Document:

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                                                                   EXHIBIT 10.32
[MCI WORLDCOM LOGO]

                        CARRIER GLOBAL SERVICES AGREEMENT

<TABLE>
<CAPTION>
UNIVERSAL ACCESS, INC.                      MCI WORLDCOM COMMUNICATIONS, INC.
<S>                                        <C>

/s/ Robert Pommer                          /s/ Frank Glloky
-----------------------------------        -----------------------------------
Company Representative Signature           MCIWC Signature

COO                                        VP Marketing
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Title - Please Print                       Title

Company Representative Name-Please         Name
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Print

9/24/99                                    2/14/99
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Date                                       Date

-----------------------------------        -----------------------------------
Company Address (for notice purposes)      Company Address (for notice purposes)

(      )
 ------ ---------------------------        -----------------------------------
Main Telephone Number                      Billing ID
</TABLE>

This Global Services Agreement, (the "Agreement" or "GSA"), is made by and
between MCI WORLDCOM COMMUNICATIONS, INC., a Delaware corporation with offices
at 575 East Amite Street, Jackson, Mississippi 39201, ("MCI WORLDCOM") and
UNIVERSAL ACCESS, INC., a corporation with offices at 100 N. Riverside Plaza,
Suite 2200, Chicago, Illinois 60606 ("Customer"). WTI is acting on behalf of
each MCIWC affiliate (other than MCI Systemhouse) to the extent that services
referred to in this Agreement are provided by one or more such affiliates. This
Agreement incorporates by reference the attached schedules (referred to
collectively herein as the "GSA Schedules"). MCI WORLDCOM or the providing
affiliate shall provide to Customer and Customer shall purchase from MCI
WORLDCOM those service(s) and associated equipment (the "Services") described in
Schedule Three through Schedule Eight of this Agreement (the "Service
Schedules") at the rates, discounts, and other terms and conditions described in
the Service Schedule for the applicable Service. By signing this cover sheet,
MCI WORLDCOM and Customer agree to be bound to all the terms and conditions of
this Agreement.

The GSA Schedules attached to this Agreement are as follows (check appropriate
boxes):

<TABLE>
<S>            <C>                  <C>
        [x]    Schedule One         Term, Global Volumes and Discounts
        [x]    Schedule Two         Master Terms and Conditions
        [x]    Schedule Three       United States Tariffed Services
        [x]    Schedule Four        Non-Tariffed Services
</TABLE>

This Agreement shall be of no force and effect and the offer contained herein
shall be withdrawn unless this Agreement is executed by Customer and delivered
to MCI WORLDCOM on or before SEPTEMBER 30, 1999.

                           MCI WORLDCOM CONFIDENTIAL

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                                  SCHEDULE ONE
                       TERM, GLOBAL VOLUMES AND DISCOUNTS

1.  Term. The "Term" of this Agreement will begin upon the Commencement Date and
    continue for a period of sixty (60) months following the conclusion of the
    Ramp Period. The rates, charges, credits and discounts for the Services
    contained herein will be effective the first day of the second full billing
    cycle following the execution and delivery of this Agreement by Customer to
    MCI WORLDCOM (the "Services Effective Date"). The "Ramp Period" shall
    commence on the Commencement Date and continue for a period of twelve (12)
    months following the Services Effective Date. Customer will not be subject
    to any minimum usage requirements during the Ramp Period.

2.  Selected Definitions.

    2.1 "Base Rates" shall mean (i) for Services based on standard Tariff rates,
        the Tariff rates as reduced by the discounts (if any) provided to
        Customer pursuant to this Agreement; (ii) for non-Tariffed Services, the
        MCI WORLDCOM standard rates as reduced by the discounts (if any)
        provided to Customer pursuant to this Agreement; (iii) for Services as
        to which a specific rate is set forth herein, such rate; or (iv) for
        Services for which no specific rates or discounts are set forth herein,
        the rates set forth in the Tariffs following application of all
        applicable Tariffed discounts, or MCI WORLDCOM's standard rates, if no
        rate is set forth in the Tariff, following application of all applicable
        standard discounts.

    2.2 "Commencement Date" shall mean the date on which Customer signs this
        Agreement.

    2.3 "Monthly Period" shall mean the monthly billing period for Services
        under this Agreement.

    2.4 "Total Usage Charges" shall mean Customer's Usage Charges for all
        Services provided under this Agreement.

    2.5 "Tariff" shall mean the public tariffs on file with the Federal
        Communications Commission or state public utilities commissions or other
        domestic or foreign governmental bodies governing the rates and/or terms
        ands conditions of Services that are subject to tariff filings.

    2.6 "Usage Charges" shall mean Customer's recurring usage charges for one or
        more Services provided under this Agreement calculated at Base Rates.
        Usage Charges do not include the following: (i) taxes and tax related
        surcharges; (ii) charges for equipment and collocation, including
        charges for Services under Schedule Seven - Equipment; (iii) charges
        incurred where MCI WORLDCOM or an MCI WORLDCOM affiliate acts as agent
        for Customer in the acquisition of goods or services; (iv) standard
        non-recurring charges; (v) calling card surcharges (except as otherwise
        expressly provided for herein); (vi) monthly recurring non-usage
        charges; (vii) other Tariffed charges; and (viii) other charges
        expressly excluded in the applicable Schedule to the Agreement.

3.  Minimum Volume Requirement. During each Monthly Period of the Term,
    Customer's Total Usage Charges under this Agreement must equal or exceed
    Five Hundred Thousand Dollars ($500,000) (the "Monthly Minimum").

4.  Underutilization. If, in any Monthly Period, Customer's Total Usage Charges
    are less than the Monthly Minimum, then Customer will pay: (1) all accrued
    but unpaid Usage Charges and other charges incurred by Customer; and (2) an
    underutilization charge (which Customer hereby agrees is reasonable) equal
    to the difference between the Monthly Minimum and Customer's Total Usage
    Charges during such Monthly Period.

5.  Rates and Discounts for the Services. Rates and discounts for specific
    Services are provided in the applicable Service Schedule. Except as
    expressly provided to the contrary, the rates set forth are in lieu of, and
    not in

                           MCI WORLDCOM CONFIDENTIAL

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    addition to, any discounts, promotions and/or credits (Tariffed or
    otherwise). Any rates that are specifically designated as "postalized" will
    not increase or decrease during the Term. For Services not specifically set
    forth, including but not limited to, all dedicated access and egress charges
    and all other charges related to said access and egress not specifically set
    forth, Customer will be charged MCI WORLDCOM's standard rates. References in
    this Agreement to standard Tariffed rates and/or discounts refer to the
    corresponding standard rates and/or discounts set forth in the applicable
    Tariffs for such Service(s). Unless otherwise specified in this Agreement,
    the rates set forth in this Agreement do not include, and the discounts set
    forth in this Agreement do not apply to, the following: (i) access or egress
    (or related) charges imposed by third parties; (ii) standard non-recurring
    charges and monthly recurring non-usage charges; (iii) calling card
    surcharges (unless expressly provided for herein); (iv) taxes or tax-like
    surcharges; (v) other Tariffed charges; and (vi) other charges expressly
    excluded in the applicable GSA Schedule.

6.  Termination Liability. If (1) Customer terminates this Agreement during the
    Term for reasons other than (i) to take service under another arrangement
    with MCI WORLDCOM having equal or greater term and volume requirements or
    (ii) for "Cause" (as hereinafter defined), or (2) MCI WORLDCOM terminates
    this Agreement in accordance with Section 7.2(f) or (g) of Schedule Two,
    Customer will pay: (a) all accrued but unpaid Usage Charges and other
    charges incurred through the date of such termination; (b) an amount (which
    Customer hereby agrees is reasonable) equal to fifty percent (50%) of the
    aggregate of the Monthly Minimum(s) (and fifty percent (50%) of a pro rata
    portion thereof for any partial Monthly Period) that would have been
    applicable for the remaining unexpired portion of the Term on the date of
    such termination; (c) any and all credits received by Customer hereunder
    (unless otherwise specified), in full, without setoff or deduction plus (d)
    the aggregate termination charges, payable to any third party suppliers, if
    any, for which MCI WORLDCOM is or becomes contractually liable in connection
    with such termination. As used in this Agreement, "Cause" shall mean a
    failure to perform a material obligation under this Agreement which failure
    is not remedied within thirty (30) days of the defaulting party's receipt of
    written notice thereof, given by the terminating party in accordance with
    Section 12.7 of Schedule Two of this Agreement.

7.  Competitive Evaluation. If at any time beginning with the [***] month
    following the Effective Date, Customer receives a bona fide offer from
    another telecommunications company to provide a package of
    telecommunications services that is substantially similar to the range of
    MCI WORLDCOM services offered under this Agreement, including, without
    limitation, revenue commitments, term, volume, product mix, functionality,
    features, credits offered, level of service and geographic breadth (a
    "Competitive Offer"), and such Competitive Offer would result in an overall
    cost savings to Customer greater than [***] over the then remaining Term of
    this Agreement when compared to the effective rates charged by MCI WORLDCOM
    hereunder, then MCI WORLDCOM agrees to either match the Competitive Offer or
    to release Customer from this Agreement. [***] If MCI WORLDCOM does not
    elect to match the Competitive Offer within sixty (60) days after it is
    presented to MCI WORLDCOM by Customer in writing (with sufficient
    documentation of the Competitive Offer), [***] whichever is earlier, and (2)
    no termination or similar charges, including without limitation early
    termination charges contained in the Tariffs, shall be owed by Customer to
    MCI WORLDCOM.

8.  Credit Allowances for Service Interruptions.

    8.1 MCI WORLDCOM will grant a credit allowance whenever an interruption
        occurs because of a failure of any component furnished by MCI WORLDCOM
        under this Agreement. An interruption period begins when Customer
        reports a service, facility or circuit to be interrupted and releases it
        for testing and repair. An interruption period ends when the service,
        facility or circuit is operative. If Customer reports a service,
        facility or circuit to be inoperative but declines to release it for
        testing and repair, it is considered to be impaired, but not
        interrupted.

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

                           MCI WORLDCOM CONFIDENTIAL

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<PAGE>   4

    8.2 A credit allowance will be given for interruptions of fifteen (15)
        minutes or more. Credit allowances shall be calculated as follows:

        8.2.1 Interruptions of 24 Hours or Less

<TABLE>
<CAPTION>
        Length of Interruption                Interruption Period To be Credited
        ----------------------                ----------------------------------
<S>                                           <C>
        Less than 15 minutes                  [***]
        15 minutes - 2 hours, 59minutes       [***]
        3 hours - 5 hours, 59 minutes         [***]
        6 hours - 8 hours, 59 minutes         [***]
        9 hours - 11 hours, 59 minutes        [***]
        12 hours - 14 hours, 59 minutes       [***]
        15 hours  - 23 hours, 59 minutes      [***]
</TABLE>

         *Two or more interruptions of 15 minutes or more during any one 24-hour
          period shall be considered as one interruption.

        8.2.2 Interruptions Over 24 Hours and Less Than 72 Hours. [***] No more
              than one full day's credit will be allowed for any period of 24
              hours.

        8.2.2 Interruptions Over 72 Hours. [***]

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

                           MCI WORLDCOM CONFIDENTIAL

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<PAGE>   5

                                  SCHEDULE TWO
                           MASTER TERMS AND CONDITIONS

1. Services. MCI WORLDCOM shall provide to Customer the Services described in
the Service Schedules attached to the Agreement at the applicable rates,
discounts, and other terms and conditions described in the applicable Service
Schedule. Certain Services are provided by MCI WORLDCOM to Customer pursuant to
a Tariff filed by MCI WORLDCOM in the local jurisdiction where such Service is
provided ("Tariffed Services"). This Agreement incorporates by reference the
terms of each such Tariff as they apply to such Tariffed Services. For Tariffed
Services, in the event of conflict between the terms of the applicable Tariff
and this Agreement, the order of precedence shall be: the applicable Service
Schedule, this Schedule Two, and then the applicable Tariff. For Services not
provided by MCI WORLDCOM pursuant to a Tariff, such Services shall be provided
in accordance with the terms and conditions of this Agreement. To the extent
that such terms and conditions are not provided in this Agreement, the terms and
conditions set forth in the US Tariff (as defined in Schedule Three) shall be
incorporated herein with respect to such Service if there is a US Tariffed
Service that corresponds to the non-Tariffed Service to the extent permissible
and not superseded by applicable local law and regulations. Customer is a resale
common carrier subject to the Communications Act of 1934, as amended. The
Agreement is entered into pursuant to Section 211 of the Communications Act of
1934, as amended. For non-Tariffed Services, in the event of conflict between
this Agreement and the US Tariff, the order of precedence shall be: the
applicable Service Schedule, this Schedule Two, and then the applicable US
Tariff. Notwithstanding anything in this Agreement to the contrary, MCI WORLDCOM
may adjust its rates or charges, or impose additional rates and charges, in
order to recover amounts it may be required by governmental or
quasi-governmental authorities to collect from or pay to others to support
statutory or regulatory programs during the course of this Agreement.

     1.1 Detariffing. If, prior to the expiration of the Term of this Agreement,
MCI WORLDCOM voluntarily or involuntarily, as a result of government or judicial
action, cancels, in whole or in part, any Tariff on file, where the affected
provisions prior to such cancellation applied to any service(s) MCI WORLDCOM
provides under this Agreement, then effective on such cancellation and for the
remainder of the Term, this Agreement shall consist of the following, in order
of precedence from (a) through (c):

     (a) MCI WORLDCOM Tariff provisions that remain in effect ("Effective
Tariffs"), as MCI WORLDCOM may amend from time to time in accordance with law;
and

     (b) Specific provisions contained in this Agreement that expressly apply in
lieu of, or that apply in addition to, provisions contained in Effective Tariffs
and/or in MCI WORLDCOM's standard Guide to Services and Pricing ("Price Guide");
and

     (c) Provisions contained in the Price Guide to the extent that (a) and (b)
above are not applicable. MCI WORLDCOM may amend the Price Guide from time to
time and will maintain the Price Guide open for public inspection at one or more
offices during normal business hours. Immediately prior to the cancellation of
any Tariff provisions applicable to service(s) provided under this Agreement,
MCI WORLDCOM shall incorporate such provisions into the Price Guide and if MCI
WORLDCOM fails to incorporate any such provisions, such provisions shall be
deemed incorporated into this Agreement as if MCI WORLDCOM had so incorporated
such provisions in the Price Guide.

     In all events, the applicable rates and rate schedules shall continue to be
subject to any discounts, waivers, credits, or restrictions on rate changes that
may be contained in this Agreement for Tariffed Services. Where rate and/or
discount adjustments would have been made by reference to any canceled Tariff
rate, rate schedule, discount and/or discount schedule, these adjustments shall
instead be made by reference to the Price Guide. To the extent that any
adjustment to Tariffed rates, rate schedules, discounts and/or discount
schedules is permitted under this Agreement, such adjustment may be made by MCI
WORLDCOM to its Price Guide.

     1.2 Effect of Tariffing. If, at any time during the Term, MCI WORLDCOM
tariffs any of the non-Tariffed Services provided to Customer under this
Agreement (each a "Newly Tariffed Service"), Customer agrees that the Tariff
shall govern with respect to the Newly Tariffed Service and to incorporate such
Newly Tariffed Service into the appropriate Service Schedule. Such Service
Schedule shall contain the same rates, charges, discounts, term commitment, and
volume commitment for the Newly Tariffed Service as set forth herein.

2. Payment of MCI WORLDCOM Invoices. Unless otherwise specified in an GSA
Schedule attached hereto, all amounts due for Services shall be billed in U.S.
Dollars. Customer is required to pay MCI WORLDCOM for Services, including any
applicable underutilization charges and/or early termination charges, within
thirty (30) days after the date of MCI WORLDCOM's invoice. Amounts not paid
within thirty (30) days after the date of the invoice will be considered past
due and a failure to perform a material obligation under this Agreement, and MCI
WORLDCOM may terminate this Agreement or the applicable GSA Schedule immediately
upon written notice of any sum past due or pursuant to the terms of any
applicable Tariff. Independent of such payment obligations, Customer shall make
a separate claim in writing, with adequate support, for any credit for service
interruption to which Customer believes itself entitled hereunder, and MCI
WORLDCOM and Customer will promptly address such claim. If Customer does not
give MCI WORLDCOM written notice of a dispute with respect to any charges within
six (6) months of the date an invoice was rendered, such invoice shall be deemed
to be correct and binding. Failure of MCI WORLDCOM to invoice Customer in a
timely manner for any amounts due hereunder shall not be deemed a waiver by MCI
WORLDCOM of its rights to payment therefor. Where an element of a Service is
considered to be rendered directly from a third party carrier to Customer and
where said carrier does not have a one-stop billing arrangement with MCI
WORLDCOM that allows MCI WORLDCOM to bill Customer on behalf of such third
party, Customer agrees to pay for said element directly to such third party
carrier.

3. Taxes and Access Charges.

     3.1 Domestic and International Taxes

                           MCI WORLDCOM CONFIDENTIAL

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<PAGE>   6

     (a) All charges are exclusive of federal, state, local, and foreign sales,
use, excise, utility, gross receipts, value added taxes (VAT), other similar
tax-like charges and tax-related surcharges as provided in MCI WORLDCOM's F.C.C.
and state tariffs, and other similar tax-like charges levied by any duly
constituted authority, which Customer agrees to pay.

     (b) In the event that Customer provides MCI WORLDCOM with a duly authorized
exemption certificate, MCI WORLDCOM agrees to exempt Customer from such taxes if
and as provided by applicable law, effective on the date the exemption
certificate is received by MCI WORLDCOM.

     (c) Taxes based on MCI WORLDCOM's net income shall be the sole
responsibility of MCI WORLDCOM; provided that, if Customer is required by the
laws of any foreign tax jurisdiction to withhold income or profits taxes from
any payment, Customer shall, within 90 days of the date of such withholding,
provide to MCI WORLDCOM official tax certificates documenting remittance of such
taxes to the relevant tax authorities. Such tax certificates shall be in a form
sufficient under the U.S. Internal Revenue Code to document the qualification of
such income or profits tax for the foreign tax credit allowable against MCI
WORLDCOM's U.S. corporation income tax, and shall be accompanied by an English
translation. Upon receipt of such certificates, MCI WORLDCOM will issue Customer
a billing credit for the amounts represented thereby.

     3.2 Pass-Through Charges. Unless otherwise provided for in the applicable
product description contained in a GSA Schedule, MCI WORLDCOM will pass through
to Customer, and Customer shall be solely responsible for, any charges
(including, without limitation, installation charges), fees, taxes and terms and
conditions of service imposed by domestic and international access/egress
service suppliers in relation to the provision of Services, including, but not
limited to, rate fluctuations in tariffs, communications charges and access
charges that are imposed or enacted by access suppliers after the Service
Effective Date. Customer shall be responsible for any gains or losses associated
with fluctuations in the exchange rate and/or timing of payment where access
charges are billed in non-U.S. currency and are to be paid by Customers in U.S.
Dollars.

4. Customer Obligations. In addition to the other obligations of Customer
contained in this Agreement, including, but not limited to, any specific
Customer obligations contained in a GSA Schedule, Customer shall be responsible
for the following obligations.

     4.1 Customer-Obtained Facilities. Customer is responsible for obtaining,
installing, and maintaining all equipment, software, wiring, power sources,
telephone connections and/or communications services necessary for
inter-connection with MCI WORLDCOM's network or otherwise for use in conjunction
with the applicable Services ("Facilities"). Customer is responsible for
ensuring that such Facilities are compatible with MCI WORLDCOM's requirements
and that they continue to be compatible with subsequent revision levels of MCI
WORLDCOM-provided equipment, software and services. MCI WORLDCOM is not
responsible for the availability, capacity and/or condition of any Facilities
not provided by MCI WORLDCOM. The Customer shall obtain and hereby grants to MCI
WORLDCOM all licenses, waivers, consents, or registrations necessary to deliver,
install, and keep installed at the Customer site the MCI WORLDCOM equipment.

     4.2 Security. Customer shall, at its own expense, take all reasonable
physical and information systems security measures necessary to protect all
equipment, software, data and systems located on Customer's premises or
otherwise in Customer's control and used in connection with the Services,
whether owned by Customer, MCI WORLDCOM, or MCI WORLDCOM's subcontractors.
Customer acknowledges and agrees that MCI WORLDCOM is not liable, either in
contract or in tort, for any loss resulting from any unauthorized access to or
alteration of, theft, destruction, corruption, or use of, Facilities used in
connection with the Services.

     4.3 Customer Sites. Customer agrees to provide MCI WORLDCOM and its
subcontractors and their respective employees and agents access to Customer's
sites where any Services are provided (including access to associated equipment)
as necessary for MCI WORLDCOM and its subcontractors to perform the Services.

5. Software and Documentation. Software and related documentation provided by
MCI WORLDCOM to Customer in connection with the Services and not otherwise
subject to either a separate written agreement executed between MCI WORLDCOM and
Customer or to an accompanying shrink wrap license (collectively the "Software")
is subject to the following:

     (a) In consideration for payment of any applicable fees, Customer is
granted a personal, non-exclusive, non-transferable license to use the Software,
in object code form only, solely in connection with the Services for Customer's
internal business purposes on Customer-owned or Customer-leased equipment (the
"License"). Customer shall not use the Software (i) in connection with the
products and/or services of any third party, or (ii) to provide services for the
benefit of any third party, including without limitation as a service bureau.

     (b) Customer may make one copy of the Software, other than the
documentation, for archival or back-up purposes only, provided that any
copyright and other proprietary rights notices are reproduced on such copy.
Customer shall not make any copies of documentation provided as part of the
Software.

     (c) Customer shall not: (i) attempt to reverse engineer, decompile,
disassemble or otherwise translate or modify the Software in any manner; or (ii)
sell, assign, license, sublicense or otherwise transfer, transmit or convey
Software, or any copies or modifications thereof, or any interest therein, to
any third party.

     (d) All rights in the Software, including without limitation any patents,
copyrights and any other intellectual property rights therein, shall remain the
exclusive property of MCI WORLDCOM and/or its licensors. Customer agrees that
the Software is the proprietary and confidential information of MCI WORLDCOM
and/or its licensors subject to the provisions of Section 6 ("Confidential
Information") below.

     (e) Except to the extent otherwise expressly agreed by the parties in
writing, MCI WORLDCOM has no obligation to provide maintenance or other support
of any kind for the Software, including without limitation any error
corrections, updates, enhancements or other modifications.

     (f) The License shall immediately terminate upon the earlier of: (i)
termination or expiration of this Agreement; (ii) termination of the Service(s)
with which the Software is intended

                           MCI WORLDCOM CONFIDENTIAL

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<PAGE>   7

for use; or (iii) failure of Customer to comply with any provisions of this
Section. Upon termination of any License, at MCI WORLDCOM's option, Customer
shall promptly either (i) destroy all copies of the Software in its possession,
or (ii) return all such copies to MCI WORLDCOM, and in either event provide a
written officer's certification confirming the same.

6. Confidential Information.

     6.1 Obligations. The recipient party shall protect all information received
from the disclosing party or otherwise discovered by the recipient party during
the course of this Agreement, including without limitation all information
relating to the other party's technology, research and development, business
affairs, pricing, the terms of this Agreement, or such information of the other
party that may be reasonably understood from legends, the nature of such
information itself and/or the circumstances of such information's disclosure, to
be confidential and/or proprietary to the owning party or to third parties to
which a party owes a duty of non-disclosure (collectively the "Confidential
Information") from disclosure to others, using the same degree of care used to
protect it's own proprietary information of like importance, but in any case
using no less than a reasonable degree of care, and shall further use such
Confidential Information only for the purpose of this Agreement. Confidential
Information may be disclosed in written or other tangible form (including on
magnetic media) or by oral, visual or other means. Except as otherwise provided
in Section 5 ("Software and Documentation"), the recipient party may make such
copies of Confidential Information in tangible form as are reasonably required
in connection with its use as permitted under this paragraph.

     6.2 Exceptions. The foregoing restrictions on use and disclosure of
Confidential Information do not apply to information that: (i) is publicly known
at the time of the owning party's communication thereof to the recipient party;
(ii) is, or becomes publicly known, through no fault of the recipient party
subsequent to the time of owning party's communication thereof to the recipient
party; (iii) is received by the recipient party free of any obligation of
confidence prior to the time such information is received by the recipient
party; provided however, that the recipient party immediately informs the owning
party in writing to establish the recipient party's prior possession; (iv) is
developed independently by the recipient party independently of, and without
reference to, the Confidential Information or other information of the owning
party; (v) is rightfully obtained by the recipient party from third parties
authorized to make such disclosure without restriction; or (vi) is identified in
writing by the owning party as no longer proprietary or confidential.

     6.3 Required Disclosures. In the event a party is required by law,
regulation or court order to disclose any Confidential Information, the party
required to make such disclosure will promptly notify the owning party in
writing prior to making any such disclosure in order to facilitate the owning
party seeking a protective order or other appropriate remedy from the
appropriate body. Each party agrees to cooperate with the other party in seeking
such order or other remedy. Additionally, if the owning party is not successful
in precluding the requesting legal body from requiring the disclosure of the
Confidential Information, the party required to make such disclosure will
furnish only that portion of the Confidential Information which is legally
required and will exercise all reasonable efforts to obtain reliable assurances
that confidential treatment will be accorded the Confidential Information.

     6.4 Destruction of Information. At the owning party's option, the recipient
party shall promptly either destroy all Confidential Information in tangible
form in its possession, or return all such copies to the owning party, and in
either event provide a written officer's certification confirming the same,
promptly upon the earlier of: (i) the owning party's written request; or (ii)
the expiration or earlier termination of this Agreement.

     6.5 Remedies. The parties acknowledge that Confidential Information is
unique and valuable to the owning party, and that disclosure in breach of this
Agreement will result in irreparable injury to the owning party for which
monetary damages alone would not be an adequate remedy. Therefore, Customer
agrees that in the event of a breach or threatened breach of confidentiality,
the owning party shall be entitled to specific performance and injunctive or
other equitable relief as a remedy for any such breach or anticipated breach
without the necessity of posting a bond. Any such relief shall be in addition to
and not in lieu of any appropriate relief in the way of monetary damages.

7. Termination.

     7.1 Discontinuation of Business. Either party may terminate this Agreement
immediately upon written notice to the other party if such other party
dissolves, discontinues or terminates its business operations to which this
Agreement pertains or such other party makes any assignment for the benefit of
creditors.

     7.2 Termination by MCI WORLDCOM. MCI WORLDCOM may terminate this Agreement
(or the applicable portion thereof) immediately upon notice to Customer if (a)
MCI WORLDCOM is unable to obtain or maintain any U.S. or foreign governmental
license, waiver, consent, registration or approval needed to provide any
facility or Service hereunder; (b) the continued provision of a facility or
Service would contravene any local, state, national, foreign or international
regulation, law, or tariff or violate any policy of any MCI WORLDCOM
correspondent or interconnected carrier; (c) interruption or termination of a
Service is necessary to prevent or protect against fraud or otherwise protect
MCI WORLDCOM's personnel, agents, facilities, or services; (d) MCI WORLDCOM is
unable to continue to provide a third-party subcontractor's, vendor's or
interconnected carrier's facility, component of equipment, or service for any
reason, provided, however, that where such third party has ceased to provide any
facility, equipment, or service, MCI WORLDCOM will exercise commercially
reasonable efforts to continue to provide to Customer a comparable facility,
equipment, or service by or through another vendor under comparable terms and
conditions; (e) MCI WORLDCOM discovers that Customer provided false information
to MCI WORLDCOM regarding Customer's identity, credit-worthiness, or its planned
use of the Service(s); (f) Customer fails to perform a material obligation under
this Agreement, other than non-payment of Service, which failure is not remedied
within thirty (30) days of Customer's receipt of written notice thereof; or (g)
Customer fails to pay an invoice for Services under this Agreement within thirty
(30) days after Customer's receipt of MCI WORLDCOM's invoice.

     7.3 Termination of a Service Schedule. Either party may terminate a Service
Schedule in accordance with the termination provisions of the applicable Service
Schedule.

                           MCI WORLDCOM CONFIDENTIAL

                                       3
<PAGE>   8

     7.4 Customer's Termination Liability. If (a) Customer terminates this
Agreement during the Term, for reasons other than to take service under another
arrangement with MCI WORLDCOM having equal or greater term and volume
requirements; or (b) MCI WORLDCOM terminates this Agreement in accordance with
Sections 7.2(f) or (g), then Customer will pay termination charges in accordance
with Schedule One. If Customer terminates a Service Schedule other than in
accordance with that Schedule; or (b) MCI WORLDCOM terminates a Service Schedule
in accordance with that Schedule, then Customer will pay termination charges in
accordance with the applicable Schedule.

     7.5 Service Orders. Customer shall request the delivery of dedicated local
access services by executing a service order in form and substance satisfactory
to MCI WORLDCOM (the "Service Order"). The Service Order sets forth the place of
delivery, circuit contracted term, pricing and other details. All Service Orders
are subject to the terms and conditions of this Agreement. A separate Service
Order must be completed for each circuit ordered. Customer will be responsible
for payment of the rates and charges for the contracted term, as set forth in
each Service Order. Each Service Order shall survive the termination or
expiration of this Agreement; provided, however, that MCI WORLDCOM may terminate
one or more Service Orders if MCI WORLDCOM terminates this Agreement pursuant to
Section 7 hereof. If Customer terminates a Service Order prior to the end of six
(6) months (the "Minimum Installation Period") for reasons other than for
"Cause" (as defined in Section 6 of Schedule One) or if MCI WORLDCOM terminates
a Service Order for Cause prior to the Minimum Installation Period for any
circuit, then Customer will pay within thirty (30) days after such termination:
the monthly recurring charge for such circuit(s) multiplied by six (6) minus the
monthly recurring charge for such circuit multiplied by the number of months
installed. Notwithstanding a termination of a Service Order, the Agreement and
other Service Orders will remain in full force and effect unless expressly
terminated as permitted by this Agreement.

8. Indemnification. Each party agrees to defend, at its own expense, and
indemnify and hold harmless the other party and its subcontractors (collectively
the "Indemnitees"), from and against any claims, suits, damages and expenses for
personal property, death or bodily harm, brought by a third party and asserted
against or incurred by any of the Indemnitees arising out of or relating to: (a)
either party's acts, omissions and/or breach of its obligations under this
Agreement. In addition, Customer agrees to defend, at its own expense, and
indemnify and hold harmless MCI WORLDCOM and its Indemnities from and against
any claims, suits, damages and expenses asserted by a third party against or
incurred by any of the MCI WORLDCOM Indemnities arising out of or relating to:
(a) use of any Services or related products and documentation provided to
Customer hereunder; (b) Customer's connection of any MCI WORLDCOM product or
service to any third party service or network, including without limitation,
damages resulting from unauthorized use of, or access to, MCI WORLDCOM's
network, (c) the violation of any FCC or other applicable international,
federal, state or local law or regulation by Customer; and (d) the accuracy of
or authorization for any service orders submitted by Customer hereunder. In
accordance with the indemnifications set forth in this Section, each party shall
pay all damages, settlements, expenses and costs, including costs of
investigation, court costs and reasonable attorneys' fees and costs (including
allocable costs of in-house counsel) incurred by the other party's Indemnitees,
including, without limitation, reasonable attorneys' fees and costs (including
allocable costs of in-house counsel) incurred in enforcing this Agreement.
Customer shall be fully responsible to MCI WORLDCOM for all acts or omissions of
Customer's employees, customers, end-users (whether authorized users or
otherwise), vendors, subcontractors, and agents with respect to the ordering or
use of the Services provided hereunder, or in any respect related to the
provisions or subject matter of this Agreement.

9. Disclaimer of Certain Damages/ of MCI WORLDCOM's Liability.

     9.1 Disclaimer of Warranties. EXCEPT AS SPECIFICALLY SET FORTH IN THIS
AGREEMENT AND THE GSA SCHEDULES, MCI WORLDCOM MAKES NO WARRANTIES, EXPRESS OR
IMPLIED, AS TO ANY MCI WORLDCOM SERVICES, RELATED PRODUCT OR DOCUMENTATION. MCI
WORLDCOM SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING
WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR TITLE OR NONINFRINGEMENT OF THIRD PARTY RIGHTS.

     9.2 Disclaimer of Certain Damages. NEITHER PARTY SHALL BE LIABLE TO THE
OTHER FOR ANY INDIRECT, CONSEQUENTIAL, EXEMPLARY, SPECIAL, INCIDENTAL OR
PUNITIVE DAMAGES, INCLUDING WITHOUT LIMITATION LOSS OF USE OR LOST BUSINESS,
REVENUE, PROFITS, OR GOODWILL, ARISING IN CONNECTION WITH THIS AGREEMENT, THE
SERVICES, RELATED PRODUCTS, DOCUMENTATION AND/OR THE INTENDED USE THEREOF, UNDER
ANY THEORY OF TORT, CONTRACT, WARRANTY, STRICT LIABILITY OR NEGLIGENCE, EVEN IF
THE PARTY HAS BEEN ADVISED, KNEW OR SHOULD HAVE KNOWN OF THE POSSIBILITY OF SUCH
DAMAGES.

     9.3 Limitation of MCI WORLDCOM's Liability. WITHOUT LIMITATION OF THE
PROVISIONS OF SECTION 9.2 ABOVE, THE TOTAL LIABILITY OF MCI WORLDCOM TO CUSTOMER
IN CONNECTION WITH THIS AGREEMENT SHALL BE LIMITED TO THE LESSER OF (A) DIRECT
DAMAGES PROVEN BY CUSTOMER OR (B) THE AGGREGATE AMOUNTS PAID BY CUSTOMER TO MCI
WORLDCOM UNDER THIS AGREEMENT FOR THE ONE (1) MONTH PERIOD PRIOR TO ACCRUAL OF
SUCH CAUSE OF ACTION FOR THE SPECIFIC PRODUCT OR SERVICE WHICH FORMS THE BASIS
FOR SUCH CAUSE OF ACTION. THE FOREGOING LIMITATION APPLIES TO ALL CAUSES OF
ACTIONS AND CLAIMS, INCLUDING, WITHOUT LIMITATION, BREACH OF CONTRACT, BREACH OF
WARRANTY, NEGLIGENCE, STRICT LIABILITY, MISREPRESENTATION AND OTHER TORTS.
FURTHER, MCI WORLDCOM'S LIABILITY WITH RESPECT TO INDIVIDUAL MCI WORLDCOM
SERVICES MAY ALSO BE LIMITED PURSUANT TO THE TERMS AND CONDITIONS OF THE
APPLICABLE GSA SCHEDULE. CUSTOMER ACKNOWLEDGES AND ACCEPTS THE REASONABLENESS OF
THE FOREGOING DISCLAIMERS AND LIMITATIONS OF LIABILITY.

10. Compliance with Laws. All Services are provided subject to applicable local
laws and regulation, including the applicable Tariffs and price lists of MCI
WORLDCOM, in the countries in which Service is provided. Customer is responsible
for complying with all laws and regulations including, without limitation, (i)

                           MCI WORLDCOM CONFIDENTIAL

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<PAGE>   9

local license or permit requirements, (ii) export, import and customs laws and
regulations (such as the export and re-export controls under the U.S. Export
Administration Regulations and/or similar regulations of the U.S. or any other
country) which may apply to certain equipment, software and technical data
provided hereunder, and (iii) foreign corrupt practices acts. Notwithstanding
the foregoing, MCI WORLDCOM does not represent that any necessary import, export
or customs licenses or approvals will be granted with respect to Services
provided hereunder.

11. Resale of MCI WORLDCOM Services.

     11.1 In reselling Services under this Agreement, Customer agrees to sell
and bill its own services under Customer's own name, identity or mark, and
Customer further agrees not to reference MCI WORLDCOM name or marks in any
context involving Customer's furnishing of services to the public. In addition
to other applicable remedies, MCI WORLDCOM shall be entitled to seek injunctive
relief with respect to any violation of this Paragraph 11. Any opportunity to
cure a breach of this Paragraph shall be subject to MCI WORLDCOM's reasonable
satisfaction as to the curability of the original injury caused by such breach
and the effectiveness of any attempted cure. MCI WORLDCOM's right to enforce
this Paragraph as a material provision of this Agreement shall not in any manner
require a showing of financial, legal or other loss or injury to MCI WORLDCOM of
any kind

     11.2 Customer agrees that it will obtain and maintain any and all approvals
to resell the Services hereunder from the FCC, including requirements imposed by
Section 214 of the Communications Act of 1934, as amended, and state regulatory
bodies. In the event Customer fails to obtain or maintain the appropriate
approvals, MCI WORLDCOM shall not be liable for any suspension of service or
other delay or failure to provide the Services.

     11.3 Customer shall have sole responsibility for interacting with its
customers in all matters pertaining to service, including the placing and
handling of service orders, service installation, operation and termination,
dispute handling and resolution, and billing and collection matters. MCI
WORLDCOM shall incur no obligation, nor shall it be deemed to have any
obligation, to interact with Customer's customers and end users ("End Users")
for any reason or purpose. Customer shall cooperate with MCI WORLDCOM as
necessary to address and resolve service-related issues and problems and shall
impose upon its customers an obligation to cooperate with Customer in addressing
and resolving service-related issues and problems.

     11.4 Customer understands and accepts that, as part of MCI WORLDCOM's
normal business policy and practices and its obligations under law, MCI WORLDCOM
will engage in extensive marketing efforts in an attempt to sell its services to
the public and that such efforts will result in active competition with Customer
for the business of users who are Customer's End Users or prospects, provided
MCI WORLDCOM will not use Confidential Information to actively compete with
Customer. Under no circumstance shall any inference be derived that MCI
WORLDCOM's entry into this Agreement with Customer means that MCI WORLDCOM will
restrict its efforts to compete against Customer in any way.

     11.5 Customer understands and accepts that no fiduciary relationship arises
by virtue of this Agreement and that, accordingly, MCI WORLDCOM incurs none of
the obligations that arise in such relationship as an incident of its fulfilling
its obligations under this Agreement. Further, Customer understands and accepts
that MCI WORLDCOM neither insures the profits for Customer nor guarantees the
success of Customer's business as a result of Customer's receipt of Services
under this Agreement.

12. Miscellaneous.

     12.1 Assignment. Neither party may assign this Agreement or any of its
rights hereunder without the prior written consent of the other party, which
consent shall not be unreasonably withheld; provided however that either party
may assign this Agreement or any of its rights hereunder to an affiliate without
the written consent of the other party. Subject to the foregoing, in the event
of any assignment of this Agreement or any rights hereunder by either party, the
assigning party shall remain liable for the performance of its obligations
hereunder. Any attempted transfer or assignment of this Agreement by either
party not in accordance with the terms of this Section 12.1 shall be null and
void. MCI WORLDCOM will not withhold consent in the event of a merger, sale or
change or transfer of controlling interest to another entity provided such
entity meets MCI WORLDCOM's credit approval.

     12.2 Governing Law. This Agreement shall be governed by and construed in
accordance with the domestic laws of the State of Illinois without regard to its
choice of law principles, except to the extent the Communications Act of 1934,
as amended, applies.

     12.3 English Language. In the event of a conflict between this Agreement
and any subsequent translations, this English language version shall prevail.

     12.4 Arbitration. Not withstanding Tariffed rules for the arbitration of
Customer payment disputes, any and all disputes arising out of or related to
this Agreement, including, but not limited to, tort claims, shall be submitted
to J.A.M.S./ENDISPUTE for final and binding arbitration pursuant to the
J.A.M.S./ENDISPUTE Arbitration Rules and Procedures in effect on the date of
commencement of arbitration, and as modified by this Section. The arbitration
shall be conducted in accordance with the United States Arbitration Act, 9
U.S.C. 1 et seq. ("USAA"), notwithstanding any choice of law provision in this
Agreement. Each party shall bear the fees and costs it incurs in preparing and
presenting its own case. The parties agree that Chicago, Illinois shall be the
location for the arbitration hearing. Any controversy over whether an issue is
arbitrable shall be determined by the arbitrator. The arbitrator shall have no
authority to award punitive or exemplary damages. The award may be confirmed and
enforced in any court of competent jurisdiction. All post-award proceedings
shall be governed by the USAA.

     12.5 Enforceability. If any paragraph or clause of this Agreement shall be
held to be invalid or unenforceable by any body or entity of competent
jurisdiction, then the remainder of the Agreement shall remain in full force and
effect and the parties shall promptly negotiate a replacement provision or agree
that no replacement is necessary.

     12.6 No Waiver. Neither party's failure, at any time, to enforce any right
or remedy available to it under this Agreement shall be construed to be a waiver
of such party's right to enforce each and every provision of this Agreement in
the future.

     12.7 Notice. Any notice required to be given under this Agreement shall be
in writing, in English, and transmitted via facsimile, overnight courier, hand
delivery or certified or

                           MCI WORLDCOM CONFIDENTIAL

                                       5
<PAGE>   10

registered mail, postage prepaid and return receipt requested, to the parties at
the addresses on the signature page of this Agreement or such other addresses as
may be specified by written notice. Notice sent in accordance with this Section
shall be deemed effective when received. A Party may from time to time designate
another address or addresses by notice to the other party in compliance with
this Section.

     12.8 Force Majeure. Any delay in or failure of performance by either party
under this Agreement shall not be considered a breach of this Agreement if and
to the extent caused by events beyond the reasonable control of the party
affected, including but not limited to acts of God, embargoes, governmental
restrictions, strikes (other than those only affecting Customer), riots, wars or
other military action, civil disorders, rebellion, fires, floods, vandalism, or
sabotage. Market conditions and/or fluctuations (including a downturn of
Customer's business) shall not be deemed force majeure events. The party whose
performance is affected by such events shall promptly notify the other party,
giving details of the force majeure circumstances, and the obligations of the
party giving such notice shall be suspended to the extent caused by the force
majeure and so long as the force majeure continues, and the time for performance
of the affected obligation hereunder shall be extended by the time of the delay
caused by the force majeure event.

     12.9 Use of Facilities and Equipment. MCI WORLDCOM's obligation under this
Agreement is to furnish services consisting of facilities and equipment that is
exclusively of MCI WORLDCOM's choosing. Unless otherwise provided for in this
Agreement, MCI WORLDCOM may substitute facilities or equipment used to furnish
the Services or substitute comparable service for any Service furnished under
this Agreement, at any time.

     12.10 Survival. The provisions of this Agreement which by their nature are
intended to survive this agreement shall survive the termination or expiration
of this Agreement.

     12.11 Entire Agreement. This Agreement, including the Tariffs and GSA
Schedules, constitutes the entire agreement between the parties with respect to
its subject matter, and as to all other representations, understandings or
agreements which are not fully expressed herein. No amendment to this Agreement
shall be valid unless in writing and signed by both parties; provided however,
that MCI WORLDCOM may modify its Tariffs from time to time in accordance with
law and thereby affect the services furnished to Customer. Section titles or
references used in this Agreement shall be without substantive meaning or
content of any kind whatsoever and are not a part of the agreements among the
parties evidenced hereby.

     12.12 Signature Authorization. The parties have duly executed and agreed to
be bound by this Agreement as evidenced by the signatures of their authorized
representatives. Each party represents and warrants to the other that the
signatory identified beneath its name has full authority to execute this
Agreement on its behalf.

                           MCI WORLDCOM CONFIDENTIAL

                                       6
<PAGE>   11

                                 SCHEDULE THREE

                         UNITED STATES TARIFFED SERVICES

1. Service Provisioning and Receipt. MCI WORLDCOM will provide to Customer, as
applicable, international, interstate, intrastate telecommunications service(s)
pursuant to the applicable tariffs and price lists of MCI WORLDCOM and its
U.S.-based affiliates (individually, a "US Tariff" and collectively, the "US
Tariffs"), each as supplemented by this Schedule Three to the extent permitted
by law. This Schedule Three incorporates by reference the terms of each such US
Tariff. Notwithstanding anything in this Agreement to the contrary, MCI WORLDCOM
may modify its Tariffs from time to time in accordance with law and thereby
affect the services furnished to Customer. This Schedule Three is a "Specialized
Customer Arrangement" as defined in Section B-17.03 of the MCI WORLDCOM Network
Services, Inc. Tariff FCC No. 1.

2. Services. Attachment 3-1, attached hereto and incorporated by reference,
contains additional rates, discounts and certain other provisions applicable to
the Services provided to Customer pursuant to this Schedule Three and the US
Tariffs (the "US Tariffed Services").

3. Tariff Option. MCI WORLDCOM shall, if required, file a Tariff Option
consistent with the terms of this Attachment 3-1.

4. Definitions Capitalized terms not otherwise defined in this Agreement shall
have the definition given to them in MCI FCC Tariff No. 1 and other filed and
effective tariffs of MCI WORLDCOM affiliates.

                           MCI WORLDCOM CONFIDENTIAL

                                       1
<PAGE>   12

                                 ATTACHMENT 3-1

1.  RATES AND DISCOUNTS FOR THE SERVICES. Customer will pay the below rates and
    receive the below discounts, if any, for the Services specified below.
    References in this Attachment 3-1 to standard Tariffed rates and/or
    discounts refer to the corresponding standard MCI WORLDCOM On-Net Service
    rates and/or discounts set forth in the applicable US Tariffs for such
    service(s), as MCI may amend from time to time. All references to
    "intrastate" and "interstate" contained herein shall refer to domestic US
    Tariffed Services only. For any Postalized Rates which fluctuate with
    changes in the Tariffs, those Postalized Rates will be adjusted on the first
    day of each January during each calendar year of the Term by an amount equal
    to the same percentage by which the corresponding standard Tariffed rates
    were adjusted during the immediately preceding calendar year. The rates set
    forth in Sections 1.1 and 1.2 will remain fixed for the Term. MCI WORLDCOM
    will waive installation charges for circuits; provided, however, if Customer
    terminates any circuit prior to twelve (12) months, MCI WORLDCOM will bill
    Customer the then-tariffed installation charges at the time of termination.

    1.1 DOMESTIC PRIVATE LINE SERVICE (OPTION 1). For domestic Private Line
        Service, Customer will pay the following mileage-based monthly recurring
        charges for DS-3, OC-3, and OC-12 circuits. If the Voice Grade
        Equivalent (VGE) mileage rate for any circuit is less that the minimum
        monthly recurring charges set forth below, Customer will pay the minimum
        monthly recurring charge in lieu of the VGE mileage rate.

<TABLE>
<CAPTION>
Circuit Type      Voice Grade Equivalent Mileage Rate      Minimum Monthly Recurring Charge
------------      -----------------------------------      --------------------------------
<S>               <C>                                      <C>
DS-1              [***]                                    [***]
DS-3              [***]                                    [***]
OC-3              [***]                                    [***]
OC-12             [***]                                    [***]
</TABLE>

    1.2 METRO PRIVATE LINE SERVICE (TYPE 1).

        1.2.1  Customer will pay the monthly recurring charges for DS-1 and DS-3
               circuits as set forth below for On-Net Metro Private Line Service
               based upon the incumbent local exchange carrier (ILEC) region.
               Dedicated access charges are included in the monthly recurring
               charges:

<TABLE>
<CAPTION>
CIRCUIT TYPE          AMERITECH          BELL ATLANTIC      BELL SOUTH         NYNEX-NY
------------          ---------          -------------      ----------         --------
<S>                   <C>                <C>                <C>                <C>

DS-1

0 Mile                [***]              [***]              [***]              [***]
1 Mile                [***]              [***]              [***]              [***]
Each Add'l Mile       [***]              [***]              [***]              [***]

DS-3

0 Mile                [***]              [***]              [***]              [***]
1 Mile                [***]              [***]              [***]              [***]
Each Add'l Mile       [***]              [***]              [***]              [***]
</TABLE>

<TABLE>
<S>              <C>       <C>              <C>      <C>         <C>
CIRCUIT TYPE     NYNEX     PACIFIC BELL     SNET     SW BELL     US WEST
</TABLE>

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

                           MCI WORLDCOM CONFIDENTIAL

                                       1
<PAGE>   13

<TABLE>
DS-1

<S>               <C>             <C>             <C>             <C>             <C>
0 Mile            [***]             [***]             [***]             [***]             [***]
1 Mile            [***]             [***]             [***]             [***]             [***]
Each Add'l Mile   [***]             [***]             [***]             [***]             [***]

DS-3

0 Mile            [***]             [***]             [***]             [***]             [***]
1 Mile            [***]             [***]             [***]             [***]             [***]
Each Add'l Mile   [***]             [***]             [***]             [***]             [***]
</TABLE>

        1.2.2  On-Net DS-3 Hubs. For On-Net DS-3 Hubs (Type 1 only), Customer
               will pay a monthly recurring charge equal to [***] per mile per
               DS-3 Hub. Customer will pay a one-time installation charge of
               [***] per DS-3 Hub. Dedicated access charges are included in the
               monthly recurring charge.

        1.2.3  On-Net DS-1 End Links. For On-Net DS-1 End Links (Type 1 only),
               Customer will pay a monthly recurring charge of [***] per mile
               for each DS-1 End Link. Dedicated access charges are include in
               the monthly recurring charge.

        1.2.4  On-Net Sonet Inter Office Channels. For On-Net Sonet Inter-Office
               Channels (Type 1 only), Customer will pay a monthly recurring
               charge per circuit equal to [***] for such Inter-Office Channel.

    1.3 METRO PRIVATE LINE SERVICE (TYPE 2). For Metro Private Line Service
        (Type 2) for DS-0 and DS-1 circuits, Customer will pay a monthly
        recurring charge per circuit equal to the greater of: (i) [***] off the
        ILEC rate for such circuit or (ii) the offnet cost plus twenty five
        percent (25%). For Metro Private Line Service (Type 2) for DS-3
        circuits, Customer will pay a monthly recurring charge per circuit equal
        to the greater of: (i) [***] rate for such circuit or (ii) the offnet
        cost plus [***].

2.  LOCAL LOOP FACILITIES. MCI WorldCom shall, on behalf and upon Customer's
    request, obtain telecommunications facilities ("Local Loop Facilities")
    connecting Customer with a LEC or CLEC to an MCI WorldCom Point of Presence
    (POP). Customer will execute a Letter of Agency authorizing MCI WorldCom to
    interact directly with the provider(s) of these access telecommunications
    facilities on behalf of Customer. When MCI WorldCom acts as Customer's
    agent, Customer is responsible for charges, including without limitation,
    monthly charges, usage charges, installation charges, non-recurring charges,
    or applicable termination/cancellation liabilities, of the provider(s) of
    Local Loop facilities to MCI WorldCom's POP. In obtaining Local Loop
    Facilities on behalf of the Customer, MCI WorldCom shall be responsible for
    provisioning and the initial testing of an interconnection (reasonably
    coordinated with the in-service date) between such inter-exchange service
    set forth in the order and a designated Customer termination point ("Local
    Access"). [***]

3.  SERVICE MIGRATION. In the event Customer has multiple DS-1's, DS-3's, OC-3's
    or OC-12's between the same two city pairs, Customer has the option of
    ordering a larger level of service (e.g., DS-3, OC-3, OC-12, or OC-48), and
    migrate the existing circuits onto the larger bandwidth. Customer agrees to
    pay for the entire amount of the larger bandwidth at the time of
    installation of the new order. MCI WORLDCOM agrees to allow Customer to
    migrate services provided hereunder to Clear Channel bandwidth with no
    penalties as long as the new service level is equal or greater in monthly
    recurring revenue to MCI WORLDCOM and such service level is made part of
    this Agreement through amendment. In the event Customer desires to modify
    its existing lease

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

                           MCI WORLDCOM CONFIDENTIAL

                                       2
<PAGE>   14

structure to an Indefeasible Right of Use, Dark Fiber, DMDW or UDMDW window,
the total of all monthly lease payments made prior to the modification will be
directly applied to the total cost of the initial payment.

                           MCI WORLDCOM CONFIDENTIAL

                                       3
<PAGE>   15

                                  SCHEDULE FOUR
                              NON-TARIFFED SERVICES

This Schedule Four, along with the Schedule One and Schedule Two, comprises the
non-tariffed services portion of this Agreement and contains additional rates,
discounts and certain other provisions applicable to the Services provided to
Customer pursuant to this Schedule Four. "Non-Tariffed Services means non-United
States services and "enhanced services" and associated equipment provided by MCI
WORLDCOM to Customer pursuant to this Agreement. Each Non-Tariffed Service
provided hereunder has a corresponding Attachment specifying the applicable
rates, discounts, and other terms and conditions according to which MCI WORLDCOM
will provide the Non-Tariffed Service. To the extent that the terms and
conditions of any Attachment hereunder are inconsistent with the terms and
conditions of any other portion of the GSA, the Attachment governs with respect
to the corresponding Non-Tariffed Service.

                           MCI WORLDCOM CONFIDENTIAL

                                       4
<PAGE>   16

                                 ATTACHMENT 4-1

                            UUDIRECT(SM) T1 SCHEDULE

<TABLE>
<CAPTION>
SERVICE(1)                                 MONTHLY FEE        START-UP CHARGE(2)
----------                                 -----------        ------------------
<S>                                        <C>                <C>
|_| T1 Burstable(3)                                               [***]

    |_| 0 - 128 Kbps sustained use            [***]

    |_| 128.01 - 256 Kbps sustained use       [***]

    |_| 256.01 - 384 Kbps sustained use       [***]

    |_| 384.01 - 512 Kbps sustained use       [***]

    |_| Over 512 Kbps sustained use           [***]

|_| T1 Price-Protected(4)                     [***]               [***]

|_| Double T(SM),(4)                          [***]               [***]

|_| Diverse T(SM),(4)                         [***]               [***]
</TABLE>

PRICES ABOVE DO NOT INCLUDE ANY TELCO LINE CHARGES, EQUIPMENT COSTS, OR NETWORK
APPLICATIONS FEES.(5)

TERM COMMITMENT(6) The term of this Schedule will be coterminous with the Global
Service Agreement between Customer and MCI WORLDCOM, Inc. (the "GSA").

DISCOUNT Customer will receive a [***] off monthly recurring charges on ports
only.

<TABLE>
<CAPTION>
DISCOUNTED EQUIPMENT(7) (available only with service)            PRICE
-----------------------------------------------------            -----
<S>                                                              <C>
  |_| OpenROUTE GTX 1000 router with internal T1 CSU/DSU         [***]

  |_| Additional OpenROUTE internal T1 CSU/DSU                   [***]

  |_| Cisco 2610 router with internal T1 CSU/DSU                 [***]
</TABLE>

--------

1  Connectivity is provided to Customer's organization only. Resale to or use by
   persons or entities outside of Customer's organization is prohibited. UUNET
   may suspend the service or terminate this Schedule effective upon notice for
   a violation of this prohibition.

2  To ensure proper installation, UUNET will order all telco lines. A $500
   surcharge applies to Customer-ordered lines. Installation may be scheduled
   between the hours of 8AM and 7PM ET Monday through Friday (excluding
   holidays). If Customer requires installation outside of these hours UUNET
   will charge an additional $500 fee.

3  With T1 Burstable service, Customer receives full T1 access to UUNET and can
   burst to the full 1.5 Mbps at any time. Monthly billing is based on the level
   of sustained use during the month, as determined by traffic samples taken
   every five minutes. The level under which 95% of the samples fall is the
   sustained use. Customer may move to a lower burstable service level if the
   sustained use is at or below such burstable service level for at least two
   consecutive months and Customer thereafter notifies UUNET in writing of its
   intent to move to such lower burstable service level.

4  Minimum one (1) year Term Commitment is required, but Term Commitment
   discounts do not apply.

5  Descriptions of the domain name, mail, news services, and other network
   applications available in connection with this service, and the pricing and
   additional terms applicable to these services, are set forth in the Network
   Applications Fee Schedule available at www.uu.net/terms. UUNET reserves the
   right to change the Network Applications Fee Schedule from time to time,
   effective upon posting of the changes to that URL or other notice to
   Customer.

6  Discount applicable only to Monthly Fee. At the conclusion of the Term
   Commitment, this Schedule shall continue in effect on a month-to-month basis
   at UUNET's then-current list price for the service.

7  UUNET is acting only as a reseller with respect to the hardware and software
   offered under this Schedule ("Equipment"), which was manufactured by a third
   party ("Manufacturer"). UUNET will provide first -level support for
   Equipment, but will not repair or replace Equipment. Customer's use of the
   Equipment is subject to the terms and conditions of the Manufacturer's end
   user agreement. Should Customer purchase Equipment from UUNET, UUNET will
   ship the current UUNET-tested version of the Equipment to the Customer.

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

<PAGE>   17

<TABLE>
<CAPTION>
<S>                                                              <C>
  |_| Cisco 3640 router with internal T1 CSU/DSU                 [***]

  |_| Additional Cisco internal T1 CSU/DSU                       [***]
</TABLE>

PAYMENT If Purchase Order is required, return PO with this form and provide
PO#:
    ---------------------------

                   PLEASE SIGN THIS SCHEDULE WHERE INDICATED.
                         Additional Terms and Conditions

1.  UUNET Technologies, Inc. ("UUNET") exercises no control over, and accepts no
    responsibility for, the content of the information passing through UUNET's
    host computers, network hubs and points of presence (the "UUNET Network").
    EXCEPT AS EXPRESSLY SET FORTH IN SECTION 7 BELOW, UUNET (a) MAKES NO
    WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, FOR THE SERVICES AND
    EQUIPMENT IT IS PROVIDING, AND (b) DISCLAIMS ANY WARRANTY OF TITLE,
    MERCHANTABILITY, NON-INFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE. Use
    of any information obtained via the UUNET Network is at Customer's own risk.
    UUNET specifically denies any responsibility for the accuracy or quality of
    information obtained through its services. UUNET shall not be liable for any
    delay or failure in performance due to Force Majeure, which shall include
    without limitation acts of God, earthquake, labor disputes, changes in law,
    regulation or government policy, riots, war, fire, epidemics, acts or
    omissions of vendors or suppliers, equipment failures, transportation
    difficulties, or other occurrences which are beyond UUNET's reasonable
    control.

2.  All use of the UUNET Network and the service must comply with the
    then-current version of the UUNET Acceptable Use Policy ("Policy") which is
    made a part of this Schedule and is available at the following URL:
    www.uu.net/terms. UUNET reserves the right to amend the Policy from time to
    time, effective upon posting of the revised Policy at the URL or other
    notice to Customer. UUNET reserves the right to suspend the service or
    terminate this Schedule effective upon notice for a violation of the Policy.
    Customer agrees to indemnify and hold harmless UUNET from any losses,
    damages, costs or expenses resulting from any third party claim or
    allegation ("Claim") arising out of or relating to use of the service,
    including any Claim which, if true, would constitute a violation of the
    Policy.

3.  NEITHER PARTY SHALL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
    PUNITIVE OR CONSEQUENTIAL DAMAGES THAT RESULT FROM CUSTOMER'S OR CUSTOMER'S
    USERS' USE OF THE UUNET NETWORK AND THE SERVICE INCLUDING, WITHOUT
    LIMITATION, ANY SUCH DAMAGES FOR LOSS OF DATA RESULTING FROM DELAYS,
    NON-DELIVERIES, MISDELIVERIES OR SERVICE INTERRUPTIONS. Notwithstanding
    anything to the contrary stated in this Schedule or in the GSA, Customer's
    sole remedies for any claims relating to this service or the UUNET Network
    are set forth in Section 7 below.

4.  Networks assigned from a UUNET net-block are non-portable. Network space
    allocated by UUNET must be returned to UUNET in the event Customer
    discontinues service.

5.  Payment terms shall be as set forth in the GSA. Fees paid by Customer under
    this Agreement for UUNET services will count towards Customer's Annual
    Minimum under its existing MCI WorldCom GSA. The amount to be applied will
    be that actually paid by Customer, net of any discounts or applicable
    credits, and excluding any amount paid for taxes or tax-like surcharges or
    fees.

6.  Billing for UUNET service will commence when a UUNET hub and a functioning
    telephone circuit are prepared to route IP packets to Customer's site. The
    Start-up Charge is invoiced upon acceptance of this Schedule by UUNET.
    Charges for Equipment shall be invoiced upon shipment. Service is invoiced
    monthly in advance, and may be canceled only by 60 days' advance written
    notice. In the event of early cancellation of a Term Commitment, Customer
    will be required to pay 75% of UUNET's standard Monthly Fee for each month
    remaining in the Term Commitment.  UUNET reserves the right to change the
    rates by notifying Customer 60 days in advance of the effective date of the
    change.

7.  The Service Level Agreement ("SLA") for this service, which is made a part
    of this Schedule, is set forth at www.uu.net/terms and applies only to
    customers agreeing to a Term Commitment of at least one year. UUNET reserves
    the right to amend the SLA from time to time effective upon posting of the
    revised SLA to the URL or other notice to Customer; provided, that in the
    event of any amendment resulting in a material reduction of the SLA's
    service levels or credits, Customer may terminate this Schedule without
    penalty by providing UUNET written notice of termination during the 30 days
    following notice of such amendment. The SLA sets forth Customer's sole
    remedies for any claim relating to this service or the UUNET Network,
    including any failure to meet any guarantee set forth in the SLA. UUNET's
    records and data shall be the basis for all SLA calculations and
    determinations. Notwithstanding anything to the contrary, the maximum amount
    of credit in any calendar month under the SLA shall not exceed the Monthly
    Fee and/or Start-up Charge which, absent the credit, would

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

<PAGE>   18

    have been charged for UUNET service that month (collectively the "UUNET
    Fees"); provided, that the maximum amount of credit for failure to meet the
    Availability Guarantee shall not exceed the sum of (a) the UUNET Fees, plus
    (b) the telephone company line charge which, absent the credit, would have
    been charged for such month.

8.  Neither party may use the other party's name, trademarks, tradenames or
    other proprietary identifying symbols without the prior written approval of
    the other party. Neither party may assign or transfer any of its rights or
    obligations under this Schedule without the express, prior written consent
    of the other party; provided, that either party may assign or transfer this
    Schedule to any affiliate of such party upon advance written notice to the
    other party. No failure on the part of either party to exercise, and no
    delay in exercising, any right or remedy hereunder shall operate as a waiver
    thereof nor shall any single or partial exercise of any right or remedy
    hereunder preclude any other or further exercise thereof or the exercise of
    any other right or remedy granted hereby or by law.

9.  MCI WORLDCOM, Inc. or its affiliates or subcontractors may perform some or
    all of UUNET's duties and/or obligations hereunder.

10. This Schedule is in addition to and subject to the GSA. To the extent this
    Schedule conflicts with any provision of the GSA, this Schedule shall
    prevail. Activation of service shall indicate UUNET's acceptance of this
    Schedule. Use of the UUNET Network constitutes acceptance of this Schedule.

AGREED AND ACCEPTED BY CUSTOMER:

Signature:                                  Company Name:
          -------------------------                      -----------------------

Printed Name:                               Address:
             ----------------------                 ----------------------------

Title:
      -----------------------------         ------------------------------------

Date:                                       Telephone           Fax
     ------------------------------                  ----------    -------------

<PAGE>   19

                                 ATTACHMENT 4-2
                        UUDIRECT(SM) T3 BURSTABLE SCHEDULE

<TABLE>
<CAPTION>
SERVICE(1)                                     MONTHLY FEE    START-UP CHARGE(2)
-------                                        -----------    ------------------
<S>                                            <C>            <C>
                                                                    [***]
|_| 0 Mbps     - 3 Mbps sustained use          [***]
|_| 3.01 Mbps  - 6 Mbps sustained use          [***]
|_| 6.01 Mbps  - 7.5 Mbps sustained use        [***]
|_| 7.51 Mbps  - 9 Mbps sustained use          [***]
|_| 9.01 Mbps  - 10.5 Mbps sustained use       [***]
|_| 10.51 Mbps - 12 Mbps sustained use         [***]
|_| 12.01 Mbps - 13.5 Mbps sustained use       [***]
|_| 13.51 Mbps - 15 Mbps sustained use         [***]
|_| 15.01 Mbps - 16.5 Mbps sustained use       [***]
|_| 16.51 Mbps - 18 Mbps sustained use         [***]
|_| 18.01 Mbps - 19.5 Mbps sustained use       [***]
|_| 19.51 Mbps - 21 Mbps sustained use         [***]
|_| 21.01 Mbps - 45 Mbps sustained use         [***]
</TABLE>

PRICES ABOVE DO NOT INCLUDE ANY TELCO LINE CHARGES, EQUIPMENT COSTS(3), OR
NETWORK APPLICATIONS FEES.(4)

TERM COMMITMENT(5) Unless a different Term is selected below, the Term of this
Schedule will be coterminous with the Global Service Agreement as currently in
effect between Customer and MCI WORLDCOM, Inc. (the "GSA").

Customer shall receive a [***] off its monthly recurring charges on ports only.

PAYMENT

If a Purchase Order is required, return the PO with this form and provide
PO#:
    ----------------------------

        PLEASE SIGN THIS SCHEDULE WHERE INDICATED AFTER READING THE TERMS
                                AND CONDITIONS.

--------

1  With T3 Burstable service, Customer receives full T3 access to UUNET and can
   burst to the full 45 Mbps at any time. Monthly billing is based on the level
   of sustained use during the month, as determined by traffic samples taken
   every five minutes. The level under which 95% of the samples fall is the
   sustained use. Customer may move to a lower burstable service level if the
   sustained use is at or below such burstable service level for at least two
   consecutive months and Customer thereafter notifies UUNET in writing of its
   intent to move to such lower burstable service level.

2  To ensure proper installation, UUNET will order all telco lines. A $500
   surcharge applies to Customer-ordered lines. Installation may be scheduled
   between the hours of 8AM and 7PM ET Monday through Friday (excluding
   holidays). If Customer requires installation outside of these hours UUNET
   will charge an additional $500 fee.

3  UUNET is acting only as a reseller with respect to the hardware and software
   offered under this Schedule ("Equipment"), which was manufactured by a third
   party ("Manufacturer"). UUNET will provide first level support for Equipment,
   but will not repair or replace Equipment unless Customer has purchased CPE
   Maintenance from UUNET. Customer's use of the Equipment is subject to the
   terms and conditions of the Manufacturer's end user agreement. Should
   Customer purchase Equipment from UUNET, UUNET will ship the current
   UUNET-tested version of the Equipment to the Customer.

4  Descriptions of the domain name, mail, news services, and other network
   applications available in connection with this service, and the pricing and
   additional terms applicable to these services, are set forth in the Network
   Applications Fee Schedule available at www.uu.net/terms. UUNET reserves the
   right to change the Network Applications Fee Schedule from time to time,
   effective upon posting of the changes to that URL or other notice to
   Customer.

5  Discount applicable only to Monthly Fees. At the conclusion of the Term
   Commitment, this Schedule shall continue in effect on a month-to-month basis
   at UUNET's then-current list price for the service.

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

<PAGE>   20

                         ADDITIONAL TERMS AND CONDITIONS

1.  UUNET Technologies, Inc. ("UUNET") exercises no control over, and accepts no
    responsibility for, the content of the information passing through UUNET's
    host computers, network hubs and points of presence (the "UUNET Network").
    EXCEPT AS EXPRESSLY SET FORTH IN SECTION 7 BELOW, UUNET (a) MAKES NO
    WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, FOR THE SERVICES AND
    EQUIPMENT IT IS PROVIDING, AND (b) DISCLAIMS ANY WARRANTY OF TITLE,
    MERCHANTABILITY, NON-INFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE. Use
    of any information obtained via the UUNET Network is at Customer's own risk.
    UUNET specifically denies any responsibility for the accuracy or quality of
    information obtained through its services. UUNET shall not be liable for any
    delay or failure in performance due to Force Majeure, which shall include
    without limitation acts of God, earthquake, labor disputes, changes in law,
    regulation or government policy, riots, war, fire, epidemics, acts or
    omissions of vendors or suppliers, equipment failures, transportation
    difficulties, or other occurrences which are beyond UUNET's reasonable
    control.

2.  All use of the UUNET Network and the service must comply with the
    then-current version of the UUNET Acceptable Use Policy ("Policy") which is
    made a part of this Schedule and is available at the following URL:
    www.uu.net/terms. UUNET reserves the right to amend the Policy from time to
    time, effective upon posting of the revised Policy at the URL or other
    notice to Customer. UUNET reserves the right to suspend the service or
    terminate this Schedule effective upon notice for a violation of the Policy.
    Customer agrees to indemnify and hold harmless UUNET from any losses,
    damages, costs or expenses resulting from any third party claim or
    allegation ("Claim") arising out of or relating to use of the service,
    including any Claim which, if true, would constitute a violation of the
    Policy.

3.  NEITHER PARTY SHALL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
    PUNITIVE OR CONSEQUENTIAL DAMAGES THAT RESULT FROM CUSTOMER'S OR CUSTOMER'S
    USERS' USE OF THE UUNET NETWORK AND THE SERVICE INCLUDING, WITHOUT
    LIMITATION, ANY SUCH DAMAGES FOR LOSS OF DATA RESULTING FROM DELAYS,
    NON-DELIVERIES, MISDELIVERIES OR SERVICE INTERRUPTIONS. Notwithstanding
    anything to the contrary stated in this Schedule or in the GSA, Customer's
    sole remedies for any claims relating to this service or the UUNET Network
    are set forth in Section 7 below.

4.  Networks assigned from a UUNET net-block are non-portable. Network space
    allocated by UUNET must be returned to UUNET in the event Customer
    discontinues service.

5.  Payment terms shall be as set forth in the GSA. Fees paid by Customer under
    this Agreement for UUNET services will count towards Customer's Annual
    Minimum under its existing MCI WorldCom GSA. The amount to be applied will
    be that actually paid by Customer, net of any discounts or applicable
    credits, and excluding any amount paid for taxes or tax-like surcharges or
    fees.

6.  Billing for UUNET service will commence when a UUNET hub and a functioning
    telephone circuit are prepared to route IP packets to Customer's site. The
    Start-up Charge is invoiced upon acceptance of this Schedule by UUNET.
    Charges for Equipment shall be invoiced upon shipment. Service is invoiced
    monthly in advance, and may be canceled only by 60 days' advance written
    notice. In the event of early cancellation of a Term Commitment, Customer
    will be required to pay 75% of UUNET's standard Monthly Fee for each month
    remaining in the Term Commitment.  UUNET reserves the right to change the
    rates by notifying Customer 60 days in advance of the effective date of the
    change.

7.  The Service Level Agreement ("SLA") for this service, which is made a part
    of this Schedule, is set forth at www.uu.net/terms and applies only to
    customers agreeing to a Term Commitment of at least one year. UUNET reserves
    the right to amend the SLA from time to time effective upon posting of the
    revised SLA to the URL or other notice to Customer; provided, that in the
    event of any amendment resulting in a material reduction of the SLA's
    service levels or credits, Customer may terminate this Schedule without
    penalty by providing UUNET written notice of termination during the 30 days
    following notice of such amendment. The SLA sets forth Customer's sole
    remedies for any claim relating to this service or the UUNET Network,
    including any failure to meet any guarantee set forth in the SLA. UUNET's
    records and data shall be the basis for all SLA calculations and
    determinations. Notwithstanding anything to the contrary, the maximum amount
    of credit in any calendar month under the SLA shall not exceed the Monthly
    Fee and/or Start-up Charge which, absent the credit, would have been charged
    for UUNET service that month (collectively the "UUNET Fees"); provided, that
    the maximum amount of credit for failure to meet the Availability Guarantee
    shall not exceed the sum of (a) the UUNET Fees, plus (b) the telephone
    company line charge which, absent the credit, would have been charged for
    such month.

8.  Neither party may use the other party's name, trademarks, tradenames or
    other proprietary identifying symbols without the prior written approval of
    the other party. Neither party may assign or transfer any of its rights or
    obligations under this Schedule without the express, prior written consent
    of the other party; provided, that either party may assign or transfer this
    Schedule to any affiliate of such party upon advance written notice to the
    other party. No failure on the part of either party to exercise, and no
    delay in exercising, any right or remedy hereunder shall operate as a waiver
    thereof nor shall any single or partial exercise of any right or remedy

<PAGE>   21

    hereunder preclude any other or further exercise thereof or the exercise of
    any other right or remedy granted hereby or by law.

9.  MCI WORLDCOM, Inc. or its affiliates or subcontractors may perform some or
    all of UUNET's duties and/or obligations hereunder.

10. This Schedule is in addition to and subject to the GSA. To the extent this
    Schedule conflicts with any provision of the GSA, this Schedule shall
    prevail. Activation of service shall indicate UUNET's acceptance of this
    Schedule. Use of the UUNET Network constitutes acceptance of this Schedule.

AGREED AND ACCEPTED BY CUSTOMER:

Signature:                                  Company Name:
          -------------------------                      -----------------------

Printed Name:                               Address:
             ----------------------                 ----------------------------

Title:
      -----------------------------         Date:           Telephone
                                                 ---------           -----------

<PAGE>   22

                                 ATTACHMENT 4-3
                        UUDIRECT(SM) T3 TIERED SCHEDULE

<TABLE>
<CAPTION>
SERVICE(1)                     MONTHLY FEE              START-UP CHARGE(2)
----------                     -----------              ------------------
<S>                            <C>                      <C>
                                                               [***]
|_| 3 Mbps port                  [***]
|_| 6 Mbps port                  [***]
|_| 9 Mbps port                  [***]
|_| 12 Mbps port                 [***]
|_| 15 Mbps port                 [***]
|_| 18 Mbps port                 [***]
|_| 21 Mbps port                 [***]
|_| 24 Mbps port                 [***]
|_| 27 Mbps port                 [***]
|_| 30 Mbps port                 [***]
|_| 33 Mbps port                 [***]
|_| 36 Mbps port                 [***]
|_| 39 Mbps port                 [***]
|_| 45 Mbps port                 [***]
</TABLE>

PRICES ABOVE DO NOT INCLUDE ANY TELCO LINE CHARGES, EQUIPMENT COSTS(3), OR
NETWORK APPLICATIONS FEES.(4)

TERM COMMITMENT(5) Unless a different term is selected below, the term of this
Schedule will be coterminous with the Global Service Agreement as currently in
effect between Customer and MCI WORLDCOM, Inc. (the "GSA").

Customer shall receive a [***] off its monthly recurring charges on ports only.

                   PLEASE SIGN THIS SCHEDULE ON THE NEXT PAGE.

--------

1 Customer must provide 60 days' prior written notice to UUNET before
  downgrading service to a lower tier. While Customer can resell Internet
  connectivity, Customer cannot resell the service in its entirety to another
  person or entity without the express prior written consent of UUNET. If
  Customer resells Internet connectivity to end users, Customer is responsible
  for: (i) providing the first point of contact for end user support inquiries;
  (ii) providing software fulfillment to end users; (iii) running its own
  primary and secondary domain name service ("DNS") for end users; (iv)
  registering end users' domain names; (v) using BGP routing to the UUNET
  Network, if requested by UUNET; (vi) collecting route additions and changes,
  and providing them to UUNET; and (vii) registering with the appropriate agency
  all IP addresses provided by UUNET to Customer that are allocated to end
  users.

2 To ensure proper installation, UUNET will order all telco lines. A $500
  surcharge applies to Customer-ordered lines. Installation may be scheduled
  between the hours of 8AM and 7PM ET Monday through Friday (excluding
  holidays). If Customer requires installation outside of these hours UUNET will
  charge an additional $500 fee.

3 UUNET is acting only as a reseller with respect to the hardware and software
  offered under this Schedule ("Equipment"), which was manufactured by a third
  party ("Manufacturer"). UUNET will provide first level support for Equipment,
  but will not repair or replace Equipment. Customer's use of the Equipment is
  subject to the terms and conditions of the Manufacturer's end user agreement.
  Should Customer purchase Equipment from UUNET, UUNET will ship the current
  UUNET-tested version of the Equipment to the Customer.

4 Descriptions of the domain name, mail, news services, and other network
  applications available in connection with this service, and the pricing and
  additional terms applicable to these services, are set forth in the Network
  Applications Fee Schedule available at www.uu.net/terms. UUNET reserves the
  right to change the Network Applications Fee Schedule from time to time,
  effective upon posting of the changes to that URL or other notice to Customer.

5 Discount applicable only to Monthly Fee. At the conclusion of the Term
  Commitment, this Schedule shall continue in effect on a month-to-month basis
  at UUNET's then-current list price for the service.

*** Certain information on this page has been omitted and filed separately with
    the Commission. Confidential treatment has been requested with respect to
    the omitted portions.

<PAGE>   23

                         ADDITIONAL TERMS AND CONDITIONS

1.  UUNET Technologies, Inc. ("UUNET") exercises no control over, and accepts no
    responsibility for, the content of the information passing through UUNET's
    host computers, network hubs and points of presence (the "UUNET Network").
    EXCEPT AS EXPRESSLY SET FORTH IN SECTION 7 BELOW, UUNET (a) MAKES NO
    WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, FOR THE SERVICES AND
    EQUIPMENT IT IS PROVIDING, AND (b) DISCLAIMS ANY WARRANTY OF TITLE,
    MERCHANTABILITY, NON-INFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE. Use
    of any information obtained via the UUNET Network is at Customer's own risk.
    UUNET specifically denies any responsibility for the accuracy or quality of
    information obtained through its services. UUNET shall not be liable for any
    delay or failure in performance due to Force Majeure, which shall include
    without limitation acts of God, earthquake, labor disputes, changes in law,
    regulation or government policy, riots, war, fire, epidemics, acts or
    omissions of vendors or suppliers, equipment failures, transportation
    difficulties, or other occurrences which are beyond UUNET's reasonable
    control.

2.  All use of the UUNET Network and the service must comply with the
    then-current version of the UUNET Acceptable Use Policy ("Policy") which is
    made a part of this Schedule and is available at the following URL:
    www.uu.net/terms. UUNET reserves the right to amend the Policy from time to
    time, effective upon posting of the revised Policy at the URL or other
    notice to Customer. UUNET reserves the right to suspend the service or
    terminate this Schedule effective upon notice for a violation of the Policy.
    Customer agrees to indemnify and hold harmless UUNET from any losses,
    damages, costs or expenses resulting from any third party claim or
    allegation ("Claim") arising out of or relating to use of the service,
    including any Claim which, if true, would constitute a violation of the
    Policy.

3.  NEITHER PARTY SHALL BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
    PUNITIVE OR CONSEQUENTIAL DAMAGES THAT RESULT FROM CUSTOMER'S OR CUSTOMER'S
    USERS' USE OF THE UUNET NETWORK AND THE SERVICE INCLUDING, WITHOUT
    LIMITATION, ANY SUCH DAMAGES FOR LOSS OF DATA RESULTING FROM DELAYS,
    NON-DELIVERIES, MISDELIVERIES OR SERVICE INTERRUPTIONS. Notwithstanding
    anything to the contrary stated in this Schedule or in the GSA, Customer's
    sole remedies for any claims relating to this service or the UUNET Network
    are set forth in Section 7 below.

4.  Networks assigned from a UUNET net-block are non-portable. Network space
    allocated by UUNET must be returned to UUNET in the event Customer
    discontinues service.

5.  Payment terms shall be as set forth in the GSA. Fees paid by Customer under
    this Agreement for UUNET services will count towards Customer's Annual
    Minimum under its existing MCI WorldCom GSA. The amount to be applied will
    be that actually paid by Customer, net of any discounts or applicable
    credits, and excluding any amount paid for taxes or tax-like surcharges or
    fees.

6.  Billing for UUNET service will commence when a UUNET hub and a functioning
    telephone circuit are prepared to route IP packets to Customer's site. The
    Start-up Charge is invoiced upon acceptance of this Schedule by UUNET.
    Charges for Equipment shall be invoiced upon shipment. Service is invoiced
    monthly in advance, and may be canceled only by 60 days' advance written
    notice. In the event of early cancellation of a Term Commitment, Customer
    will be required to pay 75% of UUNET's standard Monthly Fee for each month
    remaining in the Term Commitment. UUNET reserves the right to change the
    rates by notifying Customer 60 days in advance of the effective date of the
    change.

7.  The Service Level Agreement ("SLA") for this service, which is made a part
    of this Schedule, is set forth at www.uu.net/terms and applies only to
    customers agreeing to a Term Commitment of at least one year. UUNET reserves
    the right to amend the SLA from time to time effective upon posting of the
    revised SLA to the URL or other notice to Customer; provided, that in the
    event of any amendment resulting in a material reduction of the SLA's
    service levels or credits, Customer may terminate this Schedule without
    penalty by providing UUNET written notice of termination during the 30 days
    following notice of such amendment. The SLA sets forth Customer's sole
    remedies for any claim relating to this service or the UUNET Network,
    including any failure to meet any guarantee set forth in the SLA. UUNET's
    records and data shall be the basis for all SLA calculations and
    determinations. Notwithstanding anything to the contrary, the maximum amount
    of credit in any calendar month under the SLA shall not exceed the Monthly
    Fee and/or Start-up Charge which, absent the credit, would have been charged
    for UUNET service that month (collectively the "UUNET Fees"); provided, that
    the maximum amount of credit for failure to meet the Availability Guarantee
    shall not exceed the sum of (a) the UUNET Fees, plus (b) the telephone
    company line charge which, absent the credit, would have been charged for
    such month.

8.  Neither party may use the other party's name, trademarks, tradenames or
    other proprietary identifying symbols without the prior written approval of
    the other party. Neither party may assign or transfer any of its rights or
    obligations under this Schedule without the express, prior written consent
    of the other party; provided, that either party may assign or transfer this
    Schedule to any affiliate of such party upon advance written notice to the
    other party. No failure on the part of either party to exercise, and no
    delay in exercising, any right or remedy hereunder shall operate as a waiver
    thereof nor shall any single or partial exercise of any right or remedy

<PAGE>   24

    hereunder preclude any other or further exercise thereof or the exercise of
    any other right or remedy granted hereby or by law.

9. MCI WORLDCOM, Inc. or its affiliates or subcontractors may perform some or
   all of UUNET's duties and/or obligations hereunder.

10. This Schedule is in addition to and subject to the GSA. To the extent this
    Schedule conflicts with any provision of the GSA, this Schedule shall
    prevail. Activation of service shall indicate UUNET's acceptance of this
    Schedule. Use of the UUNET Network constitutes acceptance of this Schedule.
    AGREED AND ACCEPTED BY CUSTOMER:

Signature:                                  Company Name:
          -------------------------                      -----------------------

Printed Name:                               Address:
             ----------------------                 ----------------------------

Title:                                      Date:
      -----------------------------              -------------------------------<PAGE>   1
                                  Exhibit 10.33

AT&T

                          AT&T Master Carrier Agreement

<TABLE>
<S>                                     <C>                                     <C>
CUSTOMER Name (Full Legal Name):                                                AT&T Sales Representative:
Universal Access, Inc                   AT&T Corp.,                             Doug Marshall
                   ("CUSTOMER")              a New York corporation ("AT&T")

CUSTOMER Name (and Title) for Notice:   AT&T Name (and Title) for Notice:       AT&T Contact Telephone Number:
                   Pam Whitehead        Carol Hawkins                           314 275 3086

CUSTOMER Address:                       AT&T Address:                           Initial Deposit Amount Required:
100 N. Riverside Plaza                  300 Atrium Drive                        [***]
Suite 2200                              Room 3W101

City          State       Zip Code      City       State      Zip Code
Chicago       IL          60606         Somerset   NJ         08873

CUSTOMER Fax number for Notice:         AT&T Fax number for Notice:
312 660 5050                            732 805 5727
</TABLE>

This Master Carrier Agreement shall be legally binding when signed by both
parties and shall continue in effect until the end of the longest term specified
in the Attachment(s), or until otherwise terminated as provided in accordance
with this Agreement. The rates and commitments provided in the Attachments shall
be effective as provided in each Attachment.

This Master Carrier Agreement consists of this Cover Sheet, the attached Terms
and Conditions, and the Attachment(s) listed below (these documents together are
collectively referred to as the "Agreement"). In the event of any inconsistency
between these documents, precedence will be given to the documents in the
following order: (1) this Cover Sheet; (2) Attachment(s); (3) the Terms and
Conditions. In the event of any inconsistency between the terms of this
Agreement and the terms of an applicable Tariff, the terms of the Agreement
shall prevail.

<TABLE>
<CAPTION>
TITLE                                                    Doc. ID             Date/time stamp
-----                                                    -------             ---------------
<S>                                                    <C>                   <C>
Master Carrier Agreement - Terms and Conditions        MCA 990816.doc        08/16/99 3:42 pm
Supplemental Terms and Conditions                      MCA_supp.doc          8/17/1999 11:02
                                                                                   AM
Data Service Terms and Pricing                         UAccess-D990902.doc   9/2/1999 10:55AM
</TABLE>

CUSTOMER'S SIGNATURE BELOW ACKNOWLEDGES THAT CUSTOMER HAS READ, UNDERSTANDS AND
AGREES TO EACH OF THE TERMS AND CONDITIONS OF THIS AGREEMENT AND THAT THE
INDIVIDUAL SIGNING THIS AGREEMENT IS DULY AUTHORIZED TO DO SO.

CUSTOMER                                     AT&T Corp.

By: /s/ ROBERT J. POMMER                     By: /s/ JAMES M. DOWNEY, JR.
    -------------------------------              -------------------------------
    (Authorized Customer Signature)             (Authorized AT&T Signature)

Robert J. Pommer                             James M. Downey, Jr.
-----------------------------------          -----------------------------------
(Typed or Printed Name and Title)            (Typed or Printed Name and Title)

Date: 9/27/99                                Date: 10/12/99
      -------                                      -----------------------------

----------
[***]   Certain information on this page has been omitted and filed separately
        with the Commission. Confidential treatment has been requested with
        respect to the omitted portions.

Not for Publication - All Rights Reserved
<PAGE>   2

                MASTER CARRIER AGREEMENT - TERMS AND CONDITIONS           Page 1

1. PROVISION OF SERVICES. CUSTOMER hereby orders and AT&T hereby agrees to
provide the AT&T services described in the Attachment(s) to this Agreement (the
"Services"). Jurisdictionally intrastate services may be provided pursuant to an
Attachment to this Agreement, pursuant to applicable state tariffs, or as
otherwise permitted by applicable state law. AT&T is not responsible for the
quality of transmission or signaling on CUSTOMER's side of the network interface
between AT&T and CUSTOMER. Service is furnished subject to the availability of
the service components required, and subject to operational and systems
constraints.

2. BILLING AND PAYMENT FOR THE SERVICES. Except as may be provided in an
Attachment, AT&T will send a single monthly bill for each of the Services to one
location designated by CUSTOMER. CUSTOMER is liable for all amounts due to AT&T
under this Agreement. Payment is due upon presentation of a bill. Payment will
be considered timely if made to AT&T within thirty days after the bill date (for
voice services, the bill date is the day after the end of the usage period
covered by the bill; for data services, the bill date is the first day of the
service period covered by the bill). Any charges not paid to AT&T within such
period will be considered past due.

3. NON-PAYMENT. At AT&T's option, interest charges may be added to any past due
amounts at the lower of 12.0% per year or the maximum rate allowed by law.
CUSTOMER shall reimburse AT&T for reasonable attorney's fees and any other costs
associated with collecting delinquent or dishonored payments. Restrictive
endorsements or other statements on checks accepted by AT&T will not apply.

4. BILLING DISPUTES. If CUSTOMER wishes to dispute a charge on a bill, CUSTOMER
must identify the specific charge in dispute and provide a full written
explanation of the basis for the dispute using a standard AT&T billing dispute
form within 90 days after the bill date. CUSTOMER may withhold payment of a
charge subject to a good faith dispute provided: (a) CUSTOMER submits the
billing dispute, using a standard AT&T billing dispute form, before making
payment of the disputed charge; (b) CUSTOMER pays the undisputed portion of all
charges; and (c) CUSTOMER cooperates reasonably with AT&T's efforts to
investigate and resolve the dispute. If AT&T determines that a disputed charge
was billed in error, AT&T shall issue a credit to reverse the amount incorrectly
billed. If AT&T determines that a disputed charge was billed correctly, payment
shall be due from CUSTOMER within five days after AT&T advises CUSTOMER in
writing that the dispute is denied.

5. DEPOSITS. Using its Deposit standards, AT&T has assessed and CUSTOMER shall
pay the Initial Deposit amount specified on the Cover Sheet before Services are
provided. AT&T may require CUSTOMER, during the term of this Agreement, to
tender a deposit in an amount to be determined by AT&T in its reasonable
discretion. AT&T will rely upon commercially reasonable factors to determine the
need for and amount of any deposit. These factors may include, but are not
limited to, payment history, number of years in business, history of service
with AT&T, bankruptcy history, current account treatment status, financial
statement analysis, and commercial credit bureau rating, as well as commitment
levels and anticipated monthly charges. Any deposit will be held by AT&T as a
guarantee for the payment of charges (including but not limited to potential
shortfall charges). A deposit does not relieve CUSTOMER of the responsibility
for the prompt payment of bills. Interest (at the rate of 6% per year) will be
paid to CUSTOMER for any period that a cash deposit is held by AT&T. A failure
of CUSTOMER to post a deposit as required by AT&T pursuant to this paragraph
shall constitute a material breach of this Agreement by CUSTOMER.

6. OBLIGATIONS REGARDING TAXES. CUSTOMER shall pay any applicable local, state
and federal taxes, levied upon the sale, installation, use or provision of the
Services, except to the extent customer provides a valid tax exemption
certificate to AT&T prior to the delivery of Services. Gross Receipts Taxes will
be charged to CUSTOMER as provided in AT&T Tariff F.C.C. No. 1, Section 2.5.14,
as amended from time to time.

7. CUSTOMER IS A CARRIER. CUSTOMER certifies it is a "common carrier" as defined
in the Communications Act of 1934 (see sections 153(10) and 211), with all
required state and federal operating authority.

8. RESPONSIBILITIES OF CUSTOMER. CUSTOMER is responsible for interfacing and
communicating with its End Users, for placing any orders, and for assuring that
it and its Intermediate Resellers (if any) comply with the provisions of this
Agreement and with all applicable federal and state laws and regulatory
requirements with respect to the resale of Services provided under this
Agreement. CUSTOMER is responsible for arranging premises access at any
reasonable time so that AT&T personnel may install, repair, maintain, inspect or
remove service components.

9. ABUSE OF SERVICE. The abuse of Service is prohibited. Using Service or
permitting Service to be used in the following ways constitutes abuse: (a)
making calls that might reasonably be expected to frighten, abuse, torment, or
harass another; (b) carrying calls that originate on the network of a
facilities-based interexchange carrier other than AT&T and terminate
disproportionately to domestic locations for which AT&T's cost of terminating
switched access (based on the published access rates of the incumbent local
exchange companies) is above AT&T's price for the call under this Agreement
(after application of discounts); (c) interfering unreasonably with the use of
AT&T service by others or the operation of the AT&T network; (d) subjecting AT&T

Not for Publication - All Rights Reserved
<PAGE>   3

                MASTER CARRIER AGREEMENT - TERMS AND CONDITIONS           Page 2

personnel or non-AT&T personnel to hazardous conditions; (e) transmitting any
message or code, locating a person, or otherwise giving or obtaining
information, without payment for the Services; or (f) attempting to avoid the
payment, in whole or in part, of any charges by any means or device (non-payment
of billed charges will not be considered abuse of service for purposes of this
Section). In any instance in which AT&T believes in good faith that there is
abuse of Service as set forth above, AT&T may immediately restrict, suspend or
discontinue providing Service, without liability on the part of AT&T, and then
notify CUSTOMER of the action that AT&T has taken and the reason for such
action. To the extent doing so does not interfere with its ability to prevent
abuse of Service (to be determined in AT&T's reasonable judgment), AT&T will
attempt to limit any restriction, suspension or discontinuance under this
Section to the locations, phone numbers, or Services with respect to which the
abuse is taking place.

10. DEFAULT. If a party breaches any material term of this Agreement and the
breach continues unremedied for 60 days after written notice of default, the
other party may terminate for cause any Attachment materially affected by the
breach. If CUSTOMER is in breach of its payment obligations (including failure
to pay a required deposit), and fails to make payment in full within 5 days
after receipt of written notice of default, AT&T may, at its option, terminate
the Agreement, terminate affected Attachments, suspend Service under the
affected Attachments, and/or require a deposit, advanced payment, or other
satisfactory assurances in connection with any or all Attachments as a condition
of continuing to provide Services; except that AT&T will not take any such
action as a result of CUSTOMER's non-payment of a charge subject to a timely
billing dispute, unless AT&T has reviewed the dispute and determined that the
charge is correct. An Attachment may be terminated by either party immediately
upon written notice if the other party has become insolvent or involved in a
liquidation or termination of its business, or adjudicated bankrupt, or been
involved in an assignment for the benefit of its creditors. CUSTOMER shall be
liable to AT&T for Termination Charges, as specified in a terminated Attachment,
in the event that AT&T terminates an Attachment as a result of a breach by
CUSTOMER. Termination by either party of an Attachment does not waive any other
rights or remedies it may have under this Agreement.

11. NO WARRANTIES. AT&T MAKES NO WARRANTIES, EXPRESS OR IMPLIED, UNDER THIS
AGREEMENT AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. AT&T DOES NOT WARRANT THAT THE SERVICES WILL BE
UNINTERRUPTED OR ERROR-FREE, OR THAT THE SERVICES WILL MEET CUSTOMER'S
REQUIREMENTS OR THAT THE SERVICES WILL PREVENT UNAUTHORIZED ACCESS BY THIRD
PARTIES. AT&T DOES NOT AUTHORIZE ANYONE TO MAKE A WARRANTY OF ANY KIND ON ITS
BEHALF AND CUSTOMER SHOULD NOT RELY ON ANYONE MAKING SUCH STATEMENTS.

12. LIMITATION OF LIABILITY. THE LIABILITY OF AT&T ASSOCIATED WITH THE
INSTALLATION, PROVISION, USE, MAINTENANCE, REPAIR, TERMINATION OR RESTORATION OF
SERVICE PROVIDED PURSUANT TO THIS AGREEMENT SHALL NOT EXCEED AN AMOUNT EQUAL TO
THE INITIAL PERIOD CHARGE FOR AFFECTED CALLS (FOR CALLS SUBJECT TO MEASURED
CHARGES) OR THE CHARGES FOR AFFECTED SERVICE FOR THE PERIOD DURING WHICH THAT
SERVICE WAS AFFECTED (FOR ALL OTHER SERVICES). IN NO EVENT SHALL AT&T BE LIABLE
FOR: (A) ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, RELIANCE OR SPECIAL
DAMAGES, INCLUDING WITHOUT LIMITATION DAMAGES FOR LOST PROFITS, ADVANTAGE,
SAVINGS OR REVENUES OF ANY KIND, OR INCREASED COST OF OPERATIONS, WHETHER OR NOT
AT&T HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES; OR (B) ANY CLAIM OR
DAMAGES CAUSED BY OR ARISING OUT OF (i) ANY ACT OR OMISSION (INCLUDING WITHOUT
LIMITATION UNAUTHORIZED USE, THEFT, OR ALTERATION OF SERVICE, OR INTERFERENCE
WITH SERVICE) BY CUSTOMER, AN INTERMEDIATE RESELLER, AN END USER, OR ANOTHER
THIRD PARTY, (ii) SERVICE INTERRUPTIONS, OR (iii) INTEROPERABILITY, INTERACTION
OR INTERCONNECTION OF THE SERVICES PROVIDED UNDER THIS AGREEMENT WITH
APPLICATIONS, EQUIPMENT, SERVICES OR NETWORKS PROVIDED BY CUSTOMER OR THIRD
PARTIES. THE LIMITATIONS OF LIABILITY SET FORTH IN THIS AGREEMENT SHALL SURVIVE
FAILURE OF AN EXCLUSIVE REMEDY, AND SHALL APPLY REGARDLESS OF THE FORM OF
ACTION, WHETHER IN CONTRACT, TORT, WARRANTY, STRICT LIABILITY, OR NEGLIGENCE
(INCLUDING WITHOUT LIMITATION ACTIVE AND PASSIVE NEGLIGENCE).

13. FORCE MAJEURE. Neither party nor its Affiliates, subsidiaries, or
subcontractors shall be liable to the other party for any delay, failure in
performance, loss or damage due to force majeure conditions such as fire,
explosion, power blackout, earthquake, volcanic action, flood, hurricane, the
elements, strike, embargo, labor disputes, civil or military authority, war,
acts of God, acts or omissions of other carriers (except, for CUSTOMER, the acts
of omissions of its Intermediate Resellers), acts of regulatory or governmental
agencies, or other causes beyond their reasonable control, except that
CUSTOMER's obligation to pay for services provided

Not for Publication - All Rights Reserved
<PAGE>   4

                MASTER CARRIER AGREEMENT - TERMS AND CONDITIONS           Page 3

shall not be excused. Changes in economic, business or competitive conditions
are not force majeure conditions. If CUSTOMER is unable to meet its commitments
as a direct result of a force majeure condition, CUSTOMER may suspend its
commitments for one full billing month (or longer, with AT&T's written consent,
which shall not be unreasonably withheld). The effect of such a suspension of
commitment will be to exclude the affected month(s) from all calculations
affecting the CUSTOMER's commitments and to extend the term of this Agreement by
the same number of months. CUSTOMER must provide notice to AT&T of the force
majeure condition giving rise to the right to suspend commitments within 30 days
after its occurrence.

14. INDEMNIFICATION. CUSTOMER shall indemnify, defend, and hold harmless AT&T
and its directors, officers, employees, agents, subsidiaries, affiliates,
successors and assigns from any and all claims, damages and expenses whatsoever
(including reasonable attorneys' fees) arising on account of or in connection
with CUSTOMER's use, resale or sharing of the Services provided under this
Agreement, including but not limited to: (a) claims for libel, slander, invasion
of privacy; (b) claims for infringement of copyright arising from any
communication; (c) claims arising from any failure, breakdown, interruption or
deterioration of service provided by AT&T to CUSTOMER or by CUSTOMER to End
Users or Intermediate Resellers; (d) claims arising from CUSTOMER's marketing
efforts, including but not limited to CUSTOMER's violation of laws and
regulations applicable to the authorization and proof of authorization necessary
to convert an End User to CUSTOMER's service; and (e) claims of patent
infringement arising from combining or using services or equipment furnished by
AT&T in connection with services or equipment furnished by others. AT&T shall
indemnify, defend, and hold harmless CUSTOMER and its directors, officers,
employees, agents, subsidiaries, affiliates, successors, and assigns from all
claims of patent infringement arising solely from the use of the Services.
CUSTOMER's indemnification obligations do not apply to claims for damages to
real or tangible personal property or for bodily injury or death negligently
caused by AT&T.

15. USE OF MARKS. Nothing in this Agreement creates in a party any rights in the
other party's trade names, trademarks, service marks or any other intellectual
property. Either party may use the other party's trade names, trademarks, or
service marks only to the extent such use is not prohibited by this Agreement
and is otherwise permitted by law (including but not limited to the Lanham Act).
In no event shall either party use or display, in advertising or otherwise, any
of the other party's logos, trade dress, trade devices or other indicia of
origin, or any confusingly similar logos, trade dress, trade devices or indicia
of origin. CUSTOMER will not conduct business under any AT&T corporate or trade
name, trademark, service mark, logo, trade dress, trade device, indicia of
origin or other symbol that serves to identify and distinguish AT&T from its
competitors, or under any confusingly similar corporate or trade name,
trademark, service mark, logo, trade dress, trade device, indicia of origin or
other symbol. CUSTOMER will not indicate or imply to any other party that
CUSTOMER is affiliated with AT&T, that CUSTOMER is authorized by AT&T to sell or
provide service to them, that CUSTOMER is providing (or will provide) service to
such party jointly or in collaboration or partnership with AT&T, or as the agent
of AT&T, or that service provided by CUSTOMER or another carrier is provided by
AT&T. Except to the limited extent (if any) as may be required under law,
neither CUSTOMER nor an Intermediate Reseller shall indicate or imply to any
existing or potential End User (or Intermediate Reseller) that any portion of
the service provided to the End User (or Intermediate Reseller) by CUSTOMER or
the Intermediate Reseller is provided by AT&T or is carried over the AT&T
network or AT&T facilities.

16. RELATIONSHIP OF THE PARTIES. The relationship between the parties shall be
that of independent contractors and not of principal and agent, employer and
employee, franchiser and franchisee, partners or joint venturers. This Agreement
does not establish CUSTOMER as a dealer, distributor or franchisee of AT&T, and
no fee is being paid to AT&T to enter into this Agreement.

17. ACKNOWLEDGMENT OF RIGHT TO COMPETE. Each party acknowledges that nothing in
this Agreement diminishes or restricts in any way the rights of the parties to
engage in competition with each other. Each party acknowledges that it remains
at all times solely responsible for the success and profits of its own business.

18. USE OF MARKETING INFORMATION. Either party may use for its own marketing
purposes any and all information that it lawfully obtains from sources other
than the other party, including but not limited to information that either party
may have as a result of the sale by that party of telecommunications services or
equipment to End Users.

19. CONFIDENTIAL INFORMATION DEFINED. "Confidential Information" consists of the
following: all information disclosed by one party or its agent or representative
(the "Disclosing Party") to the other party or its agent or representative (the
"Receiving Party") in connection with this Agreement regarding the
telecommunications needs of CUSTOMER and/or the telecommunications offerings of
AT&T, to the extent that (a) for information disclosed in written, graphic or
other tangible form, it is designated by appropriate markings to be confidential
or proprietary or (b) for information disclosed orally, it is both identified as
proprietary or confidential at the time of disclosure and

Not for Publication - All Rights Reserved
<PAGE>   5

                MASTER CARRIER AGREEMENT - TERMS AND CONDITIONS           Page 4

summarized in a writing so marked within 15 business days following the oral
disclosure. Notwithstanding the foregoing, all written or oral pricing,
contract, and tariff proposals exchanged between the parties shall be
Confidential Information, whether or not so designated. Confidential Information
is the property of the Disclosing Party and shall be returned to the Disclosing
Party upon request. This Agreement is Confidential Information as to which each
party is both a Disclosing Party and a Receiving Party. Information made known
to the public by the Disclosing Party or a third party, or previously known to
the Receiving Party free of any obligation to keep it confidential, or
independently developed by the Receiving Party, shall not be Confidential
Information.

20. CONFIDENTIALITY OBLIGATIONS. A Receiving Party shall hold all Confidential
Information in confidence from the time of disclosure until at least 2 years
following the termination of this Agreement. During that period, the Receiving
Party: (a) shall use such Confidential Information only for the purposes of
performing this Agreement and using the Services; (b) shall reproduce such
Confidential Information only to the extent necessary for such purposes; (c)
shall restrict disclosure of such Confidential Information to employees that
have a need to know for such purposes; (d) shall advise those employees of the
obligations of this Agreement; (e) shall not disclose Confidential Information
to any third party without prior written approval of the Disclosing Party except
as expressly provided in this Agreement; and (f) shall use at least the same
degree of care (in no-event less than reasonable care) as it uses with regard to
its own proprietary or confidential information to prevent the disclosure,
unauthorized use or publication of Confidential Information.

21. PUBLICITY. No public statements or announcements relating to this Agreement
shall be issued by either party without the prior written consent of the other
party.

22. ALTERNATIVE DISPUTE RESOLUTION. The parties will attempt to settle any claim
for non-payment of charges or recovery of overpayment of charges for the
Services provided under this Agreement (hereinafter a "Billing Dispute"),
through good faith negotiations. The parties may agree to submit a Billing
Dispute to non-binding mediation. At any time, the party seeking payment may
submit a notice of arbitration of a Billing Dispute for arbitration under the
United States Arbitration Act pursuant to the terms of this Section and the
Non-Administered Arbitration Rules of the CPR Institute for Dispute Resolution
("CPR"), to the extent such rules do not conflict. The Arbitration will be held
in New York, New York, or any other location selected by mutual agreement of the
parties. The arbitrator shall not have the power to award any damages in excess
of the limits set forth in or excluded under the limitations of liability
provided in this Agreement. The arbitrator may not limit, expand or otherwise
modify the terms of this Agreement. The arbitrator shall strictly limit
discovery to the production of documents directly relevant to the facts alleged
in the notices of arbitration and defense. If depositions are required, the
arbitrator shall permit each Party to conduct an equal number of depositions
(not to exceed five per side), with equal limits on the number of deposition
hours for each Party (not to exceed 7 per deposition). If an evidentiary hearing
is held, each Party's presentation of its case shall be limited to three (3)
days. Requests for temporary injunctive relief may be submitted to a court of
competent jurisdiction if the arbitrator has not yet been appointed, but the
arbitrator shall have the authority to modify any injunctive relief granted by
such a court. The arbitration award shall be made final within eight months of
filing of the notice of arbitration and judgment upon the award may be entered
in any court having competent jurisdiction. All participants and the arbitrator
shall hold the existence, content and results of mediation and arbitration in
confidence, except as necessary to enforce a final settlement agreement or to
enforce an arbitration award. Each party shall bear its own expenses and equally
share expenses related to the compensation of the arbitrator. The arbitrator's
award shall be in writing and shall state the reasons for the award.

23. TIME TO BRING CLAIMS. Any initial demand for arbitration pursuant to this
Agreement, and any legal action arising under this Agreement, must be initiated
within two years after the cause of action arises.

24. NOTICES. All notices under this Agreement shall be in writing and shall be
made: (a) by personal delivery; (b) by certified or registered mail, postage
prepaid return receipt requested, (c) by overnight delivery, or (d) by facsimile
transmission. Notice shall be sent to the individuals identified on the Cover
Sheet (at the address and/or fax number designated for notice), or to such other
individual, address or fax number as a party may designate by notice to the
other party.

25. EQUIPMENT. AT&T shall retain title to all of its equipment and facilities
used to provide service under this Agreement. CUSTOMER is liable to AT&T for the
replacement cost of any AT&T-provided equipment installed at CUSTOMER's premises
in the event of loss of said equipment for any reason, including but not limited
to theft.

26. EXPORT REGULATIONS. The parties acknowledge that any products, software, and
technical information (including, but not limited to, services and training)
provided under this Agreement are subject to U.S. export laws and regulations
and any use of or transfer of such products, software and technical information
must be authorized under those regulations. CUSTOMER agrees that it will not use
distribute, transfer or transmit the products, software or technical information
(even if incorporated into other products) except in compliance

Not for Publication - All Rights Reserved
<PAGE>   6

                MASTER CARRIER AGREEMENT - TERMS AND CONDITIONS           Page 5

with U.S. export regulations. If requested by AT&T, CUSTOMER also agrees to sign
written assurances and other export-related documents as may be required for
AT&T to comply with U.S. export regulations.

27. QUALITY MONITORING. CUSTOMER authorizes AT&T to monitor and record calls to
AT&T concerning the Services for training and quality control purposes.

28. ASSIGNMENT. This Agreement may not be assigned by either party except that
either party may assign its rights or delegate its duties under this Agreement
to an Affiliate of that party.

29. NO THIRD PARTY BENEFICIARIES. This Agreement does not expressly or
implicitly provide any third party (including End Users) with any remedy, claim,
liability, reimbursement, cause of action or other right or privilege.

30. NON-WAIVER. The failure of a party to enforce any right under this Agreement
at any particular point in time shall not constitute a continuing waiver of any
such right with respect to the remaining term of this Agreement, or the waiver
of any other right under this Agreement.

31. SEVERABILITY. If any portion of this Agreement is found to be invalid or
unenforceable, the remaining provisions shall remain in effect and the parties
shall immediately begin negotiations to replace any invalid or unenforceable
portions that are essential parts of this Agreement.

32. SURVIVAL OF TERMS. The rights and obligations of either party that by their
nature would continue beyond the termination or expiration of this Agreement
shall survive termination or expiration of this Agreement. For example, the
provisions of this Agreement regarding Confidentiality shall remain in effect
for 2 years following termination of this Agreement and the provisions of this
Agreement regarding arbitration, indemnification, and/or limitation of liability
shall survive termination of this Agreement as to any cause of action arising
under the Agreement.

33. CHOICE OF LAW. The domestic law of the State of New York, except its
conflict-of-laws rules, shall govern the construction, interpretation, and
performance of this Agreement, except to the extent superceded by federal law.

34. AMENDMENT. No amendment, supplement, modification or waiver of any provision
of this Agreement shall be effective unless in writing and signed by authorized
representatives of both parties.

35. ENTIRE AGREEMENT. This Agreement constitutes the entire agreement between
the parties with respect to the Services. This Agreement supersedes all prior
agreements, proposals, representations, statements or understandings, whether
written or oral, concerning the Services or the parties' rights or obligations
relating to the Services. Any prior representations, promises, inducements or
statements of intent regarding the Services that are not embodied in this
Agreement are of no effect.

36. DEFINITIONS. The following definitions apply in addition to the definitions
set forth elsewhere in this Agreement:

"Affiliate" - any entity that controls, is controlled by or is under common
control with a party.

"End User" - the entity that actually uses the service resold by CUSTOMER.

"Intermediate Reseller" - any reseller or other intermediary (other than
CUSTOMER or its agents or employees) In the sales chain between CUSTOMER and an
End User.

"Tariff" - the AT&T Tariffs identified in the Attachments; and the successor
documents of general applicability that replace such tariffs in the event of
detariffing.

If not otherwise defined, capitalized terms shall be defined as provided in
AT&T's Tariffs.

                           End of Terms and Conditions

Not for Publication - All Rights Reserved
<PAGE>   7

Supplemental Terms and Conditions                                    Page 1 of 1

                   ATTACHMENT TO AT&T MASTER CARRIER AGREEMENT

CUSTOMER Name (Full Legal Name): Universal Access, Inc.

Date of execution of Master Carrier Agreement:
                                             /s/ ROBERT J. POMMER
                                                  (by CUSTOMER)
                                              --------------------

                                              /s/ JAMES M. DOWNEY, JR. (by AT&T)
                                              --------------------

The Terms and Conditions of the AT&T Master Carrier Agreement are hereby revised
as follows:

1. The second sentence of SECTION 10 is amended with the following italicized
language:

               If CUSTOMER is in breach of its payment obligations (including
               failure to pay a required deposit), and fails to make payment in
               full within ten (10) days after receipt of written notice of
               default...

3. The last sentence of SECTION 14 is amended to add the following at the end of
the sentence:

               ...its employees, agents, subsidiaries, affiliates, successors
               and assigns.

4. The following sentence is added at the end of SECTION 22:

               This Section shall not limit a party's right to commence legal
               action with respect to any dispute that does not concern a
               Billing Dispute.

                                End of Attachment

Not for Publication - All Rights Reserved
<PAGE>   8

Data Service Terms and Pricing                                      Page 1 of 11

                   ATTACHMENT TO AT&T MASTER CARRIER AGREEMENT

CUSTOMER Name (Full Legal Name): Universal Access, Inc.

Date of execution of Master Carrier Attachment:
                                              /s/ ROBERT J. POMMER
                                              --------------------

                                              /s/ JAMES M. DOWNEY, JR. (by AT&T)
                                              --------------------

1.      SERVICES PROVIDED. AT&T will provide the following Services to CUSTOMER
        under this Attachment and pursuant to the terms of the Master Carrier
        Agreement and the applicable Tariffs specified below.

        A.     AT&T PRIVATE LINE SERVICES. AT&T Private Line Services (AT&T
               Tariff F.C.C. No. 9, as amended from time to time) consisting of:

               1.     AT&T ACCUNET(R) Spectrum of Digital Services

               2.     AT&T DATAPHONE Digital Service

               3.     AT&T ACCUNET T1.5 Service

               4.     AT&T ACCUNET T45 Service

               5.     AT&T ACCUNET Fractional T45 Service

               6.     AT&T ACCUNET SONET T155 Service

               7.     AT&T International ACCUNET Spectrum of Digital
                      Services-Canada

               8.     AT&T International ACCUNET Spectrum of Digital
                      Services-Mexico

               9.     AT&T International ACCUNET T1.5 Service-Canada

               10.    AT&T International ACCUNET T1.5 Service-Mexico

               11.    AT&T International DATAPHONE Digital Service-Canada

               12.    AT&T International DATAPHONE Digital Service-Mexico

               13.    AT&T International ACCUNET Digital Services

               14.    AT&T International ACCUNET Digital Direct Link Service

               15.    AT&T International ACCUNET 2.048 Mbps Service-Mexico

Not for Publication - All Rights Reserved
<PAGE>   9

Data Service Terms and Pricing                                      Page 2 of 11

               16.    AT&T International ACCUNET T45 Service-Canada

               17.    AT&T International ACCUNET T45 Service-Overseas

        B.     AT&T 1.544 MBPS ECHO CANCELLATION - AT&T 1.544 Mbps Echo
               Cancellation is an Office Function providing non-frequency
               selective echo cancellation in AT&T's central office to improve
               the quality of an AT&T T1.5 Inter Office Channel used for voice
               transmissions. Echo cancellation is disruptive to data
               transmissions, and is only available on an AT&T T1.5 Inter Office
               Channel that is designated by CUSTOMER for use for voice
               transmissions.

        C.     AT&T LOCAL CHANNEL SERVICES. AT&T Local Channel Services (AT&T
               Tariff F.C.C. No.11, as amended from time to time) consisting of:

               1.     AT&T TERRESTRIAL 1.544 Mbps Local Channel Services

               2.     AT&T TERRESTRIAL 45 Mbps Local Channel Services

               3.     AT&T Voice Grade Local Channel Service

               4.     AT&T Digital Data Local Channel Service

               5.     AT&T ACCUNET Generic Digital Access Services

        D.     AT&T SATELLITE SERVICES (AT&T Tariff F.C.C. No. 7, as amended
               from time to time) consisting of:

               1.     AT&T International Satellite Shared Earth Station Service

               2.     AT&T International Satellite Shared Earth Station Direct
                      Link Service

        E.     AT&T INTERSPAN(R) FRAME RELAY SERVICES. AT&T InterSpan Frame
               Relay Services (AT&T Tariff F.C.C. No. 4, as amended from time to
               time) consisting of:

               1.     AT&T InterSpan Frame Relay Service

               2.     AT&T International InterSpan Frame Relay Service

2.      TERM. The Term of this Attachment is 36 Months. This Attachment will
        be extended for additional 12 Months upon CUSTOMER's written request to
        AT&T 60 days prior to this Attachment expiration date. For each service
        provided under this Attachment, the Term begins on the first day of the
        first full billing month for the first service provided under this
        Attachment, which day is referred to as the Customer's Initial Service
        Date (CISD). Different Services may have different billing cycles, and
        so the billing months may be

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<PAGE>   10

Data Service Terms and Pricing                                      Page 3 of 11

        staggered. For each service, however, the Term will begin within one
        month after the Term begins for the first service provided under this
        Agreement.

3.      MINIMUM REVENUE COMMITMENTS (MRC). The following Minimum Revenue
        Commitments apply under this Attachment. For each Minimum Revenue
        Commitment, CUSTOMER commits that the Eligible Charges it incurs during
        each Commitment Period will equal or exceed the amount of the
        commitment. If CUSTOMER fails to meet any Minimum Revenue Commitment in
        a Commitment Period, then CUSTOMER will pay a Shortfall Charge equal to
        the difference between the Minimum Revenue Commitment and the amount of
        Eligible Charges for that Minimum Revenue Commitment incurred during the
        Commitment Period. If CUSTOMER is in shortfall of the MRC by an amount
        less than or equal to the revenues associated with pending uninstalled
        orders, and such pending orders are not delayed due to the fault of
        CUSTOMER or its end-user, then AT&T agrees to consider granting
        temporary relief of the MRC.

        A.     ADJUSTABLE MINIMUM MONTHLY REVENUE COMMITMENTS (MMRCS).

               1.     At any time during the Term, CUSTOMER may elect to
                      increase any Adjustable MMRC to an amount that is less
                      than or equal to the CUSTOMER's billed MMRC Eligible
                      Charges for the most recent billing month, by providing
                      written notice to AT&T at least 30 days prior to the
                      beginning of the billing month for which the new MMRC will
                      apply.

        B.     ADJUSTABLE PRIVATE LINE AND SATELLITE MMRC.

               1.     For Months 1 through 6 of the Term, the initial Private
                      Line and Satellite MMRC is $0.0 Dollars. Beginning in
                      Month 7 through Month 36 of the Term, the initial Private
                      Line and Satellite MMRC is $250,000 Dollars. The Private
                      Line and Satellite MMRC is an adjustable MMRC described
                      above. Each month of the Term is a Commitment Period.

               2.     The Private Line and Satellite MMRC applies to the
                      following Services provided under this Attachment, except
                      it does not apply to Services to which another Adjustable
                      MMRC applies under this Attachment.

                      (a)    Services provided under this Agreement that if
                             provided under AT&T Tariff F.C.C. No. 9 would be
                             eligible to receive discount under the AT&T Tariff
                             F.C.C. No. 9 Multiservice Volume Pricing Plan

                      (b)    AT&T ACCUNET SONET T155 Service;

                      (c)    AT&T International ACCUNET Spectrum of Digital
                             Services-Canada

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Data Service Terms and Pricing                                      Page 4 of 11

                      (d)    AT&T International ACCUNET Spectrum of Digital
                             Services-Mexico

                      (e)    AT&T International ACCUNET T1.5 Service-Canada

                      (f)    AT&T International ACCUNET T1.5 Service-Mexico

                      (g)    AT&T International DATAPHONE Digital Service-Canada

                      (h)    AT&T International DATAPHONE Digital Service-Mexico

                      (i)    AT&T International ACCUNET Digital Services

                      (j)    AT&T International ACCUNET Digital Direct Link
                             Service

                      (k)    AT&T International ACCUNET 2.048 Mbps
                             Service-Mexico

                      (l)    AT&T International ACCUNET T45 Service-Canada

                      (m)    AT&T International ACCUNET T45 Service-Overseas

                      (n)    AT&T International Satellite Shared Earth Station
                             Service

                      (o)    AT&T International Satellite Shared Earth Station
                             Direct Link Service

               3.     The Eligible Charges for the Private Line and Satellite
                      MMRC consist of the net Monthly Recurring Charges for
                      these services, after the application of any discounts or
                      credits.

        C.     ADJUSTABLE FRAME RELAY MMRC.

               1.     The initial Frame Relay MMRC is $0.00 Dollars. The Frame
                      Relay MMRC is an adjustable MMRC described above. Each
                      month of the Term is a Commitment Period.

               2.     The Frame Relay-MRC applies to the Services provided under
                      this Attachment that if provided under AT&T Tariff F.C.C.
                      No. 4 would be eligible to receive discount under the AT&T
                      Tariff F.C.C. No. 4 Frame Relay Volume Pricing Plan.

               3.     The Eligible Charges for the Frame Relay MMRC consist of
                      the net Monthly Recurring charges for these services,
                      after the application of any discounts or credits.

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Data Service Terms and Pricing                                      Page 5 of 11

        D.     ADJUSTABLE LOCAL CHANNEL MMRC.

               1.     The initial Local Channel MMRC is $0.00 Dollars. The Local
                      Channel MMRC is an adjustable MMRC as described above.
                      Each month of the Term is a Commitment Period.

               2.     The Local Channel MMRC applies to the Services provided
                      under this Agreement that if provided under AT&T Tariff
                      F.C.C. No. 11 would be eligible to receive discount under
                      the AT&T Tariff F.C.C. No. 11 Multiservice Volume Pricing
                      Plan.

               3.     The Eligible Charges for the Local Channel MMRC consist of
                      the net Monthly Recurring charges for these services,
                      after the application of any discounts or credits.

4.      RATES AND CHARGES. The Recurring and Nonrecurring Rates and Charges for
        the Services provided under this Attachment are the same as the
        undiscounted Recurring and Nonrecurring Rates and Charges under the
        applicable Tariffs, as amended from time to time, except as specified in
        this Attachment. AT&T reserves the right to increase from time to time
        the rates for Services under this Agreement, regardless of any
        provisions that would otherwise stabilize rates or limit rate increases,
        relating to charges or payment obligations imposed on AT&T stemming from
        an order, rule or regulation of the Federal Communications Commission or
        a court of competent jurisdiction, concerning universal service fund
        ("USF") charges, or as otherwise needed to recover amounts it is
        required by governmental or quasi-governmental authorities to collect
        from or pay to others in support of statutory or regulatory programs.
        AT&T will make rate adjustments under this provision as necessary.

        A.     The Monthly Recurring Charge for an AT&T ACCUNET T1.5 Service IOC
               and its associated Access Connections and Function Connections is
               as follows. The Nonrecurring Installation Charge for the IOC is
               [***].

<TABLE>
<CAPTION>
                                                       Monthly Charge
                                                       --------------
                   Mileage Band                   Fixed               Per Mile
                   ------------                   -----               --------
<S>                                             <C>                   <C>
                       0-100                    [***]                  [***]
                       101+                     [***]                  [***]
</TABLE>

        B.     The Monthly Recurring Charge for an AT&T ACCUNET T45 Service IOC
               and its associated Access Connections and Function Connections is
               as follows. The Nonrecurring Installation Charge for the IOC is
               $0.00.

<TABLE>
<CAPTION>
                                                       Monthly Charge
                                                       --------------
                   Mileage Band                   Fixed               Per Mile
                   ------------                   -----               --------
<S>                                             <C>                   <C>
                       0-100                    [***]                  [***]
                       101+                     [***]                  [***]
</TABLE>

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<PAGE>   13

Data Service Terms and Pricing                                      Page 6 of 11

        C.     The Monthly Recurring Charge for an AT&T ACCUNET SONET T155
               Service IOC and its associated Access Connections and Function
               Connections is as follows. The Nonrecurring Installation Charge
               for the IOC is [***]. A twelve-month Minimum In-Service Period
               applies for each AT&T ACCUNET SONET T155 Service IOC installed.
               If any such AT&T ACCUNET SONET T155 Service IOC is disconnected
               prior to the end of the Minimum In-Service Period, CUSTOMER will
               be billed for the remaining Minimum In-Service period times the
               Monthly Recurring Charges of SONET T155 Service plus the
               Nonrecurring Installation Charge for the IOC of [***].

<TABLE>
<CAPTION>
                                                       Monthly Charge
                                                       --------------
                   Mileage Band                   Fixed               Per Mile
                   ------------                   -----               --------
<S>                                             <C>                   <C>
                       0-100                    [***]                  [***]
                       101+                     [***]                  [***]
</TABLE>

        D.     When AT&T 1.544 Mbps Echo Cancellation is associated with an AT&T
               ACCUNET T1.5 IOC, the Monthly Charge is [***] per IOC and the
               Non-recurring Installation Charge is [***] per IOC.

5.      DISCOUNTS. The following monthly discounts are the only discounts for
        the Services provided under this Attachment. No other discounts apply.

        A.     PRIVATE LINE AND SATELLITE SERVICES. A discount will be applied
               each month, as specified following, to the Monthly Recurring
               Charges for the Services to which the Private Line and Satellite
               MMRC applies.

               1.     AT&T Private Line Services.

                      (a)    AT&T ACCUNET T1.5 Service IOCs- [***] Discount.

                      (b)    AT&T ACCUNET T45 Service IOC - [***] Discount.

                      (c)    AT&T ACCUNET SONET T155 Service IOC - [***]
                             Discount.

                      (d)    For all other domestic AT&T Private Line Services,
                             the amount of the discount is the same as the
                             discount specified in AT&T Tariff F.C.C. No. 9, for
                             a three (3) year Multi-Service Volume Pricing Plan
                             ("MSVPP") with the highest MMRC equal to or less
                             than the Private Line and Satellite MMRC that
                             applies under this Agreement for that month.

               2.     AT&T International Private Line Services. A discount will
                      be applied each month to the Monthly Recurring charges for
                      the following AT&T International Private Line Services.
                      The amount of the discount will be determined each month
                      based on the Private Line and Satellite MMRC Eligible
                      Charges for that month, as specified in the following
                      table:

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        respect to the omitted portions.

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<PAGE>   14

Data Service Terms and Pricing                                      Page 7 of 11

                        Service                                         Discount

                        AT&T International ACCUNET Spectrum of          [***]
                        Digital Services
                        -Canada and Mexico
                        -Speeds equal to and less
                        than 64Kbps

                        AT&T International ACCUNET Spectrum of          [***]
                        Digital Services
                        -Canada and Mexico
                        -Speeds equal to and greater than 128Kbps

                        AT&T International ACCUNET T1.5 Service-        [***]
                        Canada and Mexico

                        AT&T International DATAPHONE Digital            [***]
                        Service
                        -Canada and Mexico

                        AT&T International ACCUNET Digital Services     [***]

                        AT&T International ACCUNET Digital Direct       [***]
                        Link Service

                        AT&T International ACCUNET 2.048 Mbps           [***]
                        Service
                        -Mexico

                        AT&T International ACCUNET T45 Service          [***]
                        -Canada

                        AT&T International ACCUNET T45 Service          [***]
                        -Overseas

               3.     AT&T Satellite Services. A discount will be applied each
                      month to the Monthly Recurring charges for the following
                      AT&T International Satellite Services. The amount of the
                      discount will be determined each month based on the
                      Private Line and Satellite MMRC Eligible Charges for that
                      month, as specified in the following table:

                      Service                                    Discount

                      AT&T International Satellite                 [***]
                      Services
                      -Shared Earth Station, and
                      -Shared Earth Station Direct Link
                      Service

        B.     LOCAL CHANNEL SERVICES. A discount will be applied each month to
               the Monthly Recurring Charges for the Services to which the Local
               Channel MMRC applies

               1.     AT&T TERRESTRIAL T1.5 Local Channel Service - [***]
                      Discount.

               2.     AT&T TERRESTRIAL T45 Local Channel Service - [***]
                      Discount.

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        respect to the omitted portions.

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<PAGE>   15

Data Service Terms and Pricing                                      Page 8 of 11

               3.     For all other AT&T Local Channel Services, the amount of
                      the discount is the same as the discount specified in AT&T
                      Tariff F.C.C. No. 11, for a three (3) year Multi-Service
                      Volume Pricing Plan with the highest MMRC equal to or less
                      than the Local Channel MMRC that applies under this
                      Agreement for that month.

        C.     AT&T FRAME RELAY SERVICES. A discount will be applied each month
               to the Monthly Recurring Charges for the Frame Relay Services
               that, if provided under AT&T Tariff F.C.C. No. 4, as amended from
               time to time, would be eligible to receive discount under the
               Frame Relay Volume Pricing Plan.

6.      CREDITS AND WAIVERS. The following credits and waivers are the only
        credits and waivers that apply to the Services provided under this
        Attachment. No other promotions, credits or waivers apply. The maximum
        combined value of the credits that will be applied and the Nonrecurring
        Installation charges that will be waived under this Section 6 shall not
        exceed [***] during the Term of this Attachment.

        A.     CREDIT FOR INSTALLATION OF LOCAL CHANNELS SUBJECT TO AVA OR AVP.
               AT&T will apply a credit to offset the amount of Installation
               Charges incurred by CUSTOMER under Tariff F.C.C. No. 11, as
               amended from time to time, for the installation of 1.544 Mbps or
               45 Mbps Local Channels under a Tariff 11 Access Value Arrangement
               (AVA) or Access Value Plan (AVP) for use in connection with
               another Service provided under this Attachment. No credit applies
               with respect to Local Channels that are disconnected and
               reconnected after this Attachment is made part of the Agreement.

               1.     Minimum In-Service Period. A twelve-month Minimum
                      In-Service Period applies for any Local Channels with
                      respect to which such a credit is applied. If any such
                      Local Channel is disconnected prior to the end of the
                      Minimum In-Service Period, CUSTOMER will be billed an
                      amount equal to the credit previously applied with respect
                      to that Local Channel.

               B.     Non Recurring Installation Charge Waiver. AT&T will waive
                      the Nonrecurring Installation Charges associated with the
                      installation of certain Services or service components
                      provided under this Attachment. No waiver applies to
                      Services or service components that are disconnected and
                      reconnected after this Attachment is made part of the
                      Agreement.

                      1.    Minimum In-Service Period. A twelve Month Minimum
                            In-Service Period applies for any service components
                            installed subject to a waiver of Installation
                            Charges. If any such service component is
                            disconnected prior to the end of the Minimum In-
                            Service Period, CUSTOMER will be billed for the
                            Installation Charges previously waived for that
                            service component.

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        respect to the omitted portions.

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<PAGE>   16

Data Service Terms and Pricing                                      Page 9 of 11

               2.     Charges Covered by Waiver. This Installation Charge Waiver
                      applies only to the following charges that would otherwise
                      be incurred for Services provided under this Attachment:

                      (a)    AT&T MSVPP-Eligible Private Line Services -
                             Installation Charges for AT&T Private Line Services
                             provided under this Attachment that, if provided
                             under AT&T Tariff F.C.C. No. 9, as amended from
                             time to time, would be eligible to receive discount
                             under the Tariff 9 Multiservice Volume Pricing
                             Plan. This Installation Charge Waiver does not
                             apply to any Access Connection or Function
                             Connection which provides the physical connection
                             to (i) Custom Network Service obtained from AT&T
                             Tariff F.C.C. No. 1, (ii) AT&T MultiQuest Service
                             obtained from AT&T Tariff F.C.C. No. 1, or (iii)
                             Custom 800 Service obtained from AT&T Tariff F.C.C.
                             No. 2;

                      (b)    AT&T FRVPP-Eligible Frame Relay Services -
                             Installation Charges for AT&T Frame Relay Services
                             provided under this Attachment that, if provided
                             under AT&T Tariff F.C.C. No. 4, as amended from
                             time to time, would be eligible to receive discount
                             under the Tariff 4 Frame Relay Volume Pricing Plan;

                      (c)    AT&T International ACCUNET Spectrum of Digital
                             Services-Canada

                      (d)    AT&T International ACCUNET Spectrum of Digital
                             Services-Mexico

                      (e)    AT&T International ACCUNET T1.5 Service-Canada

                      (f)    AT&T International ACCUNET T1.5 Service-Mexico

                      (g)    AT&T International DATAPHONE Digital Service-Canada

                      (h)    AT&T International DATAPHONE Digital Service-Mexico

                      (i)    AT&T International ACCUNET Digital Services

                      (j)    AT&T International ACCUNET Digital Direct Link
                             Service

                      (k)    AT&T International ACCUNET 2.048 Mbps
                             Service-Mexico

                      (l)    AT&T International ACCUNET T45 Service-Canada

                      (m)    AT&T International ACCUNET T45 Service-Overseas

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Data Service Terms and Pricing                                     Page 10 of 11

                      (n)    AT&T International Satellite Shared Earth Station
                             Service

                      (o)    AT&T International Satellite Shared Earth Station
                             Direct Link Service

                      (p)    AT&T MSVPP-Eligible Local Channel Services -
                             Installation Charges for AT&T Local Channel
                             Services provided under this Attachment that, if
                             provided under AT&T Tariff F.C.C. No. 11, as
                             amended from time to time, would be eligible to
                             receive discount under the Tariff 11 Multiservice
                             Volume Pricing Plan; and

                      (q)    AT&T ACCUNET Service Office Connections, Channel
                             Options and Office

                             Functions - Installation Charges for the following
                             AT&T ACCUNET Service Office Connections, Channel
                             Options and Office Functions, when associated with
                             Inter Office Channels installed under this
                             Agreement. This Installation Charge Waiver does not
                             apply to any Access Connection or Function
                             Connection which provides the physical connection
                             to (i) Custom Network Service obtained from AT&T
                             Tariff F.C.C. No. 1, (ii) AT&T MultiQuest Service
                             obtained from AT&T Tariff F.C.C. No. 1, or (iii)
                             Custom 800 Service obtained from AT&T Tariff F.C.C.
                             No. 2.

                             (1)    AT&T ACCUNET T1.5 Service Access Connections
                                    (USOC O41AC)

                             (2)    AT&T ACCUNET T1.5 Service Function
                                    Connections (USOC NRZFC)

                             (3)    AT&T ACCUNET T1.5 Service Enhanced Diversity
                                    Routing (USOC DY7D1)

                             (4)    AT&T ACCUNET T1.5 Service Specified Routing
                                    and Avoidance (USOC DY7AS)

                             (5)    AT&T ACCUNET T45 Service Access Connections
                                    (USOC O41AC)

                             (6)    AT&T ACCUNET T45 Service Function
                                    Connections (USOC NRZFC)

                             (7)    AT&T ACCUNET T45 Service Enhanced Diversity
                                    Routing (USOC DY7D1)

                             (8)    AT&T ACCUNET T45 Service Specified Routing
                                    and Avoidance (USOC DY7AS)

Not for Publication - All Rights Reserved
<PAGE>   18

Data Service Terms and Pricing                                     Page 11 of 11

                             (9)    AT&T ACCUNET T45 Service M28 Multiplexing
                                    (USOC M2X)

                             (10)   AT&T ACCUNET SONET T155 Service Access
                                    Connections (USOC 041AC)

                             (11)   AT&T ACCUNET SONET T155 Service Function
                                    Connections (USOC NRZFC)

                             (12)   AT&T 1.544 Mbps Echo Cancellation

7.      CLASSIFICATIONS, PRACTICES AND REGULATIONS. Except as otherwise provided
        in this Attachment, the rates and regulations that apply to the Services
        provided under this Attachment are as set forth in the applicable
        Tariffs.

        A.     DETARIFFING. If, during the Term of this Attachment, any of the
               tariffs of AT&T referenced herein are canceled, in whole or in
               part, pursuant to a statutory change, order or requirement of a
               governmental or judicial authority of competent jurisdiction
               requiring detariffing, then, following such cancellation, any
               rates, terms and conditions of such tariffs that had been
               applicable to the Services provided under this Agreement will
               continue to apply, based on the language of the tariffs in effect
               as of the date of cancellation.

        B.     DEFINITIONS. Terms not otherwise defined in this Attachment or in
               the Agreement have the meanings provided in the applicable
               Tariffs.

8.      TERMINATION CHARGE. The following provision applies in lieu of any
        Discontinuance With or Without Liability provisions specified in the
        applicable Tariffs.

        A.     If CUSTOMER terminates this Attachment prior to the end of the
               Term, or if AT&T terminates this Attachment or the Service
               provided under this Attachment prior to the end of the Term due
               to CUSTOMER's breach of the Agreement, CUSTOMER will be billed a
               Termination Charge. The Termination Charge will be an amount
               equal to 50% of the unsatisfied Minimum Revenue Commitment(s)
               for the Commitment Period(s) in which the termination occurs,
               plus 50% of the Minimum Revenue Commitments for each Commitment
               Period remaining in the Term. In addition, CUSTOMER will be
               billed an amount equal to the sum of any credits provided under
               this Attachment.

                                End of Attachment

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