES.  This  Agreement  may  be  executed,
including execution by  facsimile, in any  number of counterparts, each of which
shall be deemed to be an original and all of which together shall constitute one
and the same document.

15.  SEVERABILITY.  Any term or provision of this Agreement  which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such invalidity or  unenforceability  without rendering invalid
or  unenforceable  the  remaining  terms and  provisions  of this  Agreement  or
affecting  the validity or  enforceability  of any of the terms or provisions of
this Agreement in any other jurisdiction.  If any provision of this Agreement is
so broad as to be unenforceable,  such provision shall be interpreted to be only
so broad as is enforceable.

16.   FURTHER ASSURANCES.  Each  party  hereto  shall  execute  and deliver such
additional  documents  as  may  be  necessary  or  desirable  to  consummate the
transactions contemplated by this Agreement.


                                    -6-


<PAGE>



17. THIRD PARTY BENEFICIARIES.  Nothing in this Agreement, expressed or implied,
shall be construed to give any person other than the parties hereto any legal or
equitable  right,  remedy or claim under or by reason of this  Agreement  or any
provision contained herein.

18. LEGAL EXPENSES.  In the event any legal proceeding is commenced by any party
to this Agreement to enforce or recover damages for any breach of the provisions
hereof,  the  prevailing  party in such legal  proceeding  shall be  entitled to
recover in such legal  proceeding from the losing party such prevailing  party's
costs and expenses incurred in connection with such legal proceedings, including
reasonable attorneys fees.

19.   AMENDMENT AND MODIFICATION.  This Agreement may be amended, modified and
supplemented  by  a  written  document  executed  by  the  Purchaser  and  the
Shareholder.






                 [Remainder of Page Intentionally Left Blank]


                                    -7-


<PAGE>


            IN WITNESS  WHEREOF,  the Purchaser has caused this  Agreement to be
executed  by its  duly  authorized  officers,  and the  Shareholders  have  duly
executed this Agreement, each as of the date and year first above written.


                              PURCHASER:

                              PRIMUS TELECOMMUNICATIONS GROUP, INC.


                              By:         /S/ K. PAUL SINGH
                                 -----------------------------------------
                                    K. Paul Singh, Chief Executive Officer


                              SHAREHOLDER:


                                         /S/ RUDY MCGLASHAN
                              --------------------------------------------
                                         Rudy McGlashan


                                    -8-







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