Document:

<PAGE>

                           Advantage Program Addendum
--------------------------------------------------------------------------------

                                                                   EXHIBIT 10.26

                               SERVICES AGREEMENT

This Agreement is made as of 12/3 , 199 9 ("Effective Date"), between Covad
Communications Company, a California corporation) ("Covad") FASTNET, A
PENNSYLVANIA CORPORATION, the "Customer" listed below.

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------
                                               Customer Information
------------------------------------------------------------------------- --------------------------------------------
<S>                                                                       <C>
Customer Name: FastNet                                                    Contact: Scot Reynolds
------------------------------------------------------------------------- --------------------------------------------
Address: Two Courtney Place, Suite 130, 3864 Courtney St.                 Phone: 610-266-6700
------------------------------------------------------------------------- --------------------------------------------
City:  Bethlehem                      State: Pa.       Zip: 18015         Fax: 610-231-9525
------------------------------------------------------------------------- --------------------------------------------
Type:             -X-  ISP ______  Corporate                              E-Mail:  scotr@fast.net
------------------------------------------------------------------------- --------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
         ------------------------------------------------------ ------------------------------ ----------------
                       Exhibits                                            Terms                     Page
         ------------------------------------------------------ ------------------------------ ----------------
         <S>                                                    <C>                            <C>
         Terms and Conditions                                   Expires:                       1-2
         ------------------------------------------------------ ------------------------------ ----------------
         Volume Commitment                                      5,000 line commitment          3
         ------------------------------------------------------ ------------------------------ ----------------
         Price Schedule - TeleSpeed" Services                                                  4-6
         ------------------------------------------------------ ------------------------------ ----------------
         Service Level Agreement                                                               7-10
         ------------------------------------------------------ ------------------------------ ----------------
         Price Schedule TeleSurfer Services
         ------------------------------------------------------ ------------------------------ ----------------
         Advantage Addendum with National Circuit
         ------------------------------------------------------ ------------------------------ ----------------
         Marketing Development Funds
</TABLE>

THIS AGREEMENT INCLUDES THE ATTACHED TERMS AND CONDITIONS AND ALL OTHER EXHIBITS
REFERENCED HEREIN, AND CONTAINS, AMONG OTHER THINGS, WARRANTY DISCLAIMERS AND
LIABILITY LIMITATIONS. Any different or additional terms of any related purchase
order, confirmation, or similar form shall have no force or effect, unless
signed by both parties after the date hereof. References in this Agreement or
any exhibit to a capitalized term appearing on this cover page shall have the
meaning or value of such term on this cover page.

COVAD COMMUNICATIONS COMPANY:              CUSTOMER:  FASTNET

                                           /s/ David Van Allen         12/3/99
--------------------------------     ------------------------------------------
Name                     Date        Name                                 Date

                                                    CEO
--------------------------------     ------------------------------------------
Title                                      Title

                                       1
<PAGE>

                           ADVANTAGE PROGRAM ADDENDUM

This Advantage Program Addendum ("Addendum") is made effective as of the third
day of December, 1999 ("Addendum Effective Date") by and between Covad
Communications Company, a California corporation ("Covad"), and the "Customer"
described in the Services Agreement between Covad and Customer (the
"Agreement"). Covad and Customer now wish to amend the Agreement.

The parties agree: that this Addendum supersedes all proposals, oral or written,
all negotiations, conversations, or discussions between or among parties
relating to the subject matter of this Addendum and all past dealing or industry
custom; that this Addendum shall be integrated in and form part of the Agreement
upon execution; and that all terms and conditions of the Agreement shall remain
unchanged except as modified in this Addendum, and where the terms of the
Agreement conflict with those of this Addendum, however, the terms of this
Addendum shall control.

In consideration of the foregoing and the mutual covenants contained in this
Addendum, and other consideration, which the parties acknowledge is sufficient,
Covad and Customer agree that the Agreement is hereby amended in the manner set
forth in the attachment hereto ("Addendum Specifics").

IN WITNESS WHEREOF this Addendum has been executed by the parties hereto by
their employees duly authorized as they so declare.

COVAD COMMUNICATIONS COMPANY:              CUSTOMER:  FASTNET

                                           /s/ David Van Allen         12/3/99
--------------------------------     ------------------------------------------
Name                     Date        Name                                 Date

                                                    CEO
--------------------------------     ------------------------------------------
Title                                      Title

                                       2
<PAGE>

                     Advantage Program Addendum - Schedule A
--------------------------------------------------------------------------------

The parties hereby amend the Agreement to provide as follows:

1.       Customer agrees that Covad shall be Customer's preferred DSL provider
         such that 90% of all DSL services (or similar services) sold or resold
         by Customer to its End Users shall be purchased from Covad and not from
         any other provider, provided that if Covad is unable to provide DSL
         service to an End User within 60 days of a bona fide order being placed
         with Covad for such, Customer may provide DSL service to such End User
         through a party other than Covad. Customer will provide Covad on a
         quarterly basis, an accounting of all DSL services sold or resold by
         Customer during such prior quarter so that Covad may verify Customer's
         compliance with the 90% preferred provider commitment set forth above.

2.       Customer agrees to staff a subject matter expert on Covad and DSL that
         is dedicated to receiving information from Covad about DSL as well as
         any sales leads that Covad may send to Customer as part of any demand
         generation programs.

3.       Customer agrees to develop a strategy to implement e-commerce links
         between Customer and Covad. These links include, but are not limited
         to, API implementation, Covad-branded landing pages on Customer's web
         site from which End Users can place orders, and detailed reporting on
         End User lines sold through e-commerce links.

4.       If customer abides by all of its obligations under this Addendum and
         under the Agreement, customer will be eligible to participate in
         Covad's then-applicable Advantage Program as such Program may exist
         from time to time. Pricing and other terms for services specifically
         related to the Advantage program are attached as schedules to this
         Addendum.

                                       3
<PAGE>

                              TERMS AND CONDITIONS

                                   SCHEDULE A

National Customer Circuit Service

         Covad hereby offers to Customer a National Customer Circuit Service
         (the "National Service") option to its TeleSpeed and TeleSurfer
         Services.

         The National Service will provide National backhaul connectivity across
         Covad's National network and will include local access connectivity
         over one (1) DS-3 Customer Circuit to a single point within Covad's
         current service area. Pricing does not include TeleSpeed and TeleSurfer
         End User monthly charges.

NATIONAL CUSTOMER CIRCUIT MONTHLY RECURRING CHARGES:

Subscribed Data Rate -- Billed-in advance

<TABLE>
<CAPTION>
         ------------------ ------------
               Data          Price per
               Rate*           Month
         ------------------ ------------
         <S>                <C>
              5 Mbps           [ * ]
         ------------------ ------------
              10 Mbps          [ * ]
         ------------------ ------------
              20 Mbps          [ * ]
         ------------------ ------------
              30 Mbps          [ * ]
         ------------------ ------------
             Full DS-3         [ * ]
         ------------------ ------------
</TABLE>

*Total peak bit rate, including all ATM headers

EXCESS USAGE - if Customers actual aggregate data rate utilization over a
National Circuit exceeds the subscribed data rate on the above schedule, the
following excess usage charges shall apply, billed in arrears:

<TABLE>
<S>                                                                 <C>
 ------------------------------------------------------------------ -------------------------------------
 0-5% of usage samples (per month) above subscribed rate:           [NO CHARGE]
 ------------------------------------------------------------------ -------------------------------------

 ------------------------------------------------------------------ -------------------------------------
 5% or higher of usage samples (per month) above subscribed rate:   [ * ]
 ------------------------------------------------------------------ -------------------------------------
</TABLE>

Customer shall have the option to change the subscribed data rate for the
current month until 5:00 p.m. PST on the day prior to the last business day of
each current month. Changes in the subscribed data rate will be credited or
debited in the following billing cycle.

NATIONAL CUSTOMER CIRCUIT NON-RECURRING CHARGES:

         New Customer Circuits - [ * ]
         Conversion of Existing Local Customer Circuit to a National Circuit -
         No charge.
         Conversion of National Customer Circuit to a Local Circuit* - No
         charge.

[*] 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.

                                       4
<PAGE>

                              TERMS AND CONDITIONS

         Re-provisioning ("Migration") of end-user PVCs between two different
         Local and National Circuits - [*] per end user PVC until such time as
         Covad introduces an automated tool on support.covad.com. Covad expects
         to introduce such tool on or before February 28, 2000. Migration of
         end-user PVCs between any two individual Local and National Circuits
         with the automated tool will incur a charge of [*] per use, for an
         unlimited number of PVC migrations.

         All non-local TeleSurfer end user PVCs must be migrated off of the
         National Circuit before it can be converted to a Local Circuit.

TERMS OF USE

Customer will pay the applicable Monthly and Non-Recurring Charges specified
above pursuant to the terms of the Agreement. Remote region End User traffic can
be combined with and carried with local region traffic on the National Service
Customer Circuit, however all traffic will be included in the data rate
subscribed to as indicated in the above table.

National Service is to be used expressly for the provisioning of TeleSpeed and
TeleSurfer Service to individual End Users. Customer represents that the actual
aggregate data rate utilization by End Users shall not exceed the maximum data
rate subscribed to above (95% or more of Customer Circuit data rate usage
samples, sampled at 5-minute intervals, shall be less than subscribed data rate
in any calendar month). If the actual Customer Circuit data rate used by
Customer (for more than 5% of samples over specified intervals) for National
Service exceeds the subscribed data rate, then Customer shall pay the
appropriate monthly excess usage charges outlined above.

Covad expects to introduce SLAs for TeleSpeed Service provisioned on a National
Circuit prior to December 31, 1999, which will replace the standard TeleSpeed
SLA Agreement outlined elsewhere in the Agreement. Customer shall not receive
the benefit of the SLA for National Service prior to its introduction.

[*] 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.

                                       5
<PAGE>

                              TERMS AND CONDITIONS

1. DEFINITIONS. As used herein: "Services" are services using digital subscriber
line ("DSL") technology to provide high-speed telecommunications data services
identified in the attached Price Schedule(s) which may include business-grade
TeleSpeed and TeleSpeed Remote Services and consumer-grade Telesurfer Services)
to Customer's Internet and network access customers ("End User"), that Covad
makes available at its discretion, and as more fully described on the Covad Web
Site: "End User Circuit" is a digital data telecommunications service that
consists of one permanent virtual circuit to an End User's premise utilizing DSL
technology. An End User Circuit provides upstream and downstream maximum
throughout rates that range from 144Kbp,-up to 1.5 Mbps (depending on what
Customer orders for that End User). Provision of an End User Circuit does not
include any Internet access service: "Customer Circuit" is a backhaul circuit
between Covad's regional data center or hub and Customers point-of-presence in a
particular region, this is generally required before Covad can provide Services
in that region. Customer may order a Customer Circuit from the Web Site. "Web
Site" means Covad's customer ordering web site located at:
http://support.covad.com.

2. PROVISION OF SERVICES. Subject to payment of all applicable fees, Covad will
use reasonable commercial efforts to supply the Services that Customer may order
from time to time through the Web Site. All Services will be supplied in
accordance with the Agreement, these Terms and Conditions, and the current
standard Customer Policies. Customer shall purchase Services for each End User
for an initial term of one (1) year ("End User Term"), and shall maintain each
Customer Circuit for a minimum one (1) year term ("Customer Term"), after which
Covad shall continue to provide Services to such Customer on a monthly basis,
subject to continuing payment of applicable fees and Customer's compliance of
terms and conditions requested by Covad. Covad reserves the sole and exclusive
right to determine the expansion of its service area, and the fight to maintain,
reconfigure, or discontinue any Service. Customer understands that Covad's
performance is dependent in part on third party actions, including, without
limitation, Customer and its End Users. Accordingly, any performance to be
rendered by Covad hereunder shall be appropriately waived or delayed to account
for such actions or inactions. Customer shall provide Covad with all information
reasonably requested (including, without limitation, information about each End
User) in connection with each order placed.

3. CUSTOMER CIRCUITS. Customer must order, and Covad must provide, a Customer
Circuit before Covad can supply any End User Circuits or Services through such
Customer Circuit. All one-time fees ("One-time Fees") will be due, and all
monthly fees will start, for each Customer Circuit upon Covad's notification to
Customer that the Customer Circuit is complete.

4. END USER CIRCUITS. Customer must order and Covad must successfully provide,
an End User Circuit for each End User before Covad can supply any Services for
that End User. Covad and Customer agree that an End User Circuit shall be
successfully provided if the maximum throughput of such End User Circuit is 80%
of the ordered Service. If Covad is unable to

                                       6
<PAGE>
                             TERMS AND CONDITIONS

successfully provide an End User Circuit for the ordered service, Covad will
offer the End User the maximum available throughput rate and available Service.
Covad will notify Customer if End User declined the Circuit, or at what
throughput rate the End User accepted the Circuit. All One-time Fees will be
due, and all monthly fees will start, for each End User Circuit upon Covad's
notification to Customer of successfully providing of such End User Circuit.

5. EQUIPMENT. Customer may choose to have Covad supply and configure the
necessary equipment for an End User Circuit and Services at the End User
premises. Customer is responsible for changes to any End User premise equipment,
software and configuration after Covad completes its service setup. Covad will
bill any equipment charges to Customer as part of the One-time Fees for the End
User Circuit. Covad shall have no obligation or liability in connection, with
any equipment not purchased through Covad and configured by Covad, or for any
abuse or misuse of any equipment by any party other than Covad. Covad shall pass
through to Customer any warranties from the manufacturers of equipment that
Covad installs at Customer's or an End User's premises. Covad shall have no
obligation to repair or maintain any equipment, and Customer shall be
responsible for seeking warranty and other service directly from the
manufacturer. However, Covad shall provide replacement End User premise
equipment as described in the Service Level Agreement ("SLA"). If Customer
purchases End User premise equipment directly from Covad, it can be returned to
Covad only if the equipment is in original working condition and in its original
packing within thirty (30) days from Covad's original shipment date. A 25%
equipment handling and restocking charge will be charged to the Customer by
Covad. Customer should call Covad Customer Care to receive a Return Materials
Authorization (RMA) number and to ship the equipment back to Covad. (the
Customer shall pay all shipping charges associated with this return).

6. FEES AND PAYMENT TERMS. Customer shall pay Covad the One-time monthly fees
and other fees shown in the applicable Pricing Schedule(s) for the setup,
operation and providing of Services, Customer Circuits, and End User Circuits.
The fees billed to Customer for Services shall not change during the Initial
Term (as defined below); thereafter. Covad shall be free to change any of the
fees upon notice to Customer. Covad shall invoice Customer once a month, Covad's
invoices shall bill Customer for Services one month in advance. For new End
Users, setup during a month, Covad's invoice will reflect all One-time Fees,
prorated monthly fees for such month and the advance monthly fees. Customer
shall pay all invoiced fees no later than thirty days from invoice date. Late
payments will accrue interest at a rate of one and one-half percent (1 1/2%) per
month, or the highest rate allowed by applicable law, whichever s lower, and
Customer shall pay all collection costs incurred by Covad (including, without
limitation, reasonable attorney's fees). In certain situations, Covad may
require Customer to deposit funds with Covad to secure payment of fees owed by
Customer hereunder. Such deposited funds shall not bear interest If Customer has
a bone Fide dispute with any of the amounts on an invoice ("Disputed Amounts"),
Customer must pay all amounts not in dispute as set forth above. and provide
Covad with a written request for billing adjustment together with all supporting
documentation within sixty (60) days from the date of the invoice or customers'
fight to billing adjustment shall be waived. In the event of a billing dispute
the parties shall promptly resolve the dispute by mutual agreement or by
arbitration. Unless otherwise specified by Covad air payments shall be made to
Covad Communications Company and mailed to Accounts

                                       7
<PAGE>
                             TERMS AND CONDITIONS

Receivable Dept., Covad Communications Company, 2330 Central Expressway, Santa
Clara, CA 95050. Customer shall be responsible for all applicable Federal,
state, and local mandated surcharges, fees, user's fees, universal service
contributions and taxes applicable under this Agreement.

7. CANCELLATION AND DISCONNECTION. Customer shall give thirty (30) days written
notice to Covad to disconnect a Customer Circuit. All End User Circuits served
by a Customer Circuit must be disconnected at the same time or before
disconnecting such Customer Circuit. If Customer disconnects a Customer Circuit
during the Customer Term for that Customer Circuit, Customer shall incur fees
for the balance of the Customer Term. If Customer disconnects Services for an
End User during the End User Term, Customer shall incur the lesser of the fees
for the balance of the End User Term or the Disconnect Fee set forth in the
Pricing Schedule. In any case, Customer will be obligated to pay Service Setup
fees and will not be entitled to a refund of any fees at any time. If Customer
cancels an End User Circuit prior to setup of such End User Circuit, Customer
shall incur the End User Cancellation Fee as set forth in the Price Schedule.

8. SUPPORT AND MAINTENANCE. Customer shall provide all first-level support for
all End Users. Covad shall use reasonable commercial efforts to provide
second-level support for the Customer Circuits, End User Circuits and Services.
Customer understands that Covad may, from time to time, need to interrupt
services . for maintenance and other operational reasons, and that Customer
shall not receive any compensation for such interruptions. Covad will give
Customer reasonable advance notice of all such interruptions.

9. LIMITED PERFORMANCE WARRANTY. Covad warrants to Customer, and only Customer,
that the Services shall perform in substantial accordance with the performance
criteria set forth in the SLA. This warranty shall be void if: (i) any equipment
has been subjected to physical or electrical stress, misuse, neglect, accident
or abuse, or damaged by any other external causes; (ii) the Service or any
equipment has been repaired or altered by anyone other than Covad or Covad's
subcontractors or affiliates, without Covad's express and prior written
approval; (iii) the Service or any equipment has been provided by someone other
than Covad or Covad's subcontractors or affiliates; or (iv) the Service or any
equipment is used in violation of applicable law or in violation of instructions
furnished by Covad. During the term of this Agreement. Covad shall supply
Customer with the reports specified in the SLA showing performance of the
Services. Covad's sole obligation if the Services fail to meet the SLA shall be
to use reasonable commercial efforts to correct such failure, provided that
Customer promptly reports such failure and the failure can be reproduced by
Covad, and the cause of the failure is within Covad's control. Such a failure to
meet the SLA shall not be a material breach of this Agreement. If a performance
failure occurs that is within Covad's control, and Covad is unable to correct
such failure within the time periods set forth in the SLA, then. as Customer's
sole remedy, Covad will credit Customer's account with the amounts set forth in
the SLA for that type of failure, but only up to the amount paid by Customer for
such Services in the month in which such failure occurred. Covad shall have no
liability in connection with the future of the Services to meet any transmission
speed. throughput rates or other performance criteria.

                                       8
<PAGE>
                             TERMS AND CONDITIONS

10. YEAR 2000 WARRANTY. Covad warrants to its Customer, and only Customer, that
the Services, provided are used correctly and are supplied with dates in proper
format, will be capable of processing dates before and after the year 2000.
Customer acknowledges that the Services are dependent on third party equipment,
software, and systems, including, without limitation, those of local telephone
companies and other carriers. Covad makes no representations and will not be
liable with respect to Year 2000 compliance of such equipment, software, systems
and third parties. Covad's sole obligation for a failure or the Services to
comply with the foregoing warranty is to use its best efforts to correct such a
failure.

11. WARRANTY DISCLAIMER  EXCEPT FOR THE WARRANTIES SET OUT IN SECTIONS 9 AND
10, THE SERVICES, CUSTOMER CIRCUITS, AND END-USER CIRCUITS, AND ALL OTHER
PRODUCTS AND SERVICES THEREUNDER ARE PROVIDED ON AN "AS IS" BASIS, AND
CUSTOMER'S AND END USER'S USE THEREOF IS AT ITS OWN RISK. COVAD DOES NOT
MAKE, AND HEREBY DISCLAIMS, ANY AND ALL OTHER EXPRESS AND IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, NONINFRINGEMENT AND TITLE, AND ANY WARRANTIES ARISING
FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. COVAD DOES NOT WARRANT
THAT THE SERVICES, CUSTOMER CIRCUITS, AND END-USER CIRCUITS WILL PERFORM AT
A PARTICULAR SPEED, OR WILL BE UNINTERRUPTED, ERROR-FREE, OR COMPLETELY
SECURE.

12. CUSTOMER REPRESENTATIONS AND WARRANTIES. Customer represents and warrants
that: (i) Covad has informed Customer that the Services constitute
telecommunications or telecommunications services ("Telecommunication Services")
as defined by federal law, and as a result, Covad will assume the obligations of
providing such Telecommunications Services, including, billing, collecting and
remitting to governmental authorities the applicable taxes such as the universal
service tax (collectively, "Telecommunication Obligations"). In the event,
Customer chooses to use the Services to provide Telecommunication Services,
Customer will provide Covad thirty (30) days prior written notice so that Covad
may discontinue such Telecommunication Obligations and Customer will assume such
Telecommunication Obligations thereafter); (ii) it shall not, in the ordinary
course of its business, when using Services, be able to identify, and
distinguish between, packet data transmissions that originate and terminate
within the same state (intrastate transmissions), and those packet data
transmissions that originate and terminate in different states (interstate
transmissions), and states that it is impractical to identify, distinguish and
measure its intrastate and interstate transmissions on Covad's network; (iii)
Customer estimates in good faith that more than ten percent (10%) of all data
packets transmitted through Services will consist of interstate transmissions;
and. (iv) it will inform all End Users that Services do not include 911 or other
emergency and ancillary services conventionally available from incumbent local
phone companies.

13. TERM AND TERMINATION. This Agreement shall remain in effect until terminated
as set forth in this Section. The initial term of this Agreement shall be one
(1) year (the "Initial Term"). After the Initial Term, either party may
terminate this Agreement with thirty (30) days written notice to the other
party. After ten (10) business days of non payment from any due date,

                                       9
<PAGE>
                             TERMS AND CONDITIONS

Covad may suspend Services. After thirty (30) days of nonpayment from any due
date, Covad may terminate the Services, and/or this Agreement. Customer shall
remain responsible for all fees accrued prior to the date of termination. In
addition, either party may terminate this Agreement if the other party
materially breaches any term or condition of this Agreement and fails to cure
such breach within thirty (30) days after receipt of written notice of the same.

14. EFFECT OF TERMINATION. Upon expiration or termination of this Agreement,
Covad will continue to maintain all existing Customer Circuits and End User
Circuits, and provide Services pursuant to the terms hereof, provided that
Customer continues to pay all applicable fees therefor and complies with any
additional terms and conditions requested by Covad. Any accrued rights to
payment. any remedies, and Sections 6,7, 9, 11, 12, 14, 15. 16, and 17 will
survive any expiration or termination of this Agreement.

15. LIMITATIONS OF LIABILITY. IN NO EVENT WILL COVAD BE LIABLE TO CUSTOMER,
ANY END-USER, OR ANY THIRD PARTY FOR ANY CLAIMS ARISING OUT OF OR RELATED TO
CUSTOMER'S BUSINESS, ITS RELATIONSHIP WITH ITS END-USERS, OR OTHERWISE. COVAD
SHALL NOT BE LIABLE FOR ANY DAMAGES ASSOCIATED WITH THE INTERRUPTION OR LOSS
OF USE OF SERVICES. EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES,
COVAD'S MAXIMUM AGGREGATE LIABILITY TO CUSTOMER RELATED TO CLAIM ARISING
UNDER THIS AGREEMENT, UNDER ANY CONTRACT. NEGLIGENCE, STRICT LIABILITY OR
OTHER THEORY WILL BE LIMITED TO THE TOTAL AMOUNT PAID BY CUSTOMER TO COVAD
FOR THE SERVICES GIVING RISE TO SUCH CLAIM IN THE SIX (6) MONTHS PRIOR TO THE
OCCURRENCE OF SUCH CLAIM. NEITHER PARTY WILL BE LIABLE UNDER ANY CONTRACT,
NEGLIGENCE, STRICT LIABILITY OR OTHER THEORY FOR ANY LOST REVENUE, LOST
PROFITS, INCIDENTAL, PUNITIVE, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT
TO ANY SUBJECT MATTER OF THIS AGREEMENT.

16. INDEMNITY. Covad hereby indemnities and holds harmless Customer and its End
Users from any personal injury or tangible property damage caused by Covad or
its agents during the course of providing or maintaining the End User Circuits
or any End User premise equipment End User provided, however, that such
indemnity shall not be available if the cause of such damage is due to
Customer's or End Users willful or negligent acts or omissions.

17. FORCE MAJEURE. Neither Party hereto shall be responsible for any failure to
perform its obligations under this Agreement (other than obligations to pay
money) if such failure is caused by acts of God, war, strikes, revolutions,
earthquake, lack or failure of transportation facilities, laws or governmental
regulations or other causes that are beyond the reasonable control of such
party.

18. MISCELLANEOUS. This Agreement is not assignable or transferable by either
party without the prior written consent of the other party, except for an
assignment to an acquirer of all or substantially all of the assets or business
of such party. Covad may subcontract the performance of Services to third
parties. The parties agree that they are independent contractors and that this

                                       10
<PAGE>
                             TERMS AND CONDITIONS

Agreement and relations between Covad and Customer hereby established do not
constitute a, joint venture, agency or contract of employment between them, or
any other similar relationship. Neither party has the right or authority to
assume or create any obligation or responsibility on behalf of the other. Each
party shall keep all information designated as confidential that is received
from the other party in confidence, and shall not disclose such information to a
third party, unless and until such information becomes publicly available
through no fault of the party receiving it. Any notice, report, approval or
consent required or permitted hereunder shall be in writing, and effective on
the date of delivered (if sent by hand, first class US mail, or courier), or on
the date sent (if sent by facsimile). No failure or delay in exercising any
right hereunder will operate as a waiver thereof, nor will any partial exercise
of any right or power hereunder preclude further exercise. If any provision of
this Agreement shall be adjudged by any court of competent jurisdiction to be
unenforceable or invalid, that provision shall be limited or eliminated to the
minimum extent necessary so that this Agreement shall otherwise remain in full
force and effect and enforceable. This Agreement shall be deemed to have been
made in, and shall be construed pursuant to the laws of the State of California
and the United States without regard to conflicts of laws provisions thereof.
Any waivers or amendments shall be effective only if made in writing. This
Agreement is the complete and exclusive statement of the mutual understanding of
the parties and superseded and cancels all previous written and oral agreements
and communications relating to any of the subject matter of this Agreement.
Binding arbitration shall be the sole and exclusive remedy for resolution of
disputes between the parties. Such dispute shall be submitted for arbitration in
San Francisco. California under the rules of the American Arbitration
Association. The arbitrator's decision will be final and entered into any court
of competent jurisdiction. The prevailing party will be entitled to recover its
attorney's fees and costs in connection with such arbitration.

                                       11
<PAGE>

            Price Schedule - TeleSpeed-Registered Trademark- Services
-------------------------------------------------------------------------------

VOLUME COMMITMENT PRICING

If Customer has committed to a specified Volume Level ("Volume Commitment
Level") as set forth on the cover page of the Agreement, then Customer will
receive the applicable pricing as of the Effective Date of the Agreement
("Volume Commitment Pricing"). For example, if Customer commits to a 2,000
Volume Level, all End User TeleSpeed Circuits will be billed at the Volume Level
Price for 1,000 -2,499 circuits, for the respective Regional Classification,

In order to maintain such Volume Commitment Pricing, Customer agrees to meet the
following Volume Milestones:

VOLUME MILESTONE SCHEDULE

<TABLE>
<CAPTION>
-------------------------------------------------- -------------------------------------------------------------------
                                                                               MILESTONES
-------------------------------------------------- ---------------- ----------------- -------------- -----------------
Timeframe (after the Effective Date)                  3 months          6 months        9 months        12 months
-------------------------------------------------- ---------------- ----------------- -------------- -----------------
<S>                                                <C>              <C>               <C>            <C>
Percentage of Volume Commitment Achieved Based           15%              35%              65%             100%
on Invoiced End User Circuits
-------------------------------------------------- ---------------- ----------------- -------------- -----------------
</TABLE>

In the event that the Customer fails to meet each of the above Volume
Milestones, pricing will revert to the standard Volume Level Pricing FOR ALL END
USER CIRCUITS, BOTH EXISTING AND NEW CIRCUITS. In this event, Customer would be
required to pay the End User TeleSpeed Monthly Charges corresponding to
Customers actual order volume as of the respective Volume Milestone (i.e., 3
months, 6 months, etc.).

For example, if Customer has a Volume Commitment of 5,000 circuits, within 6
months of to applicable Effective Date, Customer must have at least 1,750 End
User TeleSpeed Circuits invoiced. Assuming that at the six month Volume
Milestone, Customer has only 1,250 End User TeleSpeed Circuits invoiced, then
the Customer is obligated to pay the monthly charges associated with the
$1,000 - 2.499 Volume Level (e.g., TeleSpeed Regional Classification A:
TeleSpeed 144-$[*] Speed 384-$[*]; etc.) for the subsequent month(s)
FOR ALL END USER CIRCUITS. The Customer would pay the End User TeleSpeed
Monthly Charges associated with its actual order volume FOR ALL END USER
CIRCUITS BOTH EXISTING AND NEW CIRCUITS until Customer satisfies its
subsequent Volume Milestone. If at the nine month Volume Milestone, Customer
has met or exceeded its Volume Milestone (e.g. 3,250 End User Telespeed
Circuits invoiced), then Customer will receive Volume Commitment Pricing for
future End User Telespeed Circuits. As part of Customer's Volume Commitment,
Service Setup charges for services are billed at the level of Customer's
commitment, as long as Customer is within the milestones established above.

[*] 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.

                                       12
<PAGE>

          Price Schedule - TeleSpeed-Registered Trademark- Services
          ---------------------------------------------------------

ONE-TIME SERVICE SETUP CHARGES

One-time Service Setup charges are listed in the Price Schedule for TeleSpeed
and TeleSurfer services. For example, if Customer has a volume commitment of
1,000 lines or greater, Customer will be billed for Service Setup charges of
$[*] for all circuits, starting with the first circuit, as long as Customer
meets the Milestones listed above.

DESCRIPTION OF TELESPEED SERVICES

<TABLE>
<CAPTION>
---------------------------------------- -------------------------------------- -------------------------------------
             SERVICE NAME                         MAXIMUM THROUGHPUT                     MAXIMUM THROUGHPUT
---------------------------------------- -------------------------------------- -------------------------------------
<S>                                      <C>                                    <C>
             TeleSpeed 144                          Up to 144 Kbps                         Up to 144 Kbps
---------------------------------------- -------------------------------------- -------------------------------------
             TeleSpeed 192                          Up to 192 Kbps                         Up to 192 Kbps
---------------------------------------- -------------------------------------- -------------------------------------
             TeleSpeed 384                          Up to 384 Kbps                         Up to 384 Kbps
---------------------------------------- -------------------------------------- -------------------------------------
             TeleSpeed 768                          Up to 768 Kbps                         Up to 768 Kbps
---------------------------------------- -------------------------------------- -------------------------------------
             TeleSpeed 1.1                          Up to 1.1 Mbps                         Up to 1.1 Mbps
---------------------------------------- -------------------------------------- -------------------------------------
             TeleSpeed 1.5                          Up to 384 Kbps                         Up to 384 Kbps
---------------------------------------- -------------------------------------- -------------------------------------
</TABLE>

TELESPEED SERVICES VOLUME LEVEL PRICING

The following are the monthly charges for End User TeleSpeed Circuits based on
actual order volume ("Volume Level Pricing"). The applicable Volume Level Price
shall be determined based on the location of the End User Circuit in a Regional
Classification.

The applicable Volume Level Pricing for each month will be determined based
on the number of End User Circuits invoiced (i.e., in service), in aggregate,
at the end of the prior month. Such Volume Level Pricing will apply only to
incremental End User Circuits. To clarify, the first 999 End User TeleSpeed
Circuits will be billed at the Volume Level Price associated with the 0-999
row, and the next 1,499 End User TeleSpeed Circuits will be billed at the
Volume Level Price associated with the 1,000-2,499 row, etc.

All End User Circuits are counted in determining the applicable Volume Level
Price regardless of the Regional Classification.

END USER TELESPEED MONTHLY CHARGES
REGIONAL CLASSIFICATION A METRO AREAS:

<TABLE>
<S>                                      <C>                                    <C>
---------------------------------------- -------------------------------------- --------------------------------------
Austin.  Texas (AUS)                     Dallas,    Texas    (DAL)              Houston.  Texas (HOU)
---------------------------------------- -------------------------------------- --------------------------------------
Los Angeles, California (LAX)            Sacramento, California (SAC)           San Diego, California (SAN)
---------------------------------------- -------------------------------------- --------------------------------------
San Francisco,  California  (SFO)
---------------------------------------- -------------------------------------- --------------------------------------
</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.

                                       13
<PAGE>

          Price Schedule - TeleSpeed-Registered Trademark- Services
          ---------------------------------------------------------

TELESPEED REGIONAL CLASSIFICATION A

<TABLE>
<CAPTION>
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
    VOLUME LEVEL        TELESPEED        TELESPEED       TELESPEED       TELESPEED       TELESPEED       TELESPEED
      INVOICED             144              192             384             768             1.1             1.5
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
<S>                   <C>             <C>              <C>             <C>             <C>             <C>
0 - 999               $[ * ]          $[ * ]           $[ * ]          $[ * ]            $[ * ]        $[ * ]
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
1,000  -   2,499      $[ * ]          $[ * ]           $[ * ]          $[ * ]            $[ * ]        $[ * ]
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
2.500  -   4,999      $[ * ]          $[ * ]           $[ * ]          $[ * ]            $[ * ]        $[ * ]
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
5,000  -   9,999      $[ * ]          $[ * ]           $[ * ]          $[ * ]            $[ * ]        $[ * ]
--------------------- --------------- ---------------- --------------- --------------- --------------- ---------------
</TABLE>

REGIONAL CLASSIFICATION B METRO AREAS:

<TABLE>
<S>                                      <C>                                    <C>
---------------------------------------- -------------------------------------- --------------------------------------
Atlanta. Georgia (ATL)                   Baltimore. Maryland (BAL)              Boston, Massachusetts (BOS)
---------------------------------------- -------------------------------------- --------------------------------------
Chicago, Illinois (CHI)                  Detroit, Michigan (DET)                Miami, Florida (MIA)
---------------------------------------- -------------------------------------- --------------------------------------
New York, New York (NYC)                 Philadelphia, Pennsylvania (PHL)       Raleigh, North Carolina (RAL)
---------------------------------------- -------------------------------------- --------------------------------------
Washington, D.C. (WAS)
---------------------------------------- -------------------------------------- --------------------------------------
</TABLE>

TELESPEED REGIONAL CLASSIFICATION B

<TABLE>
<CAPTION>
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
 VOLUME LEVEL INVOICED      TELESPEED      TELESPEED      TELESPEED       TELESPEED      TELESPEED       TELESPEED
                               144            192            384             768            1.1             1.5
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
<S>                       <C>            <C>            <C>             <C>            <C>             <C>
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
0 - 999                   $[ * ]         $[ * ]         $[ * ]          $[ * ]         $[ * ]          $[ * ]
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
1,000 - 2,499             $[ * ]         $[ * ]         $[ * ]          $[ * ]         $[ * ]          $[ * ]
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
2,500 - 4,999             $[ * ]         $[ * ]         $[ * ]          $[ * ]         $[ * ]          $[ * ]
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
5,000 - 9,999             $[ * ]         $[ * ]         $[ * ]          $[ * ]         $[ * ]          $[ * ]
------------------------- -------------- -------------- --------------- -------------- --------------- --------------
</TABLE>

REGIONAL CLASSIFICATION C METRO AREAS:

<TABLE>
<S>                                      <C>                                   <C>
---------------------------------------- ------------------------------------- --------------------------------------
Denver, Colorado (DEN)                   Minneapolis, Minnesota (MSP)          Portland, Oregon    (PDX
---------------------------------------- ------------------------------------- --------------------------------------
Phoenix, Arizona (PHX                    Seattle Washington (SEA)
---------------------------------------- ------------------------------------- --------------------------------------
</TABLE>

TELESPEED REGIONAL CLASSIFICATION C

<TABLE>
<CAPTION>
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
 VOLUME LEVEL INVOICED      TELESPEED      TELESPEED      TELESPEED      TELESPEED       TELESPEED       TELESPEED
                               144            192            384            768             1.1             1.5
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
<S>                       <C>            <C>            <C>             <C>           <C>              <C>
0 - 999                   $[ * ]         $[ * ]         $[ * ]          $[ * ]        $[ * ]           $[ * ]
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
1,000 - 2,499             $[ * ]         $[ * ]         $[ * ]          $[ * ]        $[ * ]           $[ * ]
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
2,500 - 4,999             $[ * ]         $[ * ]         $[ * ]          $[ * ]        $[ * ]           $[ * ]
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
5,000 - 9,999             $[ * ]         $[ * ]         $[ * ]          $[ * ]        $[ * ]           $[ * ]
------------------------- -------------- -------------- --------------- ------------- ---------------- --------------
</TABLE>

END USER TELESPEED CIRCUIT ORDER AND OTHER ONE-TIME CHARGES

<TABLE>
<CAPTION>
---------------------------------------------------------- ---------------------------------- -----------------------
END USER PROMISE EQUIPMENT                                 APPLICABLE TELESPEED SERVICE       ONE-TIME CHARGE
---------------------------------------------------------- ---------------------------------- -----------------------
<S>                                                        <C>                                <C>
FlowPoint 144 IDSL Router                                  TS144                              $[ * ]
---------------------------------------------------------- ---------------------------------- -----------------------
FlowPoint  2200  SDSL  Router                              TS192, TS384, TS768, TSI.1         $[ * ]
---------------------------------------------------------- ---------------------------------- -----------------------
FlowPoint 2 1 00 ADSL  Router                              TSI.5                              $[ * ]
---------------------------------------------------------- ---------------------------------- -----------------------
Efficient Networks Speedstream 5250 SDSL Modem             TS192, TS384, TS768, TSI.1         $[249.00]
---------------------------------------------------------- ---------------------------------- -----------------------
</TABLE>

                                       14
<PAGE>

          Price Schedule - TeleSpeed-Registered Trademark- Services
          ---------------------------------------------------------

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------- -----------------------
                              TELESPEED SERVICE ORDER CHARGES                                 ONE-TIME CHARGE
--------------------------------------------------------------------------------------------- -----------------------
<S>                                                                                           <C>
Service Setup including provisioning of PVC (G-999  circuits  invoiced)                       $[ * ]
--------------------------------------------------------------------------------------------- -----------------------
Service Setup including provisioning of PVC (1000 + circuits  invoiced)                       $[ * ]
--------------------------------------------------------------------------------------------- -----------------------
Inside wiring from RJ45 Wall Jack to NID (optional)                                           $[ * ]*
--------------------------------------------------------------------------------------------- -----------------------
Field Technician Dispatch (during normal business hours)                                      $[ * ]*
--------------------------------------------------------------------------------------------- -----------------------
*  First hour minimum Charge.  For each additional 15 minutes                                 .
--------------------------------------------------------------------------------------------- -----------------------
Field Technician Dispatch (other hours: after hours, weekends, holidays)                      $[ * ]**
--------------------------------------------------------------------------------------------- -----------------------
** First hour/Minimum Charge.  For each additional 15 minutes:  $[25.]                        $[ * ]
--------------------------------------------------------------------------------------------- -----------------------

<CAPTION>
--------------------------------------------------------------------------------------------- ----------------------
                                   OTHER SERVICE CHARGES                                      ONE-TIME CHARGE
--------------------------------------------------------------------------------------------- ----------------------
<S>                                                                                           <C>
Upgrade/downgrade of End User TeleSpeed  Service  (involves a dispatch of  FT)                $[ * ]
--------------------------------------------------------------------------------------------- ----------------------
Upgrade/downgrade of End User TeleSpeed Service (no dispatch of FT)                           $[ * ]
--------------------------------------------------------------------------------------------- ----------------------
End User TeleSpeed Circuit Disconnect Fee (per circuit)                                       $[ * ]
--------------------------------------------------------------------------------------------- ----------------------
End User TeleSpeed Circuit Cancellation Fee (per circuit)                                     $[ * ]
--------------------------------------------------------------------------------------------- ----------------------
Missed Appointment (i.e., End User no-show) Charge                                            $[ * ]
--------------------------------------------------------------------------------------------- ----------------------
</TABLE>

CUSTOMER CIRCUIT CHARGES

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------------------- -----------------------
                       DESCRIPTION OF CUSTOMER CIRCUIT ORDER CHARGES                          ONE-TIME CHARGE
--------------------------------------------------------------------------------------------- -----------------------
<S>                                                                                           <C>
DS3 /ATM                                                                                      $[ * ]
--------------------------------------------------------------------------------------------- -----------------------
<CAPTION>
                      DESCRIPTION OF CUSTOMER CIRCUIT MONTHLY CHARGES                         MONTHLY CHARGE
--------------------------------------------------------------------------------------------- -----------------------
<S>                                                                                           <C>
IDS3 / ATM                                                                                    $[ * ]
--------------------------------------------------------------------------------------------- -----------------------
</TABLE>

DESCRIPTION OF TELESPEED REMOTE SERVICES

TeleSpeed Remote-TM- Service is an additional service to Covad's standard
TeleSpeed Service offerings. TeleSpeed Remote provides long-distance
connectivity for TeleSpeed End Users located in distant metropolitan areas.

TELESPEED REMOTE SERVICE - MONTHLY RECURRING SERVICE CHARGE (PER END USER)

<TABLE>
<CAPTION>
--------------------------------- ------------- -------------- ------------- ------------- ------------- ---------------
DISTANCE BETWEEN END USER METRO    TELESPEED      TELESPEED     TELESPEED     TELESPEED     TELESPEED
  AREA AND CUSTOMER METRO AREA     REMOTE 144    REMOTE 192     REMOTE 384    REMOTE 768    REMOTE 1.1     TELESPEED
                                    MONTHLY        MONTHLY       MONTHLY       MONTHLY       MONTHLY       REMOTE 1.5
                                     CHARGE        CHARGE         CHARGE        CHARGE        CHARGE     MONTHLY CHARGE
--------------------------------- ------------- -------------- ------------- ------------- ------------- ---------------
<S>                               <C>           <C>            <C>           <C>           <C>           <C>
Less than 500miles                $[ * ]        $[ * ]         $[ * ]        $[ * ]        $[ * ]        [ * ]
--------------------------------- ------------- -------------- ------------- ------------- ------------- ---------------
Greater than 500 miles            $[55.00]      $[55.00]       $[95.00]      $[180.00]     $[210.00]     [NA]
--------------------------------- ------------- -------------- ------------- ------------- ------------- ---------------
</TABLE>

In addition to the other charges for TeleSpeed Services, Customer shall pay the
applicable TeleSpeed Remote Monthly Charges set forth above. If TeleSpeed Remote
is ordered at the same time as the TeleSpeed End User Circuit, then no
additional one-time order charges apply.

[*] 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.

                                       15
<PAGE>

Additional service charges may apply if TeleSpeed Remote Service is added to or
removed from an installed End User TeleSpeed Circuit. TeleSpeed Remote Services
are not included for purposes of determining whether Customer has met its Volume
Commitment Level.

For Customer to order TeleSpeed Remote Services, such service must be available
in both the metropolitan area where the End User TeleSpeed Circuit will be
ordered and the metropolitan area where the Customer maintains a Customer
Circuit. Standard TeleSpeed Services may be available within a metropolitan area
before TeleSpeed Remote Service is available.

<TABLE>
<CAPTION>
------------------------------------------------------- -------------------------------------------------------------
REGION                                                                  METRO AREAS WITHIN 500 MILES
------------------------------------------------------- -------------------------------------------------------------
<S>                                                     <C>
Atlanta, Georgia                                        Raleigh, NC
------------------------------------------------------- -------------------------------------------------------------
Austin, Texas                                           Dallas, TX; Houston, TX
------------------------------------------------------- -------------------------------------------------------------
Baltimore, Maryland/Washington, D.C.*                   Boston, MA; New York, NY; Philadelphia, PA; Raleigh, NC;
                                                        Detroit, MI
------------------------------------------------------- -------------------------------------------------------------
Boston, Massachusetts                                   New York, NY; Philadelphia, PA; Baltimore, MD; Washington,
                                                        D.C.
------------------------------------------------------- -------------------------------------------------------------
Chicago, Illinois                                       Detroit, MI; Minneapolis, MN
------------------------------------------------------- -------------------------------------------------------------
Dallas, Texas                                           Austin, TX; Houston, TX
------------------------------------------------------- -------------------------------------------------------------
Denver, Colorado                                        - none -
------------------------------------------------------- -------------------------------------------------------------
Detroit, Michigan                                       Chicago, IL; Philadelphia, PA; Baltimore. MD; Washington,
                                                        D.C.
------------------------------------------------------- -------------------------------------------------------------
Houston, Texas                                          Dallas, TX; Austin, TX
------------------------------------------------------- -------------------------------------------------------------
Los Angeles, California                                 San Diego, CA; San  Francisco,  CA; Sacramento, CA;
                                                        Phoenix, AZ
------------------------------------------------------- -------------------------------------------------------------
Miami, Florida                                          none -
------------------------------------------------------- -------------------------------------------------------------
Minneapolis, Minnesota                                  Chicago, IL; Detroit, Ml
------------------------------------------------------- -------------------------------------------------------------
New York, New York                                      Boston. MA; Philadelphia, PA; Baltimore, MD; Washington,
                                                        D.C.;
------------------------------------------------------- -------------------------------------------------------------
Portland, Oregon                                        Raleigh, NC
------------------------------------------------------- -------------------------------------------------------------
Philadelphia, Pennsylvania                              Seattle, WA
------------------------------------------------------- -------------------------------------------------------------
Phoenix, Arizona                                        Boston, MA; New York, NY; Baltimore, MD; Washington, D.C.;
                                                        Raleigh, NC: Detroit, Ml
------------------------------------------------------- -------------------------------------------------------------
Raleigh, North Carolina                                 San Diego, CA; Los Angeles, CA, Atlanta, GA,
                                                        New York, NY; Philadelphia, PA; Baltimore, MD, Washington, D.C.
------------------------------------------------------- -------------------------------------------------------------
Sacramento, California                                  San Diego, CA; San Francisco, CA; Los Angeles, CA; San
                                                        Francisco, CA; Los Angeles, CA; Phoenix, AZ
------------------------------------------------------- -------------------------------------------------------------
San Diego, California                                   Portland, OR
------------------------------------------------------- -------------------------------------------------------------
Seattle, Washington                                     San Diego, CA; Sacramento, CA; Los Angeles, CA
------------------------------------------------------- -------------------------------------------------------------
</TABLE>

                                       16
<PAGE>

          Price Schedule - TeleSpeed-Registered Trademark- Services
          ---------------------------------------------------------

*        The Baltimore, MD and Washington, D.C. metro areas are considered the
         same metropolitan region for purposes of TeleSpeed Remote.

                                       17
<PAGE>

                     Price Schedule - TeleSurfer-SM- Services
                     ----------------------------------------

OVERVIEW

This Service Level Agreement (SLA) covers the business-grade TeleSpeed Services
applies only to Covad Regional Networks, End User TeleSpeed Circuits and
Customer Circuits provided by Covad. This SLA does not apply to any other
Services, such TeleSpeed Remote Services or consumer-grade TeleSurfer-TM-
Services, or Customer-provided Customer Circuits (except for Network
Availability SLA which does include the Customer Circuit). Covad will provide
detailed reports to our Customers, an activity that is now in progress. This SLA
covers the following performance parameters:

-        Network Availability

-        Network Delay

-        Message Delivery

-        Mean Response Time

-        Mean Time to Restore Service

-        End User Premise Equipment Warranty

-        Inside Wire Warranty

This SLA will assist Covad and Customer in providing business-level service to
End Users. In this SLA, "End User" refers to teleworkers, small businesses, and
other End Users of Covad TeleSpeed service; "Customer" refers to channel
partners (ISPs and other value-added resellers) and corporations who directly
purchase TeleSpeed Services. "Regional Network" refers to the Covad network
within a served metropolitan area (e.g. the Boston Regional Network, the Los
Angeles Regional Network). "PVC" refers to a Permanent Virtual Circuit,
permanent configured paths on the Covad network connecting End Users to
corporations or ISPS. "Ingress" is the point where End User traffic enters the
Covad network (e.g. DSLAM); the "Egress" is the point where End User traffic
leaves the Covad network (e.g. where data leaves the Covad ATM switch and enters
the Customer Circuit). Finally, "Effected PVCs" discussed in the service credits
refer only to End Users who notify the Customer regarding performance issues
covered hereunder.

NETWORK AVAILABILITY

Covad is committed to providing a reliable network for its Customers. With that
goal, Covad's target for Network Availability is an average of 99.9% per month.
Covad's Network Operations Center maintains data to support the measurement of
availability. Covad Network Availability is defined as:

                                       18
<PAGE>

                     Price Schedule - TeleSurfer-SM- Services
                     ----------------------------------------

         1 -      (TOTAL MINUTES OF PVC DOWNTIME IN GIVEN MONTH)
                    --------------------------------------------
                   (         # of available minutes in same month        )

Network Availability is measured from the ingress interface on Covad's Regional
Network up to, but not including, the Egress interface at the Customer network
(see Figure 1).

             FIGURE 1: SLA BOUNDARIES FOR COVAD NETWORK AVAILABILITY

                            ------------------------------------------------
                            Diagram of Covad Regional Network

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

The availability target does not account for scheduled outages on Covad's
Regional Network or events outside of Covad's control, including, but not
limited to, force majeure events, scheduled or unscheduled outages on the
Customer Network, or End User or Customer equipment outages. Network downtime is
calculated commencing with the date and time on which the Customer or Covad
opens the trouble ticket (whichever was first) and ending upon confirmation from
Covad that the network is restored.

If Covad does not meet 99.9% Network Availability per the above definition,
Covad will credit the Customer for each affected End User according to the
following table:

<TABLE>
<CAPTION>
              --------------------------------- ------------------------------------------------------
              IF AVAILABILITY IS IN THE         SERVICE CREDIT PER AFFECTED END USER PER
              RANGE:                            MONTH IS:
              --------------------------------- ------------------------------------------------------
              <S>                               <C>
              99.5% - 99.89%                    5% of monthly End User Tele pee service charger
              Average per month

              --------------------------------- ------------------------------------------------------
              LESS THAN 99.5                    10% of monthly End User TeleSpeed service charges
              Average per month
              --------------------------------- ------------------------------------------------------
</TABLE>

Reports and service credits will be available by December 31, 1999.

NETWORK DELAY

Covad is committed to providing a fast network for its Customers. Covad supports
targets for the time to transmit a 64-byte message from the ingress interface on
Covad's Regional Network up to the egress interface on Covad's Regional Network
(see Figure 2).

                                       19
<PAGE>

                     Price Schedule - TeleSurfer-SM- Services
                     ----------------------------------------

                     FIGURE 2: BOUNDARIES FOR DELAY TARGETS

                            ------------------------------------------------
                            Diagram of Covad Regional Network

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

Covad defines round trip message delay as the sum of the following:

-        time from when the last bit of the message originating from the End
         User arrives at Covad's Regional Network unfit when the last bit of the
         message leaves Covad's Regional Network

-        time from when the last bit of the return message arrives at Covad's
         Network until when the last bit of the message leaves Covad's Regional
         Network

Covad's delay targets for its offered TeleSpeed services for 64-byte messages,
when the network is available as defined in the Network Availability SLA are as
follows

<TABLE>
<S>                                                        <C>
             --------------------------------------------- ----------------------------------------------
                      END USER TELESPEED SERVICE                   AVERAGE MESSAGE DELAY TARGET
             --------------------------------------------- ----------------------------------------------
             TeleSpeed 192, 384, 768. 1.1, 1.5                                 10ms
             --------------------------------------------- ----------------------------------------------
             TeleSpeed 144                                                     15ms
             --------------------------------------------- ----------------------------------------------
</TABLE>

When reporting is available, the delay target will be measured and averaged on
the hour. By December 31, 1999, Covad will make reports and service credits
available around its network delay targets.

DELIVERY

Covad is committed to minimizing network congestion for its Customers. Covad's
target for delivery of cells/frames over Covad's Regional Network is 99.9% over
a 1-hour period when the network is available.

Covad defines delivery as the percentage of cells or frames entering Covad's
Regional Network that are successfully carried through the network and not
dropped before exiting the network (see Figure 3).

                      FIGURE 3: SLA BOUNDARIES FOR DELIVERY

                            ------------------------------------------------
                            Diagram of Covad Network

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

                                       20
<PAGE>

                     Price Schedule - TeleSurfer-SM- Services
                     ----------------------------------------

By December 31. 1999, Covad will make reports and service credits available
around its network delivery targets.

MEAN RESPONSE TIME

Covad is committed to providing the best Customer care experience in the
telecommunications industry. To that end, Covad promises to respond to Customer
requests for repair and other technical problems within a mean time of 15
minutes (averaged per month on all response times for all submitted web-based
Trouble Tickets) during normal TAC (Technical Assistance Center) business hours.

MEAN TIME TO RESTORE SERVICE

Covad is committed to restoring service within certain periods of time based on
the seventy of the problem, and whether single or multiple End Users are
affected. Covad manages to and the following targets for restoration of
services:

END USER TELESPEED CIRCUIT:

-        End User TeleSpeed circuit defined as the copper loop from (but not
         including) the End User premise equipment to the copper loop entry
         point into the Covad Regional Network

-        MEAN time to repair for all submitted Trouble Tickets shall target 24
         hours averaged on a per month basis

CUSTOMER TELESPEED CIRCUIT:

-        Customer TeleSpeed circuit is defined as the Covad-provided DS1/Frame
         Relay or DS3/ATM Customer WAN circuit from the egress of the Covad
         Network up to Covad's point of demarcation at the Customer premise, up
         to but not including the Customer-owned router or other equipment

-        MEAN time to repair of the Customer TeleSpeed circuit is targeted at 4
         hours

-        Outage of Customer TeleSpeed circuit shall be compensated by credits in
         Network Availability Service Level Agreement

Covad will manage the local loop vendor (or Incumbent Local Exchange Carrier) on
behalf of the Customer for any repairs or problems related to Covad-provided
Customer TeleSpeed WAN Circuits or End User TeleSpeed Circuits.

                                       21
<PAGE>

                     Price Schedule - TeleSurfer-SM- Services
                     ----------------------------------------

END USER PREMISE EQUIPMENT WARRANTY

If the Customer purchases End User premise equipment directly from Covad, Covad
will assign, to the extent permitted, the manufacturer's warranty of at least
one (1) year. In the event that the equipment is determined to be faulty within
the applicable warranty period, Covad will mail the pre-configured replacement
equipment to the Customer to arrive within 3 business days of Covad's
determination that the End User premise equipment requires replacement.
Customers who request that a Covad Field Service Technician (FST) provide
replacement equipment will be charged applicable Service Order Charges as set
forth in the applicable Price Schedule. Covad will also provide any equipment
software upgrades for the duration of the applicable warranty at no charge to
the Customer.

After one year, repair and replacement of Covad-supplied End User premise
equipment becomes the responsibility of the Customer.

Customer is responsible for all equipment configuration or Covad-supplied
equipment after initial setup.

INSIDE WIRE WARRANTY

All Covad-provided End User premise wiring is warranted to be free from defects
for a period of 30 days.

CREDIT AVAILABILITY

Service credits hereunder must be claimed within 7 calendar days of the date of
the reported incident. In the event that two or more credits are simultaneously
claimed, a credit will be applied toward the single claim resulting in the
largest credit. Covad will apply any service credits to the Customer's next
monthly invoice.

                                       22
<PAGE>

      Market Development Funds - TeleSpeed-Registered Trademark- Services
      -------------------------------------------------------------------

DESCRIPTION OF TELESURFER SERVICES

<TABLE>
<S>                                         <C>                                      <C>
------------------------------------------- ---------------------------------------- -----------------------------------------
Service Name                                Maximum Throughput Downstream            Maximum Throughput Upstream
------------------------------------------- ---------------------------------------- -----------------------------------------
TeleSurfer                                              Up to 384 Kbps                            Up to 128 Kbps
------------------------------------------- ---------------------------------------- -----------------------------------------
TeleSurfer Pro                                          Up to 768 Kbps                            Up to 384 Kbps
------------------------------------------- ---------------------------------------- -----------------------------------------
</TABLE>

For TeleSurfer and TeleSurfer Pro, Covad guarantees no less than 64 Kbps of
bandwidth, downstream and upstream, in congested network traffic situations.
Customer is also responsible for dynamic configuration of IP addresses for End
Users using consumer-grade TeleSurfer and TeleSurfer Pro Services.

TELESURFER SERVICE VOLUME COMMITMENT PRICING

The following are the monthly charges for End User TeleSurfer Circuits.

The applicable monthly charges for TeleSurfer Services shall be as set forth on
the table below based upon Customer's applicable Volume Commitment Level.
Customer must be current on all invoices to be eligible for such pricing. If
Customer fails to meet its Volume Milestones for such Volume Commitment Level,
the monthly charges shall be adjusted based upon the number of End User Circuits
(TeleSpeed and TeleSurfer) invoiced for the prior month. Customer must be
current on all invoices to be eligible for such pricing.

END USER TELESURFER MONTHLY CHARGES

                           TELESURFER MONTHLY CHARGES

<TABLE>
<S>                              <C>                       <C>
     --------------------------- ------------------------- ----------------------
       Volume Level Invoiced            TeleSurfer            TeleSurfer Pro
     --------------------------- ------------------------- ---------------------
     0 - 999                     $[ * ]                    $[ * ]
     --------------------------- ------------------------- ---------------------
     1,000 - 2,499               $[ * ]                    $[ * ]
     --------------------------- ------------------------- ---------------------
     2,500 - 4,999               $[ * ]                    $[ * ]
     --------------------------- ------------------------- ---------------------
     5,000                       $[ * ]                    $[ * ]
     --------------------------- ------------------------- ---------------------
</TABLE>

END USER TELESURFER CIRCUIT ORDER CHARGES

<TABLE>
<S>                                                    <C>                                     <C>
------------------------------------------------------ --------------------------------------- -------------------------
END USER PROMISE EQUIPMENT                             APPLICABLE TELESURFER SERVICE           ONE-TIME CHARGE
------------------------------------------------------ --------------------------------------- -------------------------
Efficient Networks Speedstream 5250 SDSL Modem         TeleSurfer, TeleSurfer Pro              $[ * ]
------------------------------------------------------ --------------------------------------- -------------------------
</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.

                                       23
<PAGE>
      Market Development Funds - TeleSpeed-Registered Trademark- Services
      -------------------------------------------------------------------

<TABLE>
<S>                                                                                            <C>
---------------------------------------------------------------------------------------------- -------------------------
                              TELESURFER SERVICE ORDER CHARGES                                 ONE-TIME CHARGE
---------------------------------------------------------------------------------------------- -------------------------
Service Setup including provisioning of PVC (0-999 circuits invoiced)                          $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
Service Setup including provisioning of PVC (1 000 + circuits invoiced)                               $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
Inside wiring from RJ45 Wall Jack to NID (optional)                                                   $[ * ]*
---------------------------------------------------------------------------------------------- -------------------------
Field Technician Dispatch (during normal business hours)                                              $[ * ]*
---------------------------------------------------------------------------------------------- -------------------------
*.  FIRST HOUR/MINIMUM CHARGE. FOR EACH ADDITIONAL 15 MINUTES:  $[20]
---------------------------------------------------------------------------------------------- -------------------------
Field Technician Dispatch (other hours: after hours, weekends, holidays)                             $[ * ]**
---------------------------------------------------------------------------------------------- -------------------------
**   First hour/Minimum Charge. For each additional 15 minutes:  $[25]
---------------------------------------------------------------------------------------------- -------------------------

---------------------------------------------------------------------------------------------- -------------------------
                                    OTHER SERVICE CHARGES                                      ONE-TIME CHARGE
---------------------------------------------------------------------------------------------- -------------------------
Upgrade/downgrade of End User TeleSurfer Service (involves a dispatch of FT)                          $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
Upgrade/downgrade of End User TeleSurfer Service (no dispatch of FT)                                  $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
End User TeleSurfer Circuit Disconnect  ee (pr circuit)                                               $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
End User TeleSurfer Circuit Cancellation Fee (per circuit)                                            $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
Missed Appointment (i.e., End User no-show) Charge                                                    $[ * ]
---------------------------------------------------------------------------------------------- -------------------------
</TABLE>

As a condition of Covad making TeleSurfer Services available to Customer,
Customer is required to commit to construct an Electronic Customer Interface
(ECI) between Customer and Covad in order to process orders for all End User
Circuits (TeleSpeed and TeleSurfer). Customer agrees to create a plan for an
Electronic Customer Interface. Covad will contact Customer to offer guidance,
planning, and ECI implementation milestones. Customer agrees to use commercially
reasonable efforts to ensure that TeleSurfer lines are installed at residential
addresses only.

COVAD RESERVES THE RIGHT TO BILL CUSTOMER FOR SERVICES AT APPLICABLE TELESPEED
SERVICES PRICES FOR ANY TELESURFER CIRCUITS INSTALLED AT LOCATIONS DEEMED TO BE
NON-RESIDENTIAL.

Market Development Funds will not accrue for TeleSurfer Circuits invoiced.
Market Development Funds are not available for marketing activities that only
promote TeleSurfer Services.

Customer agrees to use commercially reasonable efforts to fully disclose to End
Users the features and limitations of TeleSurfer Services prior to ordering
TeleSurfer Services for such End User.

[*] 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.

                                       24
<PAGE>

      Market Development Funds - TeleSpeed-Registered Trademark- Services
      -------------------------------------------------------------------

As a part of Covad's Channel Marketing Program, Customer is eligible for Market
Development Funds ("MDF"). Disbursement of all MDF is contingent upon a jointly
agreed upon, integrated marketing plan and Customer's ability to match MDF
"dollar for dollar." The timing, form, message, media, substance, and geographic
focus of the marketing spending will be jointly determined by Customer and
Covad. Customer agrees to abide by Covad's standard MDF Program Guidelines
including use of the Covad brand and MDF disbursement criteria.

INITIAL MARKET DEVELOPMENT FUNDS

During the first six (6) months of the Agreement, Covad will contribute Initial
MDF to Customers' Covad-managed MDF account based on the following schedule, in
accordance with Customer's Volume Commitment for TeleSpeed Services:

<TABLE>
<S>                             <C>                          <C>                          <C>
------------------------------- ---------------------------- ---------------------------- ----------------------------
   ANNUAL VOLUME COMMITMENT        6-MONTH RAMP BASED ON      INITIAL MDF PER TELESPEED     RANGE OF MOF ALLOCATION
 (INVOICED END USER CIRCUITS)    VOLUME COMMITMENT (35% OF        END USER CIRCUIT
                                    VOLUME COMMITMENT)
------------------------------- ---------------------------- ---------------------------- ----------------------------
            1,000                           350                       $[ * ]                     $[ * ]
------------------------------- ---------------------------- ---------------------------- ----------------------------
            2,500                           875                       $[ * ]                     $[ * ]
------------------------------- ---------------------------- ---------------------------- ----------------------------
            5.000                          1,750                      $[ * ]                     $[ * ]
------------------------------- ---------------------------- ---------------------------- ----------------------------
</TABLE>

Initial MDF must be spent within 6 months following the Effective Date of the
Agreement. Customer can choose to spend up to 70% of Initial MDF at any time
during the first 3 months and the remaining 30% at any time during the second 3
months after the Effective Date of the Agreement. Customer forfeits any unspent
MDF at the end of the 6-month period.

For example, if Customer commits to a 1,000 Circuit Volume Commitment, Covad
will place $[ * ] into a Covad-managed MDF account for Customer. This amount
is derived by multiplying the initial MDF per circuit $[ * ] by the 6-month ramp
(1,000 x 35% = 350). Of the $[ * ], $[ * ] (or 70%) must be spent any time
within the first three months, and the remaining $[ * ] (30%) must be spent
any time within the following 3 months.

Initial MDF is in lieu of Accrual MDF (defined below) during the first six (6)
months of the Agreement. Accrual MDF will begin to accrue in month seven (7)
based on the six-months (6) invoice to Customer.

ACCRUAL MARKET DEVELOPMENT FUNDS

Accrual MDF is available to Customer beginning in month seven (7) after the
Effective Date to develop or continue demand generation programs associated with
the purchase of TeleSpeed Services. The MDF Accrual Percentage is determined by
Customer's Volume Commitment as per the table below. THE MDF ACCRUAL PERCENTAGE
IS APPLIED TO CUSTOMER'S TOTAL END USER TELESPEED CIRCUITS (TELESPEED 144,
TELESPEED 384, TELESPEED 768, TELESPEED 1.1, AND TELESPEED 1.5) INVOICED EACH
MONTH, THROUGH TERMINATION OF THE AGREEMENT. MDF will not

[*] 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.

                                       25
<PAGE>

      Market Development Funds - TeleSpeed-Registered Trademark- Services
      -------------------------------------------------------------------

accrue for TeleSurfer-SM- Circuits invoiced. Customer must be current on all
invoices to be eligible for MDF. MDF are not available for marketing activities
that only promote TeleSurfer Services. Accrual MDF are placed into a
Covad-managed Customer account every month after each invoice has been paid.
Disbursement of Accrual MDF follows standard MDF Guidelines including
development of joint-marketing plans and Covad logo usage. Accrual MDF will only
accumulate for six (6) months. Any Accrual MDF that remains unused for longer
than six (6) months WHI be forfeited and returned to Covad.

<TABLE>
<S>                                                    <C>
------------------------------------------------------ ---------------------------------------------------------------
        NUMBER OF INVOICED END USER TELESPEED                          MONTHLY-MDF ACCRUAL PERCENTAGE
         CIRCUITS AS OF THE END OF THE MONTH
------------------------------------------------------ ---------------------------------------------------------------
                    1,000 - 2,499                                                   [ * ]%
------------------------------------------------------ ---------------------------------------------------------------
                    2,500 - 4.999                                                   [ * ]%
------------------------------------------------------ ---------------------------------------------------------------
                    5,000 - 9,999                                                   [ * ]%
------------------------------------------------------ ---------------------------------------------------------------
</TABLE>

EXAMPLE: MONTHLY INVOICE AFTER VOLUME DISCOUNT (ASSUME 5,000 VOLUME COMMITMENT
LEVEL IN REGION A)

Accrual MDF will accrue at a rate associated with the Customer's Volume
Commitment Level. An example of one month's accrual calculation is listed below.

MDF CALCULATION

<TABLE>
<S>                                                  <C>
Number of End User TeleSpeed Circuits:               5,100
Total End User TeleSpeed Circuit invoice:            $[ * ]
MDF %:                                                [ * ]
MDF accrued for the month:  $[ * ] x [ * ]     =     $[ * ]
</TABLE>

Covad places this $[ * ] Customer's MDF account upon receipt of payment of
all outstanding invoices.

FAILURE TO MEET COMMITMENT

If Customer does not meet or exceed its Volume Commitment Level in month three
(3), as detailed in the Volume Milestone Schedule, Customer will receive only
Accrual MDF. Accrual MDF will be calculated as detailed above. if Customer does
not meet or exceed its line commitment in month three (3), but does meet or
exceed its volume commitment in month six (6), Covad will credit MDF for months
4-6 to Customer's MDF account up to the Initial MDF for those months. In no case
will Covad credit both Accrual MDF and Initial MDF for the same month.

If Customer does not meet or exceed any of its Volume Commitments as detailed in
the Volume Milestone Schedule for months 3, 6, or 9, then Customer will receive
Accrual MDF at the Accrual Percentage associated with Customer's actual Volume
Level (as opposed to Volume Commitment Level).

[*] 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.

                                       26<PAGE>

                                                                   Exhibit 10.27

                                  LEASE AGREEMENT

     THIS LEASE AGREEMENT ("Agreement"), made as of the 15 day of November,
1999, between 65 PUBLIC SQUARE ASSOCIATES, PNC Bank Building (hereinafter
referred to as "Lessor"), and FASTNET CORPORATION (hereinafter referred to as
"Lessee").

                                W I T N E S S E T H:

     In consideration of the mutual covenants contained herein and other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, and intending to be legally bound, the parties hereto agree as
follows:

     1. DEMISED PREMISES. Lessor hereby leases to Lessee that certain space
commonly referred to as Suite 11 17 located on the Eleventh (11th) floor of
Lessor's PNC Bank building at Sixty Nine Public Square, in the City of
Wilkes-Barre, Lucerne County, Pennsylvania, (hereinafter referred to as the
"Building"), and that additional space on the roof of the Building necessary to
accommodate the installation of one six (6') foot microwave dish. The Building
and rooftop space described above are hereinafter referred to as the "Demised
Premises" and are more particularly shown in the attached Exhibit A which is
incorporated herein by reference. This Facility is defined as and includes
utility connections and necessary technical appurtenances, for the purposes of
establishing a cellular, paging, microwave, wireless, or related (including such
other forms of data transmission as may be developed based on existing or future
technologies)

<PAGE>

communications facility. Included with this Lease is Lessee's right to install a
sprinkler system(s), fire suppression system, HVAC system and a security system
(as determined necessary by Lessee) in the entranceway, and the right to add
sealed batteries. Also included with this Lease is Lessee's right to install a
generator in the basement of the Building at a location to be agreed upon by
Lessor and Lessee as depicted on the attached Exhibit A-1, which is incorporated
herein by reference. Lessee shall have twenty-four (24) hour access seven (7)
days a week to the basement of the Building. An escorted access to the basement
shall be provided by Lessor upon Lessee paging Lessor's designated maintenance
person. Lessee, its agents, employees, contractors and business visitors shall
have at all times the free and uninterrupted right to use public entrances,
elevators and stairways in the Building in order to gain access to the Demised
Premises. Lessee shall be afforded all necessary access to construct, maintain,
and inspect its equipment and to permit officials from the Federal
Communications Commission to make any necessary inspections.

     2. TERM. This Agreement shall commence on the date hereof and shall
continue in effect for an initial term (hereinafter referred to as the "Original
Term") of five (5) years from the Rental Commencement Date (as defined below).
Thereafter, this Agreement shall continue in force and effect upon the terms and
conditions contained herein for four (4) renewal terms of five (5) years each
(hereinafter referred to as the "Renewal Term(s)"), at Lessee's sole
determination, unless Lessee provides to Lessor written notice of its intention
not to renew this Agreement at least ninety (90) days before the expiration of
the Original Term or any Renewal Term. Lessee shall have the right to

                                       2

<PAGE>

terminate this Agreement at any time during any Renewal Term, any such
termination to be effective sixty (60) days after notice of termination is
received by Lessor If Lessee terminates this Agreement during a Renewal Term,
Lessee shall pay Lessor a termination fee equal to three (3) months of the then
current rent.

     3. RENT.

     (a) The rent for each year of the Original Term shall be in the amount
[ *  ] to be paid in equal monthly installments of [ * ] beginning on the
Rental Commencement Date (as defined below), provided, however, that
beginning on the date that this Agreement is executed by Lessor, and
continuing until the Rental Commencement Date, Lessee shall pay to Lessor
monthly rent ("Interim Rent") in the amount of [ * ].

     (b) Monthly rental payments shall be due and payable on the first day of
the month. If the date upon which this Agreement is executed by Lessor is not
the first day of the month, the Interim Rent for the first month shall be
prorated and shall be due on the first day of the following month along with the
first full monthly Interim Rent payment. Monthly rental payments shall be paid
to Lessor at the address set forth in Section 28 or to such other address as
Lessor may, from time to time, designate in writing at least thirty (30) days in
advance of any rental payment date. Such monthly installments shall be deemed
late if not received by Lessor by the tenth (10th) day of each

[*] 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.

                                       3

<PAGE>

month, and shall bear interest at the rate of six percent (6%) per annum
thereafter until paid with interest accruing upon the first day late, i.e., the
eleventh (11th) day of the month.  Lessor must notify Lessee in writing of
failure to receive a rental payment as set forth in Section 13 in the manner
prescribed in Section 28.

     (c) The Rental Commencement Date shall be the first day of the first month
following the date upon which Lessee or its contractor first commences physical
construction of the improvements described in Section 1. The conducting of any
Engineering Analysis (as defined in Section 7(a)) or any pre-construction
activities (including but not limited to surveying, frequency coordination,
installation coordination) shall not be deemed to be physical construction.

     (d) If the Rental Commencement Date has not occurred on or before ninety
(90) days after execution of this Agreement, Lessor shall have the conditional
right to terminate this Agreement. Should Lessor elect to terminate pursuant to
this section, Lessor shall provide written notice of such intent to Lessee.
Within thirty (30) days of receipt of such notice, Lessee shall have the option
to commence payment of full rent, in which case the Rental Commencement Date
shall be deemed to be the date of Lessee's receipt of Lessor's notice to
terminate and such notice to terminate shall be null and void.

     (e) The annual rent for each Renewal Term shall be equal to the rent paid
for the immediately preceding Renewal Term or Original Term plus [ * ].

[*] 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.

                                       4
<PAGE>

     4. Taxes. Lessor is responsible for the timely payment of all property
taxes affecting the Demised Premises. Lessee, upon presentation of sufficient
and proper documentation, shall pay as additional rent an amount equal to any
increase in real estate taxes levied against the Demised Premises which are
directly attributable to the improvements constructed by Lessee on the Demised
Premises.

     5. Utilities. Lessee's electrical service shall be separately metered, at
Lessee's sole cost and expense, Lessee shall promptly pay all utility charges
attributable to Lessee's use of the Demised Premises directly to the utility
company. Lessor shall fully cooperate with any utility company requesting an
easement over and across the land upon which the Demised Premises is located in
order that such utility company may provide service to Lessee. Lessee and the
utility company providing services to Lessee shall have access to all areas of
the Building necessary for installation, maintenance and/or repair of such
service.

     6. PERMITTED USE. Lessee shall use the Demised Premises for the purpose of
constructing, maintaining and operating a cellular, paging, microwave, wireless
or related (including other forms of data transmission as may be developed or
modified based on existing or future technologies) communications facility
(hereinafter referred to as the "Facility). Such communications operations shall
be conducted in accordance with the standards imposed by the Federal
Communications Commission, and any other local, state or federal body with
authority over such operations. All improvements required by Lessee shall be at
Lessee's expense and shall in no event be considered a part of the

                                       5
<PAGE>

Building for purposes of ownership. Any alterations or attachments to the
Building by Lessee shall require the written consent of Lessor, which shall not
be unreasonably withheld or delayed. The rules and regulations set forth in
Exhibit "B" of this Agreement shall be considered a part of this Agreement and
Lessee covenants that the rules and regulations shall be faithfully observed and
performed by Lessee and Lessee's employees.

     7. Necessity of Permits, Right to Terminate.

     (a) This Agreement and Lessee's obligations hereunder are contingent upon
its obtaining, after the execution date of this Agreement, all certificates,
permits, zoning relief and other approvals that may be required by any federal,
state or local authority, including without limitation the Federal
Communications Commission and the Federal Aviation Administration, (hereinafter
referred to as the "Permits"), as well as satisfactory engineering tests,
including profile analysis, frequency coordination and other site or
environmental testing (hereinafter referred to as the "Engineering Analysis"),
which will permit Lessee to use the Facility and Demised Premises for its
intended purposes, as set forth herein. Lessee is hereby given the right to
conduct surveys, radio coverage tests, and other investigations needed to secure
the foregoing Permits and Engineering Analysis, including the right to enter
Lessor's property as required.

     Lessee shall diligently pursue all Permits and complete the Engineering
Analysis in a reasonable and timely manner. Notwithstanding this obligation of
Lessee, the determination as to the initiation of or response to judicial or
administrative appeals shall rest solely with Lessee, and Lessor agrees that
such determination shall be conclusive.

                                       6

<PAGE>

     Lessor shall cooperate with Lessee in its effort to obtain any and all
Permits, if requested, and shall neither take nor permit any action that would
adversely affect the status of the Demised Premises or the Facility with respect
to the proposed use thereof by Lessee.

     (b) With respect to the Engineering Analysis, such activities require
ongoing site investigations, which will transpire after the execution date of
this Agreement. Lessor specifically acknowledges and agrees that Lessee shall
have the fight to terminate this Agreement in the event that its Engineering
Analysis, in the sole discretion of Lessee, indicates that the Demised Premises
and/or Facility is not acceptable or capable of being used as contemplated under
this Agreement. The period for completing the Engineering Analysis, which would
allow Lessee's termination hereunder, shall be ninety (90) days from the
execution date of this Agreement. In the event of termination pursuant to this
Section, Lessee agrees to pay Lessor an amount equal to three (3) months' full
rent as a termination fee, which shall render this Agreement null and void and
shall terminate the obligations of the parties hereunder (excluding, however,
the obligations set forth in Section 8 hereunder).

     (c) If any one or more of the Permits is denied, refused, canceled or is
otherwise withdrawn, terminated, or materially modified by any governmental
authority, or if any third party action or Act of God substantially limits the
Facility's operations or utility to Lessee, Lessee may terminate this Agreement
upon written notice to Lessor, whereupon this Agreement shall become null and
void and the parties shall have no

                                       7

<PAGE>

further obligations to each other under the terms of this Agreement (excluding,
however, the obligations set forth in Section 8 hereunder). If any rental
payments have been made before the effective date of termination, they shall be
retained by Lessor- If any permits are refused or denied following commencement
of construction, resulting in this Agreement being terminated, Lessee shall pay
Lessor an amount equal to three (3)months full rent as a termination fee.

     8. REMOVAL OF LESSEE'S IMPROVEMENTS UPON TERMINATION. Lessor covenants and
agrees that no part of the improvements constructed, erected or placed by Lessee
on the Demised Premises shall become, or be considered as being affixed to or a
part of, the Demised Premises or Lessor's Property, it being agreed by Lessor
that all improvements of any kind and nature constructed or placed by Lessee on
the Demised Premises shall not be considered fixtures, but shall be and remain
the personal property of Lessee. Lessee, upon termination or expiration of this
Agreement shall within 120 days, remove all such improvements from the Demised
Premises. Lessee shall be required to continue making monthly rental payments
until such time as all improvements are removed from the Demised Premises. The
Demised Premises shall be returned in a condition that reasonably matches its
original condition, reasonable wear and tear, condemnations, casualty and
destruction, and any hazardous materials not placed on or about the Demised
Premises by Lessee, its agents, employees or contractors excepted. In the event
Lessee fails to remove its improvements within the requisite time period, Lessee
shall be liable to Lessor for double the rental amounts during Lessees holdover
period.

                                       8

<PAGE>

     9. MAINTENANCE OF DEMISED PREMISES. Lessee shall maintain the Demised
Premises in reasonable condition, free and clear of any debris and waste
products. Lessor shall be responsible for the removal of reasonable trash and
debris, provided such trash and debris can be readily disposed. Lessee will
resolve technical interference problems with other then existing equipment
located at the Building on the Rental Commencement Date or any future equipment
that Lessee attaches to the Building at the time of installation of that
equipment. Lessor shall not permit the installation of any future equipment to
result in the technical interference with Lessee's then existing equipment. In
the event Lessee experiences such interference, Lessor shall immediately take
all steps necessary to eliminate the interference.

     10. ENVIRONMENTAL WARRANTY. Lessor represents and warrants, to the best of
its knowledge, that the Demised Premises contain none of the following: (1)
hazardous substances, pollutants or contaminants as defined in the Comprehensive
Environmental Response Compensation and Liability Act (CERCLA), and successor or
related statutes, or other local, state or federal environmental law; or (2)
underground storage tanks. Further, Lessor represents and warrants that the
Demised Premises (including subsurface conditions thereof) are not in violation
of any state, federal, or local law, regulation, or ordinance. Lessor agrees to
indemnify, release, defend and save Lessee, its parents, subsidiaries and
affiliates, harmless from any and all losses, claims, liabilities, judgments,
damages, penalties, expenditures, costs, including reasonable attorneys' fees,
or other expenses (collectively "Damages") which Lessee may suffer or incur as a
result of, or related to, the environmental condition of the Demised Premises or
a breach of the

                                       9
<PAGE>

foregoing warranties. Lessor represents and warrants, to the best of its
knowledge, that the Building does not contain any asbestos or asbestos products.
To the extent Lessee encounters any asbestos in the installation of the
Facility, Lessor shall indemnify Lessee, its parents, subsidiaries and
affiliates from any and all Damages which may be suffered by Lessee or any other
party as a result of the presence of asbestos. Lessor shall assume all
responsibility for such removal and in no event will Lessee be required to
remove any asbestos. Lessee represents and warrants that it shall comply with
all environmental laws set forth above and shall indemnify the Lessor, its
successors and assigns from all damage which Lessor may suffer or incur as a
result of or related to Lessees actions or omissions for the environmental
conditions of the Demised Premises or a breach of the foregoing warranties.
Lessee makes no other representations except as herein contained or as set forth
elsewhere in this Agreement.

     11. INDEMNIFICATION. Lessee agrees to indemnify and save Lessor harmless
from and against any and all liability, damage, expense, claims or judgments,
including reasonable attorneys' fees, resulting from injury to person or damage
to property arising out of the use and occupancy of the Demised Premises by
Lessee if caused by the act or omission of Lessee, its agents, employees,
invitees or guests during the term of this Agreement. Lessor agrees to indemnify
and save Lessee, its parent, subsidiaries, affiliates, directors, officers,
employees, and agents, harmless from and against any and all liability, damage,
expense, claims or judgments, including reasonable attorneys' fees, resulting
from injury to person or damage to property arising out of the act or omission
of

                                       10
<PAGE>

Lessor, its agents, employees, invitees, guests or third parties during the term
of this Agreement.

     12. Insurance. Lessor and Lessee hereby mutually waive their respective
rights of recovery against each other to the extent of losses covered by
insurance for any loss insured by fire, extended coverage or other property
insurance policies, including "all risk" property insurance, existing for the
benefit of the respective parties, whether due to the negligence of Lessor,
Lessee or their respective agents, employees, contractors or invitees, or any
other cause. Each party shall ensure that each insurance policy obtained
provides that the insurer waives all rights of recovery by way of subrogation
against the other party and its agents and employees in connection with any
damage covered by such policies. Lessee agrees that it will, not later than the
Rental Commencement Date hereunder, maintain and pay for the following types of
insurance, and provide proof of such coverage when so requested by Lessor, and,
when requested in writing by Lessor, name Lessor as an additional insured:

     (a) Worker's Compensation Insurance for all employees who work on and visit
the Demised Premises; and

     (b) Commercial General Liability Insurance in the amount of $1,000,000.00
per occurrence $2,000,000.00 general aggregate $1,000,000.00 products/completed
operations Lessor shall maintain at all times during this Agreement fire and
property damage insurance policies in standard "all risk" form insuring Lessor
against loss from any physical damage to the Building with coverage of not less
than the full replacement

                                       11
<PAGE>

cost thereof If the Demised Premises or the Building is damaged by fire or other
casualty, Lessor shall restore the same to substantially the same condition
existing immediately prior to such damage. If, however, the Demised Premises
cannot be repaired within sixty (60) days from the occurrence of the fire or
casualty, then this Agreement shall be terminated at the option of Lessee. If
the repairs can be completed within the referenced sixty (60) days, then Lessor
shall make the repairs and the rent shall be apportioned and suspended while the
repairs are being made. Lessor shall not be liable for property damage suffered
by Lessee as a result of damage caused by water, snow, frost, steam, sewage,
gas, odors, bursting or leaking of pipes, or disrepair or failure of the heating
or cooling system, whether such damage is caused by Lessor, Lessor's employees
or other tenants.

     13. DEFAULT BY LESSEE. If Lessee defaults in the payment of the rent herein
agreed to be paid and such default is not cured within fifteen (15) days after
receipt by Lessee of written notice of such default, Lessor may terminate this
Agreement upon written notice to Lessee. If default is made in the performance
of any other material covenant of Lessee contained herein and such default is
not cured within thirty (30) days after receipt by Lessee of written notice of
such default, Lessor may terminate this Agreement upon written notice, provided
however, where any such default cannot reasonably be cured within thirty (30)
days, Lessor may not terminate this Agreement if Lessee commences to cure such
default within the thirty (30) day period and thereafter diligently pursues such
cure to completion.

                                       12
<PAGE>

     14. DEFAULT BY LESSOR. In the event Lessor fails to perform any of its
obligations under this Agreement and such default is not cured within thirty
(30) days after receipt of written notice from Lessee specifying the nature of
such default where such default could reasonably be cured, or fails to commence
such cure within said thirty (30) day period, Lessee shall have the option of
terminating this Agreement, proceeding in equity or at law or Lessee may cure
any default of Lessor. If all or any part of the Demised Premises is taken by
means of the exercise of eminent domain, whether by legal proceedings or
otherwise, or a voluntary sale or transfer by Lessor to any condemnor under
threat of condemnation or while legal proceedings for condemnation are pending,
or by inverse condemnation (a "Condemnation") and the Demised Premises is not
reasonably suitable for Lessee's continued occupancy for the permitted use, then
Lessee shall have the option to terminate this Agreement.

     15. QUIET TITLE; MORTGAGES. Lessor covenants that Lessee, upon paying the
rent and performing its covenants hereunder, shall peaceably and quietly have,
hold and enjoy the Demised Premises. Lessor represents and warrants that it has
good and marketable title to the Demised Premises, free and clear of all liens
and encumbrances, except mortgage(s). Lessor further represents and warrants
that this Agreement is not contrary to the terms of any such mortgage(s). Lessor
agrees to use all reasonable efforts to have any future mortgagee(s) execute a
non-disturbance agreement in a form reasonably acceptable to Lessee.

     16. AUTHORITY TO ENTER INTO AGREEMENT: NO RESTRICTIVE COVENANTS.

                                       13
<PAGE>

     (a) Lessor represents, covenants, and warrants that Lessor is seized of
good and sufficient title and interest to the Demised Premises and has full
authority to enter into and execute this Agreement. Lessor further represents,
covenants and warrants that there are no restrictive covenants, mortgage terms
or other matters encumbering the title to the Demised Premises which may
materially interfere with or prevent Lessee's use of the Demised Premises.

     (b) Lessor further represents and covenants to the best of its knowledge:

          (i) That Lessor is the sole party currently owning or having an
interest in the Demised Premises.

          (ii) That there are no suits, claims, proceedings, tax claims or
liens, judgments or the like affecting Lessor's title to the Demised Premises or
its ability to enter into this Agreement, or with respect to Lessee's rights
hereunder.

          (iii) That there are no rights, agreements, or interests in any third
party which would in any way limit Lessee's rights, use, or enjoyment hereunder.

     (c) Lessor acknowledges, agrees, and understands that Lessee is making a
significant financial investment and commitment of facilities and equipment to
and in the Demised Premises and the proposed Facility, and that Lessee is
relying on Lessees representations, which have induced Lessee to enter into this
Agreement.

     17. SALE OR FINANCING OF DEMISED PREMISES. Should Lessor, at any time
during the term of this Agreement, sell, refinance or otherwise encumber, all or
any part

                                       14

<PAGE>

of the Demised Premises to a party other than Lessee, such sale or
financing shall be under and subject to this Agreement and Lessee's rights
hereunder.

     18. ASSIGNMENT. This Agreement shall be freely assignable by Lessee,
provided, however, that Lessee shall provide thirty (30) days written notice of
assignment to Lessor. Lessee shall be permitted to sublet all or any portion of
the Demised Premises provided such sublet is necessary to accommodate the
equipment of Lessee's customers. Lessor may sell, assign, or transfer the
Demised Premises or its interest herein, subject, however, to the terms of this
Agreement and Lessee's tenancy hereunder.

     19. CONFIDENTIALITY OF AGREEMENT TERMS. Lessor agrees that it shall keep
all terms of this Agreement confidential. No information regarding this
Agreement is to be divulged by Lessor without the written consent of Lessee.

     20. REMEDIES CUMULATIVE. No remedy herein conferred upon or reserved to
Lessor or Lessee is intended to be exclusive of any other remedy herein
contained or by law provided, but each shall be cumulative and shall be in
addition to every other remedy given hereunder or now or hereafter existing at
law, in equity or by statute.

     21. GOVERNING LAW. This Agreement and the performance thereof shall be
governed, interpreted, construed and regulated by the laws of the Commonwealth
of Pennsylvania. Jurisdiction and venue of any dispute arising hereunder shall
lie with the Court of Common Pleas in the County where the Demised Premises is
located, or with the U.S. District Court for the Middle District of
Pennsylvania; it being expressly agreed

                                       15
<PAGE>

that the choice of jurisdiction and venue relative to such dispute shall be made
by Lessee in its sole discretion.

     22. SUCCESSORS AND ASSIGNS. This Agreement shall extend to and bind the
heirs, personal representatives, successors, and assigns of the parties hereto.

     23. MULTIPLE COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

     24. RECORDING. This Agreement shall not be recorded. The parties agree to
execute a Memorandum of this Agreement in the form attached hereto which Lessee
may record, at its expense, in the appropriate office for the recordation of
real estate conveyances for the county in which the Demised Premises is located.
Lessor shall execute and deliver to Lessee any other affidavits, statements, or
documents needed to record the Memorandum.

     25. HEADINGS. Section headings in this Agreement are inserted only for
reference and in no way define, limit, or describe the scope or intent of this
Agreement nor affect its terms and provisions.

     26. SEVERABILITY. The unenforceability or invalidity of any provision of
this Agreement shall not affect the validity or enforceability of the Agreement
as a whole or any other provision thereof.

                                       16
<PAGE>

     27. INTERPRETATION. Each party to this Agreement and their counsel have had
an opportunity to review and revise this Agreement. The normal rule of
construction that any ambiguities are to be resolved against the drafting party
shall not be employed in the interpretation of this Agreement or OF any
amendments or exhibits thereto.

     28. NOTICES. Any notice provided for herein shall be given in writing and
shall be deemed validly given if delivered by personal delivery, nationally
recognized overnight air carrier service, or certified or registered United
States mail, postage prepaid, return receipt requested, addressed as follows:

              Lessor:       65 Public Square Associates
                            One South Main Street
                            Wilkes-Barre, PA 18701

              Lessee:       Fastnet Corporation
                            Two Courtney Place, Suite 130
                            3864 Courtney Street
                            Bethlehem, PA 18017

              Attention:    Mark Horinko

     Notice shall be deemed effective upon receipt or refusal to accept
delivery. The person to whom and the place to which notices are to be delivered
may be changed from time to time by either party by written notice given to the
other party,

     29. ENTIRE AGREEMENT; AMENDMENT. This Agreement contains the entire
agreement between the parties hereto and no other verbal or oral agreements,
promises, or understandings shall be binding upon either Lessor or Lessee in any
dispute, controversy, or proceeding at law. Any addition, variation, or
modification to this Agreement

                                       17
<PAGE>

shall be void and ineffective unless made in a writing signed by Lessor and
Lessee.

     IN WITNESS WHEREOF, the parties hereto have set their hands and affixed
their respective seals the day and year first above written.

                                   LESSOR:
       WITNESS:                    65 Public Square Associates

                                   By:
       --------------------------     ---------------------------
                                   Title:
                                         ------------------------
       ATTEST:                     LESSEE:

                                   FASTNET CORPORATION

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

                                   By:    /S/ DAVID K. VAN ALLEN
                                      ---------------------------

                                   Title: CHIEF EXECUTIVE OFFICER
                                         ------------------------

                                  EXHIBIT A- I

                              RULES AND REGULATIONS

1.     The sidewalk, vestibules, elevators, stairways and corridors shall not be
obstructed by any of the tenants, or used by them, for any other purpose than
for ingress and egress from and to their respective offices.

2.     The floors, skylights, windows, doors and transoms that reflect or admit
light into passageways, or into any place in said building, shall not be covered
or obstructed by any

                                       18

<PAGE>

of the tenants. The toilet rooms, water closets, and other water apparatus shall
not be used for any purposes other than those for which they were constructed,
and sweepings, rubbish, rags, ashes, chemicals, or the refuse from electric
batteries, or other unsuitable substances, shall be thrown therein. Any damage
resulting from such misuse or abuse shall be home by the tenant by whom or by
whose employees it shall be caused.

3.     No sign, advertisement, or notice shall be inscribed, painted, or affixed
on any part of the outside or inside of said building, or on any doors therein,
unless of such color, size and style and in such places, upon or in said
building, as shall be first designated by the Lessor and endorsed hereon.

4.     No additional locks shall be placed upon any doors of the premises, and
the tenant will not permit any duplicate keys to be made (all necessary keys
will be furnished by the Lessor), but if more than two or by the tenant..  Upon
the termination of this lease, the tenant must leave the windows, and doors in
the demised premises, in a like condition as at the date of said lease, and must
then surrender all keys, delivered to said tenant, of rooms, water closets and
vaults.

5.     No tenant shall do or permit anything to be done in said premises, or
bring anything therein which will in any way increase the rate of fire insurance
on said building, or on property kept therein, or conflict with any insurance
policy upon said building, or any part thereof, or in any way expose the
premises to damage by fire.

6.     The bringing into the building, taking therefrom or therein of safes,
furniture, fixtures or supplies shall only be at such time and such manner as
the superintendent of the building shall designate.  The Lessor shall have the
right to prescribe the weight and

                                       19
<PAGE>

positions of all safes, which sale shall, in all cases, stand upon planks two
inches thick or metal equivalent thereto: and all damage to the building or any
part thereof caused by taking in, putting Out, removing or maintaining in the
building, safes, furniture, fixtures or supplies, shall be repaired at the
expense of the tenant responsible for the presence thereof.

7.     The Lessor shall have the fight, in person or by its agent, to retain a
passkey and to enter any premises at reasonable hours in the day or night to
examine the same, or to run telegraph or electric wires, or to make such
repairs, additions and alterations as it shall deem necessary for the safety,
preservations, or restoration of the said building, or for the safety or
convenience of the occupants thereof, and also to exhibit the said premises to
be let, and put upon them the usual notice.  "For Rent", which same notice shall
not be removed or obliterated by any tenant during the three months previous to
the expiration of the lease of the premises.

8.     Tenants, their clerks or servants, shall not make or commit any improper
noises or disturbances of any kind in the building, smoke in the elevator, or
mark or defile it, or mark or defile the water closets, or toilet rooms, or the
walls, windows or doors of the building, or interfere in any way with tenants or
those having business with them.

9.     No carpet, rug, or other article shall be hung or shaken out of any
window, and nothing shall be thrown or allowed to drop by the tenants, their
clerks, or employees out of the windows or doors or down the passages or sky,'
lights of the building: and no Lessee shall sweep or throw, or permit to be
swept from the ]eased premises, any dirt or

                                       20
<PAGE>

other substance into any of the corridors or halls, elevators or stairways of
said building, or into any of the light shafts or ventilators thereof.

10.    No animals or birds shall be kept in or about the premises.

11.    Tenants shall not use or keep in the building any explosives, kerosene,
camphine, gasoline, burning fluid, or other illuminating material, except
electric light or candies.

12.    No picture or other nails or screws shall be driven or inserted in any
part of the walls or woodwork of said building, nor shall any part thereof be
defaced by any Lessee; nor shall die walls or partitions be painted, papered, or
otherwise covered, or in any way marked or broken, without the consent of the
Lessor.

13.    All ordinary cleaning, repairing and restoring of the public elevator
shall be affected out of ordinary business hours as far as possible: but in case
it shall become necessary, or proper at any time, from accident or for improving
the condition or operation or the elevator, boiler, machinery, or anything
appertaining thereto, Lessor shall be at liberty to stop the operation of it
during the day; but in such case due diligence shall be used to complete work.
Freight shall not be transported in the elevator if its weight is in excess of
the weight specified on the posted official notice in the said elevator.  All
freight transported onto or from the said elevator shall be done so by use of a
device which will not damage or mar the flooring or walls of the said elevator.

14.    That the tenant will not use or permit upon said premises anything that
will invalidate any policies of insurance now or hereafter carried on said
building- that the tenant will pay all extra insurance premiums on the said
building which may be caused

                                       21
<PAGE>

by the use which said tenant shall make of said demised premises; that the
tenant will not use or permit upon said premises anything that may be dangerous
to life or limb, the tenant will comply with all governmental, health and policy
requirements and regulations respecting said premises and will not use said
premises for lodging or sleeping purposes.

16.    Lessor shall have the right to prohibit any advertising by any tenant,
which, in Lessors opinion, tends to impair the reputation of the building or its
desirability as a building for offices, and upon written notice from the Lessor,
tenant shall refrain or discontinue such advertising.

17.    Canvassing, soliciting or peddling in the building is prohibited and each
tenant shall cooperate to prevent same.

18.    There shall not be used in any space, or in the public halls of any
building, either by any tenant or by jobbers or others, in the delivery or
receipt of merchandise, any handtrucks, except those equipped with rubber tires
and side guards.

19.    The Lessor reserves the right to make such other and further reasonable
rules and regulations as, in its judgment, may from time to time be needful for
tile safety, care, and cleanliness of tile premises, and for the preservation of
good order therein, which when so made and notice thereof given to the Lessee,
shall have the same force and effect as if originally made a part of the
foregoing lease; such other and further rules not, however, to be inconsistent
with the proper and rightful enjoyment by the Lessee under the foregoing lease
of the premises therein referred to.

                                       22
<PAGE>

                                 Acknowledgment

COUNTY OF LUZERNE           )
                            ) ss
STATE OF PENNSYLVANIA       )

       On this 15th day of November 1999, before me personally appeared
               to me known as the                    of 65 Public Square
Associates and acknowledged the within and foregoing instrument to be the
free and voluntary act and deed of 65 Public Square Associates, for the uses
and purposes therein mentioned and on oath stated that he/she was authorized
to execute said instrument on behalf of 65 Public Square Associates and that
the seal affixed (if any) is the corporate seal of said corporation.

       IN WITNESS WHEREOF, I have hereunto set my hand and affixed my Official
Seal the day and year first above written.

                                                         -----------------------
                                                         Notary Public

My commission Expires: October 16, 2000
                      -----------------

<PAGE>

                                 Acknowledgment

COUNTY OF            )
                     ) ss
STATE OF             )

       On this 15th day of November 1999, before me personally appeared David K.
Van Allen to me known as the Chief Executive Officer of FASTNET CORPORATION and
acknowledged the within and foregoing instrument to be the free and voluntary
act and deed of said corporation, for the uses and purposes therein mentioned
and on oath stated that he/she was authorized to execute said instrument and
that the seal affixed (if any) is the corporate seal of said corporation.

       IN WITNESS WHEREOF, I have hereunto set my hand and affixed my Official
Seal the day and year first above written.

                                                         -----------------------
                                                         Notary Public

My commission Expires: November 8, 2003
                      -----------------

<PAGE>

                                    EXHIBIT A

<PAGE>

                                   EXHIBIT A-1

                              RULES AND REGULATIONS

       1.     The sidewalk, vestibules, elevators, stairways and corridors shall
not be obstructed by any of the tenants, or used by them, for any other purpose
than for ingress and egress from and to their respective offices.

       2.     The floors, skylights, windows, doors and transoms that reflect or
admit light into passageways, or into any place in said building, shall not be
covered or obstructed by any of the tenants. The toilet rooms, water closets,
and other water apparatus shall not be used for any purposes other than those
for which they were constructed, and sweepings, rubbish, rags, ashes, chemicals,
or the refuse from electric batteries, or other unsuitable substances, shall be
thrown therein. Any damage resulting from such misuse or abuse shall be borne by
the tenant by whom or by whose employees it shall be caused.

       3 .    No sign, advertisement, or notice shall be inscribed, painted, or
affixed on any part of the outside or inside of said building, or on any doors
therein, unless of such color, size and style and in such places, upon or in
said building, as shall be first designated by the Lessor and endorsed hereon.

       4.     No additional locks shall be placed upon any doors of the
premises, and the tenant will not permit any duplicate keys to be made (all
necessary keys will be furnished by the Lessor), but if more than two keys for
any doorlock shall be desired, the additional number must be paid for by the
tenant.  Upon the termination of this lease, the

<PAGE>

tenant must leave the windows, and doors in the demised premises, in a like
condition as at the date of said lease, and must then surrender all keys,
delivered to said tenant, of rooms, water closets and vaults.

       5.     No tenant shall do or permit anything to be done in said premises,
or bring anything therein which will in any way increase the rate of fire
insurance on said building, or on property kept therein, or conflict with any
insurance policy upon said building, or any part thereof, or in any way expose
the premises to damage by fire.

       6.     The bringing into the building, taking therefrom or therein of
safes, furniture, fixtures or supplies shall only be at such time and such
manner as the superintendent of the building shall designate. The Lessor shall
have the right to prescribe the weight and positions of all safes, which sale
shall, in all cases, stand upon planks two inches thick or metal equivalent
thereto: and all damage to the building or any part thereof caused by taking in,
putting Out, removing or maintaining in the building, safes, furniture, fixtures
or supplies, shall be repaired at the expense of the tenant responsible for the
presence thereof.

       7.     The Lessor shall have the night, in person or by its agent, to
retain a passkey and to enter any premises at reasonable hours in the day or
night to examine the same, or to run telegraph or electric wires, or to make
such repairs, additions and alterations as it shall deem necessary for the
safety, preservations, or restoration of the said building, or for the safety or
convenience of the occupants thereof, and also to exhibit the said premises to
be let, and put upon them the usual notice. "For Rent", which

<PAGE>

same notice shall not be removed or obliterated by any tenant during the three
months previous to the expiration of the lease of the premises.

       8.     Tenants, their clerks or servants, shall not make or commit any
improper noises or disturbances of any kind in the building, smoke in the
elevator, or mark or defile it, or mark or defile the water closets, or toilet
rooms, or the walls, windows or doors of the building, or interfere in any way
with tenants or those having business with them.

       9.     No carpet, rug, or other article shall be hung or shaken out of
any window, and nothing shall be thrown or allowed to drop by the tenants, their
clerks, or employees out of the windows or doors or down the passages or sky,'
lights of the building: and no Lessee shall sweep or throw, or permit to be
swept from the leased premises, any dirt or other substance into any of the
corridors or halls, elevators or stairways of said building, or into any of the
light shafts or ventilators thereof

       10.    No animals or birds shall be kept in or about the premises.

       11.    Tenants shall not use or keep in the building any explosives,
kerosene, camphine, gasoline, burning fluid, or other illuminating material,
except electric light or candles.

       12.    No picture or other nails or screws shall be driven or inserted in
any part of the walls or woodwork of said building, nor shall any part thereof
be defaced by any Lessee; nor shall die walls or partitions be painted, papered,
or otherwise covered, or in any way marked or broken, without the consent of the
Lessor.

<PAGE>

       13.    All ordinary cleaning, repairing and restoring of the public
elevator shall be affected out of ordinary business hours as far as possible:
but in case it shall become necessary, or proper at any time, from accident or
for improving the condition or operation or the elevator, boiler, machinery, or
anything appertaining thereto, Lessor shall be at liberty to stop the operation
of it during the day; but in such case due diligence shall be used to complete
work. Freight shall not be transported in the elevator if its weight is in
excess of the weight specified on the posted official notice in the said
elevator. All freight transported onto or from the said elevator shall be done
so by use of a device which will not damage or mar the flooring or walls of the
said elevator.

       14.    That the tenant will not use or permit upon said premises anything
that will invalidate any policies of insurance now or hereafter carried on said
building; that the tenant will pay all extra insurance premiums on the said
building which may be caused by the use which said tenant shall make of said
demised premises; that the tenant will not use or permit upon said premises
anything that may be dangerous to life or limb, the tenant will comply with all
governmental, health and policy requirements and regulations respecting said
premises and will not use said premises for lodging or sleeping purposes.

       16.    Lessor shall have the right to prohibit any advertising by any
tenant, which, in Lessors opinion, tends to impair the reputation of the
building or its desirability as a building for offices, and upon written notice
from the Lessor, tenant shall refrain or discontinue such advertising.

<PAGE>

       17.    Canvassing, soliciting or peddling in the building is prohibited
and each tenant shall cooperate to prevent same.

       18.    There shall not be used in any space, or in the public halls of
any building, either by any tenant or by jobbers or others, in the delivery or
receipt of merchandise, any handtrucks, except those equipped with rubber tires
and side guards.

       19.    The Lessor reserves the right to make such other and further
reasonable rules and regulations as, in its judgment, may from time to time be
needful for tile safety, care, and cleanliness of tile premises, and for the
preservation of good order therein, which when so made and notice thereof given
to the Lessee, shall have the same force and effect as if originally made a part
of the foregoing lease; such other and further rules not, however, to be
inconsistent with the proper and rightful enjoyment by the Lessee under the
foregoing lease of the premises therein referred to.

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