Document:

<PAGE>

UUNET                                                            EXHIBIT 10.28
An MCI WorldCom Company

          CO:  FASTNET                                    Issue Date:  12/14/99
        ATTN:  Phil Weller                           Expiration Date:  12/31/99
         TEL:  610-289-1100
         FAX:  610-807-0902
        SITE:  215-238

                QUOTATION FOR UUDIRECT PRICE-PROTECTED T3 SERVICE

                              ONE-TIME SERVICE FEES

<TABLE>
<S>                                                                                <C>
              Price-Protected T3 Start Up Charge                                   $[  * ]
              ESTIMATED T1 Leased Line Install Charge                              $[  * ]
                                                                                   -------
              TOTAL:  ONE-TIME SERVICE FEES                                        $[  * ]
</TABLE>

                             MONTHLY RECURRING FEES

<TABLE>
<S>                                                                              <C>
              Price Protected T3 Monthly Service Fee                            $[   *   ]
              ESTIMATED Monthly Leased Line Charge                              $[   *   ]
                                                                                ----------
              TOTAL:  MONTHLY RECURRING FEES                                    $30,716.00

              EQUIPMENT OPTIONS: PLEASE SEE YOUR REP FOR DETAILS UUNET
              recommends maintaining "cold spare" equipment for mission-critical
              applications UUNET offers a wide variety of security solutions
              utilizing Check Point and Raptor products
</TABLE>

The line charges contained in this Quote are estimates only. Terms and
conditions for UUNET services are set forth in the service agreement applicable
to each service that UUNET provides. Delivery times may vary. Purchase Orders
must include the total One-Time Service Fees, the first month's Monthly
Recurring Fees, and all equipment costs referenced above. Please note that
Purchase Orders must also indicate agreement to pay the subsequent monthly
recurring fees for the Term of the applicable service agreement.

Sincerely,                 Accepted By:           Phillip L. Weller

/s/ Rick Tartaglino

Rick Tartaglino
Phone:  703-208-4928
Fax:  703-206-5988

[*] We are seeking confidential treatment of these terms,
which have been omitted. The confidential portion has been
filed separately with the Securities and Exchange Commission.

<PAGE>

UUNET                            UUNET Technologies      +1 800 488-6383 (voice)
An MCI WorldCom Company

                                 3060 Williams Drive     +1 703-206-5800 (voice)
                                 Fairfax, VA  22031      +1 703-208-3728 (fax)
                                 http://www.uu.net       hs-sales@uu.net
                                 UUNET is a registered trademark and the UUNET
                                 logo design and The Internet At Work are
                                 trademarks of UUNET Technologies, Inc.
                                             All other trademarks acknowledged

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

                      UUDIRECT T3 PRICE-PROTECTED AGREEMENT

<TABLE>
<CAPTION>
Service 1                        Monthly Fee               Start-up Charge 2
--------                         -----------               ----------------
<S>                              <C>                       <C>
/X/      45 Mbps port               $[ * ]                      $[ * ]

</TABLE>
Prices above do not include any telco line charges, equipment costs3 or network
application fees. 4

TERM COMMITMENT 5

/ /  2-year Term (10% discount)             /X/  3-year Term ([ * ])

PAYMENT

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

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

BILLING PREFERENCE

/X/ Bill my existing UUNET account number: U04435   / /  Bill to a new account
                                           ------        number

                   PLEASE SIGN THIS AGREEMENT ON THE REVERSE.

Current customer status, U04435. Fastnet. Start Up Fee waived 100% and monthly
fee reduced with 3 year Term Commitment (Philadelphia site.)

--------------------------
1        While Customer can resell Internet connectivity, Customer cannot resell
         the service in the entirety to another person or entity without the
         express 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
         charges; 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 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 Agreement ("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.uunet/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        One (1) year minimum Term required. Discount applicable only to Monthly
         Fee. At the conclusion of the Term Commitment, this Agreement shall
         continue in effect on a month-to-month basis at UUNET's then current
         list prices for the service.

[*] We are seeking confidential treatment of these terms,
which have been omitted. The confidential portion has been
filed separately with the Securities and Exchange Commission.

<PAGE>

Will your company require extended wiring beyond the location at which circuits
     are installed at your location? Typically, if your company is located in an
     office building with multiple occupations, this will be the case.

     /X/ Yes          / / No       / / Unknown

     If Yes, there will be an additional charge from the telephone company for
     the extended wiring. This charge generally ranges from $80 to $500, and
     could result in additional delay.

Please list the equipment you plan to use for this connection:

Router:                             Purchased from UUNET?  / /  Yes    /X/  No
Modem:                              Purchased from UUNET?  / /  Yes    /X/  No

If there are any other special circuit installation or termination needs for
your site, please explains:____________________________________________________
_______________________________________________________________________________

If you are upgrading an existing UUNET account, which is the site name you have
been assigned:
     (Examples:  U01234, site-it, site.com)_____________________________________

Usage Reports available only for Leased Line services:   56K, T1, T3 and CC3
                                                         (Not available for
                                                         SMIDS, 10 Plus or Frame
                                                         Relay)

Would you like UUNET to provide you with weekly usage reports: /X/ Yes    / / No

ISDN INFORMATION FOR ISDN DIAL BACKUP

If you are using ISDN, we need some additional information to configure your
router before shipping. Because lead times on ISDN service can be significant,
we recommend that: a) you have your ISDN line scheduled for installation before
ordering your Internet 9-5 Basic service, or b) you have the UUNET-authorized
agent start the ISDN ordering process for you.

/ /  ISDN already installed   / / ISDN  line  scheduled  for  installation  on
                                  _____________________(Date)

B-channel phone number(s):______________________________________________________
SPID numbers:___________________________________________________________________

Please choose one of the following types of ISDN service:
/ /  National (N-1)

<TABLE>
<S>                                         <C>                          <C>                         <C>
------------------------------------------------------------------------------------------------------------------------------
/ /  Custom: please indicate service type:  / /v  Northern Telecom (NT)  / / AT&T point-to-point     / / AT&T multi-point
---------------------------------------------- -------------------------------------------------------------------------------
                               Line speed:  / /  56K                    / /  64K
------------------------------------------------------------------------------------------------------------------------------
</TABLE>

ADDITIONAL INFORMATION:  (OPTIONAL)

If you currently have an internet service provider other than UUNET, please
indicate the name here:_________________________________________________________

Are there any other companies which you feel would benefit from UUNET's
services? If so, UUNET will give you a one-time 5% credit on your monthly
service fee when your referral obtains service from us.

<TABLE>
<S>                                                            <C>
Contact: __________________________________________            Phone: ____________________________________
Company: __________________________________________            Fax: ______________________________________
Address: __________________________________________            E-mail:  __________________________________
         __________________________________________
         __________________________________________
</TABLE>

Customer Authorized Approval:

Name: Phillip L. Weller    Signature /s/ Phillip L. Weller    Date: 12/14/99
     ------------------              ---------------------         ---------

<PAGE>

                 CUSTOMER INFORMATION FORM - HIGH SPEED SERVICES

To process your order as quickly as possible, please complete this form and
return it to the UUNET sales department by fax at the number listed below. Thank
you for your assistance and we look forward to working with you and your
organization:

Return to fax number:________________   Attn:  _________________________________
PRIMARY TECHNICAL CONTACT FOR INSTALL:  SECONDARY TECHNICAL CONTACT FOR INSTALL:
Name:________________________________   Name:___________________________________
Phone:_______________________________   Phone:__________________________________
Fax:_________________________________   Fax:____________________________________
E-mail:______________________________   E-mail:_________________________________
Pager:_______________________________   Pager:__________________________________

PRIMARY BILLING CONTACT:                SECONDARY BILLING CONTACT:
Name:________________________________   Name:___________________________________
Phone:_______________________________   Phone:__________________________________
Fax:_________________________________   Fax:____________________________________
E-mail:______________________________   E-mail:_________________________________
Pager:_______________________________   Pager:__________________________________
PRIMARY OUTAGE CONTACT FOR SLA          SECONDARY OUTAGE CONTACT FOR SLA
REPORTING GUARANTEE:                    REPORTING GUARANTEE:
Name:________________________________   Name:___________________________________
Phone:_______________________________   Phone:__________________________________
Fax:_________________________________   Fax:____________________________________
E-mail:______________________________   E-mail:_________________________________
Pager:_______________________________   Pager:__________________________________

SHIP TO ADDRESS:                        CUSTOMER ADDRESS:
U.S. Mail                               ________________________________________
Address______________________________   ________________________________________
City/State/Zip:______________________   ________________________________________
Attn:________________________________   ________________________________________
Phone________________________________   ________________________________________

BILLING ADDRESS:                        CUSTOMER ADDRESS:
U.S. Mail                               ________________________________________
Address______________________________   ________________________________________
Floor/Ste/Rm:________________________   ________________________________________
City/State/Zip:______________________   ________________________________________
Site Phone___________________________   ________________________________________

Requested Install Dates 6:        1/6/99
                          ------------------------------------------------------
Problematic Install Dates:
                          ------------------------------------------------------
-----------------
6        Installation completed on an expedited basis (under 3 weeks) will incur
         a $495 service charge. UUNET does not guarantee installation on or by
         the Requested Install Date.

[*] We are seeking confidential treatment of these terms,
which have been omitted. The confidential portion has been
filed separately with the Securities and Exchange Commission.

<PAGE>
<TABLE>
<CAPTION>
Circle Service Type/Bandwidth:
<S>            <C>               <C>                <C>                <C>                <C>               <C>
LEASED LINE:   / /  56 Kbps      / /  T1            / / Shadow T1      / / Double T1      / /  SMDS         / / 10Plus (10Mbps)
               /X/  Tiered T3    / /  Burstable T3                     / / ATM Tiered T3  / / Shadow T3     / / OC3
FRAME RELAY:   / /  56 Kbps      / /  128 Kbps                         / / 256 Kbps       Other: (specify)_____________________
</TABLE>

Would you like ISDN Dial Backup? / / Yes /X/ No (If yes, please complete ISDN
information on Page 2.)

<PAGE>

                          GENERAL 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 Agreement 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 Agreement 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 Agreement, 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 is due 30 days after date of invoice. Accounts are in default if
     payment is not received within 30 days after date of invoice. If payment is
     returned to UUNET unpaid Customer is immediately in default and subject to
     a returned check charge of $25 from UUNET. Accounts unpaid 60 days after
     date of invoice may have service interrupted or terminated. Such
     interruption does not relieve Customer of the obligation to pay the Monthly
     Fee. Only a written request to terminate Customer's service relieves
     Customer of the obligation to pay the Monthly Fee. Accounts in default are
     subject to an interest charge on the outstanding balance of the lesser of
     1.5% per month or the maximum rate permitted by law. Customer agrees to pay
     UUNET its reasonable expenses, including attorney and collection agency
     fees, incurred in enforcing its rights under this Agreement. Prices are
     exclusive of any taxes which may be levied or assessed upon the Equipment
     or services provided hereunder. Any such taxes shall be paid by Customer.
     If Customer is exempt from otherwise applicable taxes, Customer must submit
     its tax identification number and exemption certificate at the same time it
     submits this Agreement.

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 Agreement 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 Agreement, 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 Agreement without penalty by providing UUNET written notice of
     termination

<PAGE>

     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 Agreement without the express, prior written consent
     of the other party; provided, that either party may assign or transfer this
     Agreement 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 Agreement supersedes all previous representations, understandings or
     agreements and shall prevail notwithstanding any variance with terms and
     conditions of any order submitted. Acceptance of this Agreement by UUNET
     may be subject, in UUNET's absolute discretion, to satisfactory completion
     of a credit check. Activation of service shall indicate UUNET's acceptance
     of this Agreement. Use of the UUNET Network constitutes acceptance of this
     Agreement.

AGREED AND ACCEPTED BY CUSTOMER:

                                      Philadelphia Site:

Signature:  /s/ Phillip L. Weller     Company Name:  FASTNET/Switch & Data
          -----------------------                  -----------------------------
Printed Name:  PHILLIP L. WELLER      Address:  401 N. Broad Street
             --------------------             ----------------------------------
Title:  CTO                           Bethlehem, PA 19013
      ---------------------------     ------------------------------------------
Date:  12/13/99                       Telephone              Fax
     ----------------------------              --------------   ----------------<PAGE>

                                                                  EXHIBIT 10.29
NEXTLINK
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
SERVICE ORDER AND AGREEMENT
------------------------------------------------------------------------------------------------------------------------------------
Salesperson:            Mike Margle         CC Representative:                                   Date:      12/7/99
                  --------------------------                   --------------------------              ------------
------------------------------------------------------------------------------------------------------------------------------------
Type of Service
------------------------------------------------------------------------------------------------------------------------------------
Local:       Long Distance:               Calling Card        Other:   X    Promo:         Centrex          (see attached)
       ------               ------------               ------        -----         ------          --------
------------------------------------------------------------------------------------------------------------------------------------
Address Information
------------------------------------------------------------------ -----------------------------------------------------------------
<S>                                                                 <C>
Customer Name:       Fastnet                                        Physical Address:       Same as billing
              ------------------------------------------------                       -----------------------------------------------
Billing Address:     Two Courtney Place
                ----------------------------------------------                       -----------------------------------------------
                     Suite 130
                ----------------------------------------------                       -----------------------------------------------
                     3864 Courtney Street                           City:                              ST:        Zip:
                ----------------------------------------------           -----------------------------    -------     --------------
City:         Bethlehem      ST:    PA       Zip:   18017           Install Contact:          Phil Weller
     ----------------------     -----------      -------------                      ------------------------------------------------
Customer Contact:          Phil Weller                              Date to be Contacted:      M-F   8-5
                 ---------------------------------------------                           -------------------------------------------
Title:   V.P.-Engineering             Phone:   610-266-6700         Title:   V.P. Engineering            Phone:     610-266-6700
      ------------------------------        ------------------            ------------------------------       ---------------------
Fax:     610-231-9525                 E-Mail:                       Fax:    610-231-9525                 E-Mail:
    --------------------------------         -----------------          --------------------------------        --------------------
Web site address:                                                   ISP:
                 ---------------------------------------------          ------------------------------------------------------------
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
AGREEMENT INFORMATION
------------------------------------------------------------------------------------------------------------------------------------
No. of Lines        Contract Type:  (Monthly):        Term (Specify):  3 yrs      Promo/Special Event:        Tax Payer ID:
             ------                            ------                ------------                     -------              --------
------------------------------------------------------------------------------------------------------------------------------------
MONTHLY CHARGES
------------------------------------------------------------------- ----------------------------------------------------------------
                                    Amount    Qty  Total                                        Amount           Qty        Total
                                   --------   ---  -----                                       --------          ---        -----
<S>                                 <C>       <C>  <C>   <C>                                   <C>               <C>        <C>
                                                         Local Line/DID Trunk Connection         $65.00          x
Basic Access Package                $15.95     x         DID Number Charge (first 20)            $10.00          x
Basic Access No Toll/LD             $25.00     x         DID Number Charge (each add'l. 20)      $13.50          x
Basic Access Package (Phila.)       $11.50     x         Local T-1 Charge                       $590.00          x
Hunting                                 NC     x         Local T-1, per Activated Channel        $65.00          x
DID Trunk                           $39.00     x         Presubscription Change                   $5.00          x
DID Numbers (block of 20)            $5.95     x         Remote Call Forwarding , Per Palh       $65.00          x
Local T-1 (span)                   $390.00     x         Voice Mail Installation                 $13.50          x
Local T-1 (Per activated channel)   $10.00     x         Other Tariffed NRC                           *          x
Call Forward Busy                    $1.00     x                            ------               ------
Call Forward No Answer               $1.00     x                                                $900.00
Call Forward Variable                $1.00     x                                                 ------
Call Forward, Remote Access          $6.00     x                                                (900.00) credit
Calling Number Delivery              $8.50     x
Calling Number Deliver w/Name        $9.00     x                                                 Metro Intralata Long Distance
Calling Number Delivery Blocking     $  NC     x         NEXTLINK Services (Check all that apply)
Additional Directory Listing         $2.05     x            Calling Cards:    Number of Cards    (Attach Calling Card Form)
Speed Dial - 8 Numbers               $1.00     x         ---                                 ---
Speed Dial - 30 Numbers              $2.00     x            800/8XX Service (Attach Resp. Org. form)
Call Pick-Up                         $1.00     x         ---
Call Transfer                        $1.00     x         Other Carrier:                          Metro Intralata Long Distance
Call Waiting                         $1.00     x         Carrier Name
Conference, Three Way                $1.00     x                      ---------------
Remote Call Forward                 $12.00     x         Carrier PIC Code
                                                                         ------------
                                                         Basic Single Voice Mailbox               $5.00          x
     Point to Point                 $[ * ] x [ * ]       Basic Single Voice Mailbox + Paging     $65.00          x
---------------------------------- ----------            Basic Single Voice Mailbox + Transfer
DS-3                                 $9015.20              to Attendant                          $13.50          x
-----------------------------------  --------            Basic Single Voice Mailbox +Paging
                                                           +Transfer to Attendant                $12.50          x
Requested Due Date:  11/15/99                            Enhanced Single Voice Mailbox           $15.50          x
                                                         Extension Voice Mailbox System*
                                                         (Extensions add'l. charge)               $7.50          x
                                                         Extension Boxes (Each)                   $2.50          x
                                                         9 or more mailboxes (Each)               $              x
                                                                                                   ----
                                                         ALL VOICE MAIL ORDERS REQUIRE SEPARATE FORM
                                                            Multilocation: List Main Billing Number Here       (attach form)
                                                         ---                                            -------
                                                            Tax Exempt (Attach Federal, State and/or Local Certificates)
                                                         ---
                                                            Account Codes - Outbound ONLY (Attach Detail Sheet)
                                                         ---
------------------------------------------------------------------ -----------------------------------------------------------------
</TABLE>

[*] We are seeking confidential treatment of these terms, which have been
omitted. The confidential portion has been filed separately with the Securities
and Exchange Commission.

<PAGE>

--------------------------------------------------------------------------------
CUSTOMER SIGNED AND APPROVED
--------------------------------------------------------------------------------
By signing this order form, I authorize NEXTLINK Pennsylvania, (herein referred
to as NEXTLINK) to make whatever inquiries are necessary, including checking my
credit history, to verify any statements made on this application and to
determine my eligibility for local and/or long distance service whenever
NEXTLINK deems it necessary. I authorize any person or corporation to compile
and furnish NEXTLINK such information as is necessary to allow NEXTLINK to
process this application. I agree to pay all charges incurred on my NEXTLINK
account, including any applicable state, federal or local use, excise, sales
privilege taxes, duties or similar liabilities by the stated due date and to
adhere to all of the terms and conditions stated in NEXTLINK's tariffs and the
Terms and Conditions on the back of this Service Order and Agreement. Further, I
represent that I am authorized to approve and accept the responsibility of the
terms and conditions herein.
--------------------------------------------------------------------------------
Authorized
Signature: /s/ Phillip L. Weller       Authorized Signature:
          ----------------------                            --------------------
Company Name: FASTNET                  Company Name: NEXTLINK Pennsylvania, Inc.
             -------------------                    ----------------------------
Title/Date: VP Engineering             Title/Date: Sales Mgr 12/7/99
           ---------------------                  ------------------------------
--------------------------------------------------------------------------------

<PAGE>

                              TERMS AND CONDITIONS

1.       SERVICE: During the term hereof, NEXTLINK Pennsylvania ("NEXTLINK")
shall provide Customer with the telecommunications services designated on this
Service Order and Agreement ("Agreement"). The services offered by NEXTLINK
under this Agreement are offered pursuant to applicable tariffs, which are filed
with applicable federal and state regulatory agencies, and these terms and
conditions. In the event of a conflict between this Agreement and such tariffs,
the tariffs shall control. Tariffs are available for review at NEXTLINK's
offices. This Agreement and any attachments, together with the applicable
tariffs constitute the entire agreement of the parties and supercedes all prior
discussions or agreements, whether written or oral, including but not limited to
any advertising, brochures, or solicitations. Should Customer request additional
service(s) subsequent to execution of this Agreement, Customer and NEXTLINK
agree to execute an additional agreement for such service(s). Customer agrees to
cooperate with NEXTLINK to accomplish service activation by providing NEXTLINK
access to Customer's premises and facilitating testing and any other service
delivery requirements. Service activation shall commence when NEXTLINK equipment
has been installed and telephone service is made available to Customer.

2.       PAYMENT OBLIGATION: Customer shall pay NEXTLINK for service pursuant to
the terms and conditions of the applicable tariff(s) and this Agreement. Prices
for service are exclusive of applicable taxes. No later than thirty (30)
calendar days after service activation, NEXTLINK will bill Customer monthly for
service provided hereunder and usage itemization shall accompany each invoice.
Invoices shall be due and payable upon receipt. Undisputed charges for service
that are not paid within thirty (30) days after the invoice date shall be past
due. The lower of interest of 1.5% per month, or the maximum amount permitted by
law, will be charged on past due amounts beginning the 31st day following the
invoice date. If charges are not paid within ninety (90) days of the due date,
and NEXTLINK submits the account for collections, Customer shall pay all
collection costs including, but not limited to, reasonable Attorney's fees.
Failure to pay said bill within ninety (90) days may result in discontinuance of
service.

3.       TERM & RENEWAL: This Agreement shall be effective upon complete
execution by the parties. The term is set forth on the Service Order and shall
commence on the service activation date. If no term is specified or following
the expiration of the term, this Agreement shall continue on a month-to-month
basis, upon the terms and conditions in the applicable tariff(s) and specified
herein. In the event of early termination of this Agreement by Customer, or
termination by NEXTLINK for material breach, Customer shall pay NEXTLINK all
non-recurring charges reasonably expended to establish service to the Customer;
any disconnect, early cancellation, or termination charges incurred and paid to
third parties on behalf of customer; plus all recurring charges for the balance
of the then current term.

4.       LIABILITY/INDEMNIFICATION/WARRANTY: NEXTLINK agrees to respond to
emergency interruptions of service in a timely manner. NEXTLINK agrees to
maintain and service all NEXTLINK equipment necessary to fulfill the terms of
this Agreement at no expense to the Customer.

With respect to claims or suits by Customer, its customers, or any others for
damages relating to or arising out of acts or omissions involving initiation,
installation, provisioning or restoration of any services or facilities offered
under this Agreement, NEXTLINK's liability, if any, shall be limited to the
lesser of $500 or, in the event of any failure of service, an amount equal to no
more than the proportionate charge (based on the rates then in effect) for the
service for the period of time during which the service was affected. NEXTLINK
shall in no event be liable for loss of profits, or incidental, indirect,
exemplary, punitive, special or consequential damages suffered by Customer,
Customer's customers, or any other persons or entities and relating to or
arising out of the services, the system equipment, or any other obligation of
NEXTLINK under this Agreement or otherwise, including but not limited to,
temporary service interruptions or the failure by NEXTLINK or any third party to
repair the system equipment or services, or for any act or omission of any other
entity, company or companies furnishing a portion of the service.

IN ACCORDANCE WITH THE REQUIREMENTS OF UNIFORM COMMERCIAL CODE, NEXTLINK MAKES
NO REPRESENTATION OR WARRANTY EITHER EXPRESS OR IMPLIED REGARDING THE SERVICES
OR SYSTEM EQUIPMENT, AND SPECIFICALLY DISCLAIMS ANY WARRANTY, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE, AND ASSUMES NO OBLIGATION WITH RESPECT TO THE ENFORCEMENT OF
ANY MANUFACTURER'S WARRANTIES AND GUARANTEES. NO DEFECT, UNFITNESS, OR OTHER
CONDITION OF SYSTEM EQUIPMENT OR SERVICES SHALL RELIEVE CUSTOMER OF THE
OBLIGATION TO PAY ANY CHARGES HEREUNDER OR PERFORM ANY OTHER OBLIGATIONS UNDER
THIS AGREEMENT.

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