Document:

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                            MASTER PURCHASE AGREEMENT

                                     BETWEEN

                  LOGIX COMMUNICATIONS CORPORATION OF OKLAHOMA

                                       AND

                              NORTHERN TELECOM INC

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                                TABLE OF CONTENTS
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ARTICLES
<S>        <C>
Article 1 - Definitions

Article 2 - Scope of Agreement

Article 3 - Placement of Orders

Article 4 - Price and Payment

Article 5 - Shipment, Title and Risk of Loss

Article 6 - Testing, Turnover and Acceptance

Article 7 - Order Cancellation

Article 8 - Warranty

Article 9 - Nortel's Additional Obligations

Article 10 - Software License

Article 11 - Liability for Bodily Injury, Property Damage and Patent Infringement

Article 12 - Remedies and Limitation of Liability

Article 13 - Continuing Availability

Article 14 - Term and Termination

Article 15 - Confidentiality

Article 16 - Miscellaneous

EXHIBITS:

Exhibit A - Product Annexes
</TABLE>

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                            MASTER PURCHASE AGREEMENT

This Master Purchase Agreement ("Agreement"), effective as of the 30th day of
June, 1998, is entered into by and between Logix Communications Corporation of
Oklahoma (hereinafter "Company ") with executive offices located at 13439 North
Broadway Extension, Suite 200, Oklahoma City, Oklahoma 7314 and Northern Telecom
Inc. (hereinafter "Nortel"), with offices located at 4001 East Chapel
Hill-Nelson Highway, Research Triangle Park, North Carolina 27709.

WHEREAS, Company is engaged in providing communication services and products,
and providing and maintaining public and private telecommunication networks; and

WHEREAS, Nortel, in conjunction with Nortel Affiliates, is engaged in the
design, development, manufacture and sale of various products and offers
services associated with such products, which can be used in connection with the
telecommunication services, products and networks of Company, and

WHEREAS, Company wish(es) to be able to purchase and/or license various products
and services for delivery and installation in the United States from Nortel,
which Company will use for its own internal use and not for resale or as stock
in trade and Nortel is willing to sell and/or license such products to Company,
subject to the terms and conditions of this Agreement; and

NOW, THEREFORE, in consideration of the premises and mutual covenants and
agreements herein set forth, the parties agree as follows:

ARTICLE 1. DEFINITIONS

The following words shall have the meanings set forth below. Words in the
singular shall be held to include the plural and vice versa and words of gender
shall be held to include the other gender as the context requires.

         1.1 "Acceptance" shall mean that Company has indicated that an ordered
Product is (i) operating in accordance with the applicable Specification; (ii)
operating in accordance with other documentation or criteria which the parties
have mutually agreed to in writing; or (iii) deemed to be accepted pursuant to
criteria set forth in Article 6.

         1.2 "Applications" shall mean any program, product, service,
development or invention developed by a party using the Building Blocks,
including any modified or created Building Blocks, created by Company.

         1.3 "Building Block(s)" shall mean those Software files provided by
Nortel with Modifiable Software that are manipulatable or which may be
created by Company with such Modifiable Software and which can be used,
created or manipulated by Company to create Applications.

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         1.4 "Confidential Information" shall mean all information, including
without limitation, specifications, drawings, documentation, know-how and
pricing information, of every kind or description which may be disclosed by one
party to the other party in connection with this Agreement, provided the
disclosing party shall clearly mark all such information disclosed in writing as
the confidential property of the disclosing party and, in the case of oral
disclosure, the disclosing party shall identify the confidential nature of any
such information at the time of such oral disclosure and shall provide a written
summary of the orally disclosed information to the recipient within fifteen (15)
days of such disclosure.

         1.5 "Customer" shall mean entities to whom Company provides
telecommunications services as a result of Company's internal use of the
Products.

         1.6 "Customer Information" or "CI" shall mean the information provided
by Company to Nortel in order for Nortel to engineer and/or provide the
components of Systems.

         1.7 "Documentation" shall mean the documents which Nortel generally
makes available to its customers containing descriptive, operating,
installation, engineering and maintenance information for Products, including
Specifications, as such documents may be amended from time to time.

         1.8 "Effective Date" shall mean the date this Agreement becomes
effective which shall be the date identified above.

         1.9 "Extension" shall mean Hardware and/or Software which is engineered
by Nortel and installed and which is added to an Initial System after the
Turnover Date of the Initial System.

         1.10 "Hardware" shall mean, individually and collectively, the Nortel
equipment listed in Section 1 of Exhibit A, and shall be deemed to include any
hardware which Nortel adds to its generally available Hardware price lists or so
identifies to Company in a Quotation.

         1.11 "Hazardous Material" shall mean any pollutants or dangerous, toxic
or hazardous substances (including without limitation, asbestos) as defined in,
or pursuant to the OSHA Hazard Communication Standard (29 CFR Part 1910, Subpart
Z), the Resource Conservation and Recovery Act (15 USC Section 6901, et seq.),
the Toxic Substances Control Act (15 USC Section 2601, et seq.), the
Comprehensive Environmental Response Compensation and Liability Act (42 USC
Section 9601, et seq.), and any other federal, state or local environmental law,
ordinance, rule or regulation or equivalent law or regulation in the location to
which the Product is shipped by Nortel.

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         1.12 "Initial System" shall mean Hardware and Software, inclusive of a
central processor unit, included in a configuration which Nortel identifies as a
System and which is initially engineered by Nortel and installed at a specific
site.

         1.13 "Installation Site" shall mean the location or facility identified
in an Order at which the applicable Products will be installed.

         1.14 "Licensed Software" shall mean the Software which Company has
licensed pursuant to this Agreement.

         1.15 "Merchandise" shall mean any Hardware or other parts or components
which are not ordered as part of a System and with respect to which no
engineering, installation or other Services are provided by Nortel.

         1.16 "Modifiable Software" shall mean Software, or a portion of
Software that is identified as such by Nortel in its applicable Documentation,
which Company may have certain rights to modify and potentially create
Applications or Building Blocks in accordance with the applicable Documentation.

         1.17 "Non-licensed Software" shall mean Software for which Company has
not yet obtained a license nor paid applicable right-to-use fees, but which
Software may be included with Software loads delivered to Company hereunder.

         1.18 "Nortel Affiliate" shall mean Nortel's parent corporation,
Northern Telecom Limited and any corporation controlled directly or indirectly
by Northern Telecom Limited through the ownership or control of shares or other
securities in such corporation.

         1.19 "Order" shall mean a numerically controlled purchase authorization
document issued by Company to Nortel specifying the types and quantities of
Products and Services to be furnished by Nortel.

         1.20 "Product(s)" shall mean, individually and collectively, the
Hardware, Software, and Documentation, in addition, any product that is placed
on Nortel's standard price list in the future shall be deemed incorporated into
Exhibit A upon agreement of the parties to additional terms and conditions
specified in the applicable Product Annex, if any.

         1.21 "Product Annex" shall mean, with respect to a specific Product,
additional or modified terms and conditions as set forth in Exhibit A, inclusive
of but not limited to those that may apply to any Third Party Hardware or Third
Party Software, unique to such Product.

         1.22 "Quotation" shall mean a written budgetary or firm price quotation
issued by Nortel to Company for the supply of any Products or Services pursuant
to this Agreement.

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         1.23 "Service(s)" shall mean, individually and collectively, any of the
services set forth in this Agreement that Company may acquire from Nortel, such
as but not limited to maintenance, engineering, installation, training, data
management, program management, project management, commissioning, testing,
technical assistance Service with respect to Products and installation, and
consulting.

         1.24 "Services Software" shall mean that Software and related
documentation made available by Nortel which may be used by Company for
estimation, planning or information purposes.

         1.25 "Ship Date" shall mean the date as agreed to by the parties, on
which a Product ordered by Company is scheduled to be shipped from Nortel's
facility or in the case of Software which is downloaded, the date upon which
such Software is to be downloaded to the System; however, Ship Date shall not
mean the date on which Non-Licensed Software is activated.

         1.26 "Software" shall mean (i) computer programs in object code form or
firmware which (a) are owned by, or licensed to, Nortel or any Nortel Affiliates
or suppliers, (b) reside in Product memories, tapes, disks or other media, and
(c) provide basic logic operating instructions and user-related application
instructions, and (ii) documentation associated with such computer programs
which may be furnished by Nortel to Company from time to time, including both
Licensed Software and Non-Licensed Software, but in no event shall Software
include source code.

         1.27 "Software Release" shall mean Software or revisions to Software
containing problem fixes, new features and/or enhancements.

         1.28 "Specification" shall mean with respect to any Product the
specifications and/or practices set forth in Northern Telecom Practices ("NTPs")
or similar documents published by Nortel which Nortel identifies as the standard
performance specifications and practices for such Product.

         1.29 "System" shall mean a configuration of Hardware and Software
providing a specified functionality and includes an Initial System and its
Extensions, if any.

         1.30 "Third Party Hardware" shall mean any hardware not of Nortel's
manufacture which shall be deemed to include any such hardware which Nortel adds
to its generally available Third Party Hardware price lists or so identifies to
Company in a Quotation.

         1.31 "Third Party Software" shall mean any Software not owned by Nortel
which is included within Licensed Software or Non-Licensed Software.

         1.32 "Turnover" shall mean, with respect to any System installed by
Nortel, that Nortel has completed its standard manufacturing, verification
cycle, installation

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and/or agreed-upon test procedures, as applicable and that the System is ready
for acceptance testing by Company.

         1.33 "Turnover Date" shall mean, with respect to any Product installed
by Nortel hereunder, the date on which Nortel provides a notice of Turnover to
Company.

ARTICLE 2. SCOPE OF AGREEMENT

         2.1 This Agreement sets forth the terms and conditions under which
Company may order Products and/or Services from Nortel. Company may use the
Products itself or use the Products to provide services to others, subject to
the terms and conditions of this Agreement. All Products shall be delivered and
installed in the United States.

         2.2 To the extent any terms and conditions set forth in this Agreement
are inapplicable to a Product, the applicable terms and conditions and any
additional terms and conditions for such Product shall be set forth in a Product
Annex.

         2.3 If specified in a Product Annex as a requirement, Company shall,
fifteen (15) days prior to each calendar quarter, submit to Nortel a
consolidated non-binding forecast of Products by geographic region, that Company
anticipates purchasing or licensing over the next four (4) calendar quarters. In
addition to the type, quantity and cumulative dollar amount of Products, the
parties may agree upon additional information to be included in such forecast.

         2.4 Unless specifically stated otherwise, all references to money or
currency shall be in U.S. dollars and all documentation, correspondence and
communication shall be in the English language.

ARTICLE 3. PLACEMENT OF ORDERS

         3.1 when Company desires to order Products and/or Services, Company
shall submit to such person as Nortel shall designate, an Order which shall at a
minimum specify the following, if applicable:

                    (i)       the types and quantities of Products and
                    Services to be furnished by Nortel;

                    (ii) the applicable prices, charges and fees with respect to
                    such Products and Services;

                    (iii)     the location or facility to which the Products
                    are to be delivered;

                    (iv)      the incorporation by reference of this
                    Agreement;

                    (v)       the location at which the Product is to be
                    installed, if known;

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                    (vi)      the requested Ship Date and Turnover Date of the
                    System; and

                    (vii) any other information required under this Agreement to
                    be included in an Order.

         3.2 All purchases pursuant to this Agreement shall be made by means of
Orders issued from time to time by Company and accepted by Nortel in writing
within fifteen (15) days after receipt of Order. In the event Nortel fails to
provide its acceptance of an Order in writing within such fifteen (15) day
period, such Order shall be deemed to be accepted provided that no additional or
special terms and conditions have been written on the face of such Order. Nortel
shall have the right to reject any Order, or the applicable portion of such
Order, placed hereunder where Company has another agreement with Nortel for the
provision of the Products or Services requested in such Order.

         3.3 All Orders issued by Company pursuant to this Agreement shall refer
to and specifically incorporate this Agreement by reference and the terms and
conditions herein shall govern the transaction resulting from such Order
provided that such Order is accepted by Nortel. Preprinted terms and conditions
set forth in Orders issued by Company, or in any prior Quotations,
acknowledgments or other related documentation issued by any party, shall be
considered void and shall have no force or effect; provided, however, that any
special terms and conditions written on the face of an Order or otherwise
incorporated into such Order shall, upon acceptance in writing by Nortel, and
for such Order only, supersede the specific terms and conditions contained
herein which may be in conflict.

         3.4 Company may at any time request additions, alterations, deductions
or deviations to an Order subject to the condition that such changes and any
adjustments resulting from such changes including, but not limited to, schedules
and prices, shall be mutually agreed upon and, if so agreed, subsequently
detailed in a written revision to the applicable Order ("Change Order"). Company
acknowledges that a premium charge may be applied by Nortel should Nortel agree
to process a Change Order outside of its standard Order processing cycle for a
Product or in the event that a Change Order requires an additional amount of
work (such as engineering) to be undertaken to comply with such changes.

         3.5 If Company desires to receive a budgetary or firm Quotation from
Nortel for a Product or Service, Company shall submit such request in writing
to Nortel's Director, Commercial Marketing, or such other person as
designated by Nortel. The request for information shall include the
information listed in Section 3.1, as applicable.

         3.6 Nortel shall respond in writing to requests for budgetary
Quotations and request for firm Quotations. Unless otherwise specified in the
firm Quotation, such firm Quotation shall be valid for ninety (90) days from the
date of such Quotation. Budgetary Quotations shall be provided for information
and planning purposes only and shall not be

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considered to be a final or firm statement of the Quotation. The Quotations
shall include the following information:

         (i)        Budgetary Quotations

                    (a)       preliminary Hardware and Software lists;
                    (b)       the estimated charges for the Products;
                    (c)       the estimated charges for Services requested; and
                    (d)       any other information required by Company's
                              request.

         (ii)       Firm Quotations

                    (a)       the price to be paid by Company for the
                              Products, after applying the applicable
                              discounts, if any;
                    (b)       fixed charges for Services requested;
                    (c)       complete Hardware and Software lists and project
                              schedules; and
                    (d)       any other information required by Company's
                              request.

         3.7 The Ship Date shall be based on Nortel's standard intervals for the
applicable Product; however, the parties shall always mutually agree on the Ship
Date and take into consideration any unique aspect of the applicable project.

         3.8 Orders may be issued either electronically, such as through
electronic data interchange, or via traditional manual methods, as mutually
agreed to by the parties.

ARTICLE 4. PRICE AND PAYMENT

         4.1 Nortel shall charge Company for each Product and/or Service ordered
by Company in accordance with the prices set forth in each accepted Order, which
prices shall be based upon prices identified in one of (i) a Product Annex, (ii)
a Firm Quotation, (iii) Nortel's then current prices or (iv) as specified
elsewhere in this Agreement or as otherwise mutually agreed in writing.

         4.2 Nortel's prices, if set forth in Exhibit A, may be revised by
Nortel no more than once each calendar year, by providing sixty (60) days
prior written notice to Company. Such notice shall specify the effective date
of the price change and shall apply to all Orders received by Nortel on or
after the effective date of the price change. However, in the event there is
a recognized industry-wide shortage of a component that is incorporated in a
Product, Nortel may increase the price of such Product, following the
provision of written notice to Company fifteen (15) days prior to the
effective date of such increase or such shorter date as is mutually agreed in
view of the shortage. The price increase of such Product shall be limited to
the increase in cost of such component for that Product, plus an appropriate
markup, for the period of time during which such recognized shortage exists.
Following the implementation of a price increase due to a component shortage,
the parties shall jointly review every three (3) months or at such other time
as is mutually agreed, in good faith, whether such component shortage still
exists. If the component shortage has abated, the parties shall jointly
determine whether there still is a need for such price increase.

<PAGE>

         4.3 Nortel shall promptly extend to Company any price reductions made
by Nortel in its generally available, then current list prices for Products
and/or Services. Such price reduction shall apply to all Orders received on or
after the effective date of such price reduction.

         4.4 Nortel shall invoice Company for Products and Services ordered as
follows, unless otherwise agreed to in writing:

                    (i) for Systems, whether or not installation has been
                    ordered from Nortel, one hundred percent (100%) of the price
                    of the Products on the Ship Date, one hundred percent (100%)
                    of the price of any Services upon the date of completion of
                    such Services, except with respect to installation Services,
                    if any, which shall be billed one hundred percent (100%)
                    upon Turnover. Except for installation Services, for
                    Services that have a duration of more than one (1) month to
                    complete, Nortel may invoice Company monthly for that
                    portion of such Services which have been performed as of
                    such invoicing date.

                    (ii) for Merchandise or Documentation provided on a
                    furnish-only basis, one hundred percent (100%) of the total
                    price on the Ship Date; and

                    (iii) for Orders covering Services only, one hundred percent
                    (100%) of the price for such Service following completion of
                    performance, except for recurring support Services which
                    shall be billed quarterly in advance unless otherwise
                    agreed. Some Services may be subject to monthly rates as set
                    out iii a Product Annex or separate Service agreement. To
                    the extent that the provisions indicated above differ, such
                    differences shall be documented in the applicable Product
                    Annex or separate Service agreement and such provisions
                    shall take precedence.

         4.5 Each invoice shall be paid in full within thirty (30) days after
the date of such invoice. In the event that Company does not pay an invoice in
full within such thirty (30) day period, then Nortel may charge Company interest
on the portion of such outstanding invoice, from day thirty one (31) forward, at
the rate of one and one half percent (1.5%) simple compound interest per month,
or such lesser amount as may be the maximum permissible rate under applicable
law, until such time as the outstanding invoice is paid. In addition, Company
agrees to pay all collection costs and reasonable legal fees incurred by Nortel
as a result of late payment or non-payment by Company.

ARTICLE 5. SHIPMENT, TITLE AND RISK OF LOSS

         5.1 Risk of loss and damage to Products shall pass to Company upon
delivery to the loading dock at the Installation Site or other delivery location
specified by Company in an Order. Company shall keep such Products fully insured
for the total amount then due Nortel for such Products. Company shall pay
transportation charges,

<PAGE>

including insurance, associated with the shipment of Products, however if the
parties agree, Nortel shall prepay transportation charges, and insurance for
delivery of Products to the Installation Site, or other designated receiving
point as specified in an Order. The charges therefore shall be invoiced by
Nortel and paid by Company to Nortel in accordance with Article 4 above.

         5.2 Good title to Hardware furnished hereunder, free and clear of all
liens and encumbrances, shall vest in Company upon full payment to Nortel of the
total amount payable by Company for such Hardware and any related Licensed
Software or Services ("Total Fee") furnished by Nortel in connection with such
Hardware. Prior to payment for such Product, Company shall not sell or lease the
Hardware, or allow any liens or encumbrances to attach to the Hardware or
Licensed Software, or remove the Hardware or Licensed Software from the
Installation Site without the prior written consent of Nortel, such consent not
to be unreasonably withheld.

         5.3 If Company notifies Nortel prior to a Shipment Date that Company
does not wish to receive such Products on the Shipment Date, or the Installation
Site or other delivery location is not prepared in sufficient time for Nortel to
make delivery in accordance with such date, or Company fails to take delivery of
any portion of such Products, Nortel may place the applicable Products in
storage. In that event, Company shall be liable for all additional costs thereby
incurred by Nortel. Delivery by Nortel of any Products to a storage location as
provided above shall be deemed to constitute delivery of the Products to Company
for purposes of this Agreement, including, without limitation, provisions for
payment, invoicing, passage of risk of loss, and commencement of the warranty
period.

         5.4 Company grants to Nortel and/or its agents a purchase money
security interest in the Hardware and its proceeds or such other similar
protection as may be available in the applicable jurisdiction. Until the Total
Fee has been paid to Nortel, Company shall cooperate with Nortel in preserving
and perfecting Nortel's purchase money security interest in the Products and
Company shall promptly (a) execute and deliver to Nortel such financing
statements as Nortel may require and (b) execute and deliver to Nortel such
other agreements, documents and instruments as Nortel may require to perfect and
maintain the validity, effectiveness and priority of the security interest
created or intended to be created by this Agreement. Company authorizes Nortel
to file one or more financing or continuation statements and amendments thereto,
relating to all or any part of the Products without signature of the Company
where permitted by law. A carbon, photographic or other reproduction of this
Agreement or of any financing statement covering the Products or any part
thereof shall be sufficient as a financing statement and may be filed as a
financing statement. Company shall not sell, lease or otherwise transfer the
Products or any portion thereof or allow any liens or encumbrances to attach to
such Products or any portion thereof prior to payment in full of the Total Fee.

<PAGE>

ARTICLE 6. TESTING, TURNOVER AND ACCEPTANCE

         6.1 If Nortel has installed a Product, upon completion of such
installation Nortel shall test the Product in accordance with Nortel's Turnover
procedures to verify that such Product functions substantially in accordance
with the applicable Specifications. Upon completion of such verification, Nortel
shall provide to Company a written notice of Turnover. Company shall be
permitted an opportunity to have an appropriately qualified individual in
attendance to observe the performance of such tests, however, the absence of
such Company individual for any reason shall not invalidate the tests nor be a
reason for Company to withhold Acceptance.

         6.2 Within ten (10) business days after the Turnover Date, Company
shall either accept the Product in writing, or notify Nortel in writing,
specifying in reasonable detail Those particulars in which, in Company's
opinion, the Product is not in material conformance with the Specifications. If
Acceptance does not occur within such ten (10) days after the Turnover Date and
Company has not indicated to Nortel in writing its basis for not accepting such
Product, then Acceptance shall be deemed to have occurred.

         6.3 If Nortel does not install Products furnished hereunder, Nortel
shall, prior to delivery of the Products, perform such factory tests as Nortel
determines to be appropriate in order to confirm that such Products perform
substantially in accordance with the applicable Specifications. Company shall be
deemed to have accepted the Products based upon such tests and Acceptance shall
be deemed to have occurred upon the Ship Date. In the event Company or any other
entity intends to perform installation of a Product, (except for installation of
a Product which is not permitted to be installed other than by Nortel, as
specified in the applicable Product Annex) Company or such entity may be
required to complete prerequisite training or certification prior to Company
being allowed to install such Product.

         6.4 In the event Company is utilizing any Product in a
revenue-generating capacity, Acceptance shall be deemed to have occurred without
limitation or restriction, upon the date of placement of such Product into
revenue.generating service.

         6.5 Products, such as Merchandise, which are purchased separately from
a System, shall be deemed accepted upon the Ship Date. Services which are
purchased separately from a Product shall be deemed to be accepted upon
completion of such Services or upon specific milestones as may be identified in
a Product Annex.

         6.6 Company shall not unreasonably withhold Acceptance. Nortel shall
correct any deficiencies identified by Company in the manner described in this
Article in the Products whereby such Products do not meet the performance
criteria set forth in the Specifications. when Nortel has corrected such
deficiencies, Company shall accept the Product in writing. Company's failure to
either accept or provide notice of non-conformance within the time frame from
the Turnover Date, as prescribed in Section 6.2, shall constitute Acceptance of
the Product.

<PAGE>

         6.7 Following Acceptance of a Product, Company shall execute Nortel's
Acceptance notice, confirming Acceptance without any conditions, restrictions,
or limitations of any nature whatsoever.

         6.8 Acceptance shall not be withheld or postponed due to:

                    (i) Deficiencies of such Products resulting from causes not
                    attributable to Nortel, such as, but not limited to (a)
                    material change or inaccuracy of Customer Information, (b)
                    inadequacy or deficiencies of any materials, information,
                    facilities or services provided directly or indirectly by
                    Company and tested in conjunction with the applicable
                    Products, or spurious outputs from adjacent material, or (c)
                    other conditions external to the Products which are beyond
                    the limits specified by Nortel in the Specifications for the
                    Products; or

                    (ii) Minor deficiencies or shortages with respect to such
                    Products which are attributable to Nortel, but of a nature
                    that do not prevent operation of the Products in
                    revenue-generating service.

         6.9 With respect to any deficiencies of the type described in Section
6.8(i), Nortel shall at Company's request and expense assist Company in the
elimination or minimization of any such deficiencies. With respect to any
deficiencies or shortages as described in Section 6.8(ii), Nortel shall, at
Nortel's expense, correct any such deficiencies or shortages within thirty (30)
days of the date of Acceptance or as otherwise agreed by the parties.

         6.10 In the event Company notifies Nortel of non-acceptance of a
Product and Nortel personnel travels to the Installation Site to remedy such
non.acceptance and determines that non-acceptance is due to a deficiency of the
type described in Section 6.8(i), Nortel will invoice Company for investigation
of the matter. In addition to the standard labor rate for Nortel's personnel who
travel to the Installation Site, Nortel will invoice Company for the reasonable
travel and living expenses incurred by such personnel.

<PAGE>

ARTICLE 7. ORDER CANCELLATION

         7.1 In the event Company cancels all or any part of an Order, Company
shall pay to Nortel a cancellation charge for each Product or each item of Third
Party Hardware or Third Party Software that has been canceled in accordance with
the schedule set forth in the applicable Product Annex.

         7.2 Orders for Products That have been shipped by Nortel or Nortel's
supplier may not be canceled. Furthermore, Orders for Products which Nortel
customizes in accordance with a specific Company request or which are private
labeled products, may not be canceled.

ARTICLE 8. WARRANTY

         8.1 Nortel warrants that for a period of twenty-four (24) months from
the Ship Date of a System the Hardware contained in such System under normal use
and service will be free from defective material and faulty workmanship and
shall comply with the applicable Specification. The warranty period for
Merchandise shall be ninety (90) days from the Ship Date of such Merchandise.
The foregoing warranties shall not apply to items normally consumed during
operation of a System such as, but not limited to, lamps and fuses.

         8.2 Nortel warrants that any installation Service performed by Nortel
with respect to a System will be free from defects in workmanship for a period
of twelve (12) months from the completion date of such Service.

         8.3 Nortel warrants that any Licensed Software shall function during
the warranty period of the Hardware with respect to which such Licensed Software
is furnished without any material, service-affecting, non-conformance to the
applicable Specifications. Licensed Software that is delivered separately from
Hardware is warranted for a period of twelve (12) months from the applicable
Ship Date. If the Licensed Software fails to so function, Company's exclusive
remedy and Nortel's sole obligation under this warranty is for Nortel to correct
such failure through, at Nortel's option, the replacement or modification of the
Software or such other actions as Nortel reasonably determines to be
appropriate, all within a reasonable time having regard to all of the
circumstances and failing which the parties agree to negotiate a commercially
reasonable solution. Any modification to the Software not performed by Nortel,
other than with respect to Modifiable Software, shall void this warranty.

         8.4 If Hardware is not free from defects in material or workmanship and
fails to comply with the applicable Specification during the warranty period,
Nortel will repair, replace or modifY the defective Hardware so that it
substantially complies with the applicable Specification. The warranty service
shall be performed at the Installation Site or Nortel's facility as determined
by Nortel. If Nortel is unable to repair or modify the defective Hardware within
a reasonable period of time so that such Hardware conforms to the applicable
Specification, Nortel shall replace the defective Hardware

<PAGE>

with hardware that conforms to such Specification. Nortel's sole obligation and
Company's exclusive remedy under the warranty provisions of this Article with
respect to Hardware and installation Services shall be limited to repair,
modification or replacement of the defective Hardware or correction of the
defective installation Services.

         8.5 Replacement Hardware may be new or reconditioned at Nortel's
option. Notwithstanding the foregoing, the warranty period of Hardware which has
been subject to repair or replacement by Nortel shall commence upon the Ship
Date of the repaired or replacement Hardware to Company and shall expire on the
later of ninety (90) days or the last day of the original warranty period with
respect to the Hardware which was repaired or replaced. The warranty period of
Licensed Software which has been corrected, due to a material non-conformance
found in such Licensed Software, shall expire on the later of ninety (90) days
from the Ship Date of the corrected Licensed Software to Company or the last day
of the original warranty period with respect to such Licensed Software.

         8.6 Nortel warrants that its Products shall comply in all material
aspects with all applicable laws and regulations in force known to Nortel, which
are in force on the date of the applicable Order therefor, which laws or
regulations directly impose obligations upon any manufacturer, seller or
installer of such Products.

         8.7 The performance by Nortel of any of its obligations described in
this Article 8 shall not extend the applicable warranty period.

         8.8 The warranties set forth in this Article shall not apply to any
Products where the defect or non-conformance is due to (i) accident, fire,
explosion, power failure, power surge or other power irregularity, lightning,
alteration, abuse, misuse or repair not performed by Nortel; (ii) improper
storage; (iii) failure to comply with all applicable environmental requirements
for the Product as specified by Nortel or any other applicable supplier, such as
but not limited to temperature or humidity ranges; (iv) improper performance of
installation, maintenance, operation or other service in connection with the
Product, provided such service was not performed by Nortel or on Nortel's
behalf; (v) use in conjunction with an incompatible product or a product not
purchased under this Agreement; (vi) any error, act or omission by anyone other
than Nortel; or (vii) where written notice of the defect has not been given to
Nortel within the applicable warranty period. The warranties set forth in this
Article shall not apply to Third Party Software or Third Party Hardware,
provided however that Nortel shall assign to Company (to the extent of Nortel's
right to do so) the warranty rights granted to Nortel by the appropriate vendor.

         8.9 Unless Nortel elects to repair or replace defective Hardware at
Company's facility, all Hardware to be repaired or replaced, whether in or out
of warranty, shall be packed by Company in accordance with Nortel's
instructions. Nortel shall use reasonable efforts to ship repaired or
replacement Hardware within thirty (30) days of receipt of the defective
Hardware. To facilitate the processing of the defective Hardware returned

<PAGE>

hereunder, Nortel may ship replacement Hardware prior to Nortel receiving the
defective Hardware. In the event Company fails to return defective Hardware and
Nortel has shipped such replacement Hardware, Nortel shall invoice Company, at
Nortel's applicable, then-current pricing for such replacement Hardware thirty
(30) days after the Ship Date of such replacement Hardware. If mutually agreed,
Nortel will make repairs on-site at charges set forth in the then-current
agreement between the parties for on-site repairs, or if no such agreement
exists, at Nortel's then-current charge for such repairs.

         8.10 If the Hardware returned to Nortel pursuant to the immediately
preceding paragraph is determined by Nortel to be beyond repair and is outside
the warranty period, Nortel shall notify Company and if requested Nortel shall
sell Company replacement Hardware at the then-current contract price between the
parties for such Hardware. If no such contract exists, Nortel shall sell such
replacement Hardware at Nortel's then-current price for such Hardware.

         8.11 Company shall bear risk of loss and shall pay for all
transportation charges for Hardware returned to Nortel and Nortel shall bear
such risk and pay for transportation charges for repaired or replacement
Hardware shipped to Company.

         8.12 Nortel and Nortel's suppliers, as appropriate, shall not have any
responsibility to Customers for warranties offered by Company to such customers
and Company hereby indemnifies and holds harmless Nortel and Nortel's suppliers,
as appropriate, from any claims, damages or liabilities arising out of' or
relating to, any warranties offered by Company to such customers.

         8.13 THE WARRANTIES, CONDITIONS AND REMEDIES SET FORTH HEREIN
CONSTITUTE THE ONLY WARRANTIES, OBLIGATIONS OR CONDITIONS OF NORTEL WITH RESPECT
TO THE PRODUCTS AND SERVICES AND ARE COMPANY'S SOLE AND EXCLUSIVE REMEDIES IN
THE EVENT SUCH WARRANTIES OR CONDITIONS ARE BREACHED. THEY ARE IN LIEU OF ALL
OTHER WARRANTIES OR CONDITIONS, WRITTEN OR ORAL, STATUTORY, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. NORTEL SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL,
SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES OR LOST REVENUES OR PROFITS OR OTHER
ECONOMIC LOSS OF ANY NATURE WHATSOEVER ARISING OUT OF NORTEL'S BREACH OF
WARRANTY OR CONDITION.

ARTICLE 9. NORTEL'S ADDITIONAL OBLIGATIONS

         9.1 Nortel shall make training available to representatives of Company
with respect to the operation, configuration, installation, service, maintenance
and support of the Products at Nortel's Then current prices and at Nortel's
facilities, subject to course and class availability.

<PAGE>

         9.2 Upon request, Nortel shall provide Company with copies of its then
current training catalogue. Company shall provide Nortel with a reasonable
number of names and addresses of people to whom this catalogue should be sent
Upon the request of Company, Nortel shall provide to Company such additional
training as Company requests, at a time and place mutually agreed upon and at
the prices to be quoted for such training. The cancellation fees set forth in
the training catalogues shall apply.

         9.3 Nortel shall include its standard Documentation package, if any,
with each shipment of a Product. Nortel shall make the Documentation available
on its choice of media, which may include CD-ROM or other electronic media.
Nortel shall provide Company with any other Documentation that is ordered at its
then-current pricing therefor. Documentation provided via Nortel's CD-ROM media
may be printed and copied and Documentation provided in paper format may be
copied, to the extent such Documentation so provides, and only to the extent
such printing or copying is necessary for the operation and maintenance of the
Products to which the Documentation pertains. However, Company may not press any
copies of CD-ROM discs.

         9.4 During the term of this Agreement Company may acquire at Nortel's
then-current rates therefor various support Services from Nortel in connection
with the Products Company acquires from Nortel. These Services include, but are
not limited to the following: technical assistance Services, installation
Services, hardware maintenance Services, software maintenance Services and parts
repair and replacement Services.

ARTICLE 10. SOFTWARE LICENSE

         10.1 Company acknowledges that the Software may contain programs which
have been supplied by, and are proprietary to, Third Party Software vendors. In
addition to the terms and conditions herein, Company shall abide by any
additional terms and conditions specified in a Product Annex with respect to any
Software provided by any Third Party Software vendor.

         10.2 Upon Company's payment to Nortel of the applicable fees with
respect to any Software furnished to Company pursuant to this Agreement, Company
shall be granted a personal, non-exclusive, paid-up license to use the Software
furnished to Company only in conjunction with Company's use of the Hardware with
respect to which such Software was furnished for the life of that Hardware as it
may be repaired or modified. Company shall be granted no title or ownership
rights to the Software, which rights shall remain in Nortel or its suppliers.

         10.3 As a condition precedent to this license and to the supply of
Software by Nortel pursuant to the Agreement, Nortel requires Company to give
proper assurances to Nortel for the protection of the Software. Accordingly, all
Software supplied by Nortel under or in implementation of the Agreement shall be
treated by Company as the exclusive property, and as proprietary and a trade
secret, of Nortel and/or its suppliers, as appropriate, and Company shall: a)
hold the Software, including, without limitation, any methods or concepts
utilized therein in confidence for the benefit of Nortel and/or its

<PAGE>

suppliers, as appropriate, b) not provide or make the Software available to any
person except to its employees on a 'need to know' basis; c) not reproduce,
copy, or modify the Software in whole or in part except as authorized by Nortel;
d) not attempt to decompile, reverse engineer, disassemble, reverse translate,
or in any other manner decode the Software; e) issue adequate instructions to
all persons, and take all actions reasonably necessary to satisfy Company's
obligations under This license; and f) forthwith return to Nortel, or with
Nortel's consent destroy i) upon termination of the license for any reason or
ii) upon receipt of replacement, modified, or updated Software, any magnetic
tape, disc, semiconductor device or other memory device or system and/or
Documentation or other material, including, but not limited to all printed
material furnished by Nortel to Company.

         10.4 The obligations of Company hereunder shall not extend to any
information or data relating to the Software which is now available to the
general public or becomes available by reason of acts or failures to act not
attributable to Company.

         10.5 Nortel may, from time to time, issue updates to the Software and,
upon Buyer's payment of applicable Right to Use Fees or Software License Fees,
if any, shall license these updates to Buyer. Nortel shall classify such updates
as either: 1) Incremental Software Upgrades ("ISUs"), designed to correct any
non-conformance to the applicable Software specifications or 2) enhancements
which will provide additional features ("Enhancement"). Updates to Software,
classified as ISUs by Nortel, will be provided at no cost to Buyer.
Notwithstanding the foregoing, ISUs and Enhancements shall not include the cost
of any associated hardware that may be required to update such ISUs. Updates
classified as Enhancements by Nortel, which will be used by Buyer in its
operations shall be made available to Buyer on a billable basis. In the event
Nortel determines that the update includes both ISUs and Enhancements which will
be used by Buyer in its operations, such update shall be made available to
Buyer. If Buyer elects to receive the update, Nortel shall invoice Buyer only
for amount determined by Nortel to be attributed to the Enhancements contained
in such update.

         10.6 Neither Company nor any successor to Company's title in the
applicable Hardware shall have the right to (i) assign this license as to The
applicable Software to any other party who acquires legal title to such
Hardware, or (ii) sublicense the rights herein granted as to such Software to
any person who subsequently acquires the right to use such Hardware unless
agreed to in writing by both Nortel and Company. Such consent shall not be
unreasonably withheld.

         10.7 Company shall indemnify and hold Nortel and its suppliers, as
appropriate, harmless from any loss or damage resulting from a breach of this
Article 10. The obligations of Company under this Article 10 shall survive the
termination of the Agreement and shall continue if the Software is removed from
service.

<PAGE>

NON-LICENSED SOFTWARE

         10.8 Certain Software delivered by Nortel may include Non- Licensed
Software. Non-Licensed Software includes (i) any Software for which the
applicable RTU fees have not been paid, and (ii) Software for which a periodic
RTU fee has expired and the applicable additional RTU fees have not been paid.
Company shall submit to Nortel an Order for any Non-Licensed Software that
Company desires to license.

         10.9 when Non-Licensed Software is placed into service, the applicable
RTU fees, if any, shall be payable. Company shall also have the option to pay
the applicable RTU fees for any Non- Licensed Software upon installation of a
Software load containing such Non-Licensed Software.

         10.10 To ensure Company's proper activation and/or usage of only the
appropriate Software, Company shall complete the appropriate form designated by
Nortel prior to the activation and/or usage by Company of any Non-Licensed
Software. Company shall identify all Software desired to be activated and/or
used (including the number of lines or other units activated, if applicable) in
each System and shall transmit such form to Nortel.

         10.11 Nortel shall promptly review any form submitted pursuant to
Section 10.10 and respond in writing, identifying whether (i) any applicable
prerequisite Hardware or Software is required by Company prior to activation
and/or usage of the applicable Software, or (ii) whether the use of such
Software requires Nortel to determine whether the current system configuration
will require additional elements, such as Hardware, other hardware and/or
memory, prior to activation and/or usage; or (iii) whether Company can use such
Software without the addition of any additional Hardware or Software.

         10.12 Nortel reserves the right to access by remote polling any site in
which Software was installed to determine which Software has been activated.
Such polling shall be done so as not to unreasonably interfere with Company's
use of the Product.

         10.13 Nortel shall issue invoices to Company, in addition to those
amounts previously invoiced, for amounts found to be payable as a result of
Company's activation and/or usage of any Software which Nortel discovers as a
result of the remote polling of a site and for which Company has not previously
paid the appropriate fee.

         10.14 The warranty period for Software activated later than the
original Ship Date of the Software load shall be as stated in the Agreement for
such original Software load and shall not be extended to provide for an
additional period of warranty based upon the date individual features or units
are activated and/or utilized by Company or the date Company pays any applicable
right-to-use fees.

<PAGE>

         10.15 If requested by Company, Nortel shall provide the Software
support Services specified in Article 9 or in a Services agreement provided that
Company maintains the Software within at least two previous Software Releases or
as otherwise specified in the Services agreement.

MODIFIABLE SOFTWARE

         10.16.1 Notwithstanding anything to the contrary above, upon payment to
Nortel of the applicable fees, Nortel hereby grants to Company, subject to the
applicable terms and conditions of this Agreement, a personal, non-transferable,
non-assignable and non-exclusive right to modify Software which Nortel
identifies as modifiable in its Documentation solely for the purpose of
modifying and creating Building Blocks and Applications. Upon the modification
or creation of any Applications, or the modification or creation of any Building
Blocks, Nortel shall have no obligations with regard to warranty under Article 8
or indemnity under Article 11 for such Applications or Building Blocks.

         10.16.2 Nothing contained in this Section 10.16 shall transfer, or be
deemed to transfer, or contemplate the transfer of, any rights in or to the
Software other than those rights specifically granted herein, and in particular
but without restricting the generality of the foregoing, Nortel does not in any
way transfer any right, title or interest in or to the Software or any element
constituting a portion thereof to Company, other than the right of Company to
modify or create Building Blocks and Applications.

         10.16.3 For any Building Blocks and Applications created solely by
Company, and for all modified portions of the Nortel-provided Building Blocks
with respect to such modified portion only, Company shall own all forms of
intellectual property rights (including but not limited to patent, trade secret,
copyright and mask rights) pertaining to such Applications, Building Blocks or
portions thereof and shall have the right to file for or otherwise secure and
protect such rights. For all such Company created Applications or Building
Blocks or modified portions of Building Blocks, the parties shall, on a case by
case basis, negotiate in good faith to determine whether Company may desire to
license any such Applications or Building Blocks to Nortel.

         10.16.4 For any Application created solely by Nortel, and for the
Nortel-provided Building Blocks, Nortel shall own all forms of intellectual
property rights (including but not limited to patent, trade secret, copyright
and mask rights) pertaining to such Applications or Building Blocks and shall
have the right to file for or otherwise secure and protect such rights. For all
such Nortel Applications or Building Blocks, Company may license any such
additional Nortel Products upon Nortel making such generally available to its
customers.

         10.16.5 In the event Company and Nortel intend to jointly create
Applications or Building Blocks, the parties shall mutually agree as to
applicable terms and conditions.

<PAGE>

SERVICES SOFTWARE

         10.17.1 With respect to Services Software, Company shall: i) utilize
such Services Software and the results thereof solely for the purposes described
Section 1.24; and ii) comply with additional terms, if any, applicable to such
Services Software as specified in a Product Annex. Nortel may, at any time and
without liability or obligation to Company, modify the Services Software, any
computer equipment of Nortel or suppliers used in connection with such Services
Software, and identification codes, manuals or other information or
Documentation used in connection with the Services Software.

         10.17.2 SERVICES SOFTWARE IS PROVIDED AS IS AND WITHOUT WARRANTY OR
CONDITION OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. NORTEL DOES NOT AND CANNOT WARRANT THE PERFORMANCE OR RESULTS THAT MAY
BE OBTAINED BY USING SERVICES SOFTWARE. COMPANY ASSUMES RESPONSIBILITY FOR THE
SELECTION OF THE SERVICES SOFTWARE TO ACHIEVE COMPANY'S INTENDED RESULTS, AND
FOR THE INSTALLATION, USE, AND RESULTS OBTAINED FROM THE SERVICES SOFTWARE. IN
NO EVENT WILL NORTEL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, PUNITIVE
OR CONSEQUENTIAL DAMAGES OR LOST REVENUES OR PROFITS OR OTHER ECONOMIC LOSS OF
ANY NATURE WHATSOEVER ARISING OUT OF NORTEL'S BREACH OF WARRANTY OR CONDITION.

ARTICLE II. LIABILITY FOR BODILY INJURY, PROPERTY DAMAGE AND PATENT INFRINGEMENT

         11.1 A party hereto shall defend the other party against any suit,
claim, or proceeding brought against the other party for direct damages due to
bodily injuries (including death) or damage to tangible property which allegedly
result from the negligence or willful misconduct of the defending party in the
performance of this Agreement. The defending party shall pay all litigation
costs, reasonable attorney's fees, settlement payments and such direct damages
awarded or resulting from any such suit, claim or proceeding.

         11.2 Nortel shall defend Company against any suit, claim or proceeding
brought against Company alleging that the sale to, or use by Company of, any
Products, excluding Third Party Hardware or Third Party Software, furnished
hereunder infringes any patent ("Infringement Claim"). Nortel shall pay all
litigation costs, reasonable attorney's fees, settlement payments and damages
awarded or resulting from any such suit, claim or proceeding. With respect to
Third Party Hardware or Third Party Software, Nortel shall assign any rights
with respect to infringement of patents granted to Nortel by the supplier of
such items to the extent of Nortel's right to do so.

<PAGE>

         11.3 Nortel's cumulative liability, pursuant to this Article 11 and
including its costs and expenses incurred in satisfying its obligations set
forth below, shall for each Infringement Claim, not exceed one hundred percent
(100%) of the purchase price of the Product giving rise to the Infringement
Claim.

         11.4 Nortel shall not be liable and Company shall indemnify Nortel for
any costs incurred by Nortel or liabilities of Nortel arising under this Article
in excess of the amounts so stated above.

         11.5 Nortel shall have no liability, in respect of any Infringement
Claim based on the use of a Product in the event such Product: (a) is
manufactured, designed or supplied by Nortel in accordance with any design or
any special instruction furnished by Company, (b) is used by Company in a manner
or for a purpose not contemplated by this Agreement, (c) is used by Company in
combination with other products not provided by Nortel, including, without
limitation, any software developed solely by Company through the permitted use
of Products furnished hereunder, provided the Infringement Claim arises from
such combination or the use thereof, (d) is modified by Company where such
modification is not authorized by Nortel, or (e) is used or located by Company
in a location other than the location in which and for which it was supplied by
Nortel. In the excepted cases stated above, Company shall indemnify and hold
Nortel harmless against any loss, cost, expense, damage, settlement or other
liability, including, but not limited to, attorneys' fees, which may be incurred
by Nortel with respect to any suit, claim, or proceeding described in this
Section 11.5.

         11.6 Nortel shall not be liable for, and Company shall indemnify Nortel
in respect of, any damages awarded based on Company's willful, knowing or
deliberate infringement of a patent, copyright, trade secret, trademark or other
proprietary right where such infringement results in a pecuniary damage award.

         11.7 Nortel may provide Company with notice of an actual or potential
Infringement Claim. Nortel shall consult with Company regarding the Infringement
Claim and the course of action to be pursued as a result thereof. In the event
the parties fail to agree on a satisfactory course of action for dealing with
the matter, Company may either:

                    (i) return to Nortel the affected portion of the Product(s)
                    in return for a refund of the depreciated value (as carried
                    on the books of Company) of the Product(s) so returned; or
                    (ii) continue to use the Product(s) at Company's own risk.

         11.8 Nortel shall not be liable for, and Company shall indemnify Nortel
in respect of any Infringement Claim(s) where Nortel has provided notice to
Company of the Infringement Claim(s) and Company elects to continue its use of
the Product(s) covered by the Infringement Claim.

<PAGE>

         11.9 If as a result of an Infringement Claim, other than those
contemplated above, an injunction is obtained against Company's use of any
Product, Nortel shall, at Nortel's option:

                    (i)       procure for Company the right to continue
                              using the alleged infringing Product(s);

                    (ii)      replace or modify the same with equivalent or
                              better Product(s) so that Company's use is
                              non-infringing; or

                    (iii)     accept return of the affected portion of the
                              Product(s) and refund to Company the depreciated
                              value (as carried on the books of Company) of the
                              Product(s) so returned.

         11.10 The defense of any claim which is predominantly covered by the
provisions of the Agreement shall be controlled by the party upon whom the
majority of the ultimate liability is likely to be imposed. Such controlling
party shall give the other party a reasonable opportunity to participate in
negotiation or defense of the claim so that such other Party may reasonably
protect its own interests. Neither Party shall be liable for any settlement
obligation incurred without its written consent.

         11.11 Company shall waive any and all claims that Company may have
against Nortel that Company may have due to any use by Company of Modifiable
Software and any modification Company may have made to a Product as a result of
such use. Further, Company shall be responsible for any additional hardware,
software or services required as a result of such use.

         11.12 THE REMEDIES SET FORTH IN THIS ARTICLE 11 ESTABLISH THE ENTIRE
OBLIGATION OF THE PARTIES IN REGARD TO CLAIMS RELATING TO INTELLECTUAL PROPERTY
RIGHTS INCLUDING CLAIMS DIRECTED TO THE INFRINGEMENT OF PATENTS, COPYRIGHT,
TRADE SECRETS AND OTHER PROPRIETARY RIGHTS. IN NO EVENT SHALL EITHER PARTY BE
LIABLE FOR ANY INCIDENTAL, PUNITIVE OR CONSEQUENTIAL DAMAGES, OR FOR LOST
REVENUES, PROFITS OR OTHER ECONOMIC LOSSES, ARISING FROM SUCH INFRINGEMENTS
AND/OR OTHER MATTERS, OTHER THAN AS SPECIFICALLY SET FORTH HEREIN.

<PAGE>

ARTICLE 12. REMEDIES AND LIMITATION OF LIABILITY

         12.1 Nortel shall have the right to suspend its performance, upon
written notice to Company, and forthwith remove and take possession of all
Products that shall have been delivered to Company, if, prior to payment to
Nortel of any amounts due pursuant to this Agreement with respect to such
Products, Company shall (a) become insolvent or bankrupt or cease, be unable, or
admit in writing its inability, to pay all debts as they mature, or make a
general assignment for the benefit of, or enter into any arrangement with,
creditors, (b) authorize, apply for, or consent to the appointment of, a
receiver, trustee, or liquidator of all or a substantial part of its assets or
have proceedings seeking such appointment commenced against it which are not
terminated within sixty (60) days of such commencement, or (c) file a voluntary
petition under any bankruptcy or insolvency law or under the reorganization or
arrangement provisions of the United States Bankruptcy Code or any similar law
of any jurisdiction or have proceedings under any such law instituted against it
which are not terminated within sixty (60) days of such commencement.

         12.2 In the event of any material breach of this Agreement which shall
continue for thirty (30) or more days after written notice of such breach
(including a reasonably detailed statement of the nature of such breach) shall
have been given to the breaching party by the aggrieved party, the aggrieved
party shall be entitled at its option to avail itself of any and all remedies
available at law or equity, except as otherwise provided for in this Agreement.

         12.3 Nothing contained in Section 12.2 or elsewhere in this Agreement
shall make Nortel liable for any indirect, incidental, punitive, special, or
consequential damages of any nature whatsoever for any breach of this Agreement
whether the claims for such damages arise in tort, contract, or otherwise.

         12.4 Nortel shall not be liable for any additional costs, expenses,
losses or damages resulting from errors, acts or omissions of Company,
including, but not limited to, inaccuracy, incompleteness or untimeliness in the
provision of information by Company to Nortel or a customer of Company or
fulfillment by Company of any of its obligations under this Agreement. Company
shall pay Nortel the amount of any such costs, expenses, losses or damage
incurred by Nortel.

         12.5 Any action for breach of this Agreement or to enforce any right
hereunder shall be commenced within two (2) years after the cause of action
accrues or it shall be deemed waived and barred, except any action for
nonpayment by Company of any prices, charges, or fees payable hereunder may be
brought by Nortel at any time permitted by applicable law, and Nortel may
suspend performance of any of its obligations hereunder until all such payments
are made.

<PAGE>

ARTICLE 13. CONTINUING AVAILABILITY

         13.1 For a period of five (5) years following the Ship Date of a
System, Nortel shall make spare parts, or their functional equivalent, available
for purchase by Company, so that Company may meet existing obligations relative
to the Products included in such System. Nortel shall also make available to
Company such information as is reasonably required in order to allow
functionally equivalent spare parts to perform with Products previously
delivered to Company. The prices charged for the spare parts following the
termination of this Agreement shall be Nortel's then current published list
price or its then current policy. In the event that Nortel is in material breach
of the obligation stated above and has not cured such breach within the time
period set forth in Section 12.2, should Nortel fail to provide said parts or to
obtain another source of supply, Nortel shall be required to provide to Company
(subject to the proper arrangements for confidentiality), at Company's request,
the technical information or any other rights required, so that Company is able
to obtain replacement parts on its own or through a third party. The technical
information includes, without limitation, (a) the most current Documentation,
including maintenance manuals, procedures and the like required to perform
maintenance, (b) manufacturing drawings and specifications of raw materials and
components comprising such parts and/or (c) manufacturing drawings and
specifications covering special tooling and the operations thereof.

         13.2 Nortel shall only be required to provide such technical
information which it has the legal right to supply and which Nortel is then
using in its day to day operations to manufacture Products or obtain parts.

         13.3 The provision of such technical information to Company shall not
preclude Nortel from selling or otherwise transferring any and all such
technical information or other rights to any third party.

         13.4 In the event Nortel intends to discontinue the availability of, or
support Service for, a major module of a Product (notice may not be provided for
component and individual circuit pack discontinuance), Nortel shall provide
Company with at least six (6) months' prior written notice of such event and the
applicable Product shall be considered manufacture discontinued or discontinued,
respectively, after such six (6) month period. Nortel shall have no obligation
to provide notice of manufacture discontinue if only components of a Product are
being replaced and such replacement does not materially affect form, fit or
function of the Product.

ARTICLE 14. TERM AND TERMINATION

         14.1 This Agreement will be in effect from the Effective Date and
shall, except as otherwise provided herein, continue in effect thereafter
through December 31, 2000 ("Term").

         14.2 Either party may delay performance under this Agreement or
terminate this Agreement, in whole or in part, in the event of a default by the
other, provided that

<PAGE>

the non-defaulting party so advises the defaulting party in writing of the event
of alleged default and the defaulting party does not remedy the alleged default
within thirty (30) days after written notice thereof. If the alleged default is
not capable of being remedied within thirty (30) days, the defaulting party must
commence to remedy the alleged default within such thirty (30) day period and
provide to the non-defaulting party a plan for timely remedying the alleged
default in order to avoid termination. Default is defined to include:

                    (i)       either party's insolvency or initiation of
                    bankruptcy or receivership proceedings by or against
                    the party;

                    (ii)      either party's material breach of any of the
                    terms or conditions hereof including the failure to make
                    any payment when due, if the amount of the payment due is
                    not in dispute; or

                    (iii) the execution by either party of an assignment for the
                    benefit of creditors or any other transfer or assignment of
                    a similar nature other than as provided for in Section 6.4.

         14.3 Termination of this Agreement for any cause shall not release
either party from any liability which at the time of termination has already
accrued to the other party or which thereafter may accrue in respect to any act
or omission prior to termination or from any obligation which is specified in
Section 16.18 below to survive termination.

ARTICLE 15. CONFIDENTIALITY

         15.1 Each party which receives the other party's Confidential
Information shall use reasonable care to hold such Confidential Information in
confidence and not disclose such Confidential Information to anyone other than
to its employees and employees of a Nortel Affiliate, as applicable, with a need
to know. A party that receives the other party's Confidential Information shall
not reproduce such Confidential Information, except to the extent reasonably
required for the performance of its obligations pursuant to this Agreement and
in connection with any permitted use of such Confidential Information.

         15.2 Company shall take reasonable care to use Nortel's Confidential
Information only for study, operating, or maintenance purposes in connection
with Company's use of Products furnished by Nortel pursuant to this Agreement.

         15.3 Notwithstanding the foregoing, either party shall be free to use
that portion of the Confidential Information which may be retained in intangible
form by those employees who have had access to the Confidential Information, for
any purpose, including use in the development, manufacture, marketing and
maintenance of its products and service. The marketing of any product or
service, including the dissemination of supporting documentation, which
inherently discloses the disclosing party's Confidential Information shall not
be deemed a breach by the recipient of such

<PAGE>

obligations provided however that ownership of the Confidential Information
and all intellectual property rights to such Confidential Information remain
with the disclosing party.

         15.4 The obligations of either party pursuant to this Article 15 shall
not extend to any Confidential Information which recipient can demonstrate
through written documentation was already known to the recipient prior to its
disclosure to the recipient, was known or generally available to the public at
the time of disclosure to the recipient, becomes known or generally available to
the public (other than by act of the recipient) subsequent to its disclosure to
the recipient, is disclosed or made available in writing to the recipient by a
third party having a bona fide right to do so, is independently developed by
recipient, or is required to be disclosed by process of law, provided that the
recipient shall notify the disclosing party promptly upon any request or demand
for such disclosure.

ARTICLE 16. MISCELLANEOUS

         16.1 PUBLICITY - A party shall not release, without the prior written
approval of the other party, any advertising or other publicity relating to this
Agreement wherein such other party may reasonably be identified. In addition,
each party shall take reasonable precautions to keep the existence of this
Agreement confidential so long as this Agreement remains in effect and for a
period of five (5) years thereafter, except as may be otherwise expressly
provided in this Agreement or as may be reasonably required to enforce this
Agreement by law.

         16.2 APPLICABLE LAW - The validity, construction and performance of
this Agreement shall be governed by and interpreted in accordance with the laws
of the State of North Carolina, except for its rules with regard to the conflict
of laws.

         16.3 EFFECTS OF HEADINGS - All headings used herein are for index and
reference purposes only, and shall not be given any substantive effect. This
Agreement has been created jointly by the parties and no rule of construction
requiring interpretation against the drafter of this Agreement shall apply in
its interpretation.

         16.4.1 ASSIGNMENT - Other than as explicitly stated below, neither
party may assign or transfer this Agreement or any of its rights hereunder
without the prior written consent of the other party, such consent not to be
unreasonably withheld. A change in control of Company shall be deemed an
assignment hereunder. A change in control shall occur if ownership or control of
more than 50% of the shares of the Company entitled to elect the Board of
Directors changes during the term of this Agreement. Company's consent shall not
be required for any assignment or transfer by Nortel (a) to any Nortel Affiliate
of all or any part of this Agreement or of Nortel's rights hereunder, or (b) to
any third party of Nortel's right to receive any monies ("Receivables") which
may become due to Nortel pursuant to this Agreement.

<PAGE>

         16.4.2 Company hereby consents to the sale of Receivables by Nortel
without the necessity for any further notice and without any qualification on
such consent. Company grants permission for Nortel to disclose the provisions of
this Agreement to purchasers and prospective purchasers of Receivables, or their
affiliates and others with a present or prospective financial interest in such
Receivables, and their respective agents, attorneys, auditors, rating agencies
and other advisors.

         16.5 SUBCONTRACTING - Nortel may subcontract any of its obligations
under this Agreement, but no such subcontract shall relieve Nortel of primary
responsibility for performance of its obligations.

         16.6 NON-WAIVER - The failure by either party hereto at any time to
require performance by the other party or to claim a breach of any provision of
this Agreement shall not be construed as affecting any subsequent breach or the
right to require the performance with respect thereto or to claim a breach with
respect thereto.

         16.7 RELATIONSHIP OF THE PARTIES - The provisions of this Agreement
shall not be construed to establish any form of partnership, agency or other
joint venture of any kind between Nortel and Company, nor to constitute either
party as the agent, employee or legal representative of the other. All persons
furnished by either party to accomplish the intent of this Agreement shall be
considered solely as the furnishing party's employees or agents and the
furnishing party shall be solely responsible for compliance with all laws, rules
and regulations involving, but not limited to, employment of labor, hours of
labor, working conditions, workers' compensation, payment of wages, and
withholding and payment of applicable taxes, including, but not limited to
income taxes, unemployment taxes, and social security taxes.

         16.8 FORCE MAJEURE - If the performance by a party of any of its
obligations under this Agreement shall be interfered with by reason of any
circumstances beyond the reasonable control of that party, including without
limitation, fire, explosion, acts of God, war, revolution, civil commotion,
unavailability of supplies or sources of energy, power failure, breakdown of
machinery, delays regarding zoning, easements or deed restrictions, any legal
proceedings between parties unrelated to the parties hereto or labor
difficulties, including without limitation, strikes, slowdowns, picketing or
boycotts, then that party shall be excused from such performance for a period
equal to the delay resulting from the applicable circumstances and such
additional period as may be reasonably necessary to allow that party to resume
its performance. With respect to labor difficulties as described above, a party
shall not be obligated to accede to any demands being made by employees or other
personnel.

         16.9 TAXES - Company shall at Nortel's direction promptly reimburse
Nortel or pay directly to the applicable government or taxing authority all
taxes and charges arising hereunder, including, without limitation, penalties
and interest, except for taxes computed upon the net income of Nortel.

<PAGE>

         16.10.1 HAZARDOUS MATERIALS - Prior to issuing any Order for Services
to be performed at Company's facilities, Company shall identify and notify
Nortel in writing of the existence of all Hazardous Materials which Nortel may
encounter during the performance of such Services, including without limitation,
any Hazardous Materials contained within any equipment to be removed by Nortel.

         16.10.2 If Company breaches its obligations pursuant to the immediately
preceding paragraph, (a) Nortel may discontinue the performance of the
applicable Services until all the Hazardous Materials have been removed or
abated to Nortel's satisfaction by Company at Company's sole expense, and (b)
Company shall defend, indemnify and hold Nortel harmless from any and all
damages, claims, losses, liabilities and expenses, including without limitation,
attorney's fees, which arise out of Company's breach of such obligations.

         16.11 NOTICE - All notices required or permitted to be given hereunder
shall be in writing and shall be deemed given when delivered (i) by hand, or
(ii) by facsimile, transmission (confirming the same by mail) or (iii) by
certified or next-day mail addressed as follows:

         If to Company:
         Logix Communications Corporation of Oklahoma
         13439 North Broadway Extension, Suite 200
         Oklahoma City, Oklahoma 73114
          Attention: Mr. Jeff Brzozowski
          Facsimile: (405) 516-8880

         If to Nortel:
         Northern Telecom Inc.
         4001 East Chapel Hill-Nelson Highway
         Research Triangle Park, North Carolina 27709
         Attention: Assistant Vice President, Contracts Management and
                    Negotiations
         Facsimile: (919) 992-8474

Either party hereto may change its address by a notice given to the other party
hereto in the manner set forth above.

                    16.11.1 SITE ACCESS AND PREPARATION - Company shall provide
         Nortel or its subcontractors with access to its sites during the times
         specified by Nortel and as are reasonably necessary for Nortel to
         perform its obligations

<PAGE>

         hereunder. Nortel shall comply with Company's reasonable site and
         security regulations.

                    16.11.2 All sites at which the Products shall be delivered
         or installed shall be prepared by Company in accordance with Nortel's
         standards, including, without limitation, environmental requirements.
         Prior to and during installation, Company shall ensure the timely
         and adequate delivery, installation and functioning of the electrical
         and telecommunications connections and other environmental
         requirements, including but not limited the HVAC systems, specified
         in Nortel's instructions, Specifications, Documentation or in a
         Product Annex.

                    16.11.3 Company shall provide reasonable working space and
         facilities, including heat, light, ventilation, telephones, electrical
         current, waste removal and other necessary utilities for use by
         Nortel-designated maintenance personnel, and adequate secure storage
         space, if required by Nortel, for Products and materials. Company shall
         also provide adequate security for the Products while on Company's
         site.

                    16.11.4 Company shall obtain all necessary governmental
         permits applicable to Company in connection with the installation,
         operation, and maintenance of Products furnished hereunder, excluding
         any applicable permits required in the normal course of Nortel's doing
         business. Any information which Nortel reasonably requests from Company
         and which is necessary for Nortel to properly install or maintain the
         Products shall be provided by Company to Nortel in a timely fashion and
         in a form reasonably specified by Nortel.

         16.12 INFORMATION AND DOCUMENTATION - Company shall provide any
information and/or documentation that Nortel reasonably requests from Company
and that is necessary for Nortel to properly perform any of its obligations
hereunder. Such information shall be provided in a form reasonably specified by
Nortel by the dates specified by Nortel.

         16.13 EXPORT - Company shall not export any Products or technical data
received from Nortel pursuant to this Agreement, or release any such Products or
technical data with the knowledge or intent that such will be exported or
transmitted to any country or to foreign nationals of any country, except in
accordance with applicable U.S. law concerning exporting and with written
consent of Nortel. Company shall obtain all government authorizations, in
accordance with applicable law prior to exporting or transmitting any such
Products or technical data.

         16.14 SEVERABILITY - If any provision of this Agreement is declared or
determined to be invalid or unenforceable under applicable law, the remaining
provisions shall continue in full force and effect and the parties shall
substitute for the invalid provision a valid provision which most closely
approximates the economic effect and intent of the invalid provision.

<PAGE>

         16.15 MODIFICATION OF AGREEMENT - No addition to or modification of
this Agreement shall be effective or binding on either of the parties hereto
unless reduced to writing and executed by the respective duly authorized
representatives of each of the parties hereto.

         16.16 REGULATORY COMPLIANCE - In the event of any change in the
Specifications or Nortel's manufacturing or delivery processes for any Products
as a result of the imposition of requirements by any government, Nortel may upon
notice to Company, increase its prices, charges and fees to cover the added
costs and expenses directly and indirectly incurred by Nortel as a result of
such change.

         16.17 ENTIRE AGREEMENT - This Agreement, including the Exhibits,
Schedules and Annexes which are attached hereto and incorporated herein,
comprises all the terms, conditions and agreements of the parties hereto with
respect to the subject matter hereof and supersedes all previous negotiations,
proposals, commitments, writings, publications and understandings of any nature
whatsoever. No Exhibits, Schedules or Annexes modified or created subsequent to
the execution of this Agreement shall be deemed to be incorporated into this
Agreement unless mutually agreed in a writing and signed by a duly authorized
representative of each party.

         16.18 SURVIVORSHIP - Any terms of this Agreement, which by their nature
are intended to survive including but not limited to Articles 8, 10, 11, 12, 15
and Sections 4.5, 9.3, 13.1, and 14.3 shall survive the termination or
expiration of this Agreement.

IN WITNESS WHEREOF, the parties have executed this Agreement.

NORTHERN TELECOM INC.                              LOGIX COMMUNICATIONS
                                                   CORPORATION OF OKLAHOMA

By: /s/ Cynthia C. Hemme                           By: /s/ Glenn Hall
   ---------------------------                        -------------------------
Name: Cynthia C. Hemme                             Name:  Glenn Hall
     -------------------------                          -----------------------
Title: Vice President                              Title: VP - National Dev &
       Marketing Contracts                                CVS
     -------------------------                           ----------------------
Date:    6/30/98                                   Date: 6/5/98
     -------------------------                          -----------------------
<PAGE>

                                    EXHIBIT A
                                PRODUCT ANNEX A.1

DMS-FAMILY SWITCHES

The supplemental terms and conditions provided below take precedence over any
conflicting terms and conditions specified, in the Sections noted below or
elsewhere, in the Agreement as such terms and conditions apply to the DMS-10,
DMS-100, DMS-200, DMS-100/200, DMS-250, DMS-300 or DMS-500 Products ("DMS-Family
Switches").

ARTICLE 4, SECTION 4.1

With regard to the subject of price, the following shall apply:

a.       DMS-10 discounts and discount application

         (i)        For Extensions, a discount of twenty five percent (25%)
                    ("Extension Discount") shall be applied to reduce the price
                    of Hardware and the fees for modular firmware. The Extension
                    Discount shall not apply to the fees for or price of
                    Software, Third Party Software, stock remotes, Orders placed
                    through Nortel Direct, Merchandise, vendor items and
                    Services.

         (ii)       For Extensions, the price of Hardware and fees for
                    modular firmware, as first reduced by the Extension
                    Discount, as appropriate, shall be further reduced by
                    the discount ("Volume Discount") of thirty-five
                    percent (35%), except as noted herein. The Volume
                    Discount shall not be applied to the fees for or price
                    of Software, Third Party Software, Merchandise, stock
                    remotes, Orders placed through Nortel Direct, vendor
                    items and Services.

b.       DMS-100, DMS-200, DMS-100/200, DMS-250, DMS-300 or DMS-500 discounts
         and discount application

         (i)        For Extensions, a discount of twenty five percent
                    (25%) ("Extension Discount") shall be applied to
                    reduce the price of Hardware and the fees for modular
                    firmware. The System Discount and Extension Discount
                    shall not apply to the fees for or price of Software,
                    Third Party Software, nondiscountable Hardware,
                    Merchandise, stock remotes, Orders placed through
                    Nortel Direct, vendor items and Services.

<PAGE>

         (ii)       For Extensions, the price of Hardware and fees for modular
                    firmware, as first reduced by the Extension Discount, as
                    appropriate, and the fees for Software shall be further
                    reduced by the discount ("Volume Discount") of thirty-five
                    percent (35%), except as noted herein. The Volume Discount
                    shall not be applied to the fees for or price of
                    nondiscountable system Software, Third Party Software,
                    nondiscountable Hardware, Merchandise, stock remotes,
                    Orders placed through Nortel Direct, vendor items and
                    Services.

c.       The Extension Discounts and Volume Discounts set forth in (a) and (b)
         above shall apply only in the event Nortel is awarded all the
         switching, transport, and access Products and Services delineated in
         Nortel's Quotation dated March 18, 1998 to Company's request for
         Quotation dated February 13, 1998 ("RFQ").

d.       In the event Company awards Nortel all the switching,
         transport, and access Products and Services as described in
         subparagraph (c) above, Company shall be entitled to certain
         special extension pricing ("Special Extension Pricing"), in
         lieu of the Extension Discount and Volume Discounts set
         forth in subparagraph (b) above, for purchase of the
         Hardware and/or license of Software only in the
         configurations as set forth in Attachment 1(a) through 1(c)
         to this Product Annex A.1. Such Special Extension Pricing
         shall be available for a period of up to fourteen (14)
         months after the Turnover Date of each of the twenty-five
         (25) Initial Systems to be purchased as set forth in the
         RFQ. Such Special Extension Pricing is inclusive of all
         discounts and charges for engineering and installation.

ARTICLE 4 SECTION 4.4

With regard to the subject of invoicing Company for Products and Services, the
following shall apply:

         (i)        for Extensions installed by Nortel, ninety percent
                    (90%) of the price and/or fees, as applicable, of the
                    Hardware and Software (excluding that part of the
                    price attributable to installation ("Installation
                    Charge")) shall be due and payable within thirty (30)
                    days of shipment of the Product to the Installation
                    Site or other location as agreed to by Company and
                    Nortel and upon receipt of invoice therefor,

         (ii)       ninety percent (90%) of the appropriate Installation Charge
                    shall be due and payable within thirty (30) days of Turnover
                    and upon receipt of invoice therefor,

         (iii)      upon Turnover but prior to the payment to Nortel of any
                    amount in excess of ninety percent (90%) of the total price
                    Company shall inspect the installation performed hereunder
                    and if the installation shall be found to materially conform
                    to the Specifications and all provisions hereunder

<PAGE>

                  performed, Company shall certify to that fact and as to the
                  amount of the balance due to Nortel. After such certification
                  has been issued by Company, but no later than thirty (30) days
                  after the date of Turnover, Nortel shall issue its invoice to
                  Company for any unpaid amounts to which Nortel shall be
                  entitled. Company shall pay such amounts to Nortel within
                  thirty (30) days of receipt of invoice unless approval by
                  Company shall be withheld because of the failure of the
                  installation to materially conform to the Specifications and
                  the failure of all provisions to be performed hereunder by
                  Nortel.

         (iv)     For each Extension furnished to Company hereunder but not
                  installed by Nortel one hundred percent (100%) of the net
                  price shall be invoiced upon delivery of such Extension to
                  the Installation Site loading door or other location as
                  agreed to by Company and Nortel.

ARTICLE 5, SECTION 5.1

With regard to the subject of reschedule of an Order, the following shall apply:

         . Sixty (60) days notice must be provided to Supplier prior to the
           scheduled Ship Date.

ARTICLE 6, SECTION 6.3

With regard to the subject of Company performing Installation of any of the
DMS-Family Switches, the following shall apply:

         . Company shall not initially have the right to perform Installation
           Services, but may obtain the right to install certain DMS-Family
           Switch Products, subject to attending applicable training courses,
           obtaining the required training certifications to perform same and
           obtaining Supplier's written concurrence to do so.

ARTICLE 7, SECTION 7.1

With regard to the subject of Company's cancellation of an Order, the following
shall apply:

         In the event Company cancels all or any part of an Order, Company shall
         pay to Supplier a cancellation charge for each Product that has been
         canceled in accordance with the following schedule:
<TABLE>
           <S>                                       <C>
           . 90 days or more prior to Ship Date      100% of Engineering Charges
           . 30-89 days prior to Ship Date           100% of Engineering Charges
                                                     plus 25% of remainder of Order amount
                                                     (less the Installation Charges)
           . 0-29 days prior to Ship Date            100% of Order amount
</TABLE>

<PAGE>

ARTICLE 10, SECTION 10.1

With regard to the subject of Third Party Software, the following shall apply:

 . At this time, there are no additional terms with regard to Third Party
  Hardware or Third Party Software that must be observed by Company.

<PAGE>

                      ATTACHMENT 1(a) TO PRODUCT ANNEX A.1

                            DTEI Frame Configuration

<TABLE>
<CAPTION>
Hardware:
                   Part Number                        V    Part Description                      Qty
                   -------------------------------    -    ---------------------------------   -------
<S>                <C>                                <C>  <C>                                 <C>
                   < < DTD0 > > ISDN DTE
                   NT6X50AB                                DS-1 E.F.F. CARD CP                    20
                   NTZZO2FB                                UNIVERSAL TONE RECEI                    2
                        NT6X92BC                           DOMESTIC UNIVERSAL T                    4

                   NTZZ02HN                                D5512 NETWORK INTERP                    2
                        NT6X40FB                           LINK CONTROL CARD                       4
                        NT6X40GA                           DS-512 LINK CONTROL                     4

                   NTZZ02UA                                XPM PERIPHERAL LOADE                    2
                        NT7X05AA                           ENHANCED PERIPERAL L                    4

                   NTZZ17AT                                CPCE FRAME-EARTHQUAK                    1
                        NT0X25AH                           EARTHQUAKE FRWK ASSY                    1
                        NT3X90AC                           DC FAN COOLING UNIT                     1
                        NT6X01AD                           ISDN READY XPM FRAME                    1
                        NT6X0250                           UNIVERSAL GROUND POI                    1
                        NT6X02UF                           UNIVERSAL FIBER KIT-                    2

                   NTZZ17GJ                                ISDN COMMON PERIPH C                    2
                        NT0X50AA                           FILLER FACE PLATE                      16
                        NT2X70AF                           POWER CONVERTER                         4
                        NT6X02NA                           ISDN CPCI COMMON CIR                    2
                        NT6X44AA                           TIME SWITCH CP                          4
                        NT6X69AD                           MESSAGE PROTOCOL & T                    4
                        NTBX01BA                           ENHANCED ISDN SIGNAL                    4
                        NTMX71AA                           XPM PLUS TERMINATOR                     4
                        NTMX77AA                           PROCESSOR CP WI SMB                     4

                   < < FWA0 > > FRAMEWORK
                   CABLEANDFRAME                           ESTIMATION FOR CABLE                    1

<CAPTION>
Software:        Feature Software                                          Package
                 --------------------------------------------------------  --------
<S>                                                                        <C>
                 NIO NI-1 PRI                                              NI000011
                 NIO NI-1 PRI NETWORKING                                   NI000013
                 NI0 ISDN PRI BASE                                         N1000022

TOTAL NET PRICE:                                                          $153,600.00
</TABLE>

<PAGE>

                      ATTACHMENT 1(b) TO PRODUCT ANNEX A.1

                            MVIE Frame Configuration

<TABLE>
<CAPTION>
Hardware:
                           Part Number                        V    Part Description                              Qty
                           --------------------------------   -    -----------------------------------------   -----
                           <S>                                    <C>                                           <C>
                           < < FWAO > > FRAMEWORK
                           CABLEANDFRAAE                           ESTIMATION FOR CABLE                            1

                           < < MVK0 > > ESMA EQUIP
                           NT6X40FB                                LINK CONTROL CARD                               4
                           NT6X40GA                                DS-512 LINK CONTROL                             4
                           NT6X92BC                                DOMESTIC UNIVERSAL T                            4
                           NTMX79AB                                DS60 EXTENDER PACK                              4
                           NTMX81AA                                DUAL TI CPANE                                  48
                           NTMX87AA                                QUAD PCM CARRIER                               12
                           NTQX90AA                                MULTI-VENDOR MAIN FR                            1
                           NTRX54BA                                FAN POWER CONTROL MO                            1
                           NTZZ03SY                                SMA2 COMMON CP PACKF                            2
                                NT0X50AA                           FILLER FACE PLATE                               4
                                NTAX74AA                           16MB PERIPHERAL PROC                            4
                                NTBX01BA                           ENHANCED ISDN SIGNAL                            4
                                NTMX72AB                           POWER CONVERTER                                 4
                                NTMX73BA                           SIGNALLING PROCESSOR                            4
                                NTMX75BA                           ENHANCED MATRIX                                 4
                                NTMX76CA                           ESMA MESSAGING PACK                             4

                           NTZZ12UA                                RSCS CLASS MODEM RES                            2
                                NT6X78AB                           CLASS MODEM RESOURCE                            4

                           < < PDA0 > > Pwr Dist Cont

                           A0205210                           *    DUMMY FUSE                                     -4
                           NT0X42AS                                30AMP DISTRI FUSING                             4

<CAPTION>
Software:                  Feature Software                                          Package
                           ------------------------------------------------------    -------------------------------
<S>                                                                                  <C>
                           BAS GENERIC                                               BAS00003
                           SMA TR303 I/F                                             SMA00001

TOTAL NET PRICE:                                                                     $129,600.00
</TABLE>

<PAGE>

                      ATTACHMENT 1(c) TO PRODUCT ANNEX A.1

                             DTE Frame Configuration

<TABLE>
<CAPTION>
Hardware:                  Part Number                        V    Part Description                              Qty
                           -------------------------------  -----  ------------------------------------------  ------
<S>                                                         <C>    <C>                                         <C>
                           < < DTAO > > Dig Trk Equip

                           NT6X50AB                                DS-1 E.F.F. CARD CP                            20
                           NTZZ02FB                                UNIVERSAL TONE RECEI                            2
                              NT6X92BC                             DOMESTIC UNIVERSAL T                            4

                           NTZZ02HN                                DS512 NETWORK INTERP                            2
                                NT6X40FB                           LINK CONTROL CARD                               4
                                NT6X40GA                           DS-512 LINK CONTROL                             4

                           NTZZ04HD                                DTC MODULE COMMON CI                            2
                                NT0X50AA                           FILLER FACE PLATE                              16
                                NT2X70AF                           POWER CONVERTER                                 4
                                NT6X02CZ                           DTC PACKFILL                                    2
                                NT6X44AA                           TIME SWITCH CP                                  4
                                NT6X69AD                           MESSAGE PROTOCOL & T                            4
                                NTMX71AA                           XPM PLUS TERMINATOR                             4
                                NTMX77AA                           PROCESSOR CP W/ 8MB                             4

                           NTZZ17AT                                CPCE FRAME-EARTHQUAK                            1
                                NT0X25AH                           EARTHQUAKE FRWK ASSY                            1
                                NT3X90AC                           DC FAN COOLING UNIT                             1
                                NT6X01AD                           ISDN READY XPM FRAME                            1
                                NT6X0250                           UNIVERSAL GROUND P0I                            1
                                NT6X02UF                           UNIVERSAL FIBER KIT-                            2

                           < < PDA0 > > Pwr Dist Cont

                           NT0X42AK                                FUSE 20 AMP                                     4
                           NT0X42AN                                FUSE 5 AMP                                      2

TOTAL NET PRICE:                                                                                      $115,200.00
</TABLE>

<PAGE>

                                         EXHIBIT A
                                     PRODUCT ANNEX A.2

TRANSPORTNODE/ACCESSNODE PRODUCTS

The supplemental terms and conditions provided below take precedence over any
conflicting terms and conditions specified, in the Sections noted below or
elsewhere, in the Agreement as such terms and conditions apply to Supplier's
TransportNode or AccessNode Products.

ARTICLE 4, SECTION 4.1

With regard to the subject of price, the following shall apply:

(a)      For purchases of TransportNode Products during the Term, the table
         below sets forth the level of discounts which shall be applied to the
         list price of the corresponding Products (set forth below) to reduce
         the price of such Products ("Volume Discount").

<TABLE>
<CAPTION>

         Products               Discounts
         --------               ---------
         <S>                    <C>
         OC3X                      30%
         OC12                      37%
         OC48                      40%
</TABLE>

(b)      For purchases of AccessNode Products during the Term, the table below
         sets forth the level of discounts which shall be applied to the list
         price of the corresponding Products (set forth below) to reduce the
         price of such Products ("Volume Discount").
<TABLE>
<CAPTION>

         Products                                         1998-1999           2000
         --------                                         ---------           ----
        <S>                                                 <C>               <C>
         AccessNode                                          47%               49%
         AccessNode Express                                  47%               49%
         Epsilon II Linecard                                 47%               49%
         Epsilon Station Linecard                            47%               49%
         MFA150                                              22%               22%
</TABLE>

The Volume Discounts set forth in (a) and (b) above shall apply only in the
event Nortel is awarded all the switching, transport, and access Products and
Services to fulfill all of Company's requirements delineated in the RFQ.

<PAGE>

ARTICLE 4, SECTION 4.4

With regard to the subject of invoicing Company for Products and Services, the
following shall apply:

         (i)          for Systems installed by Nortel, ninety percent (90%)
                      of the price and/or fees of the Hardware and Software
                      (excluding that part of the price attributable to
                      installation ("Installation Charge")) shall be due and
                      payable within thirty (30) days of shipment of the
                      Hardware, and Software to the Installation Site or other
                      location as agreed to by Company and Nortel;

         (ii)         the remaining ten percent (10%) of the price and/or fees
                      of the Hardware and Software shall be due and payable
                      within ninety (90) days of shipment of the Hardware and
                      Software to the Installation Site or other location as
                      agreed to by Company and Nortel;

         (iii)        ninety percent (90%) of the appropriate Installation
                      Charge shall be due and payable within thirty (30) days of
                      Turnover; and

         (iv)         upon Turnover, Company shall inspect the installation
                      performed hereunder and if the installation shall be
                      found to materially conform to the Specifications and
                      all provisions hereunder performed, Company shall
                      certify as to that fact. After such certification has
                      been issued by Company, but no later than thirty (30)
                      days after the date of Turnover, Nortel shall issue
                      its invoice to Company for any unpaid amounts to
                      which Nortel shall be entitled. Company shall pay
                      such amounts to Nortel within thirty (30) days of
                      receipt unless approval by Company shall be withheld
                      because of the failure of the installation to
                      materially conform to the Specifications and the
                      failure of all provisions to be performed hereunder
                      by Nortel.

         (v)          For each Product furnished to Company hereunder but not
                      installed by Nortel one hundred percent (100%) of the
                      price shall be invoiced upon delivery of such Product to
                      the Installation Site or other location as agreed to by
                      Company and Nortel.

<PAGE>

ARTICLE 5, SECTION 5.1

With regard to the subject of reschedule of an Order, the following shall apply:

      - Ten (10) days notice must be provided to Supplier prior to the scheduled
        Ship Date.

ARTICLE 6, SECTION 6.3

With regard to the subject of Company performing Installation of any of the
TransportNode or AccessNode Products, the following shall apply:

         . Company shall not initially have the right to perform Installation
           Services, but may obtain the right to install the TransportNode or
           AccessNode Products, subject to attending applicable training
           courses, obtaining the required training certifications to perform
           same and obtaining Supplier's written concurrence to do so.

ARTICLE 7, SECTION 7.1

With regard to the subject of Company's cancellation of an Order, the following
shall apply:

         In the event Company cancels all or any part of an Order, Company shall
         pay to Supplier a cancellation charge for each Product that has been
         canceled in accordance with the following schedule:
<TABLE>
            <S>                                    <C>
            . 15 days or more prior to Ship Date    No Charges
            . 0-14 days prior to Ship Date          100% of Engineering Charges
                                                    plus 15% of remainder of
                                                    Order amount (less the
                                                    Installation Charges)
            . After scheduled Ship Date             100% of Order amount
</TABLE>
ARTICLE 10, SECTION 10.1

          . At this time, there are no additional terms with regard to Third
            Party Hardware or Third Party Software that must be observed by
            Company.

<PAGE><PAGE>

                         WORLDCOM NETWORK SERVICES, INC.

                      CLASSIC/TRANSCEND-TM- SWITCHED SERVICES

                      TELECOMMUNICATIONS SERVICES AGREEMENT

         This Telecommunications Services Agreement (the "TSA") is entered into
as of the ____ day of June, 1998, by and between WORLDCOM NETWORK SERVICES,
INC., a Delaware corporation, with its principal office at One Williams Center,
Tulsa, Oklahoma 74172 ("WORLDCOM") and LOGIX COMMUNICATIONS CORPORATION, an
Oklahoma corporation, with its principal office at 13439 North Broadway
Extension, Oklahoma City, Oklahoma 73114 ("Customer").

         In consideration of good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows:

1.        SWITCHED SERVICES; OTHER DOCUMENTS; START OF SERVICE.

         (A) SERVICES WorldCom agrees to provide and Customer agrees to accept
         and pay for switched telecommunications services and other associated
         services (collectively the "SWITCHED SERVICES") as further described in
         the "SERVICE SCHEDULE" attached hereto and incorporated herein by
         reference, which describes the particular services, specific terms and
         other information necessary or appropriate for WorldCom to provide the
         Service to Customer. The Switched Services provided by WorldCom are
         subject to (i) the terms and conditions contained in this TSA and the
         Program Enrollment Terms (the "PET") which are attached hereto and
         incorporated herein by reference, (ii) the rates and discounts set
         forth in the applicable Rate and Discount Schedule (the "RATE
         SCHEDULE") attached hereto and incorporated herein by reference, and
         (iii) each Service Request (described below) which is accepted
         hereunder. The PET, as subscribed to by the parties, shall set forth
         the Effective Date, the Service Term, Customer's minimum monthly
         commitment, if any, and other information necessary to provide the
         Switched Services under this TSA. In the event of a conflict between
         the terms of this TSA, the PET, the Service Schedule, the Rate Schedule
         and the Service Request(s), the following order of precedence will
         prevail: (1) the PET, (2) the, Rate Schedule, (3) the Service Schedule,
         (4) this TSA, and (5) Service Request(s). This TSA, the PET, the
         Service Schedule and the applicable Rate and Discount Schedule are
         sometimes collectively referred to as the "AGREEMENT".

         (B) SERVICE REQUESTS Customer's requests to initiate or cancel Switched
         Services shall be described in an appropriate WorldCom Service Request
         ("SERVICE REQUEST"). A Service Request may consist of machine readable
         tapes, facsimiles or other means approved by WorldCom. Further, Service
         Requests shall specify all reasonable information, as determined by
         WorldCom, necessary or appropriate for WorldCom to provide the Switched
         Service(s) in question, which shall include without limitation, the
         type, quantity and end point(s) (when necessary) of circuits comprising
         a Service Interconnection as described in the applicable Service
         Schedules, or automatic number identification ("ANI") information
         relevant to the Switched Service(s), the Requested Service Date, and
         charges, if any, relevant to the Switched Services described in the
         Service Request. After WorldCom's receipt and verification of a valid
         Service Request for SWITCHED ACCESS Service (as defined in the Service
         Schedule) requiring a change in the primary interexchange carrier
         ("PIC"), WorldCom

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         agrees to (i) submit the ANI(s) relevant to such Service Requests to
         the following local exchange carriers ("LECs") (with which WorldCom
         currently has electronic interface capabilities) within ten (10) days:
         Ameritech, Bell Atlantic, BellSouth, Nynex, Pacific Bell, Southwestern
         Bell, US West, GTE and United, and (ii) submit the ANI(s) relevant to
         such Service Requests to those LECs with which WorldCom does not have
         electronic interface capabilities within a reasonable time.

         (C) START OF SERVICE WorldCom's obligation to provide and Customer's
         obligation to accept and pay for non-usage sensitive charges for
         Switched Services shall be binding to the extent provided for in this
         Agreement upon the submission of an acceptable Service Request to
         WorldCom by Customer. Customer's obligation to pay for usage sensitive
         charges for Switched Services shall commence with respect to any
         Switched Service as of the date the Switched Service in question is
         made available to and used by Customer ("START OF SERVICE"), but in no
         event later than the "REQUESTED SERVICE DATE" if such Switched Service
         is available for Customer's use as of such Requested Service Date.
         Start of Service for particular Services shall be further described in
         the Service Schedule relevant to the Switched Services in question.

2.       CANCELLATION.

         (A) CANCELLATION CHARGE At any time after the Effective Date, Customer
         may cancel this Agreement if Customer provides written notification
         thereof to WorldCom not less than thirty (30) days prior to the
         effective date of cancellation. In such case (or in the event WorldCom
         terminates this Agreement as provided in Section 7), Customer shall pay
         to WorldCom all charges for Services provided through the effective
         date of such cancellation plus a cancellation charge (the "CANCELLATION
         CHARGE") equal to one hundred percent (100%) of Customer's
         commitment(s), if any, (as described in the PET) that would have become
         due for the unexpired portion of the Service Term.

         (B) LIQUIDATED DAMAGES It is agreed that WorldCom's damages in the
         event Customer cancels this Agreement shall be difficult or impossible
         to ascertain. The provision for a cancellation charge in Subsection
         2(A) above is intended, therefore, to establish liquidated damages in
         the event of a cancellation and is not intended as a penalty.

         (C) CANCELLATION WITHOUT CHARGE Notwithstanding anything to the
         contrary contained in Subsection 2(A) above, Customer may cancel this
         Agreement without incurring any cancellation charge if (i) WorldCom
         fails to provide a network as warranted in Section 8 below; (ii)
         WorldCom fails to deliver call detail records promptly based on the
         frequency selected by Customer (i.e., monthly, weekly or daily); or
         (iii) WorldCom fails to submit ANI(s) relevant to such Service Requests
         to the LECs within the time period described in Subsection 1(B) above.
         Provided, however, Customer must give WorldCom written notice of any
         such default and an opportunity to cure such default within five (5)
         days of the notice. In the event WorldCom fails to cure any such
         default within the five-day period on more than three (3) occasions
         within any six (6) month period, Customer may cancel this Agreement
         without incurring any cancellation charge.

3.       CUSTOMER'S END USERS.

         (A) END USERS Customer will obtain and upon WorldCom's request provide
         WorldCom (within two (2) business days of the date of the request) a
         written Letter of Agency ("LOA")

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         acceptable to WorldCom [or with any other means approved by the Federal
         Communications Commission ("FCC") or any applicable public utility
         commission ("PUC")], for each ANI indicating the consent of such end
         user of Customer ("End User") to be served by Customer and transferred
         (by way of change of such End User's designated PIC) to the WorldCom
         network prior to order processing. Each LOA will provide, among other
         things, that the End User has consented to the transfer being performed
         by Customer or Customer's designee. When applicable, Customer will be
         responsible for notifying its End Users, in writing (or by any other
         means approved by the FCC) that (i) a transfer charge will be reflected
         on their LEC bill for effecting a change in their PIC, (ii) the entity
         name under which their interstate, intrastate and/or operator services
         will be billed (if different from Customer), and (iii) the "primary"
         telephone number(s) to be used for maintenance and questions concerning
         their long distance service and/or billing. Customer agrees to send
         WorldCom a copy of the documentation Customer uses to satisfy the above
         requirements promptly upon request of WorldCom. WorldCom may change the
         foregoing requirements for Customer's confirming orders and/or for
         notifying End Users regarding the transfer charge at any time in order
         to conform with applicable FCC and state regulations. Provided,
         however, Customer will be solely responsible for ensuring that the
         transfer of End Users to the WorldCom network conforms with applicable
         FCC and state regulations, including without limitation, the
         regulations established by the FCC with respect to verification of
         orders for long distance service generated by telemarketing as
         promulgated in 47 C.F.R., Part 64, Subpart K, Section 64.1100 or any
         successor regulation(s).

         (B) TRANSFER CHARGES/DISPUTED TRANSFERS Customer agrees that it is
         responsible for (i) all charges incurred by WorldCom to change the PIC
         of End Users to the WorldCom network, (ii) all charges incurred by
         WorldCom to change End Users back to their previous PIC arising from
         disputed transfers to the WorldCom network plus, at WorldCom's option,
         an administrative charge equal to twenty percent (20%) of such charges,
         and (iii) any other damages suffered by or awards against WorldCom
         resulting from disputed transfers.

         (C) EXCLUDED ANIs WorldCom has the right to reject any ANI supplied by
         Customer for any of the following reasons: (i) WorldCom is not
         authorized to provide or does not provide long distance services in the
         particular jurisdiction in which the ANI is located, (ii) a particular
         ANI submitted by Customer is not in proper form, (iii) Customer is not
         certified to provide long distance services in the jurisdiction in
         which the ANI is located, (iv) Customer is in material default of this
         Agreement, (v) Customer fails to cooperate with WorldCom in
         implementing reasonable verification processes determined by WorldCom
         to be necessary or appropriate in the conduct of business, or (vi) any
         other circumstance reasonably determined by WorldCom which could
         adversely affect WorldCom's performance under this Agreement or
         WorldCom's general ability to transfer its other customers or other end
         users to the WorldCom network, including without limitation, WorldCom's
         ability to electronically effect PIC changes with the LECs. In the
         event WorldCom rejects an ANI, WorldCom will notify Customer of its
         decision specifically describing the rejected ANI and the reason(s) for
         rejecting that ANI, and will not incur any further liability under this
         Agreement with regard to that ANI. Further, any ANI requested by
         Customer for Switched Services may be deactivated by WorldCom if no
         Switched Services billings relevant thereto are generated in any three
         (3) consecutive calendar month/billing periods. WorldCom will be under
         no obligation to accept ANIs within the last full calendar month period
         preceding the scheduled expiration of the Service Term.

         (D) RECORDS Customer will maintain documents and records ("RECORDS")
         supporting Customer's re-sale of Switched Services, including, but not
         limited to, appropriate and valid LOAs from End Users for a period of
         not less than (twelve) 12 months or such longer period as may be
         required by applicable law, rule or regulation. Customer shall
         indemnify WorldCom for

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         any costs, charges or expenses incurred by WorldCom arising from
         disputed PIC selections involving Switched Services to be provided to
         Customer for which Customer cannot produce an appropriate LOA relevant
         to the ANI and PIC charge in question, or when WorldCom is not
         reasonably satisfied that the validity of a disputed LOA has been
         resolved.

         (E) CUSTOMER SERVICE Customer will be solely responsible for billing
         its End Users and providing such End Users with customer service.
         Customer agrees to notify WorldCom as soon as reasonably possible in
         the event an End User notifies Customer of problems associated with the
         Switched Services, including without limitation, excess noise, echo, or
         loss of service.

4.       CUSTOMER'S RESPONSIBILITIES.

         (A) EXPEDITE CHARGES In the event Customer requests expedited services
         and/or changes to Service Requests and WorldCom agrees to such request,
         WorldCom will pass through the charges assessed by any supplying
         parties (e.g., local access providers) for such expedited charges
         and/or changes to Service Requests involved at the same rate to
         Customer. WorldCom may further condition its performance of such
         request upon Customer's payment of such additional charges to WorldCom.

         (B) FRAUDULENT CALLS Customer shall indemnify and hold WorldCom
         harmless from all costs, expenses, claims or actions arising from
         fraudulent calls of any nature which may comprise a portion of the
         Switched Services to the extent that the party claiming the call(s) in
         question to be fraudulent is (or had been at the time of the call) an
         End User of such Switched Services through Customer or an end user of
         the Switched Services through Customer's distribution channels.
         Customer shall not be excused from paying WorldCom for Switched
         Services provided to Customer or any portion there&f on the basis that
         fraudulent calls comprised a corresponding portion of the Switched
         Services. In the event WorldCom discovers fraudulent calls being made
         (or reasonably believes fraudulent calls are being made), nothing
         contained herein shall prohibit WorldCom from taking immediate action
         (without notice to Customer) that is reasonably necessary to prevent
         such fraudulent calls from taking place, including without limitation,
         denying Switched Services to particular ANIs or terminating Switched
         Services to or from specific locations.

5.       CHARGES AND PAYMENT TERMS.

         (A) PAYMENT WorldCom billings for Switched Services hereunder are made
         on a monthly basis (or such other basis as may be mutually agreed to by
         the parties) following Start of Service. Subject to Subsection 5(C)
         below, Switched Services shall be billed at the rates set forth in the
         applicable Rate and Discount Schedule attached hereto. Customer will be
         notified of WorldCom's time of day rate periods (including WorldCom
         Recognized National Holidays). Discounts, if any, applicable to the
         rates for certain Services are set forth in the Rate and Discount
         Schedule. Customer will pay all undisputed charges relative to each
         WorldCom invoice for Switched Services within thirty (30) days of the
         invoice date set forth on each WorldCom invoice to Customer ("DUE
         DATE"). If payment is not received by WorldCom on or before the Due
         Date, Customer shall also pay a late fee in the amount of the lesser of
         one and one-half percent (1 1/2%) of the unpaid balance of the charges
         for Switched Services rendered per month or the maximum lawful rate
         under applicable state law.

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         (B) TAXES Customer acknowledges and understands that WorldCom computes
         all charges herein exclusive of any applicable federal, state or local
         use, excise, gross receipts, sales and privilege taxes, duties, fees or
         similar liabilities (other than general income or property taxes),
         whether charged to or against WorldCom or Customer because of the
         Switched Services furnished to Customer ("ADDITIONAL CHARGES").
         Customer shall pay such Additional Charges in addition to all other
         charges provided for herein. Customer will not be liable for certain
         Additional Charges if Customer provides WorldCom with an appropriate
         exemption certificate.

         (C) MODIFICATION OF CHARGES WorldCom reserves the right to eliminate
         particular Switched Services and/or modify charges for particular
         Switched Services (which charge modifications shall not exceed
         then-current generally available WorldCom charges for comparable
         services), upon not less than sixty (60) days prior notice to Customer,
         which notice will state the effective date for the charge modification.
         In the event WorldCom notifies Customer of the elimination of a
         particular Switched Service and/or an increase in the charges, Customer
         may terminate this Agreement without incurring a cancellation charge
         only with respect to the Switched Service(s) affected by the increase
         in charges. In order to cancel such Switched Service(s), Customer must
         notify WorldCom, in writing, at least thirty (30) days prior to the
         effective date of the increase in charges. In the event Customer
         cancels its subscription to a particular Switched Service as described
         in this Subsection 5(C), WorldCom and Customer agree to negotiate in
         good faith concerning Customer's minimum monthly commitment, if any,
         described in the PET.

         (D) BILLING DISPUTES Notwithstanding the foregoing, amounts reasonably
         disputed by Customer (along with late fees attributable to such
         amounts) shall apply but shall not be due and payable for a period of
         sixty (60) days following the Due Date therefor, provided Customer (i)
         pays all undisputed charges on or before the Due Date, (ii) presents a
         written statement of any billing discrepancies to WorldCom in
         reasonable detail on or before the Due Date of the invoice in question,
         and (iii) negotiates in good faith with WorldCom for the purpose of
         resolving such dispute within said sixty (60) day period. In the event
         such dispute is mutually agreed upon and resolved in favor of WorldCom,
         Customer agrees to pay WorldCom the disputed amounts together with any
         applicable late fees within ten (10) days of the resolution (the
         "ALTERNATE DUE DATE"). In the event such dispute is mutually agreed
         upon and resolved in favor of Customer, Customer will receive a credit
         for the disputed charges in question and the applicable late fees. In
         the event WorldCom has responded to Customer's dispute in writing and
         the parties fail to mutually resolve or settle the dispute within such
         sixty (60) day period (unless WorldCom has agreed in writing to extend
         such period) all disputed amounts together with late fees shall become
         due and payable, and this provision shall not be construed to prevent
         Customer from pursuing any available legal remedies. WorldCom shall not
         be obligated to consider any Customer notice of billing discrepancies
         which are received by WorldCom more than sixty (60) days following the
         Due Date of the invoice in question.

6.       CREDIT; CREDITWORTHINESS:

         (A) CREDIT Customer's execution of this Agreement signifies Customer's
         acceptance of WorldCom's initial and continuing credit approval
         procedures and policies. WorldCom reserves the right to withhold
         initiation or full implementation of any or all Switched Services under
         this Agreement pending WorldCom's initial satisfactory credit review
         and approval thereof which may be conditioned upon terms specified by
         WorldCom, including, but not limited to, security for payments due
         hereunder in the form of a cash deposit or other means. WorldCom
         reserves the right to modify its requirements, if any, with respect to
         any security or other assurance provided by Customer for payments due
         hereunder in light of Customer's

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         actual usage when compared to projected usage levels upon which any
         security or assurance requirement was based.

         (B) CREDITWORTHINESS If at any time there is a material adverse change
         in Customer's creditworthiness, then in addition to any other remedies
         available to WorldCom, WorldCom may elect, in its sole discretion, to
         exercise one or more of the following remedies: (i) cause Start of
         Service for Switched Services described in a previously executed
         Service Request to be withheld; (ii) cease providing Switched Services
         pursuant to a Suspension Notice in accordance with Section 7(A); (iii)
         decline to accept a Service Request or other requests from Customer to
         provide Switched Services which WorldCom may otherwise be obligated to
         accept and/or (iv) condition its provision of Switched Services or
         acceptance of a Service Request on Customer's assurance of payment
         which shall be a deposit or such other means to establish reasonable
         assurance of payment. An adverse material change in Customer's
         creditworthiness shall include, but not be limited to: (i) Customer's
         material default of its obligations to WorldCom under this or any other
         agreement with WorldCom; (ii) failure of Customer to make full payment
         of all undisputed charges due hereunder on or before the Due Date (or
         disputed charges on or before the Alternate Due Date) on three (3) or
         more occasions during any period of twelve (12) or fewer months or
         Customer's failure to make such payment on or before the Due Date (or
         the Alternate Due Date, if applicable) in any two (2) consecutive
         months; (iii) acquisition of Customer (whether in whole or by majority
         or controlling interest) by an entity which is insolvent, which is
         subject to bankruptcy or insolvency proceedings, which owes past due
         amounts to WorldCom or any entity affiliated with WorldCom or which is
         a materially greater credit risk than Customer; or, (iv) Customer's
         being subject to or having filed for bankruptcy or insolvency
         proceedings or the legal insolvency of Customer.

7.       REMEDIES FOR BREACH.

         (A) SUSPENSION OF SERVICE In the event all undisputed charges due
         pursuant to WorldCom's invoice are not paid in full by the Due Date or
         disputed charges owed by Customer, if any, are not paid in full by the
         Alternate Due Date, WorldCom shall have the right, after giving
         Customer at least ten (10) days prior notice and opportunity to pay
         such charges within such 10-day period, to suspend all or any portion
         of the Switched Services to Customer ("Suspension Notice") until such
         time (designated by WorldCom in its Suspension Notice) as Customer has
         paid in full ALL undisputed charges then due to WorldCom, including any
         late fees. Following such payment, WorldCom shall reinstitute Switched
         Services to Customer ONLY when Customer provides WorldCom with
         satisfactory assurance of Customer's ability to pay for such Switched
         Services (i.e., a deposit, letter of credit or other means acceptable
         to WorldCom) and Customer's advance payment of the cost of
         reinstituting such Switched Services. If Customer fails to make the
         required payment by the date set forth in the Suspension Notice,
         Customer will be deemed to have canceled the Services suspended
         effective as of the date of suspension which cancellation shall not
         relieve Customer for payment of applicable cancellation charges as
         described in Section 2.

         (B) DISCONNECTION OF SERVICE In the event Customer is in material
         breach of this Agreement, including without limitation, failure to pay
         all undisputed charges due hereunder by the date stated in the
         Suspension Notice described in Subsection 7(A) above, WorldCom shall
         have the right, after giving Customer at least five (5) days prior
         written notice and opportunity to cure (which notice may be given
         instead of or in conjunction with the Suspension Notice described in
         Subsection 7(A) above), and in addition to foreclosing any security
         interest WorldCom may have, to (i) disconnect all or any portion the
         Switched Services being provided hereunder and/or terminate this
         Agreement; (ii) withhold billing information from Customer;

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         and/or (iii) contact the End Users (for whom calls are originated and
         terminated solely over facilities comprising the WorldCom network)
         directly and bill such End Users directly until such time as WorldCom
         has been paid in full for the amount owed by Customer. If Customer
         fails to make payment by the date stated in the Suspension Notice and
         WorldCom, after giving Customer five (5) days prior written notice,
         terminates this Agreement as provided in this Section 7, such
         termination shall not relieve Customer for payment of applicable
         cancellation charges as described in Section 2 above.

8. WARRANTY. WorldCom will use reasonable efforts under the circumstances to
maintain its overall network quality. The quality of Switched Services provided
hereunder shall be consistent with telecommunications common carrier industry
standards, government regulations and sound business practices. WORLDCOM MAKES
NO OTHER WARRANTIES ABOUT THE SWITCHED SERVICES PROVIDED HEREUNDER, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY WARRANTY OF MERCHANTABILlTY OR
FITNESS FOR A PARTICULAR PURPOSE OR USE.

9.       LIABILITY; GENERAL INDEMNITY; REIMBURSEMENT.

         (A) LIMITED LIABILITY IN NO EVENT WILL EITHER PARTY HERETO BE LIABLE TO
         THE OTHER PARTY FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
         LOSSES OR DAMAGES, INCLUDING WITHOUT LIMITATION, LOSS OF REVENUE, LOSS
         OF CUSTOMERS OR CLIENTS, LOSS OF GOODWILL OR LOSS OF PROFITS ARISING IN
         ANY MANNER FROM THIS AGREEMENT AND THE PERFORMANCE OR NONPERFORMANCE OF
         OBLIGATIONS HEREUNDER.

         (B) GENERAL INDEMNITY In the event parties other than Customer (e.g.,
         Customer's End Users) shall have use of the Switched Services through
         Customer, then Customer agrees to forever indemnify and hold WorldCom,
         its affiliated companies and any third-party provider or operator of
         facilities employed in provision of the Switched Services harmless from
         and against any and all claims, demands, suits, actions, losses,
         damages, assessments or payments which those parties may assert arising
         out of or relating to any defect in the Switched Services.

         (C) REIMBURSEMENT Customer agrees to reimburse WorldCom for all
         reasonable costs and expenses incurred by WorldCom due to WorldCom's
         direct participation (either as a party or witness) in any
         administrative, regulatory or criminal proceeding concerning Customer
         if WorldCom's involvement in said proceeding is based solely on
         WorldCom's provision of Switched Services to Customer.

10. FORCE MAJEURE. If WorldCom's performance of this Agreement or any obligation
hereunder is prevented, restricted or interfered with by causes beyond its
reasonable control including, but not limited to, acts of God, fire, explosion,
vandalism, cable cut, storm or other similar occurrence, any law, order,
regulation, direction, action or request of the United States government, or
state or local governments, or of any department, agency, commission, court,
bureau, corporation or other instrumentality of any one or more such
governments, or of any civil or military authority, or by national emergency,
insurrection, riot, war, strike, lockout or work stoppage or other labor
difficulties, or supplier failure, shortage, breach or delay, then WorldCom
shall be excused from such performance on a day-to-day basis to the extent of
such restriction or interference. WorldCom shall use reasonable efforts under
the circumstances to avoid or remove such causes or nonperformance and shall
proceed to perform with reasonable dispatch whenever such causes are removed or
cease.

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11. STATE CERTIFICATION. Customer warrants that in all jurisdictions in which it
provides long distance services that require certification, it has obtained the
necessary certification from the appropriate governmental authority and, if
required by WorldCom, agrees to provide proof of such certification acceptable
to WorldCom. In the event Customer is prohibited, either on a temporary or
permanent basis, from continuing to conduct its telecommunications operations in
a given state, Customer shall (i) immediately notify WorldCom by facsimile, and
(ii) send written notice to WorldCom within twenty-four (24) hours of such
prohibition.

12. INTERSTATE/INTRASTATE SERVICE. Except with respect to Services specifically
designated as intrastate Services or international Services, the rates provided
to Customer in the Service Schedule are applicable only to switched Services if
such Switched Services are used for carrying interstate telecommunications
(i.e., Switched Services subject to FCC jurisdiction). WorldCom shall not be
obligated to provide Switched Services with end points within a single state or
Switched Services which originate/terminate at points both of which are situated
within a single state. In those states where WorldCom is authorized to provide
intrastate service (i.e., telecommunications transmission services subject to
the jurisdiction of state regulatory authorities), WorldCom will, at its option,
provide intrastate Switched Services pursuant to applicable state laws,
regulations and applicable tariff, if any, filed by WorldCom with-state
regulatory authorities as required by applicable law.

13. AUTHORIZED USE OF WORLDCOM NAME; PRESS RELEASES. Without WorldCom's prior
written consent, Customer shall not (i) refer to itself as an authorized
representative of WorldCom whenever it refers to the Switched Services in
promotional, advertising or other materials, or (ii) use WorldCom's logos, trade
marks, service marks, or any variations thereof in any of its promotional,
advertising or other materials. Additionally, Customer shall provide to WorldCom
for its prior review and written approval, all promotions, advertising or other
materials or activity using or displaying WorldCom's name or the Services to be
provided by WorldCom. Customer agrees to change or correct, at Customer's
expense, any such material or activity which WorldCom, in its sole judgment,
determines to be inaccurate, misleading or otherwise objectionable. Customer is
explicitly authorized to only use the following statements in its sales
literature or if in response to an inquiry by Customer's end user: (i) "Customer
utilizes the WorldCom network", (ii) "Customer utilizes WorldCom's facilities",
(iii) "WorldCom provides only the network facilities", and (iv) "WorldCom is our
network services provider". Except as specifically provided in this Section 13,
the parties further agree that any press release, advertisement or publication
generated by a party regarding this Agreement, the Services provided hereunder
or in which a party desires to mention the name of the other party or the other
party's parent or affiliated company(ies), will be submitted to the
non-publishing party for its written approval prior to publication.

14. NOTICES. Notices under this Agreement shall be in writing and delivered to
the person identified below at the offices of the parties as they appear below
or as otherwise provided for by proper notice hereunder. Customer shall notify
WorldCom in writing if Customer's billing address is different than the address
shown below. The effective date for any notice under this Agreement shall be the
date of actual receipt of such notice by the appropriate party, notwithstanding
the date of mailing or transmittal via hand delivery or facsimile.

         IF TO WORLDCOM:                    WorldCom Network Services, Inc.
                                            One Williams Center
                                            Tulsa, Oklahoma 74172
                                            Attn: Carrier Sales Dept.

         IF TO CUSTOMER:                    Logix Communications Corporation
                                            13439 North Broadway Extension

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                                            Oklahoma City, Oklahoma 73114
                                            Attn: Stephen T. Dobson
                                                  ----------------------------
                                            Telephone No.: 405-391-8500
                                                           -------------------
                                            Fax No.: 405-391-8515
                                                     -------------------------

15. NO-WAIVER. No term or provision of this Agreement shall be deemed waived and
no breach or default shall be deemed excused unless such waiver or consent shall
be in writing and signed by the party claimed to have waived or consented. A
consent to waiver of or excuse for a breach or default by either party, whether
express or implied, shall not constitute a consent to, waiver of, or excuse for
any different or subsequent breach or default.

16.      PARTIAL INVALIDITY; GOVERNMENT ACTION.

         (A) PARTIAL INVALIDITY If any part of any provision of this Agreement
         or any other agreement, document or writing given pursuant to or in
         connection with this Agreement shall be invalid or unenforceable under
         applicable law, rule or regulation, that part shall be ineffective to
         the extent of such invalidity only, without in any way affecting the
         remaining parts of that provision or the remaining provisions of this
         Agreement. In such event, Customer and WorldCom will negotiate in good
         faith with respect to any such invalid or unenforceable part to the
         extent necessary to render such part valid and enforceable.

         (B) GOVERNMENT ACTION Upon thirty (30) days prior notice, either party
         shall have the right, without liability to the other, to cancel an
         affected portion of the Switched Service if any material rate or term
         contained herein and relevant to the affected Switched Service is
         substantially changed (to the detriment of the terminating party) or
         found to be unlawful or the relationship between the parties hereunder
         is found to be unlawful by order of the highest court of competent
         jurisdiction to which the matter is appealed, the FCC, or other local,
         state or federal government authority of competent jurisdiction.

17. EXCLUSIVE REMEDIES. Except as otherwise specifically provided for herein,
the remedies set forth in this Agreement comprise the exclusive remedies
available to either party at law or in equity.

18. USE OF SERVICE. Upon WorldCom's acceptance of a Service Request hereunder,
WorldCom will provide the Switched Services specified therein to Customer upon
condition that such Switched Services shall not be used for any unlawful
purpose. The provision of Switched Services will not create a partnership or
joint venture between the parties or result in a joint communications service
offering to any third parties, and WorldCom and Customer agree that this
Agreement, to the extent it is subject to FCC regulation, is an inter-carrier
agreement which is not subject to the filing requirements of Section 211(a) of
the Communications Act of 1934 (47 U.S.C. Section 211(a)) as implemented in 47
C.F.R. Section 43.51.

19.      CHOICE OF LAW; FORUM.

         (A) LAW This Agreement shall be construed under the laws of the State
         of Oklahoma without regard to choice of law principles.

         (B) FORUM Any legal action or proceeding with respect to this Agreement
         may be brought in the Courts of the State of Oklahoma in and for the
         County of Tulsa or the United States of America for the Northern
         District of Oklahoma. By execution of this Agreement, both Customer and
         WorldCom hereby submit to such jurisdiction, hereby expressly waiving

                                  Page 9 of 12
                                  CONFIDENTIAL
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         whatever rights may correspond to either of them by reason of their
         present or future domicile. In furtherance of the foregoing, Customer
         and WorldCom hereby agree to service by U.S. Mail at the notice
         addresses referenced in Section 14. Such service shall be deemed
         effective upon the earlier of actual receipt or seven (7) days
         following the date of posting.

20.      PROPRIETARY INFORMATION.

         (A) CONFIDENTIAL INFORMATION The parties understand and agree that the
         terms and conditions of this Agreement (but not the existence thereof),
         all documents referenced herein (including invoices to Customer for
         Switched Services provided hereunder), communications between the
         parties regarding this Agreement or the Switched Services to be
         provided hereunder (including price quotes to Customer for any services
         proposed to be provided or actually provided hereunder), as well as
         such information relevant to any other agreement between the parties
         (collectively "CONFIDENTIAL INFORMATION"), are confidential as between
         Customer and WorldCom.

         (B) LIMITED DISCLOSURE A party shall not disclose Confidential
         Information (unless subject to discovery or disclosure pursuant to
         legal process), to any other party other than the directors, officers,
         and employees of a party or a party's agents including their respective
         attorneys, consultants, brokers, lenders, insurance carriers or bona
         fide prospective purchasers who have specifically agreed in writing to
         nondisclosure of the terms and conditions hereof. Any disclosure hereof
         required by legal process shall only be made after providing the
         non-disclosing party with notice thereof in order to permit the
         non-disclosing party to seek an appropriate protective order or
         exemption. Violation by a party or its agents of the foregoing
         provisions shall entitle the non-disclosing party, at its option, to
         obtain injunctive relief without a showing of irreparable harm or
         injury and without bond.

         (C) SURVIVAL OF CONFIDENTIALITY The provisions of this Section 20 will
         be effective as of the date of this Agreement and remain in full force
         and effect for a period which will be the longer of (i) one (1) year
         following the date of this Agreement, or (ii) one (1) year from the
         termination of all Services hereunder.

21. SUCCESSORS AND ASSIGNMENT. This Agreement shall be binding upon and inure to
the benefit of the parties hereto and their respective successors or assigns,
provided, however, that Customer shall not assign or transfer its rights or
obligations under this Agreement without the prior written consent of WorldCom,
which consent shall not be unreasonably withheld or delayed, and further
provided that any assignment or transfer without such consent shall be void.

22.      GENERAL.

         (A) SURVIVAL OF TERMS The terms and provisions contained in this
         Agreement that by their sense and context are intended to survive the
         performance thereof by the parties hereto shall so survive the
         completion of performance and termination of this Agreement, including,
         without limitation, provisions for indemnification and the making of
         any and all payments due hereunder.

         (B) HEADINGS Descriptive headings in this Agreement are for convenience
         only and shall not affect the construction of this Agreement.

                                  Page 10 of 12
                                  CONFIDENTIAL
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         (C) INDUSTRY TERMS Words having well-known technical or trade meanings
         shall be so construed, and all listings of items shall not be taken to
         be exclusive, but shall include other items, whether similar or
         dissimilar to those listed, as the context reasonably requires.

         (D) RULE OF CONSTRUCTION No rule of construction requiring
         interpretation against the drafting party hereof shall apply in the
         interpretation of this Agreement

23. ENTIRE AGREEMENT. This Agreement consists of (i) all the terms and
conditions contained herein, and (ii) all documents incorporated herein
specifically by reference. This TSA constitutes the complete and exclusive
statement of the understandings between the parties and supersedes all proposals
and prior agreements (oral or written) between the parties relating to the
Switched Services provided hereunder. No subsequent agreement between the
parties concerning the Switched Services shall be effective or binding unless it
is made in writing and subscribed to by Customer and WorldCom.

24. OTHER AGREEMENTS. Customer acknowledges and agrees that this Agreement and
the Switched Services described herein may not be combined with any other
switched services products or services offered by WorldCom, WorldCom's parent
company or WorldCom's affiliates. Additionally, Customer acknowledges and agrees
that:

         (A) CURRENT SERVICES As of the Effective Date of this Agreement, (i)
         all switched telecommunications services ("CURRENT SERVICES") offered
         by WorldCom (formerly WilTel, Inc.), WorldCom's parent company,
         WorldCom, Inc. (formerly LDDS Communications, Inc.) or any of
         WorldCom's affiliates, including without limitation, IDB WorldCom
         Services, Inc. (hereinafter referred to as the "WORLDCOM GROUP"), which
         are currently being provided Customer (which for purposes of this
         Section 24 will include Customer's parent company, Customer's
         subsidiaries and any other entities under common control with Customer;
         hereinafter referred to as the "CUSTOMER GROUP") pursuant to existing
         service agreements ("EXISTING AGREEMENTS") will be canceled and no
         longer in force or effect except for charges or credits due for Current
         Services rendered as of the Effective Date of this Agreement and
         provisions intended to survive termination, such as limitation of
         liability, indemnification and confidentiality, and (ii) all Current
         Services provided a member of the Customer Group by a member of the
         WorldCom Group will be provisioned under the terms and conditions of
         this TSA. Simultaneous with the execution of this Agreement, if
         applicable, Customer shall cause all members of the Customer Group to
         agree to the cancellation of such Existing Agreements and the provision
         of Current Services under the terms and conditions of this Agreement
         and Customer agrees to provide WorldCom with reasonable documentation
         evidencing such agreement.

         (B) THIRD PARTY AGREEMENTS If Customer acquires or merges or combines
         with a third party after the Effective Date of this Agreement, and such
         third party has existing agreement(s) with a member of the WorldCom
         Group (collectively referred to as the "THIRD PARTY AGREEMENTS") for
         the provision of switched telecommunications services ("THIRD PARTY
         EXISTING SERVICES"), then ninety (90) days following the date of such
         acquisition, merger or combination (or such earlier date contained in a
         written notice from Customer to WorldCom) (the "TRANSFER DATE"), (i)
         the Third Party Agreements will be canceled and no longer in force or
         effect except for commitments, if any, contained in such Third Party
         Agreements and charges and credits due for Services rendered prior to
         the Transfer Date, (ii) Third Party Existing Services will be
         provisioned under this Agreement, and (iii) the aggregate commitment(s)
         (e.g., revenue, volume, minute, etc.) remaining under such Third Party
         Agreements, if any, shall be added on

                                  Page 11 of 12
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         a pro rata basis to the commitment(s), if any, existing under this
         Agreement. Simultaneous with the closing of such acquisition,
         combination or merger, Customer will cause such third party and all of
         its affiliates who are parties to such Third Party Agreements, to agree
         to the cancellation of such Third Party Agreements and the provision of
         Third Party Existing Services under the terms and conditions of this
         Agreement and Customer agrees to provide WorldCom with reasonable
         documentation evidencing such agreement. In the event any Third Party
         Agreement(s) have a provision similar to the provision contained
         herein, the parties agree to negotiate in good faith concerning which
         agreement (i.e., this Agreement or any Third Party Agreement) shall
         survive and which agreement(s) shall be terminated.

                  Example: Assume (i) Customer's Commitment is $500,000, (ii)
                  there are twenty-four (24) months remaining in the Service
                  Term of this Agreement, and (iii) Customer acquires a third
                  party who has an existing switched telecommunications services
                  agreement with a member of the WorldCom Group which contains a
                  minimum monthly revenue commitment of $250,000 and has ten
                  (10) months remaining in the term of such agreement.
                  Customer's "new" Commitment will be $604,166 for the remaining
                  twenty-four (24) months in the Service Term ($500,000 +
                  [($250,000 x 10)/24]).

         IN WITNESS WHEREOF, the parties have executed this Telecommunications
Services Agreement as of the dates set forth below which Agreement will be
effective as described in the PET attached hereto.

WORLDCOM NETWORK SERVICES, INC.                    LOGIX COMMUNICATIONS
                                                   CORPORATION

By:     Jim Foran                                  By:   William Hoffman
   -------------------------                          -------------------------
         (Signature)                                        (Signature)

        Jim Foran                                        William Hoffman
----------------------------                       ----------------------------
           (Print Name)                                       (Print Name)

    Regional Sales Director                              Vice President
----------------------------                       ----------------------------
                (Title)                                            (Title)

     June 23, 1998                                     June 12,1998
----------------------------                       ----------------------------
               (Date)                                             (Date)

                                  Page 12 of 12
                                  CONFIDENTIAL
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                                                    EFFECTIVE DATE: JUN 25 1998
                                                                   -------------

                         WORLDCOM NETWORK SERVICES, INC.

                      CLASSIC/TRANSCEND-TM- SWITCHED SERVICES

                            PROGRAM ENROLLMENT TERMS

         These PROGRAM ENROLLMENT TERMS (the "PET") are made by and between
WorldCom Network Services, Inc. ("WORLDCOM") and Logix Communications
Corporation ("CUSTOMER") and are a part of their Telecommunications Services
Agreement for Switched Services. Capitalized terms not defined herein shall have
the meaning ascribed to them in the TSA, the Service Schedule or the applicable
Rate and Discount Schedule.

1.       SERVICE TERM:

         (A) The Service Term shall commence as of the Effective Date (as
         described below) and shall continue for a period of thirty-six (36)
         months (the "SERVICE TERM"). Upon expiration of the Service Term, the
         Switched Services in question will continue to be provided pursuant to
         the same terms and conditions as are then in effect (including without
         limitation, the applicable rates, discounts and commitments, if any),
         subject to termination by either party upon thirty (30) days prior
         written notice to the other party. WorldCom will not be obligated to
         accept any Service Request under this Agreement if Customer's initial
         Service Request is (i) not submitted by Customer within thirty (30)
         days of the Effective Date of this Agreement, and (ii) not subject to a
         Requested Service Date within ninety (90) days of the Effective Date.

         (B) For purposes of this Agreement, the appropriate Effective Date as
         determined below will be filled in by WorldCom where provided above. If
         Customer has an existing switched services agreement with a member of
         the WorldCom Group (as defined in Subsection 24(A) of the TSA), the
         "EFFECTIVE DATE" will be the 1st day of the month following the later
         of (i) twenty-one (21) days after this Agreement has been fully
         executed by both parties, or (ii) Customer has received a satisfactory
         credit review and approval from WorldCom's Credit Department pursuant
         to Subsection 6(A) of the TSA, and all security documentation, if any,
         required by WorldCom has been properly executed and delivered to
         WorldCom (collectively, the "CREDIT REVIEW"). If Customer does not have
         an existing switched services agreement with a member of the WorldCom
         Group, the "EFFECTIVE DATE" will be the date this Agreement has been
         fully executed by both parties and the Credit Review has been
         completed.

         (C) At any time during the Service Term, WorldCom agrees that Customer
         may elect to transition such Services being provided hereunder to other
         products and services then being offered, provided, Customer's
         commitments (whether revenue, minute or otherwise), if any, are
         transferred and applied in full under any new products or services.

2.       CUSTOMER'S MINIMUM REVENUE COMMITMENT:

         (A) Commencing with the first day of the seventh (7th) billing period
         following the Effective Date (as determined under Section 1 above) and
         continuing through the end of the Service Term (including any
         extensions thereto) (the "COMMITMENT PERIOD"), Customer agrees to

                                  Page 1 of 4
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         maintain, on a take-or-pay basis, Monthly Revenue (as defined in the
         applicable Rate and Discount Schedule) of at least $500,000
         ("CUSTOMER'S MINIMUM REVENUE COMMITMENT").

         (B) Notwithstanding anything to the contrary contained in this
         Agreement, as soon as Customer's cumulative Monthly Revenue from
         WorldCom under the terms of this Agreement are equal to at least
         $36,000,000 ("CUSTOMERS TOTAL COMMITMENT"), Customer may elect to
         terminate Customer's Minimum Revenue Commitment described in Subsection
         2(A) above by providing WorldCom written notice ("CUSTOMER NOTICE"). In
         such event, commencing with the first day of the first full month
         following at least thirty (30) days after WorldCom receives the
         Customer Notice, Customer's Minimum Revenue Commitment shall terminate
         and will no longer be in force or effect. Provided, the applicable
         Discounts set forth in the Rate and Discount Schedule will continue to
         be applicable through the remainder of the Service Term.

         (C) In the event Customer sells all or substantially all of its end
         users whose traffic is maintained on the WorldCom network and the
         purchasing entity does not fully assume Customer's Minimum Revenue
         Commitment, WorldCom agrees to negotiate in good faith with Customer
         concerning the extension of the Service Term and/or reduction in
         Customer's Minimum Revenue Commitment, if necessary. It is the express
         intent of the parties that in such event WorldCom will receive the
         entire value of Customer's Total Commitment when considered on a
         present value basis.

3.       DEFICIENCY CHARGE: In the event Customer does not maintain Customer's
         Minimum Revenue Commitment in any month during the Commitment Period
         (regardless of whether Customer has commenced using any or all of the
         Switched Services described herein), then for those month(s) only,
         Customer will pay WorldCom the difference between Customer's Minimum
         Revenue Commitment and Customer's actual Monthly Revenue (as described
         in the applicable Rate and Discount Schedule) (the "DEFICIENCY
         CHARGE"). The Deficiency Charge will be due at the same time payment is
         due for Service provided to Customer, or immediately in an amount equal
         to Customer's Minimum Revenue Commitment for the unexpired portion of
         the Service Term, if WorldCom terminates this Agreement based on
         Customer's default.

4.       REQUIREMENTS: In consideration of the rates and discounts set forth in
         this Agreement and other good and valuable consideration, the receipt
         and sufficiency of which are hereby acknowledged, commencing with the
         Effective Date of this Agreement and continuing until Customer's actual
         cumulative Monthly Revenue is equal to Customer's Total Commitment,
         Customer agrees to purchase at least eighty percent (80%) of its
         telecommunications services requirements (which services are described
         in this Agreement) from WorldCom under the terms and conditions set
         forth in this Agreement ("CUSTOMER'S REQUIREMENTS OBLIGATION"). Upon
         request from WorldCom, Customer agrees to provide WorldCom reasonable
         documentation evidencing Customer's compliance with this Section 4.
         Notwithstanding anything to the contrary contained in this Section 4,
         Customer's Requirements Obligation will not apply with respect to those
         services which are (i) provisioned and maintained on Customer's own
         network, (ii) required to be purchased from third parties in order to
         satisfy requirements under agreements with third parties in effect as
         of the Effective Date of this Agreement (but only as long as such
         requirements are in effect), or (iii) Intrastate TERMINATION Services
         solely within the State of Texas.

5.       SPECIAL RATES. Notwithstanding anything to the contrary contained in
         the Rate and Discount Schedule attached hereto, commencing with the
         Effective Date and continuing through the end of the Service Term,
         Customer will receive the special rates (the "SPECIAL RATES") shown in
         Subparts (i) through (iii) below. The Special Rates will be subject to
         the discount

                                  Page 2 of 4
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         percentage, if applicable, set forth in the Rate and Discount Schedule.
         All other rates will be as set forth in the Rate and Discount Schedule.

                  (i) TERMINATION Service - Customer's Interstate rate for calls
                  within the 48 contiguous United States (excluding calls
                  terminating to a SUPERSAVER LATA) will be $0.0480.

                  (ii) TERMINATION Service - Customer's Interstate rate for
                  calls within the 48 contiguous United States terminating to a
                  SUPERSAVER LATA will be $0.0410.

                  (iii) TOLL FREE ORIGINATION Service - Customer's Interstate
                  rate for calls within the 48 contiguous United States
                  originating from a SUPERSAVER LATA will be $0.0485.

                  (iv) SWITCHED ACCESS Service - Customer's Intrastate rate for
                  1+ calls within the State of Texas will be $0.1175.

                  (v) DEDICATED ACCESS Service - Customer's Off-Peak rate for
                  calls from the 48 contiguous United States to Mexico (i) for
                  Bands 1, 2 and 3 will be $0.1800, and (ii) for Bands 4, 5, 6,
                  7 and 8 will be $0.2800.

6.       RATE STABILITY/RIGHT OF FIRST REFUSAL.

         (A) In consideration of Customer's Requirements Obligation and other
         good and valuable consideration, the receipt and sufficiency of which
         are hereby acknowledged, notwithstanding anything to the contrary
         contained in Subsection 5(C) of the TSA, commencing with the Effective
         Date and continuing for a period of twelve (12) months thereafter,
         WorldCom agrees to not modify Customer's charges set forth in the Rate
         and Discount Schedule as modified by Section 5 of this PET.

         (B) Commencing with the thirteenth (13th) month following the Effective
         Date, in the event Customer receives a bona fide offer (the "OFFER")
         from AT&T Communications, Inc. or Sprint Communications Company ("THIRD
         PARTY") to provide Services similar to the services provided hereunder
         at rates which are at least seven percent (7%) lower than the rates
         then being offered by WorldCom hereunder, Customer agrees to notify
         WorldCom in writing of such Offer specifying the type of Service and
         rate being offered by such Third Party (the "NOTICE"). WorldCom will
         have ten (10) business days from receipt of such Notice to notify
         Customer of its election to offer such Service(s) at the rate(s)
         contained in the Offer. In the event WorldCom elects not to offer such
         Services at the rates contained in the Offer (or fails to respond to
         the Offer within such ten-day period), Customer may purchase such
         Services from the Third Party and the provisions of Section 4 shall not
         apply. During the Service Term and for a period of six (6) months
         thereafter, upon WilTel's request, Customer agrees to provide WilTel
         with reasonable documentation to substantiate the charges paid to such
         Third Party for Services as described in this Section 6.

7.       TOLL FREE NUMBERS. Notwithstanding anything to the contrary contained
         in Section 9 of the Service Schedule, Customer's Monthly Recurring
         Charge for every set of three (3) features will be $25.00.

                                  Page 3 of 4
                                  CONFIDENTIAL
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         IN WITNESS WHEREOF, the parties have executed these
Classic/TRANSCEND-TM- Switched Services Program Enrollment Terms.

WORLDCOM NETWORK SERVICES, INC.                 LOGIX COMMUNICATIONS
                                                CORPORATION

By:    Jim Foran                                By:  William Hoffman
   ---------------------------                    ----------------------------
            (Signature)                                     (Signature)

       Jim Foran                                     William Hoffman
------------------------------                  ------------------------------
            (Print Name)                                    (Print Name)

       Regional Sales Director                       Vice President
------------------------------                  ------------------------------
              (Title)                                         (Title)

                                  Page 4 of 4
                                  CONFIDENTIAL
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                         WORLDCOM NETWORK SERVICES, INC.

                     CLASSIC/TRANSCEND-TM- SWITCHED SERVICES

                                SERVICE SCHEDULE

         This Service Schedule is made by and between WorldCom Network Services,
Inc. ("WORLDCOM") and Logix Communications Corporation ("CUSTOMER") and is a
part of their Telecommunication Services Agreement for Switched Services.
Neither Customer nor WorldCom shall be obligated with respect to the Switched
Services described below, nor any other condition of such Switched Services
until Customer has submitted and WorldCom has accepted a Service Request with
respect to the particular Switched Service. Capitalized terms not defined herein
shall have the meaning ascribed to them in the TSA, the PET or the applicable
Rate and Discount Schedule.

1. SWITCHED SERVICES: During the Service Term of the Agreement, WorldCom will
provide the following Switched Services (all as more particularly described
herein), (i) to and from the locations below, and (ii) for the charges and
applicable discounts set forth in the applicable Rate and Discount Schedule
attached herewith:

         (a)      "TERMINATION Service" which is WorldCom's termination of calls
                  received from Customer's Service Interconnection(s).

         (b)      "TOLL FREE ORIGINATION Service" which is the origination of
                  Toll Free calls by WorldCom and the termination of such calls
                  to Customer's Service Interconnection(s).

         (c)      "SWITCHED ACCESS Service" which is the origination (via
                  individual telephone access lines) and termination of calls
                  solely over facilities comprising the WorldCom network.

         (d)      "DEDICATED ACCESS Service" which is the origination and
                  termination of calls solely over facilities comprising the
                  WorldCom network which origination or termination is via
                  dedicated access lines.

         (e)      "TRAVEL CARD Service" which is the origination (via Travel
                  Card Toll Free number access) and termination of calls solely
                  over facilities comprising the WorldCom network.

2.       SERVICE INTERCONNECTIONS:

         (a) In order to utilize (i) TERMINATION Service and TOLL FREE
         ORIGINATION Service, one or more full time dedicated connections
         between Customer's network and the WorldCom network at one or more
         WorldCom designated locations ("WORLDCOM POP") must be established
         ("CARRIER SERVICE INTERCONNECTIONS"), and (ii) DEDICATED ACCESS
         Service, one or more full time dedicated connections between an End
         User's private branch exchange ("PBX") or other customer premise
         equipment and the WorldCom network at one or more WorldCom POP(s) must
         be established ("DEDICATED SERVICE INTERCONNECTIONS"). Each Carrier
         Service Interconnection and Dedicated Service

                                   Page 1 of 8
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         Interconnection shall be comprised of one or more dedicated access
         circuits, as the case may be. Carrier Service Interconnections and
         Dedicated Service Interconnections are collectively referred to as
         "SERVICE INTERCONNECTIONS".

         (b) The circuit(s) comprising each Service Interconnection to a
         WorldCom POP shall be requested by Customer on the appropriate WorldCom
         Service Request. Each Service Request will describe (among other
         things) the WorldCom POP to which a Service Interconnection is to be
         established, the Requested Service Date therefor, the type and quantity
         of circuits comprising the Service Interconnection and any charges and
         other information relevant thereto, such as, Customer's terminating or
         originating switch location, as the case may be. Such additional
         information may be obtained from Customer or gathered by WorldCom and
         recorded in Technical Information Sheets provided by WorldCom.

         (c) Once ordered, and unless otherwise provided for in this TSA,
         Service Interconnections or the circuits comprising each Service
         Interconnection may only be canceled by Customer upon not less than
         thirty (30) days prior written notice to WorldCom.

         (d) With respect to a Carrier Service Interconnection, absent the
         automatic number identification ("ANI") of the calling party, Customer
         shall provide WorldCom with a written certification (the
         "CERTIFICATION") of the percentage of interstate (including
         international) and intrastate minutes of use relevant to the minutes of
         traffic to be terminated in the same state in which the WorldCom POP is
         located to which the Carrier Service Interconnection is made. This
         Certification shall be provided by Customer prior to Start of Service
         for any Carrier Service Interconnection and may be modified from time
         to time by Customer and subject to recertification upon the request of
         WorldCom which requests shall not be made unilaterally by WorldCom more
         than once each calendar quarter. Any such modification(s) or
         Certification(s) shall be effective as of the first day of any calendar
         month and following at least forty-five (45) days notice from Customer.
         In the event Customer fails to make such Certification, the relevant
         minutes of use will be deemed to be subject to the Intrastate Rates
         described in the applicable Rate and Discount Schedule. In the event
         WorldCom or any other third party requires an audit of WorldCom's
         interstate/intrastate minutes of traffic, Customer agrees to cooperate
         in such audit at its expense and make its call detail records, billing
         systems and other necessary information reasonably available to
         WorldCom or any third party solely for the purpose of verifying
         Customer's interstate/intrastate minutes of traffic. Customer agrees to
         indemnify WorldCom for any liability WorldCom incurs in the event
         Customer's Certification is different than that determined by the
         audit.

         (e) With respect to Carrier Service Interconnections, Customer shall be
         solely responsible for establishing and maintaining each Carrier
         Service Interconnection over facilities subject to WorldCom's approval.
         With respect to Dedicated Service Interconnections, WorldCom will
         provision and maintain local access facilities between the End User
         location (i.e., PBX) and the WorldCom POP, subject to any LEC charges
         plus other applicable terms and charges set forth in WorldCom's F.C.C.
         Tariff No. 5, however, Customer may elect to be responsible for
         establishing each Dedicated Service Interconnection over facilities
         subject to WorldCom's approval. Service Interconnections shall only be
         comprised of DS-1 facilities unless otherwise provided for in the
         Service Request and agreed to in writing by WorldCom. If a Service
         Interconnection is proposed to be made via a local exchange carrier,
         WorldCom will have the authority to direct Customer to utilize
         WorldCom's entrance facilities or local serving arrangement ("LSA")
         with the

                                   Page 2 of 8
                                  CONFIDENTIAL
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         relevant local telephone operating company, and Customer will be
         subject to a non-discriminatory charge therefor from WorldCom. The
         monthly recurring charge relevant to Customer's use of LSA capacity
         shall be subject to upward adjustment by WorldCom from time to time
         which adjustment, if any, shall not exceed the rate that otherwise
         would be charged for the equivalent switched access capacity between
         the same points by the relevant local telephone operating company
         pursuant to its published charges for the type of service in question.

         (f) If other private line interexchange facilities are necessary to
         establish a Service Interconnection, and such facilities are requested
         from WorldCom, such facilities will be provided on an individual case
         basis.

         (g) Commencing with the second full calendar month following Start of
         Service for each circuit comprising a Service Interconnection (i.e.,
         both Carrier Service Interconnections and Dedicated Service
         Interconnections) and thereafter, Customer will maintain Switched
         Services measured usage charges per DS-1 (or DS-1 equivalent circuit)
         of not less than $1,500 per calendar month/billing period ("MINIMUM
         MONTHLY USAGE"). In the event Customer fails to obtain the required
         Minimum Monthly Usage for the circuits comprising each Service
         Interconnection, WorldCom will charge and Customer will pay the
         difference between the number of DS-1s times the Minimum Monthly Usage
         (i.e., $1,500) and Customer's total Switched Services measured usage
         charges for the circuit(s) comprising the Service Interconnection in
         question ("MINIMUM USAGE CHARGE"). WorldCom TERMINATION Service and
         TOLL FREE ORIGINATION Service minutes carried over the same Service
         Interconnection, if any, shall be included in determining if Customer
         has met the Minimum Monthly Usage requirement.

                  Example: Assume Customer's actual Switched Services measured
                  usage charges for 2 DS-1s comprising a Carrier Service
                  Interconnection at WorldCom POP A is $3,500, Customer's actual
                  Switched Services measured usage charges for 2 DS-1s
                  comprising a Carrier Service Interconnection at WorldCom POP B
                  is $4,500, and Customer's End User's actual Switched Services
                  measured usage charges for 1 DS-1 comprising a Dedicated
                  Service Interconnection at WorldCom POP C is $600. Customer
                  would not be subject to a Minimum Usage Charge since
                  Customer's actual Minimum Monthly Usage is $8,600 which
                  exceeds Customer's Minimum Monthly Usage of $7,500 [5 x
                  $1,500].

         (h) DS-1 circuits comprising all Service Interconnections will be
         subject to a nonrecurring $400 per DS-1 switch port installation
         charge, and DS-3 circuits comprising all Service Interconnections will
         be subject to a nonrecurring per DS-3 switch port installation charge
         as determined on an individual case basis.

3. FORECASTS: Before Customer's initial order for Switched Services, Customer
shall provide WorldCom with a forecast regarding the number of minutes expected
to be terminated or originated in various LATAs and/or Tandems, so as to enable
WorldCom to configure optimum network arrangements. IN THE EVENT CUSTOMER'S
SWITCHED SERVICE TRAFFIC VOLUMES RESULT IN A LOWER THAN INDUSTRY STANDARD
COMPLETION RATE OR OTHERWISE ADVERSELY AFFECT THE WORLDCOM NETWORK, WORLDCOM
RESERVES THE RIGHT TO BLOCK THE SOURCE OF SUCH ADVERSE TRAFFIC AT ANY TIME.
Customer will provide WorldCom with additional forecasts from time to time upon
WorldCom's request which shall not be more frequent than once every three (3)
months.

                                   Page 3 of 8
                                  CONFIDENTIAL
<PAGE>

4. START OF SERVICE: Start of Service for the various Switched Services will
occur as described below:

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------
         SERVICE                                     START OF SERVICE
-------------------------------------------------------------------------------
<S>                                      <C>
TERMINATION Service                       Concurrently with the activation of
                                          each circuit comprising Carrier
                                          Service Interconnections relevant to
                                          TERMINATION Service
-------------------------------------------------------------------------------
TOLL FREE ORIGINATION                     Concurrently with the activation of
Service                                   each circuit comprising Carrier
                                          Service Interconnections relevant to
                                          TOLL FREE ORIGINATION Service
-------------------------------------------------------------------------------
SWITCHED ACCESS                           ANI by ANI basis concurrently with
Service                                   the activation of each ANI to be
                                          served, and a TOLL FREE Number by
                                          TOLL FREE Number basis
                                          concurrently with activation of
                                          each TOLL FREE Number
-------------------------------------------------------------------------------
DEDICATED ACCESS                          Concurrently with the activation of
Service                                   each circuit comprising Dedicated
                                          Service Interconnections
-------------------------------------------------------------------------------
TRAVEL CARD Service                       Code by Code basis concurrently with
                                          the activation of each Code
-------------------------------------------------------------------------------
</TABLE>

5.       LIMITATION OF ORIGINATION OR TERMINATION LOCATIONS:

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------
    SWITCHED SERVICE                        ORIGINATION FROM                        TERMINATION TO
------------------------------------------------------------------------------------------------------
<S>                                  <C>                                   <C>
TERMINATION Service                     Any WorldCom POP                        Any direct dialable
                                                                                location worldwide
------------------------------------------------------------------------------------------------------
TOLL FREE                               Locations in the 48                     Any Customer
ORIGINATION Service                     contiguous United                       designated Carrier
                                        States, Hawaii,                         Service
                                        Alaska, the US                          Interconnection
                                        Virgin Islands,
                                        Puerto Rico and
                                        Canada
------------------------------------------------------------------------------------------------------
SWITCHED ACCESS                         All equal access                        Any direct dialable
(1+) Service                            exchanges in the 48                     location worldwide
                                        contiguous United
                                        States (except in
                                        LATA 921-Fishers
                                        Island, New York)
                                        and Hawaii
------------------------------------------------------------------------------------------------------
SWITCHED ACCESS                         Locations in the 48                     Locations in the 48
(Toll Free) Service                     contiguous United                       contiguous United
                                        States, Hawaii,                         States and Hawaii
                                        Alaska, the US
                                        Virgin Islands,
                                        Puerto Rico
------------------------------------------------------------------------------------------------------
DEDICATED ACCESS                        Locations in the 48                     Any direct dialable
(1+) Service                            contiguous United                       location worldwide
                                        States
------------------------------------------------------------------------------------------------------
DEDICATED ACCESS                        Locations in the 48                     Any Customer
(Toll Free) Service                     contiguous United                       designated
                                        States, Hawaii,                         Dedicated Service
                                        Alaska, the US                          Interconnection
                                        Virgin Islands,
                                        Puerto Rico
------------------------------------------------------------------------------------------------------
BASIC TRAVEL CARD                       Locations in the 48                     Locations in the 48
Service                                 contiguous United                       contiguous United
                                        States                                  States, Hawaii,
                                                                                Alaska, the US
                                                                                Virgin Islands,
                                                                                Puerto Rico and
                                                                                Canada
------------------------------------------------------------------------------------------------------
BASIC TRAVEL CARD                       Locations in                            Locations in the 48
Services                                Hawaii, Alaska, the                     contiguous United
                                        US Virgin Islands,                      States
                                        Puerto Rico and
                                        Canada
------------------------------------------------------------------------------------------------------
BASIC TRAVEL CARD                       Select                                  Locations in the 48
Service                                 International                           contiguous United
                                        locations.                              States
------------------------------------------------------------------------------------------------------
TRAVEL CARD Service                     SEE Schedule 6 to                       SEE Schedule 6 to
- Enhanced Features                     the applicable Rate                     the applicable Rate
                                        and Discount                            and Discount
                                        Schedule.                               Schedule.
------------------------------------------------------------------------------------------------------
</TABLE>

6.       BILLING INCREMENTS:

         (A)      Classic Service - (i) all calls (excluding California
         IntraLATA and California intrastate calls and calls to International
         Locations, Canada and Mexico) will be billed in

                                   Page 4 of 8
                                  CONFIDENTIAL
<PAGE>

         six (6) second increments and subject to a six (6) second minimum
         charge, (ii) California IntraLATA and California intrastate calls will
         be billed in six (6) second increments and subject to an eighteen (18)
         second minimum, and (ii) calls to International Locations, Canada and
         Mexico will be billed in six (6) second increments and subject to a
         thirty (30) second minimum charge.

         (B) TRANSCEND-TM- Service - (i) all calls (excluding calls to
         International Locations, Canada and Mexico and calls from Canada) will
         be billed in six (6) second increments and subject to a six (6) second
         minimum charge, and (iii) calls to International Locations, Canada and
         Mexico and calls from Canada will be billed in six (6) second
         increments and subject to a thirty (30) second minimum charge.

         (C) All calls will be billed (i) utilizing Hardware Answer Supervision
         where available and with respect to TOLL FREE Services, commencing with
         Customer's switch wink or answer back. If Customer is found to be
         non-compliant in passing back appropriate answer supervision, i.e.,
         answer back, WorldCom reserves the right to suspend TOLL FREE Service
         or deny requests by Customer for additional Service until appropriate
         compliance is established.

7. CDR MEDIA: WorldCom will provide Call Detail Records (CDRs) for WorldCom's
Switched Services in machine readable form in one of several magnetic tape
formats (selected by Customer on Customer's Service Request) ("CDR MEDIA"). CDR
Media provided under this Section (i) monthly is provided at no charge, (ii)
weekly is subject to a recurring monthly charge of $150, and (iii) daily is
subject to the applicable non-recurring Installation Charge as described below
(plus all leased-line and equipment costs necessary to implement Daily CDR Media
which will be determined on an individual case basis depending on Customer's
specific configuration).

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------
                    TYPE               TOTAL CONTRACT                 NON-RECURRING
                                            VALUE                  INSTALLATION CHARGE
---------------------------------------------------------------------------------------
<S>                                <C>                             <C>
Daily CDR Media-                       < $1,000,000                      $1,000
Customer provided                        $1,000,000+                     $1,000
hardware and software
---------------------------------------------------------------------------------------
Daily CDR Media-PC                     < $1,000,000                      $5,000
Solution                                 $1,000,000+                     $2,500
---------------------------------------------------------------------------------------
Sub-Daily CDR Media-                   < $1,000,000                      $1,000
Customer provided                        $1,000,000+                     $1,000
hardware and software
---------------------------------------------------------------------------------------
Sub-Daily CDR Media-PC                 < $1,000,000                      $5,000
Solution                                 $1,000,000+                     $2,500
---------------------------------------------------------------------------------------
</TABLE>

8.       TOLL FREE NUMBERS:

         (a) TOLL FREE numbers will be issued to Customer (i.e., issuance
         equates to activation or reservation, whichever occurs first) on a
         random basis. Customer requests for specific numbers will be considered
         by WorldCom, and if provided, will be subject to additional charges as
         set forth below and WorldCom's then current reservation policy which
         shall also apply to any randomly selected and reserved TOLL FREE
         number. At any time preceding three (3) months from the scheduled
         expiration of the Service Term, Customer may only reserve TOLL FREE
         numbers in an amount equal to the greater of (i) 50, or (ii) fifteen
         percent (15%) of the total number of TOLL FREE numbers activated by
         WorldCom for Customer. Customer requests for TOLL FREE numbers
         inconsistent with the above stated conditions may be considered by

                                   Page 5 of 8
                                  CONFIDENTIAL
<PAGE>

         WorldCom on an individual case basis. TOLL FREE numbers reserved for
         Customer will be activated upon Customer's request, however, with
         respect to TRANSCEND-TM- Service, WorldCom may charge Customer an SMS
         Storage fee for each TOLL FREE number.

         (b) Customer Request for Specific Numbers - $25 per individual TOLL
         FREE number.

         (c) Customer specifically agrees that regardless of the method in which
         a TOLL FREE number is reserved for or otherwise assigned to Customer,
         that Customer will not seek any remedy from WorldCom under a theory of
         detrimental reliance or otherwise that such TOLL FREE number(s) are
         found not to be available for Customer's use until such TOLL FREE
         number is put in service for the benefit of Customer, and that such
         TOLL FREE number(s) shall not be sold, bartered, brokered or otherwise
         released by Customer for a fee ("TOLL FREE NUMBER TRAFFICKING"). Any
         attempt by Customer to engage in TOLL FREE Number Trafficking shall be
         grounds for reclamation by WorldCom for reassignment of the TOLL FREE
         number(s) reserved for or assigned to Customer.

9. ENHANCED TOLL FREE SERVICES: The following TOLL FREE identification services
and routing options (collectively, "ENHANCED TOLL FREE SERVICES") are available
from WorldCom:

         IDENTIFICATION SERVICES:

         i.       Dialed Number Identification Service - identification of
                  specific TOLL FREE number dialed.

         ii.      Real-Time ANI - receipt of telephone number of calling
                  party.

         TOLL FREE ROUTING OPTIONS:

         i.       Message Referral - recording (up to six (6) months) that
                  informs callers that the TOLL FREE number has been
                  disconnected or refers callers to new number.

         ii.      Call Area Selection - selection or blockage of locations from
                  which TOLL FREE numbers can be received (i.e., State, NPA,
                  LATA or NXX level).

         iii.     Call Distributor Routing - distribution of TOLL FREE traffic
                  evenly over dedicated access lines in a trunk group (e.g.,
                  ascending, descending, most idle, least idle).

         iv.      Route Completion (Overflow) - overflow of TOLL FREE dedicated
                  access traffic only to up to five (5) pre-defined alternate
                  routing groups (e.g., dedicated access, WATs access lines or
                  switched access lines).

         v.       Geographic Routing - termination of calls to a single TOLL
                  FREE number from two or more originating routing groups to
                  different locations.

                                   Page 6 of 8
                                  CONFIDENTIAL
<PAGE>

         vi.      Time-of-Day Routing - routing of calls to single TOLL FREE
                  number based on time of day (up to forty-eight (48) time slots
                  of 15-minute increments in a 24-hour period).

         vii.     Day-of-Week Routing - routing of calls to single TOLL FREE
                  number based on each day of the week.

         viii.    Day-of-Year Routing - routing of calls to single TOLL FREE
                  number based on up to fifteen (15) customer-specified
                  holidays.

         ix.      Percent Allocation Routing - routing of calls for each
                  originating routing group to two (2) or more terminating
                  locations based on customer-specified percentage.

         Customer will receive the Identification Services described above at no
         charge. The minutes of use rates for TOLL FREE Routing Options
         described above (in addition to the TOLL FREE Routing Option Feature
         Charges described below) will be the same rates for SWITCHED ACCESS
         Service (TOLL FREE) and DEDICATED ACCESS Service (TOLL FREE), whichever
         is applicable, as described in the applicable Rate and Discount
         Schedule excluding Route Completion (Overflow). If Customer selects
         Route Completion (Overflow) and Customer's traffic overflows from
         DEDICATED ACCESS Service (TOLL FREE) to SWITCHED ACCESS Service (TOLL
         FREE), Customer's minute of use rate will be the rate associated with
         SWITCHED ACCESS Service (TOLL FREE). The TOLL FREE Routing Option
         Feature Charges are as follows:

         INSTALLATION CHARGE: $50.00 PER feature; maximum of $250.00
         per TOLL FREE number,

         CHANGE ORDER CHARGE: $50.00 PER feature; maximum of $250.00
         per TOLL FREE number.

         MONTHLY RECURRING CHARGE: $25.00 PER feature; maximum of
         $150.00 per TOLL FREE number.

         EXPEDITE CHARGE: $500.00 (i.e., outside normal interval time
         of four (4) business days).

         Note: More than ten (10) points of termination for a single
         feature will be treated as two (2) features. Further, every
         additional ten (10) points of termination will be treated as
         a separate feature.

10.      RESPORG SERVICES: Responsible Organization Services (relevant
to TOLL FREE Numbers) if provided by WorldCom will be provided by
WorldCom pursuant to WorldCom's F.C.C. Tariff No. 5.

11. AUTHORIZATION CODES FOR TRAVEL CARD SERVICE: WorldCom will supply Customer
with authorization codes ("Codes") containing nine (9) or fourteen (14) digits
for use with a corresponding TOLL FREE Service number for origination and
termination of TRAVEL CARD Service calls. The Codes may be obtained by Customer
in blocks of ten (10) not to exceed a total of 1000 Codes at any one time.
WorldCom reserves the right to deny access to any Code at any time.

                                   Page 7 of 8
                                  CONFIDENTIAL
<PAGE>

12. INBOUND PORTION OF TRAVEL CARD SERVICE CALL: The inbound service portion of
a TRAVEL CARD Service call (i.e., the TOLL FREE Service) must be provided by
WorldCom.

13. ACCOUNTING CODES: For every billed telephone number (BTN) requested by
Customer, whether verified or non-verified, Customer shall pay a monthly
recurring charge of $15.

14. PAY PHONE SURCHARGE: In the event WorldCom is required to compensate
payphone service providers (PSPs) for toll-free or access code calls which
originate from payphones (including without limitation, any Order adopted by the
FCC) ("Payphone Surcharge"), WorldCom will charge and Customer agrees to pay
WorldCom the amount of the Payphone Surcharge which is required to be paid by
WorldCom.

15. RBOC TERMINATION/ORIGINATION: With respect to Classic Switched Services,
following Start of Service for TERMINATION SERVICE, TOLL FREE ORIGINATION
Service and/or DEDICATED ACCESS Service, Customer will maintain at least 80% of
the minutes of traffic (during any calendar month or pro rata portion thereof)
comprising Customer's TERMINATION Service, TOLL FREE ORIGINATION Service and
DEDICATED ACCESS Service for termination or origination in a Tandem owned and
operated by a Regional Bell Operating Company ("RBOC Terminations/Originations")
and subject to such RBOC's tariffed access charges. WorldCom shall have the
right to apply a ($.015) per minute surcharge to the number of minutes by which
Non-RBOC Terminations/Originations exceed 20% of total monthly TERMINATION
Service, TOLL FREE ORIGINATION Service and DEDICATED ACCESS Service minutes.

16. PRESUBSCRIBED INTEREXCHANGE CARRIER CHARGE (PICC): With respect to Classic
Switched Services, WorldCom Will charge Customer for any LEC-assessed
presubscribed interexchange carrier charge ("PICC Charge") which PICC Charge
will be reasonably determined by WorldCom as of a date certain each month (the
"PICC Charge Determination Date") but only if WorldCom is directly billed by the
LEC for such PICC Charge. Customer's PICC Charge will be determined as of the
PICC Charge Determination Date and will be based on the same criteria for which
WorldCom is assessed such charge by the LEC (e.g., number and type of Customer's
End Users (i.e., residential or business) as well as the type of line associated
with each such End User (i.e., single line, secondary line or multi-line). This
Section 16 will be deemed to include any other similar additional charges
assessed by a LEC after the date of this Agreement. (i.e., charges for which
WorldCom is not currently being assessed).

         IN WITNESS WHEREOF, Customer has initialed this CLASSIC/TRANSCEND-TM-
SWITCHED SERVICES Service Schedule on the date first written above.

LOGIX COMMUNICATIONS CORPORATION

Customer's Initials [ILLEGIBLE]
                   ---------

                                   Page 8 of 8
                                  CONFIDENTIAL
<PAGE>

                         WORLDCOM NETWORK SERVICES, INC.

                            CLASSIC SWITCHED SERVICES

                           RATE AND DISCOUNT SCHEDULE

         This Rate and Discount Schedule is made by and between WorldCom Network
Services, Inc. ("WorldCom") and Logix Communications Corporation ("Customer")
and is a part of their TeleCommunications Services Agreement for Switched
Services. Capitalized terms not defined herein shall have the meaning ascribed
to them in the TSA, the PET or the Service Schedule. NOTE: ANY MODIFICATIONS,
ADDITIONS OR DELETIONS FROM THIS RATE AND DISCOUNT SCHEDULE WILL NOT BE
EFFECTIVE UNLESS SPECIFICALLY SET FORTH IN THE PET.

                                    I. RATES

(A)      TERMINATION Service

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
           JURISDICTION                            RATE PER MINUTE
--------------------------------------------------------------------------------
<S>                                              <C>
INTERSTATE
- Within the 48 contiguous United                 $0.0550 Day/Nonday
  States (excluding termination to
SUPERSAVER LATAs)
- Within the 48 Contiguous                        $0.0450 Day/Nonday
  United States (termination to
  SUPERSAVER LATAs on Schedule 1
--------------------------------------------------------------------------------
INTERSTATE Extended
- 48 contiguous United States to                  $0.1108 Day/$0.0887 Nonday
  Hawaii
- 48 contiguous United States to                  $0.1120 Day/$0.0950 Nonday
  Alaska, Puerto Rico and US
  Virgin Islands
--------------------------------------------------------------------------------
INTRASTATE TRIANGLE                               SEE Schedule 2 (DEDICATED
                                                  ACCESS Service Rates)
--------------------------------------------------------------------------------
INTERNATIONAL TRIANGLE

- 48 Contiguous United States to                  SEE Schedule 5*
  International locations
  (excluding Canada and Mexico)
- 48 contiguous United States to                  SEE Schedule 3
  Canada
- 48 contiguous United States to                  SEE Schedule 3
  Mexico
--------------------------------------------------------------------------------
</TABLE>

TRIANGLE NOT SUBJECT TO DISCOUNT.
* Based on Customer's Minimum Revenue Commitment described in Section 2 of the
  PET rounded down to the nearest level.

(B)      TOLL FREE ORIGINATION Service

<TABLE>
<CAPTION>
             JURISDICTION                                             RATE PER MINUTE
----------------------------------------------------------------------------------------------
INTERSTATE
----------------------------------------------------------------------------------------------
<S>                                                          <C>
- Within the 48 contiguous United                               $0.0550 Day/Nonday
  States (excluding origination to
  SUPERSAVER LATAs)
- Within the 48 Contiguous                                      $0.0500 Day/Nonday
  United States (origination from
SUPERSAVER LATAs on Schedule 1
----------------------------------------------------------------------------------------------
INTERSTATE Extended
- Hawaii to 48 contiguous United  States                        $0.1279 Day/$0.1110 Nonday
- Alaska to 48 contiguous United  States                        $0.2457 Day/$0.2379 Nonday
- Puerto Rico to 48 contiguous  United States                   $0.1500 Day/$0.1465 Noday
- US Virgin Islands to 48 contiguous United States              $0.1899 Day/$0.1821 Noday
----------------------------------------------------------------------------------------------

                                   Page 1 of 5
                                  CONFIDENTIAL
<PAGE>

----------------------------------------------------------------------------------------------
INTRASTATE TRIANGLE                                             SEE Schedule 2 (DEDICATED
                                                                ACCESS Service Rates)
----------------------------------------------------------------------------------------------
INTERNATIONAL TRIANLGE
- Canada to 48 Contiguous United                                SEE Schedule 3 (DEDICATED
States                                                          ACCESS Service Rates)
----------------------------------------------------------------------------------------------
</TABLE>

TRIANGLE NOT SUBJECT TO DISCOUNT.

(C)      SWITCHED ACCESS Service

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------
               JURISDICTION                                       RATE PER MINUTE
----------------------------------------------------------------------------------------------
<S>                                                         <C>
INTERSTATE (1+ and TOLL FREE)
- Within the 48 contiguous United                               $0.0850 Day/Nonday
States
----------------------------------------------------------------------------------------------
INTERSTATE (1+) Extended
- 48 contiguous United States to                                $0.1470 Day/$0.1219 Nonday
  Hawaii
- 48 contiguous United States to                                $0.1470 Day/$0.1300 Nonday
  Alaska, Puerto Rico and US
Virgin Islands
- Hawaii to 48 contiguous United                                $0.1550 Day/$0.1470 Nonday
  States
- Hawaii to Alaska, Puerto Rico                                 $0.1751 Day/$0.1581 Nonday
  and US Virgin Islands
----------------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE) Extended TRIANGLE
- Hawaii to 48 contiguous United                                $0.1550 Day/$0.1470 Nonday
  States
- Alaska to 48 contiguous United                                $0.2728 Day/$0.2651 Nonday
  States
- Puerto Rico to 48 contiguous                                  $0.1830 Day/$0.1783 Nonday
  United States
- US Virgin Islands to 48                                       $0.2170 Day/$0.2093 Nonday
  contiguous United States
----------------------------------------------------------------------------------------------
INTRASTATE (1+ and TOLL FREE) TRIANGLE                          SEE Schedule 2
----------------------------------------------------------------------------------------------
INTERNATIONAL TRIANGLE
- 48 Contiguous United States to                                SEE Schedule 4*
  International locations
  (excluding Canada and Mexico)
- 48 contiguous United States to                                SEE Schedule 3
  Canada
- 48 contiguous United States to                                SEE Schedule 3
  Mexico
- Hawaii to certain International                               SEE Schedule 7
  locations
- Hawaii to Canada                                              SEE Schedule 3
- Hawaii to Mexico                                              SEE Schedule 3
  </TABLE>

TRIANGLE NOT SUBJECT TO DISCOUNT.

* Based on Customer's Minimum Revenue Commitment described in Section 2 of the
  PET rounded down to the nearest level.

(D)      DEDICATED ACCESS Service

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------
                           JURISDICTION                                             RATE PER MINUTE
----------------------------------------------------------------------------------------------
<S>                                                         <C>
INTERSTATE (1+)
- Within the 48 contiguous United                               $0.0550 Day/Nonday
  States (excluding termination to
  SUPERSAVER LATAs)
- Within the 48 contiguous United                               $0.0450 Day/Nonday
  States (termination to
  SUPERSAVER LATAs on Schedule 1
----------------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE)
- Within the 48 contiguous United                               $0.0550 Day/Nonday
  States (excluding termination
  from SUPERSAVER LATAs)
- Within the 48 contiguous United
  States (termination from                                      $0.0500 Day/Nonday
  SUPERSAVER LATAs on Schedule 1
----------------------------------------------------------------------------------------------
INTERSTATE (1+) Extended
- 48 contiguous United States to                                $0.1108 Day/$0.0887 Nonday
  Hawaii
- 48 contiguous United States to                                $0.1120 Day/$0.0950 Nonday
  Alaska, Puerto Rico and US
  Virgin Islands
----------------------------------------------------------------------------------------------

                                   Page 2 of 5
                                  CONFIDENTIAL
<PAGE>

----------------------------------------------------------------------------------------------
INTERSTATE (TOLL FREE) Extended*
- Hawaii to 48 contiguous United                                $0.1279 Day/$0.1110 Nonday
  States
- Alaska to 48 contiguous United                                $0.2457 Day/$0.2379 Nonday
  States
- Puerto Rico to 48 contiguous                                  $0.1500 Day/$0.1465 Nonday
  United States
- US Virgin Islands to 48                                       $0.1899 Day/$0.1821 Nonday
  contiguous United States
----------------------------------------------------------------------------------------------
INTRASTATE (1+ and TOLL FREE)*                                  SEE Schedule 2
----------------------------------------------------------------------------------------------
INTERNATIONAL*
- 48 contiguous United States to                                SEE Schedule 5*
  International locations
  (excluding Canada and Mexico)
- 48 contiguous United States to                                SEE Schedule 3
  Canada
- 48 contiguous United States to                                SEE Schedule 3
  Mexico
----------------------------------------------------------------------------------------------
</TABLE>

TRIANGLE NOT SUBJECT TO DISCOUNT.

* Based on Customer's Minimum Revenue Commitment described in Section 2 of the
  PET rounded down to the nearest level.

(E)      TRAVEL CARD Service

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------
                         JURISDICTION                                             RATE PER MINUTE
----------------------------------------------------------------------------------------------
BASIC INTERSTATE
<S>                                                        <C>
- Within the 48 contiguous United                               $0.1200 Day/Nonday
  States
----------------------------------------------------------------------------------------------
BASIC INTERSTATE Extended
- 48 contiguous United States to                                $0.1450 Day/Nonday
  Alaska, Hawaii, Puerto Rico and
  US Virgin Islands
- Hawaii to 48 contiguous United                                $0.1550 Day/$0.1470 Nonday
  States
- Alaska to 48 contiguous United                                $0.2728 Day/$0.2651 Nonday
  States
- Puerto Rico to 48 contiguous                                  $0.1830 Day/$0.1783 Nonday
United States
- US  Virgin Islands to 48                                      $0.2170 Day/$0.2093 Nonday
  contiguous United States
----------------------------------------------------------------------------------------------
BASIC INTRASTATE*                                               SEE Schedule 2 (SWITCHED
                                                                ACCESS Service Rates)

----------------------------------------------------------------------------------------------
BASIC INTERNATIONAL TRIANGLE
- 48 contiguous United States to                                SEE Schedule 4* (SWITCHED
  International locations                                       ACCESS Service Rates)
  (excluding Canada and Mexico)
- 48 contiguous United States to                                $0.1300 Day/Nonday
  Canada
- 48 contiguous United States to                                SEE Schedule 3 (SWITCHED
  Mexico                                                        ACCESS Service
- Canada to 48 Contiguous United                                Rates)$0.2450 Day/Nonday
  States
----------------------------------------------------------------------------------------------
ENHANCED                                                        SEE Schedule 6
----------------------------------------------------------------------------------------------
</TABLE>
TRIANGLE NOT SUBJECT TO DISCOUNT.

* Based on Customer's Minimum Revenue Commitment described in Section 2 of the
  PET rounded down to the nearest level.

(F)      Directory Assistance

         (i)      Interstate Rate Per Call [NOT SUBJECT TO DISCOUNT]:
                  $0.50.

         (ii)     Intrastate Rate Per Call [NOT SUBJECT TO DISCOUNT]: $0.60.

                                  II. DISCOUNTS

                                   Page 3 of 5
                                  CONFIDENTIAL
<PAGE>

(A) For purposes of this Agreement, Customer's "Monthly Revenue" will be
Comprised of (i) Customer's gross measured and per call Switched Service charges
(i.e., Directory Assistance and both Domestic and International) which shall
include Customer's measured usage Charges for International Toll Free Service
(ITFS) and Universal International Free Phone Number Service (UIFN) from
WorldCom (ii) the PICC Charge described in Section 16 of the Service Schedule
(if billed directly to WorldCom by the LEC) (iii) three (3) times Customer's
first $300,000 recurring monthly Private Line Interexchange Service charges
(i.e., both Domestic and International) from WorldCom, two (2) times Customer's
second $300,000 recurring monthly Private Line Interexchange Service charges
(i.e., both Domestic and International) from WorldCom, and Customer's recurring
monthly Private Line Interexchange Service charges (i.e., both Domestic and
International) from WorldCom in excess of $600,000 and (iv) Monthly Port
Charges, Monthly CIR Charges and Monthly NNI Charges, if any, as are
specifically described in an agreement for Frame Relay Services between WorldCom
and Customer. Customer's Monthly Revenue will not include any pro rata charges,
access charges, ancillary or special feature charges, such as, Authorization
codes or CDR Tapes, or any other charges other than those identified by the
relevant WorldCom invoice as monthly recurring private line interexchange
service charges or the switched service charges specifically mentioned in this
Subsection (A).

(B) Commencing with the Effective Date and continuing through the end of the
Service Term (INCLUDING any applicable extensions thereto), Customer's discount
percentage (the "Discount") will be fifteen percent (15%).

                          III. APPLICATION OF DISCOUNTS

(A) After determining Customer's applicable Discount percentage under Article II
above, the applicable percentage will be applied to Monthly Revenues comprised
of Customer's INTERSTATE (including Alaska, Hawaii, the United States Virgin
Islands and Puerto Rico unless otherwise noted herein) measured usage charges
(which includes 1+ and Toll Free usage unless otherwise noted herein).

(B) During the Service Term, accumulated credits derived from the applicable
Discount will be applied in arrears commencing with the first day of the month
following the Effective Date, that is, the Discount will be applied to
Customer's measured usage charges for the preceding month (the "Discount
Period"). The initial Discount Period shall include any partial calendar month
following Start of Service, or such other time basis as may be mutually
determined by the parties.

(C) Each Discount will result in the application of a credit obtained during the
Discount Period to the WorldCom invoice to Customer relevant to the billed
measured Switched Service for the calendar month next following the completion
of each Discount Period, PROVIDED Customer has paid undisputed charges
(including any late fees, if applicable) for that month and has not otherwise
been subject to a Suspension Notice in accordance with the TSA. Failure of
Customer to comply with the foregoing provision shall entitle WorldCom to
withhold any credit due Customer for the Discount Period in question until such
charges (including late fees) have been paid in full.

         IN WITNESS WHEREOF, Customer has initialed this CLASSIC SWITCHED
SERVICES Rate and Discount Schedule on the date first written above.

                                   Page 4 of 5
                                  CONFIDENTIAL
<PAGE>

LOGIX COMMUNICATIONS CORPORATION

Customer's Initials
                    ----------

ATTACHMENTS:

     Schedule 1     SUPERSAVER LATAs
     Schedule 2     Intrastate Rates
     Schedule 3     Canada and Mexico Rates; Canada and Mexico Rates from Hawaii
     Schedule 4     SWITCHED ACCESS Service International Rates
     Schedule 5     DEDICATED ACCESS Service International Rates
     Schedule 6     ENHANCED TRAVEL CARD Service Rates
     Schedule 7     Switched International Rates 1+ from Hawaii

                                   Page 5 of 5
                                  CONFIDENTIAL
<PAGE>

                                   Schedule 1

<TABLE>
<CAPTION>
                                WorldCom Classic
                           Interstate SuperSaver LATAs

          City                 LATA                       City                 LATA                      City                LATA

<S>                             <C>            <C>                          <C>                <C>                       <C>
         Boston                 128                   Daytona Beach             456                   Des Moines              632
        New York                132                      Orlando                458                    Davenport              634
     Atlantic Coast             220                       Miami                 460                  Cedar Rapids             635
       Mercerville              222                    Louisville               462                  South Dakota             640
         Newark                 224                      Memphis                468                      Omaha                644
      Philadelphia              228                     Nashville               470                      Idaho                652
       Pittsburgh               234                    Chattanooga              472                     Denver                656
     Washington D.C.            236                     Knoxville               474                      Utah                 660
        Baltimore               238                    Birmingham               476                     Phoenix               666
       Culpeper                 246                    Huntsville               477                     Tucson                668
        Richmond                248                      Mobile                 480                    Portland               672
        Lynchburg               250                      Biloxi                 484                     Seattle               674
         Norfolk                252                    New Orleans              490                      Reno                 720
        Cleveland               320                    Baton Rouge              492                    Las Vegas              721
        Columbus                324                     St. Louis               520                  San Fransisco            722
          Akron                 325                    Springfield              522                      Chico                724
       Evansville               330                    Kansas City              524                   Sacramento              726
      Indianapolis              336                    Little Rock              528                   Los Angeles             730
         Detroit                340                      Wichita                532                    San Diego              732
        Milwaukee               356                   Oklahoma City             536                    Monterey               736
         Chicago                358                       Tulsa                 538                    Stockton               738
       Springfield              374                      El Paso                540                 San Luis Obispo           740
        Charlotte               422                      Dallas                 552                   Connecticut             920
       Greensboro               424                     Longview                554                   Cincinnati              922
       Greenville               430                      Austin                 558                  Fayetteville             949
         Atlanta                438                      Houston                560                      Tampa                952
        Savannah                440                     Beaumont                562                   Tallahasse              953
         Albany                 444                  Corpus Christi             564                  Palm Springs             973
          Macon                 446                    San Antonio              566                    Rochester              974
       Pensacola                448                    Brownsville              568
      Jacksonville              452                    Minneapolis              628
</TABLE>

                              WorldCom PROPRIETARY

                   Not for use or disclosure outside WorldCom

                         except under written agreement
<PAGE>

                                   SCHEDULE 2

                     WORLDCOM CLASSIC INTRASTATE BASE RATES

<TABLE>
<CAPTION>
                                       Switched                      Dedicated
                                   Peak          Off-Pk          Peak        Off-Pk

<S>                              <C>             <C>           <C>           <C>
ALABAMA                           0.0749          0.0749        0.0460        0.0460
ARIZONA                           0.1171          0.1171        0.0781        0.0669
ARKANSAS                          0.1070          0.0982        0.0610        0.0610
CALIFORNIA*                       0.0500          0.0500        0.0400        0.0400
California Intra-lata*            0.0475          0.0475        0.0350        0.0350
COLORADO                          0.1354          0.1354        0.0809        0.0809
CONNECTICUT                       0.0884          0.0788        0.0605        0.0605
DELAWARE                          0.0699          0.0561        0.0525        0.0525
FLORIDA                           0.1038          0.1038        0.0622        0.0622
GEORGIA                           0.0825          0.0825        0.0555        0.0555
IDAHO                             0.1335          0.1198        0.0896        0.0735
ILLINOIS                          0.0661          0.0661        0.0500        0.0500
INDIANA                           0.0913          0.0835        0.0591        0.0591
IOWA                              0.1092          0.1018        0.0682        0.0560
KANSAS                            0.1221          0.1221        0.0730        0.0610
KENTUCKY                          0.0791          0.0791        0.0548        0.0548
LOUISIANA                         0.0745          0.0745        0.0522        0.0522
MAINE                             0.3170          0.3170        0.1273        0.1018
MARYLAND                          0.0690          0.0690        0.0499        0.0499
MASSACHUSETTS                     0.0750          0.0750        0.0609        0.0497
MICHIGAN                          0.0902          0.0902        0.0612        0.0566
MINNESOTA                         0.0958          0.0958        0.0737        0.0632
MISSISSIPPI                       0.0998          0.0998        0.0732        0.0732
MISSOURI                          0.1235          0.1073        0.0789        0.0646
MONTANA                           0.1183          0.1095        0.0737        0.0617
</TABLE>

<TABLE>
<CAPTION>
                                       Switched                    Dedicated
                                    Peak        Off-Pk          Peak        Off-Pk

<S>                             <C>           <C>           <C>           <C>
NEBRASKA                          0.1538        0.1538        0.0811        0.0811
NEVADA                            0.0727        0.0727        0.0525        0.0525
NEW HAMPSHIRE                     0.1049        0.1049        0.0637        0.0540
NEW JERSEY                        0.0732        0.0599        0.0639        0.0522
NEW MEXICO                        0.1378        0.1378        0.0972        0.0869
NEW YORK                          0.0999        0.0942        0.0715        0.0715
NORTH CAROLINA                    0.1114        0.1114        0.0784        0.0784
NORTH DAKOTA                      0.1335        0.1335        0.0716        0.0716
OHIO                              0.0979        0.0830        0.0630        0.0630
OKLAHOMA                          0.0920        0.0920        0.0630        0.0630
OREGON                            0.1036        0.0949        0.0718        0.0586
PENNSYLVANIA                      0.1083        0.0924        0.0694        0.0566
RHODE ISLAND                      0.0713        0.0713        0.0373        0.0299
SOUTH CAROLINA                    0.1063        0.1063        0.0830        0.0710
SOUTH DAKOTA                      0.1023        0.1023        0.0715        0.0646
TENNESSEE                         0.1175        0.1175        0.0803        0.0740
TEXAS                             0.1229        0.1229        0.0830        0.0830
UTAH                              0.0959        0.0959        0.0742        0.0606
VERMONT                           0.1395        0.1395        0.0782        0.0778
VIRGINIA                          0.1067        0.0899        0.0706        0.0616
WASHINGTON                        0.1084        0.1084        0.0721        0.0607
WEST VIRGINIA                     0.1022        0.1022        0.0596        0.0596
WISCONSIN                         0.0981        0.0981        0.0720        0.0651
WYOMING                           0.1338        0.1338        0.0818        0.0818
</TABLE>

*Billed on an 18-sec min, 6-sec increments (18/6). Must maintain an average call
duration of 1 min for all intralata and intrastate products

Calls are billed in 6 second increments with a 6 second minimum. Rates apply to
both Outbound 1+ and Inbound 800 Service.

Dedicated Rates apply to Intrastate Carrier Termination Service and Intrastate
800 Origination Service.

                             WorldCom -- PROPRIETARY

                   Not for Use or disclosure outside WorldCom

                         except under written agreement
<PAGE>

                                   Schedule 3

                    WORLDCOM CLASSIC 1+ CANADA / MEXICO RATES

<TABLE>
<CAPTION>
                                                               Switched                 Dedicated
<S>                     <C>                                 <C>
                         Canada Region 1                        0.1150                    0.0850
                         Canada Region 2                        0.1250                    0.0950
                         Canada Region 3                        0.1350                    0.1050
</TABLE>

<TABLE>
<CAPTION>
<S>                     <C>
                         Region (1) NPA's - 250,604,807,905,613,519,416,514,819,418
                         Region (2) NPA's - 403,886,889
                         Region (3) NPA's - 306,204,506,709,902
</TABLE>

<TABLE>
<CAPTION>
<S>                                                  <C>                         <C>
                         Mexico - Band 1                     0.2200                      0.1900
                         Mexico - Band 2                     0.2200                      0.1900
                         Mexico - Band 3                     0.2800                      0.2500
                         Mexico - Band 4                     0.2800                      0.2500
                         Mexico - Band 5                     0.2800                      0.2500
                         Mexico - Band 6                     0.4300                      0.4000
                         Mexico - Band 7                     0.4300                      0.4000
                         Mexico - Band 8                     0.4300                      0.4000

<CAPTION>
                    WORLDCOM CLASSIC INBOUND 800 FROM CANADA

                                                           Switched                   Dedicated

                         Peak                                0.2450                      0.2200
                         Off-Peak                            0.2450                      0.2200

<CAPTION>
              WORLDCOM CLASSIC 1+ CANADA / MEXICO RATES FROM HAWAII

                                            Switched                     Dedicated

                         Canada Region 1     0.1450                           N/A
                         Canada Region 2     0.1550                           N/A
                         Canada Region 3     0.1650                           N/A
</TABLE>

<TABLE>
<CAPTION>
<S>                     <C>
                         Region 1 NPA's - 250,604,807,905,613,519,416,514,819,418
                         Region (2) NPA's - 403,886,889
                         Region (3) NPA's - 306,204,506,709,902
</TABLE>

<TABLE>
<CAPTION>
<S>                                                  <C>
                         Mexico - Band 1     0.2450                           N/A
                         Mexico - Band 2     0.2450                           N/A
                         Mexico - Band 3     0.3050                           N/A
                         Mexico - Band 4     0.3050                           N/A
                         Mexico - Band 5     0.3050                           N/A
                         Mexico - Band 6     0.4550                           N/A
                         Mexico - Band 7     0.4550                           N/A
                         Mexico - Band 8     0.4550                           N/A
</TABLE>

                         Canada and MexiCo are not eligible for discounts.

                         Canada and Mexico calls are billed in 6 second
                            increments with a 30 second minimum.

                             Worldcom - PROPRIETARY

                   Not for use or disclosure outside Worldcom

                         except under written agreement
<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
AFGHANISTAN                       1.2426         1.1921         1.1683         1.1411         1.1191         1.0979         1.0767
ALBANIA                           0.4516         0.4351         0.4260         0.4171         0.4083         0.3997         0.3912
ALGERIA                           0.4730         0.4665         0.4460         0.4367         0.4276         0.4186         0.4097
AMERICAN SAMOA                    0.5425         0.5223         0.5115         0.5009         0.4905         0.4802         0.4701
ANDORRA                           0.3193         0.3081         0.3015         0.2950         0.2884         0.2819         0.2753
ANGOLA                            0.7242         0.6968         0.6825         0.6684         0.6546         0.6411         0.6278
ANGUILLA                          0.6509         0.6263         0.6135         0.6008         0.5884         0.5762         0.5641
ANTARCTICA                        0.6664         0.6412         0.6280         0.6151         0.6024         0.5899         0.5776
ANTARCTICA (SCOTT BASE)           0.6664         0.6412         0.6280         0.6151         0.6024         0.5899         0.5776
ANTIGUA (BARBUDA)                 0.4948         0.4764         0.4666         0.4568         0.4473         0.4379         0.4287
ARGENTINA                         0.6065         0.5838         0.5717         0.5599         0.5483         0.5369         0.6257
ARMENIA                           0.8765         0.8429         0.8257         0.8088         0.7922         0.7759         0.7599
ARUBA                             0.4236         0.4082         0.3996         0.3813         0.3830         0.3749         0.3669
ASCENSION ISLAND                  0.8269         0.7953         0.7790         0.7630         0.7474         0.7320         0.7168
AUSTRALIA                         0.2262         0.2126         0.2064         0.1962         0.1908         0.1858         0.1804
AUSTRIA                           0.2851         0.2742         0.2676         0.2611         0.2545         0.2480         0.2414
AZERBAIJAN                        0.8154         0.7820         0.7665         0.7473         0.7331         0.7196         0.7060
BAHAMAS                           0.2690         0.2581         0.2516         0.2450         0.2385         0.2319         0.2254
BAHRAIN                           0.8021         0.7715         0.7557         0.7402         0.7250         0.7100         0.6953
BANGLADESH                        1.2793         1.2273         1.2029         1.1750         1.1523         1.1304         1.1086
BARBADOS                          0.5983         0.5759         0.5640         0.5523         0.5409         0.5296         0.5185
BELARUS                           0.5385         0.5185         0.5077         0.4972         0.4868         0.4766         0.4666
BELGIUM                           0.2405         0.2296         0.2230         0.2165         0.2099         0.2034         0.1968
BELIZE                            0.8135         0.7825         0.7665         0.7607         0.7353         0.7201         0.7053
BENIN                             0.6498         0.6253         0.6124         0.5998         0.5873         0.5751         0.6632
BERMUDA                           0.2639         0.2529         0.2464         0.2399         0.2333         0.2268         0.2202
BHUTAN                            0.9378         0.9017         0.8833         0.8653         0.8476         0.8302         0.8131
BOLIVIA                           0.6635         0.6384         0.6253         0.6124         0.5997         0.5873         0.5750
BOSNIA & HERZEGOVINA              0.5525         0.5319         0.5209         0.5101         0.4994         0.4890         0.4787
BOTSWANA                          0.7959         0.7656         0.7499         0.7345         0.7194         0.7046         0.6900
BRAZIL                            0.4765         0.4590         0.4494         0.4400         0.4308         0.4218         0.4128
BRITISH VIRGIN ISLANDS            0.4390         0.4229         0.4141         0.4054         0.3969         0.3885         0.3802
BRUNEI                            0.4979         0.4795         0.4695         0.4598         0.4501         0.4407         0.4314
BULGARIA                          0.4364         0.4204         0.4117         0.4031         0.3946         0.3862         0.3780
BURKINA FASO                      0.7069         0.6778         0.6644         0.6472         0.6351         0.6235         0.6119
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 1 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
BURUNDI                           0.9011         0.8665         0.8489         0.8315         0.8144         0.7977         0.7813
CAMBODIA                          0.9285         0.8928         0.8746         0.8568         0.8392         0.8220         0.8050
CAMEROON                          0.8905         0.8564         0.8389         0.8217         0.8049         0.7883         0.7721
CAPE VERDE ISLANDS                0.5214         0.4998         0.4899         0.4762         0.4675         0.4593         0.4509
CAYMAN ISLANDS                    0.4614         0.4444         0.4352         0.4261         0.4171         0.4083         0.3997
CNETRAL AFRICAN REP.              1.1676         1.1224         0.0996         1.0772         1.0552         1.0337         1.0125
CHAD                              1.1970         1.1506         1.1273         1.1043         1.0818         1.0597         1.0381
CHILE                             0.3590         0.3461         0.3388         0.3317         0.3246         0.3177         0.3108
CHINA                             0.9489         0.9124         0.8938         0.8756         0.8576         0.8400         0.8227
CHRISTMAS & COCOS IS.             0.4326         0.4168         0.4081         0.3996         0.3911         0.3829         0.3747
COLOMBIA                          0.6191         0.5958         0.5835         0.5716         0.5596         0.5480         0.5365
COMOROS                           1.1254         1.0819         1.0599         1.0383         1.0171         0.9963         0.9759
CONGO                             0.9825         0.9424         0.9236         0.9013         0.8840         0.8676         0.8510
COOK ISLANDS                      1.2591         1.2102         1.1856         1.1615         1.1379         1.1147         1.0919
COSTA RICA                        0.5614         0.5404         0.5292         0.5183         0.5075         0.4969         0.4865
CROATIA, REPUBLIC OF              0.4244         0.4089         0.4004         0.3920         0.3837         0.3756         0.3676
CUBA                              0.6112         0.5859         0.5743         0.5589         0.5486         0.5388         0.5288
CYPRUS                            0.4784         0.4607         0.4511         0.4417         0.4325         0.4234         0.4144
CZECH REPUBLIC                    0.3676         0.3544         0.3470         0.3396         0.3324         0.3253         0.3183
DENMARK                           0.2146         0.2037         0.1971         0.1906         0.1840         0.1775         0.1709
DIEGO GARCIA                      1.0021         0.9635         0.9439         0.9247         0.9057         0.8872         0.8689
DJIBOUTI                          1.0006         0.9620         0.9424         0.9232         0.9043         0.8858         0.8676
DOMINICA                          0.6010         0.5784         0.5665         0.5548         0.5433         0.5320         0.5208
DOMINICAN REPUBLIC                0.3707         0.3574         0.3499         0.3425         0.3352         0.3281         0.3210
ECUADOR                           0.6615         0.6365         0.6235         0.6106         0.5980         0.5856         0.5734
EGYPT                             0.7927         0.7624         0.7468         0.7315         0.7165         0.7017         0.6872
EL SALVADOR                       0.6147         0.5916         0.5794         0.5675         0.5557         0.5441         0.5328
EQUATORIAL GUINEA                 1.3966         1.3422         1.3150         1.2884         1.2622         1.2365         1.2113
ERIYREA                           1.2842         1.2343         1.2093         1.1847         1.1606         1.1369         1.1137
ESTONIA                           0.3568         0.3440         0.3368         0.3296         0.3226         0.3157         0.3089
ETHIOPIA                          1.1152         1.0721         1.0503         1.0289         1.0079         0.9873         0.9671
FAEROE ISLANDS                    0.3748         0.3613         0.3537         0.3462         0.3389         0.3316         0.3245
FALKLAND ISLANDS                  0.9149         0.8798         0.8619         0.8442         0.8269         0.8099         0.7933
FIJA ISLANDS                      1.0636         1.0226         1.0018         0.9814         0.9613         0.9416         0.9223
FINLAND                           0.2297         0.2188         0.2122         0.2057         0.1991         0.1926         0.1860
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 2 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
FRANCE                            0.2131         0.2022         0.1956         0.1891         0.1825         0.1760         0.1694
FRENCH ANTILLES                   0.5025         0.4839         0.4739         0.4640         0.4543         0.4448         0.4354
FRENCH GUIANA                     0.5270         0.5074         0.4969         0.4866         0.4765         0.4665         0.4567
FRENCH POLYNESIA                  0.7616         0.7326         0.7176         0.7029         0.6884         0.6742         0.6602
GABON                             0.9371         0.9011         0.8827         0.8647         0.8470         0.8296         0.8125
GAMBIA                            0.6914         0.6652         0.6515         0.6381         0.6249         0.6120         0.5993
GEORGIA                           0.7861         0.7562         0.7407         0.7255         0.7105         0.6959         0.6815
GERMANY                           0.1997         0.1888         0.1822         0.1757         0.1692         0.1626         0.1561
CHANA                             0.6887         0.6604         0.6473         0.6305         0.6187         0.6075         0.5961
GIBRALTAR                         0.5447         0.5244         0.5136         0.5029         0.4924         0.4821         0.4720
GREECE                            0.4264         0.4108         0.4022         0.3938         0.3855         0.3774         0.3693
GREENLAND                         0.5321         0.5101         0.5000         0.4861         0.4772         0.4688         0.4602
GRENADA                           0.6215         0.5981         0.5858         0.5737         0.5618         0.5501         0.5386
GUADELOUPE                        0.5579         0.5371         0.6260         0.5151         0.5043         0.4938         0.4835
GUAM                              0.2123         0.2014         0.1948         0.1883         0.1817         0.1752         0.1686
GUANTANAMO BAY                    0.7860         0.7560         0.7406         0.7254         0.7104         0.6958         0.6814
GUATEMALA                         0.5659         0.5448         0.5335         0.5225         0.5116         0.5009         0.4904
GUINEA                            0.4750         0.7167         0.7020         0.6875         0.6734         0.6595         0.6458
GUINEA BISBAU                     1.4458         1.3894         1.3613         1.3337         1.3066         1.2800         1.2539
GUYANA                            0.8962         0.8619         0.8443         0.8270         0.8101         0.7934         0.7771
HAITI                             0.7176         0.6904         0.6762         0.6623         0.6486         0.6352         0.6220
HONDURAS                          0.6824         0.6566         0.6431         0.6298         0.6168         0.6040         0.5915
HONG KONG                         0.4845         0.4643         0.4551         0.4421         0.4341         0.4266         0.4189
HUNGARY                           0.3355         0.3236         0.3168         0.3100         0.3034         0.2969         0.2903
ICELAND                           0.3583         0.3454         0.3382         0.3310         0.3240         0.3171         0.3102
INDIA                             0.8181         0.7869         0.7708         0.7550         0.7395         0.7242         0.7093
INDONESIA                         0.7065         0.6798         0.6658         0.6521         0.6386         0.6254         0.6124
IRAN                              1.0196         0.9803         0.9604         0.9408         0.9215         0.9027         0.8841
IRAQ                              1.2888         1.2364         1.2118         1.1837         1.1608         1.1388         1.1168
IRELAND, REPUBLIC OF              0.2895         0.2786         0.2720         0.2665         0.2589         0.2524         0.2459
ISRAEL                            0.5168         0.4976         0.4873         0.4772         0.4672         0.4574         0.4478
ITALY                             0.2602         0.2493         0.2428         0.2362         0.2297         0.2231         0.2166
IVORY COAST                       1.1312         1.0875         1.0653         1.0436         1.0224         1.0015         0.9809
JAMAICA                           0.6319         0.6081         0.5956         0.5833         0.5712         0.5594         0.5477
JAPAN                             0.3418         0.3274         0.3209         0.3106         0.3052         0.3002         0.2948
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 3 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
JORDAN                            0.8280         0.7940         0.7783         0.7588         0.7444         0.7308         0.7169
KAZAKHSTAN                        0.9713         0.9317         0.9132         0.8910         0.8740         0.8577         0.8414
KENYA                             0.8100         0.7791         0.7631         0.7475         0.7321         0.7170         0.7022
KIRIBATI                          1.0996         1.0571         1.0356         1.0145         0.9937         0.9734         0.9535
KUWAIT                            0.8872         0.8509         0.8340         0.8134         0.7979         0.7832         0.7683
KYRGYZSTAN                        1.0626         1.0216         1.0008         0.9804         0.9604         0.9407         0.9214
LAOS                              0.9672         0.9300         0.9111         0.8925         0.8742         0.8563         0.8387
LATVIA                            0.4168         0.4016         0.3933         0.3850         0.3769         0.3689         0.3610
LEBANON                           0.9194         0.8841         0.8661         0.8484         0.8310         0.8139         0.7972
LESOTHO                           0.8686         0.8353         0.8183         0.8015         0.7851         0.7689         0.7531
LIBERIA                           0.6507         0.6261         0.6133         0.6006         0.5882         0.5760         0.5640
LIBYA                             0.5873         0.5653         0.5536         0.5422         0.5309         0.5198         0.5089
LIECHTENSTEIN                     0.2368         0.2259         0.2193         0.2128         0.2062         0.1997         0.1932
LITHUANIA                         0.4741         0.4566         0.4471         0.4378         0.4286         0.4196         0.4107
LUXEMBOURG                        0.2090         0.1981         0.1915         0.1850         0.1784         0.1719         0.1663
MACAO                             0.5997         0.5772         0.5653         0.5536         0.5421         0.5308         0.5197
MACEDONIA                         0.5593         0.5384         0.5273         0.5163         0.5056         0.4950         0.4846
MADAGASCAR                        1.0727         1.0313         1.0103         0.9897         0.9695         0.9497         0.9302
MALAWI                            0.5569         0.5338         0.5233         0.5089         0.4995         0.4907         0.4817
MALAYBIA                          0.4101         0.3951         0.3869         0.3788         0.3708         0.3629         0.3552
MALDNES                           0.7779         0.7482         0.7329         0.7179         0.7031         0.6886         0.6743
MALI REPUBLIC                     0.9892         0.9489         0.9300         0.9075         0.8902         0.8735         0.8569
MALTA                             0.3518         0.3392         0.3321         0.3251         0.3182         0.3113         0.3046
MARISAT-ATLANTIC OCEAN            6.7779         6.5083         6.3778         6.2498         6.1244         6.0015         5.8809
MARISAT-INDIAN OCEAN              6.3599         6.1047         5.9828         5.8592         5.7428         5.6292         5.5174
MARISAT-PACIFIC OCEAN             5.8433         5.6088         5.4967         5.3829         5.2760         5.1717         5.0691
MARISAT W. ATLANTIC               6.6094         6.3442         6.2175         6.0892         5.9682         5.8501         5.7338
MARSHALL ISLANDS                  0.5855         0.5636         0.5520         0.5405         0.5293         0.5183         0.5074
MAURITANIA                        0.9489         0.9124         0.8938         0.8756         0.8676         0.8400         0.8227
MAURITIUS                         0.8784         0.8448         0.8275         0.8106         0.7939         0.7776         0.7616
MAYOTTE ISLAND                    1.1254         1.0819         1.0599         1.0383         1.0171         0.9963         0.9759
MICRONESIA                        0.7209         0.6936         0.6794         0.6654         0.6517         0.6382         0.6249
MOLDOVA                           0.8469         0.8145         0.7978         0.7815         0.7654         0.7497         0.7342
MONACO                            0.2580         0.2471         0.2405         0.2340         0.2274         0.2209         0.2143
MONGOLIA                          1.3048         1.2541         1.2287         1.2037         1.1792         1.1552         1.1316
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 4 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
MONTSERRAT                        0.6006         0.5781         0.5662         0.5545         0.5430         0.5316         0.5205
MOROCCO                           0.4837         0.4658         0.4561         0.4466         0.4373         0.4281         0.4190
MOZAMBIQUE                        0.7776         0.7480         0.7327         0.7176         0.7029         0.6884         0.6741
MYANMAR (BURMA)                   1.6323         1.5685         1.5368         1.5057         1.4751         1.4452         1.4158
NAKHOOKA                          0.6229         0.5994         0.6871         0.5750         0.5630         0.5513         0.5398
NAMIBIA                           0.8070         0.7762         0.7603         0.7447         0.7294         0.7143         0.6996
NAURU                             0.9573         0.9205         0.9017         0.8833         0.8652         0.8474         0.8300
NEPAL                             1.0336         0.9938         0.9735         0.9537         0.9342         0.9151         0.8963
NETHERLANDS                       0.2176         0.2067         0.2001         0.1936         0.1870         0.1805         0.1739
NETHERLANDS ANTILLES              0.3790         0.3654         0.3577         0.3501         0.3427         0.3354         0.3282
NEW CALEDONIA                     0.8996         0.8651         0.8475         0.8301         0.8131         0.7964         0.7800
NEW ZEALAND                       0.2290         0.2181         0.2115         0.2050         0.1984         0.1919         0.1853
NICARAGUA                         0.6679         0.6427         0.6295         0.6165         0.6038         0.5912         0.5789
NIGER                             0.9591         0.9222         0.9034         0.8849         0.8668         0.8490         0.8316
NIGERIA                           0.8053         0.7723         0.7570         0.7380         0.7240         0.7107         0.6973
NIUE ISLAND                       1.2149         1.1678         1.1441         1.1208         1.0980         1.0766         1.0536
NORFOLK ISLAND                    0.6422         0.6157         0.6035         0.5875         0.5766         0.5662         0.5557
NORTH KOREA                       1.0055         0.9645         0.9453         0.9225         0.9049         0.8880         0.8710
NORWAY                            0.1779         0.1669         0.1604         0.1539         0.1473         0.1408         0.1342
OMAN                              0.9246         0.8891         0.8710         0.8532         0.8357         0.8185         0.8017
PAKISTAN                          1.2016         1.1650         1.1315         1.1085         1.0859         1.0638         1.0420
PALAU                             0.9376         0.9016         0.8832         0.8652         0.8474         0.8300         0.8129
PANAMA                            0.6313         0.6076         0.5951         0.5828         0.5707         0.5588         0.5472
PAPUA NEW GUINEA                  0.5559         0.5351         0.5241         0.5132         0.5025         0.4920         0.4817
PARAGUAY                          0.8384         0.8063         0.7899         0.7737         0.7578         0.7422         0.7268
PERU                              0.6318         0.6080         0.5955         0.5832         0.5711         0.5592         0.5475
PHILIPPINES                       0.5767         0.5552         0.5437         0.5324         0.5214         0.5105         0.4998
POLAND                            0.4085         0.3937         0.3854         0.3773         0.3694         0.3615         0.3538
PORTUGAL                          0.3848         0.3709         0.3631         0.3555         0.3479         0.3405         0.3332
QATAR                             0.9085         0.8736         0.8558         0.8383         0.8211         0.8043         0.7877
REUNION ISLAND                    0.7207         0.6933         0.6791         0.6651         0.6514         0.6379         0.6247
ROMANIA                           0.5542         0.5335         0.5225         0.5116         0.5010         0.4905         0.4802
RUSSIA                            0.6126         0.5896         0.5775         0.5655         0.5538         0.5423         0.5309
RWANDA                            0.9011         0.8666         0.8489         0.8315         0.8145         0.7977         0.7813
SAIPAN                            0.4969         0.4762         0.4668         0.4536         0.4453         0.4376         0.4296
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 5 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
SAKAHLIN                          0.6267         0.6031         0.5907         0.5785         0.5665         0.5547         0.5432
SAN MARINO                        0.4685         0.4512         0.4418         0.4326         0.4235         0.4146         0.4058
SAO TOME                          1.1547         1.1100         1.0875         1.0653         1.0436         1.0223         1.0014
SAUDI ARABIA                      0.8715         0.8381         0.8210         0.8042         0.7877         0.7715         0.7556
SENEGAL REPUBLIC                  1.5967         1.5343         1.5032         1.4728         1.4429         1.4136         1.3848
SEYCHELLES                        1.4589         1.4020         1.3736         1.3458         1.3184         1.2916         1.2653
SIERRA LEONE                      0.9324         0.8966         0.8783         0.8603         0.8427         0.8254         0.8084
SINGAPORE                         0.3392         0.3271         0.3202         0.3134         0.3068         0.3002         0.2936
SLOVAKIA                          0.4098         0.3949         0.3866         0.3785         0.3705         0.3627         0.3549
SLOVENIA, REPUBLIC OF             0.4443         0.4280         0.4191         0.4103         0.4017         0.3932         0.3848
SOLOMON ISLANDS                   1.0399         0.9998         0.9794         0.9594         0.9398         0.9206         0.9017
SOMALIA                           1.6725         1.6048         1.5728         1.5375         1.5075         1.4786         1.4498
SOUTH AFRICA                      0.5732         0.5518         0.5404         0.5292         0.5182         0.5074         0.4967
SOUTH KOREA                       0.4948         0.4765         0.4666         0.4569         0.4473         0.4379         0.4287
SPAIN                             0.3378         0.3268         0.3189         0.3122         0.3055         0.2989         0.2924
SRI LANKA                         0.9655         0.9284         0.9095         0.8909         0.8727         0.8548         0.8372
ST HELENA                         1.2158         1.1664         1.1432         1.1164         1.0949         1.0742         1.0535
ST KITTS & NEVIS                  0.6151         0.4960         0.4857         0.4756         0.4657         0.4559         0.4463
ST LUCIA                          0.5667         0.5432         0.5325         0.5179         0.5084         0.4994         0.4902
ST PIERREMIQUELON                 0.4574         0.4406         0.4314         0.4224         0.4135         0.4048         0.3962
ST VINCENT/GRENADINES             0.6630         0.6357         0.6231         0.6067         0.5954         0.5847         0.5738
SUDAN                             0.6455         0.6212         0.6084         0.5958         0.5835         0.5714         0.5595
SURINAME                          1.1591         1.1142         0.0916         1.0694         1.0476         1.0262         1.0052
SWAZILAND                         0.6158         0.5926         0.5804         0.5684         0.5567         0.5451         0.5337
SWEDEN                            0.1723         0.1614         0.1548         0.1483         0.1417         0.1352         0.1286
SWITZERLAND                       0.2231         0.2122         0.2056         0.1991         0.1925         0.1860         0.1794
SYRIA                             1.0708         1.0295         1.0085         0.9880         0.9678         0.9480         0.9285
TAIWAN                            0.5112         0.4923         0.4821         0.4720         0.4622         0.4525         0.4429
TAJIKISTAN                        0.9796         0.9396         0.9210         0.8987         0.8815         0.8650         0.8485
TANZANIA                          0.8219         0.7905         0.7743         0.7584         0.7428         0.7275         0.7125
THAILAND                          0.7438         0.7132         0.6991         0.6812         0.6684         0.6562         0.6439
TOGO                              0.9074         0.8703         0.8531         0.8321         0.8163         0.8011         0.7859
TONGA ISLANDS                     0.9636         0.9265         0.9077         0.8891         0.8709         0.8530         0.8355
TRINIDAD/TOBAGO                   0.7086         0.6817         0.6677         0.6540         0.6405         0.6272         0.6142
TUNISIA                           0.5382         0.5181         0.5074         0.4969         0.4865         0.4763         0.4663
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 6 of 7

<PAGE>

                                   SCHEDULE 4

                 WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC       CLASSIC         CLASSIC        CLASSIC
                                SWITCHED      SWITCHED       SWITCHED       SWITCHED      SWITCHED        SWITCHED       SWITCHED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
TURKEY                            0.5046         0.4859         0.4758         0.4659         0.4561         0.4466         0.4372
TURKMENISTAN                      0.9330         0.8972         0.8789         0.8609         0.8433         0.8259         0.8089
TURKS AND CAICOS IS.              0.5553         0.5345         0.5235         0.5126         0.5020         0.4915         0.4812
TUVALU                            0.9928         0.9546         0.9351         0.9160         0.8973         0.8789         0.8608
UGANDA                            0.6519         0.6274         0.6144         0.6018         0.5893         0.5771         0.5651
UKRAINE                           0.5429         0.5227         0.5118         0.5012         0.4908         0.4805         0.4704
UNITED ARAB EMIRATES              0.6562         0.6314         0.6185         0.6057         0.5932         0.5808         0.5687
UNITED KINGDOM                    0.1500         0.1400         0.1350         0.1300         0.1250         0.1200         0.1150
URUGUAY                           0.7944         0.7641         0.7484         0.7331         0.7180         0.7032         0.6886
UZBEKISTAN                        0.8226         0.7912         0.7750         0.7591         0.7435         0.7282         0.7132
VANUATU                           1.3282         1.2766         1.2507         1.2253         1.2004         1.1769         1.1519
VATICAN CITY                      0.3623         0.3493         0.3420         0.3347         0.3276         0.3206         0.3137
VENEZUELA                         0.4082         0.3933         0.3851         0.3770         0.3691         0.3612         0.3536
VIETNAM                           1.1117         1.0687         1.0470         1.0256         1.0047         0.9842         0.9640
WALLIS & FUTUNA                   0.4249         0.4071         0.3991         0.3872         0.3803         0.3738         0.3672
WESTERN SAMOA                     0.9629         0.9236         0.9052         0.8832         0.8663         0.8502         0.8340
YEMEN ARAS REPUBLIC               0.8966         0.8622         0.8446         0.8273         0.8104         0.7937         0.7774
YUGOSLAVIA, FEDERAL REP.          0.4653         0.4482         0.4389         0.4297         0.4207         0.4118         0.4031
ZAIRE                             0.5764         0.5525         0.5416         0.5269         0.5172         0.5080         0.4986
ZAMBIA                            0.7695         0.7380         0.7233         0.7050         0.6917         0.6790         0.6662
ZIMBABWE                          0.6495         0.6250         0.6122         0.5995         0.5871         0.5749         0.5629
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 7 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
AFGHANISTAN                       1.2126         1.1621         1.1383         1.1111         1.0891         1.0679         1.0467
ALBANIA                           0.4216         0.4051         0.3960         0.3871         0.3783         0.3697         0.3612
ALGERIA                           0.4430         0.4255         0.4160         0.4067         0.3976         0.3886         0.3797
AMERICAN SAMOA                    0.5125         0.4923         0.4815         0.4709         0.4605         0.4502         0.4401
ANDORRA                           0.2893         0.2781         0.2715         0.2650         0.2584         0.2519         0.2453
ANGOLA                            0.6942         0.6668         0.6525         0.6384         0.6246         0.6111         0.5978
ANGUILLA                          0.6209         0.5963         0.5835         0.5708         0.5584         0.5462         0.5341
ANTARCTICA                        0.6364         0.6112         0.5980         0.5851         0.5724         0.5599         0.5476
ANTARCTICA (SCOTT BASE)           0.6364         0.6112         0.5980         0.5851         0.5724         0.5599         0.5476
ANTIGUA (BARGUDA)                 0.4648         0.4464         0.4366         0.4268         0.4173         0.4079         0.3987
ARGENTINA                         0.5765         0.5538         0.5417         0.5299         0.5183         0.5069         0.4957
ARMENIA                           0.8465         0.8129         0.7957         0.7788         0.7622         0.7459         0.7299
ARUBA                             0.3936         0.3782         0.3698         0.3613         0.3530         0.3449         0.3369
ASCENSION ISLAND                  0.7969         0.7653         0.7490         0.7330         0.7174         0.7020         0.6868
AUSTRALIA                         0.1962         0.1826         0.1764         0.1662         0.1608         0.1558         0.1504
AUSTRIA                           0.2551         0.2442         0.2376         0.2311         0.2245         0.2180         0.2114
AZERBAIJAN                        0.7854         0.7520         0.7365         0.7173         0.7031         0.6896         0.6760
BAHAMAS                           0.2390         0.2281         0.2216         0.2150         0.2085         0.2019         0.1954
BAHRAIN                           0.7721         0.7415         0.7257         0.7102         0.6950         0.6800         0.6653
BANGLADESH                        1.2493         1.1973         1.1729         1.1450         1.1223         1.1004         1.0786
BARBADOS                          0.5683         0.5459         0.5340         0.5223         0.5109         0.4996         0.4885
BELARUS                           0.5085         0.4885         0.4777         0.4672         0.4568         0.4466         0.4366
BELGIUM                           0.2106         0.1996         0.1930         0.1865         0.1799         0.1734         0.1668
BELIZE                            0.7835         0.7525         0.7365         0.7207         0.7053         0.6901         0.6753
BENIN                             0.6198         0.5953         0.5824         0.5698         0.5573         0.5451         0.5332
BERMUDA                           0.2339         0.2229         0.2164         0.2099         0.2033         0.1968         0.1902
BHUTAN                            0.9078         0.8717         0.8533         0.8353         0.8176         0.8002         0.7831
BOLIVIA                           0.6335         0.6084         0.5953         0.5824         0.5697         0.5573         0.5450
BOSNIA & HERZEGOVINA              0.5225         0.5019         0.4909         0.4801         0.4694         0.4590         0.4487
BOTSWANA                          0.7659         0.7356         0.7199         0.7045         0.6894         0.6746         0.6600
BRAZIL                            0.4465         0.4290         0.4194         0.4100         0.4008         0.3618         0.3828
BRITISH VIRGIN ISLANDS            0.4090         0.3929         0.3841         0.3754         0.3669         0.3585         0.3602
BRUNEI                            0.4679         0.4495         0.4395         0.4298         0.4201         0.4107         0.4014
BULGARIA                          0.4064         0.3904         0.3817         0.3731         0.3646         0.3562         0.3480
BURKINA FASO                      0.6769         0.6478         0.6344         0.6172         0.6051         0.5935         0.5819
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 1 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
BURUNDI                           0.8711         0.8365         0.8189         0.8015         0.7844         0.7677         0.7513
CAMBODIA                          0.8985         0.8628         0.8446         0.8268         0.8092         0.7920         0.7750
CAMEROON                          0.8605         0.8264         0.8089         0.7917         0.7749         0.7583         0.7421
CAPE VERDE ISLANDS                0.4914         0.4698         0.4599         0.4462         0.4375         0.4293         0.4209
CAYMAN ISLANDS                    0.4314         0.4144         0.4052         0.3361         0.3871         0.3783         0.3697
CENTRAL AFRICAN REP.              1.1376         1.0924         1.0696         1.0472         1.0252         1.0037         0.9825
CHAD                              1.1670         1.1206         1.0973         1.0743         1.0518         1.2097         1.0081
CHILE                             0.3290         0.3161         0.3088         0.3017         0.2946         0.2877         0.2808
CHINA                             0.9189         0.8824         0.8638         0.8456         0.8276         0.8100         0.7927
CHRISTMAS & COCO IS.              0.4026         0.3868         0.3781         0.3696         0.3611         0.3529         0.3447
COLOMBIA                          0.5891         0.5658         0.5535         0.5415         0.5296         0.5180         0.5065
COMOROS                           1.0954         1.0519         1.0299         1.0083         0.9871         0.9663         0.9459
CONGO                             0.9525         0.9124         0.6936         0.8713         0.8540         0.8376         0.8210
COOK ISLANDS                      1.2291         1.1802         1.1556         1.1315         1.1079         1.0847         1.0619
COSTA RICA                        0.5314         0.5104         0.4992         0.4883         0.4475         0.4669         0.4565
CROATIA, REPUBLIC OF              0.3944         0.3789         0.3704         0.3620         0.3537         0.3456         0.3376
CUBA                              0.5812         0.5559         0.5443         0.5289         0.5186         0.5088         0.4988
CYPRUS                            0.4484         0.4307         0.4211         0.4117         0.4025         0.3934         0.3844
CZECH REPUBLIC                    0.3376         0.3244         0.3170         0.3096         0.3024         0.2953         0.2883
DENMARK                           0.1846         0.1737         0.1671         0.1606         0.1540         0.1475         0.1409
DIEGO GARCIA                      0.9721         0.9335         0.9139         0.8947         0.8757         0.8572         0.8389
DJIBOUTI                          0.9706         0.9320         0.9124         0.8932         0.8743         0.8558         0.8376
DOMINICA                          0.5710         0.5484         0.5365         0.5248         0.5133         0.5020         0.4908
DOMINICAN REPUBLIC                0.3407         0.3274         0.3199         0.3125         0.3052         0.2981         0.2910
ECUADOR                           0.6315         0.6065         0.5935         0.5806         0.5680         0.5556         0.5434
EGYPT                             0.7627         0.7324         0.7168         0.7016         0.6865         0.6717         0.6572
EL SALVADOR                       0.5847         0.5616         0.5494         0.5375         0.5257         0.5141         0.5028
EQUATORIAL GUINEA                 1.3666         1.3122         1.2850         1.2584         1.2322         1.2065         1.1813
ERITREA                           1.2542         1.2043         1.1793         1.1547         1.1306         1.1069         1.0837
ESTONIA                           0.3268         0.3140         0.3068         0.2996         0.2926         0.2857         0.2789
ETHIOPIA                          1.0852         1.0421         1.0203         0.9989         0.9779         0.9573         0.9371
FAEROE ISLANDS                    0.3448         0.3313         0.3237         0.3162         0.3089         0.3016         0.2945
FALKLAND ISLANDS                  0.8494         0.8498         0.8319         0.8142         0.7969         0.7799         0.7633
FIJI ISLANDS                      1.0336         0.9926         0.9718         0.9514         0.9313         0.9116         0.8923
FINLAND                           0.1997         0.1888         0.1822         0.1757         0.1691         0.1626         0.1560
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 2 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
FRANCE                            0.1831         0.1722         0.1656         0.1591         0.1525         0.1460         0.1394
FRENCH ANTILLES                   0.4725         0.4639         0.4439         0.4340         0.4243         0.4148         0.4054
FRENCH GUIANA                     0.4970         0.4774         0.4669         0.4566         0.4465         0.4365         0.4267
FRENCH POLYNESIA                  0.7316         0.7026         0.6867         0.6729         0.6584         0.6442         0.6302
GABON                             0.9071         0.8711         0.8527         0.8347         0.8170         0.7996         0.7825
GAMBIA                            0.6614         0.6352         0.6215         0.6081         0.5949         0.5820         0.5693
GEORGIA                           0.7561         0.7262         0.7107         0.6955         0.6805         0.6659         0.6515
GERMANY                           0.1697         0.1588         0.1522         0.1457         0.1392         0.1326         0.1261
GHANA                             0.6587         0.6304         0.6173         0.6005         0.5887         0.5775         0.5661
GIBRALTAR                         0.5147         0.4944         0.4836         0.4729         0.4624         0.4521         0.4420
GREECE                            0.3964         0.3808         0.3722         0.3638         0.3555         0.3474         0.3393
GREENLAND                         0.5021         0.4801         0.4700         0.4561         0.4472         0.4388         0.4302
GRENADA                           0.5915         0.5681         0.5558         0.5437         0.5318         0.5201         0.5086
GUADELOUPE                        0.5279         0.5071         0.4960         0.4851         0.4743         0.4638         0.4535
GAUM                              0.1823         0.1714         0.1648         0.1583         0.1517         0.1452         0.1386
GUANTANAMO BAY                    0.7560         0.7260         0.7106         0.6954         0.6804         0.6658         0.6514
GUATEMALA                         0.5359         0.5148         0.5035         0.4925         0.4816         0.4709         0.4604
GUINEA                            0.7150         0.6867         0.6720         0.6575         0.6434         0.6295         0.6158
GUINEA BISSAU                     1.4158         1.3594         1.3313         1.3037         1.2766         1.2500         1.2239
GUYANA                            0.8662         0.8319         0.8143         0.7970         0.7801         0.7634         0.7471
HAITI                             0.6876         0.6604         0.6462         0.6363         0.6186         0.6052         0.5920
HONDRURAS                         0.6524         0.6266         0.6131         0.5998         0.5868         0.5740         0.5615
HONG KONG                         0.4545         0.4343         0.4251         0.4121         0.4041         0.3966         0.3889
HUNGARY                           0.3055         0.2936         0.2868         0.2800         0.2734         0.2669         0.2603
ICELAND                           0.3283         0.3154         0.3082         0.3010         0.2940         0.2871         0.2802
IDIA                              0.7881         0.7569         0.7408         0.7250         0.7095         0.6942         0.6793
IDONESIA                          0.6765         0.6498         0.6358         0.6221         0.6086         0.5954         0.5824
IRAN                              0.9896         0.9503         0.9304         0.9108         0.8915         0.8727         0.8541
IRAQ                              1.2588         1.2064         1.1818         1.1537         1.1308         1.1088         1.0868
IRELAND, REPUBLIC OF              0.2596         0.2486         0.2420         0.2355         0.2289         0.2224         0.2159
ISRAEL                            0.4868         0.4676         0.4573         0.4472         0.4372         0.4274         0.4178
ITALY                             0.2303         0.2193         0.2128         0.2062         0.1997         0.1931         0.1866
IVORY COAST                       1.1012         1.0575         1.0353         1.0136         0.9924         0.9715         0.9509
JAMAICA                           0.6019         0.5781         0.5656         0.5533         0.5412         0.5294         0.5177
JAPAN                             0.3116         0.2974         0.2909         0.2806         0.2752         0.2702         0.2648
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 3 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
JORDAN                            0.7980         0.7640         0.7483         0.7288         0.7144         0.7008         0.6869
KAZAKHSTAN                        0.9413         0.9017         0.6832         0.8610         0.8440         0.8277         0.8114
KENYA                             0.7800         0.7491         0.7331         0.7175         0.7021         0.6870         0.6722
KIRIBATI                          1.0696         1.0271         1.0056         0.9845         0.9637         0.9434         0.9235
KUWAIT                            0.8572         0.8209         0.8040         0.7834         0.7679         0.7532         0.7383
KYRGYZSTAN                        1.0326         0.9916         0.9708         0.9504         0.9304         0.9107         0.8914
LAOS                              0.9372         0.9000         0.8811         0.8625         0.8442         0.8263         0.8087
LATVIA                            0.3868         0.3716         0.3633         0.3550         0.3469         0.3389         0.3310
LEBANON                           0.8894         0.8541         0.8361         0.8184         0.8010         0.7839         0.7672
LESOTHO                           0.8386         0.8053         0.7883         0.7715         0.7551         0.7389         0.7231
LIBERIA                           0.6207         0.5961         0.5833         0.5706         0.6582         0.5460         0.5340
LIBYA                             0.5573         0.5353         0.5236         0.5122         0.5009         0.4898         0.4789
LIECHTENSTEIN                     0.2068         0.1959         0.1893         0.1828         0.1762         0.1697         0.1632
LITHUANIA                         0.4441         0.4266         0.4171         0.4078         0.3986         0.3896         0.3807
LUXEMBOURG                        0.1790         0.1681         0.1615         0.1550         0.1484         0.1419         0.1353
MACAO                             0.5697         0.5472         0.5353         0.5236         0.5121         0.5008         0.4897
MACEDONIA                         0.5293         0.5084         0.4973         0.4863         0.4756         0.4650         0.4546
MADAGASCAR                        1.0427         1.0013         0.9803         0.9597         0.9395         0.9197         0.9002
MALAWI                            0.5269         0.5038         0.4933         0.4789         0.4695         0.4607         0.4517
MALAYSIA                          0.3801         0.3651         0.3569         0.3488         0.3408         0.3329         0.3252
MALDIVES                          0.7479         0.7182         0.7029         0.6879         0.6731         0.6586         0.6443
MALI REPUBLIC                     0.9592         0.9189         0.9000         0.8775         0.8602         0.8435         0.8269
MALTA                             0.3218         0.3092         0.3021         0.2951         0.2882         0.2813         0.2746
MARISAT-ATLANTIC OCEAN            6.7479         6.4783         6.3478         6.2198         6.0944         5.9715         5.8509
MARISAT-INDIAN OCEAN              6.3299         6.0747         5.9528         5.8292         5.7128         5.5992         5.4874
MARISAT-PACIFIC OCEAN             5.8133         5.5788         5.4667         5.3529         5.2460         5.1417         5.0391
MARISAT-W. ATLANTIC               6.5794         6.3142         6.1875         6.0592         5.9382         5.8201         5.7038
MARSHALL ISLANDS                  0.5555         0.5336         0.5220         0.6105         0.4993         0.4883         0.4774
MAURITANIA                        0.9189         0.8824         0.8638         0.8456         0.8276         0.8100         0.7927
MAURITIUS                         0.8484         0.8148         0.7975         0.7806         0.7639         0.7476         0.7316
MAYOTTE ISLAND                    1.0954         1.0519         1.0299         1.0083         0.9871         0.9663         0.9459
MICRONESIA                        0.6909         0.6636         0.6494         0.6354         0.6217         0.6082         0.6949
MOLDOVA                           0.8169         0.7845         0.7678         0.7515         0.7354         0.7197         0.7042
MONACO                            0.2280         0.2171         0.2105         0.2040         0.1974         0.1909         0.1843
MONGOLIA                          1.2748         1.2241         1.1987         1.1737         1.1492         1.1252         1.1016
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 4 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
MONTSERRAT                        0.5706         0.5481         0.5362         0.5245         0.5130         0.5016         0.4905
MOROCCO                           0.4537         0.4358         0.4261         0.4166         0.4073         0.3981         0.3890
MOZAMBIQUE                        0.7476         0.7180         0.7027         0.6876         0.6729         0.6584         0.6441
MYANMAR (BURMA)                   1.6023         1.5385         1.5068         1.4757         1.4451         1.4152         1.3858
NAKHOOKA                          0.5929         0.5694         0.5571         0.5450         0.5330         0.5213         0.5098
NAMIBIA                           0.7770         0.7462         0.7303         0.7147         0.6994         0.6843         0.6696
NAURU                             0.9273         0.8905         0.8717         0.8533         0.8352         0.8174         0.8000
NEPAL                             1.0036         0.9638         0.9435         0.9234         0.9042         0.8851         0.8663
NETHERLANDS                       0.1876         0.1767         0.1701         0.1636         0.1570         0.1505         0.1439
NETHERLANDS ANTILLES              0.3490         0.3354         0.3277         0.3201         0.3127         0.3054         0.2982
NEW CALEDONIA                     0.8696         0.8351         0.8175         0.8001         0.7831         0.7664         0.7500
NEW ZEALAND                       0.1990         0.1881         0.1815         0.1750         0.1684         0.1619         0.1553
NICARAGUA                         0.6379         0.6127         0.5995         0.5865         0.5738         0.5612         0.5489
NIGER                             0.9291         0.8922         0.8734         0.8549         0.8368         0.8190         0.8016
NIGERIA                           0.7753         0.7423         0.7270         0.7080         0.6940         0.6807         0.6673
NIUE ISLAND                       1.1849         1.1378         1.1141         1.0908         1.0680         1.0456         1.0236
NORFOLK ISLAND                    0.6122         0.5857         0.5735         0.5575         0.5466         0.5362         0.5257
NORTH KOREA                       0.9755         0.9345         0.9153         0.8925         0.8749         0.8580         0.8410
NORWAY                            0.1479         0.1369         0.1304         0.1239         0.1173         0.1108         0.1042
OMAN                              0.8946         0.8591         0.8410         0.8232         0.8057         0.7885         0.7717
PAKISTAN                          1.1716         1.1250         1.1015         1.0785         1.0559         1.0338         1.0120
PALAU                             0.9076         0.8716         0.8532         0.8352         0.8174         0.8000         0.7829
PANAMA                            0.6013         0.5776         0.5651         0.5528         0.5407         0.5288         0.5172
PAPUA NEW GUINEA                  0.5259         0.5051         0.4941         0.4832         0.4725         0.4620         0.4517
PARAGUAY                          0.8084         0.7763         0.7599         0.7437         0.7278         0.7122         0.6968
PERU                              0.6018         0.5780         0.5655         0.5532         0.5411         0.5292         0.5175
PHILIPPINES                       0.5467         0.5252         0.5137         0.5024         0.4914         0.4805         0.4698
POLAND                            0.3785         0.3637         0.3554         0.3473         0.3394         0.3315         0.3238
PORTUGAL                          0.3548         0.3409         0.3331         0.3255         0.3179         0.3105         0.3032
QATAR                             0.8785         0.8436         0.8258         0.8083         0.7911         0.7743         0.7577
REUNION ISLAND                    0.6907         0.6633         0.6491         0.6351         0.6214         0.6079         0.5947
ROMANIA                           0.5242         0.5035         0.4925         0.4816         0.4710         0.4605         0.4502
RUSSIA                            0.5826         0.5596         0.5475         0.5355         0.5238         0.5123         0.5009
RWANDA                            0.8711         0.8366         0.8189         0.8015         0.7845         0.7677         0.7513
SAIPAN                            0.4669         0.4462         0.4368         0.4236         0.4153         0.4076         0.3996
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 5 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
SAKAHLIN                          0.5967         0.5731         0.5607         0.5485         0.5365         0.5247         0.5132
SAN MARINO                        0.4385         0.4212         0.4118         0.4026         0.3935         0.3846         0.3758
SAO TOME                          1.1247         1.0800         1.0575         1.0353         1.0136         0.9923         0.9714
SAUDI ARABIA                      0.8415         0.8081         0.7910         0.7742         0.7577         0.7415         0.7256
SENEGAL REPUBLIC                  1.5667         1.5043         1.4732         1.4428         1.4129         1.3836         1.3548
SEYCHELLES                        1.4289         1.3720         1.3436         1.3158         1.2884         1.2616         1.2353
SIERRA LEONE                      0.9024         0.8666         0.8483         0.8303         0.8127         0.7954         0.7784
SINGAPORE                         0.3092         0.2971         0.2902         0.2834         0.2768         0.2702         0.2636
SLOVAKIA                          0.3798         0.3649         0.3566         0.3485         0.3405         0.3327         0.3249
SLOVENIA, REPUBLIC OF             0.4143         0.3980         0.3891         0.3803         0.3717         0.3632         0.3548
SOLOMON ISLANDS                   1.0099         0.9698         0.9494         0.9294         0.9098         0.8906         0.8717
SOMALIA                           1.6425         1.5748         1.5428         1.5075         1.4775         1.4486         1.4198
SOUTH AFRICA                      0.5432         0.5218         0.5104         0.4992         0.4882         0.4774         0.4667
SOUTH KOREA                       0.4648         0.4465         0.4366         0.4269         0.4173         0.4079         0.3987
SPAIN                             0.3078         0.2958         0.2889         0.2822         0.2755         0.2689         0.2624
SRI LANKA                         0.9365         0.8984         0.8795         0.8609         0.8427         0.8248         0.8072
ST HELENA                         1.1858         1.1364         1.1132         1.0864         1.0649         1.0442         1.0235
ST KITTS & NEVIS                  0.4851         0.4660         0.4557         0.4456         0.4357         0.4259         0.4163
ST LUCIA                          0.5367         0.5132         0.5025         0.4879         0.4784         0.4694         0.4602
ST PIERRE/MIQUELON                0.4274         0.4106         0.4014         0.3924         0.3835         0.3748         0.3662
ST VINCENT/GRENADINES             0.6330         0.6057         0.5931         0.5767         0.5654         0.5547         0.5438
SUDAN                             0.6155         0.5912         0.5784         0.5658         0.5535         0.5414         0.5295
SURINAME                          1.1291         1.0842         1.0616         1.0394         1.0176         0.9962         0.9752
SWAZILAND                         0.5858         0.5626         0.5504         0.5384         0.5267         0.5151         0.5037
SWEDEN                            0.1423         0.1314         0.1248         0.1183         0.1117         0.1052         0.0986
SWITZERLAND                       0.1931         0.1822         0.1756         0.1691         0.1625         0.1560         0.1494
SYRIA                             1.0480         0.9995         0.9785         0.9580         0.9378         0.9180         0.8985
TAIWAN                            0.4812         0.4623         0.4521         0.4420         0.4322         0.4225         0.4129
TAJIKISTAN                        0.9496         0.9096         0.8910         0.8687         0.8515         0.8350         0.8186
TANZANIA                          0.7919         0.7605         0.7443         0.7284         0.7128         0.6975         0.6825
THAILAND                          0.7138         0.6832         0.6691         0.6512         0.6384         0.6262         0.6139
TOGO                              0.8774         0.8403         0.8231         0.8021         0.7863         0.7711         0.7559
TONGA ISLANDS                     0.9336         0.8965         0.8777         0.8591         0.8409         0.8230         0.8055
TRINIDAD/TOBAGO                   0.6786         0.6517         0.6377         0.6240         0.6105         0.5972         0.5842
TUNISIA                           0.5082         0.4881         0.4774         0.4669         0.4565         0.4463         0.4363
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 6 of 7

<PAGE>

                                   SCHEDULE 5

                 WORLDCOM CLASSIC DEDICATED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC
                               DEDICATED     DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED      DEDICATED
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
TURKEY                            0.4746         0.4559         0.4468         0.4359         0.4261         0.4166         0.4072
TURKMENISTAN                      0.9030         0.8672         0.8489         0.8309         0.8133         0.7959         0.7789
TURKS AND CAICOS IS.              0.5253         0.5045         0.4935         0.4826         0.4720         0.4615         0.4512
TUVALU                            0.9628         0.9246         0.9051         0.8860         0.8673         0.8489         0.8308
UGANDA                            0.6219         0.5974         0.5844         0.5718         0.5593         0.5471         0.5351
UKRAINE                           0.5129         0.4927         0.4818         0.4712         0.4608         0.4505         0.4404
UNITED ARAB EMIRATES              0.6262         0.6014         0.5885         0.5757         0.5632         0.5508         0.5387
UNITED KINGDOM                    0.1200         0.1100         0.1050         0.1000         0.0950         0.0900         0.0850
URUGUAY                           0.7644         0.7341         0.7184         0.7031         0.6880         0.6732         0.6586
UZBEKISTAN                        0.7926         0.7612         0.7450         0.7291         0.7135         0.6982         0.6832
VANUATU                           1.2982         1.2466         1.2207         1.1953         1.1704         1.1459         1.1219
VATICAN CITY                      0.3323         0.3193         0.3120         0.3047         0.2976         0.2906         0.2837
VENEZUELA                         0.3782         0.3633         0.3551         0.3470         0.3391         0.3312         0.3235
VIETMAN                           1.0817         1.0387         1.0170         0.9956         0.9747         0.9542         0.9340
WALLIS & FUTUNA                   0.3949         0.3771         0.3691         0.3572         0.3506         0.3438         0.3372
WESTERN SAMOA                     0.9329         0.8936         0.8752         0.8532         0.8363         0.8202         0.8040
YEMEN ARAB REPUBLIC               0.8666         0.8322         0.8146         0.7973         0.7804         0.7637         0.7474
YUGOSLAVIA, FEDERAL REP.          0.4353         0.4182         0.4089         0.3997         0.3907         0.3818         0.3731
ZAIRE                             0.5464         0.5225         0.5116         0.4969         0.4872         0.4780         0.4686
ZAMBIA                            0.7395         0.7080         0.6933         0.6750         0.6617         0.6490         0.6362
ZIMBABWE                          0.6195         0.5950         0.5822         0.5695         0.5571         0.5449         0.5329
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 7 of 7

<PAGE>

                                  SCHEDULE 6

                  WORLDCOM CLASSIC ENHANCED TRAVEL CARD PRICING

               ORIGINATION FROM U.S. TO LISTED TERMINATING LOCATIONS

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                                          P.R. &
       ENHANCED FEATURE                U.S.        OVERSEAS        CANADA        MEXICO          ALASKA       HAWAII     U.S.V.I.
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>          <C>             <C>          <C>              <C>          <C>          <C>
Basic Calling per min. (day/non)   $.160/$.145     WUISARS*     $.160/$.145     WUMSARS**     $.160/$.145  $.160/$.145  $.160/$.145
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         $.70            $.25         $0.70            $.25         $.25         $.25
===================================================================================================================================
Conf. Calling per min (day/non)    $.360/$.265  WUISARS+20/.12  $.490/$.350  WUMSARS+.20/.12  $.360/$.265  $.360/$.265  $.360/$.265
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                    $1.40        $1.40           $1.40         $1.40           $1.40        $1.40        $1.40
===================================================================================================================================
 Directory Assistance per call         $.400         N/A             N/A           N/A            $.400        $.400        $.400
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             $.25         $.25         $.25
===================================================================================================================================
Message store & forward per msg.       $.920         N/A             N/A           N/A            $.920        $.920        $.920
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             $.25         $.25         $.25
===================================================================================================================================
      Audio Text per min.              $.300         N/A             N/A           N/A             N/A          N/A          N/A
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             N/A          N/A          N/A
===================================================================================================================================
 Operator Services per call****    $1.25/$2.35    $1.25/$4.20   $1.25/$2.35    $1.25/$2.35    $1.25/$2.35  $1.25/$2.35  $1.25/$2.35
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         $.70            $.25          $.70            $.25         $.25         $.25
===================================================================================================================================
</TABLE>

         ORIGINATION FROM LISTED LOCATIONS AND TERMINATING IN THE U.S.

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                                                          P.R. &
       ENHANCED FEATURE                U.S.        OVERSEAS        CANADA        MEXICO          ALASKA       HAWAII     U.S.V.I.
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>          <C>             <C>          <C>              <C>          <C>          <C>
Basic Calling per min. (day/non)   $.160/$.145     IOR***           $.327          N/A         $.271/$.259  $.160/$.145  $.162/$.150
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                    $.25         $1.40           $1.40          N/A            $.25         $.25         $.25
===================================================================================================================================
Conf. Calling per min (day/non)    $.360/$.265       N/A             N/A           N/A             N/A          N/A          N/A
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                    $ .25         N/A             N/A           N/A             N/A          N/A          N/A
===================================================================================================================================
 Directory Assistance per call         $.400         N/A             N/A           N/A             N/A          N/A          N/A
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             N/A          N/A          N/A
===================================================================================================================================
Message store & forward per msg.       $.920         N/A             N/A           N/A             N/A          N/A          N/A
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             N/A          N/A          N/A
===================================================================================================================================
      Audio Text per min.              $.300         N/A             N/A           N/A             N/A          N/A          N/A
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25         N/A             N/A           N/A             N/A          N/A          N/A
===================================================================================================================================
 Operator Services per call****    $1.25/$2.35    $1.25/$4.20   $1.25/$2.35        N/A        $1.25/$2.35  $1.25/$2.35  $1.25/$2.35
-----------------------------------------------------------------------------------------------------------------------------------
          Surcharge                     $.25        $1.40           $1.40          N/A             $.25         $.25         $.25
===================================================================================================================================
</TABLE>

                            WorldCom - PROPRIETARY
                  Not for use or disclosure outside Worldcom
                        except under written agreement
8/30/96                                                                       1

<PAGE>

                                  SCHEDULE 6

                  WORLDCOM CLASSIC ENHANCED TRAVEL CARD PRICING

                  INTERNATIONAL ORIGINATION FOR U.S. TERMINATION

<TABLE>
<CAPTION>
------------------------------------------------------------------
INTERNATIONAL                                         TOLL FREE
ORIGINATION                DAY        NON-DAY         ACCESS #
------------------------------------------------------------------
<S>                    <C>          <C>           <C>
   Canada                 0.327        0.327        800-740-5131
------------------------------------------------------------------
   Mexico                    Not Applicable
------------------------------------------------------------------
  Australia               1.96         0.91        1-800-122-234
------------------------------------------------------------------
   France                1.049         1.02           0591-5009
------------------------------------------------------------------
   Germany               1.049        1.023         0130-82-7170
------------------------------------------------------------------
  Hong Kong             1.0299       1.0299          0-800-8692
------------------------------------------------------------------
    Israel               1.978         1.25         177-102-3231
------------------------------------------------------------------
    Italy               0.7169       0.7169          1878-72-810
------------------------------------------------------------------
    Japan                 1.96         1.02          0031-15-1500
------------------------------------------------------------------
    Korea                2.259        1.218        0078-18-800-0008
------------------------------------------------------------------
 Netherlands            0.6984       0.6984          06-022-7118
------------------------------------------------------------------
 Switzerland             1.157        $1.02           155-7410
------------------------------------------------------------------
United Kingdom           1.157       $0.857         0-800-96-3658
------------------------------------------------------------------
</TABLE>

N/A - Service not available
* WIIMax Universal International Switched Access Rate Schedule
** WIIMax Universal Mexico Switched Access Rate Schedule
*** International Origination Rates
**** Operator Services charges are expressed as Station-Station/Person-Person

Note: Intrastate rates are at the WIIMax Universal Intrastate Switched Access
      Rate Schedule
      Intrastate conference calling rates are at the WIIMax Universal
      Intrastate Switched Access Rate Schedule plus $.20/$.12

<TABLE>
<CAPTION>
-----------------------------------------
          BILLING INCREMENTS
-----------------------------------------
<S>                              <C>
Domestic to Domestic               60/6
Domestic to Canada, Int'l          60/6
Domestic to Mexico                60/60
International to Domestic         60/60
</TABLE>

                            WorldCom - PROPRIETARY
                  Not for use or disclosure outside Worldcom
                        except under written agreement
8/30/96                                                                        2

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
AFGHANISTAN                       1.2676         1.2171         1.1933         1.1661         1.1441         1.1229         1.1017
ALBANIA                           0.4766         0.4601         0.4510         0.4421         0.4333         0.4247         0.4162
ALGERIA                           0.4980         0.4805         0.4710         0.4617         0.4526         0.4436         0.4347
AMERICAN SAMOA                    0.5675         0.5473         0.5365         0.5259         0.5155         0.5052         0.4951
ANDORRA                           0.3443         0.3331         0.3265         0.3200         0.3134         0.3069         0.3003
ANGOLA                            0.7492         0.7218         0.7075         0.6934         0.6796         0.6661         0.6528
ANGUILLA                          0.6759         0.6513         0.6385         0.6258         0.6134         0.6012         0.5891
ANTARCTICA                        0.6914         0.6662         0.6530         0.6401         0.6274         0.6149         0.6026
ANTARCTICA (SCOTT BASE)           0.6914         0.6662         0.6530         0.6401         0.6274         0.6149         0.6026
ANTIGUA (BARBUDA)                 0.5198         0.5014         0.4916         0.4818         0.4723         0.4629         0.4537
ARGENTINA                         0.6315         0.6088         0.5967         0.5849         0.5733         0.5619         0.5507
ARMENIA                           0.9015         0.8679         0.8507         0.8338         0.8172         0.8009         0.7849
ARUBA                             0.4486         0.4332         0.4276         0.4163         0.4080         0.3999         0.3919
ASCENSION ISLAND                  0.8519         0.8203         0.8040         0.7880         0.7724         0.7570         0.7418
AUSTRALIA                         0.2512         0.2376         0.2314         0.2212         0.2158         0.2108         0.2054
AUSTRIA                           0.3101         0.2992         0.2926         0.2861         0.2795         0.2730         0.2664
AZERBAIJAN                        0.8404         0.8070         0.7915         0.7723         0.7581         0.7446         0.7310
BAHAMAS                           0.2940         0.2831         0.2766         0.2700         0.2635         0.2569         0.2504
BAHRAIN                           0.8271         0.7965         0.7807         0.7652         0.7500         0.7350         0.7203
BANGLADESH                        1.3043         1.2523         1.2279         1.2000         1.1773         1.1554         1.1336
BARBADOS                          0.6233         0.6009         0.5890         0.5773         0.5659         0.5546         0.5435
BELARUS                           0.5635         0.5435         0.5327         0.5222         0.5118         0.5016         0.4916
BELGIUM                           0.2655         0.2546         0.2480         0.2415         0.2349         0.2284         0.2218
BELIZE                            0.8385         0.8075         0.7915         0.7757         0.7603         0.7451         0.7303
BENIN                             0.6748         0.6503         0.6374         0.6248         0.6123         0.6001         0.5882
BERMUDA                           0.2889         0.2779         0.2714         0.2649         0.2583         0.2518         0.2452
BHUTAN                            0.9628         0.9287         0.9083         0.8903         0.8726         0.8552         0.8381
BOLIVIA                           0.6885         0.6634         0.6503         0.6374         0.6247         0.6123         0.6000
BOSNIA & HERZEGOVINA              0.5775         0.5569         0.5459         0.5351         0.5244         0.5140         0.5037
BOTSWANA                          0.8209         0.7906         0.7749         0.7595         0.7444         0.7296         0.7150
BRAZIL                            0.5015         0.4840         0.4744         0.4650         0.4558         0.4468         0.4378
BRITISH VIRGIN ISLANDS            0.4640         0.4479         0.4391         0.4304         0.4219         0.4135         0.4052
BRUNEI                            0.5229         0.5045         0.4945         0.4848         0.4751         0.4657         0.4564
BULGARIA                          0.4614         0.4454         0.4367         0.4281         0.4196         0.4112         0.4030
BURKINA FASO                      0.7319         0.7028         0.6894         0.6722         0.6601         0.6485         0.6369
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 1 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
BURUNDI                           0.9261         0.8915         0.8739         0.8565         0.8394         0.8227         0.8063
CAMBODIA                          0.9535         0.9178         0.8996         0.8818         0.8642         0.8470         0.8300
CAMEROON                          0.9155         0.8814         0.8639         0.8467         0.8299         0.8133         0.7971
CAPE VERDE ISLANDS                0.5464         0.5248         0.5145         0.5012         0.4925         0.4843         0.4759
CAYMAN ISLANDS                    0.4864         0.4694         0.4602         0.4511         0.4421         0.4333         0.4274
CENTRAL AFRICAN REP.              1.1926         1.1474         1.1246         1.1022         1.0802         1.0587         1.0376
CHAD                              1.2220         1.1756         1.1523         1.1293         1.1068         1.0847         1.0631
CHILE                             0.3840         0.3711         0.3638         0.3567         0.3496         0.3427         0.3358
CHINA                             0.9739         0.9374         0.9188         0.9006         0.8826         0.8650         0.8477
CHRISTMAS & COCOS IS.             0.4576         0.4418         0.4331         0.4246         0.4161         0.4079         0.3997
COLOMBIA                          0.6441         0.6208         0.6085         0.5965         0.5846         0.5730         0.5615
COMOROS                           1.1504         1.1069         1.0849         1.0633         1.0421         1.0213         1.0009
CONGO                             1.0075         0.9674         0.9486         0.9263         0.9090         0.8926         0.8760
COOK ISLANDS                      1.2841         1.2352         1.2106         1.1885         1.1629         1.1397         1.1169
COSTA RICA                        0.5864         0.5654         0.5542         0.5433         0.6325         0.5219         0.5115
CROATIA, REPUBLIC OF              0.4494         0.4339         0.4254         0.4170         0.4087         0.4006         0.3926
CUBA                              0.6362         0.6109         0.5993         0.5839         0.5736         0.5638         0.5538
CYPRUS                            0.5034         0.4867         0.4761         0.4667         0.4575         0.4484         0.4394
CZECH REPUBLIC                    0.3926         0.3794         0.3720         0.3646         0.3574         0.3503         0.3433
DENMARK                           0.2396         0.2287         0.2221         0.2156         0.2090         0.2025         0.1959
DIEGO GARCIA                      1.0271         0.9885         0.9689         0.9497         0.9307         0.9122         0.8939
DJIBOUTI                          1.0256         0.9870         0.9674         0.9482         0.9293         0.9108         0.8926
DOMINICA                          0.6260         0.6034         0.5915         0.5798         0.5683         0.5570         0.5458
DOMINICAN REPUBLIC                0.3957         0.3824         0.3749         0.3675         0.3602         0.3531         0.3460
ECUADOR                           0.6865         0.6615         0.6485         0.6356         0.6320         0.6106         0.5984
EGYPT                             0.8177         0.7874         0.7718         0.7665         0.7415         0.7267         0.7122
EL SALVADOR                       0.6397         0.6166         0.6044         0.5925         0.5807         0.5691         0.5578
EQUATORIAL GUINEA                 1.4216         1.3672         1.3400         1.3134         1.2872         1.2615         1.2363
ERITREA                           1.3092         1.2593         1.2343         1.2097         1.1856         1.1619         1.1387
ESTONIA                           0.3818         0.3690         0.3618         0.3546         0.3476         0.3407         0.3339
ETHIOPIA                          1.1402         1.0971         1.0753         1.0539         1.0329         1.0123         0.9921
FAEROE ISLANDS                    0.3998         0.3863         0.3787         0.3712         0.3639         0.3566         0.3495
FALKLAND ISLANDS                  0.9399         0.9048         0.8869         0.8692         0.8519         0.8349         0.8183
FIJI ISLANDS                      1.0886         1.0476         1.0268         1.0064         0.9863         0.9666         0.9473
FINLAND                           0.2547         0.2438         0.2372         0.2307         0.2241         0.2176         0.2110
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 2 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
FRANCE                            0.2381         0.2272         0.2206         0.2141         0.2075         0.2010         0.1944
FRENCH ANTILLES                   0.5275         0.5089         0.4989         0.4890         0.4793         0.4698         0.4604
FRENCH GUIANA                     0.5520         0.5324         0.6219         0.5116         0.5015         0.4915         0.4817
FRENCH POLYNESIA                  0.7866         0.7576         0.7426         0.7279         0.7134         0.6992         0.6852
GABON                             0.9621         0.9261         0.9077         0.8897         0.8720         0.8546         0.8375
GAMBIA                            0.7164         0.6902         0.6765         0.6631         0.6499         0.6370         0.6243
GEORGIA                           0.8111         0.7812         0.7657         0.7505         0.7365         0.7209         0.7065
GERMANY                           0.2247         0.2138         0.2072         0.2007         0.1942         0.1876         0.1811
GHANA                             0.7137         0.6854         0.6723         0.6555         0.6437         0.6325         0.6211
GIBRALTAR                         0.5697         0.5494         0.5386         0.5279         0.5174         0.5071         0.4970
GREECE                            0.4514         0.4358         0.4272         0.4188         0.4105         0.4024         0.3943
GREENLAND                         0.5571         0.5351         0.5250         0.5111         0.5022         0.4938         0.4852
GRENADA                           0.6465         0.6231         0.6108         0.5987         0.5868         0.5751         0.5636
GUADELOUPE                        0.5829         0.5621         0.5510         0.5401         0.5293         0.5188         0.5085
GUAM                              0.2373         0.2264         0.2198         0.2133         0.2067         0.2002         0.1936
GUANTANAMO BAY                    0.8110         0.7810         0.7856         0.7504         0.7354         0.7208         0.7064
GUATEMALA                         0.5909         0.5698         0.5585         0.5475         0.5366         0.5259         0.5154
GUINEA                            0.7700         0.7417         0.7270         0.7125         0.6984         0.6846         0.6708
GUINEA BISSAU                     1.4708         1.4144         1.3863         1.3587         1.3316         1.3050         1.2789
GUYANA                            0.9212         0.8869         0.8693         0.8520         0.8351         0.8184         0.8021
HAITI                             0.7426         0.7164         0.7012         0.6873         0.6736         0.6602         0.6470
HONDURAS                          0.7074         0.6816         0.6681         0.6548         0.6418         0.6290         0.6165
HONG KONG                         0.5095         0.4893         0.4801         0.4671         0.4591         0.4516         0.4439
HUNGARY                           0.3605         0.3486         0.3418         0.3350         0.3284         0.3219         0.3153
ICELAND                           0.3833         0.3704         0.3632         0.3560         0.3490         0.3421         0.3352
INDIA                             0.8431         0.8119         0.7958         0.7800         0.7645         0.7492         0.7343
INDONESIA                         0.7315         0.7048         0.6908         0.6771         0.6636         0.6504         0.6374
IRAN                              1.0446         1.0053         0.9854         0.9658         0.9465         0.9277         0.9091
IRAQ                              1.3138         1.2614         1.2368         1.2087         1.1858         1.1638         1.1418
IRELAND, REPUBLIC OF              0.3145         0.3036         0.2970         0.2905         0.2839         0.2774         0.2709
ISRAEL                            0.5418         0.5226         0.5123         0.5022         0.4922         0.4824         0.4728
ITALY                             0.2852         0.2743         0.2678         0.2612         0.2547         0.2481         0.2416
IVORY COAST                       1.1562         1.1125         1.0903         1.0686         1.0474         1.0265         1.0059
JAMAICA                           0.6569         0.6331         0.6206         0.6083         0.5962         0.5844         0.5727
JAPAN                             0.3668         0.3524         0.3459         0.3356         0.3302         0.3252         0.3198
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 3 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
JORDAN                            0.8530         0.8190         0.8033         0.7838         0.7694         0.7558         0.7419
KAZAKHSTAN                        0.9963         0.9567         0.9382         0.9160         0.8990         0.8827         0.8664
KENYA                             0.8350         0.8041         0.7881         0.7725         0.7671         0.7420         0.7272
KIRIBATI                          1.1246         1.0821         1.0606         1.0395         1.0187         0.9984         0.9785
KUWAIT                            0.9122         0.8769         0.8590         0.8384         0.8229         0.9082         0.7933
KYRGYZSTAN                        1.0876         1.0466         1.0258         1.0054         0.9854         0.9657         0.9464
LAOS                              0.9922         0.9550         0.9361         0.9175         0.8992         0.8813         0.8637
LATVIA                            0.4418         0.4266         0.4183         0.4100         0.4019         0.3939         0.3860
LEBANON                           0.9444         0.9091         0.8911         0.8734         0.8560         0.8389         0.8222
LESOTHO                           0.8936         0.8603         0.8433         0.8265         0.8101         0.7939         0.7781
LIBERIA                           0.6757         0.6511         0.6383         0.6256         0.6132         0.6010         0.5890
LIBYA                             0.6123         0.5903         0.5786         0.5672         0.5559         0.5448         0.5339
LIECHTENSTEIN                     0.2618         0.2509         0.2443         0.2378         0.2312         0.2247         0.2182
LITHUANIA                         0.4991         0.4816         0.4721         0.4628         0.4536         0.4446         0.4357
LUXEMBOURG                        0.2340         0.2231         0.2165         0.2100         0.2034         0.1969         0.1903
MACAO                             0.6247         0.6022         0.5903         0.5786         0.5671         0.5558         0.5447
MACEDONIA                         0.5843         0.6634         0.5523         0.5413         0.5306         0.5200         0.5096
MADAGASCAR                        1.0977         1.0563         1.0353         1.0147         0.9945         0.9747         0.9552
MALAWI                            0.5819         0.5588         0.5483         0.5339         0.5245         0.5157         0.5067
MALAYSIA                          0.4351         0.4201         0.4119         0.4038         0.3958         0.3879         0.3802
MALDIVES                          0.8029         0.7732         0.7579         0.7429         0.7281         0.7136         0.6993
MALI REPUBLIC                     1.0142         0.9739         0.9550         0.9325         0.9152         0.8985         0.8819
MALTA                             0.3768         0.3642         0.3571         0.3501         0.3432         0.3363         0.3296
MARISAT-ATLANTIC OCEAN            6.8029         6.5333         6.4028         6.2748         6.1494         6.0265         5.9059
MARISAT-INDIAN OCEAN              6.3849         6.1297         6.0078         5.8842         5.7678         5.6542         5.5424
MARISAT-PACIFIC OCEAN             5.8683         5.6338         5.5217         5.4079         5.3010         5.1967         5.0941
MARISAT-W. ATLANTIC               6.6344         6.3692         6.2425         6.1142         5.9932         5.8751         5.7588
MARSHALL ISLANDS                  0.6105         0.5886         0.5770         0.5655         0.5543         0.5433         0.5324
MAURITANIA                        0.9739         0.9374         0.9188         0.9006         0.8826         0.8650         0.8477
MAURITIUS                         0.9034         0.8698         0.8525         0.8356         0.8189         0.8026         0.7866
MAYOTTE ISLAND                    1.1504         1.1069         1.0849         1.0633         1.0421         1.0213         1.0009
MICRONESIA                        0.7459         0.7186         0.7044         0.6904         0.6767         0.6632         0.6499
MOLDOVA                           0.8719         0.8395         0.8228         0.8065         0.7904         0.7747         0.7592
MONACO                            0.2830         0.2721         0.2655         0.2590         0.2524         0.2459         0.2393
MONGOLIA                          1.3298         1.2791         1.2537         1.2287         1.2042         1.1802         1.1566
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 4 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
MONTSERRAT                        0.6256         0.6031         0.5912         0.5795         0.5680         0.5566         0.5455
MOROCCO                           0.5087         0.4908         0.4811         0.4716         0.4623         0.4531         0.4440
MOZAMBIQUE                        0.8026         0.7730         0.7577         0.7426         0.7279         0.7134         0.6991
MYANMAR (BURMA)                   1.6573         1.5935         1.6618         1.5307         1.5001         1.4702         1.4408
NAKHODKA                          0.6479         0.6244         0.6121         0.6000         0.5880         0.5763         0.5648
NAMIBIA                           0.8320         0.8012         0.7853         0.7697         0.7544         0.7393         0.7246
NAURU                             0.9823         0.9455         0.9267         0.9083         0.8902         0.8724         0.8550
NEPAL                             1.0586         1.0188         0.9985         0.9787         0.9592         0.9401         0.9213
NETHERLANDS                       0.2426         0.2317         0.2251         0.2186         0.2120         0.2055         0.1989
NETHERLANDS ANTILLES              0.4040         0.3904         0.3827         0.3751         0.3677         0.3604         0.3532
NEW CALEDONIA                     0.9246         0.8901         0.8725         0.8551         0.8381         0.8214         0.8050
NEW ZEALAND                       0.2540         0.2431         0.2365         0.2300         0.2234         0.2169         0.2103
NICARAGUA                         0.6929         0.6677         0.6545         0.6415         0.6288         0.6162         0.6039
NIGER                             0.9841         0.9472         0.9284         0.9099         0.8918         0.8740         0.8566
NIGERIA                           0.8303         0.7973         0.7820         0.7630         0.7490         0.7357         0.7223
NIUE ISLAND                       1.2399         1.1928         1.1691         1.1458         1.1230         1.1006         1.0786
NORFOLK ISLAND                    0.6672         0.6407         0.6285         0.6125         0.6016         0.5912         0.5807
NORTH KOREA                       1.0305         0.9895         0.9703         0.9475         0.9299         0.9130         0.8960
NORWAY                            0.2029         0.1919         0.1854         0.1789         0.1723         0.1656         0.1592
OMAN                              0.9496         0.9141         0.8960         0.8782         0.8607         0.8435         0.8267
PAKISTAN                          1.2266         1.1800         1.1565         1.1335         1.1109         1.0888         1.0670
PALAU                             0.9626         0.9266         0.9082         0.8902         0.8724         0.8550         0.8379
PANAMA                            0.6563         0.6326         0.6201         0.6078         0.5957         0.5838         0.5722
PAPUA NEW GUINEA                  0.5809         0.5601         0.5491         0.5382         0.5275         0.5170         0.5067
PARAGUAY                          0.8634         0.8313         0.8149         0.7987         0.7828         0.7672         0.7518
PERU                              0.6568         0.6330         0.6205         0.6082         0.5961         0.5842         0.5725
PHILIPPINES                       0.6017         0.5802         0.5687         0.5574         0.5464         0.5355         0.5248
POLAND                            0.4335         0.4187         0.4104         0.4023         0.3944         0.3865         0.3788
PORTUGAL                          0.4098         0.3959         0.3881         0.3805         0.3729         0.3656         0.3582
QATAR                             0.9335         0.8986         0.8808         0.8633         0.8461         0.8293         0.8127
REUNION ISLAND                    0.7457         0.7183         0.7041         0.6901         0.6764         0.6629         0.6497
ROMANIA                           0.5792         0.5585         0.5475         0.5366         0.5260         0.5155         0.5052
RUSSIA                            0.6376         0.6146         0.6025         0.5905         0.5788         0.5673         0.5559
RWANDA                            0.9260         0.8916         0.8739         0.8565         0.8395         0.8227         0.8063
SAIPAN                            0.5219         0.5012         0.4918         0.4786         0.4703         0.4626         0.4546
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 5 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM MAINLAND            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
SAKAHLIN                          0.6517         0.6281         0.6157         0.6035         0.5915         0.5797         0.5682
SAN MARINO                        0.4935         0.4762         0.4668         0.4576         0.4485         0.4396         0.4308
SAO TOME                          1.1797         1.1350         1.1125         1.0903         1.0686         1.0473         1.0264
SAUDI ARABIA                      0.8965         0.8631         0.8460         0.8292         0.8127         0.7966         0.7806
SENEGAL REPUBLIC                  1.6217         1.5593         1.5282         1.4978         1.4679         1.4386         1.4098
SEYCHELLES                        1.4839         1.4270         1.3986         1.3708         1.3434         1.3166         1.2903
SIERRA LEONE                      0.9574         0.9216         0.9033         0.8853         0.8677         0.8504         0.8334
SINGAPORE                         0.3642         0.3521         0.3452         0.3384         0.3318         0.3252         0.3186
SLOVAKIA                          0.4348         0.4199         0.4116         0.4035         0.3955         0.3877         0.3799
SLOVENIA, REPUBLIC OF             0.4693         0.4530         0.4441         0.4353         0.4267         0.4182         0.4098
SOLOMON ISLANDS                   1.0649         1.0248         1.0044         0.9844         0.9648         0.9456         0.9267
SOMALIA                           1.6975         1.6298         1.5978         1.5625         1.5325         1.5036         1.4748
SOUTH AFRICA                      0.5982         0.5768         0.5664         0.5542         0.5432         0.5324         0.5217
SOUTH KOREA                       0.5198         0.5015         0.4916         0.4819         0.4723         0.4629         0.4537
SPAIN                             0.3629         0.3508         0.3439         0.3372         0.3305         0.3239         0.3174
SRI LANKA                         0.9905         0.9534         0.9345         0.9159         0.8977         0.8798         0.8622
ST HELENA                         1.2408         1.1914         1.1682         1.1414         1.1199         1.0992         1.0785
ST KITTS & NEVIS                  0.5401         0.5210         0.5107         0.5006         0.4907         0.4809         0.4713
ST LUCIA                          0.5917         0.5682         0.5575         0.5429         0.5334         0.5244         0.5152
ST PIERRE/MIQUELON                0.4824         0.4656         0.4564         0.4474         0.4385         0.4298         0.4212
ST VINCENT/GRENADINES             0.6880         0.6607         0.6481         0.6317         0.6204         0.6097         0.5988
SUDAN                             0.6705         0.6462         0.6334         0.6208         0.6085         0.5964         0.5845
SURINAME                          1.1841         1.1392         1.1166         1.0944         1.0726         1.0512         1.0302
SWAZILAND                         0.6408         0.6176         0.6054         0.5934         0.5817         0.6701         0.5587
SWEDEN                            0.1973         0.1864         0.1798         0.1733         0.1667         0.1602         0.1536
SWITZERLAND                       0.2481         0.2372         0.2306         0.2241         0.2175         0.2110         0.2044
SYRIA                             1.0958         1.0545         1.0335         1.0130         0.9928         0.9730         0.9535
TAIWAN                            0.5362         0.5173         0.5071         0.4970         0.4872         0.4775         0.4679
TAJIKISTAN                        1.0046         0.9646         0.9460         0.9237         0.9065         0.8900         0.8735
TANZANIA                          0.8469         0.8155         0.7993         0.7834         0.7678         0.7525         0.7376
THAILAND                          0.7688         0.7382         0.7241         0.7062         0.6934         0.6812         0.6689
TOGO                              0.9324         0.8953         0.8781         0.8571         0.8413         0.8261         0.8109
TONGA ISLANDS                     0.9886         0.9515         0.9327         0.9141         0.8659         0.8780         0.8605
TRINIDAD/TOBAGO                   0.7336         0.7067         0.6927         0.6790         0.6655         0.6522         0.6392
TUNISIA                           0.6632         0.5431         0.5324         0.5219         0.1150         0.5013         0.4913
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 6 of 7

<PAGE>

                                   SCHEDULE 7

                  WORLDCOM CLASSIC SWITCHED INTERNATIONAL RATES

                 1+ FROM HAWAII            BILLING INCREMENTS 1ST 30/ADDTN'L 6
<TABLE>
<CAPTION>
                               ----------------------------------------------------------------------------------------------------
                                CLASSIC       CLASSIC        CLASSIC        CLASSIC        CLASSIC        CLASSIC       CLASSIC
                               SW FROM HI    SW FROM HI    SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI     SW FROM HI
COUNTRY                           BASE       $50K INT'L    $100K INT'L    $250K INT'L    $500K INT'L    $750K INT'L   $1,000K INT'L
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>           <C>            <C>            <C>            <C>           <C>
TURKEY                            0.5296         0.5109         0.5008         0.4909         0.4811         0.4716         0.4622
TURKMENISTAN                      0.9580         0.9222         0.9039         0.8859         0.8683         0.8509         0.8339
TURKS AND CAICOS IS.              0.5803         0.5595         0.5485         0.5376         0.5270         0.5165         0.5062
TUVALU                            1.0178         0.9796         0.9601         0.9410         0.9223         0.9039         0.8858
UGANDA                            0.6769         0.6524         0.6394         0.6268         0.6143         0.6021         0.5901
UKRAINE                           0.5679         0.5477         0.5368         0.5262         0.5158         0.5055         0.4954
UNITED ARAB EMIRATES              0.6812         0.6564         0.6435         0.6307         0.6182         0.6058         0.5937
UNITED KINGDOM                    0.1750         0.1650         0.1600         0.1550         0.1500         0.1450         0.1400
URUGUAY                           0.8194         0.7891         0.7734         0.7581         0.7430         0.7282         0.7136
UZBEKISTAN                        0.8476         0.8162         0.8000         0.7841         0.7685         0.7532         0.7382
VANUATU                           1.3532         1.3016         1.2757         1.2503         1.2254         1.2009         1.1769
VATICAN CITY                      0.3876         0.3743         0.3670         0.3597         0.3526         0.3456         0.3387
VENEZUELA                         0.4332         0.4183         0.4101         0.4020         0.3941         0.3862         0.3785
VIETNAM                           1.1367         1.0937         1.0720         1.0506         1.0297         1.0092         0.8880
WALLIS & FUTUNA                   0.4499         0.4321         0.4241         0.4122         0.4053         0.3988         0.3922
WESTERN SAMOA                     0.9879         0.9486         0.9302         0.9082         0.8913         0.8752         0.8590
YEMEN ARAB REPUBLIC               0.9216         0.8872         0.8696         0.8523         0.8354         0.8187         0.8024
YUGOSLAVIA, FEDERAL REP.          0.4903         0.4732         0.4639         0.4547         0.4457         0.4368         0.4281
ZAIRE                             0.6014         0.5775         0.5666         0.5519         0.5422         0.5330         0.5236
ZAMBIA                            0.7945         0.7630         0.7483         0.7300         0.7167         0.7040         0.6912
ZIMBABWE                          0.6745         0.6500         0.6372         0.6245         0.6121         0.5999         0.5879
</TABLE>

                            WORLDCOM -- PROPRIETARY
                   Not for use or disclosure outside WorldCom
                         except under written agreement
2/1/98                                                               Page 7 of 7

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}]]