Document:

<PAGE>

August 31, 1998                                                    EXHIBIT 10.12

Mr. Dave Van Allen
You Tools Corporation/FASTNET
3864 Courtney Street, #130
Bethlehem, PA  18017

Re:  Master Lease Agreement No. 9161, Schedule No. 02

Dear Mr. Van Allen:

This is a letter of agreement and acknowledgment between You Tools Corporation/
FASTNET (Lessee) and Ascend Credit Corporation (Lessor) that the Rent
Commencement Date is SEPTEMBER 30, 1998 which supersedes section 2 of the Master
Lease Agreement No. 9161 and supersedes Paragraph 6 on Lease Schedule No. 02.

Except as modified by this Acknowledgment Letter, the terms and conditions of
the Master Lease Agreement and Lease Schedule shall remain in full force and
effect.

Please sign where I have marked an "X" and overnight to the address on this
letter.

If you have any questions, please don't hesitate to call me at (408) 436-8647
ext. 7538.

Regards,

ASCEND CREDIT CORPORATION

Tamara V. Nicolao
Admin./Operations

Agreed and Acknowledged by:

Lessee:    You Tools Corporation/FASTNET

By:    /s/ David K. Van Allen
       -------------------------

Name:  David K. Van Allen
       -------------------------

Title: CEO
       -------------------------

Date:  9/18/98
       -------------------------

<PAGE>

                                                           LEASE SCHEDULE NO. 01

This Schedule and its supplements incorporate by this reference the terms and
conditions of the Master Lease Agreement, Number 9161, between Ascend Credit
Corporation (Lessor) and You Tools Corporation/FASTNET (Lessee).

1.   SUPPLIER:      Ascend Communications Inc.

2.   LOCATION OF EQUIPMENT:  See Attachment A.

3.   EQUIPMENT VALUE:  $346,464.00  (exclusive of sales and/or use taxes).

4.   LEASE TERM: The Lease Term of the Equipment described in this Schedule
     shall begin on the Rent Commencement Date referenced below in Paragraph 6
     and its expiration date shall be 36 months after such Rent Commencement
     Date.

5.   RENT: $10,705.74 per month (exclusive of sales and/or use taxes) due and
     payable at the Rent Commencement Date and on the same date of each
     succeeding month of the Lease Term. The advance Rent payment shall be
     $10,705.74. This amount is $ N/A for the first month and $10,705.74 for the
     last 1 month(s), of the Lease Term.

6.   RENT COMMENCEMENT DATE:   3/27/97

7.   PURCHASE OPTION: Lessee shall have the option to purchase the Equipment for
     its fair market value for continued use ("FMV"), on the expiration of this
     Lease or any renewal term, provided Lessee is not in default of any of its
     obligations under this Lease on such expiration date. This purchase option
     may only be exercised by Lessee's written notice to Lessor not earlier than
     180 days, nor later than 90 days, prior to the end of the Lease Term or any
     renewal term. The purchase price for such Equipment shall be payable upon
     the expiration date of such term. FMV shall be equal to the value of the
     Equipment installed and in use, with consideration given to the age,
     condition, utility and replacement costs for the Equipment. In the event
     that Lessor and Lessee are unable to agree upon the purchase price for the
     Equipment, such purchase price will be determined by an independent
     appraiser to be selected by Lessor. Lessee shall be responsible for all
     applicable sales and/or use taxes on the Equipment. Upon exercise of this
     purchase option and payment of the purchase price, Lessor shall execute and
     deliver to Lessee such documents as Lessee may reasonably request in order
     to vest in Lessee all right, title and interest in the Equipment.

8.   RENEWAL OPTION: Lessee shall have the option to renew this Lease, on the
     expiration date of this Lease or any renewal term, for the fair market
     rental for the continued use of the Equipment ("FMR") and on such other
     terms as may be agreed upon by Lessor and Lessee prior to such expiration
     date, provided Lessee is not in default of any of its obligations under
     this lease on such expiration date. This renewal option may only be
     exercised by Lessee's written notice to Lessor not earlier than 180 days,
     nor later than 90 days, prior to the end of the Lease Term or any renewal
     term. FMR shall be equal to the value of the monthly rental of the
     Equipment installed and in use, with consideration given to the age,
     condition, utility and replacement costs for the Equipment, for the renewal
     term.

9.   TAX BENEFITS: Lessee understands that Lessor intends to claim the "Tax
     Benefits", consisting of the maximum Modified Accelerated Cost Recovery
     System deductions for the minimum useful life applicable to each item of
     Equipment, as provided by Sections 168(b)

<PAGE>

and (c) of the Internal Revenue Code of 1986, and analogous benefits under state
law, with respect to the Equipment. Lessee represents and warrants that: (i)
Lessee has not been, is not now, and during the term of this Lease will not
become, and will not allow the Equipment to be used by or leased to, a
tax-exempt entity or government agency; and (ii) Lessee is not now, and during
the term of this Lease will not become, a public utility. Without limitation by
the preceding sentence, Lessee agrees not to take any action, fail to take any
action, or misstate any fact which may result in any loss to Lessor of the Tax
Benefits.

     Lessee agrees to pay promptly to Lessor an amount which will fully
     compensate Lessor, on an after-tax basis, for any loss of the Tax Benefits,
     plus interest, penalties and additions to tax, any loss in time value of
     the Tax Benefits, and any taxes imposed on any such compensation payment,
     resulting from Lessee's acts, omissions or misstatements, including,
     without limitation, with respect to the representations and warranties in
     the preceding paragraph. A loss of Tax Benefits occurs at the earliest of:
     (i) the happening of any event causing the loss; (ii) payment by Lessor of
     any additional tax resulting from the loss; or (iii) any adjustment to the
     tax return of Lessor. Lessor's right to recovery of a loss of Tax Benefits
     shall survive the expiration or termination of this Lease.

10.  DESCRIPTION OF EQUIPMENT: See Schedule A which is attached hereto and made
     a part hereof by this reference.

The person executing this Schedule on behalf of Lessee hereby certifies that he
or she has read, and is duly authorized to execute, this Schedule

Accepted by:
Ascend Credit Corporation                 LESSEE:  You Tools Corporation/FASTNET

BY:                                       BY: /s/ David K. Van Allen
   ----------------------------------        -----------------------------------

NAME:                                     NAME: David K. Van Allen
     --------------------------------          ---------------------------------

TITLE:                                    TITLE:  CEO
      -------------------------------           --------------------------------

DATE:                                     DATE: 3/26/97
     --------------------------------          ---------------------------------

<PAGE>

                                                           LEASE SCHEDULE NO. 02

This Schedule and its supplements incorporate by this reference the terms and
conditions of the Master Lease Agreement, Number 9161, between Ascend Credit
Corporation (Lessor) and You Tools Corporation/FASTNET (Lessee).

1.   SUPPLIER:    Ascend  Communications, Inc.

2.   LOCATION OF EQUIPMENT:  See Attachment A.

3.   EQUIPMENT VALUE:  $1,105,967.00 (exclusive of sales and/or use taxes).

4.   LEASE TERM: The Lease Term of the Equipment described in this Schedule
     shall begin on the Rent Commencement Date referenced below in Paragraph 6
     and its expiration date shall be 36 months after such Rent Commencement
     Date.

5.   RENT: $34,174.38 per month (exclusive of sales and/or use taxes) due and
     payable at the Rent Commencement Date and on the same date of each
     succeeding month of the Lease Term. The advance Rent payment shall be
     $68,348.76. This amount is $34,174.38 for the first month and $34,174.38
     for the last 1 month(s), of the Lease Term.

6.   RENT COMMENCEMENT DATE:  September 30, 1998

7.   PURCHASE OPTION: Lessee shall have the option to purchase the Equipment for
     its fair market value for continued use ("FMV"), on the expiration of this
     Lease or any renewal term, provided Lessee is not in default of any of its
     obligations under this Lease on such expiration date. The purchase option
     may only be exercised by Lessee's written notice to Lessor not earlier than
     180 days, nor later than 90 days, prior to the end of the Lease Term or any
     renewal term. The purchase price for such Equipment shall be payable upon
     the expiration date of such term. FMV shall be equal to the value of the
     Equipment installed and in use, with consideration given to the age,
     condition, utility and replacement costs for the Equipment. In the event
     that Lessor and Lessee are unable to agree upon the purchase price for the
     Equipment, such purchase price will be determined by an independent
     appraiser to be selected by Lessor. Lessee shall be responsible for all
     applicable sales and/or use taxes on the Equipment. Upon exercise of this
     purchase option and payment of the purchase price, Lessor shall execute and
     deliver to Lessee such documents as Lessee may reasonably request in order
     to vest in Lessee all right, title and interest in the Equipment.

8.   RENEWAL OPTION: Lessee shall have the option to renew this Lease, on the
     expiration date of this Lease or any renewal term, for the fair market
     rental for the continued use of the Equipment ("FMR") and on such other
     terms as may be agreed upon by Lessor and Lessee prior to such expiration
     date, provided Lessee is not in default of any of its obligations under
     this lease on such expiration date. This renewal option may only be
     exercised by Lessee's written notice to Lessor not earlier than 180 days,
     nor later than 90 days, prior to the end of the Lease Term or any renewal
     term. FMR shall be equal to the value of the monthly rental of the
     Equipment installed and in use, with consideration given to the age,
     condition, utility and replacement costs for the Equipment, for the renewal
     term.

9.   TAX BENEFITS: Lessee understands that Lessor intends to claim the "Tax
     Benefits", consisting of the maximum Modified Accelerated Cost Recovery
     System deductions for the

<PAGE>

minimum useful life applicable to each item of Equipment, as provided by
Sections 168(b) and (c) of the Internal Revenue Code of 1986, and analogous
benefits under state law, with respect to the Equipment. Lessee represents and
warrants that: (i) Lessee has not been, is not now, and during the term of this
Lease will not become, and will not allow the Equipment to be used by or leased
to, a tax-exempt entity or government agency; and (ii) Lessee is not now, and
during the term of this Lease will not become, a public utility. Without
limitation by the preceding sentence, Lessee agrees not to take any action, fail
to take any action, or misstate any fact which may result in any loss to Lessor
of the Tax Benefits.

     Lessee agrees to pay promptly to Lessor an amount which will fully
     compensate Lessor, on an after-tax basis, for any loss of the Tax Benefits,
     plus interest, penalties and additions to tax, any loss in time value of
     the Tax Benefits, and any taxes imposed on any such compensation payment,
     resulting from Lessee's acts, omissions or misstatements, including,
     without limitation, with respect to the representations and warranties in
     the preceding paragraph. A loss of Tax Benefits occurs at the earliest of:
     (i) the happening of any event causing the loss; (ii) payment by Lessor of
     any additional tax resulting from the loss; or (iii) any adjustment to the
     tax return of Lessor. Lessor's right to recovery of a loss of Tax Benefits
     shall survive the expiration or termination of this Lease.

10.  DESCRIPTION OF EQUIPMENT: See Schedule A which is attached hereto and made
     a part hereof by this reference.

The person executing this Schedule on behalf of Lessee hereby certifies that he
or she has read, and is duly authorized to execute, this Schedule

Accepted by:
Ascend Credit Corporation                 LESSEE:  You Tools Corporation/FASTNET
                                                 -------------------------------
BY:                                       BY:  /s/ David K. Van Allen
   ----------------------------------        -----------------------------------
NAME:                                     NAME:  David K. Van Allen
   ----------------------------------          ---------------------------------

TITLE:                                    TITLE:  CEO
      -------------------------------           --------------------------------

DATE:                                     DATE:  9/18/98
     --------------------------------          ---------------------------------

<PAGE>

EXTENSION SHEET FOR UNIFORM COMMERCIAL CODE FINANCING STATEMENTS

STATE OF:  PA                                         NUMBER OF SHEETS:  1

The Equipment listed below:

<TABLE>
<CAPTION>

QUANTITY                   DESCRIPTION
--------------------------------------------------------------------------------
<S>                        <C>
5                          TNT DUAL AC BASE CHASSIS
5                          SPARE 19" RACK MOUNT KIT
5                          SHIELD TO ROUTE EXHAUST TO REAR
5                          STANDARD S/W RELEASE FOR TNT
5                          DOMESTIC POWER CORD
33                         SERIES 56 48 PORT DIGITAL MODEM CARDS
11                         OCTAL CT1 TI/PRI MODULE
5                          100 BASE-T ETHERNET CARD
5                          HYBRID ACCESS 192 S/W ENABLE
5                          ISDN SIGNALLING S/W ENABLE

1                          ASCEND ACCESS CONTROL

6                          TNT DUAL AC BASE CHASSIS
6                          SPARE 19" RACK MOUNT KIT
6                          SHIELD TO ROUTE EXHAUST TO REAR
6                          STANDARD S/W RELEASE FOR TNT
6                          DOMESTIC POWER CORD
6                          ISDN SIGNALLING S/W ENABLE
6                          100 BASE-T ETHERNET CARD
6                          HYBRID ACCESS 192 S/W ENABLE
28                         SERIES 56 48 PORT DIGITAL MODEM CARDS
3                          REDUNDANT AC POWER SUPPLY
11                         OCTAL CT1 T1/PRI MODULE

</TABLE>

has been sold by Ascend Communications, Inc. and all additions, substitutions,
and upgrades thereto whether now or hereafter in the Lessee's possession. This
equipment is more fully described in SCHEDULE NO. 02-01 AND 02-02 TO MASTER
LEASE AGREEMENT 9161 between Debtor and Secured Party. This filing is made for
information purposes only. The equipment covered hereby is the subject of a
lease transaction with Debtor as Lessee and Secured Party as Lessor.

Debtor:           You Tools Corporation/FASTNET
Secured Party:    ASCEND Credit Corporation

<PAGE>

LOCATION:                                              SCHEDULE #     9161-02-02

You Tools Corporation/FASTNET
2130 Arch Street
Philadelphia, PA  18001

<TABLE>
<CAPTION>

QTY      PART #             DESCRIPTION                             EXTENDED
-------------------------------------------------------------------------------
<S>      <C>                <C>                                     <C>
6        TNT-2AC            TNT DUAL AC BASE CHASSIS                  $[ * ]
6        TNT-SP-RM19        SPARE 19" RACK MOUNT KIT                  $[ * ]
6        TNT-SP-SHIELD      SHIELD TO ROUTE EXHAUST TO REAR           $[ * ]
6        TNT-SR-STD         STANDARD S/W RELEASE FOR TNT              $[ * ]
6        POW-CORD-DOM       DOMESTIC POWER CORD                       $[ * ]
6        TNT-SO-ISDN        ISDN SIGNALLING S/W ENABLE                $[ * ]
6        TNT-SL-E100        100 BASE-T ETHERNET CARD                  $[ * ]
6        TNT-SL-HA192       HYBRID ACCESS 192 S/W ENABLE              $[ * ]
28       TNT-SL-DM48-S56    SERIES 56 48 PORT DIGITAL MODEM CARDS     $[ * ]
3        TNT-SP-AC          REDUNDANT AC POWER SUPPLY                 $[ * ]
11       TNT-SL-CT1         OCTAL CT1 T1/PRI MODULE                   $[ * ]

                                                   TOTAL:           $489,719

</TABLE>

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

<PAGE>

LOCATION:                                               SCHEDULE #    9161-02-01

You Tools Corporation/FASTNET
3864 Courtney Street, #130
Bethlehem, PA  18017

<TABLE>
<CAPTION>

QTY      PART #               DESCRIPTION                             EXTENDED
-------------------------------------------------------------------------------

<S>      <C>                  <C>                                     <C>
5        TNT-2AC              TNT DUAL AC BASE CHASSIS                 $[ * ]
5        TNT-SP-RM19          SPARE 19" RACK MOUNT KIT                 $[ * ]
5        TNT-SP-SHIELD        SHIELD TO ROUTE EXHAUST TO REAR          $[ * ]
5        TNT-SR-STD           STANDARD S/W RELEASE FOR TNT             $[ * ]
5        POW-CORD-DOM         DOMESTIC POWER CORD                      $[ * ]
33       TNT-SL-DM48-S56      SERIES 56 48 PORT DIGITAL MODEM CARDS    $[ * ]
11       TNT-SL-CT1           OCTAL CT1 T1/PRI MODULE                  $[ * ]
5        TNT-SL-E100          100 BASE-T ETHERNET CARD                 $[ * ]
5        TNT-SL-HA192         HYBRID ACCESS 192 S/W ENABLE             $[ * ]
5        TNT-SO-ISDN          ISDN SIGNALLING S/W ENABLE               $[ * ]

1        AAC-CD               ASCEND ACCESS CONTROL                    $[ * ]

                                                        TOTAL:         $616,248

</TABLE>

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

                                                                  EXHIBIT 10.13

SUN MICROSYSTEMS
FINANCE

A SUN MICROSYSTEMS, INC. BUSINESS

MASTER LEASE AGREEMENT

MASTER LEASE # SL2321

Lessor agrees to lease to Lessee and Lessee agrees to lease from Lessor, subject
to the following terms of this Master Lease Agreement ("Master Lease") and any
Lease Schedule ("Schedule"), collectively referred to as the Lease ("Lease"),
the personal property described in any Schedule together with all attachments,
replacements, parts, substitutions, additions, upgrades, accessories, software
licenses and operating manuals (the "Product"). Each Schedule shall constitute a
separate, distinct, and independent Lease and contractual obligation of Lessee.

1.       COMMENCEMENT DATE AND TERM

The initial lease term ("Initial Term") and Lessee's rental obligations shall
begin on the Commencement Date and continue for the number of Rental Periods
specified in the Lease as set forth in Section 2 below and shall renew
automatically thereafter until terminated by either party upon not less than
ninety (90) days prior written notice. The Commencement Date with respect to
each item of Product shall be the 16th day after date of shipment to Lessee.

2.       RENT AND RENTAL PERIOD

All rental payments and any other amounts payable under a Lease are collectively
referred to as "Rent". The Rental Period shall mean the rental payment period of
either calendar months, quarters, or as otherwise specified in each Schedule.
Rent for the specified Rental Period is due and payable in advance, to the
address specified in Lessor's invoice, on the first day of each Rental Period
during the Initial Term and any extension (collectively, the "Lease Term"),
provided, however, that Rent for the period of time (if any) from the
Commencement Date to the first day of the first Rental Period shall begin to
accrue on the Commencement Date. If any Rent is not paid when due, Lessee will
pay a service fee equal to five percent (5%) of the overdue amount plus interest
at the rate of one and one half percent (1.5%) per month or the maximum legal
interest rate, whichever is less.

3.       NET LEASE, TAXES AND FEES

Each Schedule shall constitute a net lease and payment of Rent shall be absolute
and unconditional, and shall not be subject to any abatement, reduction, set
off, defense, counterclaim, interruption, deferment or recoupment for any reason
whatsoever. Lessee agrees to pay Lessor when due shipping charges, fees,
assessments and all taxes (municipal, state and federal) imposed upon a Lease or
the Product or its ownership, leasing, renting, possession or use except for
taxes based on Lessor's income.

4.       TITLE

Product shall always remain personal property. Lessee shall have no right or

                                       1
<PAGE>

interest in the Product except as provided in this Master Lease and the
applicable Schedule and shall hold the Product subject and subordinate to the
rights of Lessor. Lessee agrees to execute UCC financing statements as and when
requested by Lessor and hereby appoints Lessor as its attorney-in-fact to
execute such financing statements. Lessor may file a photocopy of any Lease as a
financing statement.

Lessee will, at its expense, keep the Product free and clear from any liens or
encumbrances of any kind (except any caused by Lessor) and will indemnify and
hold Lessor harmless from and against any loss or expense caused by Lessee's
failure to do so. Lessee shall give Lessor immediate written notice of any
attachment or judicial process affecting the Product or Lessor's ownership. If
requested, Lessee will label the Product as the property of Lessor and shall
allow, subject to Lessee's reasonable security requirements, the inspection of
the Product during regular business hours.

5.       USE, MAINTENANCE AND REPAIR

Lessee, at its own expense, shall keep the Product in good repair, appearance
and condition, other than normal wear and tear and shall obtain and keep in
effect throughout the term of the Schedule a hardware and software maintenance
agreement with the manufacturer or other party acceptable to Lessor. All parts
furnished in connection with such repair and maintenance shall be manufacturer
authorized parts and shall immediately become components of the Product and the
property of Lessor. Lessee shall use the Product in compliance with the
manufacturer's or supplier's suggested guidelines.

6.       DELIVERY AND RETURN OF PRODUCT

Lessee assumes the full expense of transportation, insurance, and installation
to Lessee's site. Upon termination of each Schedule, Lessee will provide Lessor
a letter from the manufacturer certifying that the Product is in good operating
condition and is eligible for continued maintenance and that the operating
system is at the then current level, unless under a Sun service contract during
the Lease Term. Lessee, at its expense, shall deinstall, pack and ship the
Product to a U.S. location identified by Lessor. Lessee shall remain obligated
to pay Rent on the Product until the Product and certification are received by
Lessor.

7.       ASSIGNMENT AND RELOCATION

Lessee may sublease or assign its rights under this agreement with Lessor's
prior written consent, which consent shall not be unreasonably withheld,
subject, however, to any terms and conditions which Lessor may require. No
permitted assignment or sublease shall relieve Lessee of any of its obligations
hereunder.

Lessee acknowledges Lessor may sell and/or assign its interest or grant a
security interest in each Lease and/or the Product to an assignee ("Lessor's
Assignee"), so long as Lessee is not in default hereunder. Lessor or Lessor's
Assignee shall not interfere with Lessee's right of quiet enjoyment and

                                       2
<PAGE>

use of the Product. Upon the assignment of each Lease, Lessor's Assignee
shall have any and all discretions, rights and remedies of Lessor and all
references to Lessor shall mean Lessor's Assignee. In no event shall any
assignee of Lessor be obligated to perform any duty, covenant or condition under
this Lease and Lessee agrees it shall pay such assignee without any defense,
rights of set-off or counterclaims and shall not hold or attempt to hold such
assignee liable for any of Lessor's obligations hereunder.

Lessee, at its expense, may relocate Product (after packing it for shipment in
accordance with the manufacturer's instructions) to a different address with
thirty (30) days prior written notice to Lessor. The Product shall at all times
be used solely within the United States.

8.       UPGRADES AND ADDITIONS

Lessee may affix or install any accessory, addition, upgrade, equipment or
device on the Product ("Additions") provided that such Additions (i) can be
removed without causing material damage to the Product, (ii) do not reduce the
value of the Product and (iii) are obtained from or approved by Sun Microsystems
Computer Corporation and are not subject to the interest of any third party
other than Lessor. Any other Additions may not be installed without Lessor's
prior written consent. At the end of the Schedule Term, Lessee shall remove any
Additions which (i) were not leased by Lessor and (ii) are readily removable
without causing material damage or impairment of the intended function, use, or
value of the Product and restore the Product to its original configuration. Any
Additions which are not so removable will become the Lessor's property (lien
free).

9.       LEASE END OPTIONS

Upon written notice given at least ninety (90) days prior to expiration of the
Lease Term, and provided Lessee is not in default under any Schedule, Lessee may
(i) exercise any purchase option set forth on the Schedule, or (ii) renew the
Schedule for a minimum extension period of twelve (12) months, or (iii) return
the Product to Lessor at the expiration date of the Schedule pursuant to Section
6 above.

10.        INSURANCE, LOSS OR DAMAGE

Effective upon shipment of Product to Lessee and until Product is received by
Lessor, Lessee shall provide at its expense (i) insurance against the loss or
theft or damage to the Product for the full replacement value, and (ii)
insurance against public liability and property damage. Lessee shall provide a
certificate of insurance that such coverage is in effect, upon request by
Lessor, naming Lessor as loss payee and/or additional insured as may be
required.

Lessee shall bear the entire risk of loss, theft, destruction of or damage to
any item of Product. No loss or damage shall relieve Lessee of the obligation to
pay Rent or any other obligation under the Schedule. In the event of loss or
damage, Lessee shall promptly notify Lessor and shall, at Lessor's option, (i)
place the Product in good condition and repair, or (ii) replace the Product with
lien free Product of the same model, type

                                       3
<PAGE>

and configuration in which case the relevant Schedule shall continue in full
force and effect and clear title in such Product shall automatically vest in
Lessor, or (iii) pay Lessor the present value of remaining Rent plus the buyout
purchase option price provided for in the applicable Schedule.

11.      SELECTION, WARRANTIES AND
         LIMITATION OF LIABILITY

Lessee acknowledges that it has selected the Product and disclaims any reliance
upon statements made by Lessor. Lessee acknowledges and agrees that use and
possession of the Product by Lessee shall be subject to and controlled by the
terms of any manufacturer's or, if appropriate, supplier's warranty, and Lessee
agrees to look solely to the manufacturer or, if appropriate, supplier with
respect to all mechanical, service and other claims, and the right to enforce
all warranties made by said manufacturer are hereby assigned to Lessee for the
term of the Schedule.

EXCEPT AS SPECIFICALLY PROVIDED HEREIN, LESSOR HAS NOT MADE AND DOES NOT MAKE
ANY REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, AS TO ANY MATTER
WHATSOEVER, INCLUDING, WITHOUT LIMITATION, NON-INFRINGEMENT, THE DESIGN,
QUALITY, CAPACITY OR CONDITION OF THE PRODUCT, ITS MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. IT BEING AGREED THAT AS THE LESSEE SELECTED BOTH THE
PRODUCT AND THE SUPPLIER, NO DEFECT, EITHER PATENT OR LATENT SHALL RELIEVE
LESSEE OF ITS OBLIGATION HEREUNDER. LESSEE AGREES THAT LESSOR SHALL NOT BE
LIABLE FOR SPECIFIC PERFORMANCE OR ANY LIABILITY, LOSS, DAMAGE OR EXPENSE OF ANY
KIND INCLUDING, WIHTOUT LIMITATION, INDIRECT, INCIDENTAL, CONSEQUENTIAL OR
SPECIAL DAMAGES OF ANY NATURE, DAMAGES ARISING FROM THE LOSS OF USE OF PRODUCT,
LOST DATA, LOST PROFITS, OR FOR ANY CLAIM OR DEMAND.

12.        INDEMNITY

Lessee shall indemnify and hold harmless Lessor and Lessor's Assignee from and
against any and all claims, actions, suits, proceedings, liabilities, damages,
penalties, costs and expenses (including reasonable attorneys' fees), arising
out of the use, operation, possession, ownership (for strict liability in tort
only), selection, leasing, maintenance, delivery or return of any item of
Product.

13.        DEFAULT AND REMEDIES

Lessee shall be in default of any Lease if (i) Lessee fails to pay Rent within
ten (10) days of due date; (ii) Lessee fails to perform or observe or breaches
any covenant or condition or any representation or warranty in such Lease, and
such failure or breach continues unremitted for a period of ten (10) days after
written notice from Lessor; (iii) Lessee, except as expressly permitted in the
Lease, attempts to move, sell,

                                       4
<PAGE>

transfer, encumber, or sublet without consent any item of Product leased under
such Lease; (iv) Lessee files or has filed against it a petition in bankruptcy
or becomes insolvent or makes an assignment for the benefit of creditors or
consents to the appointment of a trustee or receiver or either shall be
appointed for Lessee or for a substantial part of its property without its
consent, or (v) Lessee or any guarantor of Lessee is declared legally deceased
or if Lessee shall terminate its existence by merger, consolidation, sale of
substantially all of its assets or otherwise.

Upon default, Lessor may, at its option, take one or more of the following
actions; (i) declare all sums due and to become due under the Schedule
immediately due and payable, (ii) require Lessee to return immediately all
Product leased under such Schedule to Lessor in accordance with Paragraph 6
hereof, (iii) without breach of the peace take immediate possession of and
remove the Product; (iv) sell any or all of the Product at public or private
sale or otherwise dispose of, hold, use or lease to others, or; (vi) exercise
any right or remedy which may be available to Lessor under applicable law,
including the right to recover damages for the breach of the Schedule. In
addition, Lessee shall be liable for reasonable attorney's fees, other costs and
expenses resulting from any default, or the exercise of Lessor's remedies,
including placing such Product in the condition required by Paragraph 6 hereof.
Each remedy shall be cumulative and in addition to any other remedy otherwise
available to Lessor at law or in equity. No express or implied waiver of any
default shall constitute a waiver of any of Lessor's other rights.

14.        LESSEE'S REPRESENTATIONS

Lessee represents and warrants for this Master Lease and each Schedule that the
execution, delivery and performance by Lessee have been duly authorized by all
necessary corporate action; the individual executing was duly authorized to do
so; the Master Lease and each Schedule constitute valid binding agreements of
the Lessee enforceable in accordance with their terms that all information
supplied by Lessee, including but not limited to the credit application and
other financial information concerning Lessee, is accurate in all material
respects as of the date provided; and if there is any material change in such
information prior to manufacturer's or, if appropriate, supplier's shipment of
Product under the Schedule, Lessee will advise Lessor of such change in writing.

15.        APPLICABLE LAW

This Master Lease and each Schedule shall in all respects be governed by and
construed in accordance with the laws of the state of California without giving
effect to the principles of conflict of laws.

16.        MISCELLANEOUS

Lessee agrees to execute and deliver to Lessor such further documents,
including, but not limited to, financing statements, assignments, and financial
reports and take such further action as Lessor may reasonably request to protect
Lessor's interest in the Product.

                                       5
<PAGE>

The performance of any act or payment by Lessor shall not be deemed a waiver of
any obligation or default on the part of Lessee. Lessor's failure to require
strict performance by Lessee of any of the provisions of this Master Lease shall
not be a waiver thereof. No rights or remedies referred to in Article 2A of the
Uniform Commercial Code will be conferred on Lessee unless expressly granted in
this Master Lease.

This Master Lease together with any Schedule constitutes the entire
understanding between the parties and supersedes any previous representations or
agreements whether verbal or written with respect to the use, possession and
lease of the Product described in that Schedule. In the event of a conflict, the
terms of the Schedule shall prevail over the Master Lease.

No amendment or change of any of the terms or conditions herein shall be binding
upon either party unless they are made in writing and are signed by an
authorized representative of each party. Each Schedule is non-cancellable for
the full term specified and each Schedule shall be binding upon, and shall inure
to the benefit of Lessor, Lessee, and their respective successors, legal
representatives and permitted assigns.

All agreements, representations and warranties contained herein shall be for the
benefit of Lessor and shall survive the execution, delivery and termination of
this Master Lease, any Schedule or related document.

Any provision of this Master Agreement and/or each Schedule which is
unenforceable shall not cause any other remaining provision to be ineffective or
invalid. The captions set forth herein are for convenience only and shall not
define or limit any of the terms hereof. Any notices or demands in connection
with any Schedule shall be given in writing by regular or certified mail at the
address indicated in the Schedule, or to any other address specified.

                                       6
<PAGE>

THIS MASTER LEASE SHALL BECOME FFECTIVE
ON THE DATE ACCEPTED BY LESSOR.
                                                  You Tools Corporation, for its
LESSOR:  SUN MICROSYSTEMS FINANCE        LESSEE:  Fastnet Division
     A Sun Microsystems, Inc. Business           -------------------------------
                                                 (Full legal name of Lessee)
                                                 (Business Entity)

BY: /s/ Gregg E. Gerst                   BY: /s/ David K. Van Allen
    -------------------------                ----------------------------
   (Authorized Signature)                    (Authorized Signature)

NAME: Gregg E. Gerst                     NAME: David K. Van Allen
     ------------------------                  ---------------------------
TITLE: Manager, U.S. Leasing Programs    TITLE: VP & CEO
       -----------------------------           --------------------------
DATE: February 10, 1997
      -----------------

                                       7
<PAGE>

<TABLE>
<S>                                                     <C>
                                                        Lease Schedule ("Schedule") No. ___02_____
                                                        To Master Lease Agreement ("Master Lease") No. SL2321

------------------------------------------------------- --------------------------------------------------------------
                        LESSEE                                                     LESSOR
------------------------------------------------------- --------------------------------------------------------------
NAME:  You Tools Corporation, for its                   SUN MICROSYSTEMS FINANCE
       Fastnet Division                                 A SUN MICROSYSTEMS, INC. BUSINESS
------------------------------------------------------- --------------------------------------------------------------
ADDRESS: 961 Marcon Boulevard                           2550 GARCIA AVENUE
         Allentown, PA  18103                           MOUNTANVIEW, CA 94043
------------------------------------------------------- --------------------------------------------------------------
ADMIN. CONTACT:  Phil Weller
------------------------------------------------------- --------------------------------------------------------------
PHONE NO.:        610-954-5200                          PHONE NO.:  800-735-5786       FAX NO.:  800-786-8688
------------------------------------------------------- --------------------------------------------------------------
                   BILLING ADDRESS                                            PAYMENT SCHEDULE
------------------------------------------------------- --------------------------------------------------------------
       Two Courtney Place, Suite 130                    LEASE TERM:  24 Months
       3854 Courtney Street                             RENTAL:  $[ * ]                PER Month
       Bethlehem, PA  18017
------------------------------------------------------- --------------------------------------------------------------
LESSEE PURCHASE ORDER;  42PW-2391                       SALES/USE TAX: Payment amount may be increased to include
                                                                       applicable sales/use tax.
------------------------------------------------------- --------------------------------------------------------------
CONTACT:
------------------------------------------------------- --------------------------------------------------------------
PHONE NO.:
------------------------------------------------------- -------------------------------------------------------------
                 LOCATION OF PRODUCT                                        END OF LEASE OPTIONS
------------------------------------------------------- --- ---- ----------------------------------------------------
       Same as billing address                              X    FMV PURCHASE OR RENWAL
-------------------------------------------------------     ---- ----------------------------------------------------
                                                                 $1 PURCHASE OPTION
-------------------------------------------------------     ---- ----------------------------------------------------
                                                                 10% PURCHASE OPTION
-------------------------------------------------------
                                                                 OTHER:
-------------------------------------------------------     ----
CONTACT:  Phil Weller
-------------------------------------------------------
PHONE NO:  610-954-5200
------------------------------------------------------- -------------------------------------------------------------
PRODUCT DESCRIPTION    AS DESCRIBED IN RARITAN VALLEY COMPUTER CORP. SALES QUOTATION DATED OCTOBER 10, 1997 TOTALING
$[ * ] ATTACHED HERETO.
----------------------------------------------------------------------------------------------------------------------
MASTER AGREEMENT: This Schedule is issued and effective this date set forth below pursuant to the Master Lease
identified above. All of the terms, conditions, representations and warranties of the Master Lease are hereby
incorporated herein and made a part hereof as if they were expressly set forth in this Schedule and this Schedule
constitutes a separately enforceable, complete and independent lease with respect to the Product described herein. By
their execution and delivery of this Schedule, the parties hereby affirm all of the terms, conditions, representations
and warranties of the Master Lease.

The additional terms set forth on the reverse side hereof are made a part of this Schedule.
----------------------------------------------------------------------------------------------------------------------

AGREED AND ACCEPTED BY:                                 AGREED AND ACCEPTED BY:

SUN MICROSYSTEMS FINANCE                                LESSEE:  YOU TOOLS CORPORATION, FOR ITS
A SUN MICROSYSTEMS, INC. BUSINESS                                FASTNET DIVISION

BY:    /s/ Robert J. Reinke                             BY:    /s/ Stanley F. Bielicki
   -----------------------------                            ----------------------------------
NAME: Robert J. Reinke                                  NAME: Stanley F. Bielicki
      --------------------------                              --------------------------------
TITLE:  Operations Manager                              TITLE:  CFO
      --------------------------                              --------------------------------
DATE:  October 28, 1997                                 DATE:   10/24/97
      --------------------------                              --------------------------------

[*] 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.

</TABLE>

                                        8

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