PRIMUS TELECOMMUNICATIONS GROUP INC
8-K, 1999-07-14
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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<PAGE>

                      SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

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



       Date of Report (Date of earliest event reported): June 30, 1999


                 PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED
                         -----------------------------
                (Exact name of issuer as specified in charter)


       Delaware                   0-29092                54-1708481
(State or Other Jurisdiction    (Commission           (I.R.S. Employer
    of Incorporation)           File Number)          Identification No.)

                              1700 Old Meadow Road
                            McLean, Virginia  22102
                    (Address of principal executive offices)

                                 (703) 902-2800
              (Registrant's telephone number, including area code)
<PAGE>

ITEM 2.   ACQUISITION OR DISPOSITION OF ASSETS
          ------------------------------------

          On June 30, 1999 (the "Closing Date"), Primus Telecommunications
Group, Incorporated (the "Company") purchased certain of the assets and assumed
certain obligations of Telegroup, Inc., an Iowa corporation ("Telegroup") and a
chapter 11 bankruptcy debtor under Case No. 99-31527 lodged on the docket of the
United States Bankruptcy Court for the District of New Jersey (the "Bankruptcy
Court"), and all of the outstanding capital stock of certain of Telegroup's
subsidiaries (the "Purchased Subsidiaries").  The purchase consisted of a
combined asset and stock purchase transaction (the "Acquisition") pursuant to an
Asset and Stock Purchase Agreement dated as of the Closing Date by and between
the Company and Telegroup (the "Agreement"), and was effected in accordance with
the terms of the Bankruptcy Court's Order Approving the Sale of Certain of
Debtor's Assets and Granting Relief entered on June 25, 1999. The Acquisition
has an effective date of June 1, 1999.  As a result, financial results of the
acquired business will be included in the Company's results commencing June 1,
1999.  Pursuant to the terms of the Agreement, the Company designated certain of
its subsidiaries as the entities which will receive and take title to the
purchased assets and the purchased capital stock of the Purchased Subsidiaries.

          The total consideration of $97,528,597 (the "Purchase Price") paid
pursuant to the Agreement was negotiated at arms-length following the completion
of and consisted with a bankruptcy auction proceeding conducted before the
Bankruptcy Court and included payments of $1,737,488 for certain working capital
and $18,368,025 for certain accounts receivable. The Purchase Price is subject
to adjustment based on the results of the Company's auditors' review. The
Company paid the Purchase Price as follows: (1) with $45,467,000 in the
aggregate principal amount of the Company's 11 1/4% Senior Notes due 2009 (the
"PTGI Note"); (2) with a promissory note in the principal amount of $4,592,006
evidencing the Company's obligation to pay for certain of Telegroup's accounts
receivable; and (3) with the balance of the Purchase Price paid in cash.  The
PTGI Note was issued pursuant to an Indenture, dated as of January 29, 1999, by
and between the Company and First Union National Bank (the "Trustee"), as the
same was supplemented by that certain First Supplemental Indenture, dated June
30, 1999, by and between the Company and the Trustee (collectively, the
"Indenture").  The Company has agreed to cause a registration statement with
respect to the resale of the PTGI Note to become effective within one hundred
twenty (120) days after the Closing Date.  The Company used internal funds to
pay the cash balance of the Purchase Price and expenses related to the
Acquisition.

          In accordance with the terms of an Amended and Restated Escrow
Agreement dated as of June 30, 1999, by and among the Company, Telegroup and IBJ
Whitehall Bank & Trust Company as escrow agent (the "Escrow Agreement"), (1)
$372,875 of the Purchase Price is being held in escrow, which amount will be
delivered to Telegroup Hong Kong Ltd. (Telegroup's Hong Kong subsidiary) if and
when the acquisition by the Company of certain of Telegroup Hong Kong Ltd.'s
assets is finalized; (2) $733,910 of the Purchase Price is being held in escrow,
which amount will be disbursed to either the Company or Telegroup, as the case
may be, depending on the results of the post-closing review of Telegroup's
working capital calculations;

                                      -2-
<PAGE>

and (3) $30,000 of the Purchase Price is being held in escrow and will remain
available for 60 days from the Closing Date (unless distributed before that time
in accordance with the terms of the Escrow Agreement) to secure certain of
Telegroup's indemnification obligations to the Company, all as more fully set
forth in the Agreement and Escrow Agreement.

          In the transaction, the Company acquired Telegroup's global retail
customer business, which consists of approximately 350,000 retail customers, two
(2) carrier grade switches (one in the New York area and one in London), 14
switching platforms and POPs located in the United Kingdom, Germany, France, The
Netherlands, Denmark, Switzerland, Italy, Japan and Hong Kong, Telegroup's
global network of sales agents, a Web-based order-entry and provisioning system
for agents, a global network operations center and call center equipment,
certain intellectual property rights, certain working capital and accounts
receivable, and rights with respect to certain carrier and provider contracts
and other intangibles.  The Company intends to use these assets and the
Purchased Subsidiaries to continue the businesses described below.

          Telegroup, headquartered in Fairfield, Iowa, with switching facilities
in the New York area, the State of Washington, the State of California and the
State of Florida, and the Purchased Subsidiaries, with offices in United
Kingdom, France, Switzerland, Denmark, The Netherlands, Italy, Germany, South
Africa and Japan, are engaged in the business of providing retail and wholesale
international and domestic telecommunications services, including long distance
and call reorigination services, to approximately 350,000 retail customers
located primarily in the United States and Europe.


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

     (a)  Financial Statements of Business Acquired.

          It is impracticable to provide the financial statements required
          relative to the acquired businesses described in Item 2 at the time
          this Report on Form 8-K is filed. The Registrant will file the
          required financial statements as soon as practicable, but in no event
          later than September 13, 1999.

     (b)  Pro Forma Financial Information.

          It is impracticable to provide the pro forma financial information
          required relative to the acquired businesses described in Item 2 at
          the time this Report on Form 8-K is filed. The Registrant will file
          the required pro forma financial information as soon as practicable,
          but in no event later than September 13, 1999.


     (c)  Exhibits.

                                      -3-
<PAGE>

   2.1    Asset and Stock Purchase Agreement by and between the Company and
          Telegroup dated June 30, 1999.

   4.1    First Supplemental Indenture dated June 30, 1999, by and between the
          Company and First Union National Bank, as Trustee.

   4.2    Indenture, dated January 29, 1999, by and between the Company and
          First Union National Bank, as Trustee; Incorporated by reference to
          Exhibit 4.7 of the Company's Registration Statement on Form S-4/A,
          dated May 6, 1999, File No. 333-76965.

   4.3    Specimen 11 1/4% Senior Note due 2009 of the Company, CUSIP No.
          741929AF0.

                                      -4-
<PAGE>

          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.


                                    PRIMUS TELECOMMUNICATIONS GROUP,
                                    INCORPORATED

                                    /s/ John F. DePodesta
                                    _________________________________
Date:  July 14, 1999                By: John F. DePodesta
                                    Executive Vice President

                                      -5-
<PAGE>

                                 EXHIBIT INDEX


 EXHIBIT
 NUMBER                    DESCRIPTION OF EXHIBITS
 ------                    -----------------------

   2.1        Asset and Stock Purchase Agreement by and between the Company and
              Telegroup dated June 30, 1999. (The exhibits and schedules listed
              in the table of contents to the Asset and Stock Purchase Agreement
              have been omitted in accordance with Item 601(b)(2) of Regulation
              S-K. A copy such exhibits and schedules shall be furnished
              supplementally to the Securities and Exchange Commission upon
              request.)

   4.1        First Supplemental Indenture, dated June 30, 1999, by and between
              the Company and First Union National Bank, as Trustee.

   4.2        Indenture, dated January 29, 1999, by and between the Company and
              First Union National Bank, as Trustee; Incorporated by reference
              to Exhibit 4.7 of the Company's Registration Statement on Form S-
              4/A, dated May 6, 1999 File No. 333-76965.

   4.3        Specimen 11 1/4% Senior Note due 2009 of the Company, CUSIP No.
              741929AF0.

                                      -6-

<PAGE>

                                                                     EXHIBIT 2.1


                                                                       EXECUTION

================================================================================


                      ASSET AND STOCK PURCHASE AGREEMENT

                                BY AND BETWEEN

                                TELEGROUP, INC.

                                      AND

                 PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED


================================================================================
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                         Page
<S>                                                                      <C>
ARTICLE I

     PURCHASE AND SALE OF ASSETS AND STOCK..............................  1
         1.1.  Asset Purchase Transaction...............................  1
                 1.1.1.  Purchase of Assets.............................  1
                 1.1.2.  Excluded Assets................................  4
                 1.1.3.  Assumption of Liabilities......................  4
                 1.1.4.  Designation of the Affiliated Purchaser........  4
         1.2.  The Purchase Price.......................................  4
                 1.2.1.  The Aggregate Price............................  4
                 1.2.2.  Payment of the Purchase Price..................  6
                 1.2.3.  Purchase Price Estimates.......................  7
                 1.2.5.  Post-Closing Determinations....................  8

ARTICLE II

     THE CLOSING........................................................ 12
         2.1.  The Closing.............................................. 12
         2.2.  Deliveries at the Closing................................ 12

ARTICLE III

     REPRESENTATIONS AND WARRANTIES..................................... 14
         3.1.  Representations and Warranties of the Seller............. 14
                 3.1.1.  Corporate Status............................... 14
                 3.1.2.  Authorization, etc............................. 14
                 3.1.3.  No Conflicts, etc.............................. 14
                 3.1.4.  Financial Statements........................... 15
                 3.1.5.  Absence of Undisclosed Liabilities............. 15
                 3.1.6.  Litigation..................................... 15
                 3.1.7.  Proprietary Rights............................. 15
                 3.1.8.  Title to Purchased Assets...................... 16
                 3.1.9.  Licenses; Tarriffs, etc........................ 16
                 3.1.10. Material Contracts............................. 17
                 3.1.11. Real Property.................................. 18
                 3.1.12. Environmental Matters.......................... 19
                 3.1.13. Employees, Labor Matters, etc.................. 20
</TABLE>

                                      -i-
<PAGE>

<TABLE>
<S>                                                                        <C>
                 3.1.14.  Employee Benefit Plans.......................... 20
                 3.1.15.  Subsidiaries.................................... 21
                 3.1.16.  Subsidiaries -- Tax Matters..................... 22
                 3.1.17.  Brokers, Finders, etc........................... 22
                 3.1.18.  Safety and Health............................... 22
                 3.1.19.  Accounts Receivable............................. 23
                 3.1.20.  Other Items Estimate............................ 23
                 3.1.21.  PTGI Notes...................................... 23
                 3.1.22.  Disclosure; Veracity of Statements.............. 25
         3.2.  Representations and Warranties of the Purchaser............ 25
                 3.2.1.   Corporate Status................................ 25
                 3.2.2.   Authorization, etc.............................. 25
                 3.2.3.   No Conflicts, etc............................... 26
                 3.2.4.   Litigation...................................... 26
                 3.2.5.   Available Funds................................. 26
                 3.2.6.   Reliance........................................ 26
                 3.2.7.   Brokers, Finders, etc........................... 26

ARTICLE IV

     PRE-CLOSING COVENANTS................................................ 27
         4.1.  HSR Act, FCC Approvals and Other Regulatory Approvals...... 27
         4.2.  Pre-Closing Covenants...................................... 27
                 4.2.1.   Conduct of the Business of the Seller........... 27
                 4.2.2.   Maintenance of, and Access to, Records.......... 29
                 4.2.4.   Notification.................................... 30
                 4.2.5.   Termination of Encumbrances..................... 30
                 4.2.6.   Preparation and Execution of Related Purchase
                          Agreement....................................... 30

ARTICLE V

     CONDITIONS PRECEDENT TO THE ASSET PURCHASE TRANSACTION............... 31
         5.1.  Conditions to Obligations of Each Party.................... 31
                 5.1.1.   HSR Act Notification and FCC Approvals.......... 31
                 5.1.2.   No Injunction, etc.............................. 31
                 5.1.3.   Escrow Agreement................................ 31
         5.2.  Conditions to Obligations of the Purchaser................. 31
                 5.2.1.   Representations; Covenants...................... 31
                 5.2.2.   Board Approval.................................. 31
                 5.2.3.   Discharge and Satisfaction of Encumbrances...... 31
</TABLE>

                                     -ii-
<PAGE>

<TABLE>
<S>                                                                        <C>
                 5.2.4.  Noncompete....................................... 32
                 5.2.5.  No Material Adverse Effect....................... 32
                 5.2.6.  Headquarters..................................... 32
                 5.2.7.  NPC/Portland Switch.............................. 32
                 5.2.8.  Related Purchase Agreement....................... 32
         5.3.  Conditions to Obligations of the Seller.................... 33
                 5.3.1.  Representations; Covenants....................... 33
                 5.3.2.  Board Approval................................... 33

ARTICLE VI

     OTHER COVENANTS AND AGREEMENTS....................................... 33
         6.1.  Covenants and Agreements of the Seller..................... 33
                 6.1.1.  Further Assurances............................... 33
                 6.1.2.  Seller's Use of Telegroup Name................... 34
                 6.1.3.  Cash Collections................................. 34
                 6.1.4.  Seller's Covenant to Provide Additional
                         Information with respect to Purchaser's
                         SEC Filings...................................... 34
                 6.1.5.  Covenants Regarding Certain Employees of
                         Telegroup KK..................................... 35
                 6.1.6.  Subsidiary Bank Accounts......................... 35
                 6.1.7.  PTGI Notes....................................... 35
                 6.1.8.  Cancellation of Licenses......................... 35
                 6.1.9.  Southern Cross Consent........................... 35
         6.2.  Covenants and Agreements of the Purchaser.................. 36
                 6.2.1.  Post-Closing Access and Information.............. 36
                 6.2.2.  PTGI Notes....................................... 36
                 6.2.3.  Cash Management Costs............................ 37
         6.3.  Expenses................................................... 37
         6.4.  FIRPTA Affidavit........................................... 37

ARTICLE VII

     TERMINATION.......................................................... 37
         7.1.  Ability to Terminate....................................... 37
         7.2.  Effect of Termination...................................... 38
         7.3.  Procedure upon Termination................................. 38

ARTICLE VIII

     EXECUTORY CONTRACTS.................................................. 38
</TABLE>

                                    -iii-

<PAGE>

<TABLE>
<S>                                                                        <C>
         8.1.   Assumption and Assignment................................. 38

ARTICLE IX

     INDEMNITY............................................................ 41
         9.1.   Survival.................................................. 41
         9.2.   Indemnification........................................... 41
                9.2.1.  By Seller......................................... 41
                9.2.2.  By Purchaser...................................... 41
                9.2.3.  Notice of Claims; Defense of Third Party Claim.... 42
                9.2.4.  Limitations....................................... 43

ARTICLE X

     MISCELLANEOUS........................................................ 44
         10.1.  Acknowledgment by the Purchaser........................... 44
         10.2.  Severability.............................................. 44
         10.3.  Notices................................................... 44
         10.4.  Entire Agreement.......................................... 46
         10.5.  Counterparts.............................................. 46
         10.6.  Governing Law, etc........................................ 46
         10.7.  Binding Effect............................................ 46
         10.8.  Assignment................................................ 46
         10.9.  No Third Party Beneficiaries.............................. 46
         10.10. Press Releases and Public Announcements................... 46
         10.11. Amendment, Waivers, etc................................... 46
         10.12. Captions.................................................. 47
         10.13. No Strict Construction; Interpretation.................... 47
         10.14. Incorporation of Exhibits, Annexes and Schedules.......... 47

ARTICLE XI

     DEFINITIONS.......................................................... 47
         11.1.  Definition of Certain Terms............................... 47
         11.2.  Other Definitional Provisions............................. 58
                        11.2.1.  Certain Terms............................ 58
                        11.2.2.  Laws..................................... 58
</TABLE>

                                     -iv-
<PAGE>

Exhibits

Exhibit A             Sale Order
Exhibit B             Amended and Restated Escrow Agreement
Exhibit C             Form of Non-Compete Agreement
Exhibit D             Form of Agreement for Sale of Real Estate
Exhibit E             Form of Assignment and Assumption Agreement
Exhibit F             Form of Lease
Exhibit G             Form of Transition Services Agreement


Disclosure Schedules

Schedule 1.1.1(a)     Tangible and Intangible Assets relating to Categories 1,
                      2, and 3; together with detailed schedules attached
                      thereto as Attachment A
Schedule 1.1.1(n)     Vendor Deposits
Schedule 1.1.1(o)     Bank Accounts
Schedule 1.1.1(p)     Carrier Prepayments
Schedule 1.1.2        Excluded Assets, together with detailed schedules
                      attached thereto as Annex A.
Schedule 1.1.4        Purchaser Designees
Schedule 1.2.6        Allocation of Actual Purchase Price
Schedule 3.1.1        Corporate Status
Schedule 3.1.3        No Conflicts, etc.
Schedule 3.1.4        Financial Statements
Schedule 3.1.6        Litigation
Schedule 3.1.7        Proprietary Rights
Schedule 3.1.8        Encumbrances
Schedule 3.1.9(a)     Licenses
Schedule 3.1.9(b)     Telecommunication Codes
Schedule 3.1.9(d)     Tariffs
Schedule 3.1.9(e)     Telecommunications Facilities
Schedule 3.1.10       Assumed Contracts/Material Contracts
Schedule 3.1.11(a)    Owned Real Property
Schedule 3.1.11(b)    Leased Real Property
Schedule 3.1.12       Environmental Matters
Schedule 3.1.13       Employees, Labor Matters, etc.
Schedule 3.1.14       Employees and Employee Benefits
Schedule 3.1.15       Subsidiaries
Schedule 8.1          Cure Amounts

                                      -v-
<PAGE>

Schedule 8.1(e)       Executory Contracts with Agents
Schedule 11           Scheduled Permitted Liens

                                     -vi-



<PAGE>

                      ASSET AND STOCK PURCHASE AGREEMENT


          This ASSET AND STOCK PURCHASE AGREEMENT (this "Agreement") is made and
                                                         ---------
entered into on June 30, 1999 by and between Telegroup, Inc., an Iowa
corporation (the "Seller") and Primus Telecommunications Group, Incorporated, a
                  ------
Delaware corporation (the "Purchaser"). The Purchaser and the Seller are
                           ---------
sometimes referred to herein as the "Parties." Unless otherwise indicated,
                                     -------
capitalized terms used but not defined prior to the first usage herein are
defined in Section 11.1 hereof.

          WHEREAS, the Seller, directly and through the Purchased Subsidiaries,
is in the business of developing, distributing, servicing, marketing, selling
and providing United States domestic and international telecommunications
products and services, including pre-paid and post-paid local and long-distance
and calling card services (the "Business");
                                --------

          WHEREAS, the Seller filed a chapter 11 petition on February 10, 1999,
(the "Petition Date", commencing Case No. 99-31527 (WFT) (the "Chapter 11 Case")
      -------------                                            ---------------
before the United States Bankruptcy Court for the District of New Jersey (the
"Bankruptcy Court");
- -----------------

          WHEREAS, the Bankruptcy Court entered on June 25, 1999 the Order
Approving the Sale of Certain of Debtor's Assets and Granting Related Relief, a
copy of which is attached hereto as Exhibit A (the "Sale Order"); and
                                    ---------

          WHEREAS, the Purchaser desires to purchase, and the Seller desires the
Purchaser to purchase, certain of the Seller's assets and assume certain of the
liabilities of the Seller in return for the consideration described herein.

          NOW, THEREFORE, in consideration of the mutual representations,
warranties, covenants and agreements made herein, and of the mutual benefit
derived hereby, the Parties, intending to be legally bound, agree as follows:


                                   ARTICLE I

                     PURCHASE AND SALE OF ASSETS AND STOCK
                     -------------------------------------

     1.1  ASSET PURCHASE TRANSACTION.
          --------------------------

          1.1.1  Purchase of Assets.  On the terms and subject to the conditions
                 ------------------
contained in this Agreement, the Seller and the Purchaser agree to and shall
consummate the following transaction on the Closing Date:  Purchaser shall
purchase from the Seller, and the Seller shall sell to Purchaser, by appropriate
grant deeds, bills of sale, assignments and other instruments reasonably
satisfactory to Purchaser and its counsel, all of Seller's right, title and
interest in and
<PAGE>

to all of the assets, properties, rights, titles and interests owned, leased or
used by the Seller in connection with the Business (including indirect and other
forms of beneficial ownership) as of the Closing Date, whether tangible,
intangible, real or personal and wherever located and by whomever possessed,
other than the Excluded Assets (collectively, the "Purchased Assets") for an
                                                   ----------------
amount in immediately available funds and, at Purchaser's option, PTGI Notes
equal, in the aggregate, to the Purchase Price free and clear of all
Encumbrances, and subject only to the Permitted Encumbrances and the Assumed
Liabilities. The Purchased Assets shall include, without limitation:

                 (a) the tangible and intangible assets relating to categories
1, 2, 3, 4 (except for category 4b (Portland Switch Site) and 4c (NPC IRU)), 5
and 6(f) of Schedule 1.1.1(a) hereto and the detailed schedules attached thereto
            -----------------
as Annex A;

                 (b) the Seller's right, title and interest in and to the share
capital and/or equity or capital stock of the Purchased Subsidiaries and the
intercompany accounts receivable, loans, notes receivable and other amounts owed
between the Seller and any of the Purchased Subsidiaries;

                 (c) the Seller's machinery, vehicles, fixtures, equipment,
furniture, replacement and component parts, and office and other supplies;

                 (d) all of the Seller's right, title and interest in, to and
under any land, buildings and improvements owned or leased by the Seller in
connection with the Business pursuant to Assumed Contracts, other than the
Headquarters Building (except to the extent contemplated by Section 5.2.6
hereof);

                 (e) except those relating solely to the Excluded Subsidiaries
or the Excluded Assets, copies of any and all of the Seller's business books,
records, manuals (in any form or medium), catalogues; sales, market, customer or
other data; price lists, lists of customers, sales and promotional materials and
records, purchasing records; personnel records, blueprints, drawings,
schematics, maps; research and development or engineering records and files;
accounting records and sales order files, in each case which is used or useful
in the Business;

                 (f) all of Seller's Proprietary Rights used or useful in the
Business, including, without limitation, all of Seller's rights, title and
interest in, to and under the tradenames "Telegroup," "Global Access" and
"Spectra;"

                 (g) all Governmental Approvals related to the Business,
including all applications therefor to the extent transferrable under applicable
law;

                                      -2-
<PAGE>

                 (h) all of the rights and obligations of the Seller under all
contracts, leases, easements, commitments and other agreements relating to the
Business, to the extent assigned to and assumed by the Purchaser pursuant to
Article VIII hereof (the "Assumed Contracts");
                          -----------------

                 (i) all of Seller's apparatus, computers, software source
codes, tapes, databases, websites and other tangible forms of media, and
electronic data processing equipment used or useful in the Business;

                 (j) all rights to causes of action, lawsuits, judgments,
claims, refunds, rights of recovery, rights of setoff, rights of recoupment and
demands of any nature available to or being pursued by the Seller and related to
the Business or to the ownership, use, function or value of any Purchased Asset,
whether arising by way of counterclaim or otherwise (including, without
limitation, any and all rights, claims and causes of action against Dr. Paul
Gelderloos, Eurocom Holding, B.V., Global Access, B.V., and Gerderloos Holding,
B.V., that Seller or any Excluded Subsidiary has or could have as of the Closing
Date;

                 (k) licenses and authorizations of Seller issued by the State
of Hawaii or issued to Seller in connection with the business of the Purchased
Subsidiaries, and all tariffs (including copies on diskette) and applications
therefor and telecommunications numbering codes related to the Business or any
of the Purchased Assets including the benefits relating thereto, including, but
not limited to, the Seller's Carrier Identification Codes, equal access numbers,
and allocated NXX codes to the extent authorized in or granted in Assumed
Contracts;

                 (l) all stationery, purchase order and other forms, labels,
shipping materials, brochures, artwork, photographs, advertising materials and
similar items used by Seller in the Business;

                 (m) all Accounts Receivable;

                 (n) when paid for by Purchaser pursuant to Section 1.2.2(f)
hereof, all vendor deposits, prepaid expenses and other prepaid amounts (other
than Purchased Carrier Prepayments) paid by Seller identified on Schedule
1.1.1(n) (the "Vendor Deposits") and all of Seller's rights to retain any
Customer Deposits; and

                 (o) all cash relating to Seller's retail and wholesale business
in the bank accounts listed on Schedule 1.1.1(o) hereto (the "Bank Accounts");
                               -----------------              -------------

and

                 (p) the prepayments made by Seller after the Petition Date and
prior to the Closing Date in the amounts and to the carriers identified on
Schedule 1.1.1(p) hereto to the extent assignable to Purchaser (the "Purchased
- -----------------                                                    ---------
Carrier Prepayments")
- -------------------

                                      -3-
<PAGE>

          1.1.2. Excluded Assets.  Notwithstanding the foregoing, the assets
                 ---------------
listed on Schedule 1.1.2 hereto (as further described on the detailed schedules
          --------------
attached thereto as Annex A), are expressly excluded from the purchase and sale
                    -------
contemplated hereby (the "Excluded Assets") and, as such, are not included in
                          ---------------
the Purchased Assets.  The Purchaser shall have the right, upon written notice
no later than one (1) day prior to the Closing, and without reduction of the
Purchase Price, to identify additional assets (whether or not related to the
Business) which shall, by reason of being so identified, become Excluded Assets
for all purposes of this Agreement.

          1.1.3. Assumption of Liabilities.  On the terms and subject to the
                 -------------------------
conditions specified in this Agreement, from and after the Closing Date, the
Purchaser will assume and be responsible for and agrees to pay, defend,
discharge and perform as and when due only the Assumed Liabilities.
Notwithstanding any provision to the contrary contained in this Agreement,
Seller shall retain and have full responsibility and obligation with respect to
all liabilities, responsibilities and obligations of Seller other than the
Assumed Liabilities (all liabilities, debts, contracts, agreements or
obligations of Seller other than the Assumed Liabilities being referred to
herein as the "Non-assumed Liabilities").
               -----------------------

          1.1.4. Designation of the Affiliated Purchaser.  Prior to the
                 ---------------------------------------
Closing, upon at least one (1) day written notice to the Seller, the Purchaser
may designate one or more Affiliates to receive at the Closing all or any part
of the Purchased Assets; provided, however, that no such designation shall in
any event limit or affect the obligations of the Purchaser under this Agreement.
Purchaser hereby designates the Affiliates of Purchaser set forth on Schedule
                                                                     --------
1.1.4 hereto to take title to and receive on behalf of Purchaser all of Seller's
- -----
right, title and interest in and to the Purchased Assets set forth opposite the
names of such Affiliates on such Schedule.

     1.2  The Purchase Price.
          ------------------

          1.2.1. The Aggregate Price.  The aggregate purchase price for the
                 -------------------
Purchased Assets (the "Purchase Price") will be equal to
                       --------------

                 (a)  the sum of

                      (i)    Seventy-One Million Eight Hundred Twenty-Five
                             Thousand Dollars ($71,825,000), plus

                      (ii)   an amount equal to ninety-two and one-half percent
                             (92.5%) of the Accounts Receivable on the
                             Effective Closing Date which were ninety (90) or
                             fewer days from the date of invoice as of the
                             Effective Closing Date, plus

                                      -4-
<PAGE>

                      (iii)  an amount equal to forty-six and one-quarter
                             percent (46.25%) of the billed Accounts Receivable
                             on the Effective Closing Date which were ninety-one
                             (91) or more days from the date of invoice as of
                             the Effective Closing Date, minus

                      (iv)   the amount equal to any accrued personal time
                             included in the Assumed Liabilities, minus

                      (v)    an amount equal to the aggregate amount of Customer
                             Deposits existing as of the Effective Closing Date,
                             plus

                      (vi)   the excess of the Net Working Capital of the
                             Purchased Subsidiaries as of the Effective Closing
                             Date over $5,601,615; plus

                 (b)  the sum of

                      (i)    the cash balance in the Bank Accounts as of the
                             Effective Closing Date, plus the Carrier A/R
                             Collections, and minus the amount of the Seller's
                             payments made after the Effective Closing Date and
                             on or prior to the Closing Date in respect of
                             payables accrued in Seller's retail and wholesale
                             business on or prior to the Effective Closing Date
                             (the "Effective Date Net Cash Balance"); plus
                                   --------------------------------

                      (ii)   the remaining, unused balance of the Purchased
                             Carrier Prepayments as of the Effective Closing
                             Date; plus

                 (c)  the assumption by the Purchaser of the Assumed
                      Liabilities; plus

                 (d)  an amount equal to the aggregate amount of Vendor Deposits
                      existing as of the Effective Closing Date and the Cure
                      Amounts set forth on Schedule 8.1.
                                           ------------

For purposes of clause (vi) of Section 1.2.1(a), "Net Working Capital" shall
                                                  -------------------
mean the current assets, including $562,000 in note receivable owing to
Telegroup Nederland B.V. from Dr. Paul Gelderloos) plus deposits made by the
Purchased Subsidiaries with their vendors, minus the current liabilities,
including liabilities for customer deposits placed with the Purchased
Subsidiaries and for trademark infringement claims identified on Schedule 3.1.5
hereto, if then

                                      -5-
<PAGE>

quantified, in each case of the Purchased Subsidiaries, after eliminating all
intercompany indebtedness (whether owed by or to the Purchased Subsidiary) on
the books of the Purchased Subsidiaries, each as determined in accordance with
GAAP.

          1.2.2. Payment of the Purchase Price.
                 -----------------------------

                 (a) Cash or Notes.  The Purchase Price payable pursuant to
                     -------------
Section 1.2.1(a) shall be payable in cash; provided that Purchaser may elect, by
written notice to Seller delivered at or prior to Closing, to pay up to fifty
percent (50%) of the components of the Purchase Price identified in Section
1.2.1(a) in PTGI Notes (the actual percentage elected being herein referred to
as the "Elected Percentage") if (i) such PTGI Notes have an aggregate original
        -------------------
principal amount equal to the portion of the Purchase Price being paid by
delivery of such PTGI Notes, and (ii) PTGI shall cause a registration statement
with respect thereto to become effective within one hundred twenty (120) days
after the Closing Date, all as more specifically set forth in Section 6.2.2 of
this Agreement.

                 (b) Earnest Money Deposit.  On May 28, 1999, the Purchaser
                     ---------------------
deposited $7,172,000 (together with any interest accrued thereon from May 28,
1999, the "Earnest Money Deposit") in the interest-bearing escrow account
           ---------------------
maintained at IBJ Whitehall Bank & Trust Company (the "Escrow Agent") pursuant
                                                       ------------
to an Escrow Agreement dated as of May 28, 1999, attached hereto as Exhibit B,
among the Seller, the Purchaser and the Escrow Agent (the "Earnest Money Escrow
                                                           --------------------
Agreement"). Any portion of the Earnest Money Deposit paid to Seller at the
- ---------
Closing will be credited against the portion of the Purchase Price payable in
cash.

                 (c) Escrow Deliveries at Closing.  At the Closing, the
                     ----------------------------
Purchaser shall deliver to the Escrow Agent cash in an amount equal to:

                     (i)   10% of the Net Working Capital of the Purchased
Subsidiaries, as estimated by the Seller pursuant to Section 1.2.3(c) (the "W/C
                                                                            ---
Escrowed Amount"). The W/C Escrowed Amount (minus any interest accrued thereon
- ---------------
from the Closing Date, which interest shall be payable to Purchaser) shall be
released to Seller or Purchaser as provided in this Agreement and shall
otherwise be governed by an escrow agreement substantially similar to the
Earnest Money Escrow Agreement which is executed and delivered at Closing in a
form mutually satisfactory to Purchaser and Seller;

                     (ii)  $372,875 which is the aggregate purchase price for
those Purchased Assets to be acquired pursuant to the Related Purchase
Agreement, which amount shall be released to Telegroup Hong Kong Ltd. or
Purchaser pursuant to the terms of the Related Purchase Agreement; and

                                      -6-
<PAGE>

                     (iii) $30,000 which shall be available to fund Seller's
indemnity obligation pursuant to Section 9.2.1(c) hereof, which amount shall be
released to Seller on the sixtieth (60th) day following the Closing Date, except
to the extent Purchaser has provided written notice of a claim for indemnity
under Section 9.2.1(c) hereof.

                 (d) Delivery of Cash and Notes at Closing.  At the Closing, the
                     -------------------------------------
Purchaser shall deliver to the Seller:

                     (i)    PTGI Notes having an original principal amount equal
to the Elected Percentage of the aggregate of the components of the Purchase
Price payable pursuant to Section 1.2.1(a) hereof;

                     (ii)   A promissory note issued by the Purchaser to the
Seller in an aggregate principal amount equal to twenty-five percent (25%) of
the A/R Purchase Price (the "A/R Promissory Note");
                                 -------------------

                     (iii)  Cash in an amount equal to the portion of the
Purchase Price payable pursuant to Section 1.2.1(a) and (b) which is not paid by
delivery of PTGI Notes or the A/R Promissory Note, less:

                            (A) the Earnest Money Escrow Deposit;
                            (B) the Escrowed Purchase Price; and
                            (C)  the W/C Escrow Amount.

                 (e) Post-Closing Payment of the A/R Purchase Price.  The A/R
                     ----------------------------------------------
Promissory Note shall provide that sixty percent (60%) of the principal amount
of the A/R Promissory Note shall be paid in cash on July 30, 1999 and forty
percent (40%) of the principal amount of the A/R Promissory Note shall be paid
in cash on August 31, 1999.

                 (f) Amounts payable in respect of Vendor Deposits and Cure
Amounts shall be paid in cash by Purchaser to Seller as, when and if Purchaser
assumes the Assumed Contracts to which such items relate, in accordance with
Article VIII hereof.

          1.2.3. Purchase Price Estimates.  Before the Closing Date, Seller
                 ------------------------
will, in good faith and in accordance with GAAP, deliver to Purchaser not more
than fifteen (15) nor less than two (2) days before the Closing Date, estimates
of the following amounts, together with detailed written explanation and back-up
documentation in support thereof:

                 (a) the Accounts Receivable as of the Effective Closing Date
("Estimated A/R");
- ---------------

                                      -7-
<PAGE>

                 (b)  the Effective Date Net Cash Balance;

                 (c)  the Net Working Capital of the Purchased Subsidiaries (the

"Estimated W/C");
- --------------

                 (d) the Customer Deposits;

                 (e) the accruals for personal time referenced in clause (iv)
of Section 1.2.1(a);

                 (f) the Carrier A/R Collections; and

                 (g) the amount payable in respect to Purchased Carrier
Prepayments described in Section 1.2.1(b)(ii).

          1.2.4. Purchase Price Adjustments.  The Purchase Price payable
                 --------------------------
pursuant to Section 1.2.1 shall be adjusted as set forth in this Section 1.2.4.

                 (a) The portion of the Purchase Price payable pursuant to
clause (i) of Section 1.2.1(a) shall be adjusted as set forth in Section
1.2.5(c).

                 (b) The A/R Purchase Price shall be adjusted as set forth in
Section 1.2.5(d).

                 (c) The portion of the Purchase Price payable pursuant to
clause (vi) of Section 1.2.1(a) relating to Net Working Capital shall be
adjusted as set forth in Section 1.2.5(e).

                 (d) The portion of the Purchase Price payable pursuant to
clauses (iv) and (v) of Section 1.2.1(a) and pursuant to Section 1.2.1(b) shall
be adjusted as set forth in Section 1.2.5(f).

          1.2.5. Post-Closing Determinations.
                 ---------------------------

                 (a) The Purchaser and its auditors will conduct a review (the
"Closing Review") within sixty (60) days after the Closing Date, of
 --------------

                     (i)    the Revenues during the month of March 1999 of the
Retail Customers and the Call Back Customers,

                     (ii)   the Purchased Subsidiaries, including an analysis of
Net Working Capital thereof, as of the Effective Closing Date, and

                                      -8-
<PAGE>

                     (iii)  the Accounts Receivable of the Seller as of the
Effective Closing Date, and

                     (iv)   the items included in the estimates delivered
pursuant to Section 1.2.3 (other than clauses (a) and (c) thereof)
(collectively, the "Other Items").
                    ------------

                 (b) Based on the Closing Review, the Purchaser and its auditors
will prepare and deliver to the Seller a computation of the Purchase Price based
on such items, in accordance with GAAP (the "Draft Price Calculation"). The
                                             -----------------------
Purchaser and its auditors will give the Seller and its auditors an opportunity
to observe the Closing Review and will make available to Seller all records and
work papers used in preparing the Draft Price Calculation.  If the Seller
disagrees with the computation of any of the items contained in the Draft Price
Calculation, the Seller may, within thirty (30) days after receipt of the Draft
Price Calculation, deliver a notice (an "Objection Notice") to the Purchaser
                                         ----------------
setting forth the Seller's calculation of the amount(s) of any disputed items.
With respect to any  items as to which no dispute exists, the Seller or the
Purchaser, as the case may be, shall, within thirty (30) days after receipt of
the Draft Price Calculation, pay the other party any post-closing adjustment as
contemplated by Section 1.2.4 (the "Interim Payments").  With respect to any
                                    ----------------
items in the Draft Price Calculation as to which there is a dispute, the
Purchaser and the Seller will use reasonable efforts to resolve the disagreement
within twenty (20) days after the Purchaser has received the Objection Notice.
If the Parties do not obtain such a final resolution within such 20-day period,
the Purchaser and the Seller will jointly retain an independent accounting firm
of recognized national or regional standing (the "Firm") to resolve any
                                                  ----
remaining disagreements.  If the Purchaser and the Seller are unable to agree on
the choice of the Firm, the Firm will be a "big-five" accounting firm selected
by lot (after excluding one firm designated by each of the Purchaser and the
Seller).  The Purchaser and the Seller will direct the Firm to render a
determination within thirty (30) days of its retention.  The Purchaser and the
Seller will and will cause their respective employees to cooperate fully with
the Firm during its engagement.  The Firm will consider only those items and
amounts in the Draft Price Calculation set forth in the Objection Notice which
the Purchaser and the Seller are unable to resolve.  The determination of the
Firm will be conclusive and binding upon the Purchaser and the Seller.  The
Purchaser and the Seller will each pay one half of the fees and expenses of the
Firm.

                 (c) Revenue Adjustment.  If there is a difference between the
                     ------------------
actual March 1999 Revenues as finally determined pursuant to this Section 1.2.5
("Final Revenues") and the Revenues reflected on Schedule 1.1.1(a) ("Preliminary
  --------------                                                     -----------
Revenues"), an adjustment shall be made in the Purchase Price payable pursuant
- --------
to Section 1.2.1(a) based on the following multiples: (i) three point zero (3.0)
times the Revenues of the Retail Customers (other than Retail Customers in
Japan, Hong Kong or the Netherlands and other card customers referred to in item
2.c of Schedule 1.1.1(a)); (ii) two point zero (2.0) times the Revenues of the
Call Back

                                      -9-
<PAGE>

Customers; (iii) two point five (2.5) times the Revenues of Retail
Customers in the Netherlands and the other card customers referred to in item
2.c of Schedule 1.1.1(a) and (iv) one point five (1.5) times the Revenues of
Retail Customers located in Hong Kong and Japan.

                 (i)    If the Final Revenues are greater in any category than
the Preliminary Revenues (plus any Interim Payments paid by the Purchaser or
less any Interim Payments paid by the Seller), the Purchaser will, within five
(5) Business Days after the determination thereof, pay to the Seller in cash the
amount of such difference times the multiple applicable to that category.

                 (ii)   If the Final Revenues are less in any category than the
Preliminary  Revenues (plus any Interim Payments paid by the Purchaser or less
any Interim Payments paid by the Seller), the Seller will, within five (5)
Business Days after the determination thereof, pay to the Purchaser in cash the
amount of such difference times the multiple applicable to that category.

          (d)    A/R Adjustment.  If there is a difference between the Accounts
                 --------------
Receivable as of the Effective Closing Date, as determined in the Closing Review
(the "Final A/R"), and the Estimated A/R, an adjustment shall be made to the A/R
      ---------
Purchase Price based on the percentage by which such Accounts Receivable were
multiplied in Sections 1.2.1(a)(ii) and (iii).

                 (i)    If the Final A/R is more in either category than the
Estimated A/R, then an additional amount (after taking Interim Payments, if any,
with respect thereto into account) shall be paid by the Purchaser in cash to the
Seller so that the total A/R Purchase Price shall have been based upon the Final
A/R.

                 (ii)   If the Final A/R is less in either category than the
Estimated A/R, then the remaining portion of the A/R Purchase Price due or to
become due pursuant to Section 1.2.2(e) shall be reduced (after taking Interim
Payments, if any, with respect thereto into account) by the amount necessary to
make the total A/R Purchase Price be based upon the Final A/R.  If such
remaining unpaid amount of the A/R Purchase Price is insufficient, then Seller
shall pay to the Purchaser the difference in cash.

          (e)    Net W/C Adjustment.  If there is a difference between the Net
                 ------------------
Working Capital of the Purchased Subsidiaries as of the Effective Closing Date,
as determined in the Closing Review (the "Final W/C"), and the Estimated W/C, a
                                          ---------
dollar-for dollar adjustment shall be made to the amount of the Purchase Price
payable pursuant to Section 1.2.1(a)(vi).

                 (i)    If the Final W/C is more than the Estimated W/C, the
Purchaser will instruct the Escrow Agent to release the W/C Escrowed Amount to
the Seller and

                                      -10-
<PAGE>

shall pay to the Seller an additional amount (as necessary after taking Interim
Payments, if any, with respect thereto into account), in cash so that the
Purchase Price payable pursuant to Section 1.2.1(a)(vi) shall have been based
upon the Final W/C.

                     (ii)   If the Final W/C is less than the Estimated W/C,
Seller shall instruct the Escrow Agent to distribute the amount of such
difference (after taking Interim Payments, if any, with respect thereto into
account) to the Purchaser from the W/C Escrowed Amount, with any remaining
balance of the W/C Escrowed Amount to be released to the Seller pursuant to the
Escrow Agreement, or, if the W/C Escrowed Amount is insufficient to pay such
Purchase Price adjustment to the Purchaser, then Seller shall pay to the
Purchaser the difference in cash.

                 (f) Other Items Adjustment.  If there is a difference between
                     ----------------------
the amount as of the Closing Date of the Other Items as determined in the
Closing Review (the "Final Other Items Amount") and the Other Items Estimate,
                     ------------------------
then a dollar-for dollar adjustment shall be made to the amount of the Purchase
Price payable in respect of the Other Items. In the event the Other Items
Estimate is less than the Final Other Items Amount, then the Purchaser shall pay
to the Seller, in cash, an amount equal to the difference. In the event the
Other Items Estimate is greater than the Final Other Items Amount, then the
Seller shall pay the Purchaser, in cash, an amount equal to the difference.

                 (g) All cash payments pursuant to this Section 1.2.5 shall be
made by wire transfer or delivery of other immediately available funds.

                 (h) The amount of the Purchase Price after adjustment pursuant
to this Section 1.2.5, is referred to herein as the "Actual Purchase Price."
                                                     ---------------------
Seller acknowledges and accepts that, because all adjustments made pursuant to
this Section 1.2.5 are to be paid in cash, it is possible that the PTGI Notes
will comprise more than fifty percent (50%) of the Actual Purchase Price.

          1.2.6. Allocation of Purchase Price.
                 ----------------------------

                 (a) Within thirty (30) days after final determination of the
Actual Purchase Price, the Purchaser shall provide to Seller an allocation of
the Actual Purchase Price among the Purchased Assets in accordance with an
allocation which will be prepared in accordance with Section 1060 of the Code.
The allocation will (i) be set forth on Schedule 1.2.6 hereof, (ii) be delivered
                                        --------------
in accordance with this Section 1.2.6(a) and deemed a part of this Agreement to
the same extent as if delivered on the date hereof, and (iii) allocate the cash
and PTGI Notes comprising the payment of the Purchase Price among the Purchased
Assets.  Within thirty (30) days after receipt of such schedule, the Seller
shall notify the Purchaser of any objection it has to Purchaser's allocation
schedule. The parties shall in good faith attempt to

                                      -11-
<PAGE>

resolve the disagreement evidenced by Seller's objection for a period of thirty
(30) days after Purchaser's receipt of Seller's objections. If no agreement on
an allocation of the Purchase Price with respect to the Assets is reached within
such thirty (30) day period, such allocation of the Purchase Price to the Assets
shall be determined by the Firm and the expenses of the Firm's determination
shall be borne equally by Seller and Purchaser. The Purchaser's allocation
schedule shall be final and binding if no objection is timely raised thereto by
the Seller. Otherwise, the allocation schedule as determined by the Firm shall
be final and binding on the Purchaser and the Seller.

                 (b) In connection with the determination of the allocation to
be set forth on Schedule 1.2.6 above, the Parties shall cooperate with each
                --------------
other and provide such information as any of them shall reasonably request. The
Parties will each report the federal, state and local and other Tax consequences
of the purchase and sale contemplated hereby (including the filing of Internal
Revenue Service Form 8594) in a manner consistent with such allocation schedule.


                                  ARTICLE II

                                  THE CLOSING
                                  -----------

     2.1  The Closing.  The closing of the transaction contemplated hereby (the
          -----------
"Closing") shall take place at the offices of Pepper Hamilton LLP, Two Logan
 -------
Square, 18th and Arch Streets, 30th Floor, Philadelphia, Pennsylvania or at such
other place as may be mutually agreeable to each of the Parties, at 10:00 a.m.,
local time, on the date that is not more than five (5) Business Days after the
conditions to Closing set forth in Article V have been satisfied or waived, or
at such other place or on such other date as may be mutually agreeable to the
Parties. The Closing shall be effective as of the Effective Closing Date.  The
time and date of the Closing are referred to herein as the "Closing Date."
                                                            ------------

     2.2  Deliveries at the Closing.  At the Closing,
          -------------------------

          2.2.1. The Seller shall deliver to the Purchaser, upon receipt of the
payments of cash and delivery of PTGI Notes due to Seller at Closing pursuant to
Section 1.2.2 hereof:

                 (a) a copy of the resolutions of the Board of Directors of the
Seller authorizing the execution, delivery and performance hereof by the Seller,
and a certificate of its Secretary, dated as of the Closing Date, certifying
that such resolutions were duly adopted and are in full force and effect;

                                      -12-
<PAGE>

                 (b) all documents, certificates and agreements reasonably
necessary to transfer to the Purchaser as of Closing Date title to the Purchased
Assets free and clear of any and all Encumbrances thereon;

                 (c) with respect to the Shares of the non-U.S. Purchased
Subsidiaries, duly executed or endorsed share transfers or notarial deeds of
transfer in favor of the Purchaser, or as it may direct, together with related
Share certificates or Share transfer forms for the Shares and any power of
attorney or other authority under which such transfers have been executed;

                 (d) the FIRPTA Affidavit described in Section 6.4 duly
 executed;

                 (e) the Non-Competition Agreement duly executed; and

                 (f) the other documents to be delivered by Seller which are
referred to in Article V hereof.

          2.2.2. The Purchaser shall deliver to the Seller

                 (a) PTGI Notes having an aggregate principal amount equal to
the Elected Percentage of the Purchase Price payable under Section 1.2.1(a)
hereof;

                 (b) cash in the amounts due at Closing pursuant to Section
1.2.2, in immediately available funds to the account(s) designated by the Seller
at least one (1) Business Day prior to the Closing;

                 (c) the A/R Promissory Note;

                 (d) a copy of the resolutions of the Board of Directors of the
Purchaser, or similar enabling document authorizing the execution, delivery and
performance hereof by the Purchaser, and a certificate of its Secretary or
Assistant Secretary, dated as of the Closing Date, that such resolutions were
duly adopted and are in full force and effect; and

                 (e) the other documents to be delivered by Purchaser which are
referred to in Article V hereof.

          2.2.3. The Purchaser shall deliver the W/C Escrowed Amount and the
Escrowed Purchase Price to the Escrow Agent in immediately available funds.

                                      -13-
<PAGE>

                                  ARTICLE III

                        REPRESENTATIONS AND WARRANTIES
                        ------------------------------

     3.1  Representations and Warranties of the Seller.  The Seller hereby
          --------------------------------------------
represents and warrants to the Purchaser as of the date hereof and as of the
Closing Date as follows:

          3.1.1. Corporate Status.  The Seller is a corporation duly organized,
                 ----------------
validly existing and in good standing under the laws of the State of Iowa and is
duly qualified or licensed to do business and is in good standing in each of the
jurisdictions listed on Schedule 3.1.1 hereto, which Schedule lists each
                        --------------
jurisdiction in which the nature of its business or the properties owned,
operated or leased by it make such qualification, licensing or good standing
necessary, except where the failure to have such power or authority, or the
failure to be so qualified, licensed and in good standing, would not have a
Material Adverse Effect.

          3.1.2. Authorization, etc.  Subject to the entry by the Clerk of the
                 -------------------
Bankruptcy Court of the Sale Order, the Seller has the requisite corporate power
and authority to execute and deliver this Agreement and the other agreements,
documents, instruments, exhibits, schedules, and certificates contemplated
hereby (the "Other Seller Documents"), to perform fully its obligations
             ----------------------
hereunder and thereunder, and to consummate the transactions contemplated hereby
and thereby.  The execution and delivery by the Seller of this Agreement and the
Other Seller Documents, and the consummation of the transactions contemplated
hereby and thereby, have been duly authorized by all requisite corporate action
of the Seller.  Subject to the entry by the Clerk of the Bankruptcy Court of the
Sale Order, this Agreement and Other Seller Documents are legal, valid and
binding obligations of the Seller, enforceable against it in accordance with its
terms, except as such enforceability may be limited by (a) applicable
insolvency, bankruptcy, reorganization, moratorium or other similar laws
affecting creditors' rights generally and (b) applicable equitable principles
(whether considered in a proceeding at law or in equity).

          3.1.3. No Conflicts, etc.  Subject to the entry by the Clerk of the
                 -----------------
Bankruptcy Court of the Sale Order, the execution, delivery and performance by
the Seller under this Agreement and Other Seller Documents, and the consummation
of the transactions contemplated hereby and thereby, do not and will not
conflict with or result in a violation of or a default under (with or without
the giving of notice or the lapse of time or both) (a) any Applicable Law
applicable to the Seller or any Purchased Subsidiary or the Purchased Assets,
(b) the certificate of incorporation or by-laws or other organizational
documents of the Seller or any Purchased Subsidiary or (c) except as set forth
in Schedule 3.1.3 hereto, any material Assumed Contract or other material
   --------------
contract, agreement or other instrument relating to the Business to which the
Seller or any Purchased Subsidiary is a party or by which any thereof is bound.

                                      -14-
<PAGE>

          3.1.4. Financial Statements.  Schedule 3.1.4 hereto consists of: (i)
                 --------------------   --------------
the consolidated unaudited balance sheets of the Seller and the Purchased
Subsidiaries as of December 31, 1998 and the unaudited related statements of
income and cash flows for the respective 12-month period then ended (the
"Unaudited Financial Statements"), and (ii) the consolidated unaudited balance
 ------------------------------
sheet of the Seller and the Purchased Subsidiaries as of March 31, 1999 (the
"Latest Balance Sheet") and the related unaudited statement of income for the
 --------------------
month and three-month periods then ended (collectively, the "Financial
                                                             ---------
Statements").  The Financial Statements present fairly in all material respects
- ----------
the financial condition and results of operations of the Seller and the
Purchased Subsidiaries as of the dates and for the periods therein indicated,
and have been prepared in accordance with GAAP, except that they do not contain
notes and are subject to normal year-end adjustments.

          3.1.5. Absence of Undisclosed Liabilities.  As of the Closing Date,
                 ----------------------------------
none of the Seller or any of the Purchased Subsidiaries will have any material
liabilities that are required to be set forth in a balance sheet for the Seller
or the Purchased Subsidiaries prepared in accordance with GAAP or which would be
so required except for a determination that such liabilities are "remote" as
contemplated by Statement of Financial Accounting Standards No. 5, other than:
(a) the liabilities set forth on the Latest Balance Sheet, (b) liabilities which
have arisen after the date of the Latest Balance Sheet in the ordinary course of
the Business and (c) other liabilities disclosed on Schedule 3.1.5 hereto or
                                                    --------------
other Schedules to this Agreement.  In furtherance and not in limitation of the
foregoing, none of Seller nor the Purchased Subsidiaries has any obligation to
make any further payments in respect of (i) the purchase by Telegroup U.K.
Limited of the assets of Mediacom Tele Facilities Limited, or (b) the purchase
by the Seller of the stock of Corporate Network Limited, South East Telecom
Limited and Phone Centre Communications Limited.

          3.1.6. Litigation. Except as set forth on Schedule 3.1.6 hereto, there
                 ----------                         --------------
is no Action pending, or to the Seller's Knowledge threatened, against or
relating to the Seller in connection with the Purchased Assets or against or
relating to the transactions contemplated by this Agreement or against or
relating to any of the Purchased Subsidiaries.  Except as disclosed in Schedule
                                                                       --------
3.1.6, there are no judgments or outstanding orders, writs, injunctions,
- -----
decrees, stipulations or awards (whether rendered by any foreign or U.S. federal
state or local court or administrative agency, or by arbitration) against the
Seller or any of the Purchased Subsidiaries or any of their respective assets,
properties or businesses.

          3.1.7. Proprietary Rights.  Schedule 3.1.7 hereto lists all of the
                 ------------------   --------------
Proprietary Rights necessary to the conduct of the Business as currently
conducted.  Except as indicated on Schedule 3.1.7, Seller or a Purchased
                                   --------------
Subsidiary owns and possesses, and the Purchased Assets include, the rights,
title and interest in and to the Proprietary Rights set forth therein necessary
to the conduct of the Business as now conducted.  Except as indicated on
Schedule 3.1.7, no executive of the Seller or a  Purchased Subsidiary charged
- --------------
with responsibility for Proprietary Rights matters has received any notices of
invalidity, infringement or misappropriation from any

                                      -15-
<PAGE>

third party with respect to the Proprietary Rights which are listed in Schedule
                                                                       --------
3.1.7 within the past five (5) years.
- -----

          3.1.8. Title to Purchased Assets.  Except as disclosed in Schedule
                 -------------------------                          --------
3.1.8 hereto, the Seller has good title to the Purchased Assets, including,
- -----
without limitation, all equipment manufactured by NORTEL, EXCEL and CISCO
SYSTEMS, the software platform known as the PCS Platform, and the international
callback technology, free and clear of any and all Encumbrances. To the
Knowledge of the Seller, there are no facts or conditions affecting it or any of
the Purchased Subsidiaries which could individually or in the aggregate,
interfere in any material respect with the use, occupancy or operation of the
Purchased Assets or the assets of the Purchased Subsidiaries, taken as a whole,
as currently used, occupied or operated, or their adequacy for such use. The
tangible property included among the Purchased Assets, including, without
limitation, all equipment manufactured by NORTEL, EXCEL and CISCO SYSTEMS or the
assets of the Purchased Subsidiaries is in working order, reasonable wear and
tear excepted. The Purchased Assets constitute all of the assets which are
necessary, used or useful in the operation of the Business other than the
Excluded Assets.

          3.1.9. Licenses; Tarriffs, etc.
                 ------------------------

                 (a) Licences.  Except as indicated in Schedule 3.1.9(a) hereto,
                     --------                          -----------------
the Seller and each of the Purchased Subsidiaries is the holder of each of the
licenses issued by the Federal Communications Commission (the "FCC") listed on
                                                               ---
Schedule 3.1.9(a) and of the other licenses issued by any Governmental Authority
- -----------------
listed on Schedule 3.1.9(a) (collectively the "Licenses").  The licenses so
          -----------------                    --------
listed,  to the extent transferrable under applicable law, are included in the
Purchased Assets and constitute all of the licenses that are used in, and are
material to, the operation of the Business as currently conducted.  Each of the
licenses so listed is in full force and effect and the Seller and each of the
Purchased Subsidiaries is in compliance in all material respects with the terms
and requirements thereof and all of the Communications Laws and other rules and
regulations pertaining thereto.  There is not pending or, to the Knowledge of
the Seller, threatened any Action by the FCC or any other Governmental Authority
to revoke, cancel, suspend, modify in any material respect or refuse to renew
any of the licenses so listed.

                 (b) Telecommunications Codes.  The Seller and each of the
                     ------------------------
Purchased Subsidiaries owns or has been assigned the telecommunications
numbering and access codes listed on Schedule 3.1.9(b). No revocation or
                                     -----------------
cancellation is pending or threatened for any of these codes. The access codes
listed on Schedule 3.1.9(b) constitute all of the access codes necessary to
          -----------------
conduct the respective businesses of the Purchased Subsidiaries as currently
conducted.

                 (c) Insurance.  The Seller currently has and each Purchased
                     ---------
Subsidiary currently has, and for a period of three (3) years prior to the date
of this Agreement (or such

                                      -16-
<PAGE>

shorter period as any Purchased Subsidiary has been in existence) has had
uninterrupted, insurance coverage with respect to the Purchased Assets and other
assets used or useful in this business or respective businesses of the Purchased
Subsidiaries of the kind and type, and in the amounts, usual and customary in
the industries in which the Business and the respective businesses of the
Purchased Subsidiaries operate or have operated. The insurance policies in
effect as of the date of this Agreement evidence such usual and customary
insurance coverage and, with respect to the Purchased Subsidiaries, such
policies are sufficient for compliance with all applicable laws applicable to
the Seller, the Purchased Assets, or the Purchased Subsidiaries, as the case may
be. Such insurance policies shall remain in full force and effect (taking into
consideration the Seller's Chapter 11 Case) until the consummation of the
transactions on the Closing Date.

                  (d) Tariffs.  Except as otherwise  indicated in Schedule
                      --------                                    --------
3.1.9(d) hereto, the Seller and each of the Purchased Subsidiaries has filed the
- --------
tariffs, price lists, or other regulatory filings (collectively, the "Tariffs")
                                                                      -------
required to be submitted by the Seller or any of the Purchased Subsidiaries to
the FCC or any other Governmental Authority (including pending submissions for
any of the foregoing), for the construction and operation of the Business,
including all renewals and extensions thereof. The Seller has made available to
the Purchaser Tariffs used in and that are material to the provision by the
Seller of telecommunications service to its customers as currently provided.
Each of such Tariffs is in full force and effect and the Seller and each
relevant Purchased Subsidiary is in compliance in all material respects with the
terms and requirements thereof and all the Communications Laws and other laws
and governmental regulations pertaining thereto. There is not pending or, to the
Knowledge of the Seller threatened, any Action by the FCC or any other
Governmental Authority to revoke, cancel, suspend, modify in any material
respect or refuse to renew any of such Tariffs.

                  (e) Telecommunications Facilities.  All telecommunications
                      ------------------------------
facilities (including, without limitation, circuits and other transmission
facilities) related to the Business that the Seller or any of the Purchased
Subsidiaries owns, leases, or otherwise has rights to use or to access are
listed in Schedule 3.1.9(e). The Business is in compliance in all material
          -----------------
respects with the terms and requirements of the FCC and any other Governmental
Authority with respect to its ownership, lease, or other rights in and to such
telecommunications facilities. To the Seller's Knowledge, none of the
telecommunication facilities set forth in the Schedule 3.1.9(e) contains any
                                              -----------------
material defect. No present or former officer, manager, member or employee of
the Seller or any of the Purchased Subsidiaries or any Affiliate of any of the
foregoing, or any other Person, owns any interest in any of the
telecommunication facilities so listed.

          3.1.10. Material Contracts.  Other than (a) this Agreement and the
                  ------------------
other agreements and documents contemplated hereby, (b) any purchase order for
services in the ordinary course of business, and (c) any other contract,
agreement or commitment that (i) by its terms, terminates, or may be terminated
by the Seller without penalty within one year of the

                                      -17-
<PAGE>

Closing Date and (ii) is in an amount less than $15,000, Schedule 3.1.10 hereto
                                                         ---------------
lists all of the written contracts which are used or useful in the Business,
including those relating to the following (collectively, the "Material
                                                              --------
Contracts"):
- ---------

                  (a) pensions, profit sharing, stock options, employee stock
purchases or other plans or arrangements providing for deferred or other
compensation to employees or any other employee benefit, welfare or stock plans
or arrangements not described on the attached Schedule 3.1.14;
                              ---------------

                  (b) the employment or engagement of any independent contractor
on a full-time, part-time, consulting or other basis involving in excess of
$75,000 in compensation on an annual basis other than agreements with Churchill
Benefit and Technisource which govern the engagement of numerous contracts, none
of which individually involves in excess of $75,000.00 in annual compensation;

                  (c) indebtedness for borrowed money or the mortgaging,
pledging or otherwise placing an Encumbrance on any of the Purchased Assets
(which Encumbrances other than the Permitted Encumbrances and the Assumed
Liabilities shall be removed on or prior to the Closing Date);

                  (d) the Seller being the lessee of, or holding or operating,
any real or personal property owned by any other Person; or

                  (e) the Seller being the lessor of, or permitting any third
party to hold or operate, any real or personal property owned by the Seller or
of which the Seller is a lessee.

Except as set forth in Schedule 3.1.10, no consent of any third party is
                       ---------------
required under any Material Contract as a result of or in connection with, and
the enforceability of any Material Contract will not be affected in any manner
by, the execution, delivery and performance of this Agreement or the
consummation of the transactions contemplated hereby.  To the Seller's
Knowledge, the Seller has delivered or  made available to the Purchaser true,
complete and correct copies of all written Material Contracts.

          3.1.11. Real Property.
                  -------------

                  (a)  Owned Real Property.  Schedule 3.1.11(a)  hereto sets
                       -------------------   ------------------
forth the address and Seller's percentage ownership of each parcel of real
property owned by the Seller other than any real property constituting an
Excluded Asset (the "Owned Real Property"). The Purchased Assets include, and
                     -------------------
the Seller has title to, the Owned Real Property free and clear of all
Encumbrances other than Encumbrances disclosed on Schedule 3.1.11(a), which
                                                  ------------------
Encumbrances shall be removed on or prior to the Closing Date.

                                      -18-
<PAGE>

                  (b) Leased Real Property .  Schedule 3.1.11(b) hereto
                      --------------------    ------------------
contains a complete and correct list of all material Leases, setting forth the
address, landlord and tenant for each such Lease. Except as set forth on
Schedule 3.1.11(b) and defaults in payment for Seller's prepetition obligations
- ------------------
thereunder, the Seller is not in default, violation or breach in any respect
under any such Lease.  The Seller has delivered or made available to the
Purchaser complete and accurate copies of the written leases and subleases
thereto, including all amendments and modifications pursuant to which the Seller
or any Purchased Subsidiary leases the leased real property on Schedule
                                                               --------
3.1.11(b) (the "Leased Real Property").
- ---------       --------------------

                  (c) Except as disclosed on Schedule 3.1.11(a) or (b), there
                                             -------------------------
are no pending or, to the Knowledge of the Seller, threatened, and neither the
Seller nor any Purchased Subsidiary has received written notice of, condemnation
or eminent domain proceedings against any Owned Real Property or Leased Real
Property. Except as disclosed on Schedule 3.1.11(a) or (b), neither the Seller
                                 -------------------------
nor any Purchased Subsidiary has received any notice from any city, village or
other Governmental Authority of, or otherwise has any Knowledge of, any zoning,
ordinance, building, fire or health code or other legal violation in respect of
any Owned Real Property or Leased Real Property, other than immaterial
violations.

                  (d) The Leased Real Property and Owned Real Property
constitutes, in the aggregate, all of the real property related to the Business
and used to conduct such Business as currently conducted. There are no pending
or, to the Seller's Knowledge, threatened Actions regarding the amount of the
Taxes on, or the assessed valuation of, the Owned Real Property or Leased Real
Property, or relating to impact fees, special assessments or similar matters
with respect thereto.

          3.1.12. Environmental Matters.  Except as set forth on Schedule
                  ---------------------                          --------
3.1.12:
- ------

                  (a) the Owned Real Property is and has been at all times
during Seller's or any Purchased Subsidiary's ownership thereof in compliance in
all material respects with all Environmental Laws and with all Governmental
Approvals that are required pursuant to Environmental Laws for the operation of
the Business as currently conducted;

                  (b) Seller's and each Purchased Subsidiary's use of the Leased
Real Property is, and at all times has been, in compliance in all material
respects with all Environmental Laws and with all Governmental Approvals that
are required pursuant to Environmental Laws for the operation of the Business or
the respective businesses of the Purchased Subsidiaries as currently conducted;

                                      -19-
<PAGE>

                  (c) the Seller has not received any written notice of any
material violation of or any material liability arising under Environmental Laws
relating to the Owned Real Property or Leased Real Property;

                  (d) none of the Seller or any Purchased Subsidiary has
expressly assumed or undertaken any liability or corrective or remedial
obligation of any other Person relating to Environmental Laws;

                  (e) no Environmental Lien has attached to any Leased Real
Property for which any Purchased Subsidiary has any payment or remediation
obligation, or to any Owned Real Property or Purchased Assets or, to Seller's
Knowledge, to any Leased Real Property; and

                  (f) To the Seller's Knowledge, no Owned Real Property or
Leased Real Property, and no property to which Hazardous Substances originating
on or from Owned Real Property or Leased Real Property or the Purchased Assets
has been sent for treatment, storage, or disposal, is listed or proposed to be
listed on the National Priorities List or CERCLA or on any other governmental
database, register, record or list of all properties that may or do require
investigation or cleanup under Environmental Laws.

          3.1.13. Employees, Labor Matters, etc.  The Seller is not a party to
                  -----------------------------
or bound by any collective bargaining agreement and there are no labor unions or
other organizations representing or purporting to represent any employees
employed in the operation of the Business. To the Seller's Knowledge, taking
into account the Seller's status as a chapter 11 debtor, the Seller has no
material labor relations problem with respect to employees of the Seller
(including any union organization activities, threatened or actual strikes or
work stoppages or material grievances).  Schedule 3.1.13 hereto lists all of the
                                         ---------------
Seller's current employees and their respective dates of hire.

          3.1.14. Employee Benefit Plans.
                  ----------------------

                  (a)  Schedule 3.1.14 hereto lists each Employee Benefit Plan
                       ---------------
that the Seller or any ERISA Affiliate sponsors, maintains, contributes to, is
obligated to contribute to, is a party to or is otherwise bound by, or in
connection with which the Seller or any ERISA Affiliate may have any Liability.
The Seller has made available to the Purchaser true, correct and complete copies
of all such Employee Benefit Plans. Each Employee Benefit Plan maintained by
Seller may be terminated without the imposition of any Liability on Purchaser,
any of the Purchased Assets or any Purchased Subsidiary. The Seller, the
Purchased Subsidiaries, and the ERISA Affiliates do not sponsor, maintain or
contribute to, and have not in the past sponsored, maintained or contributed to,
and have no Liabilities in connection with, any plan or arrangement subject to
Title IV of ERISA or any "multiemployer plan" (as defined in Section 3(37) of
ERISA).

                                      -20-
<PAGE>

                 (b)  Either (i) no Purchased Subsidiary sponsors, maintains,
contributes to, is obligated to contribute to, is a party to or is otherwise
bound by, or has any Liability in connection with any Employee Benefit Plan; or
(ii) each Employee Benefit Plan which a Purchased Subsidiary sponsors,
maintains, contributes to, is obligated to contribute to, is a party to or is
otherwise bound by may, except as specifically identified on Schedule 3.1.14, be
                                                             ---------------
terminated at any time without the imposition of any Liability on the Purchaser
or the Purchased Subsidiary.

                 (c)  Schedule 3.1.14 lists (i) each person who has elected
                      ---------------
continuation coverage under ERISA sections 601 through 609 ("COBRA Coverage"),
                                                             --------------
or has a rightto elect COBRA Coverage, and (ii) with respect to each such person
who has elected or who is entitled to elect COBRA Coverage, the date and type of
his or her qualifying event.

                 3.1  Subsidiaries.  Each of the Purchased Subsidiaries is a
                      ------------
corporation duly organized, validly existing and in good standing under the laws
of the jurisdiction of its incorporation. The attached Schedule 3.1.15  sets
                                                       ---------------
forth the name of each Purchased Subsidiary and the jurisdiction of its
incorporation. The Seller owns all of the issued and outstanding capital stock
of each Purchased Subsidiary free and clear of any Encumbrance (collectively,
the "Shares").  Each Purchased Subsidiary has the requisite corporate power and
     ------
authority to own, operate or lease its properties and to carry on its business
as it is now being conducted, and is duly qualified or licensed to do business,
and is in good standing, in each jurisdiction in which the nature of its
business or the properties owned, operated or leased by it makes such
qualification, licensing or good standing necessary, except where the failure to
have such power or authority, or the failure to be so qualified, licensed or in
good standing, would not have a Material Adverse Effect.  Schedule 3.1.15 also
                                                          ---------------
lists all of the Shares of the Purchased Subsidiaries by number, class and
par/no par value.  The Shares are the only outstanding capital Shares of the
Purchased Subsidiaries.  There are no outstanding options, warrants, calls,
agreements, arrangements, understandings, preemptive rights, acquisition rights
or any other rights or claims of any character to purchase or otherwise acquire
any of the Shares or any securities convertible into such Shares which restrict
the transfer or voting of, require the issuance of, or otherwise relate to the
Shares.  The Shares are duly authorized, validly issued, fully paid and
nonassessible.  The information set out in the Schedule 3.1.15 is true, complete
                                               ---------------
and accurate in all material respects.  The Shares specified in Schedule 3.1.15
                                                                ---------------
constitute the entire issued and allotted share capital of the Purchased
Subsidiary opposite whose name they are set and all such Shares are fully paid
up.  There are in existence no agreements or arrangements which confer on any
Person or Persons any right to call for the issue, allotment or transfer of any
of the Shares or authorized but unissued securities of any Purchased Subsidiary.
Copies of the articles of association or by-laws or other organizational
documents of each of the Purchased Subsidiaries have been supplied or made
available to the Purchaser or its legal advisers.  All such copies are complete
and accurate in all respects, have attached to them copies of all resolutions

                                      -21-
<PAGE>

and other documents required by Applicable Law to be so attached, and fully set
out the rights and restrictions attaching to each class of share capital to
which they relate.

          3.1.16.  Subsidiaries -- Tax Matters.
                   ---------------------------

                   (a) Each of the Purchased Subsidiaries has duly and timely
filed with the appropriate Governmental Authorities, all federal, territorial,
state, local and foreign Tax Returns and reports due with respect to all Taxes
in any jurisdiction where such filing is necessary for the conduct of the
respective businesses conducted by the Purchased Subsidiaries (collectively, the
"Purchased Subsidiaries' Tax Returns").

                   (b) All Taxes imposed upon or required to be collected or
withheld by each of the Purchased Subsidiaries have been (i) properly and fully
withheld and paid, to the extent due and payable, or properly and fully
deposited to the extent required to be collected or withheld and deposited, and
(ii) adequately reserved (in accordance with GAAP) in the case of Taxes payable
or anticipated to be payable on account of the operations, acts or omissions of
the relevant Purchased Subsidiaries, or in the case of Taxes collected or
withheld and not yet deposited. No Purchased Subsidiary is delinquent in the
payment of any Taxes shown on each Purchased Subsidiaries' Tax Return and no
Purchased Subsidiary has requested any extension of time within which to pay any
such Taxes, except to the extent that such Taxes have since been paid. There is
no agreement, waiver or consent providing for an extension of time with respect
to the assessment of any Tax or Tax deficiency against any of the Purchased
Subsidiaries. There is no claim or deficiency for any Taxes which has been
asserted or threatened against any of the Purchased Subsidiaries. There is no
Action, investigation, audit or claim now pending against or with respect to any
of the Purchased Subsidiaries with regard to any Taxes, nor has any claim for
additional Taxes or assessment of Taxes been asserted by any Governmental
Authority.

          3.1.17.  Brokers, Finders, etc.  All negotiations relating to this
                   ---------------------
Agreement and the transactions contemplated hereby have been carried on without
the participation of any Person acting on behalf of the Seller in such manner as
to give rise to any valid claim against the Purchaser for any brokerage or
finder's commission, fee or similar compensation.

          3.1.18.  Safety and Health.  The Seller is in compliance in all
                   -----------------
material respects with the requirements of the Occupational Safety and Health
Act of 1970, as amended and the regulations promulgated thereunder and the
Health and Safety at Work Act of 1974 and all applicable regulations made under
this Act and any similar laws or regulations of any state or local jurisdiction
("OSHA"), the Americans with Disabilities Act of 1990, as amended ("ADA") and
  ----                                                              ---
all other applicable optional safety and health legal requirements. The Seller
has not received any citation from the Occupational Safety and Health, any
relevant Government Authority or any Government Authority inspector setting
forth any respect in which the facilities or operations of the Seller relating
to the Purchased Assets or the Business are not in compliance

                                      -22-
<PAGE>

with OSHA, ADA or other applicable safety and health requirements in any
material respect, or the regulations under such acts, which non-compliance has
not been corrected or remedied without monetary penalty and to the satisfaction
of such Government Authority or inspector. The Seller has heretofore provided or
made available to the Purchaser copies of all health and safety policies and
procedures, committees, and any complaints, recommendations, investigations or
claims relating to health and safety made or undertaken in the last five (5)
years and affecting the Business or any of Seller or any of the Purchased
Subsidiaries, all material citations heretofore issued to the Seller under OSHA,
ADA or other applicable safety and health requirements and copies of all
material correspondence from and to the Government Authority and any inspectors
therefrom during the past three (3) years relating to the Purchased Assets or
the Business.

          3.1.19. Accounts Receivable.  All Accounts Receivable of Seller were
                  -------------------
acquired in the ordinary course of the Business.  The calculation of the
Estimated A/R delivered to Purchaser by Seller prior to the Closing Date
pursuant to Section 1.2.3 hereto includes a true, complete and accurate list as
of the Effective Closing Date of the total amount of Accounts Receivables
(billed and unbilled) and the aging of such Accounts Receivable based on the
following Schedule:  0-30 days, 31-60 days, 61-90 days and over 90 days, from
the date thereof.

          3.1.20. Other Items Estimate.  The calculation of the Other Items
                  --------------------
Estimate delivered to Purchaser by Seller prior to the Closing Date pursuant to
Section 1.2.3 hereto contains a true, complete and accurate list as of the
Effective Closing Date of the Other Items. Schedule 1.1.1(n) contains a true and
correct list of vendor deposits and prepaid expenses of Seller (other than
Purchased Carrier Prepayments) as of the Effective Closing Date.

          3.1.21. PTGI Notes.
                  ----------

                  (a) The Seller is acquiring the PTGI Notes for purposes of
investment, for the account of the Seller, and with no present intention of
reselling, distributing or otherwise transferring the PTGI Notes or any portion
of the PTGI Notes, except in accordance with the Securities Act and the rules
and regulations promulgated thereunder, and the Seller has no contract,
undertaking or arrangement with any person or entity to sell or transfer all or
any portion of the PTGI Notes to that person or entity, or to have that person
or entity sell for it all or any portion of the PTGI Notes, or to afford or
allow any participation in the PTGI Notes by any other person or entity.

                  (b) The Seller believes that it has the knowledge and
experience in business and financial matters that make the Seller capable of
evaluating the merits and risks of an investment in the PTGI Notes. The Seller
has carefully reviewed and understands the risks of an investment in PTGI and is
able to bear the economic risk of an investment in the PTGI Notes.

                                      -23-
<PAGE>

                  (c) The Seller acknowledges and agrees that the PTGI Notes are
being offered and sold in reliance on exemptions from the registration
requirements of the Securities Act, and that each such PTGI Note will contain
substantially the following legend:

          THE NOTE EVIDENCED HEREBY HAS NOT BEEN REGISTERED UNDER THE SECURITIES
          ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE OR OTHER
          SECURITIES LAWS.  THIS NOTE IS BEING OFFERED AND SOLD IN RELIANCE ON
          EXEMPTIONS FROM THE REGISTRATION REQUIREMENTS OF SAID ACT AND SUCH
          LAWS. NEITHER THIS NOTE NOR ANY INTEREST OR PARTICIPATION HEREIN MAY
          BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR
          OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION EXCEPT UPON
          THE ISSUANCE TO THE COMPANY OF A FAVORABLE OPINION OF HOLDER'S
          COUNSEL, OR SUBMISSION TO THE COMPANY OF SUCH OTHER EVIDENCE AS MAY BE
          REASONABLY SATISFACTORY TO COUNSEL FOR THE COMPANY, TO THE EFFECT THAT
          ANY SUCH TRANSFER SHALL NOT BE IN VIOLATION OF THE SECURITIES ACT OR
          ANY STATE OR OTHER SECURITIES LAWS.  THIS NOTE IS FURTHER SUBJECT TO
          RESTRICTIONS CONTAINED IN THE ASSET AND STOCK PURCHASE AGREEMENT DATED
          JUNE 30, 1999 BY AND BETWEEN  TELEGROUP, INC. AND PRIMUS
          TELECOMMUNICATIONS GROUP, INCORPORATED, A COPY OF WHICH MAY BE
          OBTAINED FROM THE SECRETARY OF THE COMPANY UPON REQUEST.

The Seller and the Purchaser agree that the Purchaser shall use its best efforts
to cause the foregoing legend to be removed upon registration of the PTGI Notes
and other customary circumstances.

                 (d) The Seller realizes that there presently is no public
market for the PTGI Notes and the Seller may not be able to liquidate its
investment in the PTGI Notes or to pledge the PTGI Notes as collateral for
loans.

                 (e) The Seller has been furnished materials relating to PTGI
consisting of the Indenture dated as of January 29, 1999 between PTGI and First
Union National Bank, as the same may be amended or supplemented from time to
time (the "Indenture"), PTGI's quarterly report on Form 10-Q for the period
           ---------
ended March 31, 1999, and PTGI's Form S-4 filed with the SEC on May 6, 1999.

                 (f) The Seller has been given access to full and complete
information regarding PTGI and has utilized that access to its satisfaction for
the purpose of obtaining

                                      -24-
<PAGE>

information concerning PTGI, an investment in the PTGI Notes and the terms and
conditions of the issuance of the PTGI Notes, and has either attended or been
given reasonable opportunity to attend a meeting with representatives of PTGI
for the purpose of asking questions of, and receiving answers from, these
representatives concerning PTGI, an investment in the PTGI Notes and the terms
and conditions of the issuance, and for the purpose of obtaining any additional
information to the extent reasonably available that is necessary to verify the
information provided.

                  (g) The Seller has obtained, in its judgment, sufficient
information to evaluate the merits and risks of an investment in PTGI,
understands the business in which PTGI is engaged and is able to evaluate the
merits and risks of an investment in the PTGI Notes.

                  (h) The Seller confirms that it has been advised that it
should rely on its own professional accounting, tax, legal, and financial
advisors with respect to an investment in PTGI and a purchase of the PTGI Notes,
and obtained, to the extent it deems necessary, the Seller's own personal
professional advice with respect to the risks inherent in an investment in the
PTGI Notes and to the suitability of an investment in the PTGI Notes in light of
the Seller's financial condition and investment needs.

          3.1.22. Disclosure; Veracity of Statements.  No representation or
                  ----------------------------------
warranty contained in this Agreement or in any Other Seller Document and no
statement contained in any Exhibit or Schedule hereto or in the certificates
furnished to Purchaser, contains any untrue statement of a material fact or
omits to state a material fact necessary in order to make the statements herein
or therein, in the light of the circumstances under which they were made, not
misleading.

     3.2  Representations and Warranties of the Purchaser.  The Purchaser
          -----------------------------------------------
represents and warrants to the Seller as of the date hereof and as of the
Closing Date (except for Section 3.2.6 which is made only as of the Closing
Date) as follows:

          3.2.1.  Corporate Status.  The Purchaser is a corporation duly
                  ----------------
organized, validly existing and in good standing under the laws of the State of
Delaware.

          3.2.2.  Authorization, etc.  The Purchaser has the corporate power and
                  ------------------
authority to execute and deliver this Agreement, to perform fully its
obligations hereunder, and to consummate the transactions contemplated hereby.
The execution and delivery by the Purchaser of this Agreement, and the
consummation of the transactions contemplated hereby, have been duly authorized
by all requisite corporate action of the Purchaser.  This Agreement is a legal,
valid and binding obligation of the Purchaser, enforceable against it in
accordance with its respective terms, except as such enforceability may be
limited by (a) applicable insolvency,

                                      -25-
<PAGE>

bankruptcy, reorganization, moratorium or other similar laws affecting
creditors' rights generally and (b) applicable equitable principles (whether
considered in a proceeding at law or in equity).

          3.2.3.  No Conflicts, etc.  The execution, delivery and performance by
                  ------------------
the Purchaser of this Agreement, and the consummation of the transaction
contemplated hereby, do not and will not conflict with or result in a violation
of or a default under (with or without the giving of notice or the lapse of time
or both) (a) any Applicable Law applicable to the Purchaser, (b) the certificate
of incorporation or by-laws or other organizational documents of the Purchaser
or (c) any material contract, agreement or other instrument to which the
Purchaser is a party or by which the Purchaser is bound.

          3.2.4.  Litigation.  There is no Action pending, or to the Purchaser's
                  ----------
Knowledge threatened, against or relating to the Purchaser or against or
relating to the transactions contemplated by this Agreement.

          3.2.5.  Available Funds.  The Purchaser has, or will have on the
                  ---------------
Closing Date, sufficient funds available to consummate this Agreement in
accordance with its terms (including the payment of any post-closing amounts
required hereunder) and otherwise has the wherewithall to satisfy its post-
Closing obligations hereunder.

          3.2.6.  Reliance. The Purchaser is entering into this transaction
                  --------
based on its reasonable investigation of the Seller, the Purchased Assets and
the Assumed Liabilities and, except for the specific representations and
warranties made by the Seller in Section 3.1 et seq., is not relying upon any
                                             --- ----
representation or warranty of the Seller or any Affiliate thereof or any
officer, director, employee, agent or advisor of any of them, nor upon the
accuracy of any record, projection or statement made available or given to the
Seller in the performance of such investigation.

          3.2.7.  Brokers, Finders, etc.  All negotiations relating to this
                  ---------------------
Agreement and the transaction contemplated hereby, have been carried on without
the participation of any Person acting on behalf of the Purchaser in such manner
as to give rise to any valid claim against the Seller for any brokerage or
finder's commission, fee or similar compensation.

                                      -26-
<PAGE>

                                  ARTICLE IV

                             PRE-CLOSING COVENANTS
                             ---------------------

     4.1  HSR Act, FCC Approvals and Other Regulatory Approvals.
          -----------------------------------------------------

          4.1.1   The Purchaser and the Seller shall (i) promptly make or cause
to be made the filings required of such Party or any of its subsidiaries under
the HSR Act or with any other Governmental Authority with respect to the
transactions contemplated by this Agreement, (ii) comply at the earliest
practicable date with any request under the HSR Act or under any other
Applicable Law, for additional information, documents or other material received
by such party or any of its subsidiaries from the United States Federal Trade
Commission or the United States Department of Justice or the FCC or any other
Governmental Authority in respect of such filings or such transactions, and
(iii) cooperate with the other Party in connection with any such filing and in
connection with resolving any investigation or other inquiry of any such agency
or other Governmental Authority under relevant Antitrust laws or
telecommunications laws. Each Party shall promptly inform the other Party of any
communication with, and any proposed understanding, undertaking, or agreement
with any Governmental Authority regarding any such filings or any such
transaction.

          4.1.2.  Each of the Purchaser and Seller shall use all reasonable
efforts to take such action as may be required to cause the expiration of the
notice periods with the FCC or under the HSR Act or any state statutes, rules,
regulations orders or decrees that are designed to prohibit, restrict or
regulate actions with respect to the transactions contemplated hereby as
promptly as possible after the execution of this Agreement; provided, that, with
respect to filings under the HSR Act, the Parties shall request early
termination of the HSR Act waiting period in at most seven days.

          4.1.3.  The Purchaser shall bear the filing fee due under the HSR Act.

     4.2  Pre-Closing Covenants.
          ---------------------

          4.2.1.  Conduct of the Business of the Seller.  From the date hereof
                  -------------------------------------
to the Closing Date, except as expressly permitted or required by this Agreement
or as otherwise consented to by the Purchaser in writing (which consent shall
not be unreasonably withheld or delayed), the Seller shall and shall cause each
of the Purchased Subsidiaries (and Telegroup Hong Kong Ltd.) to

          (a) not take any action with respect to its business other than in the
ordinary course except as contemplated by this Agreement (taking into account
the Seller's status

                                      -27-
<PAGE>

as a chapter 11 debtor) and except for the sale or other disposition of the
Excluded Assets or issued share capital of the Excluded Subsidiaries);

               (b) not declare or pay any dividend;

               (c) not amend its Articles of Incorporation or Bylaws or other
governing document;

               (d) not take any action that may or could reasonably be expected
to have a Material Adverse Effect on the value of the Purchased Assets or assets
of Purchased Subsidiaries or the assets of Telegroup Hong Kong Ltd.;

               (e) not grant charges or any other Encumbrances upon any of the
Purchased Assets or the assets of Telegroup Hong Kong Ltd.; except with its
approved debtor-in-possession financing and use of cash collateral;

               (f) not dispose of any assets other than in the ordinary course
of business except the Excluded Assets or issued share capital of the Excluded
Subsidiaries;

               (g) keep in full force and effect its corporate existence;

               (h) not increase compensation, except as set forth in Schedule
                                                                     --------
3.1.10 hereto and other than for regularly scheduled increases in the ordinary
course of business.

               (i) not merge or consolidate with, or otherwise acquire, any
business entity.

               (j) cause any intercompany accounts payable owed by a Purchased
Subsidiary to an Excluded Subsidiary to be transferred to and assumed by Seller
and any intercompany accounts receivable owed to a Purchased Subsidiary by an
Excluded Subsidiary to be transferred to Seller.

The Purchaser shall refrain from imposing any undue burden upon the Seller and
from interfering with the operations and conduct of the Seller.  If the Seller
gives written notice to the Purchaser that the Seller proposes to take any
action for which the Purchaser's consent is required pursuant to this Section
4.2.1 and if  Purchaser has not delivered to the Seller a written objection to
such proposed action within three (3) Business Days of such notice, then the
Purchaser will be deemed to have consented to such proposed action.
Notwithstanding anything to the contrary contained herein, no action taken by
the Seller at the request of the Purchaser following May 26, 1999,  or the
results thereof shall be deemed to be a breach of this Agreement or be deemed to
constitute a Material Adverse Effect.

                                      -28-
<PAGE>

          4.2.2.  Maintenance of, and Access to, Records.  From the date of this
                  --------------------------------------
Agreement until the Closing Date for confirmatory purposes of the Purchaser's
due diligence investigation, the Seller shall provide (and shall cause the
Purchased Subsidiaries to provide) the Purchaser with reasonable access (with an
opportunity to make copies at Purchaser's expense), during normal business
hours, and upon reasonable notice, to its books and records which relate to the
Purchased Assets, the Business, and the Purchased Subsidiaries.  For purposes of
such confirmatory due diligence, until the Closing Date, the Seller shall
provide (and shall cause the Purchased Subsidiaries to provide) the Purchaser
and its officers, employees, agents, counsel, accountants, financial advisors,
consultants and other representatives (together "Representatives") with
reasonable access, and during normal business hours, to all officers, employees,
agents and accountants of each of the Seller and the Purchased Subsidiaries and
their respective assets and books and records pertaining thereto, and shall
furnish the Purchaser and such Representatives with all such information and
data (including without limitation copies of agreements, books and records,
etc.) concerning the Purchased Assets, the Business or the Purchased
Subsidiaries as the Purchaser or any of such other Representatives reasonably
may request in connection with such investigation.  Nothing contained in this
Section 4.2.2 or other investigation by or disclosure to the Purchaser  or the
Representatives shall affect the survival of, modify, limit or create, any
exception to the representations, warranties, covenants, agreements and
indemnities of the Seller hereunder, or of the conditions to the obligations of
the Purchaser to close as set forth in this Agreement.

          4.2.3.  Pre-Closing Actions.
                  -------------------

                  (a) From the date hereof to the Closing Date, the Parties
agree to use reasonable efforts to take all actions and to do all things
necessary, proper or advisable to consummate the transactions contemplated
hereby by the expected Closing Date (including satisfaction, but not waiver, of
the closing conditions set forth in Sections 5.1 and 5.2 ).

                  (b) At all times prior to the Closing, each Party shall notify
the other in writing of any fact, condition, event or occurrence that will
result in the failure of any of the conditions contained in Article V to be
satisfied promptly upon such Party becoming aware of the same.

                  (c) In the event the order granting Bankruptcy Court approval
shall be appealed, the Seller shall use all reasonable efforts to defend such
appeal.

                  (d) After entry of the Sale Order, subject to the
nondisturbance obligations of Section 4.2.2, the Purchaser shall have reasonable
access to all Owned Real Property and Leased Real Property and to all employees
of Seller or the Purchased Subsidiaries for any reason relating to the
transition of the Business to Purchaser. In addition, after entry of the Sale
Order, the Seller shall, and shall cause each Purchased Subsidiary to, use best
efforts to

                                      -29-
<PAGE>

consult with Purchaser and make reasonable accommodation for Purchaser's
suggestions relating to the ongoing operation of the Business.

                  (e) Seller shall arrange to amend or replace, as the case may
be, as of the Closing Date or as of the earliest possible day after the Closing
Date, the bank account operating documents (including signatory and
authorization cards) with respect to all of the bank accounts of the Purchased
Subsidiaries, in accordance with the instructions from the Purchaser, including,
without limitation, to cause the officers and directors of the Purchased
Subsidiaries to adopt, before or after the Closing Date as circumstances warrant
and Purchaser instructs, resolutions required by applicable financial
institutions to effect such amendment or replacement.

          4.2.4.  Notification.  Prior to the Closing, each Party shall promptly
                  ------------
notify the other if such Party obtains knowledge that any representation or
warranty of it in this Agreement or the Schedules hereto is not true and correct
in all material respects.

          4.2.5.  Termination of Encumbrances.  If and to the extent not removed
                  ---------------------------
by the Bankruptcy Court pursuant to the Sale Order, Seller shall use all
reasonable efforts to obtain, and arrange for the filing of, all UCC-3
termination statements and any other necessary instruments to terminate all
Encumbrances and to obtain releases of such Encumbrances, including, without
limitation, those set forth on Schedule 3.1.8 and Schedule 3.1.11(a) or (b)
                               --------------     -------------------------
hereto.

          4.2.6.  Preparation and Execution of Related Purchase Agreement.
                  -------------------------------------------------------
Prior to and after the Closing, Seller shall cause Telegroup Hong Kong Ltd. to
prepare, execute and close under an asset agreement (on the terms and conditions
satisfactory to Purchaser) pursuant to which Purchaser (or Purchaser's
designated Affiliate) will purchase substantially all of the assets of Telegroup
Hong Kong Ltd., including, without limitation, the assets described in category
5 of Schedule 1.1.1(a) free and clear of all Encumbrances of whatever kind (the
     -----------------
"Related Purchase Agreement").  The Related Purchase Agreement shall contain
 --------------------------
representations and warranties similar in content to those set forth herein,
which representations and warranties shall survive the closing thereunder as and
to the same extent as set forth in Section 9.1 of this Agreement with respect to
the representations and warranties contained herein.  The Seller shall cause
Telegroup Hong Kong Ltd. to provide Purchaser (or Purchaser's designated
Affiliate) from the date hereof to the closing date under the Related Purchase
Agreement with the type of access to information for due diligence purposes, the
cooperation regarding any requisite governmental filings, and the necessary
efforts to consummate the transactions contemplated by the Related Purchase
Agreement, as is afforded Purchaser under Sections 4.1, 4.2.2 and 4.2.3 of this
Agreement.  The Purchaser will treat and hold as such any confidential
information it receives from the Seller or any of its Affiliates or any of their
respective agents or representatives in confidence.

                                      -30-
<PAGE>

                                   ARTICLE V

            CONDITIONS PRECEDENT TO THE ASSET PURCHASE TRANSACTION
            ------------------------------------------------------

     5.1  Conditions to Obligations of Each Party.  The obligations of the
          ---------------------------------------
Parties to consummate the transaction contemplated hereby shall be subject to
the fulfillment on or prior to the Closing Date of the following conditions:

          5.1.1. HSR Act Notification and FCC Approvals.  In respect of the
                 --------------------------------------
notifications of the Purchaser and the Seller pursuant to the HSR Act, the
applicable waiting period and any extensions thereof shall have expired or been
terminated and all necessary approvals of transfer of control of the licenses of
the Purchased Subsidiaries and other approvals, consents or waivers from the FCC
and similar agencies outside the United States shall have been obtained.

          5.1.2. No Injunction, etc.  Consummation of the transactions
                 ------------------
contemplated hereby shall not have been restrained, enjoined or otherwise
prohibited by any order, injunction, decree or judgment of any court or other
governmental authority.

          5.1.3. Escrow Agreement.  The Seller, the Purchaser and the Escrow
                 ----------------
Agent shall have executed and delivered the Escrow Agreement and the Other
Escrow Agreement.

     5.2  Conditions to Obligations of the Purchaser.  The obligations of the
          ------------------------------------------
Purchaser to consummate the transactions contemplated hereby shall be subject to
the fulfillment on or prior to the Closing Date of the following additional
conditions:

          5.2.1. Representations; Covenants.  The representations and warranties
                 --------------------------
of the Seller contained in Section 3.1 of this Agreement shall be true and
correct in all material respects at and as of the Closing Date and the Seller
shall have duly performed and complied in all material respects with all
covenants, agreements and conditions required by this Agreement to be performed
or complied with by it on or prior to the Closing Date.

          5.2.2. Board Approval.  The Seller shall have delivered to the
                 --------------
Purchaser certified copies of the resolutions duly adopted by the Seller's board
of directors authorizing the execution, delivery and performance of this
Agreement, the Other Seller Documents and each of the other agreements
contemplated hereby.

          5.2.3. Discharge and Satisfaction of Encumbrances.  The Seller shall
                 ------------------------------------------
have satisfied and taken all steps necessary to discharge or cause the discharge
of all Encumbrances on any of the Purchased Assets, including, without
limitation, all Encumbrances set forth on Schedule 3.1.8 and Schedule 3.1.11(a)
                                          --------------     ------------------
or (b).
- ------

                                      -31-
<PAGE>

          5.2.4. Noncompete. The Seller shall have entered into a non-
                 ----------
competition agreement in the form of the agreement attached hereto as Exhibit C.
                                                                      ---------

          5.2.5. No Material Adverse Effect.   No Material Adverse Effect shall
                 --------------------------
have occurred.

          5.2.6. Headquarters.
                 ------------

                 (a)  Seller and Purchaser shall have entered into an Agreement
of Sale of Real Estate (the "HQ Agreement of Sale"), providing for the purchase
                             --------------------
by Purchaser of Seller's undivided sixty-five percent (65%) tenant-in-common
ownership interest in and to the Headquarters Building in substantially the form
attached hereto as Exhibit D.
                   ---------

                 (b)  Seller, Purchaser and Golden Gate shall have entered into
an Assignment and Assumption Agreement substantially in the form attached hereto
as Exhibit E, pursuant to which all of Purchaser's right, title and interest in
   ---------
and to the HQ Agreement of Sale is assigned to Golden Gate, Golden Gate accepts
and assumes all of Purchaser's obligations and responsibilities under the HQ
Agreement of Sale and Purchaser is released from all liability and
responsibility under the HQ Agreement of Sale, and Golden Gate agrees to
discharge its mortgage on the Headquarters Building and cancel the indebtedness
secured by such mortgage concurrently with completion at closing under the HQ
Agreement of Sale.

                 (c)  Primus Telecommunications, Inc. shall have entered into a
Lease Agreement with Seller and Mary K. Miller, an adult individual, tenants-in-
common, as landlord, in substantially the form attached hereto as Exhibit F,
                                                                  ---------
pursuant to which the Headquarters Building is leased to Primus
Telecommunications, Inc. on the terms and conditions set forth therein.

          5.2.7. NPC/Portland Switch.  The Seller and the Purchaser shall have
                 -------------------
entered into a transition services agreement in substantially the form of

Exhibit G hereto with respect to the NPC IRU and Portland Switch Site assets
- ---------
described in categories 4b and 4c of Schedule 1.1.1(a) hereto (the "NPC/Portland
                                     -----------------              ------------
Switch Assets") for a term of no more than two (2) months commencing on the
- -------------
Closing Date pursuant to which the Purchaser will be entitled to use and have
access to the NPC/Portland Switch Assets for a total consideration of $61,000
per month in which Purchaser uses the NPC/Portland Switch Assets.

          5.2.8. Related Purchase Agreement. Telegroup Hong Kong Ltd. shall have
                 --------------------------
prepared, executed and delivered to Purchaser the Related Purchase Agreement.

          Any condition specified in this Section 5.2 may be waived by the
Purchaser, provided that no such waiver will be effective unless it is set forth
           -------- ----
in a writing executed by the

                                      -32-
<PAGE>

Purchaser or unless the Purchaser agrees to consummate the transactions
contemplated by this Agreement without satisfaction of such condition.

     5.3  Conditions to Obligations of the Seller.  The obligation of the Seller
          ---------------------------------------
to consummate the transactions contemplated hereby shall be subject to the
fulfillment, on or prior to the Closing Date, of the following additional
conditions:

          5.3.1. Representations; Covenants.  The representations and warranties
                 --------------------------
of the Purchaser contained in Section 3.2 of this Agreement shall be true and
correct in all material respects at and as of the Closing Date and the Purchaser
shall have duly performed and complied in all material respects with all
agreements and conditions required by this Agreement to be performed or complied
with by it prior to or on the Closing Date.

          5.3.2. Board Approval. The Purchaser shall have delivered to the
                 --------------
Seller certified copies of the resolutions duly adopted by the Purchaser's board
of directors authorizing the execution, delivery and performance of this
Agreement and each of the other agreements contemplated hereby.

          Any condition specified in this Section 5.3 may be waived by the
Seller, provided that no such waiver will be effective unless it is set forth in
        -------- ----
a writing executed by the Seller or unless the Seller agrees to consummate the
transaction contemplated by this Agreement without satisfaction of such
condition.


                                  ARTICLE VI

                        OTHER COVENANTS AND AGREEMENTS
                        ------------------------------

     6.1  Covenants and Agreements of the Seller.
          --------------------------------------

          6.1.1. Further Assurances. Following the Closing, the Seller shall
from time to time execute and deliver such additional instruments, documents,
conveyances or assurances and take such other actions as shall be necessary, or
otherwise reasonably requested by the Purchaser, to confirm and assure the
rights and obligations provided for in this Agreement, the Other Seller
Documents, the Related Purchase Agreement, and render effective the consummation
of the transaction contemplated hereby. In furtherance and not in limitation of
the foregoing, Seller shall, after the Closing and to the extent such
Encumbrances are not removed by the Sale Order, use all reasonable efforts to
obtain, and arrange for the filing of, all UCC-3 termination statements and any
other necessary instruments to terminate all Encumbrances and to obtain releases
of such Encumbrances, including, without limitation, those set forth on Schedule
                                                                        --------
3.1.8 and Schedule 3.1.11(a) or (b) hereto.
- -----     -------------------------

                                      -33-
<PAGE>

          6.1.2.  Seller's Use of Telegroup Name. The Seller acknowledges that
                  ------------------------------
the "Telegroup" name and the names of each of the Subsidiaries are Purchased
Assets which entitle the Purchaser to the exclusive ownership and use thereof
and covenants that at the Closing or as soon thereafter as is practicable (but
in no event later than the seventh Business Day after the Closing Date), it will
not use (except as may be required in the Chapter 11 Case) any corporate or
other name, mark, logo, trade name or trademark incorporating "Telegroup, Inc.",
"Telegroup," "Spectra" or "Global Access" in any business and the Seller shall
cause its name to be changed to a name dissimilar to "Telegroup," "Spectra" or
"Global Access." Notwithstanding anything to the contrary contained herein, the
Seller shall have the royalty-free right to use the name "Telegroup" as
necessary in the Chapter 11 Case, in any pleading in the Bankruptcy Court and
any other Action and for use of its bank accounts and the Excluded Subsidiaries.

          6.1.3.  Cash Collections.  For ninety (90) days following the Closing
                  ----------------
Date, the Seller will perform a daily sweep of the Bank Accounts into a bank
account or accounts designated by the Purchaser.  Seller shall provide Purchaser
with an accounting of any amounts received in Bank Accounts which represent
payment of accounts receivable owed to Seller by carriers, and Purchaser shall,
absent dispute, remit any such amounts to Seller.

          6.1.4.  Seller's Covenant to Provide Additional Information with
                  --------------------------------------------------------
Respect to Purchaser's SEC Filings.   Seller acknowledges that, from time to
- ----------------------------------
time after the date of this Agreement, Purchaser may be engaged in financing and
other transactions in which Purchaser will be required to deliver, as part of
offering materials, which may take the form of a prospectus or offering
memorandum for purposes of the Securities Act, financial information relating to
Seller for pre-Closing periods, and that, in order to do so, it must obtain the
consent or approval of Seller's independent auditors, KPMG LLP.  Seller hereby
consents to the inclusion in any prospectus, offering materials or other
transaction documents of such historical financial information regarding Seller
and, in connection therewith, hereby agrees to cooperate fully to (i) facilitate
the delivery to Purchaser of such financial or other information regarding
Seller, (ii) to obtain the consent or other approval by KPMG LLP to the use of
such historical financial information regarding Seller, and (iii) cause to be
provided to Purchaser (including, without limitation, by requesting its
appropriate officers to take such actions and execute such consents, letters,
documents and instruments as are appropriate), on a timely basis and consistent
with past practice, as and when reasonably requested by Purchaser,  all such
consents, letters, documents and instruments as Purchaser, its independent
auditors or KPMG LLP shall reasonably request, including, but not limited to,
management representation letters and confirmations from Seller's outside
counsel regarding the status of pending and threatened litigation.  Seller
acknowledges and agrees that a failure on its part to perform the obligations
set forth in this Section 6.1.4 would result in irreparable harm to Purchaser
and that monetary damages would not adequately compensate Purchaser, and Seller
hereby waives its right to argue that an adequate remedy at law exists with
respect to any such failure.  Accordingly Seller hereby agrees that Purchaser
shall be

                                      -34-
<PAGE>

entitled to injunctive or other equitable relief, without the requirement that a
bond be posted, upon any breach or threatened breach by Seller of the provisions
of this Section 6.1.4.

          6.1.5. Covenants Regarding Certain Employees of Telegroup KK.  Seller
                 -----------------------------------------------------
hereby covenants and agrees that it will remain and be fully responsible for all
liabilities, costs, fines, payments and expenses of whatever kind (including
reasonable attorneys' fees) relating to, or arising from, any obligations
(contractual or otherwise) to pay severance or other post-termination employment
benefits to any of the part-time employees of Telegroup KK on or prior to the
Closing Date (the "Severance Liabilities").  The parties acknowledge and agree
                   ---------------------
that the amount deposited by Purchaser with the Escrow Agent under the Other
Escrow Agreement pursuant to Section 1.2.2(c)(iii) for the purpose of providing
a source of available funds for payment of  Severance Liabilities shall not be
Purchaser's exclusive remedy or recourse in this regard.  Rather, Seller shall
remain liable for all Severance Liabilities in excess of the amounts so
deposited by Purchaser with the Escrow Agent for this purpose.

          6.1.6. Subsidiary Bank Accounts.  To the extent not effected on or
                 ------------------------
prior to the Closing Date, Seller shall take all steps required of Seller to
arrange to amend or replace, as the case may be, the bank account operating
documents (including signatory and authorization cards) with respect to all of
the bank accounts of the Purchased Subsidiaries, in accordance with instructions
from the Purchaser.

          6.1.7. PTGI Notes.  In the event Purchaser issues any PTGI Notes
                 ----------
pursuant to Section 1.2.2, Seller will not offer, sell, assign, transfer,
pledge, encumber or otherwise dispose of  such PTGI Notes or any interest or
participation therein for a period of four weeks from the Closing Date.
Thereafter, Seller may sell, transfer, pledge, encumber or otherwise dispose of
the PTGI Notes in its discretion, except that it will not do so without the
consent of Purchaser (which shall not be unreasonably withheld), at less than
the par value thereof or in volumes which could reasonably be expected to be
detrimental to the then existing trading market for notes issued under the
Indenture.  Notwithstanding the foregoing, the limitations on transfer set forth
in this Section 6.1.7 shall not apply after one hundred twenty (120) days
following the Closing Date.

          6.1.8. Cancellation of Licenses.  Following the Closing, the Seller
                 ------------------------
will take all steps necessary to cancel the Seller's licenses and authorizations
to provide telecommunications services issued by the FCC and the various states
of the United States to the extent required by applicable law.

          6.1.9  Southern Cross Consent.  Seller hereby directs Primus to, and
                 ----------------------
Primus agrees that it will, cause Telegroup Nederlands, B.V. to transfer to
Seller, for no additional consideration, the deposit on the Southern Cross Cable
pursuant to the Southern Cross IRU Agreement identified as item 6j of Schedule
                                                                      --------
1.1.1(a) hereto.  Seller shall obtain all necessary
- --------

                                      -35-
<PAGE>

third-party consents to the transfer of the deposit on the Southern Cross Cable
made pursuant to Section 4.2.1(j) hereof.

     6.2  Covenants and Agreements of the Purchaser.
          -----------------------------------------

          6.2.1. Post-Closing Access and Information.
                 -----------------------------------

                 (a) From time to time after the Closing Date, the Purchaser
will (and will cause each of its Affiliates and its Affiliates' respective
accountants, counsel, consultants, employees and agents to) give the Seller and
its accountants, counsel, consultants, employees and agents, reasonable access,
during normal business hours and upon reasonable notice, to all employees,
documents, records, work papers and information with respect to the Seller's and
the Purchased Subsidiaries' properties, assets, books, contracts, commitments,
reports and records relating to the Seller and/or the Purchased Assets for a
reasonable business purpose (including, for example, the preparation of the
Seller's tax returns), as the Seller may from time to time reasonably request.
In addition, the Purchaser shall permit the Seller to make copies at its own
expense of any of the above mentioned documents, records and information.

                 (b) Subject to the following provisions of this Section
6.2.1(b), the Purchaser will retain all books and records relating to the Seller
for at least four years or for such longer period as may be required by
Applicable Law. In the event the Purchaser wishes to discard and dispose of such
books and records or any portion thereof it will notify the Seller in writing
and allow the Seller to take possession thereof. If the Seller does not respond
to such notice within 30 days and does not take possession of such books and
records within 60 days, the Purchaser shall be free to discard and dispose of
such books and records in any manner it deems appropriate in its sole
discretion.

          6.2.2. PTGI Notes.  In the event Purchaser issues any PTGI Notes
                 ----------
pursuant to Section 1.2.2, PTGI shall

                 (a)  file a registration statement with the SEC registering the
resale by the Seller of the PTGI Notes (the "Registration Statement"). If PTGI
                                             ----------------------
does not cause the Registration Statement to be declared effective by the SEC
within one hundred twenty (120) days after the Closing Date (a "Registration
                                                                ------------
Default"), additional cash interest ("Liquidated Damages") shall accrue on the
- -------                               ------------------
PTGI Notes commencing upon the occurrence of such Registration Default in an
amount equal to .50% per annum of the principal amount of PTGI Notes. The amount
of Liquidated Damages shall increase by an additional .50% per annum of the
principal amount of PTGI Notes with respect to each subsequent 90 day period (or
portion thereof) until the Registration Default has been cured, up to a maximum
rate of Liquidated Damages of 1.5% per annum of the principal amount of PTGI
Notes. Immediately upon the cure

                                      -36-
<PAGE>

of the Registration Default, there shall be no further accrual of Liquidated
Damages with respect to the PTGI Notes; and

               (b)  pay any reasonable and customary expense incurred by Seller
in the sale of such PTGI Notes in a private placement or brokered transaction
pursuant to which all or substantially all of the PTGI Notes are sold in one (or
one series of) non-registered or registered transactions in accordance with the
Securities Act and applicable state securities laws.

          6.2.3. Cash Management Costs.  The Purchaser shall be responsible
                 ---------------------
for any and all reasonable costs and expenses, including credit card, bank and
other similar processing fees and charges, incurred by the Seller after the
Closing Date in connection with the Purchaser's use of the Seller's existing
cash management system and accounts, including with American National Bank &
Trust Company or it successor bank.

     6.3  EXPENSES.  Except as otherwise provided herein, each of the Seller and
          --------
the Purchaser will bear their respective obligations and expenses (including
legal fees and expenses) incurred in connection with this Agreement or arising
as a result of the transaction contemplated hereby.

     6.4  FIRPTA Affidavit.  The Seller is a "domestic corporation" within the
          ----------------
meaning of Sections 7701(a)(3) and (4) of the Code and Section 1.897-1 (j) of
the applicable Treasury Regulations (a "Domestic Corporation") and shall deliver
                                        --------------------
to the Purchaser at Closing an affidavit (a "FIRPTA Affidavit") in form and
                                             ----------------
substance reasonably satisfactory to the Purchaser duly executed and
acknowledged, certifying that the Seller is a Domestic Corporation.  The Seller
shall deliver to Purchaser at Closing an affidavit, in form and substance
reasonably satisfactory to the Purchaser, duly executed and acknowledged,
certifying, for purposes of Section 897 of the Code, that each Purchased Asset
that is a United States real property interest within the meaning of Section
897(c) of the Code is, and has been held by, and will be transferred to the
Purchaser by, a Domestic Corporation.


                                  ARTICLE VII

                                  TERMINATION
                                  -----------

     7.1  Ability to Terminate.  The Parties may terminate this Agreement as
          --------------------
provided below:

          7.1.1.  the Purchaser and the Seller may terminate this Agreement by
mutual written consent at any time prior to the Closing;

                                      -37-
<PAGE>

          7.1.2.  the Purchaser may terminate this Agreement by giving written
notice to the Seller if any of the conditions set forth in Section 5.1 or 5.2
shall have become incapable of fulfillment, and shall not have been waived by
the Purchaser (unless the failure results primarily from the Purchaser breaching
any representation, warranty, or covenant contained in this Agreement);

          7.1.3.  the Seller may terminate this Agreement by giving written
notice to the Purchaser if any of the conditions set forth in Sections 5.1 or
5.3 shall have become incapable of fulfillment, and shall not have been waived
by the Seller (unless the failure results primarily from the Seller breaching
any representation, warranty, or covenant contained in this Agreement); and

          7.1.4.  by the Seller, on the one hand, or the Purchaser, on the other
hand, if the Closing does not occur on or prior to July 7, 1999.

     7.2  Effect of Termination.  If any Party terminates this Agreement
          ---------------------
pursuant to Section 7.1, all rights and obligations of the Parties hereunder
shall terminate without any liability of any Party to the other Party; provided,
                                                                       --------
however, that the provisions contained in Sections 4.2 (Confidentiality), 6.3
- -------
(Expenses),  and (to the extent applicable) Articles IX and X shall survive
termination; and provided, further, that any termination of this Agreement
                 --------  -------
pursuant to Sections 7.1.2 and 7.1.3 by reason of any breach of any
representation and warranty or failure to perform or comply with any covenant or
other agreement contained herein shall not relieve the breaching or defaulting
Party from any liability for breach of contract to the other Party hereto.

     7.3  Procedure upon Termination.  In the event of termination pursuant to
          --------------------------
Section 7.1, written notice thereof will be immediately given to the other Party
and the transactions contemplated by this Agreement will be terminated, without
any further action by any Party, subject to Section 7.2.  If the transactions
contemplated by this Agreement are terminated as provided herein, each Party
will return all documents, work papers and other materials of the other Party,
whether obtained prior to or after the execution of this Agreement, to the Party
furnishing the same.


                                  ARTICLE VII

                              EXECUTORY CONTRACTS
                              -------------------

     8.1  Assumption and Assignment.  The Material Contracts listed in Schedule
          -------------------------                                    --------
3.1.10 are sometimes referred to herein as the "Executory Contracts."
- ------                                          -------------------

               (a) Until entry of a Confirmation Order (as defined in the Sale
Order) the Seller shall exercise its Best Efforts (as defined in the Sale Order)
to prevent the rejection or

                                      -38-
<PAGE>

termination of any of the Executory Contracts other than unexpired leases of
nonresidential real property ("Nonresidential Leases"), except at the written
                               ---------------------
request of the Purchaser.

               (b) Until July 30, 1999, the Seller shall exercise its Best
Efforts (as defined in the Sale Order) to prevent the rejection or termination
of any of Seller's unexpired Nonresidential Leases, except at the written
request of the Purchaser.

               (c) The Seller shall use its Best Efforts (as defined in the Sale
Order) to obtain Bankruptcy Court approval to extend the aforementioned June 30
deadline to July 30, 1999.

               (d) The Seller shall obtain an order from the Court authorizing
the Seller to assign and the Purchaser to assume the Executory Contracts through
the following procedures:

                   (i)   the Purchaser shall designate in a writing (an
"Assumption Notice") by June 30, 1999 those Non-Residential Leases (by the date
 -----------------
of the lease (if available), the other party to the lease and the address of
such party) it desires to assume from the Seller and for the Seller to assign to
the Purchaser (the "Assumed Leases"); provided that the Seller shall use its
                    --------------
Best Efforts (as defined in the Sale Order) to obtain an extension of such June
30 deadline from the Bankruptcy Court.

                   (ii)  the Purchaser may provide an Assumption Notice from
time to time and at any time prior to entry of a Confirmation Order (as defined
in the Sale Order) with respect to all other Executory Contracts; provided,
however, that Purchaser shall not submit more than one Assumption Notice during
any ten (10) day period nor more than eight (8) Assumption Notices in the
aggregate.

                   (iii) Whenever Seller shall receive an Assumption Notice from
the Purchaser, the Seller shall by the later of July 10, 1999 or five (5) days
following receipt of such Assumption Notice send notice to the affected non-
debtor parties to such Assumed Contracts of the Seller's effort to obtain Court
approval of such assumption and assignment (an "Assumption Motion") and
                                                -----------------
requesting consent to such assumption. Such Assumption Motion shall set forth
the Cure Amount applicable to each such Assumed Contract.  In cases in which the
Seller is unable to establish that a default exists, the relevant Cure Amount
shall be set at $0.00, subject to Bankruptcy Court approval.  The Cure Amounts
with respect to each Executory Contract, as determined by the Seller based on
its books and records as of the Closing Date, are set forth on Schedule 8.1
                                                               ------------
hereto.

               (e) With respect to those Executory Contracts for which an
Assumption Notice is delivered by the Purchaser to the Seller, the Purchaser
shall pay (and

                                      -39-
<PAGE>

provide Seller with evidence of such payment) on the date the Assumption Motion
with respect thereto is approved by the Bankruptcy Court, pursuant to Section
365(b)(i) of the Bankruptcy Code, the Cure Amounts set forth on Schedule 8.1 for
                                                                ------------
each of such Assumed Contracts and no amounts other than such Cure Amounts shall
be required to be paid by Purchaser to assume such Assumed Contracts.  To the
extent that the Cure Amount is determined to be greater than the amount set
forth on Schedule 8.1 with respect to such Assumed Contract, the Seller shall
         ------------
pay (and provide Purchaser with evidence of such payment), on the date the
Assumption  Motion is approved, the excess of the Cure Amount over the amount
set forth in Schedule 8.1. Notwithstanding the foregoing, the Purchaser shall
             ------------
not be responsible for Cure Amounts with respect to any Assumed Contracts with
agents of Seller except those agents to which Seller has not paid commissions
since March 2, 1999 and which have not generated any revenues from new customers
since March 2, 1999.

               (f) Subject to Section 8.1(e) above and except for Vendor
Deposits and Customer Deposits, Purchaser shall not be liable for any
obligations of Seller arising under any Assumed Contracts and relating solely to
time periods prior to the effective date of the assumption and assignment
thereof.

               (g) The Seller shall request that the only adequate assurance of
future performance required under Section 365(f)(2) of the Bankruptcy Code is
the Purchaser's promise to perform its obligations under the Assumed Contracts.

               (h) The Purchaser may designate in a writing to Seller (a
"Rejection Notice") from time to time Executory Contracts which it desires the
Seller to reject and which the Purchaser will not assume; provided, however,
that the Purchaser shall not submit more than one Rejection Notice during any
ten (10) day period, nor more than eight (8) Rejection Notices in the aggregate.

               (i) For the period commencing on June 1, 1999 until the first
Business Day after the effective date of the earlier of the assumption and
assignment of, or the rejection of, any Executory Contract, the Purchaser shall
be responsible for payment when due of the amounts due from the Seller under
such Executory Contracts (and/or any stipulations entered into regarding post-
petition payments to the non-debtor parties to such contracts).

                                      -40-
<PAGE>

                                  ARTICLE IX

                                   INDEMNITY
                                   ---------

     9.1  Survival.  All covenants and agreements contained in Sections 1.1.3,
          --------
1.2.2(e), 1.2.3, 1.2.4, 1.2.5, 1.2.6, 4.2.3(e), 4.2.5, 4.2.6, Articles VI and
VIII, this Article IX, and Section 10.10 of this Agreement shall survive the
Closing Date and the consummation of the transactions contemplated hereby.  The
representations and warranties set forth in Section 3.1.5 (to the extent related
solely to the Purchased Subsidiaries or, in the case of the last sentence of
Section 3.1.5, to Seller or any Purchased Subsidiary), the first sentence of
Section 3.1.8, the third sentence of Section 3.1.15 of this Agreement, shall
survive the Closing for a period of six (6) months.  The second sentence of
Section 3.1.20 shall survive the Closing until all Executory Contracts are, or
can no longer be, assumed or rejected in accordance with Article VIII hereof.
All other covenants, agreements, representations and warranties contained in
this Agreement shall not survive the Closing.

     9.2  Indemnification.

          9.2.1. By Seller.  Seller agrees to indemnify and to hold Purchaser,
                 ---------
its affiliates, shareholders, officers, directors, employees, representatives
and agents (the "Indemnified Purchaser Parties") harmless from and against and
                 -----------------------------
in respect of any losses, damages, costs, expenses (including reasonable
attorneys' fees), suits, demands and judgments suffered or incurred
(collectively, "Losses") by the Indemnified Purchaser Parties arising from or
                ------
related to:

                 (a) the obligations owed (prior to their assumption by Seller
pursuant to Section 4.2.1(j) hereof) by any Purchased Subsidiary to any Excluded
Subsidiary which are assumed by Seller pursuant to Section 4.2.1(j) hereof; and

                 (b) any misrepresentation, breach of warranty, or
nonfulfillment of any agreement or covenant on the part of Seller under this
Agreement, or on the part of Seller's Affiliates selling assets to Purchaser or
Purchaser's designated Affiliate under a Related Purchase Agreement, in each
case which survives the Closing pursuant to Section 9.1 or comparable provision
of any Related Purchase Agreement.

                 (c) the occurrence of any Severance Liabilities.

                 (d) claims of trademark infringement made prior to the Closing
Date against Purchased Subsidiaries and identified on Schedule 3.1.5 hereto.

          9.2.2. By Purchaser. Purchaser agrees to indemnify and to hold Seller,
                 ------------
its affiliates, directors, officers, stockholders, representatives and agents
(the "Indemnified Seller
      ------------------

                                      -41-
<PAGE>

Parties") harmless from and against and in respect of any Losses incurred by the
- -------
Indemnified Seller Parties arising from or related to:

                  (a) all liabilities and obligations of Purchaser, and all
claims and demands made in respect thereof relating to or arising from,
Purchaser's actions after the Effective Closing Date with respect to the
Business, or Purchaser's ownership, operation or control of the Purchased Assets
or the Purchased Subsidiaries after the Closing, including on account of the
Assumed Liabilities; and

                  (b) any misrepresentation, breach of warranty, or
nonfulfillment of any agreement or covenant on the part of Purchaser under this
Agreement.

          9.2.3.  Notice of Claims; Defense of Third Party Claim.  A party
                  ----------------------------------------------
claiming indemnification under this Article IX (the "Asserting Party") must
                                                     ---------------
promptly notify (in writing and in reasonable detail) the party from which
indemnification is sought (the "Defending Party") of the nature and basis of
                                ---------------
such claim for indemnification.  Any such notice pursuant to Section 9.2.1(b) or
9.2.2(b) shall be given, if at all, not later than the last day of the survival
period for the representation being breached as set forth in Section 9.1 hereof.
If such claim relates to a claim, litigation or other Action by a third party
against the Asserting Party or any fixed or contingent liability to a third
party (a "Third Party Claim"), the Defending Party may elect to assume and
          -----------------
control the defense of the Third Party Claim at its own expense with counsel
selected by the Defending Party from and after such time as the Defending Party
unconditionally agrees in writing to accept, as against the Asserting Party, all
liabilities on account of such Third Party Claim. Assumption of such liability,
as against the Asserting Party, shall not be deemed an admission of liability as
against any such third party. Notwithstanding the foregoing, the Defending Party
may not assume or control the defense if the named parties to the Third Party
Claim (including any impleaded parties) include both the Defending Party and the
Asserting Party and representation of both parties by the same counsel (in such
counsel's reasonable determination) would be inappropriate due to actual or
potential differing interests between them, in which case the Asserting Party
shall have the right to defend the Third Party Claim and to employ counsel
reasonably approved by the Defending Party, and to the extent the matter is
determined to be subject to indemnification hereunder, the Defending Party shall
reimburse the Asserting Party for the reasonable costs of its counsel. If the
Defending Party assumes liability for the Third Party Claim as against the
Asserting Party and assumes the defense and control of the Third Party Claim
pursuant to this Section 9.2.3, the Defending Party shall not be liable for any
fees and expenses of counsel for the Asserting Party incurred thereafter in
connection with the Third Party Claim (except in the case of actual or potential
differing interests, as provided in the preceding sentence), but shall not agree
to any settlement of such Third Party Claim which does not include an
unconditioned release of the Asserting Party by the third party claimant on
account thereof, provided that such requirement shall be deemed waived to the
extent that the Asserting Party does not undertake to provide and promptly
execute and, concurrently with the

                                      -42-
<PAGE>

delivery of any such release, deliver a corresponding release of the third party
claimant with respect to such Third Party Claim. If the Defending Party does not
assume liability for and the defense of the Third Party Claim pursuant to this
Section 9.2.3, the Asserting Party shall have the right (i) to control the
defense thereof and (ii), if the Asserting Party shall have notified the
Defending Party of the Asserting Party's intention to negotiate a settlement of
the Third Party Claim (at the Defending Party's expense to the extent the matter
is determined to be subject to indemnification hereunder), which notice shall
include the material terms of any proposed settlement in reasonable detail, to
settle the Third Party Claim (at the Defending Party's expense to the extent the
matter is determined to be subject to indemnification hereunder) on terms not
materially inconsistent with those set forth in such notice, unless the
Defending Party shall have notified the Asserting Party in writing of the
Defending Party's election to assume liability for and the defense of the Third
Party Claim pursuant to this Section 9.3 within ten (10) days after receipt of
such notice, and the Defending Party promptly thereafter shall have taken
appropriate action to implement such defense. The Asserting Party shall not be
entitled to settle any such Third Party Claim pursuant to the preceding sentence
unless such settlement includes an unconditional release of the Defending Party
by the Third party claimant on account thereof, provided that such requirement
shall be deemed waived to the extent that the Defending Party does not undertake
to provide and promptly execute and, concurrently with delivery of any such
release, deliver a corresponding release of the third party claimant with
respect to such Third Party Claim. The Asserting Party and the Defending Party
shall use all reasonable efforts to cooperate fully with respect to the defense
and settlement of any Third Party Claim covered by this Article IX.

          9.2.4. Limitations. The obligations to indemnify the Indemnified
                 -----------
Purchaser Parties or the Indemnified Seller Parties, as the case may be,
pursuant to this Article IX shall be subject to the following limitations:

                 (a) In the event the Indemnified Seller Parties have a claim
for indemnification for Losses under this Article IX that arises after the date
of this Agreement but before the Closing Date and Seller elects to terminate the
Agreement pursuant to Section 7.1.3 of this Agreement, then no indemnification
shall be required to be made by Purchaser of the amount of the Indemnified
Sellers Parties' Losses that is in excess of the Escrowed Amount, and Seller's
sole remedy and recourse with respect to such Losses shall be the assertion of
its rights under the Escrow Agreement in respect of the Escrowed Amount.

                 (b) Notwithstanding any provision of this Agreement to the
contrary, neither Seller nor Purchaser shall be obligated to pay under this
Article IX, in the aggregate, an amount in excess of the Purchase Price.

                                      -43-
<PAGE>

                                   ARTICLE X

                                 MISCELLANEOUS
                                 -------------

     10.1. Acknowledgment by the Purchaser.
           -------------------------------

           THE PURCHASER ACKNOWLEDGES AND AGREES THAT IT IS NOT
           RELYING UPON ANY REPRESENTATION OR WARRANTY OF THE
           SELLER (OTHER THAN AS SET FORTH IN SECTION 3.1) OR ANY
           REPRESENTATION OR WARRANTY OF THE SELLER'S AFFILIATES,
           AGENTS OR ADVISORS (INCLUDING, WITHOUT LIMITATION, ANY
           INFORMATION, PROJECTION OR PROMISE CONTAINED IN ANY
           MATERIALS DELIVERED BY OR ON BEHALF OF THE SELLER).
           EXCEPT AS STATED IN SECTION 3.1 HEREOF, THE SELLER IS
           SELLING, AND THE PURCHASER IS ACQUIRING, THE PURCHASED
           ASSETS ON AN "AS IS, WHERE IS" BASIS BUT FREE AND
           CLEAR OF ALL LIENS, CLAIMS AND ENCUMBRANCES AS THAT
           TERM IS DEFINED HEREIN.

     10.2. Severability.  If any covenant, agreement, provision or term of this
           ------------
Agreement is held to be invalid for any reason whatsoever, then such covenant,
agreement, provision or term will be deemed severable from the remaining
covenants, agreements, provisions and terms of this Agreement and will in no way
affect the validity or enforceability of any other provision of this Agreement.

     10.3. Notices.  All notices, requests, demands, waivers and other
           -------
communication required or permitted to be given under this Agreement shall be in
writing and shall be deemed to have been duly given if (i) delivered personally,
(ii) sent by registered or certified mail, return receipt requested, postage
prepaid or (iii) sent by next-day or overnight mail or delivery to the
applicable address set forth below.

If to the Seller:
- -----------------

     Telegroup, Inc.
     2098 Nutmeg Avenue
     Fairfield, IA  52556
     Attention: Charles Johanson
     Facsimile:  (515) 469-4618

                                      -44-
<PAGE>

with a copy to each of (which will not constitute notice to the Seller):
- -----------------------------------------------------------------------

     Telegroup, Inc.
     c/o Alvarez & Marsal, Inc.
     599 Lexington Avenue, Suite 2700
     New York, New York 10022
     Attention: Guy Sansone
     Facsimile: (212) 759-5532

          and

     Kirkland & Ellis
     200 East Randolph Drive
     Chicago, Illinois 60601
     Attention:  James A. Stempel
     Facsimile:  (312) 861-2200

If to the Purchaser:
- -------------------

     Primus Telecommunications Group, Incorporated
     1700 Old Meadow Road
     Suite 300
     McLean, VA 22102
     Attention:  General Counsel
     Facsimile:  703-902-2814

with a copy to (which will not constitute notice to the Purchaser):
- ------------------------------------------------------------------

     Pepper Hamilton LLP
     3000 Two Logan Square
     18th and Arch Streets
     Philadelphia, PA 19103-2799
     Attention:  Julie D. Corelli, Esquire
     Facsimile:  215-981-4750

or, in each case, at such other address as may be specified in writing to the
other Party.

All such notices, requests, demands, waivers and other communications shall be
deemed to have been received (i) if by personal delivery, on the date after such
delivery, (ii) if by certified or registered mail, on the seventh Business Day
after the mailing thereof or (iii) if by next-day or

                                      -45-
<PAGE>

overnight mail or delivery, on the day delivered provided that an additional
                                                 -------- ----
copy is also sent by telecopy (with confirmation of receipt).

     10.4.  Entire Agreement.  This Agreement, the Schedules hereto, the
            ----------------
Exhibits hereto, and any other documents contemplated hereby (when executed and
delivered) constitute the entire agreement and supersede all prior agreements
and understandings, both written and oral, between the Parties with respect to
the subject matter hereof.

     10.5.  Counterparts.  The Parties may execute this Agreement in separate
            ------------
counterparts (no one of which need contain the signatures of both Parties), each
of which shall be deemed an original and all of which together will constitute
one and the same instrument.

     10.6.  Governing Law, Etc.  This Agreement will be governed by and
            ------------------
construed in accordance with the domestic laws of the State of New York, without
giving effect to any choice of law or conflict provision or rule (whether of the
State of New York or any other jurisdiction) that would cause the laws of any
jurisdiction other than the State of New York to be applied. In furtherance of
the foregoing, the internal law of the State of New York will control the
interpretation and construction of this Agreement, even if under such
jurisdiction's choice of law or conflict of law analysis, the substantive law of
some other jurisdiction would ordinarily apply.

     10.7.  Binding Effect.  This Agreement shall be binding upon and inure to
            --------------
the benefit of the Parties and their respective successors and permitted
assigns.

     10.8.  Assignment.  Except as specifically permitted in Section 1.1.4
            ----------
hereof, this Agreement shall not be assignable or otherwise transferable by any
Party hereto without the prior written consent of the other Party hereto.

     10.9   No Third Party Beneficiaries.  Nothing in this Agreement shall
            ----------------------------
confer any rights upon any person or entity other than the Parties and their
respective successors and permitted assigns.

     10.10. 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 prior to the Closing without the prior written approval of the
other Party (such approval not to be unreasonably withheld), except as required
by applicable law.

     10.11. Amendment, Waivers, Etc.  No amendment, modification or discharge of
            -----------------------
this Agreement, and no waiver hereunder, shall be valid or binding unless set
forth in writing and duly executed by the Party against whom enforcement of the
amendment, modification, discharge or waiver is sought. Any such waiver shall
constitute a waiver only with respect to the specific matter described in such
writing and shall in no way impair the rights of the Party granting such

                                      -46-
<PAGE>

waiver in any other respect or at any other time. Neither the waiver by either
of the Parties of a breach of or a default under any of the provisions of this
Agreement, nor the failure by either of the Parties, on one or more occasions,
to enforce any of the provisions of this Agreement or to exercise any right or
privilege hereunder, shall be construed as a waiver of any other breach or
default of a similar nature, or as a waiver of any of such provisions, rights or
privileges hereunder.

     10.12  Captions.  The captions used in this Agreement are for convenience
            --------
of reference only and do not constitute a part of this Agreement and will not be
deemed to limit, characterize or in any way affect the meaning or interpretation
of any provision of this Agreement, and all provisions of this Agreement will be
enforced and construed as if no caption had been used in this Agreement.

     10.13. No Strict Construction; Interpretation.  The language used in this
            --------------------------------------
Agreement will be deemed to be the language chosen by the Parties to express
their mutual intent and no rule of strict construction will be applied against
any Person.

     10.14. Incorporation of Exhibits, Annexes and Schedules.  The Exhibits, and
            ------------------------------------------------
Schedules identified in this Agreement are incorporated herein by reference and
made a part hereof.

                                  ARTICLE XI

                                  DEFINITIONS
                                  -----------

     11.1.  Definition of Certain Terms.  The terms defined in this Section
            ---------------------------
11.1, whenever used in this Agreement (including in the Schedules), shall have
the respective meanings indicated below for all purposes of this Agreement:

            "Accounts Receivable" means gross trade accounts receivables from
             -------------------
Seller's Retail Customers and Callback Customers with respect to the Business,
whether billed or unbilled, all causes of action, claims, and demands related
thereto, excluding the intercompany accounts receivable of Seller.  The term
"Accounts Receivable" does not include the accounts receivable collections of
which comprise Carrier A/R Collections.

            "Action" means any action, suit, arbitration or proceeding by or
             ------
before an Governmental Authority, whether criminal, civil, regulatory or
otherwise.

            "Actual Purchase Price" has the meaning set for in Section 1.2.5(h).
             ---------------------

            "ADA" has the meaning set forth in Section 3.1.18.
             ---

                                      -47-
<PAGE>

          "Affiliate" of a Person means a Person that directly or indirectly
           ---------
through one or more intermediaries, controls, is controlled by, or is under
common control with, the first Person. "Control" (including the terms
                                        -------
"controlled by" and "under common control with") means the possession, directly
- --------------       -------------------------
or indirectly, of the power to direct or cause the direction of the management
policies of a person, whether through the ownership of voting securities, by
contract or credit arrangement, as trustee or executor, or otherwise.

          "Agreement" means this Asset and Stock Purchase Agreement, including
           ---------
the Schedules hereto.

          "Applicable Law" means all applicable provisions of all (i)
           --------------
constitutions, treaties, statutes, laws (including the common law), rules,
regulations, ordinances, codes or orders of any Governmental Authority and (ii)
Governmental Approvals.

          "A/R Promissory Note" has the meaning set forth in Section
           -------------------
1.2.2(d)(ii).

          "A/R Purchase Price" means the sum of the portions of the Purchase
           ------------------
Price payable pursuant to Sections 1.2.1(a)(ii) and (iii).

          "Asserting Party" has the meaning set forth in Section 9.2.3.
           ---------------

          "Assumed Contracts" has the meaning set forth in Section 1.1.1(h).
           -----------------

          "Assumed Leases" has the meaning set forth in Section 8.1(d)(i).
           --------------

          "Assumed Liabilities" means (a) those contractual obligations of the
           -------------------
Seller under the Assumed Contracts which accrue or are to be performed from and
after the later of the Closing Date or the date an Assumed Contract is assigned
to and assumed by the Purchaser pursuant to Article VIII hereof, (b) the
Seller's obligations to provide services with respect to any Customer Deposits,
and (c) personal time of the Seller's employees who are hired by the Purchaser
on the Closing Date which was accrued as of the Closing Date.

          "Assumption Motion" has the meaning set forth in Section 8.1(d)(iii).
           -----------------

          "Assumption Notice" has the meaning set forth in Section 8.1.
           -----------------

          "Bank" has the meaning set forth in Section 5.2.7.
           ----

          "Bank Accounts" has the meaning set forth in Section 1.1.1(o).
           -------------

          "Bankruptcy Code" means Title II of the United States Code, as
           ---------------
amended.

                                      -48-
<PAGE>

          "Bankruptcy Court" has the meaning set forth in the recitals to this
           -----------------
Agreement.

          "Business" has the meaning set forth in the recitals to this
           --------
Agreement.

          "Business Day" means any day other than a Saturday, Sunday or day on
           ------------
which the commercial banks located in the State of New York are closed for
business.

          "Callback Customers" means the retail customers of the Seller's and
           ------------------
Purchased Subsidiaries' call back services (including without limitation, those
services of Seller referred to as "GACB", "Global Access Callback", "VIP" and
"VIP+", excluding any customers of the Excluded Subsidiaries.

          "Carrier A/R Collections" means the collections of the accounts
           -----------------------
receivable of Seller attributable to operation of Seller's wholesale business
prior to the Effective Closing Date which are received after the Effective
Closing Date and prior to the Closing Date, which receivables are all of the
accounts receivable of Seller other than the Accounts Receivable.

          "CERCLA" means the Comprehensive Environmental Response Compensation
           ------
and Liability Act, as amended, 42 U.S.C. (S)9601 et.seq.

          "Chapter 11 Case" has the meaning set forth in the recitals to this
           ---------------
Agreement.

          "Closing" has the meaning set forth in Section 2.1.
           -------

          "Closing Date" has the meaning set forth in Section 2.1.
           ------------

          "Closing Review" has the meaning set forth in Section 1.2.3(a).
           --------------

          "COBRA Coverage" has the meaning set forth in Section 3.1.14(c).
           --------------

          "Code" means the Internal Revenue Code of 1986, as amended.
           ----

          "Communications Laws" means the Communications Act of 1934, as amended
           -------------------
and the rules, precedents and policies of the FCC promulgated thereunder.

          "Consents" means any consent, approval, authorization, waiver, permit,
           --------
grant, franchise, concession, agreement, license exemption or order of,
registration, certificate, declaration of filing with, or report or notice to,
any person, including, but not limited to any Governmental Authority.

                                      -49-
<PAGE>

          "Cure Amount" means, with respect to each Executory Contract, the
           -----------
monetary amount which, if paid to the party(ies) to such Executory Contract
other than Seller, would cure all defaults under such Executory Contract.

          "Customer Deposits" means customer deposits received by Seller from
           -----------------
customers who either (i) are active customers as of the Closing Date, or (ii)
had receivable balances with the Seller as of the Effective Closing Date.

          "Defending Party has the meaning set forth in Section 9.2.3.
           ---------------

          "Domestic Corporation" has the meaning set forth in Section 6.4.
           --------------------

          "Draft Price Calculation" has the meaning set forth in Section
           -----------------------
1.2.5(b).

          "Earnest Money Deposit" has the meaning set forth in Section 1.2.2(b).
           ---------------------

          "Earnest Money Escrow Agreement" has the meaning set forth in Section
           ------------------------------
1.2.2(b).

          "Effective Closing Date" means 11:59 p.m. on May 31, 1999.
           ----------------------

          "Effective Date Net Cash Balance" has the meaning set forth in Section
           -------------------------------
1.1.2(b)(i).

          "Elected Percentage" has the meaning set forth in Section 1.2.2(a).
           ------------------

          "Employee Benefit Plan" means any pension, profit-sharing, stock
           ---------------------
bonus, deferred compensation, bonus, incentive, performance unit, stock option,
phantom stock, stock purchase, restricted stock, premium conversion, medical,
vision, dental, life insurance, disability, severance, dependent care or other
employee benefit plan, program, policy, arrangement, agreement or understanding,
whether written or unwritten, including, without limitation, any "employee
                                                                  --------
benefit plan" as defined in Section 3(3) of ERISA.
- ------------

          "Encumbrances" means mortgages, liens, encumbrances, security
           ------------
interests, claims, charges, or other legal or equitable encumbrances and any
other matters affecting title (including, in the case of real property, rights-
of-way, easements and encroachments), but excluding Permitted Encumbrances.

          "Environmental Laws" means all United States or non-United States
           ------------------
international federal, state and local statutes, regulations, ordinances and
judicial or administrative orders concerning the pollution or protection of the
environment, including without limitation the Clean

                                      -50-
<PAGE>

Air Act, the Clean Water Act, the Solid Waste Disposal Act, the Resource
Conservation and Recovery Act, CERCLA, the Emergency Planning and Community
Right-To-Know Act of 1986.

          "Environmental Lien" means a lien, either recorded or unrecorded, in
           ------------------
favor of any Governmental Authority, relating to any liability of the Seller or
a Purchased Subsidiary arising under Environmental Laws.

          "ERISA" means the Employee Retirement Income Security Act of 1974, as
           -----
amended.

          "ERISA Affiliate" means any entity that, together with Seller or any
           ---------------
Purchased Subsidiary, is a member of a controlled group of corporations (within
the meaning of section 414(b) of the Code), is a trade or business under common
control (within the meaning of section 414(c) of the Code), or is a member of
the same affiliated service group (within the meaning of section 414(m) of the
Code).

          "Escrow Agent" has the meaning set forth in Section 1.2.2(b).
           ------------

          "Escrowed Purchase Price" means the sum of the amounts deposited with
           -----------------------
the Escrow Agent pursuant to Section 1.2.2(c)(ii) and (iii).

          "Estimated A/R" means the estimates of the components of the
           -------------
A/R Purchase Price delivered pursuant to Section 1.2.3.

          "Estimated W/C" means the amount of Net Working Capital estimated by
           -------------
Seller pursuant to Section 1.2.3(d).

          "Exchange Act" shall mean the Securities Exchange Act of 1934, and the
           ------------
rules and regulations promulgated thereunder.

          "Excluded Assets" has the meaning set forth in Section 1.1.2.
           ---------------

          "Excluded Subsidiaries" shall mean PCS Telecom, Inc. (U.S.), Telegroup
           ---------------------
Financial Services Pty Ltd. (Australia), Telegroup International Management Pty.
Ltd, (Australia), Telegroup Network Services Pty Ltd.(Australia), RediCall Pty
Ltd. (Australia), Newsnet ITN Ltd. (Australia), Switch Communications Pty Ltd.
(Australia), Switch Operations Pty Ltd. (Australia), Newsnet Pty Ltd.
(Australia), Newsnet Telecommunications Pty Ltd. (Australia), Newsnet Equity Pty
Ltd. (Australia), Newsnet Message Services Pty Ltd. (Australia), Newsnet
International Pty Ltd. (Australia), Talemax Pty Ltd. (Australia), Management
Technology Co. Pty Ltd. (Australia), Newsnet Investment Pty Ltd., Newsnet Ltd.
(UK) (United Kingdom), Newfax NV (Netherlands Antilles), Netfax BV
(Netherlands), Global Messaging Pty,

                                     -51-
<PAGE>

Faxscape Pty Ltd., Gumtrain Pty Ltd., Deakin Networks Pty Ltd. (Australia),
Telegroup Technologies Ltd. (New Zealand), and Telegroup Network Services New
Zealand Ltd. (New Zealand), Faxline Communications Pty Ltd. (South Africa),
Netnews SDN BHD (Malaysia) Global Access Sales, Inc. (United States), Telegroup
South Europe, Inc. (United States), and Telegroup Technologies, Inc. (United
States). For purposes of this Agreement, Telegroup Hong Kong Ltd. (Hong Kong) is
also considered an Excluded Subsidiary because it is to be the subject of a
Related Purchase Agreement.

          "Executory Contracts" has the meaning set forth in Section 8.1.
           -------------------

          "FCC" has the meaning set forth in Section 3.1.9(a)
           ---

          "Final A/R" has the meaning set forth in Section 1.2.5(d).
           ---------

          "Final Other Items Amount" has the meaning set forth in Section
           -----------------------
1.2.5(f).

          "Final Revenues" has the meaning set forth in Section 1.2.5(c).
           --------------

          "Final W/C" has the meaning set forth in Section 1.2.5(e).
           ---------

          "Financial Statements" has the meaning set forth in Section 3.1.4.
           --------------------

          "Firm" has the meaning set forth in Section 1.2.3(c).
           ----

          "FIRPTA Affidavit" has the meaning set forth in Section 6.4.
           ----------------

          "GAAP" means United States generally accepted accounting principals.
           ----

          "Golden Gate" means Golden Gate Management, L.C., an Iowa limited
           -----------
liability company.

          "Governmental Approval" means any consent, approval, authorization,
           ---------------------
waiver, permit, grant, franchise, concession, agreement, license, exemption or
order of registration, certificate, declaration or filing with, or report or
notice with or to any Governmental Authority.

          "Governmental Authority" means any nation or government, any state or
           ----------------------
other political subdivision thereof, any entity exercising executive,
legislative, judicial, regulatory or administrative functions of or pertaining
to government, including, without limitation, any governmental authority,
agency, department, board, commission or instrumentality of the United States,
any State of the United States or any political subdivision, thereof, and any
tribunal or arbitrator(s) of competent jurisdiction, and any self-regulatory
organization.

                                     -52-
<PAGE>

          "Hazardous Substances" shall mean all explosive or regulated
           --------------------
radioactive materials or substances,  hazardous or toxic substances, reactive,
corrosive, carcinogenic, flammable or hazardous pollutant or other substance,
wastes or chemicals, petroleum or petroleum distillates, natural gas or
synthetic gas, asbestos or asbestos containing materials and all other materials
or chemicals regulated pursuant to any environmental Law including, without
limitation, any "hazardous substance" or "hazardous waste" as defined in
Environmental Laws, materials listed in 49 C.F.R. (S) 172.101, materials defined
as hazardous pursuant to Section 101(14) of CERCLA special nuclear or by-product
material, as defined by the Atomic Energy Act of 1954, 42 U.S.C.A. Sec. 3011 et
                                                                             --
seq. and the regulations promulgated thereto.
- ----

          "Headquarters Building" means the land, buildings and improvements at
           ---------------------
Seller's headquarters at 2094 185th Street, Fairfield, Iowa.

          "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of
           -------
1976, as amended, and rules and regulations promulgated thereunder.

          "HQ Agreement of Sale" has the meaning set forth in Section 5.2.6(a).
           --------------------

          "Indemnified Purchaser Parties" has the meaning set forth in Section
           -----------------------------
9.2.1.

          "Indemnified Seller Parties" has the meaning set forth in Section
           --------------------------
9.2.2.

          "Indenture" has the meaning set forth in Section 3.1.21(e).
           ---------

          "Interim Payments" has the meaning set forth in Section 1.2.5(b).
           ----------------

          "Known" or "Knowledge" means with respect to any Person, either (i)
           -----      ---------
the actual personal knowledge, without independent investigation, of an
individual employed by such Person for whom a significant portion of his or her
duties relates to matters as to which the applicable representation or warranty
is made hereunder, or (ii) the knowledge of any officer or director of such
Person, or any management level employee of such Person and the knowledge that
such officer, director or employee would have if he or she had performed his or
her services and duties on behalf of such Person in the ordinary course in a
reasonably diligent manner, but without additional investigation or inquiry
beyond that required for the discharge of his or her duties in the ordinary
course in a reasonably diligent manner.

          "Latest Balance Sheet" has the meaning set forth in Section 3.1.4.
           --------------------

          "Leased Real Property" has the meaning set forth in Section 3.1.11(b).
           --------------------

                                     -53-
<PAGE>

          "Liability" means any indebtedness, obligation and other liability,
           ---------
whether direct or indirect, and any loss, damage, cost, contingent liability,
loss contingency, unpaid expense, claim, deficiency, guaranty or endorsement of
or by any Person whether or not ascertainable.

          "Licenses" has the meaning set forth in Section 3.1.9(a).
           --------

          "Liquidated Damages" has the meaning set forth in Section 6.2.2(a).
           ------------------

          "Losses" has the meaning set forth in Section 9.2.1.
           ------

          "Material Adverse Effect" means a material adverse effect on the
           -----------------------
financial condition or operating results of the Seller and the Purchased
Subsidiaries (taken as a whole) since, for all purposes other than Article III
hereof, May 26, 1999.  For this purpose, loss or damage of any material portion
of the Purchased Assets or the assets of a material Purchased Subsidiary shall
be considered a Material Adverse Effect regardless of the availability or
adequacy of insurance proceeds.

          "Material Contracts" has the meaning set forth in Section 3.1.10.
           ------------------

          "Multiemployer Plan" has the meaning as defined in Section 3(37) of
           ------------------
ERISA.

          "Net Working Capital" has the meaning set forth in Section 1.2.1
           -------------------

          "Non-assumed Liabilities" has the meaning set forth in Section 1.1.3.
           -----------------------

          "Non-residential Leases" has the meaning set forth in Section 8.1.
           ----------------------

          "NPC/Portland Switch Assets" has the meaning set forth in Section
           --------------------------
5.2.7.

          "Objection Notice" has the meaning set forth in Section 1.2.5(b).
           ----------------

          "OSHA" has the meaning set forth in Section 3.1.18.
           ----

          "Other Escrow Agreement" means either the escrow agreement entered
           ----------------------
into by Purchaser and Seller on the Closing Date, in form and substance
reasonably satisfactory to Purchaser, Seller and the escrow agent thereunder, or
the amendment and restatement of the Earnest Money Escrow Agreement executed at
Closing by Purchaser, Seller and the escrow agent, which amendment and
restatement is in form and substance reasonably satisfactory to Purchaser,
Seller and the Escrow Agent, in either case relating to the Escrowed Purchase
Price.

          "Other Items" has the meaning set forth in Section 1.2.5(a)(iv).
           -----------

                                     -54-
<PAGE>

          "Other Items Estimate" means the sum of the estimates of Other Items
           --------------------
delivered pursuant to Section 1.2.3 (other than clauses (a) and (c) thereof).

          "Other Seller Documents" has the meaning set forth in Section 3.1.2.
           ----------------------

          "Owned Real Property" has the meaning set forth in Section 3.1.11(a).
           -------------------

          "Parties" has the meaning set forth in the recitals of this Agreement.
           -------

          "Permitted Encumbrances" means (i) liens for taxes, assessments and
           ----------------------
governmental charges or liens which are either not yet due or being contested in
good faith by diligent proceeding; (ii) deposits, liens or pledges made in
connection with, or to secure payment of, performance of bids or trade
contracts, surety and appeal bonds, performance bonds, compensation,
unemployment insurance, old age pensions or other social security obligations
that are not due and payable or which are being contested in appropriate
proceedings; (iii) operating leases or purchase money security interests in any
property acquired by the Seller in the ordinary course of business; (iv)
statutory interests or title of a lessor under any lease disclosed in the
schedules to this Agreement; (v) carriers', warehousemen's, statutory mechanics,
materialmen's or contractors' liens or encumbrances or any similar statutory
lien which is not filed and for which no amounts are past due or in dispute and
other like liens arising in the ordinary course of business and securing
obligations not yet due and payable; (vi) zoning restrictions, easements,
rights-of-way, restrictions, licenses, covenants, conditions, rights of way and
other similar charges and encumbrances not interfering with the ordinary conduct
of the business of the Seller or materially detracting from the value of the
Purchased Assets;  (viii) the mortgages on the Headquarters Building, (ix) the
capital lease on the Seller's Harris Switch located in New York, and (x) liens
outstanding on the date hereof and listed in Schedule 11 to this Agreement which
                                             -----------
individually or collectively do not have a Material Adverse Effect.

          "Person" means an individual, a partnership, a corporation, an
           ------
association, a limited liability company, a joint stock company, a trust, a
joint venture, an unincorporated organization and a Governmental Authority.

          "Petition Date" has the meaning set forth in the recitals to this
           -------------
Agreement.

          "Preliminary Revenues" has the meaning set forth in Section 1.2.5(c).
           --------------------

          "Proprietary Rights" means any and all (i) patents, patent
           ------------------
applications, registered trademarks, service marks, trade names, (ii)
trademarks, service marks or tradenames for which applications to register have
been made, (iii) corporate and fictitious names, (iv) registered copyrights and
copyrights for which applications to register have been made, (v) domain names,
and (vi) internet protocol addresses and ranges.

                                     -55-
<PAGE>

          "PTGI" means Primus Telecommunications Group, Incorporated.
           ----

          "PTGI Notes" means new unregistered 11 1/4% Senior Notes due 2009
           ----------
issued by PTGI in connection with this Agreement having an aggregate principal
amount as calculated under Section 1.2.2(a) hereof and otherwise having the
terms and conditions set forth in the Indenture.

          "Purchase Price" has the meaning set forth in Section 1.2.1.
           --------------

          "Purchased Assets" has the meaning set forth in Section 1.1.1.
           ----------------

          "Purchased Carrier Prepayments" has the meaning set forth in Section
           ----------------------------
1.1.1(p).

          "Purchased Subsidiary" and collectively "Purchased Subsidiaries" means
           --------------------                    ----------------------
each of Telegroup Network Services Danmark ApS (Denmark); TeleContinent, S.A.
(France), Telegroup Deutschland GmbH (Germany), Telegroup Network Services
Deutschland GmbH (Germany), Telegroup Italia S.r.l. (Italy), Telegroup Nederland
B.V. (Netherlands), Telegroup International B.V. (Netherlands), Global Access
Pty Ltd. (South Africa), Telegroup Network Services SA (Switzerland), Telegroup
(UK) Limited (United Kingdom), South East Telecom Limited (United Kingdom),
Phone Centre Limited (United Kingdom), Corporate Networks Limited (United
Kingdom), and Telegroup KK.

          "Purchased Subsidiaries' Tax Returns" has the meaning set forth in
           -----------------------------------
Section 3.1.16(a).

          "Purchaser" has the meaning set forth in the recitals to this
           ---------
Agreement.

          "Reasonable Efforts" means reasonable efforts which are commercially
           ------------------
reasonable under the circumstances, excluding the payment of any money or other
consideration to any person or entity or the commencement of any litigation,
arbitration or other Action.

          "Registration Statement" has the meaning set forth in Section 6.2.2.
           ----------------------

          "Registration Default" has the meaning set forth in Section 6.2.2(a).
           ---------------------

          "Rejection Notice" has the meaning set forth in Section 8.1.
           ----------------

          "Related Purchase Agreement" has the meaning set forth in Section
           --------------------------
4.2.6.

          "Relevant Period" shall mean the 1st to the 31st of March, 1999.
           ---------------

                                     -56-
<PAGE>

          "Representatives" has the meaning set forth in Section 4.2.2.
           ---------------

          "Retail Customers" shall mean the customers with retail postpaid and
           ----------------
prepaid revenues of the Seller's and the Purchased Subsidiaries' direct dial
telephone services (including, without limitation, those services of Seller
referred to as "Spectra," "GAD," "GAUSA," "US Card," and "Global Access Direct"
and excluding any customers of the Excluded Subsidiaries and wholesale
customers, and Callback Customers;

          "Revenues" means total revenues earned  by the Seller and the
           --------
Purchased Subsidiaries during the Relevant Period in accordance with GAAP.

          "Sale Order" has the meaning set forth in the recitals to this
           ----------
Agreement.

          "SEC" means the Securities and Exchange Commission.
           ---

          "Securities Act" means the Securities Act of 1933, as amended.
           --------------

          "Seller" has the meaning set forth in the recitals to this Agreement.
           ------

          "Severance Liabilities" has the meaning set forth in Section 6.1.5.
           ---------------------

          "Shares" has the meaning set forth in Section 3.1.15.
           ------

          "Subsidiaries" means all of the Purchased Subsidiaries and the
           ------------
Excluded Subsidiaries.

          "Tariffs" has the meaning set forth in Section 3.1.9(d).
           -------

          "Tax" means any federal, state, local, or foreign income, gross
           ---
receipts, license, payroll, employment, excise, stamp, occupation, franchise,
withholding, social security, unemployment, disability, real property, personal
property, sales, use or transfer tax, value added tax, including any interest,
penalty, or addition thereto, whether disputed or not.

          "Tax Return" means any return, report, declaration, form, claim for
           ----------
refund or information return or statement relating to Taxes, including any
schedule or attachment thereto, and including any amendment thereof.

          "Telegroup KK" means Telegroup Japan Kabushiki Kaisha (Japan).
           ------------

          "Third Party Claim" has the meaning set forth in Section 9.2.3.
           -----------------

                                     -57-
<PAGE>

          "Unaudited Financial Statements" has the meaning set forth in Section
           ------------------------------
3.1.4.

          "Vendor Deposits" has the meaning set forth in Section 1.1.1(n).
           ---------------

          "W/C Escrowed Amount" has the meaning set forth in Section
           -------------------
1.2.2(c)(i).

     11.  OTHER DEFINITIONAL PROVISIONS.
          -----------------------------

          11.  Certain Terms.  The terms "hereof," "herein" and "hereunder" and
               -------------
terms of similar import are references to this Agreement as a whole and not to
any particular provision of this Agreement. The term "including" as used in this
Agreement is used to list items by way of example and shall not be deemed to
constitute a limitation of any term or provision contained herein.  As used in
this Agreement, the singular or plural number shall be deemed to include the
other whenever the context so requires. Section, paragraph, clause, Exhibit and
Schedule references contained in this Agreement are references to sections,
clauses and schedules in or to this Agreement, unless otherwise specified.

          11.  Laws.  Any references 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 requires otherwise.  Any reference to
any particular law or regulation will be interpreted to include any revision of
or successor to such law or regulation regardless of how it is numbered or
classified.

                                     -58-
<PAGE>

          IN WITNESS WHEREOF, the Parties have duly executed this Asset and
Stock Purchase Agreement as of the date first above written.


                              PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED



                              By: /s/ Neil L. Hazard
                                  _________________________________________
                                  Name:  Neil L. Hazard
                                  Title: Executive Vice President and
                                         Chief Financial Officer


                              TELEGROUP, INC.



                              By: /s/ David G. Walsh
                                  _________________________________________
                                  Name:  David G. Walsh
                                  Title: President and
                                         Chief Executive Officer

                                     -59-

<PAGE>

                                                                     Exhibit 4.1

                         FIRST SUPPLEMENTAL INDENTURE

          THIS FIRST SUPPLEMENTAL INDENTURE dated as of June 30, 1999 (the

"Supplemental Indenture"), between PRIMUS TELECOMMUNICATIONS GROUP,
- -----------------------
INCORPORATED, a Delaware corporation, as issuer (the "Company"), and FIRST UNION
                                                      -------
NATIONAL BANK, a banking association organized and existing under the laws of
the United States, as trustee (the "Trustee").
                                    -------


                             W I T N E S S E T H :
                             - - - - - - - - - -


          WHEREAS, the Company and the Trustee are parties to the Indenture
dated as of January 29, 1999 (as the same may be amended, supplemented or
otherwise modified from time to time, the "Indenture") relating to the Company's
                                           ---------
11 1/4% Senior Notes due 2009 and the Company's 11 1/4% Series B Senior Notes
due 2009 (collectively, the "Notes"); and
                             -----

          WHEREAS, Section 301 of the Indenture permits the issuance, from time
to time, of Additional Notes in an aggregate principal amount not to exceed
$75,000,000; and

          WHEREAS, the Board of Directors of the Company has adopted a
resolution authorizing the Company to enter into this Supplemental Indenture
pursuant to which Additional Notes in an aggregate principal amount of
$45,467,000 shall be issued to Telegroup, Inc., an Iowa corporation
("Telegroup"), in connection with the Company's acquisition of certain assets
and stock of Telegroup and its subsidiaries; and

          WHEREAS, Section 201 of the Indenture permits the Additional Notes to
have such appropriate insertions, omissions, substitutions and other variations
as are required or permitted by the Indenture and to contain such legends as may
be required by law, all as may be set forth in a supplemental indenture; and

          WHEREAS, Section 901 of the Indenture authorizes the Company and the
Trustee, in accordance with the terms thereof, to enter into this Supplemental
Indenture without the consent of the Holders; and

          WHEREAS, the Company has requested the Trustee execute, and the
Trustee has agreed to join in the execution of, this Supplemental Indenture
pursuant to Section 901 of the Indenture on the terms and subject to the
conditions set forth below;

          NOW, THEREFORE, in consideration of the promises and mutual agreements
herein contained, the Company and the Trustee mutually covenant and agree for
the equal and proportionate benefit of the Holders from time to time of the
Notes as follows:
<PAGE>

     ARTICLE 1  AMENDMENTS TO THE INDENTURE.
                ---------------------------

          1.1  Amendment to Section 202 (Restrictive Legends).  Section 202 of
               ----------------------------------------------
the Indenture is hereby amended by adding a paragraph (c) at the end of Section
202 which shall read as follows:

               (c)   Each Additional Note issued pursuant to the First
     Supplemental Indenture  dated as of June 30, 1999, shall bear only the
     following legend on the face thereof:

          "THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
          AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE OR OTHER SECURITIES
          LAWS. THIS NOTE IS BEING OFFERED AND SOLD IN RELIANCE ON EXEMPTIONS
          FROM THE REGISTRATION REQUIREMENTS OF SAID ACT AND SUCH LAWS. NEITHER
          THIS NOTE NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED,
          SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED
          OF IN THE ABSENCE OF SUCH REGISTRATION EXCEPT UPON THE ISSUANCE TO THE
          COMPANY OF A FAVORABLE OPINION OF HOLDER'S COUNSEL, OR SUBMISSION TO
          THE COMPANY OF SUCH OTHER EVIDENCE AS MAY BE REASONABLY SATISFACTORY
          TO COUNSEL FOR THE COMPANY, TO THE EFFECT THAT ANY SUCH TRANSFER SHALL
          NOT BE IN VIOLATION OF THE SECURITIES ACT OR ANY STATE OR OTHER
          SECURITIES LAWS. THIS NOTE IS FURTHER SUBJECT TO RESTRICTIONS
          CONTAINED IN THE ASSET AND STOCK PURCHASE AGREEMENT DATED AS OF JUNE
          30, 1999 BY AND BETWEEN TELEGROUP, INC. AND PRIMUS TELECOMMUNICATIONS
          GROUP, INCORPORATED, A COPY OF WHICH MAY BE OBTAINED FROM THE
          SECRETARY OF THE COMPANY UPON REQUEST."

     ARTICLE 2  THE ADDITIONAL NOTES.
                --------------------

          2.1  The Aggregate Principal Amount.  The aggregate principal amount
               ------------------------------
of Additional Notes to be issued pursuant to this Supplemental Indenture shall
be $45,467,000.

          2.2  The Purchase Price.  The purchase price of the Additional Notes
               ------------------
to be issued pursuant to this Supplemental Indenture shall be $45,467,000.

          2.3  Issuance Date.   The Additional Notes shall be issued to
               -------------
Telegroup on the Closing Date (as such term is defined in that certain Asset and
Stock Purchase Agreement dated as of June 30, 1999 by and between Telegroup and
the Company).

          2.4  Interest Accrual.  Interest shall begin to accrue on the
               ----------------
Additional Notes upon the date of their issuance to Telegroup.


                                      -2-
<PAGE>

          2.5  Series; CUSIP Number.  The Additional Notes shall be deemed to be
               --------------------
of the same series as the Initial Notes and the Exchange Notes and they shall
bear a different CUSIP Number than the Initial Notes and the Exchange Notes.

     ARTICLE 3  MISCELLANEOUS.
                -------------

          3.1  The Trustee.  The recitals contained herein shall be taken as the
               -----------
statements of the Company and the Trustee shall not assume responsibility for,
or be liable in respect of, the correctness thereof.  The Trustee makes no
representation as to, and shall not be liable or responsible for, the validity
or sufficiency of this Supplemental Indenture.

          3.2  Limited Effect.  Except as expressly amended hereby, all of the
               --------------
provisions, covenants, terms and conditions of the Indenture are ratified and
confirmed, and shall remain in full force.

          3.3  Counterparts; Facsimile Signatures.  This Supplemental Indenture
               ----------------------------------
may be executed by one or more parties hereto on any number of separate
counterparts, including by facsimile, and all of said counterparts taken
together shall be deemed to constitute one and the same instrument.

          3.4  GOVERNING LAW.  THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY,
               -------------
AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW
YORK.


                            [Signature Page Follows]

                                      -3-
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed, all as of the date first above written.


                                      PRIMUS TELECOMMUNICATIONS GROUP,
                                      INCORPORATED


Attest: /s/ Robert Stankey            By: /s/ Neil L. Hazard
       _______________________           ___________________________
       Name:  Robert Stankey             Name:  Neil L. Hazard
       Title: Secretary                  Title: Executive Vice President and
                                                Chief Financial Officer


                                      FIRST UNION NATIONAL BANK


Attest: /s/ Kelly A. Pickerel         By: /s/ S.A. McMahon
       ________________________          ___________________________
       Name:  Kelly A. Pickerel          Name:  S.A. McMahon
       Title: Vice President             Title: Vice President


                                      -4-

<PAGE>

                                                                     Exhibit 4.3


     THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR ANY STATE OR OTHER SECURITIES LAWS. THIS NOTE
IS BEING OFFERED AND SOLD IN RELIANCE ON EXEMPTIONS FROM THE REGISTRATION
REQUIREMENTS OF SAID ACT AND SUCH LAWS. NEITHER THIS NOTE NOR ANY INTEREST OR
PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED,
ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION EXCEPT
UPON THE ISSUANCE TO THE COMPANY OF A FAVORABLE OPINION OF HOLDER'S COUNSEL, OR
SUBMISSION TO THE COMPANY OF SUCH OTHER EVIDENCE AS MAY BE REASONABLY
SATISFACTORY TO COUNSEL FOR THE COMPANY, TO THE EFFECT THAT ANY SUCH TRANSFER
SHALL NOT BE IN VIOLATION OF THE SECURITIES ACT OR ANY STATE OR OTHER SECURITIES
LAWS. THIS NOTE IS FURTHER SUBJECT TO RESTRICTIONS CONTAINED IN THE ASSET AND
STOCK PURCHASE AGREEMENT DATED AS OF JUNE 30, 1999 BY AND BETWEEN TELEGROUP,
INC. AND PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED, A COPY OF WHICH MAY BE
OBTAINED FROM THE SECRETARY OF THE COMPANY UPON REQUEST.

                 PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED

                         11 1/4% Senior Note Due 2009

No. 1                                                            CUSIP 741929AF0
                                                                     $45,467,000


          Primus Telecommunications Group, Incorporated, a Delaware corporation
(herein called the "Company," which term includes any successor Person under the
Indenture hereinafter referred to), for value received, hereby promises to pay
to Telegroup, Inc., an Iowa corporation ("Telegroup"), or registered assigns,
the principal sum of $45,467,000 United States dollars on January 15, 2009, at
the office or agency of the Company referred to below, and to pay interest
thereon on July 15, 1999 and semi-annually thereafter on January 15 and July 15
in each year, from June 30, 1999 or from the most recent Interest Payment Date
to which interest has been paid or duly provided for, at the rate of 11 1/4% per
annum, until the principal hereof is paid or duly provided for, and (to the
extent lawful) to pay on demand interest on any overdue interest at the rate
borne by the Notes from the date on which such overdue interest becomes payable
to the date payment of such interest has been made or duly provided for. The
interest so payable, and punctually paid or duly provided for, on any Interest
Payment Date will, as provided in such Indenture, be paid to the Person in whose
name this Note (or one or more Predecessor Notes) is registered at the close of
business on the Regular Record Date for such interest, which shall be the
January 1 or July 1 (whether or not a business Day), as the case may be, next
preceding such Interest Payment Date. Any such interest not so punctually paid
or duly provided for shall forthwith cease to be payable to the Holder on such
Regular Record Date, and such defaulted interest, and ( to the extent lawful)
interest on such defaulted interest at the rate borne by the Notes, may be paid
to the Person in whose name this Note (or one or more Predecessor Notes) is
registered at the close of business on a Special Record Date for the payment of
such Defaulted Interest to be fixed by the Trustee, notice whereof shall be
given to Holders of Notes not less than 10 days prior to such Special Record
Date, or may be paid at any time in any other lawful
<PAGE>

manner not inconsistent with the requirements of any securities exchange on
which the Notes may be listed, and upon such notice as may be required by such
exchange, all as more fully provided in said Indenture.

          The Holder of this Note is entitled to the benefits of the
registration rights set forth in Section 6.2.2 of the Asset and Stock Purchase
Agreement dated as of June 30, 1999 by and between Telegroup and the Company. In
the event that the Company does not cause the Registration Statement to be
declared effective by the SEC within one hundred twenty (120) days after the
Closing Date (a "Registration Default"), additional cash interest ("Liquidated
Damages") shall accrue on this Note commencing upon the occurrence of such
Registration Default in an amount equal to .50% per annum of the principal
amount of this Note. The amount of Liquidated Damages shall increase by an
additional .50% per annum of the principal amount of this Note with respect to
each subsequent 90 day period (or portion thereof) until the Registration
Default has been cured, up to a maximum rate of Liquidated Damages of 1.5% per
annum of the principal amount of this Note. Immediately upon the cure of the
Registration Default, there shall be no further accrual of Liquidated Damages
with respect to this Note.

          Payment of the principal of (and premium and Liquidated Damages, if
any) and interest on this Note will be made at the office or agency of the
Company maintained for that purpose in The City of New York, or at such other
office or agency of the Company as may be maintained for such purpose, in such
coin or currency of the United States of America as at the time of payment is
legal tender for payment of public and private debts; provided, however, that
                                                      --------  -------
payment of interest may be made at the option of the Company (i) by check mailed
to the address of the Person entitled thereto as such address shall appear on
the Note Register or (ii) by transfer to an account maintained by the payee
located in the United States.

          Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

          Unless the certificate of authentication hereon has been duly executed
by the Trustee referred to on the reverse hereof by manual signature, this Note
shall not be entitled to any benefit under the Indenture, or be valid or
obligatory for any purpose.
<PAGE>

          IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated: June 30, 1999                     PRIMUS TELECOMMUNICATIONS GROUP,
                                         INCORPORATED


                                         By  __________________________________

Attest:

______________________________
Authorized Signature



                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

Dated:  June 30, 1999

This is one of the Notes referred to in the within-mentioned Indenture.

                                         FIRST UNION NATIONAL BANK,
                                               as Trustee


                                         By  __________________________________
                                             Authorized Officer
<PAGE>

                            [REVERSE SIDE OF NOTE]

                 PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED

                         11 1/4% Senior Notes Due 2009

          This Note is one of a duly authorized issue of notes of the Company
designated as its 11 1/4% Senior Notes Due 2009 (herein called the "Notes"),
limited (except as otherwise provided in the Indenture referred to below) in
aggregate principal amount to $275,000,000 ($200,000,000 of which was previously
issued on January 29, 1999), which may be issued under an indenture, dated as of
January 29, 1999, as supplemented by a first supplemental indenture, dated as of
June 30, 1999, as the same may be further amended or supplemented from time to
time (herein called the "Indenture"), between the Company and First Union
National Bank, trustee (herein called the "Trustee", which term includes any
successor trustee under the Indenture), to which Indenture and all indentures
supplemental thereto reference is hereby made for a statement of the respective
rights, limitations of rights, duties, obligations and immunities thereunder of
the Company, the Trustee and the Holders of the Notes, and of the terms upon
which the Notes are, and are to be, authenticated and delivered.

          The Notes are subject to redemption upon not less than 30 nor more
than 60 days notice from time to time on or after January 15, 2004 and prior to
Maturity, at the election of the Company, at Redemption Prices (expressed in
percentages of principal amount thereof), plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the Redemption Date (subject to the right
of Holders of record on the relevant Record Date to receive interest due on an
Interest Payment Date that is on or prior to the Redemption Date), if redeemed
during the 12-month period beginning January 15 of the years indicated:

                                    Redemption
                  2004               105.652%
                  2005               103.750%
                  2006               101.875%
           2007 (and thereafter)     100.000%

          Notwithstanding the foregoing, prior to January 15, 2002, the Company
may on any one or more occasions redeem up to 35% of the originally issued
principal amount of Notes at a redemption price of 111.25% of the principal
amount thereof, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the redemption date, with the Net Cash Proceeds of one or more Public
Equity Offerings; provided (i) that at least 65% of the originally issued
                  --------
principal amount of Notes remains outstanding immediately after giving effect to
such redemption and (ii) that notice of such redemption is mailed within 60 days
of the closing of each such Public Equity Offering.

          Upon the occurrence of a Change of Control, the Holder of this Note
may require the Company, subject to certain limitations provided in the
Indenture, to repurchase all or any
<PAGE>

part of this Note at a purchase price in cash in an amount equal to 101% of the
principal amount thereof plus accrued and unpaid interest and Liquidated
Damages, if any, to the date of purchase.

          Under certain circumstances, in the event the Net Cash Proceeds
received by the Company from an Asset Sale, which proceeds are not used to (i)
(A) apply an amount equal to such Net Cash Proceeds to permanently repay
unsubordinated Indebtedness of the Company or Indebtedness of any Restricted
Subsidiary, in each case owing to a Person other than the Company or any of its
Restricted Subsidiaries or (B) invest an equal amount, or the amount not so
applied pursuant to clause (A), in long-term property or assets of a nature or
type or that are used in a business (or in a company having property and assets
of a nature or type, or engaged in a business) similar or related to the nature
or type of the property and assets of, or the business of, the Company and its
Restricted Subsidiaries existing on the date of such investment (as determined
in good faith by the Board of Directors, whose determination shall be conclusive
and evidenced by a Board Resolution) and (ii) apply (no later than the end of
the 360-day period immediately following the date of receipt of the Net Cash
Proceeds from an Asset Sale) such excess Net Cash Proceeds (to the extent not
applied pursuant to clause (i)) in accordance with the Indenture, and which
proceeds equal or exceed a specified amount and are not applied to purchase 11
3/4% Senior Notes due 2004 of the Company pursuant to a 1997 Senior Notes Offer
(as defined in the Indenture), the Company shall be required to make an offer to
all Holders to purchase the maximum principal amount of Notes, in an integral
multiple of $1,000, that may be purchased out of such amount at a purchase price
in cash equal to 100% of the principal amount thereof, plus accrued, unpaid
interest and Liquidated Damages, if any, to the date of purchase, in accordance
with the Indenture.  Holders of Notes that are subject to any offer to purchase
shall receive an Excess Proceeds Offer from the Company prior to any related
Excess Proceeds Payment Date.

          In the case of any redemption or repurchase of Notes, interest
installments and Liquidated Damages, if any, whose Stated Maturity is on or
prior to the Redemption Date or Excess Proceeds Payment Date will be payable to
the Holders of such Notes, or one or more Predecessor Notes, of record at the
close of business on the relevant Record Date referred to on the face hereof.
Notes (or portions thereof) for whose redemption and payment provision is made
in accordance with the Indenture shall cease to bear interest from and after the
Redemption Date or Excess Proceeds Payment Date, as the case may be.

          In the event of redemption of this Note in part only, a new Note or
Notes for the unredeemed portion hereof shall be issued in the name of the
Holder hereof upon the cancellation hereof.

          If an Event of Default shall occur and be continuing, the principal of
all the Notes may be declared due and payable in the manner and with the effect
provided, in the Indenture.

          The Indenture contains provisions for defeasance at any time of (a)
the entire indebtedness of the Company on this Note and (b) certain restrictive
covenants and the related Defaults and Events of Default, upon compliance by the
Company with certain conditions set forth therein, which provisions apply to
this Note.
<PAGE>

          The Indenture permits, with certain exceptions as therein provided,
the amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders under the Indenture at any time by the
Company and the Trustee with the consent of the Holders of a majority in
aggregate principal amount of the Notes at the time Outstanding. The Indenture
also contains provisions permitting the Holders of specified percentages in
aggregate principal amount of the Notes at the time Outstanding, on behalf of
the Holders of all the Notes, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and
their consequences. Any such consent or waiver by or on behalf of the Holder of
this Note shall be conclusive and binding upon such Holder and upon all future
Holders of this Note and of any Note issued upon the registration of transfer
hereof or in exchange herewith or in lieu hereof whether or not notation of such
consent or waiver is made upon this Note.

          No reference herein to the Indenture and no provision of this Note or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of (and premium, if any) and
interest and Liquidated Damages, if any, on this Note at the times, place, and
rate, and in the coin or currency, herein prescribed.

          If less than all the Notes are to be redeemed, the particular Notes to
be redeemed shall be selected not more than 60 days prior to the Redemption Date
in compliance with the requirements of the principal national securities
exchange, if any, on which the Notes are listed or, if the Notes are not listed
on a national securities exchange, on a pro rata basis, by lot or by such other
method as the Trustee in its sole discretion shall deem fair and appropriate and
which may provide for the selection for redemption of portions of the principal
of Notes.

          As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of this Note is registrable on the Note Register
of the Company, upon surrender of this Note for registration of transfer at the
office or agency of the Company maintained for such purpose in The City of New
York, duly endorsed by, or accompanied by a written instrument of transfer in
form satisfactory to the Company and the Note Registrar duly executed by, the
Holder hereof or his attorney duly authorized in writing, and thereupon one or
more new Notes, of authorized denominations and for the same aggregate principal
amount, will be issued to the designated transferee or transferees.

          The Notes are issuable only in registered form without coupons in
denominations of $1,000 and any integral multiple thereof. As provided in the
Indenture and subject to certain limitations therein set forth, the Notes are
exchangeable for a like aggregate principal amount of Notes of a different
authorized denomination, as requested by the Holder surrendering the same.

          No service charge shall be made for any registration of transfer or
exchange of Notes, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.
<PAGE>

          Prior to the time of due presentment of this Note for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Note is registered on the Note Register
as the owner hereof for all purposes, whether or not this Note be overdue, and
neither the Company, the Trustee nor any agent shall be affected by notice to
the contrary.

          THIS NOTE SHALL BE GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE LAWS
OF THE STATE OF NEW YORK.

          Interest on this Note shall be computed on the basis of a 360-day year
of twelve 30-day months.

          All terms used in this Note which are defined in the Indenture shall
have the meanings assigned to them in the Indenture.
<PAGE>

                           [FORM OF TRANSFER NOTICE]

          FOR VALUE RECEIVED the undersigned registered holder, hereby sell(s),
assign(s) and transfer(s) unto

Insert Taxpayer Identification No.


________________________________________________________________________________
(Please print or typewrite name and address including zip code of assignee)


________________________________________________________________________________
the within Note and all rights thereunder, hereby irrevocably constituting and
appointing

_________________________________ its attorney to transfer such Note on the
books of the Company with full power of substitution in the premises.


          In connection with any transfer of this Note occurring prior to the
date which is the earlier of (i) the date of an Effective Registration Statement
or (ii) two years after the later of the original issuance of this Note or the
last date on which this Note was held by an Affiliate of the Company, the
undersigned confirms that without utilizing any general solicitation or general
advertising:

                                  [Check One]

[_]  (a) this Note is being transferred in compliance with the exemption from
     registration under the Securities Act of 1933, as amended, provided by Rule
     144A thereunder,

                                       or
                                       --

[_]  (b) this Note is being transferred other than in accordance with (a) above
     and documents are being furnished which comply with the conditions of
     transfer set forth in this Note and the Indenture.
<PAGE>

If neither of the foregoing boxes is checked, the Trustee or other Registrar
shall not be obligated to register this Note in the name of any Person other dm
the Holder hereof unless and until the conditions to any such transfer of
registration set forth herein and in Section 305 of the Indenture shall have
been satisfied.


Date: ______________
                              __________________________________________________

                              NOTICE: The signature to this assignment must
                              correspond with the name as written upon the face
                              of the within-mentioned instrument in every
                              particular, without alteration or any change
                              whatsoever.


Signature Guarantee/1/: _________________________________________________

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

          The undersigned represents and warrants that it is purchasing this
Note for its own account or an account with respect to which it exercises sole
investment discretion and that it or such account is a "qualified institutional
buyer" within the meaning of Rule 144A under the Securities Act of 1933, as
amended, and that each is aware that the sale to it is being made in reliance on
Rule 144A and acknowledges that it has received such information regarding the
Company as the undersigned has requested pursuant to Rule 144A or has determined
not to request such information and that each is aware that the transferor is
relying upon the undersigned's foregoing representations in order to claim the
exemption from registration provided by Rule 144A.

Date:_______________
                              __________________________________________________
                              NOTICE: To be executed by an executive officer





___________________________

  /1/Guarantor must be a member of the Securities Transfer Agents Medallion
Program ("STAMP"), the New York Stock Exchange Medallion Signature Program
("MSP") or the Stock Exchange Medallion Program ("SEMP").
<PAGE>

                      OPTION OF HOLDER TO ELECT PURCHASE


          If you wish to have this Note purchased by the Company pursuant to
Section 1010 or 1017 of the Indenture, check the Box: [_]

          If you wish to have a portion of this Note purchased by the Company
pursuant to Section 1010 or 1017 of the Indenture, state the amount (in original
principal amount) below:


                                  $__________.


Date:__________

Your Signature:_________________________________________________
               (Sign exactly as your name appears on the other side of this
                Note)


Signature Guarantee/2/:_________________________________________









_______________________________

  /2/Guarantor must be a member of the Securities Transfer Agents Medallion
Program ("STAMP"), the New York Stock Exchange Medallion Signature Program
("MSP") or the Stock Exchange Medallion Program ("SEMP").


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