1
                                                                    EXHIBIT 10.3

                          AGREEMENT FOR THE TRANSFER OF
                                 OMNICOM SHARES


                                  BY AND AMONG:

                                 ALAIN NICOLAZZI

                             FLORENT MARTENNE-DUPLAN

                               PHILIPPE AIT YAHIA

                                (The "Founders")

                     AND VARIOUS OTHER OMNICOM SHAREHOLDERS

                                 (The "Sellers")

                                       AND

                        ESPRIT TELECOM HOLDINGS, LIMITED

                                (The "Purchaser")

                                       and

                     Global TeleSystems Group, Inc. ("GTS")


                               Date: 14 April 1999





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                  AGREEMENT FOR THE TRANSFER OF OMNICOM SHARES

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


BY AND AMONG

Mr. ALAIN NICOLAZZI, an individual of French nationality, residing at 23, rue
des Moulins, 78290 Croissy sur Seine, France,

                                 (hereinafter referred to as "Mr. Nicolazzi"),


NICOM INVESTISSEMENTS ("Company A"), a French societe civile with an issued
capital of 69,978,300 Euros having its registered office at 23 rue des Moulins,
78290 Croissy sur Seine, France, registered with the Trade and Company Registry
of Versailles under number D422439448 represented by Mr. Nicolazzi in his
capacity as "gerant", duly authorized for that purpose,

Ms. Marie Nicolazzi, a child of Mr. Nicolazzi and an individual of French
nationality, residing at 23, rue des Moulins, 78290 Croissy sur Seine, France,
represented by her parents, Mr. Nicolazzi and Mrs. Valerie Nicolazzi, Nee Diez,

                                                                             AND

Ms. Camille Nicolazzi, a child of Mr. Nicolazzi and an individual of French
nationality, residing at 23, rue des Moulins, 78290 Croissy sur Seine, France,
represented by her parents, Mr. Nicolazzi and Mrs. Valerie Nicolazzi, nee Diez,

                                                                             AND

Mr. Remi Nicolazzi, a child of Mr. Nicolazzi and an individual of French
nationality, residing at 23, rue des Moulins, 78290 Croissy sur Seine, France,
represented by his parents, Mr. Nicolazzi and Mrs. Valerie Nicolazzi, nee Diez,

(Mr. Nicolazzi, Company A, and the Nicolazzi children collectively are referred
to hereafter as the "Nicolazzi Group")

Mr. FLORENT MARTENNE-DUPLAN, an individual of French nationality, residing at
12, villa Memoris, 94120 Fontenay sous Bois, France,

                              (hereinafter referred to as "Mr. Martenne-Duplan")



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FINANCIERE DU MARAIS, ("Company B"), a French societe civile with an issued
capital of 12,915,500 Euros having its registered office at 10 avenue Pozzo di
Borgo, 92210 SAINT CLOUD, France, registered with the Trade and Company Registry
of Nanterre under number D422474890 represented by Mr. Martenne-Duplan in his
capacity as "gerant", duly authorized for that purpose,

Mr. Sebastien Martenne-Duplan, a child of Mr. Martenne-Duplan and an individual
of French nationality, residing at 12, villa Memoris, 94120 Fontenay sous Bois,
France, represented by his parents, Mr. Martenne-Duplan and Mrs. Jeanne
Martenne-Duplan nee Nanni,

                                                                             AND

Mr. Antonin Martenne-Duplan, a child of Mr. Martenne-Duplan and an individual of
French nationality, residing at 12, villa Memoris, 94120 Fontenay sous Bois,
France, represented by his parents, Mr. Martenne-Duplan and Mrs. Jeanne
Martenne-Duplan nee Nanni,

                                                                             AND

Ms. Magali Martenne-Duplan, a child of Mr. Martenne-Duplan and an individual of
French nationality, residing at 12, villa Memoris, 94120 Fontenay sous Bois,
France, represented by her parents, Mr. Martenne-Duplan and Mrs. Jeanne
Martenne-Duplan nee Nanni,

(Mr. Martenne-Duplan, Company B, and the Martenne-Duplan children collectively
are referred to hereafter as the "Martenne-Duplan Group")

Mr. PHILIPPE AIT YAHIA, an individual of French nationality, residing at 21, rue
des Hauts Closeaux 92310, Sevres, France,

                                   (hereinafter referred to as "Mr. Ait Yahia"),

HESPERIA ("Company C"), a French societe civile with an issued capital of
7,372,400 Euros having its registered office at 21 rue des Hauts Closeaux 92310,
Sevres, France, registered with the Trade and Company Registry of Nanterre under
number D422474176 represented by Mr. Ait-Yahia in his capacity as "gerant", duly
authorized for that purpose,

Mr. Samuel Ait Yahia, a child of Mr. Ait Yahia and an individual of French
nationality, residing at 21 rue des Hauts Closeaux 92310, Sevres, France,
represented by his parents, Mr. Ait Yahia and Ms. Sandrine Nicourd,

                                                                             AND

(Mr. Ait Yahia, Company C, and the Ait Yahia child collectively are referred to
hereafter as the "Ait Yahia Group")



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(Mr. Nicolazzi, Mr. Martenne-Duplan and Mr. Ait Yahia being hereinafter
collectively referred to as the "Founders")

(The Nicolazzi Group, the Martenne-Duplan Group, the Ait Yahia Group, being
hereinafter collectively referred to as the "Sellers")

(Any of the Nicolazzi Group, the Martenne-Duplan Group or the Ait Yahia Group,
being hereinafter sometimes referred to singularly as a "Group")

                                                                             AND

Esprit Telecom Holdings, Limited, a corporation duly registered in England with
an authorized capital of 1,00,000 pounds sterling, having its registered office
at Minerva House, Velpy Street, Reading, RG1 1AR, represented by Mr. Robert
Schriesheim, duly authorized for that purpose,

                                    (hereinafter referred to as the "Purchaser")

Global TeleSystems Group, Inc. ("GTS"), a Delaware corporation having its
offices at 1751 Pinnacle Drive, North Tower, 12th Floor, McLean, Virginia 22102,
represented by Mr. Robert Schreisheim in his capacity as Executive Vice
President and Chief Corporate Development Officer, duly authorized for that
purpose.


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                                    RECITALS


WHEREAS, Edison is a French corporation ("societe anonyme") with, as of December
31, 1998, an authorized capital of 9,500,205 French francs consisting of
1,900,041 shares with a par value of 5 French francs per share, having its
registered office at 86 rue de Thiers, 92100, Boulogne Billancourt, registered
with the Nanterre Trade and Company Registry under number B392 156485
(hereinafter referred to as the "Company");

WHEREAS, the Sellers own and hold 927,357 shares of common stock in the Company
(hereinafter referred to as the "Shares"), representing, as of December 31,
1998, 48.81% of the issued and outstanding capital of the Company;

WHEREAS, the Company is listed on the Nouveau Marche of the Paris Bourse
("Nouveau Marche");

WHEREAS, the Purchaser has informed the Sellers of its intent to acquire the
Shares and any of the Company's common stock and convertible bonds and will
undertake to make an offer (an "Offer") to all of the minority shareholders of
the Company and all of the holders of the Company's convertible bonds to
purchase the remaining common stock and convertible bonds of the Company;

WHEREAS, in connection with the purchase of the Shares, the Purchaser also
intends to purchase common stock of the Company owned by Mr. Laurent Desportes
pursuant to a separate agreement of even date herewith;

WHEREAS, the Purchaser has informed the Sellers of its intent to transfer all of
the Shares and any of the Company's common stock acquired pursuant to the Offer
to a subsidiary of the Purchaser, Esprit Telecom France S.A.; and

WHEREAS, the Sellers have agreed to transfer the Shares to the Purchaser
pursuant to the terms and subject to the conditions set forth in this Agreement
and the Purchaser has agreed to acquire the Shares pursuant to the terms and
subject to the conditions set forth in this Agreement.




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                          IT HAS BEEN AGREED AS FOLLOWS

ARTICLE 1.                          TRANSFER

1.1      Sale of the Shares

         Subject to the terms and conditions set forth in this Agreement, each
         Seller hereby undertakes to transfer, on the Transfer Date (as defined
         below), all of the Shares it owns and holds in the Company (the number
         of Shares in the Company held by each Seller is set forth in Appendix
         1.1) to the Purchaser who hereby undertakes to acquire such Shares, on
         the Transfer Date, in consideration of which each Seller will receive
         the purchase price as set forth in Article 1.2.

         The Purchaser shall acquire the interest in and title to the Shares and
         all the rights and dividends deriving therefrom and shall be subrogated
         in all the rights and obligations relating to the Shares as of the
         Transfer Date (as defined below). Accordingly, the Purchaser shall be
         entitled to be paid any dividend paid after the Transfer Date.

         The Sellers and the Purchaser shall take any action required for such
         transfer to be possible in compliance with French stock exchange
         regulations. The Purchaser and the Sellers shall appoint any brokers in
         connection with the transfer of the Shares.

1.2      Purchase Price

         (i)      The consideration for the sale of the Shares shall be equal to
                  a per Share price (the "Purchase Price") of 195 Euros composed
                  of: (a) 97.50 Euros per Share in immediately available funds
                  and (b) 97.50 Euros per Share in the to be newly issued common
                  shares ("GTS Shares") of Global TeleSystems Group, Inc.
                  ("GTS"). GTS undertakes on behalf of the Purchaser to issue
                  the GTS Shares to each Seller as part of the consideration
                  payable by the Purchaser. The value of the GTS Shares is
                  53.5842 Euros, which has been determined by taking the average
                  of each of the daily closing quotations of GTS Shares on the
                  NASDAQ market as published in The Wall Street Journal for the
                  period March 26, 1999 through and including April 9, 1999,
                  converted to Euros at the exchange rate of 1.0778 Euros per
                  U.S. dollar.

                  The aggregate purchase price shall be divided among the
                  Sellers in the following manner:

                  -     27,786,295.96 Euros and 172,852 GTS Shares shall be the
                        purchase price of the shares held by Mr. Nicolazzi;

                  -     5,849,886.39 Euros and 109,176 GTS Shares shall be the
                        purchase price of the shares held by Mr.
                        Martenne-Duplan;



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                  -     9,396,666.43 Euros and 105,662 GTS Shares shall be the
                        purchase price of the shares held by Mr. Philippe Ait
                        Yahia;

                  -     2,744,072.06 Euros and 5,691 GTS Shares shall be the
                        purchase price of the shares held by Ms. Marie
                        Nicolazzi;

                  -     2,744,072.06 Euros and 5,691 GTS Shares shall be the
                        purchase price of the shares held by Ms. Camille
                        Nicolazzi;

                  -     2,744,072.06 Euros and 5,691 GTS Shares shall be the
                        purchase price of the shares held by Mr. Remi Nicolazzi;

                  -     1,669,260.13 Euros and 27,074 GTS Shares shall be the
                        purchase price of the shares held by Mr. Sebastien
                        Martenne-Duplan;

                  -     1,669,260.13 Euros and 27,074 GTS Shares shall be the
                        purchase price of the shares held by Mr. Antonin
                        Martenne-Duplan;

                  -     1,669,260.13 Euros and 27,074 GTS Shares shall be the
                        purchase price of the shares held by Ms. Magali
                        Martenne-Duplan;

                  -     2,808,032.52 Euros and 5,822 GTS Shares shall be the
                        purchase price of the shares held by Mr. Samuel Ait
                        Yahia;

                  -     24,058,906.60 Euros and 931,275 GTS Shares shall be the
                        purchase price of the shares held by Company A;

                  -     6,497,009.22 Euros and 133,476 GTS Shares shall be the
                        purchase price of the shares held by Company B;

                  -     779,979.46 Euros and 130,838 GTS Shares shall be the
                        purchase price of the shares held by Company C;

                  it being understood that the cash and GTS Shares received in
                  consideration for the Company Shares held in "nue propriete"
                  by the children of the Founders will be held by them in "nue
                  propriete".

                  (ii)  The GTS Shares (a) shall be unregistered, validly
                        issued, and fully paid-up and (b) shall have the same
                        rights and obligations as other shares of GTS on the
                        Transfer Date, including but not limited to the right to
                        receive any dividends declared by GTS on and after the
                        Transfer Date.

                        Each of the Sellers hereby undertakes that:




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                        (a)  immediately after the Transfer Date, he shall be
                             permitted to transfer to third parties up to fifty
                             percent (50%) of the GTS Shares (the "Transferable
                             GTS Shares") in accordance with applicable
                             securities law, including those referenced in
                             Article 1.2(ii)(d); and

                        (b)  on the Transfer Date (as defined below), he shall
                             cause each of the Guarantors (as defined below) to
                             escrow with an independent escrow agent selected by
                             Purchaser pursuant to three (3) escrow agreements
                             (the "Escrow Agreements") to be negotiated in good
                             faith before the Transfer Date, GTS Shares (the
                             "Escrowed Shares") in the following manner: Company
                             A shall escrow 248,003 GTS Shares representing
                             66.45% (the "Nicolazzi Percentage"); Company B
                             shall escrow 71,640 GTS Shares, representing 19.19%
                             (the "Martenne-Duplan Percentage"); and Company C
                             shall escrow 53,601 GTS Shares, representing 14.36%
                             (the "Ait Yahia Percentage") (sometimes referred to
                             hereafter generally as a "Guarantor Percentage").
                             On the Transfer Date, the Escrowed Shares have a
                             value of twenty million (20,000,000 Euros) based on
                             the value of each GTS Share of 53.5842 Euros. The
                             Escrowed Shares shall be treated respectively in
                             accordance with the Escrow Agreements which shall
                             provide, inter alia, that, until the later of June
                             30, 2000 and thirty days after the filing by GTS of
                             its 1999 Form 10-k, the Guarantors shall not
                             transfer the Escrowed Shares; and

                        (c)  with respect to the remaining GTS Shares (i.e., the
                             GTS Shares minus the sum of the Transferable GTS
                             Shares and the Escrowed Shares; the "Remaining GTS
                             Shares"), no Seller shall transfer any such GTS
                             Shares until six months after the Transfer Date
                             provided, however, that the Remaining Shares may be
                             transferred in accordance with applicable
                             securities laws, including those referenced in
                             Article 1.2(ii)(d); and

                        (d)  prior to the registration, it will not sell or
                             transfer all or any part of the GTS Shares unless
                             and until it shall first have given notice to GTS
                             describing in reasonable detail such sale or
                             transfer and have furnished to GTS either (i) an
                             opinion of U.S. legal counsel, (selected by such
                             Seller and in form and substance reasonably
                             satisfactory to Purchaser) to the effect that the
                             proposed sale or transfer may be made without
                             registration under the Securities Act of 1993, as
                             amended (the "Securities Act") or (ii) an
                             interpretative letter from the staff of the
                             Securities and Exchange Commission ("SEC") to the
                             effect that no enforcement action will be
                             recommended if the proposed sale or transfer is
                             made without registration under the Securities Act.



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                             Notwithstanding the foregoing, no restriction on 
                                    the right of the Sellers to transfer their
                                    respective GTS Shares shall apply to:

                                    (i) Sales or transfers of GTS Shares by a
                                    Seller to an affiliate or relative of such
                                    Seller; provided that such affiliate or
                                    relative agrees to be bound by the terms and
                                    conditions of this Agreement to the same
                                    extent as the transferor Seller;

                                    (ii) Sales or transfers of GTS Shares made
                                    in reliance upon Rule 144 or 145 (or any
                                    successor provision) under the Securities
                                    Act;

                                    (iii) Sales or transfers of GTS Shares by
                                    operation of law, whether pursuant to a
                                    statutory merger or consolidation or
                                    otherwise;

                                    (iv) Sales or transfers of GTS Shares
                                    pursuant to and following the commencement
                                    of any tender offer or exchange offer by GTS
                                    or any third party to purchase outstanding
                                    GTS Shares or pursuant to any business
                                    combination transaction or other transaction
                                    approved by the shareholders of GTS;

                                    (v) pledges or hypothecations of GTS Shares
                                    to one or more bona fide financial
                                    institutions and any foreclosure thereof;
                                    and

                                    (vi) Sales or transfers of GTS Shares
                                    pursuant to an effective registration
                                    statement filed under the Securities Act;

                           provided, however, that in no event shall Escrowed
                           Shares be transferred prior to the end of the six
                           month escrow period unless they are replaced by
                           assets of an equivalent value and in form acceptable
                           to Purchaser in its sole discretion; provided,
                           however, that the Purchaser agrees that Euros, U.S.
                           dollars or French francs in an amount equal to the
                           then-current market value of the Escrowed Shares or
                           the securities offered in connection with the offer
                           shall be acceptable to the Purchaser.

                           Purchaser shall, subject to the restrictions of this
                           Article, and upon request of the Sellers, assist and
                           cooperate with the Sellers for the purpose of any
                           transfer of their respective GTS Shares.

                           Prior to the Registration Date, Purchaser may cause
                           GTS to place legends as follows on the certificates
                           for the GTS Shares concerning the restrictions set
                           forth in the preceding paragraphs of this Article 1.2
                           and may refuse to transfer any of such GTS Shares on
                           its books should the holder thereof attempt to
                           transfer any of them otherwise than in compliance
                           with the preceding paragraphs of this Article 1.2:



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                           Each of the Transferable GTS Shares, the Escrowed
                           Shares and the Remaining GTS Shares shall be legended
                           as follows:

                                    "THE SECURITIES EVIDENCED HEREBY HAVE NOT
                                    BEEN REGISTERED UNDER THE SECURITIES ACT OF
                                    1993, AS AMENDED (THE "SECURITIES ACT"), OR
                                    ANY STATE OR OTHER SECURITIES LAWS. NEITHER
                                    THIS SECURITY NOR ANY INTEREST OR
                                    PARTICIPATION HEREIN MAY BE TRANSFERRED
                                    UNLESS SUCH TRANSFER IS MADE IN CONNECTION
                                    WITH AN EFFECTIVE REGISTRATION STATEMENT
                                    UNDER SUCH ACT OR PURSUANT TO AN EXEMPTION
                                    FROM THE REGISTRATION REQUIREMENTS OF SUCH
                                    ACT OR SUCH ACT DOES NOT APPLY."

                           In addition, the Escrowed Shares shall be legended as
                           follows:

                                    "THE SECURITIES EVIDENCED HEREBY ARE SUBJECT
                                    TO THE TERMS OF THAT CERTAIN ESCROW
                                    AGREEMENT DATED AS OF APRIL 21, 1999 WHICH,
                                    INTER ALIA, PROHIBITS TRANSFER OF THESE
                                    SECURITIES UNTIL THE LATER OF JUNE 30, 2000
                                    AND THIRTY (30) DAYS AFTER THE FILING BY
                                    ISSUER OF ITS 1999 FORM 10-K."

                  In addition, the Remaining GTS Shares shall be legended as
follows:

                                    "THE SECURITIES EVIDENCED HEREBY MAY NOT BE
                                    TRANSFERRED UNTIL OCTOBER 21, 1999." 

1.3      Transfer Date

         (i)      The transfer of the Shares will take place as soon as
                  possible, but in any event no later than five (5) business
                  days from the date of execution of this Agreement (the
                  "Transfer Date").

         (ii)     On the Transfer Date:

                  (a)      the Purchaser and the Sellers shall take any action
                           necessary for the transfer of the Shares in
                           compliance with the French stock exchange
                           regulations;

                  (b)      concurrent with, and subject to, Purchaser's receipt
                           of the items set forth in Section 1.3(ii) (d), the
                           Purchaser shall:



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                           -       deliver to each of the Sellers the cash part
                                   of the Purchase Price set forth in Article
                                   1.2(i) in immediately available funds, by
                                   wire transfer or bank check as requested by
                                   such Seller;

                           -       deliver all documents evidencing the issue
                                   and allotment to the Sellers of the GTS
                                   Shares, including, without limitation,
                                   legended share certificates;

                           -       provide to each of the Sellers a legal
                                   opinion in a form reasonably satisfactory to
                                   Sellers;

                           -       provide to the Guarantors the duly executed
                                   (by Purchaser) Escrow Agreements;

                           -       provide to the Sellers a duly executed (by
                                   Purchaser) original of the Consultancy
                                   Agreements (as defined below);

                           -       provide to the Sellers a certificate duly
                                   executed by the Purchaser (the "Purchaser's
                                   Certificate") affirming that, to the best
                                   knowledge of the Purchaser, no material
                                   adverse change in the situation of GTS has
                                   occurred from and after the date of execution
                                   of this Agreement through and including the
                                   Transfer Date;

                           (c)     concurrent with, and subject to, Purchaser's
                                   receipt of the items set forth in Section
                                   1.3(ii) (d), GTS shall:

                           -       provide to the Sellers an officer's
                                   certificate of good standing of GTS in a form
                                   reasonably acceptable to Sellers; and

                           -       provide to the Sellers a duly executed (by
                                   GTS) original of the Registration Rights
                                   Agreement (as defined below).

                           (d)     concurrent with and subject to the Seller's
                                   receipt of the items set forth in 1.3(ii)(b)
                                   and (c), the Sellers shall deliver the
                                   following documents to the Purchaser:

                           -       the duly executed share transfer forms in
                                   respect of the Shares;

                           -       a certificate duly executed by the Guarantors
                                   (the "Guarantors' Certificate") affirming
                                   that, to the best knowledge of the Founders,
                                   no material adverse change in the situation
                                   of the Company has occurred from and after
                                   the date of execution of this Agreement
                                   through and including the Transfer Date;



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                           -       a true and correct copy of the "avis de
                                   reunion" to be published in the BALO and the
                                   minutes of the board meeting convening an
                                   ordinary general meeting of the shareholders
                                   of the Company (I) appointing four (4)
                                   additional board members (Messrs. Hans Peter
                                   Kohlhamer, Pierre Henri Drevon, Jean-Pierre
                                   Vandromme, and Timothy Enneking) nominated by
                                   Purchaser to the Company's board of directors
                                   and (II) giving the advice of the board as to
                                   the Offer and (III) amending the Stock Option
                                   Plan;

                           -       the minutes of a board meeting recording the
                                   resignation of Mr. Ait Yahia and Mr.
                                   Martenne-Duplan as managing directors
                                   ("directeurs generaux") and nominating one
                                   substitute managing director (Pierre-Henri
                                   Drevon) ;

                           -       certificate of the Founders, acting as
                                   directors of the Company, stating that they
                                   shall not take without prior approval of the
                                   Purchaser, any action out of the ordinary
                                   course of business, except for actions deemed
                                   by the Founders to be reasonably required to
                                   preserve the going concern value of the
                                   Company, beginning on the date of execution
                                   of this Agreement until the shareholders'
                                   meeting;

                           -       the legal opinion of (I) Sellers' counsel,
                                   (II) "Notaire", and (III) special counsel to
                                   the Sellers, each in a form reasonably
                                   satisfactory to the Purchaser; - the duly
                                   executed (by the Founders) Consultancy
                                   Agreements (as defined below); and

                           -       the duly executed (by the Guarantors) Escrow
                                   Agreements to be negotiated in good faith
                                   prior to the Transfer Date.

ARTICLE 2.                 REPRESENTATIONS AND WARRANTIES OF THE GUARANTORS

Each of Company A, Company B, and Company C (each, a "Guarantor"; collectively,
the "Guarantors") severally and not jointly ("responsabilite conjointe et
non-solidaire") represents and warrants to the Purchaser as of the date hereof
as follows:

2.1      Organization of the Company

         The Company is a corporation duly organized and validly existing under
         the laws of France and has all necessary corporate power and authority
         to own, operate and lease its properties and to conduct its business as
         presently conducted.




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         The Company has delivered to the Purchaser true and correct copies of
         its Articles of Incorporation ("statuts"), and all amendments thereto,
         and has delivered or provided for the Purchaser's review true and
         correct copies of all of the minutes of all directors' and
         shareholders' meetings held prior to the date hereof.

         The Company and the Subsidiaries of the Company (as defined below) have
         not ceased making payments to creditors nor are they insolvent or
         unable to pay their debts ("cessation de paiement").

2.2      Capital Structure

         As of December 31, 1998, the issued capital stock of the Company
         consists of 1,900,041 shares of common stock of which 1,900,041 shares
         were issued and outstanding. All of such outstanding shares have been
         validly issued and are fully paid and nonassessable. No Shares are
         subject to preemptive rights, rights of first refusal, or any other
         similar rights and, to the best knowledge of the Guarantors, no shares
         of common stock of the Company are subject to preemptive rights, rights
         of first refusal, or any other similar rights.

         129,894 convertible bonds and 55,620 stock options are outstanding, and
         the Company has not issued any other convertible bonds or stock
         options. Beginning on December 31, 1998 through and including the date
         immediately preceding the execution of this Agreement, two thousand
         nine hundred fifty-three (2,935) bonds have been converted into common
         shares of the Company and the Company has not otherwise issued capital
         stock of the Company in addition to that set forth in the immediately
         preceding paragraph. Except as provided herein, the Company has not
         issued any other securities or rights giving access to capital or
         voting rights.

         There exists no contract or commitment of any nature, whether signed or
         unsigned, with a view to allocating or issuing shares, or giving any
         person the right to buy or pre-empt, in whole or in part, the Shares of
         the Company.

         Save as provided herein and as set forth in Appendix 2.2.1, there are
         no outstanding options, warrants, rights to subscribe to, calls or
         commitments of any character whatsoever relating to, or securities or
         rights convertible into, any shares of common stock of the Company or
         arrangements by which the Company is or may become bound to issue
         additional shares of common stock of the Company.

         Stock options have been granted to the Company's employees set forth in
         Appendix 2.2.2 hereto and in accordance with that certain Reglement du
         Plan d' Options de Souscriptions 1997/1999 (the "Stock Option Plan").

         The Company has not received any notice from a shareholder stating that
         it owns two percent (2%) or more of the common stock of the Company.



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         The Shares represent no less than 48.73% of the issued share capital
         and each Share represents at least one voting right in the Company as
         of the date of execution of this Agreement.

2.3      Shareholders in other companies

         All shares or other shareholdings or rights that the Company owns and
         holds in any other company, partnership or legal entity (hereinafter
         referred to as the "Subsidiaries of the Company") are set forth in
         Appendix 2.3. These shareholdings or other rights are held free of any
         liens, privileges, charges, guarantees, options, or other rights.

2.4      Licenses

         The Company and the Subsidiaries of the Company have obtained all
         licenses, permits, authorizations and approvals necessary to conduct
         its business. In particular, the Company (a) has received in France
         from the Autorite de Regulation des Telecommunications ("l'ART") the
         authorization to use a 5 prefix number, short numbers ("3060" and
         "3055") and validly owns French national network and service operator's
         license ("L33-1" and "L34-1") and (b) is the beneficiary of a "regime
         d'annonce" in Switzerland.

2.5      Financial Statements

         The consolidated accounts (and their appendices) as of December 31,
         1998 (hereinafter referred to as the "Financial Statements of the
         Company"), a copy of which is set forth in Appendix 2.5.1, have been
         certified true and correct by the statutory auditors, comply with
         French GAAP and fairly present the assets and liabilities, financial
         situation and results of the Company as of December 31, 1998. In
         addition, the unaudited total revenue, revenue breakdown, and number of
         minutes figures provided with respect to the period beginning on
         January 1, 1999 through and including February 28, 1999, attached as
         Appendix 2.5.2 hereto, fairly represented as of the date thereof, and
         fairly represent as of the date hereof, the total revenue, revenue
         breakdown and number of minutes of the Company.

2.6      Intermediary Period

         Except as set forth on Appendix 2.6., from December 31, 1998 through
         and including the date of execution of this Agreement, (i) the
         management of the Company has been carried out using the same methods
         and in a manner consistent with the former management thereof, so as to
         ensure the continuity of the running of the business, (ii) there has
         been no change in the assets and liabilities (whether accrued,
         absolute, contingent, off balance sheet or otherwise), financial
         situation or results of the Company or of the Subsidiaries of the
         Company constituting or that, with the passage of time, would
         constitute a material adverse impact and (iii) the Company has neither
         declared nor paid a dividend with respect to its common stock.
         Moreover, except as set forth in Appendix 2.6., the 



                                      -14-
   15

         Company has not entered into any agreement or made any decision outside
         the ordinary course of business.

2.7      Taxes

         The Company and the Subsidiaries of the Company have (i) duly filed all
         required tax returns in accordance with the applicable laws and
         regulations and (ii) have paid all taxes which are due and payable,
         other than those presently payable without penalty or interest and
         other than those which are subject of a good faith contest.

2.8      Litigation

         Except as set forth in Appendix 2.8 hereto, neither the Company nor the
         Subsidiaries of the Company are engaged in any judicial, criminal,
         administrative or arbitral proceedings, as plaintiff or defendant, in
         which the claim exceeds on fifteen thousand (15,000) Euros and, to the
         best of the Guarantors' knowledge, no such proceedings have been
         threatened.

2.9      Intellectual Property

         The Company and the Subsidiaries of the Company own or are entitled to
         the exclusive use of all trademarks, trade names, software, domain name
         and more generally all intellectual property rights, if any, that they
         use in the course of their business. None of these rights infringes the
         rights of any party, except to the extent such infringement would not
         have a material adverse effect on the rights of such party. The
         documentation pertaining to trademark and trade names is set forth in
         Appendix 2.9 hereto.

         Except as set forth in Appendix 2.8 hereto, no claims, actions or
         litigation with respect to the aforesaid intellectual property rights
         have been asserted or are, to the Sellers' knowledge, threatened by any
         litigation, arbitration or administrative proceeding the outcome of
         which could reasonably be expected to have a material adverse effect on
         the ownership and use of such intellectual property rights by the
         Company or the Subsidiaries of the Company.

2.10     Lock-up

         As of the date hereof, la Societe du Nouveau Marche ("SNM") has
         expressly released the Sellers from their undertakings not to transfer
         their respective Shares for a three (3) year period starting from the
         date the Company's Shares were listed on the Nouveau Marche.

2.11     Form Contracts

         The unexecuted contracts provided by Sellers to Purchaser for its
         review during the due diligence period do not differ in any material
         respects from the contracts executed and delivered by the Company.



                                      -15-
   16


2.12     Change of Control

         On and after the Transfer Date, all contracts and agreements made
         available to Purchaser to which the Company was a party and which were
         in force prior to the Transfer Date shall continue to be in full force
         and effect in accordance with the terms thereof, except those contracts
         and agreements capable of being terminated of right by the counterparty
         on account of a change in control of the Company and those set forth in
         Appendix 2.12. All material contracts and agreements to which the
         Company is a party have been made available to the Purchaser.

ARTICLE 3.                 FURTHER REPRESENTATIONS AND WARRANTIES OF THE 
                           GUARANTORS

Each of the Guarantors further represents and warrants, but only as to itself
and each of the members of its Group, to the Purchaser that, on the date hereof,
the representations and warranties set forth below are true and correct:

3.1      Power and authority

         Neither the Guarantor nor any member of its Group is subject to any
         contractual or other restriction or impediment which in any way
         restricts his rights or capacity to validly enter into and be bound by
         the terms of this Agreement or on the execution of the agreements to be
         executed by any of the Sellers referenced in Article 1.3(ii)(d)
         (collectively, the "Seller Agreements"), and to carry out all of his
         obligations hereunder and thereunder. Each Guarantor and each member of
         the Guarantors' Group has the full power, authority and capacity to
         enter into and sign this Agreement and the other Seller Agreements.

         Upon execution and delivery of this Agreement and the other Seller
         Agreements by all parties, the Seller Agreements shall be enforceable
         against each Guarantor and each member of its Group in accordance with
         their terms and the obligations of each Guarantor and each member of
         its Group set forth in the Seller Agreements shall be binding on it.

3.2      Ownership of the Shares

         The Shares of each member of the Guarantor's Group are freely
         negotiable and are free from any liens, pledges or other rights
         whatsoever. On the Transfer Date, provided that the Purchaser shall not
         have taken any action adverse to the granting of good and marketable
         title, the Purchaser shall own good and marketable title to the Shares
         and the Shares of each member of the Guarantor's Group, and the Shares
         of each member of the Guarantor's Group shall be free from any liens,
         pledges, or other rights whatsoever.

         The transfer of title of the Shares of the Guarantor's Group does not
         require any administrative or public consent and does not breach any of
         the Sellers' contractual or other obligations and is not contrary to
         any laws or regulations.



                                      -16-
   17


3.3      Securities law

         Each of the Sellers acknowledges that (a) the GTS Shares are not being
         registered under the Securities Act on the ground that the issuance
         thereof is exempt from registration under Section 4(2) of the
         Securities Act as not involving any public offering and (b) GTS's
         reliance on such exemption is predicated in part on the representation
         made to it by the Sellers that each (i) has such knowledge and
         experience in financial and business matters that he is capable of
         evaluating the merits and risks of acquiring the GTS Shares and is
         capable of bearing the economic loss of this entire investment and (ii)
         is acquiring the GTS Shares for investment for his own account with no
         present intention of dividing its participation with others or
         reselling or otherwise distributing the same.

3.4      Disclaimer

         The Purchaser hereby acknowledges that, except as expressly set forth
         in Articles 2 and 3, the Guarantors make no representations or
         warranties with respect to the subject matter of this transaction,
         including, without limiting the foregoing, any representations or
         warranties with respect to the information contained in the data room.

ARTICLE 4.                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

The Purchaser represents and warrants to each of the Sellers on the date hereof,
as follows:

4.1      Organization of the Purchaser

         The Purchaser is a corporation duly organized and validly existing
         under the laws of the jurisdiction of its incorporation and has all
         necessary corporate power and authority to own, operate and lease its
         properties and to conduct its business as presently conducted.

         The Purchaser has not ceased making payments to creditors nor is it
         insolvent or unable to pay its debts.

4.2      Power and authority

         Neither the Purchaser nor GTS is subject to any contractual or other
         restriction or impediment which in any way restricts its rights or
         capacity to validly enter into and be bound by the terms of this
         Agreement and, on the execution of the agreements to be executed by
         Purchaser or GTS referenced in Article 1.3(ii)(b) and (c)
         (collectively, with this Agreement, the "Purchaser Agreements"), and to
         carry out all of his obligations hereunder and thereunder. The
         Purchaser and GTS have the full power, authority and capacity to enter
         into and sign the Purchaser Agreements. Upon the execution and delivery
         of the Purchaser Agreements by all parties, the Purchaser Agreements
         shall be enforceable against the Purchaser, and all provisions
         specifically applicable to GTS shall be enforceable against GTS, in
         accordance with their terms and the obligations of each of the
         Purchaser and GTS shall be binding upon it.



                                      -17-
   18

4.3      Disclosure

         GTS has made public disclosure of all material information with respect
         to GTS in accordance with applicable SEC rules and regulations.

4.4      Disclaimer

         Sellers hereby acknowledge that, except as expressly set forth in
         Article 4, Purchaser makes no representation or warranty with respect
         to the subject matter of this transaction.

ARTICLE 5.                 REPRESENTATION AND WARRANTY OF GTS

GTS represents and warrants to each of the Sellers, as of the date hereof, the
following:

5.1      Title

         On the Transfer Date, provided that the Sellers shall not have taken
         any action adverse to the granting of good and/or marketable title to
         the GTS Shares, the Sellers shall have good title to the GTS Shares
         and, subject to the terms of the Registration Rights Agreement and U.S.
         securities laws, marketable title to the GTS Shares and GTS shall
         indemnify the Sellers in the event GTS breaches this representation.

5.2      Disclaimer

         Seller hereby acknowledges that, except as expressly set forth in
         Article 5, GTS makes no representation or warranty with respect to the
         subject matter of this transaction.

ARTICLE 6.                 INDEMNIFICATION

6.1      Indemnification obligation

         (i)      Subject to the terms and conditions set forth hereafter and
                  provided for herein, each Guarantor hereby undertakes,
                  severally and not jointly ("responsabilite conjointe et
                  non-solidaire") (the "Purchaser Indemnity") to indemnify and
                  pay:

         (a)      100% of any direct and non-contingent and liquidated damages
                  incurred and paid for by the Purchaser including, without
                  limitation, amounts related to any claim, action, proceeding,
                  litigation or similar actions (including reasonable attorneys'
                  fees and expenses) as a result of the breach or violation of,
                  a misstatement in, an omission with respect to, any
                  representations and warranties by such Guarantor set forth in
                  Article 3 of this Agreement;




                                      -18-
   19

         (b)      an amount corresponding to its Guarantor Percentage of 100% of
                  any direct and non-contingent and liquidated damages incurred
                  and paid for by the Purchaser including, without limitation,
                  amounts related to any claim, action, proceeding, litigation
                  or similar actions (including reasonable attorneys' fees and
                  expenses) as a result of litigation pending before the
                  Tribunal de Commerce de Nanterre with respect to Intrad Inc.;
                  and

         (c)      an amount corresponding to its Guarantor Percentage of 100% of
                  any direct and non-contingent liquidated damage actually
                  incurred and paid for by the Company or any Subsidiaries of
                  the Company as a result of the breach of, a misstatement in,
                  an omission with respect to, any warranty or representation
                  set forth in Article 2 of this Agreement including, without
                  limitation, amounts related to any claim, action, proceeding,
                  litigation or similar actions (including reasonable attorneys'
                  fees and expenses) with respect to facts in existence before
                  the date hereof,.

         The amount of any Purchaser Loss or Intrad Loss (each as defined below)
         under Article 6.1(i)(b) or (c) shall be reduced by

         - any increase in the value of any of the Company's assets, including
         the amount of any provisions which are recovered ("reprise sur
         provisions") and/or decrease of any of the Company's liabilities
         appearing prior to 31 December 1998 compared to their respective value
         accounted for in the Financial Statements of the Company;

         - the amount of any tax savings, including the increase of the loss
         carried forward, or any benefit accrued to the Company in connection
         with the recording of such Purchaser Loss or Intrad Loss.

         - any amount payable by a third party including (a) any payments due to
         the Company by an insurance company to indemnify the Company for such
         Purchaser Loss or Intrad Loss and (b) any indemnification obligation of
         any third party to the Company. In the event that any Purchaser Loss or
         Intrad Loss may be covered by insurance or indemnified by a third
         pursuant to an indemnity, the Purchaser shall not have any right to
         Purchaser Indemnity until the Purchaser shall have exhausted all
         insurance claims or claims for indemnification that may exist against
         any such third party, and

         - the amount of any provision or reserve relating to the Purchaser Loss
         or Intrad Loss as recorded in the Financial Statements of the Company.

         (ii)     Subject to the terms and conditions set forth hereafter and
                  provided for herein, the Purchaser hereby undertakes to
                  indemnify and pay to the Sellers (the "Seller Indemnity"),
                  100% of any direct non-contingent and liquidated damages
                  incurred and paid for by the Sellers as a result of the breach
                  or violation of a misstatement in, an omission with respect
                  to, representations and warranties set forth in Article 4 of
                  this Agreement, including, without limitation, amounts related
                  to any claim, 



                                      -19-
   20

                  action, proceeding, litigation or similar actions (including
                  reasonable attorneys' fees and expenses).

         (iii)    For the purposes of this Article 6, any amount referenced to
                  in Article 6.1(i)(a) and 6.1(i)(c) shall be referred to as a
                  "Purchaser Loss" , any amount referenced in Article 6.1(i)(b)
                  shall be referred to as an "Intrad Loss", and any amount
                  referenced in Article 6.1(ii) shall be referred to as a
                  "Seller Loss."

6.2      Limitation and mitigation of liability

         (i)      Guarantors' liability

                  For the purposes of this Article 6, it is understood that:

                  (a)      the Purchaser shall undertake to mitigate or reduce
                           all claims which could give rise to Guarantors'
                           liability under this Agreement. Purchaser Losses that
                           have been incurred as a result of the Purchaser's
                           failure to use its bests efforts to mitigate such
                           Purchaser Losses shall not be taken into
                           consideration;

                  (b)      a Purchaser Loss that results from a change in the
                           laws, regulations, interpretations or practices
                           applicable to the Company with effect after the date
                           hereof shall not give rise to the payment of a
                           Sellers Indemnity;

                  (c)      with respect to Purchaser Losses resulting from
                           claims made by third parties, only the amount which
                           has been definitively and finally determined and paid
                           according to a final, non-appealable and binding
                           decision of any competent court, arbitral tribunal or
                           administrative authority shall be taken into account
                           for the calculation of the Sellers Indemnity;

                  (d)      the Guarantors shall not be liable with respect to a
                           claim for any Purchaser Loss to the extent that such
                           Purchaser Loss is actually recovered by the Purchaser
                           from any third party (including insurance companies)
                           or could have been recovered by the Purchaser had the
                           Purchaser used its best efforts to mitigate such
                           Purchaser Loss;

                  (e)      the Purchaser shall not be entitled to recover
                           damages for any misrepresentation or for the breach
                           of any of the representations and warranties under
                           Articles 2 and 3 or otherwise obtain reimbursement or
                           restitution more than once in respect of the same
                           facts or matters giving rise to such
                           misrepresentation or breach;



                                      -20-
   21

                  (f)      no warranty in favor of the Purchaser, whether
                           statutory or contractual, other that those contained
                           in this Agreement, may be invoked by the Purchaser
                           against the Guarantors;

                  (g)      Purchaser Losses that only result in (a) a charge
                           being deferred (including but not limited to the
                           following, a reassessment by the relevant authorities
                           of depreciation allowances or reserves), (b) a profit
                           being deferred from one tax year to another or (c) a
                           tax credit being imputable will not be taken into
                           account for the calculation of the Sellers Indemnity;

                  (h)      the Purchaser shall not be entitled to recover any
                           Purchaser Loss or Losses for any misrepresentation
                           and/or for any breach of any of the representations
                           and warranties or otherwise obtain any reimbursement
                           or restitution in respect of any information which is
                           accurately disclosed in this Agreement and any
                           Appendices hereto. For the avoidance of doubt, any
                           disclosure made with respect to any representation of
                           warranty made by the Guarantors hereunder shall apply
                           to all other representations and warranties as if
                           such disclosure was specifically made in respect
                           thereof;

                  (i)      the Purchaser represents that it is not aware, at the
                           date of this Agreement, of any matter which could
                           give rise to a claim against the Guarantors.

                  The provisions of this Article 6.2 (i) shall not be applicable
                  to Purchaser Loss resulting from any misrepresentation and/or
                  for any breach of the representations and warranties set forth
                  in Article 3.

         (ii)     Liability of Purchaser

                  For the purposes of this Article 6, it is understood that:

                  (a)      the Guarantors undertake to mitigate or reduce all
                           claims which could give rise to Purchaser's or GTS's
                           liability under this Agreement. Only Seller Losses in
                           excess of Seller Losses that would have been incurred
                           as a result of the Guarantors' failure to use their
                           respective best efforts to mitigate such Seller
                           Losses shall not be taken into consideration;

                  (b)      a Seller Loss that results from a change in the laws,
                           regulations, interpretations or practices applicable
                           to the Purchaser or GTS with effect after the date
                           hereof shall not give rise to the payment of the
                           Seller Indemnity;

                  (c)      with respect to Seller Losses resulting from claims
                           made by third parties, only the amount which has been
                           definitively and finally determined and paid
                           according to a final, non-appealable and binding
                           decision of any 



                                      -21-
   22

                           competent court, arbitral tribunal or administrative
                           authority shall be taken into account for the
                           calculation of the Indemnity;

                  (d)      neither the Purchaser nor GTS shall be liable with
                           respect to a claim for any Seller Loss to the extent
                           that such Seller Loss is actually recovered by the
                           Guarantors from any third party (including insurance
                           companies) or could have been recovered by the
                           Guarantors had the Guarantors used their best efforts
                           to mitigate such Seller Loss;

                  (e)      the Guarantors shall not be entitled to recover
                           damages for any misrepresentation or for the breach
                           of any of the representations and warranties under
                           Articles 4 and 5 or otherwise obtain reimbursement or
                           restitution more than once in respect of the same
                           facts or matters giving rise to such
                           misrepresentation or breach;

                  (f)      no warranty in favor of the Guarantor, other than
                           those contained in this Agreement, may be invoked by
                           the Guarantor against the Purchaser;

                  (g)      Seller Losses that only result in (a) a charge being
                           deferred (including but not limited to the following,
                           a reassessment by the relevant authorities of
                           depreciation allowances or reserves), (b) a profit
                           being deferred from one tax year to another or (c) a
                           tax credit being imputable will not be taken into
                           account for the calculation of the Indemnity;

                  (h)      the Guarantors shall not be entitled to recover any
                           Seller Loss or Losses for any misrepresentation
                           and/or for any breach of any of the representations
                           and warranties or otherwise obtain any reimbursement
                           or restitution in respect of any information which is
                           accurately disclosed in this Agreement and any
                           Appendixes hereto;

                  (i)      the Guarantors shall not be entitled to recover any
                           Seller Loss or Losses for any misrepresentation
                           and/or for any breach of any of the representations
                           and warranties or otherwise obtain any reimbursement
                           or restitution in respect of any information which is
                           accurately disclosed in this Agreement and any
                           Appendices hereto. For the avoidance of doubt, any
                           disclosure made with respect to any representation or
                           warranty made by the Purchaser hereunder shall apply
                           to all other representations and warranties as if
                           such disclosure was specifically made in respect
                           thereof;

The provisions of this Article 6.2 (ii) shall not be applicable to Seller Loss
resulting from any misrepresentation and/or for any breach of the
representations and warranties set forth in Articles 4.1, 4.2, and 5.



                                      -22-
   23


6.3      Notification by the Purchaser

         Within thirty (30) days of the occurrence of any event which shall give
         rise to a Purchaser Loss or Intrad Loss under the terms of the
         Agreement, but the amount of which has not been definitively and
         finally determined as provided for in Article 6.1 (i) of this
         Agreement, such event shall be notified to the representative of the
         Guarantors (except for Purchaser Loss or Intrad Losses relating to
         taxes and social security, for which such delay shall be reduced to ten
         (10) days after receipt of written notification from the relevant
         government authority) (hereinafter the "Notice").

         The Notice shall contain the details which are required for the
         application of Article 6.4 hereinafter.

6.4      Procedures in case of litigation

         In the event a written claim or proceeding is initiated by a third
         person against the Company with respect to which it is reasonably
         foreseeable that such claim or proceeding would result in a breach of
         Article 2 or Article 3, the Purchaser shall use and cause the Company
         to use its best efforts to provide the representative of the Guarantors
         with such information and/or documents as are reasonably necessary to
         keep the Guarantors informed of all material, non-confidential matters
         relating to the progress of such claim or proceeding. During the
         proceeding, the Guarantors shall be authorized to advise the Purchaser
         and the Purchaser is required to follow such advice at the sole cost
         and expense of the Guarantors unless, in the reasonable opinion of the
         Purchaser, such advice is unreasonable or would compromise any defense.

         Any claim made by or against a third party with respect to the
         litigation shall not be settled or compromised without the prior
         written approval of the representative of the Guarantors which approval
         shall not be unreasonably withheld.

6.5      Threshold applicable to each claim and deductible

         (i)      Threshold.

                  (a) Purchaser Indemnity. If any Purchaser Indemnity is less
                  than fifteen thousand (15,000) Euros, then such Guarantors
                  shall not have have any indemnification obligation with
                  respect to the Purchaser. (b) Seller Indemnity. If any Seller
                  Indemnity is less than fifteen thousand (15,000) Euros, then
                  the Purchaser shall not have any indemnification obligation
                  with respect to the Guarantors.

         (ii)     Deductible.

                  (a) Purchaser Indemnity. The indemnification obligation of
                  each Guarantor with respect to a Purchaser Indemnity shall
                  only exist when and to the extent that the aggregate amount of
                  Purchaser Indemnities (m) are notified by the Purchaser to 



                                      -23-
   24

                  the Guarantors pursuant to this Article 6 and (n) exceed for
                  each Guarantor its Guarantor Percentage of one million
                  (1,000,000) Euros.

                  (b) Seller Indemnity. The indemnification obligation of the
                  Purchaser with respect to a Seller Indemnity shall only exist
                  when and to the extent that the aggregate amount of Seller
                  Indemnities exceed for the Guarantors one million (1,000,000)
                  Euros.

                  (c) Intrad Loss. The indemnification obligations of each
                  Guarantor with respect to an Intrad Loss shall only exist when
                  and to the extent that the aggregate amount of the Intrad Loss
                  exceeds for each Guarantor its Guarantor Percentage of one
                  hundred fifty thousand (150,000) Euros. Any Intrad Loss in
                  excess of one hundred fifty thousand (150,000) Euros shall be
                  applied against the deductible set forth in Article
                  6.5(ii)(a).

6.6      Maximum amount of Indemnity

         (i)      Purchaser Indemnity. The total amount of all sums that may be
                  due and payable to the Purchaser by a Guarantor pursuant to
                  all claims for Purchaser Indemnity notified by the Purchaser
                  pursuant to Article 6 of this Agreement shall in no event
                  exceed for each Guarantor its Guarantor Percentage of the
                  value of (a) the Escrowed Shares as such value may increase or
                  decrease on and after the Transfer Date for Purchaser
                  Indemnities resulting from a misrepresentation and/or from a
                  breach of the representations and warranties set forth in
                  Article 2, and (b) the aggregate purchase price for Purchaser
                  Indemnities resulting from a misrepresentation and/or from a
                  breach of the representations and warranties set forth in
                  Article 3. The Purchaser acknowledges and agrees that it
                  solely shall have recourse to the Escrowed Shares and to no
                  other assets of the Sellers with respect to any Purchaser
                  Indemnity.

         (ii)     Seller Indemnity. The total amount of all sums that may be due
                  and payable to the Guarantors by the Purchaser or GTS pursuant
                  to all claims for Sellers Indemnity notified by the
                  representative of the Guarantors pursuant to Article 6 of this
                  Agreement shall in no event exceed the aggregate purchase
                  price for Seller Indemnities resulting from a
                  misrepresentation and/or from a breach of the representations
                  and warranties set forth in Articles 4 or 5.

6.7      Claim for Indemnity

         (i)      Within thirty (30) days of the determination of the amount of
                  a Purchaser Indemnity, the Purchaser shall notify Escrow Agent
                  of the Purchaser Indemnity.

                  The Guarantors shall pay the Purchaser Indemnity to the
                  Purchaser, within thirty (30) days of the date the Guarantors
                  and the Purchaser agree in writing on the amount of such
                  Purchaser Indemnity or, in the event the Guarantors and the



                                      -24-
   25

                  Purchaser fail to reach a written agreement, the date on which
                  a competent court or arbitral tribunal has, in a final,
                  non-appealable and binding decision, determined the amount of
                  such Purchaser Indemnity. Pursuant to the terms of the Escrow
                  Agreement, the Purchaser may seek payment of the Purchaser
                  Indemnity.

         (ii)     The Purchaser shall pay the Sellers Indemnity to the Sellers,
                  within thirty (30) days of the date the Sellers and the
                  Purchaser agree in writing on the amount of the Indemnity or,
                  in the event the Guarantors and the Purchaser fail to reach a
                  written agreement, the date on which a competent court or
                  arbitral tribunal has, in a final, non-appealable and binding
                  decision, determined the amount of such Indemnity.

6.8      Expiration Date

         The representations and warranties made by the Sellers, Guarantors, and
         the Purchaser hereunder shall remain in full force and effect until 30
         June 2000 (the "Expiration Date"), provided however that the
         representations and warranties set forth in Articles 3 and 5 will
         remain in full force and effect five (5) years after the Expiration
         Date.

         Only Notices received by the appropriate party hereto prior to the
         Expiration Date shall give rise to a Purchaser Indemnity or a Sellers
         Indemnity under the terms and conditions of Article 6 of this
         Agreement.

         As an exception to the aforesaid, all claims for Purchaser Indemnity or
         for Sellers Indemnity in relation to tax matters may be validly
         notified up to one (1) month after the expiry of the statute of
         limitations applicable to the facts or actions in question.

ARTICLE 7.                 COMPLIANCE BY PURCHASER WITH STOCK EXCHANGE 
                           REGULATIONS

The Purchaser shall, as soon as practicable after the execution of this
Agreement, file with the Conseil des Marche Financiers (the "CMF") an Offer to
purchase all of the remaining shares of the Company and the Company's
convertible bonds.

ARTICLE 8.                 UNDERTAKINGS OF GTS TO REGISTER GTS SHARES

GTS hereby undertakes to file in order to register the GTS Shares owned by the
Sellers with the SEC in a reasonable period of time but no later than October 1,
1999 pursuant to a registration rights agreement (the "Registration Rights
Agreement") to be negotiated by the parties in good faith before the Transfer
Date.

GTS hereby undertakes, that in the event unregistered shares of GTS are issued
as a result of an exercise of any of the GTS stock options granted to Company
employees pursuant to this Agreement, to include such unregistered shares in the
immediately succeeding Form S-8 Registration Statement filed with the SEC in
which such inclusion is possible.



                                      -25-
   26

ARTICLE 9.                 ACKNOWLEDGMENT AND UNDERTAKINGS OF THE PURCHASER WITH
                           REGARDS TO THE STOCK OPTION PLAN AND OF GTS WITH 
                           REGARDS TO EMPLOYEE BENEFITS

The Purchaser acknowledges that the Stock Option Plan has been amended prior to
the execution of this Agreement to provide that the vesting period has been
reduced to one (1) year, although the stock options may not be exercised before
two (2) years after the granting thereof. Purchaser further undertakes not to
amend the Stock Option Plan as it exists as of the date of execution of this
Agreement and to permit the conversion of options in the Company to options on
GTS Shares.

GTS undertakes to implement and to cause the Company to implement, as soon as
reasonably practicable, after the Transfer Date, the provisions of the term
sheet (the "Retention Plan") which is annexed hereto as Appendix 9.

ARTICLE 10.                UNDERTAKINGS OF THE PURCHASER WITH REGARDS TO FRENCH
                           REGULATIONS

The Purchaser hereby (i) acknowledges the undertakings set forth in Appendix 10
hereto which have been taken by the Company as a condition to the granting by
the Autorite de Regulation des Telecommunications of (a) the authorization to
use the 5 prefix and (b) the network and service operator's license ("L33-1" and
"L34-1"), and (ii) undertakes to fully and unconditionally comply with all such
undertakings.

ARTICLE 11.                UNDERTAKINGS OF THE FOUNDERS

11.1     Each of Mr. Nicolazzi, Mr. Martenne-Duplan and Mr. Ait Yahia agree to
         (a) continue as Company board members for a term as mutually agreed
         upon and (b) enter into the consultancy agreements (the "Consultancy
         Agreements") substantially in the form of the agreements annexed hereto
         as Appendix 11.

11.2     For a two (2) year period starting from the Transfer Date, each of the
         Founders undertakes not to associate himself with, or collaborate in,
         directly or indirectly, in France, Italy, Spain or Switzerland, any
         activity, enterprise or company having activities similar or identical
         to the activity of the Company or contemplated by the Company as of the
         Transfer Date, including, without limitation, any activity encompassing
         the provision of internet services or goods. For clarification
         purposes, such undertaking shall include but not be limited to (i)
         incorporating a company, (ii) obtaining at least a five per cent (5%)
         share or voting participation (excluding existing ones) in, or
         modifying the activity of, an existing company, or (iii) becoming a
         director, employee, representative of, or consultant for, such company.




                                      -26-
   27

11.3     For a two (2) year period starting from the Transfer Date, each of the
         Founders undertakes not to solicit, directly or indirectly, or entice
         or endeavor to solicit or entice away from employment with the
         Purchaser or an affiliate of the Purchaser, the Company or any
         Subsidiary of the Company any person employed thereby as an employee,
         director, representative, consultant unless the prior written approval
         of the Purchaser has been obtained.

11.4     Each of the Founders undertakes to use his best efforts to assist
         Purchaser in the successful purchase of all of the shares of the
         Company and the Company's convertible bonds.

ARTICLE 12.                CONFIDENTIALITY AND ANNOUNCEMENTS

12.1     Each party, undertakes to keep confidential and to cause its directors,
         employees and representatives to keep confidential all information of
         any kind whatsoever obtained pursuant to this Agreement or relating to
         the transactions hereto. Each party undertakes not to disclose such
         information to any third party without the prior written approval of
         the other parties hereto, unless it is ordered to do so by law or by a
         decision or a judgment rendered by a competent court, and in which case
         the party concerned shall notify the other parties hereto before
         disclosing said information.

12.2     Notwithstanding the provisions contained in Article 12.1 above, the
         Purchaser shall be authorized to disclose this Agreement in order to
         implement the Offer, including to disclose this Agreement to the CMF.
         The form and the contents of such disclosure shall be subject to the
         prior written approval of the representative of the Guarantors, which
         approval shall not be unreasonably withheld. The Purchaser and the
         Founders jointly shall issue any press release(s) with respect to this
         Agreement and the transactions contemplated hereby.

ARTICLE 13.                GUARANTORS' REPRESENTATIVE

The Guarantors hereby agree to appoint Mr. Alan Nicolazzi as the representative
of the Guarantors for the purposes of this Agreement. The Guarantors have the
right to appoint someone other than Mr. Nicolazzi or replace Mr. Nicolazzi,
provided that they notify the Purchaser in writing.

ARTICLE 14.       ACKNOWLEDGMENT OF THE PURCHASER

As of December 31, 1998, the value of the equity of the Company was less than
half of the issued capital of the Company, entailing the obligation of the
Purchaser (assuming the occurrence of the Transfer Date) to augment the value of
the equity of the Company up to half of the issued capital or to wind up the
Company.




                                      -27-
   28

ARTICLE 15.       MISCELLANEOUS

15.1     Notices

         All notices, claims and other communications made as a result of this
         Agreement shall be sent by certified letter, return receipt requested,
         or by facsimile or telex confirmed by certified letter, to the
         addresses set forth on the signatures pages of this Agreement, which
         addresses may be amended at any time by delivery to all parties hereto
         a written change of address notification.

         The date of receipt of the notice or communication shall be the date of
         receipt of the certified letter, return receipt requested.

15.2     Appendixes and Recitals

         All of the Appendixes and recitals of this Agreement constitute an
         integral part hereof and together form a single, indivisible whole.

15.3     Entire Agreement

         This Agreement constitute and express the entire understanding of the
         parties hereto with regard to the subject matter contained herein and,
         save for the confidentiality agreement executed as of February 25,
         1999, the confidentiality letters executed as of March 31, 1999 and the
         data room guides executed by representatives of the Purchaser and its
         advisors, supersedes all prior and contemporaneous contracts,
         agreements, negotiations, understandings and drafts entered into by the
         parties for the same subject matter. With respect to the
         above-mentioned confidentiality agreements, confidentiality letters,
         any restrictions on the trading of securities contained therein hereby
         is deemed to be of no further force or effect as of the Transfer Date.

15.4     Amendments and modifications

         No amendment or modification of this Agreement shall be valid unless
         made in writing and signed by all of the parties hereto. No waiver of
         any provision hereof shall be valid unless it is in writing and signed
         by the parties hereto.

15.5     Assignment

         No assignment by one of the Parties of all or any of its rights or
         obligations hereunder shall be authorized without the prior written
         consent of all the other parties hereto.

15.6     Applicable law

         This agreement shall be governed by, and construed in accordance with,
         the laws of the Republic of France.



                                      -28-
   29

15.7     Arbitration

         (a)      Resolution of Disputes by Arbitration. All disputes,
                  controversies or claims arising out of, in relation to, or in
                  connection with this Agreement or the validity,
                  interpretation, performance or breach thereof, shall be
                  finally settled by ad hoc arbitration, to be conducted as set
                  forth below.

         (b)      Conduct of Arbitration. The arbitration shall be conducted as
                  provided by this Article and in accordance with the Rules of
                  Conciliation and Arbitration of the International Chamber of
                  Commerce then in effect (currently as set forth in ICC
                  Publication No. 447, revised and in force from January 1,
                  1988), except that, in the event of any conflict between those
                  rules and the arbitration provisions of this Agreement, the
                  provisions of this Agreement shall govern. The arbitration
                  shall be conducted in accordance with the following
                  procedures:

                  (i)      A party seeking arbitration shall deliver to the
                           other parties and to the Company a written notice of
                           an arbitral claim (an "Arbitration Notice").

                  (ii)     The number of arbitrators shall be either one, if the
                           Purchaser and the Sellers mutually select an
                           arbitrator within fifteen (15) days after receipt of
                           an Arbitration Notice or three (3) arbitrators if the
                           Purchaser and Sellers are unable mutually to select
                           one (1) arbitrator. In the event the parties are
                           unable mutually to select one arbitrator in
                           accordance with this Article, the Sellers shall
                           appoint one (1) arbitrator and the Purchaser shall
                           appoint one (1) arbitrator, with the appointed
                           arbitrators mutually to select the third arbitrator.
                           If, within thirty (30) days after the delivery of the
                           Arbitration Notice, the Sellers shall not have
                           appointed one (1) arbitrator, or the Purchaser shall
                           not have appointed one (1) arbitrator, or the two
                           arbitrators shall not have selected a third
                           arbitrator, each as contemplated above, then the
                           second and/or third arbitrator (or, if applicable,
                           all arbitrators) shall be appointed by the
                           International Chamber of Commerce within thirty (30)
                           days thereafter from the list of arbitrators of the
                           International Chamber of Commerce.

                  (iii)    If any arbitrator is unable to perform his duties as
                           a member of the tribunal due to death, resignation,
                           refusal or incompetence, the vacancy shall be filled
                           by the same procedure by which the non-performing
                           arbitrator was appointed.

                  (iv)     The languages used in arbitration, including the
                           language of the proceedings, the language of the
                           award and the reasons supporting it, shall be English
                           or French.

                  (v)      The place of the arbitration shall be Paris, France.




                                      -29-
   30

         Executed in Paris
         This 14th day of  April, 1999

         In  15 counterparts


                                               THE SELLERS


         By:                                   /s/ ALAIN NICOLAZZI
                                               ---------------------------------
         Name:                                 Mr. Alain Nicolazzi

         Address:
         23, rue des Moulins
         78290 Croissy sur Seine
         France


                                               NICOM INVESTISSEMENTS


         By:                                   /s/ ALAIN NICOLAZZI
                                               ---------------------------------
         Name:                                 Mr. Alain Nicolazzi
         Title:                                Gerant

         Address:
         23, rue des Moulins
         78290 Croissy sur Seine
         France


         By:                                   /s/ MARIE NICOLAZZI
                                               ---------------------------------
         Name:                                 Ms. Marie Nicolazzi

         Address:
         23, rue des Moulins
         78290 Croissy sur Seine
         France


         By:                                   /s/ CAMILLE NICOLAZZI
                                               ---------------------------------
         Name:                                 Ms. Camille Nicolazzi

         Address:
         23, rue des Moulins
         78290 Croissy sur Seine
         France


         By:                                   /s/ REMI NICOLAZZI
                                               ---------------------------------
         Name:                                 Mr. Remi Nicolazzi



                                      -30-
   31

         Address:
         23, rue des Moulins
         78290 Croissy sur Seine
         France


         By:                                   /s/ FLORENT MARTENNE-DUPLAN
                                               ---------------------------------
         Name:                                 Mr. Florent Martenne-Duplan

         Address:
         12, villa Memoris
         94120 Fontenay sous Bois
         France
                                               FINANCIERE DU MARAIS


         By:                                   /s/ FLORENT MARTENNE-DUPLAN
                                               ---------------------------------
         Name:                                 Mr. Florent Martenne-Duplan
         Title:                                Gerant

         Address:
         12, villa Memoris
         94120 Fontenay sous Bois
         France


         By:                                   /s/ SEBASTIEN MARTENNE-DUPLAN
                                               ---------------------------------
         Name:                                 Mr. Sebastien Martenne-Duplan

         Address:
         12, villa Memoris
         94120 Fontenay sous Bois
         France



                                      -31-
   32

         By:                                   /s/ ANTONIN MARTENNE-DUPLAN
                                               ---------------------------------
         Name:                                 Mr. Antonin Martenne-Duplan

         Address:
         12, villa Memoris
         94120 Fontenay sous Bois
         France


         By:                                   /s/ MAGALI MARTENNE-DUPLAN   
                                               ---------------------------------
         Name:                                 Ms. Magali Martenne-Duplan

         Address:
         12, villa Memoris
         94120 Fontenay sous Bois
         France


         By:                                   /s/ PHILIPPE AIT YAHIA
                                               ---------------------------------
         Name:                                 Mr. Philippe Ait Yahia

         Address:
         21, rue des Hauts Closeaux
         92310 Sevres
         France
                                               HESPERIA

         By:                                   /s/ PHILIPPE AIT YAHIA
                                               ---------------------------------
         Name:                                 Mr. Philippe Ait Yahia
         Title:                                Gerant

         Address:
         21, rue des Hauts Closeaux
         92310 Sevres
         France


         By:                                   /s/ SAMUEL AIT YAHIA
                                               ---------------------------------
         Name:                                 Mr. Samuel Ait Yahia

         Address:
         21, rue des Hauts Closeaux
         92310 Sevres
         France



                                      -32-
   33


                                  THE PURCHASER




                                               ESPRIT TELECOM HOLDINGS, LIMITED

         By:                                   /s/ ROBERT SCHRIESHEIM 
                                               ---------------------------------
         Name:                                 Mr. Robert Schriesheim
         Title:                                Its authorized representative




                                               GTS

                                               GLOBAL TELESYSTEMS GROUP, INC.

         By:                                   /s/ ROBERT SCHREISHEIM
                                               ---------------------------------
         Name:                                 Mr. Robert Schriesheim
         Title:                                Executive Vice President &
                                               Corporation Development Office



                                      -33-